• 한국안전학회지
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• 제31권3호
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• pp.143-155
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• 2016

Recently, a massive loss of life and property is occurring in Korea due to traffic accidents, with the rapid increase in cars. For improvement of traffic safety, the Korea Transportation Safety Authority intensively analyzes accident data in local governments with low traffic safety index, performs a field investigation to extract problems and offers local governments improvements for problems, by conducting the 'Special Survey of Actual Conditions of Traffic Safety' each year, starting 2008. But local governments cannot strongly push forward the improvement projects due to the limited budget and the uncertainty of the improvement plan effects. Therefore, this study suggested a model which applied the Utility concept to the AHP theory, in order to efficiently decide a priority of the improvement plans in accident black spots in consideration of the limited budget of local governments. The number of accidents in each spot for improvement and accident severity, traffic volume, pedestrian volume, the improvement project cost and the accident reduction effect were chosen as evaluation factors for deciding a priority, and data about the improvement plan costs and the accident reduction effects, traffic accidents and traffic volume in the spots to undergo the special research on the real condition of traffic accident in the past were collected from the existing studies. Then, regression analysis was carried out and the Utility Curve of each evaluation factor was computed. Based on the AHP analysis findings, this study devised a priority decision method which calculated the weight and the utility function of each evaluation factor and compared the total utility values. The AHP analysis findings showed that among the evaluation factors, accident severity had the biggest importance and it was followed by the improvement plan cost, the number of accidents, the improvement effect, traffic volume and pedestrian volume. The calculated utility function shows a rise in utility, as the variables of the 5 evaluation factors; the number of accidents, accident severity, the improvement plan effect, traffic volume and pedestrian volume increase and a fall in utility, as the variables of the improvement plan cost increase, since the improvement plan cost is included in the budget spent by a local government.

• 한국항만경제학회지
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• 제38권4호
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• pp.65-85
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• 2022

본 연구에서는 디지털 시대의 항만을 뜻하는 스마트 항만의 지속가능성 영역과 지표의 우선순위를 도출하기 위하여 선행 연구들과 최근 전 세계적으로 전 산업에서 필수불가결하게 도입하고 있는 ESG를 함께 연구하였다. 운영, 환경, 사회, 지배구조 등 4가지의 영역의 상위 평가항목과 20개의 하위 평가항목으로 계층구조를 설정하였고 AHP 기법 중에서 항목들의 가중치를 매기는 상대적 평가방법을 적용하였다. 쌍대비교 설문지를 Satty(1980)가 제안한 9점 척도로 구성하였다. 국내 대표적인 4개의 항만공사(부산, 인천, 울산, 여수광양)에서 지속가능성 혹은 ESG 관련 업무를 수행하는 실무 종사자들을 대상으로 설문조사를 실시하였다. 분석 결과의 정확도를 높이기 위하여 일관성 비율이 0.1이하인 17부의 설문을 대상으로 AHP 분석을 실시하였다. 분석결과, 국내 스마트 항만의 지속가능성을 나타내는 4가지 영역 중 운영 영역의 우선순위가 제일 높았고, 그 다음으로 환경 영역임을 확인 할 수 있었다. 또한 20개 세부지표들에 대한 종합우선 순위를 살펴보면 운영 효율성, 운영 계획, 에너지 관리, 오염 측정 및 관리체계 등의 지표가 우선순위가 높은 것으로 나타났다. 반면 사회 영역과 지배구조 영역은 다른 영영들에 비해서 상대적 중요도가 낮은 것을 확인할 수 있었다.

• 대한토목학회논문집
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• 제32권1B호
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• pp.41-51
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• 2012

