Logic : Jurnal Rancang Bangun dan Teknologi
Logic : Jurnal Rancang Bangun dan Teknologi is a peer-reviewed research journal 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.
Articles
265 Documents
<![CDATA[Analysis of OHS Costs in the Road Construction Project of Singaraja City – Mengwi (Short Cut Bedugul Point 5 - 6) ]]>
<![CDATA[I Ketut Sutapa]]>;
<![CDATA[I Nyoman Sutapa]]>;
<![CDATA[I Wayan Darya Suparta]]>;
<![CDATA[I Nyoman Ramia]]>;
<![CDATA[Denin Lintang Tuhujati]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol 21 No 2 (2021): July ]]>
Publisher : <![CDATA[Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i2.2545
<![CDATA[Short Cut Bedugul is a short road construction project on the Singaraja-Denpasar route. The short cut development includes the implementation of an occupational health and safety management system (SMK3). The 5-6 point short cut project includes the grade of a large project and places great importance on work safety. Field conditions with high rainfall make the area prone to landslides that can endanger workers, as well as environmental temperatures that reach 20oC which can affect work productivity. The objectives of this study are: To analyze the implementation of occupational safety and health (K3) on the Short Cut project point 5-6 Bedugul. To find out the amount of costs incurred in implementing K3 on the Short Cut point 5-6 Bedugul project. To analyze the percentage of safety and health costs (K3) to the short cut project value point 5-6 Bedugul. The type of research used in this research is descriptive research. and a quantitative descriptive of the construction of the Singaraja City Boundary Road - Mengwi (Short Cut Bedugul point 5–6) the use of K3 such as the use of safety helmets, light vests, masks, gloves, and safety belts is in accordance with the law and is very disciplined and obedient to existing regulations. set. The percentage of K3 costs to the project value refers to the CIRCULAR OF THE MINISTER NO. 66 / SE / M / 2015 Regarding the Cost of Implementing an Occupational Safety and Health Management System (SMK3) Construction in the Public Works Sector is 0.7%.]]>
<![CDATA[Settlement of Geosynthetic Encased Stone Columns Liquefaction Condition in Box Culvert ]]>
<![CDATA[Maftuh Ahnan]]>;
<![CDATA[Putera Agung Maha Agung]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol 21 No 1 (2021): March ]]>
Publisher : <![CDATA[Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i1.2259
<![CDATA[When the box culvert system is placed on a sandy soil layer with a relatively low bearing capacity and is disposed to potential liquefaction, the soil layer must be repaired to avoid damages to the box culvert structure. The proposed method is Geosynthetic Encased Stone Columns (GESC) to increase the bearing capacity and anticipated the liquefaction potential. however, to meet the criteria for a stable and safe GESC soil improvement in liquefaction conditions, the value of the settlement must meet the requirements for the settlement permit limit. This research was conducted to determine the potential for liquefaction at the study location, to calculate the value of single and group settlements in liquefaction conditions and to analyze the stability of single and group settlements including safe or unsafe in liquefaction conditions. Analysis of liquefaction potential was analyzed based on SPT data using the Valera and Donovan method, and settlement analysis applied the Almeida and Alexiew method. The analysis shows that potential liquefaction due to an earthquake with a magnitude of 9.0 SR will be at a depth of 4 to 8 m. Single and group settlements (144 sets) with an installation distance of 1.2 m with a diameter of 0.4 m and at a depth of 10 m are 246.23 and 214.92 mm, respectively. The entire GESC system is considered to be in an unstable and unsafe condition against potential liquefaction and box culvert loading.]]>
<![CDATA[A Design of Farmer’s Orange Field Security System Using Microcontroller Based Direct Telephone Technology ]]>
<![CDATA[Rezki Nalandari]]>;
<![CDATA[Adi Pratama Putra]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol 20 No 3 (2020): November ]]>
Publisher : <![CDATA[Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v20i3.2137
<![CDATA[The development of security system is a positive development on reducing society’s anxiety of criminal act such as theft. The security systems that are being developed today are mostly home security systems, motor cycle and cars. So far, the security system for paddy fields or agricultural fields has been minimal studied. So far, security system in farming land has been studied but in minimum frequency, such as in orange field where thefts often occur even farmers had surrounded their farming land with fences. This device made of Pir Sensor that could detect humans, it uses ATmeg328P-PU as the CPU, SIM 800L as media or device in sending messages and battery as power source. Designing this device is easy enough and affordable, this device capable in calling registered phone number in pseudecode that had been input into the program.]]>
<![CDATA[Experimentation of an Activated Carbon/Methanol Solar Refrigerator ]]>
