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All Journal JIPSINDO (Jurnal Pendidikan Ilmu Pengetahuan Sosial Indonesia) Jurnal Riset Pendidikan Matematika FLYWHEEL : Jurnal Teknik Mesin Untirta JURNAL ENGGANO Jurnal Ilmiah Kebijakan Hukum Jurnal HAM Journals of Ners Community Manutech : Jurnal Teknologi Manufaktur Journal of System and Computer Engineering JTTM: Jurnal Terapan Teknik Mesin Fish Scientiae : Jurnal Ilmu-Ilmu Perikanan dan Kelautan Journal of Applied Agricultural Science and Technology Dulang: Jurnal Pengabdian Kepada Masyarakat Jurnal Indonesia Sosial Teknologi JATIMAS : Jurnal Pertanian dan Pengabdian Masyarakat Jurnal Inovasi Teknologi Terapan MCSIJ (Marine, Coastal and Small Islands Journal) : Jurnal Tugas Akhir Mahasiswa Ilmu Kelautan
Yuliyanto Yuliyanto
Universitas Lambung Mangkurat
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Physics Social Sciences Transportation Other

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Pengaruh Proses Pengeringan dan Campuran Briket Antrasit dengan Biomassa Serbuk Gergaji Kayu Terhadap Kadar Abu dan Volatile Matter Fadhian, Muhammad FIlo; Wahyudie, Illham Ary; Yuliyanto, Yuliyanto
Manutech : Jurnal Teknologi Manufaktur Vol. 17 No. 01 (2025): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v17i01.458

Abstract

The Indonesian government recognizes the importance of transitioning away from dependence on fossil fuels. Briquettes are becoming the most popular option for overcoming fossil fuel dependence. This study examines the effect of the drying process and variation of anthracite mixture with wood sawdust on ash content and volatile matter in briquettes. The study used a factorial method with three process variables: water and molasses fractions, temperature, and holding time. The results showed that the highest ash content was obtained in briquettes with a water and molasses fraction of 1:1, while the lowest ash content was at a fraction of 2:1. The temperature and drying time also affected the ash content, where lower temperature and longer drying time resulted in lower ash content. Regarding volatile matter, briquettes with a drying temperature of 120°C and a drying time of 60 minutes produced the lowest volatile matter content. This study concludes that combining the drying process and the right mix of ingredients can improve the quality of briquettes, although the results obtained have not met the established SNI standards.
Pengaruh Proses Pengeringan dan Penambahan Biomassa Tempurung Kelapa Pada Briket Antrasit Terhadap Kadar Zat Terbang dan Kadar Abu Al Aziz, Putra Habib; Wahyudie, Illham Ary; Yuliyanto, Yuliyanto
Manutech : Jurnal Teknologi Manufaktur Vol. 17 No. 01 (2025): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v17i01.459

Abstract

Indonesia is a country rich in natural resources, particularly coal and coconuts. The purpose of this research is to determine the effect of drying processes and the addition of coconut shell biomass to anthracite briquettes on volatile matter content and ash content. A full factorial method was employed in this study, with three factors: drying temperature, drying time, and water-to-molasses ratio. The results show that the coconut shell biomass added to anthracite briquettes significantly affects the volatile matter content. The lowest volatile matter content, 24.8%, was observed in briquette samples dried at 120? for 90 minutes with a water-to-molasses ratio of 4:3. On the other hand, the highest volatile matter content, 28.1%, was produced by briquette samples dried at 100? for 90 minutes with a water-to-molasses ratio of 4:1. The lowest ash content, 41.1%, was found in briquette samples dried at 120? for 60 minutes with a binder ratio of 4:1, while the highest ash content, 35.8%, was observed in samples dried at 100? for 60 minutes with a binder ratio of 4:3.
Pemanfaatan Serbuk Batang Kayu Puspa Sebagai Pembuatan Papan Partikel Terhadap Pengujian Impak Yuliyanto, Yuliyanto; Novizal, Novizal; Rollastin, Boy
Manutech : Jurnal Teknologi Manufaktur Vol. 17 No. 01 (2025): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v17i01.461

Abstract

In order to satisfy the wants and desires of human life, science and technology have advanced quickly. Science and technology are developing in many facets of life. Technological advancements also happen in composite materials, which are still being studied today. Particleboard is a manufactured board created by pressing industrial waste from plantations, forestry, and agriculture together with organic adhesives. Low-quality wood waste products that may contain cellulose and lignin, such as sawdust, twigs, lathing residue, and others, can be used. The PVAc polymer was subjected to temperatures of 90°C, 100°C, and 110°C in this work, which employed a direct experimental method. The parameters used were mesh 10, 20, and 30 with a volume fraction of 60%: 40%, 70%: 30%, and 80%: 20%. In this study, the results of the largest impact strength were found in the volume fraction of 60%:40% on mesh 30 with heating at 90°C for 15 minutes amounting to 16.34 J/m2, and the smallest impact value was found in the volume fraction of 70%:30% on mesh 10 with heating at 100°C amounting to 9.28 J/m2, where these values do not meet the SNI-03-2105-2006 standard for making particle boards.
Analisis Sifat Mekanik Komposit Tangkai Ilalang Bermatriks Polyester Terhadap Pengujian Lentur Subhan, Muhammad; Pratama, Adi; Yuliyanto, Yuliyanto
Manutech : Jurnal Teknologi Manufaktur Vol. 17 No. 01 (2025): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v17i01.462

