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Lontar Komputer: Jurnal Ilmiah Teknologi Informasi

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Published by Universitas Udayana

ISSN : 20881541 EISSN : 25415832 DOI : 10.24843/LKJITI

Core Subject : Science,

Computer Science & IT

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 7 Documents

Search results for , issue "Vol. 10, No. 3 December 2019" : 7 Documents clear

Query Suggestion Pada Drugs e-Dictionary Menggunakan Algoritma Levenshtein Distance Halimah Tus Sadiah; Muhamad Saad Nurul Ishlah; Nisa Najwa Rokhmah
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 10, No. 3 December 2019
Publisher : Institute for Research and Community Services, Udayana University

Dictionary of medicine in the form of a thick book has many disadvantages, one of which is impractical. This is the reason for Indonesian developers to create drugs e-Dictionary. But the drugs e-Dictionary that has been developed is still in the form of a letter index so that users must search the terms one by one in sequential order. This has become so inefficient and ineffective that it is necessary to add a search function and query suggestion feature to the drug e-dictionary. The purpose of this study is to build a query suggestion facility on drugs e-Dictionary using the Levenshtein Distance algorithm. The stages of this research consist of the Development of web-based drugs e-Dictionary, Implementation of the Levenshtein Distance Algorithm, Query Suggestion Testing, and Usage. Based on the results of the implementation of the Levenshtein Distance algorithm and test results, Drugs e-Dictionary can evaluate words that are not in the database. The query suggestion function works by producing the closest word output contained in the database.

Chunking Phrase to Predict Pause Break in Pontianak Malay Language Arif Bijaksana Putra Negara; Yulia Magdalena; Rudy Dwi Nyoto; Herry Sujaini
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 10, No. 3 December 2019
Publisher : Institute for Research and Community Services, Udayana University

Pause break is one of the indicators of speech to be easily understood in the Text-to-Speech System. This research aims to improve the accuracy of pause prediction in Pontianak Malay Language Sentences based on earlier research using a chunking phrase. This research is done as one of the efforts to preserve Pontianak Malay Language in order not to become extinct as a local language. Chunking method uses RegexpParser function in Natural Language Toolkit to crop sentences into phrases based on the Part of Speech type. In this research, the authors have developed a new grammar and pause break rule that is different from the earlier research to increase the accuracy of pause prediction. The data used is 500 Pontianak Malay Language sentences that have been recorded by a Pontianak Malay Language native speaker to get the pause break analysis. The pause consists of a short pause (symbolized as “/1) and a long pause (symbolized as “/2”). The tests were a test of pause break compatibility in one sentence and a test using f-measure, recall, and precision parameters. Based on the tests that have been done, the new grammar rule and pause break rule from this research have a better prediction accuracy than the earlier research with the correct predictive value of sentences increasing by 23% from the earlier rule.

Buildings Cracks Classification Using Zoning and Invariant Moment Features and Quadratic Discriminant Analysis Classifier I Gede Pasek Suta Wijaya; Ida Bagus Ketut Widiartha; Fitri Bimantoro; Aldian Wahyu Septiadi
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 10, No. 3 December 2019
Publisher : Institute for Research and Community Services, Udayana University

Natural disasters such as earthquake often cause cracks in buildings and even demolish them. The cracked building must be assessed by an expert to determine whether the building is still suitable for use or not. The feasibility of a building is assessed based on the width, depth, and length of cracks in walls, beams, columns, and even the floor of the building. Only experienced experts can do such kind of task so that building assessment requires many structural engineering experts when an earthquake has happened. However, structural engineering experts are limited which able to do buildings assessment in the area affected. Therefore, the research based on a pattern recognition approach is conducted to classify cracks in buildings to be mild, moderate, or severe. It will be part of automatic building assessment based on the crack analysis. An alternative pattern recognition approach for classifying buildings cracks is a scheme based on zoning and shape features and Quadratic discriminant analysis (QDA) classifier. Based on the experimental results the proposed scheme gives reasonable achievement more than 80% of accuracy.

Analisis Unjuk Kerja Komunikasi LoRa End Device Yosefine Triwidyastuti
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 10, No. 3 December 2019
Publisher : Institute for Research and Community Services, Udayana University

LoRa is an emerging communication technology that can be used in any field. Many types of research have analyzed LoRa network using a gateway and several end devices to many monitoring applications. However, the communication performance between LoRa end devices only has not been evaluated. This research tested a LoRa communication between two end devices in a point-to-point topology. From the experiment results with various payload lengths, the optimum payload is only 48 bytes with the default module configuration. Longer payload resulted in a decreased performance. Thus, this research implemented a waiting protocol that can increase the Packet Reception Ratio of 100-byte payload from 49.87% to 97.52%.

Data Transmission Method on a Room Condition Telemonitoring Application (IoT) Midriem Mirdanies
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 10, No. 3 December 2019
Publisher : Institute for Research and Community Services, Udayana University

Data transmission system in IoT applications such as telemonitoring, using cable or wireless, requires a robust data transmission method. In this paper, a room condition telemonitoring application has been made where all data are read from raspberry pi, and sent to a pc server every minute using LAN and Wifi media, then update to a webserver. The data are sent using the method proposed in this paper which using the UDP mechanism with several improvements. Experiments have been done using LAN and Wifi, and it is found that the data can be received perfectly, although there are interferences from communication media. The average processing time on a raspberry pi is 19 ms, while the average processing time on the pc server is 5 us. In addition, the average processing speed of the transmission data from raspberry pi to a pc server until ack is received by raspberry pi using LAN media is 0.04 second, while using Wifi media is 0.08 seconds. Based on the experiments, it was found that the proposed method was successfully implemented in the room condition telemonitoring.

Forensic Investigation Framework on Server Side of Private Cloud Computing Didik Sudyana; Nora Lizarti; Erlin Erlin
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 10, No. 3 December 2019
Publisher : Institute for Research and Community Services, Udayana University

Cloud Computing is one of the technologies that continue to develop and progress in rapid adoption rates due to the various benefits and conveniences offered. Cloud Computing has four types of adoption models, one of which is a Private model and is widely adopted by users because it is safer and customizable. The high level of cloud computing adoption is an opportunity for criminals to use cloud computing in committing their crimes and requires handling digital forensics. However, each cloud model has different characteristics, so the investigative method used is also different. Then there is no specific guidance for investigating cloud computing. So it is necessary to analyse the investigation of private cloud computing that used OwnCloud from the server-side and develop the novel investigation framework based on SNI 27037: 2014. An analysis of investigations is performed to develop the novel investigation framework and to find out what evidence can be found based on the novel framework. The results of the research conducted can be a reference for investigators to conduct forensic investigations in cloud computing on the server-side and the novel investigation framework will become a reference to be used as a guide to the investigation on private cloud computing in the server-side.

Development of Graphical Interface System for Inverted Pendulum Stabilization Erwin Susanto
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 10, No. 3 December 2019
Publisher : Institute for Research and Community Services, Udayana University

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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Editorial Address Research institutions and Community Service, University of Udayana, Kampus Bukit Jimbaran Bali

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Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
lontarkomputer@unud.ac.id

Editorial Address
Research institutions and Community Service, University of Udayana, Kampus Bukit Jimbaran Bali

Location
Kota denpasar,

Bali

INDONESIA