1,413 research outputs found
The Kardar-Parisi-Zhang exponents for the dimensions
The Kardar-Parisi-Zhang (KPZ) equation has been connected to a large number
of important stochastic processes in physics, chemistry and growth phenomena,
ranging from classical to quantum physics. The central quest in this field is
the search for ever more precise universal growth exponents. Notably, exact
growth exponents are only known for dimensions. In this work, we present
physical and geometric analytical methods that directly associate these
exponents to the fractal dimension of the rough interface. Based on this, we
determine the growth exponents for the dimensions, which are in agreement
with the results of thin films experiments and precise simulations. We also
make a first step towards a solution in dimensions, where our results
suggest the inexistence of an upper critical dimension
O Referencial de Educação para o Desenvolvimento (RED) como Elemento Promotor de Cidadania e Valores
O presente relatório de Prática de Ensino Supervisionada foi elaborado para obtenção do grau de mestre em Educação Pré-Escolar e Ensino do 1.º Ciclo do Ensino Básico, ministrado na Escola Superior de Educação, Comunicação e Desporto, do Instituto Politécnico da Guarda.
A Prática de Ensino Supervisionada I, em contexto da educação pré-escolar, foi realizada no Jardim de Infância das Panóias, pertencente ao Agrupamento de Escolas da Sé, com um grupo de crianças com idades entre os 3-5 anos. A Prática de Ensino Supervisionada II, em contexto do 1º Ciclo, foi concretizada na Escola Básica do Espírito Santo, pertencente ao agrupamento de Escolas Afonso de Albuquerque, com uma turma do 4.º ano, ou seja, alunos com idades entre os 9-10 anos. Neste documento encontram-se as duas experiências de práticas de ensino supervisionada desenvolvidas e a consequente reflexão crítica e fundamentada das mesmas.
Neste trabalho, é também apresentado um pequeno estudo empírico que pretende percecionar o modo com o Referencial da Educação para o Desenvolvimento (RED) contribui, enquanto documento orientador e de trabalho de temáticas como a Pobreza e Desigualdades, a Paz e a Cidadania Global, para a promoção e desenvolvimento da educação para a cidadania ativa e para os valores nas crianças.
Metodologicamente foi realizada uma investigação-ação, com recurso à observação direta e indireta, tendo o registo das observações sido feito em grelhas previamente pensadas e elaboradas pelo professor-estagiário. A par disso, solicitou-se a auto avaliação a cada aluno, sobre as atividades realizadas.
Os resultados obtidos revelam o quanto é fundamental que estas temáticas sejam trabalhadas em contexto de sala de aula, aumentando a consciencialização das crianças para as mesmas
Música : correlatos bio-psico-sociais
Trabalho Final do Curso de Mestrado Integrado em Medicina, Faculdade de Medicina, Universidade de Lisboa, 2015A Música (e a sua origem) partilha o espaço com o Homem, desempenhando importantes funções individuais (intra-pessoais) e colectivas (inter-pessoais). Confere prazer, influencia emoções, controla a ansiedade, evoca memórias, estimula o sistema nervoso simpático, transcende, transporta para outro lugar. Contudo, a música extravasa o plano individual, abarcando o colectivo, contribuindo para a partilha de experiências, para o construir de uma harmonia social. Por isso, para os evolucionistas, a Música também ajudou o Homem na sua caminhada evolutiva.
Desde o século XX tornou-se também produto comercial e vendível, fonte de rendimento.
Para além da influência intra-indivíduo e inter-indivíduo, existe a influência indivíduo-meio.
Vários trabalhos científicos demonstram como a Música consegue alterar a percepção
do tempo e do espaço.
Aborda-se a Música com propósitos terapêuticos, da Pré-História aos dias de hoje. Refere-se, em seguida, a sua utilização de forma científica: a Musicoterapia. São referidas várias técnicas à disposição dos musicoterapeutas para complementar a terapêutica de doenças psiquiátricas (depressão unipolar, esquizofrenia, demência) e orgânicas (alívio da dor).Music shares its path with Men, taking up important individual and colective functions. Music gives plaesure, influences emotions, contributes to ansiety control, stimulates the autonumous nervous system, transcends. However, it crosses the individual borders, reaching the collective, giving its contribute to the social harmony. That’s why evolucionists claim that Music had a role on Mankind Evolution.
