منابع مشابه
Tubular Sculptures
This paper reviews ways in which many artists have constructed large sculptures from tubular elements, ranging from single cylinders to toroidal or knotted structures, to assemblies of a large number of bent tubes. A few parameterized generators are introduced that facilitate design and evaluation of a variety of such sculptural forms.
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Many abstract geometrical sculptures have the shape of a (thickened) 2D surface embedded in 3D space. A fundamental theorem about such surfaces states that their topology is captured with just three parameters: orientability, genus, and number of borders. When trying to apply this classification to interesting sculptures of famous artists depicted on the Web, a first non-trivial task is to esta...
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Uncompetitive N-methyl-d-aspartate (NMDA) receptor antagonists, such as dizocilpine (MK-801) and memantine, bind to the NMDA receptor channel, and block Ca influx. The increase in intracellular concentration of second messengers, such as Ca and cyclic adenosine monophosphate (cAMP), activate the transcription of certain genes. This process is controlled by cAMP response element binding protein ...
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D NA may carry all of the instructions, and proteins may do most of the work, but a cell would not be a cell without lipids. These molecules, which number in the thousands, include important natural products such as fatty acids, phospholipids, and sterols (1) and work at jobs as varied as forming the protective membranes that shelter cells from the outside world to acting as targets for recepto...
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ژورنال
عنوان ژورنال: Nouvelles de l'estampe
سال: 2011
ISSN: 0029-4888,2680-4999
DOI: 10.4000/estampe.1114