Logic : Jurnal Rancang Bangun Dan Teknologi
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.
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<![CDATA[Performance Analysis of Signalized Intersection Due to Opening of Jatikarya Exit Access to Cimanggis – Cibitung Toll Segment Using PTV Vissim Software ]]>
<![CDATA[Reyhan Febrian Putra]]>;
<![CDATA[Eva Azhra Latifa]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 1 (2022): March ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v22i1.1-8
<![CDATA[The development of infrastructure, especially road construction, also has an impact on changes in various urban systems in an area. Developments in the transportation system, including the opening of toll road access, will certainly affect increasing traffic flow. With the opening of toll road access, it creates new intersections so that the Cibubur Alternative Road experiences a high increase, especially during peak hours. This study aims to determine the effect of access to the Cimanggis-Cibitung toll road on the performance of the Cibubur Alternative Road. The study begins with collecting data according to the parameters needed as the basis for analyzing road performance, namely the degree of saturation and the level of service based on the 2014 PKJI by comparing the conditions and assumptions of normal conditions (by dividing 75% of the existing conditions). The results of the analysis show that the highest degree of saturation is on Alternative Cibubur Road 0.74 and if it is assumed under normal conditions it is 0.99 (the lowest service level is E with the lowest speed reaching 30.0 km/hour), queue length 194.47 meters and delays time. Reaching 109.87 seconds indicates a conflict at the signalized intersection because the queue length affects the performance of the Cibubur alternative road. After doing the simulation and getting an effective intersection optimization, namely resetting the green time with VISSIM software modeling, it gives better results during peak hours and reduces the highest queue length by 56,58% and delays by 80,16%.]]>
<![CDATA[Risk Analysis of Investment Costs in PPP Projects Using Monte Carlo Simulation ]]>
<![CDATA[Roihans Muhammad Iqbal]]>;
<![CDATA[Hari Purwanto]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 1 (2022): March ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v22i1.13-21
<![CDATA[Infrastructure project investment is a substantial urgency in line with the vision of President Jokowi’s administration of developing infrastructure in Indonesia. The Government and Private Sector partnership (PPP) becomes feasible alternative to cover the financial deficit in the provision of infrastructure. The South Jakarta-Cikampek II Toll Road Project has been determined to be operated under the PPP scheme. The identification, allocation, and appropriate risk mitigation of the projects are the important success keys to provide clarity and benefits for among the parties. The purpose of this study is to analyze 27 risk variables from PT PII guidelines qualitatively and quantitatively with probabilistic principles using Monte Carlo simulations, by then accurately to estimate the values of the effect of each risk on the project investment value. The research was carried out by collecting project data, identifying risk variables, questionnaires to experts, risk quantification, Monte Carlo simulation, calculating the effect and value of risk, as well as analysis of risk allocation and mitigation based on the Pareto Principle. The study shows that of 26 influential risk categories and one (1) risk does not affect the investment component of the project. There are 12 Risks could be allocated to the Government and 14 Risks could be allocated to Private Sector. The total value of the amount of risk cost is Rp16,424,331,645,796 (21% of total risk investment value). Based on Pareto, 30% risk categories (equal to 8 risks) are the dominant factors of which equal to 70% of the total value of risk. Hence the mitigation may focus to reduce the dominant factors to lower risk by then decrease the value of risk Rp9,885,627,136,618 that equal to 60% become Rp6.538.704.509.178 (equal to 40% of risk value).]]>
<![CDATA[Effect Size of Mathematics Blended Learning Design on Increasing Mathematical Problem-Solving Ability of Polytechnic Students in the Covid-19 Pandemic Period ]]>
<![CDATA[I Ketut Darma]]>;
<![CDATA[I Gede Made Karma]]>;
<![CDATA[I Made Anom Santiana]]>;
<![CDATA[I Wayan Suastawa]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 1 (2022): March ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v22i1.43-50
