The North Natuna Sea is an area of strategic importance to Indonesia, both in terms of national security and economy. Legally, this area is part of Indonesia’s Exclusive Zone (EEZ), but China’s unilateral claim to most of this area through the nine-dash line has created tension in the region. Indonesia faces a major challenge to safeguard the sovereignity of this region by using various strategies, one of which is defense diplomacy. This article aims to explore how Indonesia utilizes defense diplomacy in maintaining stability in the Natuna Sea, as well as to analyze the challenges faced and the effectiveness of this approach. The results show that Indonesia’s defense diplomacy can maintain stability, but is still plagued by a number of challenges, including limited resources and the influence of major powers such as China.

This article investigates the relationship between sleep quality and the management of chronic illnesses such as diabetes and hypertension. By analyzing data from patient surveys and health records, the study finds that poor sleep quality is associated with worsened disease management and higher healthcare utilization. The findings suggest that improving sleep quality should be an integral part of chronic illness management strategies to enhance patient outcomes.

The purpose of this research is to determine: (1) The partial influence of leadership style and work environment on employee performance at PT. Color Warni Investama with an Fcount value of 57.061 in Sig. (P) = 0.000.  or Fcount > Ftable (57.061 > 3.14); (2) To determine the influence of leadership style and work environment simultaneously on employee performance at PT. Colorful Investama; (3) The leadership style variable is the dominant variable that influences employee performance. The sample used in this research was 65 people. In this research, data analysis uses multiple linear regression statistics with the help of the SPSS program. The results of the research show that: (1) leadership style and work environment variables simultaneously have a significant effect on employee performance, (2) leadership style and work environment variables partially have a significant effect on employee performance, (2) leadership style variables have a significant effect on employee performance with a tcount value of 6.346 in Sig. (P) = 0.001 or tcount > ttable (6.3469>1.998); (3) that work environment variables have a significant effect on employee performance; (4) The leadership style variable is the dominant variable that influences employee performance. This can be seen from the standard leadership style beta coefficient of 0.551 > the work environment beta coefficient of 0.374.

This research aims to examine what factors influence the level of customer loyalty of GeraiHALO Telkomsel Wonosobo, Central Java. The population in this study are customers who have subscribed or are currently subscribing to Telkomsel Kartu HALO, simPATI and AS product services, having subscribed for at least six months. Determining the sample in this research used the probability sampling method. This analysis uses the Importance Performance Analysis (IPA) method which is used to determine the level of importance and perception (expectations) of the Marketing Mix towards customer satisfaction implemented by the company. The results of the IPA analysis show that the dominant factors influencing customer loyalty are product quality, price, distribution variables. and promotion variables in this research are quite good in explaining customer perceptions. The author's advice to companies is that companies create products that are superior in quality, and always maintain product quality, namely by always innovating products that are tailored to customer desires for the product. Apart from that, companies must always pay attention to customer complaints by minimizing customer complaints.

This research aims to: (1) determine and analyze the simultaneous influence of competency and career development on employee performance at PT. , (3) To find out and analyze which variables have a dominant influence on employee performance at PT. In this research, the type of research uses a quantitative approach, the sample is 31 people, data collection uses questionnaires and data documentation. Meanwhile, the analysis uses descriptive analysis and inferential analysis. Descriptive analysis to determine the high or low levels of the observed variables with the help of data processing using the SPSS program and inferential analysis using multiple linearity regression statistics. The research results show that: (1) Competency and career development variables simultaneously influence employee performance, because the Fcount = 24.089 > Ftable = 3.34; (2) Competency variable value tcount= 2.683 > ttable = 2.048 in sig. =0.12. there is a significant influence between competency on employee performance, (3) Career development variable value t = 2.578 > ttable = 2.048 on sig. = 0.15, there is a significant influence between career development on employee performance, (4) the competency variable has a dominant influence on employee performance, because the standard value of the competency beta coefficient = 0.440 > the standard beta coefficient of career development = 0.422.