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All Journal TEKNIK Journal of Mechanical Engineering Science and Technology Journal of Education Research Indonesian Community Journal
Imam Muhtarom
Universitas Negeri Malang, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Other

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Analysis of Casting Defect, Tensile Strength, and Hardness of Al-Si Casting Alloy with Percentage Variation of Clay Binder Bangkalan Imam Muhtarom; Sunomo Sunomo
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 2, No 2 (2018)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4769.363 KB) | DOI: 10.17977/um016v2i22018p043

Abstract

Casting is one of method that used in forming the work piece by melting specific metal and pouring into moulding that has been prepared. This study aimed to determine the effect of the use of Bangkalan clay as binder in sand moulding against tensile strength, hardness, and defects in Al-Si casting alloy by using gravity casting method. The method used in this study was experimental method then using descriptive analysis. Descriptive analysis included explanation of the test result of tensile strength, hardness, and the type of surface defect of Al-Si casting. Based on the research result obtained the highest shear strength in wet condition obtained on sand moulding which had the highest tensile strength, that was sand moulding with composition of 12% Bangkalan clay, and 0.5% bentonite. While the highest hardness value of Al-Si casting result obtained on specimen with variation of 12% Bangkalan clay with the value of 131.9 HV. Casting defects that appeared on the surface of all casting product variations. The defects that found were fin defects, pinhole defects, sand loss defects, and surface roughness. Based on the result above, could be concluded that variation of 9% Bangkalan clay and 0.5% bentonite as binder was the best variation.
Pine Flower Waste Innovation As A Plant Based Program Augmented Reality Ayik Bela Saputra; Imam Muhtarom; Ni’matul Rochmaniyah; Ardhana Iswari Citra Padmi; Ika Rahmawati
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 2, No 1 (2018)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (200.136 KB) | DOI: 10.17977/um016v2i12018p013

Abstract

Indonesia one of the tropical countries in the world can not be separated from environment problems like other developing countries. One of the causes of declining environment quality is the decline of forests in Indonesia. In 2009, Indonesia’s forest area was   by more than half, to about 88 million hectares. By the year 2013 the number is about 82 million hectares. One of the efforts to promote environment education is to familiarize planting plants to children from an early age from the school environment to the family environment. Therefore it is necessary an alternative in the form of planting media that can be used as a trigger tool of environmental care attitude and can feel the sensation of planting that educative by utilizing pine flower waste as an attractive and environmentally friendly planting medium. Besides as a planting medium is also intended as a instructional media especially elementary school students to high school students. This is because the planting medium has a goal to give an educative impression through information on plant species being planted and to increase awareness of the surrounding environment. If used as a medium of learning this planting media will bring up information about the plant being planted by way of scanning pot characters with gadgets then information about the classification of plants, root shapes, stems, leaves, flowers, how
Analisis Cacat Pengecoran, Kekuatan Tarik, dan Kekerasan Logam Paduan AlSi Hasil Pengecoran Metode Sand Casting dengan Variasi Pengikat Lempung Lokal Bangkalan Imam Muhtarom; Dwi Rahdiyanta
TEKNIK Vol. 44, No. 2 (2023): August 2023
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v44i2.42147

Abstract

This study aims to determine the casting defects, tensile strength, and hardness of the AlSi alloy obtained in the Sand Casting method with Bangkalan local clay as a binder. This experimental research uses the one-shot case study method in which a group of samples is given treatment. Furthermore, the research results were analyzed and described descriptively. This study uses three independent variables and three dependent variables. The independent variable is the local Bangkalan clay binder with varying percentages of 6%, 9%, and 12%, while the dependent variable is casting defects, tensile strength, and metal hardness. The research results show that the lowest casting defects are obtained on the AlSi metal surface, with a variation in the percentage of the binder of 12% with a total of 76 hole defects and 80-grain structure defects. At the same time, the highest tensile strength value is obtained in AlSi metal with a binder variation of 12% with a value of 11.188 kgf/mm². The highest hardness value is also obtained in AlSi metal, with a binder variation of 12% with a value of 131.9 HV. This study concludes that using local Bangkalan clay binder in 12% is the best sand mold binder variation compared to 6% and 9% binder variations.
Kritik Sosial dalam Kumpulan Cerpen Mereka Mengeja Larangan Mengemis: Cerpen Pilihan Kompas Nuraini, Rani; Muhtarom , Imam; Herlina, Dewi
Journal of Education Research Vol. 5 No. 3 (2024)
Publisher : Perkumpulan Pengelola Jurnal PAUD Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37985/jer.v5i3.1553

