웹카메라를 이용한 천체사진촬영에 관한 연구

류성룡,황완기 금오공과대학교 2006 論文集 Vol.27 No.-

Recently, CCD cameras has been widely adoped for astronomical photography. CCD is more sensitive than photographic film and has the advantage of e,ISY digital image processing. In this paper, we have used a PC web camera instead of expensive commercial astronomical CCD camera for astrophotography. The images of the bright objects such as Moon, Sun, and Jupiter have been easily obtained by an ordinary web camera. A Vesta Pro web camera have been modified by Steve Chamber method for long exposed astrophotography. The thermal noise of the CCD has been dramatically decreased by cooling the CCD with a Peltier device. The initial images of the globular clusters M3 and M13 have been obtained with the modified Vesta Pro~SC web camera. We could obtain the bright pictures correspond to the long exposed photography by digitally adding the several short exposed frames. The noise of the long exposed frames were greatly reduced compared to the short exposed frames. In conclusion, we have shown that the web camera can be used for astrophography very economically in middle schools and high schools which have telescopes with limited tracking ability.

퇴행성 슬관절염 환자 평가 설문도구의 내적 신뢰도, 상관성에 관한 연구

류성룡,안경애,서병관,강중원,이상훈,이재동,최도영,김건식,이두익,이윤호 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-

Objective : The aim of this study is to evaluate internal reliability and correlation among assessment instruments of knee OA. Methods : Data were obtained from 85 patients with knee OA. They were asked to answer VAS pain scale, two disease-specific questionnaires (WOMAC and LFI) and one instrument about health-related quality(KHAQ). Reliability was assessed using cronbach's alpha. Correlation was assessed by examining the pearson's correlation coefficients. Results : Cronbach's alpha of all Index except WOMAC stiffness subscale(.6679) exceeded the value of 0.70. A good correlation was obtained between WOMAC Subscale (especially Pain Subscale) and LFI (.726<cronbach's alpha<.791). Also, Correlation between KHAQ and two disease-specific questionnaires (WOMAC and LFI) was good(.612<cronbach's alpha<.662). Conclusions : All used instruments have good internal reliability. also, There are good correlation among them. The treatment of knee OA must be focused on health related quality. For this, we should use proper assessment instruments.

과학사를 적용한 과학 수업이 학업성취도에 미치는 효과

류성룡,서연경 금오공과대학교 2006 論文集 Vol.27 No.-

본 연구에서는 실험집단(33명)과 통제집단(33명)을 대상으로 중학교 3학년 과학 「일과 에너지」단원에 대하여 과학사를 적용한 과학 수업과 전통적인 교과서 중심수업을 실시한 후 실험 집단과 통제 집단 간, 성별 간, 성취 수준별로 각각 분석하였다. 전통적인 교과서 중심 수업을 받은 통제 집단에 비해 과학사를 적용한 과학 수업을 받은 실험 집단이 더 높은 학엽성취도를 보인 것으로 나타났다. 이는 과학사를 적용한 과학수업을 통해 학생들이 과학 수업에 대한 흥미와 동기를 유발시킬 수 있고, 과학사에 나타난 개념의 발달이 학생 개개인이 과학적 개념을 받아들이고 발달시키는 과정과 유사하기 때문에 학생들 스스로가 과학적 개념이 발달하는 과정을 인지할 수 있기 때문이라고 본다. 남학생 또는 여학생의 성별에 따라 크게 학업성취도 면에서 차이는 없는 것으로 나타났다. 과학사를 적용한 과학 수엽이 학업성취도에 미치는 효과를 성취 수준별로 분석해보면 하위 집단이 중위 집단이나 상위 집단에 비해 더 효과가 있었다. 이는 하위 집단의 경우에 과학사 이야기를 통해 과학에 대한 관섬과 흥미를 유발할 수 있었기 때문이다. 제한된 시간과 조사 인원이 충분하지 않은 문제가 있지만 과학사를 적용한 과학수엽은 학생들의 과학 학업 성취도 변에서 전통적인 교과서 중심 수업에 비해 더 효과적인 방법이라고 판단된다.

갈륨비소/갈륨알루미늄비소 양자우물 안에 있는 중성의 주개에 대하여 자유전자레이저를 이용한 포화분광학적 연구

류성룡 金烏工科大學校 1998 論文集 Vol.19 No.-

Saturation of the Do Is-2p+ transition has been studied in donor (Si)-doped GaAs/AlGaAs multiple-quantum-well sample by magneto-transmission and magneto - photoconcuctivity measurements with the UCSB free electron laser. Effective lifetime of the Do Is-2p+ transition were found to vary systematically with laser frequency, decresing from 62ns at 84cm-¹ to 3 ns at 124cm-¹.

退行性關節炎 韓方治療에 對한 最近 硏究 動向 : 臨床硏究 方法論을 中心으로 Herbal Medicines in the Treatment of Osteoarthritis in Pubmed and Chinese Medical Journals

서병관,류성룡,이송실,허정은,백용현,이재동,최도영,조윤제,김남재,박동석 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2004 東西醫學硏究所 論文集 Vol.2004 No.-

Objective : The aim of this study was to review systemically clinical trials on the effectiveness and safety of herbal medicines in the treatment of osteoarthritis. Methods : Computerized literature searches were carried out on seven electronic databases, and hand-searching on some chinese medical journals in library of Kyung Hee Medical Center. Trial data were extracted in a standardized, predefined manner and assessed independently. Results : 1. Thirty reports of clinical trials and two reports of meta-analyses concerning herbal medicine were collected and reviewed Among these reports three medical herbs were applied as topical medicine and others as internal medicine. 2. The western studies established NSAIDs or placebo as their control group. Five chinese reports established formulated herb pill(Ruanshnagshenjin pill) as their control group and Six did not establish a control group at all. 3. ACR was the most highly used diagnostic criteria in the western studies while the Chinese used their official criteria established by their government or the criteria of their text books. 4. 20 reports chose the Lequesne functional index, SHAQ, WOMAC OA index, AIMS, and their own unique scoring system as the criteria of analysing the effect. Others chose clinical symptoms, articular functions, and lab finding as their criteria. 5. 7 single herbs and 19 formulated herbs were studied. Among the formulated herbs, Achyranthes japonica was studied in 10 of the studies and Angelica gigantis Radix in 8, making them the most often studied herbs among the studies.

