Here, we report high output piezoelectric voltage generation from oxidized ZnO nanowires (100nm). Periodic high output voltage peaks were observed during series of oxygen exposure experiments. Gradual rise in piezoelectric potential from oxidized ZnO nanowires is being evidenced for the very first time. Sharp voltagepeaks 464mV, 803mV, 1.354 V, 1.795V and 2.44V are observed for an exposure of oxygen for 1h, 2h, 3h, 4h and 5h respectively in a sealed chamber at 50ppm. Ithas been observed maximum output value has been saturated after 5h of O exposure. Enhanced piezoelectric potential appearing at output stages is due to the adsorption of oxygen molecules on long ZnO nanowires, giving rise to “Edge Effects” and consequently reducing reverse leakage current through nanowires and enhancing output voltage. SEM images revealed the surface morphology ZnO nanowires, diameter range was found around 100nm. XRD pattern verified vertical growth orientation of ZnO nanowires on ITO (indium Tin o.....

923 hits

Here, we report the adsorption effect of NO2 on ZnO (100 nm) nanowires. We have studied the effect of adsorbed NO2 molecules on ZnO nanowire-based energy harvester for an exposure time of 1, 2, 3, 4, 5 and 6 h in a sealed chamber at 50 ppm which yielded piezoelectric voltage of 543.6 mV, 834.6 mV, 1.071 V, 1.78 V, 1.969 V and 2.835 V, respectively. We have thoroughly investigated the behaviour of ZnO nanowires in the presence of NO2 and observed a maximum output piezoelectric voltage of 2.835 V with a power density 158.2 mW cm-2. This is the first time that ZnObased piezoelectric energy harvester is being used for the voltage enhancement in the presence of NO2. We have used vertically integrated nanowire generator (VING) structure. X-ray diffraction pattern revealed the growth orientation of ZnO nanowires were along the c-axis from the substrate. ZnO nanowires were grown on indium tin oxide-coated polyethylene terephthalate substrates via a hydrothermal route. Surface morphology has be.....

893 hits

This article aims to delve into the process of designing the Learning and Facilitation (PdPC) module of the Nationhood Studies course in the 21st Century Learning concept. This course aims to foster the spirit of patriotism and self-esteem among students. Literature studies show that 21st Century education has a positive impact on student attitude, motivation, and mastery of knowledge and is not solely focused on facts and theory. In addition, this educational transformation involving the 21st Century learning process has received parental support. It is arguable that 21st Century learning is a transformation that is being made to renew existing education standards to make the education system more flexible, creative, challenging and more complex. Therefore, the development of this module is essential to achieve that aspiration. To develop a systematic module, this study uses the ADDIE model introduced by Dick & Carry (1996). The process of designing this module is described in detail .....

1688 hits

This study aims to investigate the impact of active learning in the economics subject in Perak secondary school on students’ achievement, motivation, interest, and social interaction. This study applies a quasi-experimental research design, which involves the control and the treatment groups with thirty and thirty-four participants, respectively. The active learning materials for the treatment group were based on active learning methods provided by the Ministry of Education with support from structured lesson plans namely: simulations, discussions, brainstorming, case studies, and visits in the school’s compound. A questionnaire is also used to measure students’ motivation, interest and social interaction before and after the intervention. The results showed that students who had experienced active learning activities score higher than their counterparts significantly for topic 1 and 2. Besides, findings show that they were motivated and interested in learning economics through a.....

1458 hits

The main aim of this article is to present recent results concerning diagonal implicitmultistage integration methods (DIMSIMs) with extrapolation in solving stiff problems. Implicit methods with extrapolation have been proven to be very useful in solving problems with stiff components. There are many articles written on extrapolation of Runge-Kutta methods however fewer articles on extrapolation were written for general linear methods. Passive extrapolation is more stable than active extrapolation as proven in many literature when solving stiff problems by the Runge-Kutta methods. This article takes the first step by investigating the performance of passive extrapolation for DIMSIMs type-2 methods. In the variable stepsize and order codes, order-2 and order-3 DIMSIMs with extrapolation are investigated for Van der Pol and HIRES problems. Comparisons are made with ode23 solver and the numerical experiments showed that implicit DIMSIMs with extrapolation has greater accuracy than the met.....

