http://jurnal.politama.ac.id/index.php/jp/issue/feed Politeknosains 2019-02-07T03:33:35SE Asia Standard Time Harjono poltek@politama.ac.id Open Journal Systems <p>Jurnal Teknik Politeknik Pratama Mulia</p> http://jurnal.politama.ac.id/index.php/jp/article/view/230 Pengaruh Dimensi Saluran Masuk pada Scrap Aluminium Sand Casting Pulley terhadap Kekerasan, Ketangguhan dan Struktur Mikro 2019-02-06T10:12:18SE Asia Standard Time Sumpena Sumpena sumpenast@yahoo.co.id Hb. Sukarjo sumpenast@yahoo.co.id <p>The purpose of this study for determine influence size of the inlet to the hardness, toughness and <br>microstructure pulley with casting mold sand raw materials aluminum scrap. The smelting process<br>using crucible furnace. Sand molds be made 3 kinds of different inlets, each inlet same was made 4 <br>sand molds. Hardness testing is done by using the Vickers hardness test. the load to pressure 100 gf, <br>the time to pressure 5 seconds. Toughness testing with use standard ASTM D256-03 machine test <br>impact charpoy. Observation of microstructure was observed on each specimen by using an optical <br>microscope. The hardness test results show that hardness value of the highest on the dimensions of <br>the inlet height 6 mm is 64.4 VHN while the lowest value to the dimensions of the inlet height 5 mm is <br>60.96 VHN. The toughness test results show that toughness value from the three specimens almost <br>the same is 0.057 joules / mm<sup>2</sup>; 0.0565 joule / mm<sup>2&nbsp;</sup>and 0.0565 joules / mm<sup>2</sup>. While the structure micro <br>of castings with high dimensional inlet 5 mm and 7 mm occurred structure micro which is almost the <br>same, while the dimensions of the inlet height 6 mm has a spread of Fe, Si and Mg is more evenly <br>distributed.<br>Keywords: dimensions of the inlet, pulley, mechanical properties</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/231 Pengaruh Rendaman Terhadap Perubahan Sifat Mekanik Komposit Polyester Resin - Partikel Arang Sekam Padi 2019-02-06T10:12:24SE Asia Standard Time Siswanto Siswanto siswanto.politama@gmail.com Fahmi Eka Saputra fahmi.komeng@yahoo.co.id Basmal Basmal basmalarie@gmail.com <p>Engineering materials utilizing waste Charcoal Husk Rice Particles (PASP) as a filler in the <br>unsaturated polyester resin matrix composite BQTN 157, aims to determine the effect of soaking to <br>changes in mechanical properties of flexural strength and impact strength in the composite specimen.<br>Polyester resin material mixed with a kind of BQTN 157 charcoal husk rice particles (PASP) vf 40%, <br>1% wt hardener. Material is poured into the mold, holding time 30 minutes. Composites are made <br>based on the test specimen flexural and impact test specimens. Composite given treatment soaking for <br>150 hours with a variation of the fluid; rain water, mineral water, and water wells with 10 wt% water <br>vinegar. Specimens in doing testing of flexural strength ASTM D 790 standards and impact testing <br>standard ASTM D 5941 to determine the mechanical properties of the composite. Testing Results <br>indicates that the flexural strength of the composite without treatment 35,50 N / mm2, while the <br>composite with the treatment had an average flexural strength: mineral water Soaking 34.53 N / mm2, <br>rain water soaking 34.66 N / mm2, soaking water wells + 10% Vinegar 32.89 N / mm2,. Tests on the <br>impact strength shows that the impact strength of the untreated composites 4,16 kJ / mm2, while <br>composites with bath treatment had an average impact strength as follows: Soaking mineral water <br>3,62 kJ / mm2, rain water soaking 3,35 kJ / mm2 , well water soaking + 10% Vinegar 2,98 kJ / mm2.<br>Keywords: polymer composites, bath treatment, mechanical testing</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/232 Gasifikasi Batubara dan Limbah Pertanian Guna Mendapatkan Bahan Bakar Gas Alternatif 2019-02-06T10:12:32SE Asia Standard Time Agus Nugroho anugroho58@ymail.com Joko Rochmadi jokorochmadi@yahoo.com <p>Now, along with the price of kerosene is expensive , hence the idea of the use of coal briquettes in <br>ground water reappears . Even the government has planned to make coal briquette stove 10 million <br>to help the poor who can not afford to buy kerosene . However, it is still lacking in the community <br>response including the small and medium enterprises ( SMEs ) who are currently looking for <br>confusion cheap fuel substitute for oil , coal briquettes because it still contains some weaknesses <br>include air pollution , especially smell and smoke , in side need time ( 5-10 minutes, depending on the <br>quality of the coal briquettes ) to lit it , after a great fire was lit a little difficult to manage. Gasification <br>system has several advantages over direct combustion of coal . Because the form of gas, combustion <br>gas through the gasification of coal is much more easily controlled than direct combustion of coal , <br>gas coal gasification process results can be used for various purposes , among others, to cook , drive <br>the gas turbine , motor fuel moving in , as fuel in boilers, as well as for lighting. Utilization of biomass <br>gas for cooking purposes using a reactor or a device called a gasification furnace . However, for me <br>- gasification of coal gasification furnace required a special design so that the process of gasification <br>and combustion can take place more efficiently and more clean.