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28,188 Article Results

Science Teachers’ Opinions on Application of Competency-Based Science Model Components to Science Programs

10.11591/ijere.v6i2.7590
Suleyman Yaman
The aim of this study is to reveal the opinions of teachers, who gave the science lessons that took effect in Turkey in 2004 and 2013, on the sub-components of the programs and to identify to what extent the objectives of the program have been achieved. In total 89 teachers, out of which 42 were females and 47 were males, in the study which was conducted by the semi-structured interview method. Data collected from the study, where five questions were asked to teachers, was settled by analyzing the science programs according to components of the Ohio Competency Based Science Model. While result from the study shows that the teachers were qualified to ensure the development of some behaviors that were expected to be seen on the students as a result of science programs; especially the students gave a lower level of positive opinion about the components related with how they will use this data. In addition; while the teachers supported that the scientific process skills, are one of the basic elements of science programs, were sufficient for the gain of basic skills, they stated that they are not sufficient for the gain of some causal and experimental skills.
Volume: 6
Issue: 2
Page: 118-127
Publish at: 2017-06-01

Real Time Interactive Presentation Apparatus based on Depth Image Recognition

10.11591/ijece.v7i3.pp1308-1315
Ahmad Hoirul Basori , Omar M. Barukab
The research on human computer interaction. Human already thinking to overcome the way of interaction towards natural interaction. Kinect is one of the tools that able to provide user with Natural User Interface (NUI). It has capability to track hand gesture and interpret their action according to the depth data stream. The human hand is tracked in point of cloud form and synchronized simultaneously.The method is started by collecting the depth image to be analyzed by random decision forest algorithm. The algorithm will choose set of thresholds and features split, then provide the information of body skeleton. In this project, hand gesture is divided into several actions such as: waiving to right or left toward head position then it will interpret as next or previous slide. The waiving is measured in degree value towards head as center point. Moreover, pushing action will trigger to open new pop up window of specific slide that contain more detailed information. The result of implementations is quite fascinating, user can control the PowerPoint and event able to design the presentation form in different ways. Furthermore, we also present a new way of presentation by presenting WPF form that connected to database for dynamic presentation tools
Volume: 7
Issue: 3
Page: 1308-1315
Publish at: 2017-06-01

An Active Virtual Impedance Control Algorithm for Collision Free Navigation of a Mobile a Robot

10.11591/ijra.v6i2.pp99-111
Jinho Kim , Jangmyung Lee
An modified active virtual impedance control has been proposed for collision free navigation of a mobile robot to avoid front obstacles dynamically while a mobile robot is following a sound source. A mobile robot is controlled to follow a sound source with a velocity which is determined by virtual repulsive and attraction forces to avoid obstacles and to follow the sound source, respectively. To generate the virtual repulsive and attraction forces, a new modified virtual impedance is defined as a function of the distances and relative velocities to the sound source and obstacles from the mobile robot. In the conventional virtual impedance method, fixed coefficients have been used for the virtual impedance control. In this research, the coefficients are dynamically adjusted to elaborate the obstacle avoidance performance in various situations such as the multiple moving obstacles environment. A microphone array consisting of three microphones in a row has been attached on the mobile robot to detect the relative distance and velocity to the obstacles. The relative position and orientation of the sound source against the mobile robot has been estimated using the geometrical relationship of the microphones. As an application, the mobile robot can be used as a pet robot following the master with a sound source. The effectiveness of the proposed algorithm has been demonstrated through real experiments.
Volume: 6
Issue: 2
Page: 99-111
Publish at: 2017-06-01

Format of Options in a Multiple Choice Test Vis-a-Vis Test Performance

10.11591/ijere.v6i2.7594
Hermabeth O. Bendulo , Erlinda D Tibus , Rhodora A Bande , Voltaire Q Oyzon , Myrna L Macalinao , Norberto E Milla
Testing or evaluation in an educational context is primarily used to measure or evaluate and authenticate the academic readiness, learning advancement, acquisition of skills, or instructional needs of learners. This study tried to determine whether the varied combinations of arrangements of options and letter cases in a Multiple-Choice Test (MCT) affect the test performance of the homogenous BEED students. A test was designed and administered to test the performance across test items employing different arrangement of options (Cascading, Inverted N, Z eye movement, and One-line Horizontal) and across case of letter options (upper and lower case), that is, a total of eight (8) treatments. The statistical analyses revealed that there is an insignificant difference in the mean performance of students in relation to letter cases and arrangement of letter choices in a multiple choice test. Thus, the test performance of students in a multiple choice type of test does not depend on either letter cases or arrangement of letter choices.
Volume: 6
Issue: 2
Page: 157-163
Publish at: 2017-06-01

