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All Journal MEANS (Media Informasi Analisa dan Sistem) Jurnal Kajian Dan Penalaran Ilmu Manajemen Journal of Mandalika Literature Jurnal Ilmiah Manajemen Dan Kewirausahaan Jurnal Informatika Dan Tekonologi Komputer Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer
Abdul Tahir
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Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Mechanical Engineering Social Sciences Other

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Analisis korelasi dan prediksi Pengaruh Kehadiran dan Disiplin terhadap Capaian Akademik Mahasiswa, Studi Kasus Mahasiswa ATS Musakirawaty; Abdul Tahir; Israkwaty
Journal of Mandalika Literature Vol. 5 No. 4 (2024)
Publisher : Institut Penelitian dan Pengembangan Mandalika (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jml.v5i4.3787

Abstract

This study aims to analyze the influence of attendance, permission, sickness, and discipline on students' Cumulative Grade Point Average (GPA). Consistent attendance in class allows students to follow the subject matter and participate in discussions, potentially increasing GPA. Conversely, permits and illness can interfere with the learning process and negatively impact GPA. Discipline, such as tardiness or inappropriate behavior, can also negatively affect academic performance. This study used Pearson correlation analysis to measure the relationship between independent variables (attendance, permission, illness, discipline) and GPA, as well as linear regression analysis to identify the influence of each factor. Data on attendance, permits, sickness, and discipline were collected from the academic information system for six semesters at one vocational college. The results of the analysis showed that attendance had a strong negative correlation with GPA, while sickness, permitting, and indiscipline also showed a negative relationship with GPA. The linear regression model shows that all these parameters have a negative coefficient to GPA, with permission having the greatest negative influence. This research suggests the importance of policies that encourage consistent attendance and reduce permits and attention to student health and discipline to improve academic achievement.
Performance Analysis of Neural Networks With Backpropagation on Binary and Multi-Class Data Classification Abdul Tahir; Irdam, Irdam; Sirama , Sirama
MEANS (Media Informasi Analisa dan Sistem) Volume 10 Nomor 1
Publisher : LPPM UNIKA Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Neural networks represent a widely adopted paradigm within the domain of machine learning, employed for a multitude of classification endeavors, encompassing image recognition and natural language processing. This investigation seeks to elucidate the influence of varying neuron quantities in hidden layers on the efficacy of neural networks in both binary and multi-class classification endeavors. The research utilizes a dataset procured from images depicting characters and digits, which were transformed into binary format via a thresholding methodology. The neural network architectures comprise one and two hidden layers, which are trained employing the backpropagation algorithm in conjunction with the Adam optimizer. The evaluation of the models is conducted through metrics such as accuracy, loss curves, and confusion matrices. Findings reveal that the configuration featuring two hidden layers with 40 sampai 99 neurons achieves the pinnacle accuracy of 99.64 percent alongside optimal loss stability. Furthermore, models incorporating a single hidden layer exhibited commendable accuracy, thereby indicating that a reduced number of neurons can proficiently encapsulate data complexity in less demanding tasks. This research underscores the criticality of selecting suitable neural network configurations contingent upon data complexity and classification objectives, while advocating for further investigation into regularization strategies to enhance performance.
Analisa Risiko Kecelakaan Kerja di Departemen Logistik pada PT. Huayue Nickel Cobalt dengan Menggunakan Metode Hirarki Pengendalian Resiko dan HIRADC Awwal Hajarul Tahir; Amri Yanuar; M. Ardhya Bisma; Abdul Tahir
Jurnal Ilmiah Manajemen dan Kewirausahaan Vol. 4 No. 2 (2025): Jurnal Ilmiah Manajemen dan Kewirausahaan
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jimak.v4i2.4160

