제품 온라인 리뷰에 대한 고객의 지각역량이 유용성과 신뢰 및 구매의도에 미치는 영향 – 정교화가능성모델을 중심으로 -

정현석 글로벌경영학회 2022 글로벌경영학회지 Vol.19 No.6

This study examines the effect of customers' capability of online product reviews and trust, usefulness, and purchase intention for consumers using e-commerce. To this end, using the elaboration possibility model, the theories of central cues and peripheral cues, trust, usefulness, and purchase intention were explained as customer' perceived cabilities, and the relationship between them was verified theoretically and empirically. The proposed research model and developed hypotheses were tested using structural equations modeling based on data collected from 306 customers with experience in e-commerce. The results of the study confirm first, the central clue derived a positive (+) effect on usefulness and trust. Second, peripheral cues derived positive (+) effects on usefulness and trust. Last, usefulness and trust derived a positive (+) effect on intention to use. The study provides On a theoretical level valuable insights into the consumer's capability that are the base for judging the quality of online reviews in research related to online reviews, which is increasing in recent years. On a practical level, this study has the following implications. Businesses can help consumers check online reviews.but there is also a limitation that the is demographic limited. 본 연구는 전자상거래를 사용하는 소비자를 대상으로 제품 온라인 리뷰에 대한 고객의 지각역량이 신뢰와 유용성 및 구매의도에 어떤 영향을 미치는지를 분석하고자한다. 이를 위해 정교화가능성모델을 활용하여 고객지각능력으로 중심단서와 주변단서, 신뢰, 유용성, 구매의도에 대한 이론을 설명하고 이들 간의 관계를 이론 및 실증적으로 검증하였다. 본 연구의 분석을 위해 2022년 10월 5일부터 20일까지 수집한 306부의 데이터를 이용하여 SPSS 23, AMOS 23을 활용한 구조방정식 분석을 실시하였다. 실증분석 결과 첫째, 중심단서는 유용성 및 신뢰에 정(+)의 영향을 미치며, 둘째, 주변단서는 유용성 및 신뢰에 정(+)의 영향을 미치며, 셋째, 유용성 및 신뢰는 사용의도에 정(+)의 영향을 미치는 것으로 분석되었다. 본 연구의 결과는 최근 늘어나는 온라인 리뷰와 관련된 연구에서 온라인 리뷰 품질의 판단에 근거가 되는 소비자의 역량이 무엇인지 확인하고 실증적으로 분석하였다는 점에서 학문적/실무적 시사점을 가진다. 비록 기업에서 소비자의 온라인 리뷰를 확인할 때 도움을 줄 수 있는 실무적 시사점이 있지만 인구통계학적 한계가 존재한다는 점에서 향후 보완적인 연구가 진행되어야 할 것이다.

스틸하우스 경량형강 바닥의 진동특성 분석

정현석,이승은 대한건축학회 2000 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.20 No.2

Construction of residential buildings using light gauge steel framing has become today popular in Korea and is gaining wider acceptance as its framing system is applied to other buildings. All research projects carried out by RIST in the field of Steel house have a common objective : lower the construction cost while providing better housing performance. in order to meet this objective, many researches have been carried out, and in view of optimizing the construction process of steel-framed housing. In order to provide designers and builders with various floor design types, especially using dry construction method to achieve a fully panelized method, which otherwise cannot be met when using wet floor system, 2 dry floor systems and 1 improved wet floor system are developed and evaluated. The evaluation of performance consisted of vibration property of the floor structure. Ohlsson's vibration theory was applied in order to compare results with the vibration criterion set by the Japanese institute of Architecture.

시설원예용 비닐하우스 강도 보강을 위한 삽입물에 관한 연구

정현석 대한산업공학회 2009 대한산업공학회 추계학술대회논문집 Vol.2009 No.10

Green house is very useful structure for farmers because of their easiness of installation and low cost. However, many green houses are damaged from heavy snow fall every year. It means farmers have to undertake the economic loss. The purpose of this research is to propose a method that will be effective to protect the green house from heavy snow fall. Especially to develop a reinforcement method of a pipe used in the green house is the main focus. The various insert material in a pipe is considered and simulated.

