Results 81 to 90 of about 68,552 (195)

The Impact of Privatisation on the Efficiency of Train Operation in Britain [PDF]

Twenty-five train operating companies (TOCs) were created between 1994-1997, as part of the restructuring process of the railway industry in Great Britain.
Alvaro Angeriz, Luisa Affuso, Michael Pollitt   +2 more
core  

Conditional beta pricing models: A nonparametric approach [PDF]

We propose a two-stage procedure to estimate conditional beta pricing models that allow for flexibility in the dynamics of assets' covariances with risk factors and market prices of risk (MPR).
Ferreira García, María Eva, Gil Bazo, Javier, Orbe Mandaluniz, Susan   +2 more
core  

Parametric Roll Instability of Ships

, 2008
Parametric roll may be defined as the spontaneous rolling motion of the ship moving in head or following seas that comes about as a result of the dynamic instability of motion. The development of the parametric roll occurs under the conditions that the encounter angular frequency is approximately twice the roll angular frequency, the wavelength is equal
openaire   +1 more source

Nonlinear Observers for Parametric Roll

, 2012
Parametric roll resonance is a dangerous resonance phenomenon affecting several kinds of ships, such as cruise ships, fishing vessels and container ships. In a worst case scenario parametric roll resonance may lead to roll angles of up to 50 degrees, capsizing of the vessel, or damage of goods and ship for tens of millions of dollars, citep ...
openaire   +1 more source

Parametrically Excited Vibration in Rolling Element Bearings

, 2014
A defect-free rolling element bearing has a varying stiffness. The variation of stiffness depends on number of rolling elements, their configuration and cage frequency. The time-varying characteristics of the stiffness results in a parametric excitation. This may lead to instability which is manifested as high vibration levels.
Ramagiri, S, Sarkar, A, Sekhar, AS
openaire   +1 more source

Inspection of stability of a general roll-damping of a ship via non-perturbative approach. [PDF]

Sci Rep
Moatimid GM, Mohamed MAA, Abohamer MK.
europepmc   +1 more source

Transient Contact Elastic-Plastic Characteristics Analysis of Rail Welded Joints in Heavy-Haul Railways. [PDF]

Materials (Basel)
Liu C, Wang Z.
europepmc   +1 more source

Evaluation of vulnerability to parametric rolling

, 2016
This is a Master of Science thesis in Naval Architecture (course code SD271X). It was conducted at KTH Centre for Naval Architecture in collaboration with Wallenius Marine. The main objective of this master thesis project have been to evaluate the vulnerability for parametric rolling for 3 generations of Pure Car/Truck Carriers (PCTC's) from the ...
openaire   +1 more source

Low-Load endoluminal navigation with a magnetically actuated medical soft microrobot. [PDF]

Front Med Technol
Guerra J, Malchikov A, Jatsun S, Ryapolov P, Martinez-Leon AS.   +4 more
europepmc   +1 more source

Ensemble and temporal feature-based framework for rainfall classification in Bangladesh. [PDF]

PLoS One
Tamim MS, Alim MS, Khan TA, Rahman M, Anwar MM.   +4 more
europepmc   +1 more source