Addicted to Smartphones Essay

Have you ever experienced a sudden burst of laughter from someone beside you, and when you turn your head, that person is just watching his or her cell phone without realizing that he or she is in public and disturbs others? Have you ever paid attention to what people around you are doing when waiting for a bus, sitting in the subway, or even before a meal comes to the table? How many of them are holding a smartphone with eyes focused on the screen and fingertips busy dancing back and forth on the touch panel, and never get bored? With the development of 3G and wireless technology, cell phones are no longer restricted to simple communications such as calling or texting. After the appearance of smartphones, things like surfing the Internet, socializing, taking photos or even FaceTime can be done instantly in your hand. See more: My Writing Process Essay Smartphones are becoming parts of many people’s lives. These days, a new phenomenon named â€Å"smartphone addiction† has emerged. In fact, recently in China, the spread of smartphones has attracted more and more young people into the world of virtual Internet at the expense of their interaction with real world relationships; it has also aroused heated discussions on whether or not we should take some actions on limiting this tendency. As a matter of fact, even though smartphones have created a more convenient life and have also changed our way of communication in a digital era, the improper use of smartphones is problematic in our daily lives, and the public should be aware of this. It is necessary for the Chinese to pay serious attention to the excessive dependence on smartphones, and try to lessen the negative influence of smartphones in our daily interpersonal relationships. Before talking about the impacts, we have to take a look at the smartphone market in China. According to the new figures from International Data Corporation, IDC’s worldwide quarterly mobile phone tracker, China’s share of the global smartphone market will rise to 20.7%, up from 18.2% in 2011 (Moscaritolo). Wong Teck Zhung, the senior market analyst with IDC’s Asia/ Pacific client devices team, stated that â€Å"[Chinese] smartphone shipments [were] expected to take a slim lead over the U.S. in 2012[, and there would] be no turning back this leadership changeover† (qtd. in Moscaritolo). This change in leadership means that China will become the leading country-level market for smartphones. Moreover, China even â€Å"overtook the UK and became the second largest country in application downloads. A quarter of ‘Angry Birds’ global downloads lies in China. In 2011, 613,445 applications were available in China, 74% of which were free versus 25% globally† (â€Å"China at your fingertips†). By the end of the second quarter of 2012, smartphone users in China have hit 290 million, while among them, 59% lies in the age group 18-34 (â€Å"Q2 2012†), as indicated from the report released by Iimedia which is the largest telecom and wireless consulting institution in China. Therefore, young people have become major smartphone customers. In terms of the way people communicating, the smartphone revolution constitutes a second major milestone after the Internet. The report from Iimedia shows that by the end of this June, the amount of China mobile Internet users has topped 388 million (â€Å"Q2 2012†). For the first time in Chinese history, mobile Internet users have gone beyond PC netizens, and turn into the biggest Internet terminal. Since China has become the world’s largest country of smartphone consumption, Chinese are engaging more than ever with electronic media which is represented by smartphones. It is worth taking a closer look to see how dependent Chinese people are upon their smartphones through some data from a film clip done by GroupM Interaction which is the global leading media investment management group: More than 500 Chinese magazines have more digital downloads than traditional circulation. Single-day mobile transactions on Taobao during its â€Å"12.12† promotion topped RMB 200 million, while 1 in 5 Taobao users accesses the site via mobile. 2011 mobile e-commerce in China reached RMB 11.5 billion. Westerners pray before eating, while 67% of Chinese take photos and post them on-line. Smartphone users check their mobile phones every 6 minutes. 38% of smartphone users spend more than 5 hours a day on their phone. Mobile is the new cigarette. 92% of youth use their mobile phones on the toilet. Each day over 1,000 people start a new romantic relationship via their mobile phones. (â€Å"China at your fingertips†) Based on the information above, it is not difficult to see that many people have become too engaged with smartphones. As a result, this heavy engagement has led to the unique dependence on smartphones and, consequently, causes Chinese people’s addiction to them. A new study from the University of Maryland asked 200 students to undertake a 24-hour media-free assignment including their smartphones, and the conclusion found â€Å"that most college students [were] not just unwilling, but functionally unable to be without their media links to the world† (â€Å"Students Addicted to Social Media†). Here is what the project director Susan D. Moeller, a journalism professor at the University of Maryland and the director of the International Center for Media and the Public Agenda which conducted the study, notes: We were surprised by how many students admitted that they were â€Å"incredibly addicted† to media†¦ The students did complain about how boring it was [to] go anywhere and do anything without being plugged into music on their MP3 players, [b]ut what they spoke about in the strongest terms was how their lack of access to text messaging, phone calling, instant messaging, email and Facebook, meant that they couldn’t connect with friends who lived close by, much less those far away (qtd. In â€Å"Students Addicted to Social Media†). After 24 hours abstinence, the students’ responses show â€Å"that students’ lives are wired together in such ways that opting out of that communication pattern would be tantamount to renouncing a social life† (â€Å"Students Addicted to Social Media†). Many students did not even realize how much their cell phones had meant to them. In a British study, 36% of the students claimed that they cannot be separated from their cell phones (Ji). Medical authorities are even considering â€Å"whether to designate Internet addiction as a disease in the upcoming fifth edition of the Diagnostic and Statistical Manual of Mental Disorders† (Shelton). In fact, not just the U.S, China is under the same situation of this marvelous smartphone addiction. A research done by a multinational market research company, Synovateon, observed 8, ;[lm000 people from all over 11 countries, and found out that people from China and Singapore had the most obvious smartphone-obsessed symptoms (Ji). Due to the fact that almost everyone around is suffering the same condition more or less, many people in China do not consider this addiction as a severe problem. However, smartphone addiction does become influential in our daily life and affect people’s interpersonal relationship subconsciously. These days, plenty of people interrupt social conversations to check messages on their mobile devices. More and more Chinese like to take out their cell phones while gathering with friends. Looking at cell phones from time to time has become a major habit for many people in China. Barry S. Fagin, a professor of computer science, once declared that â€Å"the Internet has a strong potential to adversely affect social relationships† (Fagin). With today’s rapid growth of smartphones and wireless technology, Barry’s opinion cannot be more proper. Recently, Mr. Zhang, a citizen from Tsingtao, together with his brother went to visit their grandfather. While the old man tried to talk many times at the table, the children in front were all concentrating on their smartphones until he broke a plate with a long face, and asked them to go eat with their cell phones (Ji). More unfortunately, this case is not singular. People have entertaining conversations with strangers online via smartphones, whereas being mean to daily face-to-face talks. Chinese people are easily giving up their real life affection because of a little smartphone. I have heard my friend saying that let Siri be your friend, but then, what about your real friends? Even so, some may still argue that just like the Internet, smartphones have brought the whole world even closer and have made it possible for instant communication. With nowadays boom in technology, with smartphones and our access to the Internet being so easy, the possibility of information access from anywhere at any time means that distance might not be so important and obvious like it was. As an international student studying abroad, FaceTime does allow me to contact my family and friends over the Pacific wherever I want as long as we are both awake and have an iPhone in hand. The appearance of smartphones might seem to have reduced the distance between people. Nevertheless, it is not totally true. Studies have shown that â€Å"most people still keep in touch with their personal group of friends and social network in the real life via the Internet and phones† (Ji). A man in the U.S. will not be attracted by any Chinese home pages on Facebook, while a Chinese, in most cases, is not interested in reading in English as well. There is not too much for smartphones to contribute in bringing the world closer for many people. Instead, they make the distance even further, not physically, but mentally. Just like an online rearrangement of a proverb goes, â€Å"the furthest distance in the world is not between life and death, but when I stand in front of you, yet you are playing with your cell phone† (qtd. in Ji). In the research conducted by the University of Maryland, a student wrote: â€Å"Texting and IM-ing my friends gives me a constant feeling of comfort. When I did not have those two luxuries, I felt quite alone and secluded from my life. Although I go to school with thousands of students, the fact that I was not able to communicate with anyone via technology was almost unbearable†(â€Å"Students Addicted to Social Media†). This information is dangerous. Getting used to smartphones makes people even more lonely and isolated from the real world. People, especially the young generation tends to focus too much on their smartphones, which is partly a result of their fear of self-loneliness and the lack of the ability of being alone. If things continue in this way, people are losing the ability of daily interpersonal communicating. A study done by Stanford University shown that â€Å"every other hour people spend in front of their computers, they would cut at least 30 minutes’ face-to-face communications† (Ji), and the same happens to smartphones. This fact has made researchers worried about â€Å"the neural circuit which controls people’s ability of face-to-face communication will degenerate, thus decreasing the neurotransmitters in the brain and even losing the whole function of this part† (Ji). With time goes on, human will lose the ability of identifying the hidden meaning behind a certain expression or language from others, which we achieved from a long time evolution. If this worry ever came true, it would be the biggest tragedy in the digital era. So, after talking all above, what can be done to eliminate this addiction and help the Chinese to find better ways for using their smartphones? Experts suggested that people should take some mandatory measures (â€Å"Experts†). A game played by my friends might be able to provide some good advice. Every time hanging out for meals, we will put all of our phones in the center of the table, and whoever is the first one to reach his or her cell phone during the meal is going to pay for everyone. Besides, sports and outdoor exercises will also help. People, especially in China where they normally stay indoors with nice air-conditioning and comfortable equipment, should open themselves to more outdoor activities. When doing something outdoor, being enveloped under the bright sunshine, sweating a little bit, and completely enjoying yourself, you will find no reason to keep addicted to your smartphones. Compared to the beauty of nature, nothing really matters. There is nothing wrong with falling in love with your smartphones. However, the Chinese have to realize the effect this love may bring on to them. The improper use of smartphones not only has negative influence on themselves in real life relationships, but it is also not respectful to others. In the modern world, of course we cannot live without smartphones, but we can do something more fun. Find what you like instead of smartphones, go for it, and enjoy yourself. Smartphones are just tools, not our complete life. Do not let them take over all our joy of life. Works Cited China at your fingertips. Dir. Tony Chen. Prod. Bessie Lee. GroupM Interaction, 2012. Film Clip. â€Å"Experts teach you how to get rid of your cell phone addiction†. Medpharm & Health 9 (2012): 5-5. Web. 25 Nov. 2012. Fagin, Barry S. â€Å"The Internet Makes Distance Matter Less for Good and Ill†. The Internet. Ed. Gary Wiener. Detroit: Greenhaven Press, 2010. 22-28. Print. Ji, Guoliang. â€Å"The Furthest Distance in the World†. City National Newspaper 15 Oct. 2012. Web. 13. Nov. 2012. Moscaritolo, Angela. â€Å"China to Overtake U.S. as Top Smartphone Market in 2012†. PC Magazine Mar 2012: 1-1. Academic Search Complete. Web. 20 Nov. 2012. â€Å"Q2 2012 Chinese Smartphone Market Monitoring Report†. Iimedia (2012): n.pag. Web. 20 Nov. 2012. Shelton, Jim. â€Å"Hi, I’m (insert name here), and I’m a Facebook addict†. New Haven Register 10 Mar. 2012. Opposing Viewpoints in Context. Web. 25 Nov. 2012. â€Å"Students Addicted to Social Media- New UM Study†. University of Maryland Newsdesk 21 Apr. 2010. Web. 19 Nov. 2012.

