325,550 research outputs found
Il problema della verita in S. Tommaso d\u27Aquino. passi scelti dalla Somma Teologica e da altre opere tomistiche
No full textIl problema della verità in S. Tommaso d\u27Aquino : passi scelti dalla Somma Teologica e da altre opere tomistiche / con introduzione, inquadramento e interpretazione di Siro Contri. - Torino [etc.] : Societa editrice internazionale, stampa 1925
Dedica manoscritta del curatore: Al prof. on. Emilio / Bodrero / in segno di vivo omaggio / memore della benevolenza / Siro Contri / Bologna. Istituto magistrale / 18 marzo 1926.
https://galileodiscovery.unipd.it/discovery/fulldisplay?context=L&vid=39UPD_INST:VU1&search_scope=MyInst_and_CI&tab=Everything&docid=alma99000550073020604
Swelling process induced by Focused Ion Beam on magnetic layers
No full textThe ability to prepare ordered arrays of micro/nano sized magnetic elements offers the chance to investigate magnetic properties at length scales previously inaccessible. Bi-dimensional ordered array of magnetic dots can be obtained through a number of different techniques.
Patterning of extended magnetic layers or multilayers by Focused Ion Beam (FIB) is one of the most powerful approaches for nano-structuration on a large variety of materials due to the high spatial resolution, good process control and elevated flexibility. This enables a very high accuracy to be achieved in the refinement (shape, sharpness, orientation and dimension) of each individual element and of the separation between the elements. On the other hand ion interactions with solids produce several damage effects. These effects can be very severe in the case of crystalline solids and of nano-sized elements, and can influence magnetic properties of the systems (magneto-crystalline and configurational anisotropy).
We studied by AFM and Depth Profile Auger analysis the ions effect on a submicron scale dots array obtained on a 10nm Fe/10nm NiO/MgO(001) multilayer capped with 10nm of MgO. Ion-induced local damage leads to a significant swelling effect on the nano-structures [1]. Our measurements suggest that swelling observed on the multilayer originates from substrate ion irradiation.
Transmission Electron Microscopy and diffraction technique measurements should give structural information and clarify the relations between ion induced damage and swelling effect.
[1] G. C. Gazzadi, P. Luches, S. F. Contri, A. di Bona, S. Valeri, Nucl. Instr. Meth. B 230 (2005) 512
Morphology of H2O dosed monolayer MgO(001)/Ag(001)
No full textCombining scanning tunneling microscopy (STM) and X-ray photoelectron (XPS) as well as Auger spectroscopy, we establish a direct relationship between the morphology and the excitation spectra of ultrathin MgO(0 0 1) films on Ag(0 0 1), and we show that monolayer MgO(0 0 1) films do not exhibit significant morphology changes upon H2O dosage, with the constituent islands remaining monoatomically flat up to exposures of tens of Langmuir
Hydrolysis at MgO(100)/Ag(100) oxide-metal interfaces studied by O 1s x-ray photoelectron and Mg KL{23}L{23} Auger spectroscopy
No full textUsing O 1s x-ray photoelectron and Mg KL23L23 Auger spectroscopy, we demonstrate that monolayerMgO100/Ag100 exposed at 300 K to H2O vapor pressure of 10−8 Torr is strongly hydrated up to 0.8 H2Oper MgO formula unit, half of the water molecules being dissociatively adsorbed at the fourfold coordinatedsurface oxide sites. These dramatic hydrolysis and molecular adsorption phenomena are strikingly differentfrom those observed at perfect bulklike MgO100 surfaces, and provide strong experimental support to theconcept of unprecedented interactions and properties at oxide-metal interfaces
A comparative stereological study of the term placenta in the Donkey, Pony and Thoroughbred
No full textThe aim of the study was to compare horse and donkey placentae using stereological techniques. Term placentae were collected at spontaneous foaling from seven Thoroughbred mares, seven pony mares, and six jenny donkeys. Maternal and foal weights were recorded and the mass, volume, and gross area of each allantochorion was also recorded. Ten random biopsies were recovered and processed for light microscopy from which the surface density of the microcotyledons (S(v)) and the total microscopic area of fetomaternal contact were calculated stereologically. Gestation length was longer in the donkeys than the other two groups (median values: 371 vs. 327 and 341 days, P < 0.05). There were significant correlations between foal birthweight and gross area (rho = 0.89; n = 20; P < 0.05), mass (rho = 0.84; n = 20; P < 0.05) and volume (rho = 0.89; n = 20; P < 0.05) of the allantochorion. S(v) was higher in the donkey placenta than the other groups (median values: 0.05 vs. 0.03 and 0.04 microm(-1), P < 0.05) although placental efficiency was lower in the donkeys (median values: 0.87 vs. 1.33 and 1.32 kg/m2, P < 0.01). The results of the study confirmed that, although strong morphological similarities exist between the allantochorion of the horse and donkey, that of the donkey develops more complex microcotyledons, as judged stereologically, and exhibits a lower placental efficiency. These differences may be related to maternal genotype and/or the longer gestation length shown by the donkey compared to the horse, but a negative correlation (rho = -0.92, P < 0.01) was also found between age and placental efficiency in donkeys.[...
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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