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"Vol 7, No 2 (2021): Jurnal Teknologi Terapan"
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<![CDATA[ANALISA KUALITAS HASIL PRODUK PADA PENGERJAAN POCKETING DENGAN MESIN CNC FRAIS 3 AXIS ]]>
<![CDATA[Irfan Santosa]]>;
<![CDATA[Siswiyanti Siswiyanti]]>;
<![CDATA[Muhammad Nur Alif]]>
<![CDATA[ Jurnal Teknologi Terapan Vol 7, No 2 (2021): Jurnal Teknologi Terapan ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Indramayu ]]>
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DOI: 10.31884/jtt.v7i2.324
<![CDATA[The manufacturing industry sector is experiencing increasing development. Especially CNC-based machines and the demands of consumers who want good workpiece quality, precision/accuracy of workpiece dimensions and roughness values are the main elements in the machining process. This study uses an experimental method, namely to determine the quality of the product (dimensions, time, geometry and roughness of the workpiece) in pocket work using a 3 axis CNC Milling Microcontroller Match 3 machine for the manufacture of aluminum ashtray products. For the parameters used, it uses a cutting speed of 150 mm/minute, a cutting depth of 0.5 mm with a Spindle rotation speed of 10,000 RPM. The results of this study can be seen in the aluminum ashtray product, the processing time is 1098 minutes, while the dimensions of the workpiece have an average tolerance of 0.28 mm and for the average roughness value N7 = 2.1 µm and it can be classified that the quality of the products made by the CNC Milling Machine 3 axis Microcontroller Match 3 in standard category for tolerance category and roughness value.]]>
<![CDATA[ANALISIS SENTIMEN PADA TWEET TERKAIT VAKSIN COVID-19 MENGGUNAKAN METODE SUPPORT VECTOR MACHINE ]]>
<![CDATA[Hashri Hayati]]>;
<![CDATA[Muhammad Riza Alifi]]>
<![CDATA[ Jurnal Teknologi Terapan Vol 7, No 2 (2021): Jurnal Teknologi Terapan ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Indramayu ]]>
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DOI: 10.31884/jtt.v7i2.349
<![CDATA[Covid-19 is a disease that has been declared a global pandemic since March 2020. One of the challenges in dealing with the current Covid-19 pandemic is the widespread doubts about the use of vaccines, even though vaccination is one of the most successful ways to deal with infectious disease outbreaks. Vaccine hesitancy can be observed, among others, from public sentiment or perception on social media, one of them is Twitter. The existence of social media can affect the absorption of information received by a person, in this case social media is also a medium for anti-vaccine propaganda which can result in a decrease in public confidence in the Covid-19 vaccine. This study aims to develop a classification model using the Support Vector Machine (SVM) method for sentiment analysis of Tweet related to the Covid-19 vaccine. Several previous studies have conducted sentiment analysis related to Covid-19, but this research specifically conducts sentiment analysis on the topic of the Covid-19 vaccine so that data preparation and model configuration will be different. This study also uses the Design Science Research Methodology (DSRM) for research as a whole before focusing on the use of the SVM method. The results of the study consist of an algorithm for creating data sets and a classification model for sentiment analysis that can be used to determine public perceptions of the issue of Covid-19 vaccination. This study also compares the use of unigram and bigram tokenization. Based on the results obtained, the average value of each aspect of the evaluation measurement is higher when the bigram tokenization is used. Although higher, the value obtained has an insignificant difference in the range of 0.6% - 0.7%. In the evaluation results using unigram and bigram tokenization, the highest scores for all aspects of measurement, namely accuracy, recall, f-measure, and precision were 84%.]]>
<![CDATA[DESAIN DAN SIMULASI SOCKET PROSTESIS BAWAH LUTUT DENGAN VARIASI MATERIAL BERBASIS KOMPOSIT ]]>
<![CDATA[Luthfi Ali Masykur]]>;
<![CDATA[Donny Suryawan]]>
<![CDATA[ Jurnal Teknologi Terapan Vol 7, No 2 (2021): Jurnal Teknologi Terapan ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Indramayu ]]>
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DOI: 10.31884/jtt.v7i2.337
