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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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Studi Pengaruh Stabilisasi Tanah Lempung Lunak Menggunakan Kolom Kapur Terhadap Parameter Kecepatan Penurunan Tanah Arwan Apriyono; Sumiyanto Sumiyanto; Adhe Noor Patria SH
Dinamika Rekayasa Vol 4, No 1 (2008): Dinamika Rekayasa - Februari 2008
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2008.4.1.127

Abstract

Soft clay is kind of problem in building and highway foundation design. This type of soils, have low coefficient consolidation (Cv) parameter. This condition will cause that soils have very long duration in consolidation process. Limes column stabilization method can be applicable to solve this problem.This research be conducted to analyzed coefficient consolidation behavior in limes column stabilization method. The change variety of coefficient consolidation w ill be observe due to variation of limes column diameter. The limes column stabilization method be wished to increase the value of coefficient consolidation so settlement process of the soil get more rapidly. This research was conducted through experimentalin laboratory, with box that have 40 cm in diameters and this height is 40 cm. Five various of diameters applied in this research and this affect to value of Cv would be examined. Those are 3 cm, 5 cm, 8 cm, 10 cm and 12 cm diameters The result of this research show that limes column could increasing the value of coefficient consolidation. The average change of Cv is 0,000051 (6,38 %) compare w i th Cv without limes column stabilization. However, increasing of limes column diameters have no significant affects to the value of coefficient consolidation.
Analisis Dinding Penahan Tanah Dengan Pondasi Tiang Bor (Studi Kasus Tower Pln No. 71 Sutt 150 Kv Di Jalan Gatot Subroto Barat Denpasar) IGNP Dharmayasa; IGIB Eratodi
Dinamika Rekayasa Vol 12, No 2 (2016): Jurnal Ilmiah Dinamika Rekayasa - Agustus 2016
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2016.12.2.151

Abstract

Pemenuhan kebutuhan terhadap listrik sangat tinggi dan memerlukan jaringan yang mampu menjangkau ke seluruh pelanggan. Jaringan untuk mendistribusikan  listrik ke masyarakat sangat kompleks terdiri dari jaringan bawah tanah dan tiang-tiang serta tower. Bangunan tiang-tiang dan tower-tower tersebut sering menimbulkan masalah dalam pengunaan lahan karena memerlukan tempat yang cukup luas. Masalah penggunaaan lahan ini banyak timbul di daerah perkotaan karena semakin sulitnya lahan yang tidak terpakai dan harga lahan yang mahal. Salah satu lokasi yang mengalami permasalahan adalah di daerah Jalan Gatot Subroto Barat, Denpasar. Permasalahan yang terjadi di daerah ini adalah tower milik PLN yaitu tower SUTT 150 kV no.71 menghalangi jalan masuk ke lahan milik warga, sehingga harus melakukan rekayasa dinding penahan tanah dan pondasi dengan memotong sebagian tanah timbunan serta dinding penahan tanah tanpa mengurangi keamanan konstruksi tower SUTT. Untuk mengatasi masalah tersebut direncanakan suatu dinding penahan tanah dari tiang bor (bored pile) untuk mengganti dinding penahan tanah tipe gravitasi yang telah digunakan sebelumya. Sebelum dilakukan perhitungan perlu dilakukan penyelidikan kondisi tanah dasar di lokasi proyek sehingga dapat direncanakan dinding penahan tanah yang sesuai dan memadai. Setelah melakukan penyelidikan tanah di laboratorium dihasilkan nilai sudut geser tanah (ϕ) = 30º dan berat volume (γ) = 1,6 gr/cm3 dan setelah melakukan analisis pada dinding penahan tanah diperoleh nilai momen maksimum (M maks) = 2384,248 kg.m dan gaya geser maksimum (D maks) =  1098,952 kg.  Hasil perhitungan bahan dinding penahan tanah digunakan beton bertulang dinding susunan bored piled diameter 40 cm dengan kedalaman pancang 4,5 m dari tanah eksisting dan tinggi dinding penahan tanah 3,5 m diatas tanah, sehingga dibutuhkan struktur beton bertulang tiang bor (bored piled) panjang 8 m sebanyak 35 buah. Struktur beton bertulang bored piled diameter 40 cm menggunakan tulangan utama longitudinal 6D16 (6 buah besi ulir  dengan diameter 16 mm) dan tulangan geser menggunakan Ø10-250 (besi polos diameter 10 mm dengan jarak 250 mm).  Luas lahan baru yang didapatkan akibat pengurangan eksisting 10,20 x 13,10 m2 menjadi 5,2 x 6,3 m2, di bagian utara (depan) diperoleh  lahan sebesar 5,0 x 11,7 m2 dan jalan akses di bagian timur dari 2,5 m menjadi 3,9 m.
Geomorfologi Sungai Klawing Daerah Bobotsari, Kabupaten Purbalinggga, Jawa Tengah Asmoro Widagdo
Dinamika Rekayasa Vol 8, No 2 (2012): Dinamika Rekayasa - Agustus 2012
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2012.8.2.105

