Search results for "cens"
showing 10 items of 803 documents
Dynamic Spectrum Reservation for CR Networks in the Presence of Channel Failures: Channel Allocation and Reliability Analysis
2018
[EN] Providing channel access opportunities for new service requests and guaranteeing continuous connections for ongoing flows until service completion are two challenges for service provisioning in wireless networks. Channel failures, which are typically caused by hardware and software failures or/and by intrinsic instability in radio transmissions, can easily result in network performance degradation. In cognitive radio networks (CRNs), secondary transmissions are inherently vulnerable to connection breaks due to licensed users' arrivals as well as channel failures. To explore the advantages of channel reservation on performance improvement in error-prone channels, we propose and analyze …
ACCURATE DENSE STEREO MATCHING FOR ROAD SCENES
2017
International audience; Stereo matching task is the core of applications linked to the intelligent vehicles. In this paper, we present a new variant function of the Census Transform (CT) which is more robust against radiometric changes in real road scenes. We demonstrate that the proposed cost function outperforms the conventional cost functions using the KITTI benchmark. The cost aggregation method is also updated for taking into account the edge information. This enables to improve significantly the aggregated costs especially within homogenous regions. The Winner-Takes-All (WTA) strategy is used to compute disparity values. To further eliminate the remainder matching ambiguities , a post…
Urban poverty: Measurement theory and evidence from American cities
2021
AbstractWe characterize axiomatically a new index of urban poverty that i) captures aspects of the incidence and distribution of poverty across neighborhoods of a city, ii) is related to the Gini index and iii) is consistent with empirical evidence that living in a high poverty neighborhood is detrimental for many dimensions of residents’ well-being. Widely adopted measures of urban poverty, such as the concentrated poverty index, may violate some of the desirable properties we outline. Furthermore, we show that changes of urban poverty within the same city are additively decomposable into the contribution of demographic, convergence, re-ranking and spatial effects. We collect new evidence …
Research and Science Today Supplement 2/2014
2015
In this supplement of Research and Science Today journal are included scientific articles which debate problems from social science fields, engineering sciences fields, legal sciences and medical sciences fields: European borders, social challanges, immigration flows, migration in Europa, syrian refugees in Romania, modernity, cultural identity, Ukraina and Crimeea, financial crisis, constructivist Europe, economic security, democratic regimes, unilateral separation, lobbying for migration policy, naturalism, migrant wave.Research and Science Today Journal is a publication founded in 2011 and it is dedicated to the students of all levels (license, master and doctoral) of faculties in the co…
Research and Science Today Supplement
2013
In this issue are included scientific articles who debate problems from social science fields: development, power of the state, European policy, democracy, freedom of choice, social science. Authors talk about subjects as Sport policy and heroes in the Romanian communism, Food in war time in Transylvania, Global Security, Cyberspace, Postcommunism, Evaluation of some toxic compounds in water, Public policies. Research and Science Today Journal is a publication founded in 2011 and it is dedicated to the students of all levels (license, master and doctoral) of faculties in the country and abroad. We want to offer the participants the opportunity to present their scientific works in the follow…
En torno a la aculturación de los moriscos valencianos de Xivert en la época de Felipe II
2000
El objetivo de este artículo es tratar de mostrar cómo el discurso moriscófobo de una comunidad local respondía a problemas relacionados con la competencia por los recursos naturales y un planteamiento financiero. Desde abril de 1596 la villa cristiano vieja de Alcalá intentó oponerse a sus vecinos cristianonuevos de Xivert en la corte suprema del reino de Valencia. Alcalá argumentó que la licencia otorgada por el virrey a favor del acercamiento de los moriscos de Xivert a la costa, para que éstos pudieran acceder a sus tierras de labor, era una medida peligrosa para la seguridad de los cristianos viejos dado que favorecía la connivencia pirático-morisca. A pesar de una débil retórica que t…
Italian marine reserve effectiveness: does enforcement matter?
2008
Marine protected areas (MPAs) have become popular tools worldwide for ecosystem conservation and fishery management. Fish assemblages can benefit from protection provided by MPAs, especially those that include fully no-take reserves. Fish response to protection can thus be used to evaluate the effectiveness of marine reserves. Most target fish are high-level predators and their overfishing may affect entire communities through trophic cascades. In the Mediterranean rocky sublittoral, marine reserves may allow fish predators of sea urchins to recover and thus whole communities to be restored from coralline barrens to macroalgae. Such direct and indirect reserve effects, however, are likely t…
Urban property and revenues between the 10th and 11th century: the case of Chartres
2011
The author continues a discussion already published in "Mediterranea - ricerche storiche" (no. 18, 2010, p. 13- 32), examining a number 10th - 11th century concessions ad firmam in Chartres; in this period the territory was caught between the pressures of the Normans and the influence of the Capetians. The use of these contracts in such a well-defined geographic and socio-economic area enables us to resume examination of a subject which was first seriously investigated in the late nineteenth century by Guillaume Des Marez in relation to the city of Ghent, and then formulates observations about the relationship between urban development, the institutional profile of property, forms of domina…
La guerra ideológica
1982
Manifiesto firmado por sesenta intelectuales norteamericanos en apoyo a la guerra de Afganistán y las otras guerras "contra los países del Eje del Mal" anunciadas por Bush tras el 11-S.
«Lex Google»: Copyright Law and Internet Providers, Future Enemies or Allies?
2013
The German Federal Parliament is discussing the approval of the so-called “Lex Google” which will amend the German Copyright Act and provide for a number of improvements to the management of copyrighted content by Internet Service Providers. This paper focuses on the advantages and disadvantages linked to the diffusion of copyrighted content over the Internet and suggests that the Lex Google would benefit from taking better into account E-Commerce rules and ECJ case-law on Internet Service Providers.