Cartas ao congresso nacional: expressões escritas da cidadania no processo constituinte de 1988

A pesquisa de doutorado que apresento teve como objeto de estudo cartas escritas por diferentes sujeitos, enviando ideias para a Constituição brasileira promulgada em outubro de 1988. As cartas selecionadas são todas documentos manuscritos por diferentes sujeitos, componentes de um largo acervo documental, que apresenta indícios de que seus autores não concluíram o ensino fundamental, do tempo e do espaço em que foram escritas, hoje parte do fundo patrimonial do Museu da República. Esta pesquisa inseriu-se na temática sobre pluralidade de conhecimentos/saberes que circulam socialmente, especialmente os traduzidos por expressões escritas de sujeitos jovens e adultos. Entendi essa produção como um processo de participação política, ou seja, minha hipótese central pode ser assim resumida: sujeitos, em seus processos de produção de cidadania, ao escreverem cartas à elaboração da Constituição, em exercício de participação política, se autoproduzem como cidadãos, pela escrita. Mais do que exercício de cidadania, a abordagem e interpretação que fiz das escritas epistolares mostraram também que os sujeitos tinham conhecimentos que talvez ignorassem, e que independiam de conhecimentos formais para expressaram outros sentidos de cidadania, afirmando direitos tantas vezes negados. Esse reconhecimento levou-me à certeza de que estava diante de práticas sociais em que a noção de justiça cognitiva podia ser identificada, pelo fato de as pessoas, fora do espaço do conhecimento formal, revelarem outros conhecimentos indispensáveis ao exercício da cidadania, demonstrando a condição de iguais a pessoas escolarizadas em espaços formais. Assim sendo, devo admitir que o conhecimento formal não é condição para o exercício da cidadania, e que a presença de outros conhecimentos para além dos formais da cultura escrita, constituídos em redes, porque forjados na vida, no cotidiano em que os sujeitos vivem, e enredados em suas mais diferentes histórias que os constituem, e assim representados no modo como escreviam, permitiu reconhecer politicamente esses sujeitos de direito, fora do espaço da chamada educação formal. Esse reconhecimento levou-me à certeza (sempre provisória) de uma prática social em que a justiça cognitiva podia ser identificada, pelo fato de as pessoas, fora do espaço do conhecimento formal, revelarem outros conhecimentos indispensáveis ao exercício da cidadania, porque se reconheciam em patamar de igualdade com pessoas escolarizadas.

The terrestrial paleorecord of climate change over the past thousand years in the Canadian Rockies [abstract]

EXTRACT (SEE PDF FOR FULL ABSTRACT): High alpine environments provide a variety of paleorecords based on physical (glaciers, glacio-lacustrine sedimentation) and biological systems (tree rings, tree-line fluctuations). These records have varying temporal resolution and contain different climate-related signals but, in concert, provide a more comprehensive reconstruction of past climates than is possible from any single archive.

Discussion: Widening engineering horizons: Addressing the complexity of sustainable development

The following discussion is from an Institution of Civil Engineers (ICE) prestige lecture based on the original paper and delivered by the authors at the ICE in London on 24 September 2008.1 The event was chaired by Engineering Sustainability editorial panel chair, Professor Chris Rogers from Birmingham University. It was attended by an audience of 130 people as well as being watched by a similar number over a live web-cast. The web-cast can be accessed from the ICE archive for online viewing at http://scenta. interwise.com/etechb/ OnDemand/TH6509.

Sediment sources and the flood record from Wanghu lake, in the middle reaches of the Yangtze River

A sediment core was collected from the centre of Wanghu Lake, in the Middle Reaches of the Yangtze River. The recent part of the core was dated using a combination of Pb-210 and spheroidal carbonaceous particle (SCP) techniques. Extrapolating this chronology dated the laminated section of the core, between 723 and 881 mm, to the first half of the 18th century and this section was selected for detailed study. The thicknesses of the laminae were measured using reflecting and polarizing microscopes whilst geochemistry was determined by an electron probe. The thickness of the dark layers was found to be positively correlated with titanium concentrations, and negatively correlated with aluminium and potassium concentrations. The thickness of the light layers was found to be negatively correlated with the concentrations of titanium. It is concluded that the dark layers were deposited from the Fushui River, a tributary of the Yangtze River, under periods of normal flow whilst the light Layers were mainly deposited from the Yangtze River itself during flood periods. Documentary evidence for floods occurring in the take catchment corresponded with thick laminations of high titanium concentration. Further, two of the three thickest, light laminations with low titanium concentrations were found to be synchronous with recorded flood dates of the main Yangtze River in its Middle Reaches, but one was synchronous with a local drought. These data suggest that the Lake sediment provides an archive of the relative water levels of the Yangtze and Wanghu including floods of both the main Yangtze River and the local hydrological regime. (c) 2006 Elsevier B.V. All rights reserved.