다양한 대안이 고려되는 SOC사업을 종합적으로 진행할 시 투입가능한 재원의 한계는 개별사업의 중요도를 바탕으로 한 투자우선순위를 필요로 한다. 특히, 댐 직하류 하천정비사업과 같이 내재된 가치가 복합적이고 판단기준이 다양한 경우 의사결정의 어려움에 직면할 수 있는데, 이는 다기준의사결정 기법을 활용함으로써 해결할 수 있다. 본 연구에서는 다기준의사결정 기법 가운데 다양한 대안을 고려할 수 있고, 투자우선순위 결정에서 장점이 있는 PROMETHEE을 활용하여 댐 직하류 하천정비사업 33개 대안에 대한 투자우선순위를 결정하였다. 이를 위해 댐 직하류 하천정비사업의 목적과 기능에 입각하여 7가지 세부 평가기준과 평가속성을 결정하였고, 평가기준별 가중치는 AHP 기법에서 제안하는 고유벡터법에 의해 산출하였다. 이를 바탕으로 PROMETHEE를 수행한 결과, 총 33개 대안 가운데 주암조절지댐, 운문댐, 용담댐 순으로 투자우선순위가 높은 것으로 나타났다. 본 연구에서 제시한 댐 직하류 하천정비사업의 투자우선순위는 향후 우선순위가 높은 대안을 대상으로 동시투자 혹은 단계적으로 투자하기 위한 의사결정자의 정책결정에 도움을 줄 것으로 판단된다.

• 한국정보처리학회논문지
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• 제3권4호
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• pp.697-708
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• 1996

본 논문에서는 ATM 망에서 우선권을 갖는 반응 혼잡 제어에 대해 연구하였다. 버퍼에 접속에 대한 우선권 할당은 부분 버퍼 공유 기법으로 대부분의 트래픽 요구를 만족 시키기 위해 망 자원의 이용을 향상 시키기가 위해 사용되어 졌다. 도착 모델은 MMPP(Markov Modulated Poisson Process)를 사용하였다. 우선권 할당에 의한 부분버퍼 공유 기법이 실제 ATM망에서 버스트 트래픽에 대한 영향을 분석하였다. 이러한 기법으로 버스트트래픽에 대한 시스템의 셀 수를구하고 손실 확률도 구해 보았다. 예방 제어가 망 내에서 동작 중에 있을 지라도 트래픽소스의 예측할 수 없는 통계적 변동으로 인해 여전히 혼잡이 발생할 수가 있다. 이논문 에서는 반응혼잡 제어를 연구한다. 반응 혼 잡제어에서 각각의 소스는 전송된 셀을노드에서 트래픽 부하로 변화시킨다. ATM망에서 반응 혼잡 제어방식을 병용하므로써 더욱 효율적인 제어를 하는 것이다. 해석적인 모델을 개발하여 우선권을 가지는 반응 혼잡 제어의수학적 해석을 수행하 였다.수치적인 결과는 우선권이 없는 계층의 성능에 대한 영향력을 거의 가지고 있지 않는 높은 우선권을 갖는 계층에 대해 손실 확률 값의 개선을 보여준다. 또한, 우선권을 가지는 반응 혼잡 제어는 혼잡을 피하는 것과 통례적 이득을 얻는 데 있어서 매우 효 과적임을 보여준다.

• 한국국방경영분석학회지
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• 제2권1호
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• pp.177-184
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• 1976

As the organizational size of a military service or business increases and its management becomes complex, the success in its management depends less on static type of management but more on careful, dynamic type of management. In this thesis, an operations research technique is applied to the problems of determining optimal air traffic control rule and of optimal capacity of air base for a military air base. An airport runway is regarded as the service facility in a queueing mechanism, used by landing, low approach, and departing aircraft. The usual order of service gives priority different classes of aircraft such as landings, departures, and low approaches; here service disciplines are considered assigning priorities to different classes of aricraft grouped according to required runway time. Several such priority rules are compared by means of a steady-state queueing model with non-preemptive priorities. From the survey conducted for the thesis development, it was found that the flight pattern such as departure, law approach, and landing within a control zone, follows a Poisson distribution and the service time follows an Erlang distribution. In the problem of choosing the optimal air traffic control rule, the control rule of giving service priority to the aircraft with a minimum average waiting cost, regardless of flight patterns, was found to be the optimal one. Through a simulation with data collected at K-O O Air Base, the optimal take-off interval and the optimal capacity of aircraft to be employed were determined.

