Articles
Pengembangan Pengujian Crashworthiness dengan Simulasi Numerik Menggunakan Model Impact Transferability
Felix Dionisius;
Jos Istiyanto;
Suliono Suliono;
Yusup Nur Rohmat
Jurnal Teknologi Terapan Vol 3, No 1 (2017): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v3i1.4
Collision test is needed in transportation area in order to anticipate injuries of passangers when the accident occurred. Therefore, this test must be done for achieving standar requirements which is known by crashworthiness. This paper discussed about development of crasworthiness test by using modelling impact transferability by numerical simulation. The goal is to know the error of maximum deformation when given axial dynamic loading between numerical simulation and real experiment. Furthermore, analitic was used to validate duration of stress wave propagation from result of numerical simulation. This simulation used explicit finite element method by using PAM-Crash. The component of this research was impactor and impact of transferability with 80 and 27 kg of mass. The square tube-thin walled structure with holes as crush initator 3 mm of diameter was used as specimen. The result shows maximum deformation and duration of stress propagation error which are 3.90 % and 14.89 %.Â
Mikrofabrikasi Jalur PCB Menggunakan Metode Visible Ligth Maskless Photolitography
Dedi Suwandi;
Badruzzaman Badruzzaman;
Jos Istiyanto
Jurnal Teknologi Terapan Vol 1, No 1 (2015): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v1i1.28
Pada tulisan ini akan dibahas metode modifikasi dari Photolitography yaitu Visible Ligth Maskless Photolitography, perbedaannya menggunakan sinar tampak (visible light) dan tanpa mask (cetakan) selanjutnya diaplikasikan pada fabrikasi jalur listrik PCB (printed circuit board). [DI1]Kelebihan metode adalah mudah, murah tetapi mampu membuat profil rumit dan aman. Cara kerjanya model/ profil dibuat di komputer/ laptop kemudian dipancarkan melalui DLP projector. Pada bagian bawah projector dipasang PCB yang sudah dilapisi Negative Photoresist sehingga terjadi proses exposure. Selanjutnya dilakukan proses developing dan eching sehingga terbentuk profil sesuai desain. Pada jenis projector Infocus IN114A ditemukan parameter terbaik: posisi lensa pemfokus pembesaran 3X berjarak 3 cm dibawah DLP projektor dan 14 cm diatas material uji PCB, menggunakan kombinasi warna hitam (R:0 G:0 B:0) dan biru terang (R=0, G=176, B=240) dengan waktu prebake 2 menit, spin 2.000 rpm, exposure 3 menit, developing 5 menit, Postbake 5 menit dan Eching 5 menit. Profil jalur listrik yang berhasil dibuat diantaranya: garis, huruf, alur listrik, dan bentuk microcontroller. Hasil pengukuran Scanning Electron Microscope (SEM) profil garis terkecil yang dapat dibuat yaitu m132 m dan memiliki kekasaran tepi (deviasi) 6,6 m.
ANALISIS DAMPAK GAYA TUMBUKAN MELALUI PERUBAHAN BENTUK SEGI CRUSH INITIATOR PADA STRUKTUR TAILOR-WELDED BLANK
Felix Dionisius;
I'ah Wasiah;
Jos Istiyanto;
Mohammad Malawat;
Bobi Khoerun
Jurnal Teknologi Terapan Vol 5, No 1 (2019): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v5i1.170
Tailor-welded blank (TWB) structure is one of the vehicle component models used in vehicle parts. In addition, these structures can be used in crashworthiess technology which can reduce injuries during a collision.. The structure of a vehicle that has greater strength can cause passengers to be thrown from the passenger compartment. This paper discusses the effect of faceted holes such as square, hexagonal and octagonal as crush initiator mounted on TWB which results in a maximum impact force (Fmax). The smallest maximum impact force is the criteria achieved from this study. The method used experimental quasi-static loading of the actuator speed of 0.5 mm/s to achieve 9.5 mm of deformation. TWB was made from plate formation with a process of stamping to spot weld. The result showed that the maximum impact force has an increase directly proportional to the addition of the shape of the crush initiator in the amount of 14.633 kN to 18.705 kN. From these results, it can be seen a square hole as best design in obtaining the smallest maximum impact force.
