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Rina Puji Lestari; Mien Zyahratil Umami

Garina 2025 Akademi Kesejahteraan Sosial Ibu Kartini Semarang

The continuously evolving fashion industry encourages designers to innovate, one such way being the adaptation of Japanese origami techniques into avant-garde fashion design. This research explores the application of origami butterfly forms in garments using a Research and Development (R&D) methodology. This methodology involves stages such as (1) potential problems, (2) data collection (literature review, observation, documentation), (3) product design, (4) design validation, (5) design revision, (6) product trial, (7) product revision, (8) wear trial, (9) product revision, and (10) mass production.The objectives of this study are to understand the application of innovative Japanese origami techniques in avant-garde fashion and to detail the garment creation process utilizing these techniques. In this research, the author focuses on the origami form as the central point. The findings indicate that origami techniques can produce unique and strong visual structures. A technical tip for creating these garments is to use a larger stitch size (7 stitches per inch) when sewing synthetic leather to prevent material damage. Expert validation suggests that this design has the potential to be developed as a contemporary fashion innovation, blending traditional values with modernity. This research is expected to serve as a reference for designers and academics interested in incorporating traditional techniques into modern fashion works.

Kandriasari, Annis; Cahyana, Cucu; Fadiati, Ari; Agniya, Balqish Fatra

Manfaat : Jurnal Pengabdian Pada Masyarakat Indonesia 2025 Asosiasi Riset Ilmu Tanaman Dan Hewan Indonesia

This training supports the achievement of Sustainable Development Goals (SDGs), specifically SDG 4 (Quality Education), SDG 8 (Decent Work and Economic Growth), and SDG 12 (Responsible Consumption and Production). The community service activity follows the UNJ Community Service Strategic Plan (PPM Renstra) 2021–2025, focusing on education and environmental initiatives. A needs analysis conducted at SMAN 1 Muara Gembong, particularly in the school canteen, revealed that many food items sold lacked attention to health and hygiene, and did not optimize local food products. Based on this, training on personal hygiene education for the school community is needed to support school entrepreneurship programs. The training uses a practical approach integrated with digital technology through poster creation. Results showed that participants increased their awareness of health and hygiene, which improved the quality of their entrepreneurial products. The training included material on personal hygiene in entrepreneurship, with educational posters as the output. Evaluation was done using questionnaires, with data analyzed descriptively. Expected outcomes include the publication of an article, mass media exposure, YouTube video, partnership recognition, intellectual property rights registration, educational posters, and a profile of personal hygiene education for the school community in canteen management.

Miptahul Jannah Harahap; Andar Sri Sumantri; Sulistyowati Sulistyowati

Logistics and Supply Chain Insights 2025 Indonesian Maritime Researchers and Lecturers

This research aims to analyze the partial and simultaneous influence of four independent variables—Ticket Price (X_1), Service Quality (X_2), Customer Trust (X_3), and Promotion (X_4)—on Ship Ticket Purchase Decisions (Y) at PT. PELNI Semarang Branch. Utilizing an associative quantitative method with a sample of 100 passenger respondents (N=100), the data were analyzed using multiple linear regression (SPSS 22.0). The model demonstrated a strong explanatory power, accounting for 55.7% of the variation in purchase decisions (Adjusted\ R^2 = 0.557). The t-test results indicate that all independent variables have a positive and significant influence on Purchase Decisions (all t_{hitung} > 1.9853). The Promotion variable (X_4) showed the strongest individual influence (\beta = 0.282, t=4.777), highlighting the critical nature of effective information dissemination and communication strategies in attracting and guiding mass maritime consumers. Customer Trust (X_3) and Service Quality (X_2) also proved highly significant, affirming the essential role of State-Owned Enterprise (BUMN) integrity and service reliability in mitigating perceived maritime travel risks. Managerial implications suggest PT. PELNI prioritizes enhancing Promotion through digital media and maintaining the fairness of Price setting, which remains a key consideration for this market segment.

