cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
M. Yusuf
Contact Email
yusuf@pnb.ac.id
Phone
+62361-701981
Journal Mail Official
logic@pnb.ac.id
Editorial Address
Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali, Jl Kampus Bukit Jimbaran, Badung, Bali, Indonesia
Location
Kab. badung,
Bali
INDONESIA
Logic : Jurnal Rancang Bangun Dan Teknologi
Published by Politeknik Negeri Bali
ISSN : 1412114X     EISSN : 25805649     DOI : https://doi.org/10.31940/logic.v21i3
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Logic : Jurnal Rancang Bangun dan Teknologi is a peer-reviewed research journal published by Unit Publikasi Ilmiah, Pusat Penelitian dan Pengabdian Masyarakat, Politeknik Negeri Bali, aiming at promoting and publishing original high quality research in all disciplines of engineering and applied technology. All research articles submitted to Logic should be original in nature, never previously published in any journal or presented in a conference or undergoing such process across the world. All the submissions will be peer-reviewed by the panel of experts associated with particular field. Submitted papers should meet the internationally accepted criteria and manuscripts should follow the style of the journal for the purpose of both reviewing and editing.
Arjuna Subject : Teknik (semua kategori) - Tenik Industri dan Manufaktur
Articles 132 Documents
 10   11   12   13   14 
RECOMMENDATIONS FOR WORK SYSTEM ASSESSMENT OF SNI 9001: 2008 IMPLEMENTATION BASED ON MACRO ERGONOMICS AT PT SPU Heri Setiawan; Yusuf, Muhammad; Micheline Rinamuti; Dominikus Budiarto; Yohanes Dicka Pratama; Achmad Alfian
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 2 (2025): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i2.126-131

Abstract

The increasingly intense competition, the number of customer choice options and the more selective customers in choosing medical equipment products require PT SPU as one of the Indonesian National Medical Device (Alkes) industry engaged in the production process of medical devices and rehabilitation to always improve a better work system. To improve product quality PT SPU has implemented the SNI ISO 9001: 2008 Quality Management System which contains standard requirements used to measure the organisation's ability to meet customer requirements and appropriate regulations. The purpose of this research is to identify and assess how much influence each component of the work system has on the satisfaction of customers, employees and leaders. The method used is Macro Ergonomics. The magnitude of the contribution of the work assessment process of SNI ISO 9001: 2008 implementation to the influence of significant macro ergonomic aspects on organisational conditions (52.45%), physical environment (37.37%), production processes (12.53%), infrastructure (9.69%), production process services (5.90%), and R&D activities (2.82%).(3) Proposed recommendations for improving organisational conditions by confirming the roles and responsibilities of each person so that there are no undisciplined employees between sections, improving communication. Physical work environment by rearranging the place and rejuvenating production process support tools that are not ergonomic and have been damaged, redesigning a conducive and comfortable work environment. Production process improvements including employees actively communicating with each other and development of standard operating procedures (SOPs) with legacy competencies through knowledge transfer. Improvements to Facilities and Infrastructure by adding air conditioning, such as blower/exhaust ventilators, and sufficient room ventilation. Improvements to R&D: by facilitating employee exchanges for R&D activities, training, technical guidance, and experience exchange; increasing access to cooperation with government and private organisations.
ANALYSIS OF THE EFFECTIVENESS OF WATERWHEELS AS WATER PUMP DRIVERS Pradnyana, Agung; I Made Anom Adiaksa; I Made Agus Putrawan; I Wayan Suma Wibawa; Made Ardikosa satrya Wibawa
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 2 (2025): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i2.132-139

Abstract

A pump is a device used to move liquids from one location to another through a pipeline, typically by increasing fluid pressure using electrical power. This increase in pressure helps overcome various types of flow resistance, such as pressure differences, elevation changes, or frictional losses. Transporting fluids from lowland to highland areas is not a simple task, particularly in remote regions where access to electricity is limited. This research was conducted at Pura Beji, Tanah Lot, Beraban Village, Tabanan Regency—an area that has abundant clean water resources in the lowlands compared to the highlands. The study focuses on the process of transferring clean water using water wheels as mechanical drivers in a system known as PATA Technology (Pompa Air Tenaga Air). Therefore, the objective of this research is to analyze the mechanical power generated by the water wheels and the resulting pumping performance of the water pump. This study investigates the effectiveness of waterwheels as mechanical drivers for water pumps in rural areas with limited electricity access, using the PATA (Pompa Air Tenaga Air) system. According to the research result, it was found that for mass flowrate of water wheel 75.5 kg/s then for the mass flowrate of water pump 14.7 kg/s. The efficiency for the waterwheels against the water pump obtained >40%. The water wheels act as the main drive of the water pump through rotation axle gear mechanism which is transmitted to the housing pump with average power water wheel 650 kg.m/s2
ANALYSIS OF THE IMPACT TEST STRENGTH OF SQUID FIBRE-REINFORCED COMPOSITES Firmansyah, Fiky; Hartono, Moh.
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 2 (2025): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i2.117-125

