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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.
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Articles 270 Documents
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Peramalan Aliran Masukan Waduk Mrica Menggunakan ModelThomas-Fieringdan Jaringan Syaraf Tiruan ANFIS Imron Rosyadi
Dinamika Rekayasa Vol 7, No 2 (2011): Dinamika Rekayasa - Agustus 2011
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2011.7.2.49

Abstract

Inflow forecasting in hydrology processes is important tool in water resources management,planning, and utilization. The fulfillment of this operational hydrology isvery applicable, especially where onlyan insufficient amount of data collected over an insufficient length of time is available. The Thomas-Fiering Method is one of the most useful and widely used synthetic flow models. In last year’s, ArtificialNeural Network (ANN)method and Fuzzy Logic have introduced in hydrological processes. Mrica hydropower reservoir in Central Java, Indonesia, has suffered water sustainability andenergy sustainability problems since the reservoir management used simple-operator judged waterinflow forecasting method. In this paper, an ANN and Fuzzy Logic hybrid algorithm calledAdaptive Neuro-Fuzzy Inference System(ANFIS) and Thomas-Fiering model are employed to estimate water inflow to the Mrica reservoir. ANFIS performs better for long-range inflow forecasting, while Thomas-Fiering model was better for short-range forecasting.
Analisis Sedimentasi di Pelabuhan Pendaratan Ikan (PPI) Logending Sanidhya Nika Purnomo; Wahyu Widiyanto; Idham Riyando
Dinamika Rekayasa Vol 11, No 1 (2015): Jurnal Ilmiah Dinamika Rekayasa - Februari 2015
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2015.11.1.93

Abstract

Pelabuhan Pendaratan Ikan (PPI) Logending merupakan pelabuhan ikan yang dibangun di muara Sungai Ijo. Karena terletak di muara sungai, PPI tersebut sangat rawan terhadap sedimentasi yang dipengaruhi debit aliran sungai dari bagian hulu dan pasang surut air laut dari bagian hilir. Analisis sedimentasi di PPI Logending didahului dengan pengambilan data primer seperti data kecepatan aliran, sampel sedimen, dan potongan melintang sungai, serta data sekunder berupa data pasang surut di perairan Cilacap yang diperoleh dari BMKG Cilacap. Dengan menggunakan data tersebut, selanjutnya dilakukan analisis sedimentasi menggunakan software HEC-RAS berdasarkan pada Persamaan Ackers – White, Meyer – Peter Müller, dan Wilcock. Hasil dari simulasi menunjukkan bahwa Persamaan Meyer – Peter Müller dan Wilcock memberikan kesesuaian yang lebih baik dengan kondisi di lapangan daripada Persamaan Ackers - White, dimana pada tampang 3 (hulu) terjadi erosi, sedangkan pada tampang 2 (tengah) dan tampang 1 (hilir) mengalami deposisi. Adanya proses deposisi yang signifikan di mulut sungai mengindikasikan perlunya pengerukan untuk pemeliharaan (maintenance dredging) secara periodik yang seharusnya mendapat perhatian dari pihak pengelola pelabuhan.
Analisis Pengaruh Rx Level Terhadap Kecepatan Download Data Pada Teknologi GPRS di PT XL Axiata Tbk. Purwokerto Aldina Peto Bravi; Azis Wisnu Widhi Nugraha; Widhiatmoko Hery Purnomo
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.2011.7.1.40

Abstract

Data transfer speed on GPRS’s technology isaffected by the present of some obstacles between sender’s side and recipient’s side. Those obstacles cause propagation loss that affect the reduction of power level value (rx level). The reduction will affect the data speed. The lower rx level’s value means the lower dataspeed. This researchwas done by doing drive test on BTS North Purwokerto and BTS Tambaksogra to measure the amount of power measured (Pr) andthe download data speed on GPRS’s network. The measuredpower level (Pr) was normalized to get rx level value. Regression analysis was done to get the relation between the download speed and the rx level value. Theanalysis has resulted in a model: download speed = 4.1 (rx level) 0.459 , with R^2 = 0.380. Correlation analysis shows high correlationbetween rx level and download speed (r = 0.608).
Pemanfaatan Citra Satelit Landsat-7 ETM Untuk Prediksi Kerusakan Morfologi Sungai Batanghari Akibat Penambangan Emas Ilegal Teguh Marhendi; Yazirwan Rasyid; Nindyo Cahyo Kresnanto
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.2014.10.2.84

