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Dodi Siregar
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JiTEKH (Jurnal Ilmiah Teknologi Harapan)
Published by Universitas Harapan Medan
ISSN : 23385677     EISSN : 25496646     DOI : 10.35447
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Mechanical Engineering
JITEKH merupakan jurnal ilmiah yang menyajikan artikel orisinal tentang pengetahuan dan informasi riset atau aplikasi riset dan pengembangan terkini dalam bidang keteknikan dan teknologi informasi. Ruang lingkup Jurnal JITEKH meliputi bidang Informatika, Teknik Mesin, Teknik Elektro, Sistem Informasi, Teknik Industri dan Teknik Sipil. Focus and Scope: Design Manufacture Konversi Energi Material Data analysis Natural Language Processing Artificial Intelligence Neural Networks Pattern Recognition Image Processing Genetic Algorithm Bioinformatics/Biomedical Applications Biometrical Application Content-Based Multimedia Retrievals Augmented Reality Virtual Reality Information System Game Mobile Data mining Artificial Intelligence Sistem Pendukung Keputusan IT Bussiness Incubation IT Governance Cloud Computing Dessision Support System Instrumentation and Control Electrical (Power) Electronics Engineering Industrial Engineering Optimasi Sistem Produksi Perencanaan Produksi dan Pengendalian Persediaan Penjadwalan dan Manajemen Operasi/Proyek Computer-Integrated Manufacturing System Sustainable Product Design and Manufacturing Penelitian Operasional dan Decision-Making Model Manajemen Teknologi Pengukuran Kerja, Faktor-Faktor Manusia dan Ergonomi Rekayasa dan Pengendalian Kualitas Sistem Logistik dan Supply Chain Management Perancangan dan Pengembangan Produk Concurrent Engineering Analisis Ekonomi Teknik Pemodelan Sistem dan Analisis Simulasi Perancangan Layout Fasilitas Knowledge Management Reliability and Maintenance Engineering Sistem dan Teknologi Informasi Rekayasa Pelayanan (Service Engineering) Technopreneurship dan Inovasi Aplikasi Model Stokastik dalam Teknik Industri Aplikasi Metode Metaheuristik dalam Teknik Industri Building Materials and Structures Constructions Technology Constructions Economy and Management Earthquake Engineering Environmental Engineering Renovation of Buildings Geotechnical Engineering Highway Engineering Hydraulic and Hydraulic Structures Road and Bridge Engineering Structural Engineering Surveying and Geo-Spatial Engineering Transportation Engineering Tunnel Engineering Urban Engineering and Economy Water Resources Engineering Urban Drainage
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 6 Documents
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Search results for , issue "Vol. 12 No. 1 (2024): March 2024" : 6 Documents clear
Analisis Karotenoid dan Glukosa pada Produksi Serbuk Jahe Merah (Zingiber officinale Rosc. var Rubrum) terhadap Variasi Suhu dan Kadar Gula Nuramalia, Rachma Nisa; Sari, Dessy Agustina
JiTEKH Vol. 12 No. 1 (2024): March 2024
Publisher : Universitas Harapan Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35447/jitekh.v12i1.829

Abstract

This study aims to analyze total carotenoids and total sugar in red ginger powder products by involving variations in sugar content and process temperature. The process of making red ginger powder utilizes an evaporation process with rock sugar as a crystallization agent to help the crystallization process. The raw material is red ginger as the main material, both fresh and pulp. Then, the variables during the study were operating temperature (80 and 90oC) and sugar content (60 and 100%). The parameters analyzed were total carotenoids and total sugar in the red ginger powder samples. The results of the total carotenoid analysis showed that the treatment of red ginger with a temperature of 90oC and 60% rock sugar content provided optimum conditions both in terms of fresh raw materials and pulp. This result was also achieved in red ginger powder and ready-to-consume beverage products, which ranged from 11.70 to 16.23%. Furthermore, the best total glucose analysis results were at the same temperature as the highest carotenoid values. Meanwhile, the highest sugar content (100%) was able to provide higher total glucose than the 60% contribution of rock sugar in both raw material conditions and the form of processed red ginger products.
Implementasi Metode Forward Chaining pada Aplikasi Cyber Counseling Harahap, Febri Alfiani Putri; Damayanti, Fera; Lubis, Yessi Fitri Annisah; Khairunnisa, Khairunnisa; Syahputri, Nenna Irsa; Sundari, Siti
JiTEKH Vol. 12 No. 1 (2024): March 2024
Publisher : Universitas Harapan Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35447/jitekh.v12i1.848

