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121	Engineering	ABS-282
Household Waste Management Technology as Compost Using Effective Microorganisms and Shredded Plastic at the Ngawu Asri Waste Treatment Site Gunungkidul Regency Dewi Wahyuningtyas (1*), Suparni Setyowati Rahayu (2), Gatot Santoso (3), Anak Agung Putu Susastriawan (4), Samuel Kristiyana (5), Satriawan Dini Hariyanto (6) 1) Chemical Engineering, Institut Sains & Teknologi AKPRIND, Yogyakarta, Indonesia *dewi.wahyuningtyas[at]akprind.ac.id 2) Environmental Engineering, Institut Sains & Teknologi AKPRIND, Yogyakarta, Indonesia, 3,5) Electrical Engineering, Institut Sains & Teknologi AKPRIND, Yogyakarta, Indonesia, 4,6) Mechanical Engineering, Institut Sains & Teknologi AKPRIND, Yogyakarta, Indonesia Abstract Garbage or household waste is waste that comes from daily activities in the household and does not include feces and specific waste. Most of the composition of wastes at the Ngawu Asri Waste Treatment Site, Gunungkidul Regency comes from organic wastes (food scraps) and inorganic wastes (plastics). The aims of this study are to process organic wastes by using Effective Microorganisms (EM-4) into compost and to process plastic wastes into shredded plastics as plastic recycling materials. The composting methods includes making an organic waste shredder machine, making Effective Microorganisms (EM-4) solution with concentration of 1-2% v/v water, mixing it with organic waste, processing composting, and compost analysis. The methods for shredded plastic includes making a shredder machine, testing it, and results analysis. The compost results obtained were carbon content (C) 24.381%, nitrogen (N) 1.424%, C/N ratio 17.121, black brown color, pH value 6.90 with optimum composting time of 3 weeks. The chopped plastic results obtained were 1-2 cm in size, with capacity of 50 kg/hour, with 10 Hp gasoline engine. This study has impacts for the Ngawu communities. They used compost for their plants growth and sold the production of shredded plastics to the plastic factory in Klaten Regency. Keywords: composting, effective microorganisms, organic waste, plastic waste, shredder machine Share Link | Plain Format | Corresponding Author (Dewi Wahyuningtyas)

122	Engineering	ABS-283
EMG Signal Measurement of Flexor Carpi Radialis Muscle in Post Stroke Patients and Normal Individuals Using Time Domain and Frequency Domain Feature Extraction Agung Pamungkas (a*), Lobes Herdiman (b), Susy Susmartini (b) a) Master Program of Industrial Engineering Department, Faculty of Engineering, Universitas Sebelas Maret, Jl. Ir Sutami No 36A, Surakarta, Indonesia. b) Industrial Engineering Department, Faculty of Engineering, Universitas Sebelas Maret, Jl. Ir Sutami No 36A, Surakarta, Indonesia. *pamungkas[at]ft.uns.ac.id, pamungkas.agung813816[at]gmail.com, lobesherdiman[at]staff.uns.ac.id, susy_susmartini2015[at]staff.uns.ac.id Abstract Keywords: EMG, Flexor Carpi Radialis, Time Domain, Frequency Domain, Post Stroke, Bitalino Share Link | Plain Format | Corresponding Author (Agung Pamungkas)

123	Engineering	ABS-28
Oil and Grease Contamination of Raw Water for Drinking Purposes in Karawang Regency, Indonesia Gina Lova Sari(a*), Ahsanal Kasasiah(b), Marsah Rahmawati Utami(b), Ikhwanussafa Sadidan(a), Nur Ridha Amethysia(d) a) Study Program of Environmental Engineering, Faculty of Engineering, Universitas Singaperbangsa Karawang, Karawang, Indonesia *ginalovasari[at]gmail.com b) Study Program of Pharmacy, Faculty of Health Science, Universitas Singaperbangsa Karawang- Abstract Raw water for drinking purposes in Karawang Regency has been taken from irrigation canals where the water comes from one of the most polluted rivers in the world, the Citarum River. In addition, domestic waste disposal in irrigation canals increases the threat of pollution load enhancement, especially oil and grease. The current study aims to identify oil and grease contamination in raw water for drinking purposes along irrigation canals throughout Karawang Regency. A total of 33 composite samples were taken along the irrigation canals (50 km) in Karawang Regency and analyzed using the gravimetric method, following Indonesian National Standard No. 03-7016-2004 and APHA-AWWA and WEF No. 5520F. In the current study, the presence of Cr6+, Hg, As, Cd and Pb in all water samples was also identified using Atomic Absorption Spectrometry. The results showed that oil and grease levels in 21 of 33 samples exceeded the quality standards regulated in Indonesian Government Regulation No. 22/2021, with 1.20-162.80 mg/L and 1.00 mg/L, respectively. It indicated that the water has decreased in quality and cannot be directly used as raw water for drinking purposes. Meanwhile, heavy metals were found in low concentrations, almost undetectable along the waters. Keywords: Citarum watershed, Karawang Regency, raw water for drinking purposes, oil and grease Share Link | Plain Format | Corresponding Author (Gina Lova Sari)

124	Engineering	ABS-284
OPTIMIZATION OF UNSATURATED POLYESTER RESIN MATRIX COMPOSITE MATERIALS REINFORCED BANANA (MUSA BALBISIANA) FRONDS COMPOSITION TOWARDS TENSILE TEST Novi Laura Indrayani, Riri Sadiana, Dicky Ramdani Universitas Islam 45 Engineering Faculty Jl. Cut Meutia No 83 Bekasi Abstract This study aims to find out how the physical and mechanical properties of banana tree frond fibers are strengthened by a polyester matrix with various variations of fiber fractions. The study began by making three types of specimens with differences in volume fractions, namely 6% fiber + 94% matrix, 9% fiber + 91% matrix and 12% fiber + 88% matrix with the hand lay - up method. The results of making composites are carried out physical properties testing in the form of density testing, water absorption and thick development and mechanical testing with tensile tests. The results of the physical properties test show that the average density value of each volume fraction variation is above the JIS A509 - 2003 standard. The water absorption value and the thick development of the three fraction variations are still below the maximum limit. While in mechanical properties testing, the highest tensile strength value was obtained at a volume fraction of 12% fiber + 88% matrix with an average tensile strength value of 37.28 MPa. Keywords: : Fiber Composite, Volume Fraction, Stone Banana Frond Fiber, Hand Lay - Up, Unsaturated Polyester Resin, Mechanical Property Test. Share Link | Plain Format | Corresponding Author (NoviLaura Indrayani)

