12 documents found, page 1 of 2
Cloud-based implementation of a SON radio resources planning system for mobile ...
Cortesão, R.; Fernandes, D.; Soares, G.; Clemente, D.; Sebastião, P.; Ferreira, L. S.In mobile network deployments of growing size, the optimum and fast planning of radio resources are a key task. Cloud services enable efficient and scalable implementation of procedures and algorithms. In this paper, a proof of concept implementation of a cloud-based network planning work pattern using Amazon Web Services (AWS) is presented, containing new and efficient radio resource planning algorithms for 3G...
Natural Quasi-Rendezvous and Evasive Maneuvers assisted by Atmospheric Drag
Jesus, A. D.C.; Ferreira, L. S.; Sousa, R. R. [UNESP]Made available in DSpace on 2020-12-12T01:08:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-11-04; The study of evasive maneuvers of spacecraft in the face of the danger of collision with space debris is essential and important today due to the growth of missions at low altitudes (LEO). Bodies that orbit this region are affected by the Earth's drag force. In this work, we present the results of numer...
Comparison of artificial intelligence and semi-empirical methodologies for esti...
Fernandes, D.; Raimundo, A.; Cercas, F.; Sebastião, P.; Dinis, R.; Ferreira, L. S.To help telecommunication operators in their network planning, namely coverage estimation and optimisation tasks, this article presents a comparison between a semi-empirical propagation model and a propagation model generated using Artificial Intelligence (AI). These two types of propagation models are quite different in their design. The semi-empiric Automatically Calibrated Standard Propagation Model (ACSPM) ...
Automatic coverage based neighbour estimation system: a cloud-based implementation
Pina, P. M.; Godinho, A. F.; Fernandes, D.; Clemente, D.; Sebastião, P.; Soares, G.; Ferreira, L. S.Over the years, mobile networks have grown exponentially due to rising demand. These networks mix different types of cells, which makes manual configuration difficult, costly and tedious. Furthermore, inefficiencies stemming from these problems can cause problems in Handover performance, since a mobile device may not always connect to the optimal cell upon switching from one to the other, potentially harming se...
A novel way to automatically plan cellular networks supported by linear program...
Godinho, A.; Fernandes, D.; Soares, G.; Pina, P.; Sebastião, P.; Correia, A.; Ferreira, L. S.With the increasing number of mobile subscribers worldwide, there is a need for fast and reliable algorithms for planning/optimization of mobile networks, especially because, in order to maintain a network’s quality of service, an operator might need to deploy more equipment. This paper presents a quick and reliable way to automatically plan a set of frequencies in a cellular network, using both cloud technolog...
Cloud-based implementation of an automatic coverage estimation methodology for ...
Fernandes, D.; Clemente, D.; Soares, G.; Sebastião, P.; Cercas, F.; Dinis, R.; Ferreira, L. S.One of the main concerns of telecommunications operators are related to the network coverage. A weak coverage can lead to a decrease, not only in the user experience when using the operators’ services such as multimedia streaming, but also decreases the overall Quality of Service. This paper presents a novel cloud-based framework of a semi-empirical propagation model that estimates the coverage in a precise way...
Use of the mini nutritional assessment tool in elderly people from long-term in...
Ferreira, L. S.; Nascimento, Luiz Fernando Costa; Marucci, M. F. N.Made available in DSpace on 2019-09-12T16:53:25Z (GMT). No. of bitstreams: 0 Previous issue date: 2008; Background: the Mini Nutritional Assessment (MNA) is a multidimensional method of nutritional evaluation that allows the diagnosis of malnutrition and risk of malnutrition in elderly people, it is important to mention that this method has not been well studied in Brazil. Objective: to verify the use of the MN...
Colisional Cloud Debris and Propelled Evasive Maneuvers
Ferreira, L. S.; Jesus, A. D.C.; Carvalho, T. C.F.; Sousa, R. R. [UNESP]Made available in DSpace on 2018-12-11T16:50:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-10-25; Space debris clouds exist at various altitudes in the environment outside the Earth. Fragmentation of debris and/or collision between the debris of a cloud increases the amount of debris, producing smaller debris. This event also increases significantly the chances of collision with operational vehicles...
Rendezvous and Quasi-Rendezvous Maneuvers with Space Debris
Carvalho, T. C.F.; Jesus, A. D.C.; Ferreira, L. S.; Sousa, R. R. [UNESP]Made available in DSpace on 2018-12-11T16:50:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-10-25; Rendezvous maneuvers are very useful in space missions operations. The encounters between spacecraft, between a spacecraft and a space debris, between a probe and a celestial body, between a spacecraft and a nearby object (NEO) as a mitigation measure to protect the Earth against collision and other app...
Síndrome do cão tremedor em um Pinscher
Sousa, M. G.; Higa, A.; Gerardi, D. G.; Ferreira, L. S.; Teshima, E.; Carareto, R.; Tinucci-Costa, M.; Carvalho, T.O artigo não apresenta resumo.