Articles

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

Advanced Search
Filter Icon

Filters article

Years

FAQ Arrow
Single Year
Range Year
0
0

Source Title

FAQ Arrow

Authors

FAQ Arrow

31,456 Article Results

Perceptions and experiences of students on the use of interactive online learning technologies in Mauritius

10.11591/ijere.v9i4.20692
Parmeswar Ramkissoon , Louis Jinot Belle , Trishnee Bhurosy
With the advent of e-learning, advocates use the term interactivity instead of interaction among students, and between the teacher and the students. Many universities use Moodle for online teaching and learning. This paper explores the perceptions and experiences of students in three Higher Education Institutions (HEIs) in Mauritius. A mixed-methods approach was used, with an online survey questionnaire administered to 600 students and focus group discussions were conducted with 15 students from these institutions. It was found that 68.4% of respondents used WhatsApp compared to only 23.6% of them who used the e-learning platform, Moodle. There were no associations between the use or frequency of using WhatsApp or Facebook and the types of HEI to which the students belonged. Students preferred WhatsApp due to its facility for knowledge sharing and construction, its interactivity, its usability, respect for privacy and instant communication. From the findings, it is recommended that HEIs bring a shift in their approaches to teaching and learning from cognitivism to socio-constructivism, connectivism and heutagogy.
Volume: 9
Issue: 4
Page: 833-839
Publish at: 2020-12-01

Recognizing emotional state of user based on learning method and conceptual memories

10.12928/telkomnika.v18i6.16756
Maytham N.; Razi University Meqdad , Fardin; Razi University Abdali-Mohammadi , Seifedine; Beirut Arab University Kadry
With the increased use of computers, electronic devices and human interaction with computer in the broad spectrum of human life, the role of controlling emotions and increasing positive emotional states becomes more prominent. If a user's negative emotions increase, his/her efficiency will decrease greatly as well. Research has shown that colors are to be considered as one of the most influential basic functions in sight, identification, interpretation, perception and senses. It can be said that colors have impact on individuals' emotional states and can change them. In this paper, by learning the reactions of users with different personality types against each color, communication between the user's emotional states and personality and colors were modeled for the variable "emotional control". For the sake of learning, we used a memory-based system with the user’s interface color changing in accordance with the positive and negative experiences of users with different personalities. The end result of comparison of the testing methods demonstrated the superiority of memory-based learning in all three parameters of emotional control, enhancement of positive emotional states and reduction of negative emotional states. Moreover, the accuracy of memory- based learning method was almost 70 percent.
Volume: 18
Issue: 6
Page: 3033-3040
Publish at: 2020-12-01

Strategies for use, treatment, management and final disposition of wastes in academic laboratories

10.12928/telkomnika.v18i6.14506
Vladimir Gaviria; Institución Universitaria Colegio Mayor de Antioquia González , Fredy Edimer Hoyos; Universidad Nacional de Colombia Velasco , John E.; Universidad Nacional de Colombia Candelo-Becerra
Laboratory higher education institutions can generate a wide range of wastes,many of which have hazardous characteristics. The uncontrolled accumulation of such wastes also has a significant impact on the environment, safety and health of the academic community. This work formulates strategies that allow the development of integrated solutions to mitigate the latent risk for the community at Institución Universitaria Colegio Mayor de Antioquia,Colombia, and its surroundings. Therefore, it is considered to quantify the generation of waste in the units of analysis of different experimental spacesand evaluate the factors involved in the implementation of strategies for diagnosis, waste recovery, treatment, and final disposition. Based on the diagnosis and characterization of wastes, alternatives are evaluated that help to prevent and, in other cases, mitigate the impacts that they can cause, in order to consolidate a protocol for waste management. Hazardous waste disposition strategies, treatment mechanisms and minimization strategies, such as microchemistry, precipitation recycling, encapsulation and immobilization methods, evaporation as well as solvent recovery, have been implemented.
Volume: 18
Issue: 6
Page: 3130-3141
Publish at: 2020-12-01

A novel pooling layer based on gaussian function with wavelet transform

10.11591/ijeecs.v20.i3.pp1289-1298
Aqeel M. Hamad alhussainy , Ammar D. Jasim
Convolution represent basic layer in the convolutional neural network, but it can result in big size of the data, which may increase the complexity of the network. Different pooling methods are used to perform down sample these data. In this paper, we have proposed a novel pooling method by using Gaussian function to determine the wavelet filter coefficients. At first, the basic statistics are determined for each pool size of the signal, then Gaussian probability distribution function is determined. According to the procedure of extracting the features, three methods are proposed, the first method is used the normalized values of basic statistics as wavelet filter to be multiplied by original signal, the second method used the determined statistics as features of the original signal, then multiplied it with constant wavelet filter based on Gaussian, while the third method is similar to first method, except it depend on entire signal instead of each pool size. The proposed methods are combined with other standard methods such as max and pooling. The experiments are performed on different datasets and the results show that the proposed methods perform or outperform other methods and can increase performance of the (CNN).
Volume: 20
Issue: 3
Page: 1289-1298
Publish at: 2020-12-01

