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<![CDATA[Durability of Asphalt Mixture AC-WC Using Latex Based on the Test Method of SNI 6753:2015 ]]>
<![CDATA[Sri Sunarjono]]>;
<![CDATA[Bima Hardi Anto]]>;
<![CDATA[Nurul Hidayati]]>;
<![CDATA[Senja Rum Harnaeni]]>
<![CDATA[ Urecol Journal. Part E: Engineering Vol. 1 No. 2 (2021): August-Dec ]]>
Publisher : <![CDATA[Konsorsium LPPM Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY ]]>
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DOI: 10.53017/uje.105
<![CDATA[This paper reports the results of an investigation of the durability of the AC-WC mixture using latex based on the SNI 6753:2015 test method. This method uses a test object with a low density (7% air void), while another method, namely Bina Marga (BM) 2018 which is more often applied in the field, uses a normal density test object (air void 4%). The product of these two different methods needs to be evaluated. On the other hand, the performance of latex on the durability of the AC-WC mixture at low density also needs to be studied. The main objective of the research is to study the durability of the AC-WC mixture using latex based on the SNI test method, compare it with the BM method, and at the same time evaluate these two test methods. The research method used is to conduct durability tests in the laboratory on test objects with low and normal densities. Two types of specimens were prepared, namely without and with latex, both were tested in conditions without and with immersion. The properties of the test object were evaluated using Indirect Tensile Strength (ITS). The test results were studied and compared, including to evaluate the two test methods. The results of the study concluded that the AC-WC mixture at low density (7% air void) had high durability with an IKS value above 90%. The value of the durability of the mixture is higher when using latex and at normal density (4% air void). The SNI 6753:2015 test method that uses 7% air void specimens is more recommended for evaluating the durability of asphalt mixtures.]]>
<![CDATA[Vertical Wind Turbine Coupled with Modified Synchronous Generator for Portable Power Generation ]]>
<![CDATA[Agus Ulinuha]]>;
<![CDATA[M. Burhanduin Ubaidillah]]>
<![CDATA[ Urecol Journal. Part E: Engineering Vol. 1 No. 2 (2021): August-Dec ]]>
Publisher : <![CDATA[Konsorsium LPPM Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY ]]>
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DOI: 10.53017/uje.106
<![CDATA[Coastal region normally has sufficient wind power that has not been properly utilized. On the other hand, some places in this region do not have electricity supply from the utility due to some reason. People activity in these areas may need some electricity at least for lighting the area in the evening. For the purpose of generating electricity, a portable power generation is developed to use the wind power and used to supply the power for the light. Wind power plants have so far used propellers with horizontal configurations. In this model, the blades used in propellers have limited dimensions due to mechanical considerations. In addition, the direction of the propeller needs to be directed toward the wind flow, so that a steering wheel and a rotating base are required. To overcome this problem, it is necessary to utilize a number of wind impulse blades placed on the vertical axis. In addition to the expectation to obtain greater thrust, no mechanical equipment is necesary to direct the turbine toward the direction of wind flow. These advantages are expected to increase the output voltage of the generator coupled to it. The generator used in this research is a modified induction motor with some additional magnetic poles to become synchronous generator. The generated power is used to charge a battery which is used to power the light at the night. Small scale generator prototype was developed and tested for coastal locations or other open spaces to obtain wind flow with sufficient power to drive turbine blades.]]>
<![CDATA[Economic Evaluation of Cobalt Ferrite (CoFe2O4) Nanoparticles Using Thermal Decomposition Synthesis Method ]]>
<![CDATA[Sadina Sahitya Dewi]]>;
<![CDATA[Wafa Raihanah Arwa]]>;
<![CDATA[Dewi Yulina Nur Soleha]]>;
<![CDATA[Silmi Ridwan Putri]]>;
<![CDATA[Asep Bayu Dani Nandiyanto]]>
<![CDATA[ Urecol Journal. Part E: Engineering Vol. 1 No. 2 (2021): August-Dec ]]>
Publisher : <![CDATA[Konsorsium LPPM Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY ]]>
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DOI: 10.53017/uje.109
<![CDATA[The purpose of this study was to determine the technical and economic feasibility of a project to manufacture CoFe2O4 nanoparticles using the thermal decomposition synthesis method on an industrial scale. The method used in economic evaluation is to compare several parameters such as gross profile margin (GPM), payback period (PBP), breakeven points (BEP), internal rate return (IRR), cumulative net present value (CNPV), return on investment (ROI), and profitability index (PI). The results show that the production of CoFe2O4 nanoparticles is profitable on an industrial scale with a relatively lower selling price than the market price and a relatively small size. This project can run within nine years and the investment will be profitable within 2 years according to PBP results.]]>
<![CDATA[Chemical Characteristics of Surface Water of Sumpil River and Groundwater on its Surroundings ]]>
<![CDATA[Mukhlis Arief Irvandi]]>;
<![CDATA[Hari Siswoyo]]>;
<![CDATA[Dasapta Erwin Irawan]]>
