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

31,377 Article Results

Differences in the impact of harmonic distortion due to the installation of electronic load controller in self-excited induction generator and synchronous generator

10.11591/ijpeds.v10.i1.pp104-116
Refdinal Nazir , Syafii Syafii , Andi Pawawoi , Fajril Akbar , Axel Doriza
In general, the application of Self-Excited Induction Generator (SEIG) or Synchronous Generator (SG) on the Stand-Alone Micro Hydel Power Plant (MHPP) is equipped with Electronic Load Controller (ELC) to control generator output during variations in consumer load. One type of ELC that is cheap and rigid developed today is the ELC, which is constructed by the uncontrolled bridge rectifier with DC Chopper. Based on the operational concept, basically this type of ELC can be implemented on both SEIG and SG, but both of these generators will have a different harmonic distortion effect on the output and its load. This paper examines the differences in the effects of harmonic distortions due to ELC installation on SEIG and SG. The initial stage of this study was to design the ELC developed. Then, the harmonic distortion response due to the installation of ELC on SEIG and SG is tested, which includes harmonic distortion in: stator current, PCC voltage, and consumer load current. THDI (Current Total Harmonic Distortion) stator current at SEIG with ELC has shown an average value smaller than the THD stator current in SG with ELC. Likewise, the THDV (Voltage Total Harmonic Distortion) value of PCC voltage and THDI value of the current consumer load on SEIG equipped with ELC has been shown to be smaller than the THDV value of PCC voltage and THDI value of the current consumer load on SG equipped with ELC. The effects of harmonic distortions due to the installation of ELCs that developed in this study on SEIG is still within the permitted limits, while on the SG, the harmonic distortion reduction is needed at the generator output.
Volume: 10
Issue: 1
Page: 104-116
Publish at: 2019-03-01

Development of preschool social emotional inventory for preschoolers: a preliminary study

10.11591/ijere.v8i1.17798
Goh Wah Im , Yeo Kee Jiar , Rohaya Bt. Talib
Social-emotional competencies have been established as important predictors in children’s mental health, school readiness and academic success. Age and developmentally appropriate screening for preschool children is important for early detection of developmental delays and early intervention. The purpose of this study is to measure preschool children’s social emotional competencies (SEC) based on the Malaysian context using the Preschool Social Emotional Competency Inventory (P-SECI) developed to provide parents, teachers and childcare professionals with a standardized, norm-referenced, reliable and valid instrument.  A pool of 50 items were created for P-SECI, representing eight clusters of social emotional competencies in children: self-awareness, social awareness, self-management, relationship management, attachment, communication, responsible decision making and pro-social skills. This pilot study involved two public Annex preschools in Johor Bahru, purposely selected with 49 preschool children as respondents. Results showed that P-SECI has a high reliability index (Alpha Cronbach-Teachers .98 and Parents .95). Initial findings also showed that Teachers and Parents differ in their evaluation of their children’s SEC according to age and gender. But for the age criteria, the mean difference is slightly wider in comparison to gender. Therefore, P-SECI is relevant in predicting children’s mental health, school readiness and academic achievement. Results from the study also showed that the inventory holds promise as a reliable and valid instrument to evaluate SEC in young children according to the Malaysian context.
Volume: 8
Issue: 1
Page: 158-164
Publish at: 2019-03-01

Intrinsic motivations for productive ageing

10.11591/ijeecs.v13.i3.pp1228-1236
Norisan Abd Karim , Haryani Haron , Natrah Abdullah , Wan Adilah Wan Adnan , Sharifah Muzlia Syed Mustafa
The involvement of the elderly in the activities is low compare to younger adult due to their frailty. This paper presents intrinsic motivations for productive ageing where it highlights the factors that motivate the elderly to participate in the activities. There are thirteen elderly respondents came from the people in the urban Klang Valley. The qualitative data analysis approach is used in this study. There are five intrinsic factors, which, consist of Autonomy, Competence, Relatedness, Curiosity and Altruism that motivate the participation of the elderly in volunteering, caregiving and self-development activities in this study. This research focuses on activities that resulted intrinsic values and not on monetary value like most of past researchers. Intrinsic motivation features are significant features in ICT as the identification of the ICT features is based on motivation to use the ICT.
Volume: 13
Issue: 3
Page: 1228-1236
Publish at: 2019-03-01

