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Vehicles Speed in Platoon, Case Study Padang - Bukittinggi Road Ramayanti, Sri; Adji, Bayu Martanto; yosritzal, yosritzal; Gunawan, Hendra
Jurnal Rekayasa Sipil (JRS-Unand) Vol. 17 No. 1 (2021)
Publisher : Civil Engineering Departement, Andalas University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrs.17.1.97-107.2021

Abstract

The increase in vehicle ownership number will affect the increase in traffic flow, which will usually result in congestion on the road network. This phenomenon causes vehicles to tend to travel close to one another (platoon). Characteristics used in describing the platoon phenomenon are the distance between vehicles (headway), average speed, and the number of vehicles in the platoon. This study is to analyzes the effect of variations in the leader and platoon length on vehicle speed. This research was conducted on Padang – Bukittinggi Road. Based on the Decree of the Minister of PUPR No: 248/KPTS/M/2015, Padang - Bukittinggi Road is categorized as a primary arterial road. This research used the primary data, a field survey, by recording vehicle traffic flow (traffic platoon) for two days. A distance of 50 meters is taken to determine the speed, and the time is measured with a stop program. The average headway on weekdays is 1.32 seconds and on holidays is 1.47 seconds. The size of the platoon and the type of platoon leader have a significant effect on the average speed of the vehicle in the platoon if the headway is  ≤ 2 seconds. At the addition of one vehicle in the platoon, which can change the vehicle's average speed, follows the equation y = -4.30x + 67.09.
Preliminary Power Budget Analysis for Equatorial Low Earth Orbit (LEO) Communication Satellite Suryanti, Desti Ika; Ramayanti, Sri; Mukhayadi, Mohammad
Indonesian Journal of Aerospace Vol. 19 No. 1 (2021)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2021.v19.a3479

Abstract

Satellite Technology Center – LAPAN would develop a constellation of 9 communication satellites in a low equatorial orbit. These satellites would perform as data collection platforms for many sensors that spread across the Indonesian territory. The data from the sensors will be downlink to Indonesia’s ground stations in real-time. This research aims to analyze the power budget of those satellites to decide how many solar panels and batteries are required to perform their mission. The method in this research began by calculating the power requirements of each mission per orbit period to estimate power consumption and calculate the power generated by the solar panels. The results of these calculations will be implemented to the power system design to find the satellite solar cells/ panels arrangement and battery capacity allocation. To minimize the development time and cost, the solar array design in this study considers the utilization of previous solar panel design of LAPAN-A series satellites as a design constraint. This study shows the configuration of 3 body-mounted solar panels and 2 deployable solar panels could support the mission operation of communication satellite in the low equatorial orbit. For energy storage, these satellites should be equipped with 28 V Li-ion in the 8Sx3P configuration.
Flatwise Testing Modeling Study On Aluminium Honeycomb Panel Ramayanti, Sri
Indonesian Journal of Aerospace Vol. 20 No. 2 (2022): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2022.v20.a3937

Abstract

Honeycomb sandwich structures are widely used in space applications due to their exceptional performance. Extensive research has been conducted on the response of honeycomb structures to various external loads. The out-of-plane strength, including compression and tensile properties, is a critical aspect of honeycomb structures. Despite some experimental and numerical studies, research specifically addressing the tensile direction, such as flatwise tensile testing in honeycombs, remains limited. This testing focuses on the bond strength between the face sheets and the honeycomb core, as well as the tensile strength of the core itself. Utilizing finite element analysis (FEA) has proven effective for characterizing honeycomb structures under various load conditions. However, the complex geometry of the core requires an enormous number of elements, increasing computation times. Thus, simplifying the model by replacing the hexagonal geometry with a homogenized solid layer with effective material properties is necessary. This study focuses on flatwise tensile testing of aluminum honeycomb using different modeling approaches: discrete, continuum, and equivalent plate models. The discrete model serves as the reference due to its detailed structural representation. The continuum-Gibson model, while reasonably accurate in stress estimation, tends to overestimate displacement. Both equivalent models, Hoff and Reissner, significantly overestimate displacement, with Hoff underestimating stress and Reissner overestimating it. In contrast, equivalent models offer insights, but their accuracy varies, necessitating further calibration for precise predictions. Future research should validate these simulation results with real tests.
Dominasi Clan Culture dan Individualized Consideration dalam Membentuk Organizational Citizenship Behaviour: Studi Mediasi di Rumah Sakit Daerah Rudyanto Rudyanto; Rokiah Kusumapradja; Nofierni Nofierni
Jurnal Ilmu Manajemen Terapan Vol. 7 No. 5 (2026): Jurnal Ilmu Manajemen Terapan (Mei - Juni 2026)
Publisher : Dinasti Review Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/jimt.v7i5.8472