<![CDATA[The purpose of this study was to determine the effect size of the blended learning design on increasing the Mathematical Problem-Solving Ability of polytechnic education students during the covid 19 pandemic. The study was carried out at the Bali State Polytechnic (BSP), using a mastery-experimental approach, with a pre-test post-test design of non-equivalent control. design groups. The subjects are students in the engineering field of BSP in 2020/2021. Samples were taken purposively as many as 10 classes and divided into experimental and control groups. Data were collected using a mathematical ability test developed by the researcher. The level of validity is between 0.31 and 0.89, the reliability is 0.97, the average difficulty level is 0.41 and the discriminatory power index is between 0.25 to 0.75. Data were analyzed using t test, paired t test and N-Gain score. There is a significant difference between the average mathematical problem solving ability of students taught using the blended learning model and being taught using the full e-learning model. The blended learning model is more effective in improving mathematical problem solving abilities than the full e learning model. The effect size is very large on increasing mathematical solving abilities in learning using blended learning. The implication is that the optimal application of the blended learning design in polytechnic education during the covid 19 pandemic, the learning process becomes more effective and succeeds in improving students' mathematical problem solving abilities. ]]>
<![CDATA[Freeze Dryer Machine Design for Mango Fruit Storage ]]>
<![CDATA[Wardika]]>;
<![CDATA[Aa Setiawan]]>;
<![CDATA[Sandi Rifqi Ridwansyah]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 1 (2022): March ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v22i1.62-69
<![CDATA[The purpose of the research on the design of this tool is to determine the cooling load on the freeze dryer and to determine the time it takes to reach a temperature of -20°C. This tool uses a vapor compression cooling system and a vacuum process means that this tool cools the storage space with air in the dry cabin. The research method is to determine the volume of the cabin to determine the capacity of the freeze dryer and determine the cooling load by calculating the product load and then calculating the heat load through the walls and other loads that generate heat. for a freeze dryer machine with a capacity of 1.8 PK. From testing the tool for 10 minutes once for 6 hours, the results of the system performance at the evaporator temperature -24.64°C and product temperature -16.2°C, COPCarnot performance of 3.77, and COPAktual of 2.87 with an efficiency of 76%, This is in line with the performance values in the COPCarnot design of 3.8 and COPActual of 3.30 with an efficiency of 87%.]]>
<![CDATA[Implementing Kansei Engineering and Quality Function Deployment Method in Designing Shoes : Case Study at Rejowinangun Original Leather ]]>
<![CDATA[Hapsoro Agung Jatmiko]]>;
<![CDATA[Danov Setiyo Nugroho]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 1 (2022): March ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v22i1.70-80
<![CDATA[SME played an important role in the economic growth in Indonesia, as Yogyakarta one of it’s promising province with relied so much on tourism and art and creative business, SME has become one of the main source of income for Yogyakarta. Rejowinangun Original Leather is one of SME in Yogyakarta that creates and produces its own hand made shoes. Not only producing themselves, this SME also buy several shoes product from another province, which ironically sells better than their own. One of the main concern of the failure in sale is the poor design of the self-made shoes. If the SME cared about their own design, it could be their selling point in order to survive and even played as an one of the big player in shoes industry. This research implementing both Kansei and QFD on the design of the shoes, thus collecting what the customer needs and creating the best design for the SME. The outcome of this research is the newly designed shoes based on what the customer needs, the shoes hopefully can also be used as a new branding image for the SME.]]>
<![CDATA[The Effect of Sodium Hydroxide Absorbent on The Exhaust Emissions From Internal Combustion Engine: ]]>
<![CDATA[Ilham Zainul Arifin]]>;
<![CDATA[Wirawan Wirawan]]>;
<![CDATA[Hari Rarindo]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 1 (2022): March ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v22i1.27-34
