989 resultados para 130


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This article examines some questions of statutory interpretation as they apply to section 130 of the Land Title Act 1994 (Qld)

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We report the growth of nanowires of the charge transfer complex tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ) with diameters as low as 130 nm and show that such nanowires can show Peierls transitions at low temperatures. The wires of sub-micron length were grown between two prefabricated electrodes (with sub-micron gap) by vapor phase growth from a single source by applying an electric field between the electrodes during the growth process. The nanowires so grown show a charge transfer ratio similar to 0.57, which is close to that seen in bulk crystals. Below the transition the transport is strongly nonlinear and can be interpreted as originating from de-pinning of CDW that forms at the Peierls transition.

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This paper presents a modified design method for linear transconductor circuit in 130 nm CMOS technology to improve linearity, robustness against process induced threshold voltage variability and reduce harmonic distortion. Source follower in the adaptively biased differential pair (ABDP) linear transconductor circuit is replaced with flipped voltage follower to improve the efficiency of the tail current source, which is connected to a conventional differential pair. The simulation results show the performance of the modified circuit also has better speed, noise performance and common mode rejection ratio compared to the ABDP circuit.

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We report a Raman study of single crystal pyrochlore Er(2)Ti(2)O(7) as a function of temperature from 12 to 300 K. In addition to the phonons, various photoluminescence (PL) lines of Er(3+) in the visible range are also observed. Our Raman data show an anomalous red-shift of two phonons (one at similar to 200 cm(-1) and another at similar to 520 cm(-1)) upon cooling from room temperature which is attributed to phonon-phonon anharmonic interactions. However, the phonons at similar to 310, 330, and 690 cm(-1) initially show a blue-shift upon cooling from room temperature down to about 130 K, followed by a red-shift, indicating a structural deformation at similar to 130 K. The intensities of the PL bands associated with the transitions between the various levels of the ground state manifold ((4)I(15/2)) and the (2)H(11/2) as well as (4)S(3/2) excited state manifolds of Er(3+) show a change at similar to 130 K. Moreover, the temperature dependence of the peak position of the two PL bands shows a change in their slope (d(omega)/d(T)) at similar to 130 K, thus further strengthening the proposal of a structural deformation. The temperature dependence of the peak positions of the PL bands has been analyzed using the theory of optical dephasing in crystals.

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Chronic recording of neural signals is indispensable in designing efficient brain–machine interfaces and to elucidate human neurophysiology. The advent of multichannel micro-electrode arrays has driven the need for electronics to record neural signals from many neurons. The dynamic range of the system can vary over time due to change in electrode–neuron distance and background noise. We propose a neural amplifier in UMC 130 nm, 1P8M complementary metal–oxide–semiconductor (CMOS) technology. It can be biased adaptively from 200 nA to 2 $mu{rm A}$, modulating input referred noise from 9.92 $mu{rm V}$ to 3.9 $mu{rm V}$. We also describe a low noise design technique which minimizes the noise contribution of the load circuitry. Optimum sizing of the input transistors minimizes the accentuation of the input referred noise of the amplifier and obviates the need of large input capacitance. The amplifier achieves a noise efficiency factor of 2.58. The amplifier can pass signal from 5 Hz to 7 kHz and the bandwidth of the amplifier can be tuned for rejecting low field potentials (LFP) and power line interference. The amplifier achieves a mid-band voltage gain of 37 dB. In vitro experiments are performed to validate the applicability of the neural low noise amplifier in neural recording systems.

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Contenido: Vida del espíritu / Octavio N. Derisi – El estudio del alma / Guillermo P. Blanco – Nota sobre los “grados de abstracción” / Gustavo E. Ponferrada – Nota sobre el concepto de “ente” en Tomás de Aquino (Dios: ¿ser o ente?) / William R. Darós – Notas y comentarios -- Bibliografía

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Bernardo Cabral (PMDB-AM), Relator da Comissão de Sistematização, entregou documento a Afonso Arinos com análise das emendas apresentadas ao anteprojeto da Constituição. Afonso Arinos (PFL-RJ) afirma que, pela primeira vez na história, é feita uma Constituinte sem um texto preliminar e que o anteprojeto é fruto de um processo democrático. Na reunião do Conselho Político do Governo, os líderes da Aliança Democrática defenderam a necessidade de entendimento em torno dos temas mais polêmicos da Constituinte. José Lourenço (PFL-BA) opina que o diálogo tem que ser retomado. Carlos Chiarelli (PFL-RS) afirma que uma Constituição duradoura é fruto do entendimento. Fernando Henrique Cardoso (PMDB-SP) acredita que o entendimento é possível, se for ao redor das teses que o povo quer como, por exemplo, no caso da Reforma Agrária. Fernando Gabeira, jornalista e escritor, explica as formas de participação popular na Assembleia Nacional Constituinte (ANC). Na sessão O Povo Pergunta, cidadão quer saber qual é a situação da educação e se há possibilidade de aumentar a verba em benefício dela. João Calmon (PMDB-ES) responde que corre sério risco a proposta de vinculação de 18% da receita de impostos federais e de, no mínimo, 25% da receita de impostos estaduais e municipais para a educação e conclama a população a se manifestar em favor do aumento dos recursos. Outro cidadão quer saber como a Constituinte vai melhorar o atendimento médico e a saúde da população. Euclides Scalco (PMDB-PR) responde que deve ser criado o Fundo Nacional de Saúde, composto pelos 30% dos recursos da seguridade e outros recursos estaduais, municipais e do orçamento da União para garantir assistência plena e para que se implante, definitivamente, o Sistema Único de Saúde no país.

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In the waterbodies of central Russia, the Urals and western Siberia four species of Crustacea, related to the genus Mesocyclops, are widely distributed: M. (s.str.) leuckarti (Claus), M. (Thermocyclops) oithonoides Sars, [M.](Th.) crassus (Fisch.) and M. (Th.) dybowskii (Lande). Numbers and biomass of Mesocyclops oithonoides in the pelagic water of various water-bodies of the Urals are presented and observations on the above mentioned species are discussed.

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In fresh waters the planktonic Crustacea are represented mainly by the two large groups, the Copepoda and the Cladocera. This study focuses on Holopedium gibberum and examines if the plankton is an indicator of soft-water lakes. H. gibberum is found throughout the northern half of the globe but its distribution is scattered and irregular. The study is based on a literature review and samples taken from water bodies in Norway.

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It is known that an adequately large amount of work has been devoted to investigations on the influence of temperature on the growth period of aquatic invertebrates. However, the action of the given factors on the basic biological characteristics of embryonic growth in crustaceans is virtually unknown. An experimental study of the effectiveness of the transformation of matter and energy during the period of embryogenesis in the isopod Asellus aquaticus L. under different constant temperatures was carried out. Specimens were collected in the quarry lakes of the Kurasovshchin zone (city-Minsk). The authors developed a quantitative analysis of the basic energetic properties of animals during one of the physiological stages at different constant temperatures, which allows one to determine the temperature range in which the expenditure of energy, at a given instance during embryonic growth, is minimised. For A. aquaticus this range is represented by the limits 10-22°C, during which the least expenditure of energy is observed between 14.5 and 18.8°C.