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A beam test was executed to evaluate the behavior of the first prototype radiation-hard double-sided silicon microstrip sensor for the SDC silicon tracking system. Pions of 4 GeV/c in a test beamline at KEK illuminated three planes of detectors. The signals were amplified, shaped, and discriminated with TEKZ bipolar analog LSI's, and the on-off levels were(More)
Passive dynamic bipedal walking (PDW) is an attractive topic not only for robotics field but also the other scientific fields, i.e. physics and biology. In order to clarify its mechanism of walking, many researchers have developed various PDW machines. We also have developed several 3-D PDW with flat feet and ankle springs. However there are no researches(More)
We evaluated the preservation of ultra-structure and immunoreactivity in cryosections of central nervous system tissue mounted with and stored in a sucrose-gelatin solution for one month at -20 degrees C or -80 degrees C. The ultra-structure of synaptic structure in these sections was well preserved and comparable to that of freshly cut cryosections.(More)
A simple abstract model is presented to show that a species with a favorable global effect on the whole biota (for example, by generating a moderate temperature range) can be selected through evolution. In the model, fluctuation in the growth rate among species leads to selection. The accompanying fluctuations in the quantity of resources, which return by(More)
We reexamined a Daisyworld model from the traditional view of competition theory. Unlike the original model, white and black daisies in our model incorporate a seeding/germination trade-off against bare ground area without assuming the local temperature reward. As a result, the planetary temperature is automatically regulated by two species if the following(More)
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