• 한국환경복원기술학회지
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• 제16권2호
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• pp.115-125
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• 2013

In this research, a habitat model for Chinemys reevesii is suggested based on the components and variables of the Habitat Suitability Index which was determined through a series of literature researches, site surveys, and behavioral analysis. After reviewing the general habitat requirements, the site surveys(9 reservoirs) from July to December 2010, and the behavioral analysis of five Chinemys reevesii, the relationship between the behavioral and habitat use pattern was evaluated. According to the site surveys and behavioral analysis, the ecological core area(FK 50%) was about 0.96ha on average, the influence area(FK 90%) 4.22ha, and the home range was about $37.75{\pm}17.26m$ on average. As for the habitat use pattern of Chinemys reevesii, it travels through canals, and is influenced by the surrounding land uses. Also when there is a lack of food, the home range increases, and during hibernation, Chinemys reevesii prefers to be in an area within 1~2m range of water shores of fine textured soil and aquatic plants. After analyzing the information, the HSI standard was set and its components were determined as food, sunbathing and cover, aquatic environment, and spatial relationships. And the variables and the ranges of the components was determined as aquatic plant cover(0~49.81%), sandy area($3{\sim}13m^2$) and water velocity(0~60cm/s) etc. Lastly, plans and sections of the habitat model is provided designed according to the information from the researches, and problems to consider during habitat restoration was suggested in order to help understand about Chinemys reevesii habitat.

• 대한기계학회논문집A
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• 제20권4호
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• pp.1123-1132
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• 1996

It has been reported that high temperature structural components represent the phenomenon of material degradation according to a long term service under high temperature and pressure. Especially, fossile power plant components using the fossil fuel and heavy oil are affected by dewpoint corrosion of $H_2SO_4$produced during a combustion. Therefore, the service materials subjected to high temperature and pressure may occur the stress corrosion cracking. The object of this paper is to investigate SCC susceptibility according to the material degradation of the high temperature structural materials in dewpoint corrosive environment-$H_2SO_4$.The obtained results are summarized as follows : 1) In case of secondary superheater tube, the fractograph of dimple is observed at the concentration of $H_2SO_4$-5%. When the concentration of $H_2SO_4$ is above 10%, the fracture mode is shifted from a transgranular fracture to an quasi-intergranular fracture according to the increment of concentration. 2) In the relationship between [$\Delta$DBTT]$_sp$ and SCC susceptibility, it is confirmed that the greater material degradation degree is, the higher SCC susceptibility is. In addition, it can be known that SP test is useful test method to evaluate SCC susceptibility for high temperature structural components. 3) When [$\Delta$DBTT]$_sp$ is above 17$17^{\circ}C$ the SCC fracture behavior is definitely observed with SCC susceptibility of above 0.4.

• 디지털융복합연구
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• 제20권3호
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• pp.389-397
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• 2022

의학 분야에서 인터넷 활용의 증가로 대용량 의학 데이터를 효율적으로 전송할 수 있는 기술이 요구되고 있다. 광 인터넷에서 모든 OBS 노드들은 하드웨어 컴포넌트인 광 지연 라인들을 가지고 있다. 이것들은 몇 가지 최적 트래픽 조건을 이용해 계산되기 때문에 트랙픽 조건이 변하면 광 지연 라인들도 변해야 한다는 것을 의미한다. 이에 본 논문에서는 트랙픽 조건이 변하더라도 기존에 설치된 광 지연 라인을 이용하는 서비스 차등화 알고리즘을 제안한다. 트래픽 조건이 변할 때, 새로운 알고리즘은 데이터 버스트의 길이를 결정하기 위해서 사용되는 스레쉬홀드 값을 동적으로 계산한다. 그러므로 트래픽 조건이 변할지라도 제안된 알고리즘은 광 지연 라인의 대체 없이도 클래스들 사이에서 서비스 차등화를 달성할 수 있다. 본 알고리즘을 이용하면 손실에 민감한 대용량 의학 데이터를 효율적으로 전송할 수 있다.