Tessa Julia Tifania; Zesika Intan Navelia; Siti Fadhilah

Jurnal Siti Rufaidah 2025 PPNI UNIMMAN

heritage: persistent power Deficiency (CED) among pregnant women is a dietary problem that may have an effect on both maternal and fetal fitness. one of the influencing factors is the mother’s nutritional know-how. This look at aimed to investigate the relationship between nutritional knowledge and the prevalence of CED amongst pregnant ladies in the running area of Tempunak clinic. take a look at methods: This study employed an analytic observational design with a pass-sectional technique. The population consisted of 88 pregnant girls selected the use of purposive sampling. studies gadgets blanketed a dietary understanding questionnaire and Mid-higher Arm Circumference (MUAC) measurement to decide CED fame. statistics analysis turned into executed the use of univariate analysis within the form of frequency distribution, and bivariate analysis with the Chi-rectangular check. effects: maximum respondents had exact nutritional information (fifty nine.09%), and greater than 1/2 did not experience CED (55.68%). The Chi-square check received a p-cost of 0.000 (<zero.05) with a Chi-square fee of 30.410, indicating a massive relationship between dietary knowledge and CED. Pregnant ladies with top dietary understanding were much less in all likelihood to enjoy CED, even as all respondents with terrible information skilled CED. end: there's a large courting between dietary understanding and the incidence of CED amongst pregnant girls. continuous dietary training is vital to lessen the risk of CED and enhance maternal fitness.

Natalia Yeni; Ellyzabeth Sukmawati; Eddy Wibowo

Jurnal Kesehatan dan Kedokteran 2025 Lembaga Pengembangan Kinerja Dosen

Oxytocin massage is a technique used to stimulate the release of the hormone oxytocin, which plays a vital role in breastfeeding. Spinal massage stimulates the parasympathetic nervous system, which then triggers the release of oxytocin. This hormone causes contractions in the muscle cells surrounding the milk ducts, thereby promoting breast milk production. The purpose of this study was to determine the effect of oxytocin massage on increasing breast milk production in postpartum mothers. This study used a quantitative design with a quasi-experimental approach, namely a one-group pretest-posttest design. The study population was postpartum mothers with breast milk flow problems at the Bandarharjo Community Health Center, Semarang City. The sampling technique used was purposive sampling, where researchers selected samples based on certain characteristics. Data collection was carried out using a questionnaire. Data analysis used the Chi-Square test. The results of the study showed that the calculated Chi-Square value on the first day (62,000) was greater than the Chi-Square table (12,591), on the second day (54,866 > 23,684), and the third day (58,117 > 32,670). Based on these results, H0 was rejected and Ha was accepted, which means there was a significant effect of oxytocin massage on the smooth production of breast milk in postpartum mothers at the Bandarharjo Community Health Center.

M. Ulin Nuha; Mudhoifah, Mudhoifah; Murti Nuryati; Siti Khomsatun

Jurnal Kesehatan dan Kedokteran 2025 Lembaga Pengembangan Kinerja Dosen

This study examines postpartum nursing care for mothers undergoing Sectio Caesarea (SC) with the primary nursing diagnosis of ineffective breastfeeding. The purpose is to evaluate the effectiveness of oxytocin massage intervention in improving breastfeeding outcomes in post-SC mothers. The study was conducted in Mawar Ward, RSUD dr. H. Soewondo Kendal, involving four patients experiencing delayed lactation, difficulty in baby latching, and psychological challenges such as anxiety and lack of confidence. The intervention was based on the Indonesian Nursing Intervention Standards (SIKI), focusing on observation, therapeutic actions, education, and collaboration with healthcare teams and family members. Oxytocin massage was performed 2–3 times daily, complemented by warm compresses, breastfeeding position training, and emotional support. The results indicated significant improvements: increased breast milk production, better baby latching, reduced maternal anxiety, and higher self-confidence in breastfeeding. This evidence-based approach highlights that comprehensive postpartum nursing care—integrating physical, psychological, and family support—plays a crucial role in ensuring breastfeeding success and overall maternal recovery after SC.

Erlina, Erlina; Nurul Huda; Marduati, Marduati

FUNDAMENTUM : Jurnal Pengabdian Multidisiplin 2025 Asosiasi Peneliti Dan Pengajar Ilmu Sosial Indonesia

Infancy is a crucial golden period for determining the quality of a child's future growth and development. Infant massage has long been recognized for its numerous benefits for infant growth and development. Various studies have shown that infant massage can increase weight gain, improve sleep quality, strengthen the immune system, and aid digestion. Many parents still lack understanding of infant massage. Some assume that infant massage is only performed on sick babies and is performed by traditional healers or medical personnel skilled in infant massage. The purpose of this community service is to increase mothers' knowledge about infant massage through outreach. The target audience was 22 mothers with babies in Gampong Barat, Nisam District, North Aceh Regency. The implementation method used was lectures, discussions, and demonstrations. The results showed that the majority of mothers' knowledge was in the good category after the outreach. This was due to the mothers' enthusiasm in participating in the outreach. Outreach is an effective method for increasing knowledge. Mothers are expected to continue to improve their knowledge about infant massage by increasing their interest in seeking information, whether through reading books, the media, or other sources.

