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Evolution of Substrate Integrated Waveguide (SIW)

Development of Substrate Integrated Waveguide (SIW)  ­Ã‚ ­EVOLUTION OF SUBSTRATE INTEGRATED WAVEGUIDE STRUCTURES: AN OVERVIEW , and ...

Wednesday, December 25, 2019

An Offense Relating to Killing in the Canadian Court Free Essay Example, 2000 words

The Canadian criminal code refers to the law which gives different offenses levels according to the category of the offense committed and the gravity of offense. The criminal code in Canada was established in the year 1892. Section 91 of laws of Canada which came into existence in 1867 grants the national assembly authority over criminal offenses. Therefore, several rules under the constitution confer authority upon the judicial system to deal with offenses against the state. In the case above, part one of the legal code is about ordinary matters relating to criminal offenses. Therefore, this is an important element of the law that provides a direction upon which the legal proceeding shall have to take (Bergelson, 2009). Part 2 of the legal code also gives information relating to crime against peaceful coexistence. The murder of an innocent person is against an individual s enjoyment of rights granted by the constitution. Similarly, part 12.2 provides guidelines about the process fo r the implementation of the criminal rules. This part is very imperative since it gives direction in which the cases relating to offenses against humanity and property can be settled. We will write a custom essay sample on An Offense Relating to Killing in the Canadian Court or any topic specifically for you Only $17.96 $11.86/page

