• The Journal of Internal Korean Medicine
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• v.38 no.3
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• pp.336-352
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• 2017

Objective: This study investigated the perception, utilization, and satisfaction (in the general population), of the common cold treatment at the Korean Medical Clinic, to provide basic information for the development of Korean medicine clinical practice guidelines for the common cold. Method: A questionnaire was developed that consisted of questions about the general perception, utilization status, degree of satisfaction, willingness to use, and the improvement of the common cold treatment at the Korean Medical Clinic. An online survey was conducted using this questionnaire. Results: Three-hundred subjects responded to the survey. The results of the analysis were as follows. 1. 73.7% of the subjects recognized the common cold treatment at the Korean Medical Clinic. 2. 72% of the subjects had a positive perception of Korean medicine for common cold treatment. The major reason for the positive perception was the expectation about improving immunity and preventing recurrence. 3. Only 20% of the subjects had visited the Korean Medical Clinic for common cold treatment. The expensive cost was the major reason for not visiting the Korean Medical Clinic for common cold treatment. 4. The ratio of subjects who were willing to visit the Korean Medical Clinic for common cold treatment was 70%. 5. The expansion of health insurance coverage (67.7%), the activation of public relations (54.7%), and the development of a new herb medicine preparation that was easy to take (43.3%) were found to be necessary for improving the Korean medical service for common cold treatment. Conclusion: In spite of high recognition and positive perception, actual utilization of common cold treatment at the Korean Medical Clinic was relatively low. Multifaceted efforts are necessary to enhance the competitiveness of Korean medical service for treatment of the common cold.

• The KIPS Transactions:PartC
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• v.9C no.6
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• pp.893-902
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• 2002

MPLS enables efficient explicit routing, and thus provides great advantages in supporting traffic engineering. Exploiting this capability, we Propose a load balancing scheme which deploys a multipath routing. It is named LBM (Load Balancing in MPLS networks), and targets at efficient network utilization as well as performance enhancement. LBM establishes multiple LSP (Label Switched Path)s between a pair of ingress-egress routers, and distributes traffic over these LSPs at the new level. Its routing decision is based on both the length and the utilization of the paths. In order to enhance the efficiency of a link usage, a link is limited to be used by shorter paths as its utilization becomes higher Longer paths are considered to be candidate alternative paths as the utilization of shorter paths becomes higher. Simulation experiments are performed in order to compare the performance of LBM to that of static shortest path only scheme as well as the other representative dynamic multipath traffic distribution approaches. The simulation results show that LBM outperforms the compared approaches, and the performance gain is more significant when the traffic distribution among the ingress-egress pairs is non-uniform.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.16 no.9
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• pp.3172-3193
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• 2022

Cognitive radio-simultaneous wireless information and power transfer (CR-SWIPT) has attracted much interest since it can improve both the spectrum and energy efficiency of wireless networks. This paper focuses on the resource sharing between a point-to-point primary system (PRS) and a multiuser multi-antenna cellular cognitive radio system (CRS) containing a large number of cognitive users (CUs). The resource sharing optimization problem is formulated by jointly scheduling CUs and adjusting the transmit power at the cognitive base station (CBS). The effect of accessing CUs' spatial channel correlation on the possible transmit power of the CBS is investigated. Accordingly, we provide a low-complexity suboptimal approach termed the semi-correlated semi-orthogonal user selection (SC-SOUS) algorithm to enhance the spectrum efficiency. In the proposed algorithm, CUs that are highly correlated to the information decoding primary receiver (IPR) and mutually near orthogonal are selected for simultaneous transmission to reduce the interference to the IPR and increase the sum rate of the CRS. We further develop a spatial correlation-based resource sharing (SC-RS) strategy to improve energy sharing performance. CUs nearly orthogonal to the energy harvesting primary receiver (EPR) are chosen as candidates for user selection. Therefore, the EPR can harvest more energy from the CBS so that the energy utilization of the network can improve. Besides, zero-forcing precoding and power control are adopted to eliminate interference within the CRS and meet the transmit power constraints. Simulation results and analysis show that, compared with the existing CU selection methods, the proposed low-complex strategy can enhance both the achievable sum rate of the CRS and the energy sharing capability of the network.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.16
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• pp.267-293
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• 2001

The telecommunications-based information technology and the provision of electronic commerce are broadening possibility of the virtual enterprise. The purpose of this paper is to enhance academic and practical understanding virtual enterprise as one of the most promising new concepts in electronic commerce area. I strive to establish the concept of virtual enterprise as a strategic source of competitive advantage in small & medium business. I analyze several new trends and concepts in strategic business area which will eventually lead small & medium business to the virtual enterprise. It has great potential benefits for small & medium businesses which are placed in difficult circumstances. They must build IT infrastructure and make use of co-sourcing for the utilization of virtual enterprise. This paper also suggests the strategic methods which enable the conventional enterprise to introduce the virtual enterprise.

