Yongsuk Kim

Sharing members with other online communities can be problematic for community responsiveness, as less member time and attention become available for the focal community. However, member time and attention spent externally have the potential to generate knowledge that bolsters the focal community’s responsiveness. Little is known about when member time and attention spent externally become such generative resources. Building on and extending the knowledge collaboration theory of online communiti

The paper expands theoretical and empirical understanding of the interaction between formal boundary spanning mechanism (i.e. individuals formally nominated to span boundaries for knowledge sharing) and informal boundary spanning mechanism (i.e., informal seeking of information via social ties crossing boundaries) in a far-flung operation of a global company. Through a case study of engineering groups at a U.S. based manufacturing plant, we found that both formal and informal boundary spanning m

본 연구는 한국교육종단연구2013의 초등학교 6학년부터 중학교 3학년까지의 학생 데이터들을 활용하여 수학 학업성취도의 종단적인 변화양상에따른 학업적 자아개념 및 교사와 부모의 학업적 지원이 수학 학업성취도에 미치는 직·간접적인 영향력을 종단적으로 살펴보았다. 분석결과, 그룹별학업적 자아개념은 수학 학업성취도에 긍정적인 영향력을 미치는 것으로 나타났으며, 교사와 부모의 학업적 지원은 학업적 자아개념을 매개로 하여수학 학업성취도에 긍정적인 영향력을 미치는 것으로 나타났다. 또한, 학업적 자아개념과 수학 수직척도점수에 미치는 직·간접적인 영향력은 부모의학업적 지원 보다 교사의 학업적 지원이 더 많은 영향력을 미치는 것으로 나타났다. 이러한 점에 따른 교육적인 함의점을 논의하였다.

Railway contact wires supplying electricity to trains are exposed to repeated mechanical strain and stress caused by their own weightand discontinuous contact with a pantograph during train operation. Since the speed of railway transportation has increased continuously,railway industries have recently reported a number of contact wire failures caused by mechanical fatigue fractures instead of normal wear,which has been a more common failure mechanism. To secure the safety and durability of conta

We study the antecedents to tie formation on an (Facebook-like) enterprise social media platform implemented to support cross-boundary connections. Research has produced mixed findings regarding the role of social media in cultivating bridging vs. closed networks. We examine the tie formation patterns of 1,386 enterprise social media users over a two-year period. Specifically, we observe who became (or chose not s become) “friends” with whom at the dyadic level and relate the decisions to variou

Contact wire is one of the most important components supplying electricity to railroad cars. At the beginning of the research on contact wire, wear problem caused by friction between contact wire and pantograph was considered even more important issue for the failure of contact wire. However, since several fatigue fractures were reported from Shinkansen in Japan, fatigue fracture has become another important issue for the failure of contact wire. Despite of its importance, standard of the fatigu

We study the antecedents to tie formation on an enterprise social media platform implemented to support cross-boundary connections. Research has produced mixed findings regarding the role of social media in cultivating bridging vs. Closed networks. We examine the tie formation patterns of 1,386 enterprise social media users over a two-year period. We first find that users tend to form ties via reciprocity and transitivity (with friends of friends). As for whom they initiate ties with in the firs

An electrochemical microchip sensor was fabricated through the photolithographic process. The metal paste used in the micro-pattern of the sensor chip contained dendritic and spherical Ag-coated Cu powders, which decreased the electrical resistance of the pattern down to 25.69·cm by forming a network for electron transfer between particles. The electrode materials were dendritic palladium oxide-nickel oxide powders that showed dramatically high surface area. Also, a synergetic effect on the sen

Thermal barrier coatings (TBC) protect the components of gas turbines from severe environments by reducing the surface temperatureof the substrate. Therefore, an accurate prediction of the temperature gradient (temperature drop) in TBC is an important issue whenestimating the exact life of the components. Material properties of bulk ceramic are often used for the analysis. However, Bulkmaterials do not have the same material properties as thin ceramic layers due to differences in processing and

As crowdfunding platforms are increasingly linked to third-party social media platforms, questions arise as to whether project initiators can leverage their online friendships as sources of funding for their crowdfunding campaigns and, if so, how and through what mechanisms online friendships affect individual funding decisions. Taking a relational view, we examine the effects of tie strength and embeddedness on funding decisions. Our analysis of social media-mediated ties and crowdfunding campa

Purpose – This study presents strategies to overcome the COVID-19-induced crisis in Korea’s meetings, incentives, conferences, and exhibitions (MICE) industry. It aims to quantitatively identify the environmental factors affecting the industry and their degree of influence, and derive optimal countermeasures. Design/methodology – The study applied the SWOT-AHP-TOWS framework. An AHP analysis was first performed within the SWOT frame, and then a TOWS analysis was conducted using the r

Many organizations facilitate a host of online knowledge sharing communities to assist internal knowledge sharing and operation. The permeable boundaries and voluntary structures of online communities allow individuals to span community boundaries and affect member resources and structures. Although much research has been done on members’ knowledge contribution in online communities, relatively little is known about how a member’s contribution to a community is shaped by the cross-level interact