Tuesday, December 17, 2019

Similes In If We Must Die By Claude Mckay - 868 Words

Claude McKay was a Jamaican poet who brought hopefulness to the oppressed during the Harlem Renaissance in his poem, â€Å"If We Must Die†. McKay experienced the hardships that colored people were going through because of their race and nationality. He believed that the people should fight for what they believe in, even if it seems like a hopeless cause. McKay uses the concept of dying with dignity to persuade his fellow African-Americans that are being oppressed to fight for what they believe in. McKay uses literary devices such as similes to make a comparisons expressing how the African-Americans were being treated. He does this to show the people what the oppressors view them as and what they should be viewed as. This forces the people to†¦show more content†¦McKay says, â€Å"While round us bark the mad hungry dogs,/ making their mock at the accused lot† (l. 3-4). This symbolizes and compares the hunger of a dog to the hunger that the people have for freedom. This further proves that the freedom is much needed for both them, and future generations. This shows the reader that freedom is a right that all people no matter the race or nationality is entitled to. It then further proves to the reader that freedom from oppression is a concept that is worth fighting for. Especially since their rights are being taken away from them. Mckay uses this simile to further verify the need to fight for the cause. McKay uses hopeful words and exclamation marks to rally his people to fight back for the cause. McKay used this tactic when he says, â€Å"We must meet the common foe!† (l. 9), to show that the oppressors are equal to them. This in turn encourages the African-Americans that they do have a chance to fight back. The emphasis with the exclamation points, and the encouraging words give the reader a sense of hope that the fight is possible. In the poem, exclamations serve the purpose of motivating the people to fight for freedom of oppression. While hopeful words encourage them that the cause is manageable and that they can change the future. An example of this is when McKay says, â€Å"even the monsters we defy/Shall be constrained to honor us though dead!† (l. 7-8). McKay shows that even the oppressors will have to honor them for dying nobilly withShow MoreRelatedIf We Must Die by: Claude Mckay (Analysis Paper)1084 Words   |  5 PagesShaymeon Robertson AP English Literature If We Must Die By: Claude McKay If We Must Die, by Claude McKay is a sonnet written during the Harlem Renaissance period; a period where there was a flowering of African-American literature and art, (1919- mid 1930s). Though the Harlem Renaissance period was a time of thriving people and culture in the African-American community, prejudice was still very much active; somethingRead MoreAfrican Americans During The Civil War796 Words   |  4 Pages1900. And it consisted of lynching African Americans, it consisted of burning African Americans, it consisted of whipping African Americans. It consisted of all kinds of violence against African Americans for asserting themselves in any way. â€Æ' Claude McKay was born on September 15 1889 in Clarendon Jamaica. The son of peasant farmers, he was infused with racial pride and a great sense of his African heritage. His early literary interests, though, were in English poetry. He was a Jamaican-AmericanRead MoreThe Harlem Renaissance Period : Langston Hughes And Claude Mckay1178 Words   |  5 Pagesand musicians made a stand and spoke out for themselves and their people. Langston Hughes and Claude McKay are two poets during this time period that expressed their thoughts and feelings to this time period, each in very different ways. Hughes and McKay each wrote touching poems that described their point of view to this time period in which they use various methods of tone and theme, as well as similes to convey a vivid image of how it was during this time period for African Americans. Hughes couldRead