비닐하우스 보온 시스템 개발에 관한 연구

정현석,김태훈 대한산업공학회 2009 대한산업공학회 추계학술대회논문집 Vol.2009 No.10

Miryang in Gyungnam district has 1,000 green house for pepper. And the pepper of this area is very famous because of the taste. Every farmer has taken an effort to reduce the maintenance cost. The heating cost takes the biggest portion. Naturally, farmers are eager for finding the most efficient boiler and heating system. This research is concerned about to develop more efficient heating system. To do so, we measured the efficiency of the existing heating system and the surveyed the structure of a green house. We proposed a system with steam boiler with heat storage tank.

화재 감지 시스템을 위한 MLOps 시스템 구조

정현석,최지헌,박종원,백세희,오상윤 한국차세대컴퓨팅학회 2023 한국차세대컴퓨팅학회 학술대회 Vol.2023 No.06

본 논문은 화재 상황에서 효율적이고 신속한 대응을 위한 화재 감지 시스템을 위한 MLOps 시스템 구조를 제안한다. 현재 재난 피해를 최소화하기 위해 기계학습 모델을 활용하는 연구들은 활발하나, 이를 위한 MLOps 시스템 구조에 대한 연구는 부족한 상황이다. 본 연구에서는 화재 상황에 대해 MLOps 기술을 활용하여 지속적인 모델 운영 및 관리를 가능하게 하는 시스템 구조를 제안한다. 제안 구조는 모델 학습 시간과 지연 시간을 고려한 DR 스케줄러를 통해 태스크를 효율적으로 스케줄링 한다. 향후 연구로 제안된 구조를 기반으로 시스템을 구축하고 효율성을 검증할 계획이다.

한국제약산업에서의 혁신활동이 기업성과에 미치는 영향

정현석,음수민,이철웅 대한산업공학회 2019 대한산업공학회 춘계학술대회논문집 Vol.2019 No.4

칡뿌리의 페놀성 화합물의 생물학적 활성

정현석,안원영 서울大學校 農科大學 演習林 1997 서울大學校 農科大學 演習林報告 Vol.1997 No.33

『꾸란』의 내세관을 통해본 사후 영혼의 존립 가능성 ― 아베로에스는 사후 영혼의 존립가능성을 부인했는가?

정현석 대동철학회 2012 大同哲學 Vol.61 No.-

아베로에스의 『모순의 모순』에 등장하는 개별적 영혼의 불사성 및 내세에 대한 논의는 그의 단일지성론 및 인간학적 논의와 종종 상충되는 것처럼 이해되어 왔다. 본 소고(小考)에서는 『모순의 모순』, 특히 이 책의 19장에서 논하는 개별적 영혼의 불사성에 대한 논의, 특히 수면에 대한 비유가 『꾸란』의 사후관 및 내세관은 물론 아베로에스의 철학적 입장과 어긋나지 않으며, 오히려 아베로에스가 자신의 사상을 전개하며 염두에 뒀던 철학과 종교와의 조화 및 상호보완적 관계를 드러내는 대표적인 예임을 드러내고자 한다. Averroès, dans son œuvre L'Incohérence de l'Incohérence, nous fournit des discussions sur l'immortalité de l'âme humaine qui nous semblent aller à l’encontre de sa propre position philosophique qui est marquée par sa notoire théorie de l’unicité de l’intellect. Dans cet article, en analysant plus près de ces discussions de L'Incohérence de l'Incohérence, en particulier celles établies sur la métaphore du sommeil, nous montrent qu’elles sont des moments où Averroès, un penseur qui vise à nous faire voir la relation intime entre la religion et la philosophie, cherche le moyen de se faire harmoniser la philosophie et la religion pour que les deux peuvent se complémenter pour le bien ultime de la vie humaine.

혼합 작동 유체를 이용한 진동 세관형 히트 파이프의 압력 진동과 열전달 특성에 관한 연구

정현석,김정훈,김주원,김종수,Jeong, Hyeon-Seok,Kim, Jeong-Hun,Kim, Ju-Won,Kim, Jong-Su 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.2

