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Enhancing Students’ Understanding in Calculus Trough Writing
Noraini Idris
International Electronic Journal of Mathematics Education , 2009,
Abstract: The purpose of this study was to investigate the effects of using writing activities on students’ understanding and achievement in Calculus. The design of this study was quasi-experimental. The subjects of this study consisted of two secondary schools in one of the states in Malaysia. Each school was assigned one intact class of Form Four to be the experimental group and another one intact class as the control. The experimental group learned mathematics by using the writing activities for five weeks, while the control group learned mathematics by using traditional whole-class instruction. A 20-item Calculus Achievement test was designed with reliability .87. The findings showed that the experimental group exhibited significantly greater improvement on calculus achievement. The students showed positive reaction towards the use of writing. Findings of this study provide information to schools to take advantage of writing activities to promote understanding.
Noraini Idris,Chew Cheng Meng
Academic Research International , 2011,
Abstract: The purpose of this study was to examine the effect of performance assessment that incorporated the useof graphic calculator on secondary students’ mathematics achievement. This study adopted a quasiexperimental non-equivalent control group design and random sampling to select eleven publicsecondary schools from six states in Malaysia that represent different geographical locations anddiverse economic, social and cultural backgrounds of the student population in the country. Quantitativedata were collected through pretest and posttest to assess secondary students’ mathematics achievement before and after the intervention. The results show that the experimental groups in all the eleven schools performed significantly better than the control groups in the mathematics achievement test after the intervention, indicating that graphic calculator-based performance assessment was effective inimproving secondary students’ mathematics achievement.
Assessing Algebraic Solving Ability Of Form Four Students
Lim Hooi Lian,Noraini Idris
International Electronic Journal of Mathematics Education , 2006,
Abstract: Mathematics researchers generally agree that algebra is a tool for problem solving, a method of expressing relationship, analyzing and representing patterns, and exploring mathematical properties in a variety of problem situations. Thus, several mathematics researchers and educators have focused on investigating the introduction and the development of algebraic solving abilities. However research works on assessing students' algebraic solving ability is sparse in literature. The purpose of this study was to use the SOLO model as a theoretical framework for assessing Form Four students' algebraic solving abilities in using linear equation. The content domains incorporated in this framework were linear pattern (pictorial), direct variations, concepts of function and arithmetic sequence. This study was divided into two phases. In the first phase, students were given a pencil-and-paper test. The test comprised of eight superitems of four items each. Results were analyzed using a Partial Credit model. In the second phase, clinical interviews were conducted to seek the clarification of the students' algebraic solving processes. Results of the study indicated that 62% of the students have less than 50% probability of success at relational level. The majority of the students in this study could be classified into unistructural and multistructural. Generally, most of the students encountered difficulties in generalizing their arithmetic thinking through the use of algebraic symbols. The qualitative data analysis found that the high ability students seemed to be more able to seek the recurring linear pattern and identify the linear relationship between variables. They were able to co-ordinate all the information given in the question to form the algebraic expression and linear equations. Whereas, the low ability students showed an ability more on drawing and counting method. They lacked understanding of algebraic concepts to express the relationship between the variables. The results of this study provided evidence on the significance of SOLO model in assessing algebraic solving ability in the upper secondary school level.
Diadegma semiclausum as a Possible Factor for the Horizontal Transmission of Microsporidial Disease of Diamondback Moth, Plutella xylostella L.
Idris A. B.,B. A. H. Zainal-Abidin,I. Noraini,A. K. Hussan
Pakistan Journal of Biological Sciences , 2001,
Abstract: A study was conducted to test the hypothesis that Diadegma semiclausum is one of the factors involved in horizontal transmission of the microsporidial disease of the diamondback moth (DBM), Plutella xylostella L. Results showed that 41% of the larvae exposed to presumably microsporidia contaminated the adult D. semiclausum died before pupation, and all of the dead larvae were observed to have abundant microsporidia spores. None of the DBM larvae in the control treatment died before pupation. The microsporidia spores were detected on the body of the parasitoid adults (D. semiclausum) of both sexes, indicating that the parasitoid get contaminated with spores during eclosion or host finding bout. The spores were also detected within parasitoid`s body (abdomen) of both sexes, and within the sex organ of the adult parasitoid female. This suggests that parasitoid is infected with the disease during immature stages. The presence of spores within female sex organ (plus ovipositor) could explain why many larvae died before pupation as the parasitoid oviposition (parasitism) behaviour indirectly transmit the disease spore to the host (DBM) larvae.
Acoustic Pronunciation Variations Modeling for Standard Malay Speech Recognition
Noraini Seman,Kamaruzaman Jusoff
Computer and Information Science , 2009, DOI: 10.5539/cis.v1n4p112
Abstract: This paper presents different methods of handling pronunciation variations in Standard Malay (SM) speech recognition. Pronunciation variation can be handled by explicitly modifying the knowledge sources or improving the decoding method. Two types of pronunciation variations are defined, namely, complete or phone changes and partial or sound changes. Complete or phone change means that one phoneme is realized as another phoneme. Meanwhile, a partial or sound change happens when the acoustic realization is ambiguous between two phonemes. Complete or phone changes can be handled by constructing a pronunciation variation dictionary to include alternative pronunciations at the lexical level or dynamically expanding the search space to include those pronunciation variants. Sound or partial changes can be handled by adjusting the acoustic models through sharing or adaptation of the Gaussian mixture components. Experimental results show that the use of a pronunciation variation dictionary and the method of dynamic search space expansion can improve speech recognition performance substantially. The methods of acoustic model refinement were found to be relatively less effective in our experiments.
