과잉농산물의 이론적 고찰

이종훈 中央大學校經營大學 1959 經營論集 Vol.10 No.-

복합시스템 가로등용 소형 풍력 터빈 설계 및 성능 평가

이종훈,이연원,김영덕,박광열,최윤환,김정환 한국풍공학회 2006 한국풍공학회지 Vol.10 No.1

By both the cost increase of crude oil and the lack of natural fossil fuel nowadays, many countries and laboratories are conducting researches about the using of natural energies. On this tendency, we had a point of view on the development of streetlight using hybrid system which can simultaneously apply both wind and solar energy. In this study, we limited the development of the rotor blade for a 3 bladed type horizontal axis wind turbine (HAWT) because the solar cell for the generation of electric power could be easily bought in the market. We used the blade element method (BEM) to develop this rotor blade. And our simulation was carried out by CFD method for the estimation of its efficiency. As the results, the rotating period of the wake was increased with the rotating speed of rotor blade. And the wake of 3 bladed type HAWT showed two rotating motions - tip vortex and central vortex - with the increase of TSR number. Finally, we could find that the new rotor blade for the 3 bladed type HAWT was designed adequately because it indicated the required power at TSR number 6. 최근 천연화석 연료의 부족과 원유 원가의 상승에 의해 많은 국가와 연구실에서 자연에너지 이용에 대해 연구하고 있다. 이런 추세에 풍력 및 태양광 에너지를 동시에 이용하는 복합시스템을 사용한 가로등 개발에 초점을 맞추었다. 이 연구에서 태양광 발전을 위한 태양전지는 시중에서 쉽게 구입할 수 있기 때문에 3익 타입의 HAWT를 위한 로터 블레이드 개발로 한정하였다. 이 로터 블레이드의 개발을 위해 BEM을 이용하였고, 이에 대한 성능평가를 위해 CFD기법을 이용하였다

Retrospective Analysis of Chemoradiotherapy for Limited-Stage Small-Cell Lung Cancer

이종훈,김성환,김수지,이주환,김훈교,심병용 대한방사선종양학회 2009 Radiation Oncology Journal Vol.27 No.3

Purpose: This study was designed to analyze the outcome and toxicity of thoracic radiation therapy (TRT) and chemotherapy for patients who suffer with limited-stage small-cell lung cancer (LS-SCLC). Materials and Methods: We retrospectively studied 35 patients with LS-SCLC. TRT was administered once daily (1.8 to 2 Gy per fraction) and it was directed to the primary tumor for a total 50 to 66 Gy in 6 to 7 weeks. The patients received four cycles of etoposide plus cisplatin. TRT was begun on day 1 of the first cycle of chemotherapy in the concurrent arm and after the fourth cycle in the sequential arm. Results: The median progression-free survival time was 16.5 months (95% confidence interval [CI], 9.0 to 24.1 months) for the sequential arm, and 26.3 months (95% CI, 16.6 to 35.9 months) for the concurrent arm. The 2-year progression-free survival rate was 16.0 percent for the sequential arm and 50.0 percent for the concurrent arm (p=0.0950 by log-rank test). Leukopenia was more severe and more frequent in the concurrent arm than in the sequential arm. However, severe esophagitis was infrequent in both arms. The radiotherapy was interrupted more frequently in the concurrent arm than in the sequential arm due to hematologic toxicities (p=0.001). Conclusion: This study suggests that concurrent TRT with etoposide plus cisplatin is more effective for the treatment of LS-SCLC than sequential TRT. However, there is a significant increase in the risk of toxicities, and radiotherapy was frequently interrupted in the concurrent arm due to hematologic toxicities.

토양과 공기 중 석면함량의 상관분석을 위한 현장시험장치 개발 및 적용

이종훈,김선준,박성숙,오미혜 한국자원공학회 2013 한국자원공학회지 Vol.50 No.6

The objective of this study is to analyze the correlation of asbestos contents in soil with in air using field trial device in field scale experiment. Various wind velocities, 8 m/s, 11 m/s, 15 m/s and 18 m/s, respectively, were applied to evaluate releasable characteristics of the field trial device. Collected soil samples were analyzed by polarized light microscopy and SEM-EDS. Each air sample was examined by phase contrast microscopy. As a result, the field trial device was operable and its use was with ease. The correlation of asbestos contents in air with wind velocities represented positive, while the correlation of soil humidity with in air showed negative. In the case of 3∼6% asbestos contents in soil, it exceeded the acceptable risk range for exposure depending on soil humidity and wind velocity. It is suggested that remediation priority should be given to the site of >3% asbestos contents in soil. 본 연구는 현장규모에서 자체 제작된 현장시험장치를 이용하여 토양과 공기 중 석면함량의 상관관계를 분석하고자 하였다. 현장에서 8 m/s, 11 m/s, 15 m/s 및 18 m/s의 다양한 풍속에 의한 석면의 비산 정도를 측정하였다. 토양시료는 편광현미경법과 주사전자현미경법 및 X-선분광분석을 하였으며, 대기 시료는 위상차현미경법을 이용하였다. 실험결과, 현장시험장치의 작동성 및 편의성이 입증되었으며, 풍속이 증가할수록 비산되는 공기 중 석면 농도가 증가하는 뚜렷한 양의 상관관계가 나타난 반면, 토양 습도가 증가할수록 비산되는 공기 중 석면농도는 감소하는 음의 상관관계가 나타났다. 특히 토양의 석면함량이 3∼6%인 경우, 토양습도와 풍속의 조건에 따라 실내 공기질 권고 기준을 초과하는 경우가 나타났다. 따라서, 토양 내 석면의 함량이 약 3% 이상인 곳을 우선적으로 복원해야 할 것으로 판단된다.

