• Title, Summary, Keyword: 채널유형

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Efficient Channel Estimation and Packet Scheduling Scheme for DVB-S2 ACM Systems (DVB-S2 ACM 시스템을 위한 효율적인 채널 예측 및 패킷 스케줄링 기법)

  • Kang, Dong-Bae;Park, Man-Kyu;Chang, Dae-Ig;Oh, Deock-Gil
    • Journal of Satellite, Information and Communications
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    • v.7 no.1
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    • pp.65-74
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    • 2012
  • The QoS guarantee for the forward link in satellite communication networks is very important because there are a variety of packets with multiplexing. Especially, the packets are processed depending on the available bandwidth in satellite network changing the wireless channel state in accordance with weather condition. The DVB-S2 increases the transmission efficiency by applying the adaptive coding and modulation (ACM) techniques as a countermeasure of rain attenuations. However, the channel estimation algorithm is required to support the ACM techniques that select the MODCOD values depending on the feedback data transmitted by RCSTs(Return Channel via Satellite Terminal) because satellite communication networks have a long propagation delay. In this paper, we proposed the channel estimation algorithm using rain attenuation values and reference data and the packet scheduling scheme to support the QoS and fairness. As a result of performance evaluation, we showed that proposed algorithm exactly predicts the channel conditions and supports bandwidth fairness to the individual RCST and guarantees QoS for user traffics.

Importance Analysis on the Trytoursumer Social Media Channel (체험관광객(트라이투어슈머:Trytoursumer)의 관광 소셜미디어 채널 중요도 분석 연구)

  • Kim, Young-Ha
    • Journal of Digital Convergence
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    • v.14 no.4
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    • pp.193-200
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    • 2016
  • This study is focused on analyzing the tourism social media channel importance of Trytoursumer. On the basis of previous studies, the factors were divided into tourism communication, tourism cooperation, tourism contents sharing, tourism entertainment. As a result of the empirical analysis using AHP, Analytic Hierarchy Process, tourism communication relatively appeared as the most important factor. And order showed that the high importance of such tourism content sharing, tourism entertainment, tourism cooperation. Also, there was the highest priority of social networking in the area of tourism communication among 14 types of total evaluation factors regarding priority, followed by social news in the area of tourism cooperation, and micro-blog in the area of tourism communication. Analysis result, may contribute to the increase of social media channels effectiveness and strategy of application in social media channel of Trytoursumer.

Users' Attitude and Behavior about Movies by the Type of SNS Usage (SNS 이용 유형에 따른 영화에 대한 태도 및 행동)

  • Choo, Hyun;Ahn, Hyung Jun
    • The Journal of the Korea Contents Association
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    • v.13 no.12
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    • pp.690-701
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    • 2013
  • With the increasing adoption of social network services (SNS), the cultural and art industry is also embracing SNS as an important tool of marketing. Users can share various cultural experiences on SNS easily, and companies can analyze SNS to understand the users for effective marketing. Based on this background, this study analyzed users' behavior and attitude about movies according to SNS usage types. Users of SNS were surveyed and clustered into 'information seekers', 'fun seekers', and 'relationship seekers'. Next, the behavior of the users in each cluster was compared regarding information search about movies, preferred online advertisement channels, and post-watching behavior. The results showed that the SNS usage type has significant relationship with the behavior and attitude about movies. This suggests that movie industry can establish effective online marketing strategy by analyzing SNS usage of users.

The research of the way to gain domestic and foreign market economy force of whitening cosmetics (미백화장품 국내외 시장경쟁력 확보방안 연구)

