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41.
This paper continues the attempt of Part I to develop a coherent family of measures of influence between classes of documents, for example, language or nationality classes, as indicated by citation choice. In this paper we focus on situations in which there is some ambiguity as to how to assign items to a class. For simplicity, we change our focus from citations to co-authorship patterns, restricting most of our discussion to papers with two authors. Like the earlier paper, we propose very simple models of the citation decision, and base our measures on the parameters that appear in the model. 相似文献
42.
J Kato Alice Abraham Ruram S Sekharjit Singh S Bilasini Devi Th Ibetombi Devi W Gyaneshwar Singh 《Indian journal of clinical biochemistry : IJCB》2007,22(1):128-130
The present, study was conducted to determine the level of malondialdehyde (MDA) as an index of free radial induced lipid
peroxidation and antioxidant vitamins-vitamins A, vitamin C and vitamin E in 75 confirmed cases of urolithiasis. Significantly
high level of MDA (p<0.001) with significantly low levels of vitamin E (p<0.001) and vitamin A (p<0.001) with no significant
decrease in vitamin C (p>0.05) were observed in the plasma of urolithiasis cases as compared to normal controls. In conclusion,
it appears that a role of lipid peroxidation and oxidative function exists in the pathogenesis of urolithiasis. But, the exact
mechanism how this occurs remains to be elucidated. 相似文献
43.
John Abraham 《British Journal of Sociology of Education》1989,10(1):33-51
This paper explores the relationship between teachers’ general beliefs about sexism in society with their views on sexism in curriculum materials. In so doing, it seeks to elaborate on the nature of teachers’ ideological perceptions of sexism, sex roles and feminism. By analysing sex stereotyping in the school texts of one secondary school for the subjects English, mathematics and French, the research reported in the paper substantiates much of the previous research in this area which has found school texts to be male dominated. In conclusion, the paper suggests that, in certain cases, teacher ideology could be a considerable obstacle to the development of anti‐sexist pedagogies because those teachers who support traditional sex roles tend to resist or devalue anti‐sexist initiatives in education. 相似文献
44.
Abraham Bookstein Shmuel T. Klein Timo Raita 《Information processing & management》1997,33(6):745-760
Many of the most effective compression methods involve complicated models. Unfortunately, as model complexity increases, so does the cost of storing the model itself. This paper examines a method to reduce the amount of storage needed to represent a Markov model with an extended alphabet, by applying a clustering scheme that brings together similar states. Experiments run on a variety of large natural language texts show that much of the overhead of storing the model can be saved at the cost of a very small loss of compression efficiency. 相似文献
45.
Brendan O’Connell Paul De Lange Mark Freeman Phil Hancock Anne Abraham Bryan Howieson 《Assessment & Evaluation in Higher Education》2016,41(3):331-349
Reliable, consistent assessment process that produces comparable assessment grades between assessors and institutions is a core activity and an ongoing challenge with which universities have failed to come to terms. In this paper, we report results from an experiment that tests the impact of an intervention designed to reduce grader variability and develop a shared understanding of national threshold learning standards by a cohort of reviewers. The intervention involved consensus moderation of samples of accounting students’ work, with a focus on three research questions. First, what is the quantifiable difference in grader variability on the assessment of learning outcomes in ‘application skills’ and ‘judgement’? Second, does participation in the workshops lead to reduced disparity in the assessment of the students’ learning outcomes in ‘application skills’ and ‘judgement’? Third, does participation in the workshops lead to greater confidence by reviewers in their ability to assess students’ skills in application skills and judgement? Our findings suggest consensus moderation does reduce variability across graders and also builds grader confidence. 相似文献
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49.
The thyroid hormone profile of a hypothyroid patient, with moderate sized diffuse goiter and history of exogenous thyroid
hormone therapy, was found to be highly ambiguous. The total as well as free T4 levels were consistently high (out of range)
with suppressed T3 (total and free) and elevated thyrotropin levels. We incubated the serum with the radio-iodine labelled
T4 and observed that the patient’s serum bound about 50.5% of the total radioactivity resulting in 85.3% interference in the
radioimmunoassay. On resolving the serum proteins by cellulose acetate electrophoresis, the radioactivity was detected in
the gamma globulin band. The protein profile showed mildly raised levels of IgG. Therefore it was established that the patient’s
serum carried T4 reactive antibodies (IgG) which were interfering in the immunoassays. Elevated anti-thyroid microsomal antibodies
were also present in the patient’s serum. The anti-T4 antibodies were highly specific for T4 and did not show any cross reactivity
with the T3 or its analogues used in the estimation of free T3. We stripped the serum by precipitating the immunoglobulins
and were successful in estimating the levels of free T4 in the stripped serum by single step radioimmunoassy. 相似文献
50.
Droplet-based microfluidic systems enable a variety of biomedical applications from point-of-care diagnostics with third world implications, to targeted therapeutics alongside medical ultrasound, to molecular screening and genetic testing. Though these systems maintain the key advantage of precise control of the size and composition of the droplet as compared to conventional methods of production, the low rates at which droplets are produced limits translation beyond the laboratory setting. As well, previous attempts to scale up shear-based microfluidic systems focused on increasing the volumetric throughput and formed large droplets, negating many practical applications of emulsions such as site-specific therapeutics. We present the operation of a parallel module with eight flow-focusing orifices in the dripping regime of droplet formation for the generation of uniform fine droplets at rates in the hundreds of kilohertz. Elevating the capillary number to access dripping, generation of monodisperse droplets of liquid perfluoropentane in the parallel module exceeded 3.69 × 105 droplets per second, or 1.33 × 109 droplets per hour, at a mean diameter of 9.8 μm. Our microfluidic method offers a novel means to amass uniform fine droplets in practical amounts, for instance, to satisfy clinical needs, with the potential for modification to form massive amounts of more complex droplets. 相似文献