• 한국의류산업학회지
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• 제26권2호
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• pp.179-189
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• 2024

This study aims to explore the influence of product popularity signals on purchase intention in China's open market, with a focus on understanding the interaction effect of fashion product types. The popularity signals were measured through sales volume and review volume. For the experiment, a 2 (sales volume: high vs low) × 2 (review volume: high vs low) × 2 (fashion product type: trend vs basic) factorial design was employed. The findings of this study are summarized as follows. First, sales volume and review volume, as signals of the popularity of fashion products, did not appear to have a direct effect on purchase intention. Second, the impact of fashion product popularity on purchase intention was found to be contingent on the type of fashion product. When purchasing trendy fashion products, purchase intention was found to be higher under low popularity conditions compared to high popularity conditions. When purchasing basic fashion products, purchase intention was found to be higher under high popularity conditions compared to low popularity conditions. These findings contribute valuable insights for developing marketing strategies that leverage popularity signals for fashion products in China's open markets. Furthermore, the study improves understanding of online fashion product purchasing behavior among Chinese consumers.

• Journal of Chest Surgery
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• 제49권sup1호
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• pp.20-27
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• 2016

Background: This study analyzed the association between the volume of heart surgeries and treatment outcomes for hospitals in the last five years. Methods: Hospitals that perform heart surgeries were chosen throughout Korea as subjects using from the Health Insurance Review and Assessment Service. The treatment outcome of the heart surgeries was defined as the mortality within 30 postoperative days, while the annual volume of the surgeries was categorized. Logistic regression was used as the statistical analysis method, and the impacts of the variables on the heart surgery treatment outcomes were then analyzed. Results: The chance of death of patients who received surgery in a hospital that performed 50 or more surgeries annually was noticeably lower than patients receiving operations from hospitals that performed fewer than 50 surgeries annually, indicating that the chance of death decreases as the annual volume of heart surgeries in the hospital increases. In particular, the mortality rate in hospitals that performed more than 200 surgeries annually was less than half of that in hospitals that performed 49 or fewer surgeries annually. Conclusion: These results indicate that accumulation of a certain level of heart surgery experience is critical in improving or maintaining the quality of heart surgeries. In order to improve the treatment outcomes of small hospitals, a support policy must be implemented that allows for cooperation with experienced professionals.

• Imaging Science in Dentistry
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• 제53권2호
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• pp.91-99
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• 2023

Purpose: This systematic review aimed to investigate the correlation between chronological age and dental pulp volume in cone-beam computed tomography (CBCT). Materials and Methods: The literature was searched in 4 databases(PubMed, Scopus, Web of Science, and Google Scholar). Within each study, the outcome of interest was the correlation (r) between chronological age and pulp volume. A random-effect meta-analysis was conducted. Subgroup analysis was carried out according to sex and tooth type. Results: Of 5,693 identified studies, 27 fulfilled the inclusion criteria and were selected for meta-analysis. These articles focused on single-rooted teeth (n=21), multi-rooted teeth (n=6), maxillary teeth (n=14), mandibular teeth (n=6), and maxillary and mandibular teeth (n=12). The relationship between chronological age and dental pulp volume was examined in the entire population (r= -0.67), men (r= -0.75), and women (r= -0.77) in single- and multi-rooted teeth. The results of the total population analysis showed a relatively strong negative relationship between age and pulp volume. Conclusion: This study suggested that CBCT is a reliable and repeatable tool for dental age estimation. A strong inverse relationship was observed between pulp chamber volume and age. Further studies on the correlation between chronological age and pulp volume of multi-rooted teeth may be beneficial.

• 한국의학물리학회지:의학물리
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• 제35권1호
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• pp.1-9
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• 2024

Margin inclusion or exclusion remains the most critical and controversial aspect of stereotactic radiosurgery (SRS) for metastatic brain tumors. This review aimed to examine the available literature on the impact of margins in SRS of brain metastasis and to assess the response of some medical physicists on the use of these margins. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses method was used to review articles published in PubMed, Embase, and Science Direct databases from January 2012 to December 2022 using the following keywords: planning target volume, brain metastasis, margin, and stereotactic radiosurgery. A simple survey consisting of five questions was completed by ten medical physicists with experience in SRS treatment planning. The results were analyzed using IBM SPSS Statistics version 26.0. Of the 1,445 articles identified, only 38 articles were chosen. Of these, eight papers were deemed relevant to the focus of this review. These papers showed an increase in the risk of radionecrosis, whereas differences in local control were variable as the margin increased. In the survey, the response rate to whether or not to use margins in SRS, a critical question, was 50%. Margin addition increases the risk of radio necrosis. The local control rate varies among treatment modalities and cannot be generalized. From the survey, no consensus was reached regarding the use of these margins. This calls for further deliberations among professionals directly involved in SRS.

