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Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Published by Universitas Al Washliyah
ISSN : 23385391     EISSN : 26559862     DOI : https://doi.org/10.47662/alulum.v10i1
Core Subject : Economy, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan (P-ISSN: 2338-5391, E-ISSN: 2655-9862) is peer-reviewed journal publishes twice in the year (January and July) by Universitas Al Washliyah, Medan. The focus of journal is to publish current original research on Science and Technologi. publish original research papers, review articles, research aplications and case studies focused on Mathematic, Biology, Physic, Chemistry, Informatic, Electronic and Machine, Civil engineering, agriculture as well as related topics.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 119 Documents
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ANALISIS KINERJA SIMPANG BERSINYAL WARUNG JAMBU MENGGUNAKAN PTV VISSIM Ichwan, Choirul; Pahrial, M.
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 14 No. 1 (2026): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v14i1.1126

Abstract

The significant growth in the number of vehicles in Bogor City causes high traffic loads at the Warung Jambu intersection, thus affecting the performance of the intersection and causing quite high delays. This research aims to analyze the performance of the Warung Jambu signalized intersection using PTV Vissim microscopic simulation software. The data used includes traffic volume, geometric conditions of intersections, signal cycles, and vehicle speeds obtained through field surveys on weekdays and weekends. The research results show that the level of service (LOS) of the intersection is in categories E to F, indicating congested to very bad conditions. The average delay on weekday mornings reached 59.11 seconds (LOS E), while on weekends it increased significantly with a value of 70.95 seconds (LOS F) on Sunday afternoons. Modeling also shows that the maximum queue length can reach more than 500 meters at some intersection arms. This condition indicates the need for a comprehensive evaluation of signal arrangements and traffic management at the Warung Jambu intersection area.
TERMOGRAVIMETRI ANALISIS ULTIMAT DAN PROKSIMAT BIOMASSA SERTA PENENTUAN NILAI KALOR Sufra, Rifqi; Susanto, Herri; Rizkiana, Jenny; Suharto, Suharto; Satria, Arysca Wisnu
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 14 No. 1 (2026): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v14i1.1170

Abstract

Biomass characterisation is important for knowing the contained components in biomass. Some types of biomass studied were wood of acacia (Acacia mangium), gamal (Gliricidia sepium), coconut shell (Cocos nucifera) charcoal, and wood charcoal, for the gasification process through proximate analysis, ultimate analysis, and determination of high heating value (HHV). Ultimate analysis data utilised thermogravimetric analysis (TGA) for efficiency. The characterisation results show that coconut shell charcoal and wood charcoal have the highest fixed carbon content (72.66% and 68.98%) and higher C element (57.87% and 54.94%) as well as lower ash content compared to acacia wood and gamal wood, resulting in the highest calorific value (30.01 and 22.05 mJ/kg) and potentially better gasification performance. Conversely, acacia wood and gamal wood show relatively higher volatile matter content (64.03% and 76.38%) and ash (18.88%), resulting in lower calorific values. Overall, the research results indicate that coconut shell charcoal and wood charcoal are more recommended as the primary fuel in the gasification system.
SISTEM PENGAMBILAN KEPUTUSAN OTOMATIS BERBASIS FUZZY UNTUK KELAYAKAN REUSE AIR DRAIN MESIN RETORT Hadist, Mohamad Muchtarul; Sulistiyowati, Indah; Syahrorini, Syamsudduha; Falah, Agus Hayatal
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 14 No. 1 (2026): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v14i1.1171

Abstract

High water consumption in retort sterilization processes and the disposal of drain water with reuse potential highlight the need for an objective and automated water reuse feasibility assessment system. This study aims to develop an automated decision-making system based on Mamdani fuzzy logic to evaluate the reuse feasibility of retort drain water using turbidity, pH, and Total Dissolved Solids (TDS) parameters. The scope of this research includes the design of a multi-parameter monitoring prototype, the implementation of a food-grade-based fuzzy inference system, and the integration of decision results with automated valve control. The study adopts a research and development approach, in which sensor data are processed in real-time using a Mamdani fuzzy inference system consisting of 27 rule bases with a turbidity-based rule override mechanism. Experimental results indicate that all sensors achieve accuracy below 1%, repeatability under 0.3%, and good linearity within their operational ranges. Fuzzy logic evaluation demonstrates a decision accuracy of 100% compared to manual calculations. Testing on 30 retort drain water samples shows that 26.67% are classified as reuse, 66.67% as treatment, and 6.67% as reject, resulting in a water-saving potential of 93.33%. The proposed system effectively improves water-use efficiency, reduces operational costs, and supports sustainable practices in the food processing industry.
STRATEGI PENGEMBANGAN INDUSTRI RUMAH TANGGA GULA MERAH DI DESA BETTENG, KECAMATAN PAMBOANG, KABUPATEN MAJENE Sudirman, Sudirman; Astina, Astina; Nurlaela, Nurlaela; Safarni, Rizka Aulia
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 14 No. 1 (2026): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v14i1.1176