Pristi Wahyudi; Dandy Patria W; Sapto Pramono

WISSEN : Jurnal Ilmu Sosial dan Humaniora 2025 Asosiasi Peneliti Dan Pengajar Ilmu Sosial Indonesia

This study examines the challenges and solutions in bureaucratic transformation towards digitalization in government institutions, with a focus on the administrative services for issuing Certificates of Existence of Mass Organizations/NGOs by the National Unity and Politics Agency (Kesbangpol). The main obstacles identified include data fragmentation, outdated regulations, rigid organizational structures, and resistance to change. Limited human resource competency and political instability also hamper the implementation of reforms. To address these challenges, it is crucial to develop a comprehensive reform roadmap, simplify regulations, and strengthen data integration. Cybersecurity infrastructure development, organizational restructuring, and human resource capacity building through digital training are essential. Furthermore, strong political commitment is crucial to ensure the sustainability of reforms. Interviews indicate that service quality, verification standards, and speed of service influence public trust and satisfaction. Successful bureaucratic reform requires a combination of technological, regulatory, organizational, and cultural strategies to create modern and responsive public services.

M. Ulin Nuha; Mudhoifah; Murti Nuryati; Siti Khomsatun

Jurnal Pengabdian Masyarakat Terapan 2025 Lembaga Pengembangan Kinerja Dosen

This study examines postpartum nursing care for mothers undergoing Sectio Caesarea (SC) with the primary nursing diagnosis of ineffective breastfeeding. The purpose is to evaluate the effectiveness of oxytocin massage intervention in improving breastfeeding outcomes in post-SC mothers. The study was conducted in Mawar Ward, RSUD dr. H. Soewondo Kendal, involving four patients experiencing delayed lactation, difficulty in baby latching, and psychological challenges such as anxiety and lack of confidence. The intervention was based on the Indonesian Nursing Intervention Standards (SIKI), focusing on observation, therapeutic actions, education, and collaboration with healthcare teams and family members. Oxytocin massage was performed 2–3 times daily, complemented by warm compresses, breastfeeding position training, and emotional support. The results indicated significant improvements: increased breast milk production, better baby latching, reduced maternal anxiety, and higher self-confidence in breastfeeding. This evidence-based approach highlights that comprehensive postpartum nursing care—integrating physical, psychological, and family support—plays a crucial role in ensuring breastfeeding success and overall maternal recovery after SC.

Nazwa Husna Effendy; Riski Hamonangan Sitepu

Jurnal Ilmu Pendidikan 2025 Lembaga Pengembangan Kinerja Dosen

This study aims to analyze the role of mass media in influencing the escalation of social conflict in society. Mass media, both conventional and digital, have significant power in shaping public opinion and influencing public perceptions of sensitive social issues. In the context of Indonesia's pluralistic society, non-objective and provocative reporting can accelerate the rise of social tensions and exacerbate intergroup conflict. This study uses a qualitative descriptive approach with a literature review method, drawing on sources from various scientific journals, books, and previous research reports. The results indicate that media can act as both a trigger and a mitigator of conflict, depending on how information is presented to the public. Media that prioritizes the principles of peace journalism can help create cross-group communication, foster empathy, and strengthen social solidarity. Conversely, biased and sensational media can exacerbate differences and lead to social disintegration. Therefore, media practitioners require moral responsibility, professional ethics, and social awareness to ensure their function remains oriented toward truth, justice, and peace. Thus, mass media holds a strategic position in building social harmony amidst the diversity of Indonesian society.

