The use of erbium ions, Er3+ to enhance the dielectric properties is investigated in tellurite glass system for the frst time, tothe best of our knowledge. A glass series of tellurite glass with chemical composition, {[(TeO2)70(B2O3)30]70(ZnO)30}100−y(Er2O3)y (y = 0, 0.005, 0.01, 0.02, 0.03, 0.04 and 0.05) was fabricated via melt-quenched technique. The X-ray difraction and Fourier transform infrared spectroscopy analysis proved the amorphous structure and the formation of nonbridging oxygen in the glass system. The Er3+ ions afect greatly to the dielectric constant, ε′ in which the dielectric constant, ε′ show high value at a lower frequency and higher temperature (above 110 °C). The reduction of dielectric constant, ε′ is found with the increment value of frequency, which corresponds to the formation of the hindrance efect on heavy dipoles caused by the mixed transition-ion efect. Meanwhile, the dielectric constant, ε′ is enhanced with the increase of temperature. The .....

1218 hits

A system of erbium oxide nanoparticles doped rice-husk-silicate borotellurite glasses with compositional formula, {[(TeO2)0.7 (B2O3)0.3]0.8 (SiO2)0.2}1−y (Er2O3 NPs)y with y = 0.01, 0.02, 0.03, 0.04 and 0.05 was fabricated using the method of melt-quenching. Various characterizations and measurement techniques such as density and molar volume, X-ray diffraction, Fourier transform infrared, transmission electron microscopy and UV–Vis spectroscopy were carried out to study the structural, morphological and optical properties of the fabricated glasses. The density values for the glasses increased from 4.1900 to 4.6003 g cm−3 with the addition of 1% to 5% of Er2O3 NPs in the glass structure. The increase can be ascribed to increase in the overall molar weight of the glass caused by the higher molecular weight of erbium. The microstructural nature revealed in the glass morphological evidence of nanoparticle agglomerations in the glasses. From the UV–Vis spectra both direct and i.....

951 hits

Kajian ini berbentuk analisis kandungan kualitatif bertujuan meneroka pandangan guru-guru mengenai masalahbuli dalam kalangan murid di sekolah. Respons bertulis daripada para peserta diperoleh melalui edaran set soalan berbentuk umum dan terbuka yang dihantar menggunakan mel elektronik. Penganalisisan data pula dibuat secara induktif untuk mengenal pasti kategori-kategori dan tema-tema yang terkandung dalam bahan kajian. Dapatan kajian menunjukkan bahawa terdapat sepuluh tema merangkumi definisi, lokasi, murid yang terlibat, punca, dan keseriusan masalah buli. Selain itu, didapati majoriti guru kurang jelas tentang definisi buli. Namun begitu, mereka beranggapan bahawa masalah buli dalam kalangan murid adalah serius dan perlu dibanteras dengan segera. Memandangkan dapatan hanya terhad kepada perbincangan tema dan kategori, maka dicadangkan agar kajian lanjutan, khususnya kajian berbentuk grounded theory dijalankan. Kajian sebegini membolehkan pengkaji meneroka pengalaman guru dengan le.....

1751 hits

New glass samples with composition (1 – x)[(TeO2)70(B2O3)30] – x(Gd2O3) with x = 0.2, 0.4, 0.6, 0.8 and 1.0 in mol% have been synthesized by conventional melt-quenching techniques. X-ray diffraction (XRD) studies were performed in order to confirm the amorphous nature of the samples. The density of the samples has been found to vary with the Gd2O3 content, whereas an opposite trend has been observed in the molar volume. The analysis of Fourier Transform Infrared (FT-IR) spectroscopy of the samples showed that the glass network is mainly built of TeO3, TeO4, BO3 and BO4 units. The addition of Gd2O3 changed the refractive index, optical band gap and Urbach energy of the glass samples. The thermal properties of the studied glasses were investigated by measuring the thermal diffusivity of the samples by using photoflash method at room temperature..

1370 hits

This research intended to investigate and assess the leadership practices amongst headmasters of C accredited primary schools in the region of Paser, Indonesia. The qualitative research approach was employed in the form of a case study research design. The respondent selection was carried out through the purposive sampling method resulting in the choosing of three primary school headmasters from the region of Paser, Indonesia. The instruments utilized for data collection purposes comprised of interview, observation and document analysis. Research result demonstrated that the three headmasters as school leaders practiced several of the traits proposed in the instructional leadership and leadership strategies theories. The elements that were observed practiced by the headmasters include planning and disseminating school goals, planning teaching management programmes, supervising and assessing teaching programmes, monitoring students’ progress, controlling study period, encouraging prof.....

