| Spatial Mechanical Response and Strain Gradient Evolution of Friction Stir Welded Aluminum-2139 |
Feb 2012 |
30 pages |
| Authors:
Brian Justusson; Jessica Medintz; Jian Yu; Constantine Fountzoulas; Chian-Fong Yen; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
 | With current involvements of the U.S. Military in various peace-keeping and combat operations throughout the world, there is an increase in the deployment of armored military vehicles. Traditional armoring techniques have performed well against particular threats, but, in the recent combat operations, a new threat of improvised explosive devices, the vulnerability of the undercarriage, is being exposed. While thick, steel-structural members have been used in the past, an effort to ... |
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| Through-Thickness Property Measurement of Three-Dimensional Textile Composites |
Apr-2009 |
22 pages |
| Authors:
Ryan L Karkkainen; Paul Moy; Jerome T Tzeng; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| Three-dimensional (3-D) reinforcement of thick composite parts is utilized to increase delamination resistance and through-thickness properties, which often represent the weak link of such structures. Stitching, z-pinning, or a 3-D textile weave may be employed. In the current study of a 3-D, orthogonal-woven, glass-epoxy composite, a specimen is designed for cases in which a sufficiently thick specimen for standard test setups cannot be created due to manufacturing limitations. A minimum ... |
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| Electrical Exploding Nickel and Tungsten Wires in Air and Water |
Feb-2009 |
22 pages |
| Authors:
George B Vunni; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| Nickel wire of diameter d = 230 microns and tungsten wire of diameter d = 150 microns were exploded in air and water. Plasmas were formed by rapid electrical discharge through thin wires in air and immersed in a water bath. Energy deposited into the wires at different stages of heating in air and water was estimated from the experiments. It was shown that 30% more energy was deposited in ... |
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| Storytelling as an Instructional Method: Descriptions and Research Questions |
Jan 2009 |
19 pages |
| Authors:
Dee H Andrews; Thomas D Hull; Jennifer A Donahue; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| This paper discusses the theoretical and empirical foundations of the use of storytelling in instruction. The definition of story is provided, and four instructional methods related to storytelling are identified: case-based instruction, narrative-based instruction, scenario-based instruction, and problem-based instruction. The article describes each of the four instructional methods and provides an example of the method within an instructional setting; identifies research foundations and relevant theoretical literature; and proposes research questions ... |
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| An Analysis of Vertebral Stress and BMD During +Gz Impact Accelerations |
APR 2007 |
114 pages |
| Authors:
Hilary L. Gallagher; John R. Buhrman; Chris E. Perry; Stephen E. Mosher; Delano D. Wilson; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| The U.S. Air Force pilot population includes both males and females with an expanded range of anthropometric measurements. To address concerns that females and/or small and large individuals may be more at risk during ejections, a series of tests were conducted at the Air Force Research Laboratory (AFRL) to identify the effects of gender and size on vertebral stress and BMD. Twenty-two males and twenty-four females were tested at acceleration ... |
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| Occupational Jet Fuel Exposure and Invasive Cancer Occurrence in the United States Air Force, 1989-2003 |
JAN 2007 |
17 pages |
| Authors:
Tiffany A. D'Mello; Grover K. Yamane; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| To measure the association between occupational jet fuel exposure and invasive cancer occurrence in the U.S. Air Force (USAF). Cancer data from January 1, 1989 to December 31, 2003 were extracted from a U.S. military cancer registry and linked to information from the Air Force Personnel Center. Based on job descriptions, et fuel exposure was categorized as high, moderate or low. Conditional logistic regressions were used to calculate odds ratios ... |
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| Descriptive Analysis of Air Force Non-Fatal Suicide Events |
JUL 2006 |
13 pages |
| Authors:
Tiffany A. D'Mello; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| As a component of the Air Force Suicide Prevention Program, the Suicide Event Surveillance System (SESS) was developed in response to a peak in 1994 in the number of Active Duty Air Force (ADAF) suicides (16.4 per 100,000). The Suicide Event Surveillance System serves as the primary suicide event surveillance mechanism and is used to track all fatal and non-fatal suicide events (NFSE) that occur among Active Duty Air Force ... |
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| Case Series Investigation of Amyotrophic Lateral Sclerosis (ALS) Among Former Kelly Air Force Base Workers |
APR 2005 |
