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23,675 Article Results

The Paradox on IT Literacy and Science’s Learning Achievement in Secondary School

https://ijere.iaescore.com/index.php/IJERE/article/view/4450
Dwi Sulisworo
Higher education is currently in the rapid change process. These changes are driven by many factors, both internal and external. Some trends in higher education in the development of one of them is a wider social context. People feel more comfortable with using the internet as a tool in the day-to-day. Information and communication technologies has important role on improving teaching and learning process. The aim of this research is to determine whether the student IT literacy medium influence the learning achievement of good science. This research is a quantitative research using multivariate statistical analysis techniques. The result is that IT literacy has no effect on learning achievement. This phenomenon is the paradox on learning and ICT issues.DOI: http://dx.doi.org/10.11591/ijere.v2i4.2732
Volume: 2
Issue: 4
Page: 149-152
Publish at: 2013-12-01

Analysis and Correction the Inter-channel Mismatch of Synthetic Aperture Radiometer

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2892
Xianxun Yao
A Ka-band two dimensional synthetic aperture interferometric radiometer (SAIR) called SAIR-2D has been developed for concealed weapon detection. The inter-channel mismatch due to amplitude, phase and group delay differences between each receiving channel pairs can result in an undesired effect called fringe washing function (FWF). As the security application usually needs a wide field of view, the FWF is unavoidable and could lead to radiometric performance degradation. This paper presents a general method to analyze the impact of inter-channel mismatch on SAIR. Based on the analysis, the performance degradation of the SAIR-2D is mainly introduced by the group delay difference. To decrease the degradation, a synchronization module is designed to correct the group delay difference. Validation experiments have been conducted on SAIR-2D. The experimental results have validated that the correction technique can meet the requirements of SAIR-2D. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.2890
Volume: 11
Issue: 12
Page: 7190-7196
Publish at: 2013-12-01

Retrieving Atmospheric Precipitable Water Vapor Using Artificial Neural Network Approach

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2890
Wang Xin , Deng Xiaobo , Zhang Shenglan
Discussing of water vapor and its variation is the important issue for synoptic meteorology and meteorology. In physical Atmospheric, the moisture content of the earth atmosphere is one of the most important parameters, it is hard to represent water vapor because of its space-time variation. High-spectral resolution Atmospheric Infrared Sounder (AIRS) data can be used to retrieve the small scale vertical structure of air temperature, which provided a more accurate and good initial field for the numerical forecasting and the large-scale weather analysis. This paper proposes an artificial neural network to retrieve the clear sky atmospheric radiation data from AIRS and comparing with the AIRS Level-2 standard product, and gain a good inversion results. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3749
Volume: 11
Issue: 12
Page: 7174-7181
Publish at: 2013-12-01

Multi-State, Quasi-Experimental Study of the Impact of Internet-Based, On-Demand Professional Learning on Student Performance

https://ijere.iaescore.com/index.php/IJERE/article/view/4454
Steven Shaha , Heather Ellsworth
This multi-State, quasi-experimental study reflects the quantification of comparative gains in math and reading performance on standardized assessments. We contrasted performance in consecutive years pre-versus-post for students of teachers actively participating in an Internet-based, on-demand professional development (PD) program with their respective districts, thus normalizing for uncontrolled educational and socioeconomic variables. A random sample of 169 schools was analyzed representing teachers with a minimum high-participation level in PD.  Results showed that students of participating teachers experienced 18.9% increases (p<.001) in math scores versus 4.2% (p<.01) for their districts, and 15.3% increases (p<.001) in reading versus 2.5% (p<.01) for their districts, equating to statistically significant 4.2 fold (p>.001) and 6.1 (p>.001) fold advantages, respectively. Findings support the high-participation use of Internet-based, on-demand professional learning for improving teacher effectiveness to impact student performance. DOI: http://dx.doi.org/10.11591/ijere.v2i4.3933
Volume: 2
Issue: 4
Page: 175-179
Publish at: 2013-12-01

Automated Sequential Pushing of Micro Objects By Using Adaptive Controller

10.11591/ijra.v2i4.pp163-173
Mohsen Shahini , William W. Melek , John T.W. Yeow
This paper focuses on precision automated pushing of multiple micro objects. An adaptive control system is proposed to accurately push and position the micro objects on a substrate. Each micro object exhibits different characteristics in terms of the surface micro forces governing the manipulation process. The controller is designed to compensate for the effect of the micro forces whose aggregated magnitude varies during the process. An experimental setup is designed to validate the performance of the proposed controller. The results of the experiments confirm that the proposed adaptive controller is capable of learning to adjust its parameters effectively, when the surface micro forces change under varying surface and ambient conditions.
Volume: 2
Issue: 4
Page: 163-173
Publish at: 2013-12-01