Communicators of the Sea Essay

Dolphins are common creatures at rivers and seas. Majority of small toothed whales are dolphins. Dolphins are large sea animals making it part of the cetaceans, where whales and porpoises belong (Stoops, 1996). Dolphins belong to family Plantanistidae and Delphinidae, respectively. Often, people used dolphins and porpoises interchangeably denoting same species but porpoises in particuclar and dolphins are different species. Porpoises belong to family Phocaenidae; it has a rounded snout and chisel-liked teeth. While dolphins are under family Plantanistidae and Delphinidae, instead of a rounded snout, dolphins have beak like snout and sharp, conical teeth (http://www. dolphinlovers. com/facts. php) Fig. 1 Comparison between the snout of a porpoise and a dolphin Dolphins are outgoing creatures; often they are mingling in a group with two to fifteen animal members or more. Most of their communities are dominated by females, its offspring, sisters and other females. Subadult male dolphins will leave these female-dominated communities to start a group of â€Å"bachelor† dolphins; if these dolphins become sexually mature, they can move in the female groups for copulation. These mammals are very playful. They are often spotted riding the bow wave or stern wake of boats and â€Å"surfing† on waves. Chasing and tossing things to one another is one of their favorite plays. If seen jumping or breaching, it indicates enthusiasm for these creatures. Play is important for dolphins for learning and as well as to practice their skills necessary for their life’s survival (Geocities. com, 2006). Communication among marine animals, dolphins in particular are extensive and complex. The current paper focuses on these creatures’ characteristics, particularly their capability to engage in echolocation. Dolphins can see their environment like that of an X-ray machine and thereby transmitting this x-ray like images to other dolphins. If sight is very crucial for land animals, dolphins use a sound â€Å"seeing† system called echolocation. Echolocation is a sensory sonar system used by dolphins for communication purposes and for locating things in their environment. Through the sound waves released and listened to – size, shape distance speed direction and internal structure of an object is determined. This sound seeing system provides information such as water depth and the position of food and rocks making it effortless for them to catch their prey. (http://www. botany. uwc. ac. za/Envfacts/facts/dolphins. htm, 2007). Scope The paper begins with an introduction about the dolphin, and their general characteristics as sea creatures. This is followed by a discussion of their general physiology, including their skin, fin, swimming speed, breathing, and body temperature. The dolphin family is then discussed, with its 33 species – with 5 river species and 6 porpoise species. Of these, the most popular is said to be the bottlenose dolphin which are found in theme parks and are featured in television programs. The next focus would be on the dolphin’s brainpower, speficically in their capacity to make tunes among themselves with a wide range of sounds. Their distinctive communication patterns are likewise expounded on. The paper concludes with a call for concern and protection from humans, who are supposed to be stewards of these creatures. Overview With regards to its general physiology, dolphins have rubbery skin. They are classified as mammals and have the capacity of maintaining high body temperature. They can hold their breath for several minutes making it easy for them to have rapid and deep dives of more then 300 m (1,000 ft). To date, there are more than 33 different species of dolphins, over 5 different species of river dolphins and more than 6 different species of porpoises. Though there are many species of dolphins, the most popular are bottlenose dolphins which are frequently featured in television and theme parks. Perhaps their greatest strength is their ability to communicate with one another or to echolocate. This is the counterpart of language among humans. Dolphins create whistles and sounds signifying an action for which another dolphin can understand, it can signal danger for their kind hence they should be alert or a prey is near at hand thus, everybody must prepare; depending on the whistle produced. They can make signature whistles that carry distinct information. Considering the cognitive abilities of bottlenose dolphins, their vocal learning and copying skills, and their fission–fusion social structure, their communication process can be further studied to provide evidences about their â€Å"dolphin messages and echoes. † Humans have the responsibility of taking care of these creatures, acting as their stewards to prevent them from extinction. General Physiology of a Dolphin A dolphin’s body is smooth having a rubbery-feel of its hairless skin when touched. The skeletal remnants of five digits in the front appendage form the flippers mainly acting as its balancer during its swim. The rear appendages are almost absent because the small pelvic bones are deep-rooted in the connective tissue at the base of the tail (Dolphin Lovers. com, 2006). The subcutaneous dermal tissue of the dolphin forms its immovable dorsal fin; its tail fin is also dermal in its origin. Its movement is similar with the whales wherein the major force comes from its vertical oscillations of the tail and flukes making it capable to swim at a speed of 37-40 km/h, and in some events, its swimming speed reaches up to 48 km/h. Dolphins seem restless in traveling the rivers but in reality, it rides the bow wave by making use of the ship’s trust (Stoops, 1996) Dolphins are mammals, hence breathing and maintaining high body temperature is vital. Dolphins maintain its internal temperature at 36. 5 deg to 37. 2 deg C (97. 9 deg to 99 deg F), with its thick layer of dense fat (blubber) under the skin. At the top of its head, a single nostril or blowhole is placed where it acts as its lungs. Dolphins breathe air at the surface every two minutes consisting of brief unpredictable exhalation followed by a longer inhalation. Dolphins are capable to hold their breath for several minutes making it easy for them to have rapid and deep dives of more then 300 m (1,000 ft) (Dolphin Lovers. com, 2006). Their swimming capabilities attribute to its powerful tail and the special function of its skin. Due to their streamlined body contour enabling them to have rapid movements and deep dives in the sea like most marine animals. Fig. 2 General physiology of a dolphin The Dolphin Family There are more than 33 different species of dolphins, over 5 different species of river dolphins and more than 6 different species of porpoises (Geocities. com, 2006). Fig. 3 Some Species of the Dolphin Family Though there are many species mentioned, bottlenose dolphins (Tursiops truncatus) are the most familiar species. It gained popularity because it has been a mainstay of TV programs. Also, people have the chance to meet and greet bottle nose dolphins at ocean-theme parks. The biggest dolphin specie is the one seen in the movie â€Å"Free Willly†; Orca (Orcinus orca) or the killer whale where the males can grow up to 9. 6 meters http://www. dolphinear. com/data/dolphin_species. htm Fig. 4. Picture of Orca and the Bottlenose Dolphin Dolphin’s Brainpower Greco and Gini (2005) say that dolphins are capable of making tunes among themselves with a wide range of sounds. Dolphins show evidence that their intelligence is greater than that of dogs. Dolphins learn easily and execute complicated tasks, continuous communications with one another, and their ability to mimic the sounds of human language if they are given ample time to be trained. Toothed whales have exceptionally large brains including the famously bright dolphins that have capabilities previously only attributed to humans and apes. Cetaceans (dolphins, whales and porpoises) and its ancestors acquired changes specifically in their brain through evolution. One of the reliable evidence to support this claim is by measuring the level of encephalization of a species or a taxonomic group. EQ is the measure of observed brain size relative to expected brain size derived from a regression of brain weight on body weight for a sample of species. EQ measures how much larger or smaller a species’ total brain size is from what is expected based on brain-body allometry (Greco et. al, 2003). Dolphins and humans share many common attributes. Both creatures are mammals wherein the young are born alive and not hatched from eggs. Air is important for both organisms since it sustains their breathing; the only difference is that dolphins must come up to the surface to breathe in its blowhole on the top of its head and when it dives, the blowhole closes unlike humans that continuously breathe air in its respiratory system. Wang (1995) asserts that aside from being mammals, communication is one the major attributes keeping these two organisms at par with one another. Humans are capable of language and speeches denoting an idea or message for a particular person while dolphins create whistles and sounds signifying an action for which another dolphin can understand, it can signal danger for their kind hence they should be alert or a prey is near at hand thus, everybody must prepare; depending on the whistle produced. Fig. 5 Illustration of the brain size of (a) archaeocete, Cetacean’s ancestor (b) dolphin Distinctive Communication of Dolphins The capabilities of different organisms are astounding particularly in identifying objects from a far. The association between object characteristics such as visual shape, and sensory characteristics like retinal projection, is unclear. The processes on how these characteristics work hand-in-hand remains imprecise. Dolphins communicate by making two types of sounds: vocalizations and echolocation are the two sounds produced by dolphins for communication. Vocalizations are the squeaking sounds from the blowhole that is often heard by humans which is used by dolphins to communicate. Echolocation also called sonar, is a distinctive ability of dolphins to locate and discern objects down under (Janik, 2000). A dolphin releases a particular sound and listens for the echo allowing dolphins to travel under dark waters without bumping or hitting into anything. As much as 1,200 clicks/ sound can be produced in a second and can be transmitted in advance These clicks are from the rounded forehead of the dolphin, melon; along with its lower jaw filled with jelly-like substances for sound waves amplification. When a dolphin swims, the head is moved back and forth to skim through its surroundings, while the echoes are send out to bounce off objects aiming at the lower jawbone, returning sound waves to the inner ear, and this whole process occur rapidly, similarly to how fast a human brain decodes if the individual accidentally touches a hot object. The pitch of the returning echo and the time it takes to get there is important so the dolphin can determine the shape, size, speed, texture, and density of the object; even inside of an object, almost like an X-ray (McCowan, 2001). Echolocation is not solely for communicative processes; it also serves the purpose of locating preys, other dolphins, predators, a lost baby or a sick dolphin. Through echolocation, it allows dolphin to explore its water world wherein sight is of little use. Also, echolocation entails fast analysis of the sound being heard as to what message is conveyed by the dolphin who send the sound (http://www. dolphins-and-more. com/dolphins-echolocation. html) If a dolphin makes a sound, the sound bounces off into objects and creatures then it bounces back in the dolphin’s direction who is going to receive the sound and the information given by it when its sonar receives it. The dolphin’s brain comprehends the message obtained, hence the dolphin will respond accordingly to the message. Echolocation provides vibrations, their frequency, the level of energy, the distance and if the object is moving or not is very important. With these factors interacting, it creates varied â€Å"dolphin messages† (Tyack, 2000). Echolocating dolphins serve as models for object recognition sonar systems. The association between echo characteristics and object characteristics was given emphasis. A dolphin may keep ‘sound templates’ in its brain and be able to recognize whole objects through listening for a particular sound. A dolphin’s brain may contain algorithms, resulting through natural endowments or experience or both, allowing it to identify object characteristics based on sounds (Wells et. al, 1987). Bottlenose dolphins are capabe of producing low frequency sounds ranging between 0. 25 to 150 kHz. Higher frequencies range make up echolocation; low frequencies sounds which is produced often are for social interaction, these low frequency signals can travel greater distance compared to that of higher as the signals travel much further distances. These frequency ranges are correlated with the amplitude obtained from studies of dolphins (Hoelzel, 2002). Click sounds are usually 40-70 microseconds, though short, these clicks are loud reaching around 220 decibels. Click trains are the sound sproduced by dolphins. It is consist of hundred or throusand of clicks per second which are high in frequency. High frequencies don’t travel as far as low frequencies, these high frequencies with very short wavelengths permit dolphins to echolocate on small objects and scrutinize the detail of an object. High frquency and the fine details of an objetc are directly proportional as such the higher frequecy produced, it would allow the dolphins to further examine the object at hand; also, it allows them to track their prey faster(www. dolphinpod. com). The localizing system ability of the dolphin Tursiops truncatus in discerning the characteristics of an object moving in radial motion was studied. The thresholds of the animals’ threshold sensitivity at its target were given focus. The speed and acceleration were measured respectively (2. 