APPLICATION OF TRAVELING SALESMAN PROBLEM(TSP) FOR DECISION OF OPTIMAL PRODUCTION SEQUENCE

Chang, Kun Soo,Yeo, Yeong Koo,Chang, Jin Yang,Kim, Kil Su,Jeong, Eun Young,Oh, Sea Cheon 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.5

In the present study a reliable and structural decision system for production sequence of polymeric products is developed. Minimization of the amount of off-specs are the main objective in the decision of production sequence to maximize profit. Off-specs are generated when the production sequence of polymeric products is changed. The amount of off-specs depends on changes of product grades. In the present study we applied the traveling salesman problem (TSP) to achieve optimal decision of production sequence. To solve the optimal decision problem formulated by TSP, we employed three different approaches such as Branch and Bound (B&B) method. Dynamic Programming (DP) method and Hopfield Neural Network (HNN) method. Production sequences computed based on the actual plant off-spec data were compared with the sequences employed in the actual plant operation. From the comparison the decision method proposed in the present study showed increased profits and reduced off-specs.

Short Communication : Application of Traveling Salesman Problem (TSP) For Decision of Optimal Production Sequence

( Eun Young Jeong ),( Sea Cheon Oh ),( Yeong Koo Yeo ),( Kun Soo Chang ),( Jin Yang Chang ),( Kil Su Kim ) 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.5

In the present study a reliable and structural decision system for production sequence of polymeric products is developed. Minimization of the amount of off-specs are the main objective in the decision of production sequence to maximize profit. Off-specs are generated when the production sequence of polymeric products is changed. The amount of off-specs depends on changes of product grades. In the present study we applied the traveling salesman problem (TSP) to achieve optimal decision of production sequence. To solve the optimal decision problem formulated by TSP, we employed three different approaches such as Branch and Bound (B&B) method. Dynamic Programming (DP) method and Hopfield Neural Network (HNN) method. Production sequences computed based on the actual plant off-spec data were compared with the sequences employed in the actual plant operation. From the comparison the decision method proposed in the present study showed increased profits and reduced off-specs.

통계분석법을 이용한 영산강 유역의 수질평가

정희정 ( Hee Jeong Jeong ),허유정 ( Yu Jeong Huh ),이영재 ( Yeong Jae Lee ),김갑순 ( Kap Soon Kim ),유창석 ( Chang Seok Yoo ),임병진 ( Byung Jin Lim ) 한국물환경학회 ( 구 한국수질보전학회 ) 2010 공동 추계학술발표회 Vol.2010 No.-

네트워크 텍스트 분석방법을 이용한 방과후학교 연구동향 분석

장창성(Jang, Chang Sung),배상훈(Bae, Sang Hoon),정영모(Jeong, Yeong Mo),김재형(Kim, Jae Hyeong) 한국방과후학교학회 2017 방과후학교연구 Vol.4 No.1

