• 한국정보과학회논문지:데이타베이스
• /
• 제36권4호
• /
• pp.314-320
• /
• 2009

최근에 검색서비스에서 스카이라인 질의 처리는 상당한 주목을 받고 있다. 스카이라인은 모든 속성들 측면에서 다른 객체에 지배되지 않는 관심 있는 객체들을 포함한다. 이에 관련된 기존 많은 연구들은 정적 데이터에 대한 스차이라인이거나 유클리디언 공간상에서 움직이는 대상에 대한 스차이라인 처리이다. 그러나 본 논문은 스카이라인 질의를 요청한 객체가 도로망에서 연속적으로 이동하는 것을 가정한다. 본 논문은 전처리된 객체들의 최단영역을 통하여 도로망에서 효과적인 연속적 스카이라인 질의처리를 위한 새로운 처리 기법을 제안한다. 제안하는 기법은 검색 대상에 대한 미리 연산된 최단거리 범위 데이터를 통하여 연속 스카이라인을 처리한다. 성능평가는 질의처리속도 측면에서 제안하는 기법이 기존방법보다 약 100배 정도 빠르다는 것을 보여준다.

• Spatial Information Research
• /
• 제15권2호
• /
• pp.95-109
• /
• 2007

최근 도로네트워크 환경에서 위치기반 서비스를 제공하는데 있어서 2차원 공간 데이터를 기반으로 하고 있다. 3차원 데이터는 사용자에게 2차원 보다 친근감을 주는 중요한 매체가 되지만, 데이터의 크기가 커지기 때문에 이동단말기의 메모리 공간의 한계로 모든 데이터를 저장할 수 없게 되는 문제점이 발생한다. 본 논문에서는 도로네트워크에서 이동객체에게 3차원 데이터를 제공할 수 있는 연속원근질의를 정의하고 이를 처리하는 방법론을 제안하였다.

• 한국정보시스템학회지:정보시스템연구
• /
• 제24권1호
• /
• pp.1-25
• /
• 2015

Social Network Service (SNS) has been played an important role in the life with the expansion of the modern technology in the cellular communication. More knowledge and understanding should be inevitable even if companies have taken advantage of SNS through word of mouth as one of the new paradigm. In most cases the crucial benefit or peculiarity of SNS has been overlooked because only general aspects of SNS have been applied in the online situation. As a result of this, same paradigm has been considered in reality as SNS was just used one of the marketing tools. However, essential aspects of SNS were investigated to see the relation of usage intention and word of mouth in this study. The hypothesis of the effect of continuous intention of the usage, trust and word of mouth was made and reviewed statistically. The statistical analysis showed there was significant among relationship, context, perceived service quality and continuous intention of the usage. In addition to that, self-expression, relationship, perceived service quality and trust were significant. Finally the continuous intention of the usage and word of mouth was significant as well. Based on this study, SNS provided by the companies could be effective to the customers in terms of word of mouth while different trend was shown in terms of trust.

• 한국토양비료학회지
• /
• 제44권4호
• /
• pp.545-550
• /
• 2011

Urea intercalated into montmorillonite (MT) exhibits remarkably enhanced N use efficiency, maintaining its fast effectiveness. This study dealt with the release property of urea from metal-urea-clay hybrid with MT (MUCH) under continuous-flow conditions and the cumulative impacts of its successive application on physicochemical properties of soils. Releases of urea were completed within 4 hrs under continuous-flow condition regardless of the types and the leaching solutions. However, urea release property was significantly affected by both the form of fertilizer and the presence of electrolytes in solution. The fast release property of urea from MUCH in continuous-flow condition was not significantly affected by soil properties such as soil pH and soil texture. In addition, its successive application did not lead to any noticeable change in soil physicochemical properties, water stable aggregate rate, water holding capacity and cation exchange capacity in both sandy loam and clay loam soils. Therefore, this study strongly supported that urea intercalated into MT could be applied as fast-effective N fertilizer, in particular for additional N supply.

• 지식경영연구
• /
• 제12권2호
• /
• pp.56-68
• /
• 2011

The rapid changes in business environments are also applicable to the delivery service field. Numerous companies are using smart phones in order to perform work of the delivery service field that is rapidly developing every year. Smart phones established ubiquitous work environments where access to the server of the head office is possible through telephones, scanners, and the internet anywhere and anytime. However, although smart appliances including smart phones have been diffused, empirical analysis of use of them in actual has not been attempted much. In this regard, current study empirically analyzes how connectivity and context-awareness function of smart phones based on the TAM(Technology Acceptance Model) influence the continuous intention to use through trust, usefulness, and ease of use. The results indicate that the connectivity and context-awareness function, which are natures of smart phones, had impacts on the ease of use and trust, but not on the usefulness. Based on these results, this study suggests implications and future research directions regarding the planning and realization of smart appliances.

