독립SO와 MSO의 시장행위 및 성과 분석

전혜선(Hye-Sun Jeon) 한국방송학회 2005 방송통신연구 Vol.- No.61

다채널 유료방송시장의 기업결합과 시장봉쇄

전혜선(Hye-Sun Jeon) 한국언론학회 2007 한국언론학보 Vol.51 No.3

This paper examined the current regulatory issues of MVPD(Multichannel Video Program Distribution) in making regulatory guidelines on setting size limit for MSO. In order to make more effective regulations on the horizontal integration in MVPD, this research investigated the level of integration on the lines of market foreclosure. The effect of economy of scale in system operators(SO) by horizontal integration and market foreclosure effect limiting program providers(PP)' access to final audience had been dealt with by theoretical model building and empirical tests. This article simulated the effect of MSO's market foreclosure on PP's profits. As a result of the analysis, this study showed that 30~35% could be the optimal level of integration and in this case the MVPD market definition should include both cable TV and satellite broadcasting. Policy-makers could decide on different policies in order to make a satisfactory profit for PP focusing diversity of channels and broadcasting contents and in order to improve audience's access to the broadcasting platform services by making an investment in digital technology and equipment. The regulation of restrictions on integration in MVPD could be eased in case the definition of MVPD market was extended to satellite broadcasting.

케이블TV시장구조(독점과 경쟁)에 따른 행위 및 성과 분석

전혜선(Hye-Sun Jeon) 한국언론학회 2005 한국언론학보 Vol.49 No.5

The cable television market of Korea had started as the form of monopolistic market structure, but through merger and acquisition to RO(Replay Operator), now it has become competitive market structure where 54% of franchise area and 66.3% of SO(system Operator) are operating two SOs in the same franchise area. As a result, 119 operators in 77 franchise area have been operating in monopolistic or competitive way. In this research, therefore, the effect of monopoly and competition in cable television market will be examined according to its market structure, market conduct, and market performance. In competitive area, it will be examined focusing on the intensity and type of competition, and the degree of integration among SOs. The findings are as follows. Introduction of competition to the cable television market in Korea which was monopolistic originally, but now became competitive market, resulted in providing subscribers cheaper service fee, more channels, and even channel diversity. In the meantime, competition reduced the firm performance considering the aspect of business. To sum up, competition worked favorably to general consumer, but not to business owner.

케이블TV SO의 수평적 기업결합 사례분석

전혜선(Hye-Sun Jeon) 한국방송학회 2007 한국방송학보 Vol.21 No.4

방송평가제의 쟁점과 전망

전혜선(Hye-Sun Jeon) 한국언론학회 2008 한국언론학보 Vol.52 No.1

This article investigated issues and prospects for the policy of broadcast evaluation in South Korea. The broadcast evaluation policy was introduced in 2000 by the revision of the Broadcasting Act to enhance broadcasters' public responsibility and improve the quality of broadcasting programs after a lot of discussion about the need for an evaluation system. The Broadcast Evaluation Committee is composed and operated under the article 31 of the Broadcasting Act and the Rules of Broadcast Evaluation. The evaluation of broadcast by the Korean Broadcasting Commission(KBC) has considerable effect on the license renewal according to the article 17 of the Broadcasting Act. In this process, broadcasters has raised several issues on the broadcast evaluation policy. This article examined the current issues such as whether the Broadcasting Act is against the Constitution and whether the KBC's evaluation on broadcasters' operation violates the Broadcasting Act etc. The broadcast evaluation by the KBC, which is responsible for the overall governance of the broadcasting sector including licensing, is appropriate. The investigation on issues will give an aid to recognize the problems and improve the efficiency of this evaluation system. In addition, this research showed that broadcast evaluation would be understood as a system not for violating broadcasters' interest but for ensuring the right of viewers.

