Semiconductor Behavior of Passive Films Formed on Cr with Various Additive Elements

Tsuchiya, Hiroaki,Fujimoto, Shinji,Shibata, Toshio 한국부식방식학회 2003 Corrosion Science and Technology Vol.2 No.1

Photoelectrochemical response and electrochemical impedance behavior was investigated for passive film formed on sputter-deposited Cr alloy in 0.1 kmol·m^(-3). Photoelectrochemical action spectrum could be separated into two components, which were considered to be derived from Cr₂O₃ (E_g ∼ 3.6 eV) and Cr(OH)₃, (E_g ∼ 2.5 eV). The band gap energy, E_g, of each component was almost constant for various applied potentials, polarization periods and alloying additives. The photoelectrochemical response showed negative photo current for most potentials In the passive region. Therefore, the photo current apparently exhibited p-type semiconductor behavior. On the other hand, Mott-Schottky plot of the capacitance showed positive slope, which means that passive film formed on Cr alloy has n-type semiconductor property. These apparently conflicting results are rationally explained assuming that the passive film on Cr alloy formed in the acid solution has n-type semiconductor property with a fairly deep donor level in the band gap and forms an accumulation layer in the most of potential region in the passive state.

Measurement of Indicated Mean Effective Pressure

TSUCHIYA, Kazuo,AOKI, Mitsuhiko,Tetsuji, KOYAMA,KAWA, Tsunemichi,KAMIMOTO, Takeyuki 경상대학교 공과대학 항공기계공학부 1999 WORKSHOP 자료집 Vol.1999 No.1

A convenient new type digital Pmi meter using a personal computer with A/D and PIO cards was developed. The Pmi meter takes an attention to low frequency harmonics in the range of 10-300 Hz in pressure wave form. It has advantage in the number of computations and accuracy as compared with a conventional method. The accuracy depends on the number of pressure data sampled per cycle, however if the sample numbers more than thirty-six for four cycle engines are selected, the error is kept approximately within 1.2%. It is accurate enough for practical usage. For monitoring Pmi, it is possible to use smaller sample numbers. The Pmi meter developed has possibility as onboard apparatus for engine control.

Lay Beliefs, Knowledge, and Attitudes Towards Cancer: a Pilot Study in Japan

Tsuchiya, Miyako Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.8

Background: The attendance rates for cancer screening are low in Japan. Little is actually known about how the Japanese perceive cancer. Since beliefs about illness affect individuals' health care practice, the aim of this study was to explore beliefs about cancer and factors associated with those beliefs, focusing on representative cancer sites. Materials and Methods: Japanese adults (${\geq}20$ years old) who had not been diagnosed with any cancers and were not health care professionals were recruited, using a convenience sampling approach. A total of 91 participants completed questionnaires including open-ended questions. Thematic analysis was used to analyze the responses. Results: Five themes were suggested: (i) a threatening illness that might greatly change one's future life; (ii) basic cancer knowledge; (iii) a curable illness with early detection and adequate treatment; (iv) causes of cancer; and (v) anyone can develop cancer. Families or friends' negative consequences of cancer were associated with negative beliefs about the disease. Gestational cancer was the most representative site of most themes. Conclusions: A threatening illness (e.g., death or incurable illness) was the most common belief among the Japanese laypeople. Importance of early detection and treatments should be more emphasized, and future screening programs should include strategies modifying negative cancer beliefs among Japanese laypeople.

EFFECT OF STOCHASTIC EVENTS AND FLOW REGIME ON THE DIVERSITY OF BENTHIC FAUNAL COMMUNITIES

TSUCHIYA MITSUKUNI,MOROTA KEIJI 한국수자원학회 2005 한국수자원학회 학술대회 Vol.2005 No.1

The Atoms for Peace USIS Films

Tsuchiya Yuka(츠치야 유카) 고려대학교 한국사연구소 2014 International Journal of Korean History Vol.19 No.2

