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Penerapan Ais Transponder untuk Keselamatan Kapal Nelayan Supria, Supria; Romadhoni; Isna Yulia; Marzuarman; M Afridon; Hardiyanto
ABEC Indonesia Vol. 11 (2023): 11th Applied Business and Engineering Conference
Publisher : Politeknik Negeri Bengkalis

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Fishermen in the Bengkalis Strait are one of the livelihoods of the Bengkalis residents. Many fishermen who go on cruises do not apply traffic rules in the waters so that accidents often occur in the waters. In this study, it is proposed to apply AIS Transponder for monitoring the security and safety of ships around Bengkalis waters. The developed AIS Transponder is capable of sending and receiving AIS data installed on ships. From the results of the trials that have been carried out, it shows that the AIS transponder can transmit AIS data to the Polbeng AIS receiver and can track nearby ships that have AIS devices.
Diabetes Mellitus and Hypertension are Associated with Bell's Palsy Romadhoni; Herianti, Silva Optalmi; Yekti, Murwani; Khamsiyati, Siti Istiqomah
Magna Neurologica Vol. 2 No. 1 (2024): January
Publisher : Department of Neurology Faculty of Medicine Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/magnaneurologica.v2i1.908

Abstract

Background: Bell's palsy occurs in approximately 40-70% of all cases of acute peripheral facial nerve paralysis, and its cause is unknown. Bell's palsy has several risk factors, including diabetes mellitus and hypertension. Objective: This study aims to identify the association between diabetes mellitus and hypertension with the occurrence of Bell's palsy. Methods: This research was conducted at RSUD Tugurejo Semarang in March 2022 using a retrospective study design and purposive sampling technique. Data collected included the history of diabetes mellitus, hypertension, and the occurrence of Bell's palsy. Medical records were used as research instruments. Hypothesis testing was performed using the Fischer exact test. Results: A total of 32 samples were included in this study. There were 11 patients (34.4%) with a history of diabetes mellitus, 21 patients (65.6%) with a history of hypertension, 11 patients experienced acute Bell's palsy (34.4%), and 21 patients had subacute Bell's palsy (65.6%). The statistical analysis showed a significant association between diabetes mellitus (p=0.017) and hypertension (p=0.033) with the occurrence of Bell's palsy. Conclusion: This study reveals a significant correlation between diabetes mellitus and hypertension and the occurrence of Bell's palsy. Several studies also suggest that hypertension is linked to a poorer prognosis in patients with comorbidities and facial paralysis in Bell's palsy. However, there are also studies stating that age and gender are associated with the occurrence of Bell's palsy independently of diabetes and hypertension.
Studi Kasus Faktor-Faktor Yang Mempengaruhi Minat Berwirausaha Pada Siswa Kelas XII Tata Boga 2 Di SMK Negeri 6 Surabaya Fadiyah Qiyamulail Abidah; Lucia Tri Pangesthi; Sri Handajani; Romadhoni
Populer: Jurnal Penelitian Mahasiswa Vol. 2 No. 2 (2023): Juni : Jurnal Penelitian Mahasiswa
Publisher : Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/populer.v2i2.861

Abstract

The report on the career paths of alums from Public Vocational High School 6 Surabaya between 2019 and 2022 shows that alums pursuing careers as entrepreneurs are lower than those becoming employees. This study aims to determine the intrinsic and extrinsic factors and their simultaneous influence on the interest in entrepreneurship of 12th-grade students in the Culinary 2 class at Public Vocational High School 6 Surabaya. The research used a descriptive method with a quantitative approach and examined the impact of intrinsic and extrinsic factors, both individually and simultaneously, on student's entrepreneurial interests. The population of this study consisted of 30 students in the 12th-grade Culinary 2 class at Public Vocational High School 6 Surabaya. The data was collected using a validated questionnaire comprising 30 items. Meanwhile, the data analysis technique used was multiple linear regression. The results indicated that intrinsic factors did not influence student's interest in entrepreneurship. Contrarily, the extrinsic factors did have an influence. Furthermore, intrinsic and extrinsic factors simultaneously influence student's interest in entrepreneurship. Therefore, students at Public Vocational High School 6 Surabaya tend to be interested in entrepreneurship due to the encouragement they receive from their environment, including their family, community, and school. Moreover, the student's willingness and interest also played a supporting role. Thus, student's interest in pursuing careers as entrepreneurs can evolve if there is support from all parties.
Digital-Based Learning Innovation of Health Psychology and Physical Activity to Promote Healthy Lifestyles among High School Students Hamdani, Ainun; Romadhoni
JINEA: Journal of Innovation in Education and Learning Vol. 1 No. 1 (2025): FEBRUARY 2025
Publisher : Ihsan Cahaya Pustaka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.66031/jinea.v1i1.7

