cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Paska Hasugian
Contact Email
infokum@seaninstitute.org
Phone
+6281264451404
Journal Mail Official
infokum@seaninstitute.org
Editorial Address
Komplek New Pratama ASri Blok C, No.2, Deliserdang, Sumatera Utara, Indonesia
Location
Unknown,
Unknown
INDONESIA
INFOKUM
Published by SEAN INSTITUTE
ISSN : 23029706     EISSN : 27224635     DOI : -
Core Subject : Science,
Computer Science & IT
The INFOKUM a scientific journal of Decision support sistem , expert system and artificial inteligens which includes scholarly writings on pure research and applied research in the field of information systems and information technology as well as a review-general review of the development of the theory, methods, and related applied sciences. Software Engineering. Image Processing Datamining Artificial Neural Networks
Arjuna Subject : Ilmu Komputer (semua kategori) - Kecerdasan Buatan
Articles 833 Documents
 78   79   80   81   82 
Steganography Test for Exif Metadata on JPEG Files With AES-256 Encryption for Secret Message Security Hasan, Yasir
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/infokum.v13i05.2967

Abstract

One of the main challenges is hiding secret messages in media such as JPEG images. However, embedding messages directly into EXIF metadata can pose detection risks and vulnerability to forensic analysis attacks, and this technique faces challenges in security, resistance to metadata manipulation, and message extraction accuracy. The method used in this study involves embedding a message encrypted using AES-256 ECB mode and Base64 into the EXIF metadata of JPEG files, so that only those with the decryption key can access the message content. This system is designed to be compatible with standard image processing software without changing the main structure of the JPEG file, making it difficult to detect by conventional metadata analysis techniques. Test results show that this method is able to embed secret messages with a high level of security without changing the visual quality of the image. AES-256 encryption encoded in Base64 is proven to be effective in maintaining the confidentiality of messages, so that only users with the correct decryption key can access them. Thus, the combination of EXIF metadata steganography and AES-256 encryption in Base64 provides an effective solution for securing secret messages in JPEG files, improving data protection against the threat of information theft and manipulation.
Analysis of Frequency and Voltage Stabilization Control in Low-Inertia Power Systems Using a Boost Converter Renaldo Hotmartua Sinaga; Solly Aryza; Rahmaniar, Rahmaniar
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Low-inertia power systems, especially those based on renewable energy sources such as solar and wind, face major challenges in maintaining frequency and voltage stability. The absence of mechanical inertia in these systems, which is usually available in synchronous generators, makes the system more vulnerable to load changes or network disturbances. Therefore, an effective control method is needed to maintain such stability. This study analysed the frequency and voltage stability control of low-inertia power systems using a Boost Converter. A Boost Converter is used to regulate and stabilize the output voltage of a fluctuating power source, such as a solar panel, by increasing the unstable input voltage. Meanwhile, a frequency control method such as is implemented to imitate mechanical inertia, thus maintaining the frequency at a desired value. The results show that the use of a Boost Converter effectively improves voltage stability, while a VSG-based frequency control strategy successfully imitates the inertia response of a synchronous generator, maintaining a stable frequency despite the system having low inertia. Thus, the combination of these two methods can improve the reliability of low-inertia power systems, especially in applications utilizing renewable energy sources.
Analysis of the Performance Evaluation Study of Generator Excitation Unit in Atik Bakery Factory Kholaful Ahmad Harahap; Parlin Siagian; Haris Gunawan
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Atik Bakery uses a power generation system to meet its operational energy needs, one of which comes from a generator unit that plays an important role in maintaining a stable power supply. One of the key components in generator operation is the excitation system that functions to regulate the generator output voltage. This study aims to evaluate the performance of the generator unit excitation system at Atik Bakery, by analyzing efficiency, voltage stability, and response to changes in load. The methods used include measuring the generator output voltage at various load conditions, as well as monitoring the parameters of the excitation system using measuring devices and data analysis. The results of the study indicate that the generator unit excitation system can maintain a stable output voltage under normal load conditions, but there is a decrease in performance at higher loads, which can affect the quality of power supply to the factory. This evaluation provides a basis for efforts to improve and enhance the performance of the excitation system to improve operational efficiency and stability at Atik Bakery.
Cultural Implementation of Punggahan in the Pujakesuma Organization: a Sociocultural Study in Medan City Prinsi Rigitta
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to determine how the Pujakesuma organization maintains the punggahan tradition as one of the Javanese cultural heritages in Medan City. Punggahan is a Javanese tradition performed before the month of Ramadan as a form of respect for ancestors and self-purification. This study uses a qualitative approach with data collection techniques in the form of participatory observation, in-depth interviews, and documentation. The theories used are Koentjaraningrat's Culturalism and Emile Durkheim's theory of religion as a social institution. The results show that Pujakesuma actively preserves the punggahan tradition by involving all elements of the Javanese community, especially the younger generation, and adapting the form of implementation to remain relevant in the modern era.
Legal Protection for Foreign Investors in Mining Activities According to Regulations Legislation in Indonesia Mygen Flintandyo; Arrum Budi Leksono
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The mining sector is a key pillar of the Indonesian economy, contributing significantly to state revenue and employment. Indonesia's abundant natural resource potential makes it a strategic destination for foreign investors in the mining sector. However, the investment climate in this sector still faces various challenges, such as regulatory uncertainty, expropriation, and legal conflicts. This study aims to analyze the forms of legal protection provided to foreign investors in mining activities in Indonesia. The research method used is a normative juridical approach with a statutory approach. The results show that legal regulations related to foreign investment in the mining sector are based on the principles of legal certainty and fair treatment, strict but transparent licensing, guarantees of ownership and return of capital, and social and environmental obligations. These regulations include provisions related to the legality of business entities, general licensing, and share ownership. Forms of legal protection for foreign investors in the mining sector include protection against nationalization, legal certainty through business permits, fair and equal treatment, and access to national and international dispute resolution mechanisms. All of these instruments aim to build a stable and attractive investment climate for foreign capital.