• 대한임베디드공학회논문지
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• 제3권4호
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• pp.218-228
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• 2008

The convergence of broadcasting and telecommunication services is being accelerated by broadband networks, digital broadcasting and Web2.0. This paper describes the definition and service characteristics of IPTV as a representative of broadcasting and telecommunication convergence services. Especially, the changes of infrastructure and technology for IPTV2.0 are addressed in terms of the service features of mobility, intelligence and participation. IPTV2.0 shall be characterized by the open IPTV service based on Web2.0 and the mobile IPTV service over the heterogeneous networks employing various wireless/wired access technologies. The IP Multimedia Subsystem (IMS) and Service Delivery Platform (SDP) technologies are increasingly considered to support the personalization and openness. The mobility management technology is being evolved to provide QoS-guaranteed mobile communication services to users at anytime and anywhere. IPTV2.0 services and platforms are also anticipated to be core components to achieve knowledge-based ubiquitous society. IPTV2.0 contents are required to be integrated with the enhanced metadata to efficiently support search, selection, convergence and delivery of the contents. Moreover, those contents shall be enhanced to provide the scalable services which is adaptable to the network status and user preferences. Therefore, the networking technologies for IPTV2.0 should tightly cooperate with application services and adaptive contents. Those technologies will be developed to construct the ubiquitous content service platform considering the evolution of networks and various converged services.

• 한국기록관리학회지
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• 제12권1호
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• pp.33-58
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• 2012

웹과 모바일 환경의 변화와 함께, SNS는 정보유통에 있어서 중요한 도구로서 대두되고 있다. 그리고 페이스북, 트위터 등으로 대표되는 SNS는 소통의 새로운 패러다임으로 자리잡아가고 있다. 따라서 본 연구에서는 모바일 SNS를 통하여 기록정보서비스의 이용과 접근성을 확대시키고 기록 이용자의 참여와 협력을 도모할 수 있는 서비스를 제공하기 위한 방안을 모색하고자 하였다. 이를 위해 기존의 SNS에 대한 문헌조사를 통하여 모바일 SNS를 기반으로 효과적인 기록정보서비스의 제공방안을 제안하였다. 또한 제안방안의 실질적인 서비스 구현을 위하여 서비스 시스템 요소와 설계를 수행하였다.

• 혜화의학회지
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• 제22권2호
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• pp.143-154
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• 2014

Objective : The purpose of this study is to establish a concept called as 'medical service' newly and to develop an reliable and valid scale that measures medical service. Methods : In order to accomplish these objectives, both conceptual study and empirical study were performed. In a conceptual study, 5 core factors(doctor, medical team, medical facilities, medical process, and hospital) and 24 sub factors were extracted with assistant by 7 experts, based on antecedent studies about components of medical service. In an empirical study, data was taken from 244 adults living in Seoul and Daejeon with the conceptually founded medical service scale. Results : Results of empirical study showed reliability and validity of the medical service scale. Internal consistency coefficient showed high score of .97 and, in accordance with the conceptual study, "medical treatment factor", "appearance factor", "personal factor", "trust factor" and "dissatisfaction factor" were extracted from the data as the five main factors. Conclusions : Finally, limitations of this study and directions for further studies are discussed. Acknowledgement : This work was supported by the Daejeon University Research Grant.

