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All Journal EKSAKTA: Journal of Sciences and Data Analysis Jurnal Statistika Universitas Muhammadiyah Semarang Jurnal Karya Pendidikan Matematika Jurnal Matematika dan Statistika serta Aplikasinya (Jurnal MSA) Register: Jurnal Ilmiah Teknologi Sistem Informasi Jurnal Fourier Indonesian Journal of Applied Statistics Seminar Nasional Variansi (Venue Artikulasi-Riset, Inovasi, Resonansi-Teori, dan Aplikasi Statistika) BAREKENG: Jurnal Ilmu Matematika dan Terapan JITK (Jurnal Ilmu Pengetahuan dan Komputer) Unisda Journal of Mathematics and Computer Science (UJMC) JTAM (Jurnal Teori dan Aplikasi Matematika) J Statistika : Jurnal Ilmiah Teori Dan Aplikasi Statistika Jurnal Ilmiah Pendidikan dan Pembelajaran B-Dent, Jurnal Kedokteran Gigi Universitas Baiturrahmah EIGEN MATHEMATICS JOURNAL Variance : Journal of Statistics and Its Applications Jurnal Saintika Unpam : Jurnal Sains dan Matematika Unpam Square : Journal of Mathematics and Mathematics Education Community Development Journal: Jurnal Pengabdian Masyarakat ESTIMASI: Journal of Statistics and Its Application Majalah Ilmiah Matematika dan Statistika (MIMS) Soeropati: Journal of Community Service Journal of Intelligent Computing and Health Informatics (JICHI) JAMBURA JOURNAL OF PROBABILITY AND STATISTICS LOSARI: Jurnal Pengabdian Kepada Masyarakat JURNAL INOVASI DAN PENGABDIAN MASYARAKAT INDONESIA Tepis Wiring : Jurnal Pengabdian Masyarakat Journal Focus Action of Research Mathematic (Factor M) Jurnal Statistika dan Komputasi (STATKOM) Journal of Data Insights Jurnal Statistika dan Sains Data Prosiding Seminar Nasional Unimus Parameter: Jurnal Matematika, Statistika dan Terapannya Jurnal Statistika Industri dan Komputasi Journal of Mathematics, Computation and Statistics (JMATHCOS) Emerging Statistics and Data Science Journal Amalgamasi: Journal of Mathematics and Applications Data Science Insights RAGAM: Journal of Statistics and Its Application
M. Al Haris
Department Of Statistics, Universitas Muhammadiyah Semarang, Semarang, Indonesia
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Implementasi Teknologi Ramah Lingkungan untuk Menunjang Sektor Pertanian di Desa Margohayu Karangawen Demak M. Al Haris; Dannu Purwanto; Ali Imron; RA. Qonita Syalsabilla Handayani; Arya Praditya
LOSARI: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 2 (2024): Desember 2024
Publisher : LOSARI DIGITAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53860/losari.v6i2.349

Abstract

Margohayu village is one of the regions in the Karangawen Subdistrict, Demak Regency, Central Java. Desa Margohayu has a population of 8,056, with the majority working as farmers. Currently, the irrigation of rice fields in Desa Margohayu still relies on fossil fuel-based energy, which gradually depletes and has environmental consequences. However, Desa Margohayu has significant potential to establish a self-sustaining energy system by harnessing solar energy. Sunlight can be converted into electricity through solar panels to power water pumps. Therefore, the Community Service Team from Universitas Muhammadiyah Semarang proposes an environmentally friendly and sustainable technology implementation in the agricultural sector through the Margo Mulyo Farmer Group in Desa Margohayu. The goal is to reduce the negative impact of fossil fuel usage that has been prevalent. The results of this initiative show that the Margo Mulyo Farmer Group gains knowledge and skills related to solar energy utilization. The implementation of this technology is expected to reduce agricultural costs, particularly in the irrigation process.
Implementasi Sistem Rekomendasi Mitigasi Layanan Sertifikasi Produk Halal Berbasis Blockchain pada LP UMKM Muhammadiyah Kota Semarang Saeful Amri; M. Al Haris; Dwi Purnomo Putro; Mandala Adikara Sencoko
LOSARI: Jurnal Pengabdian Kepada Masyarakat Vol. 7 No. 2 (2025): Desember 2025
Publisher : LOSARI DIGITAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53860/losari.v7i2.521

