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HENGKI TAMANDO SIHOTANG
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Jurnal Mantik
Published by Institute of Computer Science
ISSN : -     EISSN : 26854236     DOI : -
Core Subject : Economy, Science, Education,
Computer Science & IT Economics, Econometrics & Finance Languange, Linguistic, Communication & Media
Jurnal Mantik (Manajemen, Teknologi Informatika dan Komunikasi) is a scientific journal in information systems/informati containing the scientific literature on studies of pure and applied research in information systems/information technology,Comptuer Science and management science and public review of the development of theory, method and applied sciences related to the subject. Jurnal Mantik Penusa is published by Institute of Computer Science (IOCS). Editors invite researchers, practitioners, and students to write scientific developments in fields related to information systems/information technology,Comptuer Science and management science). Jurnal Mantik is issued 4 (FOUR) times a year.
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Articles 2,151 Documents
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Application of File Encryption and Decryption Using One Time Pad Algorithm Muhammad Syahputra Novelan
Jurnal Mantik Vol. 4 No. 3 (2020): November: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol4.2020.1270.pp2348-2353

Abstract

In maintaining a system security, it is very important to pay attention to that, namely an authentication process. This process is carried out in order to ensure that users who access data or information are users who have the right and authority. In authentication, there are several methods, one of which is using data encryption techniques, namely cryptography. Cryptography is implemented in data and information by coding or hiding the original data so that only certain parts have a key that can access the data or information. This research will apply the One Time Pad (OTP) Algorithm based on android which includes data encryption and decryption which will be designed using Android Studio to carry out encryption of stored data or information. The data will be in the form of ciphertext so that the user gets an access key for the data or information. In making this application, it is hoped that it will be useful in maintaining data security and confidentiality.
Grouping of Success Levels in E-Learning Learning Factors: Approaches with Machine Learning Algorithm Elin Panca Saputra; Sugiono; Indriyanti; Supriatiningsih; Hafis Nurdin
Jurnal Mantik Vol. 5 No. 1 (2021): May: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol5.2021.1271.pp78-85

Abstract

The purpose of this study is to obtain the results of the modeling process on grouping the results of student learning, and to produce student success rates, while to find the results of the accuracy level of student learning success based on E-Learning with the Support Vectore Machine (SVM) method. In this grouping, there are 5 clusters. Furthermore, the process of counting can be as many as 2 iterations, namely getting the final result in the form of Cluster-1 with a total of 10 students, cluster-2 with a total of 45 students, cluster-3 with a total of 22 students, cluster 4 with a total of 13 students, and the next is cluster-5 with a total of 19 students. Then the results of the resulting process with a total of 5 types of clusters, namely from students who get the highest results to the lowest. In addition, this study also looks for the level of accuracy in e-learning student learning processes using the Support Vectore Machine (SVM) method, the accuracy results obtained are 90.91%, while the AUC results are 82.81%. then the value of the calculated accuracy rate can be classified as accuracy with the predicate result that is good.
Implementation of Web-Based Waterfall Method Case Study Information System Complaints of Violence Women and Children Syahril Andika Siregar; Deci Irmayani; Musthafa Haris Munandar
Jurnal Mantik Vol. 5 No. 1 (2021): May: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol5.2021.1274.pp86-92

Abstract

Violence is any act of abuse of physical strength with or without the use of means against the law and causing harm to the body, life and freedom of people. Violence against women and children is a violation of human rights that can happen to anyone, across social, economic and educational status. The process of complaints of violence against women and children, which is currently mostly carried out, is still manual with victims / communities coming directly to the complaint center to make a complaint report. To support the research, the method used in making the Information System for Complaints on Violence against Women and Children is waterfall and the UML model used is the Php programming language, MySql Database, Boostrap, Sublime Text. The results of the study resulted in the implementation of complaints of violence against women and children based on reports of victims / communities affected by violence. Data on complaints of violence against women and children. can provide complete and accurate information in accordance with the complaint desired by the victim and printed as the last step in the process of managing victim complaint data.
Application of Webgis Distribution Location Puskemas in Labuhanbatu District Muhammad Wahyu Tambunan; Ibnu Rasyid Munthe; Gomal Juni Yanris
Jurnal Mantik Vol. 5 No. 1 (2021): May: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol5.2021.1277.pp98-103