Delta Parallel Robot Based on Crank-Slider Mechanism

10.11591/ijra.v6i2.pp112-120
Zhe Qin , Xiao-Chu Liu , Zhuan Zhao
A three-degree-of-freedom Delta parallel manipulator driven by a crank-slider mechanism is proposed. In Cartesian space, a gate-shaped curve is taken as the path of the pick-and-place operation, combining with the inverse kinematics theory of the Delta robot, and a mathematical model of robot statia force transmission is established. The force and the output torque of the robot-driven joint are taken as the main performance indexes, and the value of the crank-slider mechanism applied to Delta robot is further measured. The simulation results show that the delta robot driven by the crank slider mechanism can reduce the force and output torque of the driving joint during the picking and discharging operation, and has good practical application value.
Volume: 6
Issue: 2
Page: 112-120
Publish at: 2017-06-01

Multi-output Portable Universal Power Supply Kit with Plug-and-Use Equipment for Emergency Application

10.11591/ijeecs.v6.i3.pp497-503
A. Nazifah Abdullah , M. Asri Jusoh , Norkharziana Mohd Nayan , M. Syahril , N. Nadiah Ayop
This paper presents design and analysis of Multi-output Portable Universal Power Supply Kit (EPS Kit). This EPS Kit is intended as an alternative power supply kit to reduce the issue of a power outage. Lead Acid Battery which is considered one of the easiest sources that can be found during an emergency state is the best alternative energy source. The EPS Kit is designed to store the power in Lead Acid Battery as the main source and powered by the solar energy as the secondary source and will be providing both standard household alternating current (AC) and most common direct current (DC) power. This Kit is a stand-alone system comes with plug-and-use kit in which the system can be recharged using solar and AC power. The plug-and-use kit is equipped with intelligent multi-USB ports, adjustable dual mode NiCd, Ni-Mh, and Li-Ion battery which are Discharge/Charger mode, AC output port, LED lamp, and emergency electrical accessories. EPS Kit is also portable which installed with wheel and handle for mobility application. Production of EPS Kit is involved software and hardware. The software used are 3D CAD design software and circuit simulation software respectively for preliminary 3D drawing design and output circuit validation. Experimental results of the EPS Kit load testing, charging and discharging state are conducted in order to demonstrate the EPS Kit functionality and usage.
Volume: 6
Issue: 3
Page: 497-503
Publish at: 2017-06-01

Improved Sensorless Direct Torque Control of Induction Motor Using Fuzzy Logic and Neural Network Based Duty Ratio Controller

10.11591/ijai.v6.i2.pp79-90
Sudheer H , Kodad SF , Sarvesh B
This paper presents improvements in Direct Torque control of an induction motor using Fuzzy logic with Fuzzy logic and neural network based duty ratio controller. The conventional DTC (CDTC) of induction motor suffers from major drawbacks like high torque and flux ripples and poor transient response. Torque and flux ripples are reduced by replacing hysteresis controller and switching table with Fuzzy logic switching controller (FDTC). In FDTC the selected switching vector is applied for the complete switching time period. The FDTC steady state performance can be improved by using duty ratio controller, the selected switching vector is applied only for the time determined by the duty ratio (δ) and for the remaining time period zero switching vector is applied. The selection of duty ratio using Fuzzy logic and neural networks is projected in this paper. The effectiveness proposed methods are evaluated using simulation by Matlab/Simulink.
Volume: 6
Issue: 2
Page: 79-90
Publish at: 2017-06-01

Trend of De La Salle Lipa Education Graduates’ Performance in the Licensure Examination for Teachers (LET) from 2011 to 2015