<![CDATA[Each year, the number of disabled people in Indonesia increases. About 2.4 million people had some trouble walking in 2014. It includes 650,000 individuals who have significant difficulty walking and ascending stairs. Lower limb prostheses are an option for those who are unable to walk due to leg amputation. One of the most necessary parts of the below-knee prosthesis is the socket. Almost the local prosthetics socket did not give adequate information about the specification. It is a weakness of the local product because there is no guarantee of product safety. The lack of references and standards makes it difficult for manufacturers to improve their products to compete with imported products. This research is focused on the design and simulation of prosthesis sockets with various composite-based materials. The simulation method was adapted from ISO 10328 standard as the testing standard for prosthetics foot. The result shows that the sockets can be used for Indonesians with a calf circumference between 317-345 mm. The simulation results show that the suitable material for use is carbon fiber composite material with a thickness of 3 mm with a bolt hole of 6 mm.]]>
<![CDATA[PENGARUH TEMPERATUR EKSTRUSI TERHADAP SIFAT FISIS, KIMIAWI DAN KEKUATAN TARIK FILAMEN ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE (UHMWPE) ]]>
<![CDATA[Candra Irawan]]>;
<![CDATA[Budi Arifvianto]]>;
<![CDATA[Muslim Mahardika]]>
<![CDATA[ Jurnal Teknologi Terapan Vol 7, No 2 (2021): Jurnal Teknologi Terapan ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Indramayu ]]>
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DOI: 10.31884/jtt.v7i2.325
<![CDATA[Currently, fused deposition modeling (FDM) has become a popular 3D printing technique for the fabrication of polymeric parts. In this technique, a polymer filament is melted and deposited layer-by-layer to form 3-dimensional objects. However, there are still limited number of polymer types that has been successfully used as a raw material for the FDM process. Up to now, there is still no filament made from ultra high molecular weight polyethylene (UHMWPE) available in the market. Therefore, a preliminary study concerning the fabrication of such UHMWPE filament needs to be conducted. In this study, the influence of extrusion temperature used in the fabrication of UHMWPE filament on the physical, chemical, and tensile strength of such filament was studied. The extrusion process was carried out by adding polyethylene glycol (PEG) and paraffin oil (PO) to improve the processability of UHMWPE material and with temperatures of 160 oC, 170 oC, and 180 °C. The result of examination by using electron microscope revealed that extrusion process of this polymer was running stable. The characterization by using differential scanning calorimetry (DSC) indicated a decrease in the degree of filament crystallinity as the extrusion temperature decreased. The characterization by using Fourier-transform infrared spectroscopy (FTIR) indicated no changes in the chemical compositions over the filament products with the increasing extrusion temperature applied. Meanwhile, it is also indicated from this study that the maximum tensile strength decreased as the extrusion temperature got lower. In this case, the highest maximum tensile strength could be achived by the UHMWPE filament extruded with temperature of 180 °C, i.e., with an average tensile strength of 22.52 MPa.]]>
<![CDATA[IMPLEMENTASI ALGORITMA K-MEDOIDS UNTUK CLUSTERING WILAYAH TERINFEKSI KASUS COVID-19 DI DKI JAKARTA ]]>
<![CDATA[Muh Arifandi]]>;
<![CDATA[Arief Hermawan]]>;
<![CDATA[Donny Avianto]]>
<![CDATA[ Jurnal Teknologi Terapan Vol 7, No 2 (2021): Jurnal Teknologi Terapan ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Indramayu ]]>
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DOI: 10.31884/jtt.v7i2.353
