Fun Science Facts You Need to Know

Amaze yourself and your friends with these science facts! This is a collection of fun and interesting science facts. When you crack a whip, it makes a sharp sound because the tip of the whip is traveling faster than the speed of sound. It is a sort of mini sonic boom!You could theoretically lose weight eating celery since it takes more calories to digest celery than are contained in the vegetable.Shark teeth are as hard as steel.The only letter not used in the periodic table is J.Lobsters have blue blood.Sound travels about four times faster in water than in air.2 and 5 are the only prime numbers that end in 2 or 5.Women blink nearly twice as often as men.The billionth digit of pi is 9. (Source: Ben Peoples)On average, it takes a person 7 minutes to fall asleep.The peanut is a member of the bean or legume family and not a nut.The prefix numbus in a cloud name means the cloud produces precipitation.Anemometers measure wind speed.The only two planets in our solar system that do not have moons are Mercury and Venus.Bronze is an alloy of copper and tin.Oxygen is the most common element in the Earths cr ust.

Secondary Data and Secondary Analysis

Within sociology, many researchers collect new data for analytic purposes, but many others rely on secondary data in order to conduct a new study. When research uses secondary data, the kind of research they perform on it is called secondary analysis. Key Takeaways: Secondary Data Secondary analysis is a research method that involves analyzing data collected by someone else.A great deal of secondary  data resources and data sets are  available for sociological research, many of which are public and easily accessible.  There are both pros and cons to using secondary data.Researchers can mitigate the cons of using secondary data by learning about the methods used to collect and clean the data in the first place, and by careful usage of it and honest reporting on it. Secondary Analysis Secondary analysis is the practice of using secondary data in research. As a research method, it saves both time and money and avoids unnecessary duplication of research effort. Secondary analysis is usually contrasted with primary analysis, which is the analysis of primary data independently collected by a researcher. How Researchers Obtain Secondary Data Unlike primary data, which is collected by a researcher herself in order to fulfill a particular research objective, secondary data is data that was collected by other researchers who likely had different research objectives. Sometimes researchers or research organizations share their data with other researchers in order to ensure that its usefulness is maximized. In addition, many government bodies within the U.S. and around the world collect data that they make available for secondary analysis. In many cases, this data is available to the general public, but in some cases, it is only available to approved users. Secondary data can be both quantitative and qualitative in form.  Secondary quantitative data is often available from official government sources and trusted research organizations. In the U.S., the U.S. Census, the General Social Survey, and the American Community Survey are some of the most commonly used secondary data sets within the social sciences. In addition, many researchers make use of data collected and distributed by agencies including the Bureau of Justice Statistics, the Environmental Protection Agency, the Department of Education, and the U.S. Bureau of Labor Statistics, among many others at federal, state, and local levels. While this information was collected for a wide range of purposes including budget development, policy planning, and city planning, among others, it can also be used as a tool for sociological research. By reviewing and analyzing numerical data, sociologists can often uncover unnoticed patterns of human behavior and large-scale trends within society. Secondary qualitative data is usually found in the form of social artifacts, like newspapers, blogs, diaries, letters, and emails, among other things. Such data is a rich source of information about individuals in society and can provide a great deal of context and detail to sociological analysis. This form of secondary analysis is also called content analysis. Conduct Secondary Analysis Secondary data represents a vast resource to sociologists. It is easy to come by and often free to use. It can include information about very large populations that would be expensive and difficult to obtain otherwise. Additionally, secondary data is available from time periods other than the present day. It is literally impossible to conduct primary research about events, attitudes, styles, or norms that are no longer present in todays world. There are certain disadvantages to secondary data. In some cases, it may be outdated, biased, or improperly obtained. But a trained sociologist should be able to identify and work around or correct for such issues. Validating Secondary Data Before Using It To conduct meaningful secondary analysis, researchers must spend significant time reading and learning about the origins of the data sets. Through careful reading and vetting, researchers can determine: The purpose for which the material was collected or createdThe specific methods used to collect itThe population studied and the validity of the sample capturedThe credentials and credibility of the collector or creatorThe limits of the data set (what information was not requested, collected, or presented)The historic and/or political circumstances surrounding the creation or collection of the material In addition, before using secondary data, a researcher must consider how the data are coded or categorized and how this might influence the outcomes of secondary data analysis. She should also consider whether the data must be adapted or adjusted in some way prior to her conducting her own analysis. Qualitative data is usually created under known circumstances by named individuals for a particular purpose. This makes it relatively easy to analyze the data with an understanding of biases, gaps, social context,  and other issues. Quantitative data, however, may require more critical analysis. It is not always clear how data was collected, why certain types of data were collected while others were not, or whether any bias was involved in the creation of tools used to collect the data. Polls, questionnaires, and interviews can all be designed to result in pre-determined outcomes. When dealing with biased data, it is absolutely critical that the researcher is aware of the bias, its purpose, and its extent. However, biased data can still be extremely useful, as long as the researchers carefully consider the potential effects of the bias.

