Articles
51 Documents
<![CDATA[Thermal Transient and Thermal Stress on Radiated Heat Float Glass ]]>
<![CDATA[Eko Julianto]]>;
<![CDATA[Waluyo Adi Siswanto]]>;
<![CDATA[Pebli Hardi]]>
<![CDATA[ JSE Journal of Science and Engineering Vol. 1 No. 1 (2020): Journal of Science and Engineering ]]>
Publisher : <![CDATA[LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT) ]]>
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DOI: 10.30650/jse.v1i1.150
<![CDATA[To conduct an experiment of thermal radiation. The researchers conducted a simulation to study the behavior of the damage float glass using Mecway 10 FEA software. The ambient time and temperature on the first float glass sheet sustaining thermal transient and thermal stress are the most important parameters to find out the part of float glass. Analyzing the results of all simulations of radiant heat and convection in transient thermal simulations on the surface of float glass to be crack and knowing the estimated time until cracked float glass with thermal stress analysis. Giving heat radiation to the exposed glass surface, to be assumed by heat exposure from 0 to 20 minutes which is 32º to 600ºC with 19 mm glass thickness using Mecway 10 FEA software. Then did a comparison of the radiation heat value convection flow rate and so that the glass experiences a thermal crack. In this process, the results of the comparison will also be reviewed and discussed at the limit of the amount of heat radiation so that the cracked glass or thermal crack. The difference in temperature and stress will increase with adding radiation heat on the glass. Critical time and temperature differences are given as reference values to predict Thermal stress in computerized applications.]]>
<![CDATA[Vibration Characteristics of Beam Structure Attached with Vibration Absorbers at its Vibrational Node and Antinode by Finite Element Analysis ]]>
<![CDATA[W. S. Ong]]>;
<![CDATA[Muhd Hafeez Zainulabidin]]>
<![CDATA[ JSE Journal of Science and Engineering Vol. 1 No. 1 (2020): Journal of Science and Engineering ]]>
Publisher : <![CDATA[LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT) ]]>
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DOI: 10.30650/jse.v1i1.519
<![CDATA[In this study, the vibration characteristics of fixed ends beam are analysed after attached with dynamic vibration absorbers at vibrational node and antinode by simulation using ANSYS APDL. This study aim to obtain the best location and optimum number of DVAs placed on the fixed ends beam in order to reduce vibration of beam. The dynamic vibration absorber were attached to the fixed ends beam vibrational node and antinode for a total of three modes of vibration. The 0.84 m long beam is modelled by ANSYS and divided into 21 elements where each element is 0.04 m. A harmonic force, Fo of 28.84 N is exerted at node 3 of beam element. Modal analysis and harmonic analysis are carried out in this study to obtain the natural frequency and frequency response of the beam respectively. The vibration characteristics of fixed ends beam without DVA and beam attached with DVAs were compared. The simulation results show reduction of vibration amplitude of the beam especially when the DVA were attached at the vibrational antinode. The DVA amplitude increase when amplitude of beam decreases. From this study, it is proved that DVAs absorb vibration of the beam structure. The best position to attach DVAs is the vibrational antinode based on the modes of vibration. The increment of DVAs number will not affect the percentage reduction of vibration amplitude as long as the DVAs are placed at optimum location.]]>
<![CDATA[Ceramic Panel for Sound Insulation Application ]]>
<![CDATA[Wan Aiman Hakim Wan Maliki]]>;
<![CDATA[Muhd Hafeez Zainulabidin]]>
<![CDATA[ JSE Journal of Science and Engineering Vol. 1 No. 1 (2020): Journal of Science and Engineering ]]>
Publisher : <![CDATA[LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT) ]]>
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DOI: 10.30650/jse.v1i1.521
