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      • KCI등재

        The Role of Information Search Cost on Seller's Disclosure of Negative Information

        Seung,Huh 중소기업융합학회 2021 융합정보논문지 Vol.11 No.4

        본 논문은 부정적 정보의 공개가 어떻게 단기간에 판매자의 수요를 증대시킬 수 있는지에 대한 경험적 분석을 통해 시장의 정보 불균형에 대한 중요한 이해를 제공하고자 한다. 이를 위해 본 연구는 기존의 관련 연구 결과에 더하여 정보 검색 비용이 부정적 정보 공개에 미치는 영향을 예측하고, 이러한 해석에 대하여 가상의 시장 거래를 통한 실험적 분석을 실시한다. 본 연구의 결과는 구매 위험도가 부정적 정보 검색에 중요한 역할을 하고 있는 반면 정보 검색 비용의 효과는 크지 않음을 나타내며, 특히 실험의 결과는 저품질의 제품을 판매하는 판매자가 어떻게 정보 공개를 통해 자신의 수익성 뿐 아니라 시장과 경쟁 제품의 수요를 증대시켜서 소비자 효용을 증대시킬 수 있는지를 보여준다. This study has attempted to provide an important understanding about the information asymmetry in markets through empirical analysis on how the disclosure of low quality can increase demand even in the short run. More specifically, this study has extended the previous findings from the related literature by considering the effect of information search cost and providing empirical evidences about the effect of voluntary disclosure of low quality, using an experimental method with purchase scenarios. The results from our analysis show that reduced perceived risk have an important effect on sharing negative information, while the effect of information search cost is minimal. We also explain the circumstances whereby the information disclosure of a seller with low-quality product can enhance not only the seller's profitability but also customers' welfare by increasing the market demand and the demand for the seller claiming high quality.

      • SCOPUSKCI등재후보

        Recent trends in intensity-modulated radiation therapy use in Korea

        Huh,,Seung,Jae,Park,,Won,Choi,,Do,Ho The Korean Society for Radiation Oncology 2019 Radiation Oncology Journal Vol.37 No.4

        Purpose: We aimed to analyze the trend in intensity-modulated radiation therapy (IMRT) use in Korea from 2011 to 2018. Materials and Methods: We collected data from the Health and Insurance Review and Assessment Service (HIRA) big data based on the National Health Insurance Service claims and reimbursements records using primary treatment planning codes (HD 041) for IMRT from 2011 to 2018. We analyzed the changing patterns in clinical application to specific tumor sites and regional differences in IMRT utilization. Results: The use of IMRT has exhibited an 18-fold steep rise from 1,921 patients in 2011 to 34,759 in 2018. With regard to IMRT in 2018, 70% of patients (24,248/34,759) were treated in metropolitan areas (Seoul, Incheon, and Gyeonggi Province). IMRT was most commonly used to treat breast, lung, and prostate cancers in 2018. Among these, the use of IMRT for breast cancer shows the most remarkable increase from 2016 when the National Health Insurance began to cover IMRT for all solid tumors. Conclusion: The use of IMRT is steadily increasing to treat cancer and is concentrated in metropolitan areas.