125	Engineering	ABS-30
Evaluation on the Potential Production of Horizontal Moulding Crystal Clear Ice Block Applying One Direction Heat Absorption I Putu Sastra Negara (1,a), I Nyoman Suamir (1,b), and I Wayan Suirya (1,c) 1) Mechanical Engineering Department, Politeknik Negeri Bali, Jl. Kampus Bukit Jimbaran, Kuta Selatan, Badung-Bali 80364 Author Emails b) Corresponding author: nyomansuamir[at]pnb.ac.id a) putusastranegara[at]pnb.ac.id c) wayansuirya[at]pnb.ac.id Abstract The paper presents investigation on a small capacity of horizontal moulding crystal ice block machine. The investigation was motivated by the increasing need for crystal clear ice blocks in Bali as a tourist destination. Therefore, it is necessary to develop a crystal block ice machine that is functional, practical and energy efficient. A lab size ice block machine was developed. This ice machine applies a horizontal moulding with heat absorption in one direction only which conducted by using a refrigeration system with R404A. The heat absorption by the evaporator of the refrigeration system occurred only at the bottom surface of the ice-block moulding. The machine constitutes two horizontal mouldings with capacity of 125 to 150 kg ice per moulding which is equivalent to a thickness of ice formation of 25 to 30 cm. The machine was designed to be able to accommodate refrigeration system of 1 kW and 2.4 kW cooling capacity. The production potential of the horizontal-moulding crystal-clear ice block machine with different cooling capacity was tested and evaluated. The evaluation included ice temperature, ice formation rate, ice production, time of production and energy consumption. The test results showed that the ice formation rate of the machine with 1 kW and 2.4 kW cooling capacity were relatively similar at the level of 10 cm ice depth in the first 24 hours and the formation rate decreasing for about 2 cm in the following 24 hours. It was found that time required to produce 2 crystal ice blocks of 125 to 150 kg was about 3 up to 4 days. The machine with 1 kW cooling capacity continually operated during the production period but the machine with 2.4 kW cooling capacity could operate with frequent cycling on and off. It is also found that the power consumption of the ice machine with lower cooling capacity consume 30 per cent less energy than the machine with higher cooling capacity. This finding has also indicated that optimization on the cooling capacity and the application of secondary refrigerant may reduce the production time and energy use. Keywords: Horizontal moulding- crystal clear ice block- production capacity- one direction heat absorption Share Link | Plain Format | Corresponding Author (I Nyoman Suamir)

126	Engineering	ABS-32
The Effect of Elevated Temperature on The Mechanical and Morphological Properties of Aramid and Carbon Fiber Reinforced Epoxy/MWCNTs Roosdinal Umar (a*), Istiroyah (a), Herry Purnomo (b), Dandy Ramadhan Tri Hutomo (a), Yurohman (c), Mohamad Baiquni (d) a) Department of Physic, Faculty of Mathematics and Science, Brawijaya University, Malang 65145, Indonesia *roosdinalumar[at]student.ub.ac.id b) Research Center for Rocket Technology, Research Organization for Aeronautics and Space, National Research and Innovation Agency, Bogor 16350, Indonesia c) Center of Polymer Technology, Agency for the Assessment and Application of Technology, National Research and Innovation Agency, Banten 15314, Indonesia d) Directorate of Laboratory Management, Research Facilities, and Science and Technology Park, Deputy for Research and Innovation Infrastructure, National Research and Innovation Agency, Jakarta 10340, Indonesia Abstract Aramid and carbon Fiber-reinforced polymer (FRP) have been widely used in automotive and aerospace industries, due to high-strength and low-density. The development of FRP composite material needed to achieve higher mechanical properties of FRP in aerospace fabrication, especially for the performance of FRP composite exposed to elevated temperature. This study experimentally examined the effects of elevated temperature on mechanical and morphological properties of aramid and carbon reinforced epoxy/MWCNT. The tensile test was carried out at room-temperature, 50C and 120C. DGEBA (Araldite/Aradur LY5052-1) and MWCNT (XFNANO) dispersed and combined of carbon fiber (T-700S 12k) by vacuum infusion method, and characterization by tensile machine (Shimadzu AGX-plus), thermostatic chamber (Shimadzu TCE-300N), and morphological test by SEM (Phenom Pro-x), optical microscopy (Olympus-BX51). The result showed incorporated MWCNT on CFRP composites improving the ultimate tensile strength, elongation at fracture, and modulus of 13.88%, 11.46%, and 7.5%, respectively, at 120C tensile test temperature. CFRP/MWCNT showed a tensile strength increase of 18.26% and 34.08% at 50C and 120C tensile test temperature, respectively. Aramid fiber reinforced epoxy/MWCNT showed a tensile strength decrease of 10.71% and 12.49% at 50C and 120C. Morphologically, CFRP showed a great brittle than aramid fiber reinforced epoxy/MWCNT. Moreover, MWCNT reducing debonding of CFRP at elevated temperature. Therefore, this study is expected to be reference for composite materials used and replace the metal domination in rocket components for the preparation of manufacturing rocket-components at Research Organization for Aeronautics and Space, Deputy for Research, and Innovation Infrastructure. Keywords: Fiber reinforced epoxy/MWCNT - Mechanical properties - Elevated temperatures- Aerospace components. Share Link | Plain Format | Corresponding Author (Roosdinal Umar)

