AHP를 활용한 도시가스 산업시설의 안전진단평가표 개발에 관한 연구

양광모,전현정,강경식,Yang Kwang Mo,Jun Hyun Jong,Kang Kyong Sik 대한안전경영과학회 2004 대한안전경영과학회지 Vol.6 No.4

Safety diagnostic indicator pointer can divide by greatly two. One is management (Software) side that one that differ with mechanical (Hardware) side that handle laying stress on equipment connected with safety manages organization and management connected with safety. Weight appropriates according to specific gravity that relevant element occupies in facilities. To give so big value in particular element in grant of weight pays attention because break balance of whole guideline and should gives. Finally, efficient safety net may see effect before self-regulation inside by minimum target establishment using AHP by government and legal, systematic countermeasure establishment for this, strict law application and each business proprietor and though activity and user's active safety activity forms harmony properly.

Multiple Daily Fractionated RT for Malignant Glioma

양광모(Kang Mo Yang),장혜숙(Hye Sook Chang),안승도(Seoung Do Ahn),최은경(Eun Kyung Choi) 대한방사선종양학회 1994 Radiation Oncology Journal Vol.12 No.2

본 연구는 1989년 1월부터 악성성상세포종과 다형성 교아종에 대해 시행된 방사선 치료에 다분할 방사선 치료와 단순분할 방사선 치료와 단순분할 방사선 치료에 대한 효과를 비교하고 이들 뇌종양의 방사선 치료후 예후에 영향을 미치는 인자를 확인하기 위해 시행되었다. 뇌간의 교종 환자를 제외한 전체 43명의 환자는 조직학적으로 악성성상세포종과 다형성교아종으로 확인되었고, 모두 방사선치료를 받았다. 환자는 일반적으로 알려진 예후인자인 연령, 성별, 수행늘역, 조직학적 형태, 종양의 절제정도에 따라 분류하였다. 정위적 조직 생검만 시행한 경우는 13명으로 다분할 방사선 치료군과 단순분할 방사선 치료군에서 각각 8명, 5명이었고 개두술에 의해 종양절제술을 받은 경우는 30명으로 다분할 방사선 치료군과 단순분할 방사선 치료군에서 각각 6명, 9명이었고 다형성교아종은 26명으로 다분할 방사선 치료군과 단순분할 방사선 치료군에서 각각 16명, 10명이었다. 수행 능력이 70미하인 경우는 8명으로 다분할 방사선 치료군과 단순분할 방사선 치료군에서 각각 4명이었으며 대부분이 수행능력 70이상이었다. 50세 이상인 경우 26명이었고 50세 이하인 경우가 18명이었다. 환자의 중앙연령은 52.5세이고, 범위는 2에서 78세였다. 방사선 치료는 1989년 1월부터 1991년 12월까지 단순분할 방사선이 19명의 환자에게 시행되었고 1992년 1월부터 1993년 1월까지 24명의 환자에서는 다분할 방사선 치료가 시행되었다. 단순분할 방사선치료는 종양부위에 하루 일회 1.8Gy씩 조사되어 7주에 걸쳐 총 63Gy가 조사되었다. 그리고 다분할 방사선 치료는 종양 부위에 1.6Gy씩 1일 6시간 간격으로 2회씩 조사하여 4주에 걸쳐 총 64Gy가 조사되었다. 중앙추적 관찰기간은 9개월이었고 범위는 7개월부터 4년이었다. 전체 환자의 중앙생존 기간은 9개월 이었고 단순분할 방사선 치료군과 다분할 방사선 치료군에서 각각 9개월, 10개월 다형성 교아종과 악성성상 세포종에서 각각 10개월 9.5개월 이었다. 방사선 조사방법에 따른 비교와 조직학적 형태에 따른 비교에서 의미있는 통계적 차이는 발견할 수 없었다. 컴퓨터 단층촬영이나 핵자기 공명촬영으로 추적 관찰이 가능했던 36명의 환자에서 질병의 상태를 평가하였으며 다분할 방사선 치료군에서 21명중 4명이 무병상태로 생존해 있었고 단순분할 방사선 치료군에서는 13명중 무병상태로 생존한 환자는 없었다. 20명의 환자에서 질병이 진행되거나 재발하였는데 이들중 8명은 방사선이 조사되지 않은 새로운 부위에서 재발하였다. 본 연구에서는 일반적으로 예후 인자로 알려진 연령, 수행능력, 조직학적 형태, 종양의 절제정도가 예후에 영향을 미치는 지를 확인할 수 없었다. 