Universitas Proklamasi 45 Online Journals
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Hubungan Antara Sikap dan Perilaku Mengelola Sampah Pada Mahasiswa yang Tinggal di Rumah Pondok di Kabupaten Sleman Yogyakarta
Full text linkStudents who have studied environmental science should be able to manage their waste properly. However, in reality, there are still many students who litter and do not manage their waste. This study aims to empirically prove the relationship between Attitude and Waste Management Behavior among boarding house students in Sleman Regency. The population in this study was students who studied environmental science and lived in boarding houses in Sleman Regency. The sample used was 100 students. The sampling technique used was Snowball Sampling. Data collection in this study used 2 scales, namely the Waste Management Behavior Scale and the Attitude Scale. This research is a type of quantitative research. Data analysis in this research is correlation test and regression test. The correlation coefficient of Attitude towards Waste Management Behavior is 0.116. The results of this study indicate that there is no positive relationship between attitudes and waste management behavior among dormitory students in Sleman Regency
Studi Pengaruh Variasi Partikel Shotpeening terhadap Struktur Mikro dan Sifat Mekanis pada Aluminium Paduan
Full text linkThe objective of this research is to find out the effect of shotpeening particle variations on the microstructure, tensile strength, and impact strength of friction stir welding (FSW) joints. In the weld metal area after the material is subjected to friction stir welding (FSW), the material will experience softening and a decrease in mechanical properties compared to the raw material. The shotpeening process on the weld metal surface is expected to improve mechanical properties, because the weld metal surface will experience repeated pressure from the shotpeening particles as a forging effect. Friction welding (FSW) is carried out on materials made of 6061 aluminum alloy and the material has a thickness of 3 mm, with butt joint welding. The friction welding process uses an Aciera brand milling machine, the feeding speed on the machine is set to 18 mm / minute and the spindle rotation is 910 rpm. Shotpeening particles use steel ball and aluminum oxide, namely S 230, Al 24, Al 54. The results of microstructure testing show that the forging effect of shotpeening causes deformation in the surface layer to a depth of 700 µm. The results of tensile testing on FSW joints with variations in shotpeening particles: S 230, Al 24, Al 54 show the optimum tensile strength in shotpeening with Al 54 particles of 208 MPa, and the results of impact testing show the optimum impact price in shot peening with S 230 particles of 0.57 J / mm2
Shift Work, Social Support, and Work Motivation Among Terminal Employees: A Case Study of Gambut Barakat Terminal, South Kalimantan
Full text linkThis study examines how a shift work system affects employees’ work motivation, considering social support as a mediating mechanism. The research took place at Gambut Barakat Type A Terminal, South Kalimantan, a public service facility that operates continuously with rotating morning, afternoon, and night schedules. A quantitative, causal comparative design was employed, and all 35 shift employees were surveyed using standardized instruments for shift work and social support. Data were analyzed using Partial Least Squares Structural Equation Modeling. The results indicate that the shift work system has a positive impact on work motivation (β = 0.536) and also enhances perceived social support (β = 0.763). Social support has a positive effect on motivation (β = 0.383) and partially mediates the relationship between shift work and motivation (β = 0.409). The model yields an R² of 0.744, indicating that 74.4% of the variance in motivation is explained by the combined effect of shift work and social support. These findings highlight the importance of transparent and well-managed rosters accompanied by a supportive interpersonal climate. In continuous public service operations, equitable scheduling, combined with peer and supervisory support, can enhance employee motivation and help sustain performance over time
Pengaruh Prosocial dan Intrinsic Motivation terhadap Employee Engagement dengan Mediasi Affective Commitment di Rumah Sakit Gigi dan Mulut
Full text linkEmployee engagement has become a topic of research and discussion among practitioners and academics in recent years. Many healthcare workers are experiencing job dissatisfaction, stress, and burnout. Many feel unappreciated by their organizations and are considering quitting due to long working hours. This situation leads many healthcare professionals to contemplate leaving their jobs. This research contributes to filling the gap in studies on educational dental teaching hospitals (RSGM) industries regarding the influence of prosocial and intrinsic motivation on employee engagement, mediated by affective commitment. The hypothesis was tested on samples from 224 healthcare and medical personnel at 5 Educational RSGM, using structural equation modeling (SEM) with AMOS software version 24. The test results indicated that prosocial motivation had no significant impact on employee engagement, whereas the other six hypotheses were confirmed as significant