127	Engineering	ABS-37
Simulation of Fluid Sloshing in Core Catcher for Nuclear Accident Using Moving Particle Semi-Implicit Method Asril Pramutadi Andi Mustari, Stefany Imanuel Sihombing, Anni Nuril Hidayati Institut Teknologi Bandung Abstract Fluid sloshing simulations and tests were performed in a nuclear reactor scheme, especially core meltdown, using the moving particle semi-implicit (MPS) method. The MPS method is a method for analyzing the interactions between incompressible particles. In this method, the fluid is represented by particles, and each particle carries physical information such as position, velocity, pressure, and temperature. The fluid sloshing experiment was carried out using a glass bowl with dimensions of 11 cm x 20 cm x 9 cm and a glass cup with a diameter of 7 cm. The fluids used are water and cooking oil. The results of experiments and simulations with MPS show that the sloshing height of the water both in the middle and at outer wall of the bowl is higher than oil due to the greater viscosity of water. The fluid becomes thinner and easier to move as the viscosity increases. In addition, the results indicate that sloshing height of the fluid at the outer wall of the bowl is always greater than in the center of the bowl due to the forces acting on the fluid when it comes into contact with the walls of the bowl. The sloshing height from the experiment is greater than the simulation results due to the lifting process of the glass. This study conducted experiments and simulations to determine the fluid dynamics and the effect of fluid differences during fluid sloshing on a representative surface with a core catcher. Keywords: Core catcher, Fluid, Lagrangian, Melting, Moving Particle Semi-Implicit, Navier-Stokes Share Link | Plain Format | Corresponding Author (asril pramutadi andi mustari)

128	Engineering	ABS-38
Study of Thickness Effect on Freeze-Valve Scheme for MSR (Molten Salt Reactor) Safety System Asril Pramutadi Andi Mustari, Virgo Eben, Muhammad Rizqie Arbie Institut Teknologi Bandung Abstract Molten Salt Reactor (MSR) is a liquid fuel reactor type candidate for Generation IV reactors due to its excellent safety system. A freeze valve is one of the safety systems used in MSR to prevent reactor accidents due to uncontrolled fuel temperature increases. The freeze valve is designed to melt when the fuel temperature approaches the melting point of the reactor wall and opens the fuel path to the subcritical tank. Several experiments have been successfully carried out in this research to study the mechanism of action of the freeze-valve. This research was conducted to analyze the effect of different thicknesses on the freeze-valve (paraffin material) with hot fluid at 900C. The thickness variations used were 9, 11, and 16 mm with the same diameter, namely 28 mm. It is found about 9 mm thickness is needed in order to have an opening within 10 minutes. Keywords: Freeze-valve, paraffin, thickness, temperature, Molten Salt Reactor (MSR) Share Link | Plain Format | Corresponding Author (asril pramutadi andi mustari)

129	Engineering	ABS-39
Study of Physical and Chemical Properties Of Drinking Water Sources On The Citarum River Irrigation Area In Karawang, West Java, Indonesia Ikhwanussafa Sadidan, Gina Lova Sari, Ahsanal Kasasiah, Marsah R Utami, Nur Ridha Amethysia 1. Department of Environmental Engineering, Faculty of Engineering, Universitas Singaperbangsa Karawang, Karawang, Indonesia, 2. Department of Environmental Engineering, Faculty of Engineering, Universitas Singaperbangsa Karawang, Karawang, Indonesia, 3. Department of Pharmacy, Faculty of Health Science, Universitas Singaperbangsa Karawang, Karawang, Indonesia, 4. Department of Pharmacy, Faculty of Health Science, Universitas Singaperbangsa Karawang, Karawang, Indonesia, 5. Department of Environmental Engineering, Faculty of Engineering, Universitas Singaperbangsa Karawang, Karawang, Indonesia Abstract Citarum River in West Java has been named as the most polluted river in the world. The irrigation stream plays an important role in society as the source of agricultural and drinking water. However, the increasing number of industries and population density along the river have made this river dirtier. This study aims to determine the physical and chemical characteristics of water in the Citarum River irrigation area. There were 33 samples that were taken for every 1,5 km. The physical chemical water parameters was tested at DLHK Karawang Water Laboratory. The water surface has a more sharp color and smell when entering the industrial areas. This finding indicates that several chemical wastes are dumped directly into the water. The turbid color of the river water exceeds the set threshold. In addition, the dissolved iron content was above the standard. The results of this research can be implemented in the fields of water management, environment, and public health. Moreover, the results can be used as a basis for the government to make regulations. In addition, this can be used for other researchers in the development of science. Keywords: Citarum- River- Chemical- Physical- Environment Share Link | Plain Format | Corresponding Author (Ikhwanussafa Sadidan)

130	Engineering	ABS-296
Development of an Arduino-Based Monitoring System for Pico-Hydro Power Plants Agus Supardi, Muhammad Maskur Abdulah Department of Electrical Engineering, Universitas Muhammadiyah Surakarta, Surakarta, Central Java, Indonesia Abstract One of the problems faced by people in remote areas is the unavailability of infrastructure for power distribution. The available rivers can be used to generate electrical energy. The developed systems must be inexpensive, easy to operate and reliable. It should be equipped with a monitoring system to display the output. This study aims to develop a pico-hydro power plant and its monitoring system to meet the power needs in remote areas. The power plant consists of a small turbine, a generator, a battery charger, and a battery while the monitoring system consists of a current sensor, voltage sensor, Arduino nano, and a display. The system was tested in the laboratory and the river. The test of the DC voltage sensor, AC voltage sensor, and DC current sensor produces errors of 1.88%, 5.29%, and 1.25% respectively. The no-load test shows that the system generates a voltage of 12.77 - 16.6 VDC and 224 - 245 VAC when rotated at 696 - 1363 RPM. When loaded, the system generates voltages of 12 - 12.8 VDC and 225 - 247 VAC when rotated at 1332 - 1564 RPM. The developed system can be used by people in remote areas to meet their power needs. Keywords: Pico-hydro- Power Plant- Monitoring system Share Link | Plain Format | Corresponding Author (Agus Supardi)

