The research objective was to determine the community's knowledge, attitudes, and behavior in preventing the transmission of COVID-19 with a systematic review approach. The research method used the protocol preferred reporting items for systematic review and meta-analysis (PRISMA). The research variables were sociodemographic, knowledge, attitudes, and behaviors to prevent COVID 19. The search process for articles was accessed on three electronic journal databases. The article inclusion criteria are quantitative research, primary data, and year of publication (January-July 2020), in English, open access; have gone through the peer review stage, and full-text articles. A descriptive analysis was carried out on each research variable. The results showed ten articles that fit the inclusion criteria, consisting of 100% sociodemographic variables, 90% knowledge, 90% attitude, and 80% behavior. The number of articles with significant research results on knowledge variables (covering aspects of disease recognition, modes of transmission, general symptoms, and methods of prevention) was 61.11% of articles. The number of significant articles on attitude variables (including self-isolation, use of masks, social distancing, COVID-19, and government) was 35.54%. The number of substantial articles on the variable of preventive behavior (including handwashing, social distancing, hand sanitizers, use of masks, and self-isolation) was 45%.

Community-based waste management is an effort to reduce and manage waste. The community, where the household is a part of it as one of the waste producers can reduce and reuse their waste and even provide an additional income. To make the community plays an active and continuous role in a waste management, an organization with community members is needed to run the management and utilize waste together, which will provide mutual benefits. From the community service activities that have been carried out, the community gives a positive response on managing waste. Institutions are needed to be made to maintain the sustainability of the waste management. Waste management activities are given to the parties who are homeowners, those who have an elementary education and those who are in a productive age (31-40 years).

Tourist loyalty is created through good tourism service quality and the availability of tourism products. This study discussed the various attributes of tourism service quality, namely, tour agents, efficient personnel, accessible transportation, and information service quality. Whereas for tourism product availability attributes were varieties of product availability, wide selection of tour agents and tourist products, and wide variety of amenity services. As a general rule, the minimum is to have at least five times as many observations as the number of variables to be analyzed, and the more acceptable sample size would have a 10:1 ratio. A total of 424 questionnaires were returned, with 35 removed due to errors. Finally, 389 questionnaires respondents were used via accidental sampling method through the distribution of questionnaires to foreign tourists at Soekarno Hatta International Airport. In addition, AMOS 7.0 software is used to test models in confirmatory factor analysis (CFA) as well as hypothetical testing using structural equation modeling (SEM). The results showed that all hypotheses were accepted, except for the effect of tourism service quality on tourist loyalty in Indonesia. This research aims to contribute significantly to the existing knowledge of tourism, specifically from a foreign tourist perspective in Indonesia.

In running the business, efforts to always improve efficiency is a must. For the company efficiency not only on production activities but also on all chain in their supply chain. Collaboration is a must on a supply chain in order to achieve the common goals of companies in the supply chain. On the other hand, industrial symbiosis is an environmental management approach hat also requires collaboration in its implementation. Collaboration and synergy are two important things in the early stages of symbiosis industry formation. Therefore this paper sees the opportunity of application of symbiosis industry in supply chain. As an example, use dare earch about model of collaboration utilization and synergy of supply chain to apply symbiosis industry in component automotive supply chain.

Tanjung Lesung is a possible tourism attraction. This is consistent with the rising amount of investment in Tanjung Lesung's ecotourism sector, but the growth in poverty in Tanjung Lesung is not. The goal of this study is to examine people's perceptions of Tanjung Lesung. The elements that impact people's opinions will be categorized as economic, socio-cultural, and environmental. The survey approach was used to collect data for this study, with a questionnaire serving as the instrument. This study's sample size is 103 respondents chosen at random among Tanjung Lesung visitors. Descriptive and multiple regression analyses were employed in this study. The findings reveal that economic and environmental factors have a substantial effect on people's opinions. The socio-cultural factor, on the other hand, has no substantial impact on people's opinions.