• 기술혁신학회지
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• 제10권2호
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• pp.361-382
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• 2007

측정이란 측정기기를 가지고 계량하는 것을 의미하며, 측정표준 보급은 측정기기의 보급 및 확산과 밀접한 관계를 갖고 있다. 따라서 측정기기산업의 분석을 통하여 측정표준 보급의 영향을 살펴볼 수 있는 바, 본 연구에서는 측정기기의 산업부문별 생산유발기여도를 도출하여 산업구조 변화와의 관계를 분석하였다. 분석 결과에 의하면, 측정표준의 대용변수(Proxy variable)라고 할 수 있는 측정기기의 투입은 각 산업에 생산유발을 주고, 이러한 생산유발 기여가 해당 부문의 생산을 증가시키는데 기여하는 것으로 나타났다.

• Journal of Communications and Networks
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• 제18권5호
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• pp.846-856
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• 2016

Wireless sensor networks (WSNs) are widely applied in monitoring and control of environment parameters. It is sometimes necessary to disseminate data through wireless links after they are deployed in order to adjust configuration parameters of sensors or distribute management commands and queries to sensors. Several approaches have been proposed recently for data dissemination in WSNs. However, none of these approaches achieves both high efficiency and low complexity simultaneously. To address this problem, cluster-tree based network architecture, which divides a WSN into hierarchies and clusters is proposed. Upon this architecture, data is delivered from base station to all sensors in clusters hierarchy by hierarchy. In each cluster, father broadcasts data to all his children with instantly decodable network coding (IDNC), and a novel scheme targeting to maximize total transmission gain (MTTG) is proposed. This scheme employs a new packet scheduling algorithm to select IDNC packets, which uses weight status feedback matrix (WSFM) directly. Analysis and simulation results indicate that the transmission efficiency approximate to the best existing approach maximum weight clique, but with much lower computational overhead. Hence, the energy efficiency achieves both in data transmission and processing.

• 인터넷정보학회논문지
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• 제10권1호
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• pp.43-50
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• 2009

잘 알려진 무선 센서 네트워크의 프로액티브 프로토콜인 Flooding과 SPIN은 싱크 노드의 요청 없이 감지한 데이터를 즉각적으로 전송한다. 그러나 이러한 전송방법은 그 데이터가 필요하지 않는 노드들에게까지 전송하기에 에너지 효율성 측면에서 비효율적이다. 본 논문에서는 이러한 단점을 극복하기 위해서 전체 노드 대신에 적절한 일부 노드들에게만 전송할 수 있는 세미프로액티브 프로토콜을 제안한다. 따라서 만일 싱크노드와 같은 어떠한 노드가 감지한 데이터를 필요로 할 경우 미리 설정한 몇 홉 이내에 그 데이터를 쉽게 얻을 수 있다. 시뮬레이션 결과는 잘 알려진 SPIN과 비교하여 노드의 에너지 효율성이 약 83%까지 높다는 것을 보여주었다.

• 한국데이타베이스학회:학술대회논문집
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• 한국데이타베이스학회 2001년도 추계 컨퍼런스: 인터넷 비즈니스 환경에서의 디지털 컨텐츠 기술 발전 및 활용을 위한 컨퍼런스
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• pp.76-112
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• 2001

Web personalization entails the creation and dissemination of person- or group-specific content -- including, but not limited to, advertising, marketing campaigns, cross- and up-sell recommendations, or service and support information. (omitted)

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2017년도 추계학술발표회
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• pp.225-225
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• 2017

• 한국임상약학회지
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• 제25권3호
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• pp.178-186
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• 2015

Objective: Clinical practice guidelines (CPGs) are systematically developed statements aimed at helping optimal care of the patient in a given clinical circumstance. Because of the increasing evidence that active implementation of CPGs improve health outcomes, there is a growing awareness of the importance of guideline development and dissemination. The objective of this study was to investigate the status of CPG development and availability of the CPGs in Korea. Method: We searched in the Web sites of 180 organizations to identify CPGs which were developed and/or published in Korea until 1 July 2014. The data of titles, published year, publisher, distributer, and accessibility at the internet web of all CPGs were collected and analyzed. Results: A total of 172 CPGs were developed and 80% had been released since 2009. Most (51.2%) were developed for management of 4 diseases: 28 for digestive system disease; 27 for infectious disease; 18 for endocrine and metabolic diseases; and 15 for neoplasms. Of the 172 CPGs, 150 CPGs were publicly available. Among the 150 CPGs, 78.7% (118/150) were developed by only one organization. Conclusion: To ensure the production of high-quality CPGs, it is necessary to collaborate with other relevant professional societies in guideline development process. In addition, stronger efforts on wider dissemination of CPGs must be employed at the country levels to promote implementation of CPGs in clinical settings.

