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All Journal IPTEK The Journal for Technology and Science AKSIOMA: Jurnal Program Studi Pendidikan Matematika AlphaMath: Journal of Mathematics Education Proceeding SENDI_U Union: Jurnal Ilmiah Pendidikan Matematika Jurnal Matematika: MANTIK JTAM (Jurnal Teori dan Aplikasi Matematika) JCES (Journal of Character Education Society) DoubleClick : Journal of Computer and Information Technology Buana Matematika : Jurnal Ilmiah Matematika dan Pendidikan Matematika Jurnal Informatika Global Jurnal Studi Guru dan Pembelajaran Jurnal Manajemen Informatika dan Sistem Informasi Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP) Jurnal Abdi Insani Infotek : Jurnal Informatika dan Teknologi Jurnal Sains dan Edukasi Sains Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Nusantara Science and Technology Proceedings Infotech: Jurnal Informatika & Teknologi INTELEKTIVA Jurnal Pengabdian kepada Masyarakat Jurnal Pengabdian Kepada Masyarakat Decode: Jurnal Pendidikan Teknologi Informasi KOMMAS: Jurnal Pengabdian Kepada Masyarakat Duta.com : Jurnal Ilmiah Teknologi Informasi dan Komunikasi Khatulistiwa: Jurnal Pendidikan dan Sosial Humaniora Jurnal Indonesia Sosial Teknologi Proceeding of International Conference Health, Science And Technology (ICOHETECH) Politeknosain Nusantara Journal of Computers and its Applications SmartComp Jurnal Pendidikan dan Sosial Humaniora
Nugroho Arif Sudibyo
Department Of Informatics Engineering, Faculty Of Computer Science, Universitas Duta Bangsa Surakarta
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COMPARATIVE ANALYSIS OF MANUFACTURER VS. RETAILER REFURBISHING MODELS: PROFITABILITY, PRODUCTION EFFICIENCY, AND STRATEGIC IMPLICATIONS Sudibyo, Nugroho Arif; Farida, Anisatul; Kurdhi, Nughthoh Arfawi
Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Vol. 5 No. 3 (2024): Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistik
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/lb.v5i3.744

Abstract

This paper explores the profitability and operational efficiency of refurbishing models managed by manufacturers versus retailers, focusing on equilibrium pricing, production quantities, and profit outcomes in each scenario. It reveals that the retailer refurbishing model often leads to higher production quantities and greater profitability for manufacturers, particularly when refurbishing costs are significant or when manufacturers do not achieve notable efficiency gains through intelligent manufacturing. In contrast, the manufacturer refurbishing model may be less advantageous when these conditions are unfavorable. The findings underscore the need for manufacturers to carefully assess refurbishing costs, potential efficiency improvements, and market dynamics before selecting a refurbishing strategy. This study provides practical insights for optimizing refurbishing decisions and contributes to the broader understanding of supply chain management. Additionally, it sets the foundation for future research on how emerging technologies and market trends may influence the effectiveness of different refurbishing models.
KEMANDIRIAN DAN MOTIVASI BELAJAR MATEMATIKA DALAM PEMBELAJARAN DARING MATA KULIAH METODE NUMERIK: K-MEANS CLUSTER ANALYSIS Nurcahyo, Adi; Setyowati, Elis; Rahma, Tara Kamila; Musthofa, Akbar Fadel Dwiki; Sudibyo, Nugroho Arif
Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Vol. 6 No. 1 (2025): Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistik
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/lb.v6i1.579

Abstract

The purpose of this study is to determine the clustering of student independence and learning motivation in the Numerical Methods course during online lectures. Based on the clustering carried out, clusters are obtained according to predetermined criteria. This can be a reference for educators to determine strategies to solve problems. The method used is cluster analysis with the K-Means method using Orange software. The research was carried out on 5th semester students who took Numerical methods courses for the 2020/2021 academic year as many as 4 classes. The data collection technique uses documentation methods derived from UTS scores in the Numerical Methods course for the 2020/2021 academic year and the questionnaire method for independence and motivation for online learning during the pandemic. The results obtained from the research conducted are that in cluster C1 students with independence and high motivation have high GPA and IPS as well. Meanwhile, the C2 cluster is dominated by students with a moderate level of independence and motivation who also have a medium IPS and GPA. In Cluster C3, students have a relatively moderate level of independence and motivation which results in low social studies and GPA. From these results, it can be concluded that the high and low social studies and GPA can be influenced by student independence and learning motivation.
Sistem Pakar Gizi Balita: Kerangka Kerja Konseptual Untuk Deteksi Gizi Buruk Nugroho, Suryanto; Sudibyo , Nugroho Arif
Decode: Jurnal Pendidikan Teknologi Informasi Vol. 4 No. 3: NOVEMBER 2024
Publisher : Program Studi Pendidikan Teknologi Infromasi UMK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51454/decode.v4i3.810

