This study aims to examine the potential and challenges of utilizing Solar Power Plants (PLTS) in Medan City, which is geographically located near the equator and receives high exposure to sunlight throughout the year. The method used is a literature review with a narrative review approach that analyzes secondary data from various journals and relevant scientific articles. The results of the study show that Medan City has an average annual horizontal global solar radiation intensity of 463.61 W/m², with the potential for electrical power that can be generated from rooftop solar panels reaching 748.57 MW (monocrystalline), 598.85 MW (polycrystalline), and 299.43 MW (thin film). This potential is comparable to the capacity of large-scale power plants. The use of PLTS contributes to reducing carbon emissions, increasing energy security, creating jobs, and developing the local economy. However, challenges such as high installation costs, limited suitability of roof structures, and low public awareness are still major obstacles in the implementation of this technology. Therefore, synergy is needed between government policies, public education, and technological innovation to optimize the use of solar energy in urban areas such as Medan.

This study aims to compare two main theories in modern cosmology, namely the Big Bang Theory and the Steady State Theory, using a descriptive cosmographic approach. This study is motivated by the lack of deep understanding as well as the limited Indonesian literature discussing the fundamental differences between the two theories. By employing a qualitative method through literature review, this research examines the characteristics, advantages, and limitations of each theory based on the latest scientific evidence and cosmographic perspectives. The analysis results show that the Big Bang Theory has strong support from observational evidence, such as cosmic microwave background radiation (CMB), galaxy redshift, and the distribution of light elements, which reinforces the narrative of the expansion and evolution of the universe. In contrast, the Steady State Theory is considered less relevant due to the absence of observational evidence for the creation of new matter and its inability to explain structure and the dynamics of the universe that are currently observed.

This research examines the development of sustainable coastal ecotourism at Sri Mersing Beach, Kuala Lama Village, Serdang Bedagai Regency. This area has tourism potential in the form of a 2-kilometer stretch of white sand beach, a gentle beach gradient, and a row of pine trees that provide a distinctive shade. The research was conducted in March-April 2025 using a descriptive qualitative approach with a case study method. Data collection was carried out through direct observation, in-depth interviews with key informants selected through purposive sampling, and literature study. The research results indicate that the development of ecotourism in this area faces several major challenges, such as limited infrastructure, suboptimal waste management, low capacity of local human resources, and weak institutional coordination. Nevertheless, the preserved natural potential and local uniqueness provide significant opportunities for the development of sustainable ecotourism. This research recommends an integrated approach that involves all stakeholders in formulating eco-tourism development strategies that consider economic, social, and environmental aspects.

This journal discusses the efficiency impact of the renovation of Merdeka Field on the development of local MSMEs. The aim is to understand and analyse the multifaceted impacts that the renovation of Merdeka Square has had on the development of local MSMEs, as well as to identify and assess the various challenges faced by local MSMEs following its revitalization, including issues relating to accessibility and the potential commercialization of public spaces. The methodology used in this study involved direct observation of MSME activities both before and after the renovation. In addition to comprehensive interviews with MSMEs and relevant stakeholders, in addition to documentation related to the revitalization process of Merdeka Square and its impact on MSMEs. With well-defined regulations and an enhanced suite of facilities, MSMEs near Merdeka Square are poised to achieve superior development and maintain competitiveness amidst the evolving urban landscape.
 

Since the time of the archipelago, Acehnese culture has maintained a rich and intricate cultural legacy. Due to its advantageous position and status as a commerce route, Acehnese culture was influenced by the cultures of many of the traders that passed through. The purpose of this study is to learn about Acehnese culture from a social and physical standpoint. The information gained from this study's findings will undergo qualitative analysis. With the help of interview rules, this data collecting method is conducted by asking informants questions directly and verbally (face-to-face). In order to generate qualitative data, researchers perform qualitative analysis by giving a detailed and understandable explanation of the problem information. Based on the outcomes of interviews conducted by researchers, the Acehnese tribal community has similarities between physical and social behavior that are still applied in everyday life which are usually presented at traditional events, religious celebrations and cultural celebrations and the Acehnese tribal community is also famous for its traditional traditions and strong religion and highly upheld norms that are still applied in everyday life. These norms include Islamic religious norms, legal norms originating from the Islamic Religion and the 1945 Constitution, politeness norms in dressing in accordance with Islamic teachings, moral norms that closely related to Islamic teachings, and social norms such as courtesy, mutual respect, mutual cooperation and mutual assistance. In this research, it can be concluded that the Acehnese people who live around Medan Tembung sub-district, Medan city, actually still adhere to several norms which are an integral part of their identity and daily life. And also has customs. Social practices and traditions that have been maintained for generations by the Acehnese people reflect the richness of their culture and spirituality. And the Acehnese language not only functions as a means of communication, but also as a symbol of regional identity and pride for the Acehnese people