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All Journal Jurnal Infinity SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin AGROSCIENCE Abdimas Galuh: Jurnal Pengabdian Kepada Masyarakat BERNAS: Jurnal Pengabdian Kepada Masyarakat Unram Journal of Community Service (UJCS) Journal of Mechanical and Manufacture J-ENSITEC (Journal of Engineering and Sustainable Technology) Greenation International Journal of Engineering Science Greenation International Journal of Engineering Science SEMINAR TEKNOLOGI MAJALENGKA (STIMA) International Journal of Applied Information Systems and Informatics
Koswara, Engkos
Universitas Majalengka
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STRATEGI PQ4R UNTUK MENGEMBANGKAN KEMAMPUAN KOMUNIKASI MATEMATIK DAN KEMANDIRIAN BELAJAR SISWA SMP Koswara, Engkos; Hendriana, Heris
Jurnal Infinity Vol 4, No 2 (2015): Jurnal Infinity Vol 4 No 2, September 2015
Publisher : Program Studi Pendidikan Matematika STKIP Siliwangi Bandung

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ABSTRAK Penelitian ini ditujukan untuk menelaah peranan strategi PQ4R terhadap kemampuan komunikasi dan kemandirian belajar  siswa SMP,  serta asosiasi antara keduanya. Penelitian ini adalah bagian dari tesis magister dan bagian dari Penelitian Hibah Pascasarjana DIKTI pada tahun 2015. Studi ini adalah suatu quasi eksperimen dengan disain pretest-postes kelompok kontrol yang melibatkan 66 siswa kelas 8 dari satu  SMP di Karawang yang ditetapkan secara acak. Instrumen penelitian ini adalah tes uraian kemampuan komunikasi matematik, dan skala kemandirian belajar, dan skala persepsi siswa terhadap strategi PQ4R. Studi menemukan kemampuan komunikasi matematik siswa yang mendapat strategi PQ4R lebih baik daripada siswa yang mendapat pembelajaran konvensional, dan kemampuan komunikasi itu tergolong sedang. Siswa mash mengalami kesulitan dalam membuat model matematik dan menyelesaikannya berkenaan sistim persamaan linier dua dan tiga variabel. Namun, tidak terdapat perbedaan kemandirian belajar siswa pada kedua pembelajaran tersebut.  Selain itu ditemukan pula tidak terdapat asosiasi antara kemampuan komunikasi  matematik dan kemandirian belajar. Kata Kunci    :   komunikasi matematik, kemandirian belajar, strategi PQ4R  ABSTRACT This study was intended to analyze the role of PQ4R strategy toward students’ mathematical communication ability and self regulated learning (SRL). This study was a part of a master thesis and a sub-study of a Postgraduate Research Grant from DGHE in 2015. This study was a pretest-postest quasi-experimental control group design involving  80 tenth-grade students of  a yunior high school in Karawang which were chosen randomly.The instruments of this study are an essay test on mathematical communication ability, and a mathematical self regulation learning (SRL) scale. The study revealed that students getting treatment on PQ4R attained better grades on mathematical communication ability than students taught by conventional teaching, though the grades were at medium level. Students realized difficulties in compiling mathematical model and solving it of linier equation system of two and three variables. However, there was no difference in grades of self regulated learning between students in the two groups and the grades were fairly good. Also, there was  association between mathematical communication  ability and self regulated learning. Keywords:            mathematical communication, self regulated learning, PQ4R
CENTER OF MASS (CENTROID) ANALYSIS ON ATV (ALL TERRAIN VEHICLE) TYPE ROKETS WIMCYCLE 110 CC Panca Suwanda, Aggy; Rachmat, Asep; Koswara, Engkos
Jurnal Mekanika dan Manufaktur Vol 1 No 1 (2021)
Publisher : Universitas Majalengka

