Invasive plants Essay -- Native Plant Species, Environment

Since we are accustomed to a life full of modern conveniences, it is important to remember that human survival still depends on the planet's natural diversity. Pennsylvania has 25,000 species of plants and animals, with more than 2,100 being native (IConserve, 2007). It is critical to appreciate the sustainable use of these natural resources that influence our beautiful state’s economic health and quality of life of all Pennsylvanians. Yet many threats to our home’s biodiversity are present. One significant threat is invasive plant species that are eliminating native plant species. Invasive plants are plants which grow aggressively, spreading and displacing other plants (Ball, 2002). Whether it is intentional or not, they are often introduced by humans. On the other hand, native plants are pants that existed within Pennsylvania before European settlement. Because they are meant to grow here, they are quite beneficial to the environment as well as people (Fell 19 95). In order to preserve Pennsylvania’s health and natural beauty, it is essential to control the growth of invasive plant species while supporting the growth of native plant species. When Pennsylvania was first settled in the 1600’s by William Penn, abundant plants covered about 90% of the state (IConserve 2007). All of these plants are considered to be natives because they existed in the area before human settlement. Unfortunately, due to human interactions with nature, the landscape has changed significantly over time. Many plants that once defined Pennsylvania have been lost; however, this problem can be reversed to some extent. By 2000, five percent of Pennsylvania’s native plant species had been lost and another twenty-five percent were in danger o... ...s that are invasive and controlling or destroying any invasive species. These plants are adaptable and grow well under a wide range of conditions and therefore have a much better chance of thriving. It is also important to use fertilizers in moderation because high nitrogen often stimulates the aggressive growth of plants (Fell, 1995). Planning land management is also important. Weekly mowing is important for the maintenance of lawns and weeding is important for gardens. Pennsylvania’s meadows should be mowed annually and woodlands should be monitored for the need to remove invasive plant species (Ball, 2001). Unfortunately, invasive plants are causing problems not only in Pennsylvania, but all across the country (Invasive Plants: Silent Invaders, 2004). It is essential that efforts are made in order to keep this plant crisis from deteriorating further.

Most Important Turning Point in WW2 Essay

There’s always a discussion or argument as to what the most important turning point in the war was. This is a very difficult question to answer because every important part of the war happened because of another important part of the war. But is there just one main turning point in the war or could there be multiple? The Battle of Britain The Battle of Britain took place between August and September 1940. After the success of Blitzkrieg, the evacuation of Dunkirk and the surrender of France, Britain, on the Western front, was by herself. The Battle of Britain was the closest British Civilians actually got to see any of the fighting in WW2. In July 1940 through to October 1940 a few thousand young men, ably backed by the British Public and the men and women of the RAF ground staff held off the mightiest Air Force assembled up to that point in time. The German Luftwaffe. On September 15th came the last major engagement of the battle. On that day, the Luftwaffe lost 60 planes while the RAF lost 28. The overall casualties amounted to Germany losing 1,100 planes whereas Britain had lost just over half that amount (650). On September 17th, Hitler cancelled the invasion of Britain. The invasion would not have been possible if the Royal Navy had been able to attack the barges; and, with the RAF in existence the Germans could not hope to attack the Royal Navy. So, no invasion took place. If Britain had lost the Battle of Britain then Britain would have almost certainly been invaded and probably conquered like the other European countries. But Britain did not lose the Battle of Britain and, so, Britain was not conquered. The continued existence of Great Britain as a fighting nation meant that†¦ Germany needed many men to garrison Western Europe rather than attack Russia because the resistance movements in the occupied countries had support from Britain. When Japan and Germany declared war on America, America, being the biggest industrial power at the time, was able to use Britain as a massive base to store all the aircraft they needed to bomb Germany. The majority of Germany`s artillery was kept back in Europe and Germany on anti-aircraft duties because of these huge bombing raids. These drains on Germany’s resources meant they were not able to conquer Russia in the quick manner needed. This led to the eventual meat  grinder of the Eastern front which swallowed so much of their army and air force. How much difference would those guns, men and ammunition have made at Stalingrad? The Battle of Britain boosted British morale through the roof. This was shown in the famous â€Å"never was so much owned by so many to so few.† Speech by Winston Churchill. The British also kicked the Axis out of Africa, forcing Hitler to send much needed supplies and men to assist the failing Afrika Korps. All of this would not have happened if the British had lost the Battle of Britain. The Enigma Code The German military used the Enigma cipher machine during WW2 to keep their communications secret. The machine was available commercially during the 1920s, but the military potential of the device was quickly realised and the German army, navy and air force all used a more developed model of the machine to encipher their messages believing that it would make these communications unsolvable to the enemy. The Enigma machine is an electro-mechanical device that relies on a series of rotating ‘wheels’ or ‘rotors’ to scramble plaintext messages into jumbled cipher text. The machine’s variable elements can be set in many billions of combinations, and each one will make a completely different cipher text message. If you know how the machine