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81.
1 Introduction Superconductingweaklinksareveryintriguing ,duetothefactthattheserelativesimplestructuresshowJosephsoneffect[1] .Intheory ,onlythestructuresthathavedimensionscomparablewiththecoherencelengthζareexpectedtoshowtrueJosephsonbehavior[2 ,3] .Inpracti… 相似文献
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A. Essa Abbas Ph. D. Candidate Qin-jun Xu Ke-xi Xu Shi-ping Zhou Jia-shan Bao 《上海大学学报(英文版)》1999,3(4):339-341
Meanders of thin films of TlBa2Ca2CuO2 have been used to make radiation bolometers. Using cw-HeNe at 632 nm the peak responsivity of these films is measured to
be 0.560 V/W at the temperature of 106.0 K. The present experimental data agree well with bolometric response of irradiated
films, and the calculations are presented to support this conclusion. 相似文献
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Sincethediscoveryofhightransitiontemperaturesuperconductors(HTS),manyattemptshavebeenmadetoproducebolometersoperatingatthetransitiontemperatureinthenearandfarinfraredwavelengthregion.Abolometerisatoolfordetectingthermalradiationfromanobjectbymeanso… 相似文献
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Abbas Abdollahi Sana Panahipour Mahnaz Akhavan Tafti Kelly A. Allen 《Psychology in the schools》2020,57(5):823-832
Academic stress is a commonly reported affective state by high school students that can be accompanied by unwanted and unhelpful short- and long-term implications including a low sense of school belonging. Understanding how academic stress may be alleviated or managed by students is an essential consideration for all schools concerned with student well-being. This study aimed to examine the relationship between academic stress and sense of school belonging, as well as the mediation effect of academic hardiness. Four hundred and five high school students from six schools in Tehran (Iran) were recruited in the study. Data analyses with Structural Equation Modeling revealed that a sense of belonging to school (β = −.38, p < .01) and academic hardiness (β = −.40, p < .01) were significant predictors of academic stress. Bootstrapping analysis showed that academic hardiness acted as a mediator between a sense of belonging to school and academic stress. The findings elucidate the underlying mechanism in how low school belonging may lead to academic stress in high school students. Creating a culture of school belonging and teaching and supporting skills related to academic hardiness should be key considerations for all schools seeking to reduce academic stress experienced by their students. 相似文献
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Reading and Writing - In the original publication of the article formatting of Arabic words was incorrectly published. 相似文献
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The arguments in this article have been generated from involvement in a government-funded project designed to improve teaching. The authors reflect on their experience and use Jurgen Habermas's theory of communicative competence to argue that initiatives designed to improve university teaching often work against their own intentions by closing down opportunities for open dialogue. They argue that improvement of teaching requires undistorted communication and demonstrate that this is made difficult: by the pressure to be seen to succeed; by over-specifying what constitutes good teaching; and, by divorcing research from development. At the same time, they suggest that academics could seize opportunities to open up dialogue about teaching. 相似文献
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Tahir Abbas 《牛津教育评论》2013,39(4):447-471
The views of a range of teachers towards South Asians in schools and colleges in Birmingham are explored in this paper. Based on 23 teachers, often senior in nature, from 11 educational institutions (9 schools [1 independent, 2 selective, 6 comprehensive] and 2 further education colleges), analysis of attitudes is in relation to gender and religion; socialisation and language differences between South Asian groups; and teacher ethnicity and antiracist multicultural education policy. It was broadly found that teachers viewed the education of South Asians based on the modus operandi of the educational institution they represented as well as the way in which differing South Asians based on socio-economic status, ethnicity and gender were thought to act and behave. There are implications for how South Asians are perceived as individuals as well as groups by teachers, as well as how schools can make a real attempt to improve existing home-school relations. 相似文献
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Walid E. Zahran Magda I. Mahmoud Kamal A. Shalaby Manal H. Abbas 《Indian journal of clinical biochemistry : IJCB》2013,28(3):272-276
Rheumatoid arthritis (RA) is the most common inflammatory systemic autoimmune disease, primarily affecting the peripheral joints. Anti-mutated citrullinated vimentin autoantibodies (anti-MCV) of IgG isotype were shown to be a useful diagnostic marker of RA especially in RA patients who were anti-cyclic citrullinated protein autoantibodies (anti-CCP) negative. Nevertheless, published data correlates rheumatoid factor (RF), anti-CCP or anti-MCV antibodies with either erythrocyte sedimentation rate (ESR) or serum C-reactive protein (CRP) as markers of disease activity, not investigated the possible correlations of RA autoantibodies towards ESR and CRP in comparison. Herein, we aim to evaluate the usefulness of anti-MCV as a dependable marker in established RA compared with anti-CCP and RF antibodies and to examine correlations between RF, anti-CCP and anti-MCV antibodies towards ESR and serum CRP. Serum RF-IgA, RF-IgM, anti-CCP and anti-MCV levels were measured in 30 patients with RA and 40 patients with other autoimmune diseases (non-RA) compared with 20 normal subjects. Specificity, sensitivity and AUC for RF antibodies, anti-CCP and anti-MCV were calculated towards RA diagnosis. Our results showed that ESR and CRP had significantly higher values in both RA and non-RA patients compared with our healthy controls with observed significant increment in RA patients compared with non-RA patients. An important finding from our study is that 33.3 % of RA patients were anti-CCP negative but being positive towards anti-MCV. Also, in-between 36.7 up to 40 % of RA patients were RF-IgA and RF-IgM negative while being anti-MCV positive. Anti-MCV antibodies showed the highest specificity and sensitivity (97.5 and 86.6 %, respectively) towards RA diagnosis with the highest AUC value (0.920) compared with anti-CCP and RF antibodies. Correlation analyses revealed that there was no significant correlation between ESR along with CRP towards RF-IgA, RF-IgM and anti-CCP while profound highly significant correlation exhibited between ESR and CRP towards anti-MCV data (r = 0.879 and 0.994, respectively). Thus, our data suggest that the assessment of serum anti-MCV autoantibodies along with ESR and CRP considered as a simple laboratory regime for monitoring RA patients to assess and follow-up disease activity. The addition of anti-MCV autoantibodies to serologic markers in the ACR/EULAR classification criteria for RA will add points for patients with negative anti-CCP and RF antibodies. 相似文献