• 대한안전경영과학회지
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• 제15권2호
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• pp.167-184
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• 2013

A cross docking operation involves multiple inbound trucks that deliver items from suppliers to a distribution center and multiple outbound trucks that ship items from the distribution center to customers. Based on customer demands, an inbound truck may have its items transferred to multiple outbound trucks. Similarly, an outbound truck can receive its consignments from multiple inbound trucks. The objective of this study is to find the best truck spotting sequence for both inbound and outbound trucks in order to minimize total operation time of the cross docking system under the condition that multiple visits to the dock by a truck to unload or load its consignments is allowed. The allocations of the items from inbound trucks to outbound trucks are determined simultaneously with the spotting sequences of both the inbound and outbound trucks.

• 정보보호학회논문지
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• 제27권5호
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• pp.1129-1140
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• 2017

물리적 단방향 송신만을 허용하는 단방향 전송 시스템은 백워드 링크를 물리적으로 제거하여 외부에서 네트워크를 통한 침입을 원천 차단한다. 이러한 단방향 전송 시스템은 역방향 송신 또는 양방향 통신이 필요한 환경에서는 적용하기 어렵다. 본 논문에서는 outbound TCP 양방향 통신을 허용하는 제한적 양방향 통신 시스템(LimTway, Limited Two-way communications system)을 제안한다. LimTway는 포워드 및 백워드 단방향 링크를 사용하며, 포워드 단방향 링크는 outbound UDP 트래픽의 단방향 송신을 위해 항상 활성화 상태로 유지되는 반면, 백워드 단방향 링크는 허용된 outbound TCP 세션이 설립된 동안만 활성화된다. 백워드 단방향 링크가 활성화 상태인 기간 동안 발생할 수 있는 외부로부터의 침입을 차단하기 위해, outbound TCP 트래픽 및 outbound UDP 단방향 트래픽만을 허용하도록 소프트웨어를 설계하였다.

• 산업경영시스템학회지
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• 제46권4호
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• pp.116-123
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• 2023

In supply chain, most partners except the top level suppliers have inbound and outbound logistics. For example, toll manufacturing companies get unprocessed materials from a requesting company and send the processed materials back to the company after toll processing. Accordingly, those companies have inbound and outbound transportation costs in their total logistics costs. For many cases, the company may make the schedule of distributions by considering only the due delivery dates. However, the inbound and outbound transportation costs could significantly affect the total logistics costs. Thus, this paper considers the inbound and outbound transportation costs to find the optimal distribution plans. In addition, we have considered the inventory holding costs as well with transportation costs. From the experimental results, we have provided the optimal strategies for the distributions of replenishment as well as deliveries.

• 한국컴퓨터정보학회논문지
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• 제17권5호
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• pp.33-40
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• 2012

본 논문은 HTTP Outbound Traffic의 감시를 통해 다양한 웹 공격의 침입 경로에 대응하고, 학습 효율성을 높여 변종 또는 새로운 기법을 이용한 비정상 행위에 대한 오탐을 낮춘 기법을 제안한다. 제안 기법은 HMM(Hidden Markov Model)을 적용하여 HTML 문서속의 태그와 자바스크립트의 학습을 통한 정상 행위 모델을 생성한 후, HTTP Outbound Traffic속의 정보를 정상 행위 모델과 비교하여 웹 공격을 탐지한다. 실제 침입된 환경에서의 검증 분석을 통해, 제안기법이 웹 공격에 대해 0.0001%의 오탐율과 96%의 우수한 탐지능력을 보임을 제시한다.

• 경영과학
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• 제33권3호
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• pp.105-117
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• 2016

In this paper, we present empirical testing result to examine the validity of inbound supply and outbound demand risk factors in the sense of early predicting the firm's bankruptcy risk level. The risk factors are drawn from industry uncertainty attributes categorized as uncertainties of input market (inbound supply), and product market (outbound demand). On the basis of input-output table, industry level inbound and outbound sectors are identified to formalize supply chain structures, relevant inbound and outbound uncertainty attributes and corresponding risk factors. Subsequently, publicly available macro-economic indicators are used to appropriately quantify these risk factors. Total 68 industry level bankruptcy risk forecasting results are presented with the average R-square scores of between 53.4% and 37.1% with varying time lag. The findings offers useful insights to incorporate supply chain risk to the body of firm's bankruptcy risk level prediction literature.

