Jurnal Sistem Komputer - JSK (Department of Computer System Engineering, Diponegoro University, Indonesia)
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ANALISA PENGARUH PENAMBAHAN SILANE TERHADAP UNJUK KERJA ISOLATOR BAHAN RESIN EPOKSI DENGAN KONTAMINAN PANTAI
Full text linkSalah satu bahan polimer yang dikembangkan sebagai isolator adalah Resin Epoksi. Bahan polimer ini memiliki kelebihan dibandingkan dengan isolator bahan isolasi keramik dan gelas. Isolator yang digunakan pada saluran transmisi dan jaringan distribusi seringkali melalui daerah pantai yang memiliki pengaruh terhadap kinerja isolator. Adanya kontaminan di udara dapat menempel pada permukaan material isolasi pasangan luar sehingga menyebabkan arus bocor mengalir pada permukaan isolator tersebut. Arus bocor ini merupakan peristiwa awal yang dapat mengakibatkan degradasi permukaan isolator yang lama-kelamaan menyebabkan terjadinya kegagalan isolator. Makalah ini mempresentasikan hasil pengukuran arus bocor skala laboratorium pada bahan material resin epoksi silane dengan menggunakan metode pengukuran Inclined-Plane Tracking (IPT). Pengukuran ini dilakukan untuk mengetahui pengaruh variasi komposisi silan terhadap sudut kontak hidrofobik dan arus bocor. Pengolahan data yang dilakukan meliputi pengukuran sudut kontak, waktu terjadinya arus bocor, arus bocor rata-rata, dan waktu penjejakan. Berdasarkan hasil pengukuran dan analisis data menunjukkan bahwa komposisi silan mempengaruhi sudut kontak, waktu terjadinya arus bocor, besar arus bocor rata-rata, dan waktu penjejakan. Dilihat dari keseluruhan faktor yang diukur, maka didapatkan komposisi bahan yang optimal yaitu resin epoksi dengan persentase silane 30%.Permalink: http://jsiskom.undip.ac.id/index.php/jsk/article/view/2
Instant Image Resizer
Full text linkToday, digital technology is entering people’s life in many of forms, including digital images. As the increase of digital images quality, the size and dimension is bigger as well. Problem such as uploading time arises. Tools to make image file smaller in both size and dimension instantly is needed especially for instant purpose like sending via email or upload to social network sites. Developed in .Net Framework environment, Instant Image Resizer software will try to be one of tool that work instantly for resizing image. As resampling method, HighQualityBicubic will be used to achieve optimum quality. As user interface, this tool will use shortcut menu on Windows Operating System so user can access easily and instantly can give resize command to image file. Shortcut menu will be use context menu handler to handle verbs and file association that related to image in Windows Operating System. And as a software development approach, waterfall methodology will be used.Permalink: http://jsiskom.undip.ac.id/index.php/jsk/article/view/1
Aplikasi Bergerak dengan Java J2ME untuk Pelaporan Penyelidikan Epidemiologi Penyakit Demam Berdarah
Full text linkNowadays, reporting system of Dengue Hemorrhagic Fever Epidemiologic investigation (PE DBD) in Health Department uses manual recording system. It takes more times for printing as well as for reading. This inefficient system will affect a longer decision making to handle the spread of dengue fever in Semarang. Therefore, a research is needed to overcome these problems, i.e. by developing mobile application embedded in cell phone and web application as administrator to facilitate the data management transmitted. There are several steps taken in this research. First, analyzing the existing system in Health Department. Second, designing system with Unified Modeling Language (UML). Third, developing an application using Java J2ME for client and Java J2EE for server as programming language and MySQL as database server. The last step is application testing.. Based on research results, it can be concluded that this application has been able to facilitate and accelerate the process of reporting the current PE dengue disease. Users consist of officers of PE as a user of mobile applications for data entry operator of PE DBD and P2P as web application server administrator. Through a web application, administrators can print data input PE of phone listed in the form of dynamic HTML.Permalink: http://jsiskom.undip.ac.id/index.php/jsk/article/view/2
Detection of the Breast Cancer from Thermal Infrared Images
No full textThermography can be used as part of an earlydetection tool which gives women of all ages the opportunityto increase their chances of detecting breast diseases at avery early stage. Breast thermography is a noninvasiveprognostic procedure which can predict a tumor growth ratein breast cancer patients. The objective of this research is toacquire the potential of the statistical characteristics of thebreast thermogram images for the detection of the breastcancer.For this research we use thermal data images fromSardjito hospital at Yogyakarta, from normal and abnormalbreast (detected breast cancer). Firstly, download the breastimage thermograms from the InsideIR software of FlukeTi20 and save them as the inputs to our image processingprogram. Then adjust the format of the images, convert tograyscale images, and crop them to separate the suspectedobjects from the background. Finally we tabulated thestatistical characteristics of the objects which are the means,standard deviations, and entropy to reveal the abnormalitiesof breast thermograms.The results show that the method are promising todetect the abnormality on the breast thermogram images.The normal breast thermograms have minimum entropieswhich differ from those abnormal thermograms in the earlystage of breast cancer and thesignificantly from the moreadvanced of breast cancer
