what did ebbinghaus used to conduct his research
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Classics in the History of Psychology In order to proceed with his research, Ebbinghaus had first to invent stimulus materials. These needed to be relatively simple, neutral as to meaning, and homogeneous. They needed to be available in large numbers and to allow quantitative manipulation of the amount of material to be retained.
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This Month in Physics History Clearly, a new model of the atom was needed. Geiger still thought there had to be a better way to measure the scintillations, and in 1911 he invented a device to count radioactive alpha particles automatically in normal light. It used a Crooke’s tube as one electrode, with a thin wire running through the middle of the tube as a second electrode.
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- Franklin was going to share her findings in a talk at the University of London, Watson made plans to go. At the. presentation, Franklin showed X-ray diffraction patterns produced by DNA A and B, and discussed how the. two forms seemed to be produced by surrounding the DNA molecules with different amounts of water.
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- The AUSAB EIA for anti-HBs uses the “sandwich principle” a solid phase enzyme-linked immunoassay technique (1, 2) to detect anti-HBs levels in serum or plasma. Polystyrene beads coated with human Hepatitis B Surface Antigen (HBsAg) are incubated with either the patient specimen or the appropriate controls.
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- Such an object that absorbs light of all colors looks black, and so was called a blackbody. The wavelength or frequency distribution of blackbody radiation was studied in the 1890s by Wilhelm Wien of Germany. It was his idea to use as a good approximation for the ideal blackbody an oven with a small hole.
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- The Electron Discovery Experiment. Towards the end of the 19th century Joseph J.Thomson (1856-1940) was studying electric discharges at the well-known Cavendish laboratory in Cambridge, England.
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Carl Friedrich Gauss In 1818 Gauss, putting his calculation skills to practical use, carried out a geodesic survey of the Kingdom of Hanover, linking up with previous Danish surveys. To aid the survey, Gauss invented the heliotrope, an instrument that uses a mirror to reflect sunlight over great distances, to measure positions.
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Why did James Chadwick use berryllium to discover neutrons? In Rutherford's alpha particle scattering experiment he used gold foil because it's malleable and can be drawn into very thin sheet. Why did James Chadwick use Berryllium while discovering neutrons...
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Haber process Haber together with his assistant Robert Le Rossignol developed the high-pressure devices and catalysts used to demonstrate the Haber process at laboratory scale. They demonstrated their process in the summer of 1909 by producing ammonia from air drop by drop, at the rate of about 125 ml (4 US fl oz) per hour.uring World War I, the synthetic ammonia was used for the production of nitric acid, a precursor to munitions. The Allies had access to large amounts of sodium nitrate deposits in Chile (so called Chile saltpetre) that belonged almost totally to British industries.
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- Arthur Scherbius, a German engineer, developed his 'Enigma' machine, capable of transcribing coded information, in the hope of interesting commercial companies in secure communications. In 1923 he set up his Chiffriermaschinen Aktiengesellschaft (Cipher Machines Corporation) in Berlin to manufacture his product.hoto: A four-rotor German Enigma cipher machine made during WW2. This rare machine is thought to have been used in the post-war years for coding Swiss diplomatic traffic. (SSPL/Getty Images).
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- standard curve generated from measurement of the standards run in duplicate with the AUSAB EIA kit. A curve is obtained by plotting the anti-HBs concentration of the standard vs. the absorbance. The anti-HBs concentration of specimens run concurrently with the standards can then be read from the curve.
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New EEG Technology Makes for Better Brain Reading To this point, direct examination of brain activity as a window into the client’s mind has remained elusive. But advances in the field of brain examination using electroencephalographs (EEGs) may be changing all that. The first EEG was developed in the 1920’s by the German psychiatrist Hans Berger. He developed it to test the biological electricity produced in the brain, and first used it during brain surgery performed in 1924 on a 17-year-old boy.
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Horace Mann Calvin E. Stowe, Henry Barnard, Horace Mann, George Bancroft and Joseph Cogswell all had a vigorous interest in German education. In 1843, Mann traveled to Germany to investigate how the educational process worked. Upon his return to the United States, he lobbied heavily to have the Prussian model adopted.
