Search results for "Cone"
showing 10 items of 772 documents
La neologia: un nou camp a la cerca de la seva consolidació científica
2015
En aquest text s’ofereix una panoràmica àmplia de la neologia com a camp de coneixement i com a camp de treball. Així mateix s’exploren les relacions que la neologia manté amb altres matèries com la psicologia i la sociologia, i les seves connexions amb les tecnologies. Els neologismes són l’objecte central de la neologia com a camp de coneixement. L’article mostra la dificultat de delimitar clarament aquest objecte per tal com es tracta d’un objecte relatiu, a més de polièdric. La relativitat dels neologismes obliga a definir-los sobre la base d’establir un punt de referència a partir del qual una unitat és neològica en funció de la producció, de la recepció o de la circulació social. L’ar…
«Ciència. Revista catalana de Ciència i Tecnologia»
2011
Des del punt de vista de la història de la ciència, ens permet resseguir quins eren els temes que preocupaven la comunitat científica de l’època, els desfasaments respecte a altres països i quin paper jugava la transmissió i la divulgació de la ciència en l’imaginari col·lectiu català d’aleshores. «Ciència» va ser una revista mensual editada a Barcelona des de l’any 1926 fins a 1933. Amb el subtítol de «Revista Catalana de Ciència i Tecnologia», des del primer moment es va marcar com a objectiu crear un espai editorial vehiculat en català que potenciara la transmissió i divulgació del coneixement cientificotècnic. Naix per a ocupar el buit que havia deixat l’Institut d’Estudis Catalans, cla…
Sobre el origen de la cognición
2008
El presente artículo se ocupa de examinar dos teorías sobre el origen de la cognición. La primera de ellas es una teoría neurobiológica de los autores V. Mountcastle y J. Hawkins, pero trabajando independientemente el uno del otro. La segunda teoría pertenece a la Psicología Cognitiva y es de D. Gentner. Es interesante comprobar la fuerte congruencia que existe entre ambas teorías a pesar de tener, naturalmente, metodologías totalmente diferentes. Por dos caminos distintos se llega a postular la analogía y sus mecanismos como el principal elemento de la cognición. El presente trabajo da razones para contemplar la analogía como la causa principal del origen del conocimiento en el niño/a. Ade…
La ignorada acción directa del arrendatario-usuario en el contrato de leasing
2020
En los contratos de leasing cuando el usuario resuelve la compraventa del bien arrendado por inhabilidad absoluta “aliud pro alio” se producen daños patrimoniales personales del actor. Estos daños no tienen cabida en la cesión de acciones que efectúa la sociedad de leasing. La acción directa es el único mecanismo jurídico que permite reclamar esos daños. In leasing contracts when the user resolves the sale of the leased property by absolute inability “aliud pro alio”, damages usually take place in its patrimony
Prevalence and morphometric analysis of the retromolar canal in a Spanish population sample: a helical CT scan study.
2021
BACKGROUND: The retromolar canal (RMC) is an anatomical variation of the mandibular canal (MC) whose identification and study should be considered given its implication in the surgical procedures of the retromolar area. The prevalence of the RMC widely varies according to previous studies and may be influenced by the followed study method. This work aimed to evaluate the prevalence of the RMC in a Spanish population sample. MATERIAL AND METHODS: For this purpose, 225 CT scan images (with a higher resolution than the cone beam CT used in other previous studies) from the Hospital Clinico Universitario de Valencia were analyzed. The Osirix MD radiological image analysis system was applied to a…
Che cosa è la mafia
2016
L'introduzione critica al classico testo di Gaetano Mosca "Che cosa è la mafia" viene messa a confronto con la discussa interpretazione del odierno fenomeno mafioso data dal giudice Giovanni Falcone con la tesi della non esistenza del terzo livello rintracciabile invece nella ottocentesca analisi di Mosca.
Two examples related to conical energies
2022
In a recent article we introduced and studied conical energies. We used them to prove three results: a characterization of rectifiable measures, a characterization of sets with big pieces of Lipschitz graphs, and a sufficient condition for boundedness of nice singular integral operators. In this note we give two examples related to sharpness of these results. One of them is due to Joyce and M\"{o}rters, the other is new and could be of independent interest as an example of a relatively ugly set containing big pieces of Lipschitz graphs.
Hardwiring the Brain: Endocannabinoids Shape Neuronal Connectivity
2007
The roles of endocannabinoid signaling during central nervous system development are unknown. We report that CB 1 cannabinoid receptors (CB 1 Rs) are enriched in the axonal growth cones of γ-aminobutyric acid–containing (GABAergic) interneurons in the rodent cortex during late gestation. Endocannabinoids trigger CB 1 R internalization and elimination from filopodia and induce chemorepulsion and collapse of axonal growth cones of these GABAergic interneurons by activating RhoA. Similarly, endocannabinoids diminish the galvanotropism of Xenopus laevis spinal neurons. These findings, together with the impaired target selection of cortical GABAergic interneurons lacking CB 1 Rs, identify endoc…
Genistein in the Metabolic Syndrome: Results of a Randomized Clinical Trial
2013
Context: This study was performed to evaluate the effects of genistein on metabolic and cardiovascular risk factors in Caucasian postmenopausal subjects with metabolic syndrome (MetS). Objective: Our objective was to assess the effects of genistein on surrogate endpoints associated with diabetes and cardiovascular disease. Design and Setting: This was a randomized, double-blind, placebo-controlled trial at 3 university medical centers in Italy. Patients: Patients included 120 postmenopausal women with MetS according to modified Third Report of the National Cholesterol Education Program (NCEP), Expert Panel on Detection, Evaluation and Treatment of High Blood Cholesterol in Adults (Adult Tre…
Artefacts in CBCT: a review
2011
Artefacts are common in today's cone beam CT (CBCT). They are induced by discrepancies between the mathematical modelling and the actual physical imaging process. Since artefacts may interfere with the diagnostic process performed on CBCT data sets, every user should be aware of their presence. This article aims to discuss the most prominent artefacts identified in the scientific literature and review the existing knowledge on these artefacts. We also briefly review the basic three-dimensional (3D) reconstruction concept applied by today's CBCT scanners, as all artefacts are more or less directly related to it.