<![CDATA[ Urecol Journal. Part E: Engineering Vol. 2 No. 1 (2022): January-June ]]>
Publisher : <![CDATA[Konsorsium LPPM Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY ]]>
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DOI: 10.53017/uje.137
<![CDATA[The objective of this study was to know the chemical characteristics of surface water in a segment of Sumpil River and the groundwater on its surrounding. The location of this study was in 3 cross sections, consisting of 1 well on the right of the Sumpil River, 1 well on the left of the Sumpil River flow, and 1 point on the Sumpil River flow. The chemical characteristics of the water were determined by the concentrations of cations and anions in the water sample using the Piper Trilinear Diagram with the GW Chart 1.30 computer program. Based on the results of the study, it was shown that the chemical characteristics of the Sumpil River water and the groundwater at the location of this study were the same, where all water samples had an alkaline earth metals content over the alkali content (zone 1), had a strong acidic content exceeding the weak acidic content (zone 4), have a balanced cation and anion pairs, none of which exceed 50% (zone 9), and shown that all of the water in the location of this study were fresh water.]]>
<![CDATA[Implementation of Palm Oil Waste Nano Technology to Increase the Durability of Road Pavement Materials: Proposed Research Roadmap ]]>
<![CDATA[Sri Sunarjono]]>;
<![CDATA[Ngafwan]]>
<![CDATA[ Urecol Journal. Part E: Engineering Vol. 2 No. 1 (2022): January-June ]]>
Publisher : <![CDATA[Konsorsium LPPM Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY ]]>
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DOI: 10.53017/uje.138
<![CDATA[Many road pavements using asphalt mixtures in Indonesia are found to be not durable, especially heavy traffic roads. Even road damage often occurs early before the service life is reached. Many efforts have been made to improve the strength and durability of the mixture, but have not been effectively. For example, the use of fillers can increase the strength and durability of the mixture significantly, but its performance at low temperatures has an impact on the risk of hardening and cracking. The research objective is to propose the idea of implementing nanotechnology for palm oil waste materials to increase the durability of road pavement materials based on the research roadmap developed. The method used is through five approaches, namely: (i) review of research results on the durability of road pavement materials, (ii) review of research results on the implementation of nanotechnology in road pavement materials, (iii) research gaps, (iv) research ideas, and, (v) proposed research roadmap. A research roadmap for the implementation of nanotechnology to improve the durability of road pavement materials has been prepared. The substance of the research roadmap proposes three ideas, namely maximizing the function of nanomaterials as: (i) anti-aging agent, (ii) protecting water infiltration into the body of the asphalt mixture, and (iii) bonding agent between asphalt-aggregate.]]>
<![CDATA[Design and Implementation of Automatic Switching for Water Level Control of Community Water Supply ]]>
<![CDATA[Agus Ulinuha]]>;
<![CDATA[M. Rusdi Wibowo]]>
<![CDATA[ Urecol Journal. Part E: Engineering Vol. 2 No. 1 (2022): January-June ]]>
Publisher : <![CDATA[Konsorsium LPPM Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY ]]>
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DOI: 10.53017/uje.140
<![CDATA[This paper presents design and implementation of Automatic Switching for controlling the water level in the reservoir of community water supply. The water supply system is energized by 2 sources i.e. power from utility grid and power generated by photovoltaic panels equipped with energy storage. The switching is based on the reservoir water level and determines the operation of submersible pump. The switching system employs electrode sensors in the water control level where 3 conditions are considered to control motor that drives the pump. The Automatic Switching is connected to Automatic Transfer Switch (ATS) that selects power sources to energize the pump, where it may be from the solar PV supported by storage system or from the grid. The selection is based on the remaining energy saved in the storage, when it is sufficient then it is used to energize the pump. Otherwise, the power from the grid is used to supply the pump. The combination of Automatic Switching and ATS determines when the pump is on and which power is taken to supply the pump. The manual system is complemented in the switching system to enable manual operation when the automatic system fails to work for some reason. The whole system is developed in a panel for easy operation and monitoring. The water level indicator is given in the panel for the purpose of adjusting the pump operation based on water level in the reservoir.]]>
<![CDATA[SISENSI: QR Code-based Academic Attendace System ]]>
<![CDATA[Arif Setiawan]]>;
<![CDATA[Dwi Nur Fitria Agustin Rahayu]]>
<![CDATA[ Urecol Journal. Part E: Engineering Vol. 2 No. 1 (2022): January-June ]]>
Publisher : <![CDATA[Konsorsium LPPM Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY ]]>
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DOI: 10.53017/uje.141
