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Menampilkan 81–90 dari 4697 artikel
Isolation and screening of halotolerant protease-producing bacteria from Lampung fermented shrimp paste
Protease are class of degradative enzymes that hydrolyze proteins, breaking its peptide bond, into smaller peptides and amino acids. Microbial proteases have gained increasing attention due to its productivity and utilization in various industries. Proteolytic bacteria derived from fermented shrimp paste from Lampung have great potential to meet this need. However, studies on these bacteria are still limited, so further research is needed to explore and optimally utilize their potential. This st...
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Integrating field inventory and in silico phylogenetic analysis of pteridophytes at Gandul Mount, Indonesia
Pteridophytes are vascular plants that are considered the most primitive plants because they only use spores to reproduce. Several major fern families exhibit distinctive morphological and ecological characteristics that support their taxonomic recognition. Pteridophytes represent an important component of tropical biodiversity, yet their diversity and evolutionary relationships in karst ecosystems remain poorly documented. This study aimed to integrate field inventory and in silico phylogenetic...
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PENGARUH PERSEPSI NILAI LAYANAN DAN KEPUASAN TERHADAP LOYALITAS PELANGGAN DI BANK PERKREDITAN RAKYAT
Probisnis
Vol 19
, No 1
(2026)
Penelitian ini bertujuan untuk menguji pengaruh persepsi nilai layanan dan kepuasan pelanggan terhadap loyalitas nasabah BPR. Penelitian ini mengambil obyek penelitian pada Bank Perkreditan Rakyat yang berada di wilayah Banyumas Raya. Teknik pengambilan sampel menggunakan purposive sampling melalui kuesioner yang bersifat tertutup. Ukuran sampel penelitian adalah 200 responden. Teknik analisis yang dipergunakan adalah SEM-AMOS. Temuan hasil penelitian menunjukkan pengaruh positif persepsi nila...
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Optimization of Coconut Fiber and Styrofoam Composition in Concrete to Improve Strength and Sound Absorption
Purwanto
; Firmawan, Ferry
; Ahmad, Fahrudin
; Purwanti, Hani
; Husna, Aimmatul
; Darus, Nadirah
; Haron, Zaiton
; Yahya, Khairulzan
This study aimed to evaluate the effect of coconut husk and Expanded Polystyrene (EPS) composition on the mechanical and acoustic properties of lightweight concrete. The research was conducted experimentally using a two-way factorial design with coconut husk variations of 0%, 0.5%, 1%, 1.5%, and 2% of cement weight and EPS variations of 0%, 10%, 20%, and 30% of coarse aggregate volume. A total of 20 mix variations (5 coir levels × 4 EPS levels) were prepared with three replications for each test...
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Analysis for Non-covalent Bonds in Protein Structures Using the DV-Xα Method
Halogen atoms are increasingly recognized for their ability to form non-covalent halogen bonds in protein–ligand complexesy. To systematically evaluate these interactions, we employed the DV-Xα method to calculate bond overlap populations (BOPs) in protein structures containing halogenated ligands. Using the Protein Data Bank, we identified thousands of entries with fluorine, chlorine, bromine, or iodine atoms. Structural coordinates were extracted around the chlorine atoms of the ligand and sub...
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System Dynamics-Based Industrial Modeling of Aluminium Processing in Indonesia
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 8
, No 2
(2026)
The Indonesian aluminum industry has great potential due to its abundant bauxite reserves, but downstream development to increase added value is still limited. This study uses a dynamic system model to simulate the development of Indonesia's aluminum industry, taking into account variables such as bauxite reserves, production capacity, demand, energy costs, raw material prices, and downstream development barriers. A scenario-based simulation method is applied to evaluate the impact of various po...
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Determinan Agresivitas Pajak Sub-sektor Konstruksi Bangunan, Properti, dan Real Estate yang Terdaftar di Bursa Efek Indonesia Tahun 2021-2024
This study aims to analyze the determinants of tax aggressiveness in construction, property, and real estate companies listed on the Indonesia Stock Exchange (IDX) during 2021–2024. The sample consists of 80 companies with 220 observations, selected using purposive sampling based on criteria such as the availability of financial statements and the absence of losses during the research period. The variables include tax aggressiveness (ETR), profitability (ROA), leverage (DAR), board size, and fir...
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Architecture and Field Evaluation of an IoT-Integrated Village Information System for Public Service
Hartono, Susilo
; Universitas Muhammadiyah Pringsewu
; Sutikno, Tole
; Ahmad Dahlan University
; Yudhana, Anton
; Ahmad Dahlan University
Telematika
Vol 19
, No 1
(2026)
Village public services often struggle with slow administrative workflows, limited transparency, and unequal access to service information, particularly where processes remain manual and difficult to monitor in real time. This study evaluates a deployed integrated village information system augmented with Internet of Things (IoT) signals—RFID-based operational monitoring and water/electricity facility-status sensing—to assess whether service quality improved after implementation and to clarify t...
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Development of a Lightweight CNN Architecture for Multiclass Brain Tumor Detection Based on RGB Images
Telematika
Vol 19
, No 1
(2026)
Convolutional Neural Networks (CNNs) have become the backbone of various computer vision applications, including medical diagnosis and disease detection. In the context of brain tumor detection, CNNs have demonstrated their capacity to interpret the subtle complexities present in brain images, distinguish between various tumor categories, and provide essential information that can inform clinical decision-making and personalized treatment planning.This study aims to develop a lightweight Convolu...
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Portfolio Risk Assessment Using VaR and CVaR: A Comparative Study of Variance–Covariance Method and Monte Carlo Simulation
Telematika
Vol 19
, No 1
(2026)
This study examines portfolio risk in Indonesia’s energy sector by applying Value at Risk (VaR) and Conditional Value at Risk (CVaR) under the Variance–Covariance and Monte Carlo Simulation approaches. The analysis focuses on ten stocks from the oil and gas as well as coal subsectors listed on the Indonesia Stock Exchange (IDX), using monthly closing price data from January 2020 to December 2024. A Weighted Scoring Method (WSM) is first employed to select stocks with superior fundamentals and li...
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