• 한국정보통신학회논문지
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• 제13권9호
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• pp.1837-1844
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• 2009

본 논문에서는 전류모드 CMOS에 의한 2변수 3치 가산기 회로와 승산기 회로를 구현하였다. 제시된 전류모드 CMOS에 의한 3치 가산기 회로와 승산기 회로는 전압 레벨로 동작하며, HSpice 시뮬레이션을 통하여 이 회로들에 대하여 동작 특성을 보였다. 제시 된 회로들은 $0.180{\mu}m$ CMOS 표준 기술을 사용하여 HSpice로 시뮬레이션 하였다. 2 변수 3치 가산기 및 승산기 회로의 단위 전류 $I_u$는 $5{\mu}A$로 하였으며, NMOS의 길이와 폭 W/L는 $0.54{\mu}m/0.18{\mu}m$이고, PMOS의 길이와 폭 W/L는 $1.08{\mu}m/0.18{\mu}m$이다. VDD 전압은 2.5V를 사용하였으며 MOS 모델은 LEVEL 47으로 시뮬레이션 하였다. 전류모드 CMOS 3치 가산기 및 승산기 회로의 시뮬레이션 결과에서 전달 지연 시간이 $1.2{\mu}s$이며, 3치 가산기 및 승산기 회로가 안정하게 동작하여 출력 신호를 얻는 동작 속도가 300MHz, 소비 전력이 1.08mW임을 보였다.

• 한국산업보건학회지
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• 제23권2호
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• pp.108-113
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• 2013

Objectives: Although several cases of lung diseases caused by indium have been reported in Japan, the United States and China, South Korea, which is estimated to have been the world's largest consumer of indium, has not yet established a criteria for the diagnosis of lung diseases caused by indium exposure. In this study, we tried to determine the applicability of the Krebs von den lungen-6, which has been widely recognized for its use with interstitial lung disease in Japan, as a biological exposure index for indium. Methods: Methods: The analysis of indium in serum was conducted by inductively coupled plasma mass spectrometry and the analysis of KL-6 in serum was carried out using enzyme-linked immunosorbent assay kit. Results: The indium levels in serum were distributed from below the detection limit to a peak of $125.78{\mu}g/L$, and the values of the KL-6 were distributed from 104.5 U/mL to 2162.2 U/mL. The serum indium and KL-6 showed good correlation ($R^2$=0.389,pfortrend=0.000) and smoking did not affect the KL-6. Conclusions: The usefulness of KL-6 as a specific biomarker for interstitial lung disease has been recognized. In addition, it is expected that effective prevention of health problems can be achieved by determining the lung-damage progress at an early stage according to individual susceptibility.

• Toxicological Research
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• 제28권3호
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• pp.143-149
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• 2012

To prepare measures for practical policy utilization and the control of heavy metals, hazard control related institutions by country, present states of control by country, and present states of control by heavy metals were examined. Hazard control cases by heavy metals in various countries were compared and analyzed. In certain countries (e.g., the U.S., the U.K., and Japan), hazardous substances found in foods (e.g., arsenic, lead, cadmium, and mercury) are controlled. In addition, the Joint FAO/WHO Expert Committee on Food Additives (JECFA) recommends calculating the provisional tolerable weekly intake (PTWI) of individual heavy metals instead of the acceptable daily intake (ADI) to compare their pollution levels considering their toxicity accumulated in the human body. In Korea, exposure assessments have been conducted, and in other countries, hazardous substances are controlled by various governing bodies. As such, in Korea and other countries, diverse food heavy metal monitoring and human body exposure assessments are conducted, and reducing measures are prepared accordingly. To reduce the danger of hazardous substances, many countries provide leaflets and guidelines, develop hazardous heavy metal intake recommendations, and take necessary actions. Hazard control case analyses can assist in securing consumer safety by establishing systematic and reliable hazard control methods.

• 한국산업정보학회논문지
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• 제27권2호
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• pp.83-100
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• 2022

마케팅분야에서는 제품 상징주의를 지닌 쾌락적 소비에 관한 주제와 관련된 개념적 연구는 상징적 소비주의와 쾌락적 경험연구에 공헌하였다. 예상치 못한 소득이나 일시적 이득에 대한 기대를 소비자가 어떻게 다루는가를 연구하는 것은 그들이 경험을 즐기는데 무엇이 영향을 미치는 가를 이해하는데 도움을 줄 것이다. 이 논문은 쾌락적 소비와 실용적 소비의 상반관계를 논의한다. 일시소득이 발생한 상황에서 언제 왜 소비자들이 쾌락적 혹은 실용적 제품을 선택하는 가를 알아보는 것이 목적이다. 우리는 5개의 가설을 제시하고 일련의 실험을 통해 복권금액이 증가할 때 응답자들은 실용제품보다 쾌락제품을 선호하고, 취득확률은 두 제품간 차이가 없고, 선호순위도 차별화되지 않았다. 일시소득이 증가할 때 두 제품간의 선호그래프는 반대로 나타났다. 할인율이 변할 때 소비자의 선호순서는 변활 것으로 예상된다. 응답자들은 쾌락제품을 가장 선호하고, 실용제품, 할인 현금 순으로 선택하였다. 따라서 소비자의 쾌락주의와 쾌락적 경험에 대한 환상을 자극하는 것은 효과적인 마케팅 전략과 전술이 될 것이다.