6 cm/sec) (0. 6 cm/sec2). For a target moving at a constant speed, dolphins used probe signals made of two impulses. If targets are said to be accelerating, impulses composed of three signals are used. These methods are proven effective for technical methods concerning hydrolocation and radiolocation. hydrolocation and radiolocation (Zhukovski et. al. , 2004). The dolphin’s wave production and sound is inversely proportional; for every wave production, the sound decreases by only 4  µ sec/decibel (dB). Low-frequency clicks (6-kHz peak power) are equivalent with three times increase far-reaching 12  µ sec/dB. The dolphin brainstem is capable of tracking individual click/ 6oo seconds. The latency and amplitude are inversely proportional (as latency is increasing, amplitude decreases) with increasing click rates. This proportionality may vary depending on the wave production of dolphins. The dolphin’s brain is capable of processing short frequent clicks. The wave production in correlation with latency and frequency as well as click production can further test the sonar signal processing of dolphins (Ridgway, 1981). The echolocation process – sending out clicks and listening to the click echoes – is what produces a kind of mental image of the object that a dolphin is investigating with clicks. We know that the changes in the structure of the click echoes are what a dolphin uses to form this mental image, although it is still an unsolved mystery exactly how they manage to accomplish it. This echolocation ‘image’ is unlikely to be something that a human being could imagine simply because people can’t echolocate. But, this â€Å"mental image† is currently the best analogy we’ve got. Scientists have learned from experiments with dolphin echolocation that their acoustic image is quite detailed, and allows a dolphin to do some pretty amazing things Real targets are used to study dolphin echolocation. Classifying the echo parameters is very difficult due to various factors affecting such as physical dimensions and the reflection characteristic of real targets. Dolphin echolocation sounds are transformed into artificial echoes, which are played back to the animal. The phantom echo system, a digital sound processing is used to make echo analysis easier. Echoes of several underwater targets were simulated to evaluate the quality of the method (Aubauer and Whitlow, 1998). In bats and technological sonars, the gain of the receiver is increased with time after the transmission of a signal to balance off for the lost acoustic circulation. The current understanding of dolphin echolocation reveals that automatic gain control is not a part of dolphin’s sonar system (Tyack, 2000). Field measurements of free-ranging echolocating dolphins were tested and the results showed that dolphins do have automatic gain control mechanism which is put into practice during transmission phase rather than the receiving phase of a sonar cycle. The amplitude of the dolphins’ echolocation signals are highly range dependent; this amplitude increases as the target increases, R, in a 20 log(R) fashion to compensate for propagation loss. If a school of fishes, with plenty of sound distributors would be the echolocation target, the echoes from the school will be nearly constant with range as the dolphin closes in on it. This characteristic has similar effect as time-varying gain in bats and technological sonar when considered from a sonar system perspective (Wells et. al, 1987). Echolocation – or biosonar is an auditory imaging system used by various species for navigation and for tracking their prey in their vicinity particularly that their eyesight is incapble of helping them. Emission of vocalizations by the echolocating animal are emitted, detecting the echoes of those sounds and uses them to produce three-dimensional information about the environment. Also, these sounds help dolphins to be aware of their environment, preparing for an enemy attack (www. dolphinpod. com). Toothed whales, small mammals such as rats and shrews uses echolocation. These organisms comprehend their environment via the interpretation of acoustic reflections. In other words, echolocation is not just an ordianry auditory scene analysis, itrequires specialized neural mechanisms and complex computations for the oragnism to be able to understand the message given by the sender and to intrepret it corretly by the receiver. The neural circuitry underlying echolocation allows for the perceptual organization of auditory information, which guides complex spatially-guided behaviours. (www. seaworld. org). Whistles, buzzes, qucks and pops are the sounds produced by dolphins associated with travelling, socializing and feeding. Specific sounds are produced for a specific behavior which is also associated with changed in season. Pops are signifies feeding; quacks are for socialization; buzzes are for travelling purposes. During summer, dolphins are busy socializing with other dolphins and travelling for food hunt while during fall, dolphins are preparing for migration (Jacobs et. al, 2003). Smolker and Pepper (1999) state that dolphins are eager to learn new vocalizations (whistles) throughout life. Over a 4 yr study period, three male bottlenose dolphins are subjected to form an alliance, to herd female dolphins. Among individuals, whistle sounds produce are varied. The distinctiveness of individual repertoires decreased, the sounds produced by the three bottlenose dolphins became indistinguishable, because some whistles were shared among each other. By the end of the study, the three bottlenose dolphins had a common whistling sound which was never heard before the alliance was started. The frequency modulation pattern of the signature whistles of each dolphin contains sufficient information for specificity but the information received is used by the receiver to identify individuals. Dolphins do not have individual voice features but the sound production is greatly affected by changing water pressure (Janik, 1999), make voice recognition underwater more complex than that in the air. Also, the pitch and the time travel of the whistle or the sonar produced is also affected. Animals identify each other’s whistles individually rather than just purely differentiating them. Recognition means perceiving something to be similar with an idea or learning that is previously known. Bottlenose dolphins identify themselves with a signature whistle. However, scientists have found no evidence of a dolphin language. A mother dolphin may whistle to her calf almost continuously for several days after giving birth. This acoustic imprinting helps the calf learn to identify its mother (Caldwell, Caldwell, and Tyack, 1990). Discrimination can also be used but it does not need previous learning from comparison purposes. The animals differentiate stimuli among them because animals are biased for one class of stimuli. The biases are mainly family based on a preference for an underlying feature in the modulation pattern used by related individuals. The other explanation is that the animals recognize the preferred stimulus individually particularly if the stimuli was encountered before clarifying previous confusion around the role or even existence of signature whistles (Janik, 1999,Tyack, 2000 and McCowan, 2001). Dolphins ability to and identity information in synthetic signature whistles that had all voice information removed demonstrates that the contour carries such signature information and that this information is used by the receiver. Janik and Slater (1998) argued that the need for individual recognition and group cohesion are the two key factors for the evolution of vocal learning in dolphins. Vocal learning enhances interindividual variability of signature whistles while maintaining potential group, population, or species features in the signal. In signature whistle development, a baby dolphin tends to duplicate the whistle that it only heard rarely adding slight modifications ending up as its own signature whistle (Fripp, et. al, 2005). This process leads to individually distinctive signature whistles. Geographic variation in whistle parameters over longer distances can also be a factor, the whistles produced by the dolphins at Ganges River are far different from those whistle sounds produced by those at Amazon River, or modifications are already done making each whistle sound unique (Wang,1995). However, the largest dolphin species, the killer whale (Orcinus orca), uses group-specific dialects in its communication system (Ford, 1983). Although vocal learning has evolved in one particular context, it can be used for other purposes once it is established. For example, learning also allows duplication of signals in direct social interactions. Dolphins frequently imitate each other’s whistles in the wild (Wells. et. al, 1987). These signature whistles carries identity information independent from voice features portray the possibility of using these as referential signals, either addressing individuals or referring to a group, similar to the use of names in humans. Given the cognitive abilities of bottlenose dolphins (Janik, 1999), their vocal learning and copying skills, and their fission–fusion social structure, their communication process can be further studied to provide evidences about their â€Å"dolphin messages and echoes. † Personal Conclusion All creatures have their own way of communication to their fellow species. Communication and echolocation among dolphins needs further study and experimentation. The processes involved in both communication (whistles) and echolocation are already established but the different factors affecting it are yet to be known. Dolphins have their unique sound, when calling a buddy and same with a mother dolphin calling her young. A mother dolphin whistles to her calf almost continuously for several days after giving birth. This acoustic imprinting produced by the mother dolphin helps the calf learn to identify its mother. Dolphins regulate their sounds by shunting air throughout the air sacs beneath the blowhole. Tissue structures in this area slap together (much like a trumpet player’s lips) to produce the clicks. These sounds often extend into the ultrasound region. The whistling sound and the echoes emitted aids dolphins in their survival. The problem lies if the whistling signal denotes individuality or whether it is just a modification of a whistling sound heard within the surroundings. Other factors such as geographical variation, pitch, waves and others can alter the sound produced. It is just so amazing that despite these factors which need to be further studied, the communication processes among dolphins continuously exist. The meaning of the message is not altered despite the mentioned factors. Also, hundred clicks (sounds) can be produced by dolphins within a second but they are able to produce the correct whistle for a specific event and thus the receiver dolphin reacts accordingly. Aside from the clicks produced, neural activity is still studied on how dolphins can accurately compute the frequency of the clicks emitted for them to understand the message. The whistling communication process among dolphins makes them unique among other sea creatures. Echolocation helps them to locate objects since vision would not be adequate in locating objects down under; also helping them to avoid bumping into other objects like seaweeds and corals. Whistles and echoes are the counterpart of speech and language for humans. Humans’ brains and that of dolphins are relatively of the same size. Neural activity frequency computation still remains unclear. Though many computations had been published, it still seems inadequate to explain the processes involved within the dolphin’s brain. Also, it is fascinating how these control the sound emitted. Despite the factors affecting their communication such as season, water depth, noise pollution, geographic variation their system of communication never failed. Whether it be on great depths of water, the receiver had been effective in sending his message to the receiver. Humans and dolphins are relatively similar but would that be enough to support the conclusion that organisms with bigger brain structure are capable of communicating with one another? Does it follow that complexity is proportional with brain size? Is it safe to assume that humans and dolphins are closely related? Dolphins in Danger Dolphins are indeed lovely sea creatures. It entertains us in its own ways. And often, meaningful association between humans and these sea creatures may develop just like in the movies we watch. It is just unfortunate that man harms these lovely creatures as we pollute and destroy their habitats to serve our own purpose. Human beings are the most complex life forms and we must take the responsibility of protecting these friendly sea creatures. Dying Dolphin and Porpoise References Aubauer, R. and Au, W. (1998). Phantom echo generation: A new technique for investigating dolphin echolocation. Journal of the Acoustical Society of America. 104(3). 1165-1170. Caldwell, Melba C. , David K. Caldwell, and Peter L. Tyack. â€Å"Review of the Signature- Whistle Hypothesis for the Atlantic Bottlenose Dolphin. † In The Bottlenose Dolphin, edited by Stephen Leatherwood and Randall R. Reeves, pp. 199-234. San Diego: Academic Press, Inc. , 1990. Dolphin Lovers. com (2006). Dolphin facts. Retrieved February 23, 2007 from http://www. dolphinlovers. com/facts. php. Dolphinear. com. (2006). Dolphin ear. Retrieved 24 February 2007 from http://www. dolphinear. com/data/dolphin_species. htm. Ford, J. K. B. & Fisher, H. D. (1983). In Communication and behavior of whales. Payne, R (ed. ). Westview, Boulder, 129–161.

