Adam Powell free essay sample

One of the most powerful and influential civil rights leaders in American history, Adam Clayton Powell was one of the pioneering men ever to be advocates of African-American rights in the 20th century. He was also a Baptist minister and the first African-American Congressman from New York (Haskins 1974, 24). Powell was born Adam Clayton Powell Jr. on the 29th of November 1908 in New Haven Connecticut to Adam Sr. who was a Baptist minister and real estate businessman (Ragsdale and Treese 1996, 113) . When Powell was only 15 years old, he enlisted and joined the African Nationalist Power Movement of the then-famous African American rights leader, Marcus Garvey. In 1926, the younger Powell commenced his tertiary studies at Colgate University where he earned his A.B. in 1930 and a year later he earned his M.A. at Columbia University, in religious education. With regards to Powell’s ministerial career, he was named successor of Adam Powell Sr. We will write a custom essay sample on Adam Powell or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page as the senior pastor of Harlem’s Abyssinian Baptist Church. But even before his appointment, Powell, thereafter graduating from Colgate, had initiated the fight for civil rights equality, as he had precipitated the fight of African Americans during the Depression, fighting for the equality in jobs, decent housing and racial discrimination and segregation; his stand was seemingly aggravated because at that time, the Great Depression was at its pinnacle. One among his famous fights was against the refusal of commercial giants like Bell Telephone to hire African-American employees. Powell initiated mass meetings, rent strikes, boycotts of public transportation, to further forward the grievances of the African American community regarding mistreatment and prejudice and to urge the hiring of African Americans in transit companies. At the worst, Powell criticized the administration for its difference concerning civil rights (Luker et al. 1993, 423). His cause was only bolstered by his election to the New York City Council in 1941 (Zelizer 2004, 563), where he resumed his fight to provide fellow African-Americans with decent living and fend off destituteness. The latter malady was he was the staunchest adversary of, for the well-known soup kitchen in Harlem was the epitome of his concern; it helped cloth thousands of impoverished Harlem blacks (Wintz and Finkelman 2004, 991). The almost holy presence of Adam Clayton Powell in the lives of unfortunate was somewhat cemented when he was elected into Congress, the first African American to do so since William Dawson represented Chicago. Even when Powell was already Congressman he was not immune from racism even in Congress, as he was treated as if he were not a man of position who commanded respect and courtesy. Powell was astounded but provoked when he was initially prohibited to use public amenities in the House of Representatives. During the course of his Congressional term, Powell frequently challenged Southern advocates of racial segregation to debates. In the facet of segregation, Powell toiled for the abolition of it in the United States Military. Moreover, he initiated moves to convince the senate to outlaw Jim Crow laws within American jurisdiction. Later in his public service career and after nearly two decades in Congress, Powell was again doing the American people a service as he was named the chair of the Education and Labor Committee (Ragsdale and Tresse 1996, 115). While in office, he pushed for the increases of the minimum wage, special education for the physically handicapped as well as the improvement of the quality of primary and secondary education. As the 1960’s inched, Powell was instrumental in the implementation of social programs for the disadvantaged of Presidents Kennedy and Johnson, the â€Å"New Frontier† and the â€Å"Great Society†, respectively.   But on a large scale, the â€Å"Powell Amendment† was by far his most important contribution, as it called for the stop of the flow of federal funds to organizations practicing racial discrimination. Summing up the great life his great life, Powell merely wanted African Americans to be reborn (Powell 1945, 57).

Writing Excuses 9 Actionable Tips to Overcome Writing Excuses for Good

Writing Excuses 9 Actionable Tips to Overcome Writing Excuses for Good Writing Excuses: 9 Actionable Tips to Overcome Writing Excuses for Good We all make writing excuses for various reasons and it slows down our progress for writing a bookPublilius Syrus once claimed: Every vice has its excuse ready. And writing is no different.In this article, we will uncover the kind of excuses we make and provide you tips on how to overcome your writing excuses.So stay put! Learn. Practice. And soar.Here are our tips for how to overcome writing excuses:Find your voiceAvoid the non-native speaker debateDevelop a writing habitCut back on social mediaDont procrastinateStop fearing the fallDisability is not inabilityStrive for progressGet rid of writers blockNOTE: Want to learn how to not only publish a book, but do so in a way that sets your book up for long-term success? We teach exactly that in our VIP Self-Publishing Program. Learn more about it hereWhat causes writing excuses?There are a plethora of reasons writers give for letting excuses take over their work.Sure, some are the real-life instances you may connect with, and others are cheesy ideas saved in your head.You are likely to find reasons like toddler trouble, age, illness, time, little knowledge, to creativity blocks still making headlines in the writing community as the biggest launchers to writing excuses.But do you know what? Only you can let go of all excuses- and we at Self-Publishing School are here to help you along the way. The common excuses which prevent us from writing or self-publishing: Im not a native English speaker, can I still write? What is the right age if you want to self publish? I am 14 years old; do I stand a chance? Writers block (which we cover solutions to below) I am still learning how to write. I have little vocabulary knowledge: what should I do first to be a writer? Life problems/disability. Waiting for the perfect time to write. Looking for good writing tips. Fear of failing or falling. Looking for a book genre or how to start a story. Laryngitis. I want to write a script; what should I do first? Ill do it later.How to over come writing excuses with easeThe late Great Louis La Moore, the prolific author of over 100 books, once said he could write on a busy street corner: that was years back where authors used a pen, a paper, or a typewriter to create text.Imagine the benefits you can add to your writing in this era of the iPhone, tablets, and cloud apps that allow you to write on the go? First.