강원평화특별자치도 설립 추진 및 대응

구자열 한국지방자치학회 2021 학술발표대회 논문집 Vol.2021 No.1

대양항로에서 장거리 공대지통신을 위한 VHF Relay Network

구자열,임재성 한국항공운항학회 2012 한국항공운항학회지 Vol.20 No.3

In oceanic flight routes, HF radio and satellite data links have been used for air-to-ground communication, but these systems have long propagation delay and low data throughput. In this paper, we propose a reliable system to overcome the weakness of current HF radio and satellite communication systems for oceanic aeronautical flight routes. The proposed scheme uses only one aeronautical VHF channel in multi-hop oceanic communication environments and supports a hybrid type of multiple access, which consists of random access and TDMA (Time Division Multiple Access) scheme. The proposed system improves performance on delay and throughput as an effective solution to communicate end-to-end on the oceanic flight routes and strengthens the reliability of oceanic aeronautical communication. In oceanic flight routes, HF radio and satellite data links have been used for air-to-ground communication, but these systems have long propagation delay and low data throughput. In this paper, we propose a reliable system to overcome the weakness of current HF radio and satellite communication systems for oceanic aeronautical flight routes. The proposed scheme uses only one aeronautical VHF channel in multi-hop oceanic communication environments and supports a hybrid type of multiple access, which consists of random access and TDMA (Time Division Multiple Access) scheme. The proposed system improves performance on delay and throughput as an effective solution to communicate end-to-end on the oceanic flight routes and strengthens the reliability of oceanic aeronautical communication.

전자장거래시 국제물류에서의 신뢰와 파트너십에 관한 구조모형분석

구자열,조성원 한국마케팅관리학회 2002 마케팅관리연구 Vol.7 No.1

자료포락분석법을 적용한 한국과 일본의 광역경제권 단위에서 에너지 효율성 분석

구자열,김수덕 한국자원공학회 2011 한국자원공학회지 Vol.48 No.1

This paper analyzes the energy efficiency of 7 economic regions in Korea and 10 in Japan using Data Envelopment Analysis (DEA). For such analysis, a dataset is constructed for the seventeen economic regions during the period from 1996 to 2007. In this VRS (Variable returns to Scale) DEA model, labor, capital and 6 energy factors are selected for inputs. The gross regional domestic product (GRDP) is the only output. An energy saving target and total factor energy efficiency index are provided to indicate the efficiency of regional energy use as is suggested by Hu and Wang (2006). Most of the Japanese economic regions show higher efficiency scores compared with those of Korean for the entire sample period. Some of regions such as Japanese Metropolitan and Kinki Area can be regarded as the benchmark of energy saving target for other regions. 본 연구에서는 자료포락분석(DEA, Data Envelopment Analysis) 모형을 이용하여 한국과 일본의 광역경제권별 에너지효율성을 분석하였다. 한국과 일본의 총 17개 광역경제권별로 1996년부터 2007년까지 12년 동안의 데이터가 구축되었으며 투입요소로 노동과 자본의 생산요소와 6개의 에너지원, 산출요소로 지역별 GDP (Gross Domestic Product)가 규모에 대한 수익가변(VRS)을 고려한 DEA모형에 적용되었다. 자료포락분석 모형을 통해 총기술적에너지효율(OTEE, Overall Technical Energy Efficiency)과 에너지저감량(EST, Energy Saving Target)이 계산되고, 이로부터 Hu and Wang(2006)에 의해 제안된 총요소에너지효율(TFEE, Total Factor Energy Efficiency) 지수를 도출하여 각 에너지원별 에너지효율성을 평가하였다. 한국의 광역경제권은 일본의 광역경제권에 비해 현저히 낮은 수준의 에너지 효율성을 나타내고 있으며 일본의 수도권과 긴키권을 비롯한 몇몇 경제권은 한국의 광역경제권의 에너지효율 향상을 위한 벤치마킹 대상으로 제시되었다.