An Examining Of The Great Commission Religion Essay

An Examining Of The Great Commission Religion Essay â€Å"God authorized and commanded me to commission you: Go out and train everyone you meet, far and near, in this way of life, marking them by baptism in the threefold name: Father, Son, and Holy Spirit. Then instruct them in the practice of all I have commanded you. I’ll be with you as you do this, day after day, right up to the end of the age.† (Matt 28:18-20 The Message) â€Å"18 And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth. 19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:   20Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen. â€Å"(Matt 28:18-20 KJV) Introduction The Gospel of Matthew ends Jesus meeting with His apostles in Galilee. This was a special meeting and would change the course of world history in many ways. The meeting was foretold by Jesus in Matthew 26:31-32 : â€Å"31 Then Jesus said to them, â€Å"You will all fall away because of me this night. For it is written, ‘I will strike the shepherd, and the sheep of the flock will be scattered.’ 32 But after I am raised up, hI will go before you to Galilee.† This meeting was announced both by an angel (Matt 28:78) and Jesus Himself (Matt28:10). It was a meeting filled with mixed emotions. Some had run away and others had denied Him before His death. Now He stood before them, alive. Their reaction was to bow down in worship (Matt 28:16-17) I was a meeting in which Jesus gave His disciples a command that we now refer to a the great commission. Someone once said that this was seen by many Christians as the great suggestion, but it is a command that lies at the heart of the Church and from which she operates. The command ends with the beautiful promise that He would always be with them. This is not something to be ignored, but to be a constant part of the C hurch’s functioning as well as that of every believer. I will be looking at what makes this commission so GREAT. I Great in its Authority To Jesus was given all authority. As the creator, He is the One who has the original right to do all things: â€Å"For by1 him all things were created, in heaven and on earth, visible and invisible, whether thrones or dominions or rulers or authorities-all things were created through him and for him. And is before all things, and in him all things hold together.† (Colossians 1:16-1) What higher authority than the creator Himself to issue such a command. As our Redeemer, this authority is even more pronounced: â€Å"who, though he was in the form of God, did not count equality with God a thing to be grasped, but made himself nothing, taking the form of a servant, being born in the likeness of men. And being found in human form, he humbled himself by becoming obedient to the point of death, even death on a cross. Therefore God has hig hly exalted him and bestowed on him the name that is above every name, so that at the name of Jesus every knee should bow, in heaven and on earth and under the earth, and every tongue confess that Jesus Christ is Lord, to the glory of God the Father.†(Philippians2:6-11)

Framework for Ethics Essay Example | Topics and Well Written Essays - 1250 words

Framework for Ethics - Essay Example From this paper it is clear that  the models in addition will analyze characterized components of the systems and expound how organizations corporate ethics enhances business performance. The models will emphasis on how business ethics programs helps in decision making using organization illustration as an example. The corporate culture has to come out clearly. The research should conclude by showing how organizations can measure ethical behavior and structure to maintain stakeholders trust.   Effective systems should enable them obtain ethical culture, improve performance output, formulate ethical decision- making and upkeep an environment that nurtures ethical behavior.According to the discussion  the improvement of business performances and ethical behaviors requires effective leaders to look for better methods to sustain them. The pressure and measurement demand for social performance has given upswing to accounting, social and ethical auditing and reporting. Corporate lead ers have used the Triple Bottom Line model to evaluate on effective framework to ethical auditing system.  The model emphasizes on environmental, social and financial effects that may affect the corporate in decision- making. Leaders engage their organizations in this model to increase their commitment on social responsibility of the corporate, their sustainability and ethical conduct. The model helps leaders confirm that directives applied and investment support add value to the organization in achieving desired output or outcomes.

Abercrombie & Fitch Internal Analysis Essay Example | Topics and Well Written Essays - 1500 words

Abercrombie & Fitch Internal Analysis - Essay Example They are also dealing with different types of accessories products like cologne and perfume. They are offering their products to different segments like youth men and women targeting the student demographics like the post graduates, graduates and college students (Graakjaer, 2012). The firm was set up in the 1892 by David Abercrombie. In the initial days, it was popular with the name David T. Abercrombie Co. It started as a waterfront shop and established for the factory in New York City area. Gradually, it gained popularity as dealers of rough, outdoor kits and accessories. The Limited Inc. acquired it during 1988 (Walters, 2008). Henceforth, from 1992, they started to provide effective fashion-attire. The casual apparel business was converted into public limited organization in the fiscal year 1996. In that time, The Limited Inc. reserved 84 percent share of business. However, in the year 1998, the parent company sold their remainder of shares among the general shareholders (Engel, 2004). In the year 1892, Abercrombie & Fitch began to produce fashion products. Recently, they are operating through the huge channel of the lifestyle and retail segment having nearly 300 stores. Product diversification strategies are being used the firms in order to attract the customers rapidly. The firm promoted "Abercrombie" stores for selling apparel products for children and teenagers. They are publishing some magazine and catalogues for disseminating features of various attire products (Bradway, 2006). The firm is producing different stylist apparel, accessories, personal care and footwear ranges in the worldwide segment. Abercrombie & Fitch is operating in more than 1000 locations with more than 13000 fulltime and 66000 part-time employees. Organizational structure of the firm can be stated with the following diagram (Lambertini, 2009). Abercrombie & Fitch Company is one of the major USA based apparel and

See the attachments Assignment Example | Topics and Well Written Essays - 2500 words

See the attachments - Assignment Example The incoming research will investigate workforce diversity in light with establishing parameters surrounding it. The report is defragmented into three key sections and a secondary section. The commencing secondary section- rationale of the study- will justify why it is important to engage in these studies. As well, the section will incorporate two key theories to support the study. The first primary section, Workforce Diversity will assess what is known about the discipline. The midsection will propose a Personal Development Plan. The last section will clarify on the learning outcomes of the PDP. There have been growing debates on the extent of diversity in organizations. Primarily, critical attention is accorded to whether organizations are affirming Corporate Social Responsibilities (CSR) in affirming to diversity. Diversity concerns stretch valiantly with gender, race, sexual orientation and physical abilities being the most visited roles. Rice (2015, p. 93) establishes that diversity might be identified as an important goal for the workforce by affirmative action, which might show positive results, but not everyone may benefit from the sometimes blunt methods applied to achieve it. Convincingly, although developing practices increase the relevance of the diversity in the organization, different groups seems to benefit more than others. The rationale for such studies is projected by the fact that not much has been done in the field of diversity. A crucial theory in these studies is Social Identity Theory. Social Identity Theory can be identified as a mixture of people with the different group identified within the same social system. Intergroup perspectives have been one of the major frameworks for understanding human interactions in a wider organizational context. The category of being perceived by others belonging to a given social category is nullified at this point. In relation to the theory, Guajardo (2014,

The expansion and settlement of the U.S Essay Example | Topics and Well Written Essays - 250 words - 1