#1 Find your voiceUsually, we learn writing by imitation: but no matter how you view it, Laryngitis will only add poison to your book.I know you may love how JK Rowlings writes or Neil Patels variety, but I can tell you that drifting away from your voice will be a bane to your book.How?Remember the creativity slowdown I mentioned earlier?When the author completes his piece, you are blank, with no ideas for your essay. You have nothing fresh to add after you finish comparing your writing to the author you are reading.The magic to fighting ensuing excuse from Laryngitis is finding your voice in writing. But thats only half of it.Here are other kick-butt methods to find your writing voice:Writing more every day.Write your draft freely without editing or looking at another persons work.Write and research later: or research but take a break before you engage in the writing process.Plot all your plans for writing a novel and ideas on some paper or notebook whenever they pop.Read more from different authors, publications, and manuscripts.Get creative with your work or content.Write with the buyer persona in mind.Get laser-focused with your writing or content by selecting a niche and a language.#2 Avoid the native/non-native English speaking debateClient: Native English speakers only.Writer: But I am not native!I hear this phrase a lot in the writing community, especially from clients who want their book/content written by Anglophone writers.But frankly speaking, I have never understood the debate or the relationship between native and non-native speaking to writing unless one is writing on relig ion, culture, cuisine, or destinations nuance.What should you do then if you are not a native English speaker?Many great writers are native English speakers. However, writing should not only be in the English language but in other languages too! And being a native does not equal writing well.Here is how to win this debate: You can write in your native language and use a service like Google translate to translate phrases and words to other languages.If you want to focus on English, read English books, the dictionary, thesaurus, and journals on the niche you want to write.Practice writing in the English language.Watch English films and movies (not the Housewives thing).Stop using autocorrect while writing.Invest in your education, learning the language.Use online writing assistants like Hemingway editor to bring clarity in your writing.You can also seek inspiration from the likes of Prof Ngugi Wa Thiong and Chinua Achebe who are not native English speakers yet, have published books in the English language and even received international accords for their persuasive writing.#3 Develop a writing habit and strategyPlanning is a necessary process in any persons life not only for corporates but writers too.If you do not plan, you plan to make writing excuses! It is that simple.The building blocks you create in the planning process will inspire you to reach your goal of completing that book. It will help you avoid replacing writing with watching The Game of Thrones, buying groceries, browsing for advice and settling toddlers or cat mischief and excuses.Tip on making a successful plan:Designate a specific time for writing and reading.Set targets.Push yourself.Create a content calendar and a place where you find writing prompts or exercise to kill writers block.Test your progress after a week or a month.Make a list of what you want to achieve. It can be in sticky notes on a wall or laptop for affirmation.Set reminders to give you the push and inform you when its time to do groceries, shopping, or writing.Create realist goals on the number of words you want to write in a day. For me, I love using 750 words.com for setting and achieving my daily writing goals.Here too are our favorite writing software you can use in planning, time management, improve productivity, and kill those writing excuses:Chrome Plus Time Tracking AppToogllWunderlistGoogle calendarCoffitivityFocusMateEvernote#4 Use social media lessHow often do you use social media? Once a week? A day? Every minute?It is true social media has got a tremendous influence and opportunities these days. It has created jobs, made communication, information, and knowledge more manageable. But it has also contributed to time and resource wastage not forgetting making the world louder.Studies show on average; we spend close to three hours every day on social media slacking off watching memes or viral content yet, we could use this time to improve on our writing skills.Take, for example. You take an hour to write 1,000 words. You could reduce the number of hours you spend on social media to two, and the other on writing.Social media is also not just a place for watching memes, but thankfully, a platform to develop writing habits. You can write on LinkedIn writing, Tumblr, or even Facebook as you connect with friends and family.Other ways to get over being hooked on social media:Turning off notifications so you can concentrate on writing.Use an app like Zen writing app or the ones mentioned in #3, which keep track of what you do.Write before you engage in another activity. This will make you want to write faster since you want to move to the next commitment.Let your desire for writing be numero uno.Make the environment conducive for writing.Join writing groups like the Self-Publishing School Mastermind Community: an excellent place to find inspiration from those who share or overcome similar challenges and excuses.How to succeed in writing groups to get over writing excuses:Joi n relevant writing groups worth your time.Connect with authors and publishers through personal chats for advice and inspiration on places such as Scribophile.com or professional associations for writers and editors.Ask only relevant questions and be on point to get the most answers out of your questions.Build a rapport.Connect, network, and engage in each case.Never let social media take charge of your life.Take advantage of its hidden gem and use social platforms as an inspiration to arouse your creativity and bring back your writing mojo.#5 -Avoid procrastinationIf its not easy to start, it will be hell to finish. -  Niklas GÃ ¶keProcrastination is the biggest thief of creativity, progress, and success. It is an enemy you must conquer at all cost.Whatever it is that you may not want to write now, stop waiting for the right time, age, or when the right resources are available to start.Today, the community has got many great resources. You can write on your phone, table t, or a pocketbook. You can also use platforms like LinkedIn, Medium, or Tumblr to share your stories: or use a tool like Jami Gold Save to plan your novel if you are starting in this art.Remember also the Great Louis La Moore words on being able to write on any busy street corner.Any place, any time is an opportunity to write: not procrastinate.Note: For your writing to work, you need to be in the writing factory and not embrace the excuse factory.