323,351 research outputs found
A project of digital mammograph based on GaAs pixel detector and on a self-triggering single photon counting acquisition system
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A Novel morphological approach to volume extraction in 3D tomography
No full textExtracting a region of interest from volumetric data represents an important task in the field of digital image analysis. Several approaches to this problem are proposed in literature. The present paper affords volume extraction for regions of interest whose characteristics are not known a-priori. This is the case, for instance, of cancerous tissues in medical tomography or defects in industrial tomography. The technique here described allows extraction of completely arbitrary shapes with a minimum interaction with the user. The volume of interest is defined through the semi-automatic selection of a small set of rail contours at different planes. Such contours are then blended through a morphing technique in order to interpolate the cutting surface. The overall technique demonstrates to be intuitive, efficient and robust. Some results are reported where the method has been applied to micro-tomographic measurements
Resolving clinicians queries across a grid infrastructure
No full textF. Estrella (1) , C. del Frate (2) , T. Hauer (1), R. McClatchey (1) , M. Odeh (1) , D. Rogulin (1) , S. R. Amendolia (3), D. Schottlander (4) , T. Solomonides (1) , R. Warren(5
Observation of Top Quark Production in ¯pp Collisions with the CDF Detector at Fermilab
No full textWe establish the existence of the top quark using a 67 pb \Gamma1 data sample of ¯ pp collisions at p s = 1.8 TeV collected with the Collider Detector at Fermilab (CDF). Employing techniques similar to those we previously published, we observe a signal consistent with t ¯ t decay to WWb ¯ b, but inconsistent with the background prediction by 4:8oe. Additional evidence for the top quark is provided by a peak in the reconstructed mass distribution. We measure the top quark mass to be 176 \Sigma 8(stat:) \Sigma 10(sys:) GeV/c 2 , and the t ¯ t production cross section to be 6:8 +3:6 \Gamma2:4 pb. The CDF Collaboration F. Abe, 14 H. Akimoto, 32 A. Akopian, 27 M. G. Albrow, 7 S. R. Amendolia, 24 D. Amidei, 17 J. Antos, 29 C. Anway-Wiese, 4 S. Aota, 32 G. Apollinari, 27 T. Asakawa, 32 W. Ashmanskas, 15 M. Atac, 7 P. Auchincloss, 26 F. Azfar, 22 P. Azzi-Bacchetta, 21 N. Bacchetta, 21 W. Badgett, 17 S. Bagdasarov, 27 M. W. Bailey, 19 J. Bao, 35 P. ..
Images of soft materials: a 3D visualization of interior of the sample in terms of attenuation coefficient
No full textImages of soft materials are obtained using image intensifier based X-ray system (Rao et al., Nucl. Instr. and Meth. A 437 (1999) 141). The interior of the soft material is visualized using the novel software in order to know the distribution of attenuation coefficient in terms of density. The novel software is based mainly on graphical library and applicable to several operating systems without any change. It can be applied to several applications starting from biomedical to industries, for example, quality control. The results for walnut and brew tooth are presented as a set of images from the internal parts of the sample. A description of the principal parameters required for tomographic visualization is given and some results based on this technique are reported and discussed
Classification and quantitation of 1H NMR spectra of aldithiols binary mixtures using artificial neural networks
No full textSeasonal spatial ecology of the wild boar in a peri-urban area
No full textThe parallel expansion of anthropogenic environments and wild boar Sus scrofa populations has favoured the intrusion of the species into many European metropolitan areas, including Rome. In this study, we used Maxent to analyse the seasonal spatial ecology of the wild boar in Marcigliana natural reserve, a rural area located in the northeastern suburbs of Rome. The wild boar avoided urban settlements year-round. In the growing season, it had a higher probability of occurring with an increasing presence of turkey oak Quercus cerrioides woods, but seemed to be partially adapted to the presence of arable lands, which had a marked negative effect only when very abundant. These results lead us to hypothesise that the species in this part of the year adopts a spatial strategy which optimises the trade-off among the need for thermal cover and food resources. In autumn and winter, the species avoided meadows and pastures. The analysis of wild boar spatial ecology in metropolitan areas is essential to provide important information contributing to the development of effective plans for managing peri-urban populations and mitigating conflicts with humans
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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