• 한국빅데이터학회지
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• 제5권1호
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• pp.155-180
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• 2020

화물의 수배송을 위한 차량의 배차 및 최적 경로 설계는 물류 서비스의 효율성 향상을 위한 가장 핵심적인 역할을 담당한다. 이 문제는 차량의 대수, 차량별 적재 용량, 차량의 총 이동거리와 같이 다양한 비용 요소를 동시에 고려해야 하기 때문이다. 최근 비용 최소화 및 운영 효율성 향상을 위해 TMS를 도입하는 사례가 증가하고 있으나, 현장에서 필요한 모든 요소를 고려하지 못한다는 한계가 존재한다. 이를 해결하기 위해 현장 전문가가 TMS의 결과를 경험과 직관에 기반하여 수정하는 과정이 필요하다. 본 연구에서는 지금까지 총 비용의 최소화에 집중하고 있는 기존 연구들과 달리 서비스에 투입되는 자원 활용의 효율성과 형평성을 동시에 높일 수 있는 방법을 제안한다. 이를 위해 Cluster-First Route-Second (CFRS)기법을 활용한다. 고객의 위치를 기준으로 네 가지 클러스터링 알고리즘(K-Means, K-Medoids, DBSCAN, Model-based)과 Fisher & Jaikumar 알고리즘을 적용하여 고객들을 군집화하였다. 이 후, 군집별 최적의 차량 경로 계획을 수립하였다. 수치 실험을 통해 본 연구에서 제안하는 CFRS 기법을 적용한 방안이 상대적으로 차량의 전체 이동거리와 평균 이동거리 및 이동시간이 더 절감될 수 있다는 사실을 확인하였다. 또한, 차량별 방문하는 고객의 수에 대한 편차가 더 낮다는 사실로부터 기본적인 차량 경로 배정 유형에 비해 본 연구에서 제안하는 방안이 상대적으로 형평성 있게 업무가 할당되었음을 확인할 수 있었다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.1262-1274
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• 2011

안전에 대한 평가는 행정안전부에서 시행하는 안전실적에 대한 경영평가와 국토해양부에서 시행하는 안전심사가 있다. 행정안전부는 실적에 대한 사후적 평가를 하고 국토해양부의 안전심사는 사전에 예방을 위해 문제점을 지적하고 평가지적사항을 개선하는 방법으로 하고 있다. 본 연구에서는 안전분야 실적에 대한 평가 방법에 대한 문제점을 서술하고 개선방안으로 DEA분석 방법을 이용한 안전분야 평가 방법을 제안하였다. 지금까지 발표 된 안전사고에 평가방법은 운영주체별 사고 건수의 절대적 평가를 하고 있고 운영기관의 규모나 외적요인들을 반영한 상대적 평가가 이루어 지고 있지 않다. 본 연구에서는 자료포락분석기법의 CCR 및 BCC모형을 이용하여 2005년에서 2008년까지 도시철도운영기관의 순기술 효율성과 기술 효율성을 살펴보고 효율적인 운영기관과 비효율적인 운영기관을 알아보고 비효율적인 운영기관의 경우는 비효율의 원인과 개선방법을 제시하였다. 또한 공공감사기준(감사원규칙) 제2조에 따라 효율성을 경제성(Economy) 능률성(Efficiency) 효과성(Effectiveness)에 대한 평가로 효율성을 경제적인 측면과 효과적인 측면, 능률적 측면으로 나누어 각각 분석을 시도하였다. 경제적인 측면은 철도 운행을 위해 필요한 물적자원, 인적자원을 투입해 얼마나 경제적으로 결과물을 발생시켰는지를 평가하는 것이고, 효과적인 측면은 산출한 자원을 가지고 얼마나 의도한 결과를 달성하였는가를, 능률적인 평가는 산출/투입의 비율을 최대화를 효율적으로 한 운영기관이 어디인지 살펴보았다.

• 수산해양교육연구
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• 제29권2호
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• pp.479-491
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• 2017

The purpose of this study is to seek the recognition and development method of the competency assessment in order to set up the competency assessment system introduced for the manager promotion in B metropolitan city. The following conclusion were obtained by studying the recognition of competency assesment system of candidates for promotion and non-candidates. First, it is found that non-candidates have a higher recognition of the necessity of competency assessment system and its credibility, fairness and influence on relieving nepotism than candidates for promotion. Second, competency factors that recognized to be necessary for the performance of manager's role were direction guidance, fostering members, integrative thinking and communication in sequence by candidates for promotion, while direction guidance, communication, integrative thinking and management of organization in sequence the non-candidates. Third, in terms of the operational aspect of the competency assessment system, both candidates and non-candidates wanted a pass rate of 70~90%. And the time required for the assessment task was most favored for 1~2hrs, and the judges of the competency assessment were preferred in the order of professors, public official, consultants, and headhunters. Fourth, $1^{st}$ candidates than non-candidates recognized that the person who are from $5^{th}$ or $7^{th}$ class appointment are younger, have high education, are better at presenting, are in administrative positions, and are more optimistic would be more advantageous in competency assessment.