has been set up, you can type the cipher text back in and it will unscramble the message. If you don’t know the Enigma setting, the message remains indecipherable. The German authorities believed in the absolute security of the Enigma. However, with the help of Polish mathematicians who had managed to secure a machine before the outbreak of WW2, British code breakers stationed at Bletchley Park managed to exploit weaknesses in the machine and how it was used and were able to crack the Enigma code. Breaking the Enigma ciphers gave the Allies a key advantage, which, according to historians, shortened the war by two years thus saving many lives. In one specific case the team behind the Enigma code were able to inform the British 8th Army at El Alamein of an incoming attack from the Afrika corps. Stalingrad The Battle of Stalingrad was one of the most major and decisive battles of World War 2 where the Axis fought the Soviet Union for control of the city of Stalingrad. The battle took place between August 23, 1942 and February 2,  1943 and was fought with close-quarters combat and lack of regard for civilian casualties. It is among the bloodiest battles in the history of warfare with almost two million casualties. The German attack, led by General Paulus, to capture Stalingrad began in late summer 1942, and was supported by severe Luftwaffe bombing that reduced much of the city to rubble. The German offensive eventually became reduced to building-to-building fighting. Despite controlling nearly the entire city at times, the Germans were unable to shake off the last soviets clinging to their City. Both sides fought vigorously over the city and Stalin ordered his troops, â€Å"Not a step back.† The Battle for Stalingrad was rife with sniping on both sides; however the Russians us ed a tactic no other country did during the war. This tactic was the employing of female snipers on the field, which they did to great effect. By doing this, the Russian Army was able to fill their ranks further as well as raise morale of troops and civilians by reporting on the lethal effectiveness of the Soviet fighting woman. Morale was one of the most vital things a soldier could have. Without morale a soldier became ineffective and the worst thing for morale was an enemy Sniper. The presence of a sniper was usually revealed to enemy troops by a single shot, followed by the death of one of their comrades. This presented a problem to the remaining troops. Not only were they under fire from an enemy, but they could not see where this enemy was nor could they predict who would be the next victim. Additionally, if the sniper left, there was no way for the opposing men to know unless one of them left cover, and therefore risking his life. The strain of being constantly in danger was increased by the inability of the troops to strike back at the sniper, as well as their anger at the death of their fellow soldiers. During the Battle of Stalingrad, the Russian snipers, particularly Vassili Zaitsev, proved to cause so much damage to German morale and such a boost to the Russians that German High Command sent in their best sniper, a Major Koning, to hunt down and kill Zaitsev. Unfortunately for the Germans, this plan backfired, and Zaitsev killed Koning, further lifting Russian morale and dropping German fighting spirit to a new low. On 19 November 1942, the Red Army launched Operation Uranus, a two-pronged attack at the weaker Romanian and Hungarian forces protecting the German flanks. After heavy fighting, the Axis army was cut off and surrounded inside Stalingrad. Adolf Hitler’s resolute belief in  no surrender led to more loss of life. Eventually, the failure to save the German Forces and lack of supplies led to the surrender. By February 1943, Axis resistance in Stalingrad had stopped and nearly 125,000 remaining troops of the 6th Army had surrendered, the others were killed. Only 6,000 soldiers made it back home. The battle lasted 5 months, 1 week, and 3 days. It was Germany’s first major defeat. However by the end of the battle 99% of the buildings in Stalingrad were reduced to piles of rubble. â€Å"The siege of September 13, 1942 to January 31, 1943 will inspire forever the hearts of all free people. Their glorious victory stemmed the tide of invasion and marked the turning point in the war of the Allied nations against the forces of aggression.† Franklin D Roosevelt, congratulating Joseph Stalin on the soviet Victory at Stalingrad. This shows that not only did Stalingrad spread morale throughout the U.S.S.R but throughout Allied troops around the world. For the U.S.S.R Stalingrad was it. A desperate last stand against the Axis and total inhalation. Not only were there vital oil sources to the South-East but it was a battle between Stalin and Hitler themselves (considering it was Stalin’s city). After the Battle of Stalingrad Germ an forces never recovered to their earlier strength and so gave up their campaign on the USSR. It was the beginning of the end and retreat for the Axis powers in Russia. El Alamein Between 1940 and 1942, the desert war went back and forth over the north coast of Africa. After initial British success, the Afrika Korps (the German army) made a determined advance, gradually beating the British 8th Army back as far as a small town called El Alamein near the Egyptian border. At the end of the First Battle of El Alamein, the Allies suffered about 13,250 wounded, captured, missing, and killed, while the Axis suffered 17,000. The Second Battle of El Alamein marked a major turning point in the Western Desert Campaign of the Second World War. The battle lasted from 23 October to 5 November 1942. Germany had: 30,542 casualties, 500 tanks, 254 guns, 84 aircraft. And British and other Commonwealth forces had: 13,560 casualties, 332- 500 tanks, 111 guns, 97 aircraft. After the two battles the world was convinced that the Axis powers, particularly Germany, were not invincible as this was their second major military defeat. A quarter of a million Italian and German soldiers su rrendered at El Alamein which was nearly twice the  amount that surrendered at Stalingrad four months earlier. This destroyed Italian moral completely because not only were they crushed at El Alamein, their country became the new frontline, and for Germany It was another momentous disaster. The Battle of El Alamein