Genetic Algorithm Performance with Different Selection Strategies in Solving TSP
Noraini Mohd Razali,John Geraghty
Lecture Notes in Engineering and Computer Science , 2011,
Calculation of Reactions Cross Section for Neutron-Induced Reactions on 127I Isotope  [PDF]
Idris Ahmad, Fatima Salman Koki
International Journal of Medical Physics,Clinical Engineering and Radiation Oncology (IJMPCERO) , 2017, DOI: 10.4236/ijmpcero.2017.63031
Abstract: In this work, the reaction cross-section for neutron-induced reactions on 127I isotope was calculated using EXIFON code in the energy range of incident particle from 0 MeV to 30 MeV. The code is based on an analytical model for statistical multistep direct and multistep compound reactions (SMD/SMC model). In order to see the effect of nuclear structure on cross sections, the calculation was done using nuclear shell structure effect and without considering shell structure effect. Obtained results and statistical analysis showed that shell structure effect does not give significant changes to the cross-section at considered energy ranges. This shows that EXIFON code is a good tool for investigation of nuclear reaction cross section and is useful in the production of the radioisotopes of Iodine, Antimony and tellurium of high purity and in an efficient manner using cyclotron or nuclear reactors, these isotopes have potential application for field of medical science especially for diagnostics and therapeutic purposes.
Effect of Integrated Use of Mineral, Organic N and Azotobacter on the Yield, Yield Components and N-nutrition of Wheat (Triticum aestivum, L.)
Mohammad Idris
Pakistan Journal of Biological Sciences , 2003,
Abstract: The effect of mineral N, organic N and Azotobacter alone and in various combination was investigated on the yield and N nutrition of wheat in an experiment. The results revealed that mineral, organic fertilizers and Azotobacter applied alone and in various combinations significantly improved the yield, yield components and N uptake by wheat crop as compared to control. The effect of fertilizers treatments in improving the biomass yield of wheat was statistically higher (P 0.05) as compared to mineral N or produced biomass yield statistically (P 0.05) at par with mineral N applied at 60 mg kg-1 soil. Mineral N (30 mg N kg-1 soil+ Azotobacter ) organic N (30 mg N kg-1 soil+ Azotobacter) and organic N (60 mg kg-1 soil) resulted in significantly ((P 0.05) lower biomass yield as compared with mineral N applied (60 mg kg-1 soil). Azotobacter of wheat alone also produced lower biomass yield as compared to mineral N applied at 60 mg kg 1 soil. Application of mineral N, organic N and Azotobacter alone and in various combinations either improved statistically (P 0.05) or produced an equivalent N uptake response as compared to mineral N applied at 60 mg kg 1 soil. Azotobacterization alone did not produce any significant improvement in biomass N uptake as compared to mineral N applied at 60 mg kg-1 soil. At last 50% of mineral N can be saved as a result of judicious combination of mineral N, organic N and or biofertilization of wheat with Azotobacter while obtaining an equivalent or higher biomass yield as compared to mineral N applied at 60 mg kg-1 soil.
MAJAZ DALAM AL-QUR’AN: Persoalan Teologis atau Bahasa?
Mardjoko Idris
Mukaddimah : Jurnal Studi Islam , 2011,
Abstract: The issue of metaphor (majaz) has been heatedly debated amongst scholars. The problem lays on the question whether al-Qurán contains metaphoric languages or otherwise. It finds that two contradicting perspectives: the first argues there are metaphoric styles in the Qur’an and the other argues otherwise. Artikel ini menjelaskan majaz yang menjadi tema perdebatan dalam kajian al-Qur’an. Persoalannya terletak pada pertanyaan apakah al-Qur’an mengandung metafora atau tidak. Penulis menemukan dua pandangan yang bertentangan: yang berpendapat bahwa metafora dapat ditemukan dalam al-Qur’an dan pandangan yang melihat sebaliknya. Kata Kunci: majaz, gaya bahasa, al-Qur’an
A Profile of Innovative Women Entrepreneurs
Aida Idris
International Business Research , 2009, DOI: 10.5539/ibr.v1n2p3
Abstract: Women entrepreneurs, mainly as a result of culture, have been found to have traits different from their male counterparts and yet they grapple with similar business issues including the need to continuously change and innovate. It is therefore striking that very little is known about the innovative practices of women entrepreneurs, especially those in developing countries. In the study attempt is made to generate a profile of innovative women entrepreneurs based on their personal and business characteristics. Data are compiled from a sample of 138 women entrepreneurs in Peninsular Malaysia, and analysed using ANOVA to determine any correlation between the independent and dependent variables. The results indicate that women’s entrepreneurial innovativeness is very much affected by their age and education, as well as the type, location and size of business. The study then proceeds with the development of their profile and concludes with several research and managerial implications.
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