Abstract

The Muhammadiyah Regional Leadership (PDM) of Semarang City has an MSME Development Institute (LP). This institution has a specific mission in developing MSMEs in growing, mobilizing, improving and empowering the potential of MSMEs in the national and global business arena. This community service activity is to implement a distributed system to develop the creative industry and encourage entrepreneurship in the field of digital technology and innovation and can increase responsible consumption and production in terms of halal consumer products for Muhammadiyah MSMEs in Semarang City. This activity includes socialization, training on system operation, implementation, mentoring and monitoring. The results show that the implementation of the system can document the data of MSMEs well by 75%, halal product certification for MSMEs increased by 80%, and skills in operating the system are increasing, based on the satisfaction level reaching 91% after the activity. This program proves that utilizing technology can provide convenience in verifying data for the halal certification process and increase security and reduce the risk of data loss.
Pelatihan Diversifikasi Olahan Produk berbahan Beras Hitam untuk Meningkatkan Nilai Ekonomi di Desa Glesungrejo Kabupaten Wonogiri M. Al Haris; Nurhidajah; Amin Samiasih; Fitri Anjani; Alya Febriyani; Ayesha Nayla Salsadella; Anne Mutiara Wardani; Aulia Dewi Gustiarni; Syafina Amira Firdaus; Ilham Khairul Anam; Marsela Ayu Irdiana; Miftakhurizki; Mualim Tahari
LOSARI: Jurnal Pengabdian Kepada Masyarakat Vol. 7 No. 2 (2025): Desember 2025
Publisher : LOSARI DIGITAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53860/losari.v7i2.528

Abstract

Glesungrejo Village, located in Baturetno Subdistrict, Wonogiri Regency, possesses considerable agricultural potential, with the majority of its population engaged in farming. Nevertheless, this potential has not yet provided optimal contributions to the local economy due to limitations in managing agricultural products to enhance their added value. This condition underscores the need for integrative strategies that can link the utilization of natural resources with the strengthening of the local economy in a sustainable manner. Through a grant from the Ministry of Education, Culture, Research, and Technology under the Community Empowerment scheme, the Student Executive Board of the Faculty of Agricultural Science and Technology, Universitas Muhammadiyah Semarang (BEM FSTP UNIMUS), initiated a program to develop innovations in local agricultural products. The program involved the Women Farmers’ Group (Kelompok Wanita Tani/KWT) as the primary partner in improving product quality and added value, with a focus on the flagship commodity of black rice. The outcomes demonstrated a significant improvement in participants’ understanding of black rice processing, ranging from drying using a cabinet dryer, flour production, to the formulation of food products such as cookies, snack bars, muffins, and herbal beverages. In addition to technical skill enhancement, participants were also able to operate production equipment independently. The establishment of micro-enterprises and the emergence of local cadres as community facilitators serve as indicators of the program’s success in fostering socio-economic empowerment based on post-harvest innovation. Overall, this initiative contributes to strengthening community capacity and enhancing the competitiveness of agricultural products.
Comparison of k-Means and Hierarchical Clustering (Ward) Methods for Clustering Regencies/Cities Based on the Food Security Index in West Java Province Al Aghni Naufalia; Nurmawati Ainun Hidayana; Muhammad Bahaudin; Fathir Naufal Hasan; M Al Haris; Alwan Fadlurohman
Data Science Insights Vol. 4 No. 2 (2026): Journal of Data Science Insights
Publisher : PT. Visi Media Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63017/jdsi.v4i2.241

Abstract

Food security in West Java Province exhibits significant variation across regencies/cities, influenced by differences in socioeconomic conditions, health, and sanitation. This condition necessitates an analytical approach based on regional clustering to support the formulation of more precise policies. This study aims to cluster regions based on the Food Security Index (FSI) and to evaluate the performance of K-Means and Hierarchical Clustering (Ward) in producing an optimal cluster structure. The data used comprised 27 regencies/cities with eight standardized FSI indicators. Cluster quality was evaluated using the Silhouette Coefficient and the Davies-Bouldin Index. The results indicate that the optimal FSI structure is divided into three clusters, each exhibiting distinct regional characteristics. Both methods produced consistent patterns; however, K-Means demonstrated superior performance to Ward, yielding a Silhouette Coefficient of 0.3048 and a Davies-Bouldin Index of 1.0725, which were respectively higher and lower than those obtained by Ward (0.2806 and 1.1241). This finding indicates the superiority of K-Means in forming more compact and well-separated clusters within relatively homogeneous data. Further analysis reveals that disparities in food security are primarily influenced by access to sanitation, poverty, education, and the ratio of health workers. This study provides empirical evidence on the effectiveness of clustering methods for FSI analysis and offers a regional clustering framework capable of supporting data-driven food security policy formulation at the regional level.
The ARIMA-GARCH Method in Case Study Forecasting the Daily Stock Price Index of PT. Jasa Marga (Persero) Ihsan Fathoni Amri; Wulan Sari; Velia Arni Widyasari; Nufita Nurohmah; M. Al Haris
Eigen Mathematics Journal Vol 7 No 1 (2024): June
Publisher : University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/emj.v7i1.174

