Seamless network Control Technology for Mobile communications

Hironori Fukushima,Masato Eguchi 대한전자공학회 1990 JTC-CSCC : Joint Technical Conference on Circuits Vol.- No.-

29Si-NMR Study of Antiferromagnet CeRh2Si2 Using Single Crystals

Hironori Sakai,Yo Tokunaga,Shinsaku Kambe,Yuji Matsumoto,Tatsuma D. Matsuda,Yoshinori Haga 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3

29Si-NMR Study of antiferromagnet CeRh2Si2 with a tetragonal ThCr2Si2-type structure hasbeen performed using single crystals. The Knight shifts along the a and the c axes have beenmeasured as a function of temperatures in the paramagnetic state. At ambient pressure, the Knightshifts show the Ising-type anisotropy along the c axis, which is similar to the magnetic susceptibility. The hyperfine coupling constants for 29Si along the a and the c axes have been determined fromKnight shift versus static susceptibility plots.

Responding to the Challenge of Climate Change

Hironori Hamanaka 한국환경정책학회 2010 한국환경정책학회 학술대회논문집 Vol.2010 No.11

The Mechanism of White and Brown Adipocyte Differentiation

Hironori Nakagami 대한당뇨병학회 2013 Diabetes and Metabolism Journal Vol.37 No.2

Obesity gives vent to many diseases such as type 2 diabetes, hypertension, and hyperlipidemia, being considered as the main causes of mortality and morbidity worldwide. The pathogenesis and pathophysiology of metabolic syndrome can well be understood by studying the molecular mechanisms that control the development and function of adipose tissue. In human body, exist two types of adipose tissue, the white and the brown one, which are reported to play various roles in energy homeostasis. The major and most efficient storage of energy occurs in the form of triglycerides in white adipose tissue while brown adipose tissue actively participates in both basal and inducible energy consumption in the form of thermogenesis. Recent years have observed a rapid and greater interest towards developmental plasticity and therapeutic potential of stromal cells those isolated from adipose tissue. The adipocyte differentiation involves a couple of regulators in the white or brown adipogenesis. Peroxisome proliferators-activated receptor-γ actively participates in regulating carbohydrate and lipid metabolism, and also acts as main regulator of both white and brown adipogenesis. This review based on our recent research, seeks to highlight the adipocyte differentiation.

Mechanism of the Occurrence of Rotordynamic Fluid Forces on a Closed Type Centrifugal Impeller in Whirling Motion

Hironori Horiguchi,Shinichiro Hata,Yutaro Wada,Julien Richert,Yoshinobu Tsujimoto 한국유체기계학회 2019 International journal of fluid machinery and syste Vol.12 No.4

Rotordynamic fluid forces and a mechanism of their occurrence were examined in experiments and computations for a closed type centrifugal impeller in whirling motion. The rotordynamic fluid force on a front shroud was a main component of the rotordynamic fluid force. In a clearance between the front shroud and a casing, velocity disturbances were caused by an eccentricity of the impeller and a squeeze effect due to the whirling motion of the impeller. Appling the Bernoulli equation to disturbed swirling flow in the clearance in a relative coordinate fixed on the whirling motion, the pressure disturbance which generated the rotordynamic fluid force could be reasonably explained.

The Impact of Rural Votes in Foreign Policies: The FTA Policies under the DPJ Government in Japan

Hironori Sasada 서울대학교행정대학원 2013 Asian Journal of Political Science Vol.21 No.3

The recent trend of bilateral free trade agreements (FTAs) has pressured the governments of many countries to make such arrangements with their trade partners. Since its foundation in 1998, the Democratic Party of Japan (DPJ) has advocated free trade policies, partly because the party was an urban-based party. Thus, many expected that, when the DPJ assumed power in 2009, it would implement free trade policies as it had promised in the past. However, the DPJ government failed to deliver on its promise after spending three and a half years in office. It contrasts sharply with the Korean government under the leadership of Lee Myung-bak, which managed to conclude FTAs with its major trade partners, including the United States and the European Union. Both governments' free trade policies faced strong opposition from the agricultural industry, as farmers in Japan and Korea lacked international competitiveness. What explains the reasons why the Japanese government has been struggling to implement its free trade policies, while its Korean counterpart succeeded in signing a number of FTAs? Focusing primarily on the case of Japan and using the Korean case as reference, this study tries to provide an explanation for this puzzle by analyzing the impact of rural votes in the policy-making process.

Improvement of Two-Stage Centrifugal Blood Pump for Cardiopulmonary Support System and Evaluation of Anti-Hemolysis Performance

Hironori Horiguchi,Tomonori Tsukiya,Toratarou Takemika,Takeshi Nomoto,Yoshinobu Tsujimoto 한국유체기계학회 2015 International journal of fluid machinery and syste Vol.8 No.1

In cardiopulmonary support systems with a membrane oxygenation such as a percutaneous cardiopulmonary support (PCPS) or an extracorporeal membrane oxygenation (ECMO), blood pumps need to generate the pressure rise of approximately 200mmHg or higher, due to the high hydraulic resistances of the membrane oxygenation and of the cannula tubing. In order to realize the blood pump with higher pressure rise, higher anti-hemolysis and thrombosis performances, the development of novel centrifugal blood pump composed of two-stage has been conducted by the authors. In the present paper, effective attempts to decrease the wall shear stress and to suppress the stagnation are introduced for the prevention of hemolysis and thrombosis in blood pumps. The hemolysis test was also carried out and it was clarified that the decrease of wall shear stress is effective as a guideline of design of blood pumps for improving the anti-hemolysis performance.

