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Mika Lestari; Qayla Sa’adatu Gina; Salsa Dzakia Fitriani; Endah Ayu Atika; Nur Nadya Anggraeni +5 more

Jurnal Pengabdian Masyarakat 2025 Lembaga Pengembangan Kinerja Dosen

This study aims to improve the welfare of curly red chili farmers in Tanjung Seteko Village through the innovation of processing fresh chili into chili oil. The background of this research lies in the low added value of fresh chili and frequent price fluctuations that cause unstable farmer incomes. The study employed a descriptive qualitative approach involving preparation, implementation, and evaluation stages, with purposive sampling covering farmers, farmer group members, housewives, and village officials. Data were collected through observation, interviews, documentation, and questionnaires. The results indicate that processing chili into chili oil can extend shelf life up to 1–2 months at room temperature and more than 6 months under refrigeration, reduce harvest losses by 30–40%, and significantly increase economic value compared to selling fresh chili. A single production process using 5 kg of curly red chili yields 16 liters of chili oil with an estimated selling price of IDR 1.500.000-2.000.000 per production cycle, showing that simple processing activities can provide substantial added value for farmers. Beyond economic benefits, this innovation strengthens community empowerment by improving processing skills, encouraging economic independence, promoting participation in value-added businesses, and reinforcing local economic resilience. The social impacts also include youth and women empowerment and broader opportunities for local product–based entrepreneurship. The study recommends continuous capacity development, digital marketing strategies, and ongoing mentoring to optimize farmer welfare. Therefore, processing curly red chili into chili oil is a strategic solution to enhance income, skills, and sustainable rural economic development.

Mika Lestari; Qayla Sa’adatu Gina; Salsa Dzakia Fitriani; Endah Ayu Atika; Nur Nadya Anggraeni +5 more

Jurnal Pengabdian Masyarakat 2025 Lembaga Pengembangan Kinerja Dosen

This study aims to improve the welfare of curly red chili farmers in Tanjung Seteko Village through the innovation of processing fresh chili into chili oil. The background of this research lies in the low added value of fresh chili and frequent price fluctuations that cause unstable farmer incomes. The study employed a descriptive qualitative approach involving preparation, implementation, and evaluation stages, with purposive sampling covering farmers, farmer group members, housewives, and village officials. Data were collected through observation, interviews, documentation, and questionnaires. The results indicate that processing chili into chili oil can extend shelf life up to 1–2 months at room temperature and more than 6 months under refrigeration, reduce harvest losses by 30–40%, and significantly increase economic value compared to selling fresh chili. A single production process using 5 kg of curly red chili yields 16 liters of chili oil with an estimated selling price of IDR 1.500.000-2.000.000 per production cycle, showing that simple processing activities can provide substantial added value for farmers. Beyond economic benefits, this innovation strengthens community empowerment by improving processing skills, encouraging economic independence, promoting participation in value-added businesses, and reinforcing local economic resilience. The social impacts also include youth and women empowerment and broader opportunities for local product–based entrepreneurship. The study recommends continuous capacity development, digital marketing strategies, and ongoing mentoring to optimize farmer welfare. Therefore, processing curly red chili into chili oil is a strategic solution to enhance income, skills, and sustainable rural economic development.

M Aldi Ramadhan; Suratni Ginting; Meriah Kita Deliani

Jurnal Transformasi Bisnis Digital 2025 Asosiasi Riset Ilmu Manajemen Kewirausahaan dan Bisnis Indonesia

Manifest is a list of cargo contents carried by a ship, which contains the type of goods, cargo number, sender's name and recipient's address at the destination port also called a bill of lading. When handling manifest documents in the shipping world, it requires the issuance of manifests as a condition for transporting goods and the obstacle is that the cargo shrinks too much during ullage so that the final result of the load causes delays in processing manifest documents. In the research paper made by the author using the field method (Field Search) and also with the research method of library study (Library Study) obtained from references from the library of the Indonesian Maritime Polytechnic Adiguna Medan (Poltek AMI) the purpose of writing this paper is to find out how to handle liquid bulk cargo manifest documents. As well as efforts made so that the handling of manifest documents runs with smoothly organized procedures at PT Seroja Jaya Agensi Kuala Tanjung. As for efforts to run smoothly when handling manifest documents, Among them shipping instructions must be sent on time by the Shipper when the ship has not docked and before the ship loads palm oil products at jetty A Multi Nabati Asahan.

