• 대한안전경영과학회지
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• 제14권4호
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• pp.153-168
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• 2012

It has been recognized as an important issue to design optimally a firm's logistics network for minimizing logistics cost and maximizing customer service. It is, however, not easy to get an optimal solution by analyzing trade-off of cost factors, dynamic and interdependent characteristics in the logistics network decision making. Although there has been some developments in a system which helps decision making for logistics analysis, it is true that there is no system for enterprise-wise's on-site support and methodical logistics decision. Specially, E-biz process along with information technology has been made dramatic advance in a various industries, there has been much need for practical education closely resembles on-site work. The software developed by this study materializes efficient algorithm suggested by recent studies in key topics of logistics such as location and allocation problem, traveling salesman problem, and vehicle routing problem and transportation and distribution problem. It also supports executing a variety of experimental design and analysis in a way of the most user friendly based on Java. In the near future, we expect that it can be extended to integrated supply chain solution by adding decision making in production in addition to a decision in logistics.

• 경영정보학연구
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• 제10권2호
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• pp.123-135
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• 2008

온라인 광고모델의 기본 모델은 CPM (cost-per-mille) 기반 모델에서 CPC (cost-per-click) 기반 모델로 변화해왔으며, CPA (cost-per-action) 모델이 온라인 광고산업의 새로운 대안 모델로 제시되고 있다. CPA 모델에서는 사용자가 어떤 광고를 클릭 했는지에 관한 정보를 퍼블리셔(Publisher)가 보유할 수 있어야 하며, 그래서, CPA 모델의 핵심은 Conversation Action Data를 확보하는 것이다. 이 논문에서는 이를 획득하는 두 가지 기존 메커니즘을 소개하고, 이들의 특징을 비교하고, 각 메커니즘의 한계를 분석한다. 그 다음에 두 가지 새로운 메커니즘을 설계하고, 작동 요건을 분석하고, 실용성을 평가한다. 마지막으로, 기존의 메커니즘들과 새로운 메커니즘들의 특징을 비교하고, 각 메커니즘의 비즈니스 가치와 유용성, 응용 범위를 분석한다. 이 논문에서 제안된 2가지의 새로운 메커니즘과 기존 메커니즘과 비교 분석을 통해 퍼블리셔에게 최적 CPA 메커니즘에 관한 판단정보를 제공할 수 있을 것으로 판단된다.

• 만화애니메이션 연구
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• 통권13호
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• pp.255-267
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• 2008

최근 정보디자인 영역에서 애니메이션을 포함한 멀티미디어 활용이 급증하고 디자인 현장에서 응용이 확대되고 있음에도 불구하고 관련 연구는 매우 부족하며, 특히 어떤 특성이 정보전달효과를 향상시키는지에 대한 연구는 많지 않다. 지금까지 디자이너들의 관심은 독창성, 다양성 등 화면의 시각적 완성도에 집중되어 있었으며, 실제로 디자인에서 인지적 문제는 간과되어 왔다. 그러나 정보디자인의 궁극적 목적이 정보의 정확한 전달에 있다는 점을 생각한다면 독창성이나 다양성 이전에 정보 사용자의 혼란을 줄이고 정보전달력을 향상시키기 위한 인간의 시각적 인지능력, 기억력 등에 근거한 연구가 선행되어야 하고 이를 디자인에 적용하는 노력이 필요하다하겠다. 따라서 본 연구는 정보디자인에서 멀티미디어가 사용자인지 및 커뮤니케이션에 어떤 영향을 미치는지를 매체의 효용성 이론에 근거하여 검토하고 어떠한 환경 하에서 효과가 극대화될 수 있는지 살펴보고자 하였다. 매체의 효용성에 관한 이론들을 정리해 보면 멀티미디어와 같은 발달된 정보기술은 매체의 내재된 풍요도로 인하여 정보전달에 효과적으로 작용할 것이나 멀티미디어의 효과는 전적으로 매체풍요도의 관점에서 단순화시키기보다는 과제와의 적절성이나 인지적 적절성의 관점에서 다각적으로 분석해야 한다. 최적의 인터페이스 디자인을 위해서는 불필요한 인지부하를 없애면서 제한된 양의 작동기억을 최대한 활용하여 지식을 습득할 수 있도록 정보를 구조화하는 것이 중요하며, 또한 정확하고 성공적인 심상구축이 가능하도록 정보특성에 맞는 적절한 미디어 선택과 표현방법의 제시가 필요하다 할 것이다. 본 연구는 정보디자인의 커뮤니케이션 효과를 높이기 위하여 어떤 정보기술을 활용해야 하는가에 대한 의문을 매체의 효용성에 관한 이론들을 근거로 살펴봄으로서 향후 디자이너의 의사결정에 있어서 도움을 주고자 하였다.