not only allowed total free access to the Suez Canal for Allied shipping, which was of special importance now that the war had taken on a global nature, but it also stopped the Germans from threatening the Middle-Eastern oil fields, a major supplier of Allied oil reserves. The victory, coupled with joint Allied landings in French Algiers, also finally spelled the elimination of an Axis presence in North Africa and ended the Italian dreams of a ‘new Roman Empire’. There were also strategic implications: the defeat in North Africa began the series of events that led the invasion of mainland Italy and the toppling of the Italian dictator Mussolini. This brought the Italians onto the Allies’ side and left Germany at a strategic disadvantage across the whole of the M editerranean. The North African campaign also drew German troops away from the massive battles that were taking place in the U.S.S.R. I have not included D-Day as one of the most important turning points in the war because I believe that the fact that D-Day happened means that the tide had already turned. For the Western Front the tide turned at the Battle of Britain because if Britain had been taken then: America wouldn’t have an Allied country close to Germany, the Allies wouldn’t have been able to win in North Africa and D-Day wouldn’t of been able to happen in the first place. I have also not included Pearl Harbour as a Turning point because I feel Japan only attacked the Americans at Pearl Harbour so they could destroy some of their vital ships and resources. I think they did this because they knew that war was going to break out between Japan and America at some point and so decided to jump the gun and get the upper hand. This would mean that Pearl Harbour was significant point in the war rather than a turning point. In conclusion I would say that there wasn’t a turning point as such but four main turning points that led do the downfall of Nazi Germany, Italy and Japan. These being: The Battle of Britain, The breaking of the Enigma Code, Stalingrad and El Alamein. This is because the three battles were last chance stands against the mighty German Army, and defeat would have meant loss of highly important resources, land, men and morale. Additionally if the Enigma code had not been broken the war might have raged  on for another two or three years and many more millions could have died. Bibliography http://www.telegraph.co.uk/sponsored/russianow/features/9942741/stalingrad-dates-legacy.html http://www.bbc.co.uk/history/worldwars/wwtwo/ww2_summary_01.shtml http://www.historyplace.com/worldwar2/defeat/catastrophe-stalingrad.htm http://bbrown.umwblogs.org/ http://en.wikipedia.org/wiki/Never_was_so_much_owed_by_so_many_to_so_few http://stalingrad3.weebly.com/index.html http://www.historylearningsite.co.uk/battleofbritain.htm http://www.bletchleypark.org.uk/content/machines.rhtm

The History of the First Toilet

For civilization to come together and function, you’d think people would need toilets. But ancient records that date back to around 2800 BCE have shown that the earliest toilets were a luxury afforded only to the most affluent households in what was then the Indus Valley settlement of Mohenjo-Daro. History The thrones were simple but ingenious for its time. Made of brick with wooden seats, they featured chutes that transported the waste toward street drains. This was all made possible by the most advanced sewage system of the time, which featured several sophisticated water supply and sanitation technologies. For example, drains from houses were connected to larger public drains and sewage from a home was connected to the main sewage line.   Toilets that used running water to dispose of waste have also been discovered in Scotland that date back to roughly the same time. There’s also evidence of early toilets in Crete, Egypt, and Persia that were in use during the 18th-century BCE. Toilets connected to a flush system were popular as well in Roman bathhouses, where they were positioned over open sewers.   In the middle ages, some households fashioned what was referred to as garderobes, basically a hole on the floor above a pipe that carried the waste out to disposal area called a cesspit. To get rid of the waste, workers came during the night to clean them out, collect the waste and then sell it as fertilizer.   In the 1800s, some English homes favored using a waterless, non-flush system called the â€Å"dry earth closet.† Invented in 1859 by the Reverend Henry Moule of Fordington, the mechanical units, comprised of a wooden seat, a bucket and separate container, mixed dry earth with feces to produce compost that can be safely returned to the soil. You can say it was one of the first composting toilets that are in use today at parks and other roadside locations in Sweden, Canada, the U.S., the U.K., Australia, and Finland.   First Design The first design for the modern flush toilet was drawn up in 1596 by Sir John Harington, an English courtier. Named the Ajax, Harington described the device in a satirical pamphlet titled â€Å"A New Discourse of a Stale Subject, Called the Metamorphosis of Ajax,† which contained insulting allegories to Earl of Leicester, a close friend of his godmother Queen Elizabeth I. It had a valve that let water flow down and empty a waterproof bowl. He would eventually install a working model at his home in Kelston and for the queen at Richmond Palace.   However, it wasn’t until 1775 that the first patent for a practical flush toilet was issued. Inventor Alexander Cumming’s designed featured one important modification called the S-trap, an S-shaped pipe below the bowl filled with water that formed a seal to prevent fold smelling odors from rising up through the top. A few years later, Cumming’s system was improved upon by inventor Joseph Bramah, who replaced the sliding valve at the bottom of the bowl with a hinged flap.   It was around the middle of the 19th century that â€Å"water closets,† as they were called, started to gain a foothold among the masses. In 1851, an English Plumber named George Jennings installed the first public pay toilets at the Crystal Palace in London’s Hyde Park. At the time, it cost patrons a penny to use them and included extras such as a towel, comb and shoe shine. By the end of the 1850s, most middle-class homes in Britain came equipped with a toilet.