미디어시장의 ‘경쟁’과 지상파TV ‘프로그램의 질’에 관한 연구

전혜선(Hye-Sun Jeon) 한국언론학회 2009 한국언론학보 Vol.53 No.4

This article is to examine the current broadcasting policy contributes to improve broadcasting program quality and programming diversity for viewers by making market structure competitive and leading to fair competition. In earlier studies, it was found that the increase in the number of broadcasters and broadcasting channels has no direct or little influence on the terrestrial TV programming. This study analyzes how the percentage of production cost compared to the sales has been changed assuming that there is the correlation between the increase of production cost and better program quality. In addition, the change in the percentage of first-run programming is analyzed considering that viewers can have more diverse program choices according to the increase in first-run programming. The result shows that the percentage of production cost compared to the sales in 3 major broadcasters has increased steadily except KBS with public funding. Especially the production cost of SBS has increased significantly. The percentage of first-run programming in 4 channels of 3 major broadcasters has all decreased. The percentage of first-run programming of SBS is much higher than that of other channels and the decrease in percentage is the smallest among channels. Based on these results, it is revealed that 3 major broadcasters invest intensively in a small number of programs in competitive market. Especially SBS is taking more active action in the competitive media market by spending more production cost and maintaining the percentage of first-run programming.

방송프로그램 품질평가지수에 관한 비교 연구 -KBS의 품질평가지수, MBC의 QI, SBS의 ASI를 중심으로-

전혜선 ( Hye Sun Jeon ) 순천향대학교 사회과학연구소 2009 사회과학연구 Vol.15 No.2

본 연구는 1) 각 방송사의 프로그램 품질평가 조사결과들 사이의 관계, 2) 품질평가 조사결과와 시청률 사이의 관계, 3) TV채널에 따른 품질평가 조사결과들 사이의 관계를 분석하였다. 분석결과, KBS-품질평가와 MBC-QI, 그리고 SBS-ASI 조사결과는 모두 매우 유의미한 상관관계를 지니는 것으로 나타났으며, 특히 오락 프로그램의 경우 더욱 높은 상관관계를 나타냈다. 시청률과 KBS-품질평가, 그리고 MBC-QI 사이에는 통계적으로 유의미한 상관관계가 없는 것으로 분석된 반면 SBS-ASI는 시청률과 매우 높은 정(+)적인 상관관계를 보였다. 끝으로 KBS-품질평가와 MBC-QI는 TV채널에 따라 통계적으로 유의미한 차이를 보였으나, 프로그램 유형에 따른 차이가 훨씬 더 큰 것으로 분석되었다. 이러한 결과는 프로그램에 대한 품질평가가 방송사별로 각기 다른 지수에 의해 조사되지만 시청자들의 평가결과는 매우 유사하다는 것을 의미한다. 특히 각방송사의 지수조사 결과들은 보도나 교양 프로그램에 비해 오락 프로그램에서 더 유사한 것으로 나타났다. 시청률과 프로그램 품질평가 조사결과 사이의 관계를 분석환 결과 역시 오락 프로그램에서 더 높은 것으로 분석되었다. This study analyses the relationship between the program quality indexes of each broadcasters, the relationship between the results of program quality assessment and program ratings, and the difference between the results of program quality assessment of each TV channels. The effect of program types on the results of assessment is also examined. The Quality Index of KBS, the Quality Index of MBC, and the Audience Satisfaction Index of SBS have very meaningful correlation, and higher correlation is indicated in index for entertainment programs. It shows that program ratings and the Quality Indexes of KBS and MBC don`t have statistically significant correlation whereas the Audience Satisfaction Index of SBS has very positive correlation with program ratings especially in case of entertainment programs. The Quality Indexes of KBS and MBC have statistically meaningful difference depending on TV channels, but it is analysed that there is much bigger difference, depending on program types, in the Quality Indexes of KBS and MBC. These results mean that the outcomes of each broadcaster`s program quality assessment are quite similar in spite of its different survey questions and especially the outcomes for entertainment programs are much more similar. In addition, the relation of program ratings to the program quality assessment tends to be different according to program types and broadcasters conducting research. If the rating of an entertainment program is high, it is possible that program quality assessment has greater possibility of showing better result.

