• 대한교통학회지
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• 제19권6호
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• pp.19-31
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• 2001

우리 나라 환경에 적합한 국가 지능형 교통체계(ITS: Intelligent Transportation Systems)의 구현을 위한 국가 아키텍쳐 수립연구가 국토연구원과 관련 학계와 산업계의 협동연구로 지난 3년간 수행되어 천여 페이지에 달하는 국가 아키텍쳐가 수립된 바 있다. 본 논문에서는 이를 위해서 고안된 도메인 수준과 논리 수준 및 물리 수준의 아키텍쳐 모형과 방법론을 제시한다. 도메인 수준의 아키텍쳐는 ITS를 구현함에 있어 관계되는 영역간의 국가적 협동체계를 이룩하기 위한 국가적 기본 틀이고 논리수준의 아키텍쳐는 서비스의 중복/사각/상충을 방지하기 위한 국가적 기본 틀이며 물리수준의 아키텍쳐는 서비스 시스템을 구축함에 있어 물리적 정보기술 자원을 효율적으로 할당하여 시스템 구축의 경제성과 효율성을 도모하기 위한 시스템의 물리적 구성 틀이다. 이를 위한 모델과 기법은 고전적 컴퓨터 기반 시스템공학에서의 프로세스 지향적 사고와 기법을 수정 보완하고 확장한 것으로 고 수준(High Level)에서의 아키텍쳐 구상에 적절한 것이다. 저 수준(Low Level)의 아키텍쳐는 설계 수준에서 이루어지는 것으로 전제하였다.

• 산업경영시스템학회지
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• 제44권3호
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• pp.146-164
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• 2021

This study examines the effects of the public's perception of emergency medical service (EMS) on the public health system's brand equity and the moderating effect of governance on this relationship using Keller's customer-based brand equity model. It uses four EMS functions: rescue/first-aid and transfer activities; disaster prevention, preparation, and response activities; educational activities in urgent situations; and medical treatment in emergency rooms to examine the effects of them on brand meaning of the public health system. Our findings are important for understanding the public as customers of the public health system and devising and/ or adapting healthcare policies and marketing strategies to develop brand equity and increase customers' loyalty to the public health system.

• International Journal of Computer Science & Network Security
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• 제22권3호
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• pp.95-100
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• 2022

Cloud computing platform is a shared pool of resources and services with various kind of models delivered to the customers through the Internet. The methods include an on-demand dynamically-scalable form charged using a pay-per-use model. The main problem with this model is the allocation of resource in dynamic. In this paper, we have proposed a mechanism to optimize the resource provisioning task by reducing the job completion time while, minimizing the associated cost. We present the Cooperative Agents Dynamic Resource Allocation and Monitoring in Cloud Computing CADRAM system, which includes more than one agent in order to manage and observe resource provided by the service provider while considering the Clients' quality of service (QoS) requirements as defined in the service-level agreement (SLA). Moreover, CADRAM contains a new Virtual Machine (VM) selection algorithm called the Node Failure Discovery (NFD) algorithm. The performance of the CADRAM system is evaluated using the CloudSim tool. The results illustrated that CADRAM system increases resource utilization and decreases power consumption while avoiding SLA violations.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권3호
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• pp.843-871
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• 2015

Cloud computing evolve as a cost effective business model for IT companies to focus on their core business without perturbing on infrastructure related issues. Hence, major IT firms and Small & Medium Enterprises (SME) are adopting cloud services on rental basis from cloud providers. Cloud Service level agreements (SLA) act as a key liaison between consumers and providers on renting Anything as a Service (AaaS). Design of such an agreement must aim for greater profit to providers as well as assured availability of services to consumers. However in reality, cloud SLA is not satisfying the parties involved because of its inherent complex nature and issues. Also currently most of the agreements are unilateral to favour the provider. This study focuses on comprehensive, 360-degree survey on different aspects of the cloud service agreements. We detailed the life cycle of SLA based on negotiation, different types of SLA, current standards, languages & characteristics, metrics and issues involved in it. This study will help the cloud actors to understand and evaluate the agreements and to make firm decision on negotiation. The need for standardized, bilateral, semantic SLA has also been proposed.

• Journal of Korea Trade
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• 제27권3호
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• pp.1-20
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• 2023

Purpose - Using trade data from 2008 to 2019, this study analyzes the impact of trade facilitation on China's agricultural exports under the RCEP framework using a gravity model based on the level of trade facilitation in 13 RCEP countries. Design/methodology - This study constructs a complete set of trade facilitation index systems, comprehensively measures the trade facilitation level of RCEP member countries, and uses a gravity model to verify the critical role of trade facilitation level in enhancing the trade volumes of RCEP member countries. Findings - We found that trade facilitation has a significant impact on China's agricultural exports as a whole. The effect of each primary indicator varies in magnitude, with finance and e-commerce (F) having the most significant impact, followed by customs efficiency (C) and infrastructure development (1); the institutional environment has no significant effect. Originality/value - This study analyzes the impact of trade facilitation on China's agricultural exports from the perspective of exports, and uses the latest data to study the degree of the impact of trade facilitation in importing countries. Measures to jointly enhance trade facilitation among member countries under the RCEP framework are proposed.