Abstract

This study develops and evaluates a digital-based learning innovation integrating health psychology and physical activity to promote healthy lifestyles among high school students. Despite the proven benefits of exercise in enhancing physical and psychological health, many adolescents neglect regular physical activity due to busy schedules and lack of motivation. The innovation combines psychological theories with interactive digital modules to increase students’ awareness and engagement in daily exercise. Using a mixed-methods approach, the module was implemented in selected schools and assessed through pre- and post-tests, questionnaires, focus groups, and interviews. Findings reveal significant improvements in students’ knowledge of health psychology, motivation for physical activity, and adoption of healthier habits. The novelty of this study lies in leveraging digital media to bridge theory and practice, providing an accessible and engaging platform for health education. This research offers valuable insights for educators and policymakers aiming to enhance adolescent well-being through innovative, technology-driven learning strategies.
SENSITIVITY ANALYSIS OF HYDROSTATIC PARAMETERS WITH RESPECT TO DISPLACEMENT CHANGES ON THE MINI BORNEO BARGE Romadhoni; Budhi Santoso; IKAP Utama
Journal of Marine-Earth Science and Technology Vol. 6 No. 1 (2025): April
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v6i1.8783

Abstract

This study presents a systematic sensitivity analysis of key hydrostatic parameters keel to buoyancy distance (KB), metacentric radius (BM), and metacentric height (GM) with respect to incremental changes in displacement for the Mini Borneo barge. Utilizing only the vessel’s official stability booklet data, natural cubic splines were fitted to the discrete hydrostatic tables to reconstruct continuous functions for each parameter over the displacement range of 256.6t to 1641.0t. First derivative functions were then derived analytically and cross validated via centered finite difference, enabling high‐resolution evaluation of ∂KB/∂Δ, ∂BM/∂Δ, and ∂GM/∂Δ at 0.01 t increments. Results indicate that KB sensitivity peaks at a moderate load of approximately 436.6 t (0.00045 m/t), whereas BM and GM sensitivities reach their maxima at full‐load conditions near 1641.0 t (0.00086 m/t and 0.00092 m/t, respectively). Critical displacement intervals were identified around these peaks, highlighting narrow bands where small weight additions most profoundly affect stability. These findings inform the definition of safe‐loading envelopes and ballast‐management strategies, offering practical thresholds to maintain regulatory stability margins without the need for additional sea trials. The methodology is readily generalizable to other small craft equipped with hydrostatic booklets.
Intelligent Optimization of Fast Boat Hull Form for Resistance Reduction Using CFD and Surrogate-Assisted Algorithms Romadhoni; Budhi Santoso; Muhammad Alimul Hafiz
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 1 (2026): In Progress
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i1

Abstract

High-speed fast boats operating at high Froude numbers experience rapidly increasing resistance due to coupled viscous and wave-making effects. This study proposes a surrogate-assisted hull-form optimization framework that combines Reynolds-averaged Navier-Stokes (RANS) CFD (SST k-ω) with Gaussian Process Regression (Kriging) to minimize the total resistance of a fast monohull while maintaining displacement and geometric feasibility. The hull geometry was parameterized using four variables: deadrise angle, prismatic coefficient, longitudinal centre of buoyancy (LCB), and bow entrance angle. A set of candidate designs was evaluated by CFD, a surrogate model was trained and validated (R² = 0.985, prediction error < 2%), and global optimization was carried out using Genetic Algorithm (GA) and Particle Swarm Optimization (PSO). CFD verification of the best design shows a consistent resistance reduction across Fn = 0–0.75, with a maximum reduction of 14.4% at Fn = 0.65 compared to the baseline hull. The optimized hull exhibits reduced bow pressure peaks and delayed flow separation at the transom. The surrogate-assisted strategy reduces the number of CFD evaluations and lowers the overall computational effort by about 78% while preserving prediction accuracy. R^2=0.992.