Results 31 to 40 of about 1,716,694 (368)

Is the super-Penrose process possible near black holes? [PDF]

open access: yes, 2016
We consider collisions of particles near generic axially symmetric extremal black holes. We examine possibility of indefinitely large extraction of energy (the so-called super-Penrose process) in the limit when the point of collision approaches the ...
Zaslavskii, O. B.
core   +3 more sources

Simulation-based forecasting effects of an accidental explosion on the road. Part II: Case study [PDF]

open access: yesTransport, 2006
The paper contains a case study covering forecasting mechanical effects of an explosion which can be generated during a road accident. It illustrates a practical application of the simulation-based procedure developed for such forecasting in the first ...
E. R. Vaidogas
doaj   +3 more sources

High‐resolution seismic tomography of the 2015 Mw7.8 Gorkha earthquake, Nepal: Evidence for the crustal tearing of the Himalayan rift

open access: yesGeophysical Research Letters, 2016
The Mw7.8 Gorkha earthquake struck Nepal and ruptured the boundary between the Indian and Eurasian plates. We conducted 2‐D Pg wave tomography to clarify the seismogenic structure and try to understand causal mechanisms for this large earthquake, using ...
Shunping Pei   +4 more
doaj   +1 more source

Analysis and Treatment of Vibration Fault of a 1 050 MW Steam Turbine Generating Unit

open access: yesZhejiang dianli, 2022
During the capital construction commissioning of unit No.1 of a 2×1 050 MW coal-fired power plant, vibration of bearings No.5 and No.6 exceeded the set standard and become rather unstable, holding up the project.
LI Weijun   +6 more
doaj   +1 more source

Quarkonium Production in PHENIX [PDF]

open access: yes, 2007
Quarkonia provide a sensitive probe of the properties of the hot dense medium created in high energy heavy ion collisions. Hard scattering processes result in the production of heavy quark pairs that interact with the collision medium during ...
Abigail Bickley   +15 more
core   +2 more sources

Time-Varying Formation Control for Second-Order Discrete-Time Multi-Agent Systems With Directed Topology and Communication Delay

open access: yesIEEE Access, 2019
Time-varying formation control protocol design and analysis problems for the second-order discrete-time multi-agent systems with directed interaction topology and communication delay are investigated.
Lyulong He   +4 more
doaj   +1 more source

Advective collisions [PDF]

open access: yesEurophysics Letters (EPL), 2007
Small particles advected in a fluid can collide (and therefore aggregate) due to the stretching or shearing of fluid elements. This effect is usually discussed in terms of a theory due to Saffman and Turner [J. Fluid Mech., 1, 16-30, (1956)]. We show that in complex or random flows the Saffman-Turner theory for the collision rate describes only an ...
Michael Wilkinson   +3 more
openaire   +2 more sources

Chance-Constrained Collision Avoidance for MAVs in Dynamic Environments

open access: yesIEEE Robotics and Automation Letters, 2019
Safe autonomous navigation of microair vehicles in cluttered dynamic environments is challenging due to the uncertainties arising from robot localization, sensing, and motion disturbances.
Hai Zhu, Javier Alonso-Mora
semanticscholar   +1 more source

Redundant neural vision systems: competing for collision recognition roles [PDF]

open access: yes, 2013
Ability to detect collisions is vital for future robots that interact with humans in complex visual environments. Lobula giant movement detectors (LGMD) and directional selective neurons (DSNs) are two types of identified neurons found in the visual ...
Rind, F. Claire, Yue, Shigang
core   +1 more source

Colliding Impulsive Gravitational Waves and a Cosmological Constant [PDF]

open access: yes, 2015
We present a space--time model of the collision of two homogeneous, plane impulsive gravitational waves (each having a delta function profile) propagating in a vacuum before collision and for which the post collision space--time has constant curvature ...
Barrabès, C., Hogan, P. A.
core   +3 more sources

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