• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 A
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• pp.193-195
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• 2002

In this paper, a communication module is proposed to be applied to communication between over current relay (OCR) agents in multi agent protection system. A multi agent system can achieve a global goal beyond the ability of each individual agent by working together, in which it is the prerequisite for each agent to be able to exchange or share information or processing status with other agent. The proposed communication module is purposed to enable not only each agent to bring about its own goal, but also the whole protective system to provide much improved coordinated protection. It is applied to a self adaptive protection system for a distribution network using multi agent concept to show its effectiveness.

• 한국의류산업학회지
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• 제15권3호
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• pp.358-363
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• 2013

Due to recent changes in increased life expectancy, economic power and social development, the new senior generation (focusing on people in their fifties) represents a new market power with strong competitiveness. The new senior generation is the generation after the baby boomers, with characteristics that include a high-level of education, increased income, a high-level of consumption, increased assets, self-fulfillment desires and individuality. Demands in the senior fashion industry are expected to gradually increase and the underwear industry that targets the new senior generation is expected to grow rapidly. These demands will require product development for the new senior generation based on emotional and socio-cultural characteristics. The current new senior underwear market is under the process of R&D with a focus on body shape changes; however, there are limited studies on emotional and socio-cultural approaches. This study formulates a basic design plan for different age groups based on an analysis of the situation of bra wear (current inconveniences, demand and needs) by women in their fifties and over. Subsequently, a functional active bra top that considers activity and comfort was proposed for women in their fifties, an all-in-one foundation bra top that shapes the body was proposed for women in their sixties, and comfort bra tops that are comfortable and easy to put on and take off were proposed for women in their seventies and over.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.505-508
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• 2006

Self-heating induced device degradation and its width/length (W/L) dimension dependence were studied in p-type polycrystalline silicon (poly-Si) thin film transistors (TFTs). Negative channel conductance was observed under high power region of output curve, which was mainly caused by hole trapping into gate oxide and also by trap state generation by self-heating effect. Self-heating effect became aggravated as W/L ratio was increased, which was understood by the differences in heat dissipation capability. By reducing applied power density normalized to TFT area, self-heating induced degradation could be reduced.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2005년도 춘계 종합학술대회 논문집
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• pp.410-415
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• 2005

Recent measurements of local-area and wide-area traffic have shown that network traffic exhibits at a wide range of scales - Self-similarity. Self-similarity is expressed by long term dependency, this is contradictory concept with Poisson model that have relativity short term dependency. Therefore, first of all for design and dimensioning of next generation communication network, traffic model that are reflected burstness and self-similarity is required. Here self-similarity can be characterized by Hurst parameter. In this paper, when different many data traffic being integrated under various environments is arrived to communication network, Hurst Parameter's change is analyzed and compared with simulation results.

• 한국정밀공학회지
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• 제18권10호
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• pp.93-100
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• 2001

The analysis and control of a new type unsymmetrical slotted self-bearing step motor for small angle control is presented. The motor actuator is used for both motor and bearing functionality without any additional coil windings or electromagnets for bearing functionality. A circular-arc, straight-line permeance model for the fringing effect is presented. An unsymmetrical slotted self-bearing step motor layout and control algorithm are described. A new control current generation method using the electromagnets layout geometry, which needs no additional current for bearing functionality, is proposed. As the result of this analysis the fringing effect largely influences on the system characteristics. especially in torque. Even if the bearing functionality is added into the motor functionality, it is shown that the magnitude of torque is not changed.

• 한국연소학회지
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• 제20권1호
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• pp.43-51
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• 2015

A study on laminar jet flames in coflow air diluted with helium has been conducted to investigate self-excitations for various propane mole fractions and nozzle exit velocities. The stability map was represented as a function of nozzle exit velocity and fuel mole fraction for propane. The results show that two types of self-excitation were observed : (1) buoyancy-driven self-excitation (hereafter called BDSE) and (2) Lewis-number induced-self-excitation coupled with (1) (hereafter called LCB) near extinction limit for 9.4 mm nozzle diameter. It was shown that with 0.95 mm nozzle diameter, Lewis-number-induced self-excitation (hereafter LISE) and BDSE could be separated. The differences between the two self-excitations were shown and discussed.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2011년도 제40회 동계학술대회 초록집
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• pp.24-25
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• 2011

