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Preheat and PWHT analysis of FCAW A573 grade 70 welds results of HT and NHT materials on hardness and microstructure Karim Al Amin, Mochammad; Zakaria, Abdul Majid; Bachtiar, Bachtiar; Rachman, Arif; Widodo, Eriek Wahyu Restu; Fauzi, Muhammad
Journal of Welding Technology Vol 6, No 1 (2024): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v6i1.5239

Abstract

Material A573 Grade 70 is one type of material used to manufacture pressure vessel shells or walls. The thickness of the shell depends on the required pressure design for production. In a case study on pressure vessel shell manufacturing, a thickness of 36 mm was used near the manhole. Due to the connection between the shell and the manhole, the material A573 Grade 70 in the shell was subjected to heat influence. The shell near the manhole will be connected to the rest of the shell using the same material, A573 Grade 70. Consequently, it was necessary to analyse the heat treatment for this material. The heat treatments used to determine the microstructure and hardness value were Preheat and Post Weld Heat Treatment (PWHT). Both types of heat treatments were employed. The preheat temperatures varied at 120°C, 150°C, and 200°C for each joint undergoing PWHT at 650°C with a holding time of 60 minutes, as well as for joints without PWHT. The microstructure of variations with preheat and PWHT exhibited finer grains compared to variations without PWHT. The highest recorded hardness value among the variations with PWHT was 209.89 HVN in the weld metal for the 150°C preheat variation. The highest recorded hardness value among the variations without PWHT was 235.07 HVN in the weld metal for the 200°C preheat variation
PEMANFAATAN BUAH MANGROVE UNTUK PENINGKATAN PEREKONOMIAN MASYARAKAT DAN KELESTARIAN MANGROVE Puspaningrum, Dian; Suleman, Vikisastro; Mutia, Andi Khairun; Bachtiar, Bachtiar; Djabar, Murni; Moonti, Roy Marthen; Ernikawati, Ernikawati; Ruruh, Alexander; Karim, Rilman; Noe, Najwa Sesilya; Dusa, Riswanto; Olii, Rahmat; Atima, Moh. Zulkarnain; Hasan, Zaenab; Pakaya, Ariyanti; Nuna, Ain Anggraini; Pakelo, Irfandi; Uno, Moh. Erikrianto
Insan Cita : Jurnal Pengabdian Kepada Masyarakat Vol 4, No 1 (2022): Februari 2022 - Insan Cita : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (157.543 KB) | DOI: 10.32662/insancita.v4i1.2104

Abstract

 ABSTRAKPerguruan Tinggi Universitas Gorontalo setiap tahun melaksanakan kegiatan pengabdian kepada masyarakat yang dituangkan dalam berbagai program melalui Lembaga Penelitian Pengembangan dan Pengabdian Masyarakat (LP3M) yang ada ditingkat universitas. Program pengabdian kali ini mencoba untuk membuat suatu inovasi baru untuk dapat memberdayakan masyarakat Desa Langge Kecamatan Anggrek, Kabupaten Gorontalo Utara. Program yang dilaksanakan adalah penyuluhan tentang pentingnya menjaga kelestarian mangrove ditinjau dari perspketif ekologi dan ekonomi, serta pendampingan masyarakat dalam pengolahan buah mangrove menjadi bubuk kopi yang bisa dikonsumsi dan dipasarkan dengan harapan dapat membantu meningkatkan perekonomian masyarakat. Kata kunci : Masyarakat, Pengabdian, Mangrove, Kopi Mangrove ABSTRACTThe University of Gorontalo every year carries out community service activities as outlined in various programs through the Research Institute for Development and Community Service (LP3M) at the university level. This service program tries to create a new innovation to empower the Langge Village community, Anggrek District, North Gorontalo Regency. The program implemented is counseling about the importance of preserving mangroves from an ecological and economic perspective, as well as community assistance in processing mangrove fruit into coffee grounds that can be consumed and marketed in the hope of helping improve the community's economy. Keywords : Community, Dedication, Mangrove, Coffee Mangrove 
TRADITIONAL CULTIVATION TECHNIQUES OF COCOA PLANTS AND THE UTILIZATION TURMERIC EXTRACT BECOME VEGETABLE PESTICIDES FOR MANAGING VASCULAR STREAK DIEBACK (VSD) Munawir, Abdillah; Panggabean, Donwil; Bachtiar, Bachtiar; Muna, Siti Umamah Naili; Rusdiyanto, Edi; Nirmala, Sri Dewi
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 6 No. 4 (2022): DESEMBER
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v6i4.1516