History of biomaterials Free Essays

Earlier surgical procedures, whether they Involved bimetallism or not, were generally unsuccessful as a result of infection Bimetallism, Joyce Y Wong and Joseph D Brannon (Deeds), CRY press, Boca Orator, FL, 2007 3 asses: Bone plates were Introduced to lad In the fixation of long-bone fractures. Many of these early plates broke as a result of unsophisticated mechanical design; they were too thin and had stress-concentrating corners. Also, materials such as indium steel, which was chosen for its good mechanical properties corroded rapidly in the body and caused adverse effects on the healing processes asses: Stainless steels and cobalt chromium alloys were introduced and great success was achieved In fracture fixation, and soon Joint replacement surgeries were Bimetallism, Joyce Y Wong and Joseph D Bronzing (Deeds), CRY Press, Boca Orator, FL, 4 MAMA asses: During the World War II, it was found that pilots injured by fragments of plastic MAMA (polymath matriculate) aircraft canopy did not suffer adverse chronic reactions from the presence of the fragments in the body. We will write a custom essay sample on History of biomaterials or any similar topic only for you Order Now MAMA became ideal used after that time for corneal replacement and for replacements of sections of damaged skull bones 1950-asses: Following further advances in materials and in surgical technique, blood vessel replacements were tried in asses and heart valve replacements and cemented Joint replacements in asses 5 Year Investigators Late 18-19th century Development Metal devices to fix bone fractures; wires and century pins from Fee, Au, Gag, and Opt 1860-1870 J. Leister Aseptic surgical techniques 1886 H. Huntsman 1893-1912 W. A. Lane Steel screws and plates (Lane fracture plate) 1912 W. D. Sherman Vanadium steel plates, first developed or medical use; lesser stress concentration and corrosion (Sherman 1924 A. A. Zeroed Introduced Satellites@ (Corm alloy) 1926 M. Z. Lange Introduced 18-cosmos stainless steel, better than 18-8 stainless steel 6 Used carpenter’s screw for femoral neck fracture 1931 M. N. Smithereens First femoral neck fracture fixation device made of stainless steel 1936 C. S. Venerable, W. G. Stuck Introduced Vitality@ (19-9 stainless steel), later changed the material to Coir alloys 1938 P. Wiles First total hip replacement prosthesis 1939 J. C. Burch Introduced tantalum (Ta) ASSES M. J. Doreen, A. Franchisee First used replacement 1946 J. And R. Jude First phonemically designed femoral head replacement prosthesis. First plastics (MAMA) used acrylics (MAMA) corneal 7 1947 J. Cotton Introduced It and its alloys 1952 A. A leaflet in heart valve must flex 60 timer per minutes without tearing for the life time of a patient (10 years or more) 0 Bulk physical properties: The dialysis membrane has a specified permeability, the reticular cup of the hip Joint has a lubricity, and the intraocular lens has clarity and refraction requirements 13 Absorbability 0 Absorbability is the ability of a material to perform with an appropriate host response in a specific application (Williams, 1987) 0 Thus, absorbability is the acceptance of a material by the surrounding tissues ND by the body as a whole. A objectionable material should not do exhibit following characteristics: (1) irritate the surrounding structures (2) provoke an abnormal inflammatory response (3) incite allergic or immunologic reactions (4) cause cancer 14 15 Performance of bimetallism the material properties, design, and absorbability of the material used, as well as other factors not under the control of the engineer, including the technique used by the surgeon, the health and condition of the patient, and the activities of the patient. If we can assign a numerical value f to the probability of allure of an implant, then the reliability can be expressed as r=l -f If, as is usually the case, there are multiple modes of failure, the total reliability art is given by the product of the individual reliabilities RL =(1 -FL),etc. Art=RL re 16 Inert and evocative bimetallism 0 Initially (asses-asses) the bimetallic designed were inert (not reactive with the body) to decrease the potential for negative immune response to the implant 0 Later (asses), the concept of inert bimetallic was replaced with that of evocative bimetallism. The evocative material interact with the body in a positive manner to remote localized healing Bimetallism – The Intersection of Biology and Materials Science,AS Tenement and GAG Mikes, Prentice Hall, 2009 17 Hard and Soft tissue replacement bimetallism 0 Bimetallism scientists must have an appreciation of material science. A wide range of materials are routinely used and no researcher will be comfortable in synthesizing and designing with all these materials and therefore specialization is the rule 0 There is tendency to group bimetallism into hard tissue replacement bimetallism (metals, ceramics for use in orthopedic and dental materials) and soft tissue placement bimetallism (polymers) for cardiovascular and general plastic surgery 0 Division is arbitrary though 18 Market perspectives (2008) 0 Mostly used devices are replacement heart valves, synthetic vascular grafts, hip and knee replacement, heart lung machine, renal dialysis equipment, and bone and dental implants 0 About 100,000 replacement heart valves; 300,000 vascular grafts; and 500,000 artificial Joint replacements are carried out in the United States every year 19 Do it yourself? 0 Assume that a bone implant (bone plate) leads to calcification. Will you consider it an appropriate or inappropriate host response? 20 How to cite History of biomaterials, Papers

