Results 81 to 90 of about 1,034,247 (306)

Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Ludger Overmeyer, Annika Raatz   +5 more
wiley   +1 more source

ALTERAÇÕES MICROMETEOROLÓGICAS CAUSADAS POR TÚNEIS BAIXOS DE TELA PLÁSTICA PRETA CULTIVADOS COM ALFACE

Ciência Rural, 1994
RESUMO Foram determinadas alterações micrometeorológicas causadas por tela plástica preta com 18, 30 e 50% de atenuação da radiação solar incidente, durante os meses de verão, em Santa Maria, RS.
Galileo Adeli Buriot, Nereu Augusto Streck, Eliseo Salvatierra Gimenes, Flávio Miguel Schneider   +3 more
doaj   +1 more source

Sistema de medição e controlo de qualidade do ar interior [PDF]

, 2016
A crise do petróleo na década de 70 levou o homem a construir edifícios com melhor isolamento térmico e energeticamente mais eficientes. Apesar destas mudanças construtivas terem reflexos positivos em termos consumo de energia e de conforto térmico ...
Feliciano, Manuel, Fernandes, Samuel, Igrejas, Getúlio   +2 more
core  

Investigation of Thermo‐Chemical Processes in Commercial MgO‐C Refractory Bricks With and Without MgO‐C Recyclate at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This study investigates thermo‐chemical processes during high‐temperature testing of two commercial MgO‐C brick grades, one containing 47.5 wt.% MgO‐C recyclate. Using ETV, DTA/TG‐MS, XRD, and SEM/EDS/EBSD, mechanisms such as carbothermal reduction of magnesia, impurity incorporation into the secondary MgO surface layer, and calcium‐rich phase ...
Alexander Schramm, Jana Hubálková, Christian Schimpf, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +6 more
wiley   +1 more source

Abundances and density structure of the inner circumstellar ring around SN 1987A

, 2010
We present optical spectroscopic data of the inner circumstellar ring around SN 1987A from the Anglo-Australian Telescope (AAT) and the Very Large Telescope (VLT) between ~1400 and ~5000 days post-explosion.
Bautista, Bautista, Blinnikov, Borkowski, Bouchet, Brandner, Chevalier, Claes Fransson, Cumming, Dewey, Dwek, Garstang, Hasinger, Heng, Heng, Howarth, Hughes, Hummer, Lawrence, Lundqvist, Lundqvist, Lundqvist, Mattila, Mattila, Meikle, Menzies, Michael, Ng, Nussbaumer, Osterbrock, Park, Per Gröningsson, Peter Lundqvist, Peter Meikle, Porter, Pun, Raylee Stathakis, Russell Cannon, Seppo Mattila, Sonneborn, Sugerman, Wampler, Wampler, Wang, Wang, Zhekov, Zhekov, Zhekov   +47 more
core   +1 more source

Thermophysical Properties of the Desulphurization Slags With Various CaS and CaO/Al2O3 Ratio

Advanced Engineering Materials, EarlyView.
This article investigates how CaS content and the CaO/Al2O3 ratio influence the thermophysical properties of desulphurization slags. Using experimental measurements and thermodynamic simulations, this study reveals complex effects on viscosity, surface tension, and density, providing new insight into slag structure and phase behavior under ...
Eldar Salpagarov, Matheus Roberto Bellé, Anton Yehorov, Julia Richter, Olena Volkova   +4 more
wiley   +1 more source

Metodologia de construção de um edifício saudável

Revista Portuguesa de Pneumologia, 2004
RESUMO: No presente trabalho indica-se uma metodologia que tem sido utilizada com sucesso em diversas situações, para garantir a construção de um edifício saudável, em termos da qualidade do ar interior (QAI) no que diz respeito às emissões resultantes ...
João Fernando Pereira Gomes
doaj   +1 more source

Consumo energético, conforto e qualidade do ar em salas de aula de edifícios escolares do período JCETS - MOP [PDF]

, 2012
As infraestruturas escolares públicas existentes têm sido objeto de investimentos de renovação e melhoramento significativos num momento em que a legislação estabelece valores máximos de concentração de poluentes caracterizadores da qualidade do ar no ...
Duarte, Rogério, Pereira, Marco
core  

Helioseismological Implications of Recent Solar Abundance Determinations

, 2004
We show that standard solar models are in good agreement with the helioseismologically determined sound speed and density as a function of solar radius, the depth of the convective zone, and the surface helium abundance, as long as those models do not ...
Aldo M. Serenelli, Antia H. M., Antia H. M., Asplund M., Asplund M., Bahcall J. N., Balmforth N. J., Basu S., Basu S., Christensen-Dalsgaard J., Dziembowski W. A., Elliott J. R., Grevesse N., John N. Bahcall, Kosovichev A. G., Marc Pinsonneault, Pijpers F. P., Pijpers F. P., Sarbani Basu, Schlattl H., Seaton M. J., Tripathy S. C.   +21 more
core   +4 more sources

Element Stratification in the Middle-Aged Type Ia Supernova Remnant G344.7-0.1

, 2020
Despite their importance, a detailed understanding of Type Ia supernovae (SNe Ia) remains elusive. X-ray measurements of the element distributions in supernova remnants (SNRs) offer important clues for understanding the explosion and nucleosynthesis ...
Fukushima, Kotaro, Katsuda, Satoru, Kobayashi, Shogo B., Lopez, Laura A., Matsushita, Kyoko, Park, Sangwook, Plucinsky, Paul P., Sano, Hidetoshi, Slane, Patrick O., Yamaguchi, Hiroya   +9 more
core   +1 more source