<br>Keywords: Alternative Energy, Coal, Gasification Furnace</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/233 Pengaruh Siklus Panas pada Komposit Limbah Plastik HDPE- Serat Cantula sebagai Bahan Material Alternatif Melalui Uji Mekanik 2019-02-06T10:12:39SE Asia Standard Time Teguh Wiyono masgoeh@yahoo.com Sunaryo Sunaryo masgoeh@yahoo.com Burhan Ibnu Mubtadi masgoeh@yahoo.com <p>This research is to determine the effect of thermal cycling on mechanical properties of such <br>composites. Mechanical properties test in the tensile strength, bending strength and impact strength. <br>Composite materials using HDPE powder as a cosmetic bottle waste cantula matrix and fibers as <br>reinforcement, fiber volume fraction is 40% composed of random. Specimens were made using a hot <br>molding machine. Temperature thermal cycle with a variation of 60 ° C, 70 ° C, 80 ° C, 90 ° C and <br>100 ° C. Variations in the number of cycles performed 100 times. Testing of mechanical properties of <br>the composite tensile strength using ASTM standard 3039, bending strength ASTM D 6272 standard, <br>and impact strength testing with ASTM D 5941. Results of testing the mechanical properties of <br>composites obtained the data that the composite thermal cycle with a temperature of 60 ° C were <br>carried out as many as 100 times. The tensile strength of 26 MPa, bending strength of 29 MPa and <br>impact strength 45 kJ / m². Composites with a thermal treatment at temperatures above 70 ° C resulted <br>in the degradation of the material so that the mechanical strength decreases.<br>Keywords: HDPE waste, fiber cantula, polymer composite</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/235 Studi Eksperimental Nilai Kekerasan Semikonduktor ZnO terhadap Variasi Beban Kompaksi 2019-02-06T10:12:47SE Asia Standard Time Agus Kurniawan a_kurniawan@atmi.ac.id Bayu Prabandono bayu_prabandono@atmi.ac.id Sularman Sularman ularman83@atmi.ac.id <p>One important process in manufacturing pellet material is a compaction. This research will study <br>the hardness value at ZnO semiconductor material that is compacted with different pressure. The first <br>material is pure ZnO that was grinded with agate mortar, filtered and compacted with pressure are <br>10 bar, 20 bar and 30 bar so the pellet form were shaped. The size of pellet is  13 x 2 mm. <br>Furthermore, these pellet sintered at temperature 1300oC than it will test by vikers microhardness <br>testing. The testing result is that the greatest vikers microhardness at the material that is compact at <br>30 bar. The mean value of it is 213.85 Hv. The greater of compacting pressure given the higher value <br>of the material's hardness. Nevertheless, the magnitude of compacting pressure must consider the <br>ability of the compacting mold.<br>Keywords: ZnO Semiconductor, Pellet, Compaction, Vikers Microhardness.</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/236 Penurunan Kadar COD dan TSS dengan Menggunakan Teknik Pipe Filter Layer pada Limbah Industri Keripik Singkong 2019-02-07T03:30:03SE Asia Standard Time Siti Fatimah sf120@ums.ac.id Najmudin A. Mumtaz sf120@ums.ac.id <p>Cassava contains hydrocyanic acid (HCN) derived from the hydrolysis process cyanogenic <br>glucoside (linamarin and lotaustralin) by endogenous enzymes that are marked in blue on cassava. <br>Production of cassava chips contained in Donohudan, Surakarta very abundant with a turnover of 10 <br>tons each month so that the production pro cess produces some waste that has no economic value. <br>Wastewater from the washing of cassava chips can be a serious problem if not treated properly. <br>Mechanical installation of pipe filter layer may be one alternative to resolve these problems .. This <br>technique uses a combination of natural adsorbent with terraced flowed into the pipe. The adsorbent <br>used include gravel, sepet (coconut fiber), silica sand, zeolite. The parameters examined in this study <br>is the analysis of the levels of COD (Chemical Oxygen Demand) and TSS (Total Solid Suspended) in <br>the wastewater industry cassava chips. Data collection was performed by calculating the COD and <br>TSS levels before and after processing with pipe filter layer. Based on data obtained optimum pH <br>value accordance with the standard of food waste that is 7.89. For COD and TSS, the optimum value <br>changes occurred on respectively of 99.5% and 99.7%. Mechanical pipe filter layer effectively handle <br>the