Coping free essay sample

My generation’s greatest challenge will be coping with the real world. We are the most shielded, mollycoddled and over-protected group of kids to grow up in America. We’ve been separated from war by distance and the worst thing that could possibly happen is for our favorite reality television show to be cancelled after only four seasons. Oh, how we’ve suffered. In the age of the iPod, news has faded into something that occasionally appears on AOL’s welcome screen. When my generation does catch a glimpse of news an explosion in a foreign land, terrorists threatening America it seems distant and unlikely to affect us. We constantly see support for the troops fighting heaven-knows-where, so it’s a natural assumption that we don’t have to worry about our safety; we can pore over the latest celebrity hook-ups instead. Applying to colleges and having to prove ourselves has been a nasty enough shock for my generation. We will write a custom essay sample on Coping or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The last few years, I’ve noticed more and more of my high school’s alumni staying in town to go to the local college. Is the real world really that frightening? Most of these kids have never lived out of state and probably never will. It has become too easy and too comfortable to feed off our parents like preppy little parasites. Why go out into the world and make a name for yourself when a smaller, safer version of the world is handed to you by Mom and Dad? Talk about difficult decisions. The real challenge will come when we finally have to take on authoritative, demanding roles in society. How are we coping so far? According to The Washington Post, â€Å"one in 10 American women takes an antidepressant drug and the use of such drugs by all adults has nearly tripled in the last decade.† That would make my generation’s greatest challenge be coping with reality without drugs. We’re not doing so well, so far. If we don’t start to adapt soon, our country and world will be run by underqualified â€Å"Daddy’s little Princesses† who will take uninformed standpoints on important world issues. We have to start taking control of our lives now, before we get too comfortable living in the passenger seat.