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28,593 Article Results

Student and Teacher Factors as Predictors of Statistics Achievement in Federal School of Statistics Ibadan

10.11591/ijere.v6i1.6346
Abel Adekanmi Adetona
The study aimed at assessing how students and teachers factor taken together influence students’ achievement in Statistics as well as their relative contribution to the prediction. Two research questions were raised and purposive sampling was adopted to select national diploma year 2 students since they are already in their final level in the school. Intact number of lecturers of Statistics department and year 2 Statistics students were used for the study. Students Questionnaire (SQ), Teaching Staff Scale (TSS), and Statistics Achievement Test (SAT) were used for data collection and analyzed using descriptive and multiple regression. The results showed that the 6 variables taken together had significant contribution to students’ achievement in Statistics and accounted for 80.82% of the variation in students’ achievement in Statistics. It was recommended that stakeholders in provision of Statistics education at the monotechnic institutions level must consider the four variables that contributed significantly to achievement seriously during planning for the Statistics education programmes for optimum achievement of students in Statistics.
Volume: 6
Issue: 1
Page: 45-53
Publish at: 2017-03-01

Robotic Arm Movement Optimization Using Soft Computing

10.11591/ijra.v6i1.pp1-14
Surender Kumar , Kavita Rani , V. K. Banga
Robots are commonly used in industries due to their versatility and efficiency. Most of them operating in that stage of the manufacturing process where the maximum of robot arm movement is utilized. Therefore, the robots arm movement optimization by using several techniques is a main focus for many researchers as well as manufacturer. The robot arm optimization is This paper proposes an approach to optimal control for movement and trajectory planning of a various degree of freedom in robot using soft computing techniques. Also evaluated and show comparative analysis of various degree of freedom in robotic arm to compensate the uncertainties like movement, friction and settling time in robotic arm movement. Before optimization, requires to understand the robot's arm movement i.e. its kinematics behavior. With the help of genetic algorithms and the model joints, the robotic arm movement is optimized. The results of robotic arm movement is optimal at all possible input values, reaches the target position within the simulation time.
Volume: 6
Issue: 1
Page: 1-14
Publish at: 2017-03-01

“Nearest Zero-point” Algorithm for Cooperative Robotic Search Missions

10.11591/ijra.v6i1.pp49-58
Vahid Aryai , Mahsa Kharazi , Farid Ariai
Four path planning and data exchange algorithms for cooperative search and coverage robotic missions are proposed and modified. The introduced methods are simulated using C++ programming environment and the results are discussed in detail for environments with static obstacles. It has been shown that using the “nearest zero-point” algorithm can greatly optimize the mission duration and also overlapping of the search trajectories. Finally, the results are compared with several existing algorithms.
Volume: 6
Issue: 1
Page: 49-58
Publish at: 2017-03-01

Automatic Skyscraper Window Cleaning System

10.11591/ijra.v6i1.pp15-20
Kavya S , Karthik M.S. , Arun Kumar C
Automatic Skyscraper Window Cleaning System (ASWCS) aims at providing a risk free and more automated solution for the problem of cleaning glass windowed high rise buildings. It consists of a rollers-based moving platform suspended by a motorized pulley from the top of the building. The cleaning is done with the help of a motor driven cleaning roller brush and water spraying system provided in the platform. The rail system provided on the parapet wall of the building aids in the motorized horizontal movement of the cleaning platform. The entire operation is controlled by a TI MSP430 microcontroller. Once the dimensions of the building are input, the proposed system achieves cleaning with less human intervention. Hence the ASWCS provides an easy, efficient and safe solution for maintenance of skyscraper windows.
Volume: 6
Issue: 1
Page: 15-20
Publish at: 2017-03-01

Science Learning Cycle Method to Enhance the Conceptual Understanding and the Learning Independence on Physics Learning

