Results 81 to 90 of about 5,064,878 (211)

Delta High P.T.A. Officers

open access: yes, 1963
Left to Right: Harriet Eliason - President, Merlene Callister - Vice President, and Lorna Bunker - Secretary/Treasurer.

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An Examination of the Reasons for, and Variability of, the Differences Between Response Spectra and Pseudo Response Spectra

open access: yesEarthquake Spectra, Volume 42, Issue 4, November 2026.
For many decades, it has been common practice to overlook the differences between response spectra and pseudo response spectra. This practice stems from analyses indicating that the average difference between response spectra and pseudo response spectra is negligible for a viscous damping ratio of 5%, which is near‐universally adopted.
Eric M. Thompson, David M. Boore
wiley   +1 more source

Delta High P.T.A. Officers

open access: yes, 1965
Left to Right: Mrs. Ronald Wright-Secretary, Mrs. Robert Clark-President, Mrs. Dorcey Sabey-Vice President being presented the P.T.A. duties by Mrs.

core   +1 more source

Threshold Asymmetric Conditional Autoregressive Range (TACARR) Model

open access: yesJournal of Forecasting, Volume 45, Issue 7, Page 3298-3326, November 2026.
ABSTRACT This paper introduces a Threshold Asymmetric Conditional Autoregressive Range (TACARR) model for analyzing the daily price ranges of financial assets. The proposed formulation assumes that the conditional expected range switches between two regimes, representing upward and downward market states, with the disturbance distribution also allowed ...
Isuru Ratnayake, V. A. Samaranayake
wiley   +1 more source

Enhancing Groundwater Contaminant Transport Forecasts Through Synergy of Machine Learning and Physics‐Based Models

open access: yesWater Resources Research, Volume 62, Issue 11, November 2026.
Abstract Groundwater is vital for water supply, irrigation, and environmental sustainability, yet contamination remains a global challenge. Remediation of contaminated aquifers is hindered by difficulties in tracking contaminant spread and identifying pollutant sources.
Maria Grazia Zanoni   +3 more
wiley   +1 more source

Non‐Central Wishart Random Matrices in Structural Dynamics: A Modal‐Basis Approach

open access: yesInternational Journal for Numerical Methods in Engineering, Volume 127, Issue 20, 30 October 2026.
ABSTRACT This article develops a non‐parametric stochastic computational model for linear structural dynamics based on a reduced non‐central Wishart (NCW) random matrix formulation. The objective is to represent uncertainty in the mass and stiffness matrices while preserving the matrix properties required for modal and frequency‐domain analysis ...
Alan Das Mannoosseril   +2 more
wiley   +1 more source

Shipborne Measurements of Mineral Dust and Black Carbon Aerosols Over the Southern Ocean in the Austral Summer

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 20, 28 October 2026.
Abstract Atmospheric mineral dust and black carbon (BC) aerosols play important roles in the Earth's climate system, yet direct observations over the Southern Ocean (SO) are scarce. In this study, we present the characteristics of airborne water‐insoluble particles (WIPs) collected during a cruise of the R/V Shirase in the Australian and Indian sectors
A. Yoshida   +5 more
wiley   +1 more source

Global Multi‐Model Eddy Dissipation Rate Probability Density Functions for Clear‐Air Turbulence Under Climate Change

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 20, 28 October 2026.
Abstract Atmospheric turbulence poses a major risk to aviation, and it is expected to intensify as a response to climate change. The probability density functions (PDFs) of dozens of different clear‐air turbulence (CAT) diagnostics have been found to shift to higher values in response to climate change, consistent with strengthened vertical wind shear ...
Joana de Medeiros, Paul D. Williams
wiley   +1 more source

Delta High P.T.A. Officers

open access: yes, 1967
Left to right: Phylis Anderson - President, Kay M. Bassett - Director, Lola Burraston - Vice President, and LaRae Peterson - Secretarty.

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