Ningsih, Arista Wahyu; Jihan Fahiroh Nur Arifin; Retno Wulan Devitri; Rusdiana Tri Septiarini; Elvira Silvany Zahara +6 more

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

Extraction is a crucial stage in obtaining bioactive compounds from natural materials that have potential as medicinal, cosmetic, or nutraceutical ingredients. Among the various extraction methods available, maceration remains one of the most widely used techniques due to its simplicity, cost-effectiveness, and ability to maintain the stability of active compounds. The maceration process involves soaking powdered plant material in a suitable solvent at room temperature for a certain period, accompanied by periodic stirring to facilitate the diffusion of active compounds into the solvent. This method is particularly effective for extracting polar and semi-polar compounds such as flavonoids, phenolics, and essential oils that are sensitive to heat. The review shows that the effectiveness of maceration is influenced by several key factors, including the type and concentration of solvent, particle size of the material, duration of soaking, and stirring frequency. The use of ethanol with higher concentrations generally yields greater extract recovery and higher levels of active compounds. In addition, maceration is considered environmentally friendly because it requires no excessive heating and can employ safe, natural solvents. Therefore, despite the development of advanced extraction technologies, maceration remains a relevant, practical, and efficient method for phytochemical extraction, especially in laboratory research and small-scale herbal industries.          

Anindya Gustria Nirwasita; Adis Dewanti Rachmanda

Filosofi : Publikasi Ilmu Komunikasi, Desain, Seni Budaya 2025 Asosiasi Seni Desain dan Komunikasi Visual Indonesia

This study aims to analyze gender representation in the L’Oréal Paris Elvive Extraordinary Oil advertisement using Sara Mills’ Critical Discourse Analysis (CDA) approach. The advertisement functions not only as a promotional medium for hair-care products but also as a site of meaning production that shapes social constructions of beauty, women’s roles, and power relations within society. Through the visuals and narrative presented, women are portrayed as the central focus as well as symbols of ideal beauty, characterized by shiny hair, an elegant appearance, and a confident demeanor. The analysis shows that women in the advertisement are positioned primarily as visual objects, while the L’Oréal Paris brand takes the role of the subject that provides solutions to women’s problems—specifically damaged hair. The use of the iconic slogan “Because you’re worth it” constructs a discourse suggesting that women’s self-worth and personal value are closely tied to physical appearance, especially the condition of their hair. Thus, the advertisement not only delivers commercial messages but also carries ideological implications about beauty standards that women are expected to meet. This study concludes that advertising plays a crucial role in reproducing contemporary gender norms and influences how society interprets women’s identity and value through the visual representations it presents.

Ulul Ilmi; Eko Vibi Nurwansyah

Pemberdayaan Masyarakat: Jurnal Aksi Sosial 2025 Lembaga Pengembangan Kinerja Dosen

The Field Work Practice (PKN) carried out at PT MK Prima Indonesia focused on the implementation of periodic maintenance practices for the premoulding hydraulic press machine as an effort to maintain machine performance and operational lifespan. The main activities included identifying critical components such as the hydraulic system, valves, pressure hoses, and oil filters; conducting direct observation of common disruptions; and performing daily maintenance checklists that covered pressure monitoring, operating temperature, leakage detection, machine cleanliness, and lubrication conditions. Comprehensive cleaning procedures, condition-based filter replacement, and functional testing were also conducted to ensure reliability and safety in the production process. The implementation methods involved participatory observation, interviews with technicians regarding common failure patterns, visual and functional inspections, as well as the use of structured checklists supported by inspection documentation. The results indicate a significant decrease in the frequency of disturbances caused by leaks and oil contamination, improved compliance with routine inspection procedures, and enhanced machine readiness during operations. The introduction of structured documentation and simple technical training further improved technicians’ ability to detect early signs of abnormalities in the hydraulic system. As a recommendation, the company is advised to strengthen the use of digital recording systems, adjust filter replacement intervals based on actual machine conditions, and implement regular training programs focusing on contamination control and predictive maintenance.