Silvia Mona; Kiki Rizki Dasaryandi; Susanti Susanti; Siti Haminah; Selvi Novira

Jurnal Pengabdian Masyarakat Terapan 2025 Lembaga Pengembangan Kinerja Dosen

Postpartum anxiety is a psychological problem that often occurs after childbirth and can have a direct impact on decreased breast milk production. Non-pharmacological efforts that can help overcome this are Spiritual Emotional Freedom Technique (SEFT) therapy and Endorphin, Oxytocin, and Suggestive Massage Stimulation (SPEOS). This community service activity aims to improve comfort, calmness, and increase breast milk production through the application of a combination of SEFT and SPEOS therapy to postpartum mothers in the Sambau Community Health Center, Batam City. The activity method is carried out through education, demonstrations, and direct practice with postpartum mothers given to 48 postpartum mothers. The results of the activity showed an increase in mothers' knowledge about SEFT and SPEOS relaxation techniques, about managing anxiety, and how to increase breast milk production as obtained from the results of qualitative evaluations through interviews and group discussions. This activity received a positive response from participants and local health workers, and is recommended for routine implementation in community midwifery services.

Muhammad Daniyal

Jurnal Riset Ilmu Farmasi dan Kesehatan 2025 Asosiasi Riset Ilmu Kesehatan Indonesia

Left ventricular hypertrophy (LVH) can be identified through both electrocardiography (ECG) and echocardiography, with echocardiography recognized as the gold standard for the assessment of LVH. This imaging modality determines the presence of LVH by evaluating the left ventricular mass index (LVMI). For diagnostic purposes, LVH is defined in males as a left ventricular mass index greater than 115 g/m² and in females as greater than 95 g/m². Despite the high accuracy of echocardiography in diagnosing LVH, access to this examination is not universal across all healthcare facilities. Consequently, electrocardiography, a widely available, non-invasive, and cost-effective diagnostic tool, serves as an alternative for the diagnosis of LVH. Several criteria exist for the electrocardiographic assessment of LVH, including the Sokolow-Lyon and Cornell voltage criteria. However, the sensitivity of these electrocardiographic methods remains relatively low, with reported sensitivities of 17% for the Sokolow-Lyon criteria and 35% for the Cornell criteria. In left ventricular hypertrophy, the interstitium experiences changes characterized by fibrosis and other deposits. These alterations can reduce the expression of hypertrophic myocardial tension and limit the diagnostic capabilities of surface electrocardiograms. Additionally, several factors influence electrical tension, including variations in chest wall thickness, heart muscle activity, the distance of the electrode from the left ventricle, and lung activity. The presence of these limiting factors can increase the rate of false negatives in diagnosis. In 2017, Peguero and Lo Presti introduced novel criteria for the diagnosis of LVH, defined by evaluating the deepest S wave and summing it with the S wave in lead V4. According to these new criteria, LVH is identified as ≥ 2.8 mV in men and ≥ 2.3 mV in women. The Peguero-Lo Presti criteria demonstrate improved sensitivity when compared to traditional criteria such as Sokolow-Lyon and Cornell, offering enhanced diagnostic accuracy.

Munawir Rifqi; Nina Fentiana; Ika Ariyanti

Jurnal Praba : Jurnal Rumpun Kesehatan Umum 2025 STIKES Columbia Asia Medan

Hypertension is one of the most common diseases experienced by the community and poses a high risk of causing serious complications. Persistently elevated blood pressure can damage vital organs and increase the risk of cardiovascular diseases such as heart attacks, strokes and kidney failure. The purpose of this study is to determine the implementation of foot reflexology massage to reduce blood pressure in patients with hypertension. This research employed a case study approach involving two hypertensive patients at TK II Putri Hijau Hospital Medan. The Nursing care process included assessment, nursing diagnosis, planning, implementation, and evaluation. The results showed a decrease in both systolic and diatolic blod pressure after the foot reflexology intervention. The first patient experienced a reduction in blood pressure from 145/90 mmHg to 130/82 mmHg, while the second patient’s blood pressure from 144/89 mmHg to 128/82 mmHg. The study cocludes that the implementation of foot reflexology massage is proven to be efeective in lowering blood pressure in hypertensive patients. This therapy is recommended as a complementary intervention in nursing practice to assist in controlling hypertension.

