A SHORT NOTE ON BIHARMONIC SUBMANIFOLDS IN 3-DIMENSIONAL GENERALIZED (𝜅, 𝜇)-MANIFOLDS

Sasahara, Toru Korean Mathematical Society 2016 대한수학회보 Vol.53 No.3

We characterize proper biharmonic anti-invariant surfaces in 3-dimensional generalized (${\kappa}$, ${\mu}$)-manifolds with constant mean curvature by means of the scalar curvature of the ambient space and the mean curvature. In addition, we give a method for constructing infinity many examples of proper biharmonic submanifolds in a certain 3-dimensional generalized (${\kappa}$, ${\mu}$)-manifold. Moreover, we determine 3-dimensional generalized (${\kappa}$, ${\mu}$)-manifolds which admit a certain kind of proper biharmonic foliation.

A short note on biharmonic submanifolds in 3-dimensional generalized $(\kappa, \mu)$-manifolds

Toru Sasahara 대한수학회 2016 대한수학회보 Vol.53 No.3

We characterize proper biharmonic anti-invariant surfaces in $3$-dimensional generalized $(\kappa, \mu)$-manifolds with constant mean curvature by means of the scalar curvature of the ambient space and the mean curvature. In addition, we give a method for constructing infinity many examples of proper biharmonic submanifolds in a certain $3$-dimensional generalized $(\kappa, \mu)$-manifold. Moreover, we determine $3$-dimensional generalized $(\kappa, \mu)$-manifolds which admit a certain kind of proper biharmonic foliation.

現代の韓國の漢字,日本の漢字

사사하라히로유키 ( Sasahara Hiroyuki ) 이화여자대학교 한국문화연구원 2013 한국문화연구 Vol.25 No.-

한국의 한자에 대해서는 그 역사와 정책의 변천과 배경에 대해 종종 연구되어 왔다. 또한 한국의 구체적인 한자들을 연구하며 고대의 한·일 교류와 영향관계를 밝히는 것도 매우 흥미로운 연구이다. 이러한 연구들은 수차례 언급되었고 그 실증적인 작업도 진행되고 있으나 현대 한자의 상황에 대해서는 그다지 연구된 사례가 적다. 본고에서는 문헌과 웹, 거리의 간판, 유학생의 필기 등을 관찰한 것을 기본으로 일본 한자와의 비교를 통해 현대 한국 한자의 역할을 크게 ‘단어를 명시하는 역할’, ‘장식적 역할’, ‘감상적 역할’의 단계로 분류하여 각 경우의 예와 함께 논의를 진행하였다. 가령 ‘단어를 명시하는 역할’의 경우, 현대 한국어에서 공적인 표기의 표준에 있어 한글 전용을 지향하고 있는데, 이런 경우 표음문자인 한글에 한자어의 동음어가 존재하기 때문에 신문, 학술논문 등에서 「( )」를 사용하여 한자를 함께 표기하는 것이 발견된다. ‘장식적 역할’은 한글 전용의 문장에서 한 글자만 한자를 기호적으로 사용하는 방식이다. 가령 상품이나 기업, 상점 간판명에 ‘美’ 혹은 ‘辛’이 포함되는 것이 그 예이다. 이 경우 한자가 가진 형태감을 기호적으로 사용하였다면, 마지막 ‘감상적 역할’은 한자가 가진 이미지를 채택한 것이라고 할 수 있다. 보통 한자는 역사와 전통, 동양, 중국 등의 이미지 구축에 기여하고 있는데, 특히 이름에 한자어를 사용하는 한국의 경우, 고유어를 한글로 표기하고 또 그 음에 맞는 한자를 맞추는 것, 즉 ‘더블미닝’(ダブルミ-ニング, Double meaning)이 나타나고 있다. 한편, 한국에서 한자를 잃고(사용하지 않으며) 일어난 현상에 대해서는 점차 어떠한 말의 유래가 고유어인가 한자어인가에 대한 의식이 희박해지고, 추상적이거나 전문 용어에 대한 분석이 이루어지지 않은 상태에서 한 덩어리의 소리의 연속으로만 인식되거나, 동일한 음으로 가진 다른 한자 단어의 구분을 불가능하게 하는 점에 대해 논의하였다. 현대에도 한·일간 한자와 한자어의 이러한 교류는 계속되고 있다. 일본에서는 한자어로 구성되었지만 역시 한글로 표기된 고유 한국어 단어, 가령 인명이나 한류스타 그룹명 등을 한국어발음대로 표기하는 방향으로 변화하고 있다. 한글표기가 일반적인 한국 또한 일제의 음역어가 한국 한자음에 변환된 단어들이 그대로 사용되고 있다.

