Results 211 to 220 of about 887,698 (266)
Some of the next articles are maybe not open access.
The Martian Surface Composition
Space Science Reviews, 2001Mars is unique to have undergone all planetary evolutionary steps, without global resets, till its geological death: this is reflected in the variety of its surface features. The determination of Mars surface composition has thus the potential to identify the processes responsible for the entire Mars evolution, from geological timescales to seasonal ...
Jean-Pierre Bibring, Stéphane Erard
openaire +1 more source
Surface composition of polystyrene
Journal of Applied Polymer Science, 1988AbstractThe physical and chemical properties of bulk polymers are well understood and have been measured exhaustively for numerous systems, but the properties of polymer surfaces are quite often different from those observed in the bulk and are usually not as easily measurable. Since many polymer properties vary with molecular weight, it is of interest
Ronald D. Goldblatt +4 more
openaire +1 more source
In some respects, the surface of Titan is one of the most Earth-like places in the solar system. However, two properties distinguish the surface of Titan from that of Earth: temperature and chemistry. Titan's mean surface temperature is −180°C (∼90 K), and water-ice plays the role that igneous and other types of silicate rocks play in the Earth's crust.
Solomonidou, Anezina +3 more
openaire +2 more sources
Solomonidou, Anezina +3 more
openaire +2 more sources
Surface Composition of Wustite
Berichte der Bunsengesellschaft für physikalische Chemie, 1980AbstractUsing a solid electrolyte cell inside an UHV‐system the surface composition of oxides and metals can be studied at high temperatures 700 to 1000°C and well defined oxygen activities in the range po2 = 10−10 to 10−25 bar. AES‐measurements on wustite have shown that at temperatures > 800°C the composition of the surface shows the same change ...
H. J. Grabke, H. Viefhaus
openaire +1 more source
Composite Failure Surface Analysis
Journal of Composite Materials, 1980In this work, the features of the fracture surfaces of graphite-epoxy specimens as seen by both optical and scann ing electronic microscope (SEM) are presented. A variety of test conditions were investigated. They are: tension (quasi- static), compression (quasi-static), and tension-tension fatigue. Failure due to delamination was also studied (Mode I-
R.A. Kline, F.H. Chang
openaire +1 more source
Icarus, 1979
Broadband (J, H, K and L) and narrowband (1.5- to 3.7-micron) infrared photometry of Pluto has been conducted in order to check previous ambiguous observations of methane frost on the planet's surface. In detail, the match between a laboratory spectrum of methane frost and the observed spectrum of Pluto is not good.
L.A. Lebofsky, G.H. Rieke, M.J. Lebofsky
openaire +1 more source
Broadband (J, H, K and L) and narrowband (1.5- to 3.7-micron) infrared photometry of Pluto has been conducted in order to check previous ambiguous observations of methane frost on the planet's surface. In detail, the match between a laboratory spectrum of methane frost and the observed spectrum of Pluto is not good.
L.A. Lebofsky, G.H. Rieke, M.J. Lebofsky
openaire +1 more source
Surface Compositional Semantics
1989The distinction between the literal meaning of expressions and the speaker meaning of utterances (see Chapter 11) is the communication-theoretic precondition for a surface-compositional syntax and semantics.1 Adoption of the surface compositional approach to the syntax and semantics of natural language has two kinds of empirical consequences: (i) the ...
openaire +1 more source
1994
Abstract The first questions to be asked about a surface are: what atoms are present and what are their concentrations? If techniques can be found to provide the answers to these questions, then the next, more detailed, question is: how are the atoms bound to each other? These are the questions of surface chemistry.
openaire +1 more source
Abstract The first questions to be asked about a surface are: what atoms are present and what are their concentrations? If techniques can be found to provide the answers to these questions, then the next, more detailed, question is: how are the atoms bound to each other? These are the questions of surface chemistry.
openaire +1 more source
Progress in Surface Science, 1981
Abstract The practical importance of alloy surfaces in catalysis, corrosion andother aspects of materials performance is widely recognized. What is needed now is sufficient knowledge of the relationship between externally controllable factors — alloy composition, temperature, environment — and surface properties — composition, structure, chemical ...
M.J. Kelley, V. Ponec
openaire +1 more source
Abstract The practical importance of alloy surfaces in catalysis, corrosion andother aspects of materials performance is widely recognized. What is needed now is sufficient knowledge of the relationship between externally controllable factors — alloy composition, temperature, environment — and surface properties — composition, structure, chemical ...
M.J. Kelley, V. Ponec
openaire +1 more source
Surface Composition as Bridging
Journal of Semantics, 2001The development of explicit theories of dynamic context change has led to a fundamentally new perspective on the interpretation of discourse. In this paper I show that this development also opens up the possibility of approaching subclausal composition along similar lines.
openaire +1 more source