Abstract

Di tengah keterbatasan sumber daya, operasional Rumah Sakit Umum Daerah (RSUD) sangat bergantung pada perilaku ekstra peran atau Organizational Citizenship Behavior (OCB) tenaga medis. Penelitian ini bertujuan untuk menganalisis pengaruh Clan Culture dan Individualized Consideration terhadap OCB tenaga keperawatan, serta menguji peran Affective Commitment sebagai variabel mediasi, dengan menyoroti dinamika Clan Culture sebagai pedang bermata dua. Penelitian kuantitatif ini menggunakan desain kausalitas dengan teknik pengambilan sampel jenuh (census) yang melibatkan 115 perawat dan bidan di RSUD Kabupaten Melawi, di mana data dianalisis menggunakan Structural Equation Modeling - Partial Least Squares (SEM-PLS) dengan bantuan perangkat lunak SmartPLS 4. Hasil analisis menunjukkan bahwa Clan Culture berpengaruh positif dan menjadi prediktor paling dominan terhadap OCB, diikuti oleh Individualized Consideration, namun Affective Commitment terbukti tidak berpengaruh signifikan terhadap OCB dan gagal berperan sebagai mediator. Temuan ini menyimpulkan bahwa budaya klan efektif membangun kohesivitas tim (organizational glue) tetapi berisiko menciptakan zona nyaman yang kurang inovatif jika terlalu mendominasi, sehingga manajemen disarankan untuk mempertahankan kehangatan budaya tersebut namun mengarahkannya pada standar profesionalisme medis melalui kepemimpinan yang memberdayakan.
Leadership Commitment, Open Organizational Culture, and Learning Organization Among Nurses: Happiness at Work as a Mediator Evi Maris Sahara; Rian Adi Pamungkas; Rokiah Kusumapradja
International Journal of Nursing and Health Services (IJNHS) Vol. 9 No. 3 (2026): International Journal of Nursing and Health Services (IJHNS)
Publisher : Alta Dharma Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35654/ijnhs.v9i3.921

Abstract

Background: Hospital nurses must continuously adapt to changes in healthcare technology, patient-safety standards, and service-quality expectations. A learning organization is therefore essential, yet the psychological mechanism that links leadership commitment and open organizational culture with organizational learning among hospital nurses remains insufficiently explained. Objective: This study analyzed the associations of perceived leadership commitment and open organizational culture with learning organization, with happiness at work as a mediating variable among nurses at An-Nisa Hospital, Tangerang. Method: An explanatory cross-sectional study was conducted among 225 staff nurses selected using purposive sampling. Data were collected using a validated 45-item questionnaire with a four-point Likert scale. Instrument validity, reliability, descriptive statistics, and structural model testing were analyzed using SPSS 25 and SmartPLS 3. Direct and indirect effects were evaluated using Structural Equation Modeling-Partial Least Squares. Result: Perceived leadership commitment and open organizational culture explained 54.8% of the variance in happiness at work. The final model explained 69.3% of the variance in learning organization and demonstrated acceptable model fit (SRMR = 0.055). Happiness at work had the strongest association with learning organization (? = 0.574, p < 0.001), followed by open organizational culture (? = 0.251, p = 0.004) and perceived leadership commitment (? = 0.104, p = 0.048). Happiness at work partially mediated the association of perceived leadership commitment (? = 0.127, p < 0.001) and open organizational culture (? = 0.351, p < 0.001) with learning organization. Conclusion: Nurses’ happiness at work is a central psychological pathway through which leadership commitment and open organizational culture are translated into organizational learning. Recommendation: Hospital managers should strengthen fair leadership practices, transparent communication, shared organizational values, and nurse well-being programs to support clinical learning. Further longitudinal and multi-site studies are recommended to confirm temporal relationships and improve generalizability.
System Quality, Service Quality, and Electronic Medical Record Adoption: User Satisfaction as Mediator in Regional Hospital Outpatient Care Synthia Sari Toha; Rokiah Kusumapradja; Rian Adi Pamungkas
International Journal of Nursing and Health Services (IJNHS) Vol. 9 No. 3 (2026): International Journal of Nursing and Health Services (IJHNS)
Publisher : Alta Dharma Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35654/ijnhs.v9i3.930

