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스핀들 구동용 분포권 타입 매입형 영구자석 동기 전동기 특성해석
이석희(Suk-Hee Lee),김성일(Sung-Il Kim),권순오(Soon-O Kwon),홍정표(Jung-Pyo Hong) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
Interior Permanent Magnet Synchronous Motor(IPMSM) have the advantage having both magnetic and reluctance torque, and this leads to higher power density of motor volume than the other type of motors. In addition, wide operation speed range can be easily archived by field weakening control. High power density and wide speed range are required in spindle drive. In designing IPMSM, this paper presents the comparison of motor characteristics according to core materials and the effect of link thickness in rotor is investigated. Core materials dealt in this paper are chosen for high speed application and link thickness design is also consideration of high speed for robust rotor structure. Therefore, the comparison results in this paper will be useful choosing core materials and rotor design for high speed applications such as spindle drive.
중학교 남·여 학생의 학생건강체력평가(PAPS) 등급에 따른 신체적 자기개념의 차이
이석희(Suk Hee Lee),이창진(Chang Jin Lee) 한국체육측정평가학회 2014 한국체육측정평가학회지 Vol.16 No.1
본 연구는 중학교 남.여 학생의 학생건강체력평가(PAPS) 등급에 따른 신체적 자기개념의 차이를 규명하여 기초자 료를 제공하는데 목적을 두고 있다. 연구대상은 충청북도 C시 소재 C중학교 전체 1, 2, 3학년 남학생 288명, 여학생 251명으로 총 539명을 선정하였다. 신체적 자기개념에 대한 설문지 조사는 타당도와 신뢰도 분석을 실시한 후 사용하 였다. 자료 분석을 위해 IBM SPSS Statistics 19.0 프로그램을 사용하여 탐색적 요인분석, Cronbach’s . 분석, 일원 분산분석(one-way ANOVA)과 사후검증 방법으로 LSD를 실시하였다. 이상의 자료 분석을 기초로 얻어진 결과는 다 음과 같다. 첫째, 남학생의 경우 1학년에서는 2, 3, 4등급에 따라 지구력, 외모, 체지방, 신체전반, 근력, 건강, 스포츠 자신감 요인에서 유의한 차이가 있으며, 2학년에서는 1, 2, 3등급에 따라 지구력, 외모, 체지방, 유연성, 스포츠자신감 요인에서 유의한 차이가 있는 것으로 나타났다. 3학년에서는 2, 3, 4등급에 따라 지구력, 외모, 체지방, 유연성, 신체전 반, 스포츠자신감 요인에서 유의한 차이가 있는 것으로 나타났다. 둘째, 여학생의 경우 1학년에서는 2, 3, 4등급에 따 라 체지방, 유연성, 스포츠자신감 요인에서 유의한 차이가 있으며, 2학년에서는 1, 2, 3등급에 따라 지구력, 유연성, 신 체전반, 스포츠자신감 요인에서 유의한 차이가 있는 것으로 나타났다. 3학년에서는 2, 3, 4등급에 따라 지구력, 외모, 체지방, 유연성, 스포츠자신감 요인에서 유의한 차이가 있는 것으로 나타났다. 결론적으로 중학생들의 PAPS 등급이 높을수록 남·여 모두 전반적으로 신체적 자신감도 높다는 것으로 나타났다. 즉, 운동을 지속적으로 하는 학생이 자기 신체에 대한 자신감이 높은 것으로 나타났다. This research was meant to provide the basic information which determines the difference that arise from different PAPS rate. Subject groups were 288 male students and 251 female students who were currently enrolled in C middle school in C County in Chung Cheonbuk-Do. The survey about the physical self-concept has been used after analyzing relevance and credibility. To analyze the source, IBM SPSS Statistics 19.0 had been used to analyze the key reasons, Cronbachs·analysis, and one-way ANOVA and LSD had been performed as a posterior tests. The results based on the test described above are as below: First, in male student`s case, in grade 1, there had been a positive disparity in stamina, appearance, body fat, overall physique, muscular strength, overall health, and confidence about being good at sports in the rate 2, 3, and 4. In grade 2, depending on the rate 1, 2, and 3 there has been a positive difference in endurance, appearance, body fat, flexibility, and sports confidence. Lastly in grade 3, positive disparity had appeared in endurance, appearance, body fat, flexibility, whole body, and sports confidence depending on rate 2, 3, and 4. Second, in female student`s case, first graders had shown a positive difference in body fat, flexibility, and sports confidence whereas the second graders had shown a positive disparity in endurance, flexibility, whole body, and sports confidence depending on the rate 1, 2, and 3. For the third graders, positive difference had been shown in endurance, body fat, flexibility, and sports confidence complying with the rate 1, 2, and 3. In conclusion, as the PAPS rate gets higher, both male and female students had shown stronger confidence about their physique. This leads to the theory that students, who exercise constantly, have stronger confidence about their body.
