• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 춘계학술대회
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• pp.451-455
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• 2003

Major concern in modern industry is how to reduce the time and cost for product efficient production. Among many mechanical parts of a satellite, bracket plays an important role to support the load when the satellite is launched to space. so enough strength and stiffness. A designer could add unnecessary material and strength it so as not to fail when it used. But if mechanical part of satellite is over-designed, cost will rise and it also goes against to the aim of lightness. To achieve lightness and enough strength and stiffness, optimization algorithm should be introduced in design process. In this study, conceptual design of bracket is carried out to increase the performance of satellite. Some parameter which could change the weight of this part are selected as design variables. Total weight of bracket is to be minimized while displacement and stress should not exceed limit. Size optimization is done with 3D solid element and PLBA, the RQP algorithm. The weight of 0.262kg of initial model is reduced to 0.241kg after optimization process, so 9.8% of weight reduction is obtained.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 The 6th International Symposium of East Asian Resources Recycling Technology
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• pp.432-436
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• 2001

In this study, calcium sulfate(gypsum) powder was obtained using waste sulfuric acid and stainless refinery sludge by- produced from chemical reagent and the iron industry, by the neutralization of waste sulfuric acid. As variables for the experiment the mole ratio of the H$_2$SO$_4$ : Ca(OH)$_2$, the pH, the reaction temperature and time, the amount of catalyst were used. The crystal shape and microstructure of obtained powder were observed by XRD and SEM, and the thermal property was investigated by DTA. As the NaCl is added 0~20wt% as a catalyst to the H$_2$SO$_4$ : Ca(OH)$_2$, system it can be found that the crystal shape goes through the processes as follows : gypsum dihydratlongrightarrowgypsum hemihydrate＋gypsum dihydratelongrightarrowgypsum hemihydrate. And gypsum hemihydrate is $\beta$-type as the result of DTA. As waste sulfuric acid and stainless refinery sludge were used, the pH of reacted solution (which was 0.8) was rapidly raised up to 8~9 by the addition of stainless sludge and gypsum dihydrate was produced as a by-product. Therefore, it was found that stainless refinery sludge is sufficiently applicable for the neutralization of waste sulfuric acid.

• 혜화의학회지
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• 제11권1호
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• pp.237-256
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• 2002

In view of the results that we studied about living and eating habit of korean old people who live in longevity village, we can make conclusion as follows. 1. They have regular rising time, bedtime and living routine. Their bedtime is between 9 to 11 and rising time is before 6. It goes to show that they are keeping regular hours. 2. Generally speaking, most of long life peoples are physical labor: agriculture, fishery, housework, etc. 3. They are in balance with their eating habit. The most favorite food of longevity village's old people is made from toenjang which is fermented soybean paste. 4. The geographical features of longevity village are mountain region, coast and island. 5. Most of people who live long are illiteracy and only a few people of them has finished elementary school course. Moreover, in case of illiteracy, there are more unschooled woman compare with both sexes.

• 한국의류학회지
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• 제9권2호
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• pp.57-65
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• 1985

In the experiment with a basic material for the design of summer wear that comfort can be obtained in temperature, to get individual differences, clothing styles (slacks, skirt), material differences(T/C, cotton), and the contrast between when naked and dressed, when two healthy females were dressed four kinds of summer wear as an object of experiment under the regular warm temperature environmental condition (24, 28, 32, $36^{\circ}C$, $60\pm10\%$ RH), the measurement of physiological, phychological change was taken and the result goes as follow; 1. Mean skin temperature rose by clothing, body weight loss decreased below $32^{\circ}C$, thermal sensation changed toward low temperature by $2\~3^{\circ}C$. 2. Mean skin temperature, body weight loss, the lowest blood pressure above $32^{\circ}C$, under-clothing temperature, and thermal sensation increased when in slacks to be compared with when in skirt. 3. Ambient temperature had a great effect on mean skin temperature, body weight loss, respiration, clothing surface temperature, under-clothing temperature and humidity, thermal sensation, etc. 4. It was admitted that pulse, thermal sensation, comfort show different individuality. 5. It was recognized that the lowest blood pressure, clothing surface temperature, under. clothing humidity differ according to the kinds of clothing. 6. A comfortable ambient temperature in clothing summer wear was about $27\~28^{\circ}C$.

• 디지털산업정보학회논문지
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• 제9권2호
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• pp.151-163
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• 2013

It goes without saying that the technology innovation plays an important role in the sustainable growth of the firm in the global economy. It, however, is not easy to fulfill this simple and obvious fact. Because there are a lot of barriers hindering innovation activities of firms and innovations are interrupted or don't even attempts by this barriers. So in this paper, I study barriers of firms that try to innovation and how much negative impact exist on firm's innovation performance by that. And also I try to find influence on firm's performance because of declined innovation activities. To prove this, KIS(Korean Innovation Survey) 2008, which was surveyed by STEPI(Science and Technology Policy Institute), is used to find relationships among variables; innovation barriers, innovation activities and firm's performance. In the result, I find that financial barrier influence negatively to the process innovation with small business, capable barrier influence negatively to the process innovation with large business and organizational barrier influence negatively to the process innovation with both small and large business. And, it also appear that organizational barrier has not moderating effect but process efficiency has moderating effect significantly with small business that have more positive effect.