Essay about My Philosophy on Education - 1462 Words

My Philosophy on Education â€Å"Wake up! It’s time to get ready for school.† I loved those words as a child but grew to hate them as a teen. As a child, school consisted of hands-on activities, mingling with others, and enticing lessons. As a teen, school consisted of being forced to remain seated, reading a chapter, answering the questions at the end of the chapter, and completing a worksheet. I found school to be boring and excessively routine. Therefore, I never aspired to be a teacher. I cringed at the thought of that routine! After graduating from college with a degree in recreation and spending ten years in wonderful jobs that always led me back to children, like working at a child-care center for the abused, a childrens†¦show more content†¦Along with the help of the learning community such as parents or other family contacts, other teachers, events and activities, we need to discover what sparks each child and help him in his development. This includes determining his learning style whether it’s auditory where he learns by hearing, visual where he learns by seeing, or kinesthetic where he learns by doing, or a mixture of the three. This also includes determining for each child what Howard Gardner calls Multiple Intelligence. While I wouldn’t necessarily label learning styles so specifically for the fear of omitting one or failing to recognize others, I do agree with Gardners’ concepts and agree that we can determine and offer learning through linguistic, mathematical, musical, kinesthetic, spatial, interpersonal, intrapersonal, naturalist, or other abilities. I so believe in re-enforcers. I hesitate to refer to it as â€Å"conditioning† as did mid-twentieth researchers Ivan Pavlov and BF Skinner because of the connotations of brain washing, altering, or influencing but I do believe that positive reinforcement is key for students and teachers. In many schools where I’ve substituted, teachers spend an excessive amount of time reprimanding students who are misbehaving. Rather, I believe in proximity control, approaching the student but continuing to teach.Show MoreRelatedMy Philosophy On The Philosophy Of Education844 Words   |  4 PagesIn mathematics, as in life, everything must be brought to the simplest of terms. I base my teaching philosophy on the foundation that every student is capable of learning mathematics. I will strive, as a teacher, to ensure that my students are able to have a strong foundation of mathematical skills when they leave my classroom. Some students believe that they are not mathematically gifted ; therefore, incapable of learning mathematics. I believe to the contrary, all students with motivation, sustainedRead MoreMy Philosophy On Philosophy Of Education852 Words   |  4 PagesMy Philosophy of Education My philosophy of education is founded on a belief that all students have a desire to learn and to feel accepted. Learning takes place when students are able to have their specific needs meet inside the classroom, to feel accepted in the environment, and find the learning to be meaningful. I believe that before learning can take place a proper educational environment must be present inside the classroom. In order to make any classroom work I believe you need meet three criteriaRead MoreMy Philosophy Of Education As A Education864 Words   |  4 Pagesdifferent philosophy of education, and what purpose education serves in a child’s life. The five philosophies of education that we recognize are: Essentialism, Perennialism, Progressivism, Social Reconstructionism, and Existentialism. I would most recognize my philosophy of education as Essentialism. Essentialism has been a dominant influence in American education since World War II. It focuses on core curriculum of traditional academic topics. I believe that the purpose of education is teachingRead MoreMy Philosophy of Education824 Words   |  4 Pages13 February 2011 My Philosophy of Education I believe that progressivism educational philosophy most closely matches my educational ideals. In my opinion based on the progressivism educational philosophy, the purpose of education is to enable students to learn useful knowledge that has meaning to them in the future. Thus, the most useful education for students is the skill of â€Å"learning how to learn†. When students understand the methodsRead MoreMy Philosophy Of Education And Education1038 Words   |  5 PagesMy Philosophy of Education When trying coming up with a personal philosophy of education, I had to ask myself what the purpose of education is. To me, the purpose of education is to teach students knowledge that is needed to make it through school and to succeed in the world after graduation. Anyone can go into teaching, but not every teacher can teach. Teachers go above and beyond to introduce methods, philosophies, and strategies to help their students learn, as well as, retain the informationRead MoreMy Education Philosophy 1511 Words   |  6 PagesPersonal Mission Statement Education is the imparting and acquiring of knowledge and skills through teaching and learning. As an educator, my personal mission statement is to master my subject area in order to serve as a role model for my students thereby producing students who thoroughly understand the subject matter, and who develop holistically. In order to achieve this goal I must have a set education philosophy with a strong Christian worldview. I must also have a general understanding of theRead MoreMy Philosophy Of Education1056 Words   |  5 PagesPhilosophy of Student Engagement My philosophy of education is that every child should receive high quality education that is inclusive, relevant and meaningful to their life. I am a firm believer of making pedagogy relatable to my students. My vision is driven by my personal experiences with the American school system. I was what is thought of as â€Å"A child at risk†. I am an immigrant, black, Muslim student. My life is transactional as I am a part of multiple marginalized groups. Most of my teachersRead MoreMy Philosophy Of Education And Education864 Words   |  4 PagesPhilosophy of Education Children are the future and their education is the key to our society’s success. When considering this, I realize I have an immense responsibility as an educator. The main focuses of my teaching are active learning, building character within students, and providing meaningful curriculum. I want