본 연구는 방과후학교 연구동향을 분석하고, 향후 연구과제와 방향에 대한 시사점을 제공하는데 목적이 있다. 한국교육학술정보원의 ‘학술연구정보서비스’를 이용하여 2004년부터 2016년 까지 방과후학교를 주제어로 하는 학술지 논문을 분석대상으로 하였으며, 분석대상 논문들의 연구주제, 연구방법, 연구대상을 빈도분석하고, NetMiner 5.0 프로그램을 사용하여 주제어에 대한 네트워크 텍스트 분석을 실시하였다. 주제어 분석은 정책 변동을 기준으로 시기별로 나누어 제시하였다. 빈도분석 결과 양적연구, 서술적연구, 질적연구, 혼합연구 순으로 다양한 연구가 이루어지고 있음을 발견할 수 있었다. 시기별로는 확산기(2004~2007)에 초등 돌봄 주제를 중심으로 하는 연구가 많았으며, 조정기(2008~2010)에 사교육관련 주제의 연구가 많았다. 내실화기(2011년 이후)에는 초등학교, 방과후학교 참여, 운영실태, 사교육, 학업성취 등을 주제로 하는 다양한 연구가 진행되었다. 연구결과를 종합해 보면 방과후학교 관련 연구가 연구 주제, 내용, 방법 측면에서 점차 다양해지고 활발해지고 있었다. 향후 연구방향에 대한 시사점으로 2008년 이후 방과후학교 정책 사업이 시도교육청으로 이양된 이후 학교 현장에 나타난 변화와 방과후학교 프로그램의 질 관리를 위한 연구 등에 대한 필요성을 제시하였다. The study aims to analyze the trends of after school research and to provide implications for future research tasks and direction. Using the Research Information Sharing Service of Korea Education & Research Information Service , we analyzed the academic papers with after school from 2004 to 2016. The research subjects, research methods, and subjects of the research articles were analyzed frequency and network texts analysis of the keywords using NetMiner 5.0 program. Key word analysis is divided by period according to policy change. As a result of frequent analysis, it can be found that various studies are conducted in the order of quantitative research, descriptive research, qualitative research, and mixed research. There were many studies focusing on primary care topics in the diffusion periods(2004~2007) and many researches on private education subjects in the adjustment periods(2008~2010). Various studies were conducted on subjects such as elementary school, after-school participation, operation, private education, and academic achievement in the strengthening period(since 2011). According to the results of the study, after-school researches have been increasingly diversified in terms of research subjects, contents and methods. This study suggests the necessity of research on the change of school after the after-school policy has been transferred to the school site since 2008. Also, it suggested the necessity of research for quality management of after-school program.

원문 : 좌업 시간과 알코올 섭취가 30대 남자 사무직 근로자의 혈압과 혈관탄성에 미치는 영향

조봉오 ( Bong Oh Cho ),이인녕 ( In Yeong Lee ),정균근 ( Gyun Geun Jeong ),장창현 ( Chang Hyun Jang ) 한국운동생리학회(구 한국운동과학회) 2014 운동과학 Vol.23 No.3