Abstract

Penelitian ini bertujuan untuk mengembangkan kerangka kerja sistem pakar yang dapat mendeteksi gizi buruk pada balita melalui penerapan teori Dempster-Shafer dan metode Pengambilan Keputusan Berbasis Multi-Atribut (MADM). Kerangka kerja ini dirancang untuk meningkatkan akurasi dan efisiensi dalam proses diagnosis dengan memanfaatkan analisis ketidakpastian yang dihadapi oleh anak-anak. Melalui integrasi kedua pendekatan tersebut, sistem pakar diharapkan dapat memberikan rekomendasi yang tepat dan relevan berdasarkan gejala yang dimasukkan oleh pengguna. Selain itu, penelitian ini juga menekankan pentingnya akuisisi pengetahuan dari para ahli gizi untuk membangun basis pengetahuan yang kuat, sehingga sistem dapat beradaptasi dengan kebutuhan diagnosis dan perkembangan pengetahuan gizi terkini. Kerangka kerja yang diusulkan diharapkan dapat menjadi alat yang efektif bagi tenaga kesehatan dalam mengidentifikasi dan menangani masalah gizi buruk, serta meningkatkan kesadaran masyarakat tentang pentingnya kesehatan gizi anak.
Mengubah Limbah Kayu Menjadi Produk Bernilai Tinggi di Industri Kreatif Nughthoh Arfawi Kurdhi; Saputro, Dewi Retno Sari; Widyaningsih, Purnami; Sutanto, Sutanto; Setiyowati, Ririn; Sudibyo, Nugroho Arif
PaKMas: Jurnal Pengabdian Kepada Masyarakat Vol 4 No 2 (2024): November 2024
Publisher : Yayasan Pendidikan Penelitian Pengabdian Algero

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54259/pakmas.v4i2.3252

Abstract

The UMKM involved in this community partnership program is engaged in the production of teak wood furniture. The issues currently faced are (1) a limited range of furniture products and (2) traditional management and marketing methods. This study aimed to implement technological induction to enhance productivity, creativity, and competitiveness within these UMKMs. The technological induction involved providing modern production tools for creating innovative products and developing an application boot program and server computer to enhance marketing efforts. A mixed-methods approach was used, combining case study observations and user-centred design principles to create technological solutions. The program's outcomes were assessed through partner training and mentoring, employing a problem-solving approach to address post-implementation challenges. The study found that introducing advanced production tools and digital marketing strategies significantly increased the variety of products, streamlined production processes, and expanded market reach, positioning the UMKMs for improved competitiveness in the national market. This research underscores the importance of integrating technology into small-scale industries for sustainable growth. Future efforts should focus on scaling these practices to other creative sectors for broader economic impact.
Analisis Sentimen Terhadap Aplikasi KitaLulus Menggunakan Metode Naive Bayes dari Ulasan Google Play Store Putri, Nadia Amalia; Srirahayu, Agustina; Sudibyo, Nugroho Arif
Smart Comp :Jurnalnya Orang Pintar Komputer Vol 14, No 2 (2025): Smart Comp: Jurnalnya Orang Pintar Komputer
Publisher : Politeknik Harapan Bersama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30591/smartcomp.v14i2.7230

Abstract

Aplikasi pencarian pekerjaan seperti KitaLulus menjadi penting untuk membantu lulusan menemukan pekerjaan sesuai dengan keahlian dan minat dan bakat mereka. Analisis sentimen diperlukan untuk memahami pandangan pengguna terhadap aplikasi KitaLulus. Metode Naive Bayes digunakan dalam analisis ini karena efisiensinya dan akurasi tinggi dalam klasifikasi sentimen. Penelitian ini memanfaatkan 597 data ulasan yang diambil dari ulasan pengguna aplikasi didalam google play store dengan metode web scraping menggunakan library google-play-scraper. Pengolahan analisis sentimen pada dataset diberi label positif, netral, dan negatif. Data diolah menggunakan metode naïve bayes berhasil mencapai tingkat akurasi sebesar 91%. Hasil evaluasi menunjukkan bahwa presisi, recall, dan f1- score untuk sentimen positif berturut-turut adalah 0.99, 0.94, dan 0.97. Di sisi lain, kinerja model lebih rendah pada sentimen negatif dan netral. Hasil analisis sentimen positif menunjukan bahwa aplikasi KitaLulus telah diterima dan mendapatkan ulasan baik oleh para penggunanya. Penelitian ini bertujuan untuk meningkatkan pemahaman terhadap sentimen pengguna terhadap aplikasi KitaLulus dan memberikan kontribusi berharga bagi pengembang dalam usaha meningkatkan kualitas aplikasi tersebut.
PEMBERDAYAAN UMKM BERBASIS KAYU DI DESA PANDEYAN, KABUPATEN BOYOLALI: INDUKSI TEKNOLOGI DAN OPTIMALISASI LIMBAH KAYU UNTUK PRODUK KREATIF DAN BRIKET Nughthoh Arfawi Kurdhi; Dewi Retno Sari Saputro; Purnami Widyaningsih; Sutanto, Sutanto; Ririn Setiyowati; Ade Susanti; Dwi Purnama; Nugroho Arif Sudibyo
J-ABDI: Jurnal Pengabdian kepada Masyarakat Vol. 5 No. 4: September 2025
Publisher : Bajang Institute