물류정보기술의 수용수준이 물류성과에 미치는 영향

구자열 경주대학교 정보전자기술연구소 2002 情報電子技術論叢 Vol.1 No.-

Logistics Information Technology' refers here to broad range of technology involved in information processing and handling in logistics function, such as computer hardware, software telecommunications and office information, and includes technologies as new system development methodologies. This study is to investigate the relationship between the performances of logistics information system and the adoption of logistics information technology, and to find the influence that the strategic plans affect on the logistics cost reduction, logistics selling general and administration expenses reduction, logistics service improvement. The specific purposes are as follows; 1. To investigate and integrate the concept of adoption level of logistics information technology and performance level of logistics to validate the relationship between two variables. 2. To examine the relationship between the adoption level of logistics information technology and performance level of logistics, and the influencing factors such as firm's characteristics, implementation of logistics strategic plan, logistics management function characteristics factors. 3. To suggest managerial and theoretical implications for both practitioners and academicians on the findings of this research.

마케팅연구에 있어서 인과관계 검증을 위한 개념적 시스템의 제안

구자열 경주대학교 2001 論文集 Vol.14 No.-

This article presents one framework for examining causality in the marketplace. The discussion begins with a treatment of the importance and role of causality, in order to place it in a proper perspective. Next, a formal outline of the concept of causality is examined. Emphasis is placed on its elements and structure, including its relation to the purposes of explanation, prediction, and control. Following this, a methodology is proposed for discovering causal relations. The presentation discusses a general for analysis that integrates the methodology for discovering causal relations with certain logical and conceptual criteria. Overall, the objective is to suggest a program for examining causality in qualitative, macro, or small-sample contexts. Finally, the article closes with a framework for applying the methodology in macro marketing contexts. Most research in marketing has been of the quantitative variety where large samples, interval data, and some control by the researcher have been the rule. Very little has been done in comparative contexts, with macro phenomena, or with small samples. Indeed, most of the methodological developments over the years have addressed the quantitative rather than qualitative. This article has attempted to develop some concepts and procedures for examining the more qualitative side of marketing, particularly when phenomena occur in their natural settings. Future work is needed to develop these ideas further and to apply them in a real case.

지역 대형할인점의 DB마케팅 성공요인에 관한 연구

구자열 경주대학교 지역개발연구소 2000 地域開發論叢 Vol.- No.3

This research evaluate several factors affecting the attention given to or "use" of specific database marketing by marketing managers in super discount store. This research apply t-test to test a model of research use involving 10 variables. Factors found to be especially important are organizational structure, the degree of resource guarantee, the responsiveness to environmental change, the degree of long range term, the recognition of customer information importance by managers. The topic and findings of the study relate to a central activity of the marketing profession-the application of knowledge-and to the use of an important product-database marketing. Both the database marketing and the bgehavior of managers as consumers of research products have been relatively neglected.

물류정보시스템 구축을 위한 JIT와 SCM의 역할

구자열 경주대학교 2002 論文集 Vol.15 No.-

The competitive environment of the future will require low cost, high quality products in a greater variety. In today's competitive environment, markets are becoming more international, dynamic, and customer-driven. Customers are demanding more variety, better quality and service, including both reliability and faster delivery. Technological developments are occurring at a faster pace, resulting in new product innovations and improvements in manufacturing processes. The resulting competitive environment requires low cost, high quality products In increasing varieties. These changes have investigated changes in business and manufacturing strategies. Understanding how supply chain management relates to their current processes is the first step toward integration. Their current processes may include elements of JIT. Where those elements align well with supply chain elements, the company may find it easy to move to implementing the corresponding supply chain element. Some supply chain elements may not align with any JIT elements and as such companies must evaluate their current capability on those elements. JIT techniques may not be appropriate for all companies. That does not mean those companies are not good candidates for supply chain implementation. Regardless of their involvement in JIT, companies implementing supply chain management must openly share information with their supply chain partners. Many JIT implementation problems are related to management c o m t m e n t and willingness to commit resources to employee empowerment and training. These factors are important in supply chain implementations. Managers who have addressed them as part of a JIT implementation can use that experience in their supply chain implementation. Supply chain management, like JIT, involves integration in processes and integration between companies. The end result of these advances will be greater end-use customer satisfaction by providing the desired product at the right time at an acceptable cost.

구매자의 상표선택에 미치는 상황적 자아이미지와 상표이미지의 영향

구자열 한국산업경제학회 2000 산업경제연구 Vol.13 No.6-1

백화점 서비스에 대한 품질인식과 그 측정에 관한 연구

구자열,조봉진 한국상품학회 1998 商品學硏究 Vol.- No.18