Retort stand and clamp Essay Example

Retort stand and clamp Essay Example Retort stand and clamp Paper Retort stand and clamp Paper In reference to the safety aspect, the radiation source is kept inside a lead block, inside a wooden box, inside another wooden block, tongues are present for the movement of the source so it never directly handled. The sources themselves are in holders, which channel the radioactive output in one direction alone. However as I am working with Gamma radiation this is slightly irrelevant. Also the rad-count dector will be placed in a clamp, to ensure its constant position. The radiation source itself is placed in a L-frame; this will keep it at a constant height. It also reduces the amount of handling needed of the sample. I also made sure that I was over 16 years of age before beginning, and made a concerted effort not to ingest the radiation source. Method 1. ) Take the background count of radiation by turning on the digital radcount, and setting to detection for 1 minute three times. 2. ) Remove the cobalt-60 from its lead container, and using tweezers put in the l-frame source rig. 3. ) Securely attach a metre rule to the desk, brace the l-frame against it, with the vertical section corresponding to a whole number on the metre rule 4. ) Secure the digital rad-count dector in a clamp attached to a retort stand, align this with the cobalt-60 and place it to be touching. 5. ) Set the digital rad-count to detection, for one minute, do this three times 6. ) Move the l-frame what you estimate to be 2. 5 mm from the digital rad-count, and set the digital vernier callipers to 2. 5 mm, cheek the distance of the l-frame and refine as necessary. 7. ) Repeat steps five and six until a distance of 3cm is achieved. Repeat step 1 at distance 1. 5 cm and 3cm. Analysis of Results I feel that my results prove that gamma radiation does obey the inverse square law; to begin with we will look at the graph in which the radiation count is plotted against distance A curve is described thus suggesting that intensity is inversely proportional to the distance. However this graph goes no way to prove that it is inversely proportional to the square of the distance, for that we need to construct a graph with one over the square root of the radiation count plotted against distance. My graph clearly shows a straight line. Thus it is shown that Gamma radiation obeys the inverse square law. However the Equation I achieve is actually Y= -0. 77X + 3. 02, but rather than proving that gamma radiation doesnt obey the inverse square law, I feel it merely points out certain experimental errors, namely the inaccuracies in distance. Although they may only have been +- 0. 5 mm, when working on a scale of 2. 5 mm at times the percentage error is very high. So I feel that these graphs more than adequately prove the inverse square law holds for gamma radiation. My trial experiment in light also proves that the inverse square law holds for light. In a similar method to the gamma experiment if we plot a graph of light intensity against distance, we obtain a curve. The fact it is a curve is good, however it is more than that it is a curve, with an almost perfect half life, the value not changing significantly for each half-life. Being around 2. 5cm. The fact it has such a good half-life makes the need for further graphs redundant, it conclusively proves the inverse square law. The half-life shows that if the distance is doubled the intensity is decreased by a factor of four. The fact that light and gamma radiation obey the inverse square law is solid proof that all members of the electromagnetic spectrum will obey the inverse square law. Evaluation Systematic Errors There was a high uncertainty in my measurement of distance. The cobalt 60 is kept within a metal tube. During my experimental procedure, I measured from the front of this tube, however the source could have been up to 5mm into the tube. Over short distances this leads to very high percentage errors. A similar thing is present in the Geiger-muller counter and tube. Like previously the actual dector is set inside the plastic casing, and could have been up to 5mm inside the tube. This leads to very high percentage errors again, which I will calculate later. There is a possibility that the counter and radiation source were actually slightly out of line, so as the two moved apart, there would be a horizontal angular discrepancy, this would lead to a count lower than it should be. However, attaching a meter rule to the desktop and bracing both the source clamp and the retort stand against it, and ensuring the two align as closely as possible, this problem is solved, this should also solve the problem on the vertical angular discrepancy. More extreme measures include bracing the equipment against the secure ruler to eliminate horizontal angular discrepancies, and attaching mini spirit levels to the source and detector to ensure the vertical angular discrepancies are kept to a minimum. It could also be possible to attach a laser pen to one of the pieces of equipment and ensuring the position of the laser light on the opposing piece of equipment doesnt change. This will eliminate both horizontal and vertical angular discrepancies. However these tow suggestions are impractical, the only laser light I have access to is actually very powerful, and could easily blind if directed at the ye, so I feel the danger levels here are to high. I only have access to large sprit levels, which would not be practical to attach to the equipment. Plus as I am only working over small distances any angular discrepancy will not produce high percentage errors. Another possible error would be if the count exceeds the level at which the dector could perceive. This would lead to what is known as dead time. As there is radioactive activity not being detected hence a deceptively low count would be present. But for this to occur it would require radiation counts far in excess of what the weak Gamma source I used was capable of, so this can be ignored.

