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Jurnal Ilmiah Dinamika Rekayasa (DINAREK)
Published by Universitas Jenderal Soedirman
ISSN : 18583075     EISSN : 25276131     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering
DINAREK is a scientific journal published by Engineering Departement of Jenderal Soedirman University. DINAREK is a peer reviewed nasional journal in Indonesian, published two issues per year (February and August). DINAREK is to publish high-quality articles dedicated to all aspects of the latest outstanding developments in the field of engineering. Its scope encompasses the engineering of signal processing, electrical (power), electronics, instrumentation & control, telecommunication, Geological Engineering, Civil Engineering, Computing and informatics, and Industrial Engineering.
Arjuna Subject : -
Articles 270 Documents
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Pengaruh Fire Proofing pada Balok Beton Pasca Bakar Sudibyo, Gathot Heri; Setyo H., Nor Intang
Dinamika Rekayasa Vol 6, No 2 (2010): Dinamika Rekayasa - Agustus 2010
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2010.6.2.37

Abstract

Problem of buildingfire, which is often happened, cannot be avoided. Burning that happened generally reach temperature of above 200oC, what of course influence concrete strength. Concrete material will become brittle, spelling, and barest easyto and its strength is downhill effect of high temperature. In this research the specimens are cylinder shape of concrete and reinforced concrete beams. For this type of concrete cylinder specimens were made with size of 15 cm diameter and 30 cm high, while for the typeof reinforcedconcrete beam specimens were made with size of 15 cm x 20 cm x 150 cm. Each type of specimen for each variety is made of 3 repetitions. Variations in temperature used are normal temperatures, 400o C, 600o C and 800o C.The results of research show that the use of fire proofing provide the value of concrete compressive strength better than the concrete without fire proofing.The fire proofing increased the compressive strength by 2.50%, 5.70% and 11.89% for temperature of 400o C, 600o C and 800o C respectively. While the influence of fire proofing on the flexural strength of reinforced concrete beams at the respective temperatures are 4.99%, 23.97% and 20.55%.
Struktur Geologi Daerah Longsor di Gunung Pawinihan, Kabupaten Banjarnegara, Jawa Tengah Widagdo, Asmoro; Jati, Indra Permana; Waluyo, Gentur; Purwasatriya, Eko Bayu; Suwardi, Suwardi
Dinamika Rekayasa Vol 10, No 2 (2014): Dinamika Rekayasa - Agustus 2014
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2014.10.2.81

Abstract

Fenomena longsor dapat terjadi dengan berbagai faktor pengontrol. Permasalahan yang di kaji dalam penelitian ini terutama adalah untuk mengetahui hubungan struktural antar lapisan batuan di daerah penelitian. Kondisi struktur dapat menjadi pemicu bagi fenomena longsor. Metode penelitian dilakukan dengan pengamatan dan pemetaan lapangan. Pengukuran struktur geologi berupa kedudukan lapisan batuan dan penentuan hubungan stratigrafis antar batuan dilakukan dilapangan. Pengukuran kelerengan topografi dilakukan di peta dan dilapangan. Daerah penelitian tersusun atas batu lempung dengan sisipan pasir karbonatan sebagai batuan yang tua dan juga tersusun atas breksi sebagai yang lebih muda. Batu lempung sebagai batuan yang mudah tererosi baik secara kimia maupun fisika. Erosi aktif pada batulempung memicu pergerakan masa breksi diatasnya. Hadirnya mata air pada kontak lempung-breksi juga memicu terjadinya longsor. Dengan demikian longsor di daerah penelitian dipicu oleh adanya kontak ketidakselarasan antara batuan breksi segar dan lapuk dengan batulempung di bawahnya.
Pengaruh Variasisilica Fumedan Perubahan Faktor Air Semen Terhadap Modulus Elastisitas Beton Setyo H., Nor Intang
Dinamika Rekayasa Vol 1, No 1 (2005): Dinamika Rekayasa - Agustus 2005
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2005.1.1.3

Abstract

The aim of this research is to know influence of addition silica fume and variation of water cement ratio (w/c), also interaction of between both to elasticity modulus of concrete. Independent variable in this research is variation of silica fume and water cement ratio. Dependent variable is compression strength and strain for result of elasticity modulus. The sample test of cylinder concrete with diameter 15 cm and high 30 cm, with the variation of w/c 0,3 ; 0,35 ; 0,4 ; 0,45 ; and 0,5, and also variation of silica fume 0,5%, 10%, 15%, and 20% cement weight. Each treatment made by 10 samples with of volume comparison of mixer concrete 1 : 1,5 : 2,5. The result of samples test carried out 28th days of age obtained optimum rate silica fume 9,328% with w/c 0,35 giving influence to increase of concrete elasticity modulus of concrete to 4,191% of normal concrete
Dinamika Vegetasi Mangrove Holosen Daerah Semarang Berdasarkan bukti Palinologi Setijadi, Rachmad; Suwardi, Suwardi; Suedy, Sri Widodo Agung
Dinamika Rekayasa Vol 6, No 1 (2010): Dinamika Rekayasa - Februari 2010
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2010.6.1.28

