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조정훈 한국정보처리학회 2014 정보처리학회지 Vol.21 No.4

Preparation of petroleum-based binder pitch for manufacturing thermally conductive carbon molded body and comparison with commercial coal-based binder pitch

조정훈,임지선,김민일,이영석,배병철 한국탄소학회 2020 Carbon Letters Vol.30 No.4

In the present study, carbon molded bodies were prepared by using graphite/coke fllers and petroleum-based binder pitch with various softening points, and the thermal properties of the prepared carbon molded bodies were investigated. The ratio of a binder afects the molded body preparation: no molded body was prepared at a low binder pitch content, and swelling occurred during the thermal treatment at a high binder pitch content. The binder pitch thermal treatment yield was the high�est at 41 wt% at the softening point of 150 °C and the lowest at 23 wt% at the softening point of 78 °C. A signifcant mass reduction was found in the range of 150 to 300 °C in the petroleum-based binder pitch, and in the range of 300 to 475 °C in the coal-based binder pitch. The molecular weight of the binder pitch was analyzed through the matrix-assisted laser desorption/ionization time-of-fight (MALDI-TOF) method. The molecular weight ratio within the interval showing the highest binder pitch molecular weight (178 to 712 m/z) was the highest at 66.4% in the coal-based binder pitch (softening point 115 °C) and the lowest at 46.0% in the petroleum-based binder pitch (softening point 116 °C). When the petroleum�based binder pitch was applied, as the softening point was increased, the voids decreased and thus the thermal conductivity increased. The highest thermal conductivity was 99.5 W/mK for the carbon molded bodies prepared using the coal-based binder pitch and 102.8 W/mK for those prepared by using the petroleum-based binder pitch. The results showed that the thermal properties were similar between the coal-based binder pitch (softening point 115 °C) and the petroleum-based binder pitch (softening point 150 °C).

Oncologic Outcomes of a Laparoscopic Right Hemicolectomy for Colon Cancer: Results of a 3-Year Follow-up

조정훈,임대로,허혁,민병소,백승혁,이강영,김남규 대한대장항문학회 2012 Annals of Coloproctolgy Vol.28 No.1

Purpose: The purpose of the study is to evaluate the oncologic outcomes of a laparoscopic-assisted right hemicolectomy for the treatment of colon cancer and compare the results with those of previous randomized trials. Methods: From June 2006, to December 2008, 156 consecutive patients who underwent a laparoscopic right hemicolectomy with a curative intent for colon cancer were evaluated. The clinicopatholgic outcomes and the oncologic outcomes were evaluated retrospectively by using electronic medical records. Results: There were 84 male patients and 72 female patients. The mean possible length of stay was 7.0 ± 1.5 days (range, 4to 12 days). The conversion rate was 3.2%. The total number of complications was 30 (19.2%). Anastomotic leakage was not noted. There was no mortality within 30 days. The 3-year overall survival rate of all stages was 93.3%. The 3-year overall survival rates according to stages were 100% in stage I, 97.3% in stage II, and 84.8% in stage III. The 3-year disease-free survival rate of all stages was 86.1%. The 3-year disease-free survival rates according to stage were 96.2% in stage I, 90.3%in stage II, and 75.6% in stage III. The mean follow-up period was 36.3 (3 to 60) months. Conclusion: A laparoscopic right hemicolectomy for the treatment of colon cancer is technically feasible and safe to perform in terms of oncologic outcomes. The present data support previously reported randomized trials.