Abstract

SMP Negeri 36 Medan has students with various backgrounds. Guidance and counseling is a support service provided by schools to students who have problems that can be resolved. The results of observations and interviews that have been conducted on counseling guidance teachers of SMP Negeri 36 Medan stated that they still find it difficult to deal with the problems faced by students. The method used in this study is the forward chaining method. The implementation of the forward chaining method in cyber counseling applications in overcoming problems that occur in students, aims to assist counseling guidance teachers and students in dealing with problems. The results of this study show that by using the forward chaining method in the cyber counseling application, the system can look for problems faced by counseling guidance teachers with students and the system can work according to the rules that have been set previously. Four counseling teachers conducted the system testing, which showed that 90% of the counseling teachers felt very helpful in knowing the problems of students through the cyber counseling application. In addition, testing also involved thirty students of SMP Negeri 36 Medan, where 95% of them were greatly helped by the cyber counseling application
Implementasi Node Bridge Untuk Meningkatkan Komunikasi Multi-Node Modul NRF24L01 Pada NLOS Purwanto, Abdi; Ratiandi Yacoub, Redi; Tjahjamooniarsih, Neilcy
JiTEKH Vol. 12 No. 1 (2024): March 2024
Publisher : Universitas Harapan Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35447/jitekh.v12i1.896

Abstract

Multi-node communication is an important aspect in wireless system development, especially in the context of non-line of sight communications. In this study, we explore the implementation of multi-node communication with bridge nodes to increase distance and reduce packet loss in the NRF24L01 transceiver module. The aim of writing this manuscript is to evaluate the effectiveness of using bridge nodes in improving the quality of multi-node communications on the NRF24L01 module in non-line of sight conditions. This study was carried out through a series of multi-node communication tests with certain configurations, including maximum power usage, 250kbps bit rate, and 5dBi antenna. Tests were carried out at different distances with and without the use of bridge nodes to compare communication performance. Our findings show that a configuration with three client nodes and an NRF24L01 module equipped with a 5dBi antenna is capable of achieving the longest distance of up to 125 m. In non-line of sight conditions, the packet loss rate at a distance of 25-75 m has very good communication quality, with packet loss values ranging from 0-6%. However, at a distance of 100 m, the packet loss percentage exceeds the threshold (15%). The use of bridge nodes succeeded in significantly reducing the packet loss rate, reducing the percentage of packet loss at client nodes C1, C2, and C3 to 6.00%, 6.67%, and 6.33% respectively. Thus, implementing the bridge node has proven effective in improving the quality of communication on the NRF24L01 module in non-line of sight conditions.
Implementasi Sistem Tranduser pada Peringatan Dini Banjir Berbasis Telegram Astuti, Widia Tri; Yacoub, Redi Ratiandi; Marpaung, Jannus
JiTEKH Vol. 12 No. 1 (2024): March 2024
Publisher : Universitas Harapan Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35447/jitekh.v12i1.909