Strategi Pengembangan Model Bisnis Koperasi Rumput Laut dengan Pendekatan Cooperative and Mutual Enterprise Business Model Canvas
Full text linkThis study aims to develop a seaweed cooperative business model based on the Cooperative and Mutual Enterprise Business Model Canvas (CME-BMC) to enhance the cooperative’s competitiveness and adaptive capacity in supporting small-scale farmers. The research utilizes a qualitative case study of a seaweed cooperative in West Java, integrating the CME-BMC with the VRIO, PESTEL, and SWOT frameworks through literature review, in-depth interviews, and structured questionnaires. The findings show that the current business model is aligned with cooperative principles, but it still has weaknesses that need to be strengthened for the cooperative to effectively compete and grow. The cooperative\u27s key resources and capabilities include integrated post-harvest and processing facilities, experienced members, democratic governance, and effective management of the value chain across both upstream and downstream activities. The external environment presents both opportunities and challenges within the industry, including policy support, land allocation issues, climate risks, price fluctuations, and downstream regulations. Nine development strategies were formulated and translated into a new, more integrated and member-oriented business model. This study offers practical and theoretical contributions by demonstrating how the integration of the CME-BMC with strategic analysis can produce a more adaptive, sustainable, and competitive cooperative business model
Pengaruh Penggunaan Koil Aftermarket terhadap Kinerja Mesin Pembakaran Internal dengan Variasi Nilai Oktan Bahan Bakar
No full textPenelitian ini bertujuan untuk menganalisis pengaruh penggunaan koil aftermarket terhadap kinerja mesin pembakaran internal dengan variasi nilai oktan bahan bakar. Pengujian dilakukan pada sepeda motor Yamaha Vixion 150 cc menggunakan koil standar dan koil aftermarket dengan tiga jenis bahan bakar, yaitu oktan 90, 92, dan 98. Parameter yang diukur meliputi daya, torsi, dan konsumsi bahan bakar spesifik (SFC). Hasil penelitian menunjukkan bahwa koil aftermarket menghasilkan daya tertinggi sebesar 16.6 HP pada putaran 9232 rpm dengan bahan bakar oktan 98, sementara koil standar mencapai daya maksimal sebesar 16.1 HP. Torsi tertinggi yang dihasilkan oleh koil aftermarket sebesar 14.47 N.m dengan bahan bakar oktan 92. Penggunaan koil aftermarket cenderung meningkatkan daya dan torsi, namun juga menyebabkan kenaikan konsumsi bahan bakar dibandingkan koil standar. Penelitian ini memberikan wawasan tentang optimalisasi performa mesin melalui modifikasi koil pengapian dan pemilihan bahan bakar yang sesuai
ANALISIS EMISI GAS BUANG MESIN DIESEL TIPE COMMON RAIL DENGAN VARIASI BAHAN BAKAR B0 DAN BIO DIESEL B40
Full text linkKebutuhan akan sumber energi yang ramah lingkungan mendorong pengembangan bahan bakar alternatif berbasis biomassa, salah satunya biodiesel. Pemerintah Indonesia telah mentargetkan penerapan campuran biodiesel hingga B40 sebagai bagian dari strategi transisi energi nasional. Penelitian ini bertujuan untuk menganalisis pengaruh penggunaan bahan bakar campuran biodiesel 40% (B40) terhadap konsumsi bahan bakar dan emisi gas buang pada mesin diesel tipe common Rail Direct Injection(CRDI) dibandingkan bahan bakar solar murni (B0). Pengujian dilakukan menggunakan variasi putaran mesin 800, 1500, dan 2000 rpm, dengan pengukuran parameter Fuel Consumption Ratio (FCR), dan emisi gas buang (CO, CO₂, NOx, dan O₂). Hasil penelitian menunjukkan bahwa penggunaan B40 menyebabkan peningkatan konsumsi bahan bakar sebesar 5–10% akibat nilai kalor yang lebih rendah, namun daya keluaran mesin tetap setara dengan B0 karena sistem injeksi common rail mampu melakukan kompensasi tekanan secara adaptif. Dari aspek emisi, B40 menghasilkan penurunan emisi CO hingga 30% dan penurunan NOx sebesar 15–20%, disertai dengan sedikit peningkatan CO₂ akibat pembakaran yang lebih sempurna. Kandungan oksigen residu (O₂) pada gas buang B40 sedikit lebih rendah dibandingkan B0, menandakan pemanfaatan oksigen biodiesel yang lebih efisien dalam proses pembakaran. Hasil penelitian menunjukkan bahwa mesin diesel tipe common rail mampu beroperasi secara stabil menggunakan bahan bakar B40 tanpa modifikasi sistem, sekaligus menghasilkan profil emisi yang lebih bersih dan efisiensi pembakaran yang baik.
