Search results for "Maps"
showing 10 items of 236 documents
Mammographic images segmentation based on chaotic map clustering algorithm
2013
Background: This work investigates the applicability of a novel clustering approach to the segmentation of mammographic digital images. The chaotic map clustering algorithm is used to group together similar subsets of image pixels resulting in a medically meaningful partition of the mammography. Methods: The image is divided into pixels subsets characterized by a set of conveniently chosen features and each of the corresponding points in the feature space is associated to a map. A mutual coupling strength between the maps depending on the associated distance between feature space points is subsequently introduced. On the system of maps, the simulated evolution through chaotic dynamics leads…
Interaction with OGG1 Is Required for Efficient Recruitment of XRCC1 to Base Excision Repair and Maintenance of Genetic Stability after Exposure to O…
2015
International audience; XRCC1 is an essential protein required for the maintenance of genomic stability through its implication in DNA repair. The main function of XRCC1 is associated with its role in the single-strand break (SSB) and base excision repair (BER) pathways that share several enzymatic steps. We show here that the polymorphic XRCC1 variant R194W presents a defect in its interaction with the DNA glycosylase OGG1 after oxidative stress. While proficient for single-strand break repair (SSBR), this variant does not colocalize with OGG1, reflecting a defect in its involvement in BER. Consistent with a role of XRCC1 in the coordination of the BER pathway, induction of oxidative base …
Applying Visual Analysis Methods for mapping Emotions Felt along Daily Trips
2013
International audience; Visual analytics are tools and methods allowing the visual analysis of large sets of movement data. We here use these methods to analyze intra-urban daily trips of individuals as well as the emotion felt by the individuals along their trip. The interdisciplinary research project ECDESUP (Evaluation, Choice and Decision in the use of Urban and Peri-Urban Spaces, www.ecdesup.org/) allowed us to obtain the data via a survey done in the town of Besançon (Eastern France). The first objective was to determine if some places in the city gather a specific type of emotions (either positive or negative) with respect to the day of the week and/or the time of the day. The second…
Perceivability of Map Information for Disaster Situations for People with Low Vision
2019
Digital maps have become increasingly popular in disaster situation to provide overview of information. However, these maps have also created barriers for many people, particularly people with visual impairments. Existing research on accessible maps such as tactile and acoustic maps focuses on providing solutions for blind persons to be able to perceive the information digital maps present. For people with low vision, who often rely on magnifier, good contrast and good navigation support, current digital map solutions present many challenges. In this paper we have studied two types of digital maps and their related surrounding text in the home page of disaster applications. The study focuse…
Common fixed point theorems for multi-valued maps
2012
Abstract We establish some results on coincidence and common fixed points for a two-pair of multi-valued and single-valued maps in complete metric spaces. Presented theorems generalize recent results of Gordji et al [4] and several results existing in the literature.
Rademacher Theorem for Fréchet spaces
2010
Abstract Let X be a separable Frechet space. In this paper we define a class A of null sets in X that is properly contained in the class of Aronszajn null sets, and we prove that a Lipschitz map from an open subset of X into a Gelfand-Frechet space is Gateaux differentiable outside a set belonging to A. This is an extension to Frechet spaces of a result (see [PZ]) due to D. Preiss and L. Zajicek.
Internal inverse limits and retractions
2015
We establish equivalences between compacta that admit a sequence of retractions that converge uniformly to the identity map and compacta that are inverse limits on subcompacta with retractions for bonding maps. We give partial answers to questions of Charatonik and Prajs, and of Krasinkiewicz. Our results are related to and use results from another paper of the authors \cite{mp}.
Common Fixed Point Theorems for Weakly Compatible Maps Satisfying a General Contractive Condition
2008
We introduce a new generalized contractive condition for four mappings in the framework of metric space. We give some common fixed point results for these mappings and we deduce a fixed point result for weakly compatible mappings satisfying a contractive condition of integral type.
MR3039719 Reviewed Wang, Lidong; Liu, Heng; Gao, Yuelin Chaos for discrete dynamical system. J. Appl. Math. 2013, Art. ID 212036, 4 pp. (Reviewer: Ga…
2013
In this paper the authors show the relation between the definitions of Li-Yorke chaos and distributional chaos in discrete dynamical systems. In particular, after listing the main definitions and reviewing the known results, the authors prove that: • a discrete dynamical system is chaotic in the sense of Martelli and Wiggins when it exhibits transitive distributional chaos; • a discrete dynamical system is distributively chaotic in a sequence when it is chaotic in the strong sense of Li-Yorke. Finally, the authors prove a sufficient condition for the dynamical system to be chaotic in the strong sense of Li-Yorke.
«Between Piante and Libri primi». Territory, writing and rights of an ecclesiastic institution. Monreale, XV-XVIIth centuries
2018
The article focuses on the genesis, organization and representation of the territory of an important ecclesiastical institution of Early Modern Sicily, the Archbishopric of Monreale, in a microanalytic perspective. Such an historical space has its very own peculiar economic, juridical, political and institutional features, as it includes and is part of dense, stratified and at the same time heterogeneous and changing realities. This research aims to shed some light on the close relationship between the Archbishopric as a holder of feudal rights on land and on men, and the production of written and drawn documents. Cross-referencing a variety of sources, such as maps and fiscal, judicial and…