조봉오, 이인녕, 정균근, 장창현. 좌업 시간과 알코올 섭취가 30대 남자 사무직 근로자의 혈압과 혈관탄성에 미치는 영향. 운동과학, 제23권 3호, 241-248, 2014. 본 연구의 목적은 일과 중 대부분을 좌업근무 형태로 업무를 수행하고, 스트레스로 인해 음주가 잦고, 운동이 부족한 30대 남자 사무직 음주자 15명을 대상으로 좌업 시간과 알코올 섭취가 혈압과 혈관탄성에 미치는 영향을 분석하여 사무직 근로자에게 건강관리에 필요한 정보를 제공하는데 있다. S대학 운동 생리학 실험실에서 사전 인적 사항과 설문을 작성하고, 신장, 체중, 채혈, 혈압, 혈관탄성, BMI를 측정하였다. 알코올 섭취 횟수, 섭취량, 좌업 시간, 그리고 음주 섭취 전과 후 및 시간대별 (10분, 40분, 60분) 혈압과 혈관탄성의 변화를 측정 분석한 결과를 요약하면 다음과 같다. 1) 평균 좌업시간이 9.87시간, 음주횟수 및 음주량은 월 평균 9.13회와 12.47잔 이였다. 2) 알코올 섭취횟수 및 섭취량에 따른 BMI, TC, LDL-C, HDL-C, 혈압과 혈관탄성 비교에서 알코올 섭취횟수에서 좌상지 혈관탄성은 통계적으로 유의한 차이를 나타냈다(p<.05). 3) 알코올 섭취 전, 후 비교 분석 결과 우상지와 좌상지의 혈관탄성에서 통계적으로 유의한 차이가 나타났다(p<.05). 4) 알코올 섭취 후 시간대별 우상지 혈관탄성은 통계적으로 유의한 차이를 나타냈다(p<.05). 이상의 결과를 종합해 볼 때, 좌업 시간이 혈압과 혈관탄성에 미치는 영향은 통계적으로 유의하게 나타나지 않았고, 알코올 섭취는 혈관탄성에 통계적으로 유의한 차이를 나타냄을 알 수 있었다. 따라서 이는 직장생활의 스트레스를 음주로 해소하는 경향이 있음을 보여주며 건강에 부정적인 영향을 주고 있음을 알 수 있었다. 또한, 신체가 음주에 적응되어 실험 시 섭취한 적은 양(1/2병)은 1회 12.47잔에 비해 혈압과 혈관탄성에 큰 영향을 미치지 못한 것으로 사료된다. Cho, Bong-Oh, Lee, In-Yeong, Jeong, Gyun-Geun, Jang, Chang-Hyun. Effects of Sedentary Occupation Time and Alcohol Intake on Blood Pressure and Vascular Compliance in 30s Male White-Collar Workers. Exercise Science, 23(3): 241-248. 2014. The purpose of this study was to examine effects of duration of sedentary office work and alcohol intake on blood pressure and vascular compliance in male subjects who were office workers aged between 30 to 39 and frequently drink alcoholic beverages to cope with their stress without exercising for health. The study was to provide health-related information necessary for white-collar workers. We collected data of demographic information, height, weight, blood sample, blood pressure, vascular compliance, and BMI from 15 subjects in S University`s Exercise Physiology Laboratory, and analyzed the frequency and amount of alcohol intake, duration of sedentary work, and changes in blood pressure and vascular compliance at diffident time points (10, 40, and 60 minutes post drinking) from baseline. I t was found that the average time of sedentary work was 9.87 hours, drinking 9.13 times a month on average, 12.47 glasses of alcohol beverages per drink. In comparison of BMI, TC, LDL-C, HDL-C, blood pressure and vascular compliance upon the frequency and amount of alcohol intake, the upper left limb`s vascular compliance had a statistically significant difference (p<.05). In the result of the comparative analysis of pre-and post-drinking, vascular compliance was significantly different in the upper right and left limbs (p<.05). Vascular compliance in the upper right limb after drinking significantly changed (p<.05). As a result, the duration of sedentary work had no statistically significant difference in blood pressure and vascular compliance. T he vascular compliance after drinking h ad a statistically significant difference. This suggested that the result was an index that shows the trend of the office workers releasing their work stress by drinking alcoholic beverages, and that drinking had negative impacts on them. In addition, a small amount of intake (a half bottle) at the test time, after the body was adjusted to drinking, compared with 12.47 glasses per intake, had no great impacts on blood pressure and vascular compliance.

Pulmonary Inflammatory Pseudotumor with Solitary Plasmacytoma of Bone Mimicking Advanced Lung Cancer

( Chang Hoon Kim ),( Jae Seok Jeong ),( Yong Chul Lee ),( So Ri Kim ),( Yeong Hun Choe ),( Seung Yong Park ) 대한결핵 및 호흡기학회 2020 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.128 No.-

Lung cancer has been the most commonly diagnosed type of cancer and the leading cause of cancer related mortality in Korea and worldwide. Although it is fatal, most of the lung cancer patient are asymptomatic at the time of diagnosis. Therefore, radiologic screening by chest low-dose computerized tomography (LDCT) has been recommended by lung cancer specialists for early detection and improving survival. However, clinical suspicion of lung cancer by radiologic screening is quite challenging because of its high false positive rate. A wide range of benign pulmonary diseases could be misinterpreted as lung malignancy on LDCT, including infection, benign mass-forming lesion, and inflammatory changes. Therefore, physician should consider the possibility of the benign disease entities when radiologic features suggest lung malignancy. Herein, we report a case of a 50-year-old man presenting a 4.5-cm lung mass in the right upper lobe with solitary osteolytic lesion of the right 8th rib. Under the suspicion of metastatic lung cancer, the lung mass and the right 8th rib were surgically resected for the diagnostic and curative purpose. After the tissue biopsy, unexpectedly, the lung mass was diagnosed as inflammatory pseudotumor. Furthermore, histopathology of the resected rib showed solitary plasmacytoma of the bone. Our experience highlights the importance of clinical suspicion that in patients with radiologic features compatible to advanced lung cancer could be caused by coexistence of unrelated two uncommon disease entities, which can be completely treatable with surgical resection.