to create a comfortable setting where every student feels safe to learn. In many ways, my philosophy agrees with the holistic approach to education. I feel this challenges the studentRead MoreMy Philosophy on Education814 Words   |  3 PagesMy Philosophy of Education I think when I made the decision to become a teacher I was not thinking the seriousness of this decision. When we become teachers we also become the molder that will shape our student to be successful in life. But when you decide to become a teacher in a Christian school you are not only shaping this student to be successful in life but we are also shaping their Christian mind to do things with a feeling knowing that they are shape and where made by the image of GodRead MoreMy Philosophy Of Education1015 Words   |  5 Pagesimmediately sparked my interest in becoming an educator and share my personal beliefs on the important aspects of education. In addition to this, I will present various traits I believe are essential and critical for teachers to successfully fulfill their role as an educator. During my elementary years, I developed an urge to frequently ask many questions during the school day. Being able to question anything was astonishing to me. This was because my parents were unable to answer my questions and help

Unmanned Aircraft Systems ( Uas ) - 1216 Words

Unmanned aircraft systems (UAS) have become a quickly growing part of the aviation community over the last five to ten years. More and more of these aircraft are flying in the National Airspace System (NAS) with each passing year, without any set rules governing their operation. With the growing population of UAS in the NAS, for military, civil, and commercial use, the need for regulation is becoming increasingly obvious. How to regulate this type of aircraft is no simple task. Taking into consideration the many factors of these aircraft such as size, purpose, who is using them, and location of use, it is difficult to determine what regulation is required. That is the task that has been set before the Federal Aviation Administration (FAA). To determine what type of regulation is needed to integrate and ensure the safe operation of UAS in the NAS since the skies that they share are shared with manned aircraft. Integration of UAS into the NAS Since the first flight of Orville and Wilbur Wright’s aircraft at Kitty Hawk, the development of new aircraft types and technology in these and existing aircraft has moved along at a quick and steady pace. Moreover, since 1903, aircraft limits continually have been pushed and surpassed. Aircraft now fly higher, faster, farther and carry more cargo or passengers than ever before. Nevertheless, it would only seem logical the next step in aviation evolution is removal of the human factor in flight. Unmanned aircraft systems (UAS) haveShow MoreRelatedAn Unmanned Aircraft System ( Uas )1691 Words   |  7 Pagesthe public safe. With so many people in such a large area, it can become difficult to for officers monitor everything. One possible answer to the human problem of not being able to be everywhere at once includes an inhuman object. An unmanned aircraft system (UAS) or a â€Å"drone† equipped with a surveillance camera can provide an aerial view of the crowd without disrupting the normal activities of the event. According to Koerner (2015), a drone can potentially provide an inexpensive alternative toRead MoreUnmanned Aircraft System Essay720 Words   |  3 PagesUnmanned Aircraft Systems are constantly evolving. The latest developments in UAS include features that can be abused by operators, such as anti-drone technologies, or that can increase the risk of accidents and unsafe incidents. This area of UAS use is expected to evolve for the foreseeable future. Local Economy Wolfton’s economy is largely based on the technology sector. The use of drones for hobby and recreational purposes allows individuals to familiarize themselves with this exciting new technologyRead MoreEssay about Laws Governing Unmanned Aircraft: A Literature Review1245 Words   |  5 PagesIntroduction Unmanned aircraft systems (UAS) popularly known as â€Å"drones† have a long history dating back to World War I as remote-controlled aerial targets according to Howeth (1963). However, their current role in surveillance is much shorter. Unmanned aircraft are predominantly used by military in the roles of surveillance and precision strikes. Advancements within the military UAS programs and the signing of FAA Modernization and Reform Act of 2012, has facilitated the necessity to formulate aRead MoreVisual Line Of Sight Operations1476 Words   |  6 Pagesoperations (BVLOS) to unmanned aerospace systems. The added applications of beyond the visual line of sight operations are search and rescue operations, package deliveries, border patrol inspections, and environmental research (Karpowicz, 2016). The creators of Skylight believe the new UTM system will revolutionize UAS operations and drastically increase UAS applications (Karpowicz, 2016). Figure 5. â€Å"NASA’s concept for a possible UTM system would safely manage diverse UAS operations in the airspaceRead MoreCase Analysis : Training Requirements For United States Navy1280 Words   |  6 PagesStates Navy (USN) MQ-4C Triton Unmanned Aircraft System (UAS) Operators Summary The MQ-4C Triton Unmanned Aircraft System (UAS), previously known as the Broad Area Maritime Surveillance (BAMS), is a major defense acquisition program (MDAP) based on the United States Air Force (USAF) high-altitude, long-endurance (HALE) RQ-4B Global Hawk (Cohn Harrison, 2014; Department of Defense [DoD], 2013; Naval Air Systems Command [NAVAIR], 2014). The program â€Å"†¦entered System Development and DemonstrationRead MoreVtol UA Case Study998 Words   |  4 Pagesconcept of unmanned VTOL use is still in its infancy. Several studies and proof of concept papers have been published to support VTOL UAS operation in both military and civilian applications. Manufactures are starting to take notice of this research and are beginning to design, engineer, and build traditional and similar hybrid configurations; however, quadcopter and fixed-wing sUAS continue to dominate the market. In 2017 the U.S. Navy Program Executive Office for strike weapons and unmanned aviationRead MoreCollisions on the ground are of grave importance as well. A MQ-1C UAV pilot undergoing training1200 Words   |  5 Pagesits vehicle and ground control packages (Brodeur, 2012). An increased traffic flow of both manned and unmanned aircraft will most definitely increase the probability of collision in the air as well as on the ground. This can lead to human casualties and injuries. In order to fortify safety of use new technologies must be designed, tested, and integrated into the current and future UAV systems. The realization is UAVs will encounter on average at least one hundred thousand aviation flights on aRead MoreThe Northrop Grumman Mq 4c Triton Unmanned Aircraft System1161 Words   |  5 PagesThe Northrop Grumman MQ-4C Triton unmanned aircraft system (UAS) is a maritime variant of the Air Force’s high-altitude long-endurance (HALE) RQ-4B Global Hawk (Government Accountability Office [GAO], 2015). The Triton, previously known as the Broad Area Maritime Surveillance (BAMS) UAS, is a component of the Maritime Patrol Reconnaissance Force (MPRF) family of systems (Naval Air Systems Command [NAVAIR], 2014). It â€Å"†¦is intended to pr ovide persistent maritime intelligence, surveillance, and reconnaissanceRead MoreA Report On Flight Training1026 Words   |  5 Pagesmilitary aviator training and is an important training tool for safely teaching flying skills in a controlled environment that is normally too dangerous, or costly to acquire through the use of an actual aircraft. The U.S. Air Force and Army typically use simulators to safely train new Unmanned Aerial Vehicle (UAV) operators on critical tasks performed for proficiency and certification without the use of costly flyable aviation resources. Research has discovered there is a lack of conventional standardizedRead MoreAira Case Study784 Words   |  4 Pagesof a classification system for persons issued sUAS air carrier certificates. †¢ Spectrum Usage – Allows drones to use spectrum for wireless control purposes if permitted by the FCC and FAA. With respect to licensed frequencies, they also must have the consent of spectrum licensees †¢ Collegiate Training Initiative program for UAS – The FAA must create a Collegiate Training Initiative program to help prepare college students for careers involved UAS. †¢ University use of UAS – Streamlines the approval

Nuclear Power Problem or Solution Free Essays

string(302) " successfully dealt with and that said, this leaves all reactors that followed looking toward a solution and the prediction of over a 100,000 metric tons of waste by 2035 that needs to be completely isolated from the environment for tens or even hundreds of thousands of years because it is so deadly\." Nuclear power is complicated. A nuclear power plant provides energy that does not contribute to global warming. Climate concerns have seen a rise in the construction of new reactors to address growing demands of electricity worldwide. We will write a custom essay sample on Nuclear Power: Problem or Solution or any similar topic only for you Order Now Currently the United States and Canada receive 20% of their electric power from nuclear plants. The rest of the world is at 6% but rising. The benefits drive the nuclear energy movement and continue to do so and the proponents of nuclear power see this as an indispensable solution in reducing the consumption of conflict-ridden fossil fuels. Opponents of nuclear power also make a strong case citing cost, safety and justified global concern of waste storage and the potential for nuclear weapons in areas where terrorism is a major concern. These plants provide the uranium and plutonium regarded as critical components of nuclear weapons. This will be discussed in depth in this paper. This paper will also detail the benefits and detriments of the future growth of nuclear power plants across the globe. The first uses of nuclear technology were the bombs dropped in Japan in the 1940’s. In the 1950’s physicists and engineers harnessed this power and presented it as a less costly and an alternative form of energy. Nuclear power plants were built with an eye to safety; this was the main concern early on. The 103 reactors in the U. S. today supply 25% more electricity than 109 reactors did a decade ago. This has been achieved through improvements in management, reliability and productivity. In 2010, Taking Sides, Clashing Views on Environmental Issues states that favorability to nuclear energy was running at 67% of Americans in favor of using this technology. The gap of people against this was closing. These companies were being seen as valuable and all operating licenses were being renewed. Impressive gains in output and reliability at many nuclear power plants have the industry looking to build more plants. Nuclear power is being accepted as the core strength of the U. S. electric supply. And in this â€Å"green† era, nuclear is seen as the main source of assisting the U. S. in meeting clean air goals. The Clean Air Act of 1970 set out to improve air quality and nuclear power plants are credited as one big reason that compliance was met. Electric vehicles and hybrid electric vehicles are becoming more in demand and the clean electricity from nuclear power is driving policymakers to continue to support nuclear technology. These vehicles reduce carbon emissions, noise, maintenance and reduced oil usage and reliance on foreign oil. Clean energy is paramount to a sustainable development globally. As the population continues to grow, the demand for energy increases and harnessing wind and solar should increase because they are good options and do not contribute directly to air or water pollution. These renewable fuels contribute in a positive way to a sustainable world but they just don’t produce enough electricity yet, they are considered good alternate options in conjunction with nuclear energy. The nuclear age started with the thought of this form of generating electricity being less costly. That did not prove to be the case, in the beginning, but today nuclear energy is once again being heralded as a value proposition. The volume of electricity that can be produced and done so in a clean and safe way is looked at as a way to provide environmental attributes and price stability. The Department of Energy’s Nuclear Power of 2010 program created a partnership between government and industry and ensured adequate funding for the building of new plants. The planned investment was $650 million dollars over several years and assists with the need of program stability and resources necessary to ensure future viability. The