Mobile Codes Localization in Ad hoc Networks: a Comparative Study of Centralized and Distributed Approaches

This paper presents a new approach in the management of mobile ad hoc networks. Our alternative, based on mobile agent technology, allows the design of mobile centralized server in ad hoc network, where it is not obvious to think about a centralized management, due to the absence of any administration or fixed infrastructure in these networks. The aim of this centralized approach is to provide permanent availability of services in ad hoc networks which are characterized by a distributed management. In order to evaluate the performance of the proposed approach, we apply it to solve the problem of mobile code localization in ad hoc networks. A comparative study, based upon a simulation, of centralized and distributed localization protocols in terms of messages number exchanged and response time shows that the centralized approach in a distributed form is more interesting than a totally centralized approach.Comment: 14 Pages, IJCNC Journal 201

Les Intoxications Accidentelles Par Les Pesticides Au Maroc Entre 2008-2014: Evolution Et Facteurs De Risque

The aim of this study was to determine the epidemiological profile of accidental poisoning by pesticides. A retrospective study of poisoning cases, declared between January 2008 to December 2014 at the Moroccan Anti poisoning and Pharmacovigilance Center (MAPPC), was conducted. During the study period, 4 110 acute accidental poisoning by pesticides cases were collected. The average age was of patients 19, 24±0,25 years. The sex-ratio (female/male) was 0.95. Poisoning mainly concerned adults between the ages of 20 and 74 (about 43%). The pesticide poisoning occurs more often in urban zones with 54.1%. These were mainly poisonings that occurred at home in 70.5% of cases. Patients were mostly symptomatic (about 65%), these poisonings occurred mainly during the spring mostly in the spring (32%) and summer (29%). Insecticides were the most commonly incriminated in 64, 13% of cases, followed by rats, pesticides, and herbicides with respectively 29%, 3.42% and 0.85%. The declarations came from all regions of Morocco, the highest incidence was recorded in the Tadla-Azilal region (4.04 per 100 000 inhabitants). The Fes Boulemane region showed a significant lethality of 6.43%. Among the 3,077 patients for whom the evolution was known, 98.1% had progressed favorably. 47 cases of death were recorded with a lethality of 1.2%

Les Intoxications Volontaires Par Les Pesticides Dans La Région De Rabat-Salé -Zemmour- Zaer Entre 2008 Et 2014

The objective of this study is to describe the epidemiological characteristics and the risk factors for voluntary poisoning by pesticides in the Rabat-Salé-Zemmour-Zaer region between 2008 and 2014. This is a retrospective study of cases of voluntary poisoning by pesticides collected between 2008 and 2014 by the Anti-poisoning and Pharmaco-vigilance Center of Morocco. During the study period, 598 cases of voluntary pesticide intoxication were collected. These voluntary intoxications mainly concerned adults whose age is between 20 and 74 years. Female addicts dominated the scene with 61.87% and a sex ratio (F / H) of 2.02 in favor of female sex, with urban predominance. The risk was related to the use of raticides (195 cases). The evolution was favorable in 94% of cases, with 27 people dying during this period

Enterococcus faecalis utilizes maltose by connecting two incompatible metabolic routes via a novel maltose-6-P phosphatase (MapP)