131	Engineering	ABS-298
Smart Waste Management in IoT-Based Urban Waste Management in Surabaya City Sunarto1, Tri Sulistyaningsih2, Umi Kulsum3 1Department of Civic Engineering, Faculty of Engineering, Universitas Muhammadiyah Malang 2Department of Government Studies, Faculty of Social and Political Sciences, Universitas Muhammadiyah Malang 3Department of Government Affairs and Public Administration, Universitas Muhammadiyah Yogyakarta Abstract The city of Surabaya as the most populous city in East Java will certainly have a waste problem that must be resolved every day, especially the problem of household waste generated by Surabaya residents every day. The average urban resident can produce around 0.64 kg of waste per day, where in Surabaya the amount of waste transported is around 75.6%. If the process of transporting waste is not handled properly it will cause accumulation of waste. The Smart Waste Management system is used to provide a waste management proposal starting from determining temporary waste disposal sites (TPS), garbage transport fleets to waste transportation scheduling. Optimization of waste handling is carried out in order to obtain efficiency and effectiveness in handling urban waste. This study aims to describe the smart waste management implemented in the city of Surabaya as part of an effort to control IoT-based waste. This study uses a type of qualitative research with the help of Nvivo 12 Plus software to analyze data obtained from secondary data sources. The success of implementing smart waste management is determined by the active role of the government, the community, and the Waste Bank which has been formed from the RT/RW level per region. The system created with the help of AI is to see the state of the trash can, which is then interpreted into information. The system will automatically record the type and amount of waste disposed of. Implications- This research is expected to be able to contribute to the implementation of waste management for the City Government of Surabaya and as evaluation material for local, provincial, NGO and community governments. Keywords: smart waste management, urban solid waste, AI Share Link | Plain Format | Corresponding Author (Sunarto Sunarto)

132	Engineering	ABS-302
COMBUSTION VELOCITY CONSTANT OF GASOLINE - METANOL - (ETHANOL) MIXTURE USING THE SINGLE DROPLET COMBUSTION METHOD Alvin Damara (a), Budi Waluyo(b), Saifudin(b) a) Student of Automotive Department, Engineering Faculty Universitas Muhammadiyah Magelang b) Engineering Faculty of Universitas Muhammadiyah Magelang Abstract Methanol was one of candidates to blend or substitute the fossil fuel. The problem of separating the mixture of gasoline and methanol fuel has been solved by adding a certain amount of ethanol. However, the combustion speed characteristics have not been disclosed which is one of the important properties of SI Engine fuel. This study aims to measure the combustion velocity constant in a homogeneous mixture of gasoline - methanol - (ethanol) from previous studies. The method used in this study is the single droplet combustion method. From the test results, the burning speed of gasoline - methanol - (ethanol) fuel is faster than pure gasoline, one of which is due to the Micro-explosion phenomenon which speeds up the combustion rate. The more methanol-(ethanol) mixture causes the flame to become smaller and the micro-explosion phenomenon also easily occurs. Keywords: Gasoline, Methanol, Ethanol, Explosion Share Link | Plain Format | Corresponding Author (Alvin Damara)

133	Engineering	ABS-303
Engineering For Making Commercial Compost Fertilizer Of Oyster Mushroom Waste Baglog Using Molasses Activator In Efforts To Implement Green Economy Abel Malvin Putra Hia, Dr. Dra. Suparni Setyowati Rahayu, M.Si, Dr. Muchlis, SP., M.Sc Institute Science and Technology AKPRIND Yogyakarta Abstract Bleberan Village, Gunungkidul Regency, Yogyakarta has an oyster mushroom farming business that has been working with Korea since 2016. The problem experienced by oyster mushroom farmers in Bleberan village is that there is no use of unused baglog waste so that it pollutes the environment. So that efforts are needed so that the baglog waste does not pollute the environment, namely by utilizing it into compost that is of selling value. The method of taking materials is a method of taking directly where the composting material is taken in the farmer^s coup. The measured parameters are Temperature, pH, C-Organic, N Total, C/N Ratio to the weight of baglog raw materials which is constant 2 kg and varied on the addition of cow dung. The results showed that the average content of C-Organic content was 60% and N Total 1% and C/N the average ratio was 40, this shows that the compost for oyster mushroom baglog waste has not met the quality standards of SNI 19- 7030-2004. The sale of baglog waste compost has a good selling value with an estimated production of 1200 kg per year with a BEP of 446.2 kg, which when farmers can sell around 446.2 kg per year, it will already reap profits. With this, farmers have been able to implement the Green Economy in oyster mushroom production activities where unused baglog waste can be resold by converting it into compost. Keywords: Compost, Baglog, Cow Dung, Molasses, Greeen Economy Share Link | Plain Format | Corresponding Author (ABEL MALVIN PUTRA HIA)

134	Engineering	ABS-49
Effect of concrete strength and FRP layer on FRP-Confined Artificial Lightweight Aggregate Concrete Butje A. Louk Fanggi, Obed O. N. Nenobais, Ambrosius R. L. Wayan Departemen of Civil Engineering, Politeknik Negeri Kupang Abstract Compared to conventional concrete, lightweight aggregate concrete has numerous benefits. However, its strength and ductility are inferior to those of standard concrete. This study investigates the impact of concrete strength and FRP layers on the behavior of lightweight aggregate concrete confined with FRP. Eight lightweight aggregate concretes consisting of artificial lightweight aggregate were manufactured, covered with FRP, and then tested for failure. It is demonstrated that increasing the strength of concrete and the FRP layer increases the strength and ductility of lightweight aggregate concrete. This study improves the use of lightweight aggregate concrete in civil structures. Keywords: lightweight aggregate concrete, ductility, and strength Share Link | Plain Format | Corresponding Author (Butje Alfonsius Louk Fanggi)

135	Engineering	ABS-305
Comparative Analysis of E-learning Methods to Improve Students English Outcome during COVID 19 Pandemic Period Aris Rakhmadi Department of Informatics Engineering, Faculty of Communication Science and Informatics, Universitas Muhammadiyah Surakarta, Surakarta, Indonesia Abstract The result of the English Proficiency Test (TOEP) of UMS students in the first and second periods of 2021 shows an increase in student failures, from 33.96% to 50.82%. The increase of TOEP failures means the possibility of mistakes and deficiencies in the teaching and learning process, in point of fact that learning in the Covid-19 pandemic era does not allow face-to-face lectures. The purpose of this research is to compare the results of the class-based learning model with the two e-learning model- Schoology and OpenLearning. The aids of this research are projected to provide an advice to the university in choosing e-learning platform to reduce student failure rates in the TOEP exam. This research uses Analysis of Covariance (ANCOVA) to compare differences in learning outcomes between the three groups of students- traditional class, e-learning Schoology and e-learning OpenLearning groups. The assumption test of linearity and homogeneity of the data has been fulfilled by showing a significance value of 0.891 which is greater than the 5% significance limit. The results show that there is a statistically significant interaction between learning methods and GPA for their effect on students^ TOEP scores. Research also shows that on average students using the Schoology platform have the highest TOEP scores compared to other methods. This condition is indicated by the average value of 422.99 which is higher than the other group methods. Keywords: E-learning- learning method- pandemic- information technology. Share Link | Plain Format | Corresponding Author (Aris Rakhmadi)

