Melnikov analysis in nonsmooth differential systems with nonlinear switching manifold

We study the family of piecewise linear differential systems in the plane with two pieces separated by a cubic curve. Our main result is that 7 is a lower bound for the Hilbert number of this family. In order to get our main result, we develop the Melnikov functions for a class of nonsmooth differential systems, which generalizes, up to order 2, some previous results in the literature. Whereas the first order Melnikov function for the nonsmooth case remains the same as for the smooth one (i.e. the first order averaged function) the second order Melnikov function for the nonsmooth case is different from the smooth one (i.e. the second order averaged function). We show that, in this case, a new term depending on the jump of discontinuity and on the geometry of the switching manifold is added to the second order averaged function

A Turquia de Erdogan: o início do fim ou somente o fim do início?

2014 was a year of paradoxes in Turkey. Internally, Recep Tayyip Erdogan's power was reinforced by winning the two elections, local and presidential, with comfortable margins in spite of the antigovernmentprotests and the corruption scandals involving the government. This was a scenario feared by many who see Erdogan an increasingly authoritarian leader. Externally, Ankara had to face the escalation of the conflicts in Syria and Iraq, and the rise of the Islamic State, in a period in which Turkey seems to lack a coherent foreign policy strategy

Oxygen Transfer In The Solid-state Cultivation Of D. Monoceras On Polyurethane Foam As Na Inert Support

In recent years, there has been a resurgence of interest concerning solid-state cultivation processes due to a number of advantages over submerged cultivation. However, studies on oxygen transfer and the performance of bioreactors are lacking. Processes that use inert supports loaded with chemically-defined liquid media have several potential applications and offer numerous advantages, such as improved process control and monitoring and enhanced process consistency compared with cultivation on natural solid substrates. The aim of this research was to study the oxygen transfer for the production of allergenic proteins from a biomass of Drechslera (Helminthosporium) monoceras cultured in a packed-bed reactor filled with polyurethane foam. The results show that a high protein concentration can be produced on an inert support with a high overall oxygen transfer coefficient (K(L)a) during cultivation.33479379911th Latin American Symposium on Anaerobic Digestion (DAAL)2014Havana, CUB

Indicativo agroclimático para a pupunheira no Estado do Pará.

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Cancer diagnosis disclosure from Portuguese physicians

OBJECTIVE: Doctor-patient communication in oncology, particularly concerning diagnostic disclosure, is a crucial factor related to the quality of the doctor-patient relationship and the psychological state of the patient. The aims of our study were to investigate physicians' opinions and practice with respect to disclosure of a cancer diagnosis and to explore potential related factors. METHOD: A self-report questionnaire developed for our study was responded to by 120 physicians from Coimbra University Hospital Centre and its primary healthcare units. RESULTS: Some 91.7% of physician respondents generally disclosed a diagnosis, and 94.2% were of the opinion that the patient knowing the truth about a diagnosis had a positive effect on the doctor-patient relationship. A need for training about communicating with oncology patients was reported by 85.8% of participants. The main factors determining what information to provide to patients were: (1) patient intellectual and cultural level, (2) patient desire to know the truth, and (3) the existence of family. SIGNIFICANCE OF RESULTS: Our results point to a paradigm shift in communication with cancer patients where disclosure of the diagnosis should be made part of general clinical practice. Nevertheless, physicians still experience difficulties in revealing cancer diagnoses to patients and often lack the skills to deal with a patient's emotional responses, which suggests that more attention needs to be focused on communication skills training programs

Boletim agrometeorológico de 2008 para Tomé-Açu, PA.

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Possibilidade agroclimática da cultura da mandioca para municípios com pequeno e grande déficit hídrico no Estado do Pará.

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Boletim agrometeorológico de 2008 para Belém, PA.

bitstream/item/27785/1/Doc362.pd

Zoneamento agroclimático para a cultura da pupunheira para a produção de palmito no Estado do Pará.

bitstream/item/28309/1/Doc318.pdfDisponível também on-line