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All Journal Jurnal ULTIMATICS Technologia: Jurnal Ilmiah Journal of Applied Informatics Research
Luthfi Atikah
Politeknik Astra
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering

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Topic Modelling Using VSM-LDA For Document Summarization Luthfi Atikah; Novrindah Alvi Hasanah; Agus Zainal Arifin
ULTIMATICS Vol 14 No 2 (2022): Ultimatics : Jurnal Teknik Informatika
Publisher : Faculty of Engineering and Informatics, Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31937/ti.v14i2.2854

Abstract

Summarization is a process to simplify the contents of a document by eliminating elements that are considered unimportant but do not reduce the core meaning the document wants to convey. However, as is known, a document will contain more than one topic. So it is necessary to identify the topic so that the summarization process is more effective. Latent Dirichlet Allocation (LDA) is a commonly used method of identifying topics. However, when running a program on a different dataset, LDA experiences "order effects", that is, the resulting topic will be different if the train data sequence is changed. In the same document input, LDA will provide inconsistent topics resulting in low coherence values. Therefore, this paper proposes a topic modelling method using a combination of LDA and VSM (Vector Space Model) for automatic summarization. The proposed method can overcome order effects and identify document topics that are calculated based on the TF-IDF weight on VSM generated by LDA. The results of the proposed topic modeling method on the 1300 Twitter data resulted in the highest coherence value reaching 0.72. The summary results obtained Rouge 1 is 0.78, Rouge 2 is 0.67 dan Rouge L is 0.80.
Implementation of a Web-Based Goods Delivery Service System Using the Waterfall Method Novrindah Alvi Hasanah; Luthfi Atikah
Journal of Applied Informatics Research Vol. 1 No. 2 (2025): December
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jair.v1i2.50102

Abstract

The development of information technology is driving changes in people's transaction patterns, particularly in online buying and selling activities. However, not all consumer needs can be met through available e-commerce platforms, especially for certain products that are limited or not always available. Therefore, consignment services have become a popular alternative solution. This study aims to implement a web-based consignment service system that can facilitate the ordering process, product data management, and transactions between customers and service providers in a structured and efficient manner. The system development method used is the Waterfall method, which consists of the stages of needs analysis, system design, implementation, testing, and maintenance. The system built has two main types of users, namely admin and customer, with different interfaces and access rights. The implementation results show that the system is able to support the online consignment service process, from product search, ordering, transaction management, to report presentation, thereby increasing the ease, speed, and accuracy of the web-based consignment service.
PENERAPAN BUSINESS PROCESS REENGINEERING MENGGUNAKAN FRAMEWORK SHAREPOINT PADA PORTAL PROFIL PERUSAHAAN DI PT XYZ Dwi Diana Wazaumi; Luthfi Atikah; Zahra Salsabilla Ananda Putri; Zakky Rabindra Fairuzzanu Juliansyah
Technologia : Jurnal Ilmiah Vol 16 No 2 (2025): Technologia (April)
Publisher : Fakultas Teknologi Informasi, Universitas Islam Kalimantan Muhammad Arsyad Al Banjari, di bawah koordinasi UPT Publikasi dan Pengelolaan Jurnal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/tji.v16i2.18008

Abstract

PT XYZ merupakan perusahaan penyedia layanan digital yang menerapkan teknologi digital pada bisnis suatu organisasi dengan menyediakan solusi dan teknologi digital. Oleh karena itu, PT XYZ terus berinovasi dan beradaptasi dengan perkembangan teknologi terkini. Sebagai bagian dari strategi perusahaan dalam meningkatkan kepuasan pelanggan dan memperluas jangkauan layanan, PT XYZ memahami bahwa beberapa perusahaan klien masih menghadapi tantangan dalam memanfaatkan sistem informasi dalam manajemen sebagai sumber daya yang akan menimbulkan permasalahan karena kurangnya optimalisasi seperti manajemen informasi yang buruk, manajemen dokumen yang tidak terorganisir, komunikasi internal yang terganggu. Berdasarkan permasalahan yang timbul maka PT XYZ merencanakan pengembangan sistem informasi berbasis Portal Perusahaan di microsoft Sharepoint. Dengan merancang menggunakan pendekatan waterfall dan pendekatan menggunakan pendekatan Business Process Reengineering (BPR). Didapat hasil berdasarkan perhitungan efisiensi throughput dari 17,24% menjadi 100%.
Analysis of Public Concerns Towards COVID-19 Vaccines on X Post-Peak Pandemic Phase Luthfi Atikah
ULTIMATICS Vol 18 No 1 (2026): Ultimatics : Jurnal Teknik Informatika
Publisher : Faculty of Engineering and Informatics, Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31937/ti.v18i1.4704

Abstract

The rapid development of social media, particularly platform X, has created both opportunities and challenges in public health discourse. This study aims to analyze public concerns and perceptions toward COVID-19 vaccines in the post-peak pandemic phase. A dataset of 4.519 Indonesian-language tweets collected between September 2024, and September 2025 was processed through four stages of preprocessing and subsequently labeled. The labeled data were then evaluated using two experimental scenarios, namely with and without data augmentation, and analyzed using a seven-class sentiment classification framework.The results indicate that negative sentiment overwhelmingly dominates the discourse at 96.29%, with strongly negative sentiment accounting for 91.88%. Meanwhile, neutral sentiment is only 0.36%, and positive sentiment remains relatively low at 3.35%. These findings suggest that public distrust toward COVID-19 vaccines persists even in the post-peak phase of the pandemic. Therefore, more effective, targeted, and evidence-based health communication strategies are necessary to address public concerns and improve vaccine confidence.
Co-Authors Agus Zainal Arifin Dwi Diana Wazaumi Novrindah Alvi Hasanah Novrindah Alvi Hasanah Zahra Salsabilla Ananda Putri Zakky Rabindra Fairuzzanu Juliansyah