This study discusses the concept and online buying and selling transactions that comply with sharia principles. This study aims to analyze the validity of online buying and selling transactions based on the perspective of fiqh muamalah. This study uses qualitative descriptive and literature research methods by examining materials related to the Analysis of Online Shopping Transactions in the Perspective of Fiqh Muamalah and Sharia compliance. The results of the study indicate that online shopping transactions can be considered valid according to sharia if they meet four main requirements, namely the existence of the transacting parties, the existence of ijab and qabul, clarity of the object of the transaction, and a halal purpose. In addition, the principles of transparency, honesty, and freedom from usury and gharar are important requirements in maintaining the justice and validity of online buying and selling according to Islamic law.Keywords : Online buying and selling, Islamic jurisprudence, Sharia compliance, Transaction validity, Offer and acceptance

Students in the Information Systems Program at UIN Sumatera Utara tend to have irregular eating patterns with high consumption of fast food. This habit contributes to various health problems such as digestive disorders and decreased concentration. This study was conducted to investigate the eating patterns of students in the Information Systems Program at UIN Sumatera Utara and their relationship with their health conditions. Through a quantitative survey of 50 respondents, the results showed that most students eat less than three times a day, with the highest frequency being twice a day (48%). Additionally, the majority of students consume fast food 1–2 times a week (60%). Analysis using the Chi-Square test revealed a significant association between the frequency of fast food consumption and students' health conditions (p < 0.05). Many students experienced health issues such as stomach problems and fatigue related to their unhealthy eating patterns. These findings emphasize the need for nutrition education and the implementation of practical healthy eating patterns to support students' health and academic performance.

The implementation of coal mining activities with an open pit system at the end of its activities will leave behind the remains of former mining holes. Control of acid mine water is something that needs to be done during mining activities until the end of the mining process because acid mine water can cause a decrease in the quality of surface water and groundwater and have an impact on the survival of humans and biota that live on land and water. The initial characteristics of water using the floating treatment method of wetland, the pH, TSS, Fe, and Mn values ??of ex-mining lake water do not meet the quality standards of the Government Regulation of the Republic of Indonesia Number 22 of 2021. The ability of water hyacinth plants to increase pH for 25 days is quite good with an initial pH value of 4.13 to 7.34. For 25 days, the TSS parameter of water hyacinth plants is also good at reducing TSS levels with an initial value of 6 mg/L to 3 mg/L, the Fe parameter of water hyacinth plants is also good at reducing iron levels with an initial value of 1.06 mg/L to 0.34 mg/L, while the Mn parameter of water hyacinth plants is quite good at reducing manganese levels with an initial value of 1.13 mg/L to 0.32 mg/L.

This study aims to investigate the role of SWOT analysis in the strategic decision-making process at Warcaf, Warcaf is a business operating in the culinary sector. In the context of increasingly tight business competition today, it is very important for a company to have a good strategy in order to remain competitive in the market. SWOT analysis, including the recognition of strengths, weaknesses, opportunities, and threats, serves as a fairly efficient instrument in designing strategies that are in accordance with the company's internal and external situations. The method applied in this study is a qualitative approach, where information is obtained through in-depth interviews with Warcaf management. This study shows that SWOT analysis not only plays a role in the strategic decision-making process, but also as a basis for long-term planning. It is expected that this study can provide contributions such as information and strategies in the culinary industry.

This study aims to examine the impact of systematic risk and interest rates on the stock returns of state-owned banks (Bank BUMN) listed on the Indonesia Stock Exchange during the period 2021–2023. Using a multiple linear regression approach, the study finds that neither systematic risk nor interest rates have a significant partial or joint effect on the stock returns of Bank BUMN. These findings indicate that in the context of the Indonesian stock market—particularly the state-owned banking sector—these factors may not necessarily be the primary determinants in shaping stock returns. The implication of these results is the importance of considering other variables that may play a greater role in explaining stock return movements, such as firm-specific microeconomic factors and investor expectations regarding the banks’ fundamental performance.