2087 hits

The government through the Ministry of Education Malaysia promotes the use of technology in the teaching and learning practices among teachers as medium to connect and supports e-learning activities between students and teachers. Accordingly, this study aimed to explore teachers’ usage of virtual learning environment, assess teachers’ teaching preferences and ICT skills as well as examine the effect of teachers’ self-efficacy towards the use of virtual learning environment. The study used survey methods to collect data. The respondents of the study were selected using a purposive sampling method. 156 accounting teachers from schools in Perak, Kedah and Selangor were selected as the sample. Data were analyzed using descriptive analysis that measured mean values, percentages, frequency and standard deviations. Inference tests involving Pearson Correlation was used to analyze relationships between variables. The findings revealed that teachers tend to favor modern/contemporary learn.....

1088 hits

This systematic literature review papernexplores the importance of embedding accounting teachers' professional identity concept in the Indonesian education system particularly in teacher education. The Indonesian government is still struggling to enhance teacher professionalism; thus, many training pieces have been developed to overcome teachers' low quality. However, the teacher’s competency in Indonesia is still behind the other countries implied in the PISA score, indicating a missing link in teacher education. The professional identity has attracted scholars in various fields to define the meaning of professional identity and develop it in an individual. The particular definition of accounting teacher professional identity is still not studied. Therefore, exploring previous studies in professional identity to identify teacher professional identity is needed. In the accounting teacher context, the paper proposes to combine two professional identity formations from teacher and acco.....

1107 hits

This article discusses the analysis of water supply acceptance and adequacy among flood victims at the Kuala Krai Temporary Evacuation Centres (TECs) in Kelantan, Malaysia. This study applied a quantitative approach using questionnaire. A total of 300 flood victims were randomly selected. The aspects being measured were the types of water resource acceptance as well as the adequacy of water supply according to four main types of domestic activities at the TECs, namely drinking, cooking, bathing and washing. The analysis used was descriptive analysis, a cross-tabulation test to assess the relation of water supply adequacy to respondents' profile and the selected TECs. The findings showed that the bottled/mineral water acceptance by the flood victims was insufficient for drinking and cooking purposes, while the acceptance of rainwater as a water supply for bathing and washing was sufficient. The findings also show that the water supply was insufficient for drinking (84.96%), cooking (85......

1260 hits

Purpose: Academia is known for its high competitiveness, with prestige and diverse responsibilities and achievements being decisive determinants of success resulting in academic incivility. This paper extends Lazarus and Folkman's theory of stress by examining the moderating role of interpersonal justice (IJ) , as supervisory support, on academics' job satisfaction and depressivity. Design/methodology/approach: The study recruited 185 academics from a public university in Malaysia to participate in a survey. Using the partial least squares- structural equation modeling (PLS-SEM) analysis, academic incivility was negatively related to job satisfaction, whilst positively related to depressivity. Findings: As hypothesized, it was found that the predicted detrimental effect of academic incivility on job satisfaction was buffered by perceiving high IJ from their immediate supervisors, i.e. deans or heads of department. An unanticipated finding was that there was a stronger relationship betw.....

1355 hits

Background: Sahrmann ¯ve-level core stability test protocol has been used to evaluate the ability of the core muscles to stabilize the spine. However, validation studies on the Sahrmann protocol are limited. Objective: The purpose of this study was to compare the di®erent levels of Sahrmann ¯ve-level core stability (levels 1–5) on the muscle activity of rectus abdominis (RA), external oblique (EO), and transverse abdominis/internal oblique (TrA/IO). Methods: Twenty-two asymptomatic male participants aged 21.36
1.59 years were recruited. Participants were instructed to perform maximum voluntary contraction (MVC) and ¯ve levels of Sahrmann ¯ve-level core stability test guided with a pressure biofeedback unit (PBU). The surface electromyography (EMG) data of each muscle during ¯ve levels of Sahrmann ¯ve-level core stability test were normalized as a percentage of MVC. Results: Results showed signi¯cant di®erences in the normalized EMGs of RA [
2(4) = 64.80, p < 0.001], EO [
2.....

1458 hits