Search results for "Complex"
showing 10 items of 5889 documents
Uniformization of two-dimensional metric surfaces
2014
We establish uniformization results for metric spaces that are homeomorphic to the Euclidean plane or sphere and have locally finite Hausdorff 2-measure. Applying the geometric definition of quasiconformality, we give a necessary and sufficient condition for such spaces to be QC equivalent to the Euclidean plane, disk, or sphere. Moreover, we show that if such a QC parametrization exists, then the dilatation can be bounded by 2. As an application, we show that the Euclidean upper bound for measures of balls is a sufficient condition for the existence of a 2-QC parametrization. This result gives a new approach to the Bonk-Kleiner theorem on parametrizations of Ahlfors 2-regular spheres by qu…
Is there a microbial sub alpha-diversity at soil microscale ?
2012
The distribution of the soil microbial diversity depends on a broad range of environmental filters nested in spatial scales from continent to millimeter. Although microbial biogeography studies have recently shown the influence of environmental factors (texture/pH/plant cover and land-use) on soil microbial abundance and diversity, little is still known about spatial heterogeneity at a micro-scale within soil. Our study aims at describing and understanding the distribution of abundance and diversity of soil microbial communities between different soil microenvironments. Four soils were selected on the basis of differences in physico-chemical properties and historical land-management practic…
Modélisation et simulation multi-agents de la dynamique urbaine : application à la mobilité résidentielle
2007
From a conceptual and methodological reflection about an effective association of system based cellular automata and multi-agents models, the simulation model VisualSimores was conceived in order to give even partially, a response concerning the impact of residential mobility in urban areas. According to the goal to develop a support system for urban planning, the major interest of this approach is to focus on the relationship between two separately observable phenomena: the residential mobility of household on one hand and the urban dynamics on the other hand. Then it becomes particularly important to identify the reasoning that helps to establish a correspondence between the demands of di…
Caratterizzazione geotecnica del comporportamentodi una grande frana in argille varicolori in Sicilia
2014
Si illustrano le misure degli spostamenti e delle pressioni neutre raccolte in un paio d’anni di osservazione del comportamento di un esteso corpo di frana in una formazione di argille varicolori in Sicilia. L’analisi delle misure raccolte indica che la riattivazione riguarda zone distinte del corpo di frana, nelle quali gli spostamenti si sviluppano con velocità e direzioni differenti. L’evoluzione degli spostamenti è manifestamente dipendente dalle condizioni climatiche, dal momento che essi aumentano al crescere delle pressioni interstiziali, a loro volta regolate dalle piogge, e rallentano nella stagione secca, spesso senza annullarsi del tutto. Analisi a ritroso effettuate in una delle…
Novel platinum(II) complexes with heterociclyc ligands: Synthesis and structural chracterization.
2008
An array of mononuclear complexes of Pt(II) with triazine and (benzimidazolyl)pyridine heterocycles is reported. The mononuclear complexes [PtCl2(Kdptdn)] [dbtdn=5,6- diphenyl-3-(2-pyridyl)-1,2,4-triazine-4’,4’’-disulfonate sodium salt hydrate], [PtCl2(bbp)] [bbp=2,6-bis(2-benzimidazolyl)pyridine] and [PtCl2(H2dpt)]PtCl4 [dpt=5,6-diphenyl-3-(2- pyridyl)-1,2,4-triazine] have been prepared and structurally characterized. Both neutral and ionic complexes are present, with bifunctional Pt(II) moieties, whose size and shape enable them to behave as novel scaffolds for DNA binding.
A monumental schola discovered on the Boulevard Frédéric-Latouche in Augustodunum/Autun (Saône-et-Loire)
2013
In 2011, an archaeological evaluation was carried out in the centre of the Roman city of Augustodunum (Autun) on a plot of over 1 ha. This operation afforded the opportunity to explore parts of two insulae along the main street, the so-called cardo maximus, an area that has benefited from recent advances in knowledge. The first insula hosts a high-status domus strongly resembling those of "Balbius Iassus" and the "Étui d’Or", excavated in the vicinity in the 1970s; the second, addressed in this paper, contains the remains of a vast monumental complex covering approximately 900 m2. Most probably built at the beginning of the 2nd c. on the ruins of earlier houses, it was thoroughly restructur…
Ciò che dicono (e non dicono) le Sezioni Unite sul rapporto tra stalking, omicidio aggravato e lesioni aggravate
2022
Le Sezioni Unite hanno chiarito che il reato di omicidio commesso nei confronti della stessa persona offesa del reato di atti persecutori integra un reato complesso. Il presente contributo esamina le conseguenze che questo principio ha sul tema parallelo del rapporto tra il delitto di atti persecutori e il delitto di lesioni personali aggravate perché commesso dall'autore dello stalking nei confronti della stessa vittima. The United Sections have clarified that the crime of homicide committed against the same offended person as the crime of persecutory acts integrates a complex crime. This article examines the consequences that this principle has on the parallel theme of the relationship be…
The soluble terminal complement complex (SC5b-9) up-regulates osteoprotegerin expression and release by endothelial cells: Implications in rheumatoid…
2009
Objective. Complement activation products contribute to a large number of inflammatory diseases, including RA. We have investigated whether osteoprotegerin (OPG) may concur with the soluble terminal complement complex (SC5b-9) to the inflammatory cascade characterizing RA. Methods. Levels of SC5b-9 and OPG in the plasma and SF of patients with active RA were determined by ELISA. The presence of SC5b-9 and OPG in RA synovial lesions was analysed by immunohistochemistry. Cultured endothelial cells were used for in vitro leucocyte/endothelial cell adhesion assays. In addition, endothelial cells were exposed to SC5b-9 in order to evaluate the effects on the production of OPG protein, as well as…
Osteoprotegerin: a new biomarker for impaired bone metabolism in complex regional pain syndrome?
2014
Abstract Osteoprotegerin (OPG) is important for bone remodeling and may contribute to complex regional pain syndrome (CRPS) pathophysiology. We aimed to assess the value of OPG as a biomarker for CRPS and a possible correlation with radiotracer uptake in 3-phase bone scintigraphy (TPBS). OPG levels were analyzed in 23 CRPS patients (17 women; mean age 50 ± 9.0 years; disease duration: 12 weeks [IQR 8–24]), 10 controls (6 women; mean age 58 ± 9.6 years) and 21 patients after uncomplicated fractures (12 women; mean age: 43 ± 15 years; time after fracture: 15 weeks [IQR: 6–22]). The CRPS and control patients also underwent TPBS. OPG in CRPS patients was significantly increased by comparison wi…
Dystroglycan regulates structure, proliferation and differentiation of neuroepithelial cells in the developing vertebrate CNS.
2007
AbstractIn the developing CNS α- and β-dystroglycan are highly concentrated in the endfeet of radial neuroepithelial cells at the contact site to the basal lamina. We show that injection of anti-dystroglycan Fab fragments, knockdown of dystroglycan using RNAi, and overexpression of a dominant-negative dystroglycan protein by microelectroporation in neuroepithelial cells of the chick retina and optic tectum in vivo leads to the loss of their radial morphology, to hyperproliferation, to an increased number of postmitotic neurons, and to an altered distribution of several basally concentrated proteins. Moreover, these treatments also altered the oriented growth of axons from retinal ganglion c…