Articles

Access the latest knowledge in applied science, electrical engineering, computer science and information technology, education, and health.

Filter Icon

Filters article

Years

FAQ Arrow
0
0

Source Title

FAQ Arrow

Authors

FAQ Arrow

29,167 Article Results

The Learning Syntax Through Edmodo in the Beginners Class

10.11591/ijere.v6i4.10773
Sugito Sugito , Sri Mulyani Endang Susilowati , Hartono Hartono , Supartono Supartono
Integrating ICT (Information and Communications Technology) in the learning process is a necessity for a teacher in welcoming the 21st century. Knowledge and modern technology require teachers to learn how to use the technology in their teaching. Edmodo application is a very useful technology product in the learning process. Successful use of Edmodo applications in learning is influenced by: (1) teacher factors that include education, length of teaching, age, gender, frequent training, openness of teachers in accessing information, teaching places (city or village), and participation in the organization teachers and pedagogic competencies of educators in delivering materials, (2) facilities and infrastructure factors: building, room, hardware, software, internet connection, infrastructure to school, and instruction on using Edmodo application (3) learner factors that include motivation, courage to explore using Edmodo, and frequency of use of Edmodo app.
Volume: 6
Issue: 4
Page: 299-305
Publish at: 2017-12-01

Identifying the Optimal Controller Strategy for DC Motors

10.11591/ijra.v6i4.pp252-268
M. R. Qader
The aim of this study is to design a control strategy for the angular rate (speed) of a DC motor by varying the terminal voltage. This paper describes various designs for the control of direct current (DC) motors. We derive a transfer function for the system and connect it to a controller as feedback, taking the applied voltage as the system input and the angular velocity as the output. Different strategies combining proportional, integral, and derivative controllers along with phase lag compensators and lead integral compensators are investigated alongside the linear quadratic regulator. For each controller transfer function, the step response, root locus, and bode plot are analysed to ascertain the behaviour of the system, and the results are compared to identify the optimal strategy. It is found that the linear quadratic controller provides the best overall performance in terms of steady-state error, response time, and system stability. The purpose of the study that took place was to design the most appropriate controller for the steadiness of DC motors. Throughout this study, analytical means like tuning methods, loop control, and stability criteria were adopted. The reason for this was to suffice the preconditions and obligations. Furthermore, for the sake of verifying the legitimacy of the controller results, modelling by MATLAB and Simulink was practiced on every controller.
Volume: 6
Issue: 4
Page: 252-268
Publish at: 2017-12-01

Islanding Detection in a Distribution System with Modified DG Interface Controller

10.11591/ijape.v6.i3.pp133-141
Abbineni Sai Subhadra , P. Linga Reddy , Shailesh B. Modi
Islanding detection of Distributed Generation (DG) is considered as one of the most important aspects when interconnecting DGs to the distribution system. It was the crucial problem in distributed generation. This detection phenomenon having a great importance. These detection methods are divided into active and passive islanding detection. These two methods are based on changing in parameters such as frequency, voltage and current harmonics. But these methods have some challenges such as reduction in power quality and large Non Detection Zone (NDZ). In this paper, the proposed method is change of Total Harmonic Distortion (THD) will be studied for islanding detection diagnosis. The studied system was considered by following the standard IEEE-1547 and UL-1741. The system was simulated using MATLAB/ SIMULINK.
Volume: 6
Issue: 3
Page: 133-141
Publish at: 2017-12-01

Research Designs and Methods in Self-assessment Studies: A Content Analysis

10.11591/ijere.v6i4.8921
Serafina Pastore
This paper focuses on self-assessment practices in the higher education field. In the assessment for learning perspective, self-assessment is related to reflection, metacognition, and self-regulation: all these aspects are considered as fundamental prerequisites for students’ future professional development. Despite the recognition of self-assessment educational benefits and implications, research so far lags behind the rise in the rates of align literature review, research design, and methodology. The study attempts to address this gap in the literature. Based on a critical review of institutional changes in the European higher education context, the paper reflected on main issues and problems faced by educational research on self-assessment. It then tried to identify future research pathways on this topic.
Volume: 6
Issue: 4
Page: 257-264
Publish at: 2017-12-01

