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All Journal Mechatronics, Electrical Power, and Vehicular Technology Agricore: Jurnal Agribisnis dan Sosial Ekonomi Pertanian Unpad Teknologi Indonesia
Demi Soetraprawata
Technical Implementation Unit for Instrumentation Development Division – LIPI, Kompleks LIPI Gd. 30, Jalan Sangkuriang Bandung, 40135
Computer Science & IT Electrical & Electronics Engineering

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DINAMIKA SOSIAL KAJI TINDAK PEMBANGUNAN SISTEM PERTANIAN BERKELANJUTAN, TERINTEGRASI DAN MANIDIRI ENERGI (STUDI KASUS DI DESA PAMALAYAN, KECAMATAN BAYONGBONG, KABUPATEN GARUT) NUGRAHA, ADI; Soetraprawata, Demi; Heryanto, Mahra Arari
Agricore Vol 2, No 2 (2017)
Publisher : Departemen Sosial Ekonomi Faperta Unpad

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pertanian berkelanjutan dalam tiga dekade terakhir telah menjadi paradigma baru yang memengaruhi arah pembangunan pertanian. Walaupun demikian, praktik-praktik pertanian berkelanjutan memiliki karakter knowledge-intensive dan dinamis sehingga memiliki kecenderungan kegagalan penerapan yang cukup tinggi. Pola program penyuluhan dan diseminasi teknologi pertanian biasanya berdasarkan asumsi linear yang menempatkan petani hanya sebagai ‘pengguna pasif’ teknologi yang dihasilkan oleh para ahli ilmu pertanian. Penelitian ini difokuskan pada analisa interaksi-interaksi antar aktor di dalam program pengembangan pertanian berkelanjutan, terintegrasi dan mandiri energi di Desa Pamalayan, Garut. Penelitian ini merupakan penelitian deskriptif kualitatif yang menekankan pada kedalaman informasi yang digali. Data primer didapatkan dari proses wawancara mendalam, FGD, dan observasi partisipatif. Bentuk dan perilaku organisasi serta kondisi sosial secara mikro ketika program dijalankan dianalisis dengan menggunakan Actor Oriented Approach. Berdasarkan hasil penelusuran lapangan, salah satu kunci penentu keberhasilan adalah perencanaan dan pelaksanaan program yang menitikberatkan pada aspek social, yang dalam prosesnya dilakukan secara informal. Hal ini masih jarang dilakukan oleh pelaku pembangunan di Indonesia. Konsep partisipatif dalam diseminasi suatu program pada pelaksanaannya seringkali hanya bersifat sementara, dan tidak dilaksanakan secara bertahap dan berkelanjutan. Oleh karena itu, metode disseminasi dengan pendekatan informal yang mengusung lokalitas dan tingginya tingkat partisipasi tineliti dapat dijadikan contoh untuk program-program pembangunan pertanian dan pedesaan.
DESIGN OF GROUND WATER QUALITY AND CAPACITY MONITORING SYSTEM FOR ASR INFILTRATION WELL USING WIRELESS Alam, Hilman Syaeful; Munandar, Aris; Soetraprawata, Demi; Turnip, Arjon
Teknologi Indonesia Vol 36, No 2 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v36i2.200

Abstract

Design of a monitoring system for the quality and capacity of water absorption wells type Aquifer Storage and Recovery (ASR) using wireless system has been conducted by monitoring changes in well water surface level, the rate of change of fl ow capacity (fl ow rate) and changes in water quality (turbidity). In order to determine the performance of the system, we conducted several tests by placing a sensor and a receiver by two different distances, i.e. the distance of 1 m (short distance) and the actual condition of 35 m (long distance). The results of the system design consist of a wireless monitoring system hardware and data acquisition system software able to display online and in real time. Based on the test results, the value of the total error due to repeatability and linearity for flow rate sensors, water level and turbidity using short-distance wireless systems, are respectively 2.77%, 1.77% and 3.65%. As for the wireless remote system, they are respectively 1.43%, 1.83% and 2.43%. So, the monitoring system of groundwater quality and capacity for infi ltration well using the wireless system can be applied to the actual distance of 35 m, because the error rate due to the infl uence of the distance between the transmitter and the receiver is relatively small, and even better when compared with the short distance ( 1 m).
NEURAL NETWORK TRAINING USING SEQUENTIAL EXTENDED KALMAN FILTER FOR RELIABLE ROAD FRICTION COEFFICIENT ESTIMATION Soetraprawata, Demi; Turnip, Arjon
Teknologi Indonesia Vol 33, No 2 (2010)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v33i2.26

