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김창석,황석영,서진연,정삼용 조선대학교 동력자원연구소 1995 動力資源硏究所誌 Vol.17 No.1
This paper describes the proper selection method of the power system stabilizer(PSS) parameter for stabilizing operation of a synchronous machine which connected to infinite bus by using pole assignment method. The purpose of PSS is to enhance the damping capability at small frequency oscillation (0.5∼2㎐). It can be achieved by moving the real part of critical eigenvalue (pole) on left side of s-plane. The PSS parameter was selected by using the proposed method to match with a pre-assigned pole associated with poorly damped swing mode. This method has been studied to synthesize the PSS on Yong-Gwang N/P. And the simulation results show that the selected parameter by using proposed method is effective for dynamic and transient stability of power system.
꼬리줄나비고기, Chaetodon wiebeli의 초기발생
이치훈,김병호,노섬,이영돈 제주대학교 해양과환경연구소 2004 해양과환경연구소 연구논문집 Vol.28 No.2
The development of eggs and larvae of the butterflyfish. Chaetodon wiebili were observed. Fertilized eggs were spherical. colorless. and driven into gelatinous masses. They measured 0.75±0.18 in diameter and not contain an oil globule. Hatching taken place 61.0 hours after two celled stage at water temperature 25.6-27.7℃. Newly hatched larvae measured 0.91 nm in total length and had an ovoid yolk of 0.65 nm in longest diameter. In 72 hours after hatching. the larvae grew 1.72 nm in total length. The mouth and anus were open and the melanophore pigments appeared above the eyes. The pectoral fins are formed and the larvae began to swim actively.
가미정,김수미,김영경,남수진,오루미,육지수,이혜인,최미나,최혜민,허다은 이화여자대학교 간호과학대학 2010 이화간호학회지 Vol.- No.44
Purpose: The purpose of this descriptive study is to examine the correlation between nursing students’ perception of nurses and the level of their satisfaction with the major. Method: The survey was done with the total number of 192 nursing students from 10 different universities in S city selected by a convenience samplingmethod. In order to measure the perception of nurses, the measurement which was invented by Lee(1992) and revised by Jang(1998) was used. Also, the measurement designed by Shim, and modified by Kim(2007) was used for measuring of the students’ satisfaction in their major. The collected data was analyzed by SPSS 17.0. Results: 1.The most decisive factor of the conceptualization of the image of nurses for the nursing college students is their experience of meeting nurses as a patient. 2. Students reconsider the role of nurses by experiencing immediate relationships with nurses in field training. 3. Other factors of the survey such as the students’academic year, religion, the field training situation (individual experience, type of the hospital where they experienced the training, and a relationship with the nurse in charge of the training) or the existence of nurses among their family members do not affect the students’ satisfaction. 4. There is a positive correlation between the image of nurses of nursing college students and their satisfaction with the major(0.66). Conclusion: The positive image of nurses is directly related to the students’ satisfaction in the nursing major, which hugely affects on their academic achievements and decisions of career path. Therefore, there should be more efforts to increase the positive perception of nurses among nursing students.
Kim, Young-Sum Korean Institute of Intelligent Systems 1999 한국지능시스템학회논문지 Vol.9 No.4
We will define a base of a fuzzy (quasi-)uniform space and investigate some properties. of bases. In particular for the family ${{\beta}i}_{i{\epsilon}} of fuzzy$ (quasi-)uniform bases on X there exists the coarsest fuzzy (quasi-) uniformity on X which is finer than fuzzy (quasi-)uniform ${\Phi}_{{\beta}i} generated by {\beta}_i for each i{\epsilon}{\Gamma}.$
Development of Content-Based Trademark Retrieval System on the World Wide Web
Kim, Young-Sum,Kim, Yong-Sung,Kim, Whoi-Yul,Kim, Myung-Joon Electronics and Telecommunications Research Instit 1999 ETRI Journal Vol.21 No.1
In this paper, we describe a new trademark retrieval system based upon the content or the shape of trademark. The system has an on-line graphical user interface for the World Wide Web (WWW) that allows user to provide a query in forms of a sketch or a visual image to search for similar trademarks from database. User interfaces for the WWW were implemented by utilizing HTML and Java applets. The query can occur in arbitrary size and orientation. A shape representation scheme invariant to scale and rotation was developed to measure the similarity between two trademarks using the magnitude of Zernike moments as a feature set. Performance evaluation has been carried out with a database of 3,000 trademarks. It takes only about 0.6 second for the retrieval on a 200 MHz Pentium PC. The average recall of the original one among top 30 candidates queried by noisy or deformed images was 100%.