      • KCI등재

        The Short-Term Effect of Low-Quality Sellers' Voluntary Information Disclosure

        Seung,Huh 중소기업융합학회 2021 융합정보논문지 Vol.11 No.1

        본 논문은 시장에서 저품질의 제품을 판매하는 판매자가 언제, 그리고 어떠한 방식으로 품질에 대한 정보를 공개 함으로써 이윤을 증대시킬 수 있을지를 이해하고자 한다. 이를 위해 본 논문은 제품의 품질 및 가격, 고객의 위험 인식 수준, 위험과 관련된 비용, 위험에 대한 민감도 등의 요소를 반영한 새로운 이론 모델 분석을 통해 저품질의 제품을 판매 하는 판매자가 품질에 대한 부정적인 정보를 자발적으로 공개하여도 고객이 인식하는 위험 수준을 충분히 감소시킬 수만 있다면 단기간에 수요를 증대시킬 수 있음을 보여준다. 또한 본 이론 모델은 이러한 정보 공개가 고객의 위험 수준을 어떻게 조정하느냐에 따라 시장 전체 수요와 경쟁 제품의 수요까지도 증대시킬 수 있다는 점을 보여준다. 본 논문의 연구 결과는 제품의 부정적 요소에 대한 정보를 관리하는 마케팅 실무자 뿐 아니라 시장에서의 정보 불균형으로 인해 생기는 여러 문제점들을 해결하고자 하는 정책 담당자에게도 유의미한 시사점을 제공해 줄 것으로 기대된다. This study examines whether, when, and how sellers with low-quality products can instantly enhance profitability by fully disclosing quality information. Our analytic model has found that a low-quality seller can increase demand even in the short run by voluntarily sharing the information about its quality, if he can sufficiently reduce perceived risk of buyers. Moreover, a low-quality seller's information disclosure may increase both the market's and the competitor's demand, depending on the level of perceived risk. The finding of this study is expected to provide meaningful implications to managers and policy makers on solving market dilemmas under information asymmetry.

      • KCI등재

        The Truth about Sellers' Lies: Why Dishonesty Loses in Markets under Information Asymmetry

        Seung,Huh 강원대학교 경영경제연구소 2020 Asia-Pacific Journal of Business Vol.11 No.4

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

        Purpose - This study analyzes the effect of sellers' dishonesty on various market outcomes such as seller profit, buyer profit, and market welfare, through precisely measuring the level of sellers' information disclosure and its economic impacts. As an explicit observation of sellers' dishonesty is not easy in most other settings, this study is expected to suggest unique and meaningful implications on the effect of sellers' incomplete information disclosure to researchers, managers, and policy makers. Design/methodology/approach - In order to precisely measure the level of sellers' dishonesty under information asymmetry, this study analyzes the data from an incentive-based economic experiment using z-Tree software. This experimental method enables us to focus on the strategic interactions among participants, observe the integrity of seller's information disclosure, and reproduce real market situations. Findings - The analysis of sellers' dishonesty has provided the following important and counterintuitive findings about the reality of buyer-seller interactions under information asymmetry. First, sellers' lies do not affect seller profit even when they are very intensive. Second, sellers' dishonesty negatively affects buyer profit and the entire market welfare. Third, a seller's quality claim has a positive effect on the seller profit only when a seller is being honest. Research implications or Originality - This study analyzes sellers' dishonesty using incentive-based economic experiment using z-Tree software which provides a straightforward examination on dishonest behavior of sellers, that is not readily available with other types of observational or experimental data.