10.11591/ijere.v6i1.6348
Dwi Sulisworo , Novitasari Sutadi
The aim of this study is to observe the application of SLC (science learning cycle) model on improving scientific literacy for secondary vocational schools at physics. Through this research, it will be known its influence of learning methods and contribution to the understanding of physics concepts and student independence learning. This research is a quasi-experimental design with pretest and posttest control group which the independent variable is learning the method and the dependent variable is the conceptual understanding. The result shows that there is an effect of teaching method on the dependent variable. It also shows that the conceptual understanding of the students in the treatment group who applied methods SLC is better than the control group.
Volume: 6
Issue: 1
Page: 64-70
Publish at: 2017-03-01

Higher-order Mode Rectangular Dielectric Resonator Antenna for 5G Applications

10.11591/ijeecs.v5.i3.pp584-592
Nor Hidayu Shahadan , Muhammad Ramlee Kamarudin , Mohd Haizal Jamaluddin , Yoshihide Yamada
The excitation of the higher-order mode, in rectangular dielectric resonator designed was explored to enhance the antenna gain and detailed elaboration is presented in this paper. The antenna was fed by a 50Ω microstrip line through an aperture cut in the ground plane. Besides avoiding spurious radiation, this feeding technique gives flexibility in controlling the amount of coupling in order to reduce the Q-factor in the higher-order mode RDRA. A design was developed and subsequently simulated using Ansoft HFSS ver 16.0 by utilizing Duroid 5880 dielectric substrate with a thickness (ts) of 0.254 mm, a permittivity (εs) of 2.2 and a loss tangent (δ) of 0.001 at 15 GHz. The higher-order mode, RDRA achieved the measured gain at 9.76 dBi and the measured impedance bandwidth as much 2.5 GHz which is 4.7% more compared to the fundamental mode. The result should be considered suitable for 5G applications.
Volume: 5
Issue: 3
Page: 584-592
Publish at: 2017-03-01

Material Handling and Assembly Process Optimization using Value Stream Mapping

10.11591/ijra.v6i1.pp59-68
Daniel Derrell Forest , G.H. Massiha
The purpose of this project is to evaluate and optimize an assembly process for ergonomic and productivity considerations. Companies use lean manufacturing as a method for continuous improvement in order to increase throughput and for to reallocate resources for more important tasks. For this project, value stream mapping (VSM) was used to evaluate, analyze, and improve the ergonomic factors of an assembly process and to increasing throughput. With the use of VSM, researchers are able to see the areas of added value, non-added value, and bottlenecks. This project illustrates the implementation of VSM for the minimization of waste, by using the design method to restructure the process of assembly. The results show drastic improvement in assembly time and ergonomic workplace design, while providing a platform for a continuous improvement system.
Volume: 6
Issue: 1
Page: 59-68
Publish at: 2017-03-01

Path Planning of the Fire Escaping System Using Active Detection Module

10.11591/ijra.v6i1.pp21-30
Ying Yao Ting , Huan Sheng Wang , Kuo Lan Su
This article proposes a security system which detects the fire events and plans the moving route. Each robot with several modules owns the shape of cylinder and height, weight and diameter is 18cm, 1.5kg and 8cm. A main controller (STC12C5A60S2) equips robots as a microprocessor. Each robot has the capability to escape from the fire scene. Whenever detecting fires and obstacles using image sensor and reflective IR sensors, robots send the ID code, orientation, and position to the centralized computer and other robots. After other robots have confirmed the fire events, the centralized computer uses the Gaussian probability function to calculate the danger values of the surrounding points near the fire source. And Bayesian estimation method is applied to compute the total estimated value of each point in platform. Furthermore, the total weighted values of all points are shown in a platform and its aim is to enlarge the difference between danger and safety without ambiguity. A* algorithm is used in the escaping routes are planned by a centralized computer. The mobile robot follows the leading of the supervised computer autonomously to escape from dangerous areas. The air-fuel ratio and the rate of increasing in temperature with distance are directly proportional to the danger value. Associating the increasing temperature rate with three-fire sources, it is verified to be an efficient system.
Volume: 6
Issue: 1
Page: 21-30
Publish at: 2017-03-01

