• Journal of information and communication convergence engineering
• /
• 제17권2호
• /
• pp.97-104
• /
• 2019

Distributed mobility management (DMM) does not use a centralized device. Its mobility functions are distributed among routers; therefore, the mobility services are not limited to the performance and reliability of specific mobility management equipment. The DMM scheme has been studied as a partially distributed architecture, which distributes only a packet delivery domain in combination with the software defined network (SDN) technology that separates the packet delivery and control areas. Particularly, a separated control area is advantageous in introducing a new service, thereby optimizing the network by recognizing the entire network situation and taking an optimal decision. The SDN-based mobility management scheme is studied as a method to optimize the packet delivery path whenever a mobile node moves; however, it results in excessive signaling processing cost. To reduce the high signaling cost, we propose a hybrid distributed mobility management method and analyze its performance mathematically.

• 한국항공운항학회지
• /
• 제18권2호
• /
• pp.46-53
• /
• 2010

In the aspect of the nature of aircraft maintenance work on divisible tasks carried out by a wide range of operation and expertise, any information transmission problems will not only cause a threat to flight safety but also reduce productivity by keeping the team from fulfilling its mission of delivering aircraft with airworthiness. In this regard, this study firstly identify the current status of information of aircraft maintenance and factors disturbing information transmission. Then, this article also find out the level of information culture of the AMT(Aircraft Maintenance Technicians) and problems in using information. Finally, suggestions on the model of the positive information culture in a field of aircraft maintenance through efficient use of the information including safety will be followed.

• 보건행정학회지
• /
• 제8권2호
• /
• pp.1-24
• /
• 1998

There exists a general consensus in Korea that patients tend to concentrate in large hospitals and this tendency is partly responsible for inefficiency in health services. The process of choosing a medical care provider for health care services and evaluating the provider after utilization seems to involve many diverse factors to become very complex. Therefore a systemsatic study is needed to achieve sufficient understanding of the proeess. For this point of view, this study investigates patient's selection of medical care institution for delivery care services and their evaluation of the institution after delivery. In more specific, the objectives of the study are twofold: 1) to identify the factors associated with expectant mothers' choice of type of medical care institution for delivery among tertiary hospitals, general hospitals, small hospitals, and clinics: and 2) to understand the factors affecting patient evaluation of the medical care institution after delivery. The data used for the analysis were collected through face-to-face interviews with those women who had childbirth during the period from January 1, 1996 to the date of interview in February 1998. The survey was conducted using preqared structured questionnaire in Seoul. The sample was drawn from each of arbitrarily defined four regions of Seoul, Northeast, Northwest, Southeast and Southwest, in proportion to the number of births reported in 1996 in each of them. The distribution of the interviewed women by educational level was made similar to that of mothers of new babies reported in 1996. The sample size was planned to be about 300, but ended up with analytical sample of 319. Major conclusions emerged from the analysis can be summarized as follows: 1) Large hospitals were evaluated as much better for technical quality than other types of institutions, whereas they were compared similar to or worse for other attributes. And it was found that technical quality of care is considered as the most important condition of medical care institution for delivery, while the amount of direct cost is considered as the least important one. Taken together, the utilization of large hospitals is not likely to decrease even though they cannot give satisfaction to patients in other aspects than technical quality. 2) The activeness in the search for information affected the respondents' evaluation of medical care institutions, which would influence their later decision or recommendation to other persons as to the choice of source of health care services. Therefore, increased efforts should be directed to improving availability of useful and correct information for patients in relation to the utilization of health care services. 3) Since the findings of this study were obtained from the analysis of delivery care services, their applicability to other kinds of services may be limited. Thus it would be useful to conduct a comparative study of several kinds of services explicitly taking into account the characteristics of those services in the analysis.