      • KCI등재

        Biologic Effect of Non-Ionizing Radiation

        Huh,Seung-Jae,Wu,Hong,Gyun 대한방사선 방어학회 1995 방사선방어학회지 Vol.20 No.3

        비전리 방사선의 인체에 대한 작용은 최근 우리주위에서 많이 사용되는 microwave, radio wave, laser, ultrasound wave, ultraviolet radiation 등의 문제가 될수 있으며 본고에서는 주고 Radio Frequency Electromagnetic(RFEM) spectrum의 shortwave 와 microwave 의 생물학적인 작용을 정리 발표하고자 한다. RFEM에 의한 carcinogenesis에 관해서는 아직 RFEM이 인체에서는 발암물질로서 작용한다는 보고는 없으나, cancer promotion에는 작용할 것으로 보고는 있다. chromosomal effect에 관해서는 체외실험에서 microwave에 의한 chromosome의 stickiness의 증가와 mitotic index의 변화에 관한 보고가 있다. 인체에서는 RFEM에 많이 피폭되었다고 알려진 Moscow의 미 대사관 직원 5000명을 대상으로 한 역학조사에서는 특별한 염색체 이상은 발견되지 않았다. 동구에서의 보고에 의하면 RFEM에 의한 선천성 기형아의 출산이 보고 된바 있으나 출산시의 통증을 줄이기 위한 2450 MHz의 microwave를 조사한 산모 2000명 출산아에서 기형은 없었다고 한다. 인간의 행동과 정서적인 측면에서 RFEM에 의한 변화는 1974년 Sadcikoda에 의해 기술된바 있는 "microwave sickness"는 irritability, 두통, 전신쇄약, 불면증, 성욕 감퇴 및 발기부전 등을 호소하는 중후군으로 주로 동유럽의 저자들에 의하여 보고되고 있으며 구 소련에서는 microwave sickness 또는 radio wave sickness는 확실한 하나의 임상병명으로 간주되고 있다. cataractogenesis에 관해서는 실험 동물에서 잘 연구되고 있으며, 사람에서도 1952년 레이다 작업종사자 에서 보고된 이후 50여례 이상의 보고가 있으나 백내장 자체가 그 발생 빈도가 높은 질환이고 많은 원인이 있으므로 아직 인간에서의 확신한 cataractogenesis에 관해서는 더욱 연구가 필요한 분야이다. radar wave에 노출된 적이 있는 군인을 대상으로한 미 해군의 역학조사에 의하여 radar wave에 의한 uveitis, retinitis와 비진행성 백내장등이 보고되고 있으나 딴 연구에서는 입증된바 없다. The Radio-frequency electromagnetic(RFEM) spectrum is defined as waves that range in frequency from>0 to 3 ×1012 Hz. Although there are several thousands of reports that present data or opinion of the biological response to RFEM radiation, no consensus has emerge4d reagrding thresholds and mechanisms of injury. This review presents a overview of the subject on mechanisms of interaction of RFEM fields with tissue, chromosomal and mutagenic effect, carcinogenic effects. The scope of the review is expanded to include systemic effects such as those on reproduction, growth and developement, hematological effects. some biological end opints, those with associated with behavior and cataractogenesis is discussed.

      • High Dose Rate Intracavitary Radiation Therapy for Head and Neek Tumors

        Huh,Seung,Jae 순천향대학교 1989 논문집 Vol.12 No.1

        A simple high dose rate intracavitary irradiation of carcinoma of the nasopharynx and maxillary antrum has been found useful as a supplementary radiation boost to the primary site. Local control of such head and neck tumors can be enhanced by employing this technique.

      • KCI등재

        Technology, Employment, and Cleansing Effects

        Hyeon-seung,Huh,Wongun,Song 한국경제연구학회 2015 Korea and the World Economy Vol.16 No.1

        This paper revisits the relationship between technology shocks and employment, which has caused considerable controversy since the appearance of Gali (1999). The organizing framework is cleansing effects, which posits recessions as the appropriate time for engaging in activities aimed at improving productivity. We examine the consistency of cleansing effects using G-7 data. Evidence reveals that the theoretical predictions from the cleansing effect are well supported across countries. Importantly, a positive technology shock increases employment, which is in contrast to the result of Gali. We also propose a simple test that can serve to distinguish between the cleansing and Gali models statistically. The test rejects the adequacy of Gali's specification in favor of the cleansing effect, with the possible exception of Japan.

      • KCI등재

        Testing the Uncorrelatedness of Aggregate Supply and Aggregate Demand Shocks in VAR Models

        Hyeon-seung,Huh 한국경제연구학회 2011 Korea and the World Economy Vol.12 No.1

        In structural vector autoregression models, the underlying shocks are assumed to be uncorrelated with one another. We examine the empirical relevance of this uncorrelatedness assumption in a wellknown model by Blanchard and Quah (1989). To derive a testable form, the Blanchard and Quah model is transformed into a cointegration representation. This alternative setup is extended to allow for testing of the uncorrelatedness between aggregate supply and aggregate demand shocks. Empirical evidence reveals that the two structural shocks are not correlated in any of the six G-7 countries under study. However, when a different identification scheme is adopted, they are correlated in some cases.