Abstract

The cocoa plant is the main ingredient in the manufacture of chocolate and its de-rivative products. The demand for cocoa derivative products is always high in line with the globalization of food and beverages made from chocolate. Traditional co-coa cultivation techniques are the main priority for farmers and the handling of Vascular Streak dieback (VSD) pests is a top priority for farmers. The purpose of this service is to improve the economy of cocoa farmers in Poli-Polia Village, Poli-Polia District, East Kolaka Regency. The method used is discussion, practice and demonstration material. The results of the shoot grafting technique for cacao seed-lings and the manufacture of organic fertilizers increase the productivity of cocoa plants and the results of turmeric extract can directly deal with VSD diseases that attack cocoa plants. In practice, the method of processing and the efficacy of tur-meric extract is the cause of not developing VSD disease in cocoa plants. On the other hand, cocoa yields can be sold at a high value based on training in harvesting techniques and how to improve the quality of cocoa beans.
Analysis of the Best Neural Network Configuration for Predicting Household Customer Kwh Sales in Banda Aceh City Bachtiar, Bachtiar; Tarmizi, Tarmizi; Adriman, Ramzi
Circuit: Jurnal Ilmiah Pendidikan Teknik Elektro Vol. 8 No. 2 (2024)
Publisher : PTE FTK UIN Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/crc.v8i2.22017

Abstract

Energy consumption (kWh) is critical to the operation of electrical systems. Predictive modeling optimizes energy usage, increasing power system efficiency. This study created an artificial neural network (ANN) architecture to estimate energy consumption (kWh) for home users in Banda Aceh. The ANN topology consisted of 5 input layers, 5-25 hidden layers, and one output layer. This study used two scenarios: first, the ANN topology was trained using the logsig activation function, and then the tansig activation function was used for training. Based on training simulations, the ANN architecture with 5 input layers, 5 hidden layers, and 1 output layer has the lowest Mean Squared Error (MSE) of 0.00035. The next phase involved testing this ANN topology. The next stage is to analyze the ANN architecture with 5 input layers, 5 hidden layers, and 1 output layer using the testing technique. Based on the testing technique, the ANN architecture with 5 input layers, 5 hidden layers, and 1 output layer had a MAPE value of 3.34%.
TECHNOLOGY INTEGRATION IN LEARNING IN THE 21ST CENTURY EFL CLASSROOM IN INDONESIA Bachtiar, Bachtiar; Juhana, Juhana; Zuhairi, Aminudin; Ardiasih, Lidwina Sri; Puspitasari, Maya; Pratiwi, Widya Rizky
BUDIMAS : JURNAL PENGABDIAN MASYARAKAT Vol. 6 No. 1 (2024): BUDIMAS : Jurnal Pengabdian Masyarakat
Publisher : LPPM ITB AAS Indonesia Surakarta

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

Abstract

This paper reports the outcomes of a ‘Community Service’ activity related to the integration of technology in English language teaching in Indonesia in the 21st century. The activity was conducted for junior high school English language teachers in Depok District, Indonesia. It outlines the opportunities and challenges faced by teachers in incorporating technology into their teaching and learning processes. Key themes emerging from the activity, include enhancing English language proficiency, increasing engagement and motivation, developing 21st-century skills, cultural exchange and global awareness, as well as the role of teachers and professional development. However, the effectiveness of technology integration heavily relies on the teachers' proficiency, availability of infrastructure, and pedagogical adaptation. The findings of the activity highlight the importance of comprehensive teacher training programs, improvements in educational infrastructure, and a pedagogical shift towards a curriculum more inclusive of technology. Recommendations include enhancing collaboration among stakeholders to support a technology-enriched learning environment to meet the evolving needs of learners in Indonesia.
Deep Learning Approach in English Language Teaching: Does It Matter a Lot? Bachtiar, Bachtiar; Zuhairi, Aminudin; Maya Puspitasari; Sylvia
BUDIMAS : JURNAL PENGABDIAN MASYARAKAT Vol. 7 No. 2 (2025): BUDIMAS : Jurnal Pengabdian Masyarakat
Publisher : LPPM ITB AAS Indonesia Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/budimas.v7i2.17381