wastewater industry cassava chips<br>Keywords: cassava, .wastewater, pipe filter layer, COD, TSS</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/237 Optimalisasi Nilai Kekuatan Bending Pembuatan Komposit UPRS - Cantula 3D dengan Metode Taguchi 2019-02-07T03:30:09SE Asia Standard Time Lujeng Widodo at-warga@atw.ac.id Teguh Wiyono masgoeh@yahoo.com <p>The needs industry on composite materials made from natural fibers with a quality that meets the <br>standards is expected. Because of the existing raw materials can not meet the needs of material is <br>strong, lightweight, inexpensive and environmentally friendly.Number Variations of thread, Total <br>Torsion, Structure and Percentage Resin wicker is used as a combination of factor levels. Composite <br>tensile testing refers to the , for bending testing refers to the standard ASTM D 790-97. The statistical <br>testing performed; Normality, homogeneity, Anova, SNR and different test. To simplify ANOVA the <br>writer used Taguchy methode. The results show that the fabric construction, especially the number of <br>torsion and resin concentration effect on tensile strength while the type and concentration of resin <br>wicker affect tensile strength while the optimal value is achieved for Pull strength 1,02 MPa. At the <br>factor level combination Ne1 0.8, Twist 500, Woven with 16 cards and 35% resin concentration. <br>Keywords: Composite, Yarn, twist, 3D Woven, resin concentration, Taguchy methode</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/238 Rancang Bangun Mesin CNC Router Berbasis Arduino 2019-02-06T09:45:08SE Asia Standard Time Sudarno Sudarno isusay@gmail.com Martono Martono isusay@gmail.com Sholih Mauladin isusay@gmail.com <p>CNC Router machine is a cutting machines based computer that can run the process automatically <br>on a wide variety of materials based commands that have been programmed into the software. CNC <br>Router design aims design and create a CNC Router machine with hardware and software that is easy <br>to use and come in the market. Software used in the operation of the machine is Grbl Controller, while <br>for the microcontroller use of ATMega328 from Arduino Uno R3 board. Supported also by the <br>Arduino Software and X-Loader, as well as making the program (design) using Mastercam Mill 9.<br>The result of design CNC Router machine is used for testing in the manufacture of finished object in <br>the form of a 2D image on paper media, and can be developed for future learning media.<br>Keywords : CNC Router Machine, Grbl Controller, Arduino Uno R3, Mastercam Mill 9.</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/239 Rancang Bangun Mesin CNC Router Berbasis Arduino 2019-02-07T03:30:15SE Asia Standard Time Sudarno Sudarno isusay@gmail.com Martono Martono isusay@gmail.com Sholih Mauladin isusay@gmail.com <p>CNC Router machine is a cutting machines based computer that can run the process automatically <br>on a wide variety of materials based commands that have been programmed into the software. CNC <br>Router design aims design and create a CNC Router machine with hardware and software that is easy <br>to use and come in the market. Software used in the operation of the machine is Grbl Controller, while <br>for the microcontroller use of ATMega328 from Arduino Uno R3 board. Supported also by the <br>Arduino Software and X-Loader, as well as making the program (design) using Mastercam Mill 9.<br>The result of design CNC Router machine is used for testing in the manufacture of finished object in <br>the form of a 2D image on paper media, and can be developed for future learning media.<br>Keywords : CNC Router Machine, Grbl Controller, Arduino Uno R3, Mastercam Mill 9.</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/240 Kendali Pintu Air Otomatis Berbasis Speech Recognition Menggunakan Metode MFCC dan Jaringan Syaraf Tiruan 2019-02-07T03:30:22SE Asia Standard Time Imam Fadli ifad2011@gmail.com <p>In this research, the speech of command for sluice recorded and then the coefficient of signal <br>speech taken using MFCC algorithm. These coefficients becomes features of speech signal and using <br>as input in neural network to be training data. After training, the testing using data test conducted to <br>see how the algorithm of neural network have good working and how the effectiveness of controlling <br>automatic sluice. There is 5 coefficients of the word of “BUKA” (English: “OPEN”) and so is word <br>of “TUTUP” (English: “CLOSE”). That 5 coefficients was taken as features then repeated 15 times <br>to be used as training data in neural network. The total number of command speech is 30. The 20 test <br>data for “BUKA” and 20 for “TUTUP” used to test the system in controlling sluice by speech. After <br>the test we get the result the accuracy for “BUKA” is 75% and 55% for “TUTUP”. Testing with <br>giving command using “OPEN” and “CLOSE” give us the result by there is no stability in output of <br>the value of neural network (y). From the neural network training, the output of training is 1.01325<br>for “BUKA” and 0.0930902 for “TUTUP”. With using the other word we get the value of y is changeable <br>inconstantly.