Abstract

Klawing watershed is in Banyumas basin area, Purbalingga, Central Java. The river's flow is cut Tertiary rocks in the mountains of North Serayu, which includes Halang Formation, Kumbang, and Tapak and also Quaternary volcanic rocks of Slamet Volcano. The morphology of the surrounding area of the river is a volcanic mountains of Slamet Volcano in the western, homocline mountainous in the north and the hills / plains in the east and south. Geomorphological processes of Klawing River has formed alluvial deposition and the plain around the river. Alluvial deposits form the terrace around the Klawing River. At least three terrace rivers developed around the study area. The three terrace rivers are each up to elevations of 2.9 m, 22.9 m and 34.9 m from the surface of the Recent river.
Prediksi Penyakit Demam Berdarah Dengue (Dbd) Dan Tifus Menggunakan Jaringan Syaraf Tiruan Perambatan Balik (Back Propagation) Farida Asriani; Hesti Susilawati; Lucyana Harvianti
Dinamika Rekayasa Vol 3, No 1 (2007): Dinamika Rekayasa - Februari 2007
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2007.3.1.122

Abstract

Dengue Haemorrhagic Fever (DHF) and Typhus are diseases which often knock over Indonesian society. Both of these diseases, especially DBD is malignancy that able to result death if losing time to be diagnosed. But civil society, even a doctor which is expert, sometimes also difficult to detect DHF diagnosed earlier, because symptom initially, tending to look like with other acute diseases. One of the diseases that have symptom like DHF is typhus. Back Propagation Artificial Neural Network (ANN) is one of artificial intelligences that can be applicated in the field of health, especially for predicting a disease type. By using input in the form of symptoms the naturalness by a patient, expected this Back Propagation ANN system can help the doctors to diagnose the diseases that happen to their patients, especially DHF and Typhus diseases. ANN system that is designed to predict DHF and typhus diseases, is trained with back propagation algorithm that using adaptive learning rate and momentum. From this research, is got ANN system with network architecture that consist of: one input layer with 18 neurons, one hidden layer with 125 neurons, and one output layer with 1 neuron. And also, value of constanta momentum is 0.95.This ANN system has good performance. From 400 respondents that use for training, result of the memorizing examination reaches percentage equal to 100%, and result of the generalizing examination reaches 96%, from 150 new respondents
Pengaruh Arus Harmonisa Pada Unjuk Kerja Sistem Open-Loop Variable Speed Drive Motor Induksi Menggunkanan Inverter Suroso Suroso; Winasis Winasis; Daru Tri Nugroho; Sebastian Adi Prakoso
Dinamika Rekayasa Vol 12, No 1 (2016): Jurnal Ilmiah Dinamika Rekayasa Februari 2016
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2016.12.1.139