Two-step Growth of ZnO Nanorods by Using MOCVD and Control of Their Diameters and Surface Densities

Hironori Fujisawa,Chiaki Kobayashi,Seiji Nakashima,Masaru Shimizu 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.8

We investigated the growth of ZnO nanorods on Al2O3(1120) substrates by using metalorganic chemical vapor deposition and demonstrated the ability to control their diameters and surface densities by using a two-step growth method. Following the first step, the ZnO nanorods were found to be densely packed due to random nucleation across the substrate surface, and their diameters and surface densities (numbers per unit area) were interdependent. During the second growth step,because nucleation sites were limited to the tips of existing nanorods, an upper limit was placed on the surface density of the second-layer nanorods. The surface density of the second-layer nanorods was also influenced by the reaction pressure during the second growth step. The diameter of the ZnO nanorods in the second layer was determined by the growth temperature during the second step and could be controlled independently of the surface density. Consequently, ZnO nanorods with small diameters (< 100 nm), low surface densities (< 10 µm−2) and large spacings (> 200 nm), which are difficult grow using a one-step growth method, were successfully produced. The deposition of 180-nm-thick Pb(Zr,Ti)O3 coatings onto sparsely-grown ZnO nanorods was also demonstrated.

Molecular characterization of Japanese indigenous grape cultivar ‘Koshu’ (Vitis vinifera) leaf and berry skin during grape development

Hironori Kobayashi,Keiko Fujita,Shunji Suzuki,Tsutomu Takayanagi 한국식물생명공학회 2009 Plant biotechnology reports Vol.3 No.3

We investigated the transcriptional profiles of Japanese indigenous grape cultivar ‘Koshu’ (Vitis vinifera) leaf and berry skin during ripening. In leaf, 64 genes were abundantly transcribed at the end of ve´raison (14 weeks post-flowering), whereas the expression of 61 genes was upregulated at the end of ripening (20 weeks post-flowering). In berry skin, 67 genes were abundantly transcribed at the end of ve´raison, whereas the expression of 86 genes was upregulated at the end of ripening. Gene expression associated with biological processes was activated in both tissues at the end of ripening. The expression of genes associated with photosynthesis, sugar synthesis, anthocyanin synthesis, cinnamic acid synthesis, and amino acid metabolism was observed in leaf and berry skin during ripening, together with the accumulation of sugars, anthocyanins, cinnamic acids, and amino acids. Transcripts of AUX/IAA family proteins that repress the activities of auxin-induced proteins were expressed in berry skin at the end of ve´raison. Transcripts of genes related to the ubiquitin– proteasome system that degrades AUX/IAA family proteins were abundantly expressed in berry skin at the end of ripening, suggesting that the expansion of skin cells at ve´raison is suppressed by AUX/IAA family proteins, and that the ubiquitin–proteasome system induces the expansion of skin cells during ripening by degrading AUX/IAA family proteins. These transcriptional profiles, which provide new information on the characteristics of ‘Koshu’ grapevine during ripening, may explain the unique characteristics of ‘Koshu’ grape in comparison with those of European grapes used for winemaking, and may contribute to the improvement of ‘Koshu’ grape quality. We investigated the transcriptional profiles of Japanese indigenous grape cultivar ‘Koshu’ (Vitis vinifera) leaf and berry skin during ripening. In leaf, 64 genes were abundantly transcribed at the end of ve´raison (14 weeks post-flowering), whereas the expression of 61 genes was upregulated at the end of ripening (20 weeks post-flowering). In berry skin, 67 genes were abundantly transcribed at the end of ve´raison, whereas the expression of 86 genes was upregulated at the end of ripening. Gene expression associated with biological processes was activated in both tissues at the end of ripening. The expression of genes associated with photosynthesis, sugar synthesis, anthocyanin synthesis, cinnamic acid synthesis, and amino acid metabolism was observed in leaf and berry skin during ripening, together with the accumulation of sugars, anthocyanins, cinnamic acids, and amino acids. Transcripts of AUX/IAA family proteins that repress the activities of auxin-induced proteins were expressed in berry skin at the end of ve´raison. Transcripts of genes related to the ubiquitin– proteasome system that degrades AUX/IAA family proteins were abundantly expressed in berry skin at the end of ripening, suggesting that the expansion of skin cells at ve´raison is suppressed by AUX/IAA family proteins, and that the ubiquitin–proteasome system induces the expansion of skin cells during ripening by degrading AUX/IAA family proteins. These transcriptional profiles, which provide new information on the characteristics of ‘Koshu’ grapevine during ripening, may explain the unique characteristics of ‘Koshu’ grape in comparison with those of European grapes used for winemaking, and may contribute to the improvement of ‘Koshu’ grape quality.

Automated Protein-Expression Profiling System using Crude Protein Direct Blotting Method

Hironori Kobayashi,Yasuhiro Torikoshi,Yuko Kawasaki,Hideki Ishihara,Hiroshi Mizumoto 제어로봇시스템학회 2003 제어로봇시스템학회 국제학술대회 논문집 Vol.2003 No.10