In this paper, heat transfer and pressure oscillation characteristics on oscillating capillary tube heat pipe(OCHP) according to input heat flux, mixture ratio of working fluid and inclination angle were investigated and were compared single working fluid(R-142b) with binary mixture working fluid(R-142b-Ethano1). OCHP was made to serpentine structure of loop type with 10 turns by drilling the channels of length 220mm, width 1.5mm, and depth 1.5mm on the surface of brass plate. In this study, R-l42b and R-l42b-Ethanol were used as working fluids, the charging ratio of working fluids was 40(vol.%), the input heat flux to evaporating section was changed from 0.3W/㎠ to 1.8W/㎠, and mixture ratio of working fluid was R(100%), R(95%)-E(5%), R(90%)-E(10%), and R(85%)-E(15%). From the experimental results, it was found that the effective thermal conductivity of single working fluid was better than that of binary mixture working fluid. But, in case of binary mixture working fluid, critical heat flux was higher than that of single working fluid. And, the higher the mixture ratios of working fluid, the lower heat transfer performance. In case of pressure oscillation, as the inclination angle was lower, pressure wave was more irregular. These phenomena were more serious when the working fluid was binary mixture. Besides, when mixture ratio was higher, saturated pressure was increased, more irregular wave was observed and the mean amplitude was increased. For the same input heat flux, inclination angle and charging ratio, when pressure oscillation has sinusoidal wave, mean amplitude was small, and saturated pressure was low value, the heat transfer was excellent.

A pilot clinical study of low-intensity transcranial focused ultrasound in Alzheimer’s disease

정현석,Im Jooyeon Jamie,Park Jong-Sik,Na Seunghee,Lee Wonhye,Yoo Seung-Schik,송인욱,Chung Yong-An 대한초음파의학회 2021 ULTRASONOGRAPHY Vol.40 No.4

Purpose: Increasing attention has been paid to low-intensity transcranial focused ultrasound (tFUS) for its potential therapeutic effects in Alzheimer's disease (AD). While preclinical studies have shown promising therapeutic effects of low-intensity tFUS in AD models, its efficacy and safety remain unclear in humans. In this pilot study, we investigated the effects of low-intensity tFUS on blood-brain barrier opening, the regional cerebral metabolic rate of glucose (rCMRglu), and cognition in patients with AD. Methods: After receiving institutional review board approval, four patients with AD received tFUS to the hippocampus immediately after an intravenous injection of a microbubble ultrasound contrast agent. Sonication was delivered at low-intensity, at a pressure level below the threshold for blood-brain barrier opening. Patients underwent brain magnetic resonance imaging, 18F-fluoro-2-deoxyglucose positron emission tomography, and neuropsychological assessments before and after the tFUS procedure. A whole-brain voxel-wise paired t test was conducted to compare rCMRglu before and after tFUS. Results: The sonication, as anticipated, did not show evidence of active blood-brain barrier opening on T1 dynamic contrast-enhanced magnetic resonance imaging. rCMRglu in the superior frontal gyrus (P<0.001), middle cingulate gyrus (P<0.001), and fusiform gyrus increased after tFUS (P=0.001). Patients demonstrated mild improvement in measures of memory, executive, and global cognitive function following tFUS. No adverse events were reported. Conclusion: These results suggest that hippocampal sonication with low-intensity tFUS may have beneficial effects on cerebral glucose metabolism and cognitive function in patients with AD. Further larger studies are needed to confirm the therapeutic efficacy of tFUS in AD. Purpose: Increasing attention has been paid to low-intensity transcranial focused ultrasound (tFUS) for its potential therapeutic effects in Alzheimer's disease (AD). While preclinical studies have shown promising therapeutic effects of low-intensity tFUS in AD models, its efficacy and safety remain unclear in humans. In this pilot study, we investigated the effects of low-intensity tFUS on blood-brain barrier opening, the regional cerebral metabolic rate of glucose (rCMRglu), and cognition in patients with AD.Methods: After receiving institutional review board approval, four patients with AD received tFUS to the hippocampus immediately after an intravenous injection of a microbubble ultrasound contrast agent. Sonication was delivered at low-intensity, at a pressure level below the threshold for blood-brain barrier opening. Patients underwent brain magnetic resonance imaging, 18F-fluoro-2-deoxyglucose positron emission tomography, and neuropsychological assessments before and after the tFUS procedure. A whole-brain voxel-wise paired t test was conducted to compare rCMRglu before and after tFUS.Results: The sonication, as anticipated, did not show evidence of active blood-brain barrier opening on T1 dynamic contrast-enhanced magnetic resonance imaging. rCMRglu in the superior frontal gyrus (P<0.001), middle cingulate gyrus (P<0.001), and fusiform gyrus increased after tFUS (P=0.001). Patients demonstrated mild improvement in measures of memory, executive, and global cognitive function following tFUS. No adverse events were reported.Conclusion: These results suggest that hippocampal sonication with low-intensity tFUS may have beneficial effects on cerebral glucose metabolism and cognitive function in patients with AD. Further larger studies are needed to confirm the therapeutic efficacy of tFUS in AD.