The Fundamental Concept of Educational Innovation: Through Innovation in Thinking, Environment, Culture, and Behaviour Yuni Wulandari; Tasya, Tasya
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The main objective of national education in general is to improve the quality of human resources (HR) through various educational management processes and educational innovation. This study aims to provide an understanding of the basic concept of innovation in educational management, which includes innovation in thinking, environment, culture, and human behavior. This research is included in the category of library research, which is conducted by reading, reviewing, and examining books and written sources related to issues of educational innovation and educational management. The results of this study reveal that educational management innovation can be achieved through thinking that considers environmental and cultural situations, and focuses on the formation of student behavior and the development of human resources in the world of education to become individuals with morals and professionals. The innovations carried out include the implementation of school-based management, curriculum changes, online-based data collection, and innovations in human resource management. In implementing these innovations, it is necessary to provide quality and innovative human resources, adequate support, and the creation of a conducive climate to support the success of the educational process.
The Influence of Brand Image and Lifestyle on Purchase De-cisions: a Case Study of Specs Footwear Users at Universi-tas Medan Area Tegar Sry Restu’eli Gulo; Muhammad Yamin Siregar
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research aims to analysed the influence of brand image and lifestyle on pur-chase decisions among Specs footwear users at Universitas Medan Area. The study ap-plies a quantitative method using a survey approach. Data were collected through ques-tionnaires distributed to 100 respondents who are active students and users of Specs footwear. The results of the analysis show that brand image has a significant positive influence on purchasing decisions. Likewise, lifestyle also has a significant effect on con-sumer behaviour in choosing Specs products. Simultaneously, brand image and lifestyle jointly contribute significantly to the decision-making process. These findings indicate that both variables are important considerations for companies in formulating marketing strategies that are aligned with consumer perceptions and lifestyles. This research con-cludes that enhancing brand image and understanding consumer lifestyle are key factors in increasing purchasing decisions.
Decision Support System for Determining Infrastructure Project Priorities Using AHP and TOPSIS Methods in Deli Serdang Regency Sihotang, Jonhariono; Napitupulu, Dea Okviar Egano
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Prioritizing infrastructure projects is a major challenge in regional development planning, particularly when faced with limited resources and complex assessment criteria. This study aims to design a decision support system that can assist policymakers in determining the most deserving infrastructure projects for prioritization. The method used is a combination of the Analytic Hierarchy Process (AHP) to determine criteria weights and the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) to rank alternative projects. Five main criteria are used in this study: cost, urgency, social benefits, land readiness, and conformity with the Regional Medium-Term Development Plan (RPJMD). This study uses simulation data on ten alternative infrastructure projects in Deli Serdang Regency. The AHP results show that urgency (29.9%) and conformity with the RPJMD (25.6%) are the criteria with the highest weights. The consistency value (CR = 0.0333) indicates that the criteria assessment is carried out consistently. Through TOPSIS, it was found that the Health Center B Development project had the highest preference value (0.8176), followed by Terminal I Revitalization and Connecting Bridge E. This study proves that the integration of the AHP and TOPSIS methods is able to provide a rational, transparent, and applicable decision-making framework in the context of regional infrastructure development planning.
Analysis of the Implementation of a Smart Fire System On/Off Prototype Using a Solenoid Valve and Notification Based on Arduino Uno Suhardi Siagian; Solly Aryza; Hamdani, Hamdani
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Fire detection and prevention systems are important aspects in maintaining environmen-tal security, both at home and in public facilities. This study aims to develop and analyze the implementation of an Arduino Uno-based Smart Fire System On/Off prototype equipped with a solenoid valve for automatic fire extinguishing and application-based notification. This system consists of a temperature and smoke sensor as the main detec-tor, an Arduino Uno as a controller, a solenoid valve to regulate water flow, and a com-munication module to send notifications to users. Tests were conducted to evaluate the system's response speed, detection accuracy, and the effectiveness of the automatic fire extinguishing mechanism. The results show that this system is able to detect potential fires with 95% accuracy and provide notifications to users in less than 5 seconds after detection. In addition, the solenoid valve is successfully activated automatically to extin-guish the fire with a success rate of up to 90%. This prototype shows potential for im-plementation as an efficient fire safety solution, especially at the household and small business scale.
Analysis of Service Quality, Price and Customer Trust Towards Customer Satisfaction at Haji Mahmud Mushroom Chicken Noodles Medan Irma Hajira; Nurafrina Siregar; Erwansyah, Erwansyah
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to analyze the influence of service quality, price, and customer trust on customer satisfaction at Haji Mahmud Mushroom Chicken Noodles in Medan. The research uses a quantitative approach with a survey method. Data were collected through questionnaires distributed to 100 respondents who are customers of the restaurant. The data were then analyzed using multiple linear regression analysis to examine the relationship between the independent variables (service quality, price, and trust) and the dependent variable (customer satisfaction). The results of the analysis show that service quality, price, and customer trust have a positive and significant effect on customer satisfaction either partially or simultaneously. Among the three variables, customer trust has the most dominant influence on satisfaction. These findings indicate that maintaining service quality, offering competitive prices, and building customer trust are crucial strategies to enhance satisfaction and customer loyalty at Haji Mahmud Mushroom Chicken Noodles Medan.