 
Evaluation Of Mud Logging And Wellsite Geology Data For Geothermal Feed Zone Identification In Well Dug-L6, Gea Field, South Sumatra
Full text linkGeothermal drilling requires precise identification of feed zones to optimize well productivity and minimize operational risks. This study evaluates the integration of mud logging and wellsite geological data for feed zone identification during the drilling of Well DUG-L6 in the Gea Field, South Sumatra. The research focuses on directional drilling within the 12¼” and 9⅞” sections, covering depths from 1300 to 2593 m measured depth (mMD). Real-time drilling parameters such as rate of penetration (ROP), weight on bit (WOB), standpipe pressure (SPP), and torque were analyzed alongside mud logging indicators and cuttings description. These datasets were integrated to identify anomalies including drilling breaks, circulation losses, temperature variations, and hydrothermal alteration that collectively serve as proxies for reservoir permeability.
Results indicate three significant drilling breaks at 1388–1389.7 mMD, 1667–1669 mMD, and 2495.7–2497 mMD, each marked by abrupt increases in ROP, reductions in WOB, and thermal responses at surface level. Total loss circulation (TLC) occurred continuously from 1355 to 2593 mMD, confirming extensive fracture-related permeability in the deeper section. Cutting evaluation revealed lithologies dominated by dacitic lithic tuff and andesitic volcanic units, with hydrothermal alteration characterized by chlorite and illite mineral assemblages. These features are consistent with fluid–rock interaction and indicate the presence of active geothermal upflow pathways. Integration of drilling anomalies and lithological observations provided strong evidence of productive feed zones that align with structural targets defined in the subsurface model.
This study demonstrates that real-time integration of drilling parameters and wellsite geological data provides a robust approach for early identification of geothermal feed zones. Two primary productive intervals 1300–1355 mMD and 2300–2593 mMD were delineated by the concurrence of significant drilling breaks, the onset and persistence of total loss circulation (from 1355 mMD to TD), BHCT anomalies exceeding 55 °C (peaks of 63.4 °C and 60.6 °C), and the presence of hydrothermal alteration minerals. These findings underscore the operational value of mud logging and wellsite geology as reliable, cost-effective tools for reservoir early characterization, enabling informed decision-making during drilling and supporting the sustainable development of geothermal resources in Indonesia
Analisis Keterbatasan Regulasi Sanksi Malpraktik Tenaga Medis Asing dan Konsekuensinya Terhadap Penegakan Hukum di Indonesia
Full text linkIndonesia as a developing country, upholds human rights, including the right to health guaranteed in the 1945 Constitution. In this context, the presence of foreign medical personnel is an important part in supporting national health services. However, regulations governing foreign medical personnel, especially regarding malpractice sanctions and supervision mechanisms, still have significant weaknesses that have an impact on patient protection and the effectiveness of law enforcement. This study aims to identify the weaknesses of these regulations and analyze the consequences of their limitations on the legal system in Indonesia. The method used is normative legal research with a normative juridical approach, examining laws and regulations, legal literature, court decisions, and legal doctrine qualitatively. The results reveal that the existing administrative and criminal sanctions are still not firm and specific enough for foreign medical personnel, while supervision and competency verification have not been effective and integrated. In addition, complaint mechanisms and legal protection for patients who are victims of malpractice are still difficult to access, and there are ambiguities in legal jurisdiction, especially in cross-border cases
Pengaruh Price Discount, Bonus Pack, dan Cashback terhadap Impulse Buying Produk di Marketplace Shopee
No full textModernization and ease of life have become direct consequences of rapid technological progress. The surge in internet use, particularly in e-commerce, has become a major driver of economic growth. Shopee is the largest e-commerce platform in Indonesia, standing out with various promotional strategies, including price discounts, bonus packs and cashback. A quantitative approach using accidental sampling techniques was used for 100 respondents with the aim of finding out the impact of price discounts, bonus packs and cashback on impulse buying. It was found from the research results that price discounts, bonus packs and cashback had an impact of 22.6% on impulse buying on the Shopee marketplace. Partially, only the bonus pack has a significant impact on impulse buying on the Shopee marketplace