985 research outputs found
Accurate evaluation of edges and dip of faults and contacts through the Volume Upward Continuation (VUC) of gravity data
No full textIn this paper we demonstrate the efficiency of a new approach to upward continue potential field data, the Volume Upward Continuation (VUC), coupled with traditional horizontal derivative techniques. By using VUC it is immediate showing that upward continuation of the signal to higher altitudes yield information about progressively deeper sectors of the discontinuity. In particular, looking at the position of the maxima of the horizontal derivative of the continued field, we can observe that they will be laterally shifted toward the dipping direction of the discontinuity, in a way proportional to the continuation height.
We applied VUC followed by horizontal derivative to a gravity profile extracted from a gravity survey on the Venelin-Aksakov fault in Bulgaria, in order to get further information on the dipping direction of this structure
Volume upward continuation of potential fields from the minimum-length solution: an optimal tool for continuation through general surfaces
No full textVolume Continuation of potential fields from the minimum-length solution: An optimal tool for continuation through general surfaces
No full textMany methods have been used to upward continue potential field data.Most techniques employ the Fast Fourier
transform, which is an accurate, quick way to compute level-to-level upward continuation or spatially varying
scale filters for level-to-draped surfaces. We here propose a new continuation approach based on the
minimum-length solution of the inverse potential field problem, which we call Volume Continuation (VOCO).
For real data the VOCO is obtained as the regularized solution to the Tikhonov problem. We tested our method
on several synthetic examples involving all types of upward continuation and downward continuation (levelto-
level, level-to-draped, draped-to-level, draped-to-draped). We also employed the technique to upward
continue to a constant height (2500 m a.s.l.), the high-resolution draped aeromagnetic data of the Ischia Island
in Southern Italy. We found that, on the average, they are consistent with the aeromagnetic regional data
measured at the same altitude. The main feature of our method is that it does not only provide continued data
over a specified surface, but it yields a volume of upward continuation. For example, the continued data refers
to a volume and thus, any surface may be easily picked up within the volume to get upward continuation to
different surfaces. This approach, based on inversion of the measured data, tends to be especially advantageous
over the classical techniques when dealing with draped-to-level upward continuation. It is also useful to obtain
a more stable downward continuation and to continue noisy data. The inversion procedure involved in the method
implies moderate computational costs, which are well compensated by getting a 3D set of upward continued
data to achieve high quality results
Volume upward continuation of potential fields from the minimum-length solution: an application in environmental hazards mapping
No full textWe propose a new approach, based on the
minimum-length solution of the inverse potential field problem.
The method yields a volume upward continuation, and reveals to
be advantageous over the classical techniques when dealing with
truncated anomalies and when draped-to-level upward
continuation is needed. One of the advantages of the novel
approach is that the VUC (Volume Upward Continuation) method
yields a volume upward continuation, and thus it may be used to
extract in a simple way the continuation on any kind of surface
and also to multiple levels
Modelos de negocios enfocados en la economía circular y sus impactos
No full textEl propósito de este trabajo de investigación es demostrar que el modelo de negocio enfocado en la economía circular presenta más ventajas económicas, ambientales y sociales respecto del modelo tradicional de economía lineal. En un breve excursus histórico, analizamos las características del modelo de economía lineal originado en la Revolución industrial para luego llegar a la era de conciencia ambiental: la economía verde y por fin la economía circular. Se tomaron en cuenta, como referencia, prácticas de empresas de diferentes países que operan tanto en el mercado nacional como internacional, implementando el modelo de economía circular. Lo que se dedujo fue que este modelo no sólo no impide el crecimiento económico de la empresa, sino que la beneficia en cuanto al ahorro en la adquisición de materias primas, el ingreso a nuevos mercados y la innovación. Asimismo se observó que el modelo es compatible con los objetivos de sostenibilidad ambiental de la Agenda 2030 de las Naciones Unidas.Fil: Mastellone, Andrés Daniel. Universidad Nacional de San Martín. Escuela de Economía y Negocios; Buenos Aires, Argentin