<![CDATA[In order to reduce noise nowadays, many researcher find different way to solve this problem. One of the ways to reduce noise is by using a sound insulation. This research has been conducted in order to produce high density sound insulation panel made from ceramic. The fabrication of ceramic panel undergo several processes which are milling, mixing, forming, drying and sintering process. The ceramic panel of different types of forming were developed as square plate 110mm x 110 mm with a constant thickness of 5 mm. Type of forming were used for this particular study are slip casting and uniaxial press. The composition used were 100 % clay and 90% + 10 % clay cement. The transmission loss were determined by using acoustic insulation test. The apparatus consists of sound level meter, portable speaker and computer. The Sound Pressure Levels (SPL) were taken at 250 Hz, 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz which based on 1 octave frequency bands. The analysis shown that the sample 90 % + 10 % clay cement casting has the higher transmission loss in the lower frequency region, the sample 90 % + 10 % clay cement uniaxial press has the higher transmission loss in the middle frequency region and lastly the sample 100 % clay uniaxial press has the higher transmission loss in higher frequency region. The sample also were tested using Charpy impact test in order to gain their impact energy and impact strength. The tests were according to ASTM-D256. Charpy impact test can determines the amount of energy absorbed by a material during fracture. The analysis shown that the impact energy of the ceramic panel have a small percentage different. It can be concluded that uniaxial press is better than the slip casting in forming ceramic insulation panel.]]>
<![CDATA[Mechanical Behavior and Microstructural Analysis of Molybdenum-TZM Alloy Subjected to Different Annealing Temperature ]]>
<![CDATA[Muhamad Anas Munawwar Ghazali]]>;
<![CDATA[Mohd Azhar Harimon]]>;
<![CDATA[Mohammad Sukri Mustapa]]>
<![CDATA[ JSE Journal of Science and Engineering Vol. 1 No. 1 (2020): Journal of Science and Engineering ]]>
Publisher : <![CDATA[LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT) ]]>
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DOI: 10.30650/jse.v1i1.522
<![CDATA[Mo-TZM alloy is one of the most famous economic molybdenum-based alloys. The percentage of chemical composition in mass of Mo-TZM alloy are Mo-0.5Ti-0.08Zr-0.03C. By adding some Titanium and Zirconium so that the mechanical properties and recrystallization temperature of molybdenum has been corresponding improvement. The purpose of this study is to determine the effect of different annealing temperature on mechanical properties of Mo-TZM alloy. The samples will be heated at two different temperature which are 1000 oC and 1300 oC in 1 hour and 40 minutes to change their microstructure behavior. The mechanical properties of the sample like hardness will be analyzed by using Vickers Micro hardness test. The force applied is 4.903 N and Vickers micro hardness number is 0.5 HVN for 10 second. Then to observe the microstructure changes, optical microscope and Scanning Electron Microscope (SEM) is be used. At annealing temperature 1000 oC, it show values of hardness is 249.54 VHN and the grain boundary size is 0.0898mm. While at annealing temperature 1300 oC, it show the lowest values of hardness which is 243.55 VHN and the highest grain boundary size which is 0.1068 mm. By doing annealing heat treatment it will decreases hardness values and increases the size of grain boundary]]>
<![CDATA[Design a Solar Powered Stirling Engine Prototype to Produce Electricity ]]>
<![CDATA[Lee Shee Yao]]>;
<![CDATA[Hanani Abdul Wahab]]>
<![CDATA[ JSE Journal of Science and Engineering Vol. 1 No. 1 (2020): Journal of Science and Engineering ]]>
Publisher : <![CDATA[LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT) ]]>
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DOI: 10.30650/jse.v1i1.523
<![CDATA[For the concerns of environmental issue such as global warming, sustainable and green way to produce energy is highly in demand. Dish Stirling system is one of the most efficient system among others concentrated solar power technologies. However, the system is in disadvantage in terms of cost and reliability when compare to others CSP technologies. In this study, a fundamental prototype of solar powered dish Stirling engine is designed, manufactured, and tested. One component of the prototype which is the power piston is malfunctioning. It was found that the accuracy requirement of the manufacturing of the prototype was high and it requires high skill and experience in machining process.]]>
<![CDATA[Effects of Percentage Fibre with Treated and Untreated on Sound AbsorptionProperties in Rubber Wood Fibre Composite ]]>
<![CDATA[Muhammad Hanafi Abd Rahman]]>;
<![CDATA[Zaleha Mohamad]]>
<![CDATA[ JSE Journal of Science and Engineering Vol. 1 No. 2 (2020): Journal of Science and Engineering ]]>
Publisher : <![CDATA[LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT) ]]>
