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All Journal Jurnal Armada Informatika Pascal: Journal of Computer Science and Informatics
Melissa Putri Hutabarat
Universitas Budi Darma
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Library & Information Science Social Sciences

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User Experience Evaluation of Shopee-Based Product Sales at PT. Herba Hero Harmoni Using UEQ Adira Arifandi; Melissa Putri Hutabarat; Lince Tomoria Sianturi; Chandra Frenki Sianturi
Jurnal Armada Informatika Vol 10 No 1 (2026): Juni
Publisher : STMIK Methodist Binjai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36520/jai.v10i1.276

Abstract

The development of digital technology encourages companies to use marketplaces as online sales and marketing channels. PT Herba Hero Harmoni uses the Shopee marketplace to support the sales of herbal products to customers. This study aims to evaluate the user experience of the online sales information system through the Shopee marketplace using the User Experience Questionnaire (UEQ) method. The study applied a quantitative descriptive approach involving 30 active Shopee users as respondents. Data were collected using the UEQ questionnaire, which consists of 26 items and six dimensions: attractiveness, perspicuity, efficiency, dependability, stimulation, and novelty. The data were analyzed using the UEQ method and tested for validity and reliability. The validity test showed that 17 items were valid and 9 items were invalid. The reliability test obtained a Cronbach's Alpha value of 0.838, indicating that the instrument was reliable. The UEQ analysis showed average scores of 6.32 for attractiveness, 6.11 for perspicuity, 6.24 for efficiency, 6.05 for dependability, 6.38 for stimulation, and 5.96 for novelty. Stimulation achieved the highest score, while novelty achieved the lowest score but remained in the good category. Overall, the Shopee application provides a good to very good user experience and supports comfort, ease of use, and user satisfaction in online sales and purchase transactions.
A Comparative Analysis of the Efficiency of Blockchain Consensus Algorithms: Proof of Work, Proof of Stake, Delegated Proof of Stake, and Practical Byzantine Fault Tolerance Desman Karya Jaya Zega; Laurensius So Putra Jaya Halawa; Siaman Lase; Melissa Putri Hutabarat
Pascal: Journal of Computer Science and Informatics Vol. 3 No. 02 (2026): Pascal: Journal of Computer Science and Informatics
Publisher : Devitara Innovations

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Abstract

The rapid development of blockchain technology has accelerated the adoption of distributed systems across various sectors, including financial services, supply chain management, the Internet of Things (IoT), and digital government. Consensus algorithms play a fundamental role in blockchain by ensuring transaction validity and data consistency without relying on a centralized authority. Since each consensus mechanism exhibits different characteristics, a comparative analysis is required to identify its strengths and limitations. This study aims to analyze and compare the efficiency of four major blockchain consensus algorithms, namely Proof of Work (PoW), Proof of Stake (PoS), Delegated Proof of Stake (DPoS), and Practical Byzantine Fault Tolerance (PBFT). The research employed a comparative literature study by collecting, selecting, and analyzing relevant scientific publications. The comparison was conducted based on transaction throughput, energy efficiency, communication complexity, transaction finality, network characteristics, and fault tolerance. The results indicate that no single consensus algorithm provides optimal performance across all evaluation parameters. PoW offers high security and decentralization but suffers from high energy consumption and low throughput. PoS provides a balanced trade-off among energy efficiency, security, and scalability, while DPoS improves transaction capacity through a delegated validator mechanism. PBFT achieves high throughput and instant transaction finality but is more suitable for permissioned blockchain environments with a limited number of participating nodes. This study proposes a comparative analysis framework that can serve as a reference for selecting an appropriate consensus algorithm based on blockchain implementation requirements.
Co-Authors Adira Arifandi Chandra Frenki Sianturi Desman Karya Jaya Zega Laurensius So Putra Jaya Halawa Lince Tomoria Sianturi Siaman Lase