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

Abstract

Program pengabdian masyarakat ini bertujuan memberdayakan UMKM berbasis kayu di Desa Pandeyan, Kabupaten Boyolali, melalui induksi teknologi dan optimalisasi pemanfaatan limbah kayu menjadi produk kreatif dan briket ramah lingkungan. Desa Pandeyan memiliki potensi kayu yang melimpah, namun selama ini limbah kayu belum termanfaatkan secara optimal sehingga menimbulkan masalah lingkungan dan hilangnya nilai tambah ekonomi. Kegiatan dilaksanakan melalui pelatihan teknologi induksi, workshop pengolahan limbah kayu, pembuatan briket, pendampingan produk kreatif, serta dukungan hibah laptop, kamera, dan domain hosting untuk digital marketing. Hasil kegiatan menunjukkan peningkatan keterampilan UMKM dalam mengolah limbah kayu menjadi produk bernilai tinggi, sekaligus memperluas akses pasar melalui platform digital Martha Meubel. Program ini berdampak positif secara teknis, ekonomi, sosial, dan lingkungan, serta berpotensi menjadi model replikasi bagi pengembangan ekonomi kreatif berkelanjutan.
In-House Refurbishing and Outsourcing Refurbishing Models with Degree of Interchangeability in Product Design Kurdhi, Nughthoh Arfawi; Vania, Kezia Abigail; Widyaningsih, Purnami; Sudibyo, Nugroho Arif
JTAM (Jurnal Teori dan Aplikasi Matematika) Vol 7, No 4 (2023): October
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jtam.v7i4.15787

Abstract

Refurbishing is the process of processing used products into products with the quality of new products. Refurbishing can be done by the manufacturer itself (in-house) or the manufacturer can delegate the refurbishing process to other manufacturers (outsourcing). This research aims to construct an in-house refurbishing model and an outsourced refurbishing model, determine the optimum solution, analysis, and application so that optimum benefits are obtained, and compare the in-house refurbishing model and the outsourced refurbishing model. Multivariable function optimization is used to get optimum profit. Judging from the optimum production results, manufacturers who carry out in-house refurbishing choose a higher degree of interchangeability and produce more new products. Products with an interchangeability design are products that can be used to replace similar products with the same function. Based on economic benefits, manufacturers who carry out in-house refurbishing get greater profits than outsourcing refurbishing. Viewed from environmental sustainability, outsourcing refurbishing is more environmentally friendly than in-house refurbishing.
UTILIZATION OF AI IN MARKETING CREATIVE PRODUCTS MADE FROM WOOD WASTE IN THE CRAFTSMEN COMMUNITY OF NGEMPLAK DISTRICT, BOYOLALI REGENCY Siswanto, Siswanto; Nughthoh Arfawi Kurdhi; Nugroho Arif Sudibyo; Supriyadi Wibowo; Putranto Hadi Utomo
J-ABDI: Jurnal Pengabdian kepada Masyarakat Vol. 5 No. 5 (2025): Oktober 2025
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/jabdi.v5i5.11546

