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In 2003, the Malaysian Government announced the policy of Teaching of Mathematics and Science in English [ETeMS or better known by its Malay acronym, Pengajaran dan Pembelajaran Sains dan Matematik dalam Bahasa Inggeris (PPSMI)]. The policy has, however, caused a furore, with both Malay nationalists and Chinese educationists treating the decision as an attack on their identity. Later in July 2009, the Malaysian Government announced to reverse the PPSMI policy starting from 2012. Researchers have long understood news as an artefact of a socially constructed reality. In making news, journalists shape a reality that reflects the political economic and ideological boundaries within which they work. By employing framing as the theoretical framework and content analysis as the research method, this study examined what pictures newspapers have created for citizens' understanding of the reversal of PPSMI policy. It was found that the mainstream newspapers framed the issue in similar ways, which was to explain and justify the reversal. Meanwhile, the alternative newspaper reflected what was mostly left outwhile the alternative newspaper reflected what was mostly left out and provided a counter-hegemonic discourse. 相似文献
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Dendritic cells(DCs),the most prevalent antigen-presenting cell in vivo,had been widely characterized in the lastthree decades.DCs are present in almost all tissues of the body and play cardinal roles in recognition of microbial agents,autoantigens,allergens and alloantigen.DCs process the microbial agents or their antigens and migrate to lymphoid tissues topresent the antigenic peptide to lymphocytes.This leads to activation of antigen-specific lymphocytes.Initially,it was assumedthat DCs are principally involved in the induction and maintenance of adaptive immune responses,but now it is evident that DCsalso have important roles in innate immunity.These features make DCs very good candidates for therapy against variouspathological conditions including malignancies.Initially,DC-based therapy was used in animal models of cancers.Data fromthese studies inspired considerable optimism and DC-based therapies was started in human cancers 8 years ago.In general,DC-based therapy has been found to be safe in pati 相似文献
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Jiajun Guo Islam A. Y. M. Atiquil Teo Timothy Spector Jonathan Michael 《Instructional Science》2019,47(5):609-625
Instructional Science - This study focuses on visual creativity and how it can be supported with computer technologies and thereby be used to support learning and instruction. However, studies... 相似文献
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This study examined the relationships between primary schoolteachers’ attitudes, efficacy beliefs and perceived support and their behavioural intentions in regard to teaching students who display inappropriate behaviour in regular classrooms. Ajzen’s Theory of Planned Behaviour (TPB) was used to guide the conceptual framework of the study. A total of 1090 teachers from 263 government primary schools located in urban, suburban and rural areas of one educational region of Bangladesh were surveyed. Hierarchical regression was utilized to analyse data. Results revealed that attitudes and efficacy beliefs were significant predictors of teachers’ behavioural intentions in teaching students who exhibit inappropriate behaviour. The three predictive variables (attitudes, efficacy beliefs and perceived support) accounted for 59% of the variance in teachers’ intentions. The findings of the study indicate possible implications for policymakers and teacher educators in Bangladesh. 相似文献
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Asma Farhat Sherwani Sameena Mohmood Fauzia Khan Rizwan Hasan Khan Md. Asim Azfer 《Indian journal of clinical biochemistry : IJCB》2003,18(2):169-180
Lectins, a group of specific glycoproteins present in animal as well as plant cells, are used as differentiating markers to
study cancers and metastatic cell lines. This property of lectins depends on the process of cellular glycosylation. Glycosylation
of some of the extracellular membrane proteins and lipids maintains the cell/cell and cell/matrix interactions. Chemical alterations
in glycosylation play an important role in the metastatic behavior of tumor cells. Carbohydrate residues of the membrane glycoproteins
can be detected using lectins due to their binding specificity to carbohydrates. Lectins, therefore have gained an importance
in the field of cancer research. Galectins, a specialized group of lectin like proteins that are Ca+ independent and galactoside
binding, are also considered as differentiation markers in some specific cancers like the carcinomas of thyroid.
Thus the use of lectins and galectins to identify specific carbohydrates present on cell surface help in invasion and metastasis
processes. 相似文献
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The objective of perforating the petroleum wells is to maximize well productivity. A good connectivity between the wellbore and formation can lead up to achieve that goal. However, the conventional method of perforation, which basically involves the use of explosive charges, rarely meets the expected well productivity. It is mainly because of the formation of a region of reduced permeability around the perforation tunnel. To offset such and several other shortcomings of present practices, a new technique is required, the highlight of this paper. Described as the ‘perforation by drilling’ (PD), this new technique is examined and compared for its performance with that of another technique, ‘Perforation by Shooting’ (PS). For this, the experimental and numerical results of the PS technique on cylindrical sand samples of varying amounts of strength and porosity are studied. Moreover, in order to achieve a so-called ‘perfect perforation’, results are compared with the ‘Casting technique’. Three different samples were selected for the measurement of fluid flow rate and differential pressure across the perforation using a ‘geotechnical digital system’ (GDS), which is a triaxial testing device. Profiles such as fluid flow rate with a change in differential pressure and pressure build-up data with time, signify that the PD technique can achieve maximum wellbore productivity when compared to the PS technique. Results also indicate that at a 100 kPa differential pressure, the PS, PD and Casting techniques can achieve 0.20, 0.65 and 1.00 mL/s fluid flow rates respectively across a sample. The paper also implements a 1-D time dependent porous media flow model to simulate flow across the perforated cylindrical samples created by the PS, PD and Casting techniques. Results show a good consistency between the experimental and numerical approaches. 相似文献
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Three studies examined the links between psychological control and prosociality in middle childhood, and the role of religiosity as a moderator. Study 1 (101 Israeli Jewish families, ages 6–9, 50% girls) found a significant interaction, with a negative association between maternal psychological control and children's prosociality in secular but not in religious families. Study 2 (161 Israeli Jewish families, ages 6–12, 48% girls) replicated this interaction for mothers using a continuous religiosity measure. Study 3 (64 Arab Muslim Israeli families, ages 6–8.5, 50% girls) also found a significant interaction, with a positive link between psychological control and prosociality seen at higher, but not at lower, religiosity levels. The findings suggest that religiosity may alter the meaning and consequences of parenting practices. 相似文献