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Penerapan Metode Fuzzy Backpropagation Neural Network dalam Peramalan Saham PT. Bank Rakyat Indonesia (Persero) Tbk. (IDX: BBRI) Cahyono, Budi Cahyono; Purnamasari, Ika; Goejantoro, Rito
Mandalika Mathematics and Educations Journal Vol 7 No 4 (2025): Desember
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v7i4.10026

Abstract

The Fuzzy Backpropagation Neural Network (FBPNN) is a forecasting approach based on neural networks that applies the backpropagation learning algorithm, where input and output data are expressed in fuzzy membership values. The construction of the FBPNN model consists of three key phases: fuzzification, neural network training, and defuzzification. In the defuzzification stage, the Smallest of Maximum (SOM) technique is used to determine the lowest value among the members with the highest degree of membership. This research employs FBPNN to forecast the weekly closing prices of PT Bank Rakyat Indonesia (Persero) Tbk. (IDX: BBRI). The dataset is divided into 90% for training and 10% for testing. The results indicate that the best network architecture is 20–4–2, producing a Root Mean Square Error (RMSE) of 728,5308 for training data and 178,2089 for testing data. The Mean Absolute Percentage Error (MAPE) reached 10,3620% (classified as good) in training and 3,9189% (classified as very good) in testing. The developed model was then applied to forecast the next five periods, showing a tendency of increasing stock prices
Transfer Knowledge Teknologi Pertanian Modern berbasis Hidroponik Tipe Dutch Bucket pada Tanaman Cabai Merah (Capsicum annuum L.) di Desa Kepanjen, Kecamatan Gumukmas, Kabupaten Jember Saputra, Tri Wahyu; Wijayanto, Yagus; Ristiyana, Suci; Purnamasari, Ika; Brian, Ida Bagus Daniswara; Burhanudin, Ahmad; Arthayasa, Raden Mochammad Yudishtira Ageng; Antonio, Ach. Farhad Septian
Jurnal ABDINUS : Jurnal Pengabdian Nusantara Vol 10 No 2 (2026): Volume 10 Nomor 2 Tahun 2026
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/ja.v10i2.24112

Abstract

Red chili is one of the agricultural commodities cultivated in Kepanjen Village, Gumukmas District, Jember Regency. The unpredictable fluctuations in weather demand the application of modern agricultural technology that can enhance productivity while ensuring the sustainability of cultivation. As part of a community service program, the dutch bucket hydroponic system placed inside a greenhouse was introduced as an alternative solution for red chili cultivation. The program was implemented through three stages, namely preparation, implementation, and monitoring and evaluation, with students actively involved as facilitators and the community as the main partners. During the implementation stage, a greenhouse measuring 3 × 6 meters (18 m²) was successfully constructed, and a dutch bucket hydroponic installation was set up to accommodate 60 chili plants. The results of the activity showed that farmers and community members who participated in the socialization responded positively and demonstrated high enthusiasm toward the cultivation method applied. Thus, this program not only produced physical facilities in the form of a greenhouse and hydroponic installation but also contributed to improving the knowledge and skills of the community in adopting modern agricultural technologies.
