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오스테나이트계 SS배관의 협개선 TIG 용접부 특성 조사
심덕남(Deog-Nam Shim),정인철(In-Cheol Jung) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
Although Gas Tungsten Arc Welding (GTAW or TIG welding) is considered as high quality and precision<br/> welding process, it also has demerit of low melting rate. Narrow-gap TIG welding which has narrow joint width<br/> reduces the groove volume remarkably, so it could be shorten the welding time and decrease the overall shrinkage in<br/> heavy wall pipe welding. Generally Narrow-gap TIG welding is used as orbital welding process, it is important to<br/> select the optimum conditions for the automatic control welding<br/> This paper looks at the application and metallurgical properties on Narrow-gap TIG welding joint of heavy wall<br/> large austenitic stainless steel pipe to determine the deposition efficiency, the resultant shrinkage and fracture toughness.<br/> The fracture toughness depends slightly on the welding heat input.
정인철(In Cheol Jung),정경원(Kyung Won Jung),김성림(Seong Nim Kim),이상훈(Sang Hun Lee) 한국환경보건학회 2000 한국환경보건학회지 Vol.26 No.1
Currently, septic tank in separate houses & flats decompose fecal sewage only by settling and anaerobic digestion. Therefore, decomposing efficiency is lower than the criteria set by government regulations. This study was carried out to ameliorate effluent water quality from septic tanks using madia , which is consisted of wasted fishing net. The septic tanks used in experiments are equipped in flats( villa called in Korean) in Su-yong district of Pusan city. Results of experiments are as follows 1. Biofilm was formed on the surface of media, wasted fish net and the components produced by anaerobic degradation was methane 42%, carbon dioxide 51 % respectively. 2. The effective volume was decreased to 50.0% in the first basin of septic tank at Hanyang villa , 24.0% at Sunmoon by scum and sludge after 8 months operation 3. Compared effluent water quality before and putting media into septic tank, the decreasing rate of effluent TBOD by media was shown 46.3% at Hanyang, 25.8% at Sunmoon(as the blank) and then the decreasing efficency by putting media was calculated to 20.5% 4. In the aspect of recycling wasted fishing net resulting to natural environmental protection and decreasing loading rate of municipal sewage treatment plant, the saved money of plant operation and disposal of wasted fishing net will be summed up to 3 billions won in Pusan.
CAMUS 시스템에서의 가변적인 서비스 라이프 사이클 관리 기법
정인철 ( In-cheol Jung ),서영호 ( Young-ho Suh ),이강우 ( Kang-woo Lee ),김현 ( Hyun Kim ),함호상 ( Ho-sang Ham ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.2
컨텍스크 기반 미들웨어는 응용 도메인에서 실제 상황을 구현할 수 있다. 전형적으로 실제 위치를 환경에 메핑시킴으로서 실제상황을 가변적으로 변화시킬 수 있다. 또한 실제 위치에 센서와 actuator 를 이용한 서비스의 라이프사이클을 원격지에서도 가변적으로 변경할 수 있다. 이 시스템은 CAMUS[1] 시스템에서 라이프 사이클 관리를 OSGi 기반으로 한 내용을 구현하였다. OSGi 는 홈 네트워크 관련 개방형 시스템 게이트웨이 시스템으로서 OSGi 를 이용함으로써 다양한 유비쿼터스 통신, 가정, 컴퓨터 시스템간의 쉽게 라이프 사이클 관리를 할 수 있는 장점이 있다.
전석환,정인철,정상오,윤형로,Jun, Suk-Hwan,Jeong, In-Cheol,Jung, Sang-O,Yoon, Hyung-Ro 대한의용생체공학회 2009 의공학회지 Vol.30 No.2
The ideal method which measures a blood vessel of senility and degree of arteriosclerosis is to measure compliance of arterial and condition of blood circulation at the periphery. In these days vascular stiffness have been assessed by analyzing PTT (pulse transit time) from ECG and PPG. PTT is that between toe and finger each subject estimated through ECG and PPG signals. Two parameters, which are related to PWV, were tested with the time delay between the finger and toe. PWV is a variation of quantity which is associated with vascular stiffness. These researches which use PTT and PWV don't consider the blood vessel characteristic of an individual. In this current research, we have used with the blood vessel characteristic of an individual. That is an assessment of vascular stiffness using the variation of quantity in PWV with the changes of position in the subject. PWV variation increased as functions of the subject's age. The increase of the PWV variation parameters with age is attributed to the direct decrease of the blood vessel compliance with different position. The quantity of variation estimated by experimental results is that old age's (75.78${\pm}$7.75) case is 113.68% and young age's (26.47${\pm}$2.04) case is 85.69%. We proved and presented about estimation of vascular stiffness of possibility by this result.