Abstract

Background: Electronic medical record (EMR) adoption is essential for improving documentation accuracy, information accessibility, service efficiency, and patient safety. In outpatient care, EMR adoption is particularly important because healthcare professionals work in a high-volume and time-sensitive service environment. Objective: This study aimed to examine the effects of system quality and service quality on EMR adoption, with user satisfaction as a mediating variable, among healthcare professionals in a regional hospital outpatient department. Method: A quantitative cross-sectional analytical study was conducted among 97 Care Provider Professionals in the outpatient department of Dr. Dradjat Prawiranegara Regional Hospital, Serang. Respondents were selected using purposive sampling. Data were collected using a structured questionnaire and analyzed using Structural Equation Modeling-Partial Least Squares (SEM-PLS). Result: User satisfaction had a positive and significant effect on EMR adoption (? = 0.600; t = 4.075; p < 0.001). System quality significantly influenced user satisfaction (? = 0.202; t = 2.805; p = 0.005) and EMR adoption (? = 0.506; t = 5.573; p < 0.001). Service quality significantly influenced user satisfaction (? = 0.770; t = 12.540; p < 0.001), but its direct effect on EMR adoption was not significant (? = -0.164; t = 0.966; p = 0.334). The model explained 83.3% of the variance in user satisfaction and 78.4% of the variance in EMR adoption. Conclusion: EMR adoption in outpatient care is primarily influenced by system quality and user satisfaction. Service quality contributes to EMR adoption indirectly by improving user satisfaction rather than through a direct pathway. Recommendation: Hospitals should strengthen EMR system reliability, responsive technical support, user-centered training, and routine user satisfaction monitoring to sustain EMR adoption.
Development of a Handover Model in Medical Services to Improve Service Quality at Hospital X Cikarang Listia Evalina; Rokiah Kusumapradja; Tjipto Rini; Aytan Azizli
Green Inflation: International Journal of Management and Strategic Business Leadership Vol. 2 No. 4 (2025): November : Green Inflation: International Journal of Management and Strategic B
Publisher : Asosiasi Riset Ilmu Manajemen Kewirausahaan dan Bisnis Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/greeninflation.v2i4.630

Abstract

This study investigates the clinical handover process as a critical component of patient safety and healthcare service quality in hospital settings. Inconsistent communication, incomplete documentation, and the absence of standardized procedures were identified as major problems contributing to communication failures and potential adverse events. The objective of this research was to develop and test a structured and effective handover model that could improve communication accuracy and documentation reliability among healthcare professionals. A mixed methods design was employed, consisting of a qualitative phase (in-depth interviews, observations, and document analysis) to explore real-world handover practices, followed by a quantitative phase using a pretest–posttest design to evaluate the effectiveness of the proposed model. The study proposes an integrated handover model based on SBAR-IM (Situation, Background, Assessment, Recommendation, Intervention, Monitoring) strengthened by Quality Control (QC) and Mutual Confirmation (MC) mechanisms. The findings demonstrate a significant improvement in handover quality after implementation, with communication scores increasing from 74 to 84.5 and documentation scores improving from 48.3 to 63.0 (p < 0.05). Qualitative results further revealed reduced communication errors, improved clarity of clinical information, and enhanced interprofessional collaboration. This study concludes that the proposed SBAR-IM–based QC–MC model is effective, practical, and suitable for improving patient safety and healthcare service quality in hospital environments.
A Strategic Social Media Approach to Enhance Brand Recognition in A University Dental Hospital Hanifah Salma Rosa; Endang Ruswanti; Rokiah Kusumapradja
International Journal of Nursing and Health Services (IJNHS) Vol. 9 No. 1 (2026): International Journal of Nursing and Health Services (IJHNS)
Publisher : Alta Dharma Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35654/ijnhs.v9i1.904

Abstract

Background: The brand awareness level of the Dental and Oral Teaching Hospital (RSGM-P) at University X remains low, as indicated by the predominance of patients referred by student initiatives (90%) and limited walk-in visits (10%). This may result from the underutilization of social media, low customer engagement, and insufficient electronic word of mouth (eWOM). Objective: This study aims to analyze the effects of social media activities and customer engagement on brand awareness, with eWOM as a mediating variable. Method: A quantitative approach with a cross-sectional design was employed, involving 205 non-student Instagram followers of RSGM-P. Data were analyzed using Structural Equation Modeling (SEM) via LISREL. Results: The findings reveal that social media activity and eWOM significantly influence brand awareness, while customer engagement has no direct effect. However, customer engagement positively influences eWOM, which in turn mediates its effect on brand awareness. Managerial implications emphasize the need for enhanced content strategies, influencer collaboration, and online reputation management. Recommendation: It is recommended that RSGM-P optimize SEO-friendly educational content, strengthen user interactions, and encourage patient reviews as part of brand trust-building efforts. Recomendation: This study contributes to the strategic understanding of digital media utilization in marketing for university-based hospitals