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31.
Industrial Computed Tomographic (ICT) imaging systems based on X-rays require a high stability source. This emanates from
the fact that in a computed tomographic imaging system, statistical variation inherent in the penetrating radiation used to
probe the specimen, electronic noise generated in the detection system and reconstruction errors play an important role in
the overall quality of the image. A conventional industrial X-ray machine used for routine radiography work is not suitable
for tomographic imaging applications because of its output dose variations. In this paper, an experiment is described to utilise
a general-purpose 160 kV constant potential industrial X-ray machine with significant ripple in its output beam, in an experimental
Computed Industrial Tomographic Imaging System (CITIS) developed at Isotope Applications Division of Bhabha Atomic Research
Centre. Studies carried out include the analysis of temporal profile of X-ray beam intensity and online averaging of detected
signals for the minimization of periodic ripple, which mainly showed up, at the power line frequency. A tomographic image
of a typical specimen, reconstructed with the processed projection data is analysed. It was observed that the mean value of
reconstructed linear absorption coefficients and standard deviation computed over a window within a constant density region
of the object were stable 相似文献
32.
Gheorghita Ghinea Simon Kent Andrew O Frank Gurudain Singh Chana 《IEEE transactions on information technology in biomedicine》2007,11(5):595-597
Traditional approaches to gathering and visualizing pain data rely on two-dimensional (2-D) human body models, where different types of sensation are recorded with various monochrome symbols. We propose an alternative that uses a three-dimensional (3-D) representation of the human body, which can be marked in color to visualize and record pain data. 相似文献
33.
Archita Sharma Gursharan Singh Shailendra Kumar Arya 《International Journal of Hydrogen Energy》2021,46(4):3270-3288
Looking at the past decades, intense efforts have been made on one of the flourishing technology called biofuel cells with respect to the power or energy crisis prevailing all over the globe. Global researchers are taking part in the development of biofuels cells by exploiting novel characteristics of unconventional materials at atomic and molecule level like nanotubes (carbon nanotubes), nanosheets, nanoparticles, conducting polymers, etc in order to generate effective electricity from the substrates of biological origin via utilizing various biocatalysts. With the advancement in the field of nanotechnology, significant discoveries with respect to the field of biofuel cells have been accomplished. But till date, there has been a significant challenge regarding the performance and efficiency of the biofuels cells. Nowadays, to generate high power, an efficient and skillful approach which consists of the implementation of nano-based materials and conducting polymers with respect to the assembly of the biofuel cells is being considered by many researchers. Bioenergy and biofuels is a potential contestant for alternative fuel and with regard to this nanotechnology is one such significant weapon to synthesize and modify the production of biofuel and bio-energy. It has been assumed that in the near future with such extensive research biofuel cells will take up the economy of a nation in a sustainable way. This review gives the insights of biofuel cells and their types, brief synopsis of applications of the biofuel cells along with the scrutiny of biofuel cells in the market. Significant discussions have been provided in this review relating to the nanomaterials being employed as an electrode in biofuel cells. Certain examples have been mentioned to justify the concept of biofuel cell nanodevices following the ethical considerations of the same. 相似文献
34.
Neural Computing and Applications - Languages help to unite the world socially, culturally and technologically. Different natives communicate in different languages; there is a tremendous... 相似文献
35.
Evaluated the contribution of several cognitive factors (tolerance of ambiguity, impermeability of present belief system, and cognitive quest) and emotional factors (perception of childhood relationship with parents, and childhood and adolescence stress and trauma) in precipitating religious conversion. Ss were 40 religious converts (aged 20–40 yrs) from 4 religious groups (Jewish, Catholic, Bahai, and Hare Krishna) and 30 age-matched religiously affiliated nonconverts (Jewish and Catholic). Converts' present belief systems were judged as more impermeable; but contrary to the cognitive hypotheses, the groups did not differ on several measures of tolerance of ambiguity and in degree of cognitive quest during adolescence. Emotional factors were more closely associated with religious conversion. Converts' perceptions of their parents were markedly more negative, and incidence of father absence was higher in the convert sample. Converts reported more traumatic events during childhood and described their childhood and adolescence as unhappy. In the interview with converts, personal stress was also reported more often than cognitive quest as characterizing the 2-yr period preceding conversion and as involved in the immediate consequences of conversion. (23 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
36.
37.
Reports an error in the original article by J. R. Troisi, II and Chana Akins (Experimental and Clinical Psychopharmacology, 2004, Vol. 12, No. 4, pp. 237-242). The first sentence of the abstract, "Two groups of male Japanese quail (Coturnix japonica) to discriminate cocaine from saline in a conditioned approach procedure maintained by sexual reinforcement," was incomplete. The correct wording is "Two groups of male Japanese quail (Coturnix japonica) were trained to discriminate cocaine from saline in a conditioned approach procedure maintained by sexual reinforcement." (The following abstract of this article originally appeared in record 2004-20800-003.) Two groups of male Japanese quail (Coturnix japonica) to discriminate cocaine from saline in a conditioned approach procedure maintained by sexual reinforcement. For 1 group, cocaine (10 mg/kg ip) was administered prior to a conditioned stimulus (CS) that predicted copulation; saline followed by a CS predicted no copulation. A second group underwent the opposite training regimen. Results revealed apparent between-group differences in the rates of acquisition of the discrimination; however, during extinction trials, both groups responded more under the drug condition that predicted the female than to the condition that predicted no female. The results suggested that a drug discrimination may be maintained by sexual reinforcement. The findings are discussed with regard to interactions of cocaine and sexual reward, as well as to Pavlovian conditional stimulus control (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
38.
Shun Por Li Kenneth M. Feld Chana R. Kowarski 《Drug development and industrial pharmacy》1997,23(7):623-631
The preparation of sustained-release (SR) drug pellets and their tablets was evaluated. Pellets containing indomethacin, pseudoephedrine hydrochloride (P-HCl), or pseudoephedrine (P) base were prepared by spraying a mixture of drug, Eudragit S-100 resins, dibutyl sebacate, and alcohol onto nonpareil seeds via the Wurster-column process. The oven-dried drug/Eudragit S-100 (DS) pellets were coated with different levels of Eudragit RS and Eudragit S-100 acrylic resins. Tablets containing P-HCl or P-base SR pellets, microcrystalline cellulose, and Methocel K4M were compressed. The solubility of the drug entity in the polymer solution was found to be the most critical factor affecting the yield and the physical properties of the resultant DS pellets. Dissolution studies of Eudragit RS coated drug pellets demonstrated that the release profiles depended not only on the physicochemical properties of the drug, particularly aqueous solubility, but also on the coating levels. The release rate profiles of the matrix tablets can be modified by varying the types of P-HCl or P-base SR pellets in the formulation. The release of drug from the matrix tablets is primarily matrix controlled. 相似文献
39.
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