Execution Evaluation of End-to-end Security Conventions in an Internet of Things

10.11591/ijeecs.v8.i3.pp719-720
Sudha Mishra , A. Arivazhagan
Remote Sensor Networks are bound to assume a crucial part in the cutting edge Internet, which will be described by the Machine-to-Machine worldview, as indicated by which; installed gadgets will effectively trade data, therefore empowering the improvement of creative applications. It will add to declare the idea of Internet of Things, where end to-end security speaks to a key issue. In such setting, it is essential to comprehend which conventions can give the correct level of security without loading the restricted assets of compelled systems. This paper displays an execution examination between two of the most broadly utilized security conventions: IPSec and DTLS. We give the investigation of their effect on the assets of gadgets.
Volume: 8
Issue: 3
Page: 719-720
Publish at: 2017-12-01

Steady State and Transient Analysis of Grid Connected Doubly Fed Induction Generator Under Different Operating Conditions

10.11591/ijape.v6.i3.pp171-192
Sukhwinder Singh Dhillon , Jagdeep Singh Lather , Sanjay Marwaha
This paper present steady state and dynamic (Transient) models of the doubly fed induction generator connected to grid. The steady state model of the DFIAG (doubly fed asynchronous induction generator) has been constructed by referring all the rotor quantities to stator side. With the help of MATLAB programming simulation results are obtained to depict the steady state response of electromechanical torque, rotor speed, stator and rotor currents, stator and rotor fluxes, active and reactive drawn and delivered by Doubly Fed Asynchronous Induction Machine (DFAIM) as it is operating in two modes i.e. generator and motor. The mathematical steady state and transient model of the DFIAM is constructed for three basic reference frames such as rotor, stator and synchronously revolving reference frame using first order deferential equations. The effect of unsaturated and saturated resultant flux on the mutual inductance is also taken into account to deeply understand the dynamic response of the machine. The steady state and dynamic response of the DFAIG are compared for different rotor voltage magnitudes. Also, the effect of variations in mechanical input torque, stator voltage variations are simulated to predict the stator and rotor currents, active and reactive power, electromagnetic torque and rotor speed variations.
Volume: 6
Issue: 3
Page: 171-192
Publish at: 2017-12-01

Finding Knowledge from Indonesian Traditional Medicine using Semantic Web Rule Language

10.11591/ijece.v7i6.pp3674-3682
Ridowati Gunawan , Khabib Mustofa
One of the natural resources in Indonesia is a lot of plants which can be used in healing diseases. Thosekinds of plants can be used in “Jamu”. Jamu is a name given to traditional medicine in Indonesia. Usually Jamu is composed from several plants as ingredients. Particularly, some parts of the plant like the leaves, roots, or branches have different purpose in Jamu. Nowadays the knowledge about Jamu can be known by building Ontology. Ontology can be built and developed to enrich the content. Knowledge in Ontology is built by several rules using Semantic Web Rule Language (SWRL).Knowledge gained from SWRL is easily searchable so that users can double check the results obtained.
Volume: 7
Issue: 6
Page: 3674-3682
Publish at: 2017-12-01

Optimal Power Flow Based Economic Generation Scheduling in Day-ahead Power Market

10.11591/ijape.v6.i3.pp123-132
Kshitij Choudhary , Rahul Kumar , Dheeresh Upadhyay , Brijesh Singh
The present work deals with the economic rescheduling of the generation in an hour-ahead electricity market. The schedules of various generators in a power system have been optimizing according to active power demand bids by various load buses. In this work, various aspects of power system such as congestion management, voltage stabilization and loss minimization have also taken into consideration for the achievement of the goal. The Interior Point (IP) based Optimal Power Flow (OPF) methodology has been used to obtain the optimal generation schedule for economic system operation. The IP based OPF methodology has been tested on a modified IEEE-30 bus system. The obtained test results shows that not only the generation cost is reduced also the performance of power system has been improved using proposed methodology.
Volume: 6
Issue: 3
Page: 123-132
Publish at: 2017-12-01