Abstract

The use of metal materials in the industrial world is increasingly widespread, so that over time metals are becoming increasingly difficult to obtain and people are required to think critically so they can look for alternative materials from the limitations of metals that are easily available and abundant, one of which is composite materials. Composite is a combination of two or more materials with different ingredients. The aim of this research was to determine the effect of thatch stalk length of 50, 60, 70 mm and a volume fraction of 35% with an oven temperature of 90°C for 45 minutes, 40% with an oven temperature of 100°C for 45 minutes, and 45% with an oven temperature of 110°C for 45 minutes when soaking the thatch stalks in 4% NaOH for 2 hours for the bending test. The highest flexural strength value was at a shank length of 50 mm with a volume fraction of 35% with an oven temperature of 90°C of 48.23 MPa. This is because the shorter the thatch stalks, the denser the thatch stalk composite looks and at a volume fraction of 35% the thatch stalks and resin stick well and the oven temperature should not exceed 90°C because if it exceeds the thatch stalks it will shrink and the flexural strength will increase. small.
Analisis Lapisan Serat Kulit Jagung Kering Dengan Pengaruh NaOH 4% Komposit Matriks Polyester Terhadap Pengujian Tarik dan Bending: Bahasa Indonesia Yus Andi, Zulfan; Yuliyanto, Yuliyanto; Razqi, Fadilla Muhamad
Manutech : Jurnal Teknologi Manufaktur Vol. 17 No. 01 (2025): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v17i01.534

Abstract

This study aims to analyze the effect of dry corn husk fiber layers with a 50% volume fraction on the mechanical properties of composites made using the hand lay-up method and alkali NaOH treatment. The corn husk fibers were treated with 4% NaOH for 1, 2, and 3 hours at temperatures of 80°C, 90°C, and 100°C to produce composites with polyester resin. Tensile and bending tests were conducted according to ASTM D-638 and ASTM D-790 standards. The results showed that NaOH treatment for 3 hours at 90°C produced the highest tensile strength of 21.1 Mpa, while NaOH treatment for 1 hour at 80°C produced the highest bending strength of 53.0 Mpa. On the other hand, NaOH treatment for 2 hours at 80°C resulted in the lowest tensile strength of 5.84 Mpa, and NaOH treatment for 2 hours at 100°C resulted in the lowest bending strength of 8.53 Mpa. Longer treatment durations and higher temperatures effectively remove lignin and hemicellulose, increasing tensile strength but can damage the fiber structure for bending tests. This study demonstrates the potential of corn husk fibers as an environmentally friendly and sustainable composite material.
Study of Sambiloto Andrographis paniculate Ness. Extract as an Eco-Friendly Biocontrol on Weed Seed Germination and Growth Madusari, Sylvia; Marzuki, Slamet; Yuliyanto, Yuliyanto
Journal of Applied Agricultural Science and Technology Vol. 7 No. 4 (2023): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v7i4.93

Abstract

The use of synthetic herbicides causes many problems, including pollution, a decrease in soil organic content, and weed resistance to specific herbicides. Plants provide a source of novel phytotoxic compounds that can be evaluated in the search for efficient and ecologically safe herbicides. This research aimed to examine the allelochemical bioherbicidal activity of sambiloto (Andrographis paniculate Ness) leaf extract (SLE) to suppress weed seed germination and growth. The experiment was designed to investigate the effect of the SLE as a potent weed seed germination inhibitor and retard weed growth. In this experiment, a non-factorial randomized block design was used, with treatments SLE0 (0% Extract), SLE1 (Extract 0.1%), SLE2 (Extract 0.5%), SLE3 (Extract 1.0%), and SLE4 (Extract 1.5%). The result showed that weed height and biomass were significantly reduced after the extract was applied. The plant-based extracts contained 0.1114% flavonoids and 0.1628% tannins. The findings suggest that this sambiloto herbaceous extract has a promising future in modern plant protection as bioherbicide to suppress germination and weed growth. Therefore, the application of these bio-products could be beneficial for sustainable agricultural practices.
STRES MENGHADAPI UJIAN AKHIR SEMESTER DENGAN POLA TIDUR MAHASISWA Umah, Khoiroh; Yuliyanto, Yuliyanto
Journals of Ners Community Vol 5 No 2 (2014)
Publisher : Fakultas Ilmu Kesehatan Universitas Gresik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55129/jnerscommunity.v5i2.96

