A framework on exploring primary school English language teachers' perceptions of their continuing professional development in Malaysia

The national concern to improve in-service training (INSET) for English language teachers in Malaysia has led to the need to reshape continuing professional development (CPD). CPD providers in Malaysia tend to conduct training using the cascade model and teachers are hardly consulted about their needs or learning preferences. This is likely to have a significant impact on the quantity and quality of INSET for teachers in a top-down national priority driven system. The research to be reported in this paper focuses on the perceptions of a group of Malaysian primary school English language teachers of their INSET experiences, the CPD models they prefer, and their perceptions of the effect of CPD on their classroom practice. The research also aims to identify their future expectations of INSET in terms of their professional development needs and their pupils’ needs. Qualitative survey research was undertaken using profile questionnaires, focus group interviews and individual interviews, followed by an online survey of all research participants. The researcher followed the CPD journey of three groups of primary school educators, selected using convenience sampling and purposeful sampling. This paper suggests a framework to investigate teachers’ views about their needs. This would shed light on how CPD providers can enhance teachers’ professional development and thus student achievement

Exploring primary school English language teachers’ perceptions of INSET in Malaysia : factors which promoted and hindered professional development

The national concern to improve the level of education in Malaysia prompted the Ministry of Education to conduct a comprehensive review of the education system and introduce the Malaysia Education Blueprint (2013-2025) to transform the education system. One of the aims was to upgrade the quality of in-service teacher training for teachers. This has resulted in a reshaping of the type of courses and delivery mode for in-service education for teachers (INSET) into a top-down, national priority driven training model. The research reported here focuses on investigating the professional development needs of Malaysian primary school English language teachers. Teachers’ perceptions of their professional development and the factors affecting it has so far been under-researched, at least in a Malaysian context. The research is informed by a qualitative survey approach investigating teachers’ perceptions of their CPD through the use of focus groups and individual interviews. This research concerns teachers’ perceptions of the INSET they had attended, their future expectations of CPD, their perceptions of CPD in relation to their pupils’ needs and their views on whether it had changed their practice in the classroom. This paper focuses on the participants’ perceptions of what factors promoted and hindered their professional development and what motivated them to attend programmes for INSET to enhance their skills

A framework on exploring primary school English language teachers’ perceptions of their continuing professional development in Malaysia

The national concern to improve in-service training (INSET) for English language teachers in Malaysia has led to the need to reshape continuing professional development (CPD). CPD providers in Malaysia tend to conduct training using the cascade model and teachers are hardly consulted about their needs or learning preferences. This is likely to have a significant impact on the quantity and quality of INSET for teachers in a top-down national priority driven system. The research to be reported in this paper focuses on the perceptions of a group of Malaysian primary school English language teachers of their INSET experiences, the CPD models they prefer, and their perceptions of the effect of CPD on their classroom practice. The research also aims to identify their future expectations of INSET in terms of their professional development needs and their pupils’ needs. Qualitative survey research was undertaken using profile questionnaires, focus group interviews and individual interviews, followed by an online survey of all research participants. The researcher followed the CPD journey of three groups of primary school educators, selected using convenience sampling and purposeful sampling. This paper suggests a framework to investigate teachers’ views about their needs. This would shed light on how CPD providers can enhance teachers’ professional development and thus student achievement

Electron dynamics in topological insulator based semiconductor-metal interfaces (topological p-n interface based on Bi2Se3 class)

Single-Dirac-cone topological insulators (TI) are the first experimentally discovered class of three dimensional topologically ordered electronic systems, and feature robust, massless spin-helical conducting surface states that appear at any interface between a topological insulator and normal matter that lacks the topological insulator ordering. This topologically defined surface environment has been theoretically identified as a promising platform for observing a wide range of new physical phenomena, and possesses ideal properties for advanced electronics such as spin-polarized conductivity and suppressed scattering. A key missing step in enabling these applications is to understand how topologically ordered electrons respond to the interfaces and surface structures that constitute a device. Here we explore this question by using the surface deposition of cathode (Cu/In/Fe) and anode materials (NO$_2$) and control of bulk doping in Bi$_2$Se$_3$ from P-type to N-type charge transport regimes to generate a range of topological insulator interface scenarios that are fundamental to device development. The interplay of conventional semiconductor junction physics and three dimensional topological electronic order is observed to generate novel junction behaviors that go beyond the doped-insulator paradigm of conventional semiconductor devices and greatly alter the known spin-orbit interface phenomenon of Rashba splitting. Our measurements for the first time reveal new classes of diode-like configurations that can create a gap in the interface electron density near a topological Dirac point and systematically modify the topological surface state Dirac velocity, allowing far reaching control of spin-textured helical Dirac electrons inside the interface and creating advantages for TI superconductors as a Majorana fermion platform over spin-orbit semiconductors.Comment: 14 pages, 4 Figure

A topological insulator surface under strong Coulomb, magnetic and disorder perturbations