156 pages |
| Authors:
Brooke L. Wackerman; B. L. Cox; K. L. Grayson; Shari L. Shanklin; Wilson W. McGriff; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| Concerns over a possible cluster of amyotrophic lateral sclerosis (ALS) among former workers at Kelly Air Force Base - (Kelly AFB) prompted a series of scientific investigations. In an attempt to gain insight into the occupational, environmental and lifestyle exposure histories of persons with ALS (PALS), the ALS Association-South Texas Chapter and the Air Force Institute for Operational Health (AFIOH, formerly the Air Force Institute for Environment, Safety, and Occupational ... |
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| Development of an Objective Method of Respiratory Protective Mask Lens Fogging: Data Acquisition and Image Processing Proof of Concept |
AUG 2003 |
17 pages |
| Authors:
David M. Caretti; Karen M. Coyne; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| A method that objectively related video image gray scale characteristics to Snellen visual acuity was conceptualized, developed, and evaluated in this investigation as a first step towards development of an objective measure of respirator lens fogging. Seven image processing techniques, including region of interest selection, image filtering, thresholding, removal of border objects, removal of small objects, filling of image holes, and particle detection were applied to images captured on-line with ... |
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| Implementation of the Nonlinear Composite Analysis Code "LAMPAT" into LLNL-DYNA3D |
SEP 2002 |
60 pages |
| Authors:
Ala Tabiei; George A. Gazonas; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| The nonlinear composite analysis code "LAMPAT" is implemented in the nonlinear explicit finite element code LLNL-DYNA3D as a new user-defined material model. All subroutines of LAMPAT are implemented as user-defined Material Model 46. The user-defined material subroutine calls an external data base file that contains material properties for several composites. In addition, LAMPAT is modified for use in an explicit time-integration solver. The model is improved to account for loss ... |
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| Assessment of Composite Hazards at Crash Sites: Industrial Hygiene Field Guidance for Bioenvironmental Engineers |
AUG 2001 |
32 pages |
| Authors:
Melissa Hinojosa; Joseph Costantino; James J. Jarbeau Jr.; Tammy J. Hintz; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| Advanced composite material (ACM) use in the military and private sector is increasing. As a result, the personnel responding to a crash site should be able to assess the hazard and determine a category of high or low exposure risk. This assessment will take into consideration: visual assessment, duration and location of fire, physical damage, aircraft type/quantity of composite material, terrain and environmental conditions, phase of recovery and type of ... |
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| Investigation of an Outbreak of Acute Febrile Respiratory Illness Among Recruits at Lackland Air Force Base, TX |
JUL 2001 |
87 pages |
| Authors:
Michelle R. Torok; Jessia A. Benevento; Inga R. Heemink; James S. Neville; Katerina M. Neuhauser; OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| A large sustained outbreak of febrile respiratory illness (FRI) began in the Fall of 1999 among basic trainees at Lackland Air Force Base, Texas. Adenovirus was quickly identified as the predominant etiologic pathogen; every isolate typed was found to be type 4. Although the use of the oral adenovirus vaccine had been discontinued at Lackland AFB in 1989, this report documents the first outbreak among Air Force trainees since before ... |
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| How to Overcome Information Anxiety: Assignment and Use of DoD distribution Statements for Technical Documents. Volume 2. Participant Manual |
MAY 1998 |
298 pages |
| Authors:
OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| This course on DoD distribution statements is in two volumes. The Participant Guide contains a set of the instructor's slides and reference materials. The course is intended to offer DoD staff and contractors a basic understanding of the rationale and mechanics of properly assigning distribution statements to DoD technical documents. While other markings are applied to DoD technical documents, this course only covers distribution statements. ... |
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| How to Overcome Information Anxiety: Assignment and Use of DoD distribution Statements for Technical Documents. Volume 1. Facilitor Guide |
MAY 1998 |
445 pages |
| Authors:
OAK RIDGE INST FOR SCIENCE AND EDUCATION TN
|
| This course on DoD distribution statements is in two volumes. The Facilitator Guide is the training resource for DoD personnel, such as Scientific and Technical Information (STINFO) Managers, who will be conducting this course on DoD distribution statements. It contains facilitator notes for each of the four modules, copies of transparencies, and reference materials including tips to help prepare for and conduct the training. The course ... |
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