oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 137 )

2018 ( 190 )

2017 ( 178 )

2016 ( 307 )

Custom range...

Search Results: 1 - 10 of 141133 matches for " Mario V. Capparelli "
All listed articles are free for downloading (OA Articles)
Page 1 /141133
Display every page Item
4-(Dimethylamino)phenyl ethynyl telluride
Joan Farran,Angel Alvarez-Larena,Joan F. Piniella,Mario V. Capparelli
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809009404
Abstract: The title compound, C10H11NTe, is the first organyl ethynyl telluride, R—Te—C[triple-bond]C—H, to be structurally characterized. In the L-shaped molecule, the aryl moiety, viz. Me2NC6H4Te, is almost perpendicular to the Te—C[triple-bond]C—H fragment. The Te—Csp2 bond [2.115 (3) ] is significantly longer than the Te—Csp bond [2.041 (4) ]. The Te—C[triple-bond]C group is approximately linear [Te—C—C = 178.5 (4)° and C[triple-bond]C = 1.161 (5) ], while the coordination at the Te atom is angular [C—Te—C = 95.92 (14)°]. In the crystal structure, there are Csp—H...N hydrogen bonds which are perpendicular to the CNMe2 group; the N atom displays some degree of pyramidalization. Centrosymmetrically related pairs of molecules are linked by Te...π(aryl) interactions, with Te...Cg = 3.683 (4) and Csp—Te...Cg = 159.1 (2)° (Cg is the centroid of the benzene ring). These interactions lead to the formation of zigzag ribbons which run along c and are approximately parallel to (110).
(2,2′-Bipyridine)bis(triphenylphosphine)copper(I) nitrate chloroform solvate hemihydrate
Maribel Navarro,Oscar A. Corona,Teresa González,Mario V. Capparelli
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808006260
Abstract: In the title compound, [Cu(C10H8N2)(C18H15P)2]NO2·CHCl3·0.5H2O, the Cu atom is tetrahedrally coordinated by a bidentate 2,2′-bipyridine ligand and two PPh3 ligands. The Cu—N and Cu—P distances are similar to those observed in similar compounds. The range of coordination angles shows a moderate distortion from ideal tetrahedral geometry. The bipyridine ligand is twisted [14.2 (4)°] about the ring–ring C—C bond. The nitrate anion and the water and chloroform molecules of solvation are disordered. In the crystal structure, there are O(water)—H...O(nitrate), C—H...O(water) and C—H...O(nitrate) hydrogen bonds.
The complex dynamics of the seasonal component of USA's surface temperature
A. Vecchio, V. Capparelli,V. Carbone
Atmospheric Chemistry and Physics (ACP) & Discussions (ACPD) , 2010,
Abstract: The dynamics of the climate system has been investigated by analyzing the complex seasonal oscillation of monthly averaged temperatures recorded at 1167 stations covering the whole USA. We found the presence of an orbit-climate relationship on time scales remarkably shorter than the Milankovitch period {related to the nutational forcing}. The relationship manifests itself through occasional destabilization of the phase of the seasonal component due to the local changing of balance between direct insolation and the net energy received by the Earth. Quite surprisingly, we found that the local intermittent dynamics is modulated by a periodic component of about 18.6 yr due to the nutation of the Earth, which represents the main modulation of the Earth's precession. The global effect in the last century results in a cumulative phase-shift of about 1.74 days towards earlier seasons, in agreement with the phase shift expected from the Earth's precession. The climate dynamics of the seasonal cycle can be described through a nonlinear circle-map, indicating that the destabilization process can be associated to intermittent transitions from quasi-periodicity to chaos.
The complex dynamics of the seasonal component of USA's surface temperature
A. Vecchio,V. Capparelli,V. Carbone
Atmospheric Chemistry and Physics (ACP) & Discussions (ACPD) , 2010, DOI: 10.5194/acp-10-9657-2010
Abstract: The dynamics of the climate system has been investigated by analyzing the complex seasonal oscillation of monthly averaged temperatures recorded at 1167 stations covering the whole USA. We found the presence of an orbit-climate relationship on time scales remarkably shorter than the Milankovitch period {related to the nutational forcing}. The relationship manifests itself through occasional destabilization of the phase of the seasonal component due to the local changing of balance between direct insolation and the net energy received by the Earth. Quite surprisingly, we found that the local intermittent dynamics is modulated by a periodic component of about 18.6 yr due to the nutation of the Earth, which represents the main modulation of the Earth's precession. The global effect in the last century results in a cumulative phase-shift of about 1.74 days towards earlier seasons, in agreement with the phase shift expected from the Earth's precession. The climate dynamics of the seasonal cycle can be described through a nonlinear circle-map, indicating that the destabilization process can be associated to intermittent transitions from quasi-periodicity to chaos.