Optimal Path Planning using Equilateral Spaces Oriented Visibility Graph Method

10.11591/ijece.v7i6.pp3046-3051
Nor Badariyah Abdul Latip , Rosli Omar , Sanjoy Kumar Debnath
Path planning has been an important aspect in the development of autonomous cars in which path planning is used to find a collision-free path for the car to traverse from a starting point Sp to a target point Tp. The main criteria for a good path planning algorithm include the capability of producing the shortest path with a low computation time. Low computation time makes the autonomous car able to re-plan a new collision-free path to avoid accident. However, the main problem with most path planning methods is their computation time increases as the number of obstacles in the environment increases. In this paper, an algorithm based on visibility graph (VG) is proposed. In the proposed algorithm, which is called Equilateral Space Oriented Visibility Graph (ESOVG), the number of obstacles considered for path planning is reduced by introducing a space in which the obstacles lie. This means the obstacles located outside the space are ignored for path planning. From simulation, the proposed algorithm has an improvement rate of up to 90% when compared to VG. This makes the algorithm is suitable to be applied in real-time and will greatly accelerate the development of autonomous cars in the near future.
Volume: 7
Issue: 6
Page: 3046-3051
Publish at: 2017-12-01

Experimental Analysis of Factors Affecting the Power Output of the PV Module

10.11591/ijece.v7i6.pp3190-3197
Arjyadhara Pradhan , Bhagbat Panda
Energy is the driving force in all the sectors as it acts like an index of standard of living or prosperity of the people of the country. However heavy dependence on fossil fuels leads to global warming, hence there is a need for the use of clean, sustainable, and eco friendly form of energy. Among the various types of non-conventional energy solar energy is the fundamental as it is abundant, pollution free and universally available.Even though the main input to the PV system is the solar radiation still there are other factors which affects the efficiency of the pv module. In this paper real time experiment has been conducted to analyze the effect of various factors like irradiance, temperature, and angle of tilt, soiling, shading on the power output of the pv module. Temperature is a negative factor which reduces the efficiency of the module and can be reduced by various cooling arrangements. Presence of dust particles and shading obstructs the incident solar radiations entering the panel and the effect is seen in the iv and pv curve .For better performance solar tracking at maximum power point is suggested to improve the power output of the pv module.
Volume: 7
Issue: 6
Page: 3190-3197
Publish at: 2017-12-01

Power Management in Microgrid: Analysis in Grid Connected and Islanded Mode of Operation

10.11591/ijape.v6.i3.pp160-170
Niraj Kumar Choudhary , Soumya Ranjan Mohanty , Ravindra Kumar Singh
This paper presents an investigation about the impact of integrating renewable energy based generation sources on the existing distribution system in terms of load sharing. The study of load sharing among various distributed generators (DGs) and utility grid has been performed for two cases: (a) when equivalent source based DG is connected and (b) when real PV/Fuel cell based DG is properly integrated to the distribution system. The real photovoltaic and fuel cell based DG do not behave as stiff current/voltage source due to disturbances happening either internally in system known as parametric uncertainties or due to external disturbances like weather conditions, load change etc. Further it has been observed with extensive analysis using simulation result, that even though all DGs are of equal capacity in their generation but when the load is either increased or decreased this doesn’t essentially guarantee that all DGs will equally share the active and reactive power demand.
Volume: 6
Issue: 3
Page: 160-170
Publish at: 2017-12-01

Wireless Fault Detection System for an Industrial Robot Based on Statistical Control Chart