#6 Dont fear to fallThere is a lot that goes into self-publishing a book: drafts, outlines, revisions, finding a publishing company and eventually marketing and selling to the public who receives it with mixed reactions.Guess what happens during all this process?Frustrations, name shaming, trolls, in-your-face insults, and horrible reviews with straight-up lies.If this has been the case, keep the fire burning and kill the negative energy in this way:Make a list of all the life lesson and use them for motivation if you lack the inspirati on.Keep a list of your favorite motivational quotes.Take Sir Richard Bransons offer challenging readers to write letters to their younger self how to navigate life.Make a list of your habits positive and negative.Write of your failures and how you plan to succeed.Have faith which gives powers and action to thoughts. Most people develop excuses because they do not have faith in their writing.Finally, keep in mind that success waits on the other side of failure.#7 Disability is not inabilityAre you struggling with specific challenges in life? Maybe an illness, marital problems, family issues, anxiety, low mood, spouse abuse, or low self-esteem?Life has a unique way of furnishing us with problems- a thing the Bible captures: but it encourages us to overcome our challenges in a unique way.2 Corinthians 4:8-9: We are afflicted in every way, but not crushed; perplexed, but not driven to despair; persecuted, but not forsaken; struck down, but not destroyed.You may struggle with whatever challenges life throws at you, but do not turn them into writing excuses.Remember, excuses thrive well where problems exist. The many times you count the troubles you are experiencing, the more you will use them as a reason for not completing your book.To tow you out of the excuse mode, look up these five authors who succeeded in this art despite disabilities.Peter WinklerOctavia E. ButlerChristy BrownJean-Dominique BaubyFyodor DostoyevskyI also wish to encourage you to:Write a memoir or a biography, or on the challenges, you are experiencing.Write about your failures and shortcomings and how you plan to undo them.Find a mentor in writing groups, writing conferences, and co-working space.Ask an able sister, friend, or family member to assist where necessary.Use technology, especially those for voice, motion, and creativity.#8 Strive for progress, not perfectionWhen I started writing, I struggled to produce a well-polished draft. I hated rewrites and self-editing made me want to ram my head into a wall.But with time, I allowed myself to be scrappy.I realized that giving it all in my drafts held my back: it pushed me into the rabbit hole of procrastination, fear and made me look inept.You may aspire to be perfect at what you do, considering the good returns it brings. But perfection sometimes carries a poor reputation plagiarism, Laryngitis, and writers block.This is especially the self-judgment we impose on ourselves when we find our piece is not of the quality of bestsellers or garnered low reviews.While you may want to become a bestselling author; when starting, strive for progress and with time, harness the power of perfection through edits, second, or third editions. Remember the old saying of how to eat an elephant? One bite at a time.That your first piece never made headlines does not mean the next will experience the same fate.Aim for progress. Perfection is like success, a journey, having no destination: hence the doing is a lot more important than th e result.Here is a broad overview of how to aim for progress:Collaborate with other writers, making relationships with them, whether aspiring or professional.Seek reviews and feedback from beta readers.Find or pay an editor to help bring out your thoughts, ideas, and write more succinctly.Do an activity that will bring more clarity to your writing.Give yourself enough latitude to experiment and maybe fail a couple of times.#9 Writers block doesnt existIt is an excuse us writers use to shot our own feet when writing or publishing a book: then seek comfort in a community or in-crowds ailing of the same.Lets face it one more time: Writers block is a fancy term made up by whiners so they can have an excuse to drink alcohol. Steve Martin.Guess what? You can stop it.How? It often starts with finding the real ailment, some soul searching and admitting to yourself.The other list of things you can do to write without writers block goes here:Make a habit of writing ideas every day.Seek idea s from social media or writing groups.The Time is Now.Check out these story ideas to stir inspirationThese creative writing prompts.Ask your partner or friend for ideas if stuck.Go through some of these creative writing exercisesDo something unique at least every quarter. It can be a documentary, podcast, or something related to the writing you produce.So whats standing in your way from self-publishing? Not excuses, it is you. But we can fix that- here at Self-Publishing School- with a few shifts in the mindset.Ready to get rid of those excuses and get your book DONE?With this training, excuses are not a part of the equation. Basically, we help you work through your biggest excuses in order to achieve your main goal: write and publish your book.

Its a case study Essay Example | Topics and Well Written Essays - 2000 words

Its a case study - Essay Example In the consumer marketing segment, the company has given a guarantee to its customers saying that it would supply any item in any preferred color for five years continuously. So even if a single customer buys a particular product of a particular color, the company is forced to produce that particular product even if it is for a single customer in order to keep up its promise and at the same time safeguard its reputation. The company has got a process based production system which also has certain demerits. The main problem with the process based production system is that two or more jobs undertaken by the production department may come to the same department at the same time. And there is obviously no possibility that the department can work on the same jobs simultaneously. Hence on of the jobs has to be kept waiting. As Focus Plastics Plc., is involved in large scale production, the process based system of production may result in several jobs that may be kept waiting in various departments at different stages. Thus , it is nothing more than a mere waste of time when a major portion of production time actually comprises the time in which jobs are needed to wait for getting processes in different departments and at various stages. Another disadvantage with this kind of production system is that it requires greater employee skill, more employees training, more number of supervisors and complex produc tion control. If we consider the manufacturing system that is being followed by Focus Plastics Plc., it can be noticed that the company has got 24 large injection-moulding machines of different