선각 평블록 조립공장 일정계획을 위한 혼합 유전 알고리즘

하태룡,문치웅,주철민,박주철 한국경영과학회 2000 經營 科學 Vol.17 No.1

This paper describes a scheduling problem of the panel block assembly shop in a shipbuilding industry Because the shipbuilding is a labor intensive industry, the most important consideration in a panel block assembly shop is the workload balancing, which balances man-hour, weight and welding length and so on it should be determined assembly schedule and workstation considering a daily load balancing and a workstation load balancing simultaneously To solve the problem, we develop a hybrid genetic algorithm Hybrid genetic algorithm proposed in this paper consists of two phases The first phase uses the heuristic method to find a initial feasible solution which provides a useful information about optimal solution The second phase proposes the genetic algorithm to derive the optimal solution with the initial population consisting of feasible solutions based on the initial solution Finally, we carried out computational experiments for this load balancing problem, which indicate that developed method is effective for finding good solutions

무배란성 불임환자에 있어서 골반 초음파 추적조사에 의한 Gonadotropin 치료

이두룡,김덕만,조치흠 啓明大學校 醫科大學 1990 계명의대학술지 Vol.9 No.3

Ovarian follicular growth was monitored by ultrasound. Ovulatioin induction in 25 cycles of 13 anovulatory infertility patients were performed. These women were treated with clomiphene citrate, human menopausal gonadotropin(hMG) and human chorionic gonadotropin(hCG) for anovulatry infertility. The amount of gonadotropins administered were based exclusively on the results of the ultrasound examiinations. Twelve pregnancies were obtained. with 12 singletons, resulting in accumulative pregnancy rate about 92.3%. Ultrasoound can be helpful in the determination of the best time for induction of ovulation and effectively to control gonadotropin therapy in the majority of cases.

급성심근경색후 발생한 심실중격결손 2례

김태희,이재호,김애란,허민영,문치숙,정수룡,김대경,김두일,김동수 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.4

Ventricular septal defect remains an infrequent but devastating complication of acute MI. Approximately 1∼3% of cases of acute myocardial infarction are complicated by ventricular septal rupture in the prethrombolytic era and the incidence has decreased to 0.2% with reperfusion therapy. This mechanical complication usually occurs within the first 10 to 14 days when necrotic tissue is most abundant and the collateral coronary circulation is not well developed. This lesion is generally associated with complete coronary obstruction rather than severe stenosis. Rupture of the ventricular septum is a severe mechanical complication of acute myocardial infarction, usually resulting in death unless surgical repair is performed. The bad prognosis of this event within the first 2 weeks indicates the need for early surgical rapair. This complication is more frequent after the first acute myocardial infarction in the elderly and secondary to a transmural myocardial infarction. We report two cases of ventricular septal rupture after acute myocardial infarction.

Application of Subirrigation Using Capillary Wick System to Pot Production

Chi-Won Lee,In-Sup So,Sung-Woo Jeong,Moo-Ryong Huh 경상대학교 농업생명과학연구원 2010 농업생명과학연구 Vol.44 No.3

Alternative subirrigation way, capillary wick system (CWS) was tested to reduce labor cost, waste water, contamination of ground water, and use of fungicide compared to overhead irrigation system (OIS). CWS helped reduce remarkably the working hours for watering from 4 hours in OSI to just 5 minutes. Labor cost was saved 98% in CWS compared to OIS. By the physical characteristics of various growing media, 1 coconut coir+2 perlite (v/v) mixture was selected because it had an ideal distribution of three phase, e.g. 1 solid: 1 liquid: 2 gas phase. Medium mixture containing scoria had so high bulk and particle density to hurt root. In bark-containing medium, the liquid phase and the percent saturation of liquid phase with time elapsed was lower than that of other mixture. It meant that the mixture contained very low level of water. Application of CWS for cyclamen pot production played an important role in reducing the incident of fusarium wilt symptom from 18% in conventional over watering system to 4%. Cyclamen pot irrigated by capillary wick had shorter petiole and more leaves than those by overhead watering. As a result, this system was highly beneficial to get uniform pot products with high quality. It improved water and nutrient solution efficiency relative to conventional overhead irrigation system (OIS).