The expansion and settlement of the U.S - Essay Example itiated the greatest sustenance mainly from Democrats especially northern states, through which the Democratic newspaper addressed an ultimate dream of widening philosophies of the U.S through no forceful and no brutal ways (Huntington). Congress and the slavery act was another reason that the US expanded. When the congress failed to pass a bill against slavery people fled in search for new territories. People fled to Kansas-Nebraska to make the positions pro or anti-slavery. Gold is a rich resource for a long time maintained the precious state. The discovery of gold in California and Klondike became a reason for people to settle in those areas in search for jobs and better lives. In addition, the completion of transcontinental Railroad 1869 as decreed by the government was another facilitator of expansion (Huntington). The ability to transport goods and people for a longer distance convinced citizens to settle wherever they wanted. People’s perception and how they have portrayed the US, has shaped the nation’s development in terms of population. Many songwriters, book authors, artists, influential leaders have painted America to be a nation flowing with milk and honey. A painting entitled American Progress has for a long time been an inspiration to most Americans and revealed the real picture of American development and expansion (Huntington). Most immigrants to the US have that thought in mind as they move to settle in the US. Among other reasons, American-Mexican war, acquisition of Hawaii and Alaska mid-19th century, French war and the Oregon Trail Dispute among many other

Can Obama Make All the Changes that He Promised Essay

Can Obama Make All the Changes that He Promised - Essay Example The message of â€Å"change† and â€Å"hope† that his campaign bombed the public with was entirely predicated on the existence of a contrast: they and I, thou and I. Obama’s election is solely attributable to this contrast and the rhetorical emphasis upon that contrast. America experienced this same phenomenon in 1976: the year in which Jimmy Carter became renowned for lofty campaign promises. All that Carter needed was an image: the image of an â€Å"outsider†, somebody â€Å"fresh†, somebody to stand in contrast with the failure of Nixon and his corruption. Like Carter, Obama has made promise under the guise of an outsider, and Americans took him on his word. But Carter met resounding failure, both in his ability to stand up for his country in the face of its enemies and to bring lasting improvement in the country’s economic situation. To the question of whether the current President can keep those promises he has given to get elected, it a ppears as though he will not be able to. As Jonathan Woon and countless commentators have indicated, there is an aura of optimism floating above Obama’s supporters. Of course, the stars are aligned for the implementation of progressive policies not seen since the legislation of New Deal policies (Woon 329). The Congress is led by Democrats in both houses, ready to submit to a Democratic President for approval. But not only are liberal members of Congress impeding the â€Å"progress† that Obama supporters are seeking, politicians have not changed their ways from the paradigm the new President called â€Å"politics as usual†. The optimism these supporters share is merely symbolic: it is what the President represents as a person, and not as a politician, which is the subject of so much hero worship. Although optimism is good when dealing with life’s problems, in excess it can stand in the way of real progress. Loyalty to people,

The Conglomerates, the Lovers, the Spies and the Outcast Essay

The Conglomerates, the Lovers, the Spies and the Outcast - Essay Example The conglomerates arrange parties, treats and keep looking for occasions of celebration. They are life long friends. They may go to different places after school, yet call one another daily. Mostly, they land in the same profession and in the same country.The lovers are groups of two. A third one is not allowed. The two are inseparable. Their academic performance may differ significantly. Lovers may have different interests, but they are attached emotionally. Many lovers are totally opposite to each other in nature, yet they make a perfect match. The effect is magnetic, just like north and south poles of the magnet attract each other. The lovers remain together full time at the school and frequently meet each other outside as well. In class jokes, the lovers are referred to as gays, but the lovers don’t care. However, their future is quite unexpected. Usually, people expect lovers to be life-long friends, just like conglomerates, but it hardly ever happens. Most lovers depart after the school is over, never to see each other again.The spies are individuals. They have no association with any group, but their social skills are quite enhanced. They survive individually. Spies have good oratory skills, so make excellent part-time friends. They have no permanent friend. One day, they can be seen with one person, the next day with another. They offer a temporary company. People suspect the spies whenever their secrets leak out. They are generally the most untrustworthy and at the same time, they are the most interesting class-mates around. The spies are witty and cunning.The outcast is also individuals, but with very poor social skills. They are not allowed entry into any group. They are hated and mocked. The outcast are objects of fun for others. The outcast fear the class-mates and hardly ever raise their voice against the injustice they are offered. They kill the time sitting around a corner in the classroom. Surprisingly, many outcast class-mates are excep tionally good in studies, perhaps because they seek refuge in books. The outcast have the most boring personalities and can’t handle mockery.  

Social networking paper Essay Example for Free

Social networking paper Essay Today, 1.5 billion people belong to an online social network, which is one out of every nine people in the world. If you are a part of this phenomenon, just how much does it affect your daily life? People join these sites for a wide variety of reasons. With just a few clicks you can speak to friends and family that may be millions of miles away; or check up on your favorite musicians latest updates. No matter what the reason, there is no denying that social networks have become a major part of society, in the work place, at home, and around the world. Many social networking sites are made for a specific group of people, such as Facebook for college students, or MySpace for music and party people. However, they all have a common structure. Once you sign up for a particular site, you will be asked a number of questions such as your name, age, location, interests, marital status, and possibly a small section to write an â€Å"about me.† Many sites also encourage uploading a profile picture, and some allow you to add a â€Å"skin† or some type of multimedia to your profile. Creating a profile on a social network allows you to define yourself however you wish to be seen. You are able to share your views, and express your interests. Many people feel a sense of independence and self esteem from using these sites. Some people may even create a â€Å"second† life and get lost in an online world, completely losing track of reality. People become addicted to social networking, losing sleep over these sites, ignoring their work duties, or even their loved ones to update a status or check the latest â€Å"trending topics.† According to affilatenetworking.com, as of April 5th 2012, the top five social networking sites are: Facebook, with an estimated 800 million users; Twitter, with an estimated 175 million users; Linkedin, with over 115 million users; Google Plus, with an estimated 90 million users; and Pintrest, which is a brand new social networking site, but is already in the top 30 most visited websites in the USA. With these sites having so ma ny active users, it makes sense that they are prime places to advertise. These sites are users of â€Å"targeted marketing†, meaning that they use information provided by you, to decide which advertisements to show. Facebook for example, uses things you â€Å"like†Ã‚  to determine what ads to show in the sidebar. So if you liked a Facebook page for Thai food, the ad shown on your homepage may be a Thai restaurant that is close to your provided location. Along with your likes, Facebook uses your location, sexuality, and relationship status as means to advertise. ​Companies are not the only ones using the growing popularity of social networks to their advantage; celebrities and artists do as well. They do not normally place ads on the page, but rather make their own Facebook or Twitter for publicity and to share their work. Lady Gaga, for example, has 45,633,442 Facebook fans and 16,862,231 Twitter followers. She is one of the more popular celebrities in social media, but definitely not the only one. Among the rather interesting list of users are: Barack Obama, Kanye West, Megan Fox, and even Oprah Winfrey. By using these sites, public figures such as the aforementioned can communicate with their fans, and share photos and videos with them. They can also promote their latest campaign, music, or movie release. If a celebrity wants to promote a social cause, social media is also a helpful tool to gain supporters. ​Even though social media has many great characteristics and outcomes, there are also some drawbacks and concerns. For example, privacy issues. Facebook and MySpace make it very easy to retrieve personal information and harm someone. Phishing and scams occur often, by scammers who try to steal your personal information for fraud or identity theft. There are also websites that are made to look exactly like your favorite social networking site to steal your password. Once they have the password, they are able use it to send out spam, and even viruses, from your account, or destroy your profile. ​The most venerable victims of social media dangers are children. Predators can pose as children with the same likes and interests as the child, and trick that child into telling them almost anything, including where they live. The safety of a child is at risk when they are on any social networking site. Predators are the biggest danger for children, but there are also scams that affect them. There are hackers or scammers that target children to use their identity to open a credit card, since the credit of a child is always in good condition. ​The problems with social media do not end with people that we don’t know. They also cause problems with the people that are close to us. According to a survey by the American Academy of Matrimonial lawyers, one in five divorces in the United States involve Facebook, and 80 percent of divorce  lawyers have reported a spike in the number of cases that use social media for evidence of cheating (Gardner, David). The websites offer an outside source of communication that never existed in the past, allowing people to reconnect with past lovers or meet new ones. They also provide a distraction that takes away from the time that intimate couples are supposed t o share. ​Many employers also use social networks in their hiring process. If a person seeking a job has certain information, comments, or pictures on their page, it can comprise the decision of the employer. The Washington Post released an article stating that there are now background checking services that exclusively run social media background checks for companies all over the country (Duran). A reference to drugs or even inappropriate jokes in a status can completely change a company’s decision. ​There are also cases that take social media past the hiring process, and use it as a cause to fire someone that is already working for them. In Pennsylvania, a teacher posted a picture of herself dressed as a pirate, holding a plastic cup, with the caption under the picture reading â€Å"drunken pirate.† She was then fired for promoting underage drinking. Whether or not these charges were fair, the facts cannot be changed; social media is public. It’s something that anyone can see, including employers, children, students, and parent s (Duran). ​However, social media does not have to be feared or avoided. The more aware users are to the potential dangers, the better. As long as they are used correctly, social networking sites are a great way to interact. Avoiding them would just keep you from communicating and interacting in our society. They provide many useful tools, and an enjoyable way to keep in touch. ​ A social networking site is an online community in which people can connect to other with similar interests. Since their start in 1995 with Classmates.com, social networking sites have grown immensely to include huge websites such as Facebook, YouTube, hi5, and orkut.com (scribd.com). Through these sites, people can communicate, meet new friends, and share information and common values. Businesses can communicate with employees, advertise new products, speak to consumers about current products, and even get ideas for new or improved products. Social networks have changed the way we live today. They provide a means of being socially involved that never existed, and there is no telling how far they will take us, how long they will be around, or how much more they will grow. As a young adult, I can say that social media  affects my life on a daily basis, as it does millions of others’. We are living in an era of the Internet, and there is no turning back now.

