임대주택(賃貸住宅)의 내재적(內在的) 특성(特性)에 관(關)한 연구(硏究) - 서울의 공동거주형(共同居住型) 임대주택(賃貸住宅)의 사례(事例)를 중심(中心)으로 -

이윤희,정재국,Lee, Yun-Hee,Jung, Jae-Kook 한국주거학회 2010 한국주거학회 논문집 Vol.21 No.4

In the modernization process of the city, urbanization raised a variety of social issues. Urbanization brought noticeable changes in dwelling patterns, such as drastic changes in the housing lifestyle, that revolved around the metropolitan areas of Seoul and Busan etc. before and after the expansion of economic growth. Especially in 1985, when 23.8% of the country's population was concentrated in Seoul, the imbalance of housing supply and demand caused a vast range of housing shortage. The shortage, that resulted from public sector mishandling of natural housing demand, lead to the occurrence of private sector rental housing. The occurrence of this abnormal rental housing supply, became a major cause of Korea's typical lease system called 'Co-dwelling', where the leaseholder and tenant physically lives in the same residence. The leaseholder and tenant's 'Co-dwelling' started from partial renting of traditional Korean-style housing and transformed with the transition of dwelling form and time. However, after 1985, legalization of multi-family housing, Korean rental housing started to be planned in the beginning of it's housing construction and to be produced as an independent space with separate circulation. Also in terms of facility, it changed from partial renting of a space within the residence to an assembly of small individual spaces. However, the background of this deep-rooted 'Co-dwelling' lease system, in different forms and periods of residence, is still based on the lack of public sector rental housing supply and private sector supply of rental space to utilize extra space, 'Jeonsei' payment.

한국 근대 의료 건축물에 관한 연구

한동관(HAN Dong Gwan),류창욱(RYU Chang Ug),고상균(KO Sang Kyun),정재국(JUNG Jae Kook),문종윤(MOON Jong Youn),박윤형(PARK Yoon Hyung) 大韓醫史學會 2011 醫史學 Vol.20 No.2

It was the late Chosun Dynasty and Daehan Empire era that Western Medicine has firstly been introduced to Korea, previously operating on a basis of Korean traditional medicine. Western Medicine has been introduced by American missionary and Japanese Imperialism. An introduction of Western Medicine made it feasible to proceed new type medical care including operation, leading to require a new form of medical facilities. In the beginning, new facilities were constructed by Japanese Imperialism. Other hand many of facilities including Severance Hospital were established by missionaries. First of all, Daehan Empire established and managed a modern type of medical facility named "Jejoongwon" in 1885 as a government institution hospital. The Red Cross Hospital built in 1889. Afterwards, Jejoongwon and the Red Cross Hospital were taken over to missionary hospital and Japanese Imperialism, respectively. Japanese Imperialists firstly have protected their nationals residing in Chosun but have proceeded care a few Chosun people to exploit medical treatment as a mean to advertise superiority of the Empire of Japan. The facility that has firstly been established and managed was Jeseang Hospital in Busan in 1877, leading to establish in Wonju, Wonsan, and Mokpo. Afterwards, Japan has organized "Donginhoi" as a civil invasion organization, leading for "Donginhoi" to established "Dongin Hospital" in Pyeongyang, Daegu, and Seoul. Since 1909, governmental leading medical facility named Jahye Hospital was established according to an imperial order, leading to establish 32 hospitals all over the nation. American missionaries have established and managed 28 hospitals started from Severance Hospital built in 1904. However, Chosun doctors started to having educated and opening up their own hospital since 1920, leading for many of medical facilities to be established, but most of them have taken different roles followed by 6.25 War and economic development period. However, some of them are currently under protection as cultural assets, and some of them are now preserved. Buildings have originally been structured of wood as a single story in the beginning, but bricks started to be steadily used, leading to build two story building. Each of clinic department started to be separated since 1920, establishing operation room and treatment room. Now, a change of perception as to buildings that need to be preserved and an attention from government and doctors are required since modern medical facilities keep disappearing.

Helicon Plasma-Enhanced Chemical Vapor Decomposition에 의한 Carbon Nanotubes의 합성 및 표면 위에 금속 나노 입자의 코팅

윤옥자 ( Ok Ja Yoon ),윤국로 ( Kuk Ro Yoon ),문성민 ( Soung Min Moon ),정재국 ( Jae Kook Jung ) 한국공업화학회 2006 응용화학 Vol.10 No.1

太陽輻射에너지의 備蓄 方案硏究(Ⅰ) 水素에 의한 備蓄과 問題點

鄭在國 崇田大學校 1977 論文集 Vol.7 No.1

The solar energy that reaches the earth's land is several thousand times the world's present electric power capacity, moreover it is clean energy. These are the great attractions of solar energy as a new energy source. But cost, storage and transportation remain the great drawback. Cost will be met in future by the continous arizing of the cost of present energy sources such as coal, oil, etc, and by the soundly based and capably directed programs of scientific research, engineering development and technological innovations. The problem of storage and transportation will be solved by the various methods, but the hydrogen energy system is the most attractive one. This paper discusses the hydrogen energy system: to electrolyze water with solar-generated electrical energy and to store hydrogen. Solar furnace with cylindrical paraboloidal concentrator was constructed to measure power absorbtion. The rate of energy absorbtion was about 0.5kw/m². Using this data, the cost of hydrogen energy was estimated and compared with that of present energy such as coal, oil and electric power.

