The history and development of television Essay

The history and development of television - Essay Example The word television was coined by a Russian scientist Constantin Perskyi in a paper he presented at the International Electricity Congress at the International World Fair in Paris on August 25, 1900. Even before that, Paul Gottlieb Nipkow, a German student, had patented the first television in 1884. It was a electromechanical device based on the photoconductivity of the element Selenium and Nipkow’s spinning disk with a series of holes of equal diameter drilled into it at equal distances. In the camera unit, as the disk spun in front of the object, each hole produced a scan line which was captured by a light detecting device behind it. The scan line was transmitted by radio wave to the reproducer or receiving unit. This basic television and other refinements that came after it were however restricted to transmission of still images and silhouettes. It was only on October 2, 1925 that the Scottish scientist John Logie Baird, who took the lead in development of the electromechan ical television, achieved live transmission of moving half-tone images in his laboratory. Baird’s endeavour took the electromechanical television through a continuous phase of technical development ranging from the first transatlantic transmission between London and New York by his company in 1928, the first transmission between shore to ship, demonstratin of the first electromechanical colour, infrared and stereoscopic television to the first live transmission, of the Epson Derby in 1931 and demonstration of the ultra short-wave television in 1932.

Monarch Butterfly Research Paper Example | Topics and Well Written Essays - 2500 words

Monarch Butterfly - Research Paper Example Butterflies and moths belong to the order, Lepidoptera (Capinera, 628). The special characteristics of this order are the presence of a â€Å"complete, holometabolous life cycle, with separate egg, larva, pupa, and adult stages† (Capinera, 631). And this is why butterflies are classified under this order. A Monarch butterfly has also a similar wing span which comes to â€Å"3.5 to 4 inches† (Garber, 76). Another common feature of the members of Lepidoptera order is that all of them have â€Å"four wings and also scales covering at leats some body parts (Capinera, 631). In Monarch butterflies, the scales are seen â€Å"as a patch near the central veins of the hindwings† (Capinera, 631). There are two subspecies in Monarch butterfly (Oberhauser and Solensky, 1). The species, Danaus plexippus plexippus, is found in â€Å"Southern Canada, the USA, Mexico, most Caribbean Islands, Central America and northern South America† (Oberhauser and Solensky, 1). The sec ond subspecies, Danaus plexippus erippus is seen in â€Å"Peru, Bolivia, Chile, Argentina, Uruguay, Paraguay and Eastern Brazil† (Oberhauser and Solensky, 1). Monarch butterflies are cold-blooded insects (Learner.org). So they are comfortable in cool climates as in such an atmosphere, they do not need to spend much energy (Learner.org). It can be seen that â€Å"the body of the caterpillar will be covered with nine brown rings aside from black head and it features three pairs of ‘true’ legs with claws attached and five pairs of prolegs that extend backwards† (Monarch-Butterfly.com). To differentiate a female monarch butterfly from a male, one has to look for a simple identification mark -â€Å"the male monarchs have a black spot on each of the hind wings over a vein. The female monarch butterfly does not have this spot† (Monarch-Butterfly.com). In one year, four generations of monarch butterflies complete their life cycle (Monarch-Butterfly.com). Th e life cycle of a monarch butterfly on the other hand includes four stages, namely, the egg, the larvae, the pupa and the butterfly (Monarch-Butterfly.com). The annual life cycle of this majestic insect can be considered to begin in the months of February and March when they mate (Monarch-Butterfly.com). After mating, the butterflies migrate to the Northern and Eastern parts of North America and lay their eggs there in the months of March and April (Monarch-Butterfly.com). It is on the milkweed plant that the Monarch butterflies lay their white eggs (Monarch-Butterfly.com). The eggs will be seen on the undersides of milkweed leaves, usually near the top of the plant. Each female butterfly lay â€Å"several hundred eggs† and the eggs hatch in four days (Monarch-Butterfly.com). There are many invertebrate predators that feed on Monarch eggs and larvae like, red velvet spider mite (Oberhauser and Solensky, 6). The caterpillar is herbivore and feeds only on milkweed leaves for tw o weeks and then attach to a small stem or a leaf of the plant and starts metamorphosing into the pupa stage (Monarch-Butterfly.com). Because of the insistence of the caterpillars on eating only the milkweeds, Monarch butterflies gained another name, the â€Å"milkweed butterfly† (Monarch-Butterfly.com). The caterpillars are only â€Å"about 0.1 inches long† weighing 0.55 grams (Monarch-Butterfly.com). Caterpillars have alternating bands of yellow, white, and black, on their body with a black stripe between pairs of