<![CDATA[Exhaust emissions are the residue from burning fuel which can cause air pollution. To overcome this problem, it is necessary to design a system for reducing exhaust emissions of internal combustion engine. This study aims to determine the effect of absorbent concentration on the exhaust emission from internal combustion engine. The research was carried out in 2 stages, namely designing a system for reducing exhaust emissions from internal combustion engines and processing exhaust emissions by channeling exhaust emissions into an exhaust emission reduction system. The internal combustion engine used pertalite. The exhaust emissions consisted of CO, CO2 and HC. The absorbent concentrations were 0.05 M, 0.1 M and 0.15 M. The engine speeds were 800, 1000, 1500 and 2000 rpm. The paired-t test showed that the exhaust emission reduction system in this study can reduce exhaust emission. The one-way Anova test resulted the absorbent concentration affect the exhaust gas emissions, both CO, CO2 and HC which are expressed in the efficiency of reducing exhaust emission.. The greatest efficiency in reducing exhaust emission is CO2 of 67.95%. The lowest efficiency of reducing exhaust emission is CO, which is 46.92%, while the efficiency of reducing HC emission is 62.47%.]]>
<![CDATA[The Effect of Current and Layer in Bimetallic Welding Using J4-AH36 Filler on Tensile Strength ]]>
<![CDATA[Andri Setiawan]]>;
<![CDATA[Syamsul Hadi]]>;
<![CDATA[Nila Alia]]>;
<![CDATA[Muslimin Muslimin]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 1 (2022): March ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v22i1.35-42
<![CDATA[If filler metal AH36 steel is used in bimetallic welding, it has the disadvantage of oxidation in the weld area. Also, the weld crack is encountered if filler metal J4 stainless steel is used in bimetallic welding. In this research, welding methods include the preparation of two types of base metal and a twisted combined filler of AH34 steel and J4 stainless steel as a filler rod applied. The welding of 5 mm thick bimetallic material uses the GTAW (Gas Tungsten Arc Welding) or TIG (Tungsten Inert Gas) process with a current electric welding 60 A, 70 A, and 80 A, one layer and two layers, and angle position 90o to 75o. Preparation of tensile test specimens, provision of shallow notches in the weld where the cross-sectional area of the same as the two-parent metals that have been welded together, tensile testing, and analysis of research data are conducted. The welding results using a current of 60 A with one layer showed a tensile strength of 402 MPa. However, welding with two layers decreased to 200 MPa with a difference of 50 % that means there is a significant difference. In the current of 70 A with one layer, the tensile strength is 433 MPa and with two layers, the value decreases very little at 426 MPa with a difference of 2 %, which means there is a minimal difference and makes the best current selection. For current 80 A with one layer produces tensile strength of 412 MPa. Yet, with two layers, the value decreases slightly to 380 MPa with a difference of 8 %, which means there is a relatively small difference.]]>
<![CDATA[Analysis of the Use of Ergonomic Trolley on Musculoskeletal Complaints on Worker Transporting Gallons of Water and LPG 12 Kg ]]>
<![CDATA[I Gede Santosa]]>;
<![CDATA[I Nyoman Budiartana]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 1 (2022): March ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v22i1.22-26
<![CDATA[Everyday, the use of water and gas is very important for human life, especially drinking water and LPG gas. As time goes by, the need for drinking water and LPG gas is increasing every day, because people are aware of their health and desire to live a more practical life. With the increasing demand for drinking water and LPG gas, many drinking water and LPG gas companies are packaged with large capacities. such as gallon water with a capacity of 19 liters and LPG gas measuring 12 kg. If the weight of gallon water reaches 19kg and 12kg LPG gas reaches 27kg, this can cause workers to be tired and overwhelmed to serve consumers. Moreover, consumers live on the 2nd floor apartment which must still be served. Lifting workers in general, lift gallons of water and 12kg LPG gas using their hands and carry them and the work is done repeatedly, this can cause muscle injuries, especially in the wrists, elbows and shoulders. In addition, the time used is relatively long due to the limitations of