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New Records of Three Paraprionospio Species (Polychaeta: Spionidae) from Korean Waters
Hisashi Yokoyama,최진우 한국해양과학기술원 2010 Ocean science journal Vol.45 No.1
The spionid polychaete Paraprionospio pinnata (Ehlers 1901) has been widely reported from Korean waters. We examined some specimens belonging to the genus Paraprionospio that had been collected from Korean waters, and identified them as Paraprionospio coora Wilson, 1990, Paraprionospio cordifolia Yokoyama, 2007 and Paraprionospio patiens Yokoyama, 2007, which are new to the fauna of Korea. The present study suggests misidentification of the specimens that have been previously reported as P. pinnata from Korean waters.
Yokoyama, Yoshie,Jelenkovic, Aline,Sund, Reijo,Sung, Joohon,Hopper, John L.,Ooki, Syuichi,Heikkilä,, Kauko,Aaltonen, Sari,Tarnoki, Adam D.,Tarnoki, David L.,Willemsen, Gonneke,Bartels, Meike,van B Cambridge University Press 2016 TWIN RESEARCH AND HUMAN GENETICS - Vol.19 No.2
<P>We analyzed birth order differences in means and variances of height and body mass index (BMI) in monozygotic (MZ) and dizygotic (DZ) twins from infancy to old age. The data were derived from the international CODATwins database. The total number of height and BMI measures from 0.5 to 79.5 years of age was 397,466. As expected, first-born twins had greater birth weight than second-born twins. With respect to height, first-born twins were slightly taller than second-born twins in childhood. After adjusting the results for birth weight, the birth order differences decreased and were no longer statistically significant. First-born twins had greater BMI than the second-born twins over childhood and adolescence. After adjusting the results for birth weight, birth order was still associated with BMI until 12 years of age. No interaction effect between birth order and zygosity was found. Only limited evidence was found that birth order influenced variances of height or BMI. The results were similar among boys and girls and also in MZ and DZ twins. Overall, the differences in height and BMI between first- and second-born twins were modest even in early childhood, while adjustment for birth weight reduced the birth order differences but did not remove them for BMI.</P>
Yokoyama, Tomoki,Doi, Nobuaki,Ishioka, Toshiya The Korean Institute of Power Electronics 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.3
This paper proposes an autonomous decentralized control for a parallel connected uninterruptible power supply (UPS) system based on a fast power detection method using a FPGA based hardware controller for a single phase system. Each UPS unit detects only its output voltage and current without communications signal exchange and a quasi dq transformation method is applied to detect the phase and amplitude of the output voltage and the output current for the single phase system. Fast power detection can be achieved based on a quasi dq transformation, which results in a realization of very fast transient response under rapid load change. In the proposed method, the entire control system is implemented in one FPGA chip. Complicated calculations are assigned to hardware calculation logic, and the parallel processing circuit makes it possible to realize minimized calculation time. Also, an Nios II CPU core is implemented in the same FPGA chip, and the software can be applied for non-time critical calculations. Applying this control system, an autonomous decentralized UPS system with very fast transient response is realized. Feasibility and stable operation are confirmed by means of an experimental setup with three UPSs connected in parallel. Also, rapid load change is applied and excellent performance of the system is confirmed in terms of transient response and stability.
The Japan Health Physics Society Guideline on Dose Monitoring for the Lens of the Eye
Yokoyama Sumi,Tsujimura Norio,Hashimoto Makoto,Yoshitomi Hiroshi,Kato Masahiro,Kurosawa Tadahiro,Tatsuzaki Hideo,Sekiguchi Hiroshi,Koguchi Yasuhiro,Ono Koji,Akiyoshi Masahumi,Kunugita Naoki,Natsuhori 대한방사선방어학회 2022 방사선방어학회지 Vol.47 No.1
Background: In Japan, new regulations that revise the dose limit for the lens of the eye (hereafter the lens), operational quantities, and measurement positions for the lens dose were enforced in April 2021. Based on the international safety standards, national guidelines, the results of the Radiation Safety Research Promotion Fund of the Nuclear Regulation Authority, and other studies, the Working Group of Radiation Protection Standardization Committee, the Japan Health Physics Society (JHPS) developed a guideline for radiation dose monitoring for the lens.Materials and Methods: The Working Group of the JHPS discussed the criteria of non-uniform exposure and the management criteria set not to exceed the dose limit for the lens.Results and Discussion: In July 2020, the JHPS guideline was published. The guideline consists of three parts: main text, explanations, and 26 examples. In the questions, the corresponding answers were prepared, and specific examples were provided to enable similar cases to be addressed.Conclusion: With the development of the guideline on radiation dose monitoring of the lens, radiation managers and workers will be able to smoothly comply with revised regulations and optimize radiation protection.
"Computer Programming IV" as Capstone Design and Laboratory Attachment
Yokoyama, Shoichi Korean Society for Engineering Education 2012 공학교육연구 Vol.15 No.5
A new obligatory subject, Computer Programming IV, is organized in the Department of Informatics, Faculty of Engineering, Yamagata University. The purposes of the subject are as follows: (1) Attachment to each laboratory for bachelor thesis was usually at the initial stage of the student's fourth academic year. This subject actually moves up the attachment because students are tentatively attached to a laboratory for this subject. The interval to complete their bachelor thesis is extended by half a year. (2) In each laboratory, students cooperate with each other to complete their project. The project becomes capstone design which JABEE (Japan Accreditation Board for Engineering Education) is recently emphasizing. We not only explain the introduction of this subject, but also report some case studies.
Yokoyama, Atsutoshi,Han, Jung Eun,Karlin, Kenneth D.,Nam, Wonwoo The Royal Society of Chemistry 2014 Chemical communications Vol.50 No.14
<P>Reaction of a nonheme iron(<SMALL>III</SMALL>)-peroxo complex, [Fe<SUP>III</SUP>(14-TMC)(O<SUB>2</SUB>)]<SUP>+</SUP>, with NO<SUP>+</SUP>, a transformation which is essentially isoelectronic with that for nitric oxide dioxygenases [Fe(<SMALL>III</SMALL>)(O<SUB>2</SUB>&z.rad;<SUP>−</SUP>) + NO], affords an iron(<SMALL>IV</SMALL>)-oxo complex, [Fe<SUP>IV</SUP>(14-TMC)(O)]<SUP>2+</SUP>, and nitrogen dioxide (NO<SUB>2</SUB>), followed by conversion to an iron(<SMALL>III</SMALL>)-nitrato complex, [Fe<SUP>III</SUP>(14-TMC)(NO<SUB>3</SUB>)(F)]<SUP>+</SUP>.</P> <P>Graphic Abstract</P><P>Reaction of a nonheme iron(<SMALL>III</SMALL>)-peroxo complex, [Fe<SUP>III</SUP>(14-TMC)(O<SUB>2</SUB>)]<SUP>+</SUP>, with NO<SUP>+</SUP> affords an iron(<SMALL>IV</SMALL>)-oxo complex, [Fe<SUP>IV</SUP>(14-TMC)(O)]<SUP>2+</SUP>, and nitrogen dioxide (NO<SUB>2</SUB>), followed by conversion to the nitrato complex, [Fe<SUP>III</SUP>(14-TMC)(NO<SUB>3</SUB>)(F)]<SUP>+</SUP>. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3cc48782b'> </P>