• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.796-797
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• 2011

하이브리드 자동차의 Integrated Starter & Generator (ISG)는 기동 시 높은 토크를 발생시키면서 진동과 소음을 동반한다. 이러한 진동 및 소음은 차량의 품질 확보를 위하여 최소화 시켜야 할 필요가 있다. 본 논문에서는 매입형 영구자석 동기 전동기로 설계된 ISG의 진동 및 소음 저감에 관한 연구에 대하여 다룬다. ISG의 진동 및 소음 저감을 위하여 회전자 코어의 형상 최적설계, 슬롯 수 변경설계 그리고 회전자의 step skew를 적용시켜 각각의 설계방법이 ISG의 진동 및 소음에 미치는 영향을 해석과 실험을 통해 검증하였다.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2543-2545
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• 2004

In this paper, a new multirate digital control technique for the Takagi-Sugeno (T-S) fuzzy system is suggested. The proposed method takes account of the stabilizablity of the discrete-time T-S fuzzy system at the fast-rate sampling points. Our main idea is to utilize the lifted control input. The proposed approach is to obtain the multirate discrete-time T-S fuzzy system by discretizing the overall dynamics of the T-S fuzzy system with the lifted control, and then to derive the sufficient conditions for the stabilization in the sense of the Lyapunov asymptotic stability for this system. An example is provided for showing the feasibility of the proposed discretization method.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.65 no.12
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• pp.2037-2045
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• 2016

This paper presents a fuzzy-model-based design approach to the buoyancy and moment controls of a class of nonlinear underwater glider. Through the linearization and the sector nonlinearity methodologies, the underwater glider dynamics is represented by a Takagi-Sugeno (T-S) fuzzy model. Sufficient conditions are derived to guarantee the asymptotic stability of the closed-loop system in the format of linear matrix inequality (LMI). Simulation results demonstrate the effectiveness of the proposed buoyancy and moment controllers for the underwater glider.

• Korean Journal of Hospice Care
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• v.6 no.2
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• pp.10-18
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• 2006

This study was designed to learn attitudes to euthanasia of nursing student. Data were collected from May 1 to May 30, 2005 by structured questionaires. The respondents joined in the study were 307 nursing student. Data were analyzed using SPSS program by percentage, t-test, one-way ANOVA and scheffe, The results obtained were as follows :1. The mean scores for euthanasia were 3.16 in medical ethics, 2.85 in respect for life, 2.83 in patient's rights, and 2.63 in quality of life, being 2.85 overall. 2. Those who have grade showed significantly higher scores for euthanasia. 3. About 56% of the respondents did not agree that passive euthanasia is justifiable, and 55% did not like performance of euthanasia. 4. The group admitting that passive euthanasia is ethically justifiable showed significantly higher scores in the patient's rights(t=6.031, p=.000), the respect for life(t=5.280, p=.000) and the medical ethics(t=5.558, p=.000) than the group which do not admit. 5. The group which would perform passive euthanasia showed significantly higher scores in the patient's rights(t=6.329, p=.000), the respect for life(t=6.339, p=.000), the quality of life (t=1.993, p=.047) and the medical ethics(t=6.240, p=.000) than the group which would not perform passive euthanasia.

• Journal of the Korean Institute of Intelligent Systems
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• v.23 no.1
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• pp.65-71
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• 2013

In this paper, we address fault detection observer design problem of T-S fuzzy systems with sensor fault. To detect fault, T-S fuzzy model-based observer is used. By introducing $\mathfrak{H}$_ performance index, an observer is designed as sensitive to fault as possible. The fault is then detected by a fault decision logic. The design conditions are derived in terms of linear matrix inequalities. An illustrative example is provided to verify the effectiveness of the proposed fault detection technique.

• Journal of Information Management
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• v.37 no.4
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• pp.25-47
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• 2006

A terminology system capable of providing interpretations and classification information on a multilingual science and technology(S&T) terminology is essential to establish an integrated search environment for multilingual S&T information systems. This paper aims to build a base system to manage an integrated information system for multilingual S&T terminology search. It introduces a method to build a search system for S&T terminologies internally linked through the multilingual semantic network and a search technique on the multiple linked nodes. In order to provide a foundation for further analysis researches, it also attempts to suggest a basic approach to interpret terminology clusters generated with those two search methods.