Abstract

This paper reports the outcomes of a ‘Community Service’ activity related to the implementation of the Deep Learning (DL) approach in English language teaching in Indonesia. The activity was conducted for junior high school English language teachers in Bogor regency, Indonesia. It outlines the design, implementation, and evaluation of a structured professional development program aimed at equipping teachers with the knowledge, skills, and reflective capacity needed to adopt Deep Learning within the framework of Indonesia’s Merdeka Belajar curriculum. Drawing on Michael Fullan’s 6Cs framework (i.e., character, citizenship, collaboration, communication, creativity, and critical thinking), the activity emphasized pedagogical transformation that moves beyond traditional content delivery toward student-centered, inquiry-based learning. The program adopted a four-stage model: observation, socialization, training and mentoring, and evaluation. These stages allowed facilitators to map the instructional realities of the participants, co-construct relevant training content, and evaluate the impact through both qualitative and quantitative measures. The results indicated a significant increase in teachers’ awareness of DL principles, improved pedagogical confidence, and willingness to implement more meaningful and contextualized English Language Teaching (EFL) practices. Key themes explored included the coherence between DL and the national Profil Pelajar Pancasila, strategies to overcome implementation challenges, and the integration of AI tools to enhance 21st-century competencies. The findings suggest that DL offers a transformative avenue for revitalizing ELT in Indonesia by aligning global educational innovations with local policy goals. This paper recommends sustained investment in teacher training, digital infrastructure, and curricular alignment to ensure scalable and equitable adoption of DL nationwide.
Reposisi Hukum Kelembagaan BNPP dalam Tata Kelola Pembangunan Wilayah Perbatasan Wicaksono, Filipus Wahyu Wicakson; Isnaeni, Belly; Bachtiar, Bachtiar
Jurnal Ilmu Hukum, Humaniora dan Politik Vol. 6 No. 1 (2025): (JIHHP) Jurnal Ilmu Hukum, Humaniora dan Politik
Publisher : Dinasti Review Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/jihhp.v6i1.6369

Abstract

Kelembagaan Badan Nasional Pengelola Perbatasan (BNPP) sebagai institusi koordinatif pembangunan wilayah perbatasan Indonesia menghadapi berbagai persoalan normatif dan struktural yang menghambat efektivitas kerjanya. Permasalahan utama terletak pada status subordinatif BNPP di bawah Kementerian Dalam Negeri yang melemahkan posisi kelembagaan, ditambah dengan defisit kewenangan regulatif dan absennya kerangka hukum yang mengikat kementerian teknis. Penelitian ini bertujuan untuk mengkaji ulang konstruksi hukum BNPP dalam arsitektur kelembagaan pembangunan nasional dengan menekankan pentingnya reposisi yuridis kelembagaan guna memperkuat fungsi koordinatif dan akuntabilitasnya. Pendekatan yang digunakan adalah yuridis-normatif dengan metode analisis deskriptif-kualitatif dan didukung oleh studi perundang-undangan, dokumen kebijakan, serta literatur akademik terakreditasi. Hasil analisis menunjukkan bahwa ketiadaan otoritas hukum yang kuat menyebabkan fragmentasi kebijakan antar kementerian, ketimpangan relasi pusat-daerah, serta rendahnya partisipasi subnasional dalam perencanaan pembangunan perbatasan. Evaluasi kebijakan pun belum terintegrasi dalam siklus kebijakan BNPP, sehingga keberhasilan hanya diukur dari output fisik tanpa memperhatikan dampak sosial dan geopolitik. Penelitian ini merekomendasikan perlunya pembentukan Undang-Undang Pengelolaan Perbatasan yang memberikan kewenangan regulatif kepada BNPP, reposisi kelembagaan agar lebih otonom, penguatan mekanisme evaluasi berbasis data spasial dan sosial, serta peningkatan partisipasi daerah dalam proses pengambilan keputusan. Reposisi hukum kelembagaan BNPP bukan sekadar kebutuhan administratif, melainkan agenda strategis untuk mewujudkan tata kelola perbatasan yang adil, integratif, dan konstitusional.
Survei Evaluasi Diri Guru dan Tingkat Kesiapan Mengajar di MTs Nurul Hasanah Jaya, Jaya; Bachtiar, Bachtiar; Nugraheni, Wening
utile: Jurnal Kependidikan Vol. 11 No. 2 (2025): utile: Jurnal Kependidikan
Publisher : FKIP Universitas Muhammadiyah Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37150/zp6vse89