The presence and persistence of entrepreneurship education In Indonesia: a cross sectional study

10.11591/ijere.v8i1.16528
Ambara Purusottama , Teddy Trilaksono
This study aims to improve an understanding of the contribution of entrepreneurship education (EE) in Indonesia’s higher education. Even though the contribution of EE to global education is contested at the present time by many scholars, the evaluation of EE implementation in Indonesia is necessary in order to improve educated entrepreneurs. The study used a cross-sectional approach in the Universitas Prasetiya Mulya which is divided into the first, second, and third years. Valid questionnaire reached 924 respondents. The findings show that EE's contribution in Indonesia has more influence on attitudes and perceived behavioral control. However, other findings indicate that the contribution of EE is still not fully persistent due to a sharp decline in the regression coefficient, especially from subjective norm and perceived behavioral control in the students third year while attitude consistently contributes significant role and has an increasing contribution.
Volume: 8
Issue: 1
Page: 71-80
Publish at: 2019-03-01

Speech intelligibility enhancement for Thai-speaking cochlear implant listeners

10.11591/ijeecs.v13.i3.pp866-875
Siriporn Dachasilaruk , Niphat Jantharamin , Apichai Rungruang
Cochlear implant (CI) listeners encounter difficulties in communicating with other persons in noisy listening environments. However, most CI research has been carried out using the English language. In this study, single-channel speech enhancement (SE) strategies as a pre-processing approach for the CI system were investigated in terms of Thai speech intelligibility improvement. Two SE algorithms, namely multi-band spectral subtraction (MBSS) and Weiner filter (WF) algorithms, were evaluated. Speech signals consisting of monosyllabic and bisyllabic Thai words were degraded by speech-shaped noise and babble noise at SNR levels of 0, 5, and 10 dB. Then the noisy words were enhanced using SE algorithms. The enhanced words were fed into the CI system to synthesize vocoded speech. The vocoded speech was presented to twenty normal-hearing listeners. The results indicated that speech intelligibility was marginally improved by the MBSS algorithm and significantly improved by the WF algorithm in some conditions. The enhanced bisyllabic words showed a noticeably higher intelligibility improvement than the enhanced monosyllabic words in all conditions, particularly in speech-shaped noise. Such outcomes may be beneficial to Thai-speaking CI listeners.
Volume: 13
Issue: 3
Page: 866-875
Publish at: 2019-03-01

MPPT using novel FLC based MPO for photovoltaic system

10.11591/ijra.v8i1.pp26-35
R. Arulmurugan
In this paper introduces a novel Fuzzy Logic Controller (FLC) as a Maximum Power Extracting (MPE) of photovoltaic standalone system is proposed, which can handle the uncertainties of the rules under high deviations in climate conditions. Conventional Perturb and Observe (P & O), hill-climbing MPE structures are examined. The MPE employed boost converter controller. The new controller improves P & O based maximum power tracker search method by rules fuzzifying of such method and eliminates the conventional drawback. A new FLC based improved P & O offers an accurate and fast converging to MPE during steady state and changing climatic situation compared to existing P & O and hill climbing method. The performance of the designed MPE is demonstrated in simulation MATLAB at dissimilar operating circumstances.
Volume: 8
Issue: 1
Page: 26-35
Publish at: 2019-03-01

Designing lesson plan of integer number operation based on fun and easy math (FEM) approach

10.11591/ijere.v8i1.15514
Darin Fouryza , Siti Maghfirotun Amin , Rooselyna Ekawati
This paper dealt with the design of learning tools, that was the development of learning implementation plan or Rencana Pelaksanaan Pembelajaran (RPP) based on Fun and Easy Math (FEM) approach in the form of a number line model. FEM was an approach in order to teach mathematics effectively to students in a fun and easy way according to the patterns and rules, making it easier for students to understand mathematical concepts and driving them to actively participate in learning activity. Furthermore, the number line model based on the rules aimed to provide the real idea of mathematical concept and avoid the mathematical manipulation. The design of RPP development was intended to create a new RPP which was divided into three activities, namely introduction, core, and closing. The method of lesson plan development used a Plomp’s development model which was consisted of three phases, namely preliminary research, prototype, and evaluation. The results of this development were expected to help students in understanding the mathematical concepts, namely integer calculation operations especially addition and subtraction, increasing student activeness in learning process, and avoiding the existence of mathematical manipulation.
Volume: 8
Issue: 1
Page: 103-109
Publish at: 2019-03-01