Design Optimization of Crashworthiness in Square Tube as Thin Walled Structure With Variations of Crush Initiator: Stripe-Parallelogram-Trigon
Felix Dionisius;
Jos Istiyanto;
Tito Endramawan;
Andri Andri
Jurnal Teknologi Terapan Vol 4, No 1 (2018): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu
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DOI: 10.31884/jtt.v4i1.102
Crashworthiness is an ability of a vehicle structure in order to reduce injury when occurred in collision. Crashworthiness criteria are peak force (Fmax), specific energy absorption (SEA), and crush force efficiency (CFE). The part of structure of vehicle in crashworthiness is front rail which is generally tube as thin walled structure. The aim was to know the best design in thin walled square tube as specimen by variance of crush initiator which arranged holes 3 mm of diameter in shaping stripe with 4 holes, then added graded holes in parallelogram to trigon. This research used compression experiment method under quasi static loading with 30 mm/minute of actuator velocity. Optimum design was done by using Multi Criteria Decision Making (MCDM) with Simple Additive Weighting (SAW) modelling. This research presents that specimen with trigon of crush initiator is the best design with 0.98 of decision score in which crashworthiness criteria for peak force, specific energy absorption and crush force efficiency are 19193.81 N; 5100.93 J/kg; and 46.44%.
The The differences in Biological, Chemical and Physical Qualities of Well Water In Various Soil Textures in Tegalsari, Banyuwangi
indar aning saputri;
joko waluyo;
mochammad iqbal
Biosfer : Jurnal Biologi dan Pendidikan Biologi Vol 3 No 1 (2018): BIOSFER: Jurnal Biologi dan Pendidikan Biologi
Publisher : Program Studi Pendidikan Biologi, FKIP Unpas,
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DOI: 10.23969/biosfer.v3i1.1545
Water is a natural resource which is needed for his life by all sentient beings is therefore important to know the quality of the water before consumption. The condition and texture of soil can affect the quality of the water. In district of Tegalsari Banyuwangi Regency that has a textured ground clay loam and loam water murky conditions, smelling the salty taste while in other regions the same in the sandy loam textured soil condition the water crystal clear, odorless and not felt. This research was conducted to find out the difference in the quality of biology, chemistry and physics there is ground water well textured clay loam, loam and sandy loam. Water quality test using 3 parameters i.e. biological parameter using the method of the test chemical, MPN includes the measurement of pH, and DO, test of physics include the measurement of TDS and organoleptic color, smell and taste. Research results based on biological and chemical parameters showed that water wells on the land of textured clay loam, loam and sandy loam worthy for consumption, while based on physical parameters (TDS) water well on clay loam textured soil proved to be not worth value consumed with TDS > 500 mg/l. In organoleptik water wells are fit to be consumed is water wells on the land of textured sandy loam because the water is colorless, odorless and tasteless No. The entire research results have been adjusted to PERMENKES RI No. 492/MENKES/PER/IV/2010.
RESPON TANAMAN SAWI (Brasicca juncea L.) TERHADAP PEMBERIAN PUPUK ORGANIK CAIR (POC) KULIT PISANG DAN BONGGOL PISANG
Yusran Ibrahim;
Ramlin Tanaiyo
Agropolitan Vol 5 No 1: Agropolitan Issue July 2018
Publisher : Fakultas Pertanian Universitas Ichsan Gorontalo
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The aimed of this research was to know the effect of giving the liquid organic fertilizer from peel and hump of banana on mustard plant (Brasicca juncea L.) into the mustard crop. The research was conducted in March - April 2016, in Toto Utara Village, Tilongkabila District, Bone Bolango Regency. The study was prepared using randomized block design (RAK), which consisted of three treatments and three replications, so there were 9 (nine) experimental plots using polybag planting media. Different dose on 2 (two) treatments that was without treatment P0 (control), concentration of 100 ml / liter of water banana peel liquid organic fertilizer 20 ml/ plant + banana hump liquid fertilizer 20 ml/ plant (P1), and concentration 100 ml/ liter water banana peel liquid organic fertilizer 40 ml/ liquid organic fertilizer from banana hump 40 ml/plant (P2). Fertilization carried out at the time of mustard plants were 3 HST and 9 HST. Based on the results of research after the analysis statistically showed that treatment with liquid organic fertilizer from banana peel and banana hump did not give a real effect on all observation parameters.