Caracterización cuantitativa de productos intermedios y residuos derivados de alimentos del Algarrobo (Prosopis flexuosa y P. chilensis, Fabaceae): aproximación experimental aplicada a restos arqueobotánicos desecados
Capparelli,Aylen;
Darwiniana , 2008,
Abstract: experimental approach was used to characterize quantitative macromorphological attributes of intermediate and final food products and residues that might have reached the archaeological record as macrobotanical remains of prosopis chilensis and p. flexuosa (white and black "algarrobo" respectively). general morphology of beans and seeds of these species are provided. unrefined and refined flour, a?apa, aloja and arrope were elaborated following traditional techniques registered by the author along the hualfín valley, catamarca province, argentina, during previous works. it was concluded that quantitative analysis of macrobotanical remains of prosopis, together with qualitative features, allowed the identification of different stages in the preparation and processing of algarrobo. distinguishing between black and white algarroba is essential to interpret prosopis macroremains. the proportion of different categories of seeds and endocarps may help to distinguish the production of unrefined and refined flour. the last one may indicate the elaboration of patay, ulpo or aloja. a?apa and aloja residues are characterized mainly by rolled, folded or loosening of testa seed and their quantities are diminished or increased with respect to the initial amount of flour used depending on entire or fragmented seeds are being considered. the arrope residues are identified by the presence of closed endocarps, which are fully recovered after processing in their totality, and large pieces of epicarp. except for the arrope residues, the majority of the prosopis archaeological assemblage is considered to represent a very low proportion of the ancient processed volume of each dynamic context.
CARACTERIZACIóN CUANTITATIVA DE PRODUCTOS INTERMEDIOS Y RESIDUOS DERIVADOS DE ALIMENTOS DEL ALGARROBO (PROSOPIS FLEXUOSA Y P. CHILENSIS, FABACEAE): APROXIMACIóN EXPERIMENTAL APLICADA A RESTOS ARQUEOBOTáNICOS DESECADOS
Aylen Capparelli
Darwiniana , 2008,
Abstract: Mediante una aproximación experimental se caracterizan los atributos macromorfológicos cuantitativos de productos intermedios y residuales derivados de Prosopis chilensis y P. flexuosa (Algarrobo blanco y Algarrobo negro respectivamente) que potencialmente podrían llegar a formar parte del registro arqueobotánico. Se provee descripción morfoanatómica de la vaina y la semilla de las especies tratadas. Se elaboró harina no refinada y refinada, a apa, aloja y arrope, siguiendo técnicas tradicionalmente utilizadas en el Valle de Hualfín, Catamarca, Argentina, las cuales fueron registradas por la autora en trabajos previos. Se concluye que el análisis cuantitativo de restos macrobotánicos de Prosopis, en conjunto con el cualitativo, permite la identificación de diferentes etapas de procesamiento del Algarrobo. Para ello resulta esencial la distinción entre las dos especies. La proporción de diferentes categorías de semillas y endocarpos es útil para distinguir la harina refinada de la no refinada. Esta última podría indicar la manufactura de patay, ulpo o aloja. Los residuos de la a apa y aloja se caracterizan por presentar semillas con testa plegada, enrollada o levantada, o carecer de ella, y sus cantidades se encuentran disminuidas o aumentadas con respecto a la cantidad inicial de harina utilizada dependiendo de si las semillas que se recuperan son enteras o fragmentadas. Los residuos del arrope se identifican por poseer grandes piezas de epicarpo y porque todos los endocarpos correspondientes a la cantidad de artejos utilizados inicialmente en su preparación se encuentran presentes. Dichos endocarpos se encuentran cerrados, y excepto en el caso de los residuos de arrope, se considera que la mayoría de las asociaciones arqueológicas de restos de Prosopis representa una proporción muy baja del volumen de materia que le dio origen en su contexto dinámico del pasado.
