History: A chemist's contradictions
نویسندگان
چکیده
منابع مشابه
Do historians or chemists write better history of chemistry? (1).
This paper was the response to a challenge set me as the senior historian of chemistry (in age) serving on the ACS National Historic Chemical Landmarks Committee. The challenge was to reflect on the history of chemistry in terms of the question posed in the paper’s title. Although there is a “tongue in cheek” quality to the question, it also has its serious side and it challenged me. I have to ...
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The use of chemicals gradually increased from prehistoric time to the fourth century A.D. when alchemy was introduced. Alchemy was a branch of chemistry that attempted to transform base metals (eg, lead, copper, and zinc) to precious metals (eg, silver and gold) [1]. Alchemists pursued this futile goal with secretive stubbornness for over a thousand years, to the detriment of chemistry as a who...
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We describe our use of contradictions, a concept central to a popular formulation of activity theory, to derive requirements on a new technical system to support an administrative system. Contradictions are the underlying causes of disturbances in the free operation of workplace activities. We argue and demonstrate that the resolution such contradictions can be used as the basis for the (user c...
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We study the relation between logical contradictions such as p ∧ ¬p and structural contradictions such as p∩ (p · q). Intuitively, we expect the two to be treated similarly, but they are not by PSL, nor by SVA. We provide a solution that treats both kinds of contradictions in a consistent manner. The solution reveals that not all structural contradictions are created equal: we must distinguish ...
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ژورنال
عنوان ژورنال: Nature
سال: 2016
ISSN: 0028-0836,1476-4687
DOI: 10.1038/533175a