1,047 research outputs found
Caracterização de biótopos do intertidal rochoso e a sua aplicabilidade pedagógica
Dissertação de Mestrado em Cidadania Ambiental e Participação apresentada à Universidade AbertaA relação com o mar e com os ecossistemas marinhos é algo intrínseco a qualquer
açoriano, e que advém desde cedo, pelo constante contacto com o oceano e a sua
biodiversidade marinha, tornado assim as ilhas num laboratório vivo pronto a ser
descoberto e estudado.
Os estudos, porém recentes da zonação do intertidal, nomeadamente dos seus biótopos no
arquipélago dos Açores, realçam a distância biológica destas ilhas e dos seus habitats em
relação ao continente português. No entanto, esta especificidade biológica não é destacada
no ensino básico, verificando-se assim a lacuna de associação do Currículo Regional do
Ensino básico com os seus pilares – Açorianidade e Insularidade.
A educação ambiental assume um papel principal na formação dos estudantes não só na
conversação do ambiente, mas consciencializando-os para os impactes da ação
antropogénica nos ecossistemas costeiros.
Pela aplicabilidade do caderno de campo, desenvolvido tendo em conta os conteúdos
pedagógicos do 8º ano do 3º ciclo do ensino básico e realidade da fauna /flora marinha e
da riqueza geológica e paleontológica, verificou-se um aumento, em 95 %, na aquisição de
conhecimentos por parte dos alunos que realizaram a saída de campo. Conclui-se assim
que, recursos pedagógicos com especificidade local, associado a saída de campo da
disciplina de Ciências Naturais são uma vantagem para o ensino e para o interesse dos
alunos deste nível de escolaridade, no arquipélago dos Açores.The relationship with the sea and the marine ecosystems is something intrinsic to any
Azorean citizen, and it becomes from an early age, by constant contact with the ocean an
its marine biodiversity, thereby making the islands a living laboratory ready to be
discovered and studied.
Recent studies on the intertidal zonation, and particular in biotopes in the Azores
archipelago, highlight the biological distant between these islands and their habitats in
relation to the Portuguese mainland coast. However, this biological specific is not
highlighted in elementary education; therefore this is a gap on the Regional Curriculum of
Elementary Education, and with its pillars – Azoreanity and Insularity.
Environmental Education plays a major role in the training in student’s education not only
in environmental conservation, but it raises awareness to the impacts of anthropogenic
action on coastal ecosystems.
Through the sampling made in Praia Formosa, the Biotope set to Santa Maria’s
mediolittoral it’s different, with high abundance of Halopteris scoparia.
The applicability of the field book, that was prepared taking into account the pedagogical
content of the 8th grade and the present marine fauna and flora, and also the geological and
paleontological history, has measured an increase, in 95%, the knowledge acquisition by the
students who participate on the field trip. In conclusion, learning resources with local
specify associated to field trip in Natural Science discipline are an advantage to teaching
and for student’s interests in this level of education., in the Azores
Spontaneous vectorization of electrically charged black holes
In this work, we generalise the spontaneous scalarization phenomena in Einstein-Maxwell-Scalar
models to a higher spin field. The result is an Einstein-Maxwell-Vector model wherein a vector field
is non-minimally coupled to the Maxwell invariant by an exponential coupling function. We show that
the latter guarantees the circumvention of an associated no-hair theorem when the vector field has the
form of an electric field. Different than its scalar counterpart, the new spontaneously vectorized ReissnerNordstr¨om (RN) black holes are, always, undercharged while being entropically preferable. The solution
profile and domain of existence are presented and analysed.publishe
Cartographic Generalization Applied to Social Networks Maps in the City of Curitiba in Brazil
Scalaroca stars: coupled scalar-Proca solitons
We construct and explore the physical properties of \textit{scalaroca stars}:
spherically symmetric solitonic solutions made of a complex scalar field
and a complex Proca field . We restrict our attention to configurations
in which both fields are in the fundamental state and possess an equal mass,
focusing on the cases when () the scalar and Proca fields are
(non--linearly) super--imposed and do not interact with each other; and ()
the scalar and Proca fields interact through the term . The solutions are found numerically for the non--interacting case
() as well as for both signs of the interaction coupling constant
. While pure ( single--field) Proca/scalar boson stars are the
most/least massive for weakly--interacting fields, one can obtain more massive
solutions for a sufficiently strong interaction. Besides, in the latter case,
solutions can be either in a synchronized state -- in which both fields have
the same frequency -- or in a non--synchronized state. In addition, we observe
that the coupling between the two fields allows solitonic solutions with a real
scalar field. We further comment on the possibility of spontaneous
scalarization and vectorization of the interacting solitonic solution.Comment: 21 pages, 13 figures, this project was started before the recently
published work ArXiv:2304.0801
On the construction of explosive relation algebras
Fork algebras are an extension of relation algebras obtained by extending the
set of logical symbols with a binary operator called fork. This class of
algebras was introduced by Haeberer and Veloso in the early 90's aiming at
enriching relation algebra, an already successful language for program
specification, with the capability of expressing some form of parallel
computation.
The further study of this class of algebras led to many meaningful results
linked to interesting properties of relation algebras such as representability
and finite axiomatizability, among others. Also in the 90's, Veloso introduced
a subclass of relation algebras that are expansible to fork algebras, admitting
a large number of non-isomorphic expansions, referred to as explosive relation
algebras.
In this work we discuss some general techniques for constructing algebras of
this type
Report of the Second International Symposium on Molecular Epidemiology in Childhood Leukaemia and Embryonal Tumours, Rio de Janeiro, Brazil
The recent International Symposium on Molecular epidemiology in Embryonal Tumours and Paediatric Leukaemia was held on 4–6 March 2008 in Rio de Janeiro, Brazil. It proved a very productive meeting in which studies relating to genetics, therapeutical trials, identification of risk factors in acute leukaemia neuroblastoma and Wilms’ tumours were presented. Over 120 participants gathered for three days of fruitful discussions, including representatives of paediatrics, haematology, laboratory, epidemiology and pathology. Debates were held about strategies of applications of important biomarkers for clinical trials. Highlights of each of the scientific presentations are summarized below
Nuestra experiencia con la enfermedad de Freiberg
Analizamos una serie de 34 pacientes, 9 varones y 25 mujeres, con enfermedad de Freiberg, detallando su localización y grado evolutivo en el momento del diagnóstico. Clínicamente la severidad del cuadro fue muy variable, y con frecuencia discordante con la imagen radiológica. Tan solo en 5 pacientes fue necesario el tratamiento quirúrgico. No se pudo detectar un factor etiológico claro y único, existiendo casos con y sin antecedentes traumáticos. Se describe la evolución radiológica de esta enfermedad. La RMN permite de forma precoz, detectar las anomalías óseas en las fases más iniciales.We analyze a series of 34 patients, 9 males and 25 females, with Freiberg's disease, detailing their location and severity at moment of the diagnosis. Clinically the severity of disease was variable, and frequently discordant with the radiological image. Only in 5 patients was necessary the surgical treatment. There was no etiologic factor clearly found in any of the cases, with and without traumatic precedents. We describe the radiological pattern of this disease. The MRI permits at early stage detection of bone anomalies
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