항암제 유발 말초신경병증 변증평가도구의 신뢰도 및 타당도 평가
박지혜,정인철,이서현,이석훈,최석철,유화승,Park, Ji-hye,Jung, In-chul,Lee, Seo-hyun,Lee, Suk-hoon,Choi, Seok-cheol,Yoo, Hwa-seung 대한한방내과학회 2016 大韓韓方內科學會誌 Vol.37 No.4
Objectives: The purpose of this study was to evaluate the reliability and validity of an instrument for pattern identification and evaluation in chemotherapy-induced peripheral neuropathy (CIPN).Methods: The study consisted of 66 patients with CIPN (visual analog scale ≥30 mm, Eastern Cooperative Oncology Group ≤2). The test-retest reliability of the instrument for pattern identification and evaluation in CIPN was tested twice with the same patients in one week.Results: Pearson’s coefficient test-retest reliability of the instrument was 0.601-0.777. The internal reliability of each part was 0.619-0.811. To confirm the validity of the instrument for pattern identification and evaluation for CIPN, the correlation between the score for each identification pattern and that of other CIPN instruments was analyzed. The results revealed a positive correlation between the Functional Assessment of Cancer Therapy-General and CIPN-20.Conclusion: The reliability of the instrument for pattern identification and evaluation in CIPN was moderate, and the validity analysis revealed a positive correlation.
이윤진(Yoon Jin Lee),윤주희(Joo Hee Yoon),김현영(Hyun Young Kim),권지영(Ji Young Kwon),정인철(In Cheol Jung),류순원(Soon Won Ryu),조현희(Hyun Hee Jo),김진홍(Jin Hong Kim) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.11
N/A Objective : The aim of this study is to improve the pregnancy outcome and evaluate the prognostic factor after McDonald operation of IIOC patients. Methods : From January 1, 1995 to December 31, 1999, 230 cases of IIOC were admitted and treated with McDonald operation at department of Obstetrics and Gynecology, Medical college of Catholic university. Among these patients, 187 cases were analyzed. We classified the above patients into 4 groups by gestational weeks of the operation (1st group before 14weeks, 2nd group 14+1-16weeks, 3rd group 16+1-18weeks, 4th group after 18weeks), and we analyzed the mean age of the patients, parity, indications, operation time, delivery methods and fetal survival rate on each groups. Results : The fetal survival rate was 76.08%, and duration of pregnancy was 21.65 weeks±6.39 in the 1st group, 78.5%, 19.24 weeks±6.367 in the 2nd group, 88.2%, 18.25 weeks±5.15 in the 3rd group, 75.67%, 12.12 weeks±7.19 in the 4th group. The 3rd group shows higher fetal survival rate with significantly. Conclusion : We can have higher fetal survival rate and prolongation of duration of pregnancy in the IIOC patients when we do the McDonald operation in the 16+1-18th gestation weeks.
염증성 사이토카인의 발현 억제를 통한 홍해삼 추출물의 항염증효과 및 아토피 개선효과
전미지(Mi Ji Jeon),임은경(Eun Gyeong Lim),김가연(Ga Yeon Kim),이승제(Seung Jae Lee),정인철(In Cheol Jung),김상용(Sang-Yong Kim),김영민(Young Min Kim) 한국생물공학회 2017 KSBB Journal Vol.32 No.4
The red sea cucumber (RSC), Apostichopus japonicus, is a species of sea cucumber in the family Stichopodidae. It is widely distributed in China, Japan and Korea. Tumor necrosis factor-α (TNF-α) and Interferon (IFN-γ) induce inflammatory cytokines such as Thymus and activation-regulated chemokine (TARC/CCL17), Cutaneous T-cellattracting chemokine (CTACK/CCL27), interleukin-1β (IL-1β), IL-6 and IL-8. These cytokines are increased in atopic dermatitis condition. In this study, we investigated the antiinflammatory and skin regeneration effects by RCS. To investigate cytotoxic effects in HaCaT cells, we performed MTT assay after treatment with RSC extracted by 70% EtOH. As a result, RSC extracts did not have cytotoxic effect in HaCaT cells. Also, mRNA expression levels of CCL17, CCL27, IL-β, IL-6 and IL-8 genes induced by TNF-α/IFN-γ were decreased by RSC extracts. Moreover, we confirmed the release of CCL17 and CCL27 protein through ELISA assay. Wound healing assay and cell cycle assay were performed to identify cell regeneration effect of RSC extracts. These results demonstrated the prevention and treatment effects of RSC on skin inflammatory diseases such as atopic dermatitis.