Abstract

This study aims to determine the effect of volume fraction, fibre angle direction, and fibre length on the impact strength of squid fibre-reinforced composites. Squid fibre is a natural animal fibre that has excellent potential in the development of composite materials. The use of squid fibre as a composite reinforcement can be an alternative to reduce organic waste from marine products and produce new composite materials in sustainable manufacturing applications. The research method was conducted with quantitative experiments to determine the effect of fibre volume fraction with variations of 25%, 50%, and 75%; fibre angle direction with variations of 45° and 90°; and fibre length with variations of 20 mm, 30 mm, and 40 mm. This study used the Factorial DOE statistical data analysis method. The results showed that volume fraction and fibre length significantly affected the impact strength of the composite. The higher the volume fraction and fibre length, the higher the impact strength value of the composite. Meanwhile, the direction of fibre did not show a significant effect. The 75% volume fraction produced the highest impact strength of 0,0738 J/mm², and the 25% volume fraction produced the lowest value of 0,066 J/mm². The 45° fibre direction produced an impact strength value of 0,07098 J/mm², and the 90° fibre direction produced a value of 0,07097 J/mm². The 40 mm fibre length produced the highest impact strength value of 0,078 J/mm², and the 90° fibre direction produced a value of 0,07097 J/mm².
Redesign of Patient Wheelchair Type SM-8018 Based on Ergo-Total Function Deployment (ETFD) Integration Heri Setiawan; Yusuf, Muhammad; Micheline Rinamuti; Dominikus Budiarto; Yohanes Dicka Pratama; Achmad Alfian
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.175-185

Abstract

Manual wheelchairs remain widely used in Indonesian health-care facilities, yet their design often does not fully accommodate local anthropometric characteristics and work patterns. The SM-8018 patient wheelchair used at PT SPU is operated by caregivers, exposing both patients and caregivers to potential ergonomic risks. This study aims to evaluate and redesign the SM-8018 wheelchair using an integrated Ergo-Total Function Deployment (ETFD) and House of Ergonomics (HoE) approach within a Total Ergonomics framework. A pre–post experimental design was applied involving 32 adult users and caregivers with at least six months of experience using or pushing the SM-8018. Data collection included anthropometric measurements, musculoskeletal complaints using the Nordic Body Map (NBM), subjective fatigue using the Japan Association of Industrial Health (JAIH) questionnaire, boredom scores, satisfaction using the Minnesota Satisfaction Questionnaire (MSQ) and voice of customers (VoC). VoC and ergonomic findings were mapped into a HoE matrix to derive priority design specifications through ETFD. Results showed notable mismatches between user anthropometry and key wheelchair dimensions, particularly seat depth and width, backrest and headrest height and angle, and push-handle height, which were associated with high levels of discomfort in the lower back, buttocks, shoulders and upper arms and with considerable fatigue. The ETFD–HoE analysis identified four primary redesign priorities: adjustment of push-handle height, optimisation of backrest and headrest geometry, refinement of seat dimensions and improvement of front-wheel stability. Pre–post comparisons indicated that musculoskeletal complaints and fatigue remained relatively high and in some cases increased, whereas boredom and satisfaction tended to change in a more favourable direction. These findings suggest that the first iteration of the SM-8018 redesign, although guided by Total Ergonomics principles, requires further refinement and system-level support. Nonetheless, the study demonstrates the feasibility of integrating ETFD, HoE and Total Ergonomics to systematically guide the improvement of low-cost hospital wheelchairs in the Indonesian context.
Influence of Workplace Environment and Ergonomic Posture on Musculoskeletal Disorders in Traditional Gamelan Craft Workers in Bali I Ketut Gde, Juli Suarbawa; Yusuf, Muhammad; Suarta, I Made; Pujihadi, I Gede Oka
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.186-193