Since 20th century it became, as well, a market product, a source of income.
Beyond individual influences (intra-individual and inter-individual influences), there is the individual-environment influence. Some scientific works show how Music can change the perception of time and space.
It is also addressed the therapeutic utility of Music since pre-historic times and, since 20th century, in a scientific way as ‘music therapy’. Various techniques at disposal of music therapists are also referenced. Techniques that, as a supplementary therapy, help in the treatment of psychiatric diseases (unipolar depression, schizophrenia, ansiety) and organic diseases (pain relief)
MatchMaking – A Tool to Match OWL Schemas
This paper describes a software tool that implements an instancebased schema matching technique for OWL dialects. The technique is based on a matching algorithm that depends on the definition of similarity functions that evaluate the semantic proximity of elements from two different schemas. The tool is engineered to accommodate different similarity functions and variations of the matching algorithm, thereby facilitating experimentation with alternative setups
Combinatorial therapies for spinal cord injury: strategies to induce regeneration
The authors want to acknowledge the financial support
from Prémios Santa Casa Neurociências ‐ Prize Melo
e Castro for Spinal Cord Injury Research (MC-04/17);
from Portuguese Foundation for Science and Technology
[Doctoral fellowship (SFRH/BD/103075/2014) to EDG;
Post‐ Doctoral fellowship (SFRH/BPD/97701/2013) to
NAS; IF Development Grant to AJS]. This work is funded
by national funds through FCT under the scope of grant
reference TUBITAK/0007/2014 and 3599-PPCDT Project:
PTDC/DTP-FTO/5109/2014. This article has been developed under the scope of the projects NORTE-01-0145-
FEDER-000013, supported by the Northern Portugal Regional Operational Programme (NORTE 2020), under the
Portugal 2020 Partnership Agreement, through the European Regional Development Fund (FEDER). This work has
been funded by FEDER funds, through the Competitiveness Factors Operational Programme (COMPETE), and by
National funds, through the Foundation for Science and
Technology (FCT), under the scope of the project POCI-01-
0145-FEDER-007038.info:eu-repo/semantics/publishedVersio
Direct observation of modal hybridization in nanofluidic fiber [Invited]
Hybrid-material optical fibers enhance the capabilities of fiber-optics technologies, extending current functionalities to several emerging application areas. Such platforms rely on the integration of novel materials into the fiber core or cladding, thereby supporting hybrid modes with new characteristics. Here we present experiments that reveal hybrid mode interactions within a doped-core silica fiber containing a central high-index nanofluidic channel. Compared with a standard liquid-filled capillary, calculations predict modes with unique properties emerging as a result of the doped core/cladding interface, possessing a high power fraction inside and outside the nanofluidic channel. Our experiments directly reveal the beating pattern in the fluorescent liquid resulting from the excitation of the first two linearly polarized hybrid modes in this system, being in excellent agreement with theoretical predictions. The efficient excitation and beat of such modes in such an off-resonance situation distinguishes our device from regular directional mode couplers and can benefit applications that demand strong coupling between fundamentaland higher-order- modes, e.g. intermodal third-harmonic generation, bidirectional coupling, and nanofluidic sensing
Reconfigurable Intelligent Surfaces: The New Frontier of Next G Security
RIS is one of the significant technological advancements that will mark
next-generation wireless. RIS technology also opens up the possibility of new
security threats, since the reflection of impinging signals can be used for
malicious purposes. This article introduces the basic concept for a
RIS-assisted attack that re-uses the legitimate signal towards a malicious
objective. Specific attacks are identified from this base scenario, and the
RIS-assisted signal cancellation attack is selected for evaluation as an attack
that inherently exploits RIS capabilities. The key takeaway from the evaluation
is that an effective attack requires accurate channel information, a RIS
deployed in a favorable location (from the point of view of the attacker), and
it disproportionately affects legitimate links that already suffer from reduced
path loss. These observations motivate specific security solutions and
recommendations for future work.Comment: This work has been submitted to the IEEE for possible publication.