• 기술혁신학회지
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• 제8권1호
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• pp.183-208
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• 2005

In recent years, national R&D programs tend to become larger and more complicated, which necessitates strengthening the overall coordination of national R&D programs at the inter-ministerial level from the program planning stage. This paper looks into the status and problems of Korea's national R&D programs and proffers ways to improve the current system It highlights the problems shown in the process of the 2004 overall coordination and their rectification. First, various ad-hoc private-led committee brought about inefficiency in decision making process. Therefore, it is necessary to streamline such committees and strengthen the function of the Office of Science and Technology Innovation, Second, in view of the implementation of the overall coordination system, it is necessary to identify the problems in full detail that were raised in the course of the previous year's overall coordination so that new projects can be allotted minimal grades and follow-up activities can be efficiently put into execution. Third, it is necessary to establish standing committees for constant review and efficient utilization that will be devoted to reviewing programs overlapped and their linkage. Fourth, priority of investment regarding the nation's strategic policy direction should be reflected. Fifth, given the lack of performance-based evaluation system, it is necessary to develop macro and micro evaluation indices in conjunction with enacting the tentatively named "Performance-based Law." The overall coordination system of national R&D programs should be supplemented and further developed in relation to the aforementioned problems and their rectification in order to enhance the expertise, fairness, and efficiency of the nation's R&D coordination system.

• 치위생과학회지
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• 제19권1호
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• pp.31-38
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• 2019

Background: This study aimed to investigate the effects of critical thinking and good communication skills on the problem-solving abilities of dental hygiene students. Methods: A total of 508 dental hygiene students were convenience-sampled from 3 universities. Results: The results revealed that critical thinking had the highest intellectual fairness score of 3.60, and systematicity was the lowest at 3.19. The values for communication skills were high in reaction, social adequacy, and concentration, with an average of 3.65. Problem-solving abilities were in the following order: clarification of the problem, seeking solutions, and decision making. According to general characteristics, more extroverted personalities possessed higher levels of critical thinking, communication skills, and problem-solving abilities (p<0.01). Critical thinking scores were high (p=0.016) in students who responded that peer relationship was difficult; however, their communication skills were the lowest (p<0.001). Additionally, problem-solving abilities were highest among students who reported a difficult peer relationship (p=0.001). The higher the satisfaction with dental hygiene academics, the higher the critical thinking, communication skill, and problem-solving ability (p<0.001). Critical thinking showed a high positive correlation with variables in the following order: clarification of the problem, performing the solutions, seeking solutions, decision making, and evaluation and reflection. The communication skills were also related to these variables listed above (p<0.01). With critical thinking, confidence, watchfulness, intellectual passion/curiosity, sound skepticism, objectivity, and systematicity all influenced the problem-solving ability. Conclusion: Communication skills were influenced by noise control, putting on the other's shoe, social tensions, and efficiency, which affected the problem-solving ability. Dental clinics require dental hygienists to have critical thinking to make analytical judgments and effective communication skills to solve human relation problems with patients and care-givers. Therefore, these skills should be developed in dental hygiene students to improve their problem-solving abilities.

• 실천공학교육논문지
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• 제14권3호
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• pp.513-522
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• 2022

강의평가는 대학교육의 질을 향상시키고 수업을 개선하는데 유용한 정보로 활용된다. 본 연구는 강의평가를 구성하는 요인을 탐색하고자 선행연구와 FGI를 통해 구성요인을 도출하고 계층분석법(AHP: Analytic Hierarchy Process)을 통해 요인간 상대적 중요도 및 우선순위를 파악하였다. 이를 위해 5개의 구성요인과 15개의 평가항목을 도출하였다. 강의평가 요인개발의 전문성과 공정성을 확보하기 위해 학생과 교원을 대상으로 설문을 실시하여 총 20부의 유효한 자료를 수집하였고, 일치도 검증을 완료한 자료를 토대로 각 평가항목의 가중치를 산출하였다. 분석 결과 강의평가 요인구성에 있어서 학생은 수업 내용, 수업 방법, 수업 운영, 수업 평가, 수업 계획 순으로, 교원은 수업 내용, 수업 운영, 수업 방법, 수업 평가, 수업 계획 순으로 중요하다고 평가하였다. 본 연구 결과를 바탕으로 대학교육의 질 관리 차원에서 강의평가의 효율성과 신뢰성 향상을 위해 다양한 분석과 연구가 있기를 기대한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권4호
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• pp.1638-1654
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• 2018