독일어 'noch' 와 'schon' 의 의미분석과 제약

조정훈 독일언어문학연구회 1999 독일언어문학 Vol.12 No.-

사상체질분류검사(QSCC II)의 재현성에 관한 연구

조정훈,이창훈,장준복,이경섭,황덕상,Cho, Jung-Hoon,Lee, Chang-Hoon,Jang, Jun-Bock,Lee, Kyung-Sub,Hwang, Deok-Sang 대한한의학회 2006 대한한의학회지 Vol.27 No.3

Purpose: This study was conducted to investigate the reproducibility of responses to the QSCC II. Methods: Subjects have been tested by QSCC II for 2 or 3 successive years in Kangnam Korean Hospital at Kyunghee University from January 2002 to December 2005. We analyzed constitutions of the same subjects of each year tested. Results: In the second year of QSCC II assessment, 333 of the total 584 subjects were classed as the same constitutions as in their first test. The reproducibility was thus 56.88%. After the third year of QSCC II, 45 of a total 81 subjects were in the same constitutions. The reproducibility was thus 55.56%. Conclusions: We have found that the reproducibility of QSCC II is about 56%, so there is a severe limitation to diagnosis of constitution by QSCC II. Therefore, we must analyze constitutions through multiple objective methods.

황사연무통합예측모델 예측성 향상을 위한 에어로졸광학두께 자료동화체계 개발

조정훈,이희춘,홍승규,이상삼,임윤규 한국기상학회 2018 한국기상학회 학술대회 논문집 Vol.2018 No.10

집합건물내 상업용건물의 하자담보책임에관한 연구- 집합건물법 개선에 관한 연구 -

조정훈 동국대학교 비교법문화연구소 2018 比較法硏究 Vol.18 No.3

According to Article 9 in Act on Ownership and Management of Condominium Buildings(hereinafter Act on Condominium Buildings), person who parcels out a building and constructor should bear the liability of repairing defect or compensation, based on the regulation of contractee’s liability for warranty in Civil Law. Compared to the fact that liability for warranty originally occurs between the contractor and contractee, it clearly shows that the article is to protect the owner who bought the condominium building. Especially, it allows owner to easily exercise his or her right by making the constructor, who did not have contractual relation to sectional owner, responsible for warranty. Therefore, this thesis examines the liability for warranty in the Act on Condominium Buildings and the relations between different responsibilities by comparing the different liabilities for warranty regulated in other acts such as Multi-Family Management Housing Act. It was concluded that regulation system relevant to the liability for warranty of condominium that is multi-family housing is very confusing. Thus, the way to integrate different responsibilities and regulate the liability for warranty is suggested in the thesis. 집합건물법 제9조는 민법상 수급인의 담보책임에 관한 규정을 준용하여 집합건물을 건축한 건축주와 시공자에게 하자보수 및 손해배상의 책임을 부담시키고 있다. 원래 민법상의 담보책임이 도급인과 수급인과의 관계에서 발생한다는 측면에서 집합건물법의 규정은 집합건물을 분양받은 구분소유자를 보호하기 위한 것이라 할 수 있다. 본 연구는 최근 선분양 후입주라는 집합건물의 특성으로 인하여 집합건물에서 발생하고 있는 민법상 하자담보 책임을 일반적인 채무불이행 책임과는 전혀 다른 성질로 규정하고, 적용하는 현행법에 대한 궁금증으로 출발하였으며, 집합건물의 하자담보 책임에 관한 연구로서 현행법상 집합건물의 하자담보 책임제도의 문제점을 살펴보고 개선안을 제시하는데 그 목적이 있다. 이를 위해 먼저 집합건물내 하자담보 책임에 대한 법적일반론에 대해 문헌적 고찰을 실시하고 집합건물내 하자담보 책임제도에 대해 살펴보았다. 또한 하자담보 책임에 관한 관계법령과 적용범위, 법적성격, 그리고 현행 집합건물법 규정취지 및 적용범위와 구체적인 담보책임의 내용에 대해 조사해 보고 집합건물법상의 한계점과 개선방안에 대해 3가지를 제시하였다. 첫째 집합건물 하자담보 책임의 범위를 명확히 하기 위해서는 민법의 매매, 도급에 관한 규정에 하자의 개념과 그 판단기 준에 관한 공적기준을 신설할 필요성이며, 두 번째는 집합건물의 하자담보 책임의 주체로 분양자 이외에 시공자를 명문화할 필요가 있는 점을 제안하였다. 마지막 세 번째는 집합건물의 담보책임뿐만 아니라 민법의 건축수급인의 담보책임 또한 강행규정화할 필요성에 대해 제안하였다.