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Sociology Chapter 1 An African American View: W.E.B. Some early black sociologists conducted research that they hoped would assist the struggle for a raceally egalitarian society. This sociologist made a major contribuition to sociology trhough this in-depth studies of urban life, both white and black.
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ReviewInventing industrial research: Thomas Edison and the Menlo Park Laboratory At his laboratory at Menlo Park, New Jersey, Edison merged the machine shop with sophisticated electrical and chemical laboratories and employed teams of researchers who could experiment on all aspects of his inventions and move them rapidly from research to development and commercialization.
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The learning curve The first scientific study of the learning curve was performed by Hermann Ebbinghaus. Ebbinghaus learned nonsensical three letter words such as “WID” “KOR” “ZIF” etc. and recorded his progress.his is the phase, where you make the most progress. Once you reach a certain level of skill and knowledge you enter the phase of diminishing returns. The better you become at the task the less you still can make progress in the learning curve.
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- Directions. In a food processor or blender, combine the nuts, 2 tablespoons of the oil, the salt, and the sugar, if desired. Process on high speed for 30 seconds. Scrape down the sides with a rubber spatula and process to desired smoothness, adding more oil, 1 teaspoon at a time, if a smoother butter is desired.irections. In a food processor or blender, combine the nuts, 2 tablespoons of the oil, the salt, and the sugar, if desired. Process on high speed for 30 seconds. Scrape down the sides with a rubber spatula and process to desired smoothness, adding more oil, 1 teaspoon at a time, if a smoother butter is desired.
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- Maxwell and Hertz. About 150 years ago, James Clerk Maxwell, an English scientist, developed a scientific theory to explain electromagnetic waves. He noticed that electrical fields and magnetic fields can couple together to form electromagnetic waves. Neither an electrical field (like the static which forms when you rub your feet on a carpet), nor a magnetic field (like the one that holds a magnet onto your refrigerator) will go anywhere by themselves.
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Bessemer Steel Process Bessemer's experiments indicated that injecting oxygen into the steel-making process would heat the steel to such a level that impurities would burn off. He devised furnace that would inject oxygen into the steel.
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- Tesla employed the Tesla coil in his efforts to achieve wireless power transmission, his lifelong dream. In the period 1891 to 1900 he used it to perform some of the first experiments in wireless power, transmitting radio frequency power across short distances by inductive coupling between coils of wire.
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- Edward Titchener (cont.) c) While physicists use. inspection. as a method of research, the method of psychology is systematic introspection. d) Despite Titchener’s narrow range of laboratory work, he viewed the scope of psychology in broader terms.
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Maryland Before Europeans arrived in Maryland the land was inhabited by Native Americans. Most of the Native Americans spoke the Algonquian language. They lived in domed wigwam homes made from tree branches, bark, and mud. The men hunted deer and turkey, while the women farmed corn and beans.
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Chap12EDL - Kenneth Eward/Science Source 12 A digital model... Chap12EDL - Kenneth Eward/Science Source 12 A digital model... This preview shows page 1. Sign up to view the full content. This is the end of the preview. Sign up to access the rest of the document. Unformatted text preview: Kenneth Eward/Science Source 12 A digital model of DNA (based on data generated by X-ray crystallography). DNA Structure, Replication, and Organization Why It Matters Imagine a scene 40 thousand years ago in what is now called the Drachenlock Cave in Switzerland.
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Concept 19 The DNA molecule is shaped like a twisted ladder. In 1951, Franklin was offered a 3-year research scholarship at King's College in London. With her knowledge, Franklin was to set up and improve the X-ray crystallography unit at King's College.
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The Krebs Connection Sir Hans Krebs came to the University of Sheffield as Lecturer in Pharmacology in 1935. He was a German Jewish refugee who had already discovered the ornithine (urea) cycle at Freiburg before being forced to flee the country in 1933.
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- Dr. Josef Mengele began his research in May of 1943 at Auschwitz, Poland. Mengele's experiments were funded through a grant by the German Research Council. He was fascinated by twins, dwarfs, cripples, and what he called  exotic specimens.hese experiments were very broad and specialized. They were conducted to refine the master race and to determine the causes of defects. Dr. Josef Mengele's research on the twins and other Auschwitz inmates was based on genetics.