Ulul Ilmi; Eko Vibi Nurwansyah

Pemberdayaan Masyarakat: Jurnal Aksi Sosial 2025 Lembaga Pengembangan Kinerja Dosen

The Field Work Practice (PKN) carried out at PT MK Prima Indonesia focused on the implementation of periodic maintenance practices for the premoulding hydraulic press machine as an effort to maintain machine performance and operational lifespan. The main activities included identifying critical components such as the hydraulic system, valves, pressure hoses, and oil filters; conducting direct observation of common disruptions; and performing daily maintenance checklists that covered pressure monitoring, operating temperature, leakage detection, machine cleanliness, and lubrication conditions. Comprehensive cleaning procedures, condition-based filter replacement, and functional testing were also conducted to ensure reliability and safety in the production process. The implementation methods involved participatory observation, interviews with technicians regarding common failure patterns, visual and functional inspections, as well as the use of structured checklists supported by inspection documentation. The results indicate a significant decrease in the frequency of disturbances caused by leaks and oil contamination, improved compliance with routine inspection procedures, and enhanced machine readiness during operations. The introduction of structured documentation and simple technical training further improved technicians’ ability to detect early signs of abnormalities in the hydraulic system. As a recommendation, the company is advised to strengthen the use of digital recording systems, adjust filter replacement intervals based on actual machine conditions, and implement regular training programs focusing on contamination control and predictive maintenance.

Titi Resnawati Nazara; Ni Putu Martini Dewi

International Journal of Management Science and Business 2025 International Forum of Researchers and Lecturers

Poverty is a complex and multidimensional problem. It can be characterized as a condition in which there is a lack of aspects related to the quality of life. North Sumatra Province is known as one of the richest provinces in Indonesia with abundant natural resources and agricultural products such as petroleum, natural gas, palm oil, rubber, and forest products used as industrial materials. However, it still ranks among the provinces with the highest poverty rates in Indonesia. This study aims to analyze the effect of unemployment rate, economic growth, and Human Development Index (HDI) on poverty in 14 districts/cities of North Sumatra Province during the 2016–2023 period. The analytical method used is panel data regression with the Fixed Effect Model (FEM) approach. The results of this study indicate that simultaneously, the three independent variables have a significant effect on poverty. Partially, unemployment has a positive and significant effect, while economic growth and HDI have no significant effect on poverty.

Yosian Bagas Mahendra Febriansyah; Arif Rahman Saleh; Sigit Mujiarto

Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer 2025 Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Salah satu bentuk pengolahan limbah menjadi energi yang berasal dari limbah padat perkotaan adalah sampah bahan bakar turunan atau Refuse Derived Fuel (RDF). Terdapat berbagai teknologi pengeringan yang biasanya digunakan untuk pengeringan RDF. Contoh penerapannya adalah oil tube rotary dryer sebagai alternatif dari steam tube rotary dryer karena sejumlah alasan utama. Pertama, penggunaan oil engine sebagai material penghantar panas tidak membutuhkan tekanan tinggi seperti pada steam tube rotary dryer sehingga komposisi desain yang tidak serumit steam tube rotary dryer. Penelitian ini dilakukan untuk mengetahui perancangan dan analisis kekuatan struktur mesin oil tube rotary dryer yang dilakukan melalui software Solidworks. Cara kerja mesin dimulai dari pemanasan thermal oil di unit pemanas hingga mencapai suhu operasi yang diinginkan. Oil panas kemudian disirkulasikan secara tertutup ke dalam tube di dalam drum pengering. Pada saat yang sama, RDF dengan kadar air awal 55% dimasukkan melalui inlet housing ke dalam shell. Suhu yang bekerja pada oil untuk memanaskan sekitar 150°C, jumlah total tube 65 buah berdiameter 1,25 inch, dan panjang pipa 10 m yang tersusun di dalam shell. Hasil analisis struktur mesin oil tube rotary dryer berdasarkan simulasi didapatkan stress (von mises) dengan nilai tertinggi 9,371 × 108 N/m^2. Sedangkan nilai terendah 9,628 × 103 N/m^2. Nilai tertinggi dari hasil simulasi tersebut terjadi pada sudut tajam bagian support roller yang tidak terdapat kontak, sehingga hal ini dapat diabaikan karena merupakan stress singularity. Hasil simulasi displacement  dengan  nilai tertinggi 1,026 × 101 N/m^2. Sedangkan nilai terendah 1,000 × 10-30 N/m^2. Nilai tertinggi dari hasil simulasi tersebut merupakan penerapan dari gaya centrifugal yang terjadi pada drum/shell rotary. Hasil simulasi Safety factor yaitu mengacu pada rata-rata probe result adalah 2,3. Sehingga dari hasil simula