• Korean Journal of Environmental Biology
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• v.22 no.2
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• pp.295-299
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• 2004

The lacertid lizard Takydromus wolteri widely distributed in South Korea, but intraspecific diversity of this species was not almost studied. T. wolteri represented by 8 specimens collected from 5 localities were analyzed by the Randomly Amplified Polymorphic DNA (RAPD) method with 28 random decamer primers and the phenogram constructed by using the Unweighted Pair Group Method with Arithmetic Mean (UPGMA) method based on RAPD data. The populations of T. wolteri using in this paper were collected from Gyeonggi-do, Chungcheongbuk-do, Jeju-do, Jeollanam-do and Gyeongsangnam -do in South Korea. Among 68 different bands detected in RAPD analysis, 59 bands (87％) showed polymorphism. The phenogram showed that the populations of T. wolteri were grouped into two. These results suggest that T. wolteri were supported intraspecific diversity.

• Annual Conference of KIPS
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• 2019.10a
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• pp.446-448
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• 2019

암호 기술은 보안에 있어 필수적인 요소이며, 암호 키는 암호기술의 안전성에 있어 가장 핵심적인 요소이다. 시스템의 보안을 위해서는, 암호 키를 안전하게 생성하고 관리하는 것이 중요하다. 생체정보 같은 민감한 데이터를 주고받는 다양한 경량 디바이스나 센서들로 구성된 IoT 환경에서도, 암호 키는 중요한 보안 요소이다. IoT 기술이 발전하면서, 일반 PC나 스마트폰이 아닌 경량 디바이스에서도 일반적인 인터넷 환경에서 활용되는 통신프로토콜 및 보안기술들이 활용된다. 특히, 가장 많이 이용되는 TLS 프로토콜은 IoT 환경에서도 활발히 이용되고 있다. 본 논문에서는 보안프로토콜 TLS의 키 생성 과정을 분석하고 IoT 환경에서 자주 활용되는 라이브러리를 조사하였다.

• Journal of the Korean association of regional geographers
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• v.3 no.2
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• pp.19-35
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• 1997

The purpose of this study is to find out the characteristics of landform in Geoje-Do using GIS and DTED data. The characteristics of landform in Geoje-Do are as follows; First, the height-range of Geoje-Do is $0{\sim}580m$, and the average elevation of it is 124m. Volcanic and granite region is mainly appeared at high elevation-region. But, we can't find out outstanding difference of elevation, according to its geology. The second. the slope-range of Geoje-Do is $0{\sim}52$ degree, and the average slope of it is 17.6 degree. The slope of volcanic and granite area is more steeper than any other region. But the results of analysis of the geology in Geojo-Do, don't show outstanding difference of the slope. The third, the area-rate of the aspect of Geoje-Do is almost same in all direction. And the area-rate of south-west direction is the highest. According to the geology of Geoje-Do, granite is distributed the most widely, and the area of volcanic and granite occupy 60% of entire island's area. According to analysis of influence of geology with elevation, geology has little relationship with elevation. According to analysis of geology and drainage network, streams are inclined to be developed well in Alluvium area. Drainage network is well developed throughout the entire island, except southeast area. The highest order of stream is 4 in 1:25,000 topographic map. The density of stream in Geoje-Do is very high, such as 1.6. The bifurcation-ratio of stream is also higher than 4 in all order. The length-ratio of stream is ranged from 1.24 to 3.25. According to the relationship between order and elevation. order is the greater, elevation is the lower. According to the relationship between order and slope, order is the greater, slope is the gentler. In this study, we use DTED Data, and compare it with topographic map data. According to the comparison, there is a little difference between DTED data and topographic map data. Therefore, to use DTED data in landform analysis, it is required coordinate matching process. This process is very important, and take very long time. Thus, if you use DTED in landform analysis, some processes are required. DTED data can be taken very easily, but its using is not simple. Because coordinate adjust is very hard work.

• Journal of the Korean Society of Clothing and Textiles
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• v.37 no.4
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• pp.514-525
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• 2013

Korea International Trade Association (KITA) statistics show that the import of circular-knitted clothes has suddenly increased since 2000; they have increased by 24.5% each year for 2000-2004 and by 8.2% for 2005-2009. In addition, a Korea Apparel Industry Association survey showed that more than 50% of young people in their 20s and more than 40% of mid-aged people in their 30s-40s wore T-shirts (the most frequently worn and/or regarded as the most comfortable item among knit clothes). This portion is expected to increase in the future; however, insufficient research has been conducted on the characteristics of product development and production, knit T-shirt pattern development (Park, 2011), and consumer purchase patterns and behavior for knit clothes. The evaluation criteria for knit clothes generally vary depending on the demographic characteristics of consumers (Kotler & Armstrong, 2006). This study conducted a wearing trends survey for circular-knitted T-shirts and fit satisfaction based on 318 male and female consumers in their 20s-30s. The results provide information on the basic materials required to produce circular-knitted T-shirts.