Agency: European Commission | Branch: FP7 | Program: CSA-CA | Phase: SST-2007-4.1-04;SST-2007-4.1-01 | Award Amount: 722.88K | Year: 2008
ESTEEM aims at contributing to the coordination of research activities and policies between the EU and the Neighbouring Countries on transport issues. More specifically, its aim is to strengthen and enhance the links between Maghreb and the neighbouring EU countries namely Italy, France and Spain - in order to identify strategic priorities and topics for high quality researches on safety and security in transport system and infrastructure. The project has been outlined by a consortium consisting of seven organizations with different but complementary field of expertise related to transportation. Each partner represents a country of the selected area of intervention, which means a well-balanced geographical distribution and a consequent higher number and range of potential beneficiaries to be reached. The proposal is structured according to the following method: the state of the art on safety and security related research in the selected region will be analyzed; specific sub-areas will be identified according to the main needs in the domain of transport system safety and security; surveys will be conducted on each sub-area in order to identify priority research actions to be undertaken; a series of workshops will be organized in order to validate the surveys results, with the aim of identifying specific topics and defining potential guidelines and roadmaps for future research; an ad hoc network will be set up with the aim of fostering collaboration among the participant and disseminating the projects results to an as wide as possible range of stakeholders. Relevant stakeholders and other interested entities will be invited to join the network, hence improving collaborations at all levels. Co-ordination of research activities and policies on transport related topics will be in this way ensured across the whole Mediterranean area as well as a long lasting impact and sustainability.
Adjroud O.,University of Batna
Environmental Toxicology | Year: 2013
The exposure to nickel chloride (NiCl2) can cause hematotoxicity and hepatotoxicity and canaffect development. The present study pertains to the protective effect of selenium (Se) against NiCl2-induced toxicity in preimplanted Wistar albino rats. The subcutaneous (s.c.) administration of 25 or 50 mg/kg of NiCl2 to Wistar albino rats on day 3 of gestation induced an immediate and significant decrease in maternal body weight and anemia 2 days after treatment. In addition, an increase in plasma aspartate aminotransferase (AST) was observed. These effects were maintained on day 20 of gestation. Moreover, a significant increase in plasma alanine aminotransferase (ALT) levels was observed with the administration of 25 mg/kg of NiCl2. Conversely, administration of 50 mg/kg of NiCl2 by s.c. injection increased erythropoiesis at day 20 of gestation and decreased platelets counts. In addition, administration of 100 mg/kg of NiCl2 markedly reduced the maternal body weight and number of live fetuses and increased fetal loss, predominantly at the end of the experimental period. All dose levels of NiCl2 caused an alteration in the hepatic histoarchitecture. When 0.3-mg/kg Se was injected s.c. with 100-mg/kg NiCl2, the levels of plasma AST and ALT and the structure of the liver were restored. Administration of 20 mg/L/day of NiCl2 in the drinking water significantly reduced the maternal body weight at day five of gestation as well as erythropoiesis during the exposure period. The present study suggests that Se can counteract the nocuous effect of nickel on the liver; however this antioxidant did not prevent alterations in development and erythropoiesis. © 2011 Wiley Periodicals, Inc.
Zerguine S.,University of Batna |
Van Isacker P.,French Atomic Energy Commission
Physical Review C - Nuclear Physics | Year: 2011
A study is carried out on the role of the aligned neutron-proton pair with angular momentum J=9 and isospin T=0 in the low-energy spectroscopy of the N=Z nuclei Cd96, Ag94, and Pd92. Shell-model wave functions resulting from realistic interactions are analyzed in terms of a variety of two-nucleon pairs corresponding to different choices of their coupled angular momentum J and isospin T. The analysis is performed exactly for four holes (Cd96) and carried further for six and eight holes (Ag94 and Pd92) by means of a mapping to an appropriate version of the interacting boson model. The study allows the identification of the strengths and deficiencies of the aligned-pair approximation. © 2011 American Physical Society.
