• 한국콘텐츠학회논문지
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• 제11권10호
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• pp.93-107
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• 2011

우리나라의 경우 SO와 위성방송사업자는 직접사용채널을 운용할 수 있다. 그런데 직접사용채널을 어떠한 목적과 방식으로 운용할 것인지에 대해서는 방송법상 규정이 없다. 때문에 SO와 위성방송사업자는 직접 사용채널을 운용하지 않거나 운용하더라도 주로 수익채널로 활용하고 있는 실정이다. 이런 점에서 직접사용채널을 어떻게 운용하는 것이 바람직한가를 살펴보기 위하여 미국과 일본의 사례를 검토하였다. 미국의 경우 수익성 채널, 공동이용채널, 액세스 채널 등 다양한 성격으로 활용하고 있었다. 일본의 경우 지방자치 단체와 긴밀한 연계를 통해 지역소식과 이슈에 대한 여론을 형성하고, 지역행사를 안내하는 등 지역채널로 서의 성격이 강조되고 있었다. 우리나라의 경우 SO는 직접사용채널이 아닌 지역채널을 통해 일본과 유사한 성격의 지역채널을 운용하고 있고, 위성방송은 주로 자사의 수익을 목적으로 직접사용채널을 운용하고 있다. 이런 점에서 방송사업자의 자사 이익에 의해 운용하는 방식이 아니라 직접사용채널의 위상과 운용방안에 대한 심도깊은 논의를 통해 공익적 측면에서의 활용방안을 모색해야 할 것이다.

• 혜화의학회지
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• 제13권1호
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• pp.61-69
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• 2004

I have come to next conclusions in consequence of documentary study about medical books of many generations regarding acupuncture and moxibustion therapy of arthalgia syndrome. 1. Jing point of regular channels is most used. Next there are extraordinary point, ashi point in the acupuncture and moxibustion therapy of arthalgia syndrome. 2. The gall baldder channel of foot-shaoyang is most used. Next there are the urinary bladder channel of foot-taiyang, the large intestine channel of hand-yangming, the stomach channel of foot-yangming, the small intestine channel of hand-taiyang, the spleen channel of foot-taiyin, the liver channel of foot-jueyin, the triple-warmer channel of hand-shaoyang, the du channel, the lung channel of hand-taiyin, the kidney channel of foot-shaoyin, the pericardium channel of hand-jueyin, the heart channel of hand-shaoyin, the ren channel in the order of frequency in used channel among the twelve channels. 3. Three yang channels of foot is most used. Next there are three yang channels of hand, three yin channels of hand, three yin channels of foot in the order of frequency in use among the twelve channels. 4. The gall baldder channel of foot-shaoyang is most used. Next there are the urinary bladder channel of foot-taiyang, the large intestine channel of hand-yangming, the triple-warmer channel of hand-shaoyang, the stomach channel of foot-yangming, the small intestine channel of hand-taiyang, the liver channel of foot-jueyin, the lung channel of hand-taiyin, the spleen channel of foot-taiyin, the kidney channel of foot-shaoyin, the du channel, the pericardium channel of hand-jueyin, the ren channel the heart channel of hand-shaoyin in the order of frequency in used point among the twelve channels. 5. Huantiao is most used. Next there are Weizhong, Quchi, Yangfu, Chize Feiyang Xiyangguan Xiguan Tianjing, Sanli Xiaoluo in the order of frequency in use. 6. Jing point in the order of frequency of use, expel wind-evil and remove wetness-evil on the Acupuncture and Moxibustion Therapy of Arthalgia Syndrome.

• 한국유체기계학회 논문집
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• 제13권3호
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• pp.30-36
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• 2010

The detailed heat transfer coefficients on a rotating dimpled channel were measured by the hue detection based the transient liquid crystal technique. The dimples were fabricated on the one side of the channel and the tested channel aspect ratio was 4, 6, and 12 with fixed channel width. Tested Reynolds number based on the channel hydraulic diameter was varied from 21,000 to 47,000. A stationary case and two different rotating conditions were tested so that the dimple fabricated surface became leading or trailing surface. For all rotating conditions, the minimum averaged heat transfer coefficient was measured for the channel aspect ratio of 6. Generally, the highest averaged heat transfer coefficient was observed for the highest aspect ratio cases due to increased dimple induced vortex strength.

