This study aimed to examine the influence of conflict, leadership, organizational culture, and work ethic on employees' work performance in North Sumatra Education Authority, Indonesia. This becomes important because this organization is not a profit-oriented organization, so it needs further understanding about how to foster the work performance. However, most of these research topics still concentrate on the western populations. A quantitative approach was used to conduct this study, where data were collected directly to the office of Education Authority with n = 180. Partial Least Square Structural Equation Modeling (PLS-SEM) is employed for data analysis in this study. The results showed that conflict negatively affects employees' work performance. However, leadership, organizational culture, and work ethic have positive effect on employees' work performance.

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The aim of this research is to take advantage of data mining techniques using the Apriori sales data algorithm for agricultural equipment. This is due to the fact that the high potential agricultural sector in Indonesia has obstacles to the use of technology. Research was conducted in the district of Simalungun in a shop selling agricultural needs. Sales activities in the store continue and generate more and more data. In order to be of use to the resulting data, it is necessary to process these data with a certain algorithm that provides great benefits, in particular by maximizing the sales profits of agricultural products. Apriori Algorithm is one of the methods of data mining, the activities of which include data collection and the use of old data with the aim of finding regularities, patterns or relationships in data collection. The output of the algorithm can help future decision-makers, where one of the advantages is the rearrangement of the product layout, such as the most frequently sold products being assembled so that they are easily visible to consumers and can properly prepare stock items for the store.

This study aims to see how the influence of communication and leadership on conflict resolution. Communication and leadership, which is an integral part of the organization, generally have a strong influence on the organization or even not, depending on how they communicate and use their leadership in managing the organization. The research method used is correlational research which aims to detect the extent to which variations in one factor are related to variations in other factors based on the correlation coefficient. Organizational communication structure is defined as a system of pathways through which messages flow or as a pattern of interaction between the people who make up the organization (Nica in Hener, 2010). Leaders influence others through their ability to motivate, inform, inspire, have technical competence, communicate effectively, and convey a vision (Pierce & Newstrom in Kaimenyi, 2014). Organizational conflict is a disagreement between individuals or groups within the organization, focusing on factors ranging from resource allocation and division of responsibilities to the employee organization as a whole (Hossain, 2017).

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