MoreIf We Must Die By Claude Mckay1665 Words   |  7 PagesThe poem â€Å"If We Must Die† is written by African American author, Claude McKay. â€Å"If We Must Die† was written just a few decades after slavery was abolished. It was created at a time when blacks were highly discriminated and segregation was common. Mckay life was filled with hardships, especially as a writer. Roger M. Valade III said The United States proved not to be the land of opportunity for which McKay had hoped. Editors of larger publications refused his work because he sympathized withRead MoreAfrican Americans During The Civil War1155 Words   |  5 Pagesconsisted of lynching African Americans, burning African Americans, whipping of African Americans and countless other inhuman acts of mortality. It consisted of all kinds of violence against African Americans for asserting themselves in any way. Claude McKay was born on September 15 1889 in Clarendon Jamaica. The son of peasant farmers, he was infused with racial pride and a great sense of his African heritage. His early literary interests, though, were in English poetry. He was a Jamaican-AmericanRead MoreLet It Not Be Like Hog Poem Analysis1127 Words   |  5 PagesIf we must die—let it not be like hogs The simile â€Å"let it not be like hog† motivates the audience to die with dignity, it does this by implanting the thought of dying like a hog, since hogs often die a brutal and cruel death this simile motivates the audience to die a righteous death. This is a powerful line as it states the idea of the poem and sets the scene for the audience. This line is the beginning of an extended metaphor. Hunted and penned in an inglorious spot, This line (consisting of theRead More The Life and Times of Claude McKay Essay2788 Words   |  12 Pages The life and Writings of Claude McKay Introduction nbsp;nbsp;nbsp;nbsp;nbsp;Every literary period can be defined by a group of writers. For the Harlem Renaissance, which was an extraordinary eruption of creativity among Black Americans in all fields of art, Claude McKay was the leader. Claude McKay was a major asset to the Harlem Renaissance with his contributions of such great pieces of writings such as â€Å"If We Must Die† and â€Å"The Lynching.† McKay wrote in many different styles. His work whichRead MoreThe Great Gatsby By F. Scott Fitzgerald1330 Words   |  6 Pagesand This side of Paradise. Claude Mckay grew up loving writing and making poems. He was known for his during the Harlem Renaissance for voicing his voice on the social injustices. He also is known for two other poems called â€Å"If we must Die† and â€Å"Harlem Shadows†. Both of these authors wrote during the 1920s and have very similarities of what they had written about during that time period. Fitzgerald focuses more on the rich people and their American lifestyle while Mckay focused on the African AmericanRead MoreAnalysis Of Claude Mckay s If We Must Die1141 Words   |  5 Pages Claude McKay is known as a great writer because he wrote from his heart. Whether he was writing about his love for his Jamaican homeland or the injustices he saw as a black man in the United States, his use of passionate language is what made his writings resonate with readers from all backgrounds. He wrote â€Å"If We Must Die† following the Red Summer of 1919, a series of race riots that took place between May and October. In those five months, thousands of African-Americans were hunted and persecutedRead MoreAnalysis Of The Poem The Great Gatsby 2136 Words   |  9 Pagesachieving landings, turning corners, and persevering in the darkish while there is no moderate. She commands him, â€Å"So boy, don’t you switch again.† She instructs him now not to go back down the stairs despite the fact that he think s climbing is rough. He must are trying to not fall due to the fact that his mom is still going, nonetheless mountaineering, and her lifestyles â€Å"ain’t been no crystal stair.† Hughes wrote mother to Son When he was as soon as 21 years historical. He structures the poem as a dialog