Molecular self-assembly has several advantages over other nanofabrication methods. Molecular building blocks ensure ultrafine pattern precision, parallel structure formation allows for mass production and a variety of three-dimensional structures are available for fabricating complex structures. Nevertheless, the molecular interaction for self-assembly generally relies on weak forces such as van der Waals force, hydrogen bonding, or hydrophobic interaction. Due to the weak interaction, the structure formation is usually slow and the degree of ordering is low in a self-assembled structure. To promote self-assembly, directed assembly methods employing prepatterned substrates or external fields have been developed and gathered a great deal of technological attention as a next generation nanofabrication process. In this presentation a variety of directed assembly methods for soft nanomaterials including block copolymers, peptides and carbon nanomaterials will be introduced. Block copolymers are representative self-assembling materials extensively utilized in nanofabrication. In contrast to colloid assembly or anodized metal oxides, various shapes of nanostructures, including lines or interconnected networks, can be generated with a precise tunability over their shape and size. Applying prepatterned substrates$^{1,2}$ or introducing thickness modulation$^3$ to block copolymer thin films allowed for the control over the orientational and positional orderings of self-assembled structures. The nanofabrication processes for metals, semiconductors$^4$, carbon nanotubes$^{5,6}$, and graphene$^{6,7}$ templating block copolymer self-assembly will be presented.

• 한국산학기술학회논문지
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• 제13권8호
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• pp.3427-3435
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• 2012

2010년 베이비부머(baby boomer)의 맏형격인 1955년생이 정년퇴직하는 것을 시작으로 본격적으로 베이비부머 세대들이 현직에서 물러나고 있다. 베이비부머의 퇴직은 발달된 의학기술과 향상된 생활수준 그리고 주변 생활환경의 개선 등으로 인하여 곧 기대수명이 길어진 노인계층으로 진입하는 것을 의미하므로 매년 낮아지는 출산율과 맞물려 고령 사회로의 진입 속도를 더욱 빠르게 하고 있다. 이에 베이비부머 세대들의 진로자기효능감과 관련하여 은퇴준비를 알아보고자 첫째, 월 평균소득과 현재 직업에 따른 은퇴준비의 차이분석 둘째, 진로자기효능감이 은퇴준비에 미치는 영향을 연구하였다. 본 연구를 위한 설문조사는 2012. 1. 17.~2. 16까지 1개월 동안 서울, 경기, 강원, 충남, 경남, 전남, 제주도 등에 직접방문 및 우편발송으로 베이비부머 세대를 대상으로 총 500부의 설문지를 배포하여 443부가 회수되었고 이 중 유효한 400명을 연구대상으로 하였다. 그 결과 월 평균소득에 따른 은퇴준비는 경제적, 신체적 요인에서 유의미한 것으로 확인되었으며, 현재 직업에 따른 은퇴준비는 경제적, 신체적, 사회적 등 모든 요인에서 유의한 결과값이 보여졌다. 진로자기효능감이 은퇴준비에 미치는 영향에서는 경제적 요인이 가장 높은 58%의 영향력을 보이며 자기평가, 목표설정, 직업정보, 문제해결의 모든 요인에서 영향을 받는 것으로 확인되었다.

• 가정과삶의질연구
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• 제16권2호
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• pp.179-193
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• 1998

the purpose of this research was to investigate rewards costs and adjustment perceived by adult children in three generation family. Data were collected from 132 marital couples in three generation family in Seoul area. The results of this study showed that there were significant differences in the levels of rewards costs and adjustment variables (self-esteem depression family life satisfaction and marital satisfaction)between husbands are wives. It was also found that wives's costs and husbands' rewards were significantly different across three different types of three generation family. It addition the results of multiple regression analyses indicated that reward was the most powerful variable affecting wives' depression and family life satisfaction and that cost influenced husbands' family life satisfaction and marital satisfaction.

• 대한기계학회논문집
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• 제18권11호
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• pp.2932-2943
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• 1994

An efficient approach to the automatic construction of effective quadrilateral finite element meshes for two-dimensional analysis is presented. The procedure is composed of, firstly, an initial mesh generation and, secondly, an h-version of adaptive refinement based on error analysis. As for an initial mesh generation scheme, a modified looping algorithm has been employed. For the adaptive refinement process, an error indicator obtained by computing the residual error of the equilibrium equations in the energy norm with a relaxation factor has been employed. Examples of mesh generation and self-adaptive mesh improvements are given. These example solutions demonstrate that an effective mesh for a given error tolerance can be obtained in a few steps of the analysis processes.