Luthfiah Luthfiah; Tasir Tasir; Rahmawati Saleh

Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam 2025 Pusat riset dan Inovasi Nasional

The growing demand for natural, sustainable personal care products has driven interest in perfumes formulated with plant-based essential oils and natural fixatives. This study aims to develop and evaluate base-note perfumes using essential oils extracted from three Indonesian aromatic leaves—lemongrass (Cymbopogon citratus), basil (Ocimum basilicum), and kaffir lime (Citrus hystrix)—combined with jasmine (Jasminum sambac) oil as a fixative. Essential oils were extracted by hydrodistillation, and three formulations were prepared, each containing a 30:70 blend of essential oil to ethanol. The perfumes underwent organoleptic testing by 15 trained panelists, along with evaluations of fragrance longevity (over 12 hours) and stain effects on paper substrates. Among the formulations, the blend of kaffir lime and jasmine (Formula 2) exhibited the highest average scores across sensory parameters, including fragrance intensity and freshness. It also retained a perceptible aroma for more than 12 hours and showed minimal staining. The results indicate that natural perfumes made with local essential oils and jasmine fixatives can meet consumer expectations for quality and performance. This study highlights the potential of Indonesian aromatic plants in sustainable perfumery and suggests avenues for future innovation in natural fragrance design.

Sutria Tomagola; Retno Dewi Prisusanti

VitaMedica : Jurnal Rumpun Kesehatan Umum 2025 STIKES Columbia Asia Medan

Emesis gravidarum, or nausea and vomiting during early pregnancy, is a common condition affecting the health and comfort of first-trimester pregnant women. Persistent symptoms can lead to dehydration, electrolyte imbalance, reduced nutrient intake, and psychological distress, potentially affecting both maternal and fetal health. Although pharmacological treatments are available, many pregnant women prefer non-pharmacological approaches due to concerns about fetal safety. Aromatherapy, using essential oils such as lemon, peppermint, and lavender, has emerged as a complementary therapy that may reduce nausea and vomiting through olfactory stimulation and autonomic nervous system modulation. This study aimed to examine the effect of aromatherapy on reducing emesis gravidarum in first-trimester pregnant women at Puskesmas Pagatan. A quasi-experimental design with pretest-posttest control group was conducted, involving 40 participants divided into an intervention group (n=20) and a control group (n=20) using purposive sampling. The intervention group received lemon essential oil inhalation twice daily for seven consecutive days, while the control group continued standard antenatal care. Data were collected using the Visual Analog Scale (VAS) for nausea severity and a structured diary for vomiting frequency. Results showed that the intervention group experienced a significant reduction in nausea severity (pretest mean 6.8 ± 1.2, posttest mean 3.2 ± 1.0, p < 0.001) and vomiting frequency (pretest mean 5.2 ± 1.0, posttest mean 2.1 ± 0.9, p < 0.001). In contrast, the control group showed minimal, non-significant changes. These findings indicate that aromatherapy is an effective, safe, and culturally acceptable non-pharmacological intervention for managing emesis gravidarum. The study concludes that integrating aromatherapy into routine antenatal care can improve maternal comfort, adherence to nutritional intake, and overall well-being in first-trimester pregnancies, supporting holistic prenatal care practices.