Monday, December 9, 2019

Free Willy! Why We Should Free Captured Whales Essay Example For Students

Free Willy! Why We Should Free Captured Whales Essay Many people have heard about Keiko, the killer whale, who starred in the movie Free Willy. After seeing the movie, audiences discovered that the friendly whale in the movie was in a tank too small and in bad health because of that and other complications that come with being taken from its natural habitat to a place where it cant meet its own needs. Soon a foundation was set u[ and money started pouring in from children and their schools to come up with a plan to one day free Keiko. The tank/habitat cost $7.3 million to build and $9 million for staff, veterinarian, care, food, utilities and other costs for the first two years alone (Oregon Coast Aquarium). With all the problems in the world with humans and animals, it is hard to see this much money going to help just one whale. There are different types of animal stories that people hear about. There are the wonderful stories about adorable animals that do something amazing or need our help. There are also stories about animals that are used in good and bad experiments. When you hear about the treatment of some animals for research, you feel like forgetting about research. One such story was in 1988, three gray whales got stuck in freezing waters in Alaska, the whales were at risk of drowning because the holes in the ice that they were using to breathe were slowly freezing over. a large rescue was put together that ended up involving the National Guard and the U.S. and Soviet governments to get the whales free (Luke 87). Another story is of a mother cat that risked burning to death to save her kittens from a burning building. She and her kittens needed a home, which they got after the news coverage of the amazing act of the mother. The first story is amazing because two separate governments (which havent been able to get along for the most part of the last 50 years and have only recently started to become friendly) came together to help three animals that needed some outside help. The question is: were the two governments and other groups that helped, really trying to help the whales or get attention for themselves, and say Hey, we are helpful to everyone including animals that cant even ask for help. The news is just as bad as the two governments and groups. the reporters give the animals names, which makes viewers feel like they know the animals involved, so they keep watching to find out what happens. TV is the land of ratings and the only way to get ratings is to grab the audiences attention, with stories that make audiences have strong emotions about something (Luke 87). The cat and her kittens all got happy homes and the whales were able to go on their way, so in these two cases everything was successful. Then there are the more extreme cases of when activists illegally raid research facilities to free animals that are being experimented on. Some of these stories are justified, when the experiments being done and the condition of the animals are discovered. In some cases newborn animals such as monkeys are taken away from their mothers as soon as they are born, and are started on experiments. Some experiments range from implanting devices, electrical cords for stimulation, or a variety of things. These are some of the more extreme cases of experimentation and sometimes groups, such as PETA, step in and take things into their own hands, Illegally (Newkirk). Most people dont think about what it really means to try and release an animal back into the wild and what all needs to be done for the act to take place. People and activists that are saying that the animals should be released arent thinking about the fact that many of the animals have been in captivity for many years or born in captivity. These animals have been hand fed and not had to worry about predators. Informative: Punk rock Essay There needs to be more awareness about poaching, saving endangered species, and hunting for one species that wont harm another. Many dolphins die every day when they get caught in fishing nets because fisherment use techniques that catch dolphins along with the intended catch. In conclusion, the media keeps its eye on a few animals and activists worry about test animals, while animals that are out in the wild are suffering. Rehab centers like the one built for Keiko are wonderful, but that money spend on one animal could help many animals just as much. We shouldnt spend so much time worrying about animals already in captivity. This doesnt mean ignore them all together, those in captivity should be taken care of just like any household pet. Teaching an animal to survive on its own wont do any good when a poacher kills the animal. The human problem needs to be taken care of before animals can be helped. BibliographyLuke, Brian. Justice, Caring, and Animal Liberation (1992). Beyond Animal Rights: A feminist Caring Ehtic For the Treatment of Animals. ED. Josephine donovan and Carol J. Adams. New York: Continuum, 1996. 87. Newkirk, Ingrid. Free the Animals! The Untold Story of the U.S. Animal Liberation Front and Its Founder, Valerie. Chicago: Noble,1992. Oregon Coast Aquarium. Interntet. 20 April 1998. Available: Aquarium Watson, Paul. The Cult of Animal Celebrity. Animal People. June 1995. Online. Internet. 20 April 1998. Available: (no longer available) Zaneski, Cyril. Will Performing whale Fail or Flourish in the Wild? Knight-Rider New Service 10 March 1995. Online. Internet. 23 April 1998. Available: Knight-Rider BibliographyLuke, Brian. Justice, Caring, and Animal Liberation (1992). Beyond Animal Rights: A feminist Caring Ehtic For the Treatment of Animals. ED. Josephine donovan and Carol J. Adams. New York: Continuum, 1996. 87. Newkirk, Ingrid. Free the Animals! The Untold Story of the U.S. Animal Liberation Front and Its Founder, Valerie. Chicago: Noble,1992. Oregon Coast Aquarium. Interntet. 20 April 1998. Available: Aquarium Watson, Paul. The Cult of Animal Celebrity. Animal People. June 1995. Online. Internet. 20 April 1998. Available: (no longer available) Zaneski, Cyril. Will Performing whale Fail or Flourish in the Wild? Knight-Rider New Service 10 March 1995. Online. Internet. 23 April 1998. Available: Knight-Rider