• 마케팅과학연구
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• 제20권1호
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• pp.49-58
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• 2010

企业社会责任已经成为学者们进行研究的一个重要课题. 多数认为企业社会责任对企业去定义他们在社会中的责任是必要的, 并且为他们的商业活动提供社会和道德标准. 其结果是, 相当数量的零售商已经采用企业社会责任为一个战略工具来宣传他们的商业活动. 为此, 本研究企图探索美国消费者在他们对零售商主观的感知和评估的基础上在道德购买和消费中的态度和行为. 本文的目的包括: 1)测定参与者对零售商企业社会责任的认知度. 2)评定参与者如何评估零售商企业社会责任. 3)测定参与者对零售商企业社会责任的评估过程是否影响他们对零售商的态度. 4)评定参与者对零售商企业社会责任的态度是否影响他们的购买行为. 本文并没有关注实际的零售商企业社会责任表现. 因为消费者的决定过程是基于个体的评定而不是实际的事实. 本研究调查了美国大学生对零售商企业社会责任的认知和评估. 本研究的参与者是56名来自美国东南大学的大学生. 他们的年龄在18岁到26岁之间. 使用开放性译码和选择性译码进行内容分析. 我们收集和分析了超过100张单倍行距的答复. 使用两步骤的译码(即开放性译码和选择性译码. 译码结果和分析笔记用来理解参与者对企业社会责任的认知和从书写的回复中提炼出来包括直接引用的答案所支持的伦理购买行为. 为保护参与者隐私, 这里使用的都是化名. 参与者被要求写下有关零售商, 他们对企业社会责任问题的认识和评估一个零售商的企业社会责任表现. 大部分应答者(n=28)表明他们对企业社会责任有一定的认识但是不觉得需要按这个要求去做. 少数应答者(n=8)表明他们对企业社会责任有一定的认识但是基本不关心. 结果表明当大学生评估零售商的几页社会责任表现时, 他们使用企业社会责任的三个纬度: 员工支持, 社区支持和环境支持. 我们发现如何对待和支持员工是一个评估零售商的企业社会责任的重要准则. 应答者表明作为一个员工和零售商有好的经历会使他们对此零售商有积极的感知和态度. 和员工支持相关的有四个主题: 根据员工表现的奖励和惩罚, 工作环境, 员工教育和训练课程, 以及员工和员工家人折扣. 良好的赏罚机制被认为是一个重要的属性. 和工作环境相关的因素包括: 零售商如何良好的遵守与工作时间相关的规则, 午餐时间和休息同样被认为是重要的属性之一. 有关社区支持, 有三个方面: 对当地社区销售比率的贡献, 对慈善组织的财政贡献和对社区大型活动的支持. 在环境方面, 有两个主题: 循环利用和销售有机或绿色产品. 在回复中有提到, 零售商正在尝试去做对环境友好所能做的. 一位应答者提到这个公司正在创造有环保设计的店铺. 并且能在这家公司的网站上轻松的找到为帮助环境所做的事情的信息. 应答者还注意到这些店铺可提供有机和亲环境产品. 应答者在此类中还提到关于这个公司如何使用环保的杯子和他们如何帮助新奥尔良的居民重建家园. 应答者注意到零售商为购买产品的消费者提供可再使用的袋子. 一位应答者说一家零售商通过提供有机棉来使他们的产品帮助环境. 在分析应答者之后, 我们发现参与者对零售商的企业社会责任的评估影响他们对零售商的态度. 然而, 在态度和购买行为之间有显著的差异. 尽管参与者对零售商的企业社会责任有积极的态度, 但资金和时间的缺乏也影响他们的购买行为. 总体来看, 一半的应答者(n=28)提到在购物时企业社会责任表现影响他们的购买决定. 本研究的结果为零售商针对消费者提高他们的形象而考虑企业社会责任提供了支持. 本研究暗示出消费者根据员工, 社区和环境三方面的支持来评估零售商. 评估, 态度和购买行为似乎是密切相关的. 也就是说, 评估是基于消费者对零售商企业社会责任的认识. 这些认识可以影响他们对零售商的态度从而进一步影响他们的购买行为. 参与者同时表明企业社会责任会使他们对零售商印象良好但是并不会影响他们的购买行为. 在参与者中, 价格和便利似乎超越了企业社会责任的重要性. 本文还讨论了此研究的启示, 对未来研究的建议和研究的局限.