본 연구에서 추적기간이 짧기 때문에 정확한 결론을 도출하기 어려우나 고등급 교종에서 다분할 방사선 치료 방법으로 1.6Gy씩 1일 2회로 총 64Gy 조사는 단순분할 방사선 치료방법에 의한 결과보다 더 나은 결과를 보여주지는 못하였다. 그러나 단순분할 방사선 치료와 비교해서 치료에 큰 장애 없이 치료기간을 약 3주 정도 단축시킬 수 있었다. 정확한 결론을 얻기위해 지속적인 추적관찰이 필요하며 치료결과를 향상시키기 위하여 방사선 조사 방법에 있어서 총 방사선량, 1회 방사선 조사량의 조정을 고려한 연구가 필요하며 총 방사선량을 증가시키는 한 방법으로 다분할 방사선 치료와 감마 나이프나 침입형 근접치료를 병용하는 방법도 고려될 수 있겠다. Since Jan. 1992. authors have conducted a pilot study to treat malignant glioma with multiple daily fractionated(MDF) radiation therapy and this paper presents the outcome compared MDF to conventional factionated(CF) radiation therapy. Between Sep. 1989 and Jan. 1993, forty three patients with high grade glioma of brain except brain stem glioma were treated: nineteen patients were treated with CF radiation therapy and 24 patients were treated with MDF radiation therapy. In CF radiation therapy, total dose was 6300cGy/35fx in 7 weeks, which 5040cGy was delivered to the initial target volume and 1260cGy to reduced target volume. And in MDF radiation therapy, total dose was 6400cGy/40fx in 4weeks, which 3200cGy was delivered to the initial target volume as 106cGy 2 times daily 6hr apart. All patients had histologically confirmed anaplastic astrocytoma(AA) of glioblastoma multiforme(GBM) with stereotactic biopsy ro craniotomy for subtotal or gross tumor resection. The range of follow-up was 7 months to 4 years with a median follow-up of 9 months. The Median survival form surgery was 9 months for all patients. The median survival was 9 months and 10 months for MDF group and CF group and 10 months and 0.5 months for glioblastoma multifrome and anaplastic astrocytoma respectively. In 36 patients with follow-up CT scan or MRI scan disease status was evaluated according to treatment groups. Four patients(GBM:3, AA:1) of 21 patients in MDF group were alive with no evidence of disease while none of patient was alive with no evidence of disease in CF group. The grogression of disease had occurred in 20 patients. 11 patients and 9 patients in MDF group and CF group respectively. All of these patients showed in-field progression of disease. Four of 11 patients (27%) in MDF group showed the new leasion outside of the treatment field while 5 of 9 patients(56%) in CF group. In our study the prognosis was not influenced by age, KPS, grade, extent of surgery and different fractional scheduled radiation therapy. Authors concluded that MDF regimen was well tolerated and shortened the treatment period from 7 weeks to 4 weeks without compromising results. We believe that further follow-up is needed to assess the role of MDF.