Sunday, December 1, 2019

Nuclear Bombs Essays - Nuclear Weapon Design, Actinides,

Nuclear Bombs THE FIRST DESIGN of a nuclear weapon in the United States was a gun-barrel assembly, in which two sub-critical masses of very highly enriched uranium (HEU), were brought together by normal artillery propellant in a short gun barrel into a single over-critical configuration. (Criticality defines the minimum amount of a fissionable material in a particular configuration and density capable of a self-sustaining chain reaction). The second type of fission weapon is the implosion assembly, in which a high explosive (with a much faster detonation speed than the propellant used in a gun-type weapon) compresses fissile material so that it reaches a super-critical mass. Less fissile material is required for an implosion assembly because the critical mass varies inversely as the square of density. A nuclear explosion requires an exponentially growing fission chain reaction in which a neutron causes fission, producing energy and liberating two or three neutrons, more than one of which on average goes on to cause another fission, and so on. This chain breeding of neutrons and consequent fission is terminated by the disassembly of the system caused by the rapid energy release resulting from the fission process. In both the gun-barrel and implosion-type assemblies, neutron sources were devised that would emit neutrons at the appropriate time, and rapidly enough so that the chain reaction would, with high probability, be initiated before the material disassembled mechanically at speeds similar to that with which it was assembled. In the fissionable materials used in nuclear weapons (U-235 and plutonium-239), the fission is caused mainly by fast neutrons, which travel only a distance of seven to 10 centimeters before colliding with a nucleus, so that each doubling of the neutron population occurs in about 0.01 microseconds (one-hundred millionth of a second). The power of compound interest is such that beginning with a single fission, the time required at this doubling interval to cause fission of 1 kilogram of fissionable material is the time required for 80 such doublings, or less than 1 microsecond (one millionth of a second). This corresponds to an energy release equivalent to about 17 kilotons (17,000 tons) of high explosive. The gun-type weapon used at Hiroshima, which contained approximately 60 kilograms of HEU, produced an energy release equivalent to about 15 kilotons of high explosive. The Acquisition of a Weapon The separation of U-235 from the 140-times-as-abundant isotope uranium-238 (U-238) in natural uranium is a costly and difficult process, which originally could not be counted on to provide fissile material as rapidly as was thought to be necessary in the U.S. weapon program during World War II. Accordingly, with the discovery of the new element plutonium (in particular, the Pu-239 isotope that is produced in natural-uranium nuclear reactors by the parasitic capture of neutrons by U-238), production reactors were built at Hanford, Washington. A reactor with a thermal power of 250 megawatts produces about 250 grams of plutonium per day. Approximately 6 kilograms of plutonium was used in the world's first nuclear explosion--the Trinity test conducted at Alamogordo, New Mexico, on July 16, 1945--and an identical weapon detonated over Nagasaki three days after Hiroshima. Plutonium cannot be used in a gun-assembly weapon because the components are moved too slowly. Pu-239 is accompanied by the isotope Pu-240, which has a spontaneous fission decay that injects neutrons continuously into any mass of plutonium. The relatively slow assembly of metallic blocks in a plutonium gun (measured in milliseconds) would allow time for such neutrons to start the chain reaction when the assembly is barely super-critical, leading to a much reduced yield. Thus, for the plutonium weapon, assembly is achieved through implosion, which occurs on a time scale of microseconds. In the years following 1945, innovations were made to reduce the amount of costly fissionable material needed for nuclear weapons and to improve their safety. With the initial configuration much farther from criticality, the weapon was safer against undesired nuclear explosion. Nevertheless, one could conceive of accidents in which the high explosive would detonate at one point by, for instance, the impact of a rifle bullet on the explosive or the accidental dropping of the nuclear bomb. Almost from the beginning of the U.S. program, nuclear weapons were required to be safe against such undesired nuclear explosions. For