Fast Computation of Zernike Moments Using Three Look-up Tables
Kim, Sun-Gi,Kim, Whoi-Yul,Kim, Young-Sum,Park, Chee-Hang The Korean Institute of Electrical Engineers 1997 Journal of Electrical Engineering and Information Vol.2 No.6
Zernike moments have been one of the most commonly used feature vectors for recognizing rotated patterns due to its rotation invariant characteristics. In order to reduce its expensive computational cost, several methods have been proposed to lower the complexity. One of the methods proposed by mukundan and K. R. Ramakrishnan[1], however, is not rotation invariant. In this paper, we propose another method that not only reduces the computational cost but preserves the rotation invariant characteristics. In the experiment, we compare our method with others, in terms of computing time and the accuracy of moment feature at different rotational angle of an object in image.
Production of Maltopentaose and Biochemical Characterization of Maltopentaose-Forming Amylase
KIM, YOUNG-MIN,RUY, HWA-JA,LEE, SUN-OK,SEO, EUN-SEONG,LEE, SO-YOUNG,YOO, SUM-KYUN,CHO, DONG-LYUN,KIM, DOMAN,ATSUO KIMURA,SEIYA CHIBA,LEE, JIN-HA 한국미생물 · 생명공학회 2001 Journal of microbiology and biotechnology Vol.11 No.4
Bacillus sp. AIR-5, a strain from soil, produced an extracellular maltohentaose-forming amylase from amylose and soluble starch. This bacterium produced 8.9g/l of maltopentaose from 40g/l of soluble starch in a batch fermentation and the maltopentaose made up 90% of the maltooligosaccharides produced (from maltose to maltoheptaose). The culture supernatant was concentrated using a 30K molecular weight cut-off membrane and purified by DEAE-Cellulose and Sephadex G-150 column chromatographies. The purified protein showed one band on a native-PAGE and its molecular mass was estimated as 250kDa. The 250-kDa protein was composed of tetramers of a 63-kDa protein. The isoelectric point of the purified protein was pH 6.9, and the optimum temperature for the enzyme activity was 45℃. The enzyme was quickly inactivated above 55℃, and showed a maximum activity at pH 8.5 and over 90% stability between a pH of 6 to 10. The putative N-terminal amino acid sequence of AIR-5 amylase, ATINNGTLMQYFEWYVPNDG, showed a 96% sequence similarity with that of BLA, a general liquefying amylase.
An Intravertebral Pseudoaneurysm Formed after Infective Spondylitis
Kim Sum,Kang Chang Kyung,Park Hangeul,Kim Young Rak,Kim Jun-Hoe,Lee Chang-Hyun,Chung Chun Kee,Kim Chi-Heon 대한말초신경학회 2023 The Nerve Vol.9 No.2
The surgical treatment of spondylitis involves potential risks, especially when dealing with infected tissues that may be fragile and susceptible to injury from surgical trauma and inflammation. In cases where spondylitis is not controlled even after the initial surgery, unexpected situations can arise if an unusual change in infected tissues around the spine is misinterpreted. The present case involves a 62-year-old who underwent laminectomy, debridement, and stabilization from T12 to L2 due to medically intractable spondylitis caused by methicillin-resistant Staphylococcus aureus. No major bleeding or vascular injury occurred during surgery. However, despite some improvement in pain and weakness, inflammation markers remained elevated and back pain recurred. A computed tomography (CT) scan taken 15 days after surgery showed a round-enhancing lesion inside the L1 vertebra. Although the primary imaging diagnosis suggested a loculated abscess, a round-enhancing lesion raised suspicion of an unusual pseudoaneurysm. A CT angiography confirmed a pseudoaneurysm from the L1 segmental artery, successfully treated with endovascular embolization. After embolization, the patient’s back pain improved, and inflammation markers further decreased with oral antibiotics. This case highlights the possibility of a pseudoaneurysm occurring in cases of spondylitis, emphasizing the importance of considering this entity in the differential diagnosis to ensure proper treatment.