Results 51 to 60 of about 34,402 (164)

Detection of a period decrease in NN Ser with ULTRACAM: evidence for strong magnetic braking or an unseen companion? [PDF]

open access: yes, 2005
We present results of high time resolution photometry of the eclipsing pre-cataclysmic variable NN Ser. We observed 13 primary eclipses of NN Ser using the high-speed CCD camera ULTRACAM and derived times of mid-eclipse, from fitting of light curve ...
Andronov   +39 more
core   +3 more sources

Hierarchical Operation Optimization for Regenerative Braking Energy Utilizing in Urban Rail Traction Power Supply System

open access: yesEnergies, 2023
The energy feedback system (EFS) is widely accepted to utilize the regenerative braking energy (RBE) in an urban rail traction power supply system (TPSS).
Hao Zhang   +4 more
doaj   +1 more source

Disc formation in turbulent massive cores: Circumventing the magnetic braking catastrophe

open access: yes, 2012
We present collapse simulations of 100 M_{\sun}, turbulent cloud cores threaded by a strong magnetic field. During the initial collapse phase filaments are generated which fragment quickly and form several protostars.
Allen   +37 more
core   +1 more source

Accretion and magnetic field morphology around Class 0 stage protostellar discs [PDF]

open access: yes, 2014
We analyse simulations of turbulent, magnetised molecular cloud cores focussing on the formation of Class 0 stage protostellar discs and the physical conditions in their surroundings.
Banerjee, R.   +3 more
core   +1 more source

Brain serotonin synthesis capacity in obsessive-compulsive disorder: effects of cognitive behavioral therapy and sertraline. [PDF]

open access: yes, 2018
Cognitive behavioral therapy (CBT) and selective serotonin reuptake inhibitors (SSRIs) are both effective treatments for some patients with obsessive-compulsive disorder (OCD), yet little is known about the neurochemical changes related to these ...
Barsoum, Amir   +11 more
core   +2 more sources

Real-time Energy Management Strategy for Oil-Electric-Liquid Hybrid System based on Lowest Instantaneous Energy Consumption Cost

open access: yesEnergies, 2020
For the oil−electric−hydraulic hybrid power system, a logic threshold energy management strategy based on the optimal working curve is proposed, and the optimal working curve in each mode is determined.
Yang Yang   +4 more
doaj   +1 more source

Cosmological Fast Radio Bursts from Binary Neutron Star Mergers [PDF]

open access: yes, 2013
Fast radio bursts (FRBs) at cosmological distances have recently been discovered, whose duration is about milliseconds. We argue that the observed short duration is difficult to explain by giant flares of soft gamma-ray repeaters, though their event rate
Totani, Tomonori
core   +1 more source

An Automatic Emergency Braking Control Method for Improving Ride Comfort

open access: yesWorld Electric Vehicle Journal
The contribution of this paper is to present an automatic emergency braking (AEB) optimized algorithm based on time to collision (TTC) and a professional driver fitting (PDF) braking pattern.
Fei Lai, Junbo Liu, Yuanzhi Hu
doaj   +1 more source

Estimating vehicle braking distance over wet and rutted pavement surface through back-propagation neural network

open access: yesResults in Engineering
Due to repeated load cycles and climate impacts, road pavement deteriorates. One of the primary causes of pavement degradation is the formation of rutting under the wheel path on the road surface.
Jiaqi Jiang   +3 more
doaj   +1 more source

The Adaptive Transient Hough method for long-duration gravitational wave transients [PDF]

open access: yes, 2019
This paper describes a new semi-coherent method to search for transient gravitational waves of intermediate duration (hours to days). In order to search for newborn isolated neutron stars with their possibly very rapid spin-down, we model the frequency ...
Keitel, David   +2 more
core   +2 more sources

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