Results 101 to 110 of about 694,974 (290)

Gas and Dust Emission at the Outer Edge of Protoplanetary Disks

, 2008
We investigate the apparent discrepancy between gas and dust outer radii derived from millimeter observations of protoplanetary disks. Using 230 and 345 GHz continuum and CO J=3-2 data from the Submillimeter Array for four nearby disk systems (HD 163296,
A. M. Hughes, C. Qi, D. J. Wilner, Dutrey A., Dutrey A., Dutrey A., Hoff W., Hogerheijde M. R., Lynden-Bell D., M. R. Hogerheijde, Shakura N. I., The P. S., van den Ancker M. E.   +12 more
core   +1 more source

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

Advanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie, David Kramer, Thomas Scheithauer, Hans Jürgen Maier, Thomas Hassel   +4 more
wiley   +1 more source

MESOSCOPIC SCALE MINIMUM CUTTING THICKNESS MODEL AND ANALYSIS

Jixie qiangdu, 2022
Aiming at the minimum cutting thickness existing in mesoscopic cutting process, the formation mechanism of the minimum cutting thickness was described, and the theoretical model of minimum cutting thickness based on tool edge radius and friction ...
ZHU JiaWei, LEI XiaoBao, ZHANG Tao
doaj  

Silica heat shield sizing [PDF]

The sensitivity of silica heat shield requirements to gap width, tile edge radius, and heat transfer distribution within tile gaps was investigated. A two-dimensional thermal model was modified and used to determine the effect of two dimensional heat ...
Christensen, H. E., Ebbesmeyer, L. H.
core   +1 more source

Engineering Deformation and Failure in Diamond Triply Periodic Minimal Surface Lattices via 3D Wall‐Thickness Grading

Advanced Engineering Materials, EarlyView.
The work demonstrates that strategic wall‐thickness grading in diamond triply periodic minimal surface lattices enables precise tuning of deformation and failure behavior under compression. Different gradation patterns guide how and where the structure collapses, improving energy absorption or promoting controlled brittle failure.
Giovanni Rizza, Danilo Bruson, Manuela Galati, Luca Iuliano   +3 more
wiley   +1 more source

An Image Processing Approach to Measuring the Sphericity and Roundness of Fracturing Proppants

IEEE Access, 2019
Before being applied in oil fields, it is necessary to evaluate the quality of the fracturing proppants, for which sphericity and roundness are the two important parameters.
Xinrong Lyu, Fuyu Liu, Peng Ren, Christos Grecos   +3 more
doaj   +1 more source

Electronic structure of triangular, hexagonal and round graphene flakes near the Fermi level

, 2008
The electronic shell structure of triangular, hexagonal and round graphene quantum dots (flakes) near the Fermi level has been studied using a tight-binding method.
Berger C, Borghis F E, Castro Neto A H, de Heer W A, Elliot S R, H P Heiskanen, J Akola, Janssens E, Krishnamurthy H R, Lame M G, Li G Luican A Andrei E Y, M Manninen, Manninen M   +12 more
core   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Note of the radius of curvature of a cutting edge [PDF]

Proceedings of the Royal Society of London, 1897
The following note may be of interest, partly as indicating the extreme thinness to which a cutting edge may be brought by the ordinary process of grinding, and partly also as showing how readily the wave-length of light may be used, with only the simplest appliances, as a practical unit for the measurement of small distances.
openaire   +1 more source

Understanding and Optimizing Li Substitution in P2‐Type Sodium Layered Oxides for Sodium‐Ion Batteries

Advanced Functional Materials, EarlyView.
This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous 
Mingfeng Xu, Giovanni Gammaitoni, Michael Häfner, Eduardo Villalobos‐Portillo, Carlo Marini, Matteo Bianchini   +5 more
wiley   +1 more source