Abstract

Palynological evidences (pollen and spores) have been used to study mangrove diversity and vegetation fluctuation at coastal  zone sites at Muktiharja, Kemijen Semarang , province of Central Java. Data was collected in April 2nd to April 17th 2006 following transect method, for sediments sampling used surface subsurface sampling method (depth in 25cm). Pollen preparation used Acetolysis method. The result showed that mangrove forest in the coastal zone of Muktiharja, Kemijen Semarang was dominated by Rhizophoarceae pollen type (included Rhizophora genus : Rhizophora mucronata, Rhizophora stylosa dan Rhizophora apiculata). Vegetation of mangrove forrest in this bay was fluctuated which terrestrial climate was influenced in this mangrove forrest.
Model Pertambangan Emas Rakyat dan Pengelolaan Lingkungan Tambang di Wilayah Desa Paningkaban, Kecamatan Gumelar, Kabupaten Banyumas, Jawa Tengah Aziz, Mochammad
Dinamika Rekayasa Vol 10, No 1 (2014): Dinamika Rekayasa - Februari 2014
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2014.10.1.61

Abstract

Industri pertambangan merupakan industri yang penuh kontroversi. Di satu sisi industri pertambangan mempunyai potensi besar untuk menciptakan kemanfaatan bagi masyarakat dan dapat menciptakan perubahan sosial dan ekonomi. Kondisi wilayah Desa Panikaban telah terindikasikan memiliki potensi sumberdaya mineral logam emas dengan adanya kegiatan dan aktivitas penambangan rakyat yang masih berlangsung hingga saat ini. Penambangan emas di Desa Panikaban terkonsentrasi di daerah Gancang, Kedungalang dan Cihonje, dengan dikelola oleh rakyat yang menggunakan teknologi gelundung. Konsentrasi endapan bijih di daerah ini memiliki tipe endapan urat kuarsa, dengan litologi berupa tuf litik, andesit dan batupasir tufan, termasuk dalam Formasi Halang dan Formasi Tapak. Pola penambangan yang diharapkan menggunakan metoda gali-timbun, dengan sistem tambang bawah tanah. Penataan kawasan areal tambang emas rakyat merupakan salah satu tahap persiapan dalam mewujudkan kawasan Wilayah Pertambangan Rakyat (WPR) di Kabupaten Banyumas, selain perlu dibentuknya peran serta masyarakat dan adanya badan usaha/koperasi sebagai pengelolanya. Peningkatan perolehan emas perlu diterapkan teknologi tepat guna yang siap pakai dengan memperhatikan tingkat kesehatan dan keselamatan kerja, selain tentunya mengurangi bahaya kecelakaan dan pencemaran air raksa terhadap air dan tanah.
Pengaruh Variasi Jumlah Data Pelatihan SVM Terhadap Unjukkerja pada Sistem Pengenalan Pola Tulisan Tangan Aksara Jawa Nglegeno Azis Wisnu Widhi Nugraha
Dinamika Rekayasa Vol 5, No 1 (2009): Dinamika Rekayasa - Februari 2009
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2009.5.1.19

Abstract

Support Vector Machines (SVM) is one of many classification methods implemented on pattern recognition, including handwritten character recognition system. Numbers of traning set will affect the performance of the recognition system. A basic Jawanessehandwritten character recognition system based on SVM used to show the effect of training set numbers variation on system performance. The experiment result indicating that SVM has good generalization on limiting training set (on a data set, 30% data used for training set can give more than 90% success rate on all data set).
Efektivitas Injeksi Larutan Kapur untuk Menurunkan Plastisitas Tanah Lempung sebagai Upaya Mengatasi Kerusakan Jalan Raya Sumiyanto Sumiyanto; Arwan Apriyono
Dinamika Rekayasa Vol 8, No 1 (2012): Dinamika Rekayasa - Februari 2012
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2012.8.1.51

