See our resources page for information, support and best practices. Due to the current restrictions in place, our inspection copy policy has changed. Vibrant and insightful, this book introduces students and researchers to the basics of case study research. Adopting jargon-free language, it grounds its advice in concrete experience and real-world cases.


Historically, computers were human clerks who calculated in accordance with effective methods. These human computers did the sorts of calculation nowadays carried out by electronic computers, and many thousands of them were employed in commerce, government, and research establishments. The term computing machineused increasingly from the s, refers to any machine that does the work of a human computer, i.


We will continue to pursue these cases to protect people and our platform from those who engage in abuse and disregard our cease and desist letters. Today we filed separate lawsuits in Europe and the United States to enforce our Terms of Service against the use of unauthorized automation software on Facebook and Instagram. This is one of the first times a social media company is using coordinated, multi-jurisdictional litigation to enforce its Terms and protect its users.


Attacks on a country's transportation infrastructure can have serious and destabilizing impacts that are further complicated by the public availability of information relevant to these targets. Recognizing the potential damage of such attacks, RAND conducts research and provides essential planning and vulnerability assessment tools to public and private organizations from metropolitan transit authorities to airlines and rail companies.


Probably the most important eclipse in the history of science occurred on 29 May Just six months after the end of World War I, British astronomers used it to test a new idea that came from Germany in The proposition was that gravity affected light, space and time itself, and as a result the Sun would deflect starlight passing by it. Changes in the apparent direction of stars in the sky, seen close to the Sun during a total eclipse, could confirm the idea. The announcement of favourable results in London on 8 November signalled the replacement of Newton's theory of gravity by the theory of general relativity. Its originator, a year old Berliner called Albert Einstein, at once became the most famous scientist in the world.


Before continuing to use our service please make sure you got acquainted with our Cookie Policy and accepted it by clicking OK. Students who find themselves inundated with writing assignments for at least five courses each semester are stressed and anxious. Many have part-time jobs to help with college expenses; others are involved in a number of campus activities; still others are taking some seriously challenging courses for which there are multiple essays and papers due throughout the semester. At some point, they are ready to throw up their hands and decide to just take failing grades on some of these assignments.


Early signs of multisystem inflammatory syndrome include fever, rashes, abdominal pain, diarrhea and vomiting. Although the condition is rare, it can worsen quickly and sometimes be fatal. When doctors first encountered these symptoms in young patients, they suspected Kawasaki disease, which causes inflammation in the blood vessels of children. Arditi, an expert on Kawasaki diseasetold National Geographic there are clear differences between the two illnesses.