Articles
<![CDATA[DETEKSI KERUSAKAN RODA GIGI DENGAN ANALISIS SINYAL GETARAN ]]>
<![CDATA[Widodo, Achmad]]>;
<![CDATA[Satrijo, Djoeli]]>;
<![CDATA[Prahasto, Toni]]>
<![CDATA[ ROTASI Vol 17, No 2 (2015): VOLUME 17, NOMOR 2, APRIL 2015 ]]>
Publisher : <![CDATA[Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro ]]>
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DOI: 10.14710/rotasi.17.2.67-75
<![CDATA[Roda gigi adalah salah satu komponen mesin yang banyak digunakan dalam sistem transmisi daya. Roda gigi meneruskan daya dari motor melalui mekanisme kontak antar gigi-gigi pada gear dengan gigi-gigi pada pinion. Dengan mekanisme ini, diharapkan tidak terjadi slip selama proses transmisi daya berlangsung. Akibat adanya beban kontak dan kondisi operasi, kerusakan roda gigi dapat terjadi baik kerusakan permukaan seperti pitting, scoring maupun gigi patah. Kerusakan tersebut berpengaruh terhadap kinerja roda gigi, timbulnya noise dan getaran yang berlebih. Oleh karena itu, deteksi dini dari kerusakan roda gigi diperlukan karena dapat mengurangi kerugian terjadinya kerusakan yang bersifat katastropik. Penelitian ini bertujuan untuk menganalisis karakteristik sinyal getaran domain waktu dan frekuensi roda gigi pada kondisi normal, aus dan patah. Metode penelitian ini dilakukan dengan menggunakan test rig roda gigi lurus dengan rasio 1:2. Data akuisisi sinyal getaran dilakukan pada putaran 1000 rpm. Analisis sinyal getaran dilakukan dengan time synchronous averaging (TSA), wavelet transform dan cepstrum. Hasil analisis menunjukkan bahwa metode TSA dan wavelet mampu mendeteksi kerusakan roda gigi serta mampu menentukan lokasi relatif dari cacat roda gigi berdasarkan sudut putar. Metode cepstrum mampu mendetekasi frekuensi kerusakan roda gigi tetapi tidak bisa menentukan lokasi relatif cacat roda gigi berdasar sudut putar.]]>
<![CDATA[MODELING BILL-OF-MATERIAL WITH TREE DATA STRUCTURE: CASE STUDY IN FURNITURE MANUFACTURER ]]>
<![CDATA[Prahasto, Toni]]>
<![CDATA[ J@ti Undip : Jurnal Teknik Industri Volume 3, No.2, Tahun 2008 ]]>
Publisher : <![CDATA[Departemen Teknik Industri, Fakultas Teknik, Universitas Diponegoro ]]>
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DOI: 10.12777/jati.3.2.78-82
<![CDATA[This paper presents a modeling of Bill-of-Material with tree data structure. The BOM represents wooden furniture products. The management of BOM is incorporated into an MRP software which is specially built for a furniture manufacturer. The tree data structure is approached with an object oriented programming to provide the creation and modification of the data. The tree object is designed so that a downstream programmer can create an application with high productivity, using the BOM object of course. Legality of the development is ensured by adapting open source resources, i.e. MySQL database engine, PHP server script, and client-side Javascript. The BOM object is used extensively in the MRP software that is being developed. A couple of screenshots are presented to demonstrate the ease of creation and manipulation of Bill-of-Material. The proper approach of modeling BOM with tree structure allows the programmer to reach high productivity during the development of the aforementioned MRP customized software. Keyword : Modeling, Bill of Material, Tree Data Structure]]>
<![CDATA[Web Usage Mining, Pattern Discovery dan Log File ]]>
<![CDATA[Suratno, Tri]]>;
<![CDATA[Prahasto, Toni]]>;
<![CDATA[Rochim, Adian Fatchur]]>
<![CDATA[ JSINBIS (Jurnal Sistem Informasi Bisnis) Vol 1, No 2 (2011): Volume 1 Nomor 2 Tahun 2011 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.21456/vol1iss2pp93-98