An improved swarm intelligence algorithms-based nonlinear fractional order-PID controller for a trajectory tracking of underwater vehicles

10.12928/telkomnika.v18i6.16282
Mustafa Wassef; university of Baghdad Hasan , Nizar Hadi; university of Baghdad Abbas
This paper presents a nonlinear fractional order proportional integral derivative (NL-FOPID) for autonomous underwater vehicle (AUV) to solve the path tracking problem under the unknown disturbances (model uncertainty or external disturbances). The considered controller schemes are tuned by two improved swarm intelligence optimization algorithms, the first on is the hybrid grey wolf optimization with simulated annealing (HGWO-SA) algorithm and an improved whale optimization algorithm (IWOA). The developed algorithms are assessed using a set of benchmark function (unimodal, multimodal, and fixed dimension multimodal functions) to guarantee the effectiveness of both proposed swarm algorithms. The HGWO-SA algorithm is used as a tuning method for the AUV system controlled by NL-FOPID scheme, and the IWOA is used as a tuning algorithm to obtain the PID controller’s parameters. The evaluation results show that the HGWO-SA algorithm improved the minimal point of the tested benchmark functions by 1-200 order, while the IWOA improved the minimum point by (1-50) order. Finally, the obtained simulation results from the system operated with NL-FOPID shows the competence in terms of the path tracking by 1-15% as compared to the PID method.
Volume: 18
Issue: 6
Page: 3173-3183
Publish at: 2020-12-01

Proportional-integral genetic algorithm controller for stability of TCP network

10.11591/ijece.v10i6.pp6225-6232
Mohammed Qasim Sulttan , Manal Hadi Jaber , Salam Waley Shneen
The life development and increase the number of internet users imposed an increase in data circulating on the internet network and then make the network more congestion. As a result of all this, some problems arose such as time delay in packets delivery, loss of packets, and exceed the buffer capacity for the middle routers. To overcome those problems, transmission control protocol and active queue management (TCP/AQM) have been used. AQM is the main approach used to control congestion and overcome those problems to improve network performance. This work proposes to use the proportional-integral (PI) controller with a genetic algorithm (GA) as an active queue manager for routers of the Internet. The simulation results show a good performance for managing the congestion with using proportional-integral genetic algorithm (GA-PI) controller better than the PI controller.
Volume: 10
Issue: 6
Page: 6225-6232
Publish at: 2020-12-01

Stability and chaos with mathematical control of 4-D dynamical system

10.11591/ijeecs.v20.i3.pp1242-1251
Maysoon Mal-Allah Aziz , Dalya M. Merie
A new four-dimensional continuous-time system is dealt in this paper. The system employs eight simple terms involving two quadratic cross-product nonlinear terms. The fundamental characteristics of the system are analyzed by means of equilibrium points, stability analysis, dissipativity, wave form analysis, Lapiynuov Exponents and Kaplan-Yorke dimension. The maximum value of Lapiynuov exponent is obtain as (1.660748) andKaplan Yorke dimension obtain as (), that show the system is unstable and highly chaotic. As well, an optimal controller by adaptive control strategy is established to be system trajectories are stable. Finally, Adaptive synchronization of system (1) is clarified. Tables are made to compare the theoretical and graphical results of the system before and after control.
Volume: 20
Issue: 3
Page: 1242-1251
Publish at: 2020-12-01

Potentials of solar power plant in Waru Tua

10.12928/telkomnika.v18i6.15763
Ain; Sekolah Tinggi Teknologi Minyak dan Gas Bumi Balikpapan Sahara , Riza Hadi; Sekolah Tinggi Teknologi Minyak dan Gas Bumi Balikpapan Saputra , A. M. Miftahul; Sekolah Tinggi Teknologi Minyak dan Gas Bumi Balikpapan Huda
Penajam Paser Utara Regency is located on the coast of East Kalimantan Province. This regency has a huge solar resource potential, but the agreement in this regency still lacks electricity networks and can be resolved by the people in this regency still in dire need of electricity for street lighting, and daily electricity needs. One of them is in the village of Waru Tua, where this area is in great need of lighting in the dock area because it requires residents to make Aliving as a fisherman. Waru Tua really needs electricity for lighting at night Waru Tua Pier because it has to be a gathering place for residents before going to sea to prepare everything that must be prepared before going to sea. Discussing the research carried out examining the potential of solar power in Waru Tua. Based on existing considerations, and the potential proposed by the area, the method used is to measure the sunlight at Waru Tua Pier using Luxmeter, then the data is processed using the Simulink applicationin MATLAB to obtain the value of the amount of sunlight in the area, which is 16 KW with a total solar cell of 250 Wp.
Volume: 18
Issue: 6
Page: 3266-3275
Publish at: 2020-12-01