• 한국의류산업학회지
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• 제18권3호
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• pp.317-326
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• 2016

The main purposes of this study were to segment Chinese consumers who purchase fashion products through internet commerce according to internet shopping values, to compare their online word-of-mouth acceptance and dissemination behavior, and to examine the demographic characteristics and purchase behavior of the segments. 715 questionnaires were collected through internet survey from January $19^{th}$ to March $16^{th}$, 2015 and a total of 488 were used for the final data analysis. The respondents were twenty to thirty nine years old men and women living in all over China. Hedonic and utilitarian shopping values were identified through factor analysis and based on the shopping values, the respondents were categorized into four groups-ambivalent shopping value group, hedonic shopping value group, utilitarian shopping value group and indifferent group. Among these groups, there were significant differences in terms of online word-of-mouth acceptance as well as dissemination level and motivation. In overall, ambivalent shopping value group showed high online word-of-mouth acceptance as well as dissemination motivation. The groups also showed significant differences in clothing selection criteria, frequently purchased internet shopping sites, online clothing shopping frequency and information sources. The groups also differed in terms of age, residential area, education level, occupation and income. However, there were no significant differences in gender and marital status among the groups.

• Journal of Computing Science and Engineering
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• 제6권3호
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• pp.227-242
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• 2012

Vehicular Ad Hoc Networks (VANETs) are highly dynamic and unstable due to the heterogeneous nature of the communications, intermittent links, high mobility and constant changes in network topology. Currently, some of the most important challenges of VANETs are the scalability problem, congestion, unnecessary duplication of data, low delivery rate, communication delay and temporary fragmentation. Many recent studies have focused on a hybrid mechanism to disseminate information implementing the store and forward technique in sparse vehicular networks, as well as clustering techniques to avoid the scalability problem in dense vehicular networks. However, the selection of intermediate nodes in the store and forward technique, the stability of the clusters and the unnecessary duplication of data remain as central challenges. Therefore, we propose an adaptable destination-based dissemination algorithm (DBDA) using the publish/subscribe model. DBDA considers the destination of the vehicles as an important parameter to form the clusters and select the intermediate nodes, contrary to other proposed solutions. Additionally, DBDA implements a publish/subscribe model. This model provides a context-aware service to select the intermediate nodes according to the importance of the message, destination, current location and speed of the vehicles; as a result, it avoids delay, congestion, unnecessary duplications and low delivery rate.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2006년도 추계학술대회
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• pp.307-308
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• 2006

The national goal of wind energy dissemination has to be determined rationally based on technically available wind resource potential. For a reliable and scientific estimation or wind resource potential, a wind map is requisite. This paper presents the national wind map of Korea established by numerical wind simulation. Prediction accuracy of the low-resolution wind map is Improved by nudging QuikSCAT data and is validated by comparing with marine buoy beacon and met-mast measurements. Therefore, quantification of national wind resource potential is now possible and is anticipating to be utilized as a core index for policy and strategy building of wind energy dissemination and technology development.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권4호
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• pp.1223-1236
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• 2014

With the extension of wireless technology, vehicular ad hoc networks provide important services for the dissemination of general data and emergency warnings. However, since, the vehicle topology frequently changes from a dense to a sparse network depending on the speed of the moving vehicles and the time of day, vehicular ad hoc networks require a protocol that can facilitate the efficient and reliable dissemination of emergency messages in a highly mobile environment under dense or intermittent vehicular connectivity. Therefore, this paper proposes a new vehicular broadcast protocol, called BL-CAST, that can operate effectively in both dense and sparse network scenarios. As a low overhead multi-hop broadcast protocol, BL-CAST does not rely on the periodic exchange of beacons for updating location information. Instead, the location information of a vehicle is included in a broadcast message to identify the last rebroadcasting vehicle in an intermittently connected network. Simulation results show that BL-CAST outperforms the DV-CAST protocol in terms of the end-to-end delay, message delivery ratio and network overhead.