Diário da Constituinte [gravação de vídeo] : [programa n. 132A]

Os membros da Comissão de Sistematização da Assembleia Nacional Constituinte (ANC) examinarão o anteprojeto, com as emendas de adequação incorporadas. O PDT realizou o I Congresso Brasileiro do Socialismo Democrático, tendo como convidado especial o ex-dirigente do Partido Comunista Luiz Carlos Prestes. A crise na indústria automobilística provoca demissão em massa. O Ministro do Trabalho Almir Pazzianoto entende que o trabalhador não pode ser demitido arbitrariamente, como ainda acontece. Mário Lima (PMDB-BA) diz que o grande custo das empresas é o setor financeiro, não o trabalhador. A garantia ao emprego estável faz parte do anteprojeto do Deputado Bernardo Cabral (PMDB-AM). Max Rosenmann (PMDB-PR) diz que a proposta será um fator que vai inibir a geração de dois milhões de empregos de que a juventude necessita para entrar no mercado de trabalho. O sindicalista Vicentinho afirma que não havendo demissões, os trabalhadores poderão comprar mais, o que criará mercado interno e beneficiará também as empresas. Octávio Elísio (PMDB-MG) esclarece que a estabilidade não oferece risco para a economia, mas o ponto a ser negociado é o tempo necessário para o trabalhador adquirir esta estabilidade. Stélio Dias (PFL-ES) critica o prazo de três meses para o contrato de experiência. Arnaldo Faria de Sá (PTB-SP) diz que é preciso encontrar uma fórmula intermediária. O Ministro Almir Pazzianoto acha que deve constar na Constituição a menção a um sistema de garantias de emprego e a preservação do instituto do Fundo de Garantia . Olívio Dutra (PT-RS) acredita que a apenas a estabilidade não resolve o problema do mercado de trabalho, mas minimiza o sofrimento de um contingente grande de trabalhadores.

Oscillatory Flow Induced Hydrodynamic Forces upon a Pipeline near Erosive Sandy Seabed

An experimental study of the properties of hydrodynamic forces upon a marine pipeline is presented in this paper, in the equilibrium scour conditions for various Keulegan-Carpenter numbers and various initial relative gaps between pipeline and the erosive sandy seabed. The tests are conducted in a U-shaped oscillatory water tunnel with a sand box located at the bottom of the test section. According to the experimental results, the maximum horizontal forces on the pipelines with an initial gap to seabed will decrease to some extent due to scouring process. For engineering appliances, it seems safer to estimate wave induced forces on pipelines under the assumption that seabed is plane. However, it should be noticed that great changes would be brought to the frequency properties of lift forces because of the sandy scour beneath the pipeline, which occurs for certain KC numbers.

Rayleigh-Marangoni-Bénard Convective Instability

The Rayleigh-Marangoni-Benard convective instability (R-M-B instability) and flow patterns in the two-layer system of silicon oil 10cSt and Fluorinert FC70 liquids are studied theoretically and experimentally. Both linear instability analysis and 2D numerical simulation (A=L/H=10) were performed to study the influence of thermocapillary force on the convective instability of the two-layer system. Time-dependent oscillations arising at the onset of convection were investigated in a larger various range of two-layer depth ratios (Hr=H1/H2) from 0.2 to 5.0 for different total depth less than 12mm. Our results are different from the previous study on the Rayleig-B閚ard instability and show the strong effects of thermocapillary force at the interface on the time-dependent oscillations at the onset of instability convection. Primary experimental results of the critical instability parameters and the convective structure in the R-M-B convection have been obtained by using the digital particle image velocimetry (DPIV) system, and a good agreement in comparison with the results of numerical simulation was obtained.

The Effects of Backfill Soil Properties on Wave-induced Pore Pressures around a Trenched Pipeline

Offshore pipelines are always trenched into seabed to reduce wave-induced forces and thereby to enhance their stability. The trenches are generally backfilled either by in-site sediments or by depositing selected backfill materials over the pipeline from bottom-dump barge. The actual waves in shallow water zone are always characterized as nonlinear. The proper evaluation of the wave-induced pressures upon pipeline is important for coastal geotechnical engineers. However, most previous investigations of the wave–seabed–pipe interaction problem have been concerned only with a single sediment layer and linear wave loading. In this paper, based on Biot’s consolidation theory, a two-dimensional finite element model is developed to investigate non-linear wave induced pore pressures around trenched pipeline. The influences of the permeability of backfill soil and the geometry profiles of trenches upon soil responses around pipeline are studied respectively.

Subcooled Pool Boiling at Microgravity: Preliminary Ground-Based Experimental Results

A temperature-controlled pool boiling (TCPB) device was developed to perform pool boiling heat transfer studies at both normal gravity on Earth and microgravity in the drop tower Beijing and aboard a Chinese recovery satellite. Two platinum wires of 60 ?m in diameter were simultaneously used as heaters and thermometers. The lengths were 30 mm and 40 mm, respectively. The ends of wires were soldered with copper poles to provide low resistance paths for the electric current. The heater resistance, and thus the heater temperature, was kept constant by a feedback circuit similar to that used in constant-temperature hot-wire anemometry. The fluid was R113 at 0.1 Mpa and subcooled by 30 ?C nominally for all cases. The results of the experiments at normal gravity were presented. Four modes, namely single-phase convection, nucleate boiling, transition two-mode boiling, and film boiling were observed. A few data obtained from several preliminary experiments at microgravity in the drop tower Beijing were also presented. A slight increase of the heat flux was obtained.

Diário da Constituinte [gravação de vídeo] : [programa n. 570]

Concessão de entrevista pelo Presidente Ulysses Guimarães sobre a duração do mandato do Presidente da República, José Sarney. Emendas apresentadas sobre o tempo de duração do mandato do Presidente da República: 5 anos, 4 anos (Constituinte Fernando Henrique Cardoso) e 4 anos e meio (Constituintes Heráclito Fortes e Saulo Queiroz). Defesa da possibilidade de coincidir as eleições presidenciais com as eleições municipais. No tocante ao capítulo Comunicação Social, foram discutidas a criação do Conselho Nacional de Comunicação; de marco regulatório sobre a concessão e renovação de canais de rádio e televisão. Defesa por representantes de artistas e de jornalistas da regionalização da produção cultural como mecanismo de combate à formação de oligopólios na comunicação em massa.

Formation of Single and Multiple Deformation Twins in Nanocrystalline fcc Metals

Deformation twins are often observed to meet each other to form multi-fold twins in nanostructured face-centered cubic (fcc) metals.Here we propose two types of mechanism for the nucleation and growth of four different single and multiple twins. These mechanisms provide continuous generation of twinning partials for the growth of the twins after ucleation. A relatively high stress or high strain rate is needed to activate these mechanisms, making them more prevalent in nanocrystalline materials than in their coarse-grained counterparts.Experimental observations that support the proposed mechanisms are presented.