Ade Ismail Firzatulloh; Tarman Tarman; Afif Fawa Idul Fata

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

This study analyzes failures in the bending machine at PT. XYZ and determines maintenance priorities to reduce downtime and improve production efficiency. The company often faces repeated breakdowns, especially in hydraulic and control components, which negatively impact productivity. To address these issues, the research applies Failure Mode and Effect Analysis (FMEA) and Fault Tree Analysis (FTA). The study employs a descriptive qualitative approach using downtime and repair data from September 2024 to February 2025. FMEA was conducted to identify failure modes, effects, and causes, and to calculate the Risk Priority Number (RPN) as a basis for prioritization. FTA was then applied to trace root causes by mapping logical relationships among contributing factors leading to the top event. Recommendations were formulated with the 5W+1H method to propose preventive maintenance actions. The results indicate that the hydraulic valve is the most critical component, with an RPN value of 504 due to oil contamination. The main causes include damaged filters, improper oil usage, and lack of a cooling system. The hydraulic cylinder seal and back gauge were also found to contribute significantly to machine failures. FTA analysis revealed root causes such as inadequate maintenance procedures, unsuitable materials, and insufficient inspections. The proposed improvements involve regular replacement of oil filters, structured lubrication schedules, installation of oil coolers, and technician training to strengthen compliance with standard procedures. Overall, the integration of FMEA and FTA provides a systematic approach to identify critical components and root causes, enabling PT. XYZ to implement preventive strategies that minimize failures, reduce downtime, and improve bending machine performance sustainably.

Sya’bana, Daffa Athif; Pratomo, Sunu Arsy; Guritno, Suryo; Roehman, Fatchur

Jurnal Universal Technic (UNITECH) 2025 Fakultas Teknik Universitas Maritim AMNI Semarang

Oil spills in port waters are one of the serious threats to the marine environment and port operations. This study aims to simulate the level of preparedness of oil spill response equipment available at the Oil Base Jetty of PT Pertamina Port Panjang Lampung. Simulations were conducted based on three scenarios, namely a medium-scale spill at Jetty 1 (10,000 liters), a large spill at Jetty 2 (50,000 liters), and a combined maximum spill (60,000 liters). Evaluation was conducted on three main types of equipment: oil boom, skimmer, and dispersant, by considering their effectiveness and adequacy based on the Minister of Transportation Regulation No. PM 58 Year 2013 and guidelines from the International Maritime Organization (IMO). The simulation results show that the oil boom has high effectiveness in all scenarios, demonstrating maximum readiness in the initial containment of the spill. However, the effectiveness of skimmer and dispersant is still low, especially in large-scale scenarios, so they are not able to handle the spill volume optimally. From these results, it can be concluded that although the containment aspect is adequate, there is still a need for improvement in spill recovery facilities, both in terms of the number of units and equipment capacity. This research is expected to be a reference in planning the strengthening of the oil spill emergency response system in the port area.

Benita Apta Nadia; Taat Kuspriyanto; Yunidyawati Azlina

Jurnal Manajemen Bisnis Era Digital 2025 Asosiasi Riset Ilmu Manajemen Kewirausahaan dan Bisnis Indonesia

Employee performance is one of the most important factors that determine the achievement of company goals. In the modern world of work, workload and work environment are two factors that are most often considered in influencing employee performance. As a company engaged in the service sector. As a company engaged in the field of supporting services for the oil and gas industry, PT Supraco Indonesia requires high-performing employees to provide the best service to its clients. This study aims to determine how much influence motivation and service levels have on customer satisfaction in participating in computer training. The research method used is a quantitative approach with data collection techniques using random sampling or purposive sampling, where the entire population of 56 respondents was used as a sample. The data collection instrument used a questionnaire with a Likert scale. Data analysis was carried out using SPSS 27 software with multiple linear regression techniques. The results of the study show that the company size variable in particular, Workload (X1) has a significant effect on Employee Performance with a significant t-value on the level of work environment (X2) also has a significant effect with a significant t-value simultaneously, both have a significant effect on employee performance with a calculated F-value. Meanwhile, the coefficient of determination value shows that the influence of workload and work environment on employee performance is significant.