Abstract

Kondisi Sungai Batanghari saat ini telah banyak mengalami deformasi morfologi sungai akibat banyaknya praktek galian C dan penambangan ilagal di sepanjang tubuh sungai.  Deformasi morfologi Sungai Batanghari diprediksi dapat menyebabkan kerusakan pada tubuh sungai Batanghari dan mengakibatkan penurunan potensi sumber daya air.Penelitian ini bertujuan untk mengetahui perubahan morfologi Sungai Batanghari akibat kegiatan penambangan emas ilegal disepanjang sungai dan anak-anak sungainya. Pendekatan penelitian ini menggunakan model “stratified purpose sampling“ melalui teknik penginderaan jauh dengan wahana citra satelit Landsat-7 ETM.Berdasarkan hasil analisis, Sungai Batanghari mengalami perubahan fisik baik menyangkut badan sungai, lingkungan sungai maupun kualitas air. Perubahan badan sungai terkait kegiatan penambangan tanpa Ijin (PETI) terjadi di beberapa lokasi baik pada sungai utama maupun pada anak-anak sungai Batanghari seperti di Dharmasyraya, Bungo, Batanghari dan Solok Selatan.
Pembangkit Listrik Tenaga Surya Dan Penerapannya Untuk Daerah Terpencil Kholid Akhmad
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.2005.1.1.8

Abstract

Solar cell is a device which is capable of converting directly the energy of light to electricity. This device have been implemented in some rural areas of Indonesia as solar home systems of 50 Wp, and PV-diesel hybrid systems. While operation, the solar cell system didn¶ t need fossil fuel, no result pollution and noise to the environment, almost maintenance free, and very easy to operate. The solar radiation is the renewable energy source of solar cell which is abundance and unlimited. However, the solar cell is the promising one as a future energy technology of Indonesia.
Hitungan Diameter Pipa pada Sistem Penyediaan Air Minum sederhana Wahyu Widiyanto
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.2010.6.1.31

Abstract

Drinking water sector is one of the public services which is connected tightly to poverty decrease. A small community water supply is more suitable if it uses a simple system which does not need sophisticated planning and construction. Nevertheless, hydraulics calculation should be always conducted accurately because it will influence water supply performance. In this case, pipe hydraulics needs more overview because system reliability depends on pipe capacity.This study discusses two methods of pipe diameter calculation at a simple drinking water supply system. For planning assistance, Directorate General Cipta Karya-Public Work Ministry issued Technical Guideline Book for Simple Drinking Water Construction in 2007. One of its chapters discusses about a method to find pipe diameter based on several tables available, but it is not given an explanation about basic theory of the tables so there is a doubt for planners. For the reason, comparison between the use of the tables (Juknis Method) and Darcy-Weisbach Formula to calculate pipe diameter will be discussed. Data from 5 villages in Kebumen Regency will be utilized to support analysis.The result of procedure for making comparison shows that there is no significant difference (less than 4%) between the result of calculation by Darcy-Weisbach Formula and Juknis Method with accurate interpolation. Both of the methods can be applied with its advantages and disadvantages. It is suggested that Darcy-Weisbach Formula is always implemented to re-check toward pipe diameter which is available in the market and will be used in the system.
Potensi Sumberdaya Batubara di Daerah Petak Malai, Kabupaten Katingan, Provinsi Kalimantan Tengah Asmoro Widagdo; Adi Candra
Dinamika Rekayasa Vol 9, No 2 (2013): Jurnal Ilmiah Dinamika Rekayasa - Agustus 2013
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2013.9.2.64