Enhanced Germination of Echinacea angustifolia Seed with Ethephon and Sodium Hypochlortie Treatment

Chi-Won Lee,In-Sup So,Sung-Woo Jeong,Moo-Ryong Huh 경상대학교 농업생명과학연구원 2010 농업생명과학연구 Vol.44 No.3

The influence of sodium hypochlorite and ethephon on the germination of narrow-leaved purple coneflower (Echinacea angustifolia) was investigated. Treatment of seeds with ethephon (1 mM) for 2 h followed by soaking in 0.525% sodium hypochlorite greatly increased germination (>90%). The treatment of seed with a combination of sodium hypochlorite and ethephon shortened number of days required to reach 50% of the final germination (T₅₀) from 4.2 days in control to 1.1 days. Seedlings grown from ethephon-treated seeds had shorter and thicker hypocotyls and roots with higher dry weights compared to the control. The same trend was observed during seedling emergence from soil. Ethephon treatment longer than 2 h resulted in weaker seedlings, probably due to leaf senescence. Anthocyanin content in seedling leaves increased linearly from 0.04 mg/g fresh weight in control to 3.72 mg/g fresh weight in 24 h treatment as the time of seed exposure to ethephon increased. Seed treatment with bleach and ethephon may well be practiced to facilitate the establishment of E. angustifolia in the field.

농산물 가격 책정방식에 따른 소비자 잉여 비교분석 :

김치운(Chi un Kim) 양승룡(Seung Ryong Yang) 한국농식품정책학회 2017 농업경영정책연구 Vol.44 No.2

Consumer cooperatives usually adopt the fixed price policy for highly price volatile agricultural products. Economic theories suggest that consumers are better off when the market prices are high due to short supply or strong demand. However, consumers often complain about the fixed price policy when the market prices are low and stable. The objective of this study is to analyze which is more beneficial between floating pricing policy and fixed pricing policy for consumers in terms of the welfare perspective. For this, we conduct a Monte Carlo simulation and compare consumer surpluses from both pricing policies. The results show that the fixed prices provide higher welfare for consumers, as the economic theory suggests. The risk premium to accept the floating prices is estimated around 7 percent for the sample products. The results give some implications about the value of the government policies for price stability.

환자들이 사용하고 있는 안경의 정확도에 대한 관찰

김기룡, 지선득, 이종원 ( Kie Ryong Kim, Sun Duk Chi, Jong Won Lee ) 대한안과학회 1976 대한안과학회지 Vol.17 No.4

Vertical Handoff Decision System based on Support Vector Machine

Ryong Oh(오룡),Jaehak Yu(유재학),Tae-sub Kim(김태섭),Chi-Hun Lim(임치헌),Seung-Wan Ryu(류승완),Choong-Ho Cho(조충호) 한국통신학회 2011 韓國通信學會論文誌 Vol.36 No.7

Comparisons of Practical Performance for Constructing Compressed Suffix Arrays

박치성(Chi Seong Park),김민환(Min Hwan Kim),이석환(Suk Hwan Lee),권기룡(Ki Ryong Kwon),김동규(Dong Kyue Kim) 한국정보과학회 2007 정보과학회논문지 : 시스템 및 이론 Vol.34 No.5·6