日本製漢字の地域分布 : ??·??を例に ??·??을 사례로 Two characters pronounced iri

笹原宏之 한국일어일문학회 2003 日語日文學硏究 Vol.46 No.1

Anthocyanin and proanthocyanidin contents, antioxidant activity, and in situ degradability of black and red rice grains

Hosoda, Kenji,Sasahara, Hideki,Matsushita, Kei,Tamura, Yasuaki,Miyaji, Makoto,Matsuyama, Hiroki Asian Australasian Association of Animal Productio 2018 Animal Bioscience Vol.31 No.8

Objective: An experiment was conducted to assess the antioxidant contents and activities of colored rice grains and to evaluate their nutritive characteristics in terms of chemical composition and in situ ruminal degradation. Methods: Ten cultivars of colored rice grains (Oryza sativa L.) collected from several areas of Japan were studied, and control rice without pigment, maize, barley, and wheat grains were used as control grains. Their chemical compositions, pigment, polyphenol contents, total antioxidant capacity (TAC), and degradation characteristics were determined. Results: The starch contents of the colored rice grains were in the range of 73.5% to 79.6%, similar to that of the control rice grain. The black and red rice grains contained anthocyanin (maximum: $5,045.6{\mu}g/g$) and proanthocyanidin (maximum: $3,060.6{\mu}g/g$) at high concentrations as their principal pigments, respectively. There were significantly (p<0.05) positive relationships among the pigment contents, polyphenol content, and TAC values in the colored and control rice grains, indicating that the increase in pigment contents also contributed to the increased polyphenol content and TAC values in the colored rice grains. The dry matter and starch degradation characteristics, as represented by c (fractional degradation rate of slowly degradable fraction) and by the effective degradability, of the colored rice grains and the control rice grain were ranked as follows among commonly used grains: wheat>barley${\geq}rice$>maize. The colored rice grains also included the most-digestible starch, since their potential degradable fraction and actual degradability at 48 h incubation were almost 100%. Conclusion: Colored rice grains have high potential to be used as antioxidant sources in addition to starch sources in ruminants.

日本語文字資源の基盤整備 : システム開發を支える異體字の認知科學 시스템 개발을 지지하는 이체자의 인지과학

橫山詔一,笹原宏之 한국일어일문학회 2003 日語日文學硏究 Vol.46 No.1

Development of the Shell Structures Fabrication CAM System for Direct Metal Lamination Using Arc Discharge -Lamination Height Error Compensation by Torch Feed Speed Control-

Takeyuki Abe,Hiroyuki Sasahara 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.

The direct metal lamination is a kind of the additive manufacturing process using the arc welding technology; where the molten metalmade by the arc discharge is accumulated successively in this process. Overhanging shapes can be fabricated without supportmaterials but lamination height error is caused in largely inclined area. In this paper, the lamination height error was estimated byusing the accumulated metal shape model. Then, the lamination height error was compensated by changing welding torch feed speedso that the top surface of the laminated layer became horizontal. As a result, not only the lamination height error was decreased by50%, but average inclination angle error was decreased by 50%.