Abstract

Floods as natural disasters are occurrences that can happen at any time and often result in loss of life and significant material damage. This research focuses on developing a transducer system for river water level monitoring based on Long Range Wireless Communication Technology and Internet of Things (IoT). The aim is to provide early warnings regarding river water levels, enabling the community to be more vigilant and minimize potential damage in the event of rising water levels. The research methodology involves utilizing a multiturn potentiometer in conjunction with Nodemcu ESP8266 and LoRa SX1278 devices. The results of the transducer system testing in a relevant environment showed an average difference of 0.27 cm, while testing in actual river water or real-world conditions yielded an average difference of 0.61 cm. The LoRa SX1278 testing at distances of 20 meters and 40 meters demonstrated a Packet Delivery Ratio (PDR) of 100% and a packet loss of 0%, indicating successful data reception. However, at a distance of 60 meters, the PDR was 90%, with a 10% packet loss, and at 70 meters, the PDR dropped to 10%, with a packet loss of 90%. This system includes Telegram notifications to allow users to access information on water levels as an early warning
Rancang Bangun Sistem Kendali dan Pemantauan Ketinggian Air Pada Panci Penguapan Terbuka Berbasis Website Dolf, Fredericus Dandani; Wigyarianto, F. Trias Pontia; Priyatman, Hendro
JiTEKH Vol. 12 No. 1 (2024): March 2024
Publisher : Universitas Harapan Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35447/jitekh.v12i1.910

Abstract

During the dry season, the water evaporation process experiences a significant increase resulting in a rapid decrease in water volume. Conversely, during the rainy season, the open evaporation pan can quickly fill up with rainwater, often causing overflow that disrupts the evaporation measurement process, thus requiring manual intervention to drain or refill the evaporation pan. One proposed solution to address this issue is by implementing an automatic water control system, water temperature monitoring, and water level measurement. The system design consists of two main aspects, namely hardware and software design. Hardware design involves creating a system block diagram and electronic circuit schematic diagrams. Meanwhile, software design includes program and WEB interface design. This research method involves the use of JSN-SR04T ultrasonic sensor, DS18B20 temperature sensor along with ESP32 DevKitC V4 device. Based on the test results, the ultrasonic sensor showed the highest error value of 19.38% with an average error percentage of 4.62% from 55 test runs. Meanwhile, the highest error value on the temperature sensor reached 3.46%, with an average error percentage of 1.46%. Sensor readings, pump status, and solenoid valve status are displayed in real-time on an LCD and Thinger.io dashboard.
Menganalisis dan Merancang Ulang User Interface Sistem Informasi Perpustakaan dengan Metode User-Centered Design Turnip, Togu Novriansyah; Lumban Gaol, Tiurma; Tesalonika, Risdo Marisi; Tampubolon, Beny Luis; Yuliana, Inez Cecilia Tiurma
JiTEKH Vol. 12 No. 1 (2024): March 2024
Publisher : Universitas Harapan Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35447/jitekh.v12i1.913

Abstract

The Library Information System has an unattractive interface. This is evidenced by the distribution of satisfaction questionnaires to a number of people from the IT Del community, including students, lecturers, and staff who think that the PI Del Library Information System user interface (SIPP) is less attractive so that users experience difficulties in carrying out activities in the system such as finding books that are wanted. SIPP User Interface redesign aims to improve the appearance of the user interface on the system. The purpose of this study was to redesign the user interface of the library information system, in accordance with User Centered Design (UCD) and improve the usability component of the standard user interface. s In this study the User-Centered Design (UCD) methodology was used in the process of redesigning the user interface. SIPP. In the UCD methodology, 3 iterations were carried out. Each iteration is carried out with 4 research stages. In the process of planning the human centered process, the user context is determined, in the specify the context of use stage, user needs are determined using personas, in the specify user and organizational requirements stage, an evaluation is carried out for users regarding the current system, in the produce design solution stage, it is carried out temporary design from the results of user-centered system evaluation, and the evaluate designs against user requirements stage is re-evaluated by users against the results of the temporary design in the form of wireframes and submitted a questionnaire as a form of assessment to compare each iteration. The new design is in the form of improving the page appearance of the PI Del Library Information System with a User Centered Design process. The UCD process is carried out with 3 iterations

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