<![CDATA[Analysis  of  data  to  access  the  server  can  provide  significant  and  useful  information  for  performance  improvement,  restructuring  andimproving the effectiveness of a web site. Data mining is one of the most effective way to detect a series of patterns of information from large amounts of data. Application of  data mining  on  Internet use  called web  mining  is a set of  data mining  techniques  are  used  for the web. Web mining technologies and data mining is a combination of web, which is the integration of technology resources extracted from the  information  world wide web  as  the  implications  of the  web  resources  of interest to  know the  value  of the  model extraction Potentialuse of  data mining  algorithms  over  a variety  of  observational  data for  identify  patterns  of  web resources. Target analysis of web mining is the data from the web, such as data visitors access, web page structure, and format web pages.  Target analysis of the study is that web mining  web  usage  mining  using  association  rules  on  the  website  www.faperta.unja.ac.id  obtained  from  the  log  file  that  is  used  to discover the navigation patterns, and discover the rules of the association between a combination of items.  To  determine the pattern ofvisits  in  a  web,  and  to  identify  what  pages  are frequented by  visitors  of  a  website,  which  can  be used  to  improve  website design  andrecommend the display, as well as the links are often used by visitors, so the quality of services from website www.faperta.unja.ac.id can be provided effectively and efficiently.Keywords : Web Mining; Web usage mining; Data mining; Log file; Website; World wide web]]>
<![CDATA[Penilaian Risiko Aplikasi Web Menggunakan Model DREAD ]]>
<![CDATA[Suprihanto, Didit]]>;
<![CDATA[Prahasto, Toni]]>;
<![CDATA[Sugiharto, Aris]]>
<![CDATA[ JSINBIS (Jurnal Sistem Informasi Bisnis) Vol 3, No 2 (2013): Volume 3 Nomor 2 Tahun 2013 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.21456/vol3iss2pp59-66
<![CDATA[Application that is developed by web based, beside has surplus in WWW technology, it has susceptibility side that can be threat too. Susceptibility generate risk and can bring out big trouble even effect big disadvantage. The goal of this research is design and build document risk assessment system of threat level and prevention advice. It use DREAD model as method to solve trouble by giving qualified information. This information are used to produce risk level in web application. The result of this research is web application risk assessment system by using DREAD model to know risk threat level and equate perception of web threat risk to application developer, minimize of threat risk and maximize performance of web application.  Keywords : DREAD model, web threat risk, web risk assessment system]]>
<![CDATA[Diagnosa Kerusakan Bearing Menggunakan Principal Component Analysis (PCA) dan Naïve Bayes Classifier ]]>
<![CDATA[Pudyastuti, Dwi]]>;
<![CDATA[Prahasto, Toni]]>;
<![CDATA[Widodo, Achmad]]>
<![CDATA[ JSINBIS (Jurnal Sistem Informasi Bisnis) Vol 6, No 2 (2016): Volume 6 Nomor 2 Tahun 2016 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.21456/vol6iss2pp114-123
<![CDATA[This research is discussing about the usage of data mining which addressed for bearing fault diagnosis. Bearing was one of the essential parts in industry machinery. Bearing was used to reduce machines frictions or could be a moving component which oppressed each other. This fault diagnosis can avoid loss and damage of other machines components. This research was started with data preprocessing using wavelet discrete transformation, feature extraction, feature reduction using Principal Component Analysis (PCA), and classification process using Naïve Bayes classifier methods. Naïve Bayes Classifier is a classification method which based on probability and Bayesian theorem. Output of these method shows that Naïve Bayes classification have a good performance which shown by a good accuracy in each data test.]]>
<![CDATA[Penggunaan Jaringan Syaraf Tiruan Backpropagation Untuk Seleksi Penerimaan Mahasiswa Baru Pada Jurusan Teknik Komputer Di Politeknik Negeri Sriwijaya ]]>
<![CDATA[Agustin, Maria]]>;
<![CDATA[Prahasto, Toni]]>
<![CDATA[ JSINBIS (Jurnal Sistem Informasi Bisnis) Vol 2, No 2 (2012): Volume 2 Nomor 2 Tahun 2012 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.21456/vol2iss2pp089-097