The Impact Of Online Learning During The Covid-19 Pandemic on Physical Education Teachers
Taufik Rahman;
Dyas Andry Prasetyo;
Hendra Mashuri
Halaman Olahraga Nusantara : Jurnal Ilmu Keolahragaan Vol 4, No 2 (2021): Halaman Olahraga Nusantara (Jurnal Ilmu Keolahragaan)
Publisher : Universitas PGRI Palembang
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DOI: 10.31851/hon.v4i2.5638
Pendidikan jasmani merupakan bagian integral dari proses pendidikan yang menuntut untuk belajar melalui aktivitas jasmani. T ia proses belajar melalui aktivitas fisik memerlukan pengawasan yang ketat dari guru pendidikan jasmani. Namun, pandemi Covid-19 memaksa pembelajaran pendidikan jasmani dilakukan dari rumah masing-masing siswa, akibatnya tidak ada pengawasan yang ketat dari guru pendidikan jasmani.Penelitian ini untuk mengetahui dampak pembelajaran penjasorkes pada masa pandemi covid-19 terhadap guru penjas di Kabupaten Sumenep. Jenis penelitiannya adalah survei. Instrumen yang digunakan adalah angket proses pembelajaran online. Objek penelitian ini adalah guru PE di SD dan SMA di Kabupaten Sumenep. Analisis data menggunakan analisis deskriptif kualitatif. Hasil penelitian ini dapat disimpulkan bahwa dampak pembelajaran pada masa pandemi covid-19 adalah guru PE wajib meningkatkan literasi digital karena penyampaian informasi berupa materi pembelajaran disampaikan secara online. Guru PE harus memiliki strategi dan inovasi untuk mengatasi kendala yang dihadapi selama pelaksanaan pembelajaran online. Guru PE harus memilih media yang tepat untuk membuat pembelajaran lebih menarik. Di masa pandemi covid-19, guru PA dituntut untuk lebih terbuka terhadap literasi digital dan lebih kreatif dalam belajar serta memiliki kemampuan inovatif yang tinggi. Besar harapan untuk dapat menemukan solusi sosial, ekonomi, dan teknis pengajaran pendidikan jasmani agar proses pembelajaran dapat terlaksana sesuai dengan tujuan pendidikan pendidikan nasional.
PENINGKATAN KEMAMPUAN BERPIKIR KRITIS MATEMATIS SISWA MELALUI MODEL PEMBELAJARAN BERBASIS MASALAH
Taufik Rahman
Symmetry: Pasundan Journal of Research in Mathematics Learning and Education Vol. 4 No. 2 (2019): Symmetry: Pasundan Journal of Research in Mathematics Learning and Education
Publisher : Mathematics Education Study Program, FKIP, Universitas Pasundan
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DOI: 10.23969/symmetry.v4i2.2085
The ability analyzed in this study is the ability to think critically mathematically. This ability is considered very important as written is the goal of mathematics learning from the Ministry of National Education which states that the development of critical thinking skills is the focus of learning and becomes one of the graduation standards of high school students. It is desirable, high school graduates, have the ability to think logically, analytically, systematically, critically, and creatively, and have the ability to work together. This study aims to determine the improvement of mathematical critical mathematical thinking skills of students in one of the Vocational Schools in Bandung between those who obtain problem-based learning with those who obtain conventional learning. The sample in this study was one Vocational School in Bandung, which was selected by 2 classes, namely the first class obtained problem-based learning and the second class received conventional learning. The method in this study is a quasi experiment. The instrument in this study was a test instrument in the form of a description and consisted of 6 questions. The results of this study are improved mathematical critical thinking skills of students who get problem-based learning better than students who get conventional learning
PENINGKATAN KEMAMPUAN BERPIKIR KREATIF MATEMATIS DAN SELF-CONFIDENCE SISWA SMA MELALUI STRATEGI PEMBELAJARAN THINK, TALK, WRITE (TTW) DENGAN MIND MAPPING
Widia Siti Prayudi;
Taufik Rahman
Symmetry: Pasundan Journal of Research in Mathematics Learning and Education Vol. 6 No. 1 (2021): Symmetry: Pasundan Journal of Research in Mathematics Learning and Education