ages. Such machines would definitely need a person with good expertise and at the same time proper amount of training to handle such machines which actually is an expensive task for any organization. Problem 4: The company is also lacking in planning. It was quoted that it had to produce a huge amount of pasta strainers in a particular color which resulted in entire rescheduling along with a waste of one hour's production. This is because of over anticipation of the customers' demand. Problem 5: The company has also got a serious inventory problem. There has been a rapid increase in the inventory of the company over the past 10 years which is evident from the following ratios which are based on the financial information of the company. The major mistake that the company is committing is that it is producing the goods anticipating the customers' demands. But anticipations may or may not be right all the time. If the anticipation is less than the acute value, then the company may lead in to loss of sales. In this case the anticipation is more than the actual value and hence it is resulting in piling up of inventory. Actually, increase in the level of inventory may lead to the product getting outdated because of ageing. Increased inventory may also result in blocking of the working capital and thereby resulting in reduced cash flows. Though Focus Plastic Plc. has considered inventory as a

LEGAL ASPECT OF NURSING Case Study Example | Topics and Well Written Essays - 1750 words

LEGAL ASPECT OF NURSING - Case Study Example The physician is reluctant to perform the surgery because of the patient’s recent stroke. However, Mr. Suarez’s adult children are insistent that the surgery should commence. As the main caregivers, they are charged with the responsibility of managing their father’s health condition. It is for this reason they push for the best medical care for their father. In light of the unfolding events, there is an ethical dilemma. The ethical committee should act in the best interest of the patient. Due consideration should be made for the physician’s evaluation. There are few kidneys available for transplant but there are many patients in need of kidney transplant. Unfortunately, many patients have succumbed to death during the waiting period. It is disheartening that there is a worldwide shortage of kidneys available for transplant. Potential kidney donors are living donors or deceased donors. For deceased donors they can either be non-heart beating donors (donatio n is made after cardiac death) or heart beating donors (donation is made after brain death). There has been an increase in the kidney donations made by both living donors and non-heart beating donors, but the donations from heart beating donors have declined. ... Given Mr. Suarez’s cardiac complications, a cardiac evaluation is necessary. Physical examination and history is essential for transplant candidates. Patients exhibiting cardiac failure are highly predisposed to cardiovascular events peri-operatively and post-transplantation (Suphamai &. Danovitch, 2007). Abnormal ECG results would warrant further cardiac evaluation. Mr. Suarez’s age is above 50 years, and a stress test should be administered. However, there is need to appreciate the current critical health state of the patient. Several independent medical experts on kidney transplants should be consulted by the ethics committee. They should give a report of the expected kidney transplant in light of the hemorrhagic stroke. There is need to determine if the stroke is a major risk factor that predisposes the patient to a critical health state. If there is a high possibility of an unsuccessful surgery, Mr. Suarez’s eligibility for a kidney transplant declines. The kidney transplant is for the purpose of saving a life and if there is a likelihood of an unsuccessful surgery, it would not be ethical to select Mr. Suarez as a kidney recipient. Comprehensive information is required on the physical and mental health state of Mr. Suarez. Mortalities are mainly caused by malignancy, infection and cardiovascular disease as they are the main complications arising from immunosuppression in the majority of kidney transplant recipients. The transplant assessment process also requires a comprehensive evaluation of Mr. Suarez’s psychosocial, medical and surgical history (Pham et al. 2010). This evaluation is a challenge for transplant physicians as they have to screen for complex medical issues in potential candidates, and another challenge is the non

Leadership Essay Example | Topics and Well Written Essays - 250 words - 63

Leadership - Essay Example ccording to Zenger and Folkman, the plan action method works when our leadership performances are not encouraging, hence we ought to apply the action plan method to the issue and try to improve our performances. The approach to change the plans suggested by Zenger and Folkman is also known as the Linear Development Model. This model gives the current performance which determines the performance we desire in the future. The future performance gives our customers and those we lead the confidence in our profession and organizations. (Zenger and Folkman, 2009, p. 196) Secondly, we are educated on how we can approach development. The plans used in this case are the linear plans. The book focuses on helping leaders to change from poor performance to better one. The linear plan is a unique perspective that helps us to change and develop our leadership skills for better performance in the organization. However, Zenger and Folkman hit a warning to us trying to apply exceptional changes on explicit competences. This might hinder our leadership improvement as they say (Zenger and Folkman, 2009, p.217). In conclusion, the above plans suggested by Zenger and Folkman, might be effective and useful perspectives in improving our leadership skills. If well applied, the linear plan and the action plan new insights and approaches to better leadership skills which definitely improve the performance of the

Very Large Telescope and NACO Instrumentation