How LinkedIn Networks You like a Pro

How LinkedIn Networks You like a Pro Recently I needed to build momentum as a certified SEO copywriter. Enter LinkedIn, a highly undervalued networking resource for writers, and suddenly, I had a new strategy for landing writing gigs. The types of writing gigs one reaches for on LinkedIn can be typically found under â€Å"search job† tab where you also enter your location. There is a plethora of niche driven writing and editor jobs which companies and agencies pay big bucks to advertise. Such gigs include technical, romance, email marketing writer, B2B/B2C, freelance, copywriting, digital content, SEO writers, among many others. But consider also using LinkedIn to network with potential people who may need your services. For example, if you’re an SEO content writer, you might want to network with CEOs of SEO agencies. Or if you are a freelance writer, you might want to connect with editors or publishers. There are two ways to leverage LinkedIn as a professional. The first is optimizing your LinkedIn profile and the second is networking. Be Keyword Friendly   Just like on any social media site, your prospect has just a few seconds to size you up. There are two prime real estates on LinkedIn: Your title and your profile. 1) A professional title that spells out your focus or niche.   Keywords help you build professional credibility. They are also used 2) A strong profile describing how you help clients. Using a bit of sales copy helped me restructure my profile so it’s not about me but what I can do for the client. (https://www.linkedin.com/in/doritsasson/)   Consider using the powerful second person, â€Å"you.† What does your prospect currently struggle with and need help with? If your prospect is a hiring manager representing clients, what are your client’s pain points? Increase Personal Outreach The more people you know on LinkedIn, the higher the chances your profile will be seen Adjust Your Profile Settings Once you increase your networking pool, start making those direct contacts. Leverage your network When a prospect views my profile, I immediately follow up with this short but sweet note: Hey, Prospect X, I noticed you were looking at my profile. I was just wondering if you needed marketing, writing, or any SEO support. If so, I’d be happy to hop on a call and talk with you. Thanks! There you go†¦nothing too scary! Post Regularly Finally, be sure to post regularly. No-one wants to hop on your LinkedIn profile only to find that the last time you’ve posted was six months ago. Inactivity shows a lack of professional commitment. Happy networking!