• Journal of electromagnetic engineering and science
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• 제7권4호
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• pp.195-200
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• 2007

Doubly-selective channel estimator for orthogonal frequency division multiplexing(OFDM) systems is proposed in this paper. Based on the generalized complex exponential basis expansion model(GCE-BEM), we describe the time-variant channel with time-invariant coefficients over multiple OFDM blocks. The time variation of the channel destroys the orthogonality between subcarriers, and the resulting channel matrix in the frequency domain is no longer diagonal, but the main interference comes from the near subcarriers. Based on this, we propose a channel estimator with low pilot ratio. We first develop a least-square(LS) estimator under the assumption that only the maximum Doppler frequency and the channel order are known at the receiver, and then verify that the correlation matrix of inter-channel interference(ICI) is a scaled identity matrix based on which we derive an optimal pilot insertion scheme for the LS estimator in the sense of minimum mean square error. The proposed estimator has the advantages of low pilot ratio and robustness against inter-carrier interference.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2009년도 춘계학술발표대회
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• pp.842-845
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• 2009

Wireless ad hoc networks often suffer from rapidly degrading performance with the number of user increases in the network. One of the major reasons for this rapid degradation of performance is the fact that users are sharing a single channel. Obviously, the problem of using single shared channel schemes is that the probability of collision increases with the number of nodes. Fortunately, it is possible to solve this problem with multi-channel approaches. Due to the especial properties of multiple channels, using the multiple channels is more efficient than single channel because it enhances the capacity of the channel and reduces the error rate during data transmission. Some multi-channel schemes us one dedicated channel for control packets and one separate channel for data transmissions. On the other hand, another protocols use more than two channels for data transmissions. This paper summarizes six multiple channel protocols based on these two kinds of schemes. Then we compare them and discuss the research challenge of multiple channel protocols.

• Journal of information and communication convergence engineering
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• 제8권3호
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• pp.273-276
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• 2010

Opportunistic spectrum access (OSA) allows unlicensed users to share licensed spectrum in space and time with no or little interference to primary users, with bring new research challenges in MAC design. We propose a cognitive MAC protocol using statistical channel information and selecting appropriate idle channel for transmission. The protocol based on the CSMA/CA, exploits statistics of spectrum usage for decision making on channel access. Idle channel availability, spectrum hole sufficiency and available channel condition will be included in algorithm statistical information. The model include the control channel and data channel, the transmitter negotiates with receiver on transmission parameters through control channel, statistical decision results (successful rate of transmission) from exchanged transmission parameters of control channel should pass the threshold and decide the data transmission with spectrum hole on data channel. The proposed protocol's simulation will show that proposed protocol does improve the throughput performance via traditional opportunistic spectrum access MAC protocol.

• 유통과학연구
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• 제14권11호
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• pp.129-138
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• 2016

