• 한국측량학회지
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• 제14권2호
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• pp.229-239
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• 1996

교통기관으로서의 역할을 충분히 수행하기 위해서 철도속도향상을 통한 운행시간 단축은 인간의 생활양식 고급화 및 시간가치의 증대로 인해 절실히 요구되는 사항으로 부각되고 있다. 특히 열차운행속도에 매우 큰 영향을 주는 선형 요소는 곡선구간으로서, 우리나라의 경우 곡선구간이 많은 비율을 차지하고 있어 이 구간에서의 속도향상은 전체구간의 운행시간을 단축시킬 수 있기 때문에 우리나라의 선형에 대한 특성을 고려하여 곡선부 전체구간에 걸쳐서는 선형을 지배하고 있는 요소의 개량 및 부분적 개량방법으로 사용되는 완화곡선 연장기법을 각 단계에 걸쳐 주행안정성 및 승차감의 지표로서 이용하고 있는 횡가속도 값을 적용하여 속도향상를 통한 운행시간 단축효과를 얻었다. 이 결과 우리나라 선형조건상 곡선부 전구간을 개량하는 것이 운행시간을 단축하기 위해서는 완화곡선의 연장 방법 보다 효과적임을 나타내고 있다.

• 한국자동차공학회논문집
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• 제5권3호
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• pp.117-127
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• 1997

To maintain the reasonable temperature in the engine is very important to keep the steady combustion state of engine and to prevent increasing of lubricant consump- tion, deteriorating of lubricant, shortening of the life time of engine and decreasing of material strength. The method of energy balance for devided elements of radiator is considered to analyse the performance of radiator. Th data of engine test and vehicle cooling tunnel test are applied to program for calculation of radiator outlet temperature, and this result is compared with outlet temperature of vehicle cooling tunnel test. As a result, the radiator outlet temperature by numerical analysis agrees well with that by experiment. It is concluded that this simulation program is available in developing the cooling system for a new car.

• 가정과삶의질연구
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• 제16권1호
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• pp.125-139
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• 1998

This study investigates work loads and coping strategies of the married female production workers(MFPW). The data of 370 MFPW in manufacturing sector in Taegu are collected by using a questionare in August 1995 The findings of this study are as follow: 1) The results of objective work loads assessed time dairy show that the average working hours is 14.25 hours during weekdays. The respondents spend 11.5 hours and 2.75 hours on doing paid and household work respectively,. The shortage of phisiological and leisure time due to spending excessively long time on work. 2) MFPW perceive the severe subjective work loads in the areas of personal family and social life. The perceived burden from paid work itself is relatively low due to the nature of their job. 3) The coping strategies MFPW actually adopted are limited mostly to those from an individual domain such as shortening the time for sleep leisure or household labor.

• 한국건축시공학회지
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• 제18권6호
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• pp.603-609
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• 2018

우리나라의 경제성장 수준에 비하여 삶의 질 수준은 낮은 것으로 알려져 있다. 특히, 건축공사 현장관리자들은 건설업의 특성상 이른 출근시간과 적은 휴일로 인하여 타 직종과 비교하였을 때 삶의 질 수준이 낮은 것으로 나타났다. 본 연구는 건축공사 현장관리자의 워라밸 향상에 대한 요구사항을 분석하는 것을 목적으로 하였다. 이를 위해 설문조사를 통해 현장관리자의 근로실태와 워라밸을 분석하였다. 연구 결과, 건축공사 현장관리자들의 근로시간은 길고, 여가시간은 짧은 것으로 나타났다. 워라밸 향상에 대한 요구사항은 여가시간, 근로시간, 임금, 직업안정성 순으로 높게 나타났다. 집단별 요구사항의 차이는 '과장, 차장' 직급에서 근로시간 단축에 대한 요구가 가장 높게 나타났고, '부장 이상' 에서 가장 낮게 나타났다. 본 연구결과는 건설현장관리자들의 워라밸 향상을 위한 정부나 건설회사의 정책방향 설정을 위한 기초자료로 활용될 수 있을 것으로 기대된다.

• 한국식품조리과학회지
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• 제29권4호
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• pp.425-437
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• 2013

This study conducted a questionnaire survey of the current use status of central kitchen products on 198 dietitians and cooks working at a catering center of a company affiliated with group S in order to investigate the use state of the central kitchen products in catering. The largest groups of respondents answered that they use the central kitchen products once two to four days. As a reason to use it, the largest group answered that they used it because of the ease of preparation. In addition, the results show that the subjects often use sauce and processed vegetables among the central kitchen products. This study investigated the efficiency of cooking, hygiene and safety management of the central kitchen products. The results show that they have a large effect on shortening the cooking time. The quality control and service efficiency of the central kitchen products showed a positive reaction to the menu diversification and excellent quality but a negative reaction to the nutritious superiority. The operating cost efficiency of the central kitchen products generally showed a negative reaction except for the reducing effect of waste rate. As an improvement of the central kitchen products, the survey shows that the reduction in price and quality progress should be most urgently improved. Based on these results, the introduction of the central kitchen products into to the catering enables to standardize mass production, improve the taste and quality, cook without professional chefs and produce productivity increasing effect in the catering by the time shortening effect.

