A lightweight distributed super peer election algorithm for unstructured dynamic P2P systems

Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Mestre em Engenharia Electrotécnica e de ComputadoresNowadays with the current growth of information exchange, and the increasing mobility of devices, it becomes essential to use technology to monitor this development. For that P2P networks are used, the exchange of information between agencies is facilitated, these now being applied in mobile networks, including MANETs, where they have special features such as the fact that they are semi-centralized, where it takes peers more ability to make a greater role in the network. But those peer with more capacity, which are used in the optimization of various parameters of these systems, such as optimization\to research, are difficult to identify due to the fact that the network does not have a fixed topology, be constantly changing, (we like to go online and offline, to change position, etc.) and not to allow the exchange of large messages. To this end, this thesis proposes a distributed election algorithm of us greater capacity among several possible goals, enhance research in the network. This includes distinguishing characteristics, such as election without global knowledge network, minimal exchange of messages, distributed decision made without dependence on us and the possibility of influencing the election outcome as the special needs of the network

IMPACT OF THE 2003 CAP REFORM AND THE HEALTH-CHECK IN ALQUEVA IRRIGATED PROJECT

One of the major challenges of the Alqueva Irrigation project is to benefit with irrigation, 110 000 ha. of dryland area. This project has a huge potential because it is located on a traditional agricultural area and has agro-weather conditions favourable to the development of irrigation crops. However, there is some challenges that needed to be overcome, namely the recent developments of the Common Agricultural Policy (CAP), the expected water price increase and the latest guidance in the water management policy. Considering this framework, the main goal of work is to assess the impact of the 2003 CAP Reform and the Health-Check in Alqueva irrigated project. Based on a survey sample of farms of the irrigation scheme of Monte Novo, three representative farms were selected using multivariate statistical methods. To assess the competitiveness of Monte Novo farms, a multi-period programming model was developed that allowed to analyse the inter-temporal nature of investments, optimal crop and livestock activities mix and structural farm changes. The farmer goal was assumed to be the maximization of the final farm net worth. The results showed that 2003 CAP reform and the implementation of Alqueva irrigation project lead to significant changes in the traditional agricultural model. However these changes are not determinant for long run farms competitiveness. The competitiveness is dependent on farmers’ adoption of new technologies and activities, such as vineyard, olives, industrial fruits and legumes

A COMPETITIVIDADE DO REGADIO DE ALQUEVA EM PORTUGAL: O CASO DO BLOCO DE REGA DO MONTE NOVO

O objectivo deste estudo é avaliar a competitividade do regadio de Alqueva no Sul de Portugal na região Alentejo. O estudo foi realizado com base em três grupos de explorações agrícolas representativas seleccionadas de uma amostra de explorações agrícolas do bloco de rega do Monte Novo. Para cada uma delas, foi desenvolvido um modelo de programação matemática multi-período adaptado às suas características específicas. Os principais resultados permitem concluir que a Política Agrícola Comum e a Directiva Quadro da Água condicionam a competitividade do regadio nesta região. No entanto, a adopção de novas tecnologias de produção permitirá contrariar esses efeitos negativos e assegurar a competitividade futura do regadio

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

Measurement of the W-boson mass in pp collisions at √s=7 TeV with the ATLAS detector

A measurement of the mass of the W boson is presented based on proton–proton collision data recorded in 2011 at a centre-of-mass energy of 7 TeV with the ATLAS detector at the LHC, and corresponding to 4.6 fb−1 of integrated luminosity. The selected data sample consists of 7.8×106 candidates in the W→μν channel and 5.9×106 candidates in the W→eν channel. The W-boson mass is obtained from template fits to the reconstructed distributions of the charged lepton transverse momentum and of the W boson transverse mass in the electron and muon decay channels, yielding mW=80370±7 (stat.)±11(exp. syst.) ±14(mod. syst.) MeV =80370±19MeV, where the first uncertainty is statistical, the second corresponds to the experimental systematic uncertainty, and the third to the physics-modelling systematic uncertainty. A measurement of the mass difference between the W+ and W−bosons yields mW+−mW−=−29±28 MeV