<![CDATA[Nyoman Sugiartha]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol 20 No 2 (2020): July ]]>
Publisher : <![CDATA[Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v20i2.1822
<![CDATA[Adsorption refrigeration systems become promising alternative cooling technology for refrigeration and air conditioning applications. Thermal energy is a primary source of such systems for producing cooling capacity with less electricity usage compared to vapour compression systems. Solar energy with free-access and abundant availability in the tropics have great potential as a renewable heat source to drive the adsorption refrigeration systems through direct conversion from solar irradiation to the thermal energy. This paper describes experimental work on the performance of a solar adsorption refrigerator working with activated carbon/methanol pair in Bali area. The solar refrigerator has an adsorber with an effective surface area of 0.259 m2 enclosed in a double-glazed collector box. The cooling load of the evaporator is 1 kg of water sited inside a cooler box of 0.37 x 0.25 x 0.345 m size. The experimental tests were performed outdoor to determine system cooling capacity and solar COP. Test results indicated that the refrigerator capable of bringing down water temperature at 18 ⁰C, while the system cooling capacity and COP reach 47.5 kJ and 0.046. Moreover, it is supposed that the solar adsorption refrigerator can be applied to pre-cooling post-harvest agricultural products, mainly tomatoes, before distribution to the grocery stores or end consumers.]]>
<![CDATA[Analysis the Strength of Mild Steel Material on a Handcycle Bike Frame ]]>
<![CDATA[Andika Wisnujati]]>;
<![CDATA[Rela Adi Himarosa]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol 21 No 2 (2021): July ]]>
Publisher : <![CDATA[Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i2.2452
<![CDATA[The frame is one of the most important parts in a series of constituents of a bicycle. The materials for making bicycle frames usually use tight and strong materials such as stainless steel, carbon and titanium. Mild steel is steel with low carbon, which is about 0.05-0.30%. After conducting a tensile test on the mild steel material used on the handcycle bicycle frame, the highest stress results were 1,093.87 N/mm² and the highest strain was 0.167%. For the results of stress analysis contained in the autodesk inverter, the von mesess results are obtained for men weighing 70 kg von mesess maximum 1400 mpa and women weighing 60 kg 1200 mpa. The maximum displacement generated for men weighing 70 kg 96.63 mm and women weighing 60 kg 82.83 mm. For the safety factor obtained based on the safety number from Dobrovolsky for static loads, the safety number is 1.25-2; dynamic load 2-3 shock load 3-5 while the safety rate that occurs in the load is 0.15 for men weighing 70 kg and 0.16 for women weighing 60 kg. So the handcycle bikes that we made are safe to ride because the results obtained are still below existing standards]]>
<![CDATA[The Performance of Irregular Building Structures Using Pushover Analysis ]]>
<![CDATA[Hanan Yurizka]]>;
<![CDATA[Anis Rosyidah]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol 20 No 2 (2020): July ]]>
Publisher : <![CDATA[Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v20i2.1456
<![CDATA[High-rise buildings are at risk of collapse due to the earthquake. One method for analyzing earthquake loads is Pushover. Pushover is a non-linear static analysis to determine the behavior of a building collapse. This research was conducted to determine the performance of the setback building with a soft first story due to the earthquake based on the results of the pushover analysis curve. The structure is modeled as a 2-dimensional portal with a form of structural irregularity (setback with the soft first story) which consists of 2 structural models with different setback area ratios. The results of the analysis of this study indicate that the maximum shear force based on capacity curves in type 1 and type 2 buildings are 50260549.81 N and 53560488.63 N. Buildings with smaller setback area ratios, i.e., type 2 buildings have displacement, story drift, and base shear are more significant than type 1 buildings. Performance of type 1 and Type 2 building structures that refer to ATC-40 and FEMA 356 is at the Damage Control level.]]>
<![CDATA[The Effect of Fluid Velocity on the Diffusion of Trimethylene Glycol through a Reverse Osmosis Membrane in Microchannel -X ]]>
<![CDATA[Sugeng Hadi Susilo]]>;
<![CDATA[Zahratul Jannah]]>;
<![CDATA[R.N. Akhsanu Takwim]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol 21 No 1 (2021): March ]]>
Publisher : <![CDATA[Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i1.2271
<![CDATA[The study aims to observe the diffusion process which is influenced by different velocity and fluid concentrations. Using a microfluidic system and the diffusion process through a reverse osmosis membrane. The research was carried out by flowing fluid into the microchannel. The diffusion process is known by measuring and analyzing the density of liquid waste aquades-trimethylene glycol. The results showed the amount of diffusion through the membrane was influenced by flow velocity and fluid concentration. this is because the velocity of the flow produces pressure on the wall so that it pushes the fluid to diffuse through the membrane.]]>