SCM(Supply Chain Management) 환경 하에서의 물류관리 개선에 관한 연구

양광모(Yang Kwang-mo),전갑성(Jeon Gab-seong),강경식(Kang Kyong-sik) 한국산업경영시스템학회 2002 한국산업경영시스템학회 학술대회 Vol.2002 No.추계

The goal of company is to pursue the profit, and the company wants that the service and product are available at the place where it"s customers want. In this regard, the newly focused SCM makes reducing the expenses of whole logistic available by cutting down the expenses of materials, transportation and stock and also, it allows the company to cut down the procurement expense through the reduced lead-time and rationalize producing plans by eliminating the uncertain orders and fluctuation in procurement. It further more optimizes the efficiency of over all productions by meeting the dead line for delivery to the customers. In the recent environment of globalization where fierce competitions exist between manufacturers, SCM plays important role in the strategies of companies, and managements of companies try their best efforts in establishing the strategy to accomplish the innovative relationship between supply chain channels. Therefore, in this study, we try to suggest the model of consolidated logistics system that is ISCM with suggesting the better way of logistics through SCM and comparative analysis with logistics system in advanced countries to resolve the difficulties numbers of companies face after realizing what SCM is in Korea.

고객 클러스터링 기법을 활용한 할당규칙의 시뮬레이션 연구

양광모(Kwang-Mo Yang),박재현(Jae-Hyun Park),강경식(Kyong-Sik Kang) 한국산업경영시스템학회 2006 한국산업경영시스템학회지 Vol.29 No.1

The potential needs as well as visible needs of customer should be considered in order to research and analyze of the customer data. The methods to analyze customer data is classified into customer segmentation, clustering analysis model, forecasting customer response probability model, analysis of the customer break rate model and new customer analysis model by the purpose. In this study, we developed the CW-CLV (Correlation Weight Customer Lifetime Value)method that used AHP(Analytic Hierarchy Process)rule for enhance the reliability of customer data and quantitative analysis of the customer segmentation, based on CLV(Customer Lifetime Value). We suggest to new variables and methodology from determined CW-CLV coefficients, because all of companies respect to the diversified customers classification and complexity of consumers needs. Finally, we unfolded any company"s scheduling added new methodology using simulation and leaded conclusion about the new methodology.

PSM 제도를 활용한 건설업 안전점검 평가방법 개발에 관한 연구

양광모(Kwang Mo Yang),전현정(Hyun Jung Jun),강경식(Kyong Sik Kang) 한국산업경영시스템학회 2003 한국산업경영시스템학회지 Vol.26 No.3

As domestic buildings have been large-scaled, diversified and high-rise, there have been a consistent demand for design, development of construction technology and accident prevention activity as well as quality enhancement. In spite of governmental and related institutions' efforts for reducing national losses which come from numerous accidents, there have been endless small and large accidents on the construction site and thus, it is urgent to conduct empirical researches in this area. Currently safety supervision system in construction industry has enforced harm and danger prevention planning system, however it merely stick to other existing materials. In addition, it is difficult to put it into practice in that it requires bearing too much burden to draw out the planning itself in a case of large construction work. Consequently in this paper we select evaluation criteria by construction progress, classify into several categories, and regard potential danger which often occurs, as a evaluation criterion. Further step is to allow workers or collaborated companies to express their expert opinions or experiences and to encourage quality and process control and autonomous safety control by applying PSM(Process Safety Management) method using AHP(Analytic Hierarchy Process) and to development of PSM evaluation method in the construction. The reason why PSM method should be quantitative and substantial progress is because it contributes Korean constructing companies to enhancing their safety control ability and to taking an equal stance just like developed countries, thereby strengthening their competitive edges. Boost of safety control system by PSM method could make an enormous contribution to preventing construction accidents on the site by establishing and securing an autonomous safety control system.

AHP를 활용한 CRM 문제점 분석에 관한 연구

양광모(Yang Kwang-mo),오동진(Oh Dong-jin),강경식(Kang Kyong-sik) 한국산업경영시스템학회 2002 한국산업경영시스템학회 학술대회 Vol.2002 No.추계

Recently, companies are currently focusing on making huge investments in both time and money on CRM by which they can generate profits through establishing long term relationship with customers while understanding customers" propositions by gathering and analyzing information on customers. But, CRM has many problems that make companies confused. Yet, this phenomenon can be regarded as an interim one. In fact, some cases that successfully introduced CRM show that CRM is migrating from small scale which is typical when introduced to larger scale through various tests. Therefore, this study tries to grasp common problems which most companies utilizing CRM are facing and present solutions to such problems in utilizing CRM. For these purposes, we try to determine the most important and most urgent factors in CRM utilization by using AHP, one of the Multi-criteria decision-making methods proposed by Satty. AHP is widely used for determining relative magnitude per evaluation item, i. e. priority on problems and is expected to make more systematic and objective evaluations than conventional methods do. Even in the present situation where any general criterion on CRM dose not exist, utilization of CRM is expected to be actively continued, which will cause many problems. In this regard, evaluating CRM counts. This study also tries to present a model applicable to such CRM evaluations.

TPM 개선을 위한 설비정보시스템 설계

양광모(Kwang-Mo Yang),전현정(Hyun-Jong Jun),최성희(Sung-Hee Choi),강경식(Kyong-Sik Kang) 한국산업경영시스템학회 2005 한국산업경영시스템학회 학술대회 Vol.2005 No.춘계

TPM(Total Productive Management) that is enforcing introducing more than 80% in domestic manufacturing industry is using total plant efficiency by the evaluation index, and as a result, can see a lot of examples that plant productivity is increased. This study"s purpose centers total productive management activities that is management system for total plant efficiency"s maximization, plant information system that total productive management activities factor that is enforcing in manufacturing industry can develop evaluation model that can evaluate qualitative activities by quantitative activities in process that maximize total plant efficiency wishes to do design.