Purpose - The ICT(information and communications technologies) development is affecting consumer behaviors on selecting channel or distribution system. This study aims to advance our knowledge about the factors influencing omni-channel behaviors. This study considers the positive brand experience as the moderating variable into the relationship between omini-channel use intention and consumer brand relation. Also, the effect of positive brand experience on consumer-brand relation is researched. Research design, data, and methodology - This study conducted an empirical test with the subject as customers who purchase goods or service through on-off cross channel simultaneously. The research model is developed from prior literatures about influencing variables on channel selection. The structure of this study is designed to identify causal relationships between the variables. 268 survey data from the questionnaire survey which is conducted to target customers who use online and offline channels, is used for empirical analysis. This study validates generality with descriptive statistics and data reliability with Cronbach's alpha value. The exploratory factor analysis is used for value purification. Then, the confirmatory factor analysis is conducted for structural equation modeling. Finally, the execute structural equation modeling is analyzed to confirm the hypotheses Results - First, the two causal influences between perceived performance risk and the propensity of omni-channel and between price consciousness and the propensity of omni-channel are verified through the empirical test. Second, the result identifies that the propensity of omni-channel is influenced on consumer-brand relationship. Third, the AMOS analysis proves that the moderating variable, positive brand experience, has significant positive impact on consumer-brand relationship. This significant relationship is highly supported by the regression analysis between brand experience and propensity of omni-channel because it results that positive brand experience has positive impact on the propensity of omni-channel. All hypotheses are verified to be true. Conclusions - Based on the empirical result, this study confirms that perceived performance risk and price consciousness are the important factors influencing propensity of omni-channel. According to the additional analysis, the moderating variable and positive brand experience plays important role between the propensity of omni-channel and consumer-brand relationship. Furthermore, positive brand experience influences more on consumer-brand relationship than non-positive brand experience.

• 복식문화연구
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• 제27권2호
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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.

• 혜화의학회지
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• 제14권1호
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• pp.149-154
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• 2005

I have come to next conclusions in consequence of documentary study about medical books of many generations regarding Medical treatment with Acupuncture Point of Flank pain. The urinary bladder channel of foot-taiyang is most used. Next there are the ren channel, the gall baldder channel of foot-shaoyang, the liver channel of foot-jueyin, the triple-warmer channel of hand-shaoyang, the kidney channel of foot-shaoyin, the stomach channel of foot-yangming, the spleen channel of foot-taiyin, the pericardium channel of hand-jueyin, the lung channel of hand-taiyin, the small intestine channel of hand-taiyang, the large intestine channel of hand-yangming, the heart channel of hand-shaoyin in the order of frequency in used channel among the twelve channels. The liver channel of foot-jueyin is most used. The gall baldder channel of foot-shaoyang, the urinary bladder channel of foot-taiyang, the triple-warmer channel of hand-shaoyang, the spleen channel of foot-taiyin, the stomach channel of foot-yangming, the ren channel, the small intestine channel of hand-taiyang, the kidney channel of foot-shaoyin, the pericardium channel of hand-jueyin, the large intestine channel of hand-yangming, the lung channel of hand-taiyin, the heart channel of hand-shaoyin in the order of frequency in used point among the twelve channels.

• 유통과학연구
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• 제14권11호
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• pp.91-102
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• 2016

Purpose - The objectives of this study are as follows. First, it aims to suggest an analysis model that has integrated the relationship between the two factors and export performance and conduct an empirical analysis of the factors. Second, the study seeks to analyze the mediating effect by setting direct channel governance as a specific activity to connect market orientation, a cultural asset, to export performance. Third, through these analyses, the study intends to apply the relationship between market orientation and direct channel governance that the existing studies have failed to observe comprehensively on SMEs in Korea. Based on these analyses, the study expects to expand the discussion of previous researches by analyzing the mediating effect of direct channel governance. Research design, data, and methodology - This study developed a model that has integrated market orientation, direct channel governance, and export performance. It established 7 hypotheses including the mediating effect of direct channel governance. Market orientation was consisted of customer orientation and competitor orientation, and 4 latent variables were measured by 18 questions. LISREL, an analysis tool of structural equation model, was used for hypothesis test and there were 183 sample for analysis. Results - The analysis results showed that customer orientation has a positive influence on direct channel governance, but competitor orientation did not have a statistically significant effect. On the contrary, export performance showed an opposite result. That is, customer orientation did not have any influence but competitor orientation had a significant influence on export performance. It was also confirmed that there was a significant influence in the relationship between channel governance and export performance. According to the analysis of mediating effect, direct channel governance had a full mediating effect between customer orientation and export performance. Conclusions - The study results demonstrated that it is important to build a direct channel governance on the export SMEs in Korea, especially since the direct channel governance complements the influence of customer orientation that does not directly influence export performance among market orientation activities. This implies that Korean export SMEs must strive to build an effective direct channel governance.