Abstract

Penelitian bertujuan untuk mendeskripsikan hasil analisis mengenai Kritik sosial dalam kumpulan Cerpen Mereka Mengeja Larangan Mengemis: Cerpen Pilihan Kompas 2019. Penelitian menggunakan pendekatan sosiologi sastra dengan fokus pada teori kritik sosial. Metode yang digunakan adalah metode kualitatif deskriptif analitis. Subjek penelitian ini adalah dua belas cerita pendek dalam kumpulan cerpen Mereka Mengeja Larangan Mengemis: Cerpen Pilihan Kompas 2019, sedangkan objek penelitianya yaitu kritik sosial cerpen mereka mengeja larangan mengemis: Cerpen Pilihan Kompas 2019. Teknik pengumpulan data yang digunakan dalam penelitian ini teknik dokumen. Hasil analisis terhadap kritik sosial dalam dua belas cerita pendek dalam buku kumpulan cerpen Mereka Mengeja Larangan Mengemis: Cerpen Pilihan Kompas 2019 berdasarkan teori Soekanto tahun 2018 yang meliputi atas kemiskinan, kejahatan, disorganisasi keluarga, masalah generasi muda dalam masyarakat modern, peperangan, pelanggaran terhadap norma-norma masyarakat, masalah kependudukan, masalah lingkungan hidup, dan masalah birokrasi.
Membangun Ketahanan Pangan Skala Rumah Tangga di Dusun Jambuwer Desa Balesari Kecamatan Ngajum Yayi Febdia Pradani; Danang Yugo Pratomo; Dian Julianto Wahyudi; Imam Muhtarom; Saifuddin Karim
I-Com: Indonesian Community Journal Vol 4 No 3 (2024): I-Com: Indonesian Community Journal (September 2024)
Publisher : Fakultas Sains Dan Teknologi, Universitas Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/icom.v4i3.5133

Abstract

Di daerah pegunungan, akses terhadap bahan pangan sering kali terbatas dan pengiriman barang menjadi lebih sulit. Kegiatan dilakukan dengan metode ceramah, tanya jawab, dan praktik langsung tentang penanaman sayur skala rumah tangga. Peserta dari kegiatan ini adalah berfokus kepada ibu rumah tangga maupun pemuda dusun yang tidak bekerja namun memiliki halaman rumah yang luas dan cocok untuk bertanam sayur. Pelatihan ini menciptakan efek berkelanjutan yang bermanfaat baik bagi individu maupun komunitas. Tujuan pelatihan ini adalah untuk ketahanan pangan juga mendukung keberlanjutan ekonomi keluarga dan meningkatkan stabilitas finansial peserta. Ketahanan pangan di tingkat rumah tangga juga berkontribusi pada kesehatan masyarakat serta untuk mengolah sendiri bahan pangan dan memilih jenis tanaman yang sesuai dengan kebutuhan gizi keluarga. Selain itu masyarakat dapat memastikan konsumsi makanan yang lebih sehat dan bergizi. Di daerah pegunungan, di mana akses ke fasilitas kesehatan mungkin terbatas, memiliki makanan yang sehat dan bergizi sangat penting untuk mencegah penyakit dan menjaga kesehatan keluarga.
Kritik Sosial dalam Kumpulan Cerpen Mereka Mengeja Larangan Mengemis: Cerpen Pilihan Kompas Nuraini, Rani; Muhtarom , Imam; Herlina, Dewi
Journal of Education Research Vol. 5 No. 3 (2024)
Publisher : Perkumpulan Pengelola Jurnal PAUD Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37985/jer.v5i3.1553

Abstract

Penelitian bertujuan untuk mendeskripsikan hasil analisis mengenai Kritik sosial dalam kumpulan Cerpen Mereka Mengeja Larangan Mengemis: Cerpen Pilihan Kompas 2019. Penelitian menggunakan pendekatan sosiologi sastra dengan fokus pada teori kritik sosial. Metode yang digunakan adalah metode kualitatif deskriptif analitis. Subjek penelitian ini adalah dua belas cerita pendek dalam kumpulan cerpen Mereka Mengeja Larangan Mengemis: Cerpen Pilihan Kompas 2019, sedangkan objek penelitianya yaitu kritik sosial cerpen mereka mengeja larangan mengemis: Cerpen Pilihan Kompas 2019. Teknik pengumpulan data yang digunakan dalam penelitian ini teknik dokumen. Hasil analisis terhadap kritik sosial dalam dua belas cerita pendek dalam buku kumpulan cerpen Mereka Mengeja Larangan Mengemis: Cerpen Pilihan Kompas 2019 berdasarkan teori Soekanto tahun 2018 yang meliputi atas kemiskinan, kejahatan, disorganisasi keluarga, masalah generasi muda dalam masyarakat modern, peperangan, pelanggaran terhadap norma-norma masyarakat, masalah kependudukan, masalah lingkungan hidup, dan masalah birokrasi.
Co-Authors Ardhana Iswari Citra Padmi Ayik Bela Saputra Danang Yugo Pratomo Dewi Herlina, Dewi Dian Julianto Wahyudi Dwi Rahdiyanta Ika Rahmawati Ni’matul Rochmaniyah NURAINI, RANI Saifuddin Karim Sunomo Sunomo Yayi Febdia Pradani