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Dive into the research topics where Sue O'Brien is active.

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Featured researches published by Sue O'Brien.


SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation | 1996

Effects of microgravity on ZBLAN optical fibers utilizing a sounding rocket

Dennis S. Tucker; Guy A. Smith; Gary L. Workman; Sue O'Brien

Samples of ZBLAN optical fiber were heated to the pulling and crystallization temperature in microgravity aboard a sounding rocket and on the ground at 1g. This was done in order to better understand the effects of gravity on the crystallization behavior of ZBLAN fibers. Samples heated in 1g at both temperatures crystallized. Samples heated to the crystallization temperature in microgravity were contaminated with water upon re-entry. Samples heated to the pulling temperature showed no evidence of crystallization in microgravity.


ieee systems conference | 2010

A methodology for mapping system engineering challenges to recommended approaches

Lucas Layman; Forrest Shull; Paul J. Componation; Sue O'Brien; Dawn Sabados; Anne Carrigy; Richard Turner

Our current research is focused on identifying system engineering approaches that address four key development challenges in a tightly constrained, rapid reaction environment: 1) changing and emerging requirements; 2) conflicting stakeholder priorities; 3) concurrent sustainment and development activities; and 4) integration of independently evolving components. We are building a concept map of the key elements that form a strategic bridge between development challenges and the specific methods, processes, and tools that successfully address those challenges. In this paper, we present our methodology for constructing a robust mapping that incorporates interviews, surveys, and rigorous analysis methods. We summarize the results from interviews with sponsor personnel, the results of a best practices survey of 116 professionals, and qualitative analysis of the survey responses.


Annals of the New York Academy of Sciences | 2002

Vapor Transport Growth of Organic Solids in Microgravity and Unit Gravity

Maria Ittu Zugrav; William E. Carswell; Glen Haulenbeek; Mohan Sanghadasa; Sue O'Brien; Bogdan Ghita; William E. Gathings

Abstract: Thin films of an organic nonlinear optical (NLO) material, N, N‐dimethyl‐p‐(2,2‐dicyanovinyl) aniline (DCVA), have been grown in space and on the ground by physical vapor transport in an effusive ampoule arrangement. The thin film growth technique developed on the ground is a direct result of information gleaned from experiments in microgravity. This paper covers the results of our experimental investigations for establishing “ideal” terrestrial conditions for deposition of a DCVA film. The active control during the deposition process was exercised by three deposition variables: the material source temperature, the background pressure external to the growth ampoule and the substrate temperature. Successful growth occurred when the difference in temperature between the source material and the copper substrate was 14°C and the background nitrogen pressure was such that the transport was either diffusive or convective. A qualitative diffusion limited boundary was estimated to occur at a pressure of approximately 20 torr. We have probed the DCVA thin films with visible‐near infrared reflection absorption spectroscopy, polarized Fourier transform infrared spectrometry, differential interference contrast optical microscopy, and stylus profilometry.


Archive | 1995

ZBLAN Microgravity Study

Gary L. Workman; Guy A. Smith; Sue O'Brien; Leonard Adcock


Archive | 2011

Verification, Validation and Accreditation using AADL

Sue O'Brien; Russell S. Peak; Philip Alldredge; Lance Warden; Julie Fortune; Selcuk Cimtalay; Andrew Scott; Miyako Wilson; Brian Aikens; Drew Martin


Archive | 2011

Verification, Validation and Accreditation

Sue O'Brien; Russell S. Peak; Philip Alldredge; Lance Warden; Julie Fortune; Selcuk Cimtalay; Andrew Scott; Miyako Wilson; Brian Aikens; Drew Martin


Archive | 2010

Modular Reconfigurable Architecture for Tailored Rapid SE Artifact

Stas Tarchalski; Sue O'Brien; Dawn Sabados; Julie Fortune; Phillip Alldredge; Lance Warden


Archive | 2010

RT2 Modular Documents: A/Stevens/Modular Reconfigurable Architecture for Tailored Rapid SE Artifact ...

Stas Tarchalski; Sue O'Brien; Dawn Sabados; Julie Fortune; Phillip Alldredge; Lance Warden


Archive | 2009

Evaluation of Systems Engineering Methods, Processes and Tools on Department of Defense and Intelligence Community Programs. Phase 1

Richard Turner; Forrest Shull; Barry W. Boehm; Anne Carrigy; Lori A. Clarke; Paul J. Componation; Cihan H. Dagli; Jo Ann Lane; Lucas Layman; Ann Miller; Sue O'Brien; Leon J. Osterweil; Dawn Sabados; Sandy Wise


2001 Conference and Exhibit on International Space Station Utilization | 2001

Space Station facilities for processing optical materials

Sue O'Brien; William E. Gathings; Gary L. Workman; Benoit Domercq; Bernard Kippelen

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Dawn Sabados

University of Alabama in Huntsville

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Gary L. Workman

University of Alabama in Huntsville

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Guy A. Smith

University of Alabama in Huntsville

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Anne Carrigy

Stevens Institute of Technology

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Leonard Adcock

University of Alabama in Huntsville

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Lucas Layman

North Carolina State University

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Miyako Wilson

Georgia Institute of Technology

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Paul J. Componation

University of Alabama in Huntsville

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Richard Turner

Stevens Institute of Technology

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