• 한국콘텐츠학회논문지
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• 제22권4호
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• pp.145-158
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• 2022

기술의 발전에 힘입어 SNS를 활용하는 기업은 급속도로 증가하고 있으나 SNS를 단순히 '사용'하는 것만으로 그 기능을 '활용'했다고 말하기는 어렵다. 이에 본 연구는 사용을 넘어 디지털 기술과 SNS 기능을 온전히 활용하여 사용자의 편의성을 증대시키고, 공급자의 효율을 높여 현장을 활성화시키고자 하는 목적 아래 연구를 수행하였다. 본 연구는 2021년 2월부터 2021년 12월까지 A대학 대학원 신문사의 페이스북 이용실태를 참여관찰법을 통하여 분석 및 고찰하였다. 이에 따른 연구 결과는 다음과 같다. 첫째, 양질의 콘텐츠를 지속적으로 공급할 수 있도록 콘텐츠의 주제와 유형을 다변화시킬 필요가 있다. 둘째, 타겟보고서나 인사이트 등 SNS 기능을 활용하여 사용자의 범주와 특성을 살피고 이를 기반으로 사용자의 니즈에 맞는 콘텐츠를 공급해야 한다. 셋째, 저조한 사용자 참여와 페이스북 비활성화 문제를 해결하기 위하여 온라인 이벤트 등의 촉진전략을 새로이 개최할 필요가 있다. 이러한 본 연구는 디지털 환경 속에서 시장의 변화를 따라가지 못하는 일부 기업의 현실적 문제를 직시하고, 그 실패 요인과 이를 타진할 수 있는 해결 방안을 제시했다는 점에 연구의 의의를 둔다.

• 대한인간공학회지
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• 제30권1호
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• pp.265-273
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• 2011

Objective: The aim of this study is to investigate the attributing factors influencing usability of the mobile phones specifically designed for the elderly users. Efforts to identify factors that cause usability problems for the elderly users in using mobile phones can provide the groundwork for changes aimed at usability enhancement and design of interfaces of mobile phones. Background: It became important to understand the behaviors and tendencies of the elderly in communication as the society became older. The problems in digital divide is contributed to mainly lack of understanding in terms of the use pattern of the elderly and lack of consideration of their characteristics in designing user interfaces of most ICT devices. Method: A total of 30 elderly users who were over 65 years in age participated in usability evaluation test experiment and performed seven different tasks using a widely accepted model of universally designed mobile phone. Their performance was compared with that of contrast group that consisted of 10 younger participants who were on their 20s. Results: It was found that the elderly users had hard times in using mobile phones, especially in keypad manipulation among search, understanding, and manipulation subtasks. Conclusion: Older users seemed to have difficulty in all the subtasks of search, recognition, and manipulation. It was suggested that designers of mobile phones need to give careful consideration into designing visual interfaces for search tasks and keypads for easier control and input for the elderly users. Application: The study is expected to provide guidelines for the universal design of mobile phones and their interfaces for enhancing usability of the mobile phone for elderly users.

• International Journal of Knowledge Content Development & Technology
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• 제11권1호
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• pp.65-84
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• 2021

Our understanding of how barriers to access systematically varies with the compositional and contextual characteristics of users is incomplete. Using a public university library in Ghana, this study assessed the heterogeneous barriers or constraints students encounter in accessing electronic resources based on their demographic and contextual attributes. A descriptive survey design was adopted and structured questionnaires were administered randomly to 558 students in the four constituent colleges of the University of Cape Coast, Ghana. Data were collected and analysed using SPSS and descriptive statistics were generated. The results revealed that students faced six key challenges in accessing electronic information resources in the library namely delays in download of information, poor internet connectivity, and limited accessibility of university portal, inadequate computers in the library, poor lighting and limited ancillary services (on the spot printing facilities), with differences based on gender, academic level, and college affiliation. Only 24% males and 26% females had no challenges or problems with delays in download of electronic information. About three-fourth of all users had poor internet connectivity and complained about inadequate computers associated with accessing electronic resources. 40% percent of undergraduate students in the Colleges of Education Studies, Agriculture and Natural Sciences, and Humanities and Legal Studies each encountered four to six simultaneous challenges. Irrespective of gender, first year undergraduate students in all the four colleges were the least likely to report multiple challenges. This suggests the need for targeted and context-specific interventions to address the identified challenges.