Abstract

This study explores the application of Artificial Intelligence (AI) to enhance the aesthetic quality and design innovation of creative products made from wood waste in Ngemplak District, Boyolali Regency, Indonesia. Local craftsmen in this area often face challenges in improving product appearance due to limited access to design tools and technological resources. By integrating AI-based design systems, such as generative design algorithms, image enhancement models, and style transfer techniques, artisans can develop more appealing, modern, and market-responsive product designs while maintaining the authenticity of local craftsmanship. The use of AI not only supports creativity and efficiency in the product development process but also contributes to sustainability by increasing the added value of upcycled wood materials. This study highlights how AI-driven visual enhancement can bridge traditional craftsmanship with digital innovation, promoting competitiveness and sustainable growth in rural creative industries.
Analisis Hasil Belajar, Gender dan Self Regulated Learning (SRL) Mahasiswa Menggunakan Algoritma K-Means Clustering Muhammad Wahid Syaifuddin; Septiana Wijayanti; Nugroho Arif Sudibyo
Khatulistiwa: Jurnal Pendidikan dan Sosial Humaniora Vol. 2 No. 2 (2022): Juni : Jurnal Pendidikan dan Sosial Humaniora
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/khatulistiwa.v2i2.540

Abstract

The purpose of this research is to use a clustering algorithm on learning outcomes, gender, and SRL. In this study, the K-Means clustering method was used. In this study, the calculation process is assisted by Orange software. Determination of the number of clusters with Orange software based on the Silhouette Score. The results show that there are seven clusters with three variables, namely learning outcomes, gender, and self-regulated learning. From these clusters, it can be used for group formation and student mapping.
Hubungan antara Internet Self-Efficacy dengan Prestasi Belajar Siswa Sekolah Menengah Atas (Fokus: Analisis Cluster dengan Metode K-Means dan Louvain) Syaifuddin , M Wahid; Sudibyo, Nugroho Arif; Irfan, Muhammad
Jurnal Studi Guru dan Pembelajaran Vol. 6 No. 3 (2023): September - Desember 2023
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/jsgp.6.3.2023.2654

Abstract

Internet self-efficacy (ISE) was initiated by Albert Bandura, self-efficacy (SE) is a widely accepted concept that refers to an individual's belief in his ability to complete certain behaviors or tasks in certain situations. The purpose of this study was to determine the relationship between ISE and the learning achievement of 12th-grade high school students. The sample of this study was 12th-grade MIPA 7 SMA Unggulan CT ARSA Foundation Sukoharjo as many as 21 students. ISE data is data obtained from questionnaires distributed to students who have been tested for validity and reliability. On the other hand, learning achievement tests were conducted on students with three-dimensional material. The analysis conducted to determine the relationship between the two variables is bivariate analysis. The results showed that between the ISE variable and Student Learning Achievement, a correlation coefficient value of 0.670 was obtained with a significant relationship between the ISE variable and Student Achievement. The degree of bond correlation value shows a strong/sturdy correlation.
Co-Authors Ade Susanti Adri Surya Kusuma Agustina Srirahayu Aldi Wahyudi Arta Anisatul Farida Ardymulya Iswardani Ardymulya Iswardani Arif Wicaksono Septyanto Atina, Vihi Bowo Winarno Budiyono Budiyono Deddy Rahmadi Dewi Retno Sari S Dewi Retno Sari Saputro Dewi Retno Sari Saputro, Dewi Retno Diari Indriati Dwi Purnama Edy Kurniawan Faizal Khusnul Ramatullah Fanny Widadie Galih, Rhezka Mahendra Hasanah, Herliyani Imam Sujadi Iswardani, Ardymulya Jamilatun Safitri Kartika Sari M. Wahid Syaifuddin Martini, Titin Sri Moh Muhtarom Mohamad Waluyo Muhammad Irfan Muhammad Irfan Muhammad Wahid Syaifuddin Muslimin Musthofa, Akbar Fadel Dwiki Nadia Amalia Putri Naufal Ishartono Nughthoh Arfawi Kurdhi, Nughthoh Arfawi Nugroho, Suryanto Nur Mahar Aji mahar Nurcahyo, Adi Nurmalitasari Nurmalitasari Nurmalitasari Nurmalitasari Permadi Eka Setyawan Pradipta Annurwanda Purnami Widyaningsih Putranto Hadi Utomo Putranto Hadi Utomo Putri, Nadia Amalia Rahma, Tara Kamila Ririn Setiyowati S Siswanto Septiana Wijayanti Setiyowati, Ririn Setyowati, Elis Siti Komsatun Siti Suprihatiningsih Supriyadi Wibowo Sutanto Sutanto Syaifuddin , M Wahid Tiyan Ganang Wicaksono Tri Atmojo Kusmayadi Tri Atmojo Kusmayadi Tri Purwanto Triana Harmini Tyan Ganang Wicaksono Vania, Kezia Abigail Vihi Atina Wahyu Hidayat Wahyu Hidayat Wahyu Hidayat Wijayanti, Septiana YOHANA PUTRA SURYA RAHMAD HIDAYAT Yohana Putra Surya Rahmad Hidayat Yohana Putra Surya Rahmad Hidayat