      • KCI등재

        Efficacy of Korean Medicine Combination Treatment on Recurrent Neck Pain After Medical Procedures: A Retrospective Study

        Hyo-Seung,Huh,Wu-Jin,Jeong,Ki-Tae,Park,Sun-Ho,Lee,Sun-A,Kim,Min-Kyung,Kim,Hye-Gyeong,Kim 대한침구의학회 2021 대한침구의학회지 Vol.38 No.1

        Background: The aim of this study was to evaluate the efficacy of Korean medicine combination treatment on recurrent neck pain after medical procedures. Methods: This retrospective study included 158 inpatients of the Daejeon Jaseng Hospital of Korean Medicine who were diagnosed with “Cervical disc disorder with radiculopathy (M50.1)” between December 14 th , 2017 and May 29 th , 2019. The patients were assigned to 1 of 2 groups based on whether they received medical procedures on the cervical spine at least once. Korean medicine combination treatment was evaluated using EuroQol-5 dimensions index (EQ-5D), numeric rating scale (NRS), and neck disability index (NDI) scores. Results: Before and after treatment, the patients who received medical procedures on the cervical spine at least once before admission (Group A) showed a statistically significant difference in the NDI and NRS scores but not in the EQ-5D scores. This was similar to the patients who had not received medical procedures on the cervical spine before admission (Group B) they showed a statistically significant difference in the NDI and NRS scores but not in the EQ-5D scores. When comparing the results of Group A and Group B before and after treatment, no statistically significant differences were observed in the EQ-5D, NDI, and NRS scores. Conclusion: Korean medicine combination treatment improves the neck functional disability of patients who suffer from recurrent neck pain despite patients having undergone medical procedures.

      • KCI등재

        하지정맥류 환자 및 정상인에서 대복재정맥의 기질 금속단백분해효소 및 금속단백분해효소-조직억제제의 발현도 분석

        허승(Seung Huh), 최향희(Hyang Hee Choi), 김형기(Hyung-kee Kim), 김상준(Sang Joon Kim) 대한외과학회 2010 Annals of Surgical Treatment and Research Vol.79 No.6

        Purpose: Although varicose veins are very common in adults, the mechanism of the disease has not been established. Degradation of the extracellular matrix is regulated by various matrix metallopreteinases (MMPs) and their inhibitors tissue inhibitor of metallaproteinase (TIMPs). This study was performed to analyse the relationship between venous wall degeneration and expression of these matrix proteinases. Methods: Twelve great saphenous vein (GSV) segments from 7 patients without varicose veins (control) and 86 GSV segments from 18 patients (22 limbs) with varicose veins (C2,4,5EPASPR) were used for this study. Light microscopic examination was used in the evaluation of vein wall degeneration, immunohistochemistry and Western blotting for the expression of MMPs (MMP-1, MMP-2, MMP-9 and MMP-13) and TIMPs (TIMP-1 and TIMP-2), and zymography for gelatinolytic activity of MMP-2 and MMP-9 were performed. Results: MMP-9 was more strongly expressed in the vein wall of both control and patient groups, especially in the endothelial cells and medial muscle layers and TIMP-2 followed. The expression of MMP-9 was closely related to the degree of venous wall degeneration. Activated MMP-2 and MMP-9 were observed in both groups and expressed more in the proximal GSV of the patients. In the Western blotting, the expression of MMP-9 and TIMP-1 were significantly higher than other MMPs and TIMP-2 in the patients with varicose veins. Conclusion: MMP-9 is much more expressed in the wall of degenerative veins. This matrix-degrading enzyme may play an important role in the degeneration of venous wall followed by its remodeling.

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