펄스자기장이 위팔 두갈래근의 지연성 근육통에 미치는 영향

강선영(Sun-young Kang),박주희(Joo-hee Park),전혜선(Hye-seon Jeon),이현숙(Hyun-sook Lee) 한국전문물리치료학회 2013 한국전문물리치료학회지 Vol.20 No.2

Delayed onset muscle soreness (DOMS) is a painful condition that arises from exercise-induced muscle damage after unaccustomed physical activities. Various therapeutic interventions have been applied to reduce the intensity and duration of DOMS-related symptoms. Recently, pulsed electromagnetic field (PEMF) intervention has been introduced as an alternative noninvasive treatment for DOMS. This randomized, double-blind, placebo-controlled experiment was conducted to examine the effects of PEMF therapy on DOMS in elbow flexors at 24, 48, and 72 hours after the experimental DOMS induction. Thirty healthy volunteers (23±2.4 yrs, 175±5.7 ㎝, and 74±7.8 ㎏) participated in this study. Each was randomly assigned to a PEMF or placebo group. On the first day, DOMS was induced in the elbow flexors by repeated isokinetic motions at low (60 °/s) and fast (120 °/s) speeds in all subjects. Thereafter, the PEMF group received 15-min daily treatment with a PEMF device. The placebo group received sham treatment of the same duration. Overall, PEMF application was more effective than the sham treatment in reducing the physiological symptoms associated with the DOMS including perceived soreness, median frequency, and electromechanical delay of the surface electromyography. In addition, median frequency and isokinetic peak torque of the PEMF group recovered to the pre-DOMS induction level earlier than the placebo group. In conclusion, this study suggests that PEMF can be applied as a new recovery strategy in reducing DOMS symptoms. Further experiments are required to examine the effect of the PEMF treatment on different types of exercise conditions and to determine the optimal treatment dosage and duration in a real clinical setting.

직업성 만성요통 환자와 정상성인에서 동요 유발 시 근 수축 개시시간 비교

노경선 ( Kyung Sun Roh ),권오윤 ( Oh Yun Kwon ),이충휘 ( Chung Hwi Yi ),전혜선 ( Hye Seon Jeon ) 한국전문물리치료학회 2007 한국전문물리치료학회지 Vol.14 No.2

젊은성인 엄지발가락가쪽휨증의 발허리발가락관절 각도와 엄지벌림근의 관계

강선영,정성대,김문환,전혜선,Kang, Sun-Young,Choung, Sung-Dae,Kim, Moon-Hwan,Jeon, Hye-Seon 대한물리치료학회 2014 대한물리치료학회지 Vol.26 No.2

Purpose: The aim of this study was to investigate relationship between the angle of the first metatarsophalangeal joint (1st MPJ) and the dimensions of the abductor hallucis; dorso-plantar (DP) thickness, medio-lateral (ML) width, and cross-sectional area (CSA), in subjects with and without hallux valgus. Methods: Sixty feet, mean (SD) age of 22.5 (2.1) years old, were included in this study (hallux valgus = 30; control = 30). An X-ray device was used for measurement of the angle of the 1st MPJ, and an ultrasound system was used for determination of mean (SD) DP thickness, ML width, and CSA of the abductor hallucis muscle in each foot from three trials. Results: The results showed the DP thickness, ML width, and CSA of the abductor hallucis did not differ significantly between subjects with and without hallux valgus. In addition, the correlations between the angle of the 1st MPJ and DP thickness, ML width, and CSA of the abductor hallucis showed poor correlation (Pearson r=-0.09, -0.20, and -0.18, respectively). Conclusion: Based on these findings, we speculate that morphological changes to the abductor hallucis muscle cannot be representative of the angle of the 1st MPJ, and also cannot be used in differentiation between subjects with and without hallux valgus.