Good teacher perceptions of students attending the pedagogical formation certificate program

10.11591/ijere.v8i1.17093
Zeynep Ayvaz-Tuncel , İbrahim Tuncel
A pedagogical formation certificate is required to become a teacher in secondary schools in Turkey. This certificate program, which is required to obtain in addition to a bachelor’s degree from any faculty other than the education faculties, aims at providing the knowledge, capabilities and attitudes required by the profession of teaching. This study aims at determining the perceptions of prospective teachers attending the pedagogical formation program about the properties of a good teacher. Data were collected using a survey comprising an open-ended question and content analysis was conducted to obtain the themes in this study, which adopted a descriptive method. Based on the properties of a good teacher, expressed by the prospective teachers, the themes “personal characteristics”, “enforcement of teaching process”, “establishing a democratic classroom environment” and “assessment and evaluation” are obtained.
Volume: 8
Issue: 1
Page: 165-172
Publish at: 2019-03-01

Design of one non-linear adaptive control system and study of its tracking

10.11591/ijra.v8i1.pp1-5
Samiran Maiti , Achintya Das
In this paper, an adaptive control method is proposed for a category of nonlinear systems. As the to begin with step in versatile controller plan, we select the control law which containing variable parameters. At that point select an adaption law for adjusting those parameters. We analyze the convergence properties and system stability using Lyapunov theory. The viability of the proposed approaches is appeared by implies of recreation on MATLAB.
Volume: 8
Issue: 1
Page: 1-5
Publish at: 2019-03-01

Cyberbullying among secondary school teachers by parents

10.11591/ijere.v8i1.16549
Rüyam Küçüksüleymanoğlu
Cyberbullying which is known as violence on the Internet is a dimension of peer bullying takes places through electronic communication technologies. Cyberbullying which can occur in any environment regardless of the time and place is the way in which individuals with higher ability to use communication technologies to lead other individuals in a series of negative behaviors over time. With the rapid development of technology and the ease with which internet access becomes easier and cheaper, it becomes a problem that needs to be studied more and more importantly day by day. Facebook, twitter and whatss up, the most widely used social network today, has the potential to become the most commonplace for cyberbullying behaviors. The purpose of this study was to determine cyberbullying towards teachers by parents in secondary schools based on teachers views according to sex, tenure and school size. The sample of the study was 181 teachers from 14 secondary schools. The experiences and perspectives of 181 teachers were assessed regarding the incidence and perceptions of the likelihood of cyber harassment by parents. The results presented here indicate that nearly3/4 of teachers in the sample had received harassing or threatening messages from parents.
Volume: 8
Issue: 1
Page: 151-157
Publish at: 2019-03-01

Fifth graders' perceptions of mobile phones and GIS technology

10.11591/ijere.v8i1.16246
Adiv Gal
The era of M-learning, specifically the use of mobile phones, has been hardly noticeable in elementary schools. GIS technology is also rarely implemented there. In this study, 5th grade students' perceptions of the use of GIS technology through mobile phones were examined as part of an environmental education program designed to help preserve endangered species. The results show that the students provided special, valuable, critical and mature perspectives on the advantages and disadvantages of using mobile phones as part of the innovative pedagogy they apply in school. The use of the mobile phone and the new application as part of M-Learning made it easier for most students to create authentic learning, that is, learning focused on problems in the real world, and included a project of relevance and interest to the learners. The process of learning through mobile phones and GIS technology, which combined the creative use of teaching methods unfamiliar to students, focused on and was adapted to the learners' abilities, offering a diagnosis and constructive guidance based on success and community. In conclusion, 5th grade students testified that their elementary school could enter the M-Learning era by integrating mobile phones and adopting a student-centered learning approach.
Volume: 8
Issue: 1
Page: 81-89
Publish at: 2019-03-01