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DOI: 10.30650/jse.v1i2.1637
<![CDATA[Current developments on natural fibre as sound absorption purpose have attracted researcher’s attention since sound pollution has been a threat to peoples. Hence, in this study, a fibrous acoustic material, which is rubber wood fibre, was used to determine acoustical properties. To achieve higher sound absorption coefficient (SAC) especially at low frequency, pre-treatment of the fibre is needed where in this study alkaline treatment was implemented. Three different percentages of fibre, namely 20%, 25% and 30% for non-treated and treated fibre were used to study the acoustical characteristic. Impedance tube method (ITM) was used to determine SAC. From the result, it has been found that SAC for fibre treated with alkaline was better than untreated fibre at low frequency. Alkaline treatment of the rubber wood fibre reduced the fibre diameter. More tortuous path and higher airflow resistance occurred since more fibre needed to reach the volume density of the sample. This work confirms by increasing rubber wood fibre content in the sample would also increase the acoustic performance and this has been proved where 30% of fibre sample mostly demonstrated better SAC compared to other fibre content for untreated and treated fibre and can be considered as sound absorption application]]>
<![CDATA[Crack Propagation Trajectory For Kenaf Fibre Composite Under Quasi Static Loading ]]>
<![CDATA[Nurul Alya Zahari]]>;
<![CDATA[Zaleha Mohamad]]>
<![CDATA[ JSE Journal of Science and Engineering Vol. 1 No. 2 (2020): Journal of Science and Engineering ]]>
Publisher : <![CDATA[LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT) ]]>
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DOI: 10.30650/jse.v1i2.1638
<![CDATA[The cracking of the composites are worthy the attention in order to expect in which manner of failure might occur. This matter should be not underestimated because of a safe structure may fail with even microscopic flaws. The crack propagation trajectory and effects of the hole in woven and non-woven fibre orientations for epoxy based kenaf composites under quasi static loading are investigated. The shape of the work specimens is square thin plate with thickness of 3 mm. There are two types of orientations of work specimen used which are the non-woven random and plain woven with 0° and 90° fibre orientation. These work specimens made by hand lay-up method. There are three setting conditions of the work specimen used in this research such as single edge crack, single edge crack with hole, and double edge crack with two holes. The experiments of tensile tests were carried out to determine the strength of the epoxy based kenaf composites. The specimens were subjected to a concentrated load at the upper edge and fixed at the lower edge. From the data attained, indicated that fibre orientation has a significant role in defining the ultimate tensile strength. The main objective of this research is to investigate the crack propagation trajectory for epoxy based kenaf composites under quasi static loading. It shows that from the results obtained, the crack trajectories for single edge crack is a straight line. However, the existence of the hole rearrange the stress or strain field. The crack will curved towards the hole. Meanwhile, for double edge cracks with two holes, the cracks move to the near hole. The cracks then reoriented horizontally as the cracks have reformed the stress distribution at each other’s tip. After that, the cracks then captivated again by the opposite holes and curved toward s the holes. It was found that there is no significant difference between the crack propagation for non-woven and woven fibre orientation samples.]]>
<![CDATA[The Effective Control Strategy in Gunung Lingai Village due to Extreme Flood with SWOT Approach ]]>
<![CDATA[Santi Yatnikasari]]>;
<![CDATA[Sigiet Haryo Pranoto]]>;
<![CDATA[Pitoyo Pitoyo]]>
<![CDATA[ JSE Journal of Science and Engineering Vol. 1 No. 2 (2020): Journal of Science and Engineering ]]>
Publisher : <![CDATA[LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT) ]]>
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DOI: 10.30650/jse.v1i1.1639