10.11591/ijece.v7i6.pp3421-3435
Alaa Abdulhady Jaber , Robert Bicker
Industrial robots are now commonly used in production systems to improve productivity, quality and safety in manufacturing processes. Recent developments involve using robots cooperatively with production line operatives. Regardless of application, there are significant implications for operator safety in the event of a robot malfunction or failure, and the consequent downtime has a significant impact on productivity in manufacturing. Machine healthy monitoring is a type of maintenance inspection technique by which an operational asset is monitored and the data obtained is analysed to detect signs of degradation and thus reducing the maintenance costs. Developments in electronics and computing have opened new horizons in the area of condition monitoring. The aim of using wireless electronic systems is to allow data analysis to be carried out locally at field level and transmitting the results wirelessly to the base station, which as a result will help to overcome the need for wiring and provides an easy and cost-effective sensing technique to detect faults in machines. So, the main focuses of this research is to develop an online and wireless fault detection system for an industrial robot based on statistical control chart approach. An experimental investigation was accomplished using the PUMA 560 robot and vibration signal capturing was adopted, as it responds immediately to manifest itself if any change is appeared in the monitored machine, to extract features related to the robot health conditions. The results indicate the successful detection of faults at the early stages using the key extracted parameters.
Volume: 7
Issue: 6
Page: 3421-3435
Publish at: 2017-12-01

Child Tracker: Presence and Location Finding System to Protect Child from Missing and Unexpected Cases

10.11591/ijeecs.v8.i3.pp743-746
G. Senthilnathan
Many times children on their own are getting away from parent's view at home or on crowded areas like malls and beach. Not in all cases, but rather from time to time it is unpretentious the kids and hopeless things happening moreover. So it is fundamental for each parent to have a dominating reaction for shield the child from missing. However, the couple of GPS based after things are open in the market, they cost high and also needs a month to month charge for GSM advantage. Energize GPS is significant for outside after and not for nearby spots like strip shopping centers or houses. Also, the things accessible in the market are not viewing the improvement of a young wearing it. Our answer utilizes two contraptions for parent and tyke, clear RF correspondence between gadgets, virtual fencing using RF and tyke improvement viewing. The parent and child can wear this device rather than watch since it displays time data to them.
Volume: 8
Issue: 3
Page: 743-746
Publish at: 2017-12-01

The Effective Optimization Methods of Port Activity on the Basis of Algorithmic Model

10.11591/ijece.v7i6.pp3578-3582
A. Nyrkov , A. Shnurenko , S. Sokolov , S. Chernyi , V. Korotkov
The article considers the inland waterways (IW) within the international transport corridors as multiphase systems of mass service (SMS) and shows the distinction in calculation of the important indicator of system efficiency - the average total waiting time of vessel service in the serving subsystems, the application of genetic algorithms to increase the efficiency of reloading processes.
Volume: 7
Issue: 6
Page: 3578-3582
Publish at: 2017-12-01

An STATCOM-based Hybrid Shunt Compensation Scheme Capable of Damping Subsynchronous Resonance

10.11591/ijape.v6.i3.pp150-159
F. Reyhaneh Mehdizadeh , Daryoush Nazarpour
The paper presents the potential use of supplemental control of a new economical phase imbalanced shunt compensation concept for damping sub synchronous resonance (SSR) oscillations. In this scheme, the shunt capacitive compensation in one phase is created by using a Single-Phase Static Synchronous Compensator (STATCOM) in parallel with a fixed capacitor (Cc), and the other two phases are compensated by fixed shunt capacitor (C). The proposed arrangement would, certainly, be economically attractive when compared with a full three-phase STATCOM which have been used/proposed for power swings and SSR damping. SSR mitigation is achieved by introducing a supplemental signal into the control loops of single phase STATCOM. The validity and effectiveness of the proposed structure and supplemental control are demonstrated on a modified version of the IEEE second benchmark model for computer simulation of sub synchronous resonance by means of time domain simulation analysis using the Matlab program.
Volume: 6
Issue: 3
Page: 150-159
Publish at: 2017-12-01
Show 1455 of 1945

Discover Our Library

Embark on a journey through our expansive collection of articles and let curiosity lead your path to innovation.

Explore Now
Library 3D Ilustration