The Abuse of Freedom of Speech

The Abuse of Freedom of Speech Freedom of Speech, one of Americas downfalls. One of the biggest misconceptions now a days is that many of todays generation has exercised their freedom of speech inappropriately. They have cruelly misused and abused it by using it as an excuse to be discriminative, unpleasant, and barbarous.42% of teenagers with tech access report being cyber bullied over the past year, this is because technology has created a generation that have gained the wrong kind of confidence from behind a computer or cell phone screen. Social media outlets and many other sources have become a crutch for allowing this corruption of what we call one our Constitutional Rights. Yes America has the right to express its freedom, but does that mean we have to cruel and malicious when we become upset? When it come to expressing opinions, people now have no problem with doing so. Whether that be over a cellphone, computer, through mail, or in person, America never fails to get it their point across. This comes with many downfalls, these methods may be effective, but sometimes people can get caught in the crossfire. For example in 2007, Katherine Evans a senior at Pembroke Pines Charter High School exerted her freedom of speech. Evans disliked one particular teacher that she decided to create a facebook page trashing her. Yes, Evans did create the page off campus, and it didnt involve any threatening or vulgar words, but it isnt ethically right. Did this teacher really deserve this hurtful defamation? Also many websites are aiding and protecting these freedom of Speech abusers in certain cases, with their terms of use and policies leaving various ways to hurt people. The faster, easier, and cheaper it becomes to communicate and connect with people, the more effortlessly we will abuse our freedom of speech and expression. For instance spreading vile rumors that could ruin someones reputation can now be done within a matter off seconds. 2.8% of students report that they have had harmful information spread about them. This kind of quick-fire approach to spilling our opinions has created a culture of criticism. Today seven-in-ten Americans use social media to connect with one another Thats a large portion of America taking part in a society thats rapped up in judging others and crossing boundaries of our constitutional rights. Social media sites have received lash back for allowing users to post offensive post about other people onto their sites. Also social media is now creating more ways to attack people, ANONYMOUSLY! More and more apps are being created to use anonymously. This only encourages the abuse of freedom of speech. To top it all off, its all public and there for everyone to see. Freedom of speech is scaling heights everyday with disregard of the consequences of misusing it. Posting pictures without someones permission has gotten out of control. Some are not meant maliciously, but theres some that can destroy opportunities for a person. This is a result of one of many ways we misuse our right to freedom of speech. We have engulfed ourselves into our virtual lives that we forget there are consequences to our actions, when we post something about someone. Once its uploaded, its now forever in the World Wide Web. There are many instances of teenagers that have posted pictures of others and that other person has suffered severe repercussions because of it. Our perceptions of right and wrong have been swayed because too many people abuse the right to express their opinions, by attacking innocent people, and those undeserving of others criticism. There are many consequences to misusing freedom of speech, such as people who have committed suicide, or attempted suicide. Every year 864,950 people attempt suicide. This mean one person tries to commit suicide every thirty-eight seconds because people have the liberty to express their opinion whether that be good or bad. Of the 69% of teens that own technology, 80% are active on social media. This is a large portion of our youth and future leaders. Celebrities, politicians, authors, normal everyday people, are exposed to cruel and perverted individuals who believe that they can say whatever they want. Various mainstream issues such as racism, feminism, and equal pay are being fueled by people who are ignorant to culture, because they feel the need to express what they believe despite being politically incorrect. Yes Freedom of speech gives us the right to verbally express how we feel, but not to degrade, humiliate, curse, and abuse people. Four-in-ten Millennials say the government should be able to prevent people from publicly making statements that are offensive to minority groups. Many people may disagree with government censoring, but consider all the suicides, attempted suicides, riots, that all could be avoided. The integrity of Americas freedom of speech has been compromised. Freedom of speech has been misused, abused, and thrown around, like trash. For the sake of Americas youth and future generations there needs to be change. America cannot continue to allow such verbal attacks to ensue on undeserving people or on social media. Society should start respecting freedom of speech. People think before speaking or typing, show empathy, see past what you disagree. Make a change in the nation for the better.