Abstract

PT Jasa Marga is a large company in Indonesia that develop and operation the toll roads and is known as one of the blue chip companies with LQ45 shares. However, share prices have high volatility or rise and fall quickly so their value is always changing. Therefore, forecasting is needed to predict the share price of PT Jasa Marga in the future in order to know the movement of its share price. The Autoregressive Integrated Moving Average (ARIMA) method is a method that can predict data with high volatility, but has the disadvantage of residuals containing heteroscedasticity. So, the addition of the Generalized Autoregressive Conditional Heteroskedasticity (GARCH) model was carried out to overcome the heteroscedasticity problem that was initially caused by the ARIMA model so it could predict data with high volatility more optimally. Therefore, this research applies the ARIMA-GARCH method to find the best model for forecasting the daily share price index of PT Jasa Marga. The data used comes from the daily closing stock price index of PT Jasa Marga (Persero) for the period January 2015 to May 2023. The measurement of forecasting accuracy uses the Mean Absolute Percentage Error (MAPE). The forecasting results show that the best model uses ARIMA (2,1,1) - GARCH (1,3) with a MAPE value of 6.825728%, which indicates very good forecasting results because the MAPE value is <10%.
Forecasting the Volatility of Tuna Fish Prices in North Sumatra using the ARCH Method in the Period January - April 2024 Riska Multiyaningrum; Ihsan Fathoni Amri; M. Al Haris; Havinka Angel Salsabilla; Heppy Nur Asavia Ginasputri; Salsabila Dhea Sintya
Eigen Mathematics Journal Vol 7 No 2 (2024): December
Publisher : University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/emj.v7i2.236