Novel Pathogenetic Mechanism in a Clinical Isolate of Yersinia enterocolitica KU14

Sato Yoshinori,Kaneko Kenichi,Sasahara Takeshi,Inoue Matsuhisa The Microbiological Society of Korea 2006 The journal of microbiology Vol.44 No.1

Yersinia enterocolitica induces a broad range of gastrointestinal syndromes, including acute enteritis. We previously reported that the clinical isolate, Y. enterocolitica KU14, which lacks pYV, was still capable of causing clinical infection. The present study demonstrated that KU14 did not trigger the death of macrophages in vitro, unlike WA-314 (ATCC51871, which harbors the pYV virulence plasmid). However, the intracellular growth of KU14 in the macrophages was greater than that of WA-C (ATCC51872, a non-plasmid harboring the derivative pYV plasmid). Treatment with a cholesterol-binding drug $(\beta-cyclodextrin)$ that affected lipid rafts resulted in a dramatic reduction in the inracellular growth of KU14. These data clearly indicate that the enhanced inracellular growth of KU14 is related to lipid raft-mediated infection.

Predictors of Poor Outcome in Patients with Acute Cerebral Infarction

Nobuhiro Dougu,Shutaro Takashima,Etsuko Sasahara,Yoshiharu Taguchi,Shigeo Toyoda,Tadakazu Hirai,Takashi Nozawa,Kortaro Tanaka,Hiroshi Inoue 대한신경과학회 2011 Journal of Clinical Neurology Vol.7 No.4

Background and Purpose Plasma D-dimer levels are elevated during the acute phase of cerebral infarction (CI). We investigated whether the D-dimer level on admission and other clinical characteristics could be used to predict the poor outcome of patients with acute CI. Methods The clinical characteristics and plasma D-dimer levels measured within 3 days of onset were compared according to outcome among patients with acute CI. Results In total, 359 consecutive patients (mean age, 71.8 years) were examined, of which 174 had a poor outcome [score on the modified Rankin scale (mRS) ≥3] at 30 days after hospitalization. The mean mRS score was higher and a poor outcome was observed more frequently among women than among men (p<0.001 for each). The proportions of women, cardioembolism, atrial fibrillation, advanced age (≥75 years), prior history of CI or transient ischemic attack, and elevated D-dimer level (≥1.0 μg/mL) were significantly higher among patients with a poor outcome than among those with a good outcome. A multivariate analysis showed that elevated D-dimer level [≥1.0 μg/mL; odds ratio (OR), 2.45; 95% confidence interval (95% CI),1.52-3.89; p<0.01], advanced age (OR, 1.93; 95% CI, 1.21-3.07; p<0.01), and female gender (OR, 1.75; 95% CI, 1.08-2.83; p=0.02) were independent predictors of a poor outcome. Conclusions Certain clinical characteristics (gender and advanced age) and an elevated Ddimer level upon admission can be used to predict the outcome of patients with acute CI at 30 days after hospitalization.

Novel Pathogenetic Mechanism in a Clinical Isolate ofYersinia enterocolitica KU14

Matsuhisa Inoue,Kenichi Kaneko,Takeshi Sasahara,Yoshinori Sato 한국미생물학회 2006 The journal of microbiology Vol.44 No.1

Yersinia enterocolitica induces a broad range of gastrointestinal syndromes, including acute enteritis. We previously reported that the clinical isolate, Y. enterocolitica KU14, which lacks pYV, was still capable of causing clinical infection. The present study demonstrated that KU14 did not trigger the death of macrophages in vitro, unlike WA-314 (ATCC51871, which harbors the pYV virulence plasmid). However, the intracellular growth of KU14 in the macrophages was greater than that of WA-C (ATCC51872, a non-plasmid harboring the derivative pYV plasmid). Treatment with a cholesterol-binding drug (β-cyclodextrin) that affected lipid rafts resulted in a dramatic reduction in the intracellular growth of KU14. These data clearly indicate that the enhanced intracellular growth of KU14 is related to lipid raft-mediated infection.