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Return Velocities Induced by Shallow-Draft Navigation
Return velocities are caused by the displacement effects of vessels as they travel in navigation channels. Numerous return velocity equations have been developed for relatively small channels...

Turbulence and Reynolds Stress Distribution in a Natural River
Turbulence characteristics of ambient flow velocities and their comparison with those generated by the movement of barge traffic within the channel border area in a navigation waterway...

Uncertainty Quantification in Water Distribution Parameter Estimation
Calibration for water distribution system model parameters is usually undertaken with a minimal amount of field measurements so additional pseudomeasurements are assumed. Both the actual...

Integration of Cost and Schedule Control
This paper presents cost control and schedule control relationships in an integrated manner for an activity/cost account that has a single output scheduled to be produced in a linear,...

Properties of Small-Scale Waves in Sheared Gas-Liquid Flows
Small wind-generated waves are examined theoretically and experimentally in a small laboratory flow system, at conditions close to neutral stability in an attempt to better characterize...

Measurement of Wave-Induced Turbulent Flow Structures Using Digital Image Sequence Analysis
The turbulent flow in water close to the wavy wind-stressed water surface has been examined quantitatively in a large circular wind-water tunnel with a flow visualization method using...

Wavelets and Air-Sea Transfer
Newly acquired insight into the mechanism of air-sea momentum transfer has also resolved some long-standing questions on air-sea transfer of gases of low diffusivity. Sharp-crested wavelets...

New Experimental Results on the Parameters Influencing Air-Sea Gas Exchange
Gas exchange experiments from large linear and circular facilities are presented which provide some more insight into the influence of waves on the gas exchange process. The experimental...

Stereo Vision Onboard a Vehicle for Obstacle Detection
We show how two linear cameras, mounted behind the windscreen of a car, can be used to detect the obstacles on the road in real time, even with small computer architectures. Results of...

Application of Control Theory to Regulate Traffic Flow on Periurban Ringways
Two on-ramp metering strategies are compared by a simulation study for the Boulevard Peripherique in Paris. The first one is a local strategy, based on linear feedback control theory....

Identification of Critical Load Distributions for Wind Loading
For practical application as well as for sophisticated investigations, the time dependent stochastic wind process has to be simplified in terms of input data to the calculation. Usually,...

Tension Leg Platform Response to Drag Forces by Equivalent Stochastic Quadratization
An equivalent stochastic 'quadratization' method is described for performing nonlinear stochastic response analyses of offshore platforms subject to wave and...

Largest and Characteristic Earthquakes in the U.S. East of the Rocky Mountains
A new statistical procedure is proposed for the estimation of maximum earthquake magnitude M in intraplate regions. Starting from a historical catalog of events and a seismotectonic classification...

Mean Square Stability of Linear Gyroscopic Systems Under Combined Harmonic and Stochastic Excitations
This paper examines the mean square stability of linear gyroscopic systems under both harmonic and stochastic parametric excitations. The intensities of both excitations and correlation...

A Comparison of Different Mathematical Models for the Spatial Correlation of Distributed Excitation Forces
This paper contains an investigation of the transverse vibrations of EULER-BERNOULLI beams under longitudinal tension and random space-time loading. Using GREEN's function...

Detection of System Nonlinearity
A method for detection of linear/nonlinear characteristics of mechanical systems excited by stationary Gaussian processes is presented. Linear systems under consideration show always a...

Identification of Power Spectra?Linear and Nonlinear Approaches
Linear dynamical filter systems driven by white noise can be used for the generation of stationary and Gaussian processes. A linear approximation method proposed by W. Wedig is presented...

Stochastic Propagation of Semi-Elliptical Surface Cracks
Random propagation of a semi-elliptical surface crack is investigated as a bivariate stochastic process. Under a few assumptions, a probability distribution of the surface crack propagation...

Distribution of Variance of Fatigue Lives of Ferrous Metals by the Analysis of Fatigue Strength Database
The purpose of this study is to determine the distribution characteristics of variance of fatigue lives of carbon and alloy steels, especially from the viewpoint of their dependence on...

The Effects of Thermal Variation in Fracture Toughness
Environmental temperature changes produce cyclic and thermal stresses in cylindrical structures. The probability of failure defined as the chance that a crack, growing under the influence...

 

 

 

 

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