Abstract

This study investigates the effect of work posture and workplace environmental conditions on musculoskeletal disorders (MSDs) and fatigue among traditional gamelan craftsmen in Bali, Indonesia. Using a pre-experimental one-group pretest–posttest design, fifty-one male workers were assessed using the Nordic Body Map (NBM), the EORTC QLQ-C30 fatigue scale, and the Rapid Upper Limb Assessment (RULA). The results showed a significant increase in MSD scores from 29.72 to 48.90 and fatigue scores from 31.06 to 44.26 after a single four-hour work session (p < 0.001). RULA analysis indicated that 100% of workers performed tasks in moderate- to high-risk postures, with 36.8% requiring immediate ergonomic intervention. The most affected anatomical regions included the lower back, upper back, neck, and thighs. These findings suggest that prolonged static postures, floor-level working positions, and suboptimal workplace environmental conditions substantially contribute to physical strain. The results highlight the urgent need for ergonomic interventions tailored to traditional craft industries to reduce cumulative trauma risks and improve worker well-being.
Thermal Performance Analysis Of TiO₂ and Paraffin as Phase Change Materials Arsawan, I Made; IDG Ary Subagia; I KG Wirawan; DNK Putra Negara; NW Sugiarti
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.194-200

Abstract

Phase change materials (PCMs) are materials that can store and release thermal energy through phase changes from solid to liquid at specific temperatures. This study aims to analyze the effect of TiO₂ concentration in paraffin as a phase change material for thermal energy storage applications. TiO₂ is used as an additive to paraffin to enhance thermal conductivity and accelerate heat transfer, thus improving the performance of the phase change material (PCM). This research investigates the thermal characteristics of the paraffin and TiO₂ mixture by measuring thermal properties such as melting point, heat capacity, thermal stability, and the energy storage capability of the material using techniques such as Differential Scanning Calorimetry (DSC). The results show that the addition of TiO₂ can enhance the thermal performance of pure paraffin as a phase change material. A concentration of 10% TiO₂ can absorb thermal energy up to 94.58 kJ/kg. This study is expected to contribute to the development of more efficient energy storage materials.
Analysis of Tensile Strength in a Combination of Recycled HDPE Plastic and Liquid Asphalt Sofan, Achmad Bryan Baharrudin; Hartono, Moh. Hartono
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.147-155

Abstract

Plastic waste reuse has gained significant attention due to its potential to reduce environmental pollution and provide alternative materials for engineering applications, particularly in the construction sector where durability and maintenance issues are common. One persistent problem in building structures is roof leakage caused by long-term exposure to rainfall, ultraviolet radiation, and extreme temperature changes, which gradually damage conventional waterproofing materials. To improve performance, materials with higher tensile strength and flexibility are needed. High-Density Polyethylene (HDPE), a thermoplastic known for its strength and durability, offers promising reinforcement when combined with liquid asphalt, while also supporting environmentally sustainable practices by reducing plastic waste. In this study, liquid asphalt was heated to 40°C and mixed with HDPE heated at 200°C, 210°C, and 220°C, then stirred for 1.5 hours until homogeneous, cooled to room temperature, and molded according to ASTM D638 for tensile testing. The results show that the 90:10 (HDPE: asphalt) composition at 200°C produced the highest tensile strength of 6.14 MPa, while the 80:20 composition at 220°C showed the lowest value of 3.86 MPa, indicating that higher HDPE content at optimal melting temperatures enhances mechanical properties and provides strong potential for use as a durable, environmentally friendly waterproofing layer in building construction.
Optimization of Pineapple Leaf Fiber-Reinforced ABS Waste Filaments for FDM: Effect of Mesh Size and Volume Fraction Sipahutar, Wahyu; Fikri, Azizul; Baiti, Risa Nurin; Siregar, Mhd Yasin; Putri, Faiza Armalia
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.169-174

