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스마트워크 환경에서 스마트 기기 활용에 따른 사용자 저항과 개인 생산성에 관한 연구
박상철 ( Sang Cheol Park ),채성욱 ( Seong Wook Chae ) 한국정보시스템학회 2014 情報시스템硏究 Vol.23 No.3
This study draws on status quo bias theoretic perspective as a meta-theoretic lens to explain why individuals have resists to adopt smart devices for their tasks. More specifically, we attempted to examine the relationships among user``s resist, perceived usefulness and individual productivity in the smart work context. By employing the status quo bias theoretic perspective, we develop and test our research model by using a survey data from 235 individual users. We demonstrate that satisfaction on the current state influence users`` resist, and also the users`` resist is mediated by perceived usefulness on individual productivity. From the status quo bias view, this study presents an alternative meta-theoretical lens in order to understand individuals`` resist in the smartwork context.
강바닥판 사장교의 폐단면 세로리브 내부 부식 원인 및 보강 방안
진상호 ( Jin Sang-ho ),주형석 ( Ju Hyeong-seok ),박승수 ( Park Sung-su ),채성욱 ( Chae Sung-wook ),이승철 ( Le Seung-chul ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1
The purpose of this study is to investigate the causes of corrosion of steel plate deck longitudinal U-ribs and to investigate the reinforcement method. It was confirmed that the corrosion of the longitudinal U-ribs occurred due to penetration water of the bolt hole of the shear key used in construction. The longitudinal U-ribs which were corroded were stiffened by attaching reinforcing plates, and finishing treatment was performed to prevent the surface water from flowing into the inside.
DNA 염기서열과 미각패턴 분석을 이용한 사상자와 벌사상자의 감별
김영화 ( Young Hwa Kim ),김영선 ( Young Seon Kim ),채성욱 ( Sung Wook Chae ),이미영 ( Mi Young Lee ) 대한본초학회 2013 大韓本草學會誌 Vol.28 No.6
Objectives: Cnidii Fructus is prescribed as the fruit of Cnidium monnieri (L.) Cusson or Torilis japonica (Houtt.) DC. in Korea pharmacopoeia. Although there are differences in the composition of useful components, two species have been used without distinction. In order to discriminate them, DNA sequencing and taste pattern analysis were used in this study. Methods : Primers ITS 1 and ITS 4 were used to amplify the intergenic transcribed spacer(ITS) region of nuclear ribosomal DNA from seven T. japonica and six C. monnieri samples. Taste pattern of samples were measured by using taste-sensing system SA402B equipped with five foodstuff sensors(CT0, C00, AAE, CA0, and AE1). The five initial taste(sourness, bitterness, astringency, umami, and saltiness) and three aftertaste(aftertaste of bitterness, astringency, and umami) of two species were compared. Results : According to the results of ITS region sequence analysis, two species showed 94 base pairs differences. The similarity of two sequences was 85%. From the taste pattern analysis, sourness, bitterness, aftertaste of bitterness(aftertaste-B), and umami showed a different pattern. Especially, bitterness and aftertaste-B of C. monnieri were significantly higher than T. japonica. In addition, two species were shown to have two markedly different clustering by these two flavors. Conclusion : T. japonica and C. monnieri were effectively discriminated using DNA sequencing and taste pattern analysis. These methods can be used to identify the origin of traditional medicine in order to maintain therapeutic efficacy.
이혜원(Lee Hye-Won),박소영(Park So-Young),추병길(Choo Byung-Kil),채성욱(Chae Sung-Wook),이아영(Lee A-Yeong),김호경(Kim Ho-Kyoung) 한국한의학연구원 2007 한국한의학연구원논문집 Vol.13 No.3
Objective : Polygonum multiflorum Thunberg (Polygonaceae) has been traditionally used as a tonic and the purgative in China and Korea. The genus Polygonum is a source of a wide range of phenolic compound, flavanoids, anthraquinones, stilbenes and tannins. In this study, three anthraquinones were isolated and quantitative determination of anthraquinones from P multiflorum has been developed for quality standardization. Methods : Three anthraquinone derivatives were isolated from a methanol extract of the radix of P. multiflorum by the chromatographic separation. Their structures were identified as emodin, physcion and ω-hydroxyemodin on the basis of spectral data (MS, 1H-NMR, 13C-NMR) and chemical analysis. HPLC analysis was performed to determine the contents of emodin, physcion, chrysophanol, rhein and ω-hydroxyemodin in P multiflorum from different specimens were collected from twenty Korean markets. Results : According to the results, the contents of emodin, physcion, chrysophanol, rhein and ω-hydroxyemodin were 0.145%, 0.434%, 0.016%, 0.026%, 0.030% by HPLC, respectively. Conclusions : In these results, we have determined the contents of emodin, physcion, chrysophanol, rhein and ω-hydroxyemodin in P. multiflorum, respectively. We hope that this study will contribute to the standardization and quality control of herbal medicine.