<![CDATA[Data availability of new studentsat the Polytechnic State Srivijaya high enough, so the need fora method to analyze the data. Artificial neuralnetwork  is  an  information  processing  system  that  has  characteristics  similar  to  biological  neural  networks,  neural  network  sare  used  topredict because ofthe ability of a good approach to ketidak linearan. This study  will design the software selection admission of new studentswith a  backpropagation  neural network  methods.   From the analysis of  backpropagation  neural networks  with  one  hidden layer  with  the number of neurons 50, 1000 iteration sand the activation functiont an sigproduce regression of 0.4822. Backpropagation neural network withtwo  hidden  layers  with  the  number  of  neurons  50,  4000  iterations  with  tansig  activation  function,  resulting  in  regression  of  0.7944. Backpropagation  neural networks  with 3  hidden layer  with  the number of neurons  35,  5000  iterations, resulting in  regression  of  0.8563. Based  on  the  results  of  this  analysis,  backpropagation  neural  networks  quite  effectively  used  for  selection  of  candidates  for  student admission.Keywords: Selection, Backpropagation, Regression]]>
<![CDATA[Evaluasi Human Machine Interface Menggunakan Kriteria Usability Pada Sistem E-learning Perguruan Tinggi ]]>
<![CDATA[Qashlim, Akhmad]]>;
<![CDATA[Prahasto, Toni]]>;
<![CDATA[Gernowo, Rachmat]]>
<![CDATA[ JSINBIS (Jurnal Sistem Informasi Bisnis) Vol 4, No 2 (2014): Volume 4 Nomor 2 Tahun 2014 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.21456/vol4iss2pp96-107
<![CDATA[Integration HMI with usability in user interface design process is a standart of the success of a website. The design process is done through the approach to the end user to find a problem solution of human machine interface phenomena. It can also generate the maximum level of satisfaction and success of implementation of the website. The purpose of this research is to evaluate HMI using usabilitycriteria to know the application of HMI concept in e-learning and provide proposals for improvements to the HMI. Questionnaire Data were processed using a descriptive analysis and methods of CFA to know the variables that are weakest and which indicators have an important role in shaping the research variables. Evaluation results indicate the application concept of HMI in the e-learning had been done but not the maximum. Data analysis of the results obtained that the main problem lies in the accessibility criteria in the meantime indicator latent variables from forming error prevention, learnability, memorability, visibility and accessibility of influential factor loading values indicated significantly (unidimensionalitas) in shaping the criteria of latent variables in first-order CFA. The end result of this research is the proposal of improvement as a HMI solution in the form of principles and technicsuser interface design. This solution is focused on the development of standards for the quality of the interface in e-learning systems and not on the digital learning content presented on the e-learning system. Keywords: Descriptive analisis; Human machine interface; Usability; Confirmatory factor analisys; Elearning]]>
<![CDATA[Particle Swarm Optimization Untuk Sistem Informasi Penjadwalan Resource Di Perguruan Tinggi ]]>
<![CDATA[Mansur, Mansur]]>;
<![CDATA[Prahasto, Toni]]>;
<![CDATA[Farikhin, Farikhin]]>
<![CDATA[ JSINBIS (Jurnal Sistem Informasi Bisnis) Vol 4, No 1 (2014): Volume 4 Nomor 1 Tahun 2014 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.21456/vol4iss1pp11-19