Investigating the Written Exam Scores’ Prediction Power of TEOG Exam Scores

10.11591/ijere.v6i1.6344
Hakkı Kontaş , Esen Turan Ozpolat
The purpose of this study was to investigate exam scores’ predicting Transition from Primary to Secondary Education (TEOG) exam scores. The research data were obtained from the records of 1035 students studying at the first term of eighth grade in 2015-2016 academic year in e-school system. The research was on relational screening model. Linear regression model was used for the analysis of data. The analysis results proved that there was a high level significant relationship between exam scores and TEOG exam scores.
Volume: 6
Issue: 1
Page: 31-37
Publish at: 2017-03-01

Values of Local Wisdom: A Potential to Develop an Assessment and Remedial

10.11591/ijere.v6i1.6349
Iwan Setia Kurniawan , Uus Toharudin
This study aimed to describe the ability of student teachers of biology at Pasundan University in developing assessment and remedial based on local wisdom (local wisdom). This research uses descriptive quantitative and comparative approach, the data obtained by the data analysis described to obtain information or a description of these results, further students' ability in comparison. Tests of significance using parametric tests with two-tailed t-test. The population in this study as many as 197 students were divided into 38 groups, 38 groups divided into each of 19 groups and 19 groups remedial assessment. The sample in this research is divided each as much as 13 groups. Data collected by the non-test, the data obtained from a document or report student assignments given a score based on the indicators are divided into several aspects of assessment, data analysis was performed by descriptive statistical. The results showed that the ability of student teachers of biology in developing assessment based on local wisdom including both categories with an average score of 62.23. Remedial teacher's ability to develop based on local wisdom included in the category enough with an average score of 64.31. The highest average score for the assessment is on the aspects of integration of local wisdom values of 71.92 and the lowest score on the aspect of validity assessment amounting to 56.92. The highest average score for remedial namely the implementation aspects of 71.54 and the lowest scores on originality aspects of 53.38. The test results show that the significance of the t (t) of -0.488, t table (t table) two tails at 2.179. p-value of 0.635. Assuming that if t <t table (-0.488 <2.179) or with a p-value> 0.05 (0.635> 0.05) can thus be concluded that students in developing assessment and remedial based on local wisdom has the same ability.
Volume: 6
Issue: 1
Page: 71-78
Publish at: 2017-03-01

Deep Neural Network Method for the Prediction of Xylitol Production

10.11591/ijeecs.v5.i3.pp691-696
Siti Noorain Mohmad Yousoff , ‘Amirah Baharin , Afnizanfaizal Abdullah
Bio-based chemical products such as xylitol have achieved remarkable attentions both in pharmaceutical and food industries due to their several advantages such as sugar substitute that can help diabetic patients and help in preventing tooth decay problem. To produce xylitol, recently, microbial host such as E. Coli often used as it is predicted that E. Coli can produce high level of xylitol. Therefore, metabolic engineering need to be done towards E. Coli and powerful tools are needed to manipulate, simulate and analyse the E. Coli metabolic pathway. Artificial intelligence methods such as deep neural network offer an efficient and powerful approach to be used to analyse the xylitol production value and at the same time to predict which genes and pathway that give biggest effect in the process to produce xylitol in E. Coli. Results show that, with an absence of genes pgi, tkt and tala, xylitol production can be boosted up to the higher level.
Volume: 5
Issue: 3
Page: 691-696
Publish at: 2017-03-01

The Usage of Recycle Materials for Science Practicum: Is There Any Effect on Science Process Skills?

10.11591/ijere.v6i1.6340
Setiyo Prajoko , Mohamad Amin , Fatchur Rohman , Muhana Gipayana
This study aimed at determining the effect of recycle materials usage for science practicum on students' basic science process skills of the Open University, Surakarta. Recycle materials are the term used for the obtained materials and equipment from the students’ environment by taking back the garbage or secondhand objects into goods or new products which have a benefit for practicum activities. Randomized posttest only control group design was applied in this study and involving 83 students which divided into experimental class and control class. Collected data were science process skills test and questionnaire. The results of this study obtained Kruskal Wallis test result of 0.000<0.05. So, there was effect of recycle materials usage for science practicum on students’ science process skills. Students also provided positive feedback on the use of recycle materials for science lab activities.
Volume: 6
Issue: 1
Page: 1-8
Publish at: 2017-03-01