Macbeth: A Noble and Highly Respected Figure In Ducans Reign :: Macbeth essays

Macbeth: A Noble and Highly Respected Figure In Ducan's Reign Macbeth was a noble and highly respected figure in King Duncan's reign. He lived a brave and honest life, serving the King and his country against evil. The Tragedy of Macbeth occurred when the weird sisters met Macbeth for the first time. An evil mind took over Macbeth, and he was doomed to the witches prophesies until his death. Macbeth was a General of the King's army, and served the King with honor and dignity. After success in the battle against the Thane of Cawdor, which was Macbeth's final serving for King Duncan, Banquo and he met with the King. Banquo was commended, and "To make thee full of growing. - Noble Banquo" (Act 1 Scene 4); but Macbeth was given all the credit, and titled "My worthy Cawdor!" (Act 1 Scene 4), Thane of Cawdor for his service. It was during this scene, where Duncan announced Malcom as his future successor, that Macbeth's thoughts became evil obsessions. A power was taking over him, his own flaw from evil, brought about by the weird sisters. "Stars, hide your fires, Let not the light see my black and deep desires." (Act 1 Scene 4). Macbeth's flaw is highly influenced by his wife, Lady Macbeth, who has wicked thoughts, and persuades Macbeth into many actions he would not normally do. "Only look up clear: To alter favour ever is to fear. Leave all the rest to me" (Act 1 Scene 5) shows her strength over Macbeth. As Macbeth prepares to kill Duncan, he hallucinates, and many thoughts cross his mind, but when the bell sounds, "Hear it not, Duncan, for it is a knell That summons thee to heaven or to hell." (Act 2 Scene 2) and Macbeth acts promptly. After the murder Macbeth regrets his actions, but again Lady Macbeth is influential toward him, reminding his that "These deeds must not be thought After these ways; so, it will make us mad." (Act 2 Scene 2). Macbeth's true self again break through when he has false thoughts about his actions. "Had I but died an hour before this chance I had lived a blessed time; for, from this instant, There's nothing serious in mortality. All is but toys; renown and grace is dead, The wine of life is drawn, and the mere lees Is left this vault to brag of." (Act 2 Scene 4). All the confusion surrounding Macbeth has prompted him to make some errors. He did not place the daggers on the guards after the murders, and then before anybody was able to talk to the

Chobani Case Study Essay

1) From the information about Chobani in the case at the start of the chapter, (a) whom did Hamdi Ulukaya identify as the target for his first cups of Greek yogurt and (b) what was his initial â€Å"4Ps† marketing strategy? a. Hamdi Ulukaya first targeted young and fit Americans with his first cup. b. Hamdi Ulukayas initial â€Å"4Ps† marketing strategy involved product, price, place, and promotion. For product, he focused on the packaging. Made the cup with bright colors so people would be attracted to it. For price, he went straight to the retailers instead of going through distributers. He decided to sell this at every conventional yogurt aisle of traditional supermarkets in America. The last â€Å"P† is promotion and at first the only advertisement they had was word of mouth. Eventually they got money and used traditional advertisement, social media, and direct communication with the customer. 2) (a) What marketing actions would you expect the companies selling Yoplait, Dannon, and PepsiCo yogurts to take in response to Chobani’s appearance and (b) how might Chobani respond? a. What I would expect from these three yogurts is for them to rethink the â€Å"4Ps†. I believe they will focus on how they are promoting their product and also how the product looks. b. I think Chobani will respond with something better in both promoting and how the product looks due to Chobani setting the new standard of the product. 3) What are (a) the advantages and (b) the disadvantages of Chobani’s Customer Loyalty Team that handles communication with customers-from phone calls and emails to Facebook and Twitter messages? a. Advantages Keeps the company updated with new product ideas The communication is faster with having this specific team b. Disadvatages Could be too slow to read and respond to every email and message 4) As Chobani seeks to build its brand, it opened a unique retail store in New York City: Chobani SoHo. Why did Chobani do this? Chobani did this to explore what type of new markets and products they could find in the U.S. They are trying to find the people that like flavors that are very unique. For example, pistachios and chocolate yogurt. 5) (a) What criteria might Chobani use when it seeks markets in new countries and (b) what three or  four countries meet these criteria? a. The Criteria Chobani might use when seeking new markets is flavor, price, and cultural differences. I believe the flavor can’t to be too crazy, it has to be somewhat a little similar to American. The price has to be affordable to the average man. What I mean about the cultural differences is similar to what I said about the flavor, it can’t be something completely different to what Americans are used to here in the U.S. b. I believe this criterion fits Canada, Ireland, and Mexico.