Use of Reversed-phase HPLC (RP-HPLC)

Use of Reversed-phase HPLC (RP-HPLC) Introduction Reversed-phase HPLC (RP-HPLC) is one of the commonly used techniques in separation of a wide ranging of analyte based on differences in their structures. In RP-HPLC, the polar mobile phase and nonpolar stationary phase was practised. In this mode of HPLC, the analyte retains into stationary phase by hydrophobic interaction (Hanai, 1999; Swadesh, 2001). The surface area of nonpolar part of analyte molecules is more readily to bind to the RP-HPLC stationary phase. Thus, the less polar analyte will has longer retention time, whereas polar analyte elute more readily. Stationary phase and Column packing In RP-HPLC, the stationary phase is employing of alkylated silica gel column. In other words, the column is packing of nonpolar hydrophobic organic species (eg. octyl, octadecyl and phenyl groups). These hydrophobic organic species attached by siloxane bonds (-Si-O-Si-) to the silica surface (Corradini, Katz, Eksteen, Schoenmakers, Miller, 1998). C18 and C8 phase are most commonly used in the column of RP-HPLC. C18 phase is more hydrophobic as it has longer alkyl chain length which bonded to silica gel. C8 has shorter alkyl chain length compared to C18. It has less carbon attached on silica gel. Besides, phenyl group that bonded to silica surface develops the interaction of aromatic ring (Waksmundzka-Hajnos Sherma, 2011). Mobile Phase The organic solvent such as methanol and acetonitrile are most widely used as mobile phase in RP-HPLC. It is due to they have the characteristic of free of particles and UV transparency (Swadesh, 2001). In addition, acetonitrile, methanol and tetrahydrofuran also served as organic modifiers in RP-HPLC. According to Hanai(1999), the concentration of organic modifiers could alter the overall retention time of analytes. However, the relative changes in retention time are still depends on the properties of analytes (Hanai, 1999; Waksmundzka-Hajnos Sherma, 2011). Furthermore, isocratic and gradient elution also applied in RP-HPLC. In isocratic elution, mobile phase composition is remained constant throughout the elution. For gradient elution, the mobile phase composition is changed continuously throughout the elution. Gradient elution gives a better separation peaks for early eluters and sharper peaks for late eluters, but it need greater skills for method development (Ahuja Dong, 2005) . Detector There are many different spectrophotometric detectors that can be used in RP-HPLC. The main function of the detector in RP-HPLC is to trace and detect the presence of analyte components in the chromatography medium. These detectors are including ultraviolet-visible(UV-VIS) detector, diode array detector(DAD), chemiluminescence nitrogen detector(CLND), refractive index(RI) detector, mass spectroscopy(MS) and others (Swadesh, 2001). UV-VIS detector is the most popular detector among spectrophotometric detectors. Waksmundzka-Hajnos Sherma (2011) stated that UV-VIS detector is utilized by referring to interaction of electromagnetic radiation with analyte sample at the wavelength in the region of 190nm to 1100nm. A high sensitivity of detector is crucial as it also control the signal noise level and drift of the baseline. Applications RP-HPLC methods mostly used to detect known or unknown substances in sample for the quality control. It is applicable in food chemistry, forensic chemistry, pharmaceutical chemistry, toxicological analyses, herbal drugs analyses and others. 2.0 Determination of drug samples by RP-HPLC Reversed-phase High Performance Liquid Chromatography (RP-HPLC) has been generally and effectively utilised to determine numerous drugs samples. Dual wavelength detectors have been employed in the simultaneous investigation of two antispasmodic drugs, phloroglucinol (PG) and its methylated derivative tri-O-methylphloroglucinol (TMP), that are established as pain-relieving drugs when used in combination as they manage to suppress the catechol-O-methyl transferase, relax the smooth muscles, and decrease the abdominal pain induced by glycerol. Present method employing RP-HPLC successfully separate and quantify PG and TMP by using isocratic elution and dual wavelength technique. Apart from studying the injectable sample solution, the serum extracted from blood of healthy volunteers and degraded compounds have also been investigated in order to obtain a complete analysis. Plasma was first centrifuged out of the blood, deproteinated and stock sample was added into the serum obtained. Degrading agent and stress conditions of hydrolysis were used in aid to degrade the PG and TMP. It has been investigated that only oxidation degraded the molecule drastically. (Hasan et al., 2013) Cinitapride hydrogen tartarate has been also estimated by RP-HPLC. Cinitapride hydrogen tartarate is a new prokinetic drug, used as antiulcer agent of the benzamide by acting as an agonist of the 5-HT1 and 5-HT4 receptors and antagonist for 5-HT2 receptors. The preparation of sample solution for this work is simple, by just powdered the tablets and mixed with the mobile phase used. The retention time obtained for cinitapride hydrogen tartarate is 3.737 min. Method validation and optimization have been carried out to validate the findings. (Reddy, Shekar Murali, 2012) Simultaneous investigation of lisinopril and non-steroidal anti-inflammatory drugs (NSAIDs) has been employed in bulk, pharmaceuticals formulations and human serum by RP-HPLC. The major uses of lisinopril are treating hypertension and congestive heart failure, preventing renal complications caused by diabetes while NSAIDs (naproxen, flurbiprofen, diclofenac sodium and mefenamic acid) are primarily used for treatment of acute or chronic pain and inflammation. As there might be interactions between lisinopril and NSAIDs, these two compounds must be detected simultaneously. (Sultana, Arayne, Siddiqui Naveed, 2012) Paracetamol, grouped in non-steroidal anti-inflammatory drugs has been discovered by colorimetric and spectroflurimetric techniques and being realised that it can combine with other drugs and thus, determined singly by RP-HPLC. It has antipyretic, analgesic and weak anti-inflammatory action, generally administered to suppress violent pains in advanced cancers. It has been found out that as concentration of one of mobile phases, ACN is high, paracetamol undergone improper dissolution. Meanwhile, phenomena such as broadening, fronting and tailing were remarkably lessened as ACN concentration gradually decreases. (Devi et al., 2013) Due to the rapid growth of demanding of NSAIDs, it is essential that to determine not the NSAIDs only, but also their combination drugs. The main function of NSAIDs is said to be inhibited cyclooxygenase in vitro and in vivo, hence decreasing the synthesis of prostaglandins which mediate the inflammation. Fifteen drugs have been simultaneously examined by robustness approach, including aceclofenac (ACF), aspirin (ASP), diclofenac (DCF), etoricoxib (ETC), ketorolac (KTL), paracetamol (PCM), salicylic acid (SA), ibuprofen (IBF) and naproxen (NPX) while the combination drugs being studied are clopidogrel (CLP), thiocolchicoside (THC), dextromethorphan (DXM), moxifloxacin (MXF), chlorpheniramine maleate (CPM) and domperidone (DOM). By varying the method parameters, effect on chromatographic separation of all the drugs can be investigated. (Patel, Samanthulam Shrigod, Modh Chaudhari, 2013) Olmesartan medoxomil is an effective antihypertensive reagent, functioned as inhibitor that prevents the angiotensin II from binding to the AT1 receptors in vascular muscle. The validated analytical method for the Olmesartan medoxomil determination in the presence of its degraded product in bulk drug has been established. The degraded products are formed under the conditions suggested by International Conference of Harmonization (ICH), which are acid hydrolysis (0.1M HCL), alkaline hydrolysis (0.1M NaOH), oxidation (30% H2O2), photolysis (UV), and thermal degradation under stress conditions. The sample was found to be highly susceptible to acid and alkaline hydrolysis and oxidation while for other conditions, no degradation was performed. (Hamrapurkar Gadapayale, 2013) Quantitative determination of oseltamivir phosphate (OSP) has been exercised by RP-HPLC. OSP is the drug to treat swine flu, prevents the virus from releasing by infected cells by selectively blocks the viral surface enzyme neuraminidase. Oseltamivir phosphate is also the drug of choice for treatment of avian influenza that diagnosed to be caused by H1N1 virus. This quantitative method was statistically validated for linearity, precision, accuracy, ruggedness, robustness and sensitivity. (Malipatil, Jahan Patil, 2011) 3.0 Determination of food samples by RP-HPLC Reversed-phase High Performance Liquid Chromatography (RP-HPLC) has been widely used to determine the food samples. Honey is a food sources which consists of supersaturated solution of sugars (mostly fructose and sucrose) and other significant amount of minor compounds such as organic acids, furanic aldehydes and acids, enzymes, amino acids and proteins, mineral and water-soluble vitamins. The characterization of these minor compounds have been known to be a reliable tool to determine the botanical an geographical origin as well as the quality of the honey. Many methods have been launched out for the determination the minority organic compounds such as furanic aldehydes and acids but less for vitamins in honey. So, a new analytical method was proposed which utilize RP-HPLC to determine the presence of five water-soluble vitamins in honey that are vitamin B2 (riboflavin), vitamin B3 (nicotinic acid), vitamin B5 (pantothenic acid), vitamin B9 (folic acid) and vitamin C (ascorbic acid). Variety of validation parameters have been carried out in this proposed method in term of detection and quantificat ion limit, linearity, precision, sensitivity as well as the bias to validate their findings (Ciululu et al., 2011). In fact, due to the higher concentrations of saccharides, slightly acidic condition and water activity as well as the presence of organic acids in honey, it favor the formation of furanic aldehydes especially 5-hydroxymethyl-2-furaldehyde (HMF). Hence, HMF is a good parameter for determine the quality of the honey. Apart from this, 2-furaldehyde, 2-furoic acid, 3-furaldehyde and 3-furoic acid also has been quantified in honey samples. Hence, 5-hydroxymethyl-2-furaldehyde (HMF), 2-furaldehyde (2-F), 3-furaldehyde (3-F), 2-furoic acid (2-FA) and 3-furoic acid (3-FA) has been investigated simultaneously and completely validated on 18 honey samples which different in their age, botanical and geographical origin by RP-HPLC. From the result, HMF was quantified in all samples. 2-F and 2-FA was showed in almost half of the samples whereas 3-F was detected in three honey samples and 3-FA in only one. Validation parameters were performed in term of detection limits, precision, linearity and ac curacy (Spano et al., 2008). Brominated phenols have been known to have strong odor properties and act as key flavor compounds in seafoods. The presence of the bromophenol compounds, their concentration and the marine environments controlled the different in the strength and characteristic of odor and flavor in seafoods. Hence, RP-HPLC was employed to determine the presence of simple bromophenols in marine fishes simultaneously which include 2-bromophenol (2-BP), 4-bromophenol (4-BP), 2,4-dibromophenol (2,4-DBP), 2,6-dibormophenol (2,6-DBP) and 2,4,6-tribromophenol (2,4,6-TBP). All the bromphenols have been extracted from the fish samples by combined steam distillation-solvent extraction (SDE) with 2mL of pentane/diethyl ether (6:4) and identified by RP-HPLC with UV-detection. (Silva et al., 2005) Nowadays, the employment of food additives in the production of processed and fast foods was gradually increasing throughout the world. However, illegal and excess addition of food additives can cause significant health problems were well known by community. For an example, in china, the ministry of Health of the People’s Republic of China strongly prohibited the addition of acesulfame, saccharin, neotame, stevioside, benzoic acid, caffeine and dehydroacetic acid as well as regulated the addition level of sorbic acid to 0.2g/kg into red wine. Variety of methods is available to determine the food additives present in food and drinks. However, simultaneous determination of large amount of food additives in red wine which mentioned as above was proposed by using dispersive solid phase extraction (dSPE) followed by RP-HPLC with ultraviolet (UV) detection in this study. The red wine samples were undergoes the dSPE methods which considered as most powerful cleanup technologies in re moving various matrix and then analyzed by RP-HPLC with UV detection. Different kinds of validation parameters were utilized to determine the satisfaction and accuracy of the results. Apart from this, amino-functionalized Fe3O4 magnetic polymer (MP) which coupled with tetraethylenepentamine (TEPA) also proved that it is an efficient absorbent in dSPE extraction procedure which could eliminate most of the interferences in the red wine. (Zhao et al., 2013) Apart from this, the dosage of additives especially preservatives, is the most strictly controlled by EU law because of their potential risk to human health and safety. Nationally and international authorities have been established the guidelines for the usage of preservatives in food and foodstuff which about the maximum dosage, use conditions and type of food in which they can be used. In our daily life, the most common preservatives are sorbic acid, natamycin and lysozyme. So, analytical method for simultaneous determination of the four preservatives in different kinds of cheeses that are sorbic acid, natamycin, lysozyme and benzoic acid by single RP-HPLC was established. Benzoic acid was also included into the determination step is because it can be synthesized naturally from the microbial metabolism even it’s not added technically to cheese during production. All preservatives were extracted from the samples through a simple extraction step and then separated by RP-HPLC. Finally, the analytes were analyzed by a single wavelength UV detector (280nm) and even a triple wavelength UV detector (227nm, 280nm and 303nm) for a more sensitive determination. (Guarino et al., 2011)

