Ultimate low system dark count rate for superconducting nanowire single-photon detector

The dark count rate (DCR) is a key parameter of single-photon detectors. By introducing a bulk optical band-pass filter mounted on a fiber-to-fiber optical bench cooled at 3 K and blocking down to 5 micrometer, we suppressed the DCR of a superconducting nanowire single-photon detector by more than three orders of magnitude. The DCR is limited by the blackbody radiation through a signal passband of 20 nm bandwidth. The figure of merit, system detection efficiency, and DCR were 2.7 x 10^11, 2.3 %, and 0.001 Hz, respectively. Narrowing the bandwidth to 100 GHz suppresses the DCR to 0.0001 Hz and the figure of merit increases to 1.8 x 10^12.Comment: to appear in Optics Letter

PHYSICAL AND PSYCHOLOGICAL HEALTH PROBLEMS AMONG JAPANESE FAMILY CAREGIVERS

2011-08The authors commenced research in 2005 with the goal of on constructing a health support system for primary caregivers. This ongoing study aims to develop a health support program and construct a system of regional assistance based on examining the health situation of family caregivers. Furthermore, it aims to present proposals that will put the minds of citizens at ease in respect to their ability to live in a super aging society. A survey was conducted with 213 male and female caregivers and a control group of 477 community residents not engaged in care. This paper collates the various research findings reported in journals and conference presentations by the authors. Among both male and female caregivers, blood pressure levels required regulation. Among female caregivers, grip strength and musculoskeletal symptoms were worse than those in the control group, even when participants were matched for age. We attempted to determine the characteristics of caregivers who have strong feelings of responsibility and obligation toward their provision of care. Age was a significantly higher factor in the group with stronger feelings in that regard. The group with weaker feelings of responsibility and obligation was younger. The percentage of participants who were caring for a spouse, living with a spouse, had no secondary caregivers, or were providing all-day care, was significantly higher in the group with stronger feelings of responsibility and obligation. There was no significant difference between the groups in the mean total score on the J-ZBI-8 that measures burden of care. As the aging population of Japan grows larger, support for caregivers with physical and psychological health problems, and at the very least, concern of government administrators and the general public, will assume greater importance.departmental bulletin pape

Ultimate low system dark-count rate for superconducting nanowire single-photon detector

journal articl

<地域研究>選択型コンジョイント分析による情報提供がバイオマスプラスチックの消費者選好に与える影響の分析

departmental bulletin pape

The Development of Social Education in Modern Japan : (Part1)

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CNS transcriptomes respond to caloric restriction in a region- and age-dependent manner

<p><b>Copyright information:</b></p><p>Taken from "Gene expression atlas of the mouse central nervous system: impact and interactions of age, energy intake and gender"</p><p>http://genomebiology.com/2007/8/11/R234</p><p>Genome Biology 2007;8(11):R234-R234.</p><p>Published online 7 Nov 2007</p><p>PMCID:PMC2258177.</p><p></p> CNS gene expression responses to CR. Metabolic and signaling pathways in which genes were significantly affected by CR in all five CNS regions. Red, upregulated; blue, downregulated. CNS AAGs reverted by CR. The percentage of AAGs reverted by CR is shown at the top of each bar. Note that the spinal cord exhibits a much larger percentage of upregulated AAGs that are reverted by CR compared to the other CNS regions. Gene lists are in Table S4a,c in Additional data file 1

Benthic deep-sea fauna in the Sea of Kumano, Mie Prefecture, Japan

application/pdfIn this study, we had investigated the benthic deep-sea fauna using the dredge and beam trawl in the region from the continental shelf to the continental slope of the Sea of Kumano, Mie Prefecture, during the No．1722 research voyage of the training ship Seisui-Maru of Mie University. The survey was carried out at 16 stations covering a depth range of 113－1059 m. The results of the survey, 14 phyla had been confirmed. Arthropod, echinoderm, annelid and molluscan macrobenthos were collected from all of the stations. The phylum number of each station was in the range from 4 to 11. The largest number of phyla had been confi rmed at St．10D of boulders bottom（768－800 m depth）. Meiobenthos confi rmed in our sample were kinorhynchs, nematodes, tardigrades, loriciferans and small arthropods such as tanaidaceans, copepods and cumaceans. In addition to free-living species, parasitic copepods, isopods, platyhelminthes, acanthocephalans and nematodes had been found in fish, crustaceans and polychaetes.departmental bulletin pape