136	Engineering	ABS-306
Experimental Study of Half-Cycle Refrigeration System on Temperature Profile of LPG-Fueled Vehicles for Agricultural Transport Muhammad Latifur Rochman (a,b*), Dimas Riki Romadhon(b,c), Rama Pradana Aditya(b,c), Prima Nofan Ryastama(b,c), Damar Setyo Prakasa(b,c), Ahmad Tresno Adi(a,b), Dhasa Ikrar Setyanansyach(a,b), Muji Setiyo(a,b,c) (a) Department of Mechanical Engineering, Universitas Muhammadiyah Magelang, Indonesia (b) Center of Energy for Society and Industry, Universitas Muhammadiyah Magelang, Indonesia (c) Department of Automotive Engineering, Universitas Muhammadiyah Magelang, Indonesia Abstract This paper reports the experimental cooling effect used on LPG-fueled vehicles to transport agricultural products. The fuel line was modified by adding an evaporator equipped with an expansion valve between the LPG tank and the vaporizer. The equipment is installed in a specially made box. The research was conducted on a 1495 cc engine with a special evaporator which was tested at variations of blower speed levels 1, 2, and 3. The tests were carried out at engine speeds of 1000, 2000, and 3000 rpm. The results showed the lowest cooling effect at blower speed level 1 with an engine speed of 1000 rpm and the highest at blower speed level 3 with an engine speed of 3000 rpm. The greatest cooling effect was obtained at 373 Watts at 3000 rpm engine speed and level 3 blower speed. Keywords: Half-cycle refrigeration, Cooling effect, LPG fueled vehicle, Agricultural products Share Link | Plain Format | Corresponding Author (Muhammad Latifur Rochman)

137	Engineering	ABS-308
Dijkstra Algorithm Implementation to Determine the Shortest Route to Hospital: A Case Study in Magelang District Indonesia Febri Kurniawan(a), R Arri Widyanto(b*), Pristi Sukmasetya(a) (a) Department of Informatics Engineering, (b)Department of Information Technology Universitas Muhammadiyah Magelang, 56172, Indonesia Abstract Digital maps are an important tool used to find a place. The use of digital maps is very diverse, including to provide routes from one place to another. The map can also show that the route to which the traffic is congested so that you can find another route. However, sometimes maps provide ambiguous routes so that users can get lost. This is of course very inconvenient if in an emergency situation to find the location of the nearest hospital. Determine the shortest route to the nearest hospital so as to save time in an emergency. The method used in this research is Dijkstra^s algorithm. Determination of the current location and the shortest route to the nearest hospital. Maximize map utilization with the shortest route to the nearest hospital. Keywords: Dijkstra Algorithm- Maps- Shortest Route. Share Link | Plain Format | Corresponding Author (R Arri Widyanto)

138	Engineering	ABS-310
Organic Waste Recycle For Production Of Green Biogas Energy Suparni Setyowati Rahayu (a*), A.A.P. Susastriawan (b), Beny Firman (c), Suminah (d), Okid Parama Astirin (e) a) Department of Environmental Engineering, Institut Sains & Teknologi AKPRIND, Yogyakarta, Indonesia 55222 *suparnirahayu[at]akprind.ac.id b) Department of Mechanical Engineering, Institut Sains & Teknologi AKPRIND, Yogyakarta, Indonesia 55222 c) Department of Electrical Engineering, Institut Sains & Teknologi AKPRIND, Yogyakarta, Indonesia 55222 d) Department of Extension and Communication Agriculture, Sebelas Maret University, Surakarta, Indonesia 57126 e) Department of Biology, Sebelas Maret University, Surakarta, Indonesia 57126 Abstract It is about 2.64 tons per day of organic waste is disposal by 8.470 residents of Nogotirto Gamping Village Sleman Yogyakarta. The odor of the waste is very disturbing for the neighborhood when the waste untreated well. Thus, it is important to treat the waste properly in order to encounter the problem. The present work aims to develop Biosam digester which is used for converting organic waste into useful renewable energy ^biogas^. The present work also objective to fundamentally examine optimization characteristics organic matter degradation of organic household waste by anaerobic method and utilizing cow manure in biogas production. Utilizing microorganisms from cow dung is an innovation and is the novelty of this research. Removal of organic material is unique because it is facilitated by two factors. The first factor is the amount of concentration microorganisms from cow dung that function as decomposers of organic matter and controller removal selectivity to degrade organic matter. The second factor is the HRT is the average period required for the substrate to react with the bacteria methanogen in digester. The results shows that the 10 m3 biosam digester is able to be built using simple and low cost in Nogotirto Gamping Village and able to generate biogas which has been used for cooking fuel by neighboring household. Keywords: Biosam, biogas, energy, organic, waste Share Link | Plain Format | Corresponding Author (Suparni Setyowati Rahayu)

139	Engineering	ABS-311
The Quality Control of Refinery Bleaching Deodorize Palm (RBDP) Olein with variations of Phosphoric Acid (H3PO4) and Bleaching Eart (BE) Istianto Budhi Rahardja, Azhar Basyir Rantawi, Hendra Saputra, Dian Oktavia Pambudi Politeknik Kelapa Sawit Citra Widya Edukasi, Bekasi Abstract Crude palm oil (CPO) is the result of the production process of processing palm oil from fresh fruit bunches (FFB) of oil palm plantations. CPO is referred to as crude palm oil which is refined to become cooking oil for public consumption. The process of refining CPO to become cooking oil is carried out by the Refinery Bleaching Deodorize Palm (RBDP) Olein process. Researchers carried out variations of added ingredients in the RBDP Olein process to find out the quality results adjusted to SNI 01-0018-2006. The tests carried out were free fatty acids (ALB), water content (moisture), dirt content (dirt). By varying the added ingredients in the RBDP Olein process, differences in water content, impurities and free fatty acids are produced. Keywords: Crude Palm Oil, Control Quality, Free Fatty Acids, Moisture, Dirt Share Link | Plain Format | Corresponding Author (Istianto Budhi Rahardja)