U. S. faces an imminent energy crisis and even though electric power is only 3 to 4 % of our gross domestic product, the other 96 or 97% depends on that to fuel our $11 trillion dollar economy. Nuclear energy will remain a front runner because of the reliable and continuous source of energy it provides and it allows us, as a nation, to lead the world in decreasing our dependence on fossil fuels. Coal is abundant across many parts of the globe but contributes to global warming (there is research and development in developing a â€Å"clean† coal and this has been proven viable but bringing it to market at a competitive price has not happened). Natural gas is also fairly abundant but unsustainable in power generation and makes little sense. This being said enhances the argument for nuclear energy plants to assume that the future plants being built will continue to grow worldwide and that as this continues, the industry will strive to address cost and bolster safety. The other side of this issue sheds a different light on the same subject. The expense of nuclear energy is measured differently. Financial expense is a factor but fear is the most major concern. Nuclear energy has no pollution or emissions but the by-products of the process namely waste, and how it is stored, transported and discarded is regarded by many as the downside of nuclear energy. The safety of power plants was the original concern but as these expanded across our country and the world, the waste has come to be a mightier concern from the holding and containing in plants, to the transporting over highways and ultimately the storage of these toxic materials, with a half-life of a thousand years. The potential harm of radioactive waste is to humans, wildlife and the environment. This waste contains plutonium, uranium and other elements along with parts of atoms. Nuclear waste needs to decay following a cooling process. Even after the waste has been out of the reactor for 10 years, a human coming within a meter of it would die in three minutes. Waste from the first generation of reactors has not been successfully dealt with and that said, this leaves all reactors that followed looking toward a solution and the prediction of over a 100,000 metric tons of waste by 2035 that needs to be completely isolated from the environment for tens or even hundreds of thousands of years because it is so deadly. You read "Nuclear Power: Problem or Solution" in category "Papers" Sendai, Japan had an 8. 9 earthquake on March 11, 2011 that was followed by a tsunami of immense proportions. There was a nuclear power plant in operation called Fukushima-Daiichi that continues to be in the news more than six weeks after the disasters and the story continues to unfold. The first thing to point out, in fairness, is that these were unlike Three Mile Island and Chernobyl because the problems that resulted were not the result of human error. The built in safety measures detecting an earthquake worked and as soon as the quake was detected, the plant started an automated, preprogrammed shut down and all the safety elements were working to achieve a cooling and treatment of the decay heat. Diesel generators provide the power to drive the pumps for the water coolant necessary to circulate through the reactors, removing the decay heat but when the tsunami hit, the diesel generators that were necessary to provide power necessary for the pumps was lost. There were other backup systems but they too were lost and the fear of melt down and radiation being spewed into the atmosphere ensued. Heat removal could have continued indefinitely if there was power but that was not the case due to the tsunami. Radiation levels are high and more than 6,000 families in surrounding cities have been told to leave the area. Minor traces of the radiation were found in the drinking water in my state, Massachusetts and this drives home the point of how small our world has become and why we all need to be better informed of the world around us. Radiation and its side effects are nasty and can take years to manifest illness and cancers. There are also some discrepancies on how much area should be evacuated and there are many varying reports. The U. S. cientists seem to share a common number of 50+ miles, Japan is saying 12. The Fukushima-Daiichi nuclear plant problems echo most people’s concerns about nuclear safety and have started a concentrated look at nuclear power plants that are built in earthquake prone areas. This concern has spread to Germany where more than 60,000 protestors have been assembling outside the major nuclear plants in that area. The IAEA (International Atomic Energy Age ncy) is trying to assure people around the world that new safeties were already on the drawing board addressing issues like the one in Japan. Nuclear energy had been enjoying resurgence with relative calm before the tragedy in Japan. India and China had a plan to add a thousand new nuclear sites in the next two decades. Japan nuclear facilities have withstood many earthquakes; the tsunami is what brought this one down. Opponents are still focused on the long term and the storage, handling, transporting and long term storage of the hazardous waste that is a lethal by-product of nuclear energy. The following is from www. wagingpeace. org and states the risks in a succinct way: ?Nuclear Waste ?Nuclear waste is produced in many different ways. There are wastes produced in the reactor core, wastes created as a result of radioactive contamination, and wastes produced as a byproduct of uranium mining, refining, and enrichment. The vast majority of radiation in nuclear waste is given off from spent fuel rods. ?A typical reactor will generate 20 to 30 tons of high-level nuclear waste annually. There is no known way to safely dispose of this waste, which remains dangerously radioactive until it naturally decays. ?The rate of decay of a radioactive isotope is called its half-life, the time in which half the initial amount of atoms present takes to decay. The half-life of Plutonium-239, one particularly lethal component of nuclear waste, is 24,000 years. ?The hazardous life of a radioactive element (the length of time that must elapse before the material is considered safe) is at least 10 half-lives. Therefore, Plutonium-239 will remain hazardous for at least 240,000 years. ?There is a current proposal to dump nuclear waste at Yucca Mountain, Nevada. ?The plan is for Yucca