Abstract

Acrylonitrile Butadiene Styrene (ABS) plastic waste presents significant potential for upcycling into environmentally friendly materials, particularly as feedstock for 3D printing filaments in Fused Deposition Modeling (FDM). This study investigates the influence of pineapple leaf fiber (PALF) reinforcement at two weight fractions (3% and 5%) and two mesh sizes (200 and 300) on the dimensional stability, printability, and mechanical properties of ABS waste-based composite filaments. Comprehensive evaluations were conducted, including filament diameter consistency, surface morphology, and uniaxial tensile testing. The 5% fiber content with 300-mesh PALF yielded the most stable filament diameter (average 1.73 mm, CV 2%), while the same formulation also achieved the highest ultimate tensile strength (UTS) of 8.873 MPa and elongation at break of 0.197%. Interestingly, the highest Young’s modulus (0.139 GPa) was observed in the 3%–300 mesh variant, although it exhibited more brittle behavior. Overall, the 5%–300 mesh formulation was identified as optimal, striking a favorable balance between tensile strength, flexibility, and dimensional consistency, thereby validating its suitability as a sustainable FDM filament derived from post-consumer ABS waste.
Utilization of Corn Cob Waste as an Alternative Catalyst in Catalytic Converters for Diesel Engine Carbon Emission Reduction Muhamad, Muhajir; Musthofa, Imron; Isworo, Hajar; Putra, Muhammad Rezki Fitri; Wicaksono, Bayu Agung
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.140-146

Abstract

Catalytic converters function to transform harmful exhaust gases into less hazardous substances through catalytic reactions, primarily oxidation and reduction. This study aims to investigate the potential of corncob waste as an alternative catalytic material in catalytic converters for reducing carbon emissions from diesel engines. The methodology involves synthesizing biochar-based catalysts derived from corncobs via pyrolysis, followed by performance evaluation within a catalytic converter system under varying engine speeds: 700 RPM, 900 RPM, and 1100 RPM. Experimental results demonstrate that catalytic efficiency does not increase monotonically with char content; instead, the 70% char formulation achieved the highest smoke opacity reduction, recording 18.90% at 700 RPM and 14.70% at 900 RPM, outperforming both the 50% and 100% variants at 1100 RPM, where exhaust temperature and flow rate increase substantially, the 100% char catalyst showed comparatively greater stability, achieving a reduction of 5.50%, while the 70% formulation declined to 2.90%. These quantitative outcomes confirm that optimal performance arises from a balanced char loading that maximizes reactive surface area while preserving gas–solid interaction efficiency. Corncob biochar thus represents a viable and sustainable alternative to metal-based catalysts. However, the variability in performance across operating conditions and the need for improved thermal durability underscore the importance of further material optimization for commercial diesel applications.
Design of Integrated Distillation-Dehydration Prototype for Bioethanol with Flexible Column and Capillary Condenser Mustofa; Haluti, Siradjuddin; Daud, Ovin
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.156-168

Abstract

The production of high-purity bioethanol remains a challenge, particularly when the feedstock originates from traditional fermentation processes such as cap tikus. This study presents an integrated distillation–dehydration prototype that enables simultaneous vapor separation and moisture removal within a single columnn – an innovation that combines a flexible dual-layer adsorbent chamber and a capillary-type condenser tio improve mass and heat transfer performance. The prototype consists of three main components: a boiler with a diameter and height of 500 mm, a distillation–dehydration column with a diameter of 101.6 mm and a height of 1000 mm designed for flexibility to accommodate various adsorbents, and a shell-and-tube condenser 1200 mm long equipped with 19 capillary tubes of 8 mm diameter. Heat is supplied by a “1000-eye” gas burner that ensures uniform thermal distribution at the boiler base. Preliminary testing with 10.8 L of cap tikus (25% alcohol) produced 94 mL of distillate in 3 hours, with a stable of 5 °C temperature gradient along the column. The resulting distillate reached alcohol 87% purity, demonstrating the capability of the integrated system to enhance dehydration performance. Despite performance limitations caused by heat losses in the boiler and vapor-flow resistance witihn the zeolite-packed column, theprototype shows promising thermal and separation characteristics and is ready for futher optimization to increase distillation rate and energy efficiency.

Page 13 of 14 | Total Record : 132

 10   11   12   13   14 

Filter by Year

2021 2025


Reset
Filter By Issues
All Issue Vol. 25 No. 3 (2025): November Vol. 25 No. 2 (2025): July Vol. 25 No. 1 (2025): March Vol. 24 No. 3 (2024): November Vol. 24 No. 2 (2024): July Vol. 24 No. 1 (2024): March Vol. 23 No. 2 (2023): July Vol. 23 No. 1 (2023): March Vol. 22 No. 3 (2022): November Vol. 22 No. 2 (2022): July Vol. 22 No. 1 (2022): March Vol. 21 No. 3 (2021): November More Issue