• 한국콘텐츠학회논문지
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• 제21권7호
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• pp.93-104
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• 2021

영화 흥행에 영향을 미치는 온라인 구전의 양과 방향성에 관한 선행연구들의 거의 대부분은 Yahoo Movies, IMDB.com, 네이버 영화 등에서 제공하는 실제 온라인 데이터(2차 데이터)를 사용하였다. 그러나 실제 온라인 데이터는 구전 제공자와 구전 수용자의 심리 변수나 특성 정보를 파악하기가 어렵기 때문에 실제 데이터를 사용한 선행연구들에서는 구전의 양 및 방향성과 소비자의 심리 변수 간의 인과관계를 파악할 수가 없었다. 본 연구에서는 선행연구의 이러한 한계를 보완하여 실제 데이터 대신에 설문조사를 통해 기존에 검증되지 않은 인과관계모형으로서 구전의 양과 방향성이 소비자 심리 변수이며 대표적인 구전 정보 특성인 리뷰 신뢰성을 매개변수로 하여 영화 관람의도에 미치는 직·간접적인 영향력을 검증하였다. 연구결과, 구전의 양과 방향성이 관람의도에 미치는 총효과는 각각 유의하였다. 그러나 구전의 양은 리뷰 신뢰성을 통해 관람의도에 미치는 간접적인 효과만이 유의한 반면에(완전매개효과), 방향성은 직접효과와 간접효과가 모두 유의한(부분매개효과) 차이가 나타났다. 이러한 연구결과에 대한 이론적, 실무적 시사점을 제시하였다.

• Journal of Smart Tourism
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• 제3권3호
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• pp.5-15
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• 2023

Given the increasing information overload among users of online review websites, understanding the manner in which cognitive costs are reduced and efficient information is made reliable has become increasingly important. This study targets a unique consumer review design and explores how reviews from an external peer-to-peer site embedded in an online travel agency (OTA) website influence subsequent evaluation behaviors. The empirical results indicate that (1) embedded external reviews with a high average valence tend to strengthen the influence of the positive evaluation ratio while diminishing the effect of the review volume, and (2) embedded external reviews with a large variance strengthen the positive effect of the review volume while weakening the effect of the positive evaluation ratio on subsequent positive evaluations. The findings provide practical insights for consumers and online platforms.

• 유통과학연구
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• 제15권9호
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• pp.85-93
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• 2017

Purpose - The volume and valence of online word-of-mouth(eWOM) have become an important part of the retailer's market success for a wide range of products. This study aims to investigate how the growth of eWOM has generated the product's final financial outcomes in the introductory period influences. Research design, data, and methodology - This study uses weekly box office performance for 117 movies released in the South Korea from July 2015 to June 2016 using Korean Film Council(KOFIC) database. 292,371 posted online review messages were collected from NAVER movie review bulletin board. Using regression analysis, we test whether eWOM incurred during the opening week is valuable to explain the last of box office performance. Three major eWOM metrics were considered after controlling for the major distributional factors. Results - Results support that major eWOM variables play a significant role in box-office outcome prediction. Especially, the growth rate of the positive eWOM volume has a significant effect on the growth potential in sales. Conclusions - The findings highlight that the speed of eWOM growth has an informational value to understand the market reaction to a new product beyond valence and volume. Movie distributors need to take positive online eWOM growth into account to make optimal screen allocation decisions after release.

• 한국시스템다이내믹스연구
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• 제16권1호
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• pp.75-91
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• 2015

The price-volume in land by land categories is evaluated with dynamic approaches in the era of aging society This research tries to investigate in the respect of major factors such as real estate, macro-economics, and population that is simulated by land categories. The system dynamics approaches on price-volume in land are forecasted until 2020 using the data in the period of 2000-2014. In regard to methodologies, this research adopted system dynamics to evaluate the relationships between price-volume in land and aging society. The meaningful results have been found during the last over 10 year's analysis as the dynamic relations with major factors. Regarding land categories, this research tries to overcome former research limitations. As an implication from the price-volume in land, it confirmed that the multifaceted aspects show that system dynamics approach effectively simulated them by price-volume in land with the population of aging society.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2009년도 춘계학술대회 논문집
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• pp.402-405
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• 2009

본 리뷰에서는 미국 DARPA가 극초음속 순항 비행체를 위하여 최근 시작한 정적연소 기반 극초음속 추진기관 개발 프로그램에 대하여 소개한다.

• 무역학회지
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• 제45권5호
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• pp.75-89
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• 2020

The purpose of this paper was to analyze the trend of container volume using the Seasonal Autoregressive Intergrated Moving Average (SARIMA) model. To this end, this paper used monthly time-series data of the East Sea Rim from 2001 to 2019. As a result, the SARIMA(2,1,1)12 model was identified as the most suitable model, and the superiority of the SARIMA model was demonstrated by comparative analysis with the ARIMA model. In addition, to confirmed forecasting accuracy of SARIMA model, this paper compares the volume of predict container to the actual volume. According to the forecast for 24 months from 2020 to 2021, the volume of containaer increased from 60,100,000Ton in 2020 to 64,900,000Ton in 2021