• 한국콘텐츠학회논문지
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• 제20권3호
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• pp.245-253
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• 2020

전월세 전환율이 시장이자율 또는 임대인의 기대수익률이라면 전국의 전월세 전환율은 동일하여야 한다. 그러나 전월세 전환율은 항상 시장이자율보다 높은 수준을 유지하고 있다. 본 연구는 임대주택의 공급원가 구성요소를 현재의 주택가격, 시장이자율, 감가상각비, 보유세, 그리고 임대차에 따른 위험이 존재할 경우 위험프리미엄으로 파악하고 현재의 주택가격과 각 요소와의 관계를 파악함으로써 주택임차료를 현재 가격으로 표현하였다. 이를 통해 주택가격의 변동 폭을 암묵적으로 가정하거나 전월세 전환율에 현재의 주택가격이 반영되지 못한 단점을 극복하였다. 본 연구는 임대주택의 공급 원가를 구성 요소 간의 조합으로 표현함으로써 전월세 전환율이 시장이자율이 아니라 임대인의 필수수익률 또는 요구수익률임을 밝혔다. 이는 전월세 전환율이 항상 시장이자율보다 높은 현상도 설명할 수 있을 뿐만 아니라 전월세 전환율의 지역별 차이 및 주택 유형별 차이가 발생하는 원인도 설명할 수 있다.

• 한국주거학회논문집
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• 제13권2호
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• pp.15-22
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• 2002

This paper aims to analyze the changes in the living arrangements of the elderly in Chejoo-do for the elderly housing supply by using census data. The conclusions are as follows; The rate of living alone and living with spouse only of the elderly have been increasing. The trend in county was higher than that in city. Living alone rate of the elderly of Chejoo-do was higher than that of Korean average. Even in the oldest old, living alone rate has been increasing in Chejoo-do. It is a unique phenomenon in Korea and similar with U.S. In Chejoo-do, it is strongly required to evolve elderly housing by universal design for living alone elderly in county as well as for living alone elderly in city.

• 한국지열·수열에너지학회논문집
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• 제15권4호
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• pp.39-45
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• 2019

The operational conditions such as cooling tower water pump flow rate, cooling tower fan flow rate, and chiller capacity in heat source equipment, and supply air temperature and chilled water temperature in air conditioner are considered to study the effects on energy consumption for central cooling system by using TRNSYS program. As a result, the optimal values of supply air temperature and chilled water temperature for minimal total energy consumption are 12℃ and 8℃. And if maximum values of cooling tower water pump and fan flow rate is decreased from 100% to 40%, energy consumptions are increased 170MJ/day and 63.2MJ/day, respectively.

• KSBB Journal
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• 제4권2호
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• pp.74-77
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• 1989

Volumetric productivity를 향상시키기 위하여 미생물 재순환에 의한 연속 시스템을 이용하였다. 연속발효조의 연구에서 9.2g/1와 15.0,g/1의 범위의 세포 농도를 유지할 수 있었다. 4%의 xylose의 feed와 1.04g $O{_2}$hr-g DCW의 specific oxygen supply rate의 조건에서 희석율이 0.0349 h$^{-1}$ethanol 수율은 0.36이었다. Ethanol volumetric productivity는 같은 희석율에서 0.244g/hr-$\ell$로 증가하였으며 이것은 회분배양값의 260%이었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 A
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• pp.410-412
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• 2002

So far, electricity rate under the midnight hour incorporates policy consideration and maintains fixed irrespective of generation cost. Therefore, the promotion of midnight power apparatus has been rapidly increased due to increasing difference in substitute heating cost. This paper estimates the power supply cost during midnight times and analyzes the rate mechanism which can promote economic midnight power apparatus. In addition it provides the alternative on the direction of policy after the restructuring.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2012년도 제44회 KOSCO SYMPOSIUM 초록집
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• pp.29-31
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• 2012

The effects of combustion parameters on the characteristics of a steam-methane reformer. The reformer system was numerically simulated using a simplified two-dimensional axisymmetric model domain with an appropriate user-defined function. The fuel ratio, defined as the ratio of methane flow rate in the combustor to that in the reactor, was varied from 20 to 80%. The equivalence ratio was changed from 0.5 to 1.0. The results indicated that as the fuel ratio increased, the production rates of hydrogen and carbon monoxide increased, although their rates of increase diminished. In fact, at the highest heat supply rates, hydrogen production was actually slightly decreased. Simulations showed that equivalence ratio of 0.7 yielded the highest steam-methane mixture temperature despite a 43% higher air flow rate than the stoichiometric flow rate. This means that the production of hydrogen and carbon monoxide can be increased by adjusting the equivalence ratio, especially when the heat supply is insufficient.

• 한국분무공학회지
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• 제9권2호
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• pp.18-23
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• 2004

An experimental studies of conventional gasoline fuel pump were carried out to obtain fundamental data fur liquid phase LPG injection(LPLi) system. A regenerative type and a roller-vane type of pumps were investigated in various operational condition. The experiments were performed to obtain flow rate of LPG fuel as a function of pressure differences and temperatures. The regenerative pump had too low flow rate at some experimental conditions to use this pump system for LPLi fuel supply system. On the other hand, the roller-vane type pump can be applied to the system only if its check valve is modified. Cavitation might occur in this system which can result in system noise, flow rate variation, and pump durability problem. To solve these problems the system is needed to increase $NPSH_{re}$(required net positive suction head).

• KIEE International Transactions on Electrophysics and Applications
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• 제3C권6호
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• pp.230-235
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• 2003

In this paper, a superposed discharge type ozonizer with an internal dielectric that can be made into a vacuum tube has been designed and fabricated. Ozone generation and discharge characteristics have been investigated in accordance with output voltage of power supply, flow-rate, discharge power and vacuum of inside internal dielectric. Pure oxygen was used as the supply gas of the ozonizer. Ozone concentration and ozone generation are gradually increased when discharge power is increased at the same flow-rate and they are both proportional to the vacuum level. As such, the maximum ozone concentration of 8840 ppm was obtained at vacuum 0.1 Torr and flow-rate 0.5 $\ell$/min.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2001년도 학술발표대회논문집
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• pp.119-127
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• 2001

This paper aims to analyse the changes In the living arrangements of the elderly in Chejoo-do for the elderly housing supply by using census data. The conclusions are as follows; The rate of living alone and living with spouse only of the elderly have been increasing. The trend in county was higher than that in city. Living alone rate of the elderly of Chejoo-do was higher than that of Korean average. Even in the oldest old, living alone rate has been increasing in Chejoo-do. It is a unique phenomenon in Korea and similar with U.S. In Chejoo-do, it is strongly required to evolve elderly housing by universal design for living alone elderly in county as well as for living alone elderly in city.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2003년도 학술대회논문집
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• pp.381-385
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• 2003

In this paper, a co-axial type ozonizer varied with discharge gap was designed and manufactured for investigating $\circled1$ discharge characteristics with variation of output voltage power supply, flow rate and gap $\circled2$ ozone generation characteristics with variation of flow rate, gap and discharge power. pure oxygen was used as process gas of the co-axial type ozonizer. In this paper, a double cylindrical type superposed silent discharge type ozonizer which internal electrode can be produced a vacuum has been designed and manufactured. Discharge and ozone generation characteristics have been investigated in accordance with output voltage of power supply, flow-rate, discharge power and vacuum of internal electrode.