Publisher : Mathematics Education Study Program, FKIP, Universitas Pasundan
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DOI: 10.23969/symmetry.v6i1.4055
Mathematical creative thinking ability is very important in life and all the problems that exist in it by obtaining, managing and utilizing information. To achieve mathematical creative thinking ability, requires the strong character one of which is self-confidence. However in reality mathematical creative thinking ability and self-confidence of students in Indonesia is still low. One alternative learning to improve mathematical creative thinking ability and self-confidence is the Think, Talk, Write (TTW) with Mind Mapping learning strategy. The purpose of this study are: 1) To find out the increase in mathematical creative thinking abilities of students who obtain TTW strategies with Mind Mapping is higher than students who obtain conventional learning models; 2) To find out the achievement of self-confidence of students who obtain TTW strategies with Mind Mapping is better than students who obtain conventional learning models; 3) To find out whether there is a positive correlation between mathematical creative thinking abilities and self-confidence of students who obtain TTW strategy with Mind Mapping. The method used in this study is a quasi-experimental method with a pretest-posttest control group experimental design. The population of this study was tenth grade students of High School No. 15 Bandung. The sampling technique was purposive sampling, using two classes, namely the control class and the experimental class. Based on the results of data analysis, the following conclusions are obtained: 1) The increase in mathematical creative thinking abilities of students who obtain TTW strategies with Mind Mapping is higher than students who obtain conventional learning models; 2) Self-confidence of students who obtain TTW strategies with Mind Mapping is better than with students who obtain conventional learning models; 3) There is a positive correlation between mathematical creative thinking ability and students' self-confidence who obtained the TTW strategy with Mind Mapping. Keywords: Mathematical Creative Thinking, Self-Confidence, TTW, mind mapping
DISTRIBUSI DAN KARAKTERISTIK HABITAT PERKEMBANGBIAKAN LARVA ANOPHELES DI WILAYAH KERJA PUSKESMAS PIJORKOLING KOTA PADANGSIDEMPUAN TAHUN 2021
Rusdiyah Sudirman;
Imam Bachtiar;
Nayodi Permayasa
Jurnal Education and Development Vol 10 No 2 (2022): Vol. 10 No. 2. 2022
Publisher : Institut Pendidikan Tapanuli Selatan
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DOI: 10.37081/ed.v10i2.3564
Malaria masih merupakan masalah di Indonesia. Provinsi Sumatera Utara adalah salah satu provinsi yang merupakan daerah endemis malaria meskipun beberapa daerah telah mencapai target eliminasi. Untuk mempertahankan capaian eliminasi diperlukan strategi melalui ketersediaan data dasar bionomik vektor nyamuk malaria khususnya habitat perkembangbiakan larva. Penelitian ini bertujuan untuk mengidentifikasi habitat perkembang biakan potensial larva Anopheles, dan distribusinya melalui pemetaan dengan GPS. Pengumpulan data dilakukan dengan mengamati habitat potensial larva Anopheles dan mengamati lingkungan fisik biologinya. Pengamatan larva Anopheles dilakukan dengan metode pencidukan larva. Hasil dari penelitian ini adalah jenis habitat perkembangbiakan larva Anopheles di wilayah kerja puskesmas Pijorkoling adalah sawah, kolam ikan, genangan air, parit dan sungai. Suhu air pada habitat perkembangbiakan berkisar 28 – 34 °C, pH air pada semua habitat perkembang biakan berkisar antara 7.4 – 8.2 dengan kadar garam yaitu 0‰. Sebagian habitat perkembangbiakan larva Anopheles terkena paparan sinar matahari langsung dan sebagian lagi terlindung sinar matahari. Ditemukan vegetasi berupa tanaman dan predator pada beberapa habitat . Karakteristik habitat perkembang biakan yang ditemukan di wilayah kerja puskesmas Pijorkoling adalah potensial untuk tempat perkembang biakan larva Anopheles