Very Large Telescope and NACO Instrumentation This report describes the Very Large Telescope array in Chile, the VLT consists of four Unit Telescopes with main mirrors of 8.2m diameter and four movable Auxiliary Telescopes with main mirrors of 1.8m diameter. One of the Unit Telescopes, UT 4, is discussed in more detail, specifically its location, mounting, optics, the range and focus locations and the available instruments. The last part of the report is an example of an observation planning to image the Becklin-Neugebauer (BN) object with the NACO S13 camera and K band filter. Introduction The Very Large Telescope array (VLT) is at this moment the worlds most advanced optical instrument (1), the VLT is located on the Paranal Observatory, see Figure 1, in the Atacama desert Northern Chile (70 ° 24 11 West; 24 °3731 South). The Paranal mountain is probably the best site for astronomical observations in the southern hemisphere, with e.g a humidity of 5-20% and a maximum rainfall of about 100 mm per year. The observatory is divided into two areas, a telescope platform at the top of the mountain at an altitude of 2635 meters. and a base camp at the foot at an altitude of 2360 m. The observations take place at the telescope platform, the base camp contains staff quarters, maintenance facilities, including a visitorscentre for the public. Overview of the VLT The VLT consists of four identical Unit Telescopes (UT) with main mirrors of 8.2m diameter and four movable 1.8m diameter Auxiliary Telescopes, located on the telescope platform, see Figure 2 . The Unit Telescopes are Ritchey-Chrà ©tien telescopes, they can operate in Cassegrain, Nasmyth or Coudà © focus. The four Unit Telescope have an altitude-azimuth (alt-az) mounting (2). The Unit Telescopes have fixed locations, the Auxiliary Telescopes can be repositioned on 30 different stations, the UT and AT telescopes can be used in several different modes: independent telescope mode combined coherent mode or VLT interferometer (VLTI) combined incoherent mode In the independent telescope mode each UT is used separately, in the combined coherent mode the UT and AT telescopes work together, in groups of two or three, to form a giant interferometer giving an angular resolution equivalent to a telescope with a diameter of 200 meters and in the combined incoherent mode the four UTs are combined providing the total light collecting power of a 16-metre single telescope. For the four Unit Telescopes, names of objects in the sky in the Mapuche language were chosen and they are now known as Antu (UT1, The Sun ), Kuyen (UT2, The Moon ), Melipal (UT3, The Southern Cross ), and Yepun (UT4, Venus as evening star). Unit Telescope 4 (Yepun), see Figure 3 is discussed in more detail in the next section The VLT instruments includes large-field imagers, adaptive optics corrected cameras and spectrographs, high-resolution and multi-object spectrographs operating at wavelengths ranging from deep ultraviolet (0.3 nm) to mid-infrared (24  µm). With these instruments important data can be collected for a large range of research topics such as: formation and evolution of galaxies search for extra-solar planetary systems distances to galactic Cepheids circumstellar disks around young stellar objects active galactic nuclei stellar evolution fundamental parameters of the Universe Unit Telescope 4 Optical set-up Unit Telescope 4 can operate in four foci two Nasmyth, one Cassegrain and one Coudà © focus (2), for the optical lay-out, including the eight mirrors (M1 to M8) and the main dimensions see Figure 4. Light is collected by the primary mirror M1 and concentrated by the secondary mirror M2 either to the Cassegrain focus below the primary mirror or to one of the two Nasmyth foci, at the side of the telescope. In the Nasmyth configuration the optical layout is of the Ritchey-Chrà ©tien type, the Cassegrain focus however is not of the Ritchey-Chrà ©tien type, changing between the two foci means repositioning of the secondary mirror and changing the curvature of the primary mirror. By transferring one Nasmyth focus to another location in the telescope basement the Coudà © focus is obtained (mirror M4 to M8), from the Coudà © focus the light can be sent to the combination mode focus or to the interferometric focus. The Coudà © focus is located below the main telescope structure. The primary mirror (M1) The 8.2 m primary mirror of UT4 is made of Zerodur and is 175 mm thick the shape is actively controlled by means of 150 axial forces actuators, the mirror has a central hole of about 1.0 m. .Zerodur is a glass-ceramic made by Schott Glaswerke AG (Mainz, Germany). The secondary mirror (M2) The secondary mirror is a convex hyperbolic mirror made of Beryllium with an external diameter of 1.12 metres and a thickness of 50 mm. By changing the position and orientation of the mirror it is possible to correct some optical aberration of the telescope (defocus and decentring coma) and to change the pointing . The secondary mirror is supported by the M2 Unit at the top of the telescope and reflects the light from the M1 mirror towards the M3 plane mirror The optical quality depends on the mode of the mirror, if the mirror is in the active mode (active optics correction in operation) , the Central Intensity Ratio is larger than or equal to 0.98, with an atmospheric coherence length of 250 mm at a wavelength 500 nm. In the passive mode, active optics correction not in operation, the root mean square (RMS) slope error of the surface of the mirror is less than 0.7 arcsec. The tertiary mirror (M3) The tertiary mirror is flat and elliptically shaped (890x1260mm2), the mirror is made of Zerodur and produced by Schott Glaswerke AG. In Nasmyth configuration, see Figure 5, the M3 mirror deflects the light beams towards the scientific instruments located at one or the other Nasmyth focus. In Cassegrain configuration, Figure 5, the M3 mirror assembly is remotely flipped in towed position, parallel to the axis of M3 Tower. Mirror M4 to M8 ( the Coudà © train) The Coudà © Train is based on a combination of cylindrical and spherical mirrors, the light is sent to the Coudà © Train by mirror 4 (M4) a concave cylindrical mirror in front of the Nasmyth adapter. Relay optics provide an image of the sky at the Coudà © focus, the relay optics consists of the following mirrors: M5 a concave spherical mirror (R = 8975 mm) M6 a concave cylindrical mirror (R = 290,000 mm) , the cylinder direction is rotated by 90 ° with respect to M4 M7 a concave spherical mirror ( R = 5176.2mm) M8 a flat mirror. Technical description The telescope mounting of Unit Telescope 4 (3) is altitude-azimuth (alt-az), the telescope tube moves around a horizontal axis (the altitude axis ), the two bearings which support the telescope tube are mounted on a fork rotating around a vertical axis (the azimuth axis) The telescope tube is a steel structure, supporting at the bottom the primary mirror (M1) , and at the top the M2 Unit, with the secondary mirror, by metallic beams (spiders). Unit Telescope 4 is protected by an enclosure, this enclosure also provides access for operation and maintenance to certain areas of the telescope and a protection against the wind during observations. The telescope is mounted on a concrete foundation, the telescope pier. The geographical coordinates of UT4 are: latitude 24 ° 37 31.000 South and longitude 70  ° 24 08.000 West The structure of Unit Telescope 4 consists of a large number subassemblies and parts see Figure 6 , some of the main assemblies are: the tube structure with the M2 spiders which hold the M2 unit . the fork structure with two Nasmyth platforms that support the Nasmyth instyruments. the Coudà © tube that provides the interface to the Coudà © mirror units. azimuth tracks which support the