Current Steering Digital Analog Converter with Partial Binary Tree Network (PBTN)

10.11591/ijeecs.v5.i3.pp643-649
Mohd Tafir Mustaffa , Yong Cheng Lim , Choon Yan Teh
DACs are essential devices in many digital systems which require high performance data converters. Thus, shrinking of supply voltage, budget constraints of test times, and rising bandwidth requirement causing DAC architectures to highly relying on matched components to perform data conversions. However, matched components are nearly impossible to fabricate; there are always mismatch errors which causes the difference between the designed and actual component value. Dynamic Element Matching (DEM) is one of the techniques that are commonly used to reduce component mismatch error. This technique is a randomization technique to select one of the appropriate codes for each of the digital input value before entering DAC block. Thus, in this research, a new DEM algorithm is proposed on Current-Steering DAC with Partial Binary Tree Network (PBTN) algorithm that utilizes a lower complexity circuit to produce output signals with less glitches. Simulation results for 6-bit 1-MSB PBTN DAC produces 0.3184LSB of DNL, 0.0062LSB of INL, and a power consumption of 14.13 mW, while using only 126 transmission gates.
Volume: 5
Issue: 3
Page: 643-649
Publish at: 2017-03-01

A Hybrid Chebyshev-ICA Image Fusion Method Based on Regional Saliency

10.12928/telkomnika.v15i2.6147
Zaid; Universiti Teknologi Malaysia Omar , Tania; Universiti Teknologi Malaysia Stathaki , Musa; Universiti Teknologi Malaysia M. Mokji , Lila; Universiti Teknologi Malaysia Iznita Izhar
An image fusion method that performs robustly for image sets heavily corrupted by noise is presented in this paper. The approach combines the advantages of two state-of-the-art fusion techniques, namely Independent Component Analysis (ICA) and Chebyshev Poly-nomial Analysis (CPA) fusion. Fusion using ICA performs well in transferring the salient features of the input images into the composite output, but its performance deteriorates severely under mild to moderate noise conditions. CPA fusion is robust under severe noise conditions, but eliminates the high frequency information of the images involved. We pro-pose to use ICA fusion within high activity image areas, identified by edges and strong textured surfaces and CPA fusion in low activity areas identified by uniform background regions and weak texture. A binary image map is used for selecting the appropriate method, which is constructed by a standard edge detector followed by morphological operators. The results of the proposed approach are very encouraging as far as joint fusion and denoising is concerned. The works presented may prove beneficial for future image fusion tasks in real world applications such as surveillance, where noise is heavily present.
Volume: 15
Issue: 2
Page: 934-941
Publish at: 2017-03-01

Local Binary Fitting Segmentation by Cooperative Quantum Particle Optimization

10.12928/telkomnika.v15i1.3159
Desheng; Anhui Science and Technology University Li , Qian; Guilin University of Electronic Technology He , Liu; Anhui Science and Technology University Chunli , Yu; Anhui Science and Technology University Hongjie
Recently, sophisticated segmentation techniques, such as level set method, which using valid numerical calculation methods to process the evolution of the curve by solving linear or nonlinear elliptic equations to divide the image availably, has become being more popular and effective. In Local Binary Fitting (LBF) algorithm, a simple contour is initialized in an image and then the steepest-descent algorithm is employed to constrain it to minimize the fitting energy functional. Hence, the initial position of the contour is difficult or impossible to be well chosen for the final performance. To overcoming this drawback, this work treats the energy fitting problem as a meta-heuristic optimization algorithm and imports a varietal particle swarm optimization (PSO) method into the inner optimization process. The experimental results of segmentations on medical images show that the proposed method is not only effective to both simple and complex medical images with adequate stochastic effects, but also shows the accuracy and high efficiency.
Volume: 15
Issue: 1
Page: 531-539
Publish at: 2017-03-01
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