Co-Authors . Usmadi Abda Abda Abdillah, Moc. Reza Wahyu Abdul Haris Adhitya Wardhono Adi Pramono, Mahasyin Adinda Dwi Saputri Agnesia Margareta Purba Agung Nugroho Puspito Agung Sih Kurnianto Agustianto, Rezky Ahmad Ilham Tanzil Al-Ghofiqi, M. Faris Alfatah, Naufal Akbar Alfian Hidayat Alima, Isna Alpida Sari ALVIANA, FIFI Alya Zahra Lirinza Amelia Tri Arsita Amelia, Pidia Anam, M Khairul Anam, M. Khairul Andjani, Nazwa Anggreini, Rizqi Aprilia Putri Anisa Ell Raharyani Anisah, Retno Lusmiati Anna Apriana Hidayanti Antonio, Ach. Farhad Septian Aprilianti, Rina Ari Setyawati Ariessela, Syeli Arisya Rajagukguk Arthayasa, Raden Mochammad Yudishtira Ageng Arthur Frans Cesar Regar Arthur Frans Cesar Regar Aruan, Friska Fransiska Arum, Ayu Puspita Arumsari, Melisa Arwan Arwan Aryana, Ida Bagus Putu Aryati, Ayu Ashari Siregar Asrul, Annisa Aprilia Astuti, Banar Astuti, Wahyu Tri Atira, Nurul Aurela, Rosalina Diva Azimah, Siti Syariah A’yun, Qonita Qurrota Bahriah, Ayu Belia Mutiara Aprili Br Depari Brena Risky Brian, Ida Bagus Daniswara Budiman, Subhan Arif Burhanudin, Ahmad Cahyono, Budi Cahyono Candra Dewi Rahayu Candra Dewi Rahayu, Candra Dewi Charisma, Ilmiyatul Fitri Cindy Febrian, Berlian Ciplis Gema Qori’ah Clarissa Myra Ananta Daffa, Muhamamd Zulfiqar Dalimunthe, Mutiara Nazla Damanik, Selvia Andriani Putri Damayanti, Dwi Kartika Delima br Pakpahan Denny Nurdiansyah Destria Putri, Romadhona Desty, Yola Dewi, Nina Nurmalia Dhalimunte, Sadina Yanti Dhita Dwi Yanti Dian Pratama Dinda Valicia Sipayung Dona Wahyuning Laily Dwi Adinda Dwi Erwin Kusbianto Dyah Ayu Savitri Ebban Bagus Kuntadi Elangga Sony Widiharsono Else Emilia Rumekso Endah Sih Prihatini Erlyne Nadhilah Widyaningrum Erna Hayati, Erna Ersya Kamelia Rosana Fadilah, Ayu Fadillah, Alfiana Nurul Faisol Mas’ud Faisol Masud Faisol Mas’ud Fajar Mubarok, Fajar Fanata, Wahyu Indra Duwi Fandi Saputra Nduru Fatchur Rozci Fatiha, Fifi Fatmi’aturro’isah, Nurul Fauziah, Fithriyatul Feronica, Elisa Fidia Deny Tisna Amijaya Firmawati, Julvia Nurlaeli Fuquh Rahmat Shaleh Garaika Gea, Natalman Gunanti Mahasri Gunsyang, Grassella Gusti, Angger Aisyah Hadiahning Habibi, Muhammad Nizar Habsari, Humairo Dyah Puji Harifin Hasbi Mubarak Suud Hasibuan, Hendrison Adipura Hidayanty, Nurul Ilma Hotmaida Berutu Husna, Kholishotul I Wayan Suastra Ida Syamsu Roidah Imasdiani, Imasdiani Irwanto Sucipto Jessica Amelia Butar Butar Joyanti Sirait Juan Carlos Ginting Juan Vito Juanda Alfario Turnip Juliartha, Made Angga Juliarto, Handy Kurniawan Juni Elfi Br Purba Kanzana, Gebina Karundeng, Franklin Peter Anton Kharisma Adi Bagaskara Khotimah, Triani Husnul Kosasih, Raditya Arya Kurniawan, Bintang Kurniawati, Emy Kusrahman, Nanda Yopan Kustianto, Muhammad Aldian Dwi Lailatus Sufiaah, Annisa Leona, Agis Lia Oktavia Ika Putri Lilis Cahaya Septiana Lioni Tantri Sigiro Lubis, Rifka Ariani Lubis, salsabila Lukitaningsih Lukitaningsih Maharani br Purba Mahmuda , Siti Mangalik, Gerald Manita, Yuni Arroh Manurung, Nadya Khaterina Marpaung, Adrian Marturianus Laia Mas'ud, Faisol Maulana, Andrian Meiriati Simanjuntak Meliala, Susan Barbara Patricia Sembiring Mellfani Rhamadinda Nendra Tigara Memi Nor Hayati Messakh, Gerald