Abstract

PT. Huayue Nickel Cobalt (called hync) is a joint venture between Zhejiang Huayou Cobalt Co., Ltd. And China Molybdenum Co., Ltd. As well as Tshingshan Stainless Steel in October 2018, the business range includes resource development, a nickel-cobalt metal extraction, and an integrated to completed product processing. The project adopts third-generation High Pressure Acid Leaching (HPAL) technology, one of the most sophisticated nickel processing technologies in the world. This technology enabled the maximum use of all the components of precious metals in the laterite nickel ore. This can thus extract nickel, cobalt, and manganese both simultaneously and integrated into the production of fresh energy batteries. HIRADC plays a crucial role in the K3 management system because it serves as a cornerstone of prevention and risk control efforts. Its application helps companies in determining effective safety and occupational strategies and strategies. PT Huayue Nickel Cobalt has its own problems with implementation, and there are several obstacles, such as a lack of employee awareness of safety procedures, a standard operational breach. This problem can affect company productivity and employee welfare, so further effort is needed to improve the works surveillance and safety training systems. The application of HIRADC assists in the creation of risk-control strategies for risk-control methods is proven to be effective in providing structured guidance for risk assessment, from danger identification, risk assessment, to appropriate control recommendations. This analysis can provide a basis for management decision making.
Analisis Sistem Penilaian Kinerja Holistik: Integrasi 360-Degree Feedback dan Critical Incident Technique dalam Konteks Politeknik Abdul Tahir; Duddy Arisandi
Jurnal Kajian dan Penalaran Ilmu Manajemen Vol. 4 No. 3 (2026): Juli
Publisher : CV. Aksara Global Akademia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59031/jkpim.v4i3.846

Abstract

Penilaian kinerja merupakan elemen krusial dalam manajemen sumber daya manusia (SDM) untuk memastikan efektivitas organisasi dan pengembangan karyawan. Namun, banyak sistem penilaian tradisional masih bergulat dengan masalah subjektivitas, kurangnya transparansi, dan minimnya fokus pada pengembangan. Penelitian ini bertujuan mengevaluasi sistem penilaian kinerja yang berlaku di Politeknik XXX dan mengusulkan kerangka model yang mengintegrasikan 360-Degree Feedback dan Critical Incident Technique (CIT) untuk mengatasi kelemahan tersebut. Menggunakan analisis survei deskriptif dan analisis kesenjangan (gap analysis) pada data Politeknik XXX , ditemukan bahwa sistem saat ini bersifat top-down, minim umpan balik multi-sumber (rekan sejawat dan mahasiswa 0%), lemah dalam pencatatan kejadian kritis (18.5% untuk prestasi, 29.6% untuk pelanggaran), serta memiliki skor komunikasi hasil penilaian (2.07/5.00), kepuasan, dan keadilan yang moderat (2.96/5.00). Kesenjangan signifikan teridentifikasi pada aspek transparansi (gap 2.29), orientasi perbaikan (gap 2.08), dan rekam kejadian kritis/CIT (gap 2.07). Implikasi dari temuan ini menunjukkan urgensi transformasi menuju sistem manajemen kinerja modern yang mengedepankan objektivitas, transparansi, dan pengembangan profesional berbasis data. Integrasi 360-Degree Feedback dan CIT diyakini mampu menyediakan perspektif holistik dan bukti perilaku faktual yang diperlukan untuk penilaian yang lebih adil dan formatif.
Optimasi Mesin Pencacah Plastik Tipe Shredder untuk Meningkatkan Kinerja Transmisi dan Keseragaman Hasil Cacahan Abdul Tahir; Sirama Sirama
Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer Vol. 6 No. 2 (2026): Juli: Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/juritek.v6i2.7486