Abstract

Betteng Village is recognized as one of the centers of traditional household-scale palm sugar production. However, the development of this industry has not yet been optimal, as it faces various complex challenges, resulting in relatively slow progress. This study aims to determine alternative strategies for the development of household palm sugar industries in Betteng Village, Pamboang District, Majene Regency. The research method employed surveys, interviews, questionnaires, and literature studies. Data were analyzed using SWOT (Strengths, Weaknesses, Opportunities, Threats) and FAHP (Fuzzy Analytical Hierarchy Process). The analysis results indicate that the value obtained from the IFE matrix is 2.543, while the value of the EFE matrix is 2.599. The household palm sugar industry in Betteng Village is positioned in cell V, which reflects an average condition both internally and externally; therefore, the appropriate strategy is hold and maintain. Based on the SWOT analysis, 13 alternative strategies were formulated. The five main priority strategies for development are: enhancing palm sugar production capacity, creating secondary packaging accompanied by attractive and informative packaging design, providing entrepreneurship training for artisans, developing product diversification of palm sugar, and expanding marketing distribution channels through both offline and online platforms.
OPTIMASI PROSES BUBUT CNC PADA ALUMINIUM 7075 UNTUK HASIL PERMUKAAN MENGGUNAKAN METODE TAGUCHI-GREY RELATIONAL ANALYSIS A, Arfis; Mulia, Mulia; Sinurat, Fadlah; Abdilah, Tomi
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 14 No. 1 (2026): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v14i1.1182

Abstract

This research focuses on optimizing CNC turning parameters to achieve the best surface quality on Aluminum 7075 material. Surface quality, measured by surface roughness (Ra), is the primary target, while material removal rate (MRR) is considered as a supporting factor to maintain productivity. The Taguchi L9 method was used to design experiments by varying three key parameters: cutting speed (Vc), feed rate (f), and depth of cut (ap). Each parameter combination was tested, and the responses in the form of Ra and MRR values were recorded. To address the conflict between surface quality and productivity, multi-response analysis was conducted using the Grey Relational Analysis (GRA) technique. This method combines both responses into a single performance indicator, the grey relational grade (GRG), enabling comprehensive determination of optimal parameters. The analysis results show that the optimal combination is achieved at high cutting speed, low feed rate, and medium depth of cut. This setting significantly reduced surface roughness by 31.2% compared to the initial parameters while maintaining MRR at an acceptable level. Analysis of variance (ANOVA) confirmed that cutting speed is the most dominant factor (67.3% contribution) affecting the surface quality of the turning results. This research provides an effective and systematic parameter recommendation for improving final product quality in precision manufacturing processes.
IDENTIFIKASI KARAKTERISTIK SENSORI DAN FISIKOKIMIA KEFIR AIR KELAPA TUA (Cocos nucifera L.) Sagala, Anggun Sri Mulyani; Pratiwi, Caca; Emilia, Esi; Rosmiati, Risti; Firmansyah, Hardi
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 14 No. 1 (2026): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v14i1.1193

Abstract

Kefir is a probiotic drink that can be produced from dairy and non-dairy ingredients. Old coconut water (Cocos nucifera L.), which is often discarded as waste, can be used as a raw material for kefir production because it still has potential nutritional value for fermentation media. This study aims to identify the sensory and physicochemical characteristics of kefir made from old coconut water. This study used a completely randomized design (CRD) with starter concentration treatments consisting of two levels, namely 5% and 10% starter concentration, each conducted with two replicates. The parameters observed were sensory parameters, including color, aroma, taste, viscosity, and soda sensation, while physicochemical parameters included pH, viscosity, total dissolved solids, alcohol, protein, fat, ash, total sugar, and carbohydrates. Sensory evaluation showed that kefir made from old coconut water with a starter concentration of 5% had a higher acceptance level among panelists. Furthermore, the physicochemical characteristics of aged coconut water kefir at starter concentrations of 5% and 10% showed a pH ranging from 4.13 to 4.47, viscosity of 38.6 to 39.0 mP.s, total dissolved solids of 9.3 to 9.8°Brix, alcohol content of 4.16 to 4.95%, protein content of 0.35-0.38%, fat content of 0.58-2.17%, ash content of 0.19-0.27%, total sugar content of 4.15%-5.27%, and carbohydrate content of 3.74-4.74%. This study provides an overview of the sensory and physicochemical characteristics of kefir made from aged coconut water as a non-dairy fermentation medium.
IDENTIFIKASI KARAKTERISTIK FISIKOKIMIA YOGHURT NABATI DENGAN PENAMBAHAN PUREE BUAH NIPAH (Nypa fruticans) Abdullah, Zuhair; Pratiwi, Caca; Emilia, Esi; Rosmiati, Risti; Rukmana, Erni
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 14 No. 1 (2026): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v14i1.1197