The Effects of Divorce on Children :: essays research papers

The Effects of Divorce on Children Divorce is a process that many people in America go through. The divorce rate continues to escalate over the years. Divorce is a serious problem, it is a gradual process that ultimately results in families breaking up. There are various factors in which a marriage can fail and end up in divorce. Some skip the step of trying to reconcile things and make it work. In some cases it is easy for a divorce to take place. For instance, in cases where both parties are in agreement and have no children it is easier to handle a divorce. But in the cases where children are present, what happens to the kids? Both parents are at each others throats or one is devastated from the rejection, what role does the child play? It is a hard thing to cope with as an adult imagine as a little one or even a teenager, it affects them in more ways than anyone can imagine. It can affect them both physically and emotionally. The effects of divorce are immense, it permanently weakens the bond or relationship betwe en a child and his parents. Can lead to them reaching out or looking to others for attention, causing poor attitudes, low self esteem, dropping grades, loss of virginity, use of drugs and or weapons, or in some cases mutilation of the body. There are various effects that children have to deal with that maybe extremely hard to cope with. One parent may say one thing yet the other disagrees and makes it impossible for the child to have a stable relationship with both of them. Children need both biological parents at their side to be guardians and counselors in their lives, to be examples of what they need to do to become outstanding citizens in our community.

The Foundations of Whiteheads Philosophy of Education :: Science Learning Papers

The Foundations of Whitehead's Philosophy of Education The inspiration for this paper comes from the Fiftieth Anniversary of the death of Alfred North Whitehead and the theme of this Congress. In Aims of Education, Whitehead describes the role of freedom and limitation in the educational process. The foundations of these concepts, and important clues to their application, can be found in his general metaphysical framework outlined in Process and Reality. Positive and negative prehensions seem to be the model for freedom and limitation; hence, the latter concept implies the discipline of subjective aim. This analysis supports an interpretation of the mutual complementarity of freedom and discipline, with obvious applications to the educational process. Published initially in 1929, Alfred North Whitehead's The Aims of Education is certainly not a new book. However, since last year marked the 50th anniversary of Whitehead's death as well as my preparations for this World Congress, the general theme of which is "paidaia," it seemed the fitting moment to reread this classic and reflect once more upon its inspiring insights and timeless wisdom. The Aims of Education is really a set of essays first composed as lectures. Whitehead delivered these lectures at Cambridge, England, and at Harvard University between the years 1912 and 1928. His stated purpose was to "protest against dead knowledge." (AE, v) Perhaps these protests ought to continue into our own generation, but I hesitate. I am afraid that one of the casualties of any success in such protests might well be Whitehead himself, for the abstract, general nature of his thought has always been a challenge to professional philosophers and nearly incomprehensible to young philosophy stu dents. Nevertheless, pondering Whitehead's thought has always been, in my opinion, well worth the effort for those who persevere. The third chapter of The Aims of Education, entitled "The Rhythmic Claims of Freedom and Discipline," is where I find the essence of Whitehead's educational philosophy. This philosophy, I shall argue, is simply a reiteration in educational language of the core principles of his general philosophy as stated in Process and Reality and in Science and the Modern World. Let us begin with the term "value." Science and the Modern World provides us with an earlier interpretation of this notion. Here Whitehead explains that "'Value' is the word I use for the intrinsic reality of an event." (SMW, 93) Now an "event" for Whitehead constitutes a fundamental datum of reality.

Who Is Most To Blame For Macbeths Downfall? :: essays research papers

Who Is Most To Blame For Macbeth's Downfall? I have chosen to write my essay about the cause of Macbeth's downfall. I believe Macbeth had an immense build up of hatred inside him waiting to be released. I will discuss the possible factors that could have placed the final straw on the camel's back and lead to the releasing of brave soldier Macbeth's bloodthirst, and why he committed the acts he did. The first suspects are the witches. After all it was their voices that implanted the thoughts into Macbeth's head that he would be king. When Macbeth heard this, he figured that no matter what he did he would become the king. After hearing King Duncan's desire to have Malcom carry on the throne, Macbeth quickly lost faith that he could achieve the throne without doing anything, so he took it upon himself to make things happen. After killing Duncan he feared Banquo for his knowledge of the witches prophecies and had him killed as well. Macbeth seemed to be losing himself after Duncan's death due to his obsession with the witches prophecies, so in turn, the witches could be partly responsible for Macbeth's downfall. Lady Macbeth can also be held accountable for Macbeth's decline of sanity and power. Although it didn't take much, her persuasion lead to the killing of Duncan. She wanted Macbeth to take the rank of king as much as he did. Pressure from his spouse added on to all the other pressures from the prophecies, also helped tempt Macbeth to murder. Not only did her doings contribute to Macbeth's turmoil, but it also lead herself to become mad. The character most guilty of Macbeth's physical downfall would have to be Macduff. He was the one that actually removed Macbeth's head from his spine. Also when Macduff left, Macbeth became more ensnarled by his anger and responded by prooving himself a cold hearted savage when he had Macduff's innocent wife and children slaughtered. Out of all the external elements that affected Macbeth's downward spiral, I believe Macbeth himself was the most to blame. It was his weak conscience that was so easily molded. He always had a choice as to what he would do, and more often then not he chose the wrong path. In the end it all caught up to him, and