Claudio Moch Saad, Moch Saad Moch Saad, S.Pi.,M.Si Moch. Reza Wahyu Abdilah Mohammad Reyfi Syahnaz Anugrah Mohammad Ubaidillah Mohd. Apryanta Sukasa Muhajir, Shafa Al Muham, Setia Esra S. Muhammad Ibnu Adani Muhammad Naufal Syafiq Purba Muhammad Wahdeni Pramana Muhammad Waldano Mukti Ali Munandar, Denna Eriani Muntalim, Muntalim Musmirani, Musmirani Mustajab, Abdullah Azam Nainggolan, Klara Minar Sari Nainggolan, Tiarma Elisabet Najuah, Najuah Nariza Wanti Wulan Sari Nasution, Delila Agustina Nasution, Muhammad Ardiman Nazwa, M. Dirham Nida, Khairun Ningrum, Dewy Maulidya Novita Agresia Manik Novita Paskah Rianti Nugraha, Pratama Yuly Nugraheni, Nazila Nur Azizah, Noviani Nur Gilang Fitriana Nur Salsabilah Harahap Nurkholifah Dwi Rahayu Nurmayanti, Wiwit Pura Nurwahyuni, Atik Octavianto, Thifan Okti, Reski Dwi oya, abas Pakpahan, Ananda Dasiva Pangruruk , Thesya Atarezcha Pangruruk Parawita Dewanti Patricia SM, Susan Barbara Peperawati, Pratiwi Rita Perangin-angin, Desta Riani Br. Piliang, Putri Hasanah Prasojo, Sri Irawan Laras Pratama, Arjun Prihati, Eka Priyono, Bagus Setyo Eko Pusparani, Syafina Puspito, Agung Nugroho Putri Indah Yani Putri, Romadhona Destria Putri, Silfira Elisya Rachman, Fatya Rachmandhika, Yusuf Rafli Edelweis Turnip Raharyani, Anisa Ell Rahayu, Yuliana Fuji Rahman, Ade Aulia Rahmawati, Rahmawati Ramadhanti, Choirul Lisa Ratnasari, Tri Raunaq, Ulya Salisa Regar, Arthur FC Rina Kumalasari Riska Annisyafira Ristiyana, Suci Rito Goejantoro, Rito Rokhani Rokhani romdiyah Romdiyah Romdiyah, Romdiyah Rondhi, M Rony, Zahara Tussoleha Rumahorbo, Ruth Debora Saad, Moch Sabana, Sobi Safitri, Fivie Safitri, Mahardika Salman Aldo Alfaresi Salomo Martines Hutasoit Salsabila, Nur Afifah Sanjaya, Rifqi Ilman Sartika, Dian Sembiring, Santa Hoky Setiani, Fibrinika Tuta Setiyono Setiyono Setyawati, Ari Setyawativ, Ari Shanya Br. Bangun Siagian, Yohana Magdalena Siahaan, Wahyu Renaldi Sibarani, Tesa Romanti Sifriyani, Sifriyani Sihotang, Marnita Simangunsong, Winda Helena Simaremare, Elsa Manora Sinaga, Yosua Solafide Sinambela, Rosi Daniela Sinurat, Gabriel Joey Febriand Siregar, Wishmar Samuel Siringoringo, Meiliyani Sitepu, Maria Maharani Siti Khadijah Siti Khoiriyah SITI MAHMUDAH SM, Indah Chofifah Sony Junianto Sri Mulyani Sri Suryaningsih Stevany Mbu, Margaretha Sultan Ghozi Imaduddin Suparino, Balqis Widyastuti Supriadin, Andi Supriyati, Amanah Surbakti, Adriel Surya Prangga Suud, Hasbi Mubarak Suyitno Suyitno Syafa Nur Azizah Syafina Pusparani Syaripuddin Syaripuddin Tappil Rambe Tarigan, Gema Persada Taufik, Rahadian Falqi Tiara Ni’ammusyfah Pasaribu Tri Ratnasari Tri Wahyu Saputra Tsani, Nada Maulida Ubaidillah, Mohammad Ummi Sholikah Ummi Sholikhah Ustiawan, Arif Veronika Simbolon Vinc Jae Lestari Surbakti Wasono, Wasono Widia, Widia Wijayanto, Yagus Wijayanto Wildan Muhlison, Wildan Wiwit Pura Nurmayanti Woro Hastuti Setyantini Wulandari, Tri Suraning Yagus Wijayanto Yeremia Rivieri Yoandita Velina Aprilia Yuda Sanrico Simanullang Yudiprasetyo, Nehemia Bagas Yuki Novia Nasution, Yuki Novia Yuliana Santa Lore Purba Yuni Arroh Manita Yuniarti, Desi Yusuf Rachmandhika Zahrul Arief Intasar Zai, Diraningsih Zaky Firmansyah Maulana