Adaptive Fuzzy and Robust H∞ Compensation Control for Uncertain Robot

10.11591/ijra.v2i4.pp174-188
Yuan Chen , Guangying Ma , Shuxia Lin , Jun Gao
In this paper, two types of robust adaptive compensation control schemes for the trajectory tracking control of robot manipulator with uncertain dynamics are proposed. The proposed controllers incorporate the computed-torque control scheme as a nominal portion of the controller; an adaptive fuzzy control algorithm to approximate the structured uncertainties; and a nonlinear H∞ tracking control model as a feedback portion to eliminate the effects of the unstructured uncertainties and approximation errors. The validity of the robust adaptive compensation control schemes is investigated by numerical simulations of a two-link rotary robot manipulator
Volume: 2
Issue: 4
Page: 174-188
Publish at: 2013-12-01

Research On Android Intelligent Phones Controlling the Car to Run

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2925
Jinsong Song , Zhenghua Xin , Wei Ding
The system finished the android smart mobile phone to control the intelligent car to avoid the obstacles wirelessly based on the bluetooth communication protocol. The android system is popular. But researches on applying it in the wireless sensors are very few. This paper allowed the bluetooth-enabled android phones to communicate with sensors wirelessly through our designed software. The software is installed simplely on the phones.The operator can run the software and touch the screen on the intelligent phones to drive the car. When he/she presses the front / the back/the left/the right on the LCD screen of the phones, the car can move forward / backward / the left or / the right. In addition, the gravity sensing of the smart telephone can also control the motion of the car wirelessly in the same way. The car itself can avoid the obstacle intelligently. The ultrasonic sensor can finish the rotation of the 180 degrees to detect the obstacle with the help of the steering gear. And the system also designed the PCB and made the hardware by ourself. The system has advantages of low-cost, convenience and feasibility. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3743
Volume: 11
Issue: 12
Page: 7438-7445
Publish at: 2013-12-01

An Embedded Auto-leveling System based on ARM and FPGA

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2879
Huaiyu Yang , Youping Chen , Bing Chen
A kind of embedded auto-leveling control system based on ARM and FPGA is proposed in this article. According to the mechanical structure and the control requirements of high speed drawing frame, the system combines the precision and high frequency of ARM with the internal logic configuration of FPGA. The control algorithm, hardware structure and software structure are discussed in the paper. This method not only allows for quicker and easier developing work bur also enhances the flexibility of the controller. The experiments validate the feasibility of system and clearly show that the presented approach is effective to reduce the sliver unevenness. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3741
Volume: 11
Issue: 12
Page: 7094-7101
Publish at: 2013-12-01

Implementation and Optimization of A Fast Inter Prediction Algorithm

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2922
Xiaoyu Li
Audio Video coding Standard is the second generation Source Coding-Decoding standards of China, especially for embedded audio/video platform. This paper proposes an efficient and fast inter prediction algorithm, which is one of the key techniques of Audio Video coding Standard.Reducing of the redundancy in source sequence inter prediction, it could improve the picture quality. The optimization schemes include two aspects,which are the algorithm framework, variables and data structure. Optimized results demonstrate that our algorithm has a notable improvement of the clockcycle efficiency. Furthermore, this research also gives a valuable insight of the combination with quantum information. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.2992
Volume: 11
Issue: 12
Page: 7415-7422
Publish at: 2013-12-01

Occupancy Grid Mapping Based on DSmT for Dynamic Environment Perception

10.11591/ijra.v2i4.pp129-139
Junjing Zhou , Duan Jianmin , Yang Guangzu
Occupancy grid mapping is an important approach for intelligent vehicle environment perception. In this paper, an occupancy grid mapping approach in Dezert-Smarandache theory (DSmT) framework for the purpose of dynamic environment perception is proposed. To avoid the transformation of the local map from polar to Catersian coordinate, a different inverse sensor model in Cartesian coordinate for laser scanner was proposed. Two different combination rules in DSmT framework, Dempster’s rule of combination and PCR2, are implemented independently for global map update and mobile object detection. The performance of the two combination rules were compared by ways of simulation and experiment. According to the comparisons we find that both of the combination rules are capable of detecting mobile objects. And the former effectively filtered out the noise and make the detection robust, but the latter didn’t, suggesting that the former is more suitable for occupancy grid mapping. Static and mobile objects are extracted from the occupancy grid map using digital image processing technology.
Volume: 2
Issue: 4
Page: 129-139
Publish at: 2013-12-01

