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This study examines the increasing prevalence of premarital sexual behavior among Indonesian adolescents, including Catholic youths, which poses a significant challenge to the moral formation and faith development promoted by the Catholic Church. Using a qualitative method with a literature study approach, this research analyzes the phenomenon of adolescent free sex from the perspective of Catholic moral theology and family pastoral care. The findings reveal that the rise of free sexual behavior among adolescents is strongly influenced by curiosity, fragmented family structures, weak value-based sexual education, and the unregulated use of digital media. Moral theology views sexuality as a divine gift whose authentic meaning is realized only within the sacramental bond of marriage; therefore, premarital sex is considered a deviation from human dignity and the true nature of love. The study also highlights the essential role of the family as the Domestic Church in shaping conscience, character, and responsible sexual attitudes among youths. Pastoral strategies proposed include integral sexual education, strengthening parent–child communication in the digital age, and contextual pastoral accompaniment rooted in compassion, as emphasized in Amoris Laetitia. This research underscores the need for collaborative efforts between families, the Church, and educational institutions to guide young people toward a holistic understanding of sexuality, authentic love, and their Christian vocation in contemporary society.  

Rock stability and service life in geotechnical and mining engineering are highly dependent on the rock's mechanical and physical parameters, where the variation in sandstone grain size is a crucial intrinsic factor. This study aims to comprehensively analyze the correlation between sandstone grain size with uniaxial compressive strength (UCS) and resistance to weathering (Slake Durability Index) in samples taken from the Balikpapan and Pulau Balang Formations in the Samarinda area, East Kalimantan. The research methodology involved a series of standard laboratory tests, including rock physical properties analysis, grain size distribution analysis, UCS testing, and slake durability testing through three cycles. The test results show a significant correlation: sandstone with finer grain sizes and higher density consistently demonstrates greater UCS values and a higher Durability Index, indicating superior mechanical and physical resistance. Specifically, the Pulau Balang Formation exhibits a more compact structure and finer grain size, resulting in better durability values compared to the Balikpapan Formation. These findings are important as a geomechanical data basis for slope design planning, rock mass stability analysis, and material selection in infrastructure projects or mining operations involving both formations.

Durability is defined as a measure of a rock's resistance to weathering and disintegration when the rock undergoes weathering processes over a short period of time. The susceptibility of rocks to disintegration is related to their low durability. Rock durability is often measured using the slake durability test. The slake durability test is widely used to assess physical changes resulting from wetting-drying processes (Franklin and Chandra, 1972). Therefore, slake durability testing is conducted to understand the weathering of rocks caused by heat and water, particularly clay stones which are one of the constituent rocks on a slope. The sampling location is around Sanga-sanga and Muara Badak. Sampling was conducted with coordinate points and the Balikpapan and Kampungbaru formations. The claystone samples taken were then brought to the Mineral and Coal Technology Laboratory of the Engineering Faculty of Mulawarman University for Slake Durability tests. In this study, the lowest index value obtained was 45.7% and the highest value was 93%, indicating high to very high durability. The difference in the durability index values of claystone at the research locations indicates the presence of variables that can affect the slake durability index values of the claystone in the Balikpapan and Kampungbaru formations, including grain size and mineral content as well as geological conditions at the research site. Based on the results of the claystone durability tests, the durability index value (Id2) was obtained, indicating that the sandstone at the research location falls into the classification of high to low.

Compressive strength is one of the mechanical properties of rock behavior. This study focuses on the Balikpapan and Kampungbaru Formations located in the Kutai Kartanegara area, East Kalimantan. The Schmidt Hammer testing method was applied due to the lack of previous studies utilizing this tool to evaluate rock hardness in correlation with compressive strength. The research site is situated in the Kutai Kartanegara area, specifically in the districts of Muara Badak, Muara Jawa, and Sanga-Sanga. Field observations revealed the presence of claystone slopes at predetermined locations. Based on the test results, the uniaxial compressive strength (UCS) values for the Balikpapan Formation range from 3.453 MPa to 5.454 MPa, while the Kampungbaru Formation ranges from 3.317 MPa to 8.571 MPa. The Schmidt Hammer rebound number (RN) values for the Balikpapan Formation range from 17 to 19.6, and for the Kampungbaru Formation from 15 to 23.7. A negative correlation was found between the rebound number and UCS, where higher RN values tend to correspond with lower UCS values. This is supported by the linear regression analysis showing a negative coefficient (-0.450).  

The phenomenon of online ojek as part of the platform-based economy has grown rapidly, especially in Indonesia. This job is in high demand by youth as an alternative job that offers flexibility. However, behind the benefits offered, this profession also carries economic, social, and political risks. This article aims to examine the identity formation of youth working as online ojek drivers in the context of political-economic risks that arise in digital platforms, using Ulrich Beck's Risk Society Theory. In the risk society, uncertainty and dependence on systems controlled by digital platforms are the main factors that shape the social identity of the drivers. This research finds that the identity of online ojek youth is formed through interactions with digital platforms that prioritize efficiency and profitability, as well as with the risks they face every day in working under systemic uncertainty.

This study aims to analyze the game strategy and formation effectiveness in futsal in college students. Futsal as a fast-paced sport requires the application of the right strategy and effective formation to win. One strategy that is often used is power play, which involves the goalkeeper as an additional player to strengthen the attack. The research method used is descriptive with an observation approach and video analysis of student futsal matches. The data was analyzed to determine the strategy pattern, the type of formation used, and the success of the strategy in creating opportunities and goals. The results showed that the effectiveness of the power play strategy was still relatively low with a success rate of around 6.7%, caused by main factors such as shooting blocked by opponents, inaccurate passing, and loss of ball control. Commonly applied formations are 2-2 and 1-2-1, which provide a balance between defense and attack, but their success is highly dependent on technical ability and coordination between players. Mastery of basic techniques such as passing, control, and shooting are key in executing strategies and formations effectively. This study concludes that the development of basic technical training and improvement of team coordination are very important to improve the effectiveness of game strategies and futsal formations in university students. The adaptation of strategies according to the match situation is also a determining factor in the team's success in the competition.