Decisioni della Corte europea e giudicato penale “iniquo”
Bruna Capparelli
Revista Brasileira de Direito Processual Penal , 2016, DOI: http://dx.doi.org/10.22197/rbdpp.v2i1.23
Abstract: O presente artigo aborda uma temática precipuamente envolta no discurso interdisciplinar entre o direito constitucional, direito internacional e direito processual penal, já que analisa os reflexos jurídicos dos pronunciamentos do Tribunal europeu de Direitos humanos à luz do constitucionalismo italiano. Neste aspecto, a corte Constitucional italiana criou uma hipótese especial de “revisao europeia” com a sentenca paradigma número 113 de 2011, a qual, a partir da análise da trajetória legislativa, jurisprudencial e doutrinaria italianos, nos perguntamos se atualmente existe uma norma em capaz de subtrair à sentenca irrevogável a forca executiva que o CPP italiano à atribui e que garanta suficientemente o realizar-se da restitutio in integrum.
Physicochemical Characterization of Photoelectrodes of Ti/TiO2 Prepared by Thermal Oxidation of Titanium  [PDF]
Marcos M. Pedemonte, Alberto L. Capparelli
Energy and Power Engineering (EPE) , 2015, DOI: 10.4236/epe.2015.79038
Abstract: The preparation and study of supported TiO2 for photocatalytic application in solar cell devices is a relevant research field. Thin films of TiO2 prepared on Ti by thermal oxidation in a wide range of temperatures (450°C - 900°C) were characterized by electrochemical impedance spectroscopy, potentiometry and amperometry. This material presents photoelectrochemical activity, which depends dramatically of the oxidation temperature and the exposition time at the studied temperatures. The flatband potential as well as the donor density and the resistance to the charge transfer were measured. All these parameters are temperature dependent, and the optimal values are observed on the photoelectrodes prepared at 750°C. This result is consistent with the photochemical response reported in the literature for thin films of Ti/TiO2 prepared under similar conditions.
Turbulent Diffusion in the Photosphere as Derived from Photospheric Bright Point Motion
V. I. Abramenko,V. Carbone,V. Yurchyshyn,P. R. Goode,R. F. Stein,F. Lepreti,V. Capparelli,A. Vecchio
Physics , 2011, DOI: 10.1088/0004-637X/739/1/1
Abstract: On the basis of observations of solar granulation obtained with the New Solar Telescope (NST) of Big Bear Solar Observatory, we explored proper motion of bright points (BPs) in a quiet sun area, a coronal hole, and an active region plage. We automatically detected and traced bright points (BPs) and derived their mean-squared displacements as a function of time (starting from the appearance of each BP) for all available time intervals. In all three magnetic environments, we found the presence of a super-diffusion regime, which is the most pronounced inside the time interval of 10-300 seconds. Super-diffusion, measured via the spectral index, $\gamma$, which is the slope of the mean-squared displacement spectrum, increases from the plage area ($\gamma=1.48$) to the quiet sun area ($\gamma=1.53$) to the coronal hole ($\gamma=1.67$). We also found that the coefficient of turbulent diffusion changes in direct proportion to both temporal and spatial scales. For the minimum spatial scale (22 km) and minimum time scale (10 sec), it is 22 and 19 km$^{2}$ s$^{-1}$ for the coronal hole and the quiet sun area, respectively, whereas for the plage area it is about 12 km$^{2}$ s$^{-1}$ for the minimum time scale of 15 seconds. We applied our BP tracking code to 3D MHD model data of solar convection (Stein et al. 2007) and found the super-diffusion with $\gamma=1.45$. An expression for the turbulent diffusion coefficient as a function of scales and $\gamma$ is obtained.
A non-existence result on symplectic semifield spreads
Stefano Capparelli,Valentina Pepe
Mathematics , 2015,
Abstract: We prove that there do not exist non-Desarguesian symplectic semifield spreads of PG$(5,q^2)$, $q\geq 2^{14}$ even, whose associated semifield has center containing $\mathbb{F}_q$, by proving that the only $\mathbb{F}_q$-linear set of rank 6 disjoint from the secant variety of the quadric Veronese variety of PG$(5,q^2)$ is a plane with three points of the Veronese surface of PG$(5,q^6)\setminus$PG$(5,q^2)$.
Page 1 /141133
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.