• 식물분류학회지
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• 제37권2호
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• pp.203-215
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• 2007

일본인 전문식물재집자인 T. Uchiyama는 1900년과 1902년 두 번에 걸쳐 한반도의 식물채집을 실시하였다. T. Uchiyama의 수집물은 일본인으로서는 최초의 한반도 식물에 대한 채집활동의 결과로 생각되며, 당시 채집된 식물표본은 T. Nakai에 의해 Flora Koreana와 H. $L{\acute{e}}veill{\acute{e}}$ 연구 재료로 사용되었다. 본 연구는 동경대학 식물표본관에 소장된 T. Uchiyama의 채집표본과 문헌을 중심으로 당시의 채집 경로와 일정을 확인하여 채집일과 장소를 날짜순으로 정리하였으며 표본에 채집자에 의해 직접 기록된 자료와 Nakai에 의해 표기된 지명을 제공하였다. 문헌을 근간으로 추정된 전체 채집 표본수는 약 1.674개로 확인되나 현재 동경대학 표본관에 소장된 표본은 200여점에 불과하여 상당한 차이를 보인다. 표본의 2/3는 두 번째 채집인 1902년에 수집되었으며, Nakai는 이중 41개의 표본을 새로 기재한 종의 기준표본으로 사용하였다.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2004년도 High Temperature Superconductivity Vol.XIV
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• pp.7-7
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• 2004

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2004년도 High Temperature Superconductivity Vol.XIV
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• pp.13-13
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• 2004

• 대한구순구개열학회:학술대회논문집
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• 대한구순구개열학회 1997년도 종합학술대회
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• pp.54-54
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• 1997

• 대한수학회보
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• 제51권2호
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• pp.357-371
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• 2014

We shall show that the Riesz idempotent $E_{\lambda}$ of every *-paranormal operator T on a complex Hilbert space H with respect to each isolated point ${\lambda}$ of its spectrum ${\sigma}(T)$ is self-adjoint and satisfies $E_{\lambda}\mathcal{H}=ker(T-{\lambda})= ker(T-{\lambda})^*$. Moreover, Weyl's theorem holds for *-paranormal operators and more general for operators T satisfying the norm condition $||Tx||^n{\leq}||T^nx||\,||x||^{n-1}$ for all $x{\in}\mathcal{H}$. Finally, for this more general class of operators we find a sufficient condition such that $E_{\lambda}\mathcal{H}=ker(T-{\lambda})= ker(T-{\lambda})^*$ holds.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2002년도 proceedings of the second asia international conference on tribology
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• pp.189-190
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• 2002

Rolling-sliding friction was investigated for three SBR (styrene-butadiene rubber) specimens including silica-filled, HAF carbon black-filled, and SAF carbon black-filled SBR. When a rubber wheel was rolled against a glass disk, the coefficient of friction varied with the slip ratios. The coefficient of friction for the silica-tilled SBR showed the highest value of the rubber specimens examined under various slip ratios. The contact areas of silica-filled SBR were larger than those of the carbon black-filled SBRs, as indicated the modulus of the silica-filled SBR showing the lowest value. The contact area during rolling-sliding friction was always smaller than those during the static contact. The friction force at the unit contact area for the silica-filled SBR under braking and driving was higher than those of carbon black-filled SBRs.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -3
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• pp.1535-1538
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• 2002

The flexibility of content addressable mem-ory (CAM) can greatly be extended through the use of trits (ternary digits) Trits consist of binary logical values “0” and “1” with addition of “x” (“dont’t care”). The “dont’t care“is extremely useful for providing com- pact representation of sets of bit strings. In this paper, we propose a new ternary CAM with Hamming distance search functions. Each memory cell in the CAM consists of a pair of lambda diodes which can store trits, namely, a logical “0”, “1” and “x” (“dont’t care“). The CAM can compare stored data and an input data in parallel, and find stored data with Hamming distance within a certain range (“near match“). Also, the interrogation characteristics of the ternary CAM are analyzed in detail. Furthermore, the results obtained these analyses are fully confirmed by simulation using the circuit analysis program HSPICE.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국제학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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• pp.513-518
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• 1993

In this paper, we consider the handling f a flexible object using dual-arm manipulators. We choose both the side arms as rigid, and the objects to be manipulated as flexible. Our purpose is to realize position control for the flexible object while suppressing its vibration. In particular, the problem taken up here is the stability of the control system while manipulating the object. We propose that the traditional approach to investigate the robot system be expanded to include the object's characteristics (thus transferring the stability of the robot system into the full assembly system). We define a handling characteristic while manipulating the object. Finally, the relationship between the handling characteristic and the positional constraint condition in the hold position of the arms is studied while considering the stability of the control system.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 2002년도 Proceedings
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• pp.11-12
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• 2002