Abstract

ABSTRAKStres merupakan suatu keadaan yang disebabkan oleh ketidakmampuan individuterhadap tuntutan internal maupun eksternal stimulus yang dapat membahayakanpenyesuaian diri terhadap situasi. Adanya stres dalam menghadapi ujian mengakibatkanperubahan istirahat dan tidur yang berbeda pada setiap mahasiswa. Masih banyakditemukan mahasiswa yang mengalami gangguan pola tidur saat menghadapi ujian seperti:sulit memulai tidur, lingkungan ramai, dan jumlah jam tidur (kurang dari kebutuhan).Namun hubungan stres dalam menghadapi ujian akhir semester dengan pola tidur belumdapat dijelaskan.Desain penelitian ini menggunakan Cross sectional, dengan teknik purposivesampling. Sampel diambil sebanyak 52 responden. Variabel independen adalah stres danvariabel dependen adalah perubahan pola tidur. Data diambil dengan menggunakankuesioner.Hasil uji statistik korelasi spearmans rank didapatkan hasil ρ=0,02 yang berarti adahubungan stres dalam menghadapi ujian akhir semester dengan pola tidur mahasiswa ProdiS1 Keperawatan Universitas Muhammadiyah Surabaya, dengan r= 0,418 yang berartitingkat hubungan cukup.Hasil penelitian ini diharapkan dapat menambah pengetahuan dan penanggulangancara menghadapi stres dengan membuat suatu kebiasaan positif dengan menghindari suatuperubahan yang berlebihan.Kata kunci: Stres Ujian Akhir, Pola tidur, Mahasiswa Program Studi KeperawatanABSTRACTStress was a condition caused by the inability of the individual to the demands ofinternal and external stimulus that can harm the adaptation to the situation. The stress offinal exam caused change sleep pattern and different on each student. There are still manystudents who experience disruption in sleep patterns when facing exams such as: hardstart sleeping, crowded environment, and the number of hours of sleep (less thanrequirement). However, the relationship of stress in dealing with final exams with sleeppatterns can not be explained.This study design used cross sectional, with purposive sampling technique. Sampleswere taken as many as 52 respondents. The independent variable was stress and thedependent variable was the change in sleep patterns. Data colleted using a questionnaire.The results of statistical test spearmans rank correlation result obtained ρ= 0.02,which means that there was a relationship of stress dealing in final exams with sleeppatterns student of Nursing Program Study Muhammadiyah Surabaya, and r= 0.418,which means the level of relationship is Enough.This study is expected to increase the knowledge and control of stress by creating apositive habit to avoid an excessive change.Keywords: Stress of final exam, Sleep patterns, Student of Nursing Program Study
Pengaruh Sifat Mekanik Komposit Serat Sabut Kelapa Bermatrik Polyester Terhadap Pengujian Tarik dan Kelenturan Alvariza Farrel, Delza; Yuliyanto, Yuliyanto; Zulfitriyanto, Zulfitriyanto
Jurnal Indonesia Sosial Teknologi Vol. 3 No. 02 (2022): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1418.399 KB) | DOI: 10.59141/jist.v3i02.360

Abstract

Di era teknologi yang mulai berkembang, penggunaan serat alam sebagai komposit mulai banyak digunakan. Misalnya serat sabut kelapa sebagai material komposit. Material komposit memiliki sifat mekanik yang kuat, tahan korosi, ringan, dan dapat digunakan sebagai material pengganti logam. Karena banyaknya keunggulan serat sabut kelapa dipilih digunakan untuk memperbaiki sifat-sifat suatu bahan. Tujuan penelitian ini adalah untuk mengetahui nilai kekutan tarik dan lentur komposit berpenguat serat sabut kelapa dengan fraksi volume 6% - 15 mm, 8% - 20 mm, 10% - 25 mm, dengan diameter serat 0,5 - 1 mm dan perlakuan alkali (NaOH) selama 2 jam dengan kadar 5%. Pengujian tarik dilakukan dengan menggunakan standar ASTM D638 sedangkan pengujian lentur menggunakan ASTM D790. Pengujian dilakukan dengan metode hand lay-up. Hasil pengujian tarik tertinggi terdapat pada fraksi volume 6% dengan panjang serat 15 mm yaitu sebesar 19,4 Mpa. Nilai rata-rata modulus elastisitas tertinggi dihasilkan dari variasi fraksi volume 6% dengan panjang serat 15 mm yaitu sebesar 3766 Mpa. Nilai Kekuatan lentur tertinggi terdapat pada fraksi volume 6% dengan panjang serat 15 mm yaitu sebesar 70,70 Mpa. Hal ini dikarenakan semakin pendek panjang serat maka lebih mudah untuk ditata pada saat proses pembuatanya, ketika dicampur dengan resin, maka seluruh serat dapat menempel dengan resin secara sempurna, sehingga komposit tidak gampang patah jika diberikan beban pada saat proses pengujian. Berdasarkan standarisasi pengujian tarik, untuk nilai hasil uji tarik dari penelitian ini tidak memenuhi standar. Untuk nilai modulus elastisitas dari penelitian ini sudah memenuhi standar.
Analysis of simulation-based (FEA) strength and durability test modeling of natural fiber reinforced composite materials Rangga Pratama, Rangga Pratama; Boy Rollastin, Boy Rollastin; Yuliyanto, Yuliyanto
JTTM : Jurnal Terapan Teknik Mesin Vol 7 No 1 (2026): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v7i1.1956

