What about the tertiary climate? Reflecting on five decades of class climate research     

Alansari  Mohamed  Rubie-Davies  Christine 《Learning Environments Research》2020,23(1):1-25

Learning Environments Research - Although studies on, and reviews of, class climate have flourished in the past decade, little is known about how student perceptions of the learning environment are...  相似文献   

Acids and Bases: The Appropriation of The Arrhenius Model by Tunisian Grade 10 Students     

Latifa Ouertatani  Alain Dumon  Malika Ayadi Trabelsi  Mohamed Soudani 《International Journal of Science and Mathematics Education》2007,5(3):483-506

In this work, we propose to identify the knowledge that Tunisian grade 10 students build up concerning acids and bases. Thus, after learning, we have proceeded by giving a paper and pencil task to students of two levels of teaching. The results obtained allow us to say that the assimilated knowledge is transitory; that the students have a worse perception of the base than of the acid concept and these two concepts are independent; that they associate the acid or base strength to its concentration; that the pH is far from being a “tool” of estimation of the degree of acidity; and that the students have difficulty in linking the empirical and the models’ registers. Moreover, some alternative conceptions that can be harmful to the learning of Brønsted’s model appear.  相似文献   

Academic and social attributions as predictors of emotional and behavioural difficulties in students referred for learning disabilities and typically achieving students: the female profile in Oman     

Mahmoud Mohamed Emam 《Emotional and Behavioural Difficulties》2018,23(3):326-339

Identification of children who exhibit emotional and behavioural difficulties (EBDs) has been prioritized in several countries in the Middle East and North Africa (MENA) region including Oman. Research showed that cognitive attribution processes are biased and defective in atypical populations such as students with learning disabilities (LD). The current study examined the relationship between school-based attributions including academic and social attributions and the display of EBDs in students referred for having LD and typically achieving students. The Student Academic Attribution Scale (SAAS), Student Social Attribution Scale (SSAS), and the Arabic version of the Strengths and Difficulties Questionnaire (A-SDQ) were administered to 135 typically achieving students and 89 students referred for LD. The participants were all females from middle school. Stepwise regression analyses showed that academic and social attributions were more predictive of EBDs in students referred for LD compared to typically achieving students. The attribution profile of students with LD reflected negative symptoms that lead to the display of internalizing and externalizing EBDs. The study findings are discussed in relation to how schools can utilize the cognitive process of attribution to support students with EBDs.  相似文献   

ASR technology for children with dyslexia： Enabling immediate intervention to support reading in Bahasa Melayu   总被引：1，自引：0，他引：1  

Husniza Husni Zulikha Jamaludin 《美中教育评论》2009,6(6):64-70

Reading is an essential skill towards literacy development, and should be provided so that children can master the skill at their early ages. For dyslexic children, mastering the skill is a challenge. It has been widely agreed that the theory behind such difficulties in reading for dyslexic lies in the phonological-core deficits. Support has been given in many ways to dyslexic children to teach them reading through using various multi-sensory methods and using computer-based applications that include animated characters and text-to-speech （TTS） technology. In such applications, although stimulating, it requires the children to call for help by clicking on the custom-made buttons on the computer screen, often, such an application requires the dyslexic children to be aware of their mistakes and be able to judge when help is needed. They are just reluctant to ask the computer for help. Hence, such technology does not provide immediate intervention to correct any reading failure. It is therefore worth to look at the promising automatic speech recognition （ASR） technology to provide such intervention. Hence, this paper gives an overview of the use of ASR to facilitate immediate reading intervention which is the key element of remediating reading among dyslexic children. For such intervention to work, data on reading mistakes and patterns are observed and collected in audio format. The data serve as training and testing samples for an ASR to train on. An observation was carried out in two public schools participated in the study to record dyslexic children＇s reading in Bahasa Melayu （BM） and observe error patterns and their behaviors toward reading. A total of 10 dyslexic children are involved and a total of 6384 utterances from a set of selected words have been gathered and analyzed. Data are grouped into error type categories and the analysis performed gives ＂vowel substitution＂ as the most frequent error made （20%）. The significant findings can be of interest of special education teachers or parents to devise and use suitable approach to correct reading mistakes often made by dyslexic children. The findings also contribute to the development of a suitable and well-tuned ASR model focusing on dyslexic children reading aloud in BM.  相似文献   

Building a customized module for the treatment of drug addiction under the remedial programs to be implemented on inmates at the drug rehabilitation centers in Malaysia     

Jamaludin Ahmad Tajularipin Sulaiman Saifuddin Kumar Abdullah Junaidi Shamsuddin 《美中教育评论》2009,6(11):57-64

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Control of switch-sharing-based multilevel inverter suitable for photovoltaic applications     

Jafferi Jamaludin  Syarkawi Syamsuddin  Nasrudin Abd. Rahim  Hew Wooi Ping 《Journal of The Franklin Institute》2018,355(3):1018-1039

Owing to the higher amount and the better quality of power transferred, three-phase multilevel inverters have strengthened their presence in low-power photovoltaic (PV) applications. However, the existing topologies investigated for low-power PV systems are basically meant for medium- and high-power applications, thus making them underutilized for low-power range. In order to address this shortcoming, this paper proposes a three-phase multilevel inverter with a switch-sharing capability and its control solution. It combines the characteristics of the two-level full-bridge topology and the diode-clamped multilevel structure. As a result, the inverter can be used with full capacity and without being underutilized, and significantly improves the output quality. A control strategy that is able to maximize the full potential of the inverter is developed. A digital proportional-integral (PI) controller with a new tuning algorithm is designed to effectively deal with the load changes. The result reveals that the load current is always retained at the intended quality level despite the variations in load. The performance of the inverter is validated from the experimental work conducted on a laboratory prototype under closed-loop conditions.  相似文献   

