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With the development and proliferation of online games, understanding how to seize these players has become an essential issue for academic scholars and practitioners. Based on virtual experience in online gaming communities and consumer engagement perspectives, this research developed and verified a multi-dimensional framework for assessing how to retain and encourage players continuous dedication and engagement behaviors. The proposed framework illustrates the interrelationships among six constructs in online gaming communities: social presence, telepresence, cognitive social identity, affective social identity, psychological engagement, and behavioral engagement. Data collected from 338 players who have experience in engagement behaviors in online gaming communities. The collected data were examined against the research framework using structural equation modeling (SEM). The research findings offer sufficient evidence that behavioral engagement is influenced by psychological engagement, which consecutively, are determined by cognitive social identity, affective social identity, social presence, and telepresence. More importantly, the mediating analysis indicated that psychological engagement is a crucial mediator, meaning that consumer engagement is a sequential process, and behavioral engagement cannot independently exist without psychological engagement. Taken together, the research results of this study have several critical theoretical and practical implications for future academic researchers and practitioners to have better understanding of consumer engagement. By doing so, the game companies can have sustainable competitive advantage and support sustainable development.

The permutation flow shop scheduling problem (PFSP) is a renowned problem in the scheduling research community. It is an NP-hard combinatorial optimization problem that has useful real-world applications. In this problem, finding a useful algorithm to handle the massive amounts of jobs required to retrieve an actionable permutation order in a reasonable amount of time is important. The recently developed crow search algorithm (CSA) is a novel swarm-based metaheuristic algorithm originally proposed to solve mathematical optimization problems. In this paper, a hybrid CSA (HCSA) is proposed to minimize the makespans of PFSPs. First, to make the CSA suitable for solving the PFSP, the smallest position value rule is applied to convert continuous numbers into job sequences. Then, the HCSA uses a Nawaz–Enscore–Ham (NEH) technique to create a population with the required levels of quality and diversity. We apply a local search to enhance the quality of the solutions and avoid premature convergence; simulated annealing enhances the local search of a method based on a variable neighborhood search. Computational tests are used to evaluate the algorithm using PFSP benchmarks with job sizes between 20 and 500. The tests indicate that the performance of the proposed HCSA is significantly superior to that of other algorithms.

We report a new set of reactions based on the unlocking of amides through simple treatment with allyl bromide, creating a common platform for accessing a diverse range of nitrogen-containing functional groups such as primary amides, sulfonamides, primary amines, N-acyl compounds (esters, thioesters, amides), and Nsulfonyl esters. The method has potential industrial applicability, as demonstrated through gram-scale syntheses in batch and in a continuous flow system.

Abstract-Online games have been prevailing over the last decade and becoming a most popular leisure activity. Specifically, one of the recent and favorite types of online games is massively multiplayer online role-playing games (MMORPGs). MMORPGs are very prevalent in the adolescent, resulted from their characteristics, such as network connected, interactive, team-based type, and virtual challenge tasks. Antecedent studies have never thought of uses and gratification approach and the sense of virtual community at the same time when investigating the knowledge sharing in MMORPGs communities; however, the factors of uses and gratification theory will affect knowledge sharing through the sense of virtual community practically. This study is catering to this trend and attempts to build a comprehensive model for capturing the dynamic of knowledge sharing behaviors in MMORPGs communities.