Fattah, Nurlaeli; Rahmawati Saleh; Ernawati Jassin; Imran Muhtar

Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam 2025 Pusat riset dan Inovasi Nasional

The use of fish oil as a natural source of omega-3 fatty acids, particularly EPA and DHA, often encounters challenges such as oxidative instability, unpleasant fishy odor, and variations in composition. This research focused on producing omega-3–enriched milkfish (Chanos chanos) oil that meets quality standards for microencapsulation, applying the wet rendering method followed by alkali neutralization with NaOH. The process involved varying temperatures of 70, 80, 90, and 100 °C and heating times of 30, 40, and 60 minutes. The crude oil obtained was refined using different NaOH concentrations, then evaluated for oxidative parameters including peroxide value (PV), p-anisidine value (p-AV), total oxidation value (TOTOX), and acidity levels (acid value/free fatty acids, FFA), all compared with International Fish Oil Standards (IFOS). The maximum yield recorded was 0.29% at 100 °C for 60 minutes. The results showed that PV and p-AV values were still within acceptable IFOS limits (3.44 meq/kg and 11.75 meq/kg), and TOTOX values remained below 20, indicating good oxidative stability. However, prolonged heating led to increased acid values/FFA ranging from 2.43% to 2.68%, surpassing IFOS limits and reflecting hydrolytic degradation of the oil. These findings demonstrate the trade-off between achieving higher yields under higher temperature and longer heating versus maintaining oil quality. Therefore, optimal processing at a maximum of 100 °C and not exceeding 30 minutes, combined with alkali neutralization, is recommended to ensure the production of stable, high-quality milkfish oil suitable for encapsulation and incorporation into health-oriented functional foods.

Wulandari, Dhesi Kusuma; M. Fikri Akbar; Sandy Allifiansyah

Jurnal Ilmu Komunikasi, Administrasi Publik dan Kebijakan Negara 2025 Asosiasi Peneliti Dan Pengajar Ilmu Sosial Indonesia

This study explores the practice of participatory communication and creative production implemented by the Anggrek Waste Bank along the Ciliwung River as an educational strategy for flood disaster mitigation. The research aims to understand how community-based waste management initiatives can serve as platforms for environmental learning and social empowerment. Using a qualitative approach with a case study method, this study investigates social dynamics, interaction patterns, and meanings constructed by residents through collaborative waste management and creative production activities. Data were collected through observation, in-depth interviews, and documentation. The findings reveal that participatory communication is manifested not only in formal education, counseling, or campaigns, but also in everyday interactions, creative workshops, and collective community work. Creative products such as recycled crafts, soap made from used cooking oil, and eco enzymes function as symbolic communication media that persuasively convey ecological messages while providing tangible economic benefits. These practices foster a sense of ecological responsibility, strengthen social solidarity, and enhance community resilience to flooding. This study concludes that participatory communication integrated with creative production serves as an effective model for promoting sustainable behavior and community-based flood mitigation in urban environments.

Tri Marini; Betty Mangkuji; Ardiana Batubara; Jujuren Br Sitepu; Tengku Sri Wahyuni +1 more

Jurnal Pengabdian Masyarakat Nian Tana 2025 Fakultas Ekonomi & Bisnis, Universitas Nusa Nipa

Pregnancy is a natural process that occurs from conception to the growth of the fetus in the womb. Lemon aromatherapy is an alternative method to reduce nausea and vomiting. When essential oils are inhaled, volatile molecules will carry the aromatic elements contained in the oil to the tip of the nose. The aim is to determine the effect of lemon aromatherapy on the frequency of reducing nausea and vomiting in pregnant women in the first trimester at the Biru-Biru Community Health Center. This study used the Quasy Experiment method with a One Group Pretest Posttest Design by conducting a Pretest before giving treatment and a Posttest after giving treatment. The population of this study were pregnant women who experienced nausea and vomiting in pregnant women in the first trimester at the Biru-Biru Community Health Center. Sampling was carried out using a total sampling technique, resulting in 30 pregnant women experiencing nausea and vomiting. The results obtained from the study, respondents who did not experience nausea and vomiting after being given lemon aromatherapy were 14 people, 11 people experienced mild nausea and vomiting, and 5 people experienced moderate nausea and vomiting. The analysis used in this study was the Wilcoxon test, which obtained a value (p = 0.000 < 0.05) and there was an effect of lemon aromatherapy on the frequency of reducing nausea and vomiting in pregnant women at the Biru-Biru Community Health Center.