Towards a competency model: A review of the literature and the competency standards     

Maryam El Asame  Mohamed Wakrim 《Education and Information Technologies》2018,23(1):225-236

Competency-based approaches using information and communication technologies have been the main solution of the organization’s expectations in all fields (public and private) to increase the products’ quality and employees’ capacity. Furthermore, the concept of competency can have several different definitions, which may make it difficult to model. As a result, without a good representation of the knowledge and competency and reusable definitions of competence, an e- Learning system will be unable to adapt to its users, to personalize learning activities. In this paper, we present a view of some important competency definitions and the main competency specifications, like the HR-XML specification (Human Resources XML), and the IMS Reusable Definition of Competency or Educational Objective (IMS RDCEO). Moreover, we suggest a competency model for training and education based on these specifications.  相似文献   

Toxic effects of Litsea elliptica Blume essential oil on red blood cells of Sprague-Dawley rats     

Izatus Shima Taib  Siti Balkis Budin  Seri Maseran Siti Nor Ain  Jamaludin Mohamed  Santhana Raj Louis  Srijit Das  Sulaiman Sallehudin  Nor Fadilah Rajab  Othman Hidayatulfathi 《Journal of Zhejiang University. Science. B》2009,10(11):813-819

Litsea elliptica Blume leaves have been traditionally used as medicinal herbs because of its antimutagenicity, che-mopreventative and insecticidal properties. In this study, the toxic effects of L. elliptica essential oil against Sprague-Dawley rat's red blood cells (RBCs) were evaluated. L. elliptica essential oil was given by oral gavage 5 times per week for 3 treated groups in the doses of 125, 250, and 500 mg/(kg body weight), respectively, and the control group received distilled water. Full blood count, RBC osmotic fragility, RBC morphological changes, and RBC membrane lipid were analyzed 28 d after the treatment. Although L. elliptica essential oil administration had significantly different effects on hemoglobin (Hb), mean cell hemoglobin concentration (MCHC), mean cell volume (MCV), and mean cell hemoglobin (MCH) in the experimental groups as compared to the control group (P<0.05), the values were still within the normal range. L. elliptica induced morphological changes of RBC into the form of echinoeyte. The percentage of echinocyte increased significantly among the treated groups in a dose-response manner (P<0.001). The concentrations of RBC membrane phospholipids and cholesterol of all treated groups were significantly lower than those of control group (P<0.001). However, the RBC membrane osmotic fragility and total proteins of RBC membrane findings did not differ significantly between control and treated groups (P>0.05). It is concluded that structural changes in the RBC membrane due to L. elliptica essential oil administration did not cause severe membrane damage.  相似文献   

Flatness-based adaptive fuzzy output tracking excitation control for power system generators     

Hassan A. Yousef  Mohamed Hamdy  Muhammad Shafiq 《Journal of The Franklin Institute》2013

In this paper, a novel approach for the design of an indirect adaptive fuzzy output tracking excitation control of power system generators is proposed. The method is developed based on the concept of differentially flat systems through which the nonlinear system can be written in canonical form. The flatness-based adaptive fuzzy control methodology is used to design the excitation control signal of a single machine power system in order to track a reference trajectory for the generator angle. The considered power system can be written in the canonical form and the resulting excitation control signal is shown to be nonlinear. In case of unknown power system parameters due to abnormalities, the nonlinear functions appearing in the control signal are approximated using adaptive fuzzy systems. Simulation results show that the proposed controller can enhance the transient stability of the power system under a three-phase to ground fault occurring near the generator terminals.  相似文献   

Polymorphisms of the <Emphasis Type="Italic">IGF1</Emphasis> gene and their association with growth traits,serum concentration and expression rate of <Emphasis Type="Italic">IGF1</Emphasis> and <Emphasis Type="Italic">IGF1R</Emphasis> in buffalo     

Mohammed A. El-Magd  Ayman A. Saleh  Abeer A. Nafeaa  Shymaa M. El-Komy  Mohamed A. Afifi 《Journal of Zhejiang University. Science. B》2017,18(12):1064-1074

The insulin-like growth factor 1 (IGF1) gene is a member of the group of somatotropin axis genes that play a significant role in cell proliferation and growth of muscles. Here, we searched for polymorphisms in buffalo IGF1 and found two novel single nucleotide polymorphisms (SNPs), G64A and G280A, in the noncoding sequences of exon 1 and exon 4, respectively. Statistical analysis of different genotypes showed that the individuals with GG genotypes had significantly (P<0.05) higher body weight (BW) and average daily gain (ADG) than those with other genotypes at ages of 3–6 months in G64A SNP and 6–9 months in G280A SNP. The combined genotypes of these two SNPs produced three haplotypes, GG/GG, AG/AG, and AA/AA, which were significantly associated (P<0.0001) with BW and ADG at an age from 3 to 12 months. Buffaloes with the homozygous GG/GG haplotype showed higher growth performance than other buffaloes. The two SNPs were correlated with mRNA levels of IGF1 and IGF1 receptor (IGF1R) in semitendinosus muscle as well as with the serum concentration level of IGF1. Also, buffaloes with GG/GG haplotype showed higher mRNA and serum concentration levels. The data revealed that these two SNPs could be valuable genetic markers for selection of Egyptian buffaloes for better performance in the population.  相似文献