Optimization of detection of a single line to ground fault based on ABCNN algorithm

10.11591/ijai.v9.i4.pp623-629
Feryal Ibrahim Jabbar , DurMuhammad Soomro , Adnan Hasan Tawafan , Mohd Noor bin Abdullah , Nur Hanis binti Mohammad Radzi , Mazhar Hussain Baloch
One of the most faults found in the electrical distribution network is a single line to ground fault (SLGF). It can be detected and rectified through many methods. The utilization of Peterson coil (PC), reduces the electrical arcs and make the distribution network safe from damage in contrast to the cost value. This paper focuses on the method for its detection on higher and lower values of the ground fault current (GFC). Moreover, it will identify the capacitance and earth leakage of earthling network lines as well as calculate the opposing inductance to compensate for the cause. It also presents the selfextinguishing of GFC by controlling PC through one of the novel optimization techniques called adaptive and artificial bee colony with network neural (ABCNN) to improve the algorithm's performance, like optimization efficiency, speed, solution, and iteration. As a result, the determination of the GFC equals the sound phase current. Also, the extinguishing of an electric arc results in a short time compared with classical methods. The significant advantage of this research is the increment in the system's reliability, protection of devices as well as saving in copper cost. MATLAB was used to carry out this research. For the validity, the proposed algorithm results were compared with the classical method by creating faults on separate phases also.
Volume: 9
Issue: 4
Page: 623-629
Publish at: 2020-12-01

Enhance the chromatic uniformity and luminous efficiency of WLEDs with triple-layer remote phosphor structures

10.11591/ijece.v10i6.pp6244-6250
Nguyen Thi Phuong Loan , Anh Tuan Le
The angular color uniformity (ACU) with the ability to evaluate chromatic performance of WLED has become an important target to achieve in producing higher-quality WLEDs. This paper studies the ACU enhancing effects of novel triple-phosphor configuration in lighting devices with remote phosphor structure. Moreover, the optical influences of remote phosphor structure with three phosphor layers (TL) on WLEDs properties are calculated and compared to the dual-layer (DL) one for reference. The experiments are applied to devices at 5 distinct correlated color temperature ranging from 5600-8500 K. The results presented that DL structure attains better color rendering index (CRI) than the TL one. Meanwhile, in terms of color quality scales (CQS), TL model shows higher values at all ACCTs, compared to the DL. Moreover, the luminous flux of DL configuration is lower than that of TL structure. In addition, the diversion of color temperature depicts as D-CCT in TL structure is much better than the value in DL structure, especially at high ACCT as 8500 K, which means TL is good for chromatic uniformity of high ACCTs WLEDs. These results proved that the triple-layer structure is superior and more effective to apply for acquiring the enhancement of WLEDs package.
Volume: 10
Issue: 6
Page: 6244-6250
Publish at: 2020-12-01

An educational game on the theories of driver education curriculum: An evaluation

10.11591/ijere.v9i4.20659
Zainab Othman , Nurul Hidayah Mat Zain , Ismassabah Ismail , Sharifah Affandi , Nor Azida Mohamed Noh , Anita Mohd Yasin
The purpose of this study was to evaluate the effectiveness of using an educational game application among driving school students on their understanding of driving rules and regulations. The application was developed and named as An Educational Game on the Theories of Driver Education Curriculum (DEC) to help students improve their visualization, understanding and memorization of the theories of driving rules and regulations as well as to be more prepared before taking the driving theory test. A preliminary study was conducted and it indicated that students had a hard time in visualizing, understanding and memorizing the theories of driving. The Game Development Life Cycle (GDLC) was implemented as a methodology to develop the DEC application which consists of initiation, pre-production, production, testing, beta, and release phases. The effectiveness of the DEC application was measured by Game-Based Learning Evaluation Model (GEM). The findings indicated that educational game helped students to visualize, memorize and understand the theories of driving easily.
Volume: 9
Issue: 4
Page: 1088-1095
Publish at: 2020-12-01