Abstract

Highway built on high plasticity clay will be easily damaged by groundshrinkage flower essence. Stabilization of clayby mixing lime is a repairement method that has been proven quite effective. However, this method is difficult to be applied in existing  road because demolition must be done. Stabilization of clay using lime solution injection is the method proposed toovercome the  problems of expansive clay under the existing highway, therefore demolition is not required. This study was conducted to obtain  effective parameters influencing the distance lime solution injection sites and time required for complete stabilization process. This research was conductedin labotarorium by injection experiments. Test results shows indications of soil plasticity decrease, especially  the value of plasticity index (PI) and liquid limit (LL). PI decreases from 24.74% to 19.5% and LL decrease from 52.32% to 45%. Based on data analysis it appears that the time required for complete lime solution injection (effective time) has not been obtained in  this test. Based on test data, until the day 28 value of soil plasticity index is still low. In this study obtained effective distance influencing the injectionsolution of lime is 100 cm. The distance is still need to be enlarged by increasing the high pressure.
Metode Bioprediksi Perubahan Iklim Menggunakan Fosil Polen Dan Sporapada Kala Pliosen di Daerah Banyumas Setijadi, Rachmad; Widagdo, Asmoro; Suedy, Sri Widodo Agung
Dinamika Rekayasa Vol 7, No 1 (2011): Dinamika Rekayasa - Februari 2011
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2011.7.1.42

Abstract

Pollen and spore fossil of Pliocene sedimentary (Tapak Formation) have been used as a guidance for prediction (bioprediction) of climate change which happened at Pliocene age in Banyumas. Geomorphological and vegetation changes happenin conformity with climate changes. By knowing pollen and shpore fossils, we can know thetype of vegetation whichproduce it. Then pollen and shprore fossils which found widelyon the sedimentary rock is an exact way for tracing of climate change which had happened. The aimof this research is to explore bioprediction method base on polen andsphore data, to know morphological change which happened because of climate change on Plioceneage in Banyumas.This research consist of field and labolatory work. Field work is for taking rock sample andmaking stratigraphic collumn. Labolatory work consist of making plate from the samples using asetolisis methode, identification and clasification of fosils and palynology analisis.The result of the research show that the research areacan be included on the zone ofPodocarpus imbricatusfrom Late Pliocene Age which is shown by presence ofPodocarpus imbricatusandStenochlaenidites papuanus.There has 3 events of climate change that are hot-cold-hot which corelate withtransgresion (relative sea level rise) andregresion (relative sea level drop)
Penilaian Risiko Keselamatan Dan Kesehatan Kerja Dwi Iryaning Handayani; Adi Purwanto
Dinamika Rekayasa Vol 10, No 2 (2014): Jurnal Ilmiah Dinamika Rekayasa - Agustus 2014
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2014.10.2.86

Abstract

Keselamatan dan kesehatan kerja merupakan aspek penting dalam mengendalikan semua risiko yang ada didalam operasional perusahaan sehingga Penerapan (K3) ditempat kerja dapat meminimalkan risiko kecelakaan kerja pada setiap kegiatan proses produksi. Kecelakaan yang terjadi di lingkungan kerja sebagian besar 88% disebabkan karena perilaku yang tidak aman (unsafe action), 10% kondisi lingkungan kerja yang tidak aman (unsafe condition) dan 2% tidak diketaui penyebabnya. Oleh karena itu manajemen perusahaan harus melakukan analisis terhadap manajemen risiko yang diharapkan dapat mengurangi dan melindungi bahkan menghilangkan risiko kecelakaan kerja (zero Accident) pada tenaga kerja dengan melakukan pencegahan pada timbulnya kecelakaan kerja selama melakukan kegiatan proses produksi. Tujuan penelitan ini yaitu melakukan identifikasi potensi bahaya dan melakukan penilaian risiko bahaya yang akan terjadi di PT. X divisi Particle Board di area glue kitchen, forming dan press line. Terdapat 23 kejadian risiko keselamatan dan kesehatan kerja yang sudah di identifikasi. Adapun risiko yang paling banyak terjadi yaitu pada tahapan proses forming dan press process. Tingkat risiko yang paling tinggi yang bisa berpotensi kematian (ektstrem risk) yaitu ketika pekerja melintasi tangga forming dan hot press. Sedangkan tingkat risiko yang paling rendah yaitu ketika pekerja terbentur besi beam, terkena flake yang tajam dan terkena oli panas saat terjadi kebocoran pipa.
Studi Kapasitas Lateral Pondasi Tiang Ujung Bebas Dengan Variasi Diameter Dan Jarak Beban Sampai Muka Tanah Pada Tanah Pasir Di Laboratorium Arwan Apriyono
Dinamika Rekayasa Vol 2, No 1 (2006): Dinamika Rekayasa - Februari 2006
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2006.2.1.10

Abstract

The aim of this research is to study behavior of single free-end pile under lateral loads due to various of diameters and distance load from ground surface in cohesion less soil. The research was conducted through experimental in laboratory. Three various of diameters are: 1cm, 1.25cm and 1.5cm are used, and five various of distance load from ground surface are: 15cm, 17.5cm, 20cm, 22.5cm and 25cm. The value of ultimate lateral capacity (Pu) is determined by using interpretation method and compared to Brom's analysis method. The result of this this research is that value of the lateral capacity will increase with increasing of diameters, but it will decrease while distance load from ground surface increase.

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