• 한국안전학회지
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• 제14권3호
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• pp.193-197
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• 1999

By the report of KISCO, the 54.20% of total disaster and the 20.87% of death disaster was caused by unsafe position-control. However, it is possible to decrease this kind of disaster rate by designing the control device in the consideration of safety. One of the most popular control device is vehicle instrument panel. Therefore, not only basic function but safe control under the driving environments should be considered when the vehicle instrument panel is designed. For safe control at the driving time, it is especially important to determine the priority of each part using emergency degree and usage frequency, and to set them with this priority for easy control position. In this paper, developing method to determine the priority of each part by pair-wise comparison for emergency degree and usage frequency was suggested and generated the mutual order weights to give them orders. To apply this method to the parts of instrument panel such as function button, audio, air conditioner, and other several detail parts, the direct questionnaire was implemented to drivers about the emergency degree and usage frequency of each part.

• 한국콘텐츠학회논문지
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• 제9권11호
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• pp.100-107
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• 2009

본 연구는 병원고객관리를 위한 의료용 CRM 시스템의 설계를 목적으로 한다. 본 CRM 시스템은 병원에서 제공하는 정보 및 세미나를 필요로 하는 환자들의 우선순위 검색과 이를 통해 검색 결과 내의 인원별, 지역별 등의 연관 검색이 가능하도록 하였다. 고객은 병원에서 발송한 메시지를 받고, 세미나에 참여의사를 밝히는 메시지를 병원에서 실시간으로 출력하고 이를 관리한다. 이를 통해 병원에서는 고객이 참가할 세미나의 참여도를 파악하고, 세미나에 적극적으로 참여하는 환자들을 별도로 관리하여 향후 세미나 개최 시 우선적으로 서비스를 제공할 수 있도록 설계하였다.

• 농촌계획
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• 제15권4호
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• pp.1-10
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• 2009

Rural amenity is regarded as a breakthrough that can revitalize the rural communities. The demand for rural amenity development is also increasing since the urban people have growing incomes and leisure time. This study was implemented to survey the needs and application directions of rural amenity database. The survey questionnaires were collected from various related groups including industry, universities, administration and research institute. Two kinds of analysis of variance (ANOVA) were carried out in order to prioritize the building rural amenity resource map among four user groups and ten rural amenity resources. The result of survey showed that most of respondents had been aware of amenity resources and the industry group had the highest level of utilization in making decisions for rural development. Although the significant difference among groups was not shown in the priority, the priority in the construction of information map was shown the significant difference among 10 kinds of amenity resources. Landscape's map and traditional resource map were relatively higher priority than the other resource map.

• 환경영향평가
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• 제18권6호
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• pp.367-376
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• 2009

This paper proposes an application methodology of AHP(Analytic Hierarchy Process) based decision making theory for improvement priority by assessment of various risk factors affecting on deterioration of water supply systems, as major social infrastructure. AHP method is organized with three level of hierarchy which is introduced for multi-criteria decision making in this study. In the first level, assessment outputs are calculated by AHP for each affecting factor. In the second level, criteria are estimated by using assessment results with respect to structural and environmental factors. Consequently, ranking decision is performed in the third level. In order to present the effectiveness, a proposed method is compared with FCP(Fuzzy Composite Programming) for decision making. Since the results of the proposed method show better performance with consistent results, it can be applied as an efficient information for the determination for improvement priority of the study infrastructure.

• 한국통신학회논문지
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• 제21권8호
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• pp.1928-1936
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• 1996

In this paper, we propose an adaptive bandwidth allocation algorithm for the transmission of VBR video through ATM Networks. In order to evaluate the required bandwidth for the VBR video, the characteristics of the compressed VBR video generated by the two-layered coder are analyzed with variations in the number of GOP(N), quantizer scale(q), and the number of low-frequency DCT coefficients(.betha.). The two-layer coder which is used to separate from the number of DCT coefficients is designed to transmit the VBR video efficiently. The compressed data generated by the two-layer coder are splitted into the high priority and low priority cells. If congestion is occurred in ATM networks, the minimum image quality is maintained by the high priority cells. The required bandwidth for VBR video is estimated with a prediction algorithm using the scene anframe correlations as well as the statistical properties of the VBR video sources. Strong correlation among the adjacent slices in a frame represents by the scene correlation andstrong correlation among the frames is represented by the frame correlation. The performance of the bandwidth allocation scheme proposed is evaluated in terms of the bandwith utilization, cell loss rate, and SNR with variations in q, n, .betha.. Simulation rewsults shown that the proposed scheme is superior to the conventional methods.