Abstract

The community finding a place for health services is difficult, so a research was conducted in the form of creating a puskesmas map application to assess the puskesmas in Labuhanbatu Regency. Since this research has gone well, Labuhan Regency people can know the information and help them find health centers faster after this webgis is installed. Study of the life cycle of system development using SDLC (Systems Development Life Cycle) using UML to design spatial information systems to help solve problems. This will help the public to locate the nearest health center.
Deployment of Webgis Spread Location Natural Resources of Labuhanbatu Regency Sigit Prasetyo Nugroho; Ibnu Rasyid Munthe; Syaiful Zuhri Harahap
Jurnal Mantik Vol. 5 No. 1 (2021): May: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol5.2021.1278.pp104-108

Abstract

Natural resources abound in the Labuhanbatu region of North Sumatra. Natural resources are plentiful in the district. The labuhanbatu were unaware of their abundance of natural resources. We will establish dominion over Labuhanbatu's location and abundance of natural resources. Utilizing Geographic Information Systems (or GIS, as it is more commonly known) in an ever-changing internet environment. People are constantly seeking access to data, and the Labuhanbatu community will benefit from GIS (Geographic Information System). Create an interactive map of the subdistrict's natural resources for the benefit of nearby residents. Collecting data in a GIS may or may not be easy. Additionally, horticulture, poultry, plantations, and fisheries are included, as are natural resources that benefit the soil.
Effect of Promotion, Price and Product Quality Toward Buying Decision Khomeiny Yunior; Calvin Chang; Kangga Ega Williyandi; Ivan Leonardo Salim; Lisa Anwar
Jurnal Mantik Vol. 5 No. 1 (2021): May: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol5.2021.1281.pp109-115

Abstract

This study examines and analyzes the effect of promotion, price and product quality on buying decisions in PT. Bintang Agung Sukses, a company engaged in the distribution of consumer goods. This research uses the explanatory research method. The number of customer populations is 167 stores and individuals, with the calculation of the Slovin formula, a sample of 118 respondents was determined. The instrument used to conduct this research is a questionnaire which will first be tested for validity and reliability and then will test the quantitative sample data first using multiple regression. The results of processing simultaneously and partial promotion, price and product quality affect the buying decision at PT. Bintang Agung Sukses with the amount of variation that can be explained is 36.1% and the remaining 63.9% is explained by other factors
Classification of Covid-19 Using Feature Extraction GLCM and SVM Algorithm Muhamad Saenudin; Fauzan Haq; Riza Ibnu Adam
Jurnal Mantik Vol. 5 No. 1 (2021): May: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol5.2021.1284.pp179-183

Abstract

Coronavirus Disease (COVID-19) is a new variant of the corona virus that mutates and spreads rapidly between humans. The high rate of transmission and spread is not matched by the fast process of diagnosis because it has to go through a polymerase chain reaction (PCR) test in the laboratory.To identify quickly, efficiently and effectively, then a classification system is used using x-ray images of the chest using the Gray Level Co-occurrence Matrix (GLCM) method and the Support Vector Machine (SVM) algorithm. The data used are digital images of normal chest X-Ray (CXR) diagnosis and positive diagnosis of Covid-19 with 408 training data and 128 test data.  The test is carried out on the GLCM parameters, namely with a distance of d = 1,2,3 and angles , , ,  and feature extraction with contrast, correlation, energy, homogeneity, and dissimilarity.The test results show that the highest accuracy is at the distance d = 1 and the angle ?= is 90.47% and the lowest accuracy is at the distance d = 3 and the angle ? = is 80.35%.
The Effect of Return on Assets, Return on Equity, Debt to Equity Ratio, and Current Ratio on Stock Returns in Companies Listed in the LQ 45 Index on the Indonesia Stock Exchange 2017 - 2019 Desi Nopitasari Hadameon Nainggolan; Widya Andravana Hia; Lorenza Kristi Mona; Ferdinand Napitupulu
Jurnal Mantik Vol. 5 No. 1 (2021): May: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol5.2021.1285.pp116-126