A new method for handoff target network selection

10.11591/ijra.v8i1.pp36-43
Jyoti Madaan , Sunanda Gupta , Pratima Manihas
In wireless communications of fourth generation the expectation to assimilate a hypothetically numerous heterogeneous wireless technologies are happened under consideration of a novel step toward worldwide smooth access. The advancement in wireless networks increases the challenges of mobility management as well the challenges of merging a various number of wireless networks. Out of those the main challenge for smooth movement is the accessibility of consistent vertical (intersystem) and horizontal (intra-system) handoff processes. So to improve the quality of service and to provide always best connected services all the time, the handoff decision algorithm must select an optimum target network from the available candidate networks. The purpose of this paper is to provide a mechanism for selecting an optimum target network from the available networks. This method is devised for maximizing the user satisfaction level, by selecting the “best” network as the handover target network among multiple candidate networks.
Volume: 8
Issue: 1
Page: 36-43
Publish at: 2019-03-01

Occupational anxiety and self-efficacy levels among prospective teachers

10.11591/ijere.v8i1.18213
Şule Fırat Durdukoca , Tazegül Demir Atalay
This study examined the relationship between occupational anxiety and self-efficacy levels of prospective teachers enrolled in pedagogical formation training certificate program at the faculty of education in universities under the Council of Higher Education to teach in secondary schools and high schools in Turkey, and evaluated them based on diverse variables (gender, department, high school type, educational level of parents). It was a descriptive study using survey model. The study group comprised 236 prospective teachers. Research data were gathered through “Teaching Occupation Anxiety Scale” and “Teachers’ Sense of Efficacy Scale”. The study concluded that the prospective teachers’ anxiety about the teaching profession was low, whereas they had high occupational self-efficacy, and there was a moderate, negative relationship between the two variables. The study also found that occupational self-efficacy levels of the participants differed in relation to the educational level of father.
Volume: 8
Issue: 1
Page: 173-180
Publish at: 2019-03-01

Evaluating gender-based mobile shopping application using eye-tracking technology

10.11591/ijeecs.v13.i3.pp1095-1101
Aslina Baharum , Emelia Abdul Rahim , Rozita Hanapi , Noorsidi Aizuddin Mat Noor , Nurhafizah Moziyana Mohd Yusop
The mobile applications (apps) development has been gaining popularity for the past few years. Some mobile apps have been failing in its popularity because of the unattractive user interface and bad interaction with the apps. This was proven by previous researchers who have stated that the interaction between a user of mobile application and a graphical user interface could lead to some misunderstandings, errors and frustration from an inability to achieve a goal and could lead to failure of the mobile application. Most of the mobile application developers have been facing proper graphical user interface design recently. There is a noticeable lack of studies and research in the area of mobile application design compared to web application user interface (UI) design. Therefore, this research was done to evaluate the different gender on the mobile shopping application using eye-tracking technology. This research had proposed guidelines based on gender for mobile shopping application. These proposed guidelines can be preferred in the designing process of a mobile shopping application as it could provide a better user interaction and would prevent failure in its popularity by providing fast and user friendly interface.
Volume: 13
Issue: 3
Page: 1095-1101
Publish at: 2019-03-01

Health status and physical activity among academic and non academic staffs in higher education

10.11591/ijere.v8i1.17738
Nurul Qomariyah , Sitti Nur Djannah
Being physically active is reducing the risk of non-communicable diseases. A cross sectional mixed method study was conducted to analyze health status and explore supporting and inhibiting factors of physical activity among academic and non academic staff in higher education. A total of 83 respondents were met the inclusion and exclusion criteria. The majority of UAD staffs are physically active and overweight. No significant health problems are found. Individual, social and environmental factors are identified as factors that can support and inhibit physical activity. Policies at the Faculty and University level are needed as well as cross-sectoral collaboration with related parties to support physical activities in UAD.
Volume: 8
Issue: 1
Page: 97-102
Publish at: 2019-03-01
1 2 3
...
2091 2092
Show 1430 of 2092

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