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Lontar Komputer: Jurnal Ilmiah Teknologi Informasi
Published by Universitas Udayana
ISSN : 20881541     EISSN : 25415832     DOI : 10.24843/LKJITI
Core Subject : Science,
Lontar Komputer [ISSN Print 2088-1541] [ISSN Online 2541-5832] is a journal that focuses on the theory, practice, and methodology of all aspects of technology in the field of computer science and engineering as well as productive and innovative ideas related to new technology and information systems. This journal covers research original of paper that has not been published and has been through the double-blind reviewed journal. Lontar Komputer published three times a year by Research institutions and community service, University of Udayana. Lontar Komputer already indexing in Scientific Journal Impact Factor with impact Value 3.968. Lontar Komputer already indexing in SINTA with score S2 and H-index 5.
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Articles 147 Documents
RANCANG BANGUN WEB IKLAN BERBASIS MOBILE Sukarsa, Made; Rupayana, Gede Made
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 2, No. 1 Juni 2011
Publisher : Research institutions and Community Service, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (651.413 KB)

Abstract

Teknologi periklanan semakin berkembang saat ini. Iklan saat ini tidak terbatas pada iklan-iklan yang dimuat pada media cetak seperti surat kabar, majalah dan papan-papan reklame yang dipasang di pinggir-pinggir jalan, ataupun media elektronik seperti televisi dan radio, tetapi sudah mulai merambah ke dunia maya. Layanan web iklan baris berbasis mobile adalah layanan berbasis SMS gateway yang digunakan untuk melakukan pendaftaran iklan melalui SMS dan mempublikasikan iklan yang dipasang di internet. Layanan ini diimplementasikan dalam bahasa pemrograman Delphi 7.0 untuk aplikasi SMS gateway, PHP untuk layanan web dan J2ME untuk aplikasi mobile. Manfaat dari layanan ini adalah tersedianya fasilitas SMS iklan berbasis SMS gateway, tersedianya situs untuk publikasi dan memanipulasi data iklan di internet.
Experimental Investigation of Frozen Solid State Drive on Digital Evidence with Static Forensic Methods Riadi, Imam; Umar, Rusydi; Nasrulloh, Imam Mahfudl
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 9, No. 3 December 2018
Publisher : Research institutions and Community Service, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (596.776 KB) | DOI: 10.24843/LKJITI.2018.v09.i03.p06

Abstract

The rapid development of computer technology in hardware, is currently developing non-volatile computer storage media Solid State Drive (SSD). SSD technology has a faster data access speed than Hard Disk and is currently starting to replace Hard Disk storage media. Freezing software on computer systems is often carried out by computer technicians, because it can save a computer maintenance costs due to errors, be exposed to computer viruses or malware. This software is used to prevent unwanted changes to the computer system, when the computer is restarted changes that occur in the computer system will not be stored on storage media. When this happens, what should be done by digital forensic investigators. This study discusses experimental forensic investigations on SSD media storage with frozen conditions or in this study said the frozen SSD. Frozen SSD is the condition of the drive that is locked so that there is no change in the computer system. Software used to lock and prevent changes such as Deep Freeze, Shadow Defender, Windows Steady State, and Toolwiz Time Freeze. Forensic research stages using methods NIST. The result shows that from comparative analysis conducted with Deep Freeze the results of the RecoverMyFile gives 76.38% and Autopsy gives 75,27%, while frozen condition with Shadow Defender the results of the RecoverMyFile gives 59.72% and Autopsy gives 74.44%. So the results of this study indicate the drive freezing software has an effect obtained can be an obstacle in the digital forensic process.
AUTOMATIC IMAGE ANNOTATION MENGGUNAKAN METODE BLOCK TRUNCATION DAN K-NEAREST NEIGHBOR Khrisne, Duman Care; Putra, Darma
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 4, No. 1 April 2013
Publisher : Research institutions and Community Service, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1291.53 KB)

Abstract

Sistem temu kembali citra digital berbasis text sangat bergantung pada label dari gambar digital. Dalam penelitian ini, diterapkan gabungan beberapa metode untuk pelabelan sebuah gambar secara otomatis, istilah yang sering digunakan adalah automatic image annotation, teknik ini digunakan untuk menghasilkan label pada gambar agar dapat melakukan pencarian dengan semantik yang diambil dari objek dalam gambar. Automatic image annotation dimulai dengan melakukan segmentasi terhadap gambar dan untuk setiap segmen gambar dilakukan ekstraksi fitur warna dan tekstur, fitur ini dinormalisasi dan disimpan kedalam basis data untuk data latih, data latih yang telah terkumpul dilatih menggunakan metode learning vector quantization. Bobot yang didapat dari hasil pelatihan digunakan untuk melakukan klasifikasi terhadap segmen gambar ke kosa kata hasil terjemahannya. Hasil dari penelitian ini adalah kesimpulan bahwa automatic image annotation dapat dicapai dengan gabungan metode yang diusulkan dan dapat memberi performa hasil anotasi yang bagus, dimana akurasi sistem adalah 73,26 % saat menggunakan K-NN dengan k = 5.
Rancang Bangun Sistem Pilkades Menggunakan Teknologi Smart Card Sebagai Kartu Pemilih Indra Permana, I Putu; Putra, I Ketut Gede Darma; Sasmita, I Gusti Made Arya
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 7, No. 2 Agustus 2016
Publisher : Research institutions and Community Service, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (656.572 KB) | DOI: 10.24843/LKJITI.2016.v07.i02.p02