1955년, 도쿄에 있는 미국공보원(USIS)은 히로시마와 나가사키 원폭 10주년을 기념하는 <원자력의 축복 Blessing of Atomic Energy>이라는 30분 분량의 다큐멘터리를 제작했다. 이 다큐멘터리 영화는 일본 정부 및 연구자, 기업들을 상대로 미국 아르곤 국립연구소가 농업, 의학, 위생학, 산업, 재난 예방 등의 “평화적인” 목적을 위해 제공한 방사성 동위원소radio-isotopes의 사용법을 소개한다. 영화는 또한 원자력 발전의 메커니즘을 보여주고 있으며, 미국이나 유럽에서는 이미 원자력이 상용화되어 있음을 설명한다. 원자폭탄이라는 외상적 경험 후 10년이 지난 뒤, 원자력의 “평화적” 사용의 “축복”을 즐기는 이러한 일본인들에 대한 이미지는 일본 전역뿐만 아니라 영국, 핀란드, 인도네시아, 수단, 베네수엘라 등 다양한 나라의 언어로 번역되어 전세계 각국에 소개되었다. 이 영화는 아이젠하워 대통령의 “평화를 위한 원자력” 캠페인, 즉 핵 에너지의 민간 사용 측면에서 미국이 선두하고 있는 글로벌 정보 보급 프로그램을 위해 제작된 50여 가지의 교육 다큐멘터리 영화의 일부였다. 본 논문에서는 냉전 시대 초기 핵 에너지의 “평화적” 사용에 관한 정보를 널리 보급시키는 역할을 수행했던 USIS 영화들의 역할에 대해 고찰하고자 한다. In 1955, the U.S. Information Service (USIS) Tokyo produced a thirty-minute documentary film Blessing of Atomic Energy in commemoration of the tenth anniversary of the Atomic bombing of Hiroshima and Nagasaki. The film introduced how the Japanese government, researchers, and companies were using radioisotopes offered by the U.S. Argonne National Laboratory for the “peaceful” purposes in agriculture, medicine, hygiene, industry, and disaster prevention. The film also showed the mechanism of atomic power generation, and explained that it was already put into practice in the U.S. and Europe. The images of Japanese people enjoying the “blessing” of the “peaceful” use of atomic energy, ten years after the traumatic experience of A-bombs, were not only shown all over Japan, but also translated into different languages and shown in many countries, including the UK, Finland, Indonesia, Sudan, and Venezuela. The film was part of some fifty educational and documentary films produced for President Eisenhower’s “Atoms for Peace” campaign . a global information dissemination programs on the U.S. leadership in the civilian use of nuclear energy. This paper will explore the roles USIS films played in disseminating information on the “peaceful” use of nuclear energy in the early Cold War era.

Oxidative Stress in Organ Microcirculatory Disturbances : Application of Multifunctional Digital Microfluorography

Tsuchiya, Masaharu 대한소화기학회 1994 대한소화기학회지 Vol.26 No.7

Effect of Satellite Bubbles on Dynamics of Gas Absorption from a CO2 Bubble into a Downward - Flowing Liquid

Tsuchiya, Katsumi,Koshihata, Masanobu,Tomida, Tahei,Saito, Takayuki 한국화학공학회 1999 Korean Journal of Chemical Engineering Vol.16 No.5

The dynamic process of gas absorption from a CO₂ bubble into a liquid is examined in the presence of satellite bubbles. The bubble under consideration is held stationary, except its jittering, by the liquid flowing downward. The mass transfer rate is determined by monitoring the rate of reduction in the equivalent bubble diameter during the initial absorption process. It is found that the interaction with the satellite bubbles generally hampers the dissolution of the primary bubble. The extent of reduction in the dissolution rate increases with the net contacting time during the interaction. When the secondary bubbles interact with the primary bubble mainly outside of its wake, however, the dissolution tends to be enhanced due to induced turbulence in the surrounding liquid flow. A simple theoretical model is developed to simulate the observed results as well as the basic features prevailing in a recently proposed scheme, called the GLAD system, for shallow injection of CO₂ gas into seawater.

Ball Mill Classifier의 새로운 개념과 신기술

Tsuchiya Shozo 한국시멘트협회 2002 시멘트 심포지움 Vol.29 No.-

Irisin response to downhill running exercise in humans

Yoshifumi Tsuchiya,Sahiro Mizuno,Kazushige Goto 한국운동영양학회 2018 Physical Activity and Nutrition (Phys Act Nutr) Vol.22 No.2

[Purpose] To determine the effects of exercise-induced muscle damage, we examined irisin responses during level running (LR), with less muscle damage, and downhill running (DHR), with greater muscle damage under equivalent exercise duration and oxygen consumption (V3O2) conditions. [Methods] Fifteen healthy men (age: 21.6 ± 2.0 y, height: 170 ± 1.3 cm, weight: 64.8 ± 2.7 kg) were randomly assigned to either the LR group (n = 8) or the DHR group (n = 7). Subjects in the LR group performed treadmill running at 70% of maximum oxygen uptake (V3O2max) for 30 min on a 0% gradient. In contrast, subjects in the DHR group performed the same exercise on a –10% gradient. Blood samples were collected before exercise, immediately after exercise, and 1, 3, and 24 h after exercise. [Results] No significant interaction (group × time) or main effect of group or time was observed for changes in plasma irisin concentrations over time (P > 0.05). However, the area under the curve of plasma irisin concentrations during a 3-h post-exercise period was significantly greater in the DHR (239,197 ± 8,166 ng/mL) group than in the LR (92,293 ± 8,755 ng/ml) group (P < 0.05). The blood lactate, serum cortisol, myoglobin, and plasma interleukin-6 concentrations were significantly higher in the DHR group than in the LR group after exercise (P < 0.05 for all variables). [Conclusion] DHR associated with marked muscle damage promoted a greater increase in exercise-induced irisin did LR after the same duration under identical VO2 conditions.

Recent Advances in Toxicology of Metals: An Overview

Kanzaburo Tsuchiya 가톨릭대학산업의학센타 산업의학연구소 1991 韓國의 産業醫學 Vol.30 No.3