منابع مشابه
Sounding Out Social Media
crowdsourcing should be aware of the approach’s significant limitations and biases, and of the need to sort through and verify large amounts of information of uneven reliability. Furthermore, crowdsourcing tends to work better when the goal is to quickly compile and share knowledge that is already available, rather than as a means to engage in original research. Crowdsourcing cannot replace mor...
متن کاملTwo Centuries of Medicine
The material covered in this volume is the text of a series of papers presented at a colloquium on rapid mixing and sampling techniques held in 1964. This reviewer cannot comment on the value of this book for the expert but it is quite certain that it is of limited value to the biochemist not highly trained in the field of instrumentation. Little effort has been made by the editors to make this...
متن کامل[Two centuries of urologic endoscopy].
Vekovima čovekova prirodna radoznalost za ljudsko telo dovodila je do stvaranja raznih instrumenata od kojih su mnogi slični današnjoj dijagnostičkoj opremi. Prvi veliki napredak u endoskopiji učinjen je u 19. veku. Filip Bocini (Phillip Bozzini, 1773–1809) opisao je 1806. godine instrument koji vizuelizuje unutrašnjost mokraćne bešike i nazvao ga lichtleiter . Okrugli otvor lichtleitera bio je...
متن کاملSounding out migraine-related interactions between the brainstem and cortex.
The clinical features of a migraine attack include symptoms generated by both the brainstem and the cortex. Significant changes in the activity of both brain regions during migraine have been clearly demonstrated with functional imaging techniques (1,2). How these brain regions interact before, during, and after a migraine attack remains much less clear. Cortical spreading depression (CSD), the...
متن کاملTwo centuries of eye care in Hawaii.
Eye care in Hawai'i has changed dramatically since 1778. The ancient Hawaiians lacked any optical aids and had only the most primitive methods of treatment for their visual problems. During the next 200 years, Island residents benefited from a succession of technical innovations and new professional skills, all introduced from abroad: spectacles, optometry, ophthalmology, contact lenses, cornea...
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ژورنال
عنوان ژورنال: Nature
سال: 1999
ISSN: 0028-0836,1476-4687
DOI: 10.1038/18369