Abstract

Pemilihan Kepala Desa (Pilkades) merupakan proses yang tidak terpisahkan dari Negara Indonesia sebagai negara demokrasi. Pilkades saat ini masih menggunakan sistem pemungutan suara (voting) secara konvensional, menggunakan media kertas untuk melakukan proses pemilihan. Pelaksanaan sistem voting konvensional tersebut mempunyai banyak kelemahan seperti menghitung hasil voting relatif lebih lama dan menggunakan perhitungan manual. Perkembangan dan kemajuan teknologi informasi saat ini dapat dimanfaatkan untuk mendukung pelaksanaan voting Pilkades secara lebih baik yang menjadi solusi cerdas akan kemajuan teknologi yang dapat menggantikan sistem voting konvensional, yaitu dengan media sistem elektronik voting (e-voting) menggunakan teknologi smart card sebagai kartu pemilih. Sistem dikemas dalam bentuk aplikasi yang dipasang/di-install pada komputer dan reader/writer tools sebagai media untuk membaca/menulis pada smart card. Sistem e-voting Pilkades dengan teknologi smart card telah berhasil dijalankan dan menghasilkan dashboard hasil voting Pilkades dengan menunjukkan jumlah voting dalam bentuk angka, persentase (%), grafik dan diagram.
Intelligent Fuzzy Logic - Cuckoo Search Algorithm Method for Short-Term Electric Load Forecasting in 150 kV Sulselrabar System Djalal, Muhammad Ruswandi; Faisal, Faisal
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 8, No. 3 Desember 2017
Publisher : Research institutions and Community Service, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (589.76 KB) | DOI: 10.24843/LKJITI.2017.v08.i03.p02

Abstract

Forecasting the electrical load becomes important, because it can estimate electricity consumption over a certain time range. Accuracy in electric load forecasting can improve safety and reliability in the operation of power systems such as load flow, maintenance of generating units and scheduling of generating units. In this study used case study system Sulselrabar, which is currently growing, but still not much to discuss about the condition of the current system and which will come. Several methods for predicting electrical loads have been widely used, ranging from conventional to smart-based methods. In this research will be proposed method of artificial intelligence for forecasting Short Term load on Sulselrabar system. The method used is based Fuzzy Logic and Cuckoo Search Algorithm. The combination of Fuzzy logic and Cuckoo Search methods is chosen because the combination of both optimizes optimum fuzzy logic membership, so the forecasting results have a very small error. From the results of the research can be concluded that the result of load forecasting using Fuzzy Logic method optimized using Cuckoo Search Algorithm (FL-CSA) is better than Fuzzy Logic that is not optimized. The analysis results using input data 3 months before day H, to predict the load for one week on January 1 to 7 january 2014, and as a comparison used the predicted day H data. From the simulation results, the mean absolute percentage error (MAPE) is smaller using FLCSA, for the smallest MAPE on 1 January 2014 of 0.06785208%. While the highest MAPE on January 4, 2014 amounted to -0.44973%.
CUSTOMER SEGMENTATION DENGAN METODE SELF ORGANIZING MAP (STUDI KASUS: UD. FENNY) Bagus Ariana, A. A. Gde
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 2, No. 1 Juni 2011
Publisher : Research institutions and Community Service, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (552.735 KB)

