Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by:

Displaying 201 - 218 of 218

Mean Recurrence Intervals of Ultimate Wind Loads

July 1, 1998

Author(s)

Emil Simiu, A N. Heckert, T Whalen

The attention of wind engineers and extreme value climatologists has been focused in the last few decades on estimates of basic windspeeds, that is, wind speeds with 50 year or 100 year mean recurrence intervals (MRIs). Recently, however, efforts have been

Auditory Nerve Fiber Modeling: A Stochastic Melnikov Approach.

May 1, 1998

Author(s)

Marek Franaszek, Emil Simiu

Well-known experiments have established two basic features of auditory nerve fiber dynamics. First, harmonic excitation with constant amplitude produces mean firing rates that are largest for excitation frequencies contained in a relatively narrow best

Assessment of Wind Load Factors for Hurricane-Prone Regions.

January 1, 1998

Author(s)

Emil Simiu, T M. Whalen

We study the issue of whether the wind load factors specified in the ASCE 7-95 Standard for hurricane-prone regions on the one hand and extratropical storm regions on the other are mutually consistent with respect to risk. We consider structures or

Codification of Wind Loads on Buildings Using Bluff Body Aerodynamics and Climatological Data Bases.

January 1, 1997

Author(s)

Emil Simiu, T Stathopoulos

Current data storage and computational capabilities allow the development of a new generation of standards whose provisions on wind loads can be structured as knowledge-based systems drawing the requisite information from large data bases. We show several

Application of Chaotic Dynamics to Stochastic Resonance.

August 7, 1996

Author(s)

Marek Franaszek, Emil Simiu

For a class of systems with a periodic signal and noise, the improvement of the signal to noise ratio (SNR) achieved by increasing the noise intensity is referred to as stochastic resonance (SR). We show that, for a class of multistable systems, a chotic

Chaotic Behavior of Coastal Currents Due to Random Wind Forcing.

January 1, 1994

Author(s)

Emil Simiu

Recent analyses revealed that chaotic behavior is possible in a model of currents induced by wind over topography that slopes offshore and varies approximately periodically alongshore. These analyses were based on the assumption that the forcing by wind is

ASSESSMENT OF A METHOD FOR ESTIMATING PEAKS OF STATIONARY RANDOM PROCESSES BY USING EXTREME VALUE TYPE I DISTRIBUTIONS

Author(s)

Dat Duthinh, Dong Hun Yeo, Emil Simiu

The purpose of this note is to assess a method based on the Extreme Value Type I distribution currently employed in wind engineering practice to estimate stationary time series peaks. The note considers the interesting case of time series with Gaussian

Tall Building Response Parameters: Sensitivity Study Based on Orthogonal Factorial Experiment Design Techniques

Author(s)

James J. Filliben, Emil Simiu

This work has two objectives. The first objective is to introduce structural engineers to the experiment design technique, whose future applications may include, among others: the total response of tall buildings, and the nonlinear response to failure of

Wind Loading Codification in the Americas: Fundamentals for a Renewal

Author(s)

Emil Simiu

A survey of current wind engineering practices and their reflection in codes and standards reveals the existence of areas in which substantial progress needs to be made and are now possible. These areas belong to micrometerology, wind climatology