• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 C
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• pp.1673-1674
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• 2006

The most ideal light source known to the mankind is sunlight. Therefore, whenever an artificial light source is needed in a dark place such as in a shadowed houses, the utmost goal is to find an artificial light characteristics of which approaches that of sunlight. On this ground, we have investigated a Neodymium lamp as a possible substitute for sunlight. Especially, the local and the color rendering, a life expectancy, and the overall efficiency are carefully studied.

• Korean Journal of Health Education and Promotion
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• 제1권1호
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• pp.95-117
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• 1999

As the nation is moving into the 21st century, the fundamental challenge facing local health departments in the United States is to improve the quality of peoples lives by preventing disease, injury, and disability through collaboration with public and private partners. During this century, life expectancy in the United States has increased remarkably from less than 50 years at the turn of the century to 79 years for woman and 72 years for men (CDC 1999; Bunker et al. 1994). Major portions of this gain can be attributed to advances in public health. (omitted)

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권2호
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• pp.789-806
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• 2020

The 4^th Industrial Revolution (FIR) has already begun. Corporations have to fulfill their social responsibilities to the FIR. This study explores the leadership and attitudes required in the FIR era for companies to fulfill their social responsibilities. In the FIR era, workers should have certain attitudes, such as self-efficacy, expectancy, and acceptance of change. If workers have these attitudes, they will be able to make a difference in the future. This study suggests the leadership styles that are needed to improve these attitudes. Participation, creativity, delegation of leadership, and inspirational motivation of leaders involves organizational change and improvement of organizational performance. This paper demonstrates the kind of leadership that is more important for each attitude through statistical analysis. Furthermore, when workers have these attitudes, not only the future, but also their current performance can be improved. To explain this relationship, the paper describes the effect of attitudes on job satisfaction. If workers have certain attitudes, their current and future performance will improve. As a result of the research, all four leadership styles had positive effects on attitudes toward FIR, and attitudes showed a mediating effect on the relationship between leadership styles and job satisfaction. In addition, it has been proven that the role of participative and delegating leadership, which is more member-oriented leadership, is more important. Leadership will enable workers to have a particular attitude through member-centered leadership, and workers will be able to increase current and future performance. Through these efforts, companies will be able to increase their performance in the current and FIR era, and fulfill their social responsibilities more faithfully. Therefore, in the FIR era, companies will play an important role in the development of society, and create new values.

• 센서학회지
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• 제21권4호
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• pp.241-248
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• 2012

Recently healthcare industry such as pharmaceutical, medical device and healthcare service technology is growing significantly. Mobile healthcare has attracted big attention due to IT convergence technology. Paradigm of healthcare has been changed from the 1st generation(communicable disease prevention) and the 2nd generation(treatment of disease due to extended life expectancy) to the 3rd generation(extended life expectancy due to prevention and control). In our study, we suggest the 3rd generation mobile healthcare system using Bluetooth based wearable ECG monitoring system and smart phone technology. The mobile healthcare system consists of wearable shirts with Bluetooth communication module, ECG sensor, battery, and mobile phone. The ECG data is obtained by a miniaturized sensor and the data is transferred to a mobile phone using Bluetooth communication. Then, user can monitor his/her own ECG signal on an application using Android in mobile phone. The Bluetooth communication device is used due to highly reliable data transmission property and the Bluetooth chip is embedded in every mobile phone. The wearable shirts with chest belt of Bluetooth ECG module is designed with a focus on convenience in the daily life of a wearer. The ECG signal evaluation software in Android based mobile phone is developed for the health check and the ECG signal variation is tested according to the activities of the wearer such as walking, climbing stairs, stand up and sit down, and so on.