Accidental overexposures by radiotherapy have gathered attention recently in Japan. The widely publicized accidents have occurred at the government official benefit society hospital and at the hospital affiliated to a medical school. The accident at the government official benefit society hospital occurred when one of two existing accelerators was renewed. A radiotherapy planning system was also introduced at that time. Then treatment planning for the old and the new linear accelerator was performed using the system. There were variations in wedge factors for the 30 degrees wedge filter between the old and the new linear accelerator. That is, the difference in the structure of the wedge filter (30 degrees) resulted in variations of the wedge factors between both accelerators. In order to keep strength, a lead board was backed to the lead wedge filter for the new linear accelerator, whereas the wedge filter for the old one was made of the iron. The X-ray attenuation of the iron wedge filter is smaller than that of the lead wedge filter. The basic beam data of the old linear accelerator, however, wasn't delivered properly between the user and the maker. Then, the accident took place because the same wedge factor was used for the old and the new linear accelerator. On the other hand, the accident which occurred at the university hospital was brought about by the input mistake in initialization of the computer system when a linear accelerator was introduced. The input mistake was found when the software of the system was updated. If the dose had been measured and confirmed adequately, the accidents could have been prevented in both cases.

• 여성건강간호학회지
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• 제8권4호
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• pp.471-481
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• 2002

The purpose of this study was to investigate knowledge and attitude about oral contraceptive between Korean and Japanese university students in order to provide better sex education programs and direcrion. Korean subjects of this study were 337 university students in M city, during the period from April 1 to April 20, 2001 and Japanese subjects 245, during the period from June to August, 2001. Collected data were analyzed using descriptive statistics, t-test, Pearson correlation coefficients with SPSS package. The results from this study were summarized as follows : 1. The mean age of Koreans and Japanese students was $21.0{\pm}3.2$ and $19.6{\pm}3.2$ years old. The number of Japaneses youths having the parter with sexual intercourse was larger than that of Korean university students. 2. Comparison of knowledge and attitude about oral contraceptives between Korean and Japanese university students ; 1) Comparison of sexual differences : Oral contraceptives related knowledge of Korean university students marked $55.7{\pm}7.5$ of male students and $56.7{\pm}6.2$ of females with a range of 15 to 75. The level of female students' knowledge was higher than that of male's but there is not statistically a significant difference (p=.080). Oral contraceptives related attitude of Korean university students marked $81.1{\pm}12.2$ of male students and $76.9{\pm}10.3$ of female's with a range of 24 to 120. The level of male students' attitude was higher than that of female's and there is statistically a significant difference(p= 002). Oral contraceptives related knowledge of Japanese university students marked $55.3{\pm}6.7$ of male students and $57.0{\pm}6.3$ of female students. The level of female students' knowledge was higher than that of male's but there is not statistically a significant difference (p=.159). Oral contraceptives related attitude of Japanese university students marked $80.3{\pm}10.1$ of male students and $80.4{\pm}9.9$ of female students. The level of female students' attitude was higher than that of male's and there is not statistically a significant difference(p= .928). 2) Comparison between the country : Oral conceptives related knowledge of Korean university students marked $56.2{\pm}6.8$ and $56.7{\pm}6.4$ of Japanese university students with a range of 15 to 75. The level of Japanese university students' knowledge was higher than that of Korean's but there is not statistically a significant difference(p= .361). Oral conceptives related attitude of Korean university students marked $78.9{\pm}11.4$ and $80.4{\pm}9.9$ of Japaneses with a range of 24 to 120. The level of Japanese university studentss' attitude was higher than that of Korean's and there is not statistically a significant difference(p=.100). 2. Wanted age of oral contraceptives taking medicine and age was correlated positively (r=.178, p=.004) and total knowledge score of oral contraceptives and total attitude score were correlated positively(r=.467 p= .000) in Korean university students. Wanted age of oral contraceptives taking medicine and age was correlated positively (r=.289, p=.004), age and total attitude score were correlated positively(r=.196 p=.002) and total knowledge score of oral contraceptives and total attitude score were correlated positively (r=.671 p=.000) in Japanese university students. 3. Korean university students lifted side effect by the greatest factors in investigation about leading person that disturb work oral contraceptive, and the following appeared by knowledge insufficiency, sexual feeling inflammation worry, social prejudice, sexual morality decline, supernumerary prescription being not right, other person reverse and economical burden. Japanese university students can know that it is appearing by side effect, supernumerary prescription being not right, knowledge insufficiency, sexual feeling inflammation worry, economical burden, social prejudice, sexual morality decline and other person reverse. Think that this is result by dissimilar health medical system and cultural difference between two countries.