323,371 research outputs found
L'estetica di Elisa Oberti tra metafisica e fenomenologia.
No full textElisa Oberti (1920-1975), la pensatrice milanese che insegnò all'Università Cattolica del S. Cuore dov'era stata allieva di G. Bontadini, formulò nei suoi scritti una teoria estetica che merita oggi di essere riconsiderata nel contesto della filosofia cattolica lombarda, per la curvatura originale con cui le istanze della metafisica e della fenomenologia sono state rese non solo tra loro compatibili ma complici di un disegno al centro del quale Oberti pose l' "oggetto artistico come presenza evidenziata". La teoria obertiana è qui esaminata nello sfondo di una stagione del pensiero cattolico lombardo che ebbe uno dei suoi fulcri dialettici nei convegni filosofici di Gallarate nella prima metà degli anni Cinquanta.
Una nota biografica e una bibliografica corredano questa monografia in memoria di Elisa Oberti a ventidue anni dalla morte
Real-time robust detection of moving objects in cluttered scenes
No full textObject recognition is a very important task in computer vision and different techniques have been presented to solve it. In this paper a Hough-type low-computational algorithm for detection of objects in cluttered scenes is presented. The approach is based on the detection of the shape of an object, modeled by means of a set of corners. An automatically model learning method is introduced. The method is used in an existing video-surveillance system in order to increase its detection performances. Results show that the proposed approach provides good performances with low processing times
The Direct Costs for Cover Crops Cultivation: Comparison Between Different Agronomical Practices
No full textHome AIIA 2022: Biosystems Engineering Towards the Green Deal
Conference paper
The Direct Costs for Cover Crops Cultivation: Comparison Between Different Agronomical Practices
Aldo Calcante, Daniele Manenti & Roberto Oberti
Conference paper
First Online: 01 July 2023
25 Accesses
Part of the Lecture Notes in Civil Engineering book series (LNCE,volume 337)
Abstract
As it is known, cover crops are plants that cover the soil between the harvest of the main crop and the seeding of the later. They are herbaceous species that are not cultivated for their commercial value, but to obtain agronomical and environmental benefits. These species are inserted in the production processes with the primary aim to maintain soil covered by vegetation in periods when the same soil would remain lacking in every cultivation, and therefore subject to damaging effect from pedological point of view. The limits of cover crops are due to their nature. Indeed, since they are crops which do not have a commercial value, the most significant aspect is related to their production costs therefore the incidence of costs for the purchase of seed, for seeding and for the termination must be limited.
The goal of this study is to experimentally evaluate and analyze in details the fuel consumption, the main operative parameters (i.e. workability and hours necessary to carry out every single mechanized activity per hectare) and costs per unit of area for fuel, labor and agrochemical required for the cover crops cultivation, as a function of different agronomical practices applied. In particular, the study takes into account the following agronomical practices: 1) conventional tillage, 2) minimum tillage, 3) direct seeding and 4) no-tillage and, to destroy cover crop, the mechanical and the chemical termination
Stephanitis oberti
No full text<i>Stephanitis oberti</i> (KOLENATI, 1857) <p>D E U D e u t s c h l a n d: Nordrhein-Westfalen, Hamern, 1 Ex., 1. VIII., leg. fA.</p> <p>N L D N i e d e r l a n d e: Gelderland,Wageningen/ Renkum, 25 Ex., 25. VIII. 1997, leg. HE.</p>Published as part of <i>Heiss, Ernst, Eckelt, Andreas, Lederwasch, Manfred, Unterasinger, Romed & T, Familie, 2022, Die Heteropterensammlung Ernst Heiss im Tiroler Landesmuseum Ferdinandeum. Teil V: Tingoidea, Familie Tingidae LAPORTE, 1832, pp. 85-142 in Linzer biologische Beiträge 54 (1)</i> on page 119, DOI: <a href="http://zenodo.org/record/7507194">10.5281/zenodo.7507194</a>
Site preference and local geometry of Sc in garnets: Part II. The crystal-chemistry of octahedral Sc in the andradite-Ca3Sc2Si3O12 join
No full textInvestigation of scandium incorporation in garnets along the synthetic Ca3Fe23+Si3O12-Ca3Sc2Si3O12 (adr-CaSc) join, based on the same multi-technique approach used in the companion paper (Oberti et al. 2006a), shows that (1) Sc is incorporated exclusively at the Y octahedron; (2) the local coordination of Sc is slightly different in Sc-poor than in Sc-rich compositions (Sc-O = 2.06 angstrom in CaSc10 vs. 2.10 angstrom in CaSc30-90); (3) the local coordination of Ca is also slightly different in Sc-poor than in Sc-rich compositions [Ca1,2-O are 2.34(2) and 2.48(2) angstrom in CaSc10 and 2.36(2) and 2.50(2) angstrom in CaSc90, with Delta fixed at 0.14 angstrom in all the samples]; (4) the linear increase of the unit-cell edge along the join derives from multiple changes in the geometry of the different polyhedra and from the rotation of the tetrahedron around the 4 axis (alpha rotation), and cannot be modeled from extrapolation of the behavior observed along the Ca3Al2Si3O12-Ca3Fe23+Si3O12=(grs-adr) join.
CaSc-rich garnets, where a large X dodecahedron coexists with a large Y octahedron and a Z tetrahedron occupied by Si, similar to pyrope-grossular garnets, have the highest a values observed to date in calcium silicate garnets. Slightly lower of values are observed in pyrope and almandine, but correspond to a different structural arrangement, where a small X dodecahedron coexists with a small Y octahedron. These results further confirm the efficiency of a combined short- and long-range approach for understanding the properties of garnet solid solutions
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