• 대한근관절건강학회:학술대회논문집
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• 대한근관절건강학회 1996년도 제4회 춘계학술대회
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• pp.110-121
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• 1996

It is well defined that osteoporosis is an age related disorder and associated with decreased bone mass. It is one of the most important disease lacing the aging population because of its association with fracture of the hip, vertebrae and distal radius. The disease provoke a significant economic burden and major public health problem of an elderly. The life-time risk of hip fracture in white women is approximately 15% which is equal to the combined risk of breast, uterine, and ovarian cancer. Despite its deleterious effect on women's health, knowledge of the epidemiology of osteoporosis in Korea is only beginning. 1970 in Korea has non as the crossover period between the chronic and an Infectious diseases. As the result, the infant mortality declined and an elderly population in Korea increased significantly in the past decade, The average life expectancy of women in Korea is now about 75 years. Thus, the majority of Korean women will spend approximately one-third of their life in the postmenopause state. Therefore, better understanding of bone metabolism and fracture incidence in Korean population is a great interest for the medical community as well as for public health. Currently, no population based epidemiologic data are available to support the incidence of osteoporotic fractures in Korea. However, available data suggest that significant declining of bone mineral density (BMD [g/$cm^2$]) has been occurring in Korean women after menopause. In same population, peak BMD was observed around 33-39 years of age and continue to decline thereafter. An accelerated bone losses occur after the menopause and the average loss is approximately 13% within 15 years from the menopause. The incidence of fracture was highly correlated with an age and bone mineral density. The mean age of menopause in Korean women was 47 years and this age appears to getting younger when analyzed by the birth cohort. An earlier menopausal age and increase life expectancy place Korean women at increase risk for osteoporosis and bone fracture. Korean or Asian women are no longer protected from the risk of bone fracture. Therefore, an early prevention or intervention schemes are essential before the outbreak of osteoporosis and/or fracture occurs in Korean or Asian women.

• 한국경영정보학회:학술대회논문집
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• 한국경영정보학회 2007년도 International Conference
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• pp.545-550
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• 2007

The aim of this paper is to find out whether there is a difference in adopting and/or diffusing the information and communication technology (ICT) between countries. If there is, what are the primary factors that keep some countries from adopting and diffusing ICT while others do? To analyze the above problem, we adopted the Unified Theory of Acceptance and Use of Technology (UTAUT) suggested by Venkatesh et al. (2003), which consists of effort expectancy, performance expectancy and social influence. We also use the innovation diffusion functions, which are known to have the S-shape and are made up of the introduction, growth, maturity and decline phases. We do not, however, consider the decline phase, because the ICT that we are considering is not believed to be in that phase. Therefore, we researched how the three factors affect adoption in the three phases. We selected the cellular phone as the ICT, because it is considered to be the most popularly used ICT and its technology has been developing rapidly. We surveyed the cellular phone adopters in Korea, and the U.S. for 15 years from 1989 to 2003. Korea, and the U.S. represent newly developed and developed countries, respectively. For the data analysis, a survival analysis was used, as it could explain the characteristics of the potential adopters or non-adopters. We found that the ICT diffusion patterns, as well as the ICT diffusion factors, of the two countries were different. Therefore, we believe that the results of our research can be used in building strategies on reducing the digital divide gaps between countries.

• 한국조사연구학회지:조사연구
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• 제10권2호
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• pp.71-96
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• 2009

본 연구는 1980년대 이후부터 2000년대 초반까지 우리나라에서 이루어진 과거 인구추계의 정확성을 분석하였다. 인구추계의 정확성 평가대상으로는 총인구와 연령대별 인구뿐만 아니라 합계출산율과 기대수명과 같은 인구변동 요인들 또한 검토하였다. 총인구 예측의 정확성과 관련하여 전반적인 분석결과는 우리나라 과거 인구추계에서 정확성 향상의 뚜렷한 패턴이 관측되지 않음을 보여 주었다. 연령대별 예측의 경우 연소 인구와 노인 인구의 예측에서 상대적으로 큰 오차가 발생하였으며, 생산가능인구의 예측은 상대적으로 정확성이 높은 것으로 나타났다. 인구변동 요인들에 대한 예측의 경우 전반적으로 합계출산율은 과대 추정의 문제를 그리고 기대수명의 경우 과소 추정의 문제를 지속적으로 보였다. 분석 결과는 또한 인구변동 요인들 중 합계출산율 예측에서 발생한 오차가 기대수명 예측에서 발생한 오차에 비해 큰 것으로 나타남으로써 행동적 요소의 영향을 강하게 받는 변수의 경우 예측에 있어서 상대적으로 큰 어려움이 있음을 시사하고 있다.

