Chronic Kidney Disease (CKD) is a condition caused by structural or functional abnormalities characterized by a decrease in the glomerular filtration rate (GFR). One of the treatments for CKD patients is hemodialysis (HD). Sleep disorders are among the complications of hemodialysis. Administering lavender aromatherapy is a method to improve the sleep quality of patients. This study uses a literature review method. Articles were searched on ScienceDirect, PubMed, and Google Scholar using advanced search with the keywords "Chronic Kidney Disease, Hemodialysis, Lavender Aromatherapy," resulting in 10 relevant articles to compile this review. The results showed that lavender aromatherapy was effective in addressing complications such as poor sleep quality, fatigue, pain, and anxiety in hemodialysis patients. In conclusion, lavender aromatherapy has been proven effective in improving the sleep quality of HD patients.

This study investigates the effects of social media usage on the mental health of adolescents, focusing on issues such as anxiety, self-esteem, and depression. Using surveys and interviews, the research examines how prolonged exposure to social media content, peer comparison, and cyberbullying contribute to mental health challenges. Findings indicate that while social media fosters connectivity, it can also exacerbate mental health issues, highlighting the need for greater awareness and parental guidance.

This research aims to analyze learning difficulties in the mathematical reasoning subtest for students taking the Computer-Based Writing Examination (UTBK). The mathematical reasoning subtest is an important part of measuring students' abilities in solving high-level mathematical problems. The research method used was quantitative analysis of UTBK results data as well as in-depth interviews with a number of students.The results of the analysis show that the majority of students have difficulty understanding the mathematical concepts underlying the reasoning subtest. Factors such as a lack of understanding of basic concepts, less effective learning methods, and exam anxiety may be the main causes of these difficulties. Apart from that, these findings also indicate that there is a gap in students' preparation for the types of mathematical reasoning questions tested in UTBK. Developing more interactive and in-depth learning strategies, providing intensive academic guidance, and improving metacognitive skills can be a solution to overcome these learning difficulties. In addition, this research suggests that UTBK administrators and educational institutions pay special attention to understanding basic mathematical concepts at the upper secondary education level in order to increase students' readiness for exams. By understanding the difficulty of learning the mathematical reasoning subtest, it is hoped that it can make a positive contribution in formulating more effective educational policies, as well as providing direction for teachers and educational institutions in improving the quality of mathematics learning at the high school level.