<![CDATA[In early March 2019, Indonesia was hit by the Covid-19 (Corona) outbreak. The increase in the number of patients infected with the Covid-19 virus is increasing day by day and is already difficult to control. Jakarta is no exception. To prevent the increase in cases of COVID-19, it is necessary to create a cluster or grouping of certain areas (Urban village) based on the number of positive, treated, recovered, died and isolated. This grouping will assist the DKI Jakarta government in providing appropriate handling according to the Urban village pattern. The data that will be used as a research study is the data on the distribution of the status of infected cases of Covid-19 in DKI Jakarta Province on May 20, 2021. The K-Medoids algorithm is a method that can determine a set of clusters among a group of data that is close to an object. Based on the research studies that have been carried out, it can be concluded that in the data mining technique, the total grouping of Covid-19 infected cases based on urban areas in DKI Jakarta Province uses the k-medoids algorithm with three clusters. Cluster 0, cluster 1, cluster 2. The highest Covid-19 infected cases in DKI Jakarta Province are shown in cluster 3 with 31 regions. The results of this grouping research will assist the DKI Jakarta government in providing appropriate handling according to the Urban village pattern. K-Medoids can be implemented using large amounts of data with complex attributes.]]>
<![CDATA[SOFTWARE UNDER TEST DALAM PENELITIAN SOFTWARE TESTING: SEBUAH REVIEW ]]>
<![CDATA[Ani - Rahmani]]>;
<![CDATA[Joe Lian Min]]>;
<![CDATA[S Suprihanto]]>
<![CDATA[ Jurnal Teknologi Terapan Vol 7, No 2 (2021): Jurnal Teknologi Terapan ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Indramayu ]]>
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DOI: 10.31884/jtt.v7i2.362
<![CDATA[Software under Test (SUT) is an essential aspect of software testing research activities. Preparation of the SUT is not simple. It requires accuracy, completeness and will affect the quality of the research conducted. Currently, there are several ways to utilize an SUT in software testing research: building an own SUT, utilization of open source to build an SUT, and SUT from the repository utilization. This article discusses the results of SUT identification in many software testing studies. The research is conducted in a systematic literature review (SLR) using the Kitchenham protocol. The review process is carried out on 86 articles published in 2017-2020. The article was selected after two selection stages: the Inclusion and Exclusion Criteria and the quality assessment. The study results show that the trend of using open source is very dominant. Some researchers use open source as the basis for developing SUT, while others use SUT from a repository that provides ready-to-use SUT. In this context, utilization of the SUT from the software infrastructure repository (SIR) and Defect4J are the most significant choice of researchers.]]>
<![CDATA[PEMANFAATAN TEKNOLOGI THERMAL ENERGY STORAGE NON-MEKANIK SEBAGAI PENGERING BAHAN PANGAN SINGKONG ]]>
<![CDATA[Rizki Muliawan]]>
<![CDATA[ Jurnal Teknologi Terapan Vol 7, No 2 (2021): Jurnal Teknologi Terapan ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Indramayu ]]>
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DOI: 10.31884/jtt.v7i2.334
<![CDATA[A drying machine is a machine that is used to dry some food or product. The process of heating can be used to preserve some products because drying reduces moisture content in the product and bacterial can’t live without water. Solar pond system will use for the machine which caught and trap the heat from the sun. The fluid in a pond of solar pond system is saltwater and the salinity will be varied. The variation of saltwater will be 3.5%, 5%, and 7%. In the solar pond system, some coils will circulate the water towards the cabin. The coil is made of copper pipe which has a length of 20.5 meters. This coil serves as a heat exchanger charged with the heat exchange process in the solar pond system. The water in this coil is circulated by a water pump. Water is circulated to the heat exchanger which is just below the cabin. The product used is 500 grams of cassava. Cassava is dried with the skin peeled and sliced about 2 mm thick. From the experiments that have been done obtained the best saltwater concentration is 7% with a tub temperature lower by 40 °C, the cabin temperature reaches 34.1 °C, and the water reduced of product weight by 210 grams. The COPactual heating average obtained by this machine is 1,15 and the COPcarnot heating average obtained by this machine is 29,80. The efficiency average that obtained by this machine is 3,77%.]]>
<![CDATA[RANCANG BANGUN DC TO DC BUCK CONVERTER DENGAN SISTEM KENDALI PI PADA NI ELVIS II DAN ANTARMUKA BERBASIS LABVIEW ]]>
<![CDATA[Afaf Fadhil Rifai]]>;
<![CDATA[Wahyudi Purnomo]]>;
<![CDATA[Revirda Eka Putri]]>