[논문]억지말뚝을 이용한 자립식 흙막이 공법의 해석기법 개발

권정근,임종철,김창영 釜山大學校生産技術硏究所 2008 生産技術硏究所論文集 Vol.67 No.-

억지말뚝을 이용한 자립식 흙막이 공법은 많은 실험과 현장적용을 통해 경제적이며 효율적인 공법으로 입증되었다(김,2006). 그러나 지반공학적인 이론적 확립이 되어 있지 않았다. 이에 이론적인 해석기법의 개발을 위해 실제 시공여건을 반영한 단계굴착을 통한 실내모형실험이 수행되었다. 본 연구에서는 단계굴착에 따른 흙막이 벽체 및 억지말뚝의 거동과,단계굴착에 따른 흙막이 벽체와 억지말뚝에 작용하는 토압과 응력을 분석하였다. 그 결과를 바탕으로 지반의 파괴 메카니즘을 제안하였으며 연결부,엄지말뚝,억지말뚝의 해석기법을 개발하였다.

형질전환 제초제저항성 벼 밀양 204호의 농업적 특성

정응기,이기환,원용재,박향미,전남수,최준호,구연충,한창덕,은무영,김태산,남민희 Plant molecular biology and biotechnology research 2005 Plant molecular biology and biotechnology research Vol.2005 No.

This study was conducted to investigated the major characteristics of genetically modified rice of "Milyang 204" originated from Dongjinbyeo compared to a non-transgenic rice varieties Dongjinbyeo and Junambyeo. Basta resistant transgenic rice lines carrying bar gene produced by the Yeongnam Agricultural Research Institute were evaluated for their agronomic characters. The transgenic Japonica rice of "Milyang 204" showed inferior phenotypic traits compared to a non-transgenic rice variety Dongjinbyeo and Junambyeo. On the basis of UPOV (Union Internationale Pour la Protaection des Obtentions Vegetables) and NSMO(National Seed Management Office) the transgenic "Milyang 204" showed difference in some traits out of some agronomic traits, such as leaf color, angle of flag leaf, number of spikelets, culm length, white core and white belly compared to the nontransgenic varieties rice.

치핵의 보존적 치료

장정환,김정용,주영화 조선대학교 1994 The Medical Journal of Chosun University Vol.19 No.1

This study was undertaken to evaluate the effectiveness of the conservative treatment of hemorrhoid, especially warm sitz bath and anal antihemorrhoidal suppositories, on the basis of answering the questionnaires given the 55 hemorrhoidal patients who were performed hemorrhoidectomy at Department of surgery, Chosun University and Hak Moon Surgical Clinic from Jan, 1994 to May 1994. The results are summerized briefly as follows : 1. Except 9 cases(18%), 46 cases(82%) experienced sitz and/or suppositories, Among them, 20 cases(40%) used above both methods, 19 cases(38%) made use of only sitz bath and 7 cases (14%) use of anal suppositories. 2. The effects of sitz bath are pain relief in 14 cases(35%), decreased discharge in 9 cases(23%), relief of itching in 6 cases(15%) and decreased size of hemorrhoidal mass in 5 cases(13%). 3. The reasons of using the antihemorrhoidal suppository are prolapse(15%), bleeding(29%), pain (38%), discharge(12%) and itching(7%). The effects of antihemmorrhoidal agents are varied but excellent and good group are 16 cases(62.9%). Toxic effects of antihemorrhoidal agents were not found on this study.

흉요추에 발생한 Aspergillosis 치험 1례

박시용,김규홍,이운기,최정훈,이인창,배상도 대한신경외과학회 1998 Journal of Korean neurosurgical society Vol.27 No.12