Tuesday, November 26, 2019

The Bering Land Bridge Between Russia and North America

The Bering Land Bridge Between Russia and North America The Bering Strait is a waterway that separates Russia from North America. It lies above the Bering Land Bridge (BLB), also called Beringia (sometimes misspelled Beringea), a submerged landmass that once connected the Siberian mainland with North America. While Beringias shape and size while above water is variously described in publications, most scholars would agree the land mass included the Seward Peninsula, as well as existing land areas of northeast Siberia and western Alaska, between the Verkhoyansk Range in Siberia and the Mackenzie River in Alaska. As a waterway, the Bering Strait connects the Pacific Ocean to the Arctic Ocean over the polar ice cap, and eventually the Atlantic Ocean. The climate of the Bering Land Bridge (BLB) when it was above sea level during the Pleistocene was long thought to have been primarily a herbaceous tundra or steppe-tundra. However, recent pollen studies have shown that during the Last Glacial Maximum (say, between 30,000-18,000 calendar years ago, abbreviated as cal BP), the environment was a mosaic of diverse but cold plant and animal habitats. Living on the Bering Land Bridge Whether Beringia was habitable or not at a given time is determined by the sea level and presence of surrounding ice: specifically, whenever the sea level drops about 50 meters (~164 feet) below its present position, the land surfaces. The dates when this happened in the past have been difficult to establish, in part because the BLB is currently mostly underwater and difficult to reach. Ice cores seem to indicate that most of the Bering Land Bridge was exposed during Oxygen Isotope Stage 3 (60,000 to 25,000 years ago), connecting Siberia and North America: and the land mass was above sea level but cut off from east and west land bridges during OIS 2 (25,000 to about 18,500 years BP). Beringian Standstill Hypothesis By and large, archaeologists believe that the Bering land bridge was the primary entryway for the original colonists into the Americas. About 30 years ago, scholars were convinced that people simply left Siberia, crossed the BLB and entered down through the mid-continental Canadian ice shield through a so-called ice-free corridor. However, recent investigations indicate the ice-free corridor was blocked between about 30,000 and 11,500 cal BP. Since the northwest Pacific coast was deglaciated at least as early as 14,500 years BP, many scholars today believe a Pacific coastal route was the primary route for much of the first American colonization. One theory gaining strength is the Beringian standstill hypothesis, or Beringian Incubation Model (BIM), the proponents of which argue that instead of moving directly from Siberia across the strait and down the Pacific coast, the migrants livedin fact were trappedon the BLB for several millennia during the Last Glacial Maximum. Their entry into North America would have been blocked by ice sheets, and their return to Siberia blocked by the glaciers in the Verkhoyansk mountain range. The earliest archaeological evidence of human settlement to the west of the Bering Land Bridge east of the Verkhoyansk Range in Siberia is the Yana RHS site, a very unusual 30,000-year-old site located above the arctic circle. The earliest sites on the east side of the BLB in the Americas are Preclovis in date, with confirmed dates usually no more than 16,000 years cal BP. Climate Change and the Bering Land Bridge Although there is a lingering debate, pollen studies suggest that the climate of the BLB between about 29,500 and 13,300 cal BP was an arid, cool climate, with grass-herb-willow tundra. There is also some evidence that near the end of the LGM (~21,000-18,000 cal BP), conditions in Beringia deteriorated sharply. At about 13,300 cal BP, when rising sea levels began to flood the bridge, the climate appears to have been wetter, with deeper winter snows and cooler summers. Sometime between 18,000 and 15,000 cal BP, the bottleneck to the east was broken, which allowed human entrance into the North American continent along the Pacific coast. The Bering Land Bridge was completely inundated by rising sea levels by 10,000 or 11,000 cal BP, and its current level was reached about 7,000 years ago. The Bering Strait and Climate Control A recent computer modeling of the ocean cycles and their effect on abrupt climate transitions called Dansgaard-Oeschger (D/O) cycles, and reported in Hu and colleagues 2012, describes one potential effect of the Bering Strait on global climate. This study suggests that the closing of the Bering Strait during the Pleistocene restricted cross-circulation between the Atlantic and Pacific Oceans, and perhaps led to the numerous abrupt climatic changes