Advanced Electrolyte System Essay

BENEFITS 1.Replenish fluid losses 2.It helps in sustaining mental and physical performance PROMISE â€Å"complete sports drinks† REASON TO BELIEVE 1.It has 15 g of Carbohydrates which is the body’s main source of energy. It is also primary fuel source for muscles which are working at a moderate to high intensity and prolonged endurance. 2.It has sodium, potassium, calcium and magnesium which replenish the electrolytes commonly lost through sweat. Electrolytes regulate body’s water and blood pH level. UNIQUE SELLING PROPOSITION To male and female that are active in sports. It is designed to balance the body fluids to give fast hydration and energy. It has Electrolytes (sodium, potassium, calcium and magnesium) and Carbohydrates which is effective and ideal in maintaining performance in sports. Go for the Complete Sports Drink. They are designed to effectively replace the fluids and minerals that are lost by sweating. They also provide a boost of carbohydrates (fuel) and help to sustain physical performance. New POWERADE ION4 ® helps replenish fluid losses and the four key electrolytes in the same ratio typically lost in sweat: sodium, potassium, calcium andmagnesium. It also contains carbohydrates at 15 calories per 100mL. POWERADE ION4 ® encourages the body to absorb fluid and maintain fluid balance. Carbohydrates are replaced as well, supplying your working muscles with fuel, helping you sustain mental and physical performance as you exercise. To help you fight off dehydration, POWERADE ION4 ®doesn’t switch your thirst receptors off prematurely. It keeps you feeling thirsty until you’re properly rehydrated. When sweating, the body loses more than just water. It loses these electrolytes which are important in exercise. The importance of each was reviewed by The American College of Sports Medicine, American Dietetic Association and Dietitians of Canada and it was learned that: Sodium is a critical electrolyte, which helps you sweat effectively and aids in muscle contraction; Potassium, on the other hand, is important in the overall energy metabolism; Third of the four key ions is calcium, which essential for overall bone metabolism; Lastly, magnesium plays a vital role in regulating cardiovascular and neuromuscular functions to sustain your performance. Drinking Powerade Ion4, completely packed with these four vital ions, is the most effective way to replace fluid and fuel losses. mountain Blast, Orange Burst and Silver Charge.

