Physical Sciences and Mathematics Commons^™

Microanalytical Investigations Of Gold-Bearing Rocks From The An Najadi Region In Saudi Arabia, Nazrul I. Khandaker, M. Ahmed, M. M. Hariri, M. A. Garwan, K. R. Khan, M. M. Al-Ohali

Publications and Research

The Proton Induced X-ray Emission technique with a scanning microbeam (micro-PIXE) and Scanning Electron Microscopy (SEM) were employed to study gold-bearing rocks from the An Najadi and adjacent regions situated within the exposed northeastern part of the Arabian Shield. These microanalytical investigations, together with routine petrological and ore microscopic studies, demonstrated the presence of important partitioning of major minerals and trace elements in several samples. These measurements also revealed microstructural features including brecciation within quartz grains and metal concentrations within these fracture-controlled micro-conduits. Results showed promise in terms of using distinctive geochemical signatures for ore body recognition. Of particular interest …

Edward Augustus Bowers, John A. Drobnicki

Publications and Research

Edward Augustus Bowers was a lawyer, government employee, and conservationist whose work in government service brought about the creation of national forests that would be managed in the public interest.

Charles Hugh Callison, John A. Drobnicki

Publications and Research

Charles Hugh Callison helped turn the National Audubon Society into a significant wildlife advocacy organization.

Karl Patterson Schmidt, John A. Drobnicki

Publications and Research

Karl Patterson Schmidt turned herpetology firom a hobby into a branch of biology, and influenced numerous young biologists as an editor, teacher, author, and curator.

Merritt Lyndon Fernald, John A. Drobnicki

Publications and Research

Merritt Lyndon Fernald trained the future leaders in taxonomy and descriptive botany and helped maintain a high level in botanical writing through his work as editor of Rhodora.

Thomas Mayo Brewer, John A. Drobnicki

Publications and Research

Thomas Mayo Brewer was an ornithologist, oologist, and publisher whose work was concerned with eggshells as well as the breeding habits, life histories, and geographical distribution of birds.

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Global Attractors From The Explosion Of Singular Cycles, Carlos Arnoldo Morales, Maria José Pacífico, Enrique Ramiro Pujals

Publications and Research

Abstract:

In this paper we announce recent results on the existence and bifurcations of hyperbolic systems leading to non-hyperbolic global attractors.

Résumé:

Nous présentons dans cette Note des résultats récents concernant l’existence et les bifurcations d’un nouvel attracteur global chaotique.