Abstract

One of the  the inverter’s applications is in Variable Speed Drive (VSD) to control the speed of an induction motor by varying  the voltage or the output frequency of the inverter. Induction motor reliability driven by using inverter is often affected by harmonics components of the current and voltage  generated by the inverter. This phenomenon brings harmonic losses in the industry process applying VSD and induction motors, because not all inverters produce a pure sinusoidal wave. Thi paper presents the effect of harmonics on the performance of squirrel cage induction motor type i.e. the speed, torque and efficiency by conducting computer simulation and experimental test in laboratory. The increase in the value of harmonics resulting an increase in the value of speed 1.41%, an increase in the value of torque 1.81 Nm, and decreased of efficiency 1to5%, the harmonics also resulted torque ripple 2 to5 times resulting in unstable speed of motor, arising engine vibration and causing motor heating
THE WORKLOAD ANALYSIS OF EMPLOYEE BY USING NATIONAL AERONAUTICS AND SPACE ADMINISTRATION-TASK LOAD INDEX METHOD (NASA-TLX) Nur Azemil
Dinamika Rekayasa Vol 13, No 2 (2017): Jurnal Ilmiah Dinamika Rekayasa - Agustus 2017
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2017.13.2.181

Abstract

Development of manufacturing and service institutions can not be separated from the role of human resources. Human resources have an important role in fulfilling vision and mission. University of A is one of the private educational institutions in East Java to achieve the goal must be managed properly that can be utilized optimally, this can be done by analyzing workload and performance or optimizing the number of employees. The purpose this research is measure workload and effect the employee’s performance. Measurement of workload is using National Aeronautics and Space Administration-Task Load Index (NASA-TLX) method, NASA-TLX method is rating multidimentional subjective mental workload  that divides the workload based on the average load of 6 dimensions, and the measurement of performance is using questionnaire with 5 scales by likert scale. The results showed that employees who have Medium workload is 8%, High workload is 84% and Very high workload is 8%. The result of the questionnaire showed the category of employee’s performance, simply performance is 24% and satisfactory performance is 76%. From the statistical test by using Chi Square method, it is known that the value = 5,9915 and = 2,2225, the result shows  < , then  is accepted and  is rejected. Thus, there is influence between the workload of employees and the employees’s performance.
Analisis Balok Beton Bertulang Tampang T Yang Diperkuat Dengan Wire Rope Menggunakan Program Response-2000 Dan Metode Pias Anggun Tri Atmajayanti
Dinamika Rekayasa Vol 9, No 1 (2013): Dinamika Rekayasa - Februari 2013
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2013.9.1.100

Abstract

This study aims at finding out the comparison of the results of analysis using Response-2000 and discrete element method and of experiment on T-section reinforced concrete beam strengthened using wire rope. The modeling was made on two T-section beams, where one beam was without strengthening and another beam was with strengthening using two wire ropes of 10mm. Results indicate that the ratios of increase in flexural capacity as results of the analysis using Response-2000 and discrete element method compared to results of the experiment for the control beam were 1.01 and 1.04, respectively, while the ratios of decrease for the strengthened beam were 0.84 and 0.87, respectively. A ductility index for the control beam as result of the analysis using Response- 2000 and discrete element method decreased compared with results of the experiment with ratios of 0.31 and 0.60, respectively. A ductility index for the strengthened beam as result of the analysis using Response-2000 and discrete element method increased compared with results of the experiment with ratios of 1.19 and 1.92, respectively. The ratios of increase in the initial stiffness as result of the analysis using Response-2000 and discrete element method compared with result of the experiment for the control beam were 2.85 and 3.33, respectively, and the ratios of increase in equivalent stiffness as result of the analysis using Response-2000 and discrete element method were 1.62 and 1.42, respectively. The ratios of increase in initial stiffness for the strengthened beam as result of the analysis using Response-2000 and discrete element method compared with result of the experiment were 3.70 and 5.26, respectively, while those for equivalent stiffness were 3.16 and 2.75, respectively.
Simulasi Penerapan Mikrokontroller At89c51 Dalam Proses Penyortiran Balok Kayu Berdasarkan Kriteria Panjang Dan Ketebalan Arief Hendra Saptadi; Vita Nurdinawati
Dinamika Rekayasa Vol 4, No 2 (2008): Dinamika Rekayasa - Agustus 2008
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2008.4.2.116