Abstract

The purpose of this study is to observe the effect of ROA, ROE, DER, and CR on stock returns in companies listed in the LQ 45 index on the IDX. Observations used the T test, F test, and used quantitative descriptive. Many populations were used for research, namely 45 companies in the 2017-2018 period and purposive sampling was carried out on this population to obtain samples. There are 31 companies obtained as samples. The data analysis technique used for this study is the multiple linear regression analysis technique. In this study, it shows partially only DER which has a positive and significant effect on stock returns and simultaneously the four variables used have a positive and significant effect on stock returns. In the determination coefficient test, it can be seen that the adjust r square (R2) number is 0,
Analysis of The Utilization and Implementation of Cloud Computing Infrastructure Services on The Azure Microsoft Platform Nur Alamsyah; Nur Imam Febrianto
Jurnal Mantik Vol. 5 No. 1 (2021): May: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol5.2021.1287.pp127-136

Abstract

This final project discusses cloud computing infrastructure services, where cloud computing is the evolution of various computing technologies that have existed since the early 1960s. This final project will discuss cloud computing infrastructure services on the Microsoft Azure platform. Microsoft Azure is a hyperscale cloud computing platform that has many services, one of which is infrastructure as a services. DNS server implementation will be carried out to test the functionality of the Microsoft Azure service. Analysis of the performance of both the processor compute, memory bandwidth, network throughput and storage media performance will be tested and compared with the on-premise system. The applications used for performance testing are LINPACK, STREAM, iperf and also fio. The on-premise system being compared is a virtualization-based system using the VMware vSphere platform and hardware specifications that are made closer to the server specifications on Microsoft Azure. Costs incurred for operations and investment as total cost of ownership of an on-premise infrastructure system with Microsoft Azure infrastructure services will be compared, including the costs required to implement a server on an on-premise system with implementation on Microsoft Azure.
The Effectiveness of Learning Mathematics Through Explicit Instruction Techniques at Santa Maria Private Junior High School Parmonangan Academic Year 2020/2021 Yusniar Nova Tambunan
Jurnal Mantik Vol. 5 No. 1 (2021): May: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol5.2021.1289.pp137-141

Abstract

The purpose of this research is to determine the effectiveness of learning mathematics through the Explicit Intruction technique with the help of Student Worksheets in teaching triangle material. The instruments used to determine the effectiveness of learning mathematics are the initial test, final test, and observation sheets as well as learning indicators in terms of 4 aspects, namely: student mastery level, student learning completeness, completeness of special learning objectives (TPK), student worksheets. The research subjects were all class VIII students of Santa Maria Parmonangan Private Junior High School, totaling 40 people and the research object was student learning outcomes and Student Worksheets (LKPD)The type of research used is descriptive research in the form of an essay. Before the material is taught, a preliminary test is given to determine the students' initial abilities and difficulties. The results of the initial tests show that students have low abilities. Of the 40 students, the percentage results obtained were 75% incomplete and 25% complete with an average of 46.65. Once applied Explicit intruction techniques with the help of Student Worksheets, carried out post-tests with the results of the percentage level of classical student learning completeness is 85% or an average of 69.4 in other words, classical student learning completeness has been achieved. Based on the TPK criteria, there are 4 TPKs. Of the 4 aspects of the effectiveness of mathematics learning, all of them are complete, namely: 80% Student Mastery Level, 85% Student Learning Completeness, 82.5% Completeness of Specific Learning Objectives, 77.5% Student Worksheets.) By applying explicit instruction techniques with the help of Sheets Students work in learning mathematics students on the material triangle student learning outcomes are increased and effective.

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