10.11591/ijere.v6i2.7592
Maria Theresa Bolo Kalaw
This study aimed to examine the trend of performance of De La Salle Lipa (DLSL) education graduates in the Licensure Examination for Teachers (LET). Quantitative trend analysis employed on the data collected from records officially released by the Professional Regulation Commission (PRC) for the years 2011 to 2015 revealed that the performance of both elementary and secondary education passers were significantly higher than the national passing rates and showed a significant relationship between the graduates’ English proficiency and their LET- General Education performance. When grouped according to their profile, there were significant differences in the education graduates’ performance in terms of the year LET was taken, their GPA, and results of English Proficiency and Culture Fair Intelligence Tests but not in terms of their field of specialization. These results were considered in proposing a syllabus incorporating the strategies to further improve the program offerings of the Education Department particularly in terms of curriculum development, recruitment and selection of qualified students, continuous professional training for faculty, and more intensified LET review for the education graduates. Findings of the study showed that DLSL is eligible to qualify as a Center of Development in Teacher Education in the area of instructional quality.
Volume: 6
Issue: 2
Page: 138-149
Publish at: 2017-06-01

Designing of Robot Gamelan Music using ATmega 16 Microcontroller

10.11591/ijra.v6i2.pp121-130
Handri Jir Azhar , Ferry Hadary , Syaifurrahman Syaifurrahman
This paper presents a robot concept which is the robot can play the instrumental Gamelan music. Gamelan is a percussive instrument. Instrumental Gamelan music keys are consist of 2 octaves in 15 tones. Robot Gamelan music is using proportional-derivative (PD) control system. PD control of the robot is by controlling DC gear motor position to desired Gamelan key position. Robot Gamelan music using ATmega 16 microcontroller as a controller. Feedback of PD control is using magnetic rotary encoder (MRE) sensor. PD control is using the constant. The constant functions of PD control are determining the pulse width modulation (PWM) toward DC gear motor velocity in order to reposition a gamelan key position and pushing down the errors.
Volume: 6
Issue: 2
Page: 121-130
Publish at: 2017-06-01

Aging Detection of Glass Disc Insulator by using Infrared Camera

10.11591/ijeecs.v6.i3.pp520-527
Mohammed Imran Mousa , Zulkurnain Abdul-Malek , Zainab Imran Mousa
Suitable diagnostic techniques for outdoor glass insulators are important for ensuring the reliablilty and stability of power system. The possibility of insulator flash-over increases, especially when the insulator is covered by pollution layers or has an internal defect. In this paper, a new technique to detect the pollution level and invisible damage by measuring the surface temperature of glass disc insulators is proposed. A high definition camera had been used to determine the surface temperatures of four glass insulators. The effects of applied voltage on the surface temperature and its distribution were studied. The results show the possibility of using the infrarad camera to detect the aging level and invisible damages of the glass insulators.
Volume: 6
Issue: 3
Page: 520-527
Publish at: 2017-06-01

Assessment of the Ethical Orientations of Turkish Teachers

10.11591/ijere.v6i2.6339
Ozlem Ural , Soheyda Gokturk , Oguzhan Bozoglu
Students’ development in terms of values, moral education and character is crucial for the culture of any society. Considering that these are gained through family and school, school principals and teachers can be the key players.  Even if teachers do not deliberately act as models or ethic agents, or their main purpose is not merely ethical education, they still affect the students directly and indirectly. Therefore, exploration of their ethical decisions and what orientations guide them in making those ethical decisions is highly important. In this regard, teachers’ ethical orientation is worth measuring. In this study, Ethical Position Questionnaire [1], which has so far been commonly used to explore ethical orientations of a variety of professionals and cultural groups was translated into Turkish; and validity and reliability study was applied on teachers. Research group consisted of 251 primary school teachers working in state schools located in Kocaeli province, Turkey. To identify the construct validity of Ethical Position Questionnaire (EPQ), factor analysis was conducted. The analysis revealed that EPQ is two factor-structured and these factors explain 45% of the variance. Cronbach’s Alpha internal consistency reliability assessed for the total items of Turkish version of EPQ was .81 and for the first subscale –idealism-, for the second scale –relativism- was found .84 and .86 respectively. In conclusion, The Turkish version of Ethical Position Questionnaire was identified as a valid and reliable research tool to assess ethical positions of primary school teachers.
Volume: 6
Issue: 2
Page: 183-188
Publish at: 2017-06-01