퇴행성 슬관절염 환자의 증상 중증도 지표와 DITI의 상관성 연구

서병관,류성룡,강중원,안경애,이재동,최도영,김건식,이두익,이윤호,이상훈 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-

Objectives : To investigate the applicability of thermography as severity measurement in the patients with osteoarthritis (OA) of the knee. Methods : Data were obtained from 80 patiens with OA of the knee. They were asked to answer two disease-specific questionnaire (Western Ontario and McMaster Universities (WOMAC) OA index, Lequesne's Functional Index (LFI)), one generic instrument (Korean Health Assessment Questionnaire (KHAQ)), VAS in order to assess the severity of disease, quality of life, degree of pain and taken thermography in standardized environment. Results : The thermal difference between ipsilateral side and contralaterla side of lateral aspect of knee was correlated with that of medial aspect of knee, and the thermal difference of anterior thigh was correlated with that of lateral, medial aspect of knee and patella region. Age, duration of disease, duration of morning stiffness, sex, crepitus, and painful side of knee were not correlated with the thermal differences of each region. LFI, WOMAC, WOMAC pain subscale, WOMAC stiffness subscale, WOMAC physical function, KHAQ,, VAS were not correlated with the thermal differences of each region. Conclusion : Further study on the thermography on OA of the knee in population with appropriate severity grade and the standardization of analysis of thermographic data were recommended.

제통단이 퇴행성 슬관절염 환자의 삶의 질에 미치는 영향

서병관,류성룡,강중원,우현수,이상훈,이재동,최도영,김건식,이두익,이윤호 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-

Objectives : to evaluate the effects of Jetongdan, the newly developed herbal medicine, on the quality of life in patients with osteoarthritis of knee Methods : Placebo-controlled, randomized clinical trial on the 80 patients with osteoarthritis of the knee was fulfilled. After enrollment, they took medication as they enrolled. And they were asked to answer the questionnaires (Korean Health Assessment Questionnaire (KHAQ), Lequesne's functional index (LF1), visual analogue scale (VAS)) and analysed with the erythrocyte sedimentation rate (ESR) at baseline, after 4 weeks and 8 weeks of medication. Results : Total KHAQ score, some categories of KHAQ like hygiene, activities were significantly improved after 8 weeks of medication. And the change of the KHAQ score was significantly correlated with the change of VAS. But LFI, VAS, ESR level was not significantly improved, and it was considered because of the short medication period and small size of study population. Conclusion : In conclusion, Jetongdan could improve the health-related quality of life in patients with osteoarthritis of knee. Further study in the large population, in long period were recommended.

고리 모양 에미터를 가지는 언더게이트 구조의 전계방출 특성 연구

김영길,이태동,류성룡 금오공과대학교 2005 論文集 Vol.26 No.-

The field emission characteristics was studied by simulation for an under-gate structure with a ring-shaped CNT emitter. The electric field strength was sharply peaked along the inner rim of the CNT emitter. For positive gate voltages the electron emission was concentrated there. With an assumed field enhancement factor of 1000, the operating voltage was about 7 V, only 1/10 of those of other reported structures. The effects of the gate bias polarity on the electron emission and the electron trajectories were discussed.

MOCVD 방법으로 제작된 GaAs/AlGaAs 반도체 양자우물의 Photoluminescence 및 반사율 스펙트럼 측정

이태동,김재봉,류성룡 國立金烏工科大學校 産業技術開發硏究院 2002 産業技術開發硏究 Vol.18 No.-

We studied the characteristics of MOCVD(metal-organic chemical vapor deposition)-grown GaAs/Al_0.3Ga_0.7As quantum wells by photoluminescence and reflectance spectroscopy as the sample temperature was changed from 10K to 300K. In photoluminescence spectra, we observed two peaks originated from quantum well region. Through a discussion based on the energy separation and the observed temperature dependence of their intensities, we identified them as the recombination lines of free excitons, and acceptor-bound excitons. The acceptors seem to be probably carbons background-doped in MOCVD processing. In the third derivative of reflectance spectra, the H_11 (e1-hh1) and L_11 (e1-1h1) excitonic transitions are observed. Their positions are in good agreement with the expectation based on numerical calculations of energy levels in quantum well.

한국 건물부문 탄소세 도입 방안

류성룡(Ryu, Seong-Ryong),정창헌(Cheong, Chang-Heon) 한국건축친환경설비학회 2015 한국건축친환경설비학회 논문집 Vol.9 No.6

Carbon tax is very effective method for the reduction of greenhouse gas in building section. This study suggests the carbon tax system of building section in South Korea. Carbon tax can be classified as direct tax type and indirect tax type. The proposed carbon tax system respectively linked to secured property tax, property transfer tax and energy tax type. The carbon tax with direct tax type will make the building owner aware of the importance of building energy. Hence, the carbon tax will enhance the low-carbon structuralization of building sector. The profit gained from carbon tax in building sector must be redistributed to stakeholders in building section as incentives to secure the sustainability of the low-carbon structuralization.