「葦手下絵和漢朗詠集」の研究（基礎資料編２）

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Simulation study of electron drift and gas multiplication in Micro Pixel Chamber

The physical processes of charge collection and gas multiplication of a Micro Pixel Chamber (mu-PIC) were studied in detail using a three-dimensional simulation. The collection efficiencies of primary electrons and gas multiplication factors were calculated for several electrode structures. Based on those studies, we analyzed the optimization of the electrode structure of the mu-PIC, in order to obtain a high gas gain of more than 10^4 and a simultaneous suppression of discharges. Consequently, we found that these characteristics strongly depend on the substrate thickness and the anode diameter of the mu-PIC. In addition, a gas gain of 10^5 would be expected for a mu-PIC having a thick substrate of > 150um.Comment: 16 pages, 14 figures, Submitted to Nucl. Instr. Methods

Performance of a micro-TPC for a time-resolved neutron PSD

We report on the performance of a micro-TPC with a micro pixel chamber($\mu$-PIC) readout for a time-resolved neutron position-sensitive detector(PSD). Three-dimensional tracks and the Bragg curves of protons with energies of around 1 MeV were clearly detected by the micro-TPC. More than 95% of gamma-rays of 511 keV were found to be discriminated by simple analysis. Simulation studies showed that the total track length of proton and triton emitted from the $\rm {}^{3}He$(n,p(573 keV))$\rm {}^{3}H(191 keV)$ reaction is about 1.2 cm, and that both particles have large energy losses ($\rm > 200 keV/cm$) in 1 atm Ar+$\rm C_{2}H_{6}(10$+${}^{3}$He($< 1$). These values suit the current performance of the micro-TPC, and we conclude that a time-resolved neutron PSD with spatial resolution of sub-millimeters shall be developed as an application of the micro-TPC.Comment: 13 pages, 10 figures, to appear in NIM

HOW ACCELERATE KNOWLEDGE ACQUISITION AND INFORMATION DISTRIBUTION IN THE ORGANIZATIONAL LEANING FROM FAILURE

Knowledge is recognized as a key for sustainable competitive advantage. Knowledge creation and knowledge management are consequently an essential way to win in market. Learning activity from failure as well as learning from successful case may mostly be recognized as an important knowledge creation activity, which aims at preventing from repeating same failure once you experience. Most organizations, however, do poor job at due to learning from failure due to inhibit factors such as disadvantage for promotion and reward, stigma, guilty feelings. There is a unique company, which has succeeded in establishing their way to leaning from failure. Executing the learning activity, they have not repeated same failures which were once reviewed through their system. Eventually they have maintained good business performance. Employing organization learning process in the previous study to define organizational failure leaning process and a unique case in a Japanese company in this paper, we explored keys for success in the organizational learning from failure. We particularly discussed how shame feeling as inhibit factor in the organizational learning from failure was reduced and system efficacy recognition as acceleratory factor was augmented by motivators such as intrinsic knowledge sharing motivation and Organization-based self-esteem (OBSE). We eventually found that altruism, personal growth intention and sympathy were motivators in the company. And we recognized that the OBSE enhanced the intrinsic knowledge sharing motivators. Moreover, we suggested that the intrinsic knowledge sharing motivators could mediate other intrinsic motivator toward knowledge sharing behavior although it should be carefully examined through further studies