Sri Maryati Ahmad; Sulistiyah Sulistiyah

Jurnal Ilmu Kesehatan dan Gizi 2025 Pusat Riset dan Inovasi Nasional

Background: Constipation is a common health problem among infants aged 6–12 months, which can lead to discomfort, feeding difficulties, and reduced quality of life. Non-pharmacological interventions, such as the I Love You (ILU) massage, have been suggested to improve bowel regularity and reduce gastrointestinal discomfort in infants. Objective: This study aimed to examine the effect of ILU massage on reducing constipation in infants aged 6–12 months at the South Bulango Health Center. Methods: A pre-experimental design with a one-group pretest–posttest approach was applied. Data on bowel movement frequency, stool consistency, and abdominal discomfort were collected before and after the intervention using structured observation sheets and caregiver questionnaires. Data analysis was performed using paired t-tests, with statistical significance set at p < 0.05. Results: The results showed a significant increase in bowel movement frequency from 2.1 ± 0.8 times per week before the intervention to 4.5 ± 1.0 times per week after the intervention (p = 0.000). Stool consistency improved from a mean Bristol score of 2.0 ± 0.6 to 4.0 ± 0.7 (p = 0.000), and abdominal discomfort decreased from 3.5 ± 1.0 to 1.2 ± 0.8 (p = 0.000). These findings indicate that ILU massage effectively alleviates constipation symptoms in infants. Conclusion: ILU massage is an effective, safe, and non-invasive method to reduce constipation in infants aged 6–12 months. Involving caregivers in the intervention enhances its effectiveness and supports parent–child bonding, making it suitable for integration into routine infant care at community health centers.

Rita Apriani; Qomariah Qomariah; Ellyzabeth Sukmawati

Jurnal Ilmu Kesehatan 2025 Lembaga Pengembangan Kinerja Dosen

Exclusive breastfeeding (ASI) is the provision of only breast milk to infants for the first six months without additional food or drink, including water. Breast milk has important benefits in improving infant health, growth, and survival. However, the coverage of exclusive breastfeeding in Indonesia, including in the Pasar Health Center in Prabumulih City, has not yet reached the national target of 80%. One factor influencing the success of exclusive breastfeeding is husband's support. The purpose of this study was to determine the correlation between husband's support and exclusive breastfeeding. The study used a quantitative approach with a cross-sectional design. The sample size was 49 mothers with infants aged 7–12 months. The study was conducted in the Pasar Health Center in May 2025. The results showed that 28 infants (57.1%) received exclusive breastfeeding, and 30 mothers (61.2%) reported receiving support from their husbands. Statistical tests using the chi-square test showed a significant relationship between husband's support and exclusive breastfeeding (p = 0.000). These findings indicate that husband's support plays an important role in successful breastfeeding. This research suggests that involving husbands in breastfeeding education and support is highly recommended to increase the coverage of exclusive breastfeeding in the community.

Nabila; Febriyanti, Eka; Wilson, Jerry

Jurnal Kesehatan Medika Udayana 2025 Sekolah Tinggi Ilmu Kesehatan Kesdam IX/Udayana

Background: A balanced diet is essential for maintaining health and nutritional status, commonly assessed using Body Mass Index (BMI). Dietary habits are influenced not only by physiological needs but also by psychological factors such as Body Image perception. Unrealistic perceptions of one’s body can lead to unhealthy eating behaviors and negatively impact nutritional status. Patisserie students, who are frequently exposed to high-calorie foods, may be particularly vulnerable to such challenges. Objective:  This study aims to examine the influence of Body Image perception on dietary patterns and BMI among patisserie students at the Medan Tourism Polytechnic. Methods: This study is an observational analytical study with a cross-sectional approach to 60 students of Medan Tourism Polytechnic. Body Image and eating pattern data were collected using a questionnaire, while BMI was obtained by measuring the weight and height of the subjects. Result: The data obtained were analyzed using the Chi-square Test. Based on the results of the analysis, a relationship was found between Body Image and eating patterns with a value of p = 0.006 (P < 0.05). However, there was no relationship between Body Image and BMI with a value of p = 0.391 (P> 0.05). Consclusion: There is a relationship between Body Image and eating patterns but there is no relationship between Body Image and BMI.

