Results 71 to 80 of about 14,167,410 (315)

Synthetic Demand Flow Generation Using the Proximity Factor

Forecasting
One of the biggest challenges in designing a logistics network is predicting the demand flows between all pairs of points in the network. Currently, the gravity model is mainly used for estimating the demand flow between points.
Ekin Yalvac, Michael G. Kay
doaj   +1 more source

Modeling repulsive gravity with creation [PDF]

Journal of Astrophysics and Astronomy, 2007
There is a growing interest in the cosmologists for theories with negative energy scalar fields and creation, in order to model a repulsive gravity. The classical steady state cosmology proposed by Bondi, Gold and Hoyle in 1948, was the first such theory which used a negative kinetic energy creation field to invoke creation of matter. We emphasize that
Vishwakarma, R. G., Narlikar, J. V.
openaire   +2 more sources

Workflow for Design of Experiments‐Based Modeling of Species Transport and Growth Kinetics in GaN Hydride Vapor Phase Epitaxy

Advanced Engineering Materials, EarlyView.
A novel workflow for investigating hydride vapor phase epitaxy for GaN bulk crystal growth is proposed. It combines Design of experiments (DoE) with physical simulations of mass transport and crystal growth kinetics, serving as an intermediate step between DoE and experiments.
J. Tomkovič, G. Lukin, H. Torkashvand, A. Kerschbaum, M. Müller, S. Besendörfer, J. Heitmann, J. Friedrich   +7 more
wiley   +1 more source

Brane-World Gravity [PDF]

, 2010
The observable universe could be a 1+3-surface (the “brane”) embedded in a 1+3+d-dimensional spacetime (the “bulk”), with Standard Model particles and fields trapped on the brane while gravity is free to access the bulk.
Roy Maartens, Kazuya Koyama, Maartens, Roy, Koyama, Kazuya   +3 more
core   +1 more source

High‐Resolution Corrosion Fingerprinting of Alloy Libraries via Microdroplet Spectroelectrochemistry

Advanced Engineering Materials, EarlyView.
Ionic‐liquid microdroplet spectroelectrochemistry enables stable, localized electrochemical measurements over extended timescales. By coupling impedance spectroscopy, wetting analysis, finite‐element simulations, and operando Raman spectroscopy, it disentangles geometrical and electrochemical effects, opening new opportunities for rapid corrosion ...
Ekaterina Kurchavova, Oumaïma Gharbi, Mireille Turmine, Vincent Vivier   +3 more
wiley   +1 more source

An extended gravity model with substitution applied to international trade [PDF]

The traditional gravity model has been applied many times to international trade flows, especially in order to analyze trade creation and trade diversion.
Jacob A. Bikker
core  

A convolutional neural network to optimize multi-mission satellite altimeter fusion for improving the marine gravity field

Earth, Planets and Space
Satellite altimetry is the main tool for constructing global or regional marine gravity fields. To improve the accuracy and spatial resolution, it is necessary to fuse multi-mission altimeters.
Qianqian Li, Zhenhe Zhai, Lifeng Bao, Yong Wang, Lin Wu, Guocheng Mao, Heping Sun   +6 more
doaj   +1 more source

Modeling Human Perception of Orientation in Altered Gravity

Frontiers in Systems Neuroscience, 2015
Altered gravity environments, such as those experienced by astronauts, impact spatial orientation perception and can lead to spatial disorientation and sensorimotor impairment.
Torin K. Clark, Torin K. Clark, Michael C. Newman, Charles M. Oman, Daniel M. Merfeld, Laurence R. Young   +5 more
doaj   +1 more source

Investigating the Effect of Inclination Angle and the Influence of Scan Parameters on the Appearance and Thermal and Mechanical Properties of Filigree Tension Rods of LPBF‐Manufactured NiTi Shape‐Memory Alloys

Advanced Engineering Materials, EarlyView.
This article investigates the dependence of the properties on the manufacturing orientation in the form of the inclination angle to the build plate of LPBF‐fabricated NiTi rods with a diameter of 150–220 µm. Metallographic, chemical, thermal, and mechanical characterization show behavior under identical manufacturing conditions that ranges from ...
Sandra Herzig, Michael Werner, Christian Rotsch   +2 more
wiley   +1 more source

Trade in Services: Does Gravity Hold? A Gravity Model Approach to Estimating Barriers to Services Trade [PDF]

This paper assesses the determinants of trade in services using a gravity model, with particular attention given to the role of barriers to services trade. Initially, the application of the gravity equation to services trade is examined.
Keith Walsh
core