• Proceedings of the Safety Management and Science Conference
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• 2008.04a
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• pp.301-314
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• 2008

미국 센서스 뷰로 데이터에 의하여 2차대전 후 민주당정부와 공화당정부의 실질 세전 소득증가율의 차이를 살펴볼 때 민주당정부 기간동안에 계층간의 소득불균형이 시정되면서 저소득계층의 소득증가율이 상대적으로 더 높았음을 알 수 있다. 반면에 공화당정부 기간동안에는 소득불균형이 심화되면서 저소득계층보다 고소득계층의 소득증가율이 더 높았다. 소득계층에서 하위 20%의 계층은 공화당정부의 기간동안에 비하여 민주당정부의 기간에 4배의 높은 소득증가율을 가졌다. 이는 양 정부별 실업률 차이에서 비롯되는 데 민주당정부의 기간 동안에 평균 30% 낮았으며 GDP성장률은 평균 30% 높았음에도 영향을 받은 것으로 판단된다. 이러한 정부별 차이는 1980년대 이후 세후 소득증가율에서도 나타나고 있다. 한편, 실증분석 결과에 따르면 한국의 경우 미국에서와 같이 저소득계층이 고소득계층 보다 거시경제정책에 따른 영향을 더 많이 받고 있음을 알 수 있었으며, 특히 신정부에서는 이전보다 적극적인 통화정책을 적절한 타이밍(timing)으로 실시하여야 할 필요성이 나타났다.

• Proceedings of the Safety Management and Science Conference
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• 2008.04a
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• pp.315-331
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• 2008

미국 센서스 뷰로 데이터에 의하여 2차대전 후 민주당정부와 공화당정부의 실질 세전 소득증가율의 차이를 살펴볼 때 민주당정부 기간동안에 계층간의 소득불균형이 시정되면서 저소득계층의 소득증가율이 상대적으로 더 높았음을 알 수 있다. 반면에 공화당정부 기간동안에는 소득불균형이 심화되면서 저소득계층보다 고소득계층의 소득증가율이 더 높았다. 소득계층에서 하위 20%의 계층은 공화당정부의 기간동안에 비하여 민주당정부의 기간에 4배의 높은 소득증가율을 가졌다. 이는 양 정부별 실업률 차이에서 비롯되는 데 민주당정부의 기간 동안에 평균 30% 낮았으며 GDP성장률은 평균 30% 높았음에도 영향을 받은 것으로 판단된다. 이러한 정부별 차이는 1980년대 이후 세후 소득증가율에서도 나타나고 있다. 한편, 실증분석 결과에 따르면 한국의 경우 미국에서와 같이 저소득계층이 고소득계층 보다 거시경제정책에 따른 영향을 더 많이 받고 있음을 알 수 있었으며, 특히 신정부에서는 이전보다 적극적인 통화정책을 적절한 타이밍(timing)으로 실시하여야 할 필요성이 나타났다.

• Proceedings of the Safety Management and Science Conference
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• 2008.04a
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• pp.477-487
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• 2008

미국 센서스 뷰로 데이터에 의하여 2차대전 후 민주당정부와 공화당정부의 실질 세전 소득증가율의 차이를 살펴볼 때 민주당정부 기간동안에 계층간의 소득불균형이 시정되면서 저소득계층의 소득증가율이 상대적으로 더 높았음을 알 수 있다. 반면에 공화당정부 기간동안에는 소득불균형이 심화되면서 저소득계층보다 고소득계층의 소득증가율이 더 높았다. 소득계층에서 하위 20%의 계층은 공화당정부의 기간동안에 비하여 민주당정부의 기간에 4배의 높은 소득증가율을 가졌다. 이는 양 정부별 실업률 차이에서 비롯되는 데 민주당정부의 기간 동안에 평균 30% 낮았으며 GDP성장률은 평균 30% 높았음에도 영향을 받은 것으로 판단된다. 이러한 정부별 차이는 1980년대 이후 세후 소득증가율에서도 나타나고 있다. 한편, 실증분석 결과에 따르면 한국의 경우 미국에서와 같이 저소득계층이 고소득계층 보다 거시경제정책에 따른 영향을 더 많이 받고 있음을 알 수 있었으며, 특히 신정부에서는 이전보다 적극적인 통화정책을 적절한 타이밍(timing)으로 실시하여야 할 필요성이 나타났다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.11
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• pp.1618-1625
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• 1993