Bouzgou H.,University of Batna |
Benoudjit N.,University of Batna
Applied Energy | Year: 2011
A new approach based on multiple architecture system (MAS) for the prediction of wind speed is proposed. The motivation behind the proposed approach is to combine the complementary predictive powers of multiple models in order to improve the performance of the prediction process. The proposed MAS can be implemented by associating the predictions obtained from the different regression algorithms (MLR, MLP, RBF and SVM) making up the ensemble by three fusion strategies (simple, weighted and non-linear). The efficiency of the proposed approach has been assessed on a real data set recorded from seven locations in Algeria during a period of 10. years. The experimental results point out that the proposed MAS approach is capable of improving the precision of the wind speed prediction compared to the traditional prediction methods. © 2011 Elsevier Ltd.
Aouachria M.,University of Batna
Chinese Journal of Physics | Year: 2011
We study the movement of a two-level atom in interaction with an electromagnetic wave of circular polarization using the path integral formalism. The propagator is first written in the standard form by replacing the spin by a unit vector aligned along the polar-azimuthal direction. Then we use the phase-space and rotations in the space of spin coherent states to simplify the calculations. Thus the exact wave functions of the system are deduced. © 2011 The Physical Society of the Republic of China.
Aouachria M.,University of Batna
Canadian Journal of Physics | Year: 2011
The movement of a two-level atom interacting with an electromagnetic wave while subject to gravity is studied using path-integral formalism. The propagator is first written in a standard form, ∫D(path)exp(i)S(path), by replacing the spin with a unit vector aligned along the polar and azimuthal directions to determine the propagator exactly. Thus, the exact wave functions of the system are deduced. © 2011 Published by NRC Research Press.
Aouachria M.,University of Batna
Journal of the Korean Physical Society | Year: 2011
Exact solutions for a neutral spinning particle interacting with a helical magnetic field have been found by using a path integral formalism. The propagator is first written in the standard form ∫ D(path) exp i/h S(path) by replacing the spin by unit vectors aligned along the polar and azimuthal directions (θ, Ψ). Then, we use the phase space and rotations in the space of spin coherent states to simplify the calculations. Thus, the exact energy spectra with corresponding wave functions are deduced.
Aouachria M.,University of Batna
International Journal of Theoretical Physics | Year: 2015
We use the coherent-state path integral and an angular model for the spin to solve the pseudo-hermitian interaction between an oscillator and a spin-1/2 particle in an external magnetic field. The propagators are given explicitly as a perturbation series and are summed up exactly. The energy spectrum and the bi-orthonormal basis of states are deduced. © 2015, Springer Science+Business Media New York.
Bouderba H.,University of Batna
Journal of Alloys and Compounds | Year: 2013
A new high pressure structure of the CaSi2 compound is predicted from first-principles calculations. It corresponds to the KHg2-type which is a slightly distorted derivative of the AlB2-type. Several indications suggest that it is likely the true structure of the superconducting high pressure polymorph of the CaSi2 compound commonly reported as AlB2-like polymorph. © 2012 Elsevier B.V. All rights reserved.
News Article | October 12, 2016
Chaos and confusion could be used to encrypt colour photos and protect them from prying eyes, according to computer scientists in Algeria. Writing in the International Journal of Information and Computer Security, the team describe a new algorithm that generates pseudo-random sequences that change a plain image into a ciphered image in a single step leading to a file that cannot be cracked. Assia Beloucif, Oussama Noui and Lemnouar Noui of the University of Batna, explain how increasing concerns about personal data and privacy, particularly in medicine and other sensitive areas mean there is a growing need for easy to implement but tough to crack encryption technology that can protect images, such as medical scans, business plans, even just family snapshots. There are already powerful encryption tools for converting text documents but these are not the best choice for colour photos because there is a strong correlation between the data in the original image and an encrypted one, particularly in terms of bulk data volume. As such, the team explains encryption techniques that exploit confusion or diffusion can remove redundancies to reduce file sizes and spread pixel values so that it becomes more difficult to extract parts of the original image using data recovery and cracking tools. In addition, there is the potential of using chaos theory to further blur the correlation between original and encrypted image. Their algorithm uses a chain of "tweaks" that are spread randomly from pixel to pixel in the conversion by the encryption key. This approach, the team reports, beats other image encryption approaches in tests despite only requiring this single process to convert the original into an encrypted image. Explore further: The future of encryption More information: Design of a tweakable image encryption algorithm using chaos based schema. DOI: 10.1504/IJICS.2016.079183