Ochre - The Oldest Known Natural Pigment in the World

Ochre - The Oldest Known Natural Pigment in the World Ochre (rarely spelled ocher and often referred to as yellow ochre) is one of a variety of forms of iron oxide which are described as earth-based pigments. These pigments, used by ancient and modern artists, are made of iron oxyhydroxide, which is to say they are natural minerals and compounds composed of varying proportions of iron (Fe3 or Fe2), oxygen (O) and hydrogen (H). Other natural forms of earth pigments related to ochre include sienna, which is similar to yellow ochre but warmer in color and more translucent; and umber, which has goethite as its primary component and incorporates various levels of manganese. Red oxides or red ochres are hematite-rich forms of yellow ochres, commonly formed from aerobic natural weathering of iron-bearing minerals. Prehistoric and Historic Uses Natural iron-rich oxides provided red-yellow-brown paints and dyes for a wide range of prehistoric uses, including but in no way limited to rock art paintings, pottery, wall paintings and cave art, and human tattoos. Ochre is the earliest known pigment used by humans to paint our worldperhaps as long ago as 300,000 years. Other documented or implied uses are as medicines, as a preservative agent for animal hide preparation, and as a ​loading agent for adhesives (called  mastics). Ochre is often associated with human burials: for example, the Upper Paleolithic cave site of Arene Candide has an early use of ochre at a burial of a young man 23,500 years ago. The site of Paviland Cave in the UK, dated to about the same time, had a burial so soaked in red ochre he was (somewhat mistakenly) called the Red Lady. Natural Earth Pigments Before the 18th and 19th century, most pigments used by artists were of natural origin, made up of mixtures of organic dyes, resins, waxes, and minerals. Natural earth pigments like ochres consist of three parts: the principle color-producing component (hydrous or anhydrous iron oxide), the secondary or modifying color component (manganese oxides within umbers or carbonaceous material within brown or black pigments) and the base or carrier of the color (almost always clay, the weathered product of silicate rocks). Ochre is thought generally to be red, but in fact is a naturally-occurring yellow mineral pigment, consisting of clay, siliceous materials and the hydrated form of iron oxide known as limonite. Limonite is a general term referring to all forms of hydrated iron oxide, including goethite, which is the fundamental component of the ochre earths. Getting Red from Yellow Ochre contains a minimum of 12% iron oxyhydroxide, but the amount can range up to 30% or more, giving rise to the wide range of colors from light yellow to red and brown. The intensity of color depends on the degree of oxidation and hydration of the iron oxides, and the color becomes browner depending on the percentage of manganese dioxide, and redder based on the percentage of hematite. Since ochre is sensitive to oxidation and hydration, the yellow can be turned red by heating goethite (FeOOH) bearing pigments in yellow earth and converting some of it to hematite. Exposing yellow goethite to temperatures above 300 degrees Celcius will gradually dehydrate the mineral, converting it first to orange-yellow and then red as hematite is produced. Evidence of heat-treatment of ochre dates at least as early as the Middle Stone Age deposits in Blombos cave, South Africa. How Old Is Ochre Use? Ochre is very common on archaeological sites worldwide. Certainly, Upper Paleolithic cave art in Europe and Australia contain the generous use of the mineral: but ochre use is much older. The earliest possible use of ochre discovered so far is from a Homo erectus site about 285,000 years old. At the site called GnJh-03 in the Kapthurin formation of Kenya, a total of five kilograms (11 pounds) of ochre in more than 70 pieces was discovered. By 250,000-200,000 years ago, Neanderthals were using ochre, at the Maastricht Belvà ©dà ¨re site in The Netherlands (Roebroeks) and the Benzu rock shelter in Spain. Ochre and Human Evolution Ochre was part of the first art of the Middle Stone Age (MSA) phase in Africa called Howiesons Poort. The early modern human assemblages of 100,000-year-old MSA sites including Blombos Cave and Klein Kliphuis in South Africa have been found to include examples of engraved ochre, slabs of ochre with carved patterns deliberately cut into the surface. Spanish