Results 61 to 70 of about 924,080 (195)

Study on the macro–micro evolution of compaction characteristics of coal gangue with different grain sizes under side-limit compression conditions

Scientific Reports
Currently the main method of mine solid waste disposal and utilization is to apply gangue to underground filling. For the grading characteristics of coal gangue in the hollow zone in underground filling, the state of pressure and the mechanical ...
Zhenzhi Liu, Ping Liu, Zhen Lu, Jian Li, Chang Luo   +4 more
doaj   +1 more source

Electrochemical etching technique for analyzing the shape and spatial arrangement of graphite inclusions in as‑cast and plastically deformed cast iron

Литьë и металлургия
The technique for revealing the shape and spatial arrangement of graphite inclusions in the structure of cast iron and the scheme of the corresponding device are proposed.
A. I. Pokrovsky
doaj   +1 more source

Numerical and Experimental Evaluation of a Simplified Lateral Spring Formulation for Rocking Structures

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Rocking podium isolation systems have gained significant research interest as a method of limiting seismic demands on superstructures and eliminating residual post‐earthquake drifts through self‐centring behaviour. However, while numerous models of varying complexity, including analytical, phenomenological, and physical formulations, have been
Marawan Zaki, Chiyun Zhong, Constantin Christopoulos   +2 more
wiley   +1 more source

Solid cylinder rolling in a turnable hollow cylinder

, 2016
A small solid cylinder rolls inside a hollow cylinder that can turn around its symmetry axis. It is assumed that the small cylinder cannot slide. Furthermore, the differential equation used here is only exact for small amplitudesComponente Curricular ...
Meyer, Christoph
core   +2 more sources

Demineralized bone allograft fibers versus particulate in sinus augmentation: A double‐arm randomized controlled and histomorphometric study

Journal of Periodontology, EarlyView.
Abstract Background The primary aim of this study was to evaluate histologic wound healing of demineralized freeze‐dried bone allograft (DFDBA), in particulate (P) or fiber (F) form, in combination with deproteinized bovine bone mineral (DBBM) for maxillary sinus floor augmentation.
Kathryn Gabel, Brian L. Mealey, Michael Mills, Archontia A. Palaiologou   +3 more
wiley   +1 more source

Microthrusters based on the T5 and T6 hollow cathodes

, 2011
Small spacecraft with limited on-board resources would benefit greatly from the development of a low power, low cost microthruster able to offer propellant savings over conventional alternatives and enable higher energy missions.
Grubisic, Angelo Niko, Grubisic, Angelo
core   +1 more source

Structural response of concrete-filled elliptical steel hollow sections under eccentric compression [PDF]

, 2012
The purpose of this research is to examine the behaviour of elliptical concrete-filled steel tubular stub columns under a combination of axial force and bending moment. Most of the research carried out to date involving concrete-filled steel sections has
Sheehan, Therese, Sheehan, T. (Therese), Lam, D., Chan, T. M., Lam, Dennis, Chan, T.M., Dai, X. H., Chan, Tak-Ming, Dai, Xianghe, Sheehan, T.   +9 more
core   +1 more source

Predicting Mesoscopic Larmor Frequency Shifts in Ex Vivo Porcine Optic Nerve

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Larmor frequency shifts in white matter (WM) vary with fiber orientation due to anisotropic microstructure. Since clinical voxels are significantly larger than these microscopic frequency variations, the measured signal represents a bulk average of local shifts.
Anders Dyhr Sandgaard, André Pampel, Roland Müller, Niklas Wallstein, Toralf Mildner, Carsten Jäger, Markus Morawski, Aage Kristian Olsen Alstrup, Harald E. Möller, Sune Nørhøj Jespersen   +9 more
wiley   +1 more source

Hollow cathode life time modelling

, 2008
Hollow Cathodes (HCs) are of primary importance in the field of electric space propulsion, being used as electron sources in ion and Hall-effect thrusters.
Coletti, Michele
core   +1 more source

Buckling of slender composite concrete‐filled steel columns

Journal of Civil Engineering and Management, 2010
The paper presents the analysis of the experimental data of 1817 on concrete‐filled steel tubes ‐ CFSTs. These results are compared with the predicted results of the load‐bearing capacity of calculations of slender elements according to the methods ...
C. Douglas Goode, Artiomas Kuranovas, Audronis Kazimieras Kvedaras   +2 more
doaj