• 한국정보통신설비학회:학술대회논문집
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• 한국정보통신설비학회 2009년도 정보통신설비 학술대회
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• pp.99-103
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• 2009

Recently, as wired and wireless communication services have rapidly developed and multimodal mobile devices which have various characteristics have widely spread, the need for new convergence services increases. The growing population of VoIP technologies and the high communication expense yield that the market of IP based telephony such as WiFi phone and IP phone is substituted for one of the conventional PSTN telephony. With the help of this trend, the wireline network operators desire to find a market in mobile networks. Therefore, they focus on Fixed Mobile Convergence (FMC) service as one of the key factors to accomplish this goal. FMC services are able to provide the mobility of voice services between circuit switched and packet switched networks. IP Multimedia Subsystem (IMS) based Voice Call Continuity (VCC) is one of the schemes to embody FMC services. As Application Server (AS) which has this VCC function provides seamless handover of services between heterogeneous networks, FMC subscribers can communicate seamlessly with others m WiFi domain and COMA domain using WiFi-COMA dual phone. Most of enterprises have already introduced IP network infrastructure and IP-PBX (Private Branch eXchange) for telephony. However, the problems of high communication cost and work inefficiency due to frequent outside jobs or business trips have remained. In order to solve these problems, demands for enterprise FMC services increase. In this paper, we introduce a new IP-PBX based VCC model that can provide seamless handover of voice services between WiFi and COMA networks for enterprise users and we investigate some interworking and security issues between Soft Switch (SSW) and IMS, or between IMSs. In addition, we introduce a new service that can provide the continuity of voice sessions as well as video sessions using Multimedia Session Continuity (MMSC) technology which has evolved from VCC. This service is expected to be one of the next-generation personalized services based on user's context.

• 산업경영시스템학회지
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• 제40권2호
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• pp.137-144
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• 2017

The business process of global third party logistics company is defined as a network of logistics activities which involves the products that are manufactured in the developing countries, such as Vietnam, China and so on, and delivered to North or South American countries via intermediate stopover sites. The third party logistics company usually uses proprietary logistics information system to support the related logistics activities. However, each consignor sometimes may require different business process based on the customer type or characteristics of their products. Therefore, the third party logistics company need to modify their business process to reflect customer's requirements, resulting in the modification of logistic information systems and additional costs. Therefore, a flexible mechanism is required to efficiently support the various types of requirements by the owners of the products. In this paper, first, we figured out various business rules related to third party global logistics activities. Second, we grouped the identified business rules into business processes, objects, relations, dependency, policy, representations, execution, and resources and further into precondition, postcondition, and invariant based on checking point in time. Furthermore, the categorized rules are classified into inter-activity and intra-activity rules based on the execution range. Third, we proposed a rule syntax to describe the defined rules into scripts which are understood by user and information system together. When each activity is executed, the rule manager checks whether there are rules related with the activity execution. Finally, we developed a prototype rule management system to show the feasibility of our proposed methodology and to validate it with an example.

• 한국지역사회생활과학회지
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• 제27권spc호
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• pp.625-634
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• 2016

This study aims to verify the effect of the rural community living home use through an analysis of depression among the elderly women who live alone in the rural community living home. A survey was conducted from July to September 2015 through direct interviews with 236 elderly people who live alone in community living homes at 52 locations across the country. The main results of this study are as follows. First, social support from family/relatives and neighbors/friends was found not to affect depression in the elderly living in community living homes. Second, satisfaction with health status, economic status and life appeared to affect their depression. This indicates the need for various measures to increase the subjective satisfaction of health. Third, when the demographic characteristics, social support and personal satisfaction were controlled, the period of use, satisfaction with use and operational service/no service were proven to have an impact on depression in the elderly living alone in community living homes. In other words, since the level of satisfaction with community living homes is very high and this has a positive impact on the elderly living in community living homes, it is desirable to have an ongoing policy for the homes to be utilized as important welfare resources. Based on these findings, this study proposes improvements in the user experience and programs and services offered for rural community living home business programs.

• 융합신호처리학회논문지
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• 제5권3호
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• pp.198-204
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• 2004

본 연구는 언어 장애를 가진 사용자의 언어생활을 돕기 위한 문장작성 방식을 제안한 것이다. 제안한 문장작성 방법은 통신보조기기에 적용할 수 있도록 시스템으로 구현해 보았다. 통신보조기기는 개인 휴대장치로서 필요한 문장을 작성하여 출력하는 기기이다. 언어장애인들의 대표적인 의사표현 수단인 수화는 일반인들과의 의사소통에는 불편하기 때문에 다른 표현 방법이 필요하다. 자모를 모두 입력하여 문장을 작성하는 방식은 키의 수가 많기 때문에 대화할 때 시간이 많이 소용되는 불편한 방식이다. 그러므로 언어장애인을 위한 문장 작성의 가장 중요한 목적은 적절한 장소와 상황에 맞는 단어가 배열된 통신보조기기를 이용하여 적은 키의 수로 문장을 작성하는 것이다. 본 연구의 문장 작성을 구현하기 위한 어휘정보는 사용자 영역을 정하고, 그 영역에 맞는 단어와 문장을 수집하고, 수집된 어휘의 특징을 추출하여 구축되었다. 그리고 제안한 문장 작성 방식의 효용을 측정하기 위해 시스템을 이용하여 문장 작성을 위한 키의 수와 키보드 입력에 의한 자모수를 비교하였다.