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In an ATV (All Terrain Vehicle) vehicle, the center of gravity is the point at which the vehicle will be in equilibrium. When the vehicle experiences translational and rotational motion at the same time, then at that time The center of gravity will act as the axis of rotation and the trajectory of motion, from the center of gravity This describes the trajectory of the translational motion. The center of gravity is a point of perfect balance or a center distribution of weight. At this point the gravitational force acts, for objects that are have any shape location center of gravity is searched by calculations, calculations are based on the assumption that we can take some points of the object you want to calculate the center of gravity multiplied by the weight at each point then add up and divide by the total weight at each point. It is said that the center of gravity is also the center of mass near the earth's surface, but for a certain height above the earth center of gravity and center of gravity must be distinguished. The distance from the center of mass when viewed from the side view is 0.42 m from the front axle and 0.48 m from the rear axle. The center of mass distance from the rear view is 0.35 m from the right wheel axis and 0.35 m from the left wheel. The height of the center of mass from the axis of the wheel axle is 0,39 m.
STRENGTH ANALYSIS OF SELIS BRAND ELECTRIC BIKE FRAME THUNDER TYPE BMX 350 WATT USING ANSYS V17 SOFTWARE Ruyanto, Ruyanto; Samantha, Yudi; Koswara, Engkos
Jurnal Mekanika dan Manufaktur Vol 1 No 1 (2021)
Publisher : Universitas Majalengka

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Frame is one important component of the electric bicycle because it serves as the supporting components are installed, so that it becomes a unity that makes electric bikes can run. For static stress analysis was performed on an electric bicycle frame brands Selis thunder type 350 watts using ANSYS software V17 with amaximum static load of 1,200 kg. The purpose of this study was to determine the strength that is capable detained by order so that an unknown number of safety.After testing obtained amounted to 413.73 MPa maximum stress, maximum strain of 20.687x10-4 mm/mm , total maximum deformation of 95.99x10-2 mm and the safety factor at 0.6042.
Reconditioning Load Cell Tensile Testing Machine Capacity 2 Ton Tarsudin, Tarsudin; Koswara, Engkos; Rachmat, Asep
Jurnal Mekanika dan Manufaktur Vol 1 No 2 (2022)
Publisher : Universitas Majalengka

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Test equipment is an educational laboratory facility that is very important in supporting and supporting the teaching and learning process in the laboratory. , load cell is an electronic device that is used as an additional device in a tensile testing machine. The tensile test results will be better or more accurate if the tensile test equipment is equipped with a load cell using a data device system. Obtained from this test, namely the stress value that occurs in the load cell, the stress on the ST37 steel specimen is 48.56 kg/mm², the maximum stress is 952.99 kg/mm². While the stress on the 6061 aluminum specimen is 15.6 kg/mm², and the maximum stress is 306.15 kg/mm². In addition to the workpiece that breaks due to tension, a tensile test curve is also generated. This curve is a description of the workpiece loading process from the beginning of the withdrawal to the end of the workpiece.
THE TORQUE TEST SPECIMENS ANALYSIS USING FINITE ELEMENT ANALYSIS Riyadi, Slamet; Setiawan, Tia; Koswara, Engkos
Jurnal Mekanika dan Manufaktur Vol 1 No 2 (2022)
Publisher : Universitas Majalengka

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The industrial component of industrial equipment is required to have good quality. The elementsor components of a tool must be light but have strong and corrosion-resistant alloys. Testing ofthe materials to be used must be appropriate and in accordance with the needs. There are severalways, one of which is by using a torque testing machine and Finite Element Analysis (FEA). FiniteElement Method (FEM) or commonly called Finite Element Analysis (FEA), is a numericalprocedure that can be used to solve certain engineering problems. Modeling torsion test objectsusing the FEM with a moment 598.0635 N mm, - 598.0635 N mm with respect to vector Xcounterclockwise. The material used is ASTM A 36 with a mass of 0.0163569 kg and a volume of2083.94 mm^3, torsion test analysis using finite element-based software. Based on thesimulation results, it can be seen that the largest stress (maximum stress) occurs in the XZ vectorwith a value of 10.4783 MPa, while the smallest stress (minimum stress) occurs towards the YZvector with a value of 0.15986 MPa. The largest strain (maximum strain) occurred in vector XZwith a value of 0.000068123 ul, while the smallest strain (minimum strain) occurred in vector XXwith a value of 0.00000107672 ul. The safety factor obtained is 0.71, meaning that the value isless than equal to 1 which indicates that the test object is unable to accept the given load.
COMMISIONING AND FAT HVAC FOR OFFSHORE ON THE KLA FLOW STATION Firdaus, Yusup; Koswara, Engkos
Jurnal Mekanika dan Manufaktur Vol 2 No 1 (2022)
Publisher : Universitas Majalengka