Abstract

The need for lightweight, strong, and environmentally friendly materials in the maritime industry has driven research into natural fiber-based composites as an alternative to metal. Composite materials reinforced with coconut fiber, banana stem, and palm fiber were chosen because of their abundant availability and potential mechanical characteristics for structural applications such as boat bodies. This study aims to model and analyze the flexural strength and impact resistance of composites reinforced with three types of natural fibers using a Finite Element Analysis (FEA) simulation method in ANSYS software. The test standards used include ASTM D790 for three-point flexural tests and ASTM D256 for Izod impact tests. Simulations were carried out with variations in fiber volume fractions of 3%, 5%, and 7% to obtain maximum stress, strain, and deformation responses. The results showed that the banana stem fiber composite had the highest flexural strength of 148.09 MPa, while the palm fiber fiber showed the highest impact resistance of 145.26 MPa. Validation against literature data shows a difference in simulation results of only around ±5%, confirming the accuracy of the numerical model in predicting the mechanical behavior of the composite. The conclusions of this study indicate that the FEA-based simulation approach is effective in assessing the performance of natural fiber composites and confirms their potential use as an alternative material to metals for lightweight structural applications in the maritime sector.
Co-Authors Adha, Adha Adi Pratama, Adi Afriadi, Achmad Afriadi, Muhammad Ahmad Gunadi, Ahmad Aiwa, Toto Akbar Rafsanjani, Alfarobbi Al Aziz, Putra Habib Alvariza Farrel, Delza Ambarwati, Indah Widya Amriyeny, Ulya Fajri Anjani, Arrum Puspita Aprilia, Zahra Dhiva Arisha, Andriansyah Oktafiandi Arliansyah, Arul Armin, Andre Hasnuryadi Baharuddin Baharuddin Baharuddin Baharuddin Boy Rollastin, Boy Rollastin Chamro', Wardatul Dafiuddin Salim Dafri, Nastiar Dharta, Yuli Edy Kustiani Eko Noer Kristiyanto, Eko Noer Eko Yudo Eko Yuliarsha Sidhi Ergiantoro, Anugerah Fadhian, Muhammad Filo Fathur Rohman, Fathur Feriadi, Indra Habib Al Aziz, Putra Hakim, Zikrul Harwadi, Harwadi Hasdiansah, Hasdiansah Husman, Husman Ilham Ary Wahyudie Imran, Taufik Jailani Jailani Josi, Ahmad Junaidi Junaidi Kurniawan, Ade Dwi Kusuma, Rian Laily Muharani Lioe, Kon Phin Marzuki, Slamet Masdani, Masdani Muhaimin Muhaimin Muhammad Faisal Amin Muhammad Subhan Muhammad Syahdan muharram, Muhammad Munawirah, Munawirah Mustopa Mustopa Novizal Novizal, Novizal Nugraheni Hadiyanti Nurcahya, Dian Nurcahya Nursalam Nursalam Oktoviandi, Oktoviandi Oktriadi, Yudi Parulian Silalahi Permana Liu, Marcell Candra Pranata, Yogi Pristiansyah, Pristiansyah Ramli Ramli Rangga Pratama, Rangga Pratama Razqi, Fadilla Muhamad Robert Napitupulu Rollastin, Boy Sahibu, Supriadi Saputra, Aprianor Teguh Setiawan, Iwan Dwi Simangunsong, Kristian Jubatner Somawardi Somawardi Subarkah, Imam SUBHAN, MUHAMAD Sugianto Sugianto Sujatmiko Sujatmiko Sukanto Sukanto Suzen, Zaldy Sirwansyah Sylvia Madusari Tony, Frans umah, khoiroh Ventani, Embun Wahyudie, Illham Ary Wibowo, Willy Yus Andi, Zulfan Zaldy Kurniawan Zulfitriyanto, Zulfitriyanto