experienced between 80,000 and 11,000 years ago. One of the major fears of coming global climate change is the effect of changes in the salinity and temperature of the North Atlantic current, resulting from glacial ice melt. Changes to the North Atlantic current have been identified as one trigger for significant cooling or warming events in the North Atlantic and surrounding regions, such as that seen during the Pleistocene. What the computer models seem to show is that an open Bering Strait allows ocean circulation between the Atlantic and Pacific, and continued admixing may suppress the effect of the North Atlantic freshwater anomaly. The researchers suggest that as long as the Bering Strait continues to stay open, the current water flow between our two major oceans will continue unhindered. This is likely to repress or limit any changes in the North Atlantic salinity or temperature, and thus lessen the likelihood of sudden collapse of the global climate. Researchers caution, however, that since researchers arent even guaranteeing that fluctuations in the North Atlantic current would create problems, further investigations examining glacial climate boundary conditions and models are needed to support these results. Climate Similarities between Greenland and Alaska In related studies, Praetorius and Mix (2014) looked at the oxygen isotopes of two species of fossil plankton, taken from  sediment cores  off the Alaskan coast, and compared them to similar studies in northern Greenland. Briefly, the balance of isotopes in a fossil being is direct evidence of the kind of plantsarid, temperate, wetland, etc.which were consumed by the animal during its life. What Praetorius and Mix discovered was that sometimes Greenland and the coast of Alaska experienced the same kind of climate: and sometimes they did not. The regions experienced the same general climate conditions from 15,500-11,000 years ago, just before the abrupt climate changes that resulted in our modern climate. That was the onset of the Holocene when temperatures rose sharply, and most of the glaciers melted back to the poles. That may have been a result of the connectivity of the two oceans, regulated by the opening of the Bering Strait; the elevation of ice in North America and/or the routing of freshwater into the North Atlantic or Southern ocean. After things settled down, the two  climates  diverged again and the climate has been relatively stable since then. However, they appear to be growing closer. Praetorius and Mix suggest that the simultaneity of climates may presage rapid climate change and that it would be prudent to monitor the changes. Sources This glossary entry is part of the About.com  Guide to Populating America  and the  Dictionary of Archaeology. Bibliographic sources for this article are on  page two. Ager TA, and Phillips RL. 2008. Pollen evidence for late Pleistocene Bering land bridge environments from Norton Sound, northeastern Bering Sea, Alaska.  Arctic, Antarctic, and Alpine Research  40(3):451–461. Bever MR. 2001. An Overview of Alaskan Late Pleistocene Archaeology: Historical Themes and Current Perspectives.  Journal of World Prehistory  15(2):125-191. Fagundes NJR, Kanitz R, Eckert R, Valls ACS, Bogo MR, Salzano FM, Smith DG, Silva WA, Zago MA, Ribeiro-dos-Santos AK et al. 2008. Mitochondrial Population Genomics Supports a Single Pre-Clovis Origin with a Coastal Route for the Peopling of the Americas.  The American Journal of Human Genetics  82(3):583-592. doi:10.1016/j.ajhg.2007.11.013 Hoffecker JF, and Elias SA. 2003. Environment and archeology in Beringia.  Evolutionary Anthropology  12(1):34-49. doi:10.1002/evan.10103 Hoffecker JF, Elias SA, and ORourke DH. 2014. Out of Beringia?  Science  343:979-980. doi:10.1126/science.1250768 Hu A, Meehl GA, Han W, Timmermann A, Otto-Bliesner B, Liu Z, Washington WM, Large W, Abe-Ouchi A, Kimoto M et al. 2012.  Role of the Bering Strait on the hysteresis of the ocean conveyor belt circulation and glacial climate stability.  Proceedings of the National Academy of Sciences  109(17):6417-6422. doi: 10.1073/pnas.1116014109 Praetorius SK, and Mix AC. 2014.  Synchronization of North Pacific and Greenland climates preceded abrupt deglacial warming.  Science  345(6195):444-448. Tamm E, Kivisild T, Reidla M, Metspalu M, Smith DG, Mulligan CJ, Bravi CM, Rickards O, Martinez-Labarga C, Khusnutdinova EK et al. 2007.  Beringian Standstill and Spread of Native American Founders.  PLoS ONE  2(9):e829. Volodko NV, Starikovskaya EB, Mazunin IO, Eltsov NP, Naidenko PV, Wallace DC, and Sukernik RI. 2008. Mitochondrial Genome Diversity in Arctic Siberians, with Particular Reference to the Evolutionary  History of Beringia and Pleistocenic Peopling of the Americas.  The American Journal of Human Genetics  82(5):1084-1100. doi:10.1016/j.ajhg.2008.03.019

