Politeknosains http://jurnal.politama.ac.id/index.php/jp <p>Jurnal Teknik Politeknik Pratama Mulia</p> en-US <p><strong><span style="text-decoration: underline;">Authors who publish with this journal agree to the following terms:</span></strong></p> <ul> <li style="text-align: justify;">Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li> <li style="text-align: justify;">Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li> <li style="text-align: justify;">Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).</li> </ul> poltek@politama.ac.id (Harjono) Fri, 03 May 2019 04:16:40 SE Asia Daylight Time OJS http://blogs.law.harvard.edu/tech/rss 60 Studi Eksperimental Water Filter Dust Collector Untuk Meningkatkan Kualitas Udara Di Dalam Bengkel Heat Treatment http://jurnal.politama.ac.id/index.php/jp/article/view/260 <p>Heat treatment is a manufacturing process that aims to change the metal structure by heating it to<br>reach the crystallization temperature (austenite), then holding it and cooling it (quenching) so that it<br>reaches the desired characteristic goals. In the quenching process, it causes smoke-shaped air<br>pollution which has no known pollutant content in it. This study aims to determine the content of<br>pollutants in smoke in the process of quenching heat treatment, using an experimental method that<br>uses a dust collector machine with a water filter model, by working the air during the quenching<br>process sucked by a water filter dust collector, then passing the water filter, finally the pollutants are<br>left in the water filter. Thus water contaminated by pollutants will be compared with pure water before<br>being polluted. From the results of the research the quenching process produced sodium pollutants of<br>44.1%, magnesium 1.79%, aluminum 1.25%, barium 95 parts per million, plumbum 82 parts per<br>million, copper 22 parts per million.<br>Keywords: Air pollution, dust collector water filter.</p> Yohanes Nugroho, Bayu Prabandono ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 http://jurnal.politama.ac.id/index.php/jp/article/view/260 Fri, 03 May 2019 00:00:00 SE Asia Daylight Time Aplikasi Bursa Kerja Khusus Berbasis Delphi 7 Menggunakan Barcode (StudiKasus Di SMK Negeri 2 Karanganyar) http://jurnal.politama.ac.id/index.php/jp/article/view/261 <p>The phases of making a special job market application for SMK Negeri 2 Karanganyar based on<br>Delphi 7 with barcode began with designing and creating a database using Microsoft Access 2007.<br>The database created is a student database, login database, database card, databease registration,<br>database selection, company database, database permission search and database. Next to design and<br>make the program using Delphi 7. In this application program there is a login form, main form,<br>registration form, selection form, search form, company form, student database form, user form<br>manager and permission form. The next stage is designing the registration report, selection report,<br>permit report, registration card report and the last trial and implementation program. This program is<br>implemented in the special job market of SMK Negeri 2 Karanganyar and according to the results of<br>respondents' assessment that this program is very helpful for special job market officials to be more<br>efficient in data collection and processing, and to help smooth officers in the input and management of<br>registrant data.<br>Keywords: Microsoft Access 2007, Delphi 7, Barcode.</p> Muklis Muklis, Cicilia Puji Rahayu, Taman Ginting ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 http://jurnal.politama.ac.id/index.php/jp/article/view/261 Fri, 03 May 2019 00:00:00 SE Asia Daylight Time Pencarian Fitur Optimal HalamanWeb Menggunakan Kombinasi Algoritme Genetika Dan Naivebayes Untuk Klasifikasi http://jurnal.politama.ac.id/index.php/jp/article/view/262 <p>affect the acquisition of value accuracy. These problems can be handled using feature selection<br>techniques. Feature selection method works by evaluating and selecting relevant and informative<br>features of each web page document. Features are a token or informative words that often appear on<br>web pages. In this study, the method used is the genetic algorithm and decision tree incorporated in<br>the wrapper technique. Genetic algorithms are used as subset selection and decision tree as attribute<br>evaluators. The proposed method is able to reduce features by 45.39% for the WebKB dataset and<br>56.71% for the r8 dataset. Overall, the results of the classification process increased although not too<br>significant.<br>Keywords : Algoritme genetika, decision tree, klasifikasi halaman web, naivebayes, seleksi fitur,<br>wrapper.</p> Hendri Noviyanto ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 http://jurnal.politama.ac.id/index.php/jp/article/view/262 Fri, 03 May 2019 00:00:00 SE Asia Daylight Time Metode Taguchi - PCR Topsis Untuk Optimasi Energi Dan Kecepatan Grafir Mesin Laser http://jurnal.politama.ac.id/index.php/jp/article/view/259 <p><sup>Along with technological developments and easy access to insight into creative entrepreneurship,<br>many people are competing to create creative products, one of which is by utilizing laser technology.<br>Laser cutting and engraving is used for the manufacture of engraving products in acrylic, wood, glass,<br>leather etc. The uniqueness of the results of laser engraving is uniform surface roughness and detailed<br>product contours. The main challenge of the laser engraving process is the process of setting<br>parameters that take a long time to get the desired surface roughness. The old process certainly results<br>in high energy consumption which affects the cost of the process. In this study the Taguchi method<br>combined with PCR-TOPSIS was used to optimize the engraving process parameters. The parameters<br>measured are scan speed, nozzle distance to the sample surface, and the percentage of energy for the<br>engraving process. The response parameters consist of the level of surface roughness, processing time,<br>and energy consumption used. The results of the optimization test obtained the engraving speed is 200<br>mm/s, the percentage of energy released by the laser engrave machine was 10 % and the nozzle<br>distance was 10 mm.<br>Keywords: Engraving Laser, Taguchi Method, PCR Topsis.</sup></p> Adi Nugroho, Adhi Setya Hutama ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 http://jurnal.politama.ac.id/index.php/jp/article/view/259 Mon, 11 Mar 2019 00:00:00 SE Asia Standard Time