Natural and Sexual Selection of Vestigial and Wild Type Drosophila Melanogaster

Natural and Sexual Selection of Vestigial and Wild Type Drosophila melanogaster Abstract In this experiment, vestigial flies as well as wild type flies were used to create some diversity as well as test one of our hypotheses. Our hypotheses are as follows; 1) The wild type flies will have a greater relative fitness compared to the vestigial flies based on only sexual selection. The wild type has a relative fitness of 1 since it has fully functional wings. Vestigial Winged flies are not as sexually appealing since their wings are not functional and the wing movement is a vital part of their mating ritual. ) The vestigial fly will have a greater relative fitness when considering both sexual and natural selection. With the presence of natural selection (fly paper hanging from top of cage) posing a larger threat to the wild flies b/c they can fly better, this will allow vestigial flies to prosper better. To set up this experiment, two twenty-five gallon aquariums, 3 petri-dishes, 200 fli es, rotten bananas, and yeast were used. It was decided that there would be 80 vestigial flies and 20 wild type flies to total to an initial population of 100 drosophila.In the sexual selection circumstance, the vestigial drosophila’s carrying capacity is somewhere around 80 individuals, which is consistent with the wild type drosophila’s carrying capacity in this circumstance (Figure 4). In the sexual and natural selection circumstance the wild type drosophila have a carrying capacity at approximately 100 individuals (Figure 5). As both of the p-values from each circumstances in our experiment are greater than 0. 05, both hypotheses must be refuted. IntroductionThis experiment focuses specifically on Drosophila melanogaster, also known as the common fruit fly (Lynch, M. , et al. pp 645-663). For over 100 years scientists have been using them in experiments as they are referred to as a â€Å"model organism. † They were deemed a â€Å"model organism† since they are characterized as having a large reproductive capacity, a medium size, a short generation time, and are inexpensive to keep alive. Fruit flies only consume yeast growing on rotting fruit. Sixty-one percent of human genetic diseases have been found in fruit flies, they also share many similar genes with humans.The male fruit fly spends most of his time chasing after and singing to female flies with hopes of mating with her, they are successful about once a day (Stowe, K. 2008). The male fruit fly frequently sticks out one wing or the other which is accompanied by its vibration, producing a â€Å"love song† that can be recorded with specialized microphones (Hall, Jeffrey C. , pp 1702-1714). To distinguish male drosophila from females, there must be a distinctive black spot on the distal end of their abdomen for it to be a male, the females do not have this black spot.In this experiment, vestigial flies as well as wild type flies were used to create some diversity as we ll as test one of our hypotheses. Vestigial flies do not have well functioning wings, however wild flies do have functioning wings. Within this experiment, degrees of natural selection, sexual selection, and a combination of both were tested on the two types of flies. Natural selection is survival of the fittest. Sexual selection is the ability of organisms to choose their mates depending on their species. Relative fitness is the ability of an organism and species to survive and produce fertile, successful offspring.Purpose of our experiment is to determine the effect of natural selection on two subspecies coexisting under similar circumstances. Our hypotheses are as follows; 1) the wild type flies will have a greater relative fitness compared to the vestigial flies based on only sexual selection. The wild type has a relative fitness of 1 since it has fully functional wings. Vestigial Winged flies are not as sexually appealing since their wings are not functional and the wing moveme nt is a vital part of their mating ritual. 2) The vestigial fly will have a greater relative fitness when considering both sexual and natural selection.With the presence of natural selection (fly paper hanging from top of cage) posing a larger threat to the wild flies b/c they can fly better, this will allow vestigial flies to prosper better. Materials and Methods To set up this experiment, two twenty-five gallon aquariums, 3 petri-dishes, 200 flies, rotten bananas, and yeast were used. The bananas chosen to be an accelerant for the growth of the yeast and  were frozen so they would be easier to cut. The yeast was used because the drosophila melanogaster prefer this as a food source.The vestigial and wild type flies were sexed (to determine their sex), sorted, and counted. An initial population size of 100 total flies was decided so that it would be easier to determine the phenotypic percentage of the total population. Fly paper was placed in one of the sets of cages to impose a m ethod of natural selection as well as the sexual selection which is being solely tested by the other set of cages. It was decided that there would be 80 vestigial flies and 20 wild type flies to total to an initial population of 100 drosophila.Next, the flies were anesthetized flies using Fly Nap. The flies were counted out to reach desired ratio, sexing the flies making sure there are equal amounts of males and females to be sure there is ample individuals to allow successful mating. The fly’s food was prepared by taking a frozen rotten banana, cutting it in half, mashing up the banana meat, and mixing yeast into it. The bananas were then cut into halves horizontally (six halves total in each cage) and split down the middle length wise leaving the peel on the banana, revealing the yeast-banana mush and placed into the petri dishes.The petri dishes were then arranged into a horseshoe shape in the bottom of the aquarium. Next, the allele frequencies were determined by using th e hardy Weinberg equation (p2+2pq+q2). This experiment will prove our hypotheses sufficiently if carried out correctly by changing the total populations of the subspecies of each fly. Since the vestigial flies do not fly they will be affected by sexual selection only. However, the wild type flies will be affected by sexual and natural selection.The outcome that is predicted is that the relative fitness of the vestigial flies will stay low in the sexual selection circumstance and they will prosper in the sexual and natural selection circumstance since they do not fly and are not able to come near the fly paper posing as the natural selection. Also, the wild type flies will remain at a high fitness level in the sexual selection, but a low fitness level in both sexual and natural selection circumstance. Table 1: General Data from Sexual Selection| Generation| Sexual Selection Only| Total Drosophila| Wild Type| Vestigial| | 0| 20| 80| 100| 1|   |   |   | 2| 6| 12| 18| 3| 338| 50| 388| 4| 201| 21| 222| 5| 428| 35| 463| table 1: shown in this table is the initial data of the total count of flies captured for counting in each species each week/generation in the sexual selection group. | Results Table 2: General Data from Natural and Sexual Selection| Generation| Natural and Sexual Selection| Total Drosophila| Trapped Wild Type Flies| | Wild Type| Vestigial| | | 0| 20| 80| 100| 0| 1|   |   |   |   | 2| 16| 59| 75| lots| 3| 23| 10| 33| lots| | 86| 1| 87| lots| 5| 114| 21| 135| Lots| table 2: shown in this table is the initial data of the total count of flies captured for counting in each species each week/generation in the group that was exposed to natural selection as well as sexual selection. | Table 3: Anova: Single Factor, natural selection |   |   | Source of Variation| SS| df| MS| F| P-value| F crit| Between Groups| 63202. 5| 1| 63202. 5| 3. 513094| 0. 09775| 5. 317655| Within Groups| 143924. 4| 8| 17990. 55| | | | | | | | | | | Total| 207126. 9 | 9|   |   |   |   | | | | | | | |Table 3: Shown in this table is the ANOVA calculation which determines the probability that our null hypothesis will be found true. In this case, the proability of that happening is approximately 0. 09 or 9%. This number is low enough to allow us to accept our hypothesis. | Table 4: Anova: Single Factor natural and sexual selection|   | Source of Variation| SS| df| MS| F| P-value| F crit| Between Groups| 774. 4| 1| 774. 4| 0. 486447| 0. 505277| 5. 317655| Within Groups| 12735. 6| 8| 1591. 95| | | | | | | | | | | Total| 13510| 9|   |   |   |   | | | | | | | Table 4: Shown in this table is the ANOVA calculation for the Natural and Sexual selection grouping of drosophila and the possibility of our null hypothesis occurring. In this case, the value is approximately 0. 5, or 50%. This proves that our hypothesis is not completely reliable. | In â€Å"generation 0,† for the sexual and natural selection set of flies, the total sampl e size is 100 flies consisting of 20 wild type (10 male, 10 female), and 80 vestigial (40 male, 40 female), there were no flies stuck on the fly paper yet.The allelic frequency: p=0. 048, p= 0. 961. For the sexual selection set of flies, the total sample size is 100 flies, consisting of 20 wild type (10 male, 10 female), and 80 vestigial (40 male, 40 female), the allelic frequency is p= 0. 78, and q=0. 22. The dominant trait is denoted by the letter â€Å"p† (wild type), and â€Å"q† denotes the recessive (vestigial). After five generations were allowed to pass, the final total of drosophila in the sexual selection group included 428 wild type and 35 vestigial out of 463 total drosophila(Table 1).After five generations were allowed to pass, the final total of drosophila in the sexual and natural selection group included 114 wild type and 21 vestigial out of 135 total drosophila (Table 2). There is an obvious and drastic decrease in the amount of flies after the five ge nerations passed when comparing the two separate groups. Also, it must be pointed out that the set of data does not have values for the first generation because when the flies were counted, the collection of flies to count was unsuccessful.Next, the p-values of each set of data were calculated by using the ‘ANOVA: Single factor’ function in Microsoft Excel. The p-value of the sexual selection only set of data came out to be 0. 097, or 9. 7% that our null hypothesis that the vestigial flies would be more fit than the wild type flies would come true (Table 3). In Table 4, it is shown that the calculated p-value for the sexual and natural selection conditions of the vestigial and wild type flies produced a value of 0. 1, or 51% that our null hypothesis would come true. Figure 2 shows the data collected in the sexual selection circumstance of both the vestigial and wild type drosophila as well as the total population as to compare visually the drastic contrast between the t wo subspecies. The wild type flies remain more successful than the vestigial flies. Figure 1: In this figure, it is shown visually the differences in the numbers of flies counted per each subspecies of drosophila while under only sexual selection conditions.Figure 3 shows the Natural and sexual selection circumstance’s effects on the populations of both vestigial and wild type flies as well as the total number of flies in the enclosure. The Vestigial flies start off more prosperous than the wild type flies, but then the wild type drosophila regain their success and start reproducing at incredible rates. Figure 2: In this figure, it is shown visually the differences in the numbers of flies counted per each subspecies of drosophila while under both natural and sexual selection.Figure 4: In this figure, the relative fitness and carrying capacity of each subspecies is shown. Figures 4 and 5 have been included to compare fitness levels of each of the fly subspecies. The scale on t he y-axis has been multiplied by 10 to better understand the incredible contrast between the species. In both circumstances, the vestigial drosophila starts out with a higher relative fitness then reaches an equilibrium level with the wild type flies and they switch dominance of their relative fitness.Figure 5: In this figure, the relative fitness and carrying capacity of each subspecies is shown. Discussion This curvature of the graphs and intersections happen because when the subspecies reach their carrying capacities, they must make a change so that they can survive as a community. In the sexual selection circumstance, the vestigial drosophila’s carrying capacity is somewhere around 80 individuals, which is consistent with the wild type drosophila’s carrying capacity in this circumstance (Figure 4). In the sexual and natural selection ircumstance the wild type drosophila have a carrying capacity at approximately 100 individuals (Figure 5). As both of the p-values fr om each circumstances in our experiment are greater than 0. 05, both hypotheses must be refuted. It is suggested that this experiment is conducted again using a better enclosure for the flies. During the semester, countless flies were flying around the lab which could account for the numbers of flies being inaccurate. There are possible errors in the sexing as well as the counting of the flies.Only a few flies crawled into the tubes with apple cider vinegar, and didn’t allow for every fly to be accounted for. The temperature of the lab was often quite cold, therefore this could account for some of the flies dying. As temperature was not a factor we were testing in this experiment, the temperature should be kept at a constant level. This experiment is important on a global level because of the closeness in the similarities of the genes between the drosophila and humans (Lynch, M. , et al. pp 645-663).This experiment shows us how, if humans were meant to survive strictly on nat ural and sexual selection, that mutations would play a part in the selection of mates. References Hall, Jeffrey C. Jun 1994. The Mating of a Fly. Science 264 No. 5166: pp 1702-1714. Lynch, M. , J. Blanchard, Houle, D. , T. Kibota, Shultz, S. , L. Vassilieva, Willis, J. Perspective: Spontaneous Deleterious Mutation. Evolution 53 No. 3: pp 645-663. Stowe, K. A. , L. L. Hester, and Vieyra, M. L. 2008. Biology 101 Lab Manual. Hayden- McNeil Publishing Inc. , Plymouth, Michigan, USA.