  • Park, Joon-su;kim, heung-gi
    • International Area Studies Review
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    • v.21 no.2
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    • pp.121-141
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    • 2017
  • The world whitening cosmetics market is fast being taken in 'complex functional cosmetics' including complex function. And highly functional cosmetics market that call cosmeceutical market is growing up with highly functional cosmetics market. In addition, natural cosmetics market including whitening function is growing up in the world in complex functional cosmetics. Distribution channel of the world functional cosmetics is digital communication through beauty and digital. Global companies are adding relationship in new space between customer and brand. So worldwide change phenomenon of whitening cosmetics distribution channel will suggest importance that it should be able to communication with customer in non-traditional space. Domestic whitening cosmetics market is decreasing to reference compound annual growth rate -3.61%. While complex type market is increasing to annual growth rate 33.28%. Since 2008, domestic whitening cosmetics market was changed in distribution channel of center of traditional door-to-door sales. Especially, online channel is about 1/6 level of offline, but since 2014, year-on-year increase rate of online showed 27.1%. In the future, it is anticipated that ratio of online sales is above offline. Whitening cosmetics distribution is being changed, and online channel is growing up, so domestic companies will need tragedy targeting new whitening cosmetics distribution channel and traditional offline channel at the same time. If new company go into whitening cosmetics market, the new company will have to consider natural cosmetics in complex functional cosmetics than whitening cosmetics market. To secure domestic competitiveness whitening cosmetics market, securing differentiation of brand or pursuing change of distribution channel, and we need to seek a method that company and customer can forge communication in new space.

Cell proliferation inhibition effects of epigallocatechin-3-gallate in TREK2-channel overexpressing cell line (TREK2-채널 과발현 세포주에서 에피갈로카테킨-3-갈레이트의 세포 증식 억제 효과)

  • Kim, Yangmi;Kim, Kyung-Ah
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.3
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    • pp.127-135
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    • 2016
  • Two-pore domain potassium (K2P) channels are the targets of physiological stimuli, such as intracellular pH, bioactive lipids, and neurotransmitters, and they set the resting membrane potential. Some types of K2P channels play a critical role in both apoptosis and tumoriogenesis. Among the K2P channels, no antagonists of the TREK2 channel have been reported. The aim of the present study was to determine if the TREK2 channel is blocked and whether cell proliferation is influenced by flavonoids in the TREK2 overexpressing HEK293 cells (HEKT2). The electrophysiological current was recorded using single channel patch clamp techniques and cell proliferation was measured using a XTT assay. The electrophysiological results showed that the TREK2 channel activity was reduced to $91.5{\pm}13.1%$ (n=5) and $82.2{\pm}13.7%$ (n=5) by flavonoids, such as epigallocatechin-3-gallate (EGCG) and quercetin in HEKT2 cells, respectively. In contrast, the EGCG analogue, epicatechin (EC), had no significant inhibitory effects on the TREK2 single channel activity. In addition, cell proliferation was reduced to $69.4{\pm}14.0%$ (n=4) by ECGG in the HEKT2 cells. From these results, EGCG and quercetin represent the first known TREK2 channel inhibitors and only EGCG reduced HEKT2 cell proliferation. This suggests that the flavonoids may work primarily by inhibiting the TREK2 channel, leading to a change in the resting membrane potential, and triggering the initiation of a change in intracellular signaling for cell proliferation. TREK2 channel may, at least in part, contribute to cell proliferation.

The Study of Network Design Style Guide for TV Channel (TV 채널 Network Design Style Guide 연구)

  • 유형준
    • Archives of design research
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    • v.16 no.2
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    • pp.365-374
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    • 2003
  • Recently many TV have much interest in Network Design to get an advantage in the competition of the multi channels as part of the channel brand strategy. Since the Network Design was introduced in Korea in 1997, the major cable channels and satellite channels began to display Network Design on their screen competitively. But the production of Network Design has many problems in the field due to the lack of research information. The style guide is considered very important to succeed in Network Design execution as an indispensible process for a consistent planning and concrete production. This paper studied the Network Design Style Guide to establish a theoretical system of Network Design for a TV channel image promotion. First, this paper discussed the concept of Network Design and the necessity of the Network Design Style Guide, Second, this paper systemized the main component through the case study of the Network Design Style Guide and defined the concept of each element.

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Design of Multiprocess Models for Parallel Protocol Implementation (병렬 프로토콜 구현을 위한 다중 프로세스 모델의 설계)

  • Choi, Sun-Wan;Chung, Kwang-Sue
    • The Transactions of the Korea Information Processing Society
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    • v.4 no.10
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    • pp.2544-2552
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    • 1997
  • This paper presents three multiprocess models for parallel protocol implementation, that is, (1)channel communication model, (2)fork-join model, and (3)event polling model. For the specification of parallelism for each model, a parallel programming language, Par. C System, is used. to measure the performance of multiprocess models, we implemented the Internet Protocol Suite(IPS) Internet Protocol (IP) for each model by writing the parallel language on the Transputer. After decomposing the IP functions into two parts, that is, the sending side and the receiving side, the parallelism in both sides is exploited in the form of Multiple Instruction Single Data (MISD). Three models are evaluated and compared on the basis of various run-time overheads, such as an event sending via channels in the parallel channel communication model, process creating in the fork-join model and context switching in the event polling model, at the sending side and the receiving side. The event polling model has lower processing delays as about 77% and 9% in comparison with the channel communication model and the fork-join model at the sending side, respectively. At the receiving side, the fork-join model has lower processing delays as about 55% and 107% in comparison with the channel communication model and the event polling model, respectively.

