Yonsei University

About: Yonsei University is a education organization based out in Seoul, South Korea. It is known for research contribution in the topics: Population & Cancer. The organization has 50162 authors who have published 106172 publications receiving 2279044 citations. The organization is also known as: Yonsei.

Initial trust and the adoption of B2C e-commerce: The case of internet banking

Abstract: A possible reason for the delayed acceptance of the Internet as a retail distribution channel may be the lack of trust consumers have in the electronic channel and in the Web merchants. Few prior studies on the adoption of business-to-consumer e-commerce have considered trust in information technology as an important determinant of adoption behavior. This research explicitly encompasses the electronic channel and the merchant as objects to be trusted in a specific e-commerce application, i.e. Internet banking.Our conceptual model posits that initial trust in the electronic channel as a banking medium and trust in bank are the major determinants of adoption behavior. Based on social network theory and trust theory, determinants of trust in the electronic channel such as propensity-to-trust, word-of-mouth (WOM) referrals, structural assurances, are included in the research model.The analyses of independent variables indicated that propensity-to-trust, structural assurances, and relational content of WOM were significant predictors of initial trust in the electronic channel. Our findings also indicated that a significant relationship exists between initial trust in the electronic channel and the adoption of Internet banking. However, further analysis revealed that trust could be a necessary but not a sufficient condition for the adoption of Internet banking.

Spontaneous self-descriptions and ethnic identities in individualistic and collectivistic cultures.

Abstract: The Twenty Statements Test (TST) was administered in Seoul and New York, to 454 students from 2 cultures that emphasize collectivism and individualism, respectively. Responses, coded into 33 categories, were classified as either abstract or specific and as either autonomous or social. These 2 dichotomies were more independent in Seoul than in New York. The New York sample included Asian American whose spontaneous social identities differed. They either never listed ethnicity-nationality on the TST, or listed it once or twice. Unidentified Asian Americans' self-concepts resembled Euro-Americans' self-concepts, and twice identified Asian Americans' self-concepts resembled Koreans' self-concepts, in both abstractness-specificity and autonomy-sociality. Differential acculturation did not account for these results. Implications for social identity, self-categorization, and acculturation theory are discussed.

Improvement of Gas-Sensing Performance of Large-Area Tungsten Disulfide Nanosheets by Surface Functionalization

Abstract: Semiconducting two-dimensional (2D) transition metal dichalcogenides (TMDCs) are promising gas-sensing materials due to their large surface-to-volume ratio. However, their poor gas-sensing performance resulting from the low response, incomplete recovery, and insufficient selectivity hinders the realization of high-performance 2D TMDC gas sensors. Here, we demonstrate the improvement of gas-sensing performance of large-area tungsten disulfide (WS2) nanosheets through surface functionalization using Ag nanowires (NWs). Large-area WS2 nanosheets were synthesized through atomic layer deposition of WO3 followed by sulfurization. The pristine WS2 gas sensors exhibited a significant response to acetone and NO2 but an incomplete recovery in the case of NO2 sensing. After AgNW functionalization, the WS2 gas sensor showed dramatically improved response (667%) and recovery upon NO2 exposure. Our results establish that the proposed method is a promising strategy to improve 2D TMDC gas sensors.

Direct writing of silver conductive patterns: Improvement of film morphology and conductance by controlling solvent compositions

Abstract: The authors have investigated the influence of conductive ink compositions on the quality of ink-jet printed patterns. Controlling the solvent compositions plays an important role of reducing the so-called coffee ring effect. The use of a higher boiling point solvent with lower surface tension such as ethylene glycol enables the formation of a uniform deposit of silver nanoparticles due to surface tension gradient-induced inward Marangoni flow, which can compensate outward convective flow. It is demonstrated that the ink-jet printed film quality is directly related to the resistance difference in the conductive patterns.