Abstract

Tuna (Euthynnus affinis) is one of the most important fisheries commodities in Indonesia with significant economic value, especially in its contribution to fisheries export revenue. However, the price of tuna experiences significant fluctuations that can affect local and national economic stability. This study analyzes the daily price fluctuations of tuna in the North Sumatra market from January 1, 2024 to April 29, 2024 using a time series analysis approach. Daily price data were collected and analyzed to identify existing price patterns and volatility. The Autoregressive Conditional Heteroskedasticity (ARCH) model was selected to address the heteroscedasticity in the data, which suggests that the volatility of tuna prices can be well predicted based on past price behavior. The analysis steps include identifying the optimal ARCH model using the Autocorrelation Function (ACF) and Partial Autocorrelation Function (PACF), as well as testing parameter significance and normality assumptions to validate the model fit. The results show that the ARMA (1,0,0) model is the optimal one to model the price volatility of yellow tuna with the MAPE obtained of 2.382. compared to the ARMA-ARCH method with the MAPE value obtained of 2,747. Because it still contains heteroskedasticity effects, even though the results are good, the prediction results do not closely match the original data. The model is effective in improving price forecasting accuracy, which is important to support decision-making in risk management and economic planning in the fisheries sector. The findings contribute to understanding the dynamics of the yellowtail market and optimizing strategies for fisheries management.
Co-Authors Abdul Ghufron Abidah, Khansa Ni'mal Abimanyu Arya Ramadhan Ach Ridoi Alambara Adhwaningrum, Arullah Salsabila Agata Dwi Putri Putri Agi Khoerunnisa Ahmad Jundi Ismail AHMADI Ainurrafiq Dawam Ainurrofiah, Safira Al Aghni Naufalia Albertus Dion Sarah Ali Imron Ali Imron Alia Permata Alwan Fadlurohman Alya Febriyani Amalia Jihan Syafiqoh Amin Samiasih Amri, Saeful Amrullah, Ahmad Amrullah, Setiawan Anggoro, Vernanda Kresna Anis Priyanti Anne Mutiara Wardani Ardana Setiawan, Deftha Ariska Fitriyana Ningrum Arya Praditya Arya, Abimanyu Asriyanti Sawiah Adam Astuti, Sofi Anggi Asyfani, Yusrisma Aulia Dewi Gustiarni Aulia Fadhli Boer Ayesha Nayla Salsadella Ayomi, Nun Maulida Suci Ayu Wulandari Ayuda Nur Sukmawati Azzahrani, Rahma Dewi Bahaudin, Muhammad Barlian, Seftia Amelia Rizki Bunga Ayuningrum Choirudin, Mochamad Fahmi Choirunnisa Hasna Nisa Cika Awani Ayuwida Dannu Purwanto danu priambodo Dea Zahra Khairunnisa Devina Nadifa Nur Aulia Diani, Nandini Lova Dimar Pangestika Sari Dwi Purnomo Putro Dzeaulfath, Muhammad Eko Andy Purnomo Elfina Latifah Safira Eny Winaryati Eny Winaryati Ermawati, Asti Erna Julia Nanga Evida Oktaviana Fabiola, Gwenda Fadhilah Azzahra Fadillah, Muhammad Reza Faninda Aidina Fitri Fathir Naufal Hasan Fatkhurrokhman Fauzi Fauzi, Fatkhurokhman Fazia Risnita Widiyana Febrianti, Fatika Lovina Febryana Dilla Setyaningrum Firdatul Fahria Firdaus, Falah Tinton Firochul Masichah Fisabilillah, Muh. Irodat Fitri Anjani Fitri Diana Musa Fitria Fatichatul Hidayah Gautama, Rahmad Putra Hafiza Abas Haris, M Al Haris, M. Al Havinka Angel Salsabilla Havinka Angel Salsabilla Heppy Nur Asavia Ginasputri Heppy Nur Asavia Ginasputri Herculianus Rowa Dawi Hidayat, Muhamad Arif Hilma Hanna Mahanna Haqq Himmaturrohmah, Laily Husna, Rizqa El Iffah Norma Hidayati Ihsan Fathoni Ihsan Fathoni Amri Ikhwanudin, Muhamad Ilham Khairul Anam Imelya Susianti Inayah Pangestu, Eka Indah Fitriyani Indah Manfaati Nur Indah Manfaati Nur Indriani, Anita Retno Irawan, Alfian Chandra Isnaini Maulida Iva Aurellia Khalif Jesicha Arsusma Kaia Raissa Akmalia Kaia Raissa Akmalia Kamilah Citra Chumairoh Kamilah Citra Khumairoh Khansa' Ni'mal 'Abidah Khikman, Muhammad Alvaro Khoirul Huda Kinanta, Ailsha Syafa Latisa Alifa Maura Lea Angelina Lein, Raymond Bolly Linda Puspitasari Lydia Nur Sa&#039;adah Lydia Nur Sa'adah Lydia Nur Sa'adah Mandala Adikara Sencoko Marsela Ayu Irdiana Masudah, Nurhidayatul Miftakhiyah Fazza Baita Miftakhul Haris Miftakhurizki Mochamad Hasyim Mualim Tahari Mufidatul Ulya Muhammad Alvaro Khikman Muhammad Bahaudin Muhammad Hali Mukron Muhammad Najwan Kamil Muhammad Rifqy Ardiansyah Muhammad Saifuddin Nur Multiyaningrum, Riska Nadia Khoirunnafisa Salma Nandini Lova Diani Nasyiatul Izzah Nikmah Handayani Ninu, Maria Febronia Nufita Nurohmah Nugroho, Muhammad Dimas Alfian Nur Arifah, Miftah Nurfuad, Khilmi Nurhidajah Nurmalita, Rahma Nurmawati Ainun Hidayana Okiyanto, Rizal Pandiriyan, Muhammad Tegar Prastiwi, Harvina Sindy Prastyo, Ikwan Pratama, Rifin Fadilla Pratama, Rizky Adi Priambodo, Danu Prissy Nusaiba Yulisa Prizka Rismawati Arum Purnama, Estyaningsi Puspitasari, Linda Putra, Septian Malik Putri Wahyu Muharamah Putri, Melfia Verahma R.A Qonita Syalsabilla Handayani RA. Qonita Syalsabilla Handayani Rahma Nurmalita Rahma Safira Raka Nurhaq Mulya Hartanto Ramadhan, Abimanyu Arya Ramadhan, Wulan Nur Rangga Sa'adillah SAP Rendi Andika Putra Revika Inta Nur Kholifah Ridwanulhaq, Alfina Fauziah Riska Multiyaningrum Riska Multiyaningrum Riska Multiyaningrum Rochdi Wasono Rochdi Wasono Rochdi Wasono Ryan Mahardika Saeful Amri Saeful Amri Salmah Salmah Salsabila Dhea Sintya Salsabila Rahma Anisa Salwa Salsabila, Galuh Sam'an, Muhammad Sanmas, Safril Ahmadi Saputri, Atika Dwi Sari, Selvi Ana Windia Septi Winda Utami Septia, Siti Fajar Sesotyaning Harum Prabuningrat Shinta Amaria Sidqi, Isnaeni Miftahul Siswahyudianto Siti Hamidah Ardhy Siti Nurhalisa siti wulandari Suci Izzati Suci Laeliyah Suci Mega Puji Lestari Suherdi, Andri Sulistiya, Indah Sulistiyani, Dwi Sunday Emmanuel Fadugba Supriadin Supriadin Supriadin Supriadin Syafina Amira Firdaus Syaharani, Nabbila Dyah Tiani Wahyu Utami Tresiani Yunitasari Tri zahrotun Wahyuningsih Ulinuha, Samikoh Utami, Rossy Prima Nada Utiningtyas, Almas Rizki Velia Arni Widyasari Wahid, Siti Nurasriyanti Wahyuningsih, Andria Watur, Annisa Cahyaningrum Widiyanti, Karin Dita Wulan Sari Wulan Sari, Wulan Yan Nazala Bisoumi Yolan Triky Yulia Nur Kumala Yulianita, Tanti