Dependence of the Diode Characteristics of n-ZnO/p-Si (111) on the Si Substrate Doping

이종훈,J. Y. Lee,J. J. Kim,김홍승,장낙원,W. J. Lee,조채용 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.1

We report on the dependence of the diode characteristics of n-ZnO on p-type Si (111) on the dopant concentration in the Si (111) substrate. Silicon substrates were used with a high resistivity (p) (~1 −Ω 20·cm) and a low resistivity (p+) ~0.004 − 0.0055 Ω·cm). Zinc-oxide films were deposited using a radio-frequency sputtering system on the p and p+-Si (111) substrates at room temperature. The films were subsequently annealed at 800 ℃ in air and in N2 in a horizontal thermal furnace to change the electron carrier concentration. By investigating the current and the voltage characteristics of the diodes, we discovered that the diode characteristics depended on the carrier concentration. We discuss the relationship between the carrier concentration and the emission properties of n-ZnO/p-Si diodes. The devices exhibited excellent rectification behavior and diode characteristics, having a turn-on voltage of about 2.3 − 2.7 V and a series resistance between 215 and 330 Ω . The diode characteristics were modified by thermal annealing in an ambient, and n-ZnO/p+-Si (111) heterojunction diodes emitted yellowish light at voltages over 10 V.

한국과 크게 다른 프랑스의 대선 보도

이종훈 관훈클럽 2012 관훈저널 Vol.- No.123

Diode-pumped Nd:YAG Rod Laser with Single-side Pumping Geometry

이종훈,김영중,이강인,이재철,조준용,전용근 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.21

A pumping chamber for a diode-pumped Nd:YAG rod laser was developed. The pumping beam from a linear diode laser was incident on the rod from a single side. A planar-concave window was installed in front of the diode laser to expand the divergence angle of the emitted beam. The Nd:YAG rod was cooled by using a circulating coolant that flowed through the cooling tube. Due to the planar-concave window, even with a single-side pumping geometry, the uniformity of the pump beam’s distribution in the Nd:YAG rod was improved.

경사진 처프된 광섬유격자쌍에 기반을 둔 투과형 분산보상기

이종훈 대한전자공학회 2007 電子工學會論文誌-SD (Semiconductor and devices) Vol.44 No.4

This paper presents a transmissive dispersion compensator based on tilted chirped fiber Bragg grating pairs which happen mode coupling between core mode and cladding mode. And, as a result of simulation, the phase matching condition and optimum tilted angle to maximize the mode-coupling in the dispersion compensator are shown and the dispersion slope and bandwidth in the proposed dispersion compensator is respectively 3,068ps/nm and 0.45nm. 본 논문에서는 서로 반대방향으로 진행하는 코어모드와 클래딩모드사이에서 모드결합이 일어나는 경사진 선형처프된 광섬유격자쌍을 이용한 새로운 투과형 분산보상기을 제안하였다. 제안된 투과형 분산보상기에서 모드결합이 최대로 일어나기 위한 위상정합조건과 최적의 경사각을 제시하였으며, 시뮬레이션을 통해서 제안된 투과형 분산보상기의 분산기울기와 분산보상 가능한 대역폭은 각각 3,068ps/nm와 0.45nm이고, 투과형 분산보상기로 동작함을 보여주었다.

목정맥경유간속문맥전신순환연결술 후 이상좌위정맥에 의한 위정맥류 재출혈: 증례 보고

이종훈,김영환,강웅래,이영환 대한영상의학회 2014 대한영상의학회지 Vol.70 No.3

The aberrant left gastric vein can be a rare cause of gastric variceal bleeding in portal hypertensive patients. Careful examination of vascular anatomy on CT scan and simultaneous embolization of the aberrant left gastric vein during the tranjugular intrahepatic portosystemic shunt are necessary to prevent gastric variceal rebleeding. Herein, we report a case of gastric variceal rebleeding by the aberrant left gastric vein after transjugular intrahepatic portosystemic shunt, which was retrospectively diagnosed by CT scan and portogram, and successfully treated by coil embolization. 문맥압 고혈압 환자의 위정맥류 출혈에서 이상좌위정맥이 매우 드물게 원인이 될 수 있으므로 목정맥경유간속문맥전신순환연결술 시에 전산화단층촬영을 통해 혈관을 주의 깊게 관찰하여 이상좌위정맥 색전술을 동시에 시행하여야 위정맥류의 재출혈을 예방할 수 있다. 저자들은 목정맥경유간속문맥전신순환연결술 후 위정맥류 재출혈을 보인 환자에서 전산화단층촬영과 문맥조영술을 역행적으로 분석하여 이상좌위정맥에 의한 재출혈을 진단하였으며 코일을 이용한 색전술을 통해 성공적으로 재출혈을 치료한 1예를 경험하였기에 이를 보고하고자 한다.

산업의 체질개선과 지역식량체계 구축

이종훈 경남연구원 2009 경남발전 Vol.- No.105