The This study uses a descriptive statistical approach to analyze the level of student satisfaction with campus facilities at the State Islamic University of North Sumatra. Data were obtained through an online questionnaire using a simple random sampling method with 36 respondents. The questionnaire covered four categories of facilities: general, technology and accessibility, academic support, and campus and infrastructure. The analysis involved calculating percentage, probability, mathematical expectation, variance, and standard deviation. The results showed that library comfort had the highest satisfaction score (expected = 4.06), while the Wi-Fi connection had the lowest score (expected = 3.06, deviation = 1.39), indicating dissatisfaction and an uneven perception. Other aspects, such as academic guidance by lecturers (expectation = 3.86), toilet facilities (expectation = 3.83), and laboratories (expectation = 3.72), showed good satisfaction levels. These findings provide a strong basis for the campus to improve low-scoring areas and maintain areas that meet student expectations.

This study aims to determine the influence of Ownership Structure, Capital Structure,   Good   Corporate   Governance   and   Company   Size   on   Company Financial Performance in Energy Sector companies listed on the Indonesia stock exchange for the period 2019-2023. The variables used in this study, the independent variable (X) consists of Ownership Structure proxied by Institutional Ownership (KI), Capital Structure proxied by Debt to Equity Ratio (DER), Good Corporate Governance proxied by Independent Board of Commisioners (DKI) and Company Size by Ln (TA) and the dependent variable (Y) is Financial Permormance proxied by Return on Assets (ROA). The sample in this study was obtained using the purposive side method.Based on the criteria and data processing process that  were set, 25 companies  were determined as research samples. The data analysis technique used was multiple linear regression. The results of this study state that the influence between ownership structuree, capital structutre, good corporate governance, and company size has a  simultaneous effect on the financial performance of the Energy sector listed on the Indonesia Stock Exchange (IDX).

This study aims to analyze students' difficulties in understanding algebraic concepts in the implementation of the Merdeka Curriculum. This type of research uses a descriptive research method with a qualitative approach. Data collection techniques include interviews, questionnaires, and three written tests. Based on the results of interviews and questionnaires conducted by teachers with the school principal and mathematics teachers, the school has implemented the Merdeka Curriculum despite limitations in resources. The Merdeka Curriculum contributes to teachers in terms of teaching modules and freedom in creativity in learning, although training is still needed. The results of the student questionnaire indicate that the majority of students have difficulty understanding algebra, especially in identifying variables, but the majority of students feel that classroom learning is interactive and enjoyable. Most students feel helped by the example questions provided by the teacher. The written test results show that students have difficulty with the use of positive and negative signs, coefficients, constants, algebraic operations, and determining variable values. This indicates that the majority of students have not yet achieved mastery of the algebra material. It can be concluded that the implementation of the independent curriculum at SMP IT Az-Zahira Khatulistiwa supports teachers in the algebra learning process through the use of teaching modules, but students still struggle to understand algebraic concepts due to the limited use of educational media, which is constrained by the school's facilities.

Food hygiene and sanitation are crucial in the culinary industry to prevent contamination and protect consumer health. However, foodborne diseases remain a global issue due to poor food handling practices. Traditional lecture methods are often ineffective in improving students' practical skills related to food safety. This study evaluates the effectiveness of Role-Playing Cards as an interactive learning tool. A quasi-experimental design with a pre-test and post-test was conducted on 70 culinary students enrolled in a food hygiene and sanitation course. Participants were divided into two groups: Cross-Contamination and Foodborne Illness. The findings showed a significant improvement in understanding, with post-test scores increasing from 58.2 to 87.6 (p < 0.001) and from 60.4 to 89.2 (p < 0.001). Additionally, 99% of students found the method relevant, and 97% considered Role-Playing Cards engaging and easy to apply. In conclusion, this method effectively enhances students' understanding, promotes critical thinking, and provides a more interactive learning experience in food safety education.