Abstract

Administratively, research area ( 9.930 Ha) is located at Petak Malai District, Katingan Regency, Central Kalimantan Province. This research is aimed to know the coal outcrop position, the number of coal seam and to measure of coal resources. The research is done by geological mapping of coal and other lithology at the field. The next phase is correlate some of coal outcrop and make a geological map. The last phase is calculating measured resource and indicated resource of all coal seams.There are ten of coal outcrops in the research area. The ten coal outcrop can be correlate and it becomes three coal seams which have 0.13 m to >0.7 m thick. This coal outcrop is found at Claystone-Sandstone Unit of Dahor Formationwhich lies at central part of the research area. Measured resource of coal resources calculation of research area is 873,050.1 ton. Indicated resource of this research area is 4,524,346 ton.Geological structure formed in the study area is fold and joint. The fold axis is relatively north-south trend. Anticline and syncline fold are the main control of the coal spread.
Pengenalan Pola Aksara Jawa Tulisan Tangan dengan Jaringan Syaraf Tiruan Perambatan-Balik Farida Asriani; Azis Wisnu Widhi Nugraha
Dinamika Rekayasa Vol 5, No 2 (2009): Dinamika Rekayasa - Agustus 2009
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2009.5.2.22

Abstract

Automatic reading techniques of handwriting being developed. Computerization of Java script has started to be developed. However, there is no automated reader system for documents written in handwriting Java script. This research applies backpropagation neural network for recignition of handwritten java script. Preprosesing patterns done with Java script normalize the image size to be 40x40 pixels then feature extraction. Performance network training is 99.8% and performance examination is 95.81%.
Jumlah Transisi pada Ciri Transisi dalam Pengenalan Pola Tulisan Tangan Aksara Jawa Nglegeno dengan Multiclass Support Vector Machines Azis Wisnu Widhi Nugraha; Widhiatmoko Hery Purnomo
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.2012.8.1.55

Abstract

Feature extraction is one of the most improtant step on characters recognition system. Transition features is one from many features used on characters recognition system. This paper report a research on handwritten basic Jawanesse characters recognition system to found the proper numbers of transitions used on transition features. To recognize the characters,the Multiclass Support Vector Machines were used. The Directed Acyclic Graph (DAG) SVM were used for multiclass classification strategy and to map each input vector to a higher dimention space, the Gaussian Radial Basis Function (RBF) kernel with parameter 1were used. It can be shown, for basicJawanesse characters recognition system, the optimal numbers of transitions used for transition features is 4 (a half of maximum numbers of transition on all patterns).
Penggunaan Zeolit Sebagai Media Penyaring Pada Pengolahan Air LimbahDomestik Yanto, Yanto
Dinamika Rekayasa Vol 7, No 2 (2011): Dinamika Rekayasa - Agustus 2011
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2011.7.2.45

Abstract

Sand filter is frequentlyused to treat contaminated water. Channel filter system is a modification of sand filter where the channel is shaped thus the land requirement could be minimized, water is flowed horizontallyfrom intial tank to finaltank through sand filter. Employing the channel filter to treat domestic wastewateris capable of reducing E. Coli up to 98.14%, increasing DO up to 27% and decreasing BOD5 up to 27%. Unfortunately, the final content of E.Coli after treatment process completed is still unacceptable for drinking water. Several options are available to improve the performance of the channel filter system. One of the promising alternativesis modifying the filter medium. Zeolite is natural material that has been utilized to improvewater quality based on several parameters such as Fe, Mn, organic materials, CO and others. Application of zeolite to diminish E. Coli is a challenge. This paper will investigate the effectiveness of zeolite to lower E. Coli contained in domestic wastewater . Zeolite was added to sand filter where thefraction of zeolite is about 5%. Two kind of zeolite-sand combination was implemented that is arranged and mixed zeolite-sand. Wastewater containing E.Coli was then put in the initial tank. Through the hole createdin the tank, wastewater then flowed passing through the combined zeolite-sand filter and accumulated in the final tank. Both E. Coli from initial and final tank was measured to compute treatment efficiency. The result showsE. Coli decreases up to99.99%, BOD5and DO decrease more than 71% and 66% respectively. It can be concluded that 5% addition ofzeolite is able to improve treatment efficiency ofsand filter.

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