<![CDATA[ Jurnal Teknologi Terapan Vol 7, No 2 (2021): Jurnal Teknologi Terapan ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Indramayu ]]>
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DOI: 10.31884/jtt.v7i2.333
<![CDATA[Understanding basic concepts is an important thing in electronics, especially regarding the teaching aid of power electronic components. Given the need for students to study the model of electronic schematic with feedback controller, a media that can support this is needed. One of the developments in component technology and electronic circuits that can be studied is the DC voltage conversion, namely the DC to DC buck converter. This teaching aid model uses software, namely LabVIEW and the control and data acquisition hardware, namely NI ELVIS II. DC to DC buck converter schematic that can reduce the variable output voltage with a value range of 6 - 18VDC from an input voltage of 24VDC. PI feedback controller testing in the system experiment resulted in a difference of 0.1567% error using the PI controller parameter of Kp = 3.00 and Ti = 0.01. The test results with the PI controller show the expected response and can be applied to the buck converter circuit system. Testing the interface of the buck type DC to DC converter system is considered feasible as a learning aid with an overall interface quality value of 83.8% with student responds.]]>
<![CDATA[STUDI EKSPERIMEN PANEL SURYA DENGAN KOLEKTOR PEMANAS UDARA ]]>
<![CDATA[Mega Lazuardi Umar]]>;
<![CDATA[Prabuditya Bhisma Wisnu Wardana]]>;
<![CDATA[Asmar Finali]]>;
<![CDATA[Agung Fauzi Hanafi]]>;
<![CDATA[Rizqi Ilmal Yaqin]]>
<![CDATA[ Jurnal Teknologi Terapan Vol 7, No 2 (2021): Jurnal Teknologi Terapan ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Indramayu ]]>
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DOI: 10.31884/jtt.v7i2.335
<![CDATA[Solar panel is popular renewable energy technology because it is environmentally friendly, zero emissions, and environmentally clean. However, the energy conversion value from solar radiation to electricity is quiet small, more than 70% of solar radiation is discharged into heat energy. Therefore, a heat collector is needed to take advantage of the heat dissipation from solar panel. In this study, an air heat collector is placed at the bottom of the panel to indicating the potential energy, electrical efficiency and heat efficiency. It was found that solar panels with air heat collectors were able to increase the electrical efficiency of solar panels by 0.70%. The daily primary total energy efficiency value of solar panels with a heat collector is 17.47% higher than a solar panel without a collector. In the future, the results of this research can be a reference for academics and industry to develop their renewable energy potential.]]>
<![CDATA[PENGARUH PERLAKUAN ANNEALING DAN SHOOT PEENING TERHADAP KEKERASAN DAN STRUKTUR MIKRO PADA BAJA KARBON JIS S45C ]]>
<![CDATA[Bambang Hari Priyambodo]]>;
<![CDATA[Rizqi Ilmal Yaqin]]>;
<![CDATA[Margono Margono]]>;
<![CDATA[Kacuk Cikal Nugroho]]>
<![CDATA[ Jurnal Teknologi Terapan Vol 7, No 2 (2021): Jurnal Teknologi Terapan ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Indramayu ]]>
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DOI: 10.31884/jtt.v7i2.347
<![CDATA[The industrial world is currently growing rapidly. The need for JIS S45C as a structural steel is increasing which is used to manufacture machine components. Efforts to improve the mechanical properties of steel can use heat treatment and surface treatment. One of the surface treatments that is often used in the industrial world is shot peening. This study aims to determine the effect of annealing and shot peening treatment on S45C steel. The effect of treatment is indicated by changes in the results of both transverse and surface hardness tests and the microstructure of the treatment results. The result is a change in the value of hardness and microstructure changes in JIS S45C from the effect of annealing and shot peening treatments. The highest hardness in the annealing heat treatment and the 15 minute shot peening treatment was 252.08 kgf/mm2. The shot peening treatment causes the grains to become finer from the surface to the subsurface depending on the distance from the surface to the surface depth. These changes cause the surface and subsurface of JIS S45C carbon steel to increase in mechanical properties.]]>