Copyright may be transferred without notice, after which this version may no
longer be accessibl
Data Mining Technique for Preventional Analysis of Work Accidents
There are many oil companies operating in Macaé-RJ, Campos basin, they value the safety of work and the lives of its employees. These companies do a study to verify the health status of their employees' spine and result in a database with six attributes, such as: Pelvic incidence, Pelvic inclination, Lumbar lordosis angle, Sacral inclination, Pelvic radius and Degree of Spondylolisthesis. For in Brazil, recently, Social Security has released statistical studies that show back pain as leaders in the ranking of departures in the first half of 2016, a fact that directly affects the productivity of companies and health of their employees. This article aims to apply the KDD process, specifically the task of Data Mining classification, ie, classify if the employee will be fit or unfit for the job. The decision tree was the technique chosen through the algorithm J48 to verify the possibilities of treatment of the collaborators in the prevention and improvement in the working environment, and even, a change in the management was made from the results found. It resulted in inadequate staff postures, inadequate service stations, lack of training in equipment handling, lack of knowledge about cargo handling
On the performance of the intermediate Hamiltonian Fock-space coupled-cluster method on linear triatomic molecules: The electronic spectra of NpO2+, NpO22+, and Pu O22
International audienceIn this paper we explore the use of the novel relativistic intermediate Hamiltonian Fock-space coupled-cluster method in the calculation of the electronic spectrum for small actinyl ions (NpO2+, NpO22+, and PuO22+). It is established that the method, in combination with uncontracted double-zeta quality basis sets, yields excitation energies in good agreement with experimental values, and better than those obtained previously with other theoretical methods. We propose the reassignment of some of the peaks that were observed experimentally, and confirm other assignments
Petrografia e Geoquímica do Complexo Migmatítico de Bemposta (Zona Centro Ibérica, NE de Portugal)
ABSTRACT: The Bemposta Migmatite Complex (CMB) belong to the Central-Iberian Zone, NE Portugal. It is a high-grade metamorphic belt composed by metasediments of Ediacarian-Lower Cambrian age affected by partial melting during the second Variscan deformation event (D2). The anatexis culminated with intrusion of syn-tardi-D2 leucogranite sills in the CMB. Field and petrographic evidence suggest that the anatexis of the metasediments was controlled by muscovite dehydration-melting reactions. On the other hand, the stromatic leucosomes show that they were probably produced at a slightly deeper structural level (through biotite dehydration-melting reactions) and subsequently injected in these lithologies. The geochemical data reveals that leucosomes no longer correspond to the original melt compositions. During melt migration and ascent, they underwent fractional crystallization and accumulation of K-feldspar. Syn-tardi-D2 leucogranites that intrude CMB were most likely produced by higher degrees of partial melting. They have fractionated compositions and variable degrees of contamination with residual accessory mineral phases. Thus, CMB is interpreted as a Migmatite Injection Complex, where anatectic melts produced at slightly deeper levels were accumulated.RESUMO: O Complexo Migmatítico de Bemposta (CMB) situa-se na Zona Centro Ibérica (NE Portugal) correspondendo a um cinturão metamórfico de alto grau, composto por metassedimentos do Ediacariano-Câmbrico Inferior afetados por fusão parcial durante a segunda fase de deformação Varisca (D2). A anatexia destas rochas culminou com a intrusão de leucogranitos sin-tardi-D2 do tipo sill. As evidências de campo em consonância com a petrografia sugerem que a anatexia dos metassedimentos foi controlada pela reação de desidratação da moscovite. Os leucossomas mostram evidências de terem sido produzidos em níveis estruturais inferiores (através da reação da desidratação da biotite) e subsequentemente injetados nestas litologias. Os dados de geoquímica revelam que os leucossomas durante a sua ascensão foram afetados por cristalização fracionada e acumulação de feldspato potássico. Os leucogranitos sin-tardi-D2 que intruem o CMB resultaram de altas taxas de fusão e possuem composições equivalentes a magmas afetados por cristalização fracionada, contaminados por minerais acessórios residuais. Assim, o CMB é interpretado como um Complexo Migmatítico de Injeção, onde os líquidos anatéticos produzidos em profundidade se acumularam.info:eu-repo/semantics/publishedVersio
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