Abstract

Pencacahan plastik merupakan tahap awal penting dalam rantai daur ulang karena menentukan kemudahan transportasi, pencucian, pemilahan, dan proses lanjutan. Penelitian ini menyajikan perancangan dan evaluasi kinerja mesin pencacah plastik tipe shredder melalui optimasi sistem transmisi dan konfigurasi blade. Metode penelitian meliputi observasi kelemahan mesin awal, studi literatur, seleksi komponen, manufaktur, perakitan, serta uji fungsi pada botol PET dan kaleng tipis. Rancangan menggunakan motor listrik 1 HP 1400 rpm, pulley-belt, gearbox reducer rasio 1:40, kopling flange, roda gigi penghubung poros, dan 24 rotary cutter berdimensi 115 x 115 x 12 mm dengan enam mata potong. Putaran keluaran teoritis poros blade adalah 35 rpm. Hasil analisis menunjukkan massa total blade sekitar 32,432 kg, gaya berat 318 N, dan reaksi tumpuan poros masing-masing 159 N. Pengujian menunjukkan kapasitas 600-800 g/menit dan kemampuan mencacah botol PET sampai 2 mm serta kaleng 0,5 mm, meskipun ukuran cacahan belum seragam. Dibandingkan studi terdahulu, kinerja prototipe berada pada rentang yang relevan untuk mesin skala kecil, tetapi konsistensi hasil cacahan masih dipengaruhi geometri, celah, ketajaman, dan keausan blade. Penelitian ini menegaskan bahwa optimasi transmisi harus diikuti pengendalian konfigurasi blade agar mesin pencacah plastik lebih andal untuk aplikasi pengelolaan limbah lokal.
Analisis Komputasional Pola Pelanggaran Mahasiswa Lingkungan Pendidikan Akademi Teknik Vokasi Abdul Tahir; Jasman Jasman
Jurnal Informatika Dan Tekonologi Komputer (JITEK) Vol. 5 No. 2 (2025): Juli : Jurnal Informatika dan Tekonologi Komputer
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jitek.v5i2.5898

Abstract

This study analyzed the pattern of student violations at the Vocational Engineering Academy with a total of 5,901 recorded cases. The purpose of the study was to identify the distribution, temporal trends, and factors influencing violations, as well as formulate policy recommendations. The method used is descriptive-quantitative analysis with secondary data, including frequency analysis, categorization, correlation, and visualization using Python (Pandas, NumPy, Matplotlib, Seaborn). The results showed the dominance of verbal violations (85.5%) compared to written violations (14.5%), with the most categories being Other (43.6%), Assignments/Reports (23.9%), and Delays (21.6%). Temporal analysis revealed a pattern of student adaptation: violations were high in the early semester (especially equipment breakdowns and Other categories), decreased in the middle semester, but delays increased in the final semester due to academic load. Other findings showed low violations of Rules of Conduct (6.6%) and Equipment Damage (4.3%), reflecting relatively controlled non-academic discipline. The implications of the study highlight the need for a multi-tiered coaching system, improved task management, digital presence, and revision of breach categorization for data accuracy. Recommendations include the development of an integrated task management platform, academic mentoring programs, time management workshops, and data-driven policy evaluations. This research provides an empirical basis for institutions to design effective violation prevention strategies, especially through preventive approaches and real-time monitoring systems.
Optimasi Pembangkit Hybrid Energi Terbarukan Pada Kampus Vokasi ATS Menggunakan Metode Wild Horse Optimization (WHO) Marliani Marliani; Muhammad Naim; Abdul Tahir
Jurnal Informatika Dan Tekonologi Komputer (JITEK) Vol. 5 No. 2 (2025): Juli : Jurnal Informatika dan Tekonologi Komputer
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jitek.v5i2.6322

Abstract

The use of renewable energy sources has become widespread throughout the world as a step to reduce dependence on fossil energy. Hybrid electric power systems that use renewable energy as their base have been adopted as a solution to produce energy efficiently. In this paper, the hybrid system discussed is hybrid PV, wind turbine and battery storage. This hybrid design system is very dependent on the load profile, potential energy sources, and geographical location of the research location. This research discusses the technical design and capital costs of a hybrid electric power system which will be implemented as a practicum alternative energy source on the ATS campus, Sorowako. Irradiance, temperature, average wind speed and component sizing are the main parameters discussed. Design technical and economic analysis (capital cost) using MATLAB software with the wild horse optimization (WHO) algorithm. The results of the WHO analysis will be compared with the analysis of a common optimization method, namely PSO. And the results obtained from the WHO and PSO analyzes are not much different, but the WHO analysis reaches its convergence value faster, namely in the 20th iteration, while the PSO analysis reaches its convergence value in the 40th iteration. The capital cost value obtained by the WHO analysis is $ 198,363.05 with a total of 772 PV units, a total of 1 unit of WT, and a total of 54 batteries.
Perancangan Aplikasi Pembelajaran Segitiga Berbasis Media Digital Dengan Visualisasi Dinamis Abdul Tahir; Musakirawati Musakirawati
Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer Vol. 5 No. 1 (2025): Maret
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/juritek.v5i1.3953