미각센서를 이용한 중국산 감초와 우즈베키스탄산 광과감초의 감별
최고야 ( Go Ya Choi ),김영화 ( Young Hwa Kim ),채성욱 ( Sung Wook Chae ),이혜원 ( Hye Won Lee ),고병섭 ( Byoung Seob Ko ),이미영 ( Mi Young Lee ) 대한본초학회 2011 大韓本草學會誌 Vol.26 No.1
Objectives: Genetic analysis and taste pattern were performed to identify species between Glycyrrhiza uralensis and G. glabra which are officially listed in Korean Pharmacopoeia Ⅸ as origin of Gamcho(gancao, licorice root, Glycyrrhizae Radix et Rhizoma). Methods: Genetic analysis showed that identification between two species was done by comparing base sequence of ITS(intergenic transcribed spacer) and trnH-psbA regions from eleven Gamchoes sold in market. There was different taste pattern using by taste sensor in Glycyrrhiza uralensis and G. glabra. Results: Genetic analysis showed that six Gamchoes from China were identified as Glycyrrhiza uralensis and five Gamchoes from Uzbekistan were G. glabra. From the results of taste pattern, sourness and astringency of Glycyrrhiza uralensis from China were significantly higher than G. glabra from Uzbekistan, and aftertaste of astringency, aftertaste of umami, and saltiness of Glycyrrhiza uralensis were signicantly low as compared to G. glabra. There is no significant difference between two species in terms of bitterness, aftertaste of bitterness, and umami. Conclusions: Taken together, Glycyrrhiza uralensis from China and G. glabra from Uzbekistan were identified by taste sensor, and this technic could be applied to establishment of taste pattern marker for identification of different species located in various regions.
최고야 ( Go Ya Choi ),고병섭 ( Byoung Seob Ko ),이미영 ( Mi Young Lee ),채성욱 ( Sung Wook Chae ),김영화 ( Young Hwa Kim ),육진아 ( Jin Ah Ryuk ),백지성 ( Ji Seong Baek ),이혜원 ( Hye-won Lee ) 대한본초학회 2011 大韓本草學會誌 Vol.26 No.1
Objective: This study was to compare antioxidant activity and HPLC pattern analysis from 4 species of changpo(changpu). Methods: To compare the antioxidant activity and HPLC pattern analysis from the 4 species of changpo, we performed the in vitro anti-oxidative activity assays and HPLC analysis from 70% ethanol extracts of Acorus gramineus Sol. (=AG), A. tatarinowii Schott (=AT), A. calamus L. (=AC) and Anemone altaica Fisch. ex C.A.Mey (=AA) taken in the herbal medicine market of Korea. Results: AG has the most effective anti-oxidative activity among 4 species of changpo. As the HPLC pattern analysis, AT was detected the unknown peak at retention time 14.9 min whereas AG was not showed any peak at the same retention time. These results suggest that AG could be used rather than AT when it need to be prescribed as anti-oxidative medicine. Conclusions: This result can be used as the basic data contributing to the stability of AG according to an appropriate clinical application.
강민구 ( Min Gu Kang ),김영화 ( Young Hwa Kim ),임아랑 ( A Rang Im ),남병수 ( Byung Soo Nam ),채성욱 ( Sung Wook Chae ),이미영 ( Mi Young Lee ) 대한본초학회 2014 大韓本草學會誌 Vol.29 No.2
Objectives : Chronic mild stress (CMS) model is currently recognized as a better animal model of depression. The purpose of this study was to investigate the antidepressant-like effects of the Nelumbo nucifera leave extract using CMS model. Methods : The antidepressant-like effects of Nelumbo nucifera leaves extract was determined by using animal models of depression. Male ICR mice were divided into four groups: saline-treated normal, without CMS; saline-treated stress control; CMS+ Imipramine(20mg/kg); CMS+Nelumbo nucifera leaves extract(200mg/kg). All mice except the normal group exposed an unpredicted sequence of chronic mild stressors for 5 weeks. The behavior of mice were detected by sucrose preference test, forced swim test and tail suspension test. Then concentration of corticosterone in serum was detected by enzyme immunoassay. Results : Nelumbo nucifera leaves extract administration by daily gavage from the 3rd week exhibited an antidepressant-like effect on CMS-induced depression in mice. Nelumbo nucifera leaves extract administration at dose of 200 mg/kg significantly increased the sucrose consumption, and decreased the immobility durations in forced swim test and tail suspension test. Furthermore the corticosterone level decreased than control group. Conclusions : Chronic mild stress can affect mouse behavior and corticosterone level and cause depression. The present experiments not only further confirm the antidepressant-like effects of Nelumbo nucifera leaves extract in the sucrose preference test, forced swimming test and tail suspension test, but also the improving effects of Nelumbo nucifera leaves extract on the depression-like symptoms in the CMS model. Nelumbo nucifera leaves extract has the antagonism on CMS and produce antidepressive effects.