Assessment of radiation-induced DNA damage and DNA repair polymorphisms in breast cancer patients
No full textIntracellular signaling cascades triggered by the NK1 fragment of hepatocyte growth factor in human prostate epithelial cell line PNT1A
No full textHepatocyte Growth Factor (HGF)/c-MET signaling has an emerging role in promoting cell proliferation,
survival, migration, wound repair and branching in a variety of cell types. HGF plays a crucial role as a
mediator of stromal–epithelial interactions in the normal prostate but the precise biological function of HGF/
c-Met interaction in the normal prostate and in prostate cancer is not clear. HGF has two naturally occurring
splice variants and NK1, the smallest of these HGF variants, consists of the HGF amino terminus through the
first kringle domain. We evaluated the intracellular signaling cascades and the morphological changes
triggered by NK1 in human prostate epithelial cell line PNT1A which shows molecular and biochemical
properties close to the normal prostate epithelium. We demonstrated that these cells express a functional c-
MET, and cell exposure to NK1 induces the phosphorylation of tyrosines 1313/1349/1356 residues of c-MET
which provide docking sites for signaling molecules. We observed an increased phosphorylation of ERK1/2,
Akt, c-Src, p125FAK, SMAD2/3, and STAT3, down-regulation of the expression of epithelial cell–cell adhesion
marker E-cadherin, and enhanced expression levels of mesenchymal markers vimentin, fibronectin, vinculin,
α-actinin, and α-smooth muscle actin. This results in cell proliferation, in the appearance of a mesenchymal
phenotype, in morphological changes resembling cell scattering and in wound healing. Our findings highlight
the function of NK1 in non-tumorigenic human prostatic epithelial cells and provide a picture of the signaling
pathways triggered by NK1 in a unique cell line
LA LINGUA DI LUIGI EINAUDI FRA CLASSICISMO E PATHOS
No full textL’autrice fa una lettura linguistica dei testi di Luigi Einaudi, per individuare i caratteri lessicali, stilistici e retorici degli scritti dell’economista, del divulgatore, del giornalista, del presidente della Repubblica. Su di essi ha pesato a lungo l’etichetta di scrittore nitido, ordinato, algido. In realtà, sottoponendo la sua vastissima produzione scritta a un esame ravvicinato, emerge la straordinaria capacità nell’uso di modalità linguistiche varie: solennità sintattica e affabilità colloquiale, modi popolari e invenzioni lessicali, descrizioni a forti tinte e sobrietà estrema. Valeria Della Valle, The language of Luigi Einaudi between classicism and pathos, in Luigi Einaudi: economic freedom and social cohesion, by Alfredo Gigliobianco, Rome-Bari, 2010, p. 138-154. The author makes a linguistic reading of texts by Luigi Einaudi, to identify the lexical, stylistic and rhetorical characters of the writings of the economist, the popularizer, the journalist, the President of the Italian Republic. On them has long weighed the label of a crisp, neat, icy writer. In fact, subjecting its vast production on close examination, it reveals the extraordinary ability in the use of various language modes: solemnity, friendly conversational syntactic, lexical inventions and popular modes, descriptions with bright colors and extreme simplicity
White middle-class men in Rio de Janeiro. The making of a dominant subject
No full textBased on the biographical accounts of upper-middle-class white men living in wealthy parts of Rio di Janeiro, Valeria Ribeiro Corossacz analyzes specific experiences of whiteness as they are produced at the intersection of multiple categories, in particular gender, class, and sexuality. White middle class men in Rio de Janeiro investigates what it means to be classified as a white person and a man in a society known for its valorization of racial mixing and yet deeply structured by racism, class and gender inequalities. Ribeiro Corossacz focuses on certain experiences in the men’s biographical trajectories representing moments of apprenticeship in a specific model of white, heterosexual and heteronormative middle-class masculinity and describes how these experiences are constructed as normative. This book explores how class, gender and race privilege are mutually produced and perceived by these men as “normal”. Examining instances of silence and what is left unsaid but also these men’s ability to provide precise descriptions of power relations and violent episodes, the author encourages us to observe the condition of dominant subjects as a keystone of the reproduction social discrimination
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