paleontologist Carlos Duarte (2014) has even suggested that using red ochre as a pigment in tattoos (and otherwise ingested) may have had a role in human evolution, as it would have been a source of iron directly to the human brain, perhaps making us smarter. The presence of ochre mixed with milk proteins on an artifact from a 49,000-year-old MSA level at Sibudu cave in South Africa is suggested to have been used to make the ochre liquid, probably by killing a lactating bovid (Villa 2015). Identifying the Sources The yellow-red-brown ochre pigments used in paintings and dyes are often a mixture of mineral elements, both in their natural state and as a result of deliberate mixing by the artist. Much of recent research on ochre and its natural earth relatives has been focused on identifying the specific elements of a pigment used in a particular paint or dye. Determining what a pigment is made up of allows the archaeologist to find out the source where the paint was mined or collected, which could provide information about long-distance trade. Mineral analysis helps in conservation and restoration practices; and in modern art studies, assists in the technical examination for authentication, identification of a specific artist, or the objective description of an artists techniques. Such analyses have been difficult in the past because older techniques required the destruction of some of the paint fragments. More recently, studies that use microscopic amounts of paint or even completely non-invasive studies such as various types of spectrometry, digital microscopy, x-ray fluorescence, spectral reflectance, and x-ray diffraction have been used successfully to split out the minerals used, and determine the type and treatment of the pigment. Sources Bu K, Cizdziel JV, and Russ J. 2013. The Source of Iron-Oxide Pigments Used in Pecos River Style Rock Paints. Archaeometry 55(6):1088-1100.Buti D, Domenici D, Miliani C, Garcà ­a Siz C, Gà ³mez Espinoza T, Jà ­menez Villalba F, Verde Casanova A, Sabà ­a de la Mata A, Romani A, Presciutti F et al. 2014. Non-invasive investigation of a pre-Hispanic Maya screenfold book: the Madrid Codex. Journal of Archaeological Science 42(0):166-178.Cloutis E, MacKay A, Norman L, and Goltz D. 2016. Identification of historic artists pigments using spectral reflectance and X-ray diffraction properties I. Iron oxide and oxy-hydroxide-rich pigments. Journal of Near Infrared Spectroscopy 24(1):27-45.Dayet L, Le Bourdonnec FX, Daniel F, Porraz G, and Texier PJ. 2015. Ochre Provenance and Procurement Strategies During The Middle Stone Age at Diepkloof Rock Shelter, South Africa. Archaeometry:n/a-n/a.Dayet L, Texier PJ, Daniel F, and Porraz G. 2013. Ochre resources from the Middle Stone Age sequence of Diepkloof Rock Shelter, Western Cape, South Africa. Journal of Archaeological Science 40(9):3492-3505. Duarte CM. 2014. Red ochre and shells: clues to human evolution. Trends in Ecology Evolution 29(10):560-565.Eiselt BS, Popelka-Filcoff RS, Darling JA, and Glascock MD. 2011. Hematite sources and archaeological ochres from Hohokam and O’odham sites in central Arizona: an experiment in type identification and characterization. Journal of Archaeological Science 38(11):3019-3028.Erdogu B, and Ulubey A. 2011. Colour symbolism in the prehistoric architecture of central Anatolia and Raman Spectroscopic Investigation of red ochre in Chalcolithic Çatalhà ¶yà ¼k. Oxford Journal Of Archaeology 30(1):1-11.Henshilwood C, DErrico F, Van Niekerk K, Coquinot Y, Jacobs Z, Lauritzen S-E, Menu M, and Garcia-Moreno R. 2011. A 100,000-Year-Old Ochre-Processing Workshop at Blombos Cave, South Africa. Science 334:219-222.Moyo S, Mphuthi D, Cukrowska E, Henshilwood CS, van Niekerk K, and Chimuka L. 2016. Blombos Cave: Middle Stone Age ochre differentiation through FTIR, ICP OES, ED XRF and XRD . Quaternary International 404, Part B:20-29. Rifkin RF. 2012. Processing ochre in the Middle Stone Age: Testing the inference of prehistoric behaviours from actualistically derived experimental data. Journal of Anthropological Archaeology 31(2):174-195.Roebroeks W, Sier MJ, Kellberg Nielsen T, De Loecker D, Pares JM, Arps CES, and Mucher HJ. 2012. Use of red ochre by early Neandertals. Proceedings of the National Academy of Sciences 109(6):1889-1894.Villa P, Pollarolo L, Degano I, Birolo L, Pasero M, Biagioni C, Douka K, Vinciguerra R, Lucejko JJ, and Wadley L. 2015. A Milk and Ochre Paint Mixture Used 49,000 Years Ago at Sibudu, South Africa. PLoS ONE 10(6):e0131273.