균일한 바람에 의한 薄膜流의 Ridge Instability

鄭在國 崇田大學校 1977 論文集 Vol.7 No.1

This paper deals theoretically with the problem of the ridge instability of a laminar flow of a viscous fluid. The surface of the thin liquid film is tangent to uniform wind whose direction is normal to the direction of the flow. Because of wind, tangential stress at the interface has a non-zero value. So the velocity of the primary flow has two components, and the Orr-Sommerfeld equation is slightly extended. The Solution of the extended Orr-Sommerfeld equation is developed as a power series in the space coordinate normal to the inclined plate. It is shown that, when wind is not present, the ridges are stable for all values of Reynolds number and all values of the angle of inclination. This result agrees with the work of Yih and of Benjamin. When wind is present, calculation shows that fluid ridges become unstable for small wave number.

CHALCOPYRITES 결정격자에 대한 존-중심에서 포논의 진동수에 관한 연구

김철영,이승학,임승혁,정재국 中央大學校 基礎科學硏究所 1995 基礎科學硏究所 論文集 Vol.9 No.-

We report a detailed investigation of the zone-centered phonons in chalcopyrites at Γ-point. The equations of motion of ZnSnP₂, CdSnP₂, CdSiP₂and CdGeP₂in chalcopyrite structure are formulated by using the harmonic approximation method. The force constants used in this study are two first-neighbor central and one second neighbor angular force constants following Bettini. With these force constants, dynamical matrix can be obtained. The secular equations constructed from this dynamical matrix are solved by software called mathematica. In this study, we got 3 acoustic and 21 optical phonons at Γ-point. the modes of 21 optical phonons are assigned by comparing with the results of group theoretical analysis. These are compared with the experimental Raman shifts and Bettini's. Our results explain the Raman shifts fairly good.

이중탐침과 마이크로파 간섭계를 이용한 헬리콘 플라즈마 분석

정재국,윤옥자,전원배 中央大學校 基礎科學硏究所 2001 基礎科學硏究所 論文集 Vol.15 No.-

The results of experimental investigations of high density plasma source excited by helicon wave under RF and low magnetic field are presented. We have generated high density helicon plasma over 10^17m_-3 in rf power(~1kW), low magnetic field(~300Gauss) with Nagoya type Ⅲ(m=1 mode) antenna at gas pressure(5mTorr). the densities of plasma in our plasma source are observed by double Langmuir probe and microwave interferometer. The B-field and input power dependance of the plasma density are presented and compared with other experimental characteristics. A study of the density profile and the electron temperature distribution has aided in the understanding of the helicon plasma generation. these are plotted along by z-axis, applied rf-power, magnetic field respectively.

小出力 太陽熱 發電에 관한 硏究

金暻烈,林永顥,鄭在國,權寧弼 崇田大學校 1981 論文集 Vol.11 No.1

For a linkage type concentrating collector which tracks the sun from the east to the west, performances are simulated. Using the simulation programs, the problems of the choice of an optimal height of the tower and an optimal heliostat arrays are cliscussed. The obtainable maximum energy from the heliostat field of the size of 100×100 is calculated as a function of solar time and season. The result shows that this type of collector has better efficiency in winter than in summer. We also developed a heliostat which is composed of 4 plane mirrors, and analyzed the sun image formed by the heliostat. The predictive equations agree well with the experiments performed over a range of angles of incidence up to 20。 and over a slant range between 0.5f∼1.5f(f is the forcal length of the heliostat)

AgGaS₂의 광학적 특성

정재국,오동선 中央大學校 基礎科學硏究所 1989 基礎科學硏究所 論文集 Vol.3 No.-

Single crystals of AgGaS₂are grown by the directional freeezing technique. From x-ray diffraction pattems of powder method, the chalcoopyrite structure is confirmed and lattice parameters are determined to be a=5.737Å and c=10.317Å The Peaks corresponding to free and bound excitons and a broad band emission due to D-A pairs are observed on the PL sepctra at 20K The binding energy of the free excitons are determined to be 23 and 27 meV and the dissociation energy of the bound excitons to be 7 and 48 meV. Teh lowest energy gap, Eg, was determined in the temperature range 20 to 300K from absorption spectra. The temperature coefficient of Eg is found to have an unusual positive sign below 80K, which can be attributed to an anomalous lattece dilation effect. Eight Raman active phonons are seen in the Raman spectrum.

다중음극 전자빔 플라즈마 장치의 플라즈마

정재국,고동균 中央大學校 基礎科學硏究所 1997 基礎科學硏究所 論文集 Vol.11 No.-

The conceptual design and the basic experiments of the Multi-Cathode Electron Beam Plasma Source(MCEBPS) were carried out. The MCEBPS can generate uniform and dense plasma over the wafer diameter of 300mm for the processing of semiconductor devices. We diagnostied plasma parameters with langmuir probe constructed by tantalum. Langmuir probe to diagnostic plasma is well known in recent and DT VEE program was used to calculate plasma density, electron termperature, plasma potential and floating potential. The plasma ?? and floating ?? were uniformly maintained and their difference was small and the electron temperature was low. In this condition, the damage induced by plasma processing could be minimized. In conclusion, the MCEBPS is suitable for manufacturing the advanced Ultra Large Scale Integration(ULSI) devices.