<![CDATA[Presence is something that cannot be separated from the learning process, it becomes motivation and discipline information for every activity in it. This study aims to develop a QR Code-based academic attendance application that can be used by Informatics Engineering Education students. The research method used is R&D (Research and Development) using the RAD (Rapid application development) development model. Application development made using Kodular and Moodle. This application contains a QR Code scan menu as the main focus in this media as well as other supporting menus in the form of virtual tours, news, timetables, and UMS stars. In the process of developing this application, several tests were carried out, namely functionality testing using blackbox, usability testing using the SUS (system usability scale) instrument, reliability testing and application compatibility testing using the firebase test lab. used based on the validation carried out by experts as many as three experts from Informatics Engineering Education lecturers and trials given to users as many as thirty-five students from the Informatics Engineering Education study program, it can be said that the application is suitable for use by Informatics Engineering Education students.]]>
<![CDATA[Implementation of the Code Igniter Framework in the Online New Student Admission Application at SMK Muhammadiyah 2 Mertoyudan Magelang ]]>
<![CDATA[Andre Saputro]]>;
<![CDATA[Nuryanto]]>;
<![CDATA[Ardhin Primadewi]]>
<![CDATA[ Urecol Journal. Part E: Engineering Vol. 2 No. 1 (2022): January-June ]]>
Publisher : <![CDATA[Konsorsium LPPM Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY ]]>
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DOI: 10.53017/uje.143
<![CDATA[Student admission is one of the processes that exist in educational institutions. Schools accept students by selecting grades, achievements, and other factors. SMK Muhammadiyah 2 Mertoyudan located in Magelang Regency conducts semi-manual PPDB by compiling ledger records and spreadsheets. The school has difficulty getting PPDB historical data and PPDB reporting. Besides the CPDB has difficulty monitoring registration data directly. The PPDB application is developed with the Code Igniter framework with main features that can be accessed by 3 actors (PPDB manager, CPDB and admin). Applications can store historical data, provide convenience with all forms of custom PPDB reporting and can be accessed online by CPDB and CPDB trustees. From the results of the user acceptance test carried out on schools and CPDB, an assessment of 84.8% was obtained which showed that respondents were satisfied with the functionality of the online PPDB application.]]>
<![CDATA[Application of the C4.5 Algorithm for Early Cervical Cancer Classification ]]>
<![CDATA[Taftazani Ghazi Pratama]]>;
<![CDATA[Achmad Ridwan]]>;
<![CDATA[Agung Prihandono]]>
<![CDATA[ Urecol Journal. Part E: Engineering Vol. 1 No. 1 (2021): January - June ]]>
Publisher : <![CDATA[Konsorsium LPPM Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY ]]>
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DOI: 10.53017/uje.4
<![CDATA[Cervical cancer is one of the cancers that is of global concern because of the high mortality rate in women. Preventive measures such as early detection are needed so that patients can get treatment more quickly. Fortunately, this disease can be prevented with the role of technology to help doctors in early detection of various types of cancer. The technology developed by the researchers is using machine learning algorithms. Therefore, in this study using the C4.5 algorithm to classify cervical cancer. This algorithm aims to classify 2 classes: people who have cervical cancer, people who are healthy. The results of the experiment obtained from the C4.5 algorithm are getting an accuracy of 98.61%, precision of 98.08%, and recall of 95.24% ROC curve shows 0.982%.]]>
<![CDATA[The Effect of Wind Speed on the Thermal Sensation in the Siti Walidah Building (Non-AC Area) ]]>
<![CDATA[Muhammad Unggul Muhajiri Rahimi]]>;
<![CDATA[Nur Rahmawati Syamsiyah]]>;
<![CDATA[Muhammad Siam Priyono Nugroho]]>
<![CDATA[ Urecol Journal. Part E: Engineering Vol. 1 No. 1 (2021): January - June ]]>
Publisher : <![CDATA[Konsorsium LPPM Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY ]]>
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DOI: 10.53017/uje.6
<![CDATA[Thermal comfort is a necessity for an activity in a room, one of the parameters is wind speed. Wind speed is the speed of air flowing horizontally and vertically at an altitude above the ground. Wind speed is influenced by differences in temperature and air pressure as well as the characteristics of the surface on which it passes. Meanwhile, air that does not move in a closed room will cause the room user to feel uncomfortable. In this study, the object used is the Siti Walidah building, which is the main building, and is one of the service buildings belonging to the Muhammadiyah University of Surakarta. The object selection is based on the circular mosque shape, which is thought to affect the wind movement pattern. The purpose of this study was to determine the wind speed and the level of comfort of building users to the wind speed on each floor, especially in non-ac areas. The research method used is a quantitative approach with measurement and qualitative descriptive analysis, namely the interpretation of data because of observations, analysis with the surfer mapping program and interviews. This study also uses the SNI 03-6572-2001 reference. The results showed that the maximum comfort for users was felt only on the second floor with an average wind speed of 0.630 m/s in the morning and 1.139 m/s during the day. While the other floors have an average wind speed of below 0.25 m/s, which indicates that the wind category cannot be felt by the user.]]>