써픽스 배열은 기본적인 전체 텍스트 인덱스 자료구조로서, 반복되는 패턴 질의 수행 시 효율적으로 사용될 수 있다. 유용한 전체 텍스트 인덱스 자료구조들이 많이 제안되어왔음에도 불구하고, O(nlogn)-비트 공간을 필요로 하는 공통적인 문제점으로 인하여 보다 효율적으로 공간을 사용할 수 있는 방법에 대한 필요성이 요구되었다. 하지만 기 개발된 압축된 써픽스 배열이나 FM-인덱스와 같은 것들 또한 이미 존재하는 써픽스 배열에서부터 구축되어야 하기 때문에 실제적인 사용 공간을 줄일 수는 없었다. 최근, 써픽스 배열을 구축할 필요 없이 텍스트로부터 직접 압축된 써픽스 배열을 구축할 수 있는 두 가지 알고리즘들이 제안되었다. 본 논문에서는 실험을 통해 자료구조 구축 시간과 구축 시 필요로 하는 최대사용 공간, 구축이 끝난 후 최종 자료구조의 크기 등을 측정함으로써 이 두 가지 압축된 써픽스 배열 구축 알고리즘과 기존의 써픽스 배열들과의 실제적인 성능을 비교한다. Suffix arrays, fundamental full-text index data structures, can be efficiently used where patterns are queried many times. Although many useful full-text index data structures have been proposed, their O(nlogn)-bit space consumption motivates researchers to develop more space-efficient ones. However, their space efficient versions such as the compressed suffix array and the FM-index have been developed; those can not reduce the practical working space because their constructions are based on the existing suffix array. Recently, two direct construction algorithms of compressed suffix arrays from the text without constructing the suffix array have been proposed. In this paper, we compare practical performance of these algorithms of compressed suffix arrays with that of various algorithms of suffix arrays by measuring the construction times, the peak memory usages during construction and the sizes of their final outputs.

고추 탄저병균에 대한 옻나무 추출물의 항진균 효과

송치현 ( Chi Hyoun Song ),정종배 ( Jong Bae Chung ),정병룡 ( Byoung Ryong Jeong ),박세영 ( Se Young Park ),이용세 ( Yong Se Lee ) 한국환경농학회 2012 한국환경농학회지 Vol.31 No.1

BACKGROUND: Anthracnose disease caused by Collectotrichum spp. is one of the most important worldwide devastating diseases in red pepper plants. Fungicides using plant extracts have several advantages, compared to synthetic chemical fungicides, because they are naturally occurring compounds, are usually safe for agricultural environment and are used for producing highly valuable agricultural products. Efforts for seeking an anti-fungal activities using naturally occurring compounds were mostly conducted from medicinal plant extracts. Sap of Rhus verniciflus was known to have healing effects on several human diseases. Recently, the extracts of Rhus verniciflus were actively tested for anti-cancer, anti-oxidative, and anti-fungal effects. In this study, the extract of Rhus verniciflus was tested for anti-fungal activity against Colletotrichum spp., which cause anthracnose in red-pepper. METHODS AND RESULTS: After neutralizing extracts of Rhus verniciflus (urushiol contents 70%) with autoclave, the crude extracts were used to investigate inhibitory effects for mycelial growth and spore germination of Colletotrichum spp. on PDA media. The mycelial growth and spore germination of Colletotrichum spp. were inhibited 18-39% and over 50% in response to crude extract of R. verniciflus (1.0 mg/mL). After spraying the extracts at the same concentrations above and then artificially inoculating Colletotrichum spp. on blue and red-pepper fruits, in vitro inhibition effects were examined. At 1.0 mg/mL, the crude extract of R. verniciflus showed inhibition activity in anthracnose incidence on blue- and red-pepper as 68.1-75.0%, through a artificial inoculation of Colletotrichum spp. in a laboratory. For in vivo inhibitory effects, the extracts (1.0, 0.1, and 0.01 mg/mL) were treated on red-pepper plants grown in green house 3 times at the interval of 1 week. Then inhibitory effects were determined by counting diseased fruits at 1 week after final treatment. The incidence of anthracnose was inhibited over 60% in the greenhouse by treatment of crude extract of R. verniciflus (1.0 mg/mL). CONCLUSION(s): Extracts of Rhus verniciflus were shown to have inhibitory effects on mycelial growth, spore germination of Colletotrichum spp. in vitro and on occurrence of anthracnose on pepper fruit in green house.