Abstract

The aim of this study is to estimate the vehicle dynamic parameters concerning with road safety (such as, road tire forces, longitudinal and lateral velocities, angular velocity, rolling radius of wheels, side slip, pitch and roll angle, and road friction coeffi cient which are diffi cult to be measured directly in a standard car) using neural network training on the basis of sequential extended Kalman fi lter (SEKF) and the recursive least squares (RLS). For such estimation, a fourteen degree-of-freedom (DOF) nonlinear full-vehicle dynamics model was developed to provide the simulation requirement. The simulation was performed and compared with CarSim (the interpreter for vehicle dynamics) to verify the model, which confi rms the expected results were all the state variables follow the CarSim response well. The simulation results show that the system performs reliably and fastly in estimating the parameters on different road surfaces during various vehicle manoeuvres.
SEQUENTIAL EXTENDED KALMAN FILTER ON EEG EXTRACTION AND CLASSIFICATION Turnip, Arjon; Soetraprawata, Demi; Hariyadi, -; Kusumandari, Dwi Esti
Teknologi Indonesia Vol 36, No 1 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.051 KB) | DOI: 10.14203/jti.v36i1.195

Abstract

In this paper, a neural networks training based on Sequential Extended Kalman Filtering (SEKF) analysis for extraction and classifi cation of recorded EEG signal is proposed to improved feature extraction, classifi cation accuracy,and communication rate as well. The robustness of the SEKF against background noises has been evaluated by comparing the separation performance indices of the SEKF with well known algorithms (i.e., BPNN, JADE,and SOBI). A statistically signifi cant improvement was achieved with respect to the rates provided by raw data.
DESIGN OF AN ADAPTIVE INTELLIGENT CONTROLLER IN A SEMI-ACTIVE SUSPENSION SYSTEMS Turnip, Arjon; Soetraprawata, Demi; Hariyadi, -; Kusumandari, Dwi Esti
Teknologi Indonesia Vol 36, No 1 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.051 KB) | DOI: 10.14203/jti.v36i1.194

Abstract

In this paper, a semi-active control law consists of two tuneable parameters that are given as the function of the running conditions of the vehicle and an adaptive intelligent controller (AIC) is proposed to obtain the best compromise among confl icting performance indices pertaining to the vehicle suspension system. The proposed AIC method is developed based on the frequency regions. The obtained result indicates that a semi-active suspension system based AIC has a signifi cant potential in improving the ride comfort and the road holding.
Autoregressive Integrated Adaptive Neural Networks Classifier for EEG-P300 Classification Soetraprawata, Demi; Turnip, Arjon
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 4, No 1 (2013)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (494.761 KB) | DOI: 10.14203/j.mev.2013.v4.1-8

Abstract

Brain Computer Interface has a potency to be applied in mechatronics apparatus and vehicles in the future. Compared to the other techniques, EEG is the most preferred for BCI designs. In this paper, a new adaptive neural network classifier of different mental activities from EEG-based P300 signals is proposed. To overcome the over-training that is caused by noisy and non-stationary data, the EEG signals are filtered and extracted using autoregressive models before passed to the adaptive neural networks classifier. To test the improvement in the EEG classification performance with the proposed method, comparative experiments were conducted using Bayesian Linear Discriminant Analysis. The experiment results show that the all subjects achieve a classification accuracy of 100%.
The Performance of EEG-P300 Classification using Backpropagation Neural Networks Turnip, Arjon; Soetraprawata, Demi
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 4, No 2 (2013)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (276.701 KB) | DOI: 10.14203/j.mev.2013.v4.81-88

Abstract

Electroencephalogram (EEG) recordings signal provide an important function of brain-computer communication, but the accuracy of their classification is very limited in unforeseeable signal variations relating to artifacts. In this paper, we propose a classification method entailing time-series EEG-P300 signals using backpropagation neural networks to predict the qualitative properties of a subject’s mental tasks by extracting useful information from the highly multivariate non-invasive recordings of brain activity. To test the improvement in the EEG-P300 classification performance (i.e., classification accuracy and transfer rate) with the proposed method, comparative experiments were conducted using Bayesian Linear Discriminant Analysis (BLDA). Finally, the result of the experiment showed that the average of the classification accuracy was 97% and the maximum improvement of the average transfer rate is 42.4%, indicating the considerable potential of the using of EEG-P300 for the continuous classification of mental tasks.
Co-Authors Adi Nugraha Aris Munandar Arjon Turnip Hariyadi , Hilman Syaeful Alam Kusumandari, Dwi Esti Mahra Arari Heryanto