• 한국컴퓨터정보학회논문지
• /
• 제25권12호
• /
• pp.305-313
• /
• 2020

본 논문은 외식프랜차이즈 가맹점의 배달 앱 이용속성이 만족도, 경영성과, 재이용의도에 어떠한 영향을 미치는가를 분석하고, 프랜차이즈 본사에서 가맹점에서 배달 앱의 가맹점 서비스가 어떠한 방식으로 이루어져야 하는지를 목적으로 배달 앱 지원방안을 제안하고자 한다. 본 연구에서는 외식 프랜차이즈 가맹점 중 배달 앱을 이용한 경험이 있는 가맹점 212명을 대상으로 설문하였다. 연구가설의 검증을 위해 단일 회귀분석, 다중회귀 분석하여 변수간의 관계를 검증했다. 연구결과 첫째, 외식 프랜차이즈 가맹점 배달 앱 이용속성이 만족도에 긍정적 관계가 있는 것으로 나타났다. 둘째, 외식 프랜차이즈 가맹점 배달 앱 이용속성이 경영성과에 긍정적 관계가 있는 것으로 나타났다. 셋째, 만족도는 경영성과에 영향을 미치는 것으로 나타났다. 넷째, 만족도는 재이용 의도에 영향을 미치지 않는 것으로 나타났으며, 경영성과는 재이용 의도에 긍정적 영향을 미치는 것으로 나타났다. 외식 프랜차이즈 가맹점의 원활한 배달 앱 이용을 위해, 지속적 관리와 합리적 가격정책을 통해 가맹점의 이용만족도를 높여야 하고, 프랜차이즈 본사에서는 배달 앱 기업과의 효과적인 협업을 통해 가맹점 매출 활성화에 기여할 수 있을 것이다.

• 품질경영학회지
• /
• 제40권2호
• /
• pp.219-230
• /
• 2012

These days, getting a gob is emerging as a hot social issue, and specialized sites offering job information are rapidly increasing. On the contrary of quantitative increase, job information sites have lots of problems with respect to satisfying customer's needs. This study is designed to explore web-site service quality factors in job information site, and relationship among characteristic web service quality, customer satisfaction, relationship quality and reuse intention. In this study we found that customer satisfaction is prior to relationship quality, which decide long-term customer relationship. And also, Trust which is one of the relationship quality and customer satisfaction affect customers reuse intent respectively. This study also found that characteristic service quality in related to job information site can be composed of four factors such as delivery of information, customization, web design and interaction. Delivery of information, web design and interaction affect trust, and web design and interaction affect customer satisfaction. And also relationship quality is prior to reuse intention.

• Journal of the Korean Data and Information Science Society
• /
• 제10권1호
• /
• pp.271-277
• /
• 1999

본 연구에서는 섬유산업의 재고관리를 위한 정보시스템 구축사례를 소개한다. D 섬유회사를 대상으로 수주, 생산, 납품 및 재고등과 관련된 전 정보를 체계적으로 관리하여, 수주 및 생산 계획을 위한 가공능력분석 또는 납기를 지킬 수 있도록 하는 생산일정 계획 등의 의사결정이 합리적으로 될 수 있도록 하는 통합 재고정보 관리시스템을 구축한다.

• 대한의용생체공학회:학술대회논문집
• /
• 대한의용생체공학회 1995년도 추계학술대회
• /
• pp.253-256
• /
• 1995

Polymers have been one of the emerging biomedical materials in the area of biomedical research which are applicable to the human body. For human applications, noninvasive characterization of the biomedical polymers has been one of the important topics, and is valuable information. Among others, the swelling rate is one of the important measurements needed for the hydrophilic polymers. NMR imaging has been a suitable method for the noninvasive study of such a material since it is sensitive to many physical and biochemical changes of the specimens. In addition, NMR techniques possess many useful intrinsic properties such as the relaxation and diffusion effects. The present study has provided a noble and noninvasive method of measuring the process of swelling as well as volumetric changes occurred in polymers and drug delivery processes in a drug delivery system (DDS) together with changes of released drug. This gives information, relating with both water ingress process, volumetric changes of polymer specimens and the visualization of sequential drug delivery process. Also, this study provides more reliable method to ascertain the time dependent swelling process compared to the conventional method. The important aspects is that the proposed method is truly noninvasive and is able to ascertain time dependent processes.