Mountain to hold all of the high level nuclear waste ever produced from every nuclear power plant in the US. However, that would completely fill up the site and not account for future waste. ?Transporting the wastes by truck and rail would be extremely dangerous. ?For a more detailed analysis of the problems of and risks incurred by the plan, see Top Ten Reasons to Oppose the DoE’s Yucca Mountain Plan ?Repository sites in Australia, Argentina, China, southern Africa, and Russia have also been considered. ?Though some countries reprocess nuclear waste (in essence, preparing it to send through the cycle again to create more energy), this process is banned in the U. S. due to increased proliferation risks, as the reprocessed materials can also be used for making bombs. Reprocessing is also not a solution because it just creates additional nuclear waste. ?The best action would be to cease producing nuclear energy (and waste), to leave the existing waste where it is, and to immobilize it. There are a few different methods of waste immobilization. In the vitrification process, waste is combined with glass-forming materials and melted. Once the materials solidify, the waste is trapped inside and can’t easily be released. The final concern for the purpose of this paper goes back to the second to last point from wagingpeace. org. The U. S. is banned from reprocessing nuclear waste because those materials are necessary components when making a bomb. There is a volunteer group called the National Supplies Group (NSG) and they enforce guidelines to members and oversee exports to ensure that the technologies and materials are treated properly and are not being used to contribute to proliferation. The NSG has 46 member states but Israel, India and Pakistan are not among them. This is frightening and makes one question why it is not mandatory to be part of this NSG. It seems that the rules should be the same for each state or country when dealing with nuclear energy and makes one wonder what the IAEA contributes. Nuclear energy is complicated. If I was writing this before the March 11, 2011 disasters in Japan, I would be impressed by how far the industry has evolved. Natural disasters are just that, natural and occurring more and more. The strength of Hurricane Katrina was blamed on global warming and makes me wonder if we had more nuclear energy would the storm have been less severe. I don’t know that I gave a lot of thought to nuclear energy before this course and it seems that many movies I have seen over the years usually involves smuggling of components necessary for use in weapons of mass destruction. It now appears that this is a very real threat and one that needs full worldwide regulation. I think nuclear energy is here to stay and that the growth will be immense to keep up with the population and to decrease emissions. This product is a bit of an enigma to me. It strives to do good but has the potential to create so much evil. Nuclear energy and all it’s by-products are very complicated. How to cite Nuclear Power: Problem or Solution, Papers

Overcoming Misfortunes in Siddhartha Hesse Siddhar Essay Example For Students

Overcoming Misfortunes in Siddhartha Hesse Siddhar Essay tha Essays Overcoming Misfortunes in Siddhartha On page 132 we read Everything that was not suffered to the end and finally concluded, recurred, and the same sorrows were undergone. What does this mean in regards to Siddhartha and any other of the characters in Hesses story? Do you agree with this statement? Explain. This quote is taken from the context of when Siddhartha is crossing the river and he sees his reflection and it looks like his father. This quote refers to a repeating of events. It is illustrated by Brahmin being separated from Siddhartha and Siddhartha being separated from his own son. This parallels the quote in three ways. Taken literally it identifies the father-like-son aspect of the situation. It can be taken as a metaphor for the endlessness of time as well. Taken out of context, this quote identifies that anything that is not followed or completely worked through will continue to exist and it will repeat itself. Siddhartha left his father, Brahmin, at a young age to join the ascetics. Siddhartha is now considering the pain his father must have gone through not seeing his son again. Siddharthas son, too, was separated from his father. Without dealing with this situation, the distance between father and son would never be reconciled. Thus the situation Siddhartha had with Brahmin would be repeated. The quote can also be interpreted as a metaphor for time. Obvious recurrences can be noted in time, suggesting that time repeats itself. Instead of a river, another symbol can be used for time, perhaps a pool. According to this quote, things repeat themselves in time. In a pool objects float around until they finally make their way to the outlet. Events swirling around in time without reconciliation are trapped until they are dealt with. The entire pool makes up all that time is. All the experiences and thoughts of past, present, and future that have not been dismissed all contribute to the whole of time. If the quote stood alone, without the context of Siddharthas reflections on his father and his son, it would state that anything that isnt finished through completion would forever hang in the cloud of time. Every thing that has not suffered to the end If something is not carried on to completion, it will repeat itself until the initiative is taken to finish it. .. .recurred, and the same sorrows were undergone. I can identify with this quote because at time I am prone to over committal. I will devote myself to too many things and I cannot physically complete them all. Thus there is always a shadow of stress and incompletion hanging over my head. This quote is especially effective because it deals with the sorrows that are to be endured until completion is pushed through. In summary, I believe that the quote is a motivating factor for Siddhartha to overcome the incomplete misfortunes of his past. When the undealt with problems of his past are dealt with, he can concentrate on living in the now and not being controlled by his past. Siddhartha realized that he must move forward in time, recognizing his past only as contributing factors to what he is. Siddharthas being encompasses more than just his experiences but also how he is prepared to deal with future situations. .