140	Engineering	ABS-313
Prototype Whatsapp Bot Based Drug Consultation Novita Putri Dewita Sari 1 , Nafa Umma 1, Riza Nur Afifah 1 , Maulana Yusuf Baharudin 1 , Prasojo Pribadi 1.2* , Setiyo Budi Santoso 1.2 Universitas Muhammadiyah Magelang Pusat Studi Digital Farmasi Abstract Services through social media are in great demand because they are direct, convenient and effective besides that social media allows pharmacists to reach consumers quickly and more easily . Destination making WhatsApp Bot to make it easier for users and service providers to communicate, consult and obtain information quickly by utilizing the quick reply feature. The data collection method used for this research was conducted Literature Review. With the search strategy used for get source relevant information in order to question on the research could answer and get relevant references. Process in search conducted use machine Google Chrome search with site address https://scholar.google.co.id/. With keywords used in search that is ^ChatBot AND Whatsapp AND Health service^. Selected articles have criteria inclusion that is article national and international with range 10 years time lastly, a website based application, and load design about WhatsApp Bots. WhatsApp Bot was created for the benefit of consumers and also to assist health workers in carrying out health services as content health Application is a health service application that contains and presents information about health. Keywords: WhatsApp, Chatbot, Consulting Medicine, Medicine Share Link | Plain Format | Corresponding Author (Nafa Umma)

141	Engineering	ABS-314
Automatic Odor Control System In Broiler Chicken Coops Using MQ-135 And DHT 11 Sensors Dimas Ahmareza, Andi Widiyanto, Setiya Nugroho Informatics Engineering, Engineering Faculty, Universitas Muhammadiyah Magelang Abstract Broiler chicken farm waste is in the form of spilled water and mixed feed and chicken manure which causes an unpleasant odor. These odors are called ammonia gas and hydrogen sulfide gas, dimentyl sulfide, carbon disulfide and mercaptans. In broiler chicken coops the temperature and humidity needed to warm the chickens are around 25 to 29 degrees Celsius and the required humidity is around 50 to 70 percent. To solve this problem, an odor control system is needed while maintaining the temperature and humidity of the coops. This research produces an automatic system to control chicken coop odors and maintain temperature and humidity. The experimental method in this study is to simulate the system on a miniature cage with a scale of 1 to 8 and send data to thingspeak in real time. Changes in the temperature of the chicken coop in the morning and evening are directly proportional to the ammonia levels, but not during the day. Bamboo charcoal is effective for neutralizing chicken coop odors.The results of this study have implications in the fields of automatic control and the Internet of Things Keywords: Automatic Control System, Odor, Chicken Coops, Bamboo Charcoal Share Link | Plain Format | Corresponding Author (Andi Widiyanto)

142	Engineering	ABS-60
Toxicity of Various Organic Substances in Wastewater and Evaluated on Daphnia magna Latifa Mirzatika Al-Rosyid (1*), Sarwoko Mangkoedihardjo (2), Sawitri Komarayanti (3) 1) Department of Environmental Engineering, Faculty of Engineering, University of Muhammadiyah Jember, Jember 68121, Indonesia. *latifa[at]unmuhjember.ac.id 2) Department of Environmental Engineering, Faculty of Civil, Planning and Geo Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia. 3) Department of Biology Education, Faculty of Teacher Training and Education, University of Muhammadiyah Jember, Jember 68121, Indonesia Abstract In accordance with the quantity complexity, organic substances have the complexity of pollutant quality. Wastewater with a high content of pollutants can be harmful to the biota in salt water and fresh water. There is a change in the level of danger from substances that are not mixed to mixed. This study is important and necessary for the discharge of wastewater. The objective is to obtain varied range of substances, also determining the quality of wastewater discharging to fresh waters. COD analysis using gas chromatography (GC7900, Hongkong). Toxicity test on D. magna using Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms (USEPA, 2002). Pow variability and BOD/COD ratio had a negative correlation of -0.486 (Pearson Sig 95%). Diazinon-formaldehyde-IPA showed the lowest LC-50 (11.82 mg/L) in D. magna. There is compatibility between wastewater in the field and artificial wastewater in a mixture of organic acetic acid-IPA-formaldehyde in the biodegradable zone. The results of the BOD/COD ratio of the real material are similar to the reference material range in a mixture of organic matter acetic acid-IPA-formaldehyde in the biodegradable zone. This shows that acetic acid-IPA-formaldehyde can be used as a comparison of the six types of real materials, at any concentration. Keywords: toxicity- organic substances- wastewater- Daphnia magna Share Link | Plain Format | Corresponding Author (Latifa Mirzatika Al-Rosyid)

143	Engineering	ABS-316
Ergonomic Approach: Posture Analysis and Design of Activity Aids for The Elderly Ratnanto Fitriadi 1), Arif Farhan Syach 2), Afiqoh Akmalia Fahmi 1), Etika Muslimah 1), Indah Pratiwi 1) 1) Puslogin, Pusat Studi Logistik dan Optimisasi Industri Universitas Muhammadiyah Surakarta 2) Teknik Industri Universitas Muhammadiyah Surakarta Abstract The ratio of dependence of the elderly to the productive age in Indonesia continues to increase which correlates with the need for facilities. One of the facilities needed and commonly used together with the productive age is the bathroom. Most Indonesians have permanent bathtubs and toilet squats that cause the elderly to move with a hunched and crouched posture, endangering the safety and health of the elderly and the potential for MSDs. The purpose of this study is to design bathroom activity aids that are safe for the elderly and can still be used by the productive age. The methods used are NBM, REBA, and anthropometry. The results of the study found 1 elderly at ^high^ NBM risk, 15 at ^Medium^ risk, and 14 at ^Low^ risk. REBA calculations found 1 ^High^ risk posture and 2 ^Medium^ risk postures. The recommended aids is the ^Multifunctional Bath Chair^ designed with SOLIDWORKS with an Anthropometric adjustable size. Aids are designed for bathing, urination or defecation activities that can be folded against the wall. Of the 3 proposed postures that Mannequin CATIA simulated, it resulted in a decrease in the risk level of REBA after using the tool, thereby reducing the risk of MSDs complaints in the elderly Keywords: Posture analysis, Ergonomic aids, design, elderly Share Link | Plain Format | Corresponding Author (Ratnanto Fitriadi)