Non-independent speed control for dual-PMSM drives fed by a single three-leg VSI

10.11591/ijeecs.v20.i3.pp1717-1724
Jurifa Mat Lazi , Zulkifilie Ibrahim , Md Hairul Nizam Talib
The objective of this article is to analyze the performances of non-independent speed control of dual-pmsm (permanent magnet synchronize motor) drives by a single three-leg voltage source inverter (VSI) using control of mean and differential torque technique. In general, there are two types of control strategies for dual-motor drives. One is master-slave technique and another one is mean control technique. For mean control technique, this study chooses mean and differential approach for the motors parameters and using average value for the voltage space vector. The advantages of dual-motor drives fed by a single inverter topology are, it can decrease the size and cost compared to the dual-motor drives which used by individual inverter, either in industrial or in traction applications. However, by using a single three-phase inverter, the topology only restricted for the same operating conditions which are at the same speed, same parameters and same direction. The dual-motors are dependent (non-independent) on the other motor. It is can only be tested on different load operation. The analysis is focuses on speed and load variation for dual-PMSM drives considering the forward and reverse operations of the motor. This simulation model is modelled using MATLAB-Simulink.
Volume: 20
Issue: 3
Page: 1717-1724
Publish at: 2020-12-01

Striving for the brighter future: An experience of high school students as earthquake victims

10.11591/ijere.v9i4.20709
Rose Mini Agoes Salim , Kusumasari Kartika Hima Darmayanti
High school students’ experienced negative emotions caused by the earthquake that strucked Sigi District, Central Sulawesi, Indonesia. In addition to overcoming negative emotions, they were faced with deciding on a career decision. For this reason, this research aimed to determine the effect of Future Time Perspective (FTP) on Career Decision Self-Efficacy (CDSE) of 141 students from six high schools. Simple regression indicated that FTP positively affected the CDSE of high school students. Moreover, using multivariate regression analysis on FTP and five dimensions of CDSE, we found that FTP contributes positively and significantly to the five dimensions of CDSE. Therefore, the research implied that FTP based intervention program is able to promote CDSE.
Volume: 9
Issue: 4
Page: 887-895
Publish at: 2020-12-01

Guiding principles and practices of peace education followed in secondary schools of Mizoram

10.11591/ijere.v9i4.20738
Lokanath Mishra , Tushar Gupta , Abha Shree
The significance of peace education is universally recognized for a safe and prospering future for the world at school level as peace education aims at equipping the future citizens with necessary knowledge, attitude and skills so that they would acknowledge and respect all kinds of diversity and understand human dignity. This paper is based on an empirical research aiming how far guiding principles and practices of peace education followed in secondary schools of Mizoram. The concept of peace education, guiding principles of peace education and practices on peace-related activities being followed in the secondary schools of Mizoram were explored. The study revealed that peace education was not being taught as a separate subject. Peace education component was infused in the existing curriculum and also was being taught through co-curricular and extra-curricular activities. Besides, teachers must reflect in their behavior all the guiding principles of peace. They should encourage the students for critical thinking, reasoning, develop awareness on societal problems and issues, broaden their outlook, concentrate on studies, and to be associated with various activities. In Mizoram, students’ unions and church organizations used to play a prominent role in shaping and moulding the character of the people starting from the early stage of life which ultimately benefits the society and the nation. However, in the context of rapid change in social structure and modernization process, there is need for inculcating the values of peace for which schools have to play important role.
Volume: 9
Issue: 4
Page: 1096-1101
Publish at: 2020-12-01

A miniaturized printed UWB antenna with dual notching for X-b and and aeronautical radio navigation applications

10.12928/telkomnika.v18i6.16119
Mohammad Ahmad; Palestine Polytechnic University Salamin , Sudipta; IMPS College of Engineering and Technology Das , B. T. P.; Koneru Lakshmaiah Education Foundation Madhav , Soufian; Mohammed V University in Rabat Lakrit , Avisankar; Haldia Institute of Technology Roy , Asmaa; Abdelmalek Essaâdi University Zugari
A low cost miniaturized UWB microstrip antenna with dual notched band for X band and aeronautical radio navigation (ARN) is presented in this article. The antenna (19 16×"> 25 mm2) is composed of a half-circular ring as a radiation patch with an incomplete ground plane. The measured results indicate a fractional bandwidth of 112% for 16S11≤-"> 10 dB between 3 to 10.6 GHz. The dual notched band has been achieved by incorporating window shaped microstrip closed ring resonators at the rear surface of the designed structure. The first notch band is centered at 7.5 GHz (7 8.1 GHz) to reject interference with X-band downlink (7.25 to 7.74 GHz) and second band centered at 9.1 GHz (8.6 9.4 GHz) to reject interference with aeronautical radio navigation (ARN) (8.7 to 9.2 GHz). The simulated and measured return loss, radiation pattern, and gain shows good agreement which confirms the applicability of the designed antenna for the intended UWB applications.
Volume: 18
Issue: 6
Page: 2868-2877
Publish at: 2020-12-01
1 2 3
...
2097 2098
Show 1152 of 2098

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