• Journal of Information Technology Applications and Management
• /
• 제26권5호
• /
• pp.1-12
• /
• 2019

This study conducted an empirical study on factors affecting the continuous use of mobile payment for users. Based on Technology Acceptance Model (TAM) and Extended Expectation-Confirmation Model of lS Continuance (ECM-ISC), we set up the model and hypothesis by adding habit and utilization range as independent variables. We received 426 valid questionnaires from users who have used continuously mobile payments such as Alipay and Wechatpay in China. The collected data was analyzed by SPSS for validity, reliability, factor analysis, T-test and regression analysis. The result shows that perceived usefulness, perceived risk, habits and utilization range have positive effects on users who use AliPay. Users who use Wechatpay have been affected by perceived usefulness, perceived use of ease, habit and application scope. However, the social influence does not affect both.

• 한국IT서비스학회:학술대회논문집
• /
• 한국IT서비스학회 2006년도 춘계학술대회
• /
• pp.134-141
• /
• 2006

Today, the role of IT is so important that it is regarded as a partner of business, not a simple supporter. The more important the role of IT becomes, the higher the level of business needs rises and the more customers want. In the market of IT, more and more enterprises are establishing ITSM processes based on the ITIL for these environments: however they are experiencing the processes of trial and errors because of the shortage of references To improve these problems, in this study, we developed the ITSM model defined by investigation of the instance to which we have applied the ITIL Continuous Service Improvement Process which contains five phases such as High level Business Objectives. Assessment. Measurable Targets, Process Improvement, Measurement and Metrics. This model is an ITSM building framework to understand the concepts over the length and breadth of ITIL and minimize the trial and errors appearing during the building of the ITSM processes, and this paper presents a plan to develop the frameworks.

• Journal of Positioning, Navigation, and Timing
• /
• 제12권4호
• /
• pp.431-436
• /
• 2023

In order to provide continuous Korea Augmentation Satellite System (KASS) services, the operation organization should continuously and systematically perform operations, maintenance, and technical activities. All subsystems of KASS, all Line Replacement Units (LRUs), and Software Replacement Units (SWRUs) should be operated and maintained continuously. In order to effectively manage these activities, it is necessary to develop an Operation Management Tool (OMT). For this purpose, operation management, operation organization, and operation activities were defined. The defined requirements were divided into general, function, interface, and database for OMT development, and functions and decision-making procedures consisting of site/asset/trouble/work order/schedule management were designed. The OMT developed by reflecting the site and asset information as well as the design content met predefined requirements. The OMT will be actively used in actual KASS operation and will evolve by continuously reflecting the additional requirements of operators. Through this tool, KASS will support continuous service provision.

• 문화기술의 융합
• /
• 제10권1호
• /
• pp.411-417
• /
• 2024

재해 발생 시 주요 IT 인프라 중단을 최소화하고 연속적인 비즈니스 서비스를 제공하기 위한 재해복구 계획 및 재해복구시스템의 구축은 반드시 필요하다. 재해복구시스템 구축과정에서 데이터 복제는 재해 발생 시 중단 없는 연속적인 비즈니스 서비스 제공을 위한 데이터 복구의 핵심요소로 데이터 복제방식은 시스템 구성환경과 재해복구 목표수준에 따라 결정할 수 있다. 본 논문에서는 재해복구시스템 구축에서 구성환경과 재해복구 목표수준에 적합한 데이터 복제방식 결정 방안에 대해 제시한다. 또한 복제방식 결정 절차를 적용하여 재해복구시스템을 구축하고 구축 결과를 분석한다. 재해복구시스템 구축 후 재해 상황에서 재해복구센터로 서비스가 전환, 정상적인 서비스가 진행되는지를 판단하기 위한 모의 테스트를 진행하고 결과를 분석하였다. 그 결과 재해복구시스템 구축 단계에서는 체계적으로 최적의 데이터 복제방식의 선정이 가능했다. 구축된 재해복구시스템은 연속적인 비즈니스 서비스 제공을 위해 재해복구센터로 서비스 전환되는 시간 RTO는 3.7시간으로, Tier 2였던 재해복구 수준이 목표수준 RTO 4시간 이내, RPO=0으로 개선되었다.

• 가정간호학회지
• /
• 제10권1호
• /
• pp.73-84
• /
• 2003

This study was done to examine the home care service provided by home care nurses and the level of client satisfaction. Data were collected from 110 clients who received the home care service at the P-hospital in Pusan from 23th April, 2001 to 30th November, 2002. The tool for measurement of satisfaction was composed of 16 items and was 4 score scale. Data was analyzed by using SPSS/WIN 10.5 program, the results of this study are summarized as follows; 1) 77.3% among 110 clients were over sixty years old. By the disease pattern. subjects were distributed into cancer(52.7%), cerebro-vascular disease(22.7%) and the others. 36.4% of clients were received home visits from 10 to 20 times by home care nurse. 2) The total number of home care services was 20,828. And most of the clients received the health education and training. 3) The mean score of satisfaction on provided home care services was $3.36\pm0.45$, out of 4. among 16 items. 'The home care nurses were kind enough' was highest ($3.59\pm0.49$), the total level of satisfaction of home care services was very high. with total mean score $53.84\pm7.16$. As mentioned above. the satisfaction level of home care services was very high. so we can except that the prospect of home care services is very challengeable. Therefore. we should try to expand the service recipients with promotional education to the home care clients under the cooperation with medical staff and make more efforts to develop the management system about clients' information. to improve the quality of the service, to assure close ties with the public health centers for the continuous home care service linking.