منابع مشابه
These feet were made for walking
New fossil footprints excavated at the famous Laetoli site in Tanzania suggest that our bipedal ancestors had a wide range of body sizes.
متن کاملPoker-DVS and MNIST-DVS. Their History, How They Were Made, and Other Details
This article reports on two databases for event-driven object recognition using a Dynamic Vision Sensor (DVS). The first, which we call Poker-DVS and is being released together with this article, was obtained by browsing specially made poker card decks in front of a DVS camera for 2-4 s. Each card appeared on the screen for about 20-30 ms. The poker pips were tracked and isolated off-line to co...
متن کاملThe SMS Bandwagon in Norway: What made the market?
Short Message Service (SMS) has been an overwhelming success in Europe, substantially larger than in the United States. In relative terms Norway represents one of the largest SMS markets in the world. The aim of the paper is to examine the relationship between economic theories of bandwagon effects, and the Norwegian mobile providers’ management of the SMS market. We narrow the focus to the pro...
متن کاملHow it's made: the synapse.
How are synapses made? This question is one of the most important issues in neurobiology today and has been the subject of intense study in recent years. This review focuses on the mechanisms of presynaptic terminal formation in the mammalian central nervous system. Building a synapse requires stabilization of contacts between axons and dendrites and formation of synaptic subcellular structures...
متن کاملHow Saqaliba slaves were transferred to Andalusia in the Umayyad period
Slave bargain that was common in the West of Europe for a long time continued after the conquer of Andalusia by Muslims in the last decade of the first century A.H. Meanwhile, slaves from the northern regions of Spain, especially Slavic lands, entered the Andalusian markets. These slaves, known in medieval Islamic sources as Saqaliba, were often bought by Jewish merchants and transferred to And...
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ژورنال
عنوان ژورنال: Nature
سال: 1885
ISSN: 0028-0836,1476-4687
DOI: 10.1038/032177a0