Abstract

Guru merupakan komponen utama dalam dunia pendidikan yang berperan langsung dalam menentukan keberhasilan proses belajar mengajar. Kemampuan guru sangat penting dalam kegiatan pembelajaran berlangsung secara efektif dan berkelanjutan. Penelitian ini bertujuan untuk mendeskripsikan tingkat evaluasi diri dan kesiapan mengajar guru di MTs Nurul Hasanah. Metode penelitian yang digunakan adalah kuantitatif deskriptif dengan pendekatan survei. Jumlah responden dalam penelitian ini adalah 28 guru yang diambil secara total sampling. Instrumen yang digunakan berupa angket skala Likert, masing-masing terdiri dari 30 item untuk evaluasi diri dan 33 item untuk kesiapan mengajar. Hasil penelitian menunjukkan bahwa tingkat evaluasi diri guru berada pada kategori “Tinggi” dengan nilai rata-rata sebesar 117,39 dari skor maksimal 150, sedangkan tingkat kesiapan mengajar guru juga tergolong “Tinggi” dengan nilai rata-rata sebesar 101,25 dari skor maksimal 132. Temuan ini mengindikasikan bahwa MTs Nurul Hasanah telah memiliki kultur profesional yang mendukung pengembangan kualitas guru secara berkelanjutan.
Co-Authors Aa Juhanda Abda Abda admin admin, admin Adriman, Ramzi Ahmad Alwi Nurudin Al-Majid, Faisal Setiawan Anggraeni, RR Dewi Anhar, Bani Aqilah, Jihan Ardiasih, Lidwina Sri Arief Rachmawan, Arief Arif Rachman Ashariana, Ashariana Atima, Moh. Zulkarnain Aulia, Salsa Najwa Azzahara, Gia Arya Baenuri, Dzulkipli Bambang Santoso Bambang Wiyono, Bambang barakat, nurjamilah Bastianon, Bastianon Belvana, Salsabila Chaerunnisa, Alifia Chrisputranto, Matheus Raditya Christina, Veronica D, Nabilah Hana’a Darsikin Darsikin Defruzer, Defruzer Dika Anggara Diki Hermawan, Diki Djabar, Murni Dusa, Riswanto Eriek Wahyu Restu Widodo Erik Erik, Erik Erlambang Budi Darmanto ernikawati, ernikawati Faizat, Faizat Firman Maulana, Firman Firman Septiadi Gueci, Rizal S Gunawan Gunawan H, Syahril Hadi Sutopo Hakim, Firman Nur Handayani, Fice Hasan, Zaenab hasran, Hasran HS, Christnatalis Hussien, M. Rabiddin Ilham Khoirul Ibad ilham, rio Imanuddin, Iman Irasuti, Irasuti Ismitasari, Elisa Isnaeni, Beli Isnaeni, Belly Jaya Jaya Juhana, Juhana Juliani, Evy Hanisa Karim Al Amin, Mochammad Karim, Rilman Khoirul Rahmat, Imam Khomariah, Nur Kurnia Syamba, Rangga Dharma Ma'ruf, Buana Mauritz Simanjuntak, Mauritz Maya Puspitasari Maya Puspitasari, Maya Miftachul Munir, Moh Mochammad Karim Al Amin Moh. Syaiful Amri Moonti, Roy Marthen Muhammad Saleh Mujiono Mujiono Muna, Siti Umamah Naili Mustaghfirin, Muhammad Anis Mutia, Andi Khairun N. Laratu, Wahyuni Nadila, Nadila Nisazarifa, Adristi Noe, Najwa Sesilya Nova Susanti Novianto, Robertus Ary Nuddin, Nuddin Nuna, Ain Anggraini Nuraeni, Hilda Olii, Rahmat Pakaya, Ariyanti Pakelo, Irfandi Panggabean, Donwil Patmawati Patmawati, Patmawati Prastiwi, Dian Eka Pratama Putra, Mochammad Yudha Aditya Pratama, Fathir Bayu Pratama, Panduma Putra Priyambodo Nur Ardi Nugroho Puadi, Puadi Puspaningrum, Dian Putera, Erwien Yuliansyah R. Ait Novatiani Rahman Rahman Rahmawati, Nadila Ramkar, Rahma Sakura Raya, Loisa Diana Riau, Dwi Putranto RICO, MUHAMMAD Rizky, Raninda Anjania Rony, Rony Rosmini Rosmini Rossi, Roberto RR. Ella Evrita Hestiandari Ruminda Ruminda Ruruh, Alexander Rusdiyanto, Edi Sahlania, Onno Sakti, Supian Sarumpet, Tetty Lasniroha Setiawan, Tato Sipayung, Mardin Siti Mawaddah, Siti Soelistijono, Rafi Febian Soewita, Samuel Sri Ardiasih, Lidwina Sri Dewi Nirmala Sriwati Sriwati Suharto Suharto Suleman, Vikisastro Susanto Susanto Susanto Susanto Syamsudin, Muhamad Syamsuri, M. Abiyarhab Syauri, Muhammad Sofian Sylvia Sylvia Tamara, Heni Aulia Tarmizi Tarmizi Udi Samanhudi Uno, Moh. Erikrianto Victoria, Jaka Wahdah Wahdah Wahyono Wahyono Wahyono, Dhoni Presti Wening Nugraheni Wicaksono, Filipus Wahyu Wicaksono, Filipus Wahyu Wicakson Widya Rizky Pratiwi, Widya Rizky Widyastuti, Dwi Wijaya, Aida Yulianah, Yola Yulianingsih, Ika Zakaria, Abdul Majid Zuhairi, Aminudin