Abstract

Plant-based yogurt made from coconut milk has potential as an alternative to dairy yogurt for individuals with lactose intolerance while promoting the utilization of local food resources. This study aimed to evaluate the physicochemical, microbiological, and antioxidant characteristics of coconut milk yogurt supplemented with nipa palm fruit (Nypa fruticans) puree. An experimental study was conducted using a Completely Randomized Design with three puree concentrations (20%, 25%, and 30%). Parameters analyzed included fat content, non-fat solids, protein, ash content, pH, titratable acidity, viscosity, Total Plate Count (TPC), and antioxidant activity using the DPPH method. Data were analyzed using one-way ANOVA followed by Duncan’s New Multiple Range Test at a 5% significance level. The addition of nipa palm fruit puree did not significantly affect fat, non-fat solids, protein, ash, pH, or acidity, but significantly influenced viscosity, TPC, and antioxidant activity. Increasing puree concentration tended to enhance viscosity and antioxidant activity; however, TPC values did not meet the national yogurt standard. Coconut milk yogurt enriched with nipa palm fruit puree shows potential as a functional food product based on local ingredients.
RESPON PERTUMBUHAN BIBIT SETEK VANILI (Vanila planifolia) TERHADAP APLIKASI BEBERAPA JENIS ZAT PENGATUR TUMBUH ALAMI Lada, Yulius Gae; Moghom, Diana; Nusantari, Apik; Rimindubby, Victor H.
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 14 No. 1 (2026): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v14i1.1208

Abstract

Vanilla is a high-value plantation commodity prized for its vanillin content, an essential raw material in the food, beverage, perfume, and cosmetic industries. This study aimed to examine the growth response of vanilla stem cuttings to various natural Plant Growth Regulators (PGR) and identify which organic source yields the most effective results. The research was conducted at the Greenhouse of the Faculty of Agriculture, Forestry, and Marine Sciences, Ottow Geissler University, Papua. The study employed a Completely Randomized Design (CRD) consisting of five treatments with seven replications each. The treatments included: A1 (Control), A2 (Coconut water 500 ml/l), A3 (Bamboo shoot extract 4 ml/l), A4 (Rice washing water 130 ml/l), and A5 (Red onion extract 10 ml/l). Vanilla cuttings were immersed in the respective solutions for 10 hours prior to planting in polybags. Parameters measured included survival percentage, shoot length, leaf count, and root length. Data were analyzed using ANOVA, followed by the Least Significant Difference (LSD) test where applicable. The results indicated that the application of different natural growth regulators did not produce significantly different responses, as all treatments yielded equally positive outcomes. However, A2 (Coconut water) emerged as the most effective treatment across all parameters, achieving a 100% survival rate, a shoot length of 11.40 cm, an average of 5.71 leaves, and a root length of 30.47 cm.
MIKROORGANISME TANAH DI KEBUN KELAPA SAWIT (Elaeis guineensis Jacq.) INSTITUT TEKNOLOGI SAWIT INDONESIA Dalimunthe, Fachrurrozi; Dibisono, Muhammad Yusuf; Ginting, Makhrani Sari; Nurliana, Nurliana; Hasibuan, Henry Budi; Parinduri, Sulthon
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 14 No. 1 (2026): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v14i1.1218

Abstract

The main role of bacteria and fungi in soil is to decompose dead organic matter, which then forms soil. However, not all fungi are beneficial. Under certain conditions, bacteria and fungi can also be harmful by causing disease. The aim of this study is to explore soil bacteria and fungi and determine the diversity of bacteria and fungi found in oil palm plantations on the ITSI Medan campus. Soil samples were taken using a proportional random sampling method on an area of ????6.7 Ha. There are 2 soil sample points in every 7 trees taken inside and outside the disc. Microorganisms were identified in the Soil Biology Laboratory, Agrotechnology Study Program, Faculty of Agriculture, University of North Sumatra. There are several types of microorganisms obtained, namely from the genus Bacillus, Aeromonas, Micrococcus, Mycobacterium, and Enterobacter with a total of 7.183 x 106.

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