• 대한가정학회지
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• 제8권1호
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• pp.62-86
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• 1970

A study on the upper garment of Korean women, JUORI The upper garment of Korean women. JUGORI, is an inherited mode from the ancient clothing style in the various aspects based on the particulars of Korean clothes. The ancient style of clothes is originated from KWAMDUI belonging to inhabitants of Northern Territory of Korea. And it is quite different from Chinese clothes in lineage. However, this unicque mode of clothes has been much influnced by the Chinese culture and also by the climate of Korea. And it is quite different from Chinese clothes in lineage. However, this unicque mode of clothes has been much influnced by the Chinese culture and also by the climate of Korean penynsula. The changes of the pattern of JUGORI, in a word, is a sign of shortening tendency of size. This tendency of JUGORI is remarkably seen in the shortening of length and other parts are decreased in size. The JUGORI in the ancient age was fallen below the weist of woman, which is similar to Robe, and was worn with band. However, the length of the JUGORI has been gradually shortened, and therefore, GORUM took place of the band. The shortening tendency of JUGORI is seemed to be shown its sign in the initial time of its origin, because there are some evidences that the women in Sylla Dynasty, and this tendency has been much expedited during the period of Koryu Dynasty with influences of Monggorian culture (Won Lynasty of China) The oldest sample for data of JUGORI in nowaday is one the remains of Yi Dynasty, and this sample for data provides all the particulars of the modern pattern of JUGORI. The tendency of JUGORI had been continued even in Yi Dynasty, and at the end of the Dynasty, the clothes was shortened that the women felt inconvenient wearing it in the status of the shortened JUGORI which was even hardly cover the initial time of epoch of modernization induced from the Western civilization, and after 1920s and 1930s JUGORI become a larger tendency. This is a sing of revival of practical use and rationalization of JUGORI become a shortening tendency again, and the size is similar with that of early age of Yi Dynasty. Instead of these similarities, the particulars of modern JUGORI is weighing on much emphasis on curve beauty and expression of experior beauty. The reason is that, together with westernization of clothes, JUGORI became a special pattern of clothes as a traditional Korean women wears. The very thing explaining this pattern of JUGORI is the "ARIRANG DRESS". And there are some fashion using button instead of GORUM and half sleeve JUGORI for summer use which is regarded as a part of improved aspect of life in Korea. in Korea.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 동계학술발표대회 논문집
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• pp.481-486
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• 2008

The building HVAC systems have very different qualities of performance and durability with the superintendent's ability for management and maintenance. The poor management of these systems finally lead to the shortening of the life expectancy and result in the increase of operating costs and energy consumptions due to low efficiencies. So it is essential to try to develop ways to adequately maintain and to use the building facilities efficiently in order to preserve earth environment and the limited resource. In this study, the LCC based numerical calculation package will be developed for the efficient maintenance plan and the determination of the reasonable time of repair or replacement of equipments.

• 한국정밀공학회지
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• 제15권9호
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• pp.25-32
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• 1998

The forced cooling system is designed to shorten the overhaul time of steam turbine, which is important in view of economic concern of utility companies, Forced cooling of the hot turbine is achieved by suction of air flow into the turbine after the turbine shuts down. The heat transfer process by suction of air flow can cause thermal stress due to the thermal gradients. In this paper, the analysis of heat transfer is performed to calculate the air flow rate. Based on the prediction of cyclic fatigue damage and the experience, the cooling equipment is designed for shortening the cooling time of steam turbine.

• Journal of Radiation Protection and Research
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• 제9권2호
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• pp.67-75
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• 1984

As a part of studies on acute effects of high dose irradiation the present report was carried out to evaluate the changes of the leukocyte life span in the Newzealand white male rabbits by a single whole body exposure to gamma rays from $^{60}Co$ teleirradiation unit. The exposure was done in dose levels of 100, 300, 550 and 1,000 rad to each experimental group of 10 rabbits. The life span and apparent half survival time of leukocytes, and the elution rate of leukocytes in the circulating blood were measured by McMillan method using $^{51}Cr$. 1. As a critical indicator of radiation hazards of the Newzealand male rabbits, the LD 50/30 and LD 100/30 after whole body exposure was estimated as 550 and 1,000 rads respectively. 2. The life span of leukocyte in the circulation after irradiation was slightly shortened in the 100 rad irradiated group, as compared with the unirradiated control group, but markedly shortened in the 300, 550 and 1,000 rads irradiated group. 3. After irradiation, decrease of leukocyte half survival time in the circulation showed the same pattern as that of leukocytes life span. 4. As the irradiation doses increased, the elution rate of $^{51}Cr$ loss from $^{51}Cr$ tagged leukocytes in the circulation were markedly increased gradually. 5. The life span shortening of leukocytes in the circulation after irradiation seems to occure by two processes of senescence acceleration and early destruction.

• 설비공학논문집
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• 제21권9호
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• pp.513-518
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• 2009

The building HVAC systems generally have very different qualities of performance and durability with the superintendent's interest in or capability of management and maintenance of them. The poor management of these systems finally lead to the shortening of the life expectancy and result in the increase of operating cost and energy consumption due to their low efficiencies. So it is necessary to develop tools to maintain adequately and to operate efficiently various building service equipments in order to cope with actively the global environment problems and energy crises. In this study the LCC based calculation program and package were developed, which could be used for analyses of the economic performance and determination of the reasonable maintenance time and methods of building HVAC systems.