Three dimensional topological insulators embody a newly discovered state of matter characterized by conducting spin-momentum locked surface states that span the bulk band gap as demonstrated via spin-resolved ARPES measurements . This highly unusual surface environment provides a rich ground for the discovery of novel physical phenomena. Here we present the first controlled study of the topological insulator surfaces under strong Coulomb, magnetic and disorder perturbations. We have used interaction of iron, with a large Coulomb state and significant magnetic moment as a probe to \textit{systematically test the robustness} of the topological surface states of the model topological insulator Bi$_2$Se$_3$. We observe that strong perturbation leads to the creation of odd multiples of Dirac fermions and that magnetic interactions break time reversal symmetry in the presence of band hybridization. We also present a theoretical model to account for the altered surface of Bi$_2$Se$_3$. Taken collectively, these results are a critical guide in manipulating topological surfaces for probing fundamental physics or developing device applications.Comment: 14 pages, 4 Figures. arXiv admin note: substantial text overlap with arXiv:1009.621

Identification of hydrated silicate minerals on Mars using MRO-CRISM: Geologic context near Nili Fossae and implications for aqueous alteration

The Noachian terrain west of the Isidis basin hosts a diverse collection of alteration minerals in rocks comprising varied geomorphic units within a 100,000 km2 region in and near the Nili Fossae. Prior investigations in this region by the Observatoire pour l'Minéralogie, l'Eau, les Glaces, et l'Activité (OMEGA) instrument on Mars Express revealed large exposures of both mafic minerals and iron magnesium phyllosilicates in stratigraphic context. Expanding on the discoveries of OMEGA, the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) aboard the Mars Reconnaissance Orbiter (MRO) has found more spatially widespread and mineralogically diverse alteration minerals than previously realized, which represent multiple aqueous environments. Using CRISM near-infrared spectral data, we detail the basis for identification of iron and magnesium smectites (including both nontronite and more Mg-rich varieties), chlorite, prehnite, serpentine, kaolinite, potassium mica (illite or muscovite), hydrated (opaline) silica, the sodium zeolite analcime, and magnesium carbonate. The detection of serpentine and analcime on Mars is reported here for the first time. We detail the geomorphic context of these minerals using data from high-resolution imagers onboard MRO in conjunction with CRISM. We find that the distribution of alteration minerals is not homogeneous; rather, they occur in provinces with distinctive assemblages of alteration minerals. Key findings are (1) a distinctive stratigraphy, in and around the Nili Fossae, of kaolinite and magnesium carbonate in bedrock units always overlying Fe/Mg smectites and (2) evidence for mineral phases and assemblages indicative of low-grade metamorphic or hydrothermal aqueous alteration in cratered terrains. The alteration minerals around the Nili Fossae are more typical of those resulting from neutral to alkaline conditions rather than acidic conditions, which appear to have dominated much of Mars. Moreover, the mineralogic diversity and geologic context of alteration minerals found in the region around the Nili Fossae indicates several episodes of aqueous activity in multiple distinct environments

Intimal smooth muscle cells are a source but not a sensor of anti-inflammatory CYP450 derived oxylipins

AbstractVascular pathologies are associated with changes in the presence and expression of morphologically distinct vascular smooth muscle cells. In particular, in complex human vascular lesions and models of disease in pigs and rodents, an intimal smooth muscle cell (iSMC) which exhibits a stable epithelioid or rhomboid phenotype in culture is often found to be present in high numbers, and may represent the reemergence of a distinct developmental vascular smooth muscle cell phenotype. The CYP450-oxylipin - soluble epoxide hydrolase (sEH) pathway is currently of great interest in targeting for cardiovascular disease. sEH inhibitors limit the development of hypertension, diabetes, atherosclerosis and aneurysm formation in animal models. We have investigated the expression of CYP450-oxylipin-sEH pathway enzymes and their metabolites in paired intimal (iSMC) and medial (mSMC) cells isolated from rat aorta. iSMC basally released significantly larger amounts of epoxy-oxylipin CYP450 products from eicosapentaenoic acid > docosahexaenoic acid > arachidonic acid > linoleic acid, and expressed higher levels of CYP2C12, CYP2B1, but not CYP2J mRNA compared to mSMC. When stimulated with the pro-inflammatory TLR4 ligand LPS, epoxy-oxylipin production did not change greatly in iSMC. In contrast, LPS induced epoxy-oxylipin products in mSMC and induced CYP2J4. iSMC and mSMC express sEH which metabolizes primary epoxy-oxylipins to their dihydroxy-counterparts. The sEH inhibitors TPPU or AUDA inhibited LPS-induced NFκB activation and iNOS induction in mSMC, but had no effect on NFκB nuclear localization or inducible nitric oxide synthase in iSMC; effects which were recapitulated in part by addition of authentic epoxy-oxylipins. iSMCs are a rich source but not a sensor of anti-inflammatory epoxy-oxylipins. Complex lesions that contain high levels of iSMCs may be more resistant to the protective effects of sEH inhibitors