강화학습을 활용한 고속도로 가변속도제한 및 램프 미터링 전략 개발

조정훈,이은학,고승영,김동규 대한교통학회 2021 대한교통학회 학술대회지 Vol.85 No.-

최근 도시 인구 밀도의 증가와 심화된 교통 혼잡을 해결하기 위해 스마트 고속도로 운영 전략이 대두되고 있다. 그 중 기계학습 모델을 활용한 가변 속도 제한(VSL) 제어 및 램프 미터링(RM) 전략이 교통 흐름 개선에 효과적이라고 알려져 있다. 본 연구의 목적은 강화학습 알고리즘 중 하나인 Deep Deterministic Policy Gradient(DDPG)를 적용하여 여러 VSL 구간과 램프가 있는 고속도로 상황에서 충격파를 완화하여 효율적인 교통 흐름과 안전을 위한 운영 전략을 개발하는 것이다. 미국 캘리포니아 주의 고속도로의 구간 차량검지기 데이터와 SUMO를 활용한 교통류 시뮬레이션으로 실험을 진행했다. 실험 결과, 전반적으로 VSL 또는 RM 전략은 구간 내 차량의 밀도를 줄이고 평균 차량 속도를 향상시켜 전체 교통류율을 향상시키는 것으로 나타났다. 그러나 혼잡한 교통류 수준에서는 VSL 또는 RM 제어가 효과적이지 않을 수 있다는 것을 보였다. 본 연구의 결과로 제안된 전략은 고속도로 운영 전략 수립 시 교통류 수준에 따라 차별화된 전략을 적용하여 효율적인 교통류에 기여할 수 있다.

N단 평행 결합 선로를 이용한 90° 광대역 3 dB 결합기 설계

조정훈,윤상원 한국전자파학회 2002 한국전자파학회논문지 Vol.13 No.1

In this paper, we proposed a 3 dB coupler using N-section parallel-coupled lines and designed a very compact one based on the analysis results. The coupled line has been analyzed by spectral domain method. After we obtain the s-parameters of N-section parallel-coupled lines by using port reduction method 4-port s-parameters are derived. The 3 dB couplers, which were fabricated, are not necessary to implement high impedance lines and tight coupling gaps as Lange Couplers because loose coupling is used. To realize a minimum section, we used the PCB that has high a dielectric constant and a thickness. The experimental results show that it has wide bandwidth of about 42 %(0.5 dB unbalance) from 3.6 GHz to 5.5 GHz and phase difference within 1 degree. Also, The isolation characteristics about 15 dB at its pass-band are obtained. 본 논문에서는 N개의 평행 결합선로를 이용한 3 dB 결합기를 해석하였으며, 유도된 식에 의하여 최소의 결합선로 수와 크기로 설계하였다. 기존의 Spectral Domain상에서 N단 평행 결합선로의 4N-port의 산란행렬로부터 port reduction 방법을 사용하여 4-port 산란 행렬을 유도하였으며, 유도된 결과의 타당성을 검증하기 위하여 실제 제작하고 측정하였다. 제작된 결합기는 loose coupling의 평행 결합 선로를 이용하기 때문에 Lange Coupler 와 같은 높은 임피던스와 Tight coupling을 구현할 필요가 없으며, wire bonding포 용이하다. 최소의 단수로 구현하기 위해 높은 유전율과 두꺼운 기판을 사용하여 2단으로 3 dB 구현이 가능함을 제시하였다. 제작결과 3.6 GHz에서 5.5 GHz로 대략 42 %(0.5 dB unbalance) 정도의 광대역 특성을 가지고 위상차도 1$^{\circ}$내외의 결합기를 구현할 수 있었고 격리도 특성 또한 대역 내에서 15 dB 내외의 특성을 보였다.

Application of Interpolation Method to Magnetic Resonance Imaging for Removal of Radio-Frequency Noise

조정훈,조지현,류은경,조장건,오창현,안상두,이철현 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.10