<![CDATA[Proposed Control of Raw Material Inventory in Condition of Not Required With Fuzzy Mamdani Method in Cv. Pinus Bag's Specialist ]]>
<![CDATA[Agus Hindarto Wibowo]]>;
<![CDATA[Joko Susetyo]]>;
<![CDATA[Titin Isna Oesman]]>;
<![CDATA[Muhammad Yuda Aliffian]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol 20 No 3 (2020): November ]]>
Publisher : <![CDATA[Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v20i3.1835
<![CDATA[CV. Pine Bag’s Specialist is a business engaged in the manufacturing of various types of bags. One of the bags made in the form of a backpack. Parachute fabric is the main raw material for making backpacks. Uncertain demand causes a lot of accumulation (over stock) of raw materials in the storage area, so we need a method of supporting raw material inventory control to determine the optimal order. The research objective determines the optimal ordering of raw materials using variable raw material demand, raw material inventory variables and ordering variables in January the first week to March the fourth week. The Fuzzy Mamdani method used in this study because it has a flexible nature and can overcome the problem of uncertainty. The data processing of the Fuzzy Mamdani method carried out in several stages (a) the formation of the Fuzzy set, (b) the application of the implication function, (c) the composition of the rules, (d) Defuzzification. Defuzzification in research uses the centroid method. The results of Fuzzy Mamdani's manual calculation in January of the first week with input of raw material demand of 666 meters and 126 meters of inventory resulted in an optimal prediction of ordering raw materials of 876 meters. Calculations for January the second week to March the fourth week are performed with the help of the Matlab R2013a Fuzzy Toolbox software. The results of prediction data evaluation on the number of raw material orders Fuzzy Mamdani with actual data on the raw material number ordering CV. Pine Bag’s Specialist, it is known that the average absolute error (MAE) is 193.8 meters with an average percentage of absolute error (MAPE) of 22%. So, it is said that the level of accuracy of predictions is reasonable. Future research is expected in the Fuzzy Mamdani method can be used more than two inputs and one output and the addition of linguistic variables. Combine the Fuzzy Mamdani method with other raw material inventory control methods so that the results obtained are getting better.]]>
<![CDATA[Organic Waste Chopper Tool Design Using Autodesk Inventor 2015 Software ]]>
<![CDATA[Nengah Ludra Antara]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol 20 No 2 (2020): July ]]>
Publisher : <![CDATA[Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v20i2.1812
<![CDATA[In the program of mechanical engineering, the software used to draw is Autodesk Inventor. Autodesk inventor is a CAD program in the program of engineering that is applied to the design of mechanics in 3D. In designing a tool, of course, it is preceded by a planned design concept. In making a design a tool requires a process or steps for making the design. These steps include the size, dimensions, and materials used in making organic waste chopper tool. The drawing process uses the 2015 Autodesk Inventor program, the first is the making of sketches, components on the machine, followed by assembly of each component, then rendering images, animation as the final stages of drawing design input into "IDW" complete with size, scale, material. Image projection to make it easier for designers to make tools. Drawings of plan and complete details covering the scale dimensions will be able to simplify the manufacturing process (production) of the components of the tool and can reduce the risk of errors in the process of making tools.]]>
<![CDATA[Experimental Investigation on the Effect of Angles of Attack to the Flutter Speed of a Flat Plate in Axial Flow ]]>
<![CDATA[I Putu Gede Sopan Rahtika]]>;
<![CDATA[I Made Suarta]]>;
<![CDATA[I Komang Rusmariadi]]>;
<![CDATA[Putu Wijaya Sunu]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol 21 No 2 (2021): July ]]>
Publisher : <![CDATA[Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i2.2630
<![CDATA[The application of flat plates to the field of wind harvesting requires a lot of research toward the understanding of the flutter behavior of the plates. There are shortages of articles that discuss the effect of varying the angles of attack to the flutter speed of a flat plate. This research aims to conduct a basic experimental research on the effect of relative position of a thin-flat plates to the direction of the air flow to its flutter speed. In this study, a thin-flat plate was placed in a subsonic wind tunnel to test its flutter speed. The position of the plate was varied in various angles of attack. The effect of the angles of attack to the flutter speed was observed.]]>
