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JanSport is an American brand of backpacks and collegiate apparel, now owned by VF Corporation, one of the world's largest apparel companies. [1] JanSport is the world's largest backpack maker. Nearly half of all small backpacks sold in the United States are produced by JanSport and its sister brand The North Face , also owned by VF Corporation.
Joachim Boldt (Germany), an anesthesiologist formerly based at the Justus Liebig University Giessen, was stripped of his professorship and criminally investigated for forgery in his research studies. [17] As of 2024, Boldt has had 220 of his research publications retracted, and 10 others have received an expression of concern. [18] [19]
Examples include American abuses during Project MKUltra and the Tuskegee syphilis experiments, and the mistreatment of indigenous populations in Canada and Australia. The Declaration of Helsinki , developed by the World Medical Association (WMA), is widely regarded as the cornerstone document on human research ethics .
Case studies are generally a single-case design, but can also be a multiple-case design, where replication instead of sampling is the criterion for inclusion. [2] Like other research methodologies within psychology, the case study must produce valid and reliable results in order to be useful for the development of future research.
A case study is an in-depth, detailed examination of a particular case (or cases) within a real-world context. [1] [2] For example, case studies in medicine may focus on an individual patient or ailment; case studies in business might cover a particular firm's strategy or a broader market; similarly, case studies in politics can range from a narrow happening over time like the operations of a ...
For example, after demonstrating that light is generated by luminous objects and emitted or reflected into the eyes, he states that therefore "the extramission of [visual] rays is superfluous and useless." [8] He may also have been the first scientist to adopt a form of positivism in his approach. He wrote that "we do not go beyond experience ...
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For important research in vibrating plates Atomic bomb: Enrico Fermi J. Robert Oppenheimer Leslie Groves Edward Teller: For their role in the Manhattan Project: Aerodynamics: Nikolai Zhukovsky George Cayley [133] Zhukovsky was the first to undertake the study of airflow, was the first engineer scientist to explain mathematically the origin of ...