모듈생산시스템에서의 가중 혼합 할당규칙 연구

양광모(Kwang-Mo Yang),박재현(Jae-Hyun Park),강경식(Kyong-Sik Kang) 한국산업경영시스템학회 2004 한국산업경영시스템학회지 Vol.27 No.3

국내 반도체 산업은 불과 20년도 안되는 짧은 기간통안에 곽목할만한 성장을 하여 전세게 반도체 생산 규토 면에서 3위 국가로 부상하였으며, 기술 경쟁력 면에서도 한국인의 자존심을 그나마 지져왔다. 하지만, 반도체 제조는 가장 복잡한 제조공정의 하나로 분류되며, 이러한 복잡한 시스템을 통제하기 위해서는, 다양한 시스템 조건하에서 적절한 생산전략을 마련하는 것이 필요하다. 그러나, 반도체 제조 시스템에 대한 다양한 상황과 관련한 연구 많지 않다. 반도체 제조공정 시스템에 대한 스케줄은 생산공정의 재진입, 공정의 높은 불확실성, 급속하게 변하는 제품과 기술과 같은 특성 때문에 반포체 제조공정 시스템에 대한 스케줄은 복잡하고 어려운 작업이며, 사이클타임의 절감 및 단위시간당 생산량의 증대와 같은 시스템 목적을 달성하기 위하여, 반도체 제조 시스쳄에 대한 좋은 방법을 발견하기 위한 많은 연구가 있었다. 반도체 산업의 생산 흐름은 가장 톡특한 특징을 가지고 있으며 생산계획과 반도체 제조의 스케줄링과 계획을 어렵게 하고 있다. 현재 반도체 조립공정에서 수행되고 있는 일정계획은 단순FCFS (First Come First Serve)에 의한 할당규칙에 따른다. 또한 Backlog(예비재고)를 1일 생산량을 기준으로 Buffer로 운영하고 있다. 따라서 본 연구에서는 효율적인 재고관리와 정확한 스케쥴링이 생산의 경쟁력 확보 우위임을 가정하여 다양한 할당규칙(dispatching rule)을 실시간 적용하여 정확한 일정계획 수립의 효과와 결과를 시뮬레이션을 통해 검증하고자 한다. 제시된 방법론을 위하여 시뮬레이션 접근방법이 사용되었다.

쥐의 타액선 방사선조사 후 만성반응에 Pentoxifylline과 Diltiazem이 미치는 영향

서현숙,양광모,강윤경,Suh, Hyun-Suk,Yang, Kwang-Mo,Kang, Yun-Kyung 대한방사선종양학회 1999 Radiation Oncology Journal Vol.17 No.3