Page 80 of 84 | Total Record : 833

 78   79   80   81   82 

Filter by Year

2018 2025


Reset
Filter By Issues
All Issue Vol. 13 No. 06 (2025): Infokum Vol. 13 No. 05 (2025): Infokum Vol. 13 No. 04 (2025): Infokum Vol. 13 No. 03 (2025): Infokum Vol. 13 No. 02 (2025): Infokum Vol. 13 No. 01 (2025): Infokum Vol. 12 No. 04 (2024): Engineering, Computer and Communication, November 2024 Vol. 12 No. 01 (2024): Engineering, Computer and Communication, Edition January 2024 Vol. 11 No. 05 (2023): Engineering, Computer and Communication Vol. 11 No. 04 (2023): Agustus : Engineering, Computer and Communication Vol. 11 No. 03 (2023): Juni : Engineering, Computer and Communication Vol. 11 No. 02 (2023): April, Engineering, Computer and Communication Vol. 10 No. 03 (2022): August, Data Mining, Image Processing, and artificial intelligence Vol. 10 No. 02 (2022): Juni, Data Mining, Image Processing, and artificial intelligence Vol. 10 No. 5 (2022): December, Computer and Communication Vol. 10 No. 4 (2022): October, computer, information and engineering Vol. 10 No. 1 (2021): Desember, Data Mining, Image Processing, and artificial intelligence Vol. 9 No. 2, June (2021): Data Mining, Image Processing and artificial intelligence Vol. 9 No. 1,Desember (2020): Data Mining, Image Processing,artificial intelligence, networking Vol. 8 No. 2, Juni (2020): Data Mining, Image Processing and artificial intelligence Vol. 8 No. 1, Desembe (2019): Data Mining,Image Processing and artificial intelligence Vol. 7 No. 2, Juni (2019): Data Mining And Image Processing Vol. 7 No. 1, Desembe (2018): Data Mining And Image Processing More Issue