• 한국실내디자인학회논문집
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• 제14권2호
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• pp.135-141
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• 2005

Subsequent to major changes in workplace such as communication method, uncertain organizational environment, and globalizaiton, several studies in workplace have explored the effects of those changes on work outcomes. Especially, employees need to have the balance in working alone and working with others. The purpose of this study is to examine the effects of control over the physical environment by individuals and the effects of flexibility on individual and group work outcomes in the workplace, to examine the effects of distraction on work outcomes, and to suggest a interrelationships among variables. In this study, four hundred and nine questionnaires were collected from employees of three manufacturing corporations in Michigan, U. S. In order to explore the causal interferences among multiple relationships suggested in this study, path analysis was employed using Lisrel 8.54. The results indicated that control over the physical environmental features of the workplace positively influenced job satisfaction. The findings also supported the hypothesis that flexibility is positively related to task group cohesiveness. It was found that distraction was negatively associated with control and flexibility. However, it was not supported that control was positively associated with perceived performance. This study found control and flexibility in the workplace to be important. Some practical implications were suggested emphasizing that control and flexibility allow limited resources to be used in ways that permit individuals to work effectively within a changing work environment.

• 무역상무연구
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• 제15권
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• pp.211-238
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• 2001

This article discusses and analyses several issues regarding to the Electronic Signature and the Electronic Certification. The objects of the analyse are the each paragraphs of the Korean Electronic Signature Act of 1999 and that of the Korean Electronic Transaction Basic Act of 1999 in comparing to the paragraphs of the Electronic Signatures in Global and National Commerce Act' (E-Sign) of 2000, U.S.A. and that of the Draft UNCITRAL Model Law on Electronic Signature of 2000. The main issues discussed herein are the scope of the electronic signature, the definition of the electronic signature, permission of services to the non-authorized certification service providers, the effect of the electronic signature, the liability of the concerning parties of the electronic signature including liability of the certification service providers, that of the subscribers and that of the relying parties. This paper also discusses the problems of the possibility of issuing the electronic negotiable commercial papers, the validity of the electronic signatures done by electronic agents, the authority certificate, mutual certification of the foreign certification service providers, the permission of the electronic notary service, the problems of the consumer protection and the possibility of issuing electronic insurance policy, etc. The writer concludes by suggesting some measures that will activate the use of electronic signatures under the korean circumstances.

• 가정과삶의질연구
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• 제11권1호
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• pp.107-118
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• 1993

A dimension of well-being economic security was analyzed and compared with economic adequacy. Again it was tested whether two indicators of economic security(short-term vs. long-term) yield same distribution across all household groups. Economic Security was defined as the household ability to sustain a given level of consumption in the case of economic emergency; specifically loss of income. Measure of 8 different kinds of economic security were constructed from household net worth including and excluding home equity. Data were taken from the 1988 U.S. Consumer Expenditure Survey and 2148 households were selected to test hypotheses concerning the economic security of American households Empirical results showed a very low level of economic security in general. The first hypothesis that distribution of economic adequacy and economic security are same across all population groups was rejected. On the average security measure rather than adequacy measure was favor to white female-headed households and households who have old and highly educated house-holder. The second hypothesis that the indicators of long-term and short-term economic security yield the same results across all household was not rejected. In general the level of economic security was relatively higher when long-term indicator was used than short-term indicator was however the direction and relative size of effect of income and each control variable was almost same.

• 대한가정학회지
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• 제44권5호
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• pp.129-142
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• 2006

The purpose of this research was to find the solution of problems originated from financial illiteracy. To accomplish this task, the content which supposed to be taught in the area of personal finance in the Elementary, Middle and High School curricular were identified based on the previous research. Then, the personal finance content taught in public education system were analyzed rising content analysis of over 100 text books related to Personal finance education, such as Home Economics, Social Science, Economics, and Human Life Sciences, etc. Based on the results, followings were concluded. In spite of the fact that only few personal financial education topics were included in the 7th Education Curriculum, many topics taught in the subject of Social Science were duplicated in the Home Economics Curricular. To accomplish the ultimate goal of personal financial education, an introduction of the new course(Personal Finance) in the regular curriculum like U.S. is strongly recommended.

• International Journal of Human Ecology
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• 제16권1호
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• pp.11-23
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• 2015

Although Korean international students/scholars are among the largest groups of international students/scholars on most campuses in the United States, little is known about what types of demands their families face and how they adapt successfully in the face of demands. The purpose of this study was to explore family resilience, which consists of family demands, capabilities, and adaptation, perceived by Korean international student/scholar families, being theoretically guided by the Family Adjustment and Adaptation Response (FAAR) model. Data were collected through face-to-face interviews with couple informants. Following procedures of theory-based content analysis, data were analyzed using key FAAR concepts. Findings showed that most informants reported normative types of family demands such as hardships due to childcare; primary family capabilities were "maintaining social integration," "affective and instrumental communication," and "family cohesiveness," and "nurturance, education, and socialization" was the primary family adaptation mode. New categories under family capabilities, "religious commitment" and "transnational family support" were developed. The results suggest that there is a unique set of family capabilities that contribute to the successful adaptation of Korean international student/scholar families. Implications and limitations are discussed.