목적 : 두경부암 환자들은 방사선조사 후 부작용으로 타액선의 기능부전인 구강건조증이 흔히 유발되어 치료 후 회복이 늦어지고 삶의 질이 저하된다. 방사선조사와 함께 혈류개선제로 알려져 있는 pentoxifylline (PTX)과 칼슘 통로차단제로 알려져 있는 diltiazem (DTZ)을 단독 또는 병합으로 투여한 후 타액선의 만성변화를 분석하여 이 약제들의 방사선손상 억제 가능성을 분석해 보고자 하였다. 대상 및 방법 : Sprague-Dawley 쥐 16마리를 네 군 즉, 1) 방사선조사 단독군, 2) 방사선조사와 PTX 투여군, 3) 방사선조사와 DTZ 투여군, 4) 방사선조사와 PTX, DTZ의 병합투여군으로 분류하였다. 4 MV 선형가속기를 이용하여 16 Gy 일회로 타액선 부위에 방사선조사를 시행하였다. PTX은 방사선조사 20분 전에 kg당 50 mg을, DTZ은 방사선조사 30분 전에 kg당 20 mg을 복강 내로 각각 투여하였다. 방사선조사후 10주와 16주후에 타액선을 절제하여 H&염색을 하여 병리학적 소견을 관찰하였고 만성변화의 객관적 지표인 세포질내 공포 형성의 정도를 백분율로 측정하여 각 군간의 평균값을 비교하여 통계적인 유의성을 $x^2$-검사에 의해 확인하였다. 결과 : 방사선조사 10주 후 타액선의 선방세포질 내에서 다수의 공포형성이 관찰되었으며 방사선조사와 PTX 투여군, 또는 PTX과 DTZ 병합투여군에서는 이들 세포질내 공포 형성이 통계적으로 의미 있게 감소하였다(p vaiue, 0.001). 그러나 DTZ 투여군에서는 세포질내 공포 형성 정도가 방사선조사단 독군에 비해 통계적으로 의미 있게 감소되지 않았다(p value, >0.05). 방사선조사 후 16주에 관찰한 실험 군들에서도 선방세포질내 공포형성의 차이가 10주군들과 각기 유사한 소견을 보였으며 10주와 다른 점은 선방세포의 전체 수가 감소된 것과 간질 내 섬유화의 증가였다. 결론 : 방사선조사를 받은 쥐의 타액선에서 PTX 투여, 혹은 PTX과 DTZ 병합 투여결과 만성손상이 감소되었음을 관찰하였고 이로 미루어 보아 PTX이 방사선조사후 발생하는 구강건조증을 예방하는 효과적인 약제가 될 수 있으리라 생각한다. Purpose : To elucidate the effects of pentoxifylline and diltiazem on the late response of the salivary glands of the rat after irradiation. Materials and Methods : Sixteen Sprague-Dawley rats were divided into 4 groups : (a) irradiation alone (b) irradiation with pentixifylline (PTX) (c) irradiation with diltiazem (DTZ) (d) irradiation with both PTX and DTZ. Irradiation was given in a single fraction of 16 Gy using 4 MV photon energy through an anterior port encompassing the left side of the salivary gland leaving the right side of salivary gland as a control. PTX, 20 mg/kg and/or DTZ, 50 mg/kg were infused intraperitoneally before irradiation, Two rats from each group were sacrificed on the 10th week and the rest was sacrificed on the 16th week after irradiation. Histopathologic examinations were undertaken for each section and the proportion of vacuolated cells out of the total number of cells under light microscopic fields was calculated. The statistical significance in the difference of the proportion of the vacuolated cells among the experimental groups was evaluated by a $x^2$-test. Results : Irradiated salivary glands of the 10th week group revealed markedly increased number of vacuolated cells compared to those of unirradiated control. The proportion of vacuolated cells was significantly reduced in both the PTX group (p value=0.001) and the combined PTX and DTX group compared to those of irradiation alone group. The DTZ alone group did not reveal the significant reduction of vacuolated cells compared to those of irradiation alone group (p value, >0.05). The 16th week groups revealed similar findings to those of the 10th week group, but the degree of chronic inflammatory cell infiltrates and interstitial fibrosis was increased and the number of acinar cells was reduced compared to those of the 10th week group. Conclusions : PTX significantly reduced the late radiation response of salivary glands, but DTZ did not reduce the same degree as PTX did. Taking the positive results of this study into consideration, it seems reasonable to apply PTX into the clinical trial for the head and neck irradiation to reduce the late radiation sequelae of salivary glands in the near future. At the same time the further experiment to clarify the subcellar mechni는 involved in PTX should be preceded.

A Study on Weighted Composite Dispatching Rule in the Semiconductor Modular Production Process - Application to M Company Semiconductor Process

Kwang Mo Yang(양광모),Kyong Sik Kang(박재훈),Jae Hyun Park(강경식) 한국산업경영시스템학회 2004 한국산업경영시스템학회 학술대회 Vol.2004 No.춘계

Scheduling semi-conductor manufacturing process systems is a complicated and difficult job due to such characteristics as reentry into manufacturing processes, high uncertainty of processes, and products and technologies changing rapidly. They have carried out many studies to find the efficient ways for semi-conductor manufacturing systems with a view to accomplishing the goals of systems like saving cycling time and increasing production quantity per unit time. The production flow in the semi-conductor industry has the most unique characteristics and makes it difficult to plan production and to schedule semi-conductor manufacturing. Currently, the scheduling methods in semi-conductor assembly processes follow the dispatching rule by simple FCFS(first come first serve). And backlog is operated as a buffer based on daily production quantity. In this study, therefore, we will apply various dispatching rules by real time basis and verify the effect and result of exact scheduling through simulation, based on the assumption that competitive advantages in production come from efficient inventory control and exact scheduling.