Similar to Bacillus subtilis, Enterococcus faecalis transports and phosphorylates maltose via a phosphoenolpyruvate (PEP):maltose phosphotransferase system (PTS). The maltose-specific PTS permease is encoded by the malT gene. However, E. faecalis lacks a malA gene encoding a 6-phospho-a-glucosidase, which in B. subtilis hydrolyses maltose 6-P into glucose and glucose 6-P. Instead, an operon encoding a maltose phosphorylase (MalP), a phosphoglucomutase and a mutarotase starts upstream from malT. MalP was suggested to split maltose 6-P into glucose 1-P and glucose 6-P. However, purified MalP phosphorolyses maltose but not maltose 6-P. We discovered that the gene downstream from malT encodes a novel enzyme (MapP) that dephosphorylates maltose 6-P formed by the PTS. The resulting intracellular maltose is cleaved by MalP into glucose and glucose 1-P. Slow uptake of maltose probably via a maltodextrin ABC transporter allows poor growth for the mapP but not the malP mutant. Synthesis of MapP in a B. subtilis mutant accumulating maltose 6-P restored growth on maltose. MapP catalyses the dephosphorylation of intracellular maltose 6-P, and the resulting maltose is converted by the B. subtilis maltose phosphorylase into glucose and glucose 1-P. MapP therefore connects PTS-mediated maltose uptake to maltose phosphorylase-catalysed metabolism. Dephosphorylation assays with a wide variety of phosphosubstrates revealed that MapP preferably dephosphorylates disaccharides containing an O-aglycosyl linkageFil: Mokhtari, Abdelhamid. Institut National de la Recherche Agronomique. Microbiologie de l’Alimentation au Service de la Santé Humaine; Francia. University Mentouri. Faculty of Natural Science and Life. Department of Biochemistry-Microbiology. Laboratory of Environmental Biology; ArgeliaFil: Blancato, Victor Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Biología Molecular y Celular de Rosario; ArgentinaFil: Repizo, Guillermo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Biología Molecular y Celular de Rosario; ArgentinaFil: Henry, Céline. Institut National de la Recherche Agronomique. Microbiologie de l’Alimentation au Service de la Santé Humaine; FranciaFil: Pikis, Andreas. Center for Drug Evaluation and Research. Food and Drug Administration; Estados UnidosFil: Bourand, Alexa. Institut National de la Recherche Agronomique. Microbiologie de l’Alimentation au Service de la Santé Humaine; FranciaFil: Alvarez, Maria de Fatima. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Instituto Superior de Investigaciones Biológicas; ArgentinaFil: Immel, Stefan. Technische Universität Darmstad. Institut für Organische Chemie; AlemaniaFil: Mechakra Maza, Aicha. University Mentouri. Faculty of Natural Science and Life. Department of Biochemistry-Microbiology. Laboratory of Environmental Biology; ArgeliaFil: Hartke, Axel. Universite de Caen Basse Normandie; FranciaFil: Thompson, John. National Institutes of Health. Laboratory of Cell and Developmental Biology. Microbial Biochemistry and Genetics Section; Estados UnidosFil: Magni, Christian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Biología Molecular y Celular de Rosario; ArgentinaFil: Deutscher, Josef. Institut National de la Recherche Agronomique. Microbiologie de l’Alimentation au Service de la Santé Humaine; Franci

Poss-OWL 2: Possibilistic Extension of OWL 2 for an Uncertain Geographic Ontology

AbstractThe use of ontologies to represent geographical knowledge has received a lot of attention recently. Nevertheless, classical ontol- ogy languages are not able to represent incomplete and uncertain knowledge, which are very important characteristics of several situations in geographic domain. Based on our previous work, we propose a solution for handling uncertainty and for dealing with inconsistency in geographical applications. In this paper, we present an extension of the OWL 2, named Poss-OWL 2, based on our Poss - SROIQ(D) description logic (DL). Then we describe some reflections about the inference system. Illustrative examples, from archaeological domain, are given

Temporal Context-Based Delegation

In this paper, we put forward a dynamic delegation model based on a temporal context. Delegation is the process of granting a specific authorization from a user to another user of the same system to carry out some functions on his behalf. Despite the importance of delegation, it is formalized in very little security policies because of its complexity. Indeed delegation provides resiliency and flexibility regarding the management procedure. Our goal consists of redefining delegation for OrBAC using temporal nonmonotonic description logic. OrBAC is an access control model; it provides the mean to specify contextual authorizations, which facilitates modeling delegation features such as temporary delegation, multiple delegation, revocation, etc. The description logic that we use for the re-formalization process is TDLδε. This logic gives the mean to specify nonmonotonic authorizations and a better representation of the temporal aspects specific to a given delegation. The motivation behind this new representation is to augment the expressivity of the new model to offer a better way to represent and to manage the delegation’s characteristics

Dynamic Delegation Based on Temporal Context

AbstractDelegation is a very important part of the administrative process in access control systems; it provides resiliency and flexibility regarding to the management procedure. Delegation is the process of granting a specific authorization from a user to another user of the same system to carry out some functions on his behalf. The delegation, although widely used, is modeled in very little security policies because of its complexity. In this paper we aim to consider the delegation dynamically based on temporal context, to this end we redefine delegation for OrBAC using temporal nonmonotonic description logic. OrBAC is an access control model; it provides the mean to specify contextual authorizations, which facilitates modeling delegation features such as temporary delegation, multiple delegation, revocation, etc. The description logic that we use for the re-formalization process is T- JClassicδɛ. This logic gives the mean to specify nonmonotonic authorizations, and a better representation of the temporal aspects specific to a given delegation. This new representation augments the expressivity of the model and therefore it facilitates even more the representation and the management of the delegation characteristics