Results 61 to 70 of about 5,829,464 (200)

Two-step rocket engine bipropellant valve concept [PDF]

, 1969
Initiating combustion of altitude control rocket engines in a precombustion chamber of ductile material reduces high pressure surges generated by hypergolic propellants.
Capps, J. E., Ferguson, R. E., Pohl, H. O.   +2 more
core   +1 more source

What are the left-handed media and what is interesting about them? [PDF]

, 2004
We review the intensively discussed ideas about wave propagation and refraction in media where both electric permittivity and magnetic permeability are negative. The criticism against negative refraction as violating the causality principle is considered.
Bliokh, K. Yu., Bliokh, Yu. P.
core   +1 more source

Dark Matter directional detection: comparison of the track direction determination

, 2016
Several directional techniques have been proposed for a directional detection of Dark matter, among others anisotropic crystal detectors, nuclear emulsion plates, and low-pressure gaseous TPCs.
Couturier, C., Naraghi, F., Santos, D., Sauzet, N., Zopounidis, J. P.   +4 more
core   +3 more sources

Instabilities in the dissolution of a porous matrix [PDF]

, 2011
A reactive fluid dissolving the surrounding rock matrix can trigger an instability in the dissolution front, leading to spontaneous formation of pronounced channels or wormholes.
A. J. C. Ladd, Aharonov, Chadam, Daccord, Dreybrodt, Ennis-King, Fredd, Fryar, Golfier, Hinch, Lund, Lund, Noiriel, Ortoleva, P. Szymczak, Romanov, Sherwood, Szymczak, Tan   +18 more
core   +2 more sources

INITIAL BREEDING MATERIAL FOR DEVELOPMENT OF PEA VARIETIES IN THE KUBAN

Овощи России, 2016
Results of two yeaґs field studying of 522 samples of peas are presented. Twenty-five samples with valuable agronomic traits were selected for further breeding program. Correlation between duration of interstage periods was revealed.
O. V. Alikina, A. G. Besedin
doaj   +1 more source

Quantitative photoacoustic tomography with piecewise constant material parameters [PDF]

, 2015
The goal of quantitative photoacoustic tomography is to determine optical and acoustical material properties from initial pressure maps as obtained, for instance, from photoacoustic imaging.
Naetar, Wolf, Scherzer, Otmar
core  

Morphological characterization of shocked porous material

, 2009
Morphological measures are introduced to probe the complex procedure of shock wave reaction on porous material. They characterize the geometry and topology of the pixelized map of a state variable like the temperature.
Aiguo Xu, Guangcai Zhang, Guo Y J, Hadwiger H, Harlow F H, Jianshi Zhu, Pan X F, Pan X F, Ping Zhang, Winitzki S Kosowsky A, X F Pan, Xu A, Xu A, Yang Q, Zhang B   +14 more
core   +1 more source

Effects of initial body weight and litter material on broiler production

Brazilian Journal of Poultry Science, 2011
This experiment was carried out in a 104 m² poultry house located between the geographical coordinates 25°45'00" south latitude and 53°03'25" west longitude and an average altitude of 550 m, from September to November, 2008.
AS Mendes, SJ Paixão, R Restelatto, R Reffatti, JC Possenti, DJ de Moura, GMZ Morello, TMR de Carvalho   +7 more
doaj   +1 more source

The Additive Manufacturing of Aluminum Matrix Nano Al₂O₃ Composites Produced via Friction Stir Deposition Using Different Initial Material Conditions. [PDF]

Materials (Basel), 2022
El-Sayed Seleman MM, Ataya S, Ahmed MMZ, Hassan AMM, Latief FH, Hajlaoui K, Hajlaoui K, El-Nikhaily AE, Habba MIA.   +8 more
europepmc   +1 more source

Material Agency in the Urban Material Culture Initiative

Museum Anthropology, 2014
AbstractThis contribution to the discussion of collecting contemporary objects reviews the implications of taking seriously how and what objects communicate, especially how we can identify the ways messages are coded in the forms of familiar objects. Of special interest are the conceptual tools that are available to differentiate these messages when ...
openaire   +2 more sources