Saturday, November 23, 2019

Difference Between Baking Powder and Baking Soda

Difference Between Baking Powder and Baking Soda Both baking soda and baking powder are leavening agents, which means they are added to baked goods before cooking to produce carbon dioxide and cause them to rise. Baking powder contains baking soda, but the two substances are used under different conditions. Did You Know? You can  substitute  baking powder in place of baking soda (youll need more baking powder and it may affect the taste), but you cant use baking soda when a recipe calls for baking powder. Baking Soda Baking soda is pure sodium bicarbonate. When baking soda is combined with moisture and an acidic ingredient (e.g., yogurt, chocolate, buttermilk, honey), the resulting chemical reaction produces bubbles of carbon dioxide that expand under oven temperatures, causing baked goods to expand or rise. The reaction begins immediately upon mixing the ingredients, so you need to bake recipes which call for baking soda immediately, or else they will fall flat! Baking Powder Baking powder contains sodium bicarbonate, but it includes the acidifying agent already (cream of tartar), and also a drying agent (usually starch). Baking powder is available as single-acting baking powder and as double-acting baking powder. Single-acting powders are activated by moisture, so you must bake recipes which include this product immediately after mixing. Double-acting powders react in two phases and can stand for a while before baking. With double-acting powder, some gas is released at room temperature when the powder is added to dough, but the majority of the gas is released after the temperature of the dough increases in the oven. How Are Recipes Determined? Some recipes call for baking soda, while others call for baking powder. Which ingredient is used depends on the other ingredients in the recipe. The ultimate goal is to produce a tasty product with a pleasing texture. Baking soda is basic and will yield a bitter taste unless countered by the acidity of another ingredient, such as buttermilk. Youll find baking soda in cookie recipes. Baking powder contains both an acid and a base and has an overall neutral effect in terms of taste. Recipes that call for baking powder often call for other neutral-tasting ingredients, such as milk. Baking powder is a common ingredient in cakes and biscuits. Substituting in Recipes You can substitute baking powder in place of baking soda (youll need more baking powder and it may affect the taste), but you cant use baking soda when a recipe calls for baking powder. Baking soda by itself lacks the acidity to make a cake rise. However, you can make your own baking powder if you have baking soda and cream of tartar. Simply mix two parts cream of tartar with one part baking soda. Related Reading 5 Simple Buttermilk Substitutes: Most buttermilk you buy is made using chemistry. You can make homemade buttermilk yourself by simply adding an acidic kitchen ingredient to milk.Common Ingredient Substitutions: Baking powder and baking soda arent the only cooking ingredients people run out of!How Baking Powder Works: Learn how baking soda makes baked goods rise and why its used in some recipes but not others.How Baking Soda Works: Learn how baking soda works and how this affects how quickly you need to bake a recipe once you mix it.Baking Powder Shelf Life: Baking powder doesnt last forever. Learn about its shelf life and how to test it for freshness so your recipe doesnt fall flat.

Thursday, November 21, 2019

Business Analysis Report - Flight Centre Essay Example | Topics and Well Written Essays - 2000 words

Business Analysis Report - Flight Centre - Essay Example Current paper focuses on the culture and structure of a well-known Australian company, the Flight Centre. The firm is based on a unique principle: the establishment of small operational centers is preferred instead of large departments; autonomous and flexible small units are used for developing the firm’s operations worldwide. At this point, the firm is strongly differentiated from its rivals – which are likely to use large operational units which can handle a high volume of work but which are characterized by lack of effective communication among their members. Despite its success until today, as explained in the case study, the firm needs to update its culture and structure in order to respond to the challenges of its external environment. The key elements of the firm’s culture and structure are critically evaluated in this paper using relevant literature; the choices available to the firm in terms of culture and structure are also presented, taking into consi deration the conditions in the global market but also the firm’s existing resources and characteristics – meaning its current culture and structure. 2. ... that should be used for managing the various business activities; from this point of view, culture can promote ‘integration and cohesion across the organization’ (Nickson 2007). From a similar point of view, Deal and Kennedy (1988) note that organizational culture indicate ‘the way we do things around here’ (Deal and Kennedy 1988, p.4, in Nickson 2007). Robbins (2009) refers to a quite common definition of culture, which is based on the view that culture, as an element of modern organizations, is ‘a system of shared meaning held by members, distinguishing the organization from other organizations’ (Robbins 2009). Moreover, Dessler (1976) uses three different approaches for defining culture: ‘the structural, subjective and synthetic approaches’ (Dessler 1976, in Dwivedi 1995). The above approaches could be analyzed as follows: the structural approach perceives culture as ‘a set of characteristics which differentiate an organiza tion from another one’ (Dessler 1976, in Dwivedi 1995). At the next level, the subjective approach refers to culture as ‘the view of employees on their organization’ (Dessler 1976, in Dwivedi 1995). Finally, the synthetic approach is based on the combination of the two previous approaches for defining organizational culture (Dwivedi 1995). On the other hand, Schein (1992) describes culture as the ‘perception of a group of individuals/ employees on their organization’ (Schein 1992, in Miller 2008). In the context of the above definition, organizational culture can be successfully defined only if the communication across the organization is satisfactory. The close dependency of culture on communication is also highlighted in the study of Inceoglu (2002); in the above study, reference is made to the sharing of beliefs and