이석희(Seok Hee Lee),선민진(Min Jin Sun),최미숙(Mi Suk Choi),이동욱(Dong Wook Lee) 대한두경부종양학회 2011 대한두경부 종양학회지 Vol.27 No.1
Paraganglioma is a relatively rare, generally benign and slow growing tumor arising from widely distributed paraganglionic tissue thought to originate from the neural crest. In the head and neck region, paraganglionic tissue is distributed in the superior and inferior paraganglia such as the carotid body, the vagal body, and the jugulotympanic region. Approximately 10% of patients with paraganglioma have a family history of such tumors. Multiple lesions can be found in 26% of patients with family history. It is important to distinguish between paraganglioma and atypical carcinoid tumor and medullary thyroid cancer. This can be done with histopatho-logic evaluation and immunohistochemical markers. Complete excision is recommended for the treatment of this tumor. Paraganglioma is particularly aggressive and rapid recurrence of paraganglioma is common after local resection. We present a case of malignant paraganglioma in the neck which recurred 2 months after local resec-tion. We suppose that radiation therpay could be the last option for the treatment in this clinical setting.
매입형 영구자석 전동기의 파라미터 검증을 위한 인덕턴스 산정
이석희(Suk-Hee Lee),이상호(Sang-Ho Lee),반지형(Ji-Hyoung Bahn),홍정표(Jung-Pyo Hong) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In case of a difference exist between the experimental value and estimated value of back-emf, there can be a difference of tum number or residual flux density of permanent maget of the motor. In order to presume the tum number, the average length for each coil is used to calculate the resistance. However in producing the motor, due to the tension of coil, the outer diameter of coil becomes smaller, and then the resistance estimated by average length for each coil is not correct. Therefore in this paper, through the comparison of experiment value and estimated value of inductance, a method of presuming the tum number and PM's residual flux density of an IPM motor is presented. The inductance of IPM motor changes with the rotor position, therefore the rotor part is taken out and then the inductance in open circuit condition is measured. In the analytical calculation, 3D FEM(Finite Element Method) is used, which can consider the leakage flux of end turns in frinzing effect.
마늘 흑색썩음균핵병 방제 길항세균 Burkholderia pyrrocinia CAB08106-4의 대량배양 조건
이동국 ( Dong Guk Lee ),이은숙 ( Eun Sook Lee ),김정석 ( Jeong Seok Kim ),백철기 ( Cheol Ki Baek ),박매솔 ( Mae Sol Park ),박은희 ( Eun Hee Park ),이석희 ( Suk Hee Lee ),정창국 ( Chang Kook Chung ) 한국균학회 2013 韓國菌學會誌 Vol.41 No.1
Burkholderia pyrrocinia CAB08106-4 was parceled out from the Chungnam Agricultural Research and Extension Center, Korea to evaluate the antagonistic activity against garlic white rot caused by Sclerotium cepivorum. The optimum cultural conditions including temperature, pH, enzyme activity, carbon and nitrogen sources were determined. The optimum culture conditions of B. pyrrocinia CAB08106-4 were 28oC, 150 rpm and pH 7. Chitinase only showed activity among several tested enzymes. The highest cell growth was obtained with 1% glucose and 0.1% (NH4)2SO4, respectively.
JPEG 영상의 저작권 보호를 위한 Digital Watermarking 알고리즘
박은숙,우종원,이석희,허윤석,조기형,Park, Eun-Suk,Woo, Jong-Won,Lee, Seok-Hee,Heo, Yoon-Seok,Cho, Ki-Hyung 한국정보처리학회 2000 정보처리논문지 Vol.7 No.1
In this paper, we propose the method of embedding the encrypted digital watermark in quantization coefficient when we encode the image data in the process of JPEC. The proposed method is as following. After a DCT coefficient of each block is quantized, we arrange the quantization coefficient as on dimension with a zigzag scan and replace each block. By applying even-odd feature of frequency of the encrypted watermark to a quantization coefficient of some fixed domain of replaced each block and embedding it, we obtain the compressed image data by encoding after placing it in the order prior to replacement. The advantages of the proposed method here are as follows: We can embed many information keeping a secret as much as possible by using the algorithm of block replacement. We can control the amount of embedding of each use, as we embed the encrypted information by selecting some fixed domain of a quantization coefficient, we can fix the embedding data regardless of the image and the value of quantization. We verified the results by experiments and analyzed the efficiency of them in comparison with the former study. 본 논문에서는 암호화된 디지털 워터마크를 JPEG 부호화 과정 중 양자화 계수에 합성하는 디지털 워터마킹 방법을 제안한다. 제안된 워터마킹 방법은 다음과 같다. 먼저 각 블록의 DCT 계수를 양자화 한 후 지그재그 스캔으로 양자화 계수를 1차원으로 배열하여 각 블록을 치환한다. 치환된 각 블록의 일정 영역의 양자화 계수에 암호화된 워터마크를 주파수의 우기성을 적용, 합성한다. 합성이 끝난 후 치환되기 전 순서로 다시 복원하여 부호화 과정을 거쳐 압축된 영상데이터를 얻는다. 본 논문에서 제안된 방식은 합성 전 블록 치환 알고리즘을 사용함으로써 보안을 최대한 유지하면서 많은 정보를 합성할 수 있다. 또한 양자화 계수의 일정 영역을 선택하여 암호화된 정보를 합성하기 때문에 용도에 따른 합성량을 조절 할 수가 있고, 영상 및 양자화 값과 상관없이 합성 데이터를 고정시킬 수 있는 장점이 있다. 본 논문에서는 실험을 통해서 그 결과를 검증하고 기존 연구와의 비교 및 그에 따른 성능을 분석하였다.