fork structure. an azimuth platform which provides access for the Cassegrain instrument. Specifications Adaptive and active optics UT4 has adaptive optics (AO) correction both at Nasmyth and at Cassegrain foci, UT4 is also equipped with a sodium laser guide star facility for active optics. For the non-AO telescope operation the Central Intensity Ratio (CIR) quantifies the image quality. A high CIR implies high signal throughput, high contrast and small image size. The peak signal in the long-exposure point spread function is given by (4): Equation where is ta the transmissivity of the atmosphere, r0 the coherent wave-front size, tt the transmissivity of the telescope optics, D the diameter of the telescope and CIR the Central Intensity Ratio. The Central Intensity Ratio defined by : Equation where y0 is the Strehl ratio of the telescope. (Strehl ratio is the ratio of peak diffraction intensities of an aberrated wavefront versus a perfect wavefront). The optical quality specification is that the Central Intensity Ratio CIR = 0.82 with a coherent wave-front of size r0 = 500 mm (seeing angle 0.2 arcsec) at = 500 nm. Field of view The total field of view (FOV) for UT4 in the Cassegrain focus is 15 arcmin, in the Nasmyth focus 30 arcmin and in the Coudà © focus 1 arcmin. Atmospheric dispersion The atmospheric dispersion is corrected up to zenith angles of 50 ° for instruments requiring high image and spectrophotometric quality. Pointing and tracking UT4 is able to get any target to within 70 ° zenith distance in less than 3 minutes. Offset pointing of 45 ° and 60 ° in altitude and azimuth respectively is possible within 35 seconds, to within 0.1 arcsec accuracy. UT4 tracks better than 0.05 arcsec RMS over a period of 15 seconds without using guide-star position information, and over a one hour period when using guide-star tracking. Zenith distance The UT4 can operate at zenith distances ranging from 0.5 ° to 70 °, obstruction by adjacent enclosures is limited to zenith angles larger than 60 °. Instrumentation The instruments that are mounted on Unit Telescope 4 are shown in table 1. HAWK-I HAWK-I is a near-infrared (0,85 2.5 µm) wide-field imager installed at the Nasmyth A focus of UT4 , the operating temperature of the instrument is 120 K, operating temperature of the detectors is of 80 K (3). HAWK-I has 10 observing filters placed in two filter wheels: Y, J, H, Ks , 6 narrow-band filters Brg, CH4, H2 and three cosmological filters at 1.061, 1.187, and 2.090  µm. SINFONI SINFONI is a near-infrared (1-2.5  µm) integral field spectrograph installed at the Cassegrain focus of UT4. The spectrograph works with 4 gratings J, H, K, H+K with spectral resolutions of R is 2000, 3000 and 4000, corresponding to the J, H and K gratings respectively, and R is1500 with the H+K grating. The resolution power R of a spectrograph is given by : Equation where c is the velocity of light and dv the radial velocity . NACO (NAOS + CONICA) The Nasmyth Adaptive Optics System (NAOS) and the High Resolution Near IR Camera (CONICA) are installed at the Nasmyth B focus of UT4. NACO provides adaptive-optics corrected imaging, polarimetry, spectroscopy, and coronagraphy in the 1-5 ÃŽÂ ¼m range. The NACO instrumentation will be discussed in more detail in the next section. Laser Guide Star The Laser Guide Star is an artificial source, a 4W CW Sodium Laser (589 nm) will be used for this. The laser beam is focussed at an altitude of 90 km, at that height an atomic sodium layer is present which backscatters the spot image, producing an artificial star with a magnitude range from 11 mag. to 14 mag. NACO instrumentation Instrument characteristics NAOS NAOS is an adaptive optics (AO) system that has been designed to work with natural guide stars (NGS) and moderately extended sources , NAOS can also use the laser guide star facility (LGSF) and a natural tip-tilt source (TTS) to provide adaptive optics correction (3). NAOS gives a turbulence corrected f/15 beam and a 2 arcmin field of view to CONICA. Two off-axis parabolas re-image the telescope pupil on the deformable mirror and the Nasmyth focal plane on the entrance focal plane of CONICA. A dichroic-filter splits the light between CONICA and the wave front sensor, a field selector is placed after the wave front sensor input focus to select the reference object for wave front sensing, see Figure 7. NAOS has two wavefront sensors one visible light and one near-IR sensor , the two sensors are of the Shack-Hartmann type. It is possible to select an off-axis natural guide star within a 110 arcsec diameter field of view (FOV). NAOS allows wave front sensing with faint natural guide stars and extended objects, observations of very bright objects are possible with the visible wave front sensor using neutral density filters. CONICA CONICA is an infra-red (IR) (1 5 ÃŽÂ ¼m) imager and spectrograph which is fed by NAOS. CONICA is capable of imaging, long slit spectroscopy, simultaneous differential imaging (SDI), coronagraphy, polarimetry , with a large range of plate scales, filters and masks. The CONICA detector is a InSb Aladdin 3 array, the parameters of the array are: format 1026 ´1024 pixels pixel size 27 µm dark current 0.05-0.15 ADUs-1 pixel-1 wavelength range 0.8-5.5  µm Quantum efficiency 80-90 % The detector has three readout modes and four detector modes .The readout modes refer to the way the array is read out, the read our modes are : Uncorr The array is reset and then read once, used for situations when the background is high. The minimum detector integration time (DIT) is 0.1750 seconds. Double_RdRstRd The array is read, reset and read again, used for situations when the background is intermediate between high and low. The minimum DIT is 0.3454 seconds. FowlerNsamp The array is reset, read four times at the beginning of the integration ramp and four times again at the end of the integration ramp. Each time a pixel is addressed, it is read four times. This is used for situations when the background is low. The minimum DIT is 1.7927 seconds. The detector mode refers to the setting of the array bias voltage, four modes have been defined: HighSensitivity, HighDynamic, HighWellDepth and HighBackground. HighSensitivity has the fewest hot pixels, but it has the smallest well depth, this mode is used for long integrations in low background situations. HighBackground has the largest well depth but has many more hot pixels, this mode is used in high background situations . S13 camera CONICA is equipped with several cameras such as S13, S27, S54, the characteristics of camera S13 are; scale 13.221 ± 0.017 mas/pixel, field of view (FoV)14 ´14 arcsec and spectral range 1.0-2.5  µm. Available filters for the S13 camera are broad- and narrowband filters in the 1-2.5  µm region, Information on the broadband filters can be found in table 1. Unit Telescope 4 parameters Example observation planning The observation planning contains the next