Abstract

Segitiga sebagai entitas geometris fundamental, memiliki peran kritis dalam perkembangan ilmu matematika dan terapan, mulai dari konstruksi piramida Mesir Kuno hingga aplikasi modern dalam teknik, fisika, dan grafika komputer. studi OECD PISA 2022 mengungkapkan 65% siswa di Indonesia mengalami kesulitan menerapkan konsep segitiga dalam masalah kontekstual, akibat keterbatasan alat bantu visualisasi dinamis dan representasi variasi segitiga. Penelitian ini bertujuan mengembangkan aplikasi kalkulator segitiga berbasis web interaktif yang mengintegrasikan kombinasi input dengan visualisasi dinamis berbasis HTML5 Canvas untuk meningkatkan pemahaman konseptual. Metode pengembangan melibatkan penerapan Hukum Sinus, Cosinus, Pythagoras, dan rumus Heron, disertai skala otomatis dan label interaktif guna memfasilitasi eksplorasi hubungan dinamis antar elemen segitiga. Aplikasi ini mengatasi kelemahan alat sebelumnya seperti GeoGebra dan Triangle Solver App yang terbatas dalam visualisasi real-time atau komprehensivitas perhitungan. Hasil pengujian menunjukkan bahwa integrasi antarmuka interaktif berbasis web mampu meningkatkan keterlibatan belajar.Studi ini merekomendasikan pengembangan lebih lanjut untuk mencakup segitiga spherical dan integrasi kecerdasan buatan dalam analisis kesalahan siswa.
Rancang Bangun Purwarupa Mobil Listrik 4 Penumpang 3000 Watt dengan Fokus pada Sistem Penggerak dan Suspensi Abdul Tahir; Jasman Jasman; Musakirawati Musakirawati
Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer Vol. 5 No. 3 (2025): November: Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/juritek.v5i3.6268

Abstract

Penelitian ini berfokus pada pengembangan purwarupa mobil listrik empat penumpang berdaya 3000 Watt untuk aplikasi mobilitas terbatas seperti di lingkungan kampus. Permasalahan utama adalah kurangnya studi komprehensif yang mengintegrasikan perancangan, fabrikasi, dan pengujian sistem penggerak serta suspensi EV menggunakan sumber daya dan material lokal yang terjangkau. Tujuan penelitian adalah merancang, memfabrikasi, dan menguji kinerja prototipe tersebut guna membuktikan kelayakan teknologi dan desainnya. Metode yang diterapkan adalah metodologi rekayasa sistematis, meliputi: analisis kebutuhan, perancangan konseptual dengan evaluasi alternatif berbobot, fabrikasi chassis dan suspensi dari baja hollow galvanis melalui proses pemotongan, pengelasan, dan perakitan, serta integrasi sistem penggerak (motor BLDC 3000W, controller 3 fasa, diferensial). Pengujian kinerja dilakukan secara komprehensif terhadap fungsi kontrol, kemampuan traksi, stabilitas, kenyamanan, dan keamanan struktural. Hasil utama menunjukkan bahwa prototipe berhasil difabrikasi dan beroperasi dengan baik. Sistem penggerak bekerja optimal, sementara struktur chassis dan suspensi terbukti mampu menopang beban hingga 300 kg dengan stabil dan aman, sesuai hasil perhitungan analitis dan uji fisik. Sintesis gagasan utama menegaskan bahwa pendekatan design-for-manufacturing dengan pemanfaatan material lokal merupakan strategi yang efektif. Disimpulkan bahwa mobil listrik berdaya 3000 Watt dapat direalisasikan secara fungsional dengan teknologi sederhana, memberikan kontribusi nyata bagi pengembangan EV aplikatif sekaligus mengisi gap antara desain konseptual dan validasi eksperimental dalam literatur teknik otomotif nasional.
Co-Authors Amri Yanuar Awwal Hajarul Tahir Duddy Arisandi Irdam, Irdam Israkwaty Jasman Jasman Marliani Marliani Muhammad Ardhya Bisma Muhammad Naim Musakirawati Musakirawati Musakirawaty Sirama , Sirama Sirama Sirama