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        • KCI등재

          에너지 변환 이론에 의한 액추에이터 권선부의 주파수 특성 해석에 관한 연구

          김양호,이해경,황석영 한국조명전기설비학회 2004 조명·전기설비학회논문지 Vol.18 No.4

          In this paper, an electrical equivalent circuit is derived by solving system equations. A frequency characteristics graph is calculated and the characteristics curve of the linear Actuator Model System are simulated by the Matlab program The frequency characteristics of a linear actuator are analyzed on the structure of the linear Actuator Model System This paper proposed and analyzed the linear Actuator Model(LAM) by using Matlab program with linear actuator was verified computer simulation based on the energy conversion theory. 본 논문에서는 Magnetic Levitation Model 시스템을 이용하여 선형 액추에이터의 기본모델을 제안하고 전원 공급부의 입력 주파수의 변화로부터 액추에이터에 나타나는 현상을 Matlab프로그램을 활용하여 간접적 방법으로 고찰하였다. 그 결과는 실제적인 설계에 적용할 경우 설계 프로그램의 자료나 부분적 변경 시 참조 할 수 있으리라 사료된다. 본 논문에서 제안한 에너지 변환을 고려한Linear Actuator M3d진 시스템의 출력은 입력 주파수의 변화로부터 액추에이터가 고주파보다는 저주파에서 권선부에 나타나는 파형의 응답이 기준 입력파형에 더 근접함을 알 수 있었다. 이 결과를 바탕으로 Linear Actuator Model 시스템의 동작 시 특성이 실제 시스템에 활용할 때 간접적 방법으로 상당히 유용함을 확인 할 수 있었다.

        • KCI등재

          옥외 작업에서의 온열환경 평가 및 온열지수 비교

          김양호,오인보,이지호,재훈,정인성,임학재,박정근,박정선 한국환경보건학회 2016 한국환경보건학회지 Vol.42 No.2

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          Objectives: The objective of this study was to assess heat stress, compare heat stress indices, and evaluate theusefulness of wet bulb globe temperature (WBGT) among outdoor workers exposed to heat during the summerseason. Methods: WBGT, dry temperature, and heat index were measured using WBGT measurers (QUESTemp 32model and QUESTemp 34 model, QUEST, WI, USA) by industrial hygienists from August 27 to September 16,2015. Heat stress indices were measured at the workplaces of a shipbuilder in Ulsan and a construction site inDaegu. The dry temperature observed by the Automated Synoptic Observing System (ASOS) of the KoreaMeteorological Administration was also compared. Results: Dry temperature measured by WBGT is different from that by ASOS. The temperature obtained fromASOS was less than 33℃ , above which point a heat wave is forecast by the Korea Meteorological Administration. A heat index above 32.8℃ as a moderate risk was not observed during measurement. WBGT was consistentlyhigher than 22℃ , above which the risk of heat-related illness is increased in unacclimated workers involved inwork with a high metabolic rate. WBGT was sometimes higher than 28℃ , above which the risk of heat-relatedillness is increased in acclimated workers involved in work with a moderate metabolic rate in September. Conclusion: According to the measurement of heat stress indices, WBGT was more sensitive than heat indexand temperature. Thus, general measures to prevent heat-related diseases should be implemented in workplacesduring the summer season according to WBGT.

        • KCI등재

          모자보호시설 아동을 위한 교육 프로그램 개발 및 평가

          김양호,박정희,유계숙,전춘애 대한가정학회 2002 Family and Environment Research Vol.40 No.6

          The purpose of this study is to develop and evaluate a family life education program for children of institutionalized single-mother families. Based on the strong family perspective and empirical research in this field, the program was developed to enhance children's self-esteem and social ability, and to help children accept diverse family patterns. The program consists of four 60-minute sessions. Ten children and their mothers in two institutions for single-mother families participated in this program. The results of program evaluation revealed that this program was helpful for promoting children's personality development and strengthening their family life of institutionalized single-mother families. Conclusions and implications are discussed.

        • KCI등재

          모자보호시설 입소모자가정의 가족생활 실태에 관한 연구 : 서울시 모자보호시설 종사자와 입소 어머니의 요구도 조사를 중심으로

          김양호,박정희,유계숙,전춘애 대한가정학회 2002 Family and Environment Research Vol.40 No.3

          The purpose of this study is to explore family life issues of institutionalized single-mother families in Seoul. Using in-depth interviews and self-administered questionnaires, this study is focused on the needs assessments of social workers and institutionalized single-mothers. Subjects were 4 social workers and 31 institutionalized single-mothers. The results of study showed that institutionalized single-mother families experienced economic, child rearing, emotional problems, negative stigma and the loss of social networks. Future research, theoretical and practical implications are added.