• 유통과학연구
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• 제16권1호
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• pp.29-36
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• 2018

Purpose - The purpose of the research is to further explore the understanding of the nature of the brand distribution service (i.e., service brand) by undertaking a quantitative investigation. We focus on the role of customer's perception of service brand on the customer value creation process. Research design, data, and methodology - This study used single cross-sectional design and 137 airline passengers as respondents using a convenience random sampling. We distributed the online questionnaires by email address. The empirical setting for this research is airline service in Indonesia with a consideration that airline service has the useful context for this research as the service delivery process involve extensive customer interactions with the airline and its employees. We then analyzed the data using multiple regression (step-wise) method to fulfill the research objectives. Results - Using the step-wise regression method, the result shows that the influential factors to create customer value are cost and company image. The result suggests a company to improve its costs components and its company image in order to increase the customer value. Conclusions - The research shows that costs play a critical role, and completed with the company image to form the customer value variable. This shows that mostly customer formed their value based on costs they sacrificed. Mainly, this evaluation is monetary cost based, while Indonesian customers tend to have a high value for money demands.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권5호
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• pp.836-858
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• 2010

Web Services allow a user to integrate applications from different platforms and languages. Since mobile applications often run on heterogeneous platforms and conditions, Web Service becomes a popular solution for integrating with server applications. However, because of its verbosity, XML based SOAP messaging gives the possible overhead to the less powerful mobile devices. Based on the mobile client's behavior that it usually exchanges messages with Web Service continuously in a session, we design the Handheld Flexible Representation architecture. Our proposed architecture consists of three main components: optimizing message representation by using a data format language (Simple_DFDL), streaming communication channel to reduce latency and the Context-store to store context information of a session as well as redundant parts of the messages. In this paper, we focus on the Context-store and describe the architecture with the Context-store for improving the performance of mobile Web Service messaging. We verify our approach by conducting various evaluations and investigate the performance and scalability of the proposed architecture. The empirical results show that we save 40% of transit time between a client and a service by reducing the message size. In contrast to solutions for a single problem such as the compression or binarization, our architecture addresses the problem at a system level. Thus, by using the Context-store, we expect reliable recovery from the fault condition and enhancing interoperability as well as improving the messaging performance.

• 한국조리학회지
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• 제23권4호
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• pp.175-184
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• 2017

In franchisee industry, it is essential for franchisors to share knowhow and also specialized knowledge in order to realize favorable relationship and performance between franchisors and franchisees. Particularly, in mature food service industry, companies' specialized knowledge and knowhow are the core competence to obtain competitive advantage. Therefore, to create performance, it is absolutely necessary to share information and knowledge among all the franchisees. The purpose of this study is to verify relationship between franchisors' information sharing perceived by food service franchise owners, relationship quality, and relationship performance. A survey was done to food service franchisees, and total 297 samples were used to analyze the structural equation model. According to the analysis results, food service franchise companies' information sharing is significantly correlated with quality of relationship with franchise owners in a positive way. Also, franchisors' knowledge sharing has significant influence on performance of relationship with franchisees in a positive way. The components of relationship quality, trust and immersion, all influence relationship performance. Based on the results, this author suggests several implications about food service franchise management and information sharing.

• 한국통신학회논문지
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• 제36권8B호
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• pp.962-970
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• 2011

본 논문은 차세대 통합 커뮤니케이션 서비스 시스템에 대하여 기술한다. 차세대 통합 커뮤니케이션은 기업 내 직원들의 의사 소통 및 정보 공유를 위하여 전화, SMS(Short Message Service), 이메일, 채팅과 같은 기본 통신 수단에 소셜 네트워킹 서비스를 새로운 통신 수단으로 결합하여, 하나의 통합된 인터페이스에서 제공하는 서비스를 의미한다. 본 논문의 차세대 통합 커뮤니케이션 시스템은 차세대 UC(Unified Communications) 응용서비스, 개방형 UC 서비스 플랫폼, UC 백엔드 서버로 구성된다. 응용서비스는 웹 응용과 스마트폰에 탑재되는 모바일 응용으로 구성된다. 개방형 UC 서비스 플랫폼은 UC 응용서비스가 아닌 써드 파티 응용서비스에게 기업 내의 기본 및 소셜 네트워킹 서비스에 접근할 수 있는 개방형 서비스 컴포넌트를 제공한다. 백엔드 서버는 기업내의 전화, SMS, 이메일, 채팅을 위한 서버 기능을 제공한다.