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HVAC stands for Heating Ventilation Air Conditioning, in the industrial world it is very necessary to condition a room according to its needs, it can be used to regulate a room or freeze a product, the selection of HVAC materials for Offshore is very important so that the unit lasts a long time and does not rust easily. The importance of selecting materials that are in accordance with the provisions in terms of safety, function and quality, materials that are easy to obtain, sizes according to calculations, aesthetics, and materials that are not easy to rust. commissioning is done because to determine the quality and function of the HVAC unit whether it is in accordance with the design, function or calculation
ANALYSIS OF CUSTOMER SATISFACTION ON THE QUALITY OF PURPLE PATTOM CRUISER USING IMPORTANCE PERFORMANCE ANALYSIS (IPA) METHOD Whydiantoro, Whydiantoro; Budiman, Budiman; Koswara, Engkos; Kusumadewi, Intan
Jurnal Mekanika dan Manufaktur Vol 2 No 1 (2022)
Publisher : Universitas Majalengka

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Following up on PKM on purple sweet potato crackers in Padahanten village and seeing the current very rapid development of the service business, with the growth of the service business in Indonesia this has resulted in higher competition, consumers are more selective in buying and choosing the products they need. Therefore, purple sweet potato chips must be able to meet consumer needs. Products that are able to win the competition with competitors need a strategy that can improve services and be able to compete effectively in this increasingly competitive market. Win the competition and keep the business alive, growing and getting as many customers as possible. This can be said to be successful if consumers are satisfied with the performance of a product or service provided by the entrepreneur. According to Lewis & Booms, in Service Management by Fandy Tjiptono (2016) Service quality is defined as a measure of how large the level of service that can be provided in accordance with the level of consumer expectations. In other words, the factors that affect the quality of service are the services expected by consumers, if the service exceeds what is expected by consumers, the quality of service can be said to be good (positive), and vice versa if the service is not in accordance with what is expected by consumers, it can be said that the quality of service is bad. (negative value) Quadrant analysis or Importance Performance Analysis (IPA) is a descriptive analysis technique introduced by John A. Martilla and John C. James (1977) cited by Tjiptono and Chandra (2016: 222-223). Importance Performance Analysis (IPA) is an analytical technique used to identify what important performance factors must be demonstrated by an organization in meeting the satisfaction of their service users (consumers). Therefore, it is necessary to conduct research on the analysis of consumer satisfaction on the quality of service in the marketing of purple sweet potato crackers by using the Importance Performance Analysis (IPA) method. and promotions. Through these (4P's) attributes, it will be known what influences consumers' desire to visit Padahanten purple sweet potato. The variables that are traced or researched are aspects of reliability (reliability), responsiveness (response), tangible (tangible), assurances (certainty), and empathy (empathy).
ANALYSIS OF STEAM POWER PLANT RANKINE CYCLE EFFICIENCY ANALYSIS AT PT. PG RAJAWALI II JATITUJUH UNIT Zauhari, Azi; Koswara, Engkos; Rachmat, Asep
Jurnal Mekanika dan Manufaktur Vol 2 No 1 (2022)
Publisher : Universitas Majalengka

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Rankine cycle efficiency and rankine cycle work process at PT. PG Rajawali II Jati Tujuh Unit Adding knowledge to students about Rankine cycle in steam power generation system. To determine efficiency based on operational data. To know and understand the process of the Rankine cycle. It can be a reference and input for PT, PG Rajawali II Unit Jati Tujuh to see its efficiency. Before going into the field, we must prepare our theory according to the title such as boiler, turbine, condenser, pump example. This is a direct observation of the conditions at PT. PG Rajawali II Unit Jati Tujuh. This step is carried out to find out information about the conditions in the field and the situation where the practical work is carried out. Fractional pressure will not occur in the boiler and condenser, if the working fluid flows through the various components of a simple steam power cycle without irreversibility, and the working fluid will flow through the components at constant pressure. Dry water vapor from the boiler enters the turbine and undergoes a process isentropic expansion of the energy stored in the water vapor is converted into motion energy in the turbine. The water vapor is converted into liquid again so that it can be reused in the cycle process, PT. PG Rajawali II Unit Jati Tujuh on October 11, 2020 had the highest efficiency of 25.20%. October 22, 2020 has the lowest efficiency, which is 22.99%. Before going to the work process of the Rankine cycle, we must really understand the components related to the Rankine cycle, starting from the boiler, turbine, condenser, and pump so that we can understand and understand what the Rankine cycle is. In processing data using a help system, namely with Microsoft Excel with engineering applications, we have to ask those who know better so that in processing data with Microsoft Excel it can be actually clear in calculating it to get the values of pressure and temperature and their efficiency.
MODIFICATION OF THE DUST COLLECTOR TOOL ON A 3 AXIS CNC ROUTER MACHINE FOR WOOD WORKING Yahya, Ahmad; Koswara, Engkos; Rachmat, Asep; Dewi Jannati, Eidelweis
Jurnal Mekanika dan Manufaktur Vol 2 No 2 (2023)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jmm.v2i2.5306

