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Diabetes Mellitus and its Influence on the Success of Endodontic Treatment: A R...
Ferreira, Manuel Marques; Faculdade de Medicina Dentária. Universidade de Coimbra. Coimbra. Portugal.Introduction: Diabetes mellitus is an endocrine disease in which are involved the hormones produced by the islets of Langerhans. The diabetes mellitus can affect various functions of the immune system of the individual, predisposing them to chronic inflammation, progressive degradation of tissues and decreased tissue repair. The changes caused by this disease at the level of the oral cavity can highlight xerost...
The M
Ferreira, Manuel Alberto M.Given the busy period major importance in queuing systems, it is also relevant to study the busy cycle. In this work some interesting results on M; G; ∞ queue system busy cycle distribution are presented. They are emphasized for the M; D; ∞ queue system and a numerical method to compute the M; D; ∞ queue system busy cycle distribution function is presented.
The fisheries dissipative effect modelling through dynamical systems and chaos ...
Ferreira, Manuel Alberto M.; Filipe, José AntónioIt is presented a very simple mathematical model to study the dissipative effect in fisheries, based in dynamical systems and in its approach through chaos theory. Actually, due to constant misconducts, forgetting their consequences and only prosecuting easy profits, the risk of extinction is very real for fisheries resources. From it results the importance of this kind of models.
Convex Sets Strict Separation in Hilbert Spaces
Ferreira, Manuel Alberto M.; Filipe, José AntónioConvex sets separation is very important in convex programming, a very powerful mathematical tool for operations research, management and economics, for example. The target of this work is to present Theorem 3.1 that gives sufficient conditions for the strict separation of convex sets.
The Partnership as a Factor of Sustainable Growth for the Companies in the Info...
Albuquerque, Daniel Correia de; Filipe, José António; Ferreira, Manuel Alberto M.In the last decade, some companies in the field of information technology had been significant growth while others have not reached the same results. We also observed that some of these companies began to adopt strategies with a focus on partnership. There are a number of questions about the partnership as a factor of sustainable growth for the companies in the information technology Sector. This article presen...
Unemployment Modelled Through M
Ferreira, Manuel Alberto M.; Filipe, José António; Coelho, ManuelUsing results on the M; G; ∞ queue busy period, it is presented an application of this queue system in the unemployment periods parameters and distribution function study.
Networks of Networks: The Last Frontier of Complexity-A Book Review
Ferreira, Manuel Alberto M.Along this work the book "Networks of Networks: The Last Frontier of Complexity", 978-3-319-03517-8 published in Springer Series “Understanding Complex Systems” is reviewed. This book theme importance is evident and enormous since it deals with something essential to nowadays everybody’s life, the “Critical Infrastructures”. In the various chapters these devices are studied, exemplified and modelled in order to...
Convex Sets Strict Separation in the Minimax Theorem
Ferreira, Manuel Alberto M.; Matos, Maria Cristina PeixotoThe convex sets strict separation is very useful to obtain mathematical optimization results. The minimax theorem, a key result in Game Theory is an example. It will be outlined in this work.
M
Ferreira, Manuel Alberto M.Even after the Humanity efforts and great success in infectious diseases control, still epidemics happen, being the annual influenza outbreaks examples of those occurrences. To forecast the epidemic period length is very important because, in this period, it is necessary to strengthen the health care, demanding extra availability in human and material resources, with a huge increase of expenses. More pertinen...
The Weak Convergence in Hilbert Spaces Concept Construction
Ferreira, Manuel Alberto M.It is intended in this article to critically review the weak convergence concept in the real Hilbert (Note 1) spaces domain. It is studied mainly its construction process, since the main goal was to generalize the Bolzano (Note 2)-Weierstrass (Note 3) theorem. Then it is discussed in which conditions weak convergence implies convergence.
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