Results 131 to 140 of about 805,001 (346)

On the origin of the gravitational quantization: The Titius--Bode Law

open access: yes, 2005
Action at distance in Newtonian physics is replaced by finite propagation speeds in classical post--Newtonian physics. As a result, the differential equations of motion in Newtonian physics are replaced by functional differential equations, where the ...
Agnese   +29 more
core   +4 more sources

Influence of a Hydrogen Addition to the Inert Gas and Subsequent Heat Treatments on the Microstructure and Mechanical Properties of Magnesium WE43 Fabricated by PBF‐LB/M

open access: yesAdvanced Engineering Materials, EarlyView.
This article investigates optimal processing conditions for the laser‐based powder bed fusion of WE43. To limit the interaction with remaining oxygen, a 3 vol% hydrogen admixture to the inert gas is investigated. Furthermore, heat treatments are investigated in the range of 250–350 °C for 48 h.
Arvid Abel   +9 more
wiley   +1 more source

Research Investigation Directed Toward Extending the Useful Range of the Electromagnetic Spectrum [PDF]

open access: yes
The report discusses completed and proposed research in atomic and molecular physics conducted at the Columbia Radiation Laboratory from July 1972 to June 1973.
Happer, W., Hartmann, S. R.
core   +1 more source

An Examination of Aerosol Jet‐Printed Surface Roughness and its Impact on the Performance of High‐Frequency Electronics

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores aerosol jet‐printed (AJP) surface roughness, its effects on the performance of microwave electronics, and its process contributors. First, an electromagnetic model is vetted for AJP's unique roughness signature. Simulations are built which show process‐induced roughness is as significant as conductor resistivity in driving microwave
Christopher Areias, Alkim Akyurtlu
wiley   +1 more source

Occupational radiation exposure analysis in industrial radiography in Bangladesh

open access: yesRadiation Medicine and Protection
Objective: To evaluate the workload management and guarantee the technical concerns for an appropriate radiation protection method in non-destructive testing (NDT) industries in Bangladesh. Methods: The radiation exposure for 721 workers was investigated
Mehedi Hassan   +6 more
doaj  

Design and development of DC to DC voltage booster to integrate with PbTe/TAGS-85 based thermoelectric power generators

open access: yesMaterials Science for Energy Technologies, 2019
Thermoelectric power generators (TEGs) based on Seebeck effect convert waste heat into electricity. However, the practical applications of such TEGs are limited by their low output DC voltage (10–300 mV).
S.K. Sahu   +10 more
doaj  

The switching dynamics of the bacterial flagellar motor

open access: yesMolecular Systems Biology, 2009
Many bacteria are propelled by flagellar motors that stochastically switch between the clockwise and counterclockwise rotation direction. Although the switching dynamics is one of their most important characteristics, the mechanisms that control it are ...
Siebe B van Albada   +2 more
doaj   +1 more source

Probing exotic phenomena at the interface of nuclear and particle physics with the electric dipole moments of diamagnetic atoms: A unique window to hadronic and semi-leptonic CP violation

open access: yes, 2017
The current status of electric dipole moments of diamagnetic atoms which involves the synergy between atomic experiments and three different theoretical areas -- particle, nuclear and atomic is reviewed. Various models of particle physics that predict CP
@@endQCD Collaboration   +440 more
core   +1 more source

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