منابع مشابه
Structure with a light touch
Structure with a light touch ike a blind man tapping around a neighborhood, colleagues have used atomic force microscopy (AFM) to picture the organization of a photosynthetic membrane. The arrangement explains how light energy is channeled from antenna-like collectors to an energy-transforming reaction center (RC) complex. When the structure of the RC was solved in 1985 it was the first X-ray s...
متن کاملOptical tweezers: a light touch.
Optical tweezers use focused laser light to manipulate microscopic particles. We discuss the underlying physics of the technique in terms of a gradient force exerted by the light on the particles. The versatility of optical tweezers is highlighted, in particular, we explain how spatial light modulators and various imaging methods have greatly enhanced their range of applications.
متن کاملRubber hands feel the touch of light.
Two experiments involving a total of 220 subjects are reported. The experiments document that "stroking" a false hand with the bright beam of light from a laser pointer can produce tactile and thermal sensations when the hand can be seen as one's own. Overall, 66% of subjects reported somatic sensations from the light. Felt hand location was recalibrated toward the location of the false hand fo...
متن کاملA Light Touch for Heavily Constrained SGD
Projected stochastic gradient descent (SGD) is often the default choice for large-scale optimization in machine learning, but requires a projection after each update. For heavily-constrained objectives, we propose an efficient extension of SGD that stays close to the feasible region while only applying constraints probabilistically at each iteration. Theoretical analysis shows a good trade-off ...
متن کاملThe Light Touch of Delta Opioid Receptors
Expression of δ-opioid receptors in sensory neurons is controversial. In this issue of Neuron, Bardoni et al. (2014) present evidence that DOPrs are expressed on mechanosensory neurons involved in detecting nonnoxious touch but are very sparse in μ-opioid receptor-rich nociceptive neurons.
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ژورنال
عنوان ژورنال: Nature Nanotechnology
سال: 2009
ISSN: 1748-3387,1748-3395
DOI: 10.1038/nnano.2009.380