激光器和电吸收调制器的动态特性研究

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-04-07T05:18:29Z No. of bitstreams: 1 博士论文哈森其其格：激光器和电吸收调制器的动态特性研究.pdf: 4109731 bytes, checksum: ebddabbb486d40eacc004f166b1c1365 (MD5)

Influence of ZnS and MgO Shell on the Photoluminescence Properties of ZnO Core/Shell Nanowire

Chinese Academy of Sciences；National Science Fund for Distinguished Young Scholar 60925016；National High Technology Research and Development program of China 2009AA034101；Postdoctoral Foundation 0971050000

低维体系中的量子相变及其研究方法

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-04-07T09:01:44Z No. of bitstreams: 1 10001_200718013607017李彦超_paper.pdf: 8237052 bytes, checksum: a2e86438d84113ac36c0cc7302649834 (MD5)

神经接口专用集成电路

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-04-07T08:58:22Z No. of bitstreams: 1 张旭论文电子版.pdf: 6590471 bytes, checksum: 9df3ec1aca65041f5b463108f6258d11 (MD5)

Fe 和(Ga,Cr)As 薄膜的分子束外延生长及磁学性质

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-04-28T14:23:05Z No. of bitstreams: 1 鲁军_博士论文.pdf: 4237580 bytes, checksum: 3a1a5f0ea10b0895d92e102e4cdcf5d0 (MD5)

Quantum Confinement Effects and Electronic Properties of SnO2 Quantum Wires and Dots

On the basis of the density functional theory (DFT) within local density approximations (LDA) approach, we calculate the band gaps for different size SnO2 quantum wire (QWs) and quantum dots (QDs). A model is proposed to passivate the surface atoms of SnO2 QWs and QDs. We find that the band gap increases between QWs and bulk evolve as Delta E-g(wire) = 1.74/d(1.20) as the effective diameter d decreases, while being Delta E-g(dot) = 2.84/d(1.26) for the QDs. Though the similar to d(1.2) scale is significantly different from similar to d(2) of the effective mass result, the ratio of band gap increases between SnO2 QWs and QDs is 0.609, very close to the effective mass prediction. We also confirm, although the LDS calculations underestimate the band gap, that they give the trend of band gap shift as much as that obtained by the hybrid functional (PBE0) with a rational mixing of 25% Fock exchange and 75% of the conventional Perdew-Burke-Ernzerhof (PBE) exchange functional for the SnO2 QWs and QDs. The relative deviation of the LDA calculated band gap difference Lambda E-g compared with the corresponding PBE0 results is only within 5%. Additionally, it is found the states of valence band maximum (VBM) and conduction band minimum (CBM) of SnO2 QWs or QDs have a mostly p- and s-like envelope function symmetry, respectively, from both LDA and PBE0 calculations.

弱局域和Kondo 效应

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-04-28T14:31:26Z No. of bitstreams: 1 宋小会博士后出站报告.pdf: 2964383 bytes, checksum: 7f0f018c9f3baad4363c7ea5e2547b63 (MD5)

First-principles prediction of the magnetism of 3d transition-metal-doped Rocksalt MgO

Using first-principles band structure methods, we have systematically studied the electronic structures, magnetic stabilities, and half-metal properties of 3d transition-metal (TM) doped Rocksalt MgO compounds TMMg3O4 (TM = V, Cr, Mn, Fe, Co, and Ni). The calculations reveal that only CrMg3O4 has a ferromagnetic stability among the six compounds, which is explained by double-exchange mechanism. The magnetic stability is affected by the doping concentration of TM if the top valance band is composed of partially occupied t(2g) states. In addition, CrMg3O4 is a half-metallic ferromagnet. The origins of half-metallic and ferromagnetic properties are explored. The Curie temperature (T-c) of CrMg3O4 is 182 K. And it is hard for CrMg3O4 to deform due to the large bulk modulus and shear modulus, so it is a promising spintronic material. Our calculations provide the first available information on the magnetic properties of 3d TM-doped MgO.

GaAs/InP 键合技术研究及其太阳电池应用

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-06-07T01:06:41Z No. of bitstreams: 1 晏磊--GaAs-InP键合技术研究及其太阳电池应用.pdf: 1948545 bytes, checksum: f2c55a092591dfa48fe9063fb432559f (MD5)

A new year message from Chinese Science Bulletin

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-04-13T14:02:33Z No. of bitstreams: 1 A new year message from Chinese Science Bulletin.pdf: 888462 bytes, checksum: 950ebfe3456fc0d42f8d058a5d2b3979 (MD5)

低维氧化锌半导体材料中的激子态

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-06-02T02:14:34Z No. of bitstreams: 1 熊稳.pdf: 995995 bytes, checksum: 873ae572930a1e29f1b2b5dca7bc280a (MD5)