• 통상정보연구
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• 제9권2호
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• pp.41-64
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• 2007

A life insurance industry's market is reaching a state of saturation recently, and the competition is as time goes by intense among the non-life insurance industry. Consequently, the insurance companies must grope a new source of revenue and develop a new business model for a stability growth. At the forked road, the insurance companies must group the existing and new customers in order to find the royal customers, and develop a new service with them. Accordingly, it is the time to study the advance of PB field and the royal customer management that will maintain and expand the new relations with them. Besides, the PB was the service to begin in needs of the specific group, but now it is regarded as a new source of high profit in the age of universal financial service among the financial circles. As a consequence, the PB marketing is introduced in haste, and such trend seems to be continued. Therefore, the plans that help the domestic insurance company reflect the characteristic of the insurance and expand the scope of business into the scope of property management according to the needs of customers under a universal financial service trend will be studied.

• Progress in Superconductivity
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• 제1권1호
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• pp.9-13
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• 1999

The influence of quenching temperature and annealing time on superconducting characteristics has been investigated for a $(Pb_{0.6}V_{0.4})Sr_2(Ca_{0.65}Er_{0.35})Cu_2O_z$ compound. From the resistivity measurements for samples annealed at $400^{\circ}C$ to $860^{\circ}C$ in oxygen and subsequently quenched, it is observed that $T_c$(zero) of the sample decreases with the increase of annealing temperature up to $600^{\circ}C$ and increases again beyond $700^{\circ}C$. Annealings of the sample at $860^{\circ}C$ show that $T_c$(zero) goes through a maximum of 62K with the increase of the annealing time. It is also found that $T_c$(zero) of the sample quenched from high temperature decreases when the sample is subjected to low temperature annealing below. $600^{\circ}C$ in oxygen. The experimental results indicate that the as-prepared samples contain excessive oxygen and removal of this excessive oxygen in as-prepared samples is a key factor in controlling the superconducting properties of the samples and are discussed in connection with thermal gravimetric measurements.

• 한국식품영양학회지
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• 제9권4호
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• pp.478-483
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• 1996

풋감을 30일간 저온저장(7$^{\circ}C$) 및 냉동저장(-2$0^{\circ}C$) 하면서 성분의 변화를 조사하였다. 수분, 단백질, 지질, 탄수화물 등의 일반성분은 저장방법이나 저장기간에 따른 변화가 없었으며, 조섬유 함량은 냉동저장 시는 거의 변화가 없었으나 냉장저장 시는 저장기간이 길어짐에 다라 약간씩 감소하였다. 폴리페놀 함량은 냉장, 냉동저장에서 모두 증가하였으나 냉동저장의 경우 증가폭이 매우 컸다. 총 펙틴 함량은 저장기간이 연장에 따라 감소하였고 수용성 펙틴 함량은 증가하였는데 냉동저장인 경우는 그 증가나 감소 정도가 매우 적었다. 탄닌 함량은 냉동저장 시는 거의 변하지 않았으나 냉장 저장한 경우는 크게 감소하였다.

• 대한안전경영과학회지
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• 제9권6호
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• pp.19-29
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• 2007

According to industrial disaster statistics by the Ministry of Labor in 2006, out of 11,688,797 people working at 1,292,696 business places that apply Industrial Disaster Indemnity Act, 89,910 workers were involved in an accident that more than 4 days of medical treatment requires. Among this figure 2,453 people lost their precious lives. "89,910 industrial disaster victims per annum" is showing the safety level of our industrial situation. To prevent such industrial disaster, the most typical and distinctive method is Accident-free Campaign. At the beginning, the movement arose with devotion through out the entire industry. But, the heartbreaking fact is that the fever is getting cool gown as times goes by. Therefore, opportunity for revitalization of this movement is required. The movement should be practically supporting principle of respect for human life and dignity. And it should be established with analysis on industrial disaster and systematize Accident-free Campaign totally in connected research.

• 한국태양에너지학회 논문집
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• 제35권4호
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• pp.35-41
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• 2015

This study was conducted to develop a heat pump system to utilize waste heat within the greenhouse during the daytime in winter season. The system runs at 8 am to 6 pm for the heat storage operation, and from 6 pm to 8 am of the next day for the heat radiant work. In the case of the heat storage operation, the average solar radiation was $168.3W/m^2$ with $16.3^{\circ}C$ outside temperature. The $COP_s$ of the system shows 4.59 in this operation mode. When the temperature goes up to $18.6^{\circ}C$, the system $COP_s$ reached at 5.10. On the other hand, the $COP_h$ of the system in heat radiation mode shows 2.63. In this case, the inside of the greenhouse temperature was reaches at $24.7^{\circ}C$ when the outside temperature was $12.9^{\circ}C$.