subjects (5): target scientific goal visibility period of target required observing conditions seeing atmospheric transparency lunar illumination required observing time list of required instruments, modes and configurations Target The chosen observation target is the Becklin-Neugebauer (BN) object located in the Orion Nebula Cluster, coordinates; right ascension (RA) 05h 35 m 14s.117 and declination (D) -05 ° 2222.90, epoch 2000.0, Scientific goal The Becklin-Neugebauer object was discovered as a bright 2 ÃŽÂ ¼m infra-red source (10) by Becklin and Neugebauer in 1967 (11), about 45 in projection from the Trapezium stars of the Orion Nebula Cluster, at a distance of ~ 450 pc. The Becklin-Neugebauer object together with the Kleinmann-Low nebula (KL) is part of the Orion Molecular Cloud 1 (OMC-1) region, a high-mass star formation region in the Orion constellation. In 2004 Shuping, Morris and Bally (8) discovered, at 12.5 µm, an arc of emission associated with the BN object, the so-called BN SW arc. The nature of this SW arc is still unknown, it may be externally heated gas or dust by UV radiation or is possibly a compressed shell created by an outflow or jet from BN. The BN SW arc is an interesting feature that needs further investigations both imaging and spectroscopy at other wavelengths to determine its true nature. Required observing conditions Seeing/airmass Seeing is defined as the image full width half maximum (FWHM )in arcsec ,the seeing values are 0.8and 1.2 at Zenith. Airmass quantifies the effects of all atmospheric processes, these atmospheric effects will be minimum when radiation travels vertically through the atmosphere, in this case z = 1. During the observation period the airmass ranges between z = 1.0 and z = 1.5 see table A, appendix 1, average airmass z = ~1,2. Atmospheric transparency During the observation period there should be no visible clouds and the transparency variations should be less than 2%. Lunar illumination Lunar illumination (FLI) is defined as the fraction of the lunar disk that is illuminated at local (Chile) civil midnight, where 1.0 is fully illuminated. Dark time corresponds to moon illumination less than 0.4, so the best time to observe the target is when the moon is new, see subsection 7.4. Visibility period of target To calculate the visibility of the target I have used the local sidereal time equation: Equation where LST = local sidereal, HA = hour angle and RA = right ascension. RA of BN-object = 05h 35 m 14s.117 = 5.587 hr. , on 21 March RA = 12hr is on the meridian at local midnight. RA = 5.587 hr will be on the meridian at local midnight about (5.587-12.0)ÃÆ'-30/2 = ~ 96 days =~ 3 months earlier . Thus the target will be well placed in November 2011 and December 2011. New Moon is on 25 November 2011 and 24 December 2011, so the best dates to observe the BN- object will be 22-27 November and 22-26 December 2011, see table B, appendix 2. The chosen observation period is the night of 24/25 December 2011, between 22hr and 2hr local time. Required observing time Angular resolution The theoretical angular limit of resolution is given by: Equation where l = wavelength, D = aperature diameter The wavelength of the K-filter is l = 2.18  µm, so the resolution is The resolution however is limited by atmospheric turbulence to where r0 is the Fried parameter. The Fried parameter is directly linked to the strength of the turbulence and it depends on the wavelength as: Equation for average observing conditions, r0 is about 0.6 m at 2.2 ÃŽÂ ¼m. Seeing disk The angular diameter of the seeing disk is Equation so for l = 2.18  µm and r0 = 0.6 m Area of seeing disk: Exposure time Exposure time Equation where: t = integration time r = signal to noise ratio f = flux transmitted by atmosphere fsky = sky background flux a = area of seeing disc A = effective area of telescope UT4 Q = quantum efficiency l = flux of the BN object l = wavelength = 5.510-7 m h = Plancks constant = 6.6310-34 J c = velocity of light = 3.0108 ms-1 The adopted signal to noise ratio S/N = r = 5. The flux transmitted by the atmosphere f = 1.0, see figure 3.2 NACO User Manual (3) The liming sky background magnitude is 13.0 mag (3), the sky background flux Equation Area of seeing disk a = 0.442 arcsec Effective area of UT4 Quantum efficiency Q = 0.85 The magnitude of the BN object corrected for extinction mv = 5.2 mag (11), the extinction in the V passband Av = ~18 mag. (8) so the apparent magnitude of the BN object m = 23.2 mag. Flux /magnitude conversion Equation The flux of the BN object is The exposure time for the BN object is: t = 639 sec. The exposure time calculated with ETC is 122,320 seconds !? , see appendix 4 table D. List of required instruments, modes and configurations The required telescope to observe the BN object is UT4 with the NACOS instrumentation. The NAOS with natural guide star, the CONICA imager with camera S13 and broadband filter K (2.18 mm). The chosen detector readout mode is FowlerNsamp and not Double_RdRstRd because the intergration time is larger than 60 seconds. Guide star id. 0477400932, RA 05hr 35m 16s.41, Dec -05 ° 23 23.0 magnitude 5.00 see table C, appendix 3, Conclusion The Very Large Telescope array is at this moment the most advanced optical instrument and the most productive individual ground-based observatory in the world. The instrumentation programme is the most ambitious programme for a single observatory and because of to the outstanding angular resolution and the use of adaptive optics VLT opens a new era of discoveries. Bibliography/References ESO http://www.eso.org/sci/facilities/paranal Giacconi R. The VLT White Book ESO http://www.eso.org/public/products/books/vlt_whitebook/ Girard J. et al. Very Large Telescope NACO Users Manual Do. No.: VLT-MAN-ESO-14200-2761 Date 12-02-2010 http://www.eso.org/sci/facilities/paranal/instruments/naco/doc/VLT-MAN-ESO-14200-2761_v86.0.pdf Dierickx P., et al The VLT primary mirrors: mirror production and measured performance http://www.eso.org/sci/facilities/paranal/telescopes/ut/m1unit.html de Zeeuw T. Call for Proposals ESO Period 87 30 August 2010 http://www.eso.org/sci/observing/proposals/CfP87.pdf Moorwood A. Astronomical News Report on the Conference Science with the VLT in the ELT Era Held in Garching, Germany 8-12 October 2007 Minchin N.R. et al Near-infrared imaging polarimetry of bipolar Nebulae-I. The BN-KL region of OMC-1 Mon. Not. R. astr. Soc.