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Author(s): Jiho Choi [1, 2, 3, 4]; Aaron J. Huebner [1, 2, 3, 4]; Kendell Clement [3, 4, 5]; Ryan M. Walsh [1, 2, 3, 4]; Andrej Savol [1]; Kaixuan [...]

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.chb.2004.03.039 Byline: Inwon Kang (a), Kun Chang Lee (b), Sangjae Lee (c), Jiho Choi (d) Keywords: Cognitive map; Factors affecting online community behavior; Community commitment; Loyalty; Social participation; SEM Abstract: It is difficult even for experts in organizational behavior to cognitively predict the causal effect of one factor on the others. A cognitive map is used to describe the inference process for the investigation of online community voluntary behavior. The investigation of online community voluntary behavior demands consideration of the complex causal effect from support for member communication, perceived community value, recognition for contribution, freedom of expression, and interactive communication, to community commitment, loyalty, and social participation. A standardized causal coefficient estimated in structural equation models (SEMs) is used to create a cognitive map illustrating the effect of the status of one component on the status of another component. The cognitive map provides preliminary insights into the direction of online community voluntary behavior toward maximizing community commitment, loyalty, and social participation. Author Affiliation: (a) School of Economics & International Trade, Kyunghee University, Seoul 130-701, Republic of Korea (b) School of Business Administration Sungkyunkwan University, Seoul 110-745, Republic of Korea (c) School of Business Administration Sejong University, Seoul 143-747, Republic of Korea (d) College of Business Administration, Chonnam National University, Qwangju 500-757, Republic of Korea

Even though plastic improved the human standard of living, handling the plastic waste represents an enormous challenge. It takes more than 100 years to decompose discarded or buried waste plastics. Microplastics are one of the causes of significantly pervasive environmental pollutants. The incineration of plastic waste generates toxic gases, underscoring the need for new approaches, in contrast to conventional strategies that are required for recycling plastic waste. Therefore, several studies have attempted to upcycle plastic waste into high value‐added products. Converting plastic waste into carbonaceous materials is an excellent upcycling technique due to their diverse practical applications. This review summarizes various studies dealing with the upcycling of plastic waste into carbonaceous products. Further, this review discusses the applications of carbonaceous products synthesized from plastic waste including carbon fibers, absorbents for water purification, and electrodes for energy storage. Based on the findings, future directions for effective upcycling of plastic waste into carbonaceous materials are suggested. [ABSTRACT FROM AUTHOR]

Byline: Jae Wook Kim, Jiho Choi, Kyesook Han While many practitioners and researchers have recognised the importance of the online community, there has been little empirical research that investigates how online communities effectively sustain their existence and maintain value for their members. The purpose of this study is to suggest online community voluntary behaviour (OCVB) as a critical behavioural outcome that an online community has to pursue from its members to ensure successful growth and existence, and to empirically examine the relationships among relationship building efforts, community commitment, and OCVB. We have tested a model using data collected from a total of 1514 members of an online community and confirmed that online community commitment is a key mediator between OCVB and relationship support activities. The results suggest that an online community's activities to support its members enhance members' commitment to the community and that the community commitment has an important influence on members' voluntary behaviour.

Oscillatory shearing is a popular method to understand transient nonlinear rheology. Various viscoelastic metrics have been used to analyze oscillatory rheology with different perspectives. We present a translation between various viscoelastic metrics for oscillatory rheology, using the framework of sequence of physical processes (SPPs) as a basis. The relation between the SPP metrics and Fourier-based metrics, such as Fourier sine and cosine coefficients, and large and minimum strain and rate metrics is provided. The meaning of the curvature in elastic and viscous Lissajous figures is explained with the sign of the SPP viscoelastic metrics. A low dimensional interpretation of the SPP framework is presented, featuring the center, size, and orientation of a deltoid in a transient Cole-Cole plot. Finally, we show how statistical information regarding the amount of change exhibited by the SPP metrics over a period of oscillation can be used to enhance the presentation and understanding of traditionally performed amplitude sweep experiments. [ABSTRACT FROM AUTHOR]