• 한국의류학회지
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• 제38권4호
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• pp.455-466
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• 2014

This study examines the effectiveness of CSR through the expectancy disconfirmation theory. The change of CSR belief after a corporate social irresponsibility (CSIR) crisis was investigated in terms of activity timing (proactive activities before CSIR crisis/reactive activities after CSIR crisis). Study 1 explores the influence of CSR belief perceptions formed through usual CSR activities on CSR belief decline after a CSIR crisis and the moderating effect of CSR activity types. Higher CSR belief perceptions are formed through usual CSR activities that result in a large CSR belief decline. The moderating effect of CSR activity types on CSR belief decline is found. Volunteer activity has the strongest depending effect on CSIR crisis. Study 2 explores the influence of CSR belief perceptions formed through CSIR crisis on a CSR belief incline after CSR activities and the moderating effect of CSR activity types. The lower CSR belief perception after CSIR crisis results in a high CSR belief incline after CSR activities. The moderating effect of CSR activity types on CSR belief incline is found. Cause-related marketing has the strongest overcoming effect on a CSIR crisis.

• 한국신뢰성학회지:신뢰성응용연구
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• 제18권3호
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• pp.193-200
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• 2018

Purpose: In this study, the life of the motor is investigated by performing the accelerated life test with the brush wear of the industrial cleaner motor as the main failure mode. Methods: The accelerating stress factor of the accelerated life test is a voltage, which can increase the number of revolutions of the motor to accelerate the brush wear due to the friction between the brush and the commutator. Also, the accelerating stress level was determined after determining the maximum allowable level of the voltage through the preliminary test. Results: The motor failure time at each accelerating stress level was predicted by regression analysis with brush wear length as performance degradation data. The main failure mode, which is brush wear, of the motor was reproduced by this test. The shape parameter of the Weibull distribution was confirmed to be the same statistically at all accelerating stress levels by the likelihood ratio test. Conclusion: The life of the motor was investigated by performing the accelerated life test with the brush wear of the industrial cleaner motor as the main failure mode. Through the accelerating test method of the cleaner motor, various life expectancy and life expectancy of the acceleration factor are predicted.

• 한국콘텐츠학회논문지
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• 제15권4호
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• pp.122-138
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• 2015

본 연구는 신문사의 디지털 유료화 콘텐츠 수익 모델 중 하나인 통합형 플랫폼의 사용의도에 영향을 미치는 요인을 확장된 통합기술 수용모델을 기초로 고찰했다. 통합형 플랫폼이란 종이신문의 디지털 판형, 프리미엄 뉴스 혹은 비하인드 뉴스, 그리고 부가정보 등을 한 데 묶어서 서비스 하는 유료 콘텐츠 상품을 일컫는다. 연구 결과, 사용 편의성, 사회적 영향, 오락적 동기 그리고 신문 정기 구독 여부는 통합형 플랫폼 사용의도에 정(正)적인 영향을 미치는 것으로 분석됐다. 반면 종이신문에 대한 만족도는 통합형 플랫폼 사용의도에 부정적인 영향을 미치는 것으로 나타났다. 즉, 종이신문은 통합형 플랫폼과 대체 관계에 있는 것을 알 수 있었다. 한편, 고품질 기사에 대한 기대효과와 통합형 플랫폼 사용의도 간의 관계는 유의미하지 않았으며, 성별과 연령 그리고 뉴스 소비 습관과 언론사 홈페이지에 대한 만족도 역시 통합형 플랫폼 사용의도에 유의미한 영향을 미치지 않는 것으로 나타났다.