Comparation on Several Smoothing Methods in Nonparametric Regression
Full text linkThere are three nonparametric regression methods covered in this section. These are Moving Average Filtering-Based Smoothing, Local Regression Smoothing, and Kernel Smoothing Methods. The Moving Average Filtering-Based Smoothing methods discussed here are Moving Average Filtering and Savitzky-Golay Filtering. While, the Local Regression Smoothing techniques involved here are Lowess and Loess. In this type of smoothing, Robust Smoothing and Upper-and-Lower Smoothing are also explained deeply, related to Lowess and Loess. Finally, the Kernel Smoothing Method involves three methods discussed. These are Nadaraya-Watson Estimator, Priestley-Chao Estimator, and Local Linear Kernel Estimator. The advantages of all above methods are discussed as well as the disadvantages of the methods
Desain dan Implementasi Web Proxy dan VPN Akses (Studi Kasus di Undip)
Full text linkThe development of computer and network technologies lead many organizations to expand its network. The intranet network is used initially to connect clients with geographically dispersed enterprise networks, but when it is need a more extensive and huge network intranets are not possible anymore, it is necessary development of a secure private network that uses Internet network. Methodology of research for this final task include the study of literature, design systems, and testing of the system. In the literature study used research methods from the literature study reference books that are related. The design of this final task using OpenVPN and Glype Proxy to access the local network from the Internet. Last is the testing of this network system, where in this stage the network system will be tested in order to create a reliable network and secure. The result obtained is a network system that allows users from outside the network can access some or all services available on the local network as still in a network, from anywhere via the Internet. For Internet users to become members of this private network they must go through the process of authentication, the data available on the private network is encrypted so it can not b
Pengukuran Kesenjangan Digital di Institusi Pemerintah Daerah (Studi Kasus: Pemerintah Kota Semarang)
Full text linkThe rapid growth of information and communication technology (ICT) facilitate human activity. Along with this rapid development, emerge a gap between individuals who have access to technology and those whose not. This is what we called the digital divide. The main challenges of e-government development are the ability and readiness of management not only the technology. The skill divide between human resources in the government will certainly affect the implementation of e-government in Indonesia.The purpose of this study was to determine the factors that influence the digital divide between individuals in the government, to measure the condition of the digital divide between the current individual in government
Rancang Bangun Sub-sistem Informasi untuk Pencatatan Transaksi di Program Studi Sistem Komputer Undip
Full text linkCurrently in Computer Systems Engineering, Faculty of Engineering, Diponegoro University, Semarang, all records of financial transactions are still using Microsoft Excel and Microsoft Word. It can be assumed that to make a statement of financial performance is very difficult, both statements of cash receipts and cash disbursements report. It should be made a software for reporting financial performance can be monitored by the Head of Department and staff are entitled, at a moment's financial performance reports can be monitored and printed quickly, easily and accurately.This research is conducted by methods such as by literature study, system design and testing of the system. In the literature study used methods of research library of reference books related. The design of this study using a Rapid Application Development (RAD) so easy to develop applications. Applications are also made so easily accessible web-based and maintained (maintenance), because the application is placed on the server side. To secure information from unauthorized users, multi-user application created with the login system.The expected result is a sub-information systems for recording transactions and reporting financial performance can easily monitor and printed at any time needed