http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
모바일 기반 언어 학습 도구로서의 인스타그램을 활용한 한국어 교육 방안 연구 -미국 대학 초급 한국어 수업 사례 및 학습자 인식 조사를 중심으로-
최수정 ( Choi¸ Sujeong ) 한국언어문화교육학회 2021 언어와 문화 Vol.17 No.3
This study designed and presented Korean language education activities using Instagram as a Mobile-Assisted Language Learning tool to supplement the limitations of the learning environment of learners at American colleges with limited opportunities to use Korean outside of the classroom. In addition, by examining the contents and results of the awareness survey conducted on learners, the effects and limitations of Korean language education activities using Instagram were reviewed. As a result of conducting Korean language education activities using Instagram during the semester, learners were all positively aware of the areas of interest, interaction, topic, practice, memory, and engagement regarding the Instagram activities. This study also suggested a way of improving the interaction not only among Korean language learners, but also that between Korean language learners and Korean native speakers using Instagram activities. (Yonsei University)
Choi, Sujeong,Ryu, Il The Korea Society of Management Information System 2015 Asia Pacific Journal of Information Systems Vol.25 No.3
Customers are now demanding ever better service from customer service representatives (CSRs) to create superior customer service. Accordingly, CSRs are required to have more specialized knowledge and abilities of customer service. This study examines the roles of accumulated customer knowledge in electronic knowledge repositories (EKRs), which a firm has developed for customer service over time to enhance CSRs' work capabilities and work performance, in the context of call centers. To test the proposed research model and hypotheses, we conducted LISREL analysis using 261 responses collected on CSRs working for inbound call centers. The key results are as follows. First, accumulated customer knowledge in EKRs enhances CSRs' knowledge utilization and service expertise during the customer contact. Second, CSRs' knowledge utilization reinforces service expertise. Finally, service quality depends on CSRs' knowledge utilization and service expertise, but it is not directly related to accumulated customer knowledge. Overall, the findings suggest that accumulated customer knowledge in EKRs enhances CSRs' knowledge utilization and service expertise, and thereby leading to superior service quality.
Sujeong Min,Si Woo Lee,Byeong-Ryeol Choi,Chang Gyu Park,Si Hyeock Lee,Deok Ho Kwon 한국응용곤충학회 2014 한국응용곤충학회 학술대회논문집 Vol.2014 No.10
Nilaparvata lugens Stål is one of the important migratory pests of rice paddy fields in Korea. Resistance levels to nine insecticides were monitored in 12 local strains and correlation analysis was conducted to determine cross-resistance relationships among the tested insecticides. The local strains revealed 1.3- to 28.0-, 1.6- to 6.0-, 2.8- to 237.0-, 0.6- to 0.9-, and 0.7- to 1.3-fold resistance to carbamates, organophosphates, neonicotinoids, fipronil and etofenprox, respectively. Organophosphates revealed moderate correlations with benzofuranyl methylcarbamate (r = 0.566 - 0.614, p > 0.01). Three neonicotinoids were not correlated each other, but imidacloprid and clothianidin were moderately correlated with several benzofuranyl methylcarbamate and organophosphate insecticides (r = 0.590 - 0.705, p > 0.05), indicating that unknown common factors (such as detoxification enzymes) might contribute to resistance to both insecticides. Fipronil and etofenprox exhibited low levels of resistance and cross-resistance with other insecticides, suggesting their potential as an effective insecticide for field application. Resistance level monitoring and correlation analysis would be valuable for the selection of appropriate insecticides to control insecticide-resistant N. lugenes, a typical migratory pest in Korea.
Nafamostat mesilate promotes endothelium-dependent vasorelaxation via the Akt-eNOS dependent pathway
Choi, Sujeong,Kwon, Hyon-Jo,Song, Hee-Jung,Choi, Si Wan,Nagar, Harsha,Piao, Shuyu,Jung, Saet-byel,Jeon, Byeong Hwa,Kim, Dong Woon,Kim, Cuk-Seong The Korean Society of Pharmacology 2016 The Korean Journal of Physiology & Pharmacology Vol.20 No.5
Nafamostat mesilate (NM), a synthetic serine protease inhibitor, has anticoagulant and anti-inflammatory properties. The intracellular mediator and external anti-inflammatory external signal in the vascular wall have been reported to protect endothelial cells, in part due to nitric oxide (NO) production. This study was designed to examine whether NM exhibit endothelium dependent vascular relaxation through Akt/endothelial nitric oxide synthase (eNOS) activation and generation of NO. NM enhanced Akt/eNOS phosphorylation and NO production in a dose- and time-dependent manner in human umbilical vein endothelial cells (HUVECs) and aorta tissues obtained from rats treated with various concentrations of NM. NM concomitantly decreased arginase activity, which could increase the available arginine substrate for NO production. Moreover, we investigated whether NM increased NO bioavailability and decreased aortic relaxation response to an eNOS inhibitor in the aorta. These results suggest that NM increases NO generation via the Akt/eNOS signaling pathway, leading to endothelium-dependent vascular relaxation. Therefore, the vasorelaxing action of NM may contribute to the regulation of cardiovascular function.