In the transmission of image using the lossless Laplacian pyramid coding, the image quality of the last hierachy is almost same regardless of the bit rate of each hierachy. However, at the higher hierachy with low resolution, it is varied according to bit rate of each hierachy. In this paper, optimum bit allocation to achieve better image at the higher hierachy and minimize the distortion at the last hierachy was proposed. More efficient progressive transmission was shown to be possible by experimental results of higher PSNR and better image quality at the hierachy with low resolution.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.1
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• pp.90-98
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• 2017

Since 2010, SNS was holding the explosive spread of smartphones has created a place of public advertising platform, and it entered the Internet of Things (IoT) is born gradually countdown of the era came to us already. In utilizing a variety of location-based services IoT services (beacon, O2O) The focus of this paper to analyze the differences in satisfaction with the oil layer by experienced users of what is being used. We consider the type and overall utilization of the concepts typical IoT service in the current service is made to expand the contents of the paper. Hypothesis was reconstructed ease, attractiveness, a survey reliability, value four kinds of models, called Honeycomb UX, User Experience Honeycomp Peter Mobil. Company that provides the service IoT in this study are expected to be used as basic data to help provide a more accurate personalized service according to the user's satisfaction difference.

• Communications for Statistical Applications and Methods
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• v.16 no.2
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• pp.217-228
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• 2009

In this paper, we consider a multi-class queueing system in which different classes of customers have different arrival rates, service rates and class-transition probabilities. We use the fast simulation method to estimate the overflow probability and the expected number of customers of each class at the first time the total number of customers hits a high level. We also discuss the overflow probabilities and the expected number of customers at different loads, respectively.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.4
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• pp.346-355
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• 2020

The purpose of this study was to suggest measures to improve safety and health training by analyzing trainees who participated in the training programs. A survey was administered to 226 trainees who participated in and completed the safety and health training programs provided by the Korea Occupational Safety and Health Agency. The study results showed that the level of satisfaction of employers for the training programs was the lowest compared to the middle managers and employees. Moreover, the middle managers' job competencies were increased, and they applied newly acquired knowledge and skills to their jobs. However, there were significant differences between industries. Finally, although all levels of trainee agreed on the effectiveness of safety and health training, the perceptions of employers were lower than those of employees. Based on these study results, several implications to improve the safety and health training were suggested.

• 한국사회복지학회:학술대회논문집
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• 2005.10a
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• pp.337-342
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• 2005

• Progress in Medical Physics
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• v.9 no.2
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• pp.115-121
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• 1998

In this paper, basic study of diagnostic device development for early detection of cancer, we present the optical property measurements of 12 histologically classified biological tissue and blood specimens in order to determine whether significant optical contrast exists for detection of disease(cancer). In vitro, optical properties of each 630nm, 660nm, 780n, 880nm and 940nm shows consistent changes in effective absorbtion coefficients, ${\mu}$$\_$${\alpha}$/ with tissue classification of pig an chicken and human blood according to the 27.3%, 35.4%, 45.6% and 59.1% of HCT. We found differences in optical properties at each of specific wavelengths and histologically classified biological tissue.

• 한국사회정책
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• v.25 no.2
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• pp.281-304
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• 2018

This paper aims at analysing what impacts the experience of self-employed business have had on the income mobility. Since 2000s, the flexibilization of labor market and the population aging led to the increase of the number of self-employed job as many retirees at the age of early 50s has set up the self-employed business as a bridge job. However, previous researches just have emphasized on the impoverishment of the self-employed, but not focused on what different effects the experience of self-employed had on the income class mobility by age group. This paper compares the difference in the income class mobility by age group and employment status, and analyses its longitudinal trends. According to the result, as a whole the experience of self-employed has positive effect on the upper mobility of income class, but it become disadvantageous for the upper mobility as the age goes up. When belonging to the age group over 60s, the experience of self-employed rather increases the risk of lowering income class. Just as the experience of self-employed has different effects on income class mobility by age group, so the differentiated measures for age groups are demanded.