144	Engineering	ABS-319
Implementation of Predictive Maintenance on Defense Radar Using the FMECA Method and PHP Software to Support Maintenance Action Decision Making. Hendrawan Candra Purnama (1*)- Susy Susmartini (2)- Lobes Herdiman (2) 1. Master Graduate Program in Industrial Engineering Department, Faculty of Engineering. Universitas Sebelas Maret Surakarta. * cps2ti2021[at]student.uns.ac.id- C1P1hendrawan[at]gmail.com 2. Industrial Engineering Program, Faculty of Engineering. Universitas Sebelas Maret Surakarta. Abstract Introduction: The operational readiness of the defense radar is crucial in protecting the country^s sovereignty from aerial threats. Proper monitoring of radar health status needs to be continuously developed so that it can support high operational performance. Prioritizing equipment repairs through appropriate predictive maintenance will assist radar technicians in making maintenance action decisions, thereby preventing fatal breakdowns. Purpose: This study aims to add maintenance techniques to defense radar with predictive maintenance so that the system can predict critical failures and prevent fatal breakdowns. Method: This study uses Failure mode effect and criticality analysis (FMECA) method to analyze all possible failures, then calculate the risk priority number (RPN) and PHP software, to provide priority suggestions for handling failures in non-emergency conditions. Main Finding: Built-in test equipment (BITE) system integration on all subsystem at radar station to support technicians in monitoring the radar health status in one screen and support the decision-making action for maintenance. Implication: This study can be useful in the development of maintenance technology for electronic, mechanical, and industrial systems that have system complexity so as to help find critical components that need deeper attention. Keywords: Electronics system- FMECA- Predictive maintenance- Risk priority Share Link | Plain Format | Corresponding Author (Hendrawan Candra Purnama)

145	Engineering	ABS-321
PERFORMANCE ANALYSIS OF STIRLING ENGINE TYPE ALPHA USING THERMODYNAMIC APPROACH BASED ON SCHMIDT THEORY Raden Hengki Rahmanto, Yopi Handoyo, Fahrizal Zain Asrori Universitas Islam 45 Jalan Cut Meutia No. 83, Bekasi 17113, Indonesia Abstract Environmental concern and the impact on climate change has spawned various technological innovations for high efficiency engines that save fuel and produce less carbon emissions. One of the technological innovations that attracted attention was the Stirling engine. Because it operates on a closed cycle and can use a variety of heat sources for its operation, the engine produces no emissions at all. The efficiency of this machine is also very high, therefore this machine has enormous potential as an alternative driving engine that is environmentally friendly in the future. This research aims to design a Stirling engine type Alpha with a capacity of 228 cc with a phase angle of 90 degrees, then analyze its performance in the form of power indicators and thermal efficiency indicators and determine the effect of the increase in temperature difference between the compression chamber temperature and the expansion chamber temperature towards engine rotation speed. The method used to analyze engine performance is the Schmidt method, which is a Stirling engine performance analysis method based on isothermal expansion and ideal gas compression. The result of this research is that the Stirling engine which is designed starts working when the compression chamber temperature is 31.9 degrees Celsius and the expansion chamber temperature is 482.2 degrees Celsius. The highest engine speed is 598 rpm which is obtained at a compression chamber temperature of 45.5 degrees Celsius and an expansion chamber temperature of 662.4 degrees Celsius. The engine power indicator is 194.6 watt at 598 rpm, while the thermal efficiency indicator is 65.94 percent. Based on the experimental data, it is also known that the increase in temperature difference between the compression chamber temperature and the expansion chamber temperature causes an increase in engine rotation speed. Keywords: Stirling Engine Type Alpha- Schmidt Theory- Thermodynamic Approach Share Link | Plain Format | Corresponding Author (Raden Hengki Rahmanto)

146	Engineering	ABS-323
Maintenance Improvement Through Implementation of RCM and FMECA on Cooling Unit Radar System Hendrawan Candra Purnama (1*)- Lobes Herdiman (2)- Susy Susmartini (2) 1. Master Graduate Program in Industrial Engineering Department, Faculty of Engineering. Universitas Sebelas Maret Surakarta. * cps2ti2021[at]student.uns.ac.id- C1P1hendrawan[at]gmail.com 2. Industrial Engineering Program, Faculty of Engineering. Universitas Sebelas Maret Surakarta. Abstract Introduction: The readiness of military defense radar is absolute in air surveillance to keep from potential threats that may endanger the security of nation. Good maintenance is closely related to the readiness level of the defense radar system. Purpose: This study aims to localize the components of the radar cooling system which need to have more spare parts inventory because they have a higher probability of failure compared to other components. Methods: Maintenance through the application of Reliability Centered Maintenance (RCM) and Failure Mode Effect and Criticality Analysis (FMECA) could be one solution in maintaining the readiness of the air defense system. Main finding: Mean time to failure (MTTF) calculations can provide predictions of the maintenance time that must be done and preparation for the availability of the required spare parts. Implication: The research begins with collecting data on function, performance, component item health status, and failure records that have occurred. Critical analysis using FMECA to support information for CRM about each items function failure mode, probability occurrence, failure causes, and effect. This is necessary to determine the maintenance task and prevent the possibility of system breakdown or fatal damage. Keywords: Maintenance- RCM- FMECA- Critical failures Share Link | Plain Format | Corresponding Author (Hendrawan Candra Purnama)

147	Engineering	ABS-68
Development of Driver Behavior Research on Vehicles: Article Review Suroto Munahar, M.Munadi, Bagiyo Condro Purnomo, Husni Rakhmawan Fatoni Automotive Engineering, Universitas Muhammadiyah, Magelang, Magelang, Indonesia Mechanical Engineering, Diponegoro University, Semarang, Indonesia Laboratorium of Automotive Engineering, Universitas Muhammadiyah Magelang, Magelang, Indonesia Abstract Driver behavior is a variable that significantly influences fuel use, which is a very concerning issue due to the high cost of fossil fuels caused by the limited amount of energy in the market. Therefore, several breakthroughs have been conducted to realize vehicles with high fuel efficiency. This is in addition to the continuous study of electric, hybrid, gas, and fuel cell vehicles, as well as the development of intelligent control systems. Research on driver behavior has been carried out with several variables, however, none have been conducted on this factor related to fuel consumption. This research aims to review the development of driver behavior as the supporting variable in vehicles. Data were collected from dozens of scientific articles stored in search engines, such as Science Direct, Scopus, Springer link, and ProQuest. The articles found were then filtered based on the closeness with the themes discussed, hence only 13 were reviewed and grouped into five research theme areas. These include car, safety systems, vehicle and emission control, as well graphic display themes. The results provided an overview of the potential development of driver behavior in the future. Keywords: Driver behavior, fuel, energy saving, vehicles, efficiency Share Link | Plain Format | Corresponding Author (Suroto Munahar)