Botswana †From Ancient Times to Current Democracy

Botswana – From Ancient Times to Current Democracy The Republic of Botswana in southern Africa was once a British protectorate but now is an independent country with a stable democracy. It is also an economic success story, rising from its status as one of the poorest countries of the world to the middle-income level, with sound financial institutions and plans to reinvest its natural resource income. Botswana  is a landlocked country dominated by the Kalahari Desert and flatlands, rich in diamonds and other minerals. Early History and People Botswana has been inhabited by humans since the dawn of modern humans about 100,000 years ago. The San and Khoi peoples were the original inhabitants of this area and South Africa. They lived as hunter-gatherers and spoke Khoisan languages, noted for their click consonants. Migrations of People into Botswana The Great Zimbabwe empire extended into eastern Botswana a thousand years ago, and more groups migrated into the Transvaal. The areas major ethnic group is the Batswana who were herders and farmers living in tribal groups. There were larger migrations into Botswana of these people from South Africa during the Zulu wars of the early 1800s. The group traded ivory and skins with the Europeans in exchange for guns and were Christianized by missionaries. British Establish the Bechuanaland Protectorate Dutch Boer settlers entered Botswana from the Transvaal, sparking hostilities with the Batswana. The leaders of the Batswana sought assistance from the British. As a result, the Bechuanaland Protectorate was established on March 31, 1885, including modern Botswana and parts of present-day South Africa. Pressure to Join the Union of South Africa The inhabitants of the protectorate did not want to be included in the proposed Union of South Africa when it was formed in 1910. They were successful in staving it off, but South Africa continued to pressure the UK to incorporate Bechuanaland, Basutoland, and Swaziland into South Africa. Separate advisory councils of Africans and Europeans were established in the protectorate and the tribal rule and powers were further developed and regularized. Meanwhile, South Africa elected a nationalist government and established apartheid. A European-African advisory council was formed in 1951, and a consultative legislative council was established by a  constitution in 1961. In that year, South Africa withdrew from the British Commonwealth. Botswana Independence and Democratic Stability Independence was secured peacefully by Botswana in June  1964. They established a constitution in 1965 and held general elections to finalize independence in 1966. The first president was Seretse Khama, who was the grandson of King Khama III of the Bamangwato people and a prominent figure in the movement for independence. He was trained in law in Britain and married to a white British woman. He served three terms and died in office in 1980. His vice president, Ketumile Masire, likewise was reelected several times, followed by Festus Mogae and then Khamas son, Ian Khama. Botswana continues to have a stable democracy. Challenges for the Future Botswana is home to the worlds largest diamond mine and its leaders are wary of over-dependence on a single industry. Their economic growth has raised them into the middle-income bracket, although there is still high unemployment and socioeconomic stratification. A significant challenge is the HIV/AIDS epidemic, with a prevalence estimated at over 20 percent in adults, the third highest in the world.​Source: US Department of State Background Notes

Global warming essay Example | Topics and Well Written Essays - 500 words

Global warming - Essay Example Since 1980, there has been a massive change in global average temperatures and this has certainly risen significantly within the last century. The core reason behind such indefinite rise in temperature has been caused due to the constant increase in greenhouse gas emissions which has been produced due to various human activities. As a matter of fact, most scientists have agreed on the fact that the atmosphere of the planet’s temperature has risen approximately by 0.7 degree Celsius since 1980 and it there is a threat that it may even continue to increase at this astounding rate in the near future. According to many scientists and researchers, 1990 has been recorded as the hottest ever year in the 20th century. Apart from that, the years 1991, 1983, 1985, 1986 and 1989 have been recorded as some of the warmest years in the 20th century. As a consequence, the constant rise in temperature has also been felt all across the globe. Reportedly, temperature of the earth may rise from a reported 1.6Â °C to 5.9Â °C within the next century (Hughes, pp. 56-61). A huge increase in the quantity of greenhouse gases definitely leads to an increase of global warming in the atmosphere. The increase in greenhouse gases leads to an increase in CO2 emission, which is proposed to be the single largest contributor for global warming because it has the largest share among green house gases within the atmosphere (Schneider, pp. 23-29). However, there are ways through which this issue can be mitigated. A good way to solve this problem is forestation. Plantation of trees can help in restoring the balance which was disturbed by greenhouse gases. The utilization of vehicles which are fuel-efficient and which have lower C02 emissions of dangerous gases can be used to control this global issue. There have been growing concerns regarding CO2 emissions and a massive increase in global temperatures have