The heterogeneous network (HetNet) has been one of the key technologies in Long Term Evolution-Advanced (LTE-A) with growing capacity and coverage demands. However, the introduction of femtocells has brought serious co-layer interference and cross-layer interference, which has been a major factor affecting system throughput. It is generally acknowledged that the resource allocation has significant impact on suppressing interference and improving the system performance. In this paper, we propose a hybrid-clustering algorithm based on the $Mat{\acute{e}}rn$ hard-core process (MHP) to restrain two kinds of co-channel interference in the HetNet. As the impracticality of the hexagonal grid model and the homogeneous Poisson point process model whose points distribute completely randomly to establish the system model. The HetNet model based on the MHP is adopted to satisfy the negative correlation distribution of base stations in this paper. Base on the system model, the spectrum sharing problem with restricted spectrum resources is further analyzed. On the basis of location information and the interference relation of base stations, a hybrid clustering method, which takes into accounts the fairness of two types of base stations is firstly proposed. Then, auction mechanism is discussed to achieve the spectrum sharing inside each cluster, avoiding the spectrum resource waste. Through combining the clustering theory and auction mechanism, the proposed novel algorithm can be applied to restrain the cross-layer interference and co-layer interference of HetNet, which has a high density of base stations. Simulation results show that spectral efficiency and system throughput increase to a certain degree.

• 농촌계획
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• 제22권4호
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• pp.49-60
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• 2016

This study is in order to promote agricultural products sold in the rural village festivals direct transaction marketplace and enabled by a comprehensive user evaluation of the rural village festivals direct transaction marketplaces in universal design perspective, provide a design plan for your care and comfort of a rural village festival Direct Deals Marketplace there is a purpose. Thus, redefining the principles of universal design suitable for direct transactions rural village festival marketplaces, and to do this by reclassifying the design elements of the farmstand-type in a framework was developed 30 questions to evaluate items for Universal Design Evaluation. And, the selection of three villages along the rural village festivals scale and conducted a survey of Universal Design Rating. As a result, the overall assessment was positive for B villages of rural village festival marketplaces direct transactions, there was a significant difference with the other village. In particular, there was a notable difference in the fairness, efficiency, promotional, safety and hygiene. And, there was a significant difference in design elements for directing atmosphere by selling space, product display, hygiene. This paper presents the design suggestions about a rural village festivals farmers' market aspects of universal design for improvement of the marketplace as following, 1) placement for differentiation the markerplace and around sites in the festival place, 2) to build the operating systems of sustainable management for arrangement and organization during the festival, 3) to install the device for maintaining agricultural products freshness 4) to separate the sale of local specialty products and general food products, and 5) to locate the suitable space considering the visitors tour route in the festival place for large-scale festival.

• 산업진흥연구
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• 제5권4호
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• pp.15-28
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• 2020

본 연구에서는 방산시장의 시장구조와 경쟁현황을 측정하기 위한 방법 및 방위산업과 방산시장의 특징을 살펴보고, 연도별 주요 방산업체 매출액을 바탕으로 시장점유율 및 상위 기업집중률, 허핀달-허쉬만 지수를 적용하여 시장구조와 경쟁현황을 분석해 봄으로써 국내 방산시장이 독과점구조에서 벗어나 경쟁지향적 시장 형태로 변화하도록 개선방안을 제안하고자 한다. 이를 위해 방산시장과 유사한 형태의 시장들을 비교·분석하였으며, 그 결과를 바탕으로 방산업체의 다양한 공급능력 구비를 위한 정부의 지원정책 추진, 정부 주도하 방산제품의 공급 시기, 규모, 기간을 고려한 기업 선정, 군 소요에 대한 정보 제공 등의 개선사항을 제안하였다. 이는 정부가 정책을 추진하는데 있어 근본적인 시장구조 개선 및 산업 차원의 정책개발을 통해 공정하고 원칙에 맞는 방산시장을 조성하여 기업 운영의 효율성을 추구하기 위함에 있다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권11호
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• pp.3876-3895
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• 2014

Recently, Heterogeneous Network (HetNet) with Coordinated Multi-Point (CoMP) scheme is introduced into Long Term Evolution-Advanced (LTE-A) systems to improve digital services for User Equipments (UEs), especially for cell-edge UEs. However, Radio Resource Management (RRM), including Resource Block (RB) scheduling and Power Allocation (PA), in this scenario becomes challenging, due to the intercell cooperation. In this paper, we investigate the RRM problem for downlink transmission of HetNet system with Joint Processing (JP) CoMP (both joint transmission and dynamic cell selection schemes), aiming at maximizing weighted sum data rate under the constraints of both transmission power and backhaul capacity. First, joint RB scheduling and PA problem is formulated as a constrained Mixed Integer Programming (MIP) which is NP-hard. To simplify the formulation problem, we decompose it into two problems of RB scheduling and PA. For RB scheduling, we propose an algorithm with less computational complexity to achieve a suboptimal solution. Then, according to the obtained scheduling results, we present an iterative Karush-Kuhn-Tucker (KKT) method to solve the PA problem. Extensive simulations are conducted to verify the effectiveness and efficiency of the proposed algorithms. Two kinds of JP CoMP schemes are compared with a non-CoMP greedy scheme (max capacity scheme). Simulation results prove that the CoMP schemes with the proposed RRM algorithms dramatically enhance data rate of cell-edge UEs, thereby improving UEs' fairness of data rate. Also, it is shown that the proposed PA algorithms can decrease power consumption of transmission antennas without loss of transmission performance.