• 대한산업공학회지
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• 제37권4호
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• pp.342-349
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• 2011

This paper considers the inbound and outbound truck scheduling problem in a cross docking terminal. The unloading process from inbound trucks and loading process to outbound trucks are assumed to be performed within a time window. If some items are not able to be loaded to their scheduled outbound trucks within the time window, they are stored in the terminal and shipped using the truck visiting the next time window. The objective of this paper is to schedule inbound and outbound trucks to minimize the number of items unable to ship within the time window. A mathematical model for an optimal solution is derived, and a rule-based local search heuristic algorithm and genetic algorithm (GA) are proposed. The performance of the algorithms are evaluated using randomly generated several examples.

• The Journal of Asian Finance, Economics and Business
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• 제6권4호
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• pp.147-158
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• 2019

The purpose of this study is to identify differences based on demographic characteristics and travel-related characteristics: first, whether travelers used a domestic travel agency and second whether travelers purchased a full-package travel program. A sample selection probit model was used to provide simultaneous evaluation of the different characteristics of outbound travelers. The present study investigates how tourists make decisions based on two travel-pattern choices. It then goes on to explore the characteristics of outbound travelers from South Korea. The data is drawn from a nationwide survey in South Korea, and a total of 859 surveys were used for analysis. Due to the interdependent nature of the choices, a sample selection probit model was used to estimate outbound tourists' use of domestic travel agency and purchase of full travel package. Significant determinants of domestic travel agency use are identified as age, gender, marital status, party size, children, length of travel, and travel distance, while those of full travel package purchase are age, marital status, and travel purpose. Estimated results provide manifestations of differing travel needs of outbound travelers. the results of this study demonstrate differences between travel-agency users and full-package travel-program consumers and provide determinants that affect the purchase of full-package travel.

• Journal of Information Technology Applications and Management
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• 제21권1호
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• pp.177-184
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• 2014

This research analyzes the effects of factors on the demands for outbound to the countries such as Japan, China, the United States of America, Thailand, Philippines, Hong Kong, Singapore and Australia, the countries preferred by many Koreans. The factors for this research are (1) economic variables such as Korea Composite Stock Price Index (KOSPI), which could have influences on outbound tourism and exchange rate and (2) unpredictable events such as diseases, financial crisis and terrors. Regression analysis was used to identify relationship based on the monthly data from January 2001 to December 2010. The results of the analysis show that both exchange rate and KOSPI have impacts on the demands for outbound travel. In the case of travels to the United States of America and Philippines, Korean tourists usually have particular purposes such as studying, visiting relatives, playing golf or honeymoon, thus they are less influenced by the exchange rate. Moreover, Korean tourists tend not to visit particular locations for some time when shock reaction happens. As the demands for outbound travels are different from country to country accompanied by economic variables and shock variables, differentiated measure to should be considered to come close to the target numbers of tourists by switching as well as creating the demands. For further study we plan to build outbound tourism forecasting models using Artificial Neural Networks.

• 한국컴퓨터정보학회논문지
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• 제16권1호
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• pp.125-132
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• 2011

웹 기반 공격에 대한 대응책으로 계층적 웹 보안 시스템이 있지만 다양한 혼합 및 우회 공격에는 제대로 대응하지 못하는 실정이다. 본 논문은 웹 공격에 의해 발생하는 악성코드 유포, XSS, 웹쉘 생성, URL Spoofing, 개인 정보유출 등의 증상을 HTTP outbound traffic의 감시를 통해 실시간으로 탐지하는 효율적인 기법을 제안한다. 제안 기법은 다양한 웹 공격에 의해 생성되는 HTML 태그와 Javascript 코드를 분석하여 설정한 시그너처를 outbound traffic과 비교 검색하여 웹 공격을 탐지한다. 실제 침입 환경에서의 검증 분석을 통해, 계층적 보안 시스템과 결합된 제안기법이 우회된 웹 공격에 대한 탐지능력이 탁월함을 보인다.

• 통상정보연구
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• 제8권1호
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• pp.437-453
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• 2006

Services could move over the world where they want to go. Especially, travel services shared 29.4 percent of total world exports, 625 billion dollars in 2004 (WTO, 2005). Tourism is a very important sector in service trade in the world. Of developing countries, Korea has been experiencing remarkable development in female outbound travel market since the complete liberalization on overseas travels in 1989, with about 3.85 million travelers in 2005, 2,000 percent growth rate over 1988. It means woman's social status has been increasing in Korea. Especially, in the study young housekeepers, solely office ladies, and college students were described as very important market segments in Korean woman outbound travel market. They were not only major decision makers, but also executors because of both enough economic power and social status improvement on small sized family. This study indicated that woman outbound travel market gets larger because their buying power and status are going to go improved in Korean social system. It is recommended that marketers be worth watching Korean woman travellers as a major target market through continuos observation and analysis.