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Uses and Gratifications of TV Home-shopping Channels (TV홈쇼핑 채널의 이용과 충족연구)

  • Lee, Sang-Bong
    • The Journal of the Korea Contents Association
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    • v.11 no.12
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    • pp.241-249
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    • 2011
  • This study takes a uses and gratification theory based approach to identifying the relation between TV home-shopping channel use motivation and purchase intention. The results are summarized as follows. First, in respect of TV home-shopping channel use motivation, the analysis results reveal three factors: convenience, information seeking, and entertainment. Among these, the factor of convenience was the first in the order of importance. Secondly, 1)It is found that use motivation also has some limited influence on purchase intention. 2)Selectivity and involvement degree, the sub-categories of audience activity, are found to be the variables with the highest prediction ability, suggesting a need to give a particular attention to them. 3)In addition, viewing amount, a variable of use behavior, is shown to have a significant influence on purchase intention. The followings are the implications of the study results. First, marketing strategies that enable maximization of shopping convenience are required. Second, there is a need to approach the delivery of TV home-shopping contents as a kind of broadcasting contents on their own rather than merely a medium for selling goods.

Cross-channel consumption behavior of clothing product - A cross-category analysis - (의류제품 크로스채널 소비행동 - 타제품군과의 비교 -)

  • Hong, Woo Jung;Lee, Kyu-Hye
    • The Research Journal of the Costume Culture
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    • v.27 no.2
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    • pp.98-108
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    • 2019
  • With the expansion of various distribution channels in online and offline stores, TV, and mobile, consumers now have more information search and retail selection channels to choose from than ever before. Major retailers now use multi- and omni-channel strategies. This study focused on cross-channel consumption, which involves the use of different information search and purchase channels. Using cross-channel consumption, consumers can search for information online and then make purchases offline and vice versa. The purpose of this study was to examine the relationship between channel strategies and other consumer variables, and the study also assessed the effect of product type. To conduct this empirical study, the researchers developed a consumer questionnaire concerning three consumer channel strategies-on-on, cross, and off-off-and four product categories-clothing, cosmetics, books, and electronics. The results indicated that gender and marital status did not influence consumer channel strategies, but that age did have a significant influence. The analysis showed that consumers in their 40s preferred the cross channel strategy, perceiving it to be effective, satisfactory, and rewarding. Compared to other products, clothing products showed higher levels of cross channel strategies. Consumers indicated that they prefer searching for information online and then purchasing clothing offline. Overall, clothing products generated higher levels of channel satisfaction and channel switch intentions. Cross-channel clothing shoppers reported effective information retrieval times but longer delivery times.

Probability Analysis and Performance Improvement Scheme of Handoff in DS-CDMA Cellular Systems (DS-CDMA 셀룰러 시스템에서 핸드오프 유형별 제공률 분석 및 성능 개선 방법)

  • Kwon, Soo-Kun;Jeon, Hyoung-Goo;Cho, Kyung-Rok
    • Journal of the Korean Institute of Telematics and Electronics S
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    • v.35S no.9
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    • pp.1-8
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    • 1998
  • In this paper, we analyze the probability of soft handoff and hard handoff which served in DS-CDMA cellular system, and propose a new handoff control scheme. The object of proposed scheme is to reduce the hard handoff probability of delay sensitive calls which are very sensitive to transmission errors. In this scheme, if soft handoff is not possible, for a delay sensitive call, a delay insensitive call using the same frequency channel that a handoff call is using is handed off to one of other frequency channels and the traffic channel released by delay insensitive call's handoff is assigned to a delay sensitive call for soft handoff. A performance of the proposed scheme was evaluated through computer simulation.

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