workers who can only carry 1 gallon or 1 piece of 12 kg LPG gas, especially customers with long haul-haul distances, which require workers to carry them without any tools. As a solution to these problems, an ergonomically designed trolley was made so that the lifting and transport workers could work in a healthy, safe and comfortable manner. In this study, a 12kg LPG gas carrier and 2 gallons of water will be designed and continued by analyzing the use of these tools for workers in terms of musculoskeletal muscle complaints and fatigue levels. Specifications This trolley has been ergonomically designed that has been adapted to the anthropometry of the worker's body and is capable of transporting 2 gallons of aqua or 2 12 kg LPG gas. The trolley design results with dimensions: 70 cm wide and 140 cm high with a weight of 60 kg, quite simple to move around The results of testing and analysis of musculoskeletal complaints and fatigue levels were obtained that: The average musculoskeletal complaints of workers before working using a trolley was 44.02 (±2.56) and the average musculoskeletal complaint after working using a trolley was 33.04 (±4.17) which means there is a decrease in musculoskeletal complaints by 24.9% %. The average level of fatigue of workers before working using a trolley is 44.11 (±2.17) and the average level of fatigue after working using a trolley is 33.03 (±3.22) which means there is a decrease in the level of fatigue by 25.1%.]]>
<![CDATA[Design an Automatic Transfer Switch for Solar Power Plant ]]>
<![CDATA[Adi Pratama Putra]]>;
<![CDATA[Adi Mulyadi]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 1 (2022): March ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v22i1.9-12
<![CDATA[This paper discusses the automatic transfer switch (ATS) in solar power plants. ATS is used to transfer the main electrical power to a backup power source (battery). PLN power cannot supply electricity continuously due to non-standard ATS installations, blackouts, disturbances to the generating system, and distribution system. Two ATS systems are proposed to control the switching process of PLN and PLTS automatically using inverter standby mode (ISM) and inverter off mode (IOM). The results of the application of ISM to PLN and PLTS can supply power needs based on switching techniques to avoid equipment damage. While IOM can save battery for inverter power supply.]]>
<![CDATA[Implementation of Inverse Kinematic and Trajectory Planning on 6-DOF Robotic Arm for Straight-Flat Welding Movement ]]>
<![CDATA[Muhammad Arif Nur Huda]]>;
<![CDATA[Sugeng Hadi Susilo]]>;
<![CDATA[Pribadi Mumpuni Adhi]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 1 (2022): March ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v22i1.51-61
<![CDATA[Robotic arms have been used in various processes such as for moving goods, welding, assembling, and painting. In the case of welding and painting, it is necessary to move the end-effector robot accurately and smoothly to follow the specified trajectory. In robotic arm control, 2 things are important to be analyzed and implemented in controlling the motion of the robotic arm, namely inverse kinematic and trajectory planning. In this study, the inverse kinematic and trajectory planning algorithms are implemented to the robotic arm controller in the form of an Arduino Mega 2560 microcontroller. The inverse kinematic solution uses geometric and algebraic analytical methods. while the trajectory planning method is using LSPB (Linear Segment Parabolic Blend) Trajectory in Cartesian Space. Data retrieval is done by giving 2 input coordinates of the desired position and orientation, then the data in the form of the joint angle value will be measured using a rotary encoder as an angle sensor. Furthermore, the joint angle measurement value is converted in cartesian coordinates to get the end-effector position. Data analysis is done by comparing the data value of each joint angle with the calculated value so that the error value appears. The results showed that the inverse kinematic and trajectory planning algorithms were successfully applied to the 6-DOF robotic arm to perform straight-flat welding movements. Inverse kinematic testing on both input coordinates, the average error value for joints 2, 3, and 5 is 1.82º, 1.26º, and 2.08º. Meanwhile, the average error of the end-effector position at the x and z coordinates is 2.08 mm and 12.9 mm, respectively. Then for the trajectory planning test, the error value for the end-effector position in the x and z coordinates is 2.25 mm and 10.7 mm.]]>