Streaming video packet scheduling by Geo<sup>Y</sup>/G/∞ input process modeling
Choi, Sujeong,Kang, S.H.,Kim, Bara IEEE 2005 IEEE communications letters Vol.9 No.5
We introduce Geo<SUP>Y</SUP>/G/∞ input process with beta-distributed batch size and Weibull-like autocorrelation function in order to model video traffic. Investigating the overflow probability of queueing system by large deviation theory, we develop a streaming scheduling algorithm by applying the overflow analysis result to estimating the packet deadline-missing probability. Through experiments with 30-second long movie traces, we show that our proposed scheduling scheme outperforms existing schemes based on fractional Brownian motion and Markovian models.
강화 학습을 이용한 출퇴근 시간대 열차 정차 시간 최적화
최수정 ( Sujeong Choi ),임유진 ( Yujin Lim ) 한국정보처리학회 2023 한국정보처리학회 학술대회논문집 Vol.30 No.2
대중교통은 현대 사회에서 필수적인 요소이며 특히 출퇴근 시간대에는 도로 교통 상황에 영향을 덜 받는 지하철의 수요가 높은 편이다. 그러나 제한된 물리적 자원으로 인해 열차 내 혼잡도 증가와 열차 운행 지연은 불가피한 상황이다. 본 논문에서는 이를 해결하기 위한 한 가지 방법으로 강화학습 기반 DQN 알고리즘을 이용한 열차 정차 시간 최적화 기법을 제안했다. 열차 정차 시간과 승차 인원 모두 고려하면서 최적화를 진행했을 때와 그렇지 않았을 때를 비교하면서 실험을 진행하여 성능을 분석했다.
기업간 거래에서 정보기술을 활용한 전자적 협력의 범위와 선행요인에 관한 연구
최수정(SuJeong Choi) 한국데이타베이스학회 2008 Journal of information technology applications & m Vol.15 No.4
This study suggests strategies which can enable to creation of new opportunities of competitive advantages while operating a long lasting and consistent business with major trading partners, based on interorganizational information systems (IOISs) specially established and installed for interorganizational transactions. Nowadays, IOISs based mechanism having been widely expanded as a conventional business infrastructure for the interorganizational transactions and/or exchanges, it is customary difficult to obtain any strongly sound advantage over the competitors who have adopted even the simplest deployment of the IOIS mechanisms. In this connection, this study intends to investigate the interorganizational collaborative activities conducted by under the auspicious of IOISs, focused on the prospect of the exploitation of IOISs rather than the implementation of the IOISs. In this study, we, firstly, suggest the concept of Electronic Collaboration which can be defined by the collaborative activities conducted by IOISs, compared to the ones conducted on off-line. In addition, we suggest the Electronic Collaboration as a multi-dimensional concept, constituted by three sub-constructs, the Electronic Information Sharing (EIS), the Electronic Joint Activity (EJA), and the construction of the Electronic Relational Knowledge Store (ERKS). Secondly, we empirically verify the effects of relational and environmental determinants on the Electronic Collaboration. In this study, the relational determinants relate to the variables created in interorganizational relationship like Trust, Influence, Relational Specific Asset asset invested for the transaction-, and Continuity of the relationship. On the other hand, the environmental determinants relate to the variables surrounding the relationship which are difficult to control. We consider Product Complexity, Technological Uncertainty, and Market Variability as the domain of the environmental determinants. To test our hypotheses, we conducted both paper-based survey and online-based survey. After refining the data with missing responses, a total of 150 data was used for analysis. The results were as follows: Firstly, it is statistically significant that the Electronic Collaboration is composed of EIS, EJA, and ERKS. In particular, the results imply that the firms are able to accumulate relational knowledge base as well as to exchange information or knowledge, and to conduct joint activities through effort to further expand the Electronic Collaboration. Secondly, we have verified the individual effects of the relational and the environmental determinants on the Electronic Collaboration. Product Complexity has been revealed as the most influential variable affecting the Electronic Collaboration. Next, Interorganizational Trust and Technological Uncertainty, in that order, have been seen to have significant effects on the Electronic Collaboration. In other words, when products or services seem to be difficult to standardize, and the core technologies seem to rapidly change, the need for the Electronic Collaboration increase. In addition, the observation dictates that the interorganizational trust turns out to be a critical variable in building a relationship and in seeking further collaboration. The results, further, illustrate that the environmental determinants are relatively more effective than the relational determinants, which is not consistent with a few prior researches relational determinants emphasized. It is because this study doesn’t consider the size of the firm. A few researchers have given an emphasis on the relational determinants like trust and influence, especially from the perspective of small firms in interorganizational relationship. However, in our study, where all the sizes of the firms are contained, electronic collaboration is considerably affected by the environmental determinants.