1208 hits

Kajian ini adalah bertujuan untuk menerangkan hubungan antara ciri-ciri kerja berpasukan dengan keberkesanan kerja berpasukan dalam kalangan guru-guru Tingkatan Enam Sekolah Menengah Kebangsaan di Negeri Pahang. Kajian ini adalah berbentuk kuantitatif melibatkan pengumpulan data yang dilakukan menggunakan soal selidik. Populasi kajian adalah seramai 677 orang. Sampel kajian melibatkan 250 orang guru Tingkatan Enam Sekolah Menengah Kebangsaan di Negeri Pahang. Statistik deskriptif digunakan bagi menjawab persoalan kajian manakala statistik inferensi iaitu analisis Korelasi Pearson untuk menguji hipotesis. Dapatan kajian menunjukkan daripada analisis Korelasi Pearson, bagi aspek dibawah tema proses, analisis menunjukkan aspek potensi, perkongsian beban tugas dan komunikasi/kerjasama di dalam pasukan kerja menunjukkan hubungan yang tinggi dengan keberkesanan pasukan kerja. Bagi aspek di bawah tema reka bentuk tugas, aspek pelbagai tugas dan penglibatan menunjukkan hubungan yang tinggi den.....

992 hits

Mobile Multihop Relay (MMR) network is an attractive and low-cost solution for expanding service coverage and enhancing throughput of the conventional single hop network. However, mobility of Mobile Station (MS) in MMR network might lead to performance degradation in terms of Quality of Service (QoS). Selecting an appropriate Relay Station (RS) that can support data transmission for high mobility MS to enhance QoS is one of the challenges in MMR network. The main goal of the work is to develop and enhance relay selection mechanisms that can assure continuous connectivity while ensuring QoS in MMR networkusing NCTUns simulation tools. The approach is to develop and enhance a relay selection for MS with continuous connectivity in non-transparent relay. In this approach, the standard network entry procedure is modified to allow continuous connectivity with reduced signaling messages whenever MS joins RS that is out of Multihop Relay Base Station (MRBS) coverage and the relay selection is .....

1845 hits

This study investigates the effects of schemata in enhancing critical thinking skills during Problem based learning task. This is because many educated students are not capable to "think out of the box". In addition, they are also not able to use their critical thinking in writing and speaking. Therefore, the purpose of this research is to investigate whether ESL learners' content schemata and formal schemata enhance their critical thinking skills such as identifying problems, causes, effects and suggesting solutions during Problem based learning. Purposive sampling was conducted on a group of 6 respondents from Form 2 in a rural secondary school, in Perak. This research is an ethnographic research using the Vignettes technique. Hence, the research instruments include the interview, writing task, and reading comprehension test. Data was analyzed using constant comparison method. The findings of this research revealed that, both content schemata and formal schemata enhanced E.....

1290 hits

The use of technology in creating Teaching Aids (TA) for the Teaching and Learning (TL) process has a great impact on delivering knowledge and skills as well as expediting the learning process amongst students. Additionally, game-based TA plays an important role in improving the achievement and efficiency of students in the classroom. This research was conducted to develop the education kit for TL Resistor Color Code (RCC). The main purpose of this education kit development is to help students understand the RCC through a fun learning environment based on hands-on learning activity. This education kit known as Resistor Value Checker (RVC) kit is built on the concept of 21st Century Learning (21-CL) which concerns about the use of appropriate technology in the process of the TL in the classroom. It is designed with the latest facilities and different from existing products in the market...

2164 hits

Kajian ini dijalankan untuk mengenal pasti sumbangan Modul Celik STEM yang dibangunkan terhadap pemikiran kreatif murid dalam pembelajaran sains. Kajian tentang reka bentuk kuasi eksperimen dengan jenis kumpulan kawalan tidak setara melibatkan sampel seramai 60 orang murid tingkatan satu yang berusia 13 tahun dari sekolah berasrama di daerah Baling, Kedah. Sampel dibahagikan kepada dua kumpulan; 30 orang mewakili kumpulan rawatan dan 30 orang lagi mewakili kumpulan kawalan. Data yang dikumpul daripada skor ujian pra-pasca-pemikiran kreatif (UPK) dianalisis menggunakan analisis kovarian sehala pada aras signifikan p < .05. Dapatan menunjukkan terdapat perbezaan yang signifikan bagi skor UPK antara kumpulan rawatan dan kumpulan kawalan apabila skor ujian pra dikawal secara statistik, F (1,57) = 16.639, p = .000, partial eta squared = .226. Selain itu, terdapat hubungan yang signifikan dan sederhana kuat antara skor ujian pra dan ujian pasca UPK dengan nilai partial eta squared = .082. Ke.....

1113 hits