INTERFACES DA EDUCAÇÃO DE JOVENS E ADULTOS E EDUCAÇÃO ESPECIAL: O DIREITO EM ANÁLISE

O estudo tem como objetivo analisar como se configuram as interfaces da Educação de Jovens e Adultos (EJA) e da Educação Especial (EE) nas escolas da rede estadual de ensino do município de Colatina-ES no que se refere à efetivação do direito à educação. Tomamos como referências básicas para a discussão os preceitos constitucionais da educação como direito social, as formulações teóricas no campo das políticas educacionais para as modalidades da educação de jovens e adultos e educação especial partindo da concepção de educação como um direito humano fundamental e como aprendizagem ao longo da vida. Trata-se de uma pesquisa qualitativa, tendo como estratégia o estudo de caso realizado por meio de análise documental, observação participante, diário de campo, aplicação de questionários e de levantamento de dados no Instituto Brasileiro de Geografia e Estatística. Considerando os dados do total da população do município com deficiência, o número de matrículas de estudantes público-alvo da EE na EJA é ínfimo, observa-se que os educandos não estão matriculados nas escolas estaduais de educação básica, mas no Centro de Educação Estadual de Jovens e Adultos (CEEJA). De forma surpreendente, o processo da pesquisa revela que as interfaces da EJA e EE vêm sendo produzidas pelo protagonismo dos sujeitos e não pela política implementada, sendo assim, os sujeitos com suas diferentes vivências e saberes são os responsáveis por inverter a lógica da oferta da EJA no CEEJA. Ainda na análise da documentação da Secretaria Estadual de Educação do ES constatamos que existem lacunas na definição das políticas públicas educacionais para os sujeitos, o que nos leva à constatação de que o reconhecimento das modalidades da EJA e da EE como um direito ainda não se materializou como efetivação real no contexto político educacional brasileiro

On-site magnetization in open antiferromagnetic chains: a classical analysis versus NMR experiments in a spin-1 compound

The response of an open spin chain with isotropic antiferromagnetic interactions to a uniform magnetic field is studied by classical Monte Carlo simulations. It is observed how the induced on-site magnetization is non uniform, due to the occurrence of edge staggered terms which decay exponentially over a distance equal to the zero field correlation length of the infinite chain. The total magnetic moment associated to each staggered term is found to be about half of the original single-spin magnitude and to decrease as the inverse of temperature (i.e. to behave as a Curie-like moment). The numerical results are compared to recent NMR findings in spinless-doped Y(2)BaNiO(5); the remarkable agreement found shows that, for temperatures above the Haldane gap, the classical approach gives a correct picture of the boundary effects observed in the Heisenberg S=1 chain.Comment: 4 pages, 4 eps figures; minor changes in the text; added reference

Topological Crystalline Insulator In A New Bi Semiconducting Phase

Topological crystalline insulators are a type of topological insulators whose topological surface states are protected by a crystal symmetry, thus the surface gap can be tuned by applying strain or an electric field. In this paper we predict by means of ab initio calculations a new phase of Bi which is a topological crystalline insulator characterized by a mirror Chern number nM =−2, but not a Z2 strong topological insulator. This system presents an exceptional property: at the (001) surface its Dirac cones are pinned at the surface high-symmetry points. As a consequence they are also protected by time-reversal symmetry and can survive against weak disorder even if in-plane mirror symmetry is broken at the surface. Taking advantage of this dual protection, we present a strategy to tune the band-gap based on a topological phase transition unique to this system. Since the spin-texture of these topological surface states reduces the back-scattering in carrier transport, this effective band-engineering is expected to be suitable for electronic and optoelectronic devices with reduced dissipatio

Sodium–Gold Binaries: Novel Structures For Ionic Compounds From An Ab Initio Structural Search

Intermetallic compounds made of alkali metals and gold have intriguing electronic and structural properties that have not been extensively explored. We perform a systematic study of the phase diagram of one binary system belonging to this family, namely NaxAu1−x, using the ab initio minima hopping structural prediction method. We discover that the most stable composition is NaAu2, in agreement with available experimental data. We also confirm the crystal structures of NaAu2 and Na2Au, that were fully characterized in experiments, and identify a candidate ground-state structure for the experimental stoichiometry NaAu. Moreover, we obtain three other stoichiometries, namely Na3Au2, Na3Au and Na5Au, that could be thermodynamically stable. We do not find any evidence for the existence of the experimentally proposed composition NaAu5. Finally, we perform phonon calculations to check the dynamical stability of all reported phases and we simulate x-ray diffraction spectra for comparison with future experimental data

Electromechanical coupling of the Kv1.1 voltage-gated K+ channel is fine-tuned by the simplest amino acid residue in the S4-S5 linker

Investigating the Shaker-related K+ channel Kv1.1, the dysfunction of which is responsible for episodic ataxia 1 (EA1), at the functional and molecular level provides valuable understandings on normal channel dynamics, structural correlates underlying voltage-gating, and disease-causing mechanisms. Most studies focused on apparently functional amino acid residues composing voltage-gated K+ channels, neglecting the simplest ones. Glycine at position 311 of Kv1.1 is highly conserved both evolutionarily and within the Kv channel superfamily, is located in a region functionally relevant (the S4-S5 linker), and results in overt disease when mutated (p.G311D). By mutating the G311 residue to aspartate, we show here that the channel voltage-gating, activation, deactivation, inactivation, and window currents are markedly affected. In silico, modeling shows this glycine residue is strategically placed at one end of the linker helix which must be free to both bend and move past other portions of the protein during the channel’s opening and closing. This is befitting of a glycine residue as its small neutral side chain allows for movement unhindered by interaction with any other amino acid. Results presented reveal the crucial importance of a distinct glycine residue, within the S4-S5 linker, in the voltage-dependent electromechanical coupling that control channel gating