I Kadek Restu Saputra

JURNAL RISET RUMPUN ILMU HEWANI 2025 Pusat riset dan Inovasi Nasional

Canine dwarfism is a growth disorder resulting from physiological dysfunction within the endocrine system, primarily due to growth hormone (GH) deficiency commonly caused by abnormal pituitary development. GH and Insulin-like Growth Factor 1 (IGF-1) play essential roles in regulating the growth of bones, muscles, skin, and internal organs through the hypothalamic–pituitary–liver axis. Under normal conditions, the hypothalamus controls GH secretion, which subsequently stimulates the liver to produce IGF-1 as the main mediator of growth. Genetic abnormalities such as LHX3 mutations can impair somatotroph cell differentiation and reduce GH production, ultimately leading to decreased IGF-1 levels. The deficiency of these hormones disrupts chondrocyte proliferation in the epiphyseal plates, decreases muscle protein synthesis, and negatively affects the development of tissues such as skin, hair, and reproductive organs. This study was conducted using a literature review method by searching scientific databases and selecting relevant publications addressing the physiological, clinical, and pathophysiological aspects of canine dwarfism. Literature analysis indicates that GH deficiency leads to clinical manifestations such as stunted body size, thin and easily shedding hair, dry and infection-prone skin, reduced muscle mass, metabolic disturbances, and delayed reproductive maturation. Diagnosis is established through clinical evaluation, IGF-1 measurement as an indicator of GH activity, and radiographic assessment of epiphyseal plate development. Overall, a comprehensive understanding of the relationship between physiological abnormalities and clinical signs is crucial for early detection and appropriate management of dwarfism, providing a strong scientific foundation for understanding the hormonal mechanisms disrupted in this condition.

Milli Alfhi Syari; Hermansyah Sembiring; Muhammad Fadlan Siregar

Systematic Literature Review Journal 2025 International Forum of Researchers and Lecturers

The rapid growth of social media as a primary channel for information dissemination has triggered a significant surge in the distribution of hoaxes, potentially damaging social order, instigating mass disinformation, and threatening national security. This research aims to design an intelligent algorithm for hoax detection by integrating a critical thinking approach into Natural Language Processing (NLP)-based text processing. The algorithmic model is built using a combination of linguistic features, argument logic, and cognitive indicators such as the detection of unsubstantiated claims, identification of source bias, and evidence testing. To ensure accountability and transparency of the system, an Explainable AI (XAI) approach is applied so that classification results can be understood by non-technical users. The research results show that integrating critical thinking significantly improves detection accuracy to 93.1%, with an increase in precision and recall for detecting hoaxes based on emotional narratives. Beyond technical aspects, this model aligns with the mandate of Law of the Republic of Indonesia Number 11 of 2008 concerning Information and Electronic Transactions (ITE Law), particularly Article 28 paragraph (1), which prohibits the dissemination of false and misleading news that harms the public. Therefore, this system is not only scientifically relevant but also supports law enforcement and strengthens digital literacy in the post-truth era. These findings are expected to be a strategic contribution to the development of an ethical, critical, and responsible digital ecosystem.

Praise Astuti Mahmud; Reny Retnaningsih

Jurnal Ilmu Kesehatan dan Gizi 2025 Pusat Riset dan Inovasi Nasional

Preeclampsia is a pregnancy complication that contributes significantly to maternal and perinatal morbidity and mortality, especially in developing countries. Despite various preventive measures, preeclampsia is still frequently found at the primary health care level. This study aims to analyze the factors influencing the incidence of preeclampsia in pregnant women at the Tiley Care Community Health Center. This study used an observational analytical design with a cross-sectional approach. The study population was all pregnant women who visited antenatal care at the Tiley Care Community Health Center, with a sample of 60 respondents selected using a total sampling technique. Data were collected through a review of medical records and KIA books, then analyzed univariately and bivariately using the Chi-Square test with a significance level of α = 0.05. The results showed that maternal age, history of hypertension, nutritional status based on body mass index, and adherence to antenatal care visits had a statistically significant relationship with the incidence of preeclampsia. Meanwhile, parity did not show a significant relationship with the incidence of preeclampsia. This study concluded that the incidence of preeclampsia is influenced by various maternal factors and maternal health behaviors during pregnancy. These findings underscore the importance of implementing risk-based antenatal care through early screening, ongoing monitoring, and increased adherence to antenatal care visits as a preventative measure for preeclampsia at the primary healthcare level.

Eghi Eghi; Albertus Juvensius Pontus; Agus Winarno; Tommy Trides; Rety Winonazada

Venus: Jurnal Publikasi Rumpun Ilmu Teknik 2025 Asosiasi Riset Ilmu Teknik Indonesia

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.