(1991) 248,715-729 Shuping R. Y., Morris M. and Bally J. A new mid-infra red map of the BN/KL  Region using the Keck telscope  The Astronomical Journal, 128:363-374, 2004 July Sansom A. UVOIR Astronomy AA2053  University of Central Lancashire , 2010 Tan J. The Becklin-Neugebauer Object as runaway B star  ejected 4000 years ago from the q1C system. The Astrophysical Journal Letters  11-12-2001  http://arxiv.org/abs/astro-ph/0401552v2 Robberto M. et al The Orion Nebula in the mid-infrared  The Astronomical Journal, 129:000-000  2005 March Becklin E.E., Neugebauer G. Observations of an infrared star in the Orion  Nebula  California Institute of Technology  Pasadena, California  September 12,1966 http://adsabs.harvard.edu/abs/1967ApJ147..799B Testor G. et al VLT/NACO near-infrared imaging and  spectroscopy of N159-5 in the LMC HII complex N159  Astronomy Astrophysics  469, 459-469 (2007) Appendices Appendix 1 Hourly airmasses for 05 35 14.12 -05 22 22.90 Paranal Observatory (VLT) Sat, December 24, 2011 *** Hourly airmass for Target *** Epoch 2000.00: RA 5 35 14.1, dec -5 22 23 Epoch 2011.98: RA 5 35 49.5, dec -5 21 57 At midnight: UT date 2011 Dec 25, Moon 0.00 illum, 151 degr from obj Local UT LMST HA secz par.angl. SunAlt MoonAlt HelCorr 22 00 1 00 2 31 -3 05 1.502 -118.5 -4.27 22 30 1 30 3 01 -2 35 1.341 -121.5 -4.32 23 00 2 00 3 31 -2 04 1.229 -126.1 -4.38 23 30 2 30 4 01 -1 34 1.152 -132.8 -4.43 0 00 3 00 4 32 -1 04 1.101 -142.9 -4.50 0 30 3 30 5 02 -0 34 1.071 -157.8 -4.56 1 00 4 00 5 32 -0 04 1.059 -177.2 -4.62 1 30 4 30 6 02 0 26 1.066 162.7 -4.69 2 00 5 00 6 32 0 56 1.090 146.5 -4.75 Table A: Hourly airmasss during observation period. SkyCalc provided by courtesy of John Thorstensen, Dartmouth College. [emailprotected] http://www.eso.org/sci/observing/tools/calendar/observability.html Appendix 2 Observability for 05 35 14.117 -05 22 22.90 Paranal Observatory (VLT) RA dec: 5 35 14.1, -5 22 23, epoch 2000.0 Site longlat: +4 41 36.8 (h.m.s) West, -24 37 30 North. Shown: local eve. date, moon phase, hr ang and sec.z at (1) eve. twilight, (2) natural center of night, and (3) morning twilight; then comes number of nighttime hours during which object is at sec.z less than 3, 2, and 1.5. Night (and twilight) is defined by sun altitude Date (eve) moon eve cent morn night [emailprotected]: HA sec.z HA sec.z HA sec.z 2011 Oct 11 F -8 54 down -4 28 2.5 -0 02 1.1 4.7 3.9 3.0 2011 Oct 26 N -7 45 down -3 31 1.7 +0 42 1.1 5.4 4.6 3.8 2011 Nov 10 F -6 33 down -2 32 1.3 +1 29 1.1 6.2 5.4 4.5 2011 Nov 24 N -5 25 5.7 -1 34 1.2 +2 17 1.3 7.0 6.2 5.3 2011 Dec 9 F -4 13 2.2 -0 29 1.1 +3 15 1.6 7.4 7.2 6.1 2011 Dec 24 N -3 05 1.5 +0 37 1.1 +4 19 2.4 7.4 7.0 6.1 2012 Jan 8 F -2 02 1.2 +1 44 1.2 +5 30 6.3 6.8 6.0 5.1 Table B: Observability of Becklin-Neugebauer object SkyCalc provided by courtesy of John Thorstensen, Dartmouth College. [emailprotected] http://www.eso.org/sci/observing/tools/calendar/observability.html Appendix 3 ESO GSC Online Server Query Result Center: RA: 05:35:14.117 DEC: -05:22:22.90 Search radius: 20 arcminutes nr gsc_id ra (2000) dec mag mu d pa 1 0477400932 05 35 16.41 -05 23 23.0 5.00 F; 1.15 150 2 0477400931 05 35 16.47 -05 23 22.8 5.09 F; 1.16 150 3 0477400933 05 35 22.83 -05 24 57.8 5.09 F; 3.37 140 4 0477400871 05 35 17.10 -05 23 40.6 5.51 F; 1.49 150 5 0477400934 05 35 26.27 -05 24 58.2 6.40 F; 3.98 131 6 0477400930 05 35 17.16 -05 23 12.7 6.69 F; 1.12 138 7 0477801369 05 35 54.09 -05 37 43.2 7.09 T; 18.28 147 8 0477400906 05 35 31.37 -05 16 02.7 7.19 T; 7.65 34 9 0477400906 05 35 31.26 -05 16 02.0 7.58 T; 7.65 34 10 0477801369 05 35 53.99 -05 37 42.1 7.74 T; 18.25 147 11 0477400935 05 35 31.33 -05 25 14.1 8.18 F; 5.15 124 12 0477400915 05 35 06.10 -05 12 15.5 8.28 F; 10.32 349 13 0477400809 05 34 46.89 -05 34 14.3 8.30 F; 13.66 210 14 0477400849 05 35 09.73 -05 27 52.6 8.53 F; 5.60 191 15 0477400823 05 34 55.20 -05 30 21.7 9.04 F; 9.27 211 16 0477400867 05 35 58.44 -05 22 31.0 9.11 F; 11.03 91 17 0477400855 05 36 27.09 -05 24 31.0 9.28 F; 18.29 97 18 0477400792 05 34 42.19 -05 07 14.2 9.39 T; 17.10 332 19 0477400894 05 35 34.18 -05 06 20.9 9.45 F; 16.79 17 20 0477400830 05 35 18.12 -05 03 54.5 9.48 F; 18.50 3 21 0477400792 05 34 42.19 -05 07 14.3 9.55 T; 17.10 332 22 0477400890 05 35 31.28 -05 33 08.5 9.74 F; 11.58 158 23 0477400829 05 35 35.71 -05 12 20.5 9.78 F; 11.39 28 24 0477400877 05 35 21.17 -05 09 15.7 9.79 F; 13.24 8 25 0477400812 05 35 00.05 -05 25 15.7 9.85 F; 4.53 231 26 0477400878 05 34 52.14 -05 33 08.1 9.96 F; 12.06 207 27 0477400810 05 34 49.89 -05 18 44.4 9.96 F; 7.04 301 gsc 1.0 25/Sep/1995. ESO/ST-ECF Archive| ESO| ST-ECF| Help| Search Send comments to HYPERLINK http://archive.eso.org/comments/[emailprotected]/Page:/cgi-bin/gsc. Table C: Guide stars Becklin-Neugebauer object

The Movie Industry vs Technology Essay -- Movies Internet Papers

The Movie Industry vs Technology The Internet and the roles it plays in society Since its conception, the Internet has been a huge market for life uses. It provides some of the greatest resources to educate people around the world such as search engines, databases, and an almost endless expanse for innovation. Being a conglomeration of countless numbers of computers allow users to interconnect with each other, making computers a prominent part of people’s lives. Aside from the home uses, businesses have capitalized on it as well. The Internet is essentially a medium through which mass distribution of information and goods can be disseminated. However, â€Å"the Net is no longer just a publishing or an entertainment or a personal communications medium, but rather a fundamental and indispensable engine driving all social and economic life† ( Kline). E-commerce is a big part of the average consumer. Shopping online at sites such as Amazon.com and Ebay.com have provided users with the convenience of shopping without picking up the car keys. With a few simple clicks, a few typing of numbers, the desired product could be at your door within a few days. Other uses are GPS systems, or even a 911-based emergency utility that combines GPS and locates you in time of trouble. This is all provided for by the internet. In light of all these fantastic services that are provided by the Internet, it is without its flaws. Child pornography and piracy are just some of the illegal activity that are present in society today. Filters have been set up in schools and in homes to prevent viewing or downloading of such illicit materials, however that is not enough. With the conception of Napster, the music industry engulfed it, chewed it up... ...anuary 12 - January 18, 2000. Http://www.citypaper.com/2000-01-12/pf/cyber_pf.html 8. Johnson, Bobbie. â€Å"CyberVillains†. The Guardian. Monday May 20, 2002. Http://film.guardian.co.uk/Print/0,3858,4416832,00.html 9. Kline, David. â€Å"The Embedded Internet†. Wired Magazine. October 1996 Issue 4.10. Http://www.wired.com/wired/archive/4.10/es_embedded_pr.html 10. Nugent, Benjamin and Bennet, Brian. â€Å"Beyond Hollywood’s Reach†. Time. Feb 25, 2002. V159 i8 p56. 11. Olsen, Stefanie. â€Å"Hollywood faces recurring Net nightmare†. CNET New.Com. June 5, 2002. Http://news.com.com/2100-1023-932743.html 12. Sullivan, Bob. â€Å"Hollywood Gets Tough on Copying†. MSNBC News.com. July 12, 2003. http://www.msnbc.com/news/779198.asp?cp1=1#body. 13. Weisman, Robyn. â€Å"Steal This Internet Movie†. NewsFactor Network. Febryary 28, 2002. Http://www.newsfactor.com/perl/story/16541.html