• 경영과학
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• 제23권3호
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• pp.209-224
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• 2006

The mobile communication technology would be one of the most appropriate means for achieving process innovation in the actual business area. This article performs a simulation study to examine the effect of introducing a mobile technology to the after-sales service and its logistics process. The performances of the two different systems, before and after introducing a mobile technology, are examined based on operational cost, operational efficiency, and customer service level using a discrete event simulation. The real-world data, extracted from a leading Korean electronics firm, was collected for this study. The results show that the TO-BE(after) model outperforms the AS-IS(before) model over all the performance indices. And the effects of introducing the mobile technology are more significant on the more tightly controlled inventory policy.

• 한국IT서비스학회지
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• 제13권3호
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• pp.333-342
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• 2014

As for the dimensions of service quality, reliability, responsiveness, assurance, empathy, and tangibles are the main factors that determine the company's service quality. To improve quality of service, companies emphasize the balance among the dimensions of service quality. These emphases improve definitely customer satisfaction and intention of reusing service, while communication at customer encounters give direct affects in customer satisfaction and intention of reusing service. This study shows how communications at customer encounters affect intention of reusing service and be affected by the dimensions of service quality. It especially analyzes how IT-based communications, one of physical one, such as phones, emails, messengers, and SNSs affect and be affected. In addition, it analyzes car repair service. This research uses a factor of communications at service encounter as for intermediate parameter and analyzes how it relates to dimensions of service quality and intention of reusing service. With following research model, it will analyze how IT-based communication affects intention of reusing service and be also affected by dimensions of service quality.

• 중소기업융합학회논문지
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• 제2권2호
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• pp.35-41
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• 2012

최근 클라우드 컴퓨팅과 모바일 인터넷 서비스의 급속한 발전은 사용자가 언제 어디서나 인터넷을 통하여 원하는 컴퓨팅 자원을 제공받고 지불하는 모바일 클라우드 서비스 환경으로 변화하고 있다. 그러나 모바일 클라우드 환경에서 사용자가 사용하는 모바일 기기를 사용자가 분실하였을 경우 사용자의 정보유출 및 외부에 위탁한 정보에 대한 접근통제 우회 등의 보안 위협에 대한 대응방법이 미흡한 실정이다. 본 논문에서는 모바일 클라우드 사용자가 서로 다른 레벨의 다른 사용자에게 안전하게 서비스를 제공하기 위한 클라우드 서비스 접근 제어 모델을 제안한다. 제안 모델은 다양한 접근 보안 정책을 적용할 수 있도록 사용자 및 단말이 인증을 수행할 때 역할기반의 접근권한 관리를 수행한다. 또한, 제안된 모델은 사용자의 속성 정보를 이용하여 사용자 인증 과정 전에 처리하기 때문에 통신 오버헤드 및 서비스 지연을 낮추고 있다. 실험 결과, 제안 모델이 기존 모델보다 패킷 인증 지연시간은 평균 3.7% 향상되었고, 인증서버의 처리량은 평균 10.5% 향상된 결과를 얻을 수 있었다.

• 보건행정학회지
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• 제33권3호
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• pp.295-310
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• 2023

Background: The long-term care (LTC) group has higher rates of chronic disease and disability registration compared to the general older people population. There is a need to provide integrated medical services and care for LTC group. Consequently, this study aimed to identify medical usage patterns based on the ratings of LTC and the characteristics of benefits usage in the LTC group. Methods: This study employed the National Health Insurance Service Database to analyze the effects of demographic and LTC-related characteristics on medical usage from 2015 to 2019 using a repeated measures analysis. A longitudinal logit model was applied to binary data, while a linear mixed model was utilized for continuous data. Results: In the case of LTC ratings, a positive correlation was observed with overall medical usage. In terms of LTC benefit usage characteristics, a higher overall level of medical usage was found in the group using home care benefits. Detailed analysis by medical institution classification revealed a maintained correlation between care ratings and the volume of medical usage. However, medical usage by classification varied based on the characteristics of LTC benefit usage. Conclusion: This study identified a complex interaction between LTC characteristics and medical usage. Predicting the requisite medical services based on the LTC rating presented a challenge. Consequently, it becomes essential for the LTC group to continuously monitor medical and care needs, even after admission into the LTC system. To facilitate this, it is crucial to devise an LTC rating system that accurately reflects medical needs and to broaden the implementation of integrated medical-care policies.

• International Journal of Quality Innovation
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• 제9권3호
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• pp.1-14
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• 2008

Patient satisfaction with the Emergency Department(ED) in a hospital is related to the length of stay, and especially to the amount of waiting time for medical treatments. ED overcrowding decreases quality and efficiency, therefore affecting hospitals' profitability. This paper presents a forecasting and simulation model for resource management of the ED at Moses H. Cone Memorial Hospital. A linear regression forecasting model is proposed to predict the number of ED patient arrivals, and then a simulation model is provided to estimate the length of stay of ED patients, system throughput, and the utilization of resources such as triage nurses, patient beds, registered nurses, and medical doctors. The near future load level of each resource is presented using the proposed models.