• International Commerce and Information Review
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• v.6 no.3
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• pp.245-268
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• 2004

The application of Internet-technologies to support inter-business transactions and relationships (also termed business-to-business, B2B, electronic commerce) has recently received tremendous attention. Recognizing the importance of the Internet as a powerful business tool, many companies including public organization such as KEPCO(Korea Electronic Power Corporation) have moved quickly to take advantage of electronic commerce. This study explores the impact of Internet-based technology on the procurement function, howe-procurement is helping organizations to enhance their competitiveness and the challenges to its adoption. The study also presents the findings from a survey conducted to gain insight into the adoption of e-procurement by KEPCO. Specifically, it seeks to uncover the prevalence of and extent to which public organization is adopting e-procurement, the benefits reaped and the barriers encountered in the course of implementation.

• Journal of Korea Multimedia Society
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• v.20 no.2
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• pp.429-436
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• 2017

This study was attempted to improve the utilization of kiosk DID and to establish the production direction of the kiosk DID to be developed in the future, through analysis of kiosk DID user satisfaction at bus stop. This study showed that the satisfaction of the usability of the bus stop kiosk DID was high but in order to enhance the active use of kiosk DID and user satisfaction, unique and interesting content needs to be added and switched, not just simple information but content that users will immerse.

• Journal of Korea Society of Digital Industry and Information Management
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• v.7 no.3
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• pp.75-83
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• 2011

Cognitive radio (CR) technology is to maximize the spectrum utilization by allocating the unused spectrums to the unlicensed users. This technology enables the sharing of channels among secondary (unlicensed) and primary (licensed) users on a non-interference basis after sensing the vacant channel and as a result, it is possible to harness wireless frequency more efficiently. To enhance the accuracy of sensing, RDSS was suggested. It is a fusion mechanism based on the reputation of sensing nodes and WSPRT (weighted sequential probability ratio test). However, in RDSS, the execution number of WSPRT could increase according to the order of inputted sensing values, and the fast defense against the forged values is difficult. In this paper, we propose a transaction signing-based authentication scheme for secure distributed spectrum sensing to response the forged values. The validity of proposed scheme is provided by BAN logic.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10a
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• pp.562-564
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• 2004

캐시 선인출 기법은 메모리 참조에 따른 지연시간을 줄이는 효과적인 방법이다. 그러나 너무 적극적인 선인출은 캐시 오염을 유발시켜 선인출에 의한 장점을 상쇄시킨다. 본 연구에서는 캐시의 오염을 줄이기 위해 동적으로 필터 테이블을 참조하여 선인출 명령을 수행할 지의 여부를 결정하는 4가지 필터링 방법들을 비교 평가한다. 비교 연구를 위한 이상적인 필터링 구조를 제안하였으며, 기존 연구에서의 잠김 현상을 개선하기 위한 이진 상태 구조를 제안하였다. 또한, 정교한 필터링을 위한 블록주소 참조 방식을 제안하였다. 일반적으로 많이 사용되는 일반 벤치마크 프로그램과 멀티미디어 벤치마크 프로그램들에 대하여 실험한 결과, 캐시 미스율이 이진 상태 구조는 평균 5.6%, 블록주소 참조 구조는 7.9% 각각 감소하였다.

• International Journal of Computer Science & Network Security
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• v.21 no.11
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• pp.312-320
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• 2021

Increase in computational cost and exhaustive search can lead to more complexity and computational energy. Thus, there is need for effective and efficient scheme to reduce the complexity to achieve optimal energy utilization. This will improve the energy efficiency and enhance the proficiency in terms of the resources needed to achieve convergence. This paper primarily focuses on the development of hybrid swarm intelligence scheme for reducing the computational complexity in binary optimization. In order to reduce the complexity, both artificial bee colony (ABC) and particle swarm optimization (PSO) have been employed to effectively minimize the exhaustive search and increase convergence. First, a new approach using ABC and PSO has been proposed and developed to solve the binary optimization problem. Second, the scout for good quality food sources is accomplished through the deployment of PSO in order to optimally search and explore the best source. Extensive experimental simulations conducted have demonstrate that the proposed scheme outperforms the ABC approaches for reducing complexity and energy consumption in terms of convergence, search and error minimization performance measures.

• The Journal of Information Systems
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• v.32 no.3
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• pp.19-39
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• 2023

Purpose This study aims to identify user experience factors that can enhance both metaverse utilization and satisfaction based on the honeycomb model. For this we presented two research questions: first, what are the experience factors of metaverse users? Second, do metaverse user experience factors impact satisfaction? Design/methodology/approach To address these questions, a mixed-methodology approach is employed, including text mining techniques to analyze online reviews and quantitative econometric analysis to reveal the relationship between user experience factors and satisfaction. A total of 69,880 reviews and ratings data were collected. Findings The analysis revealed eight metaverse user experience factors: entertainment, operability, virtual reality, immersion, economic activity, visual performance, avatar, and sociality, all of which were found to have a positive impact on user satisfaction.