• Smart Structures and Systems
• /
• 제30권1호
• /
• pp.35-47
• /
• 2022

Data-driven engineering is crucial for information delivery between design, fabrication, assembly, and maintenance of prefabricated structures. Design for manufacturing and assembly (DfMA) is a critical methodology for prefabricated bridge structures. In this study, a novel concept of digital engineering model that combined existing knowledge of DfMA with object-oriented parametric modeling technologies was developed. Three-dimensional (3D) geometry models and their data models for each phase of a construction project were defined for information delivery. Digital design models were used for conceptual design, including aesthetic consideration and possible variation during fabrication and assembly. The seismic performance of a bridge pier was evaluated by linking the design parameters to the calculated moment-curvature curves. Control parameters were selected to consider the tolerance control and revision of the digital models. Digitalized fabrication of the prefabricated members was realized using the digital fabrication model with G-code for a concrete printer or a robot. The fabrication error was evaluated and the design digital models were updated. The revised fabrication models were used in the preassembly simulation to guarantee constructability. For the maintenance of the bridge, the as-built information was defined for the prefabricated bridge piers. The results of this process revealed that data-driven information delivery is crucial for lifecycle management of prefabricated bridge piers.

• 유통과학연구
• /
• 제14권3호
• /
• pp.73-83
• /
• 2016

Purpose - The parcel delivery service(courier) industry all over the world has been expanding its market so far, but its growth has been declining in recent years. In this situation, most parcel delivery companies are having trouble with managing themselves because of the pressure from the customer to increase service level and decrease the rate. The purpose of this study is to provide ways to improve competitive advantages of the parcel delivery service industry by evaluating the multi-period operating efficiency of Korea, Japan and global service providers. Research design, data, and methodology - The data for the period of 2011 to 2014 were collected from the annual reports published by parcel delivery companies. In this study, we analyze the marketability (revenue), profitability (operating profits), and management conditions (net profits) of parcel service companies by combining information on human resources (number of employees) and material resources (total assets and equity). Therefore, the number of employees, total assets, and equity are selected as input variables, and revenue, operating profits, and net profits as the output variables. In this study, DEA (Data Envelopment Analysis) is used to measure the comparative efficiency and MPI (Malmquist Productivity Index) is used to analyze the trend of change of the efficiency for a multi-year period. Results - The operational efficiency scores of medium-sized parcel delivery companies in Korea are higher than other larger competitors such as Korean, Japan and Global larger companies. As of 2014, Logen(1.878) was found to be the most efficient parcel delivery enterprise, followed by KGB (1.224), and Kyoungdong(1.002). Otherwise, Hanjin(0.235), CJ(0.262), Hyundai Logistics(0.657), DHL(0.611), UPS(0.766), FedEx(0.498), TNT(0.350), Yamato(0.762) and Sagawa(0.520), larger sized companies, were done inefficiently. The productivity of parcel delivery companies is influenced by endogenous factors as well as exogenous ones such as changes in business environment and technological advances. Conclusions - Korean medium-sized companies have relatively high efficiency scores in operation. That is why they still survive the competitive market in Korea where market restructuring on the industry has been expected to be conducted for many years. The reason why medium-sized couriers had higher efficient scores than larger couriers is that most of couriers spend more operating expenses versus unit price of delivery which is the amount of money that is needed in order to send a package by parcel service. So the delivery unit price must be taken into account by all the expenses associated with the cost of fuel, labor and maintenance expenses for facilities, etc. therefore, the unit price must be increased to strengthen business competitive power. In order for the industry to have more competitive advantage, the companies need to make profits by increasing demand volume and raising the delivery rate to provide high-quality delivery service to customers. And both endogenous and exogenous change must take precedence in order to strengthen their competitiveness.

• 한국산학기술학회논문지
• /
• 제12권3호
• /
• pp.1278-1288
• /
• 2011

본 연구는 간호학생의 분만관찰 경험에 대한 주관성을 분석하는데 목적이 있다. 분만관찰 경험에 대한 주관성을 유형화하고, 구조화된 유형별 특성을 기술하며 분석하기 위해 Q 방법론을 사용하였다. Q모집단은 심층면담과 문헌고찰을 통해 형성되었으며 최종적으로 35문항의 진술문이 선택되었다. P 표본은 분만실습에 대한 Q 표본을 분류하였다. 수집자료는 PC QUANL 프로그램을 이용하여 분석하였으며 그 결과, 분만관찰 경험은 3가지 유형으로 분석되었으며 그 특성은 다음과 같다. 제1유형은 '산모 공감형', 제2유형은 '돌봄 요구형'. 그리고 제3유형은 '미래 분만 유추형'으로 나타났다. 결론적으로 분만관찰 경험에 대한 주관성 확인은 예비간호사로서, 여성으로서 가져야 할 올바른 가치관 형성을 위한 교육의 필요성을 시사한다.