        • KCI등재

          신뢰가 조직시민행동과 공유학습에 미치는 영향에 관한 연구

          김양호 대한경영학회 2003 大韓經營學會誌 Vol.38 No.-

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          Trust is the backbone of esprit de corps among organizational members. It provides employees with initiatives and commitments toward the organizational goal attainment, and, in turn, enhances organizational performance such as productivity and profitability. Despite its importance in understanding organizational behavior and performance, however, it is relatively unknown in the literature that how this trust-performance linkage works. This study theoretical1y and empirical1y analyzes both the determinants and consequences of trust at the individual member level. In particular, in order to measure organizational members' consequences of trust this study will operationalize organizational member commitment variable by organizational citizenship behavior and learning by sharing. Also, this study will analyze moderating effects of individual member characteristics in the relationship. This research project develops theoretical model, and conducts empirical analysis based on original survey data and various multi-variate statistical techniques. This research follows several earlier studies; I) Mayer's study for general framework of preceeding factors of trust, 2) Rouseau's study of the typology of type of trust, 3) studies of Triandis, Bontemnp, and Val1areal, and Giffin and Patton, for individual member characteristics, and 4) Alder and Organ's study for groupings of trust-based behavior. In sum, this study theoretically and empirically analyzes the determinants of organizational trust, type of trust, and trust-based behavior with moderating effects of individual member characteristics. The main contribution of this research is the development of theoretical framework and execution of empirical analyses toward the better understanding of trust-building in business organization and its impact on organizational performance.

        • KCI등재후보

          신뢰가 조직시민행동과 공유학습에 미치는 영향에 관한 연구

          김양호 대한경영학회 2003 大韓經營學會誌 Vol.16 No.4

          Trust is the backbone of esprit de corps among organizational members. It provides employees with initiatives and commitments toward the organizational goal attainment, and, in turn, enhances organizational performance such as productivity and profitability. Despite its importance in understanding organizational behavior and performance, however, it is relatively unknown in the literature that how this trust-performance linkage works. This study theoretically and empirically analyzes both the determinants and consequences of trust at the individual member level. In particular, in order to measure organizational members' consequences of trust this study will operationalize organizational member commitment variable by organizational citizenship behavior and learning by sharing. Also, this study will analyze moderating effects of individual member characteristics in the relationship. This research project develops theoretical model, and conducts empirical analysis based on original survey data and various multi-variate statistical techniques. This research follows several earlier studies; 1) Mayer's study for general framework of preceeding factors of trust, 2) Rouseau's study of the typology of type of trust, 3) studies of Triandis, Bontemnp, and Vallareal, and Giffin and Patton, for individual member characteristics, and 4) Alder and Organ's study for groupings of trust-based behavior. In sum, this study theoretically and empirically analyzes the determinants of organizational trust, type of trust, and trust-based behavior with moderating effects of individual member characteristics. The main contribution of this research is the development of theoretical framework and execution of empirical analyses toward the better understanding of trust-building in business organization and its impact on organizational performance.

        • KCI등재

          발포 및 세척 공정 근로자의 공기중 Methylene Chloride 노출 농도와 혈중 Carboxyhemoglobin 수준간의 상관관계에 관한 연구

          김양호,신용철,이광용 한국산업위생학회 1999 한국산업보건학회지 Vol.9 No.1

          The objectives of this study were to evaluate exposures to airborne methylene chloride and postshift carboxyhemoglobin (COHb) in blood of workers engaged in processes using blowing or cleaning agents, and to investigate correlation between methylene chloride concentrations and the blood COHb levels of workers. The geometric mean (GM) of workers' exposures (8 hour-time weighted averages, TWA) to airborne methylene chloride during cleaning molds using rags wetted with the solvent in the manufacture of flexible polyurethane foam (GM = 61.4 ppm), during operating the dip tank for cleaning molds in the manufacture of lens (GM = 61.0 ppm), and during cleaning the blowing nozzles by spraying the solvent in the manufacture of shoes (GM = 117.2 ppm) were exceeded the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV^ⓡ)-Time Weighted Average (TWA) (50 ppm). The COHb levels were significantly different among groups (p$lt;0.05). The average COHh levels in blood of non-smoking workers were 2.0% in. low-level ($lt;50 ppm) exposure group, and 3.9 % in high-level ($gt;50ppm) exposure group. The average COHb levels in smoking workers were 3.1% in low-level exposure group, and 4.8% in high-level exposure group. The blood COHb levels of no-exposed workers to methylene chloride were 1.8% in non-smoking group, and 2.8% in smoking group. It was found that the COHb level dependeds on the methylene chloride concentration and smoking habit, and was highly correlated with methylene chloride concentration in air. The correlation coefficient was 0.81 among non-smoking workers. The estimated COHb level (3.6%) and 95% upper confidence limit (4.0%) corresponding to TLV-TWA of methylene chloride exceeded the current ACGIH Biological Exposure Index (COHb 3.5%) for carbon monoxide. The estimated COHb level (5.4%) at 100 ppm exceeded the standard (5%) recommended by National Institute for Occupational Safety and Health (NIOSH) for preventing adverse cardiovascular effect. The estimated COHb value and 95% upper confidence limit at 25 ppm of the Occupational Safety and Health. Adminstration (OSHA) Permissible Exposure Limit-TWA (PEL-TWA) were 2.6% and 3.0%, respectively. It is suggested that COHb in blood be kept below 3.0% to comply with OSHA PEL-TWA.

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