Does Employment Status Affect Breastfeeding?

https://ijere.iaescore.com/index.php/IJERE/article/view/4452
Lina Handayani , Azlina binti Mohd Kosnin , Yeo Kee Jiar
The infant feeding decision is complex and involves the influence of psychological, social, and economic factors, and health care system. For working mothers, there are more obstacles and barrier for practicing breastfeeding successfully. Successful breastfeeding for working mothers is not a simple matter.DOI: http://dx.doi.org/10.11591/ijere.v2i4.3126
Volume: 2
Issue: 4
Page: 157-162
Publish at: 2013-12-01

Intelligent Mobile Olfaction of Swarm Robots

10.11591/ijra.v2i4.pp189-198
Siti Nurmaini , Bambang Tutuko , Aulia Rahman Thoharsin
This work presents intelligent mobile olfaction design and experimental results of intelligent swarm robots to detection a gas/odour source in an indoor environment by using multi agent based on hybrid algorithm. We examine the problem for deciding when, how and where the gas/odour sensor should be activated. Simple form of cooperation between Interval Type-2 Fuzzy Logic and Particle Swarm Optimization (IT2FL-PSO) algorithm is implemented in the olfaction strategies. The real experiments performed on smaller five mobile robots equipped with dynamic gas/odour sensor TGS2600 and three infra-red sensors. The results show that single robot-based olfaction system with 5 behaviors capable for searching source of a simulated chemical leak in unknown environment and flooking behavior can be done by 3 robots to find the source of gas/odour.
Volume: 2
Issue: 4
Page: 189-198
Publish at: 2013-12-01

Simulation of Field Oriented Control in Induction Motor Drive System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2940
Xiang Zhao , Huijuan Liu , Jingxiong Zhang , Haijiao Zhang
In this paper, a 3-phase induction motor model for simulation the field oriented control (FOC) system based on space vector pulse width modulation (SVPWM) is established in Ansoft/Simplorer software. The theory of field oriented control (FOC) and the principle of space vector pulse width modulation (SVPWM) were introduced. The simulation results are presented and analyzed. A Simulink simulation model of field oriented control system is presented as a comparison under the same conditions. The results indicated that the Simplorer model had quick response speed, small torque fluctuations and good performance both in steady and dynamic states. Furthermore, the Simplorer model can be coupled with the finite element model of the motor to achieve field-circuit coupling simulation of induction motor’s field oriented control system. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3674  
Volume: 11
Issue: 12
Page: 7555-7563
Publish at: 2013-12-01

Experimental Study of A Vacuumed Solar Still System

10.11591/ijape.v2.i3.pp99-104
Omar Badran , Nabil Beithou , Aiman Al Alawin , Ahmad Awad , Yaser Abdelhadi , Anwar Al-Mofleh
This experimental study presents a thermal design of a passive solar water distillation system with vacuum. The designed model consists of a glass cover, basin water equipped with reflecting mirror and insulation, and controlled vacuum pump to create vacuum inside the still to decrease the saturation temperature of water and in order to increase the yield. Feed water in the basin is heated by solar energy, and the evaporated water is condensed by inner glass cover. The temperatures at different locations in the system, the received amount of solar radiation, and the distilled water produced were determined. The highest temperature developed inside the distilling device was 51˚ C at ambient temperature of 24˚ C, the daily water production was 1.2 L/m2.day, and the efficiency of the solar still was 15%.
Volume: 2
Issue: 3
Page: 99-104
Publish at: 2013-12-01

Congestion Prediction Algorithm for Network on Chip

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2919
Hua Cai , Yong Yang
Network on chip (NoC) traffic congestion was one of the important reasons for the data transmission performance degradation. In this paper, we presented a congestion judgment algorithm, which was based on neural network. The congestion control algorithm firstly used the hamming network to compute the NoC's link buffer congestion state, secondly used the competitive network to find the worst congestion node, and then adopted avoiding congested node  routing policy to improve the NoC’s transmission performance. In this paper, the congestion control algorithm can make the data stream as far as possible evenly distributed in the NoC’s nodes and links and reduce the transmission resource competition. The simulation results showed that the congestion control algorithm could achieve better network throughput and average transmission delay. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3987
Volume: 11
Issue: 12
Page: 7392-7398
Publish at: 2013-12-01
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