Abstract

Saat ini persaingan bisnis pada perusahaan retail tidak hanya dengan menggunakan perangkat sistem informasi namun sudah dilengkapi dengan sistem pendukung keputusan. Salah satu metode sistem pendukung keputusan yang digunakan adalah data mining. Data mining digunakan untuk menemukan pola-pola yang tersembunyi pada database. UD. Fenny sebagai perusahaan retail ingin menemukan pola segmentasi pelanggan dengan menggunakan model RFM (Recency, Frequency, Monetary). Metode data mining untuk melakukan proses segmentasi adalah metode clustering. Clustering merupakan proses penggugusan data menjadi kelompok-kelompok yang memiliki kemiripan secara tidak terawasi (unsupervised). Sebelum melakukan proses clustering, dilakukan proses persiapan data dengan membuat datawarehouse menggunakan skema bintang (star scema). Selanjutnya dilakukan proses clustering dengan menggunakan metode Self Organizing Map (SOM/Kohonen). Metode ini merupakan salah satu model jaringan saraf tiruan yang menggunakan metode unsupervised. Dari hasil percobaan metode SOM melakukan proses clustering dan menggambarkan hasil clustering pada SOM plot. Dengan melakukan proses clustering, pihak pengambil keputusan dapat memahami segmentasi customer dan melakukan upaya peningkatan pelayanan customer.
MONITORING SPESIFIKASI DAN UTILITAS HOST DI JARINGAN KOMPUTER BERBASIS WEB Piarsa, I Nyoman; Togantara, Putu Bayu Suda
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 3, No. 2 Desember 2012
Publisher : Research institutions and Community Service, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (367.955 KB)

Abstract

Sistem monitoring spesifikasi dan utilitas menggunakan protocol SNMP untuk melakukanpengkoleksian data dari host. Sistem ini merupakan sistem monitoring berbasis web yang dapatmelakukan monitoring terhadap spesifikasi hardware seperti CPU resources, memoryresources, job progress, running proses serta kapasitas hardisk. Sistem juga menyediakanfasilitas power control yang berfungsi untuk mematikan maupun merestart host yangdimonitoring dan fasilitas manajemen proses yang digunakan untuk melihat dan mematikanproses apa saja yang sedang berjalan pada host.
Road Quality Assessment Using International Roughness Index Method and Accelerometer on Android Setiawan, Eko Budi; Nurdin, Hadi
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 10, No. 2 August 2019
Publisher : Research institutions and Community Service, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (675.48 KB) | DOI: 10.24843/LKJITI.2019.v10.i02.p01

Abstract

The quality of road conditions can determine comfort in driving. To find out the condition of a road whether it has good surface quality, it can use an accelerometer sensor contained in an android smartphone. This research uses the International Roughness Index (IRI) method combined with the accelerometer sensor and the Global Positioning System (GPS). Application of the results of this study can be used to facilitate the contractor maker and road repair, so they can find out which points need to be repaired. Testing is done using two different vehicles, car and motorcycle. Smartphones with road quality detection applications are attached to the car and motorcycle vehicles using a phone holder. This is to record vibration that occurs while the vehicle is moving based on road conditions. The vibration recording results are then validated in a visual observation to determine the accuracy of the assessment results. Based on the test results the level of accuracy on the car is 90% and the motorcycle is 30%.
Pengenalan Tradisi Budaya Bali melalui Aplikasi Game Explore Bali Berbasis Android Sanjaya, Dewa Putu Andre; Purnawan, I Ketut Adi; Rusjayanthi, Ni Kadek Dwi
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 7, No. 3 Desember 2016
Publisher : Research institutions and Community Service, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (885.851 KB) | DOI: 10.24843/LKJITI.2016.v07.i03.p04

Abstract

Development of Information Technology is very important for human life, one technology that is currently growing very rapidly in the form of smartphone technology is mainly based on Android. The Android platform has become very popular, the game developers seriously take it. Game is one of the entertainment media, but this time the game can be as one media introduction Cultural Traditions Bali. Game Explore Bali is designed to introduce the Bali Cultural Traditions in seven cities in Bali Province. Traditions introduced in the game consists of Ngerebong (Denpasar), Mekotek (Badung), Okokan (Tabanan), Makepung (Jembrana), Ngedeblag (Gianyar), Megibung, Terteran, Gebug Ende (Karangasem) and Ngocang, Bukakak (Buleleng) through a description and picture information. Based on the analysis by using a questionnaire that tested on 30 children for most of the samples. User knowledge about the Bali Cultural Traditions increased by 74% from the initial percentage of 67% through the information displayed on the Game Explore Bali.
Development of Graphical Interface System for Inverted Pendulum Stabilization Susanto, Erwin
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 10, No. 3 December 2019
Publisher : Research institutions and Community Service, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (535.308 KB) | DOI: 10.24843/LKJITI.2019.v10.i03.p03

Abstract

Currently, most of basic control engineering lectures teach both mathematic model and control of an inverted pendulum to explain stability problems in dynamic systems. The inverted pendulum system is a pendulum controlled with a certain force in order to stand in balance around vertical equilibrium line. Hence this system is a highly unstable system and needs stabilization methods using a kind of controller. This paper describes how to design a Proportional Derivative Integral (PID) controller via root locus technique to stabilize it and realization of its interface system for monitoring angle trajectory. This visualization is needed to observe the stability and effectiveness of its mathematic model and control design. Experimental results and analysis show that control design and interface system can be implemented well.

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