Abstract

Based on the results of research in Majalengka Regency, it was found that there were 200 semi-finished wood processing secondary industries, spread over 26 sub-districts with the type of wood used being dominated by teak, mahogany, these types of wood are used for semi-finished materials in the form of frames, doors, windows, cabinets, sideboard and chairs. There is also production of wood that is native to Indonesia, namely wood carving. Wood carving has its own uniqueness because it is a human creation based on an aesthetic sense according to what the human himself wants. Wood carving works of art are usually created using sculpting techniques. The creation of works of wood carving with the arrangement of elements so that meaningful elements are formed and one must have creative sculpting skills to produce works that are good, attractive and have meaning and high aesthetic value as well as being useful in people's lives.
SOSIALISASI SISTEM FILTRASI AIR SUNGAI UNTUK KEBUTUHAN MUSHOLA DI DESA CIPAKU Rijaluddin, Arief; Susandi, Dony; Koswara, Engkos; Sujadi, Harun; Budiman; Whydiantoro; Hendrayana, Yayat; Ariandoyo, Dodi
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 1 (2025)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jb.v6i1.11966

Abstract

Kebutuhan akan air bersih, merupakan kebutuhan yang sangat penting selama manusia hidup di muka bumi ini, sementara itu sumber air bersih semakin berkurang, oleh karena itu diperlukan suatu usaha yang baik agar kebutuhan akan air bersih bisa tersedia, baik dengan cara pemeliharaan hutan, pembuatan sumur resapan ataupun hal lain yang dapat dilakuakan, sehingga masyarakat luas baik perorangan ataupun lembaga bisa terpenuhi kebutuhannnya, apalagi seperti mushola yang membutuhkan air untuk kebutuhan berwudhu dan sebagainya, sehingga kebutuhan air menjadi sangatlah mutlak.  Sebagian besar wilayah pedesaan mungkin tidak memiliki akses mudah ke sumber air bersih yang aman. Air yang diambil dari sumur, sungai, atau mata air seringkali dapat terkontaminasi oleh bakteri, parasit, atau bahan kimia berbahaya. Oleh karena itu, filtrasi air diperlukan untuk memastikan ketersediaan air bersih yang aman untuk diminum dan digunakan dalam kehidupan sehari-hari. Tidak terkecuali untuk sarana ibadah, dimana memerlukan untuk kebutuhan wudhu setiap jamaah yang ada di sarana ibadah tersebut
Co-Authors Abdullah, Fatwa Muhammad Maulid Ade Bastian Adiyanto Pratama, Sandy Agung Dwi Haryanto, Totok Agus Yuniawan Isyanto Ahmad Fudholi Ahmad Yahya Amalia, Lidya Nur Ardi Mardiana Ariandoyo, Dodi Arief Rijaluddin Asep Rachmat, Asep Budiman Budiman Budiman Dewi Jannati, Eidelwei Dewi Jannati, Eidelweis Dony Susandi Fadhlurrahman, Azhar Fadilah, Fadil Faqih, Reynanda Maulana Yusuf Febriyanto, Muhammad Rival Firdaus, Yusup Harti, Adi Oksifa Rahma Harun Sujadi Heris Hendriana Hidayat, Adam Ida Ayu Putu Sri Widnyani Ida Marina, Ida Ilham Adhya Indriana, Kovertina Rakhmi ISMAIL, AGUS YADI Kusumadewi, Intan Mardina, Ardi Muhammad Rifki Muhammad Setiyo Surya Darma Nasim, Nasim Panca Suwanda, Aggy Rif'an, Muhammad Riza M. Yunus Rohendi, Muhamad Ruyanto, Ruyanto Sakhidin Sakhidin Saputra, Theo Chandra Setiawan, Tia Setyawan, Azis Budi Slamet Riyadi Subandi, Dipa Subhi, Ibnu Sumirat, Perly Tarsudin, Tarsudin Wahidin, Dendi warandi , rofandi Rori Aditiar Warandi, Rofandi Rori Aditiar Whydiantoro Whydiantoro, Whydiantoro Yayat Hendrayana, Yayat Yudi Samantha, Yudi Zauhari, Azi