148	Engineering	ABS-326
Comparative Analysis of Land Surface Temperature Before and During the Large-Scale Social Restrictions Due to Covid-19 In Jabodetabek, Indonesia Yuli Priyana (a*), Nada Salsabila Firdaus (a,b), Jumadi (a), Choirul Amin (a), Hamim Zaky Hadibasyir (a,b) a) Faculty of Geography, Universitas Muhammadiyah Surakarta, Indonesia *yp121[at]ums.ac.id b) Geo-information and Data Analytics (GiDA) Research Group, Sukoharjo, Indonesia Abstract Large-scale social restrictions (LSSR) has been implemented in various cities around the world, including in Jabodetabek (Jakarta, Bogor, Depok, Tangerang, Bekasi), Indonesia, to limit anthropogenic activities that involve social interactions to reduce the spread of Covid-19. Restrictions on anthropogenic activities might have an impact on land surface temperatures (LST) in Jakarta and its surrounding areas. This research aims a) to analyze the timeline of the Covid-19 policy, b) to analyze spatial and temporal LST dynamics, and c) to analyze the impact of LSSR on LST in Jabodetabek. LST were derived using Landsat 8 imagery, then spatial and temporal analysis were conducted by comparing several images with different acquisition dates. In general, the policy phase of adjusting the intensity of human activity consists of total LSSR and transitional LSSR. At the time before LSSR policy was implemented in Jakarta, there were relatively high LST in Jabodetabek concentrated in almost the entire Jakarta area, almost half of Bekasi and several other areas directly adjacent to Jakarta. LST were low in the south and southwest of Bogor where the area is mountainous, and the northern part of Bekasi. When entering total LSSR phase 1 (22 April 2020), the LST in Jabodetabek decreased quite drastically, then continued to decrease until total LSSR phase 3 (24 May 2020). Furthermore, the temperature began to increase when LSSR transitional period reached phase 1 (13 September 2020). This study reveals the possibility of utilizing satellite images to monitor environment due to changes in human activities. Keywords: Covid-19- Large-scale social restrictions- Jabodetabek- Landsat Imagery- Remote Sensing Share Link | Plain Format | Corresponding Author (Yuli Priyana)

149	Engineering	ABS-71
Development of Bamboo Materials for Body Speed Boat Application Andi Lamappasessu (a), Dwi Rahmalina (a*) a) Department of Mechanical Engineering, Faculty of Engineering, Universitas Pancasila *drahmalina[at]univpancasila.ac.id Abstract The research of natural fibers in various engineering fields is currently developing, because of its availability, easy to process according to its designation, low-cost, good mechanical and physical properties and is friendly to the environment. The use of bamboo (bamboo strip reinforced / BSR) material with a laminate system, for the manufacture of speed boats is a promising alternative material. The bamboo used is the Andong Bamboo (Gigantochloa pseudoarundinacea) for the manufacture of its skin, the bamboo material is widely available in Indonesia. To ensure that the bamboo material used can meet the requirements of mechanical properties as a material for making Speed Boats with Hand Lay Up Laminate system and a Composite system, an analysis is carried out on the results of testing tensile strength, bending strength, modulus of elasticity and specific gravity of the materials. There are Fibreglass Reinforced Polymer (FRP), Fibre Bamboo Reinforced Polymer (FBR), Bamboo Strip Reinforced for Outer Part (BSR-OP), and Bamboo Strip Reinforced for Middle Part (BSR-MP). The next step is to compare the results of the tensile strength, bending strength, modulus of elasticity and specific gravity of the bamboo raw material to the Fiberglass Reinforced Polymer (FRP) composite material. As the standards used for tensile, bending, elastic modulus and material density tests are the Rules for Fiberglass Reinforced Plastic Ship 2016 and the BKI Regulation, the 2016 Regulations for Classification and Construction of Wooden Ships set by the Indonesian Classification Bureau for Speed Boat building materials, ISO 527-4 and ISO 14125. From the test results, the type of material that has the best mechanical characteristics will be selected to be used as an alternative raw material for shipbuilding/speed boat, will be a source of information for the preparation of rules related to shipbuilding/speed boot from bamboo material. Keywords: Bamboo, composite, body speed boat Share Link | Plain Format | Corresponding Author (Dwi Rahmalina)

150	Engineering	ABS-328
The importance of gamification to increase public participation in waste management system Pristi Sukmasetya- Muhammad Resa Arif Yudianto- Rofi Abul Hasani Universitas Muhammadiyah Magelang Abstract The community has not optimally implemented the Zero Waste concept that applies the 3R principles (Reduce, Reuse, Recycle) and to implement the 3R principles, so it is necessary to have policies that are carried out from upstream to downstream. In this case, the community assists the government with a waste bank program to reduce the impact of waste. Currently, technology is believed to help facilitate waste management. The approach used in this study is the Soft system methodology and the gamification approach. Gamification is using game design techniques, game thinking, and mechanics to enhance non-game contexts. Usually, gamification applies to non-gaming applications and processes to encourage people to adopt or influence how they are used. From this research, 3 gamification models can be applied 1) gamification by request, quest, and particular order. Apart from using this method, this research will still be supported by other approaches, such as Focus Group Discussion (FGD) and Participatory Observation. This research produces a model strategy for waste bank customers, managers, facilitators, and the Environmental Service by adopting gamification techniques. In addition, a system prototype was also obtained that could be implemented and tested. The test results got positive responses from 12 respondents to carry out tests with scores above 50% success on the prototype test for the waste management system that has been made. Keywords: Gamification- Waste Management System- Soft System Methodology Share Link | Plain Format | Corresponding Author (Pristi Sukmasetya)

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