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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 5 Documents
 1 
Search results for , issue "Vol 10, No 1 (2014): Jurnal Ilmiah Dinamika Rekayasa - Februari 2014" : 5 Documents clear
Pengaruh Struktur Geologi Terhadap Potensi Geodiversitas Di Daerah Sungai Klawing, Kabupaten Purbalingga-Jawa Tengah Widagdo, Asmoro; Brahmantyo, Budi
Dinamika Rekayasa Vol 10, No 1 (2014): Jurnal Ilmiah Dinamika Rekayasa - Februari 2014
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2014.10.1.62

Abstract

The Klawing River is located in Purbalingga Regency, in the central part of Central Java. The headwater of the river is in northern area of Bobotsari and flows to Serayu River as the main river. The Klawing and its tributaries cut Tertiary rocks in the mountains of North Serayu, which includes Kumbang and Tapak Formation, and Quaternary volcanic rocks of Slamet volcano. Morphology around the river is formed of volcanic mountains in the west, the steep hills sloping folds in the north and undulating plains at the east and south. Alluvial plain is produced around the Klawing river. This sediment is form terraces morphology around the main river. The main geological structures that develop in the research area is a bedding plane or the slope of the rock layers. This structure produces a typical potential distribution pattern of primary jasper at the igneous lava as well as the andesite rock mine potential. Homocline hills ranks as an object of geology is also controlled by geological structure. Geological structure of the young rocks in the study area is a horizontal bedding plane. This structure controls the distribution of sediment deposition in the secondary jasper at the terrace steps around the river.
Penyelesaian Permasalahan Penjadwalan Aktivitas Proyek dengan Batasan Sumber Daya Menggunakan Metode Cross Entropy Maria Krisnawati
Dinamika Rekayasa Vol 10, No 1 (2014): Jurnal Ilmiah Dinamika Rekayasa - Februari 2014
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2014.10.1.58

Abstract

Project scheduling is essential to be planned before activities. Standard methods of project scheduling based on precedence constraints scheduling events and the assumption that resources are not unlimited capacity. But in fact the project activity has resource limits. The main objective is to minimize the total duration of the project with precedence constraints and resource constraints for all project activities. Many optimization methods are used to improve the quality of scheduling and speed up the calculation time. This paper proposed the use of Cross Entropy (CE) method to solve resource constraints project scheduling problem, as well as comparing the advantages and disadvantages between the CE methods with Differential Evolution (DE) method. The purpose CE method consist of four critical steps including generating a sample of random solution, calculating the performance according to the specific fitness function, selecting elite sample and finally updating the previous parameters to get a better sample in the next iteration. To speed up the computation time, in this study decrease the number of samples for each iteration in Cross Entropy algorithm. Numerical experiments with several data sets from the Project Scheduling library (PSPLIB) showed that CE can provide the optimal total duration of the project same as the DE with calculation time is faster than DE.
Identifikasi Lapisan Geologi Bawah Permukaan Berdasarkan Data Geomagnetik di Sungai Logawa Banyumas Sukmaji Anom Raharjo; Sehah Sehah; Adi Candra
Dinamika Rekayasa Vol 10, No 1 (2014): Jurnal Ilmiah Dinamika Rekayasa - Februari 2014
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2014.10.1.63

Abstract

Identification of geological resources can be done either using surface mapping and cross sectional stratigraphy measurement or geophysical approximation beneath the earth surface. Geomagnetic exploration related to the existing of gold mineral begins with the total magnetic field intensity measurements at 173 locations was scattered in 109.196970 - 109.207580E and 7.448830 - 7.454110S. Interpretation from processing of data obtained four anomalous object, which is defined as fine-medium sandstone (χ= 0.0015 cgs units), coarse sandstone and compact (χ= 0.0035 cgs units), igneous basalt-andesite old Slamet (χ= 0.0085 cgs units), and the complex bedrock (χ= 0.0145 cgs units). The presence of gold mineralization in the rock throughout geomagnetic surveys used to identification of subsurface geological which is interpreted from the processing data that indicated the presence of gold in association with sedimentary (sandstone) is often referred to as sediment-hosted.
Sifat Mekanika Bambu Petung Laminasi Nor Intang Setyo H.; Iman Satyarno; Djoko Sulistyo; T.A. Prayitno
Dinamika Rekayasa Vol 10, No 1 (2014): Jurnal Ilmiah Dinamika Rekayasa - Februari 2014
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2014.10.1.59

Abstract

Laminated bamboo is a kind of engineered structure to improve mechanical properties of bamboo. It is done in order to meet the need of building materials to the building structure. Laminated bamboo are constructed by gluing a slice bamboo, so it has its advantages can be made in any size and a more uniform mechanical properties of natural bamboo. Mechanical properties is required for structural analysis. Good modeling in structural analysis and numerical properties must be supported by valid mechanical properties. ASTM D143 explains the procedure in getting the mechanical properties of wood . This study refers to ASTM D143 to get laminated bamboo mechanical properties of the material are then arranged in a linear elastic lamina mulitilayer Orthotropic . Proficiency level parameter values for bamboo laminate is Young's Modulus ( E ) , EL = 11 840 MPa ; ER = 511.14 MPa ; ET = 814.39 MPa , Poisson ratio νLR = 0.179 ; νLT = 0.229 ; νRT = 0.231 , and Modulus Slide (G , MPa) GLR = 2.6112 ; GLT = 1.0435 ; GRT = 1.0435.
Tahanan Lateral Bambu Laminasi dengan Konektor Pelat Disisipkan Menggunakan Sambungan Baut I G.L.B. Eratodi; A. Triwiyono; A. Awaludin
Dinamika Rekayasa Vol 10, No 1 (2014): Jurnal Ilmiah Dinamika Rekayasa - Februari 2014
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2014.10.1.60

Abstract

Analisis tahanan lateral beberapa alat sambung telah diusulkan Europen Yield Model (EYM) tahun 1949. Beban leleh berupa nilai tahanan lateral (Z) dapat diprediksi dengan mengetahui nilai geometri sambungan, tegangan leleh dowel dan kuat tumpu dowel. Pengujian tahanan lateral ini dilakukan dalam rangka mengetahui kemampuan sebuah baut dengan model sambungan pelat besi disisipkan pada bambu laminasi. Tahanan lateral sejajar dan tegak lurus arah serat-serat dibutuhkan dalam merencanakan sambungan struktural. Pada uji tahanan lateral ini dibedakan menjadi dua, tahanan lateral tegak lurus serat dan tahanan lateral sejajar serat. Dimensi benda uji tahanan lateral tegak lurus serat adalah 2 buah balok bambu laminasi dengan dimensi 37,5×76×180 mm, dan dimensi tahanan lateral sejajar serat 83×76×200 mm. Hasil penelitian menunjukkan teori Yield Mode dari EYM dapat memprediksi nilai tahanan lateral bambu laminasi. Perbedaan hasil ekperimen sebesar 8,05% lebih tinggi dari teori yield mode pada tahanan lateral tegak lurus serat dan 8,38% pada tahanan lateral sejajar serat. Nilai Poffset 5% sebesar 12,34 kN selip pada 4,82 mm dan kekakuan rata-rata sebesar 3,050 kN/mm pada tahanan lateral tegak lurus serat. Uji tahanan lateral sejajar serat memiliki nilai Poffset 5% rata-rata sebesar 20,3 kN dan kekakuan awal sebesar 6,144 kN/mm pada nilai selip rata-rata 3,99 mm.

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