Abstract

The main problem on sorting out the wood logs in traditional wood industry was that the process should be done manually. Hence, it required an automated system to perform sorting process with a higher precision level. The purpose of this research was to create a simulation of automated wood log sorting process based on specified length and thickness. The sorting system consisted of AT89C51 microcontroller system, keypad (in order to enter the required value of length and thickness), LCD (in order to display the result of sorting process), conveyor belt, two pairs of light sensor (consisting of photodiode and LED, each), and three DC motors which were driven by five relay circuits. At the beginning of sorting process, an operator was to type the selection range (i.e. the minimum and maximum value of required length and thickness) via the keypad provided. The wood log mounted on conveyor belt would be measured by light sensors to determine the value of length and thickness. Based on the values, AT89C51 microcontroller system would then compare them to the selection range. If the log being sorted out fulfilled the requirements, it would be directed to "Accepted" compartment, or else to "Rejected" one. From the test performed, it was concluded that the length measurement was more precise for short logs. While the error rate was much higher for thin logs on thickness measurement. The process of sorting out and counting the wood logs was performed successfully. The system could use the narrowing mechanism at the mounting part of conveyor belt and better supporting ace on thickness sensor, in order to minimize the error rate on length and thickness measurement, respectively. In addition, the system could be developed to measure the volume of an object, providing that the object being measured was having a square or full-circle cross-sectional area.
Studi Analisis Pengenalan Pola Tulisan Tangan Angka Arabic (Indian) menggunakan Metode K- Nearest Neighbors dan Connected Component Labeling Roni Akbar; Eko Adi Sarwoko
Dinamika Rekayasa Vol 12, No 2 (2016): Jurnal Ilmiah Dinamika Rekayasa - Agustus 2016
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2016.12.2.144

Abstract

Handwriting refers to the result of writing by hand (not typed). The writing style of people are not the same. One of the United Nations official languages, Arabic, has a numerical system known as Arabic (Indian) numeral. The identification of feature help humans to be able distinguish the patterns. The grouping patterns can be applied to the machine for recognizing object in the image. Connected component labeling is used for separating characters to be easily recognizable. K- nearest neighbors is used to find the similarity value between query image and template images are based on the nearest neighbors class. This analytical study was tested using 100 test images. The top three classification results of Arabic (Indian) handwritten recognition use k- nearest neighbors  (KNN) are 86% when k = 1, 84% when k = 3, and 83% with k = 5.
Alternatif Pengendalian Banjir Kali Juana Berbasis Model HEC-RAS Teguh Marhendi; Prapdita Nandhi Wardhana; Sigit Nurhadi; Isidorus Bramanti AP
Dinamika Rekayasa Vol 13, No 1 (2017): Jurnal Ilmiah Dinamika Rekayasa - Februari 2017
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2017.13.1.159

Abstract

Kejadian banjir di Kali Juana terjadi setiap musim hujan berlangsung. Beberapa kecamatan seperti Kecamatan Kaliwungu, Undaan dan Mejobo (Kab. Kudus) serta Pati, Margorejo dan Juwana (Kab. Pati) selalu menjadi daerah genangan banjir. Beberapa upaya pengendalian banjir sudah dilakukan seperti upaya normalisasi dan perbaikan tanggul. Namun mengingat kompleksnya sistem aliran banir di Kali Juana, upaya tesebut belum memberikan hasil yang memadai. Kajian ini dimaksudkan untuk menganalisis alternatif pengendalian banjir di Kali Juana menggunakan analisis model HEC-RAS. Analisis dilakukan dengan melakukan simulasi terhadap beberapa bentuk upaya pengendalian, guna mengurangi besaran banjir. Hasil analisis menunjukkan bahwa terdapat 6 model alternatif yang muncul dalam pengendalian banjir Kali Juana. Dari beberapa model tersebut, terpilih model simulasi yang meliputi Normalisasi, Tanggul, Waduk logung, 8 kolam Retensi dan Floodway.

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