Networked Service Robots Control and Synchronization with Surveillance System Assistance

10.11591/ijra.v6i2.pp80-98
Doug Kim
This paper proposes an efficient navigation control and synchronization mechanism of multiple networked robots for operation in large confined areas. An adaptable grid based navigation and control strategy is adopted to eliminate potential collisions among robots. Unexpected obstacles are handled and the speed of individual robot is maintained using the node-ordering technique. The proposed navigation control and synchronization mechanism is scalable and can be easily extended for multi-cell large environment. The obstacles information is gathered through local information by the robots for better planning of the navigation. The system collaborates with the existing surveillance systems in case of additional visual information is necessary. The interaction with the surveillance system is minimized to reduce potential overhead. The proposed methodology is evaluated for a large-scale simulation with multiple robots.
Volume: 6
Issue: 2
Page: 80-98
Publish at: 2017-06-01

Teacher Behaviours Explaining Turkish and Dutch Students’ Mathematic Achievements

10.11591/ijere.v6i2.7596
Seher Yalcın
The purpose of this study was to examine the differences between Turkish and Dutch students’ mathematics achievement and to examine the predictive level of teacher behaviours for student performance. The participants were 3210 students and principals from 168 schools in Turkey and 2541 students and principals from 156 schools in the Netherlands, who attended the Program for International Student Assessment in 2012. According to the results of the multilevel latent class and three-step analyses, for both countries, teacher behavior related to student orientation, teacher focus on student achievement and formative assessment predicted the mathematical achievement. It is seen that a high level of teacher behavior related to student orientation and formative assessment plays an important role in schools’ achievement at very low, low, and low-medium levels for Turkey and at medium and medium-high levels for the Netherlands. Furthermore, it was determined that the students who had low- or medium-level achievement were more affected by teacher characteristics/behaviours.
Volume: 6
Issue: 2
Page: 174-182
Publish at: 2017-06-01

Quadrotor Control System with Hand Movement Sign as an Alternative Remote Control

10.11591/ijra.v6i2.pp131-140
Nur Achmad Sulistyo Putro , Andi Dharmawan , Tri Kuntoro Priyambodo
Quadrotor is an unmanned aerial vehicle which is controlled by remote control. Unfortunately, not all of the remote control are easy to use, especially for people who have lacking abilities in piloting. This study aims to design a prototype system to control  quadrotor using hand movements, as an alternative to the conventional remote control that more simple. This system is consists of 2 parts, quadrotor and handheld. Both systems can communicate wirelessly using radio frequency 2.4 GHz. The handheld system will read the orientation angle of the hand by IMU sensor and it will be converted into a command to determine the direction motion of the quadrotor. To get the orientation angle from the IMU sensor data, we used DCM sensor fusion method. Quadrotor needs a control system that can make its respond runs optimally. In this study, the method of the control system that used is PID controller. The PID gain obtained using Ziegler-Nichols oscillation method and then fixed again by fine-tuned method.
Volume: 6
Issue: 2
Page: 131-140
Publish at: 2017-06-01

A Guided Ant Colony Optimization Algorithm for Conflict-free Routing Scheduling of AGVs Considering Waiting Time

10.11591/ijra.v6i2.pp69-79
Li Junjun , Xu Bowei , YANG Yongsheng , Wu Huafeng
Efficient conflict-free routing scheduling of automated guided vehicles (AGVs) in automated logistic systems can improve delivery time, prevent delays, and decrease handling cost. Once potential conflicts present themselves on their road ahead, AGVs may wait for a while until the potential conflicts disappear besides altering their routes. Therefore, AGV conflict-free routing scheduling involves making routing and waiting time decisions simultaneously. This work constructs a conflict-free routing scheduling model for AGVs with consideration of waiting time. The process of the model is based on calculation of the travel time and conflict analysis at the links and nodes. A guided ant colony optimization (GACO) algorithm, in which ants are guided to avoid conflicts by adding a guidance factor to the state transition rule, is developed to solve the model. Simulations are conducted to validate the effectiveness of the model and the solution method.
Volume: 6
Issue: 2
Page: 69-79
Publish at: 2017-06-01
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