How Advertising is influenced by Ethics Research Paper

How Advertising is influenced by Ethics - Research Paper Example the literature review below, a comprehensive discussion on the different aspect of ethics and its influence on advertising for healthcare segment has been stated, which will assist the readers in getting a glimpse of the control that ethical advertising has on healthcare segment. 2. Literature Review 2.1 Influence of Ethics in Advertising Advertisements influence the thought process of the people and modify their outlook and behavior for the environment around them and the world. Therefore, moral principles, which are better known to be ethics, should be taught and understood by the advertisers, so that they can positively deliver the message that they intend to transmit. Ethics in advertising involves certain moral principles that have crucial role. The moral principle mainly emphasize on truthfulness, social dignity and responsibility of human beings. Truthfulness or honesty is the first characteristics that every advertisement must possess. Misrepresentation of information or exag geration should be strictly avoided. On the other hand, human dignity should not be harmed through advertisement, through criticism that violates rights or involves discriminations on any grounds. Ethics is just the starting point in advertising. The ethical decisions that are taken by the advertisers are generally complex and it includes steering through a moral maze of contradictory forces. When advertisements are developed by marketers, contradictions are apparent between cost and ethics, strategy and ethics or effectiveness and ethics. It is the obligation of the advertiser or the advertising professional to have an absolute knowledge of the industry standards, so that tactics can be executed without barring the industry norms. In these situations, aspects like personal judgment and... According to a customer, advertising is a way by which marketers can demonstrate about their product and lure them to buy it. However, advertising is not mere a lure game. It goes beyond just showing what is there to be sold. It is a serious business, which might cost lives of customers if not ethically done. In this research paper, the focus was on exploring the influence of ethics in advertising in healthcare marketing. Healthcare marketing involves promoting medicines, healthcare service by hospital and physicians, etc. Ethics is the most significant characteristics in advertising, but in healthcare segment, it is further important because it involves well-being of humans and animals too. Every country has their set of regulations and code of ethics for advertising, marketing or promotion. However, innumerable cases of misrepresentation, unethical practice, exaggeration, false claims, etc reveal that there are loop hole in codes of ethics which are being taken advantage of. There are no restrictions on freedom of speech or expression in any country, but it would be recommended that stricter laws for advertisement selection or broadcasting on television or online platforms.

Art periods - Impressionism and Post Impressionism Essay

Art periods - Impressionism and Post Impressionism - Essay Example The impressionist deviated from their predecessor artists as they painted in the open air (en plain air) (Rewald, 2005). This was very important in confronting the modern city life and the nature. They further painted their work by use of pure color. The use of pure color was very important as they made the work of the artist impressive. The work was attractive unlike the previous artistic work. The artists who fall in this category influenced the western conception of drawings and paintings. The impressionists revolutionized the western work of art. It was an avenue of the post impressionists who created their work basing on the impressionism. They modified the impressionism work of art. They thus, maintained some other aspects of the impressionism. The impressionism is very important as it made a base for the post impressionism. All the paintings, drawings and films of post- impressionism were borrowed from the impressionism. Even though the post impressionists deviated from the im pressionists, they still borrowed some knowledge from impressionists to perfect their works of art. Claude Monet is the greatest artist in this period. He aimed at catching light and atmosphere something which had not been thought by the past artists. His enjoyment in painting outdoors let to spontaneous and free painting technique. Monet’s brushwork is remarkably varied and flexible. He could change his work. Sometimes his work was dappled and sparking but at other times it was broad and sweeping.

Demings point Essay Example | Topics and Well Written Essays - 250 words

Demings point - Essay Example Result orientation focuses on the output of the process. Result orientation focuses on the quality and quantity of the output. In the workplace, it includes having a setup list that is used to determine if the goals of the process have been achieved. For example, in factory, the management is supposed to make sure all the departments are taken care of. The departments, which include manufacturing, sales, processing, human resource and the finance department, should be well coordinated so that whole process smooth. A neglect of any one department can lead to the collapse of the whole system or the whole system being inefficient. A firm should have a good relationship with its customers, community and the employees themselves. A good relationship with the community is reached when the firm has a social responsibility programme that benefits the community. The programmes may include funding community projects,organizing trade fairs that educate them and giving the locals a priority during hiring of employees. A good working relationship enhances the firms image; hence boosting its