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All Journal Indonesian Journal of Electronics and Instrumentation Systems Jupiter Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi)
Afandi Nur Aziz Thohari
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Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Library & Information Science

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Rancang Bangun Spectrum Analyzer Menggunakan Fast Fouier Transform Pada Single Board Computer Afandi Nur Aziz Thohari; Agfianto Eko Putra
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 7, No 1 (2017): April
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (690.294 KB) | DOI: 10.22146/ijeis.16417

Abstract

Spectrum analyzer is an instrument device to measure the magnitude of the frequency and the power of signal. It has many benefits, such as used for testing telecommunication devices, determining the allocation of unused frequencies and also for practicum in schools or universities. However, because of these many benefits, the price of this signal measuring equipment soared in the market.As an alternative, a device that can serve as spectrum analyzer yet has an affordable price is invented in the form of the prototype of spectrum analyzer built using a single board computer by applying a fast Fourier transform algorithm. Feedback from the prototype is in the form of radio signal captured using RTL-SDR.The test results showed that the range of frequencies that can be displayed by the prototype is 24 MHz to 1.769 MHz. Then the test results of fast Fourier transform computing on N points showed that the prototype can work smoothly using the N from 512 to 32.768 points. The use of N more than 32.768 points will cause CPU and disk memory overloaded and lead to a slow performance. Finally, comparison of the levels of spectrum was performed using spectrum analyzer Anritsu MS2720T. As a result, it is known that prototype can be used to show the location of the frequency spectrum of the radio signal appropriately.
Rancang Bangun Website Company Profil Pusat Pelatihan Pertanian Pedesaan Swadaya Bheger Pemalang Fahriah, Sirli; wahyu sulistiyo; Aisyatul Karima; Afandi Nur Aziz Thohari; Eri Eli Lavindi
JUPITER (Jurnal Penelitian Ilmu dan Teknologi Komputer) Vol 16 No 1 (2024): Jurnal Penelitian Ilmu dan Teknologi Komputer (JUPITER)
Publisher : Teknik Komputer Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.10811296

Abstract

Information is an important factor in the era of globalization. Service providers in the agricultural sector are not immune from the need for information. In the right way, information can be delivered on target. One way to introduce an agency or community is by processing information and building an information system. The information system can make it easier for the bureaucracy to introduce the Bheger Self-Help Rural Agricultural Training Center or commonly known as "P4S Bheger" to the community. One of the information systems that will be created to help P4S Bheger is a company profile website. Because to introduce an agency in this era, a company profile website is needed. The Bheger Self-Help Rural Agricultural Training Center or commonly known as "P4S Bheger" still uses manual methods in its management or introduction to the community. What has been done is using social media. This was felt to be inefficient, because a special place was needed to accommodate all information related to the Bheger Self-Help Rural Agricultural Training Center. The aim of this research is to build a company profile website. The results of the design of the company profile website which consists of home, about, contact and product menus help introduce P4S Bheger to the
Optimizing Automated Essay Scoring with Lightweight Large Language Models and Validated Rubrics Prayitno; Fahima Choirun Nabila; Mohammad Khambali; Afandi Nur Aziz Thohari; Karisma Trinanda Putra; Viqi Ardaniah; Jurianto
Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Vol 10 No 2 (2026): April 2026
Publisher : Ikatan Ahli Informatika Indonesia (IAII)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29207/resti.v10i2.7012

Abstract

Manual grading of English as a Foreign Language (EFL) essays often leads to inconsistent scores among educators, despite the use of rubrics. While traditional Automated Essay Scoring (AES) systems offer speed, they often fail due to high computational cost, reliance on extensive datasets, and an inability to capture holistic writing qualities such as creativity and humanistic expression. This study addresses these issues by introducing AESCORE, a novel, lightweight, and cost-effective AES framework. Our methodology centers on integrating validated rubric criteria (identified via VOSviewer analysis) with open-source Large Language Models (LLMs), specifically emphasizing a human-centered approach. We evaluated AESCORE across 100 EFL essays using several prompting techniques, including few-shot and multi-trait specialization. The system achieved its most robust performance and high scoring consistency (Quadratic Weighted Kappa QWK = 0.6660) using the DeepSeek-R1 8B LLM with few-shot prompting. AESCORE represents a significant contribution by demonstrating that sophisticated, pedagogically-aligned writing assessment and generative feedback can be achieved with accessible AI, offering a reliable alternative for improving productive writing skills in higher education.
Co-Authors Agfianto Eko Putra Aisyatul Karima Eri Eli Lavindi Fahima Choirun Nabila Fahriah, Sirli Jurianto Karisma Trinanda Putra Mohammad Khambali Prayitno Viqi Ardaniah Wahyu Sulistiyo