<br>Keywords: control system, microcontroller, automatic sluice, MFCC, Neural Network.</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/241 Pengembangan Aplikasi Pelaporan Modul Penerimaan Negara Generasi 2 (MPN G - 2) Menggunakan Digital Signature pada PT. Bank BNI Syariah 2019-02-07T03:30:29SE Asia Standard Time Ahmad Muharria Rajhasla Putra muharria@gmail.com Wendi Usino muharria@gmail.com <p>As one of the bank of perception, BNI Syariah has a duty not only to develop the payment system <br>but also to require submitting a report to the Ministry of Finance. There are two things to be reported, <br>namely the report on H + 0 and report on H + 1. Report on H + 0 consists of DNP Reports (Daftar<br>Nominatif Penerimaan) and LHP (Laporan Harian Penerimaan). Both reports should be submitted <br>in text file format. Report on H + 1 is report of Bank Statement (BS) or Rekening Koran report that <br>contains transaction based on bank systems. This research describes about development MPN G-2 <br>reporting at PT. BNI Syariah by implementing digital signature with RSA algorithm. The result of this <br>research is the application generates the reporting before 09.00 H+1 and not have penalty. For data <br>authentication, this application implement RSA algorithm, so data of rekening koran will be valid.<br>Keywords: Reporting, digital signature, RSA, rekening koran, authentication</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/242 Aplikasi Algoritma Kriptografi dan Steganografi untuk Keamanan Informasi Berbasis Teks 2019-02-07T03:33:23SE Asia Standard Time Wiji Lestari wijiles912@gmail.com Supardi Supardi wijiles912@gmail.com Afu Ichsan Pradana wijiles912@gmail.com <p>This study will produce a system of text-based information security applications using <br>cryptography algorithms Hill Code and Steganography LSB (Least Significant Bit). System <br>information security applications are built to be used for text-based data security. The algorithms <br>used for cryptography is Hill Code with a matrix of 2 x 2sebagai encryption keys, whereas the <br>description used for the inverse of a matrix initial key. Steganography algorithm used is the LSB <br>(Least Significant Bit) insertion in every bit of content (confidential data) into a low bit or bits of the <br>far right. As known to a bitmap (.bmp) 24 bits consist of three pixels in which each pixel is a collection <br>of 8 bits or 1 byte (a value between 0 to 255atau in binary format between 00000000 to 11111111), <br>who presented the value of the intensity of the light that forms the base color namely red, green or <br>blue (red-green-Blue or RGB). Thus in each pixel can be inserted 3 content. The results of the <br>implementation and testing of the system shows that the system is running well, the implementation of <br>the algorithm results are consistent with the manual calculation.<br>Keywords: Information Security, Cryptography, Steganography, Hill Code, Least Significant Bit</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement## http://jurnal.politama.ac.id/index.php/jp/article/view/243 Perancangan Aplikasi E-KIRT Berbasis Android untuk Meningkatkan Pemasaran dan Penjualan bagi Kelompok Industri Rumah Tangga 2019-02-07T03:33:29SE Asia Standard Time Solikhin Solikhin lihien_2006@yahoo.com <p>In Tegal are small and medium enterprises (UKM) in the form; Household Industrial Group <br>(KIRT). Household Industrial Group "Kenanga" and "Kangen Rasa" is a group of independent homebased business that produces snacks Rengginang and Keripik Singkong. Industry Group Household <br>“Kenanga” and “Kangen Rasa” in running the business experienced some classical problems, one <br>of which is the marketing of their products are still using traditional methods or conventional to shops <br>(door to door) and word of mouth (word of mouth ). Based on the problems faced, through research <br>activities in accordance with the agreement of both Domestic Industry Group E-KIRT required <br>application. Through the application of E-KIRT will be running the business through the Internet, <br>both in promoting the results of product or performing a transaction. It is very helpful Industry Group <br>Household, mainly to expand the marketing impact on increasing sales turnover, number of <br>production, and no less important is that it can shorten the marketing chain to the distributor, so that <br>the value of profits intact and the impact on the improvement of public welfare businesses Household <br>Industrial group Rengginang "Kenanga" and Keripik Singkong "Kangen Rasa".<br>Keywords: Marketing, Promotion, E-KIRT, Household Industry Group, UKM.</p> 2016-09-12T00:00:00SE Asia Daylight Time ##submission.copyrightStatement##