Fitra Abu Rizal; Azam Muzakhim Imammuddin

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

Air pollution and oil reserves are two major issues in the technological development of the automotive industry. Air pollution is caused by gases from burning fossil fuel vehicles. In 2018-2019 Indonesia experienced a drastic decrease in petroleum resources by 49.8%. To overcome this problem, many researchers have conducted research on electric vehicles, including electric bicycles. This study aims to determine the effect of distance and load on BLDC motor power consumption on a prototype e-bomber electric bicycle designed for all terrains such as rocky, sandy, and muddy, and has a large battery capacity, low power consumption, and an electric motor with good speed and torque. This research uses a pseudo-experimental method with a quantitative approach. Tests were carried out on e-bomber electric bicycles with distances of 3 km, 5 km, and 8 km and loads of 60 kg, 70 kg, and 80 kg with a speed of 25 km / h. The results showed that there was an influence of distance and load on the e-bomber electric bicycle. The results showed that there was an effect of distance and load on BLDC motor power consumption with the results of graph analysis and two-way ANOVA tests conducted and the lowest average power consumption of 500 watts at a distance of 3 km and a load of 60 kg, while the highest average power consumption was 522.5 watts at a distance of 8 km and a load of 80 kg.

Hisyam Syaifulloh; Khambali Khambali; Santoso Santoso; Eko Yudiyanto

Jurnal Kendali Teknik dan Sains 2025 International Forum of Researchers and Lecturers

This study aims to analyze the effect of the combination of oil viscosity and shock load on the compression characteristics of telescopic shock absorbers on motorcycles, which include depth, time, and compression speed parameters. The experiment was carried out using two levels of oil viscosity, namely 10 cSt and 15 cSt (equivalent to SAE 10W and SAE 15W), as well as two shock load variations, namely 40 kg and 50 kg, which were dropped vertically from a height of 30 cm. Compression depth measurements were carried out using a slow-motion camera at a speed of 240 fps and the results were validated using Kinovea software. Meanwhile, the compression time measurement is carried out with a stopwatch, and the compression speed is calculated from the results of the comparison between the compression depth and the compression time. The experimental data were analyzed using Minitab software with the Two-Way ANOVA method to determine the influence of each variable on response. The results of the analysis showed that oil viscosity and shock load had a significant influence on the compression depth, while the viscosity of the oil also significantly affected the compression speed. However, neither the viscosity of the oil nor the shock load exerted a significant influence on the compression time. To support the results of the experiment, a mass-spring-damper system theory model approach was used, which represents the dynamic behavior of shock absorbers. This model helps to explain the compression response to changes in fluid and load parameters theoretically. Based on the analysis of experimental results and model simulations, the optimal combination that provides the best performance is found in the use of oil viscosity of 10 cSt (SAE 10W) with a shock load of 50 kg.

Hanna Febriyani; Taat Kuspriyono

Jurnal Ekonomi dan Keuangan 2025 Asosiasi Riset Ekonomi dan Akuntansi Indonesia

The progressive dynamics of the Indonesia Stock Exchange (IDX) encourage accurate and optimized financial statement audits. Every listed company is required to prepare financial statements in accordance with accounting standards and have them verified by independent auditors registered with the capital market authority. Auditing for publicly listed companies demands high responsibility, motivating firms to improve professional standards, including maintaining timeliness in audit reporting. One of the sectors under focus is the oil, gas, and coal subsector, where some companies experience delays in financial reporting, known as audit delay. Factors influencing these delays include firm size and solvency. This study aims to analyze the effect of firm size and solvency on audit delay in companies within the oil, gas, and coal subsector listed on the IDX from 2021 to 2024. The study sample consists of 13 companies meeting the research criteria during this period. Purposive sampling was employed, and data were analyzed using classical assumption tests and multiple linear regression with SPSS version 27. Results indicate that firm size has a significant negative effect on audit delay, while solvency does not have a significant partial effect. Simultaneously, firm size and solvency significantly influence audit delay, suggesting that both variables collectively affect the timeliness of financial statement submission.