<![CDATA[Samarinda is the capital of the East Kalimantan, which remains troubled by flood risk. The flooding phenomenon happens not only during the rainy season. Some areas in the city of Samarinda are flooded in the rain with a period of 3 hours. This research aims to establish the causes of flooding in Gunung Lingai Village, as then flood control techniques can be implemented. Gunung Lingai Village has been chosen because it is a location with a history of extreme flooding in the town of Samarinda with an area of 432.93 Ha. There are 851 flood-affected households from 1390 households with a duration of further than 7 days. This research was carried out with the combination of qualitative and quantitative approaches. Data collection was carried out by combining literature study and secondary data with factual studies to obtain primary data and in-depth interviews with flood-affected communities (mixed method). The status of the flood variables which became the baseline was that of 9 June 2019 and that of 22 May 2020. The results showed that there were two main factors causing flooding, namely natural factors and human factors. A vulnerability of social indicator was established to describe the actual condition, which was complex interaction among drainage system and public welfare. In addition, a SWOT analysis was performed on one of the selected representatives to verify the strategies on flood control system.]]>
<![CDATA[The Sound Absorption Coefficient and Noise Reduction Coefficient of Rice Husk Silica ]]>
<![CDATA[Tan Ke Wei]]>;
<![CDATA[Zaleha Mohamad]]>
<![CDATA[ JSE Journal of Science and Engineering Vol. 1 No. 2 (2020): Journal of Science and Engineering ]]>
Publisher : <![CDATA[LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT) ]]>
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DOI: 10.30650/jse.v1i2.1640
<![CDATA[Efficient noise control is neccessary to be applied to reduce the sound pollution and obtain a comfortable life. Rice husk is one of the abandoned agriculture waste material that can obtained in a large quantity which have the potential in the application of sound absorber. Rice husk silica samples have been fabricated in various composition and thickness by using epoxy and methyl ethyl ketone peroxide (MEKP) as binder. Impedance tube testing and physical test are conducted to obtain the properties of rice husk silica. The result found that specimens with higher composition of rice husk silica and using MEKP as binder have the lowest density, highest porosity and give a better sound absorption coefficient. The increment of thickness can produce a greater sound absorption at lower frequency. The results also demonstrate 20mm is the best thickness for a greater noise reduction coefficient.]]>
<![CDATA[Application and Evaluation of AHP-ELECTER Performance In The Determination of The Thesis Supervisor ]]>
<![CDATA[Asslia Johar Latipah]]>
<![CDATA[ JSE Journal of Science and Engineering Vol. 1 No. 2 (2020): Journal of Science and Engineering ]]>
Publisher : <![CDATA[LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT) ]]>
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DOI: 10.30650/jse.v2i1.1882
<![CDATA[Thesis is part of a student's study journey. Universitas Muhammadiyah Kalimantan Timur (UMKT) has a scheme for organizing a thesis that is different from other universities. This Lecturer and Student Collaboration Scheme (KDM) has the concept that thesis work is carried out in groups under the guidance of one lecturer. The role of the supervising lecturer then becomes very important because the determination of the research theme is carried out by the lecturer and students only need to work on the sub-section of the research as their thesis. The selection of supervisors then becomes important and study programs with a very large number of students in one batch as well as study programs with very few students will be overwhelmed by this scheme. The determination of the thesis supervisor is usually done by considering certain criteria. This study uses a combination of AHP and ELECTRE to analyze how the performance of the two methods when faced with the case of determining a supervisor with a different scheme from the thesis in general. The study programs selected as samples were taken from each faculty at UMKT, namely Informatics Study Program, Management Study Program, English Education Study Program, Public Health Study Program and International Relations Study Program. From the five study programs, the most widely used criteria were the functional position of the lecturer, quota, suitability of research with the lecturer roadmap, and student concentration. The results show that AHP-ELECTR can be used to determine supervisors with this KDM scheme with an average accuracy value of 83%. ELECTRE as an alternative removal method is able to eliminate prospective lecturers who do not meet the criteria.]]>