<![CDATA[Course timetabling management information system is a system focusing on data management resource and constraints in optimizing the use of available resources and avoid clashing in the process of making class timetabling, so that the resulting information will be effective. Results of such information may assist the college in planning the use of space, and to develop programs of study. Data resource and constraints are implemented using timetabling information system with PSO algorithm. The results of the data analysis using the PSO algorithm by combining six hard constraint and two soft constraints cannot produce an optimal solution, because there are still clashing lecturer-timeslot (soft1), but without combining both soft constraints can produce maximum solutions in the use of the room, where the solution with the best fitness value (0.333), c1(2,0), c2(2,0), w(0,2), and maximum of 10 iterations of the desired solution. The final results are timetabling management information system for resource utilization that generates class timetable information and use of the room. Â Keywords : Management information system; PSO algorithm; Resource; Constraints; Course timetabling; Higher education]]>
<![CDATA[Analisis Faktor Kredibilitas Website E-Commerce Indonesia Studi pada Online Purchasing ]]>
<![CDATA[Cordiaz, Muhammad]]>;
<![CDATA[Prahasto, Toni]]>;
<![CDATA[Widiyanto, Ibnu]]>
<![CDATA[ JSINBIS (Jurnal Sistem Informasi Bisnis) Vol 3, No 1 (2013): Volume 3 Nomor 1 Tahun 2013 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.21456/vol3iss1pp41-47
<![CDATA[In the number of Internet users in Indonesia continues to increase. Internet increasingly being used for purchasing online. There are many e-commerce websites that offer goods and services online. Internet users should be able to distinguish which websites are credible before engaging in electronic commerce activities. Be an interesting question, what factors are rated by visitors of a website as an e-commerce website that is credible or reliable. Using a web-based survey methods, respondents were asked what factors support the credibility of the website in electronic commerce purchasing transactions. The respondents were Internet users. Proposed survey questions are grouped into four factors, namely, kerpercayaan factors, factors expertise, sponsorship factors and specific factors. The survey results were tested with descriptive statistic. Based on the data obtained, the Trust Factor respondents prefer e-commerce website that is trusted by his close associates, while the respondents assess the Skill Factor of websites that apply when payments online transactions through banks Indonesia is considered more reliable. In the Sponsorship Factor and Specific Factor, respondents believe the e-commerce website that does television ads in the media and managed by official institutions. Keywords : credibility, trustworthiness, expertise, electronic commerce, online purchasing]]>
<![CDATA[Rancang Bangun Computer Assisted Instruction (CAI) Sebagai Media Pembelajaran Dalam Mata Pelajaran Fisika Sekolah Menengah Atas ]]>
<![CDATA[Harjanto, Arif]]>;
<![CDATA[Prahasto, Toni]]>;
<![CDATA[Suhartono, Suhartono]]>
<![CDATA[ JSINBIS (Jurnal Sistem Informasi Bisnis) Vol 1, No 3 (2011): Volume 1 Nomor 3 Tahun 2011 ]]>
Publisher : <![CDATA[Universitas Diponegoro ]]>
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DOI: 10.21456/vol1iss3pp177-122
<![CDATA[Strategy of using of Computer Assisted Instruction (CAI) as learning media is needed for solving problems that rise in learning process. Good learning packaging give positive effect in improving human potency. CAI as learning media based on computer microprocessor is built as complement and support learning method that usually use lecturing method, information discussion, and presentation.  The goal of this research is design and build interactive learning media CAI by multimedia technology. Result of this research is CAI visualisation by tutorial model and simulation as physics learning media by computer for senior high school students, XI Grade. This research involve a number of 8 teachers and 90 student XI Grade as respondents. Respondents questionnaire result show that 91.11% of students state that CAI product is qualified, 75.11% of students state that material presentation are qualified, 95.11% of students state that CAI program can increase study motivation.Keywords : Computer Assisted Instruction (CAI); Learning Media; Multimedia; Physics.]]>
