Search

Your search keyword '"Yeager J"' showing total 514 results
Start Over Author "Yeager J"
514 results on '"Yeager J"'

1. Gas gun shock experiments with single-pulse x-ray phase contrast imaging and diffraction at the Advanced Photon Source

Author

Luo, S. N., Jensen, B. J., Hooks, D. E., Fezzaa, K., Ramos, K. J., Yeager, J. D., Kwiatkowski, K., and Shimada, T.

Subjects
Condensed Matter - Other Condensed Matter, Physics - Instrumentation and Detectors
Abstract

The highly transient nature of shock loading and pronounced microstructure effects on dynamic materials response call for {\it in situ}, temporally and spatially resolved, x-ray-based diagnostics. Third-generation synchrotron x-ray sources are advantageous for x-ray phase contrast imaging (PCI) and diffraction under dynamic loading, due to their high photon energy, high photon fluxes, high coherency, and high pulse repetition rates. The feasibility of bulk-scale gas gun shock experiments with dynamic x-ray PCI and diffraction measurements was investigated at the beamline 32ID-B of the Advanced Photon Source. The x-ray beam characteristics, experimental setup, x-ray diagnostics, and static and dynamic test results are described. We demonstrate ultrafast, multiframe, single-pulse PCI measurements with unprecedented temporal ($<$100 ps) and spatial ($\sim$2 $\mu$m) resolutions for bulk-scale shock experiments, as well as single-pulse dynamic Laue diffraction. The results not only substantiate the potential of synchrotron-based experiments for addressing a variety of shock physics problems, but also allow us to identify the technical challenges related to image detection, x-ray source, and dynamic loading.

Published
2012
Full Text
View/download PDF

2. Confidentiality of Student Records: A Guide for School Districts Establishing Policies and Procedures with Special Emphasis on Alcohol and Other Drug Use.

Author

Western Regional Center for Drug-Free Schools and Communities, Portland, OR., Northwest Regional Educational Lab., Portland, OR., and Yeager, J. David

Abstract

This document sets out the requirements of federal law pertaining to confidentiality of student records. It provides guidance for the development of school-district policies on the handling of student records and provides a framework for legal information sharing. The paper discusses in detail each of the major federal statutes and its requirements: (1) the Family Educational Rights and Privacy Act of 1974 (FERPA); (2) the Grassley Amendment to the Goals 2000: Educate America Act; (3) 42 U.S.C. Section 290dd-2 (1994); and (4) the Education of the Handicapped Act. A review of the laws' requirements concludes that, first, each school district should develop and implement clearly stated policies and procedures regarding student records. Second, school districts should fully inform parents and eligible students of their rights, including their right of access to student records and educational materials. Parents and students should also be apprised of situations in which information can be gathered and disclosed without their consent. Finally, school districts should examine applicable state laws. Answers to frequently asked questions are also included. Appendices summarize the provisions of each federal statute and list applicable state laws. (LMI)

Published
1994

3. Multiscale investigation of the microstructural mechanisms driving ratchet growth in PBX 9502.

Author

Yeager, J. D., Montanari, D., Woznick, C., Knepper, R., and Bennett, K. C.

Subjects
*HIGH resolution electron microscopy, *RATCHETS, *HIGH resolution imaging
Abstract

The high explosive PBX 9502 undergoes irreversible expansion during thermal cycling ("ratchet growth"). Recent innovations in thermomechanical modeling via homogenization strategies are beginning to incorporate mesoscale information such as grain size, total porosity, and spatial distribution of voids and cracks. To generate a complete experimental data set to challenge and inform these models, PBX 9502 pellets were thermally cycled, cross-sectioned using ion polishing, and imaged in high resolution with scanning electron microscopy. Ratchet growth was found to drive expansion through microcracking. Microcracks were affected by agglomeration of crystals within the PBX. Virgin material showed greater ratchet growth than recycled material. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

5. The evolution and ecology of multiple antipredator defences

Author

Kikuchi DW, Allen WL, Arbuckle K, Aubier TG, Briolat ES, Burdfield-Steel ER, Cheney KL, Dankova K, Elias M, Hamalainen L, Herberstein ME, Hossie TJ, Joron M, Kunte K, Leavell BC, Lindstedt C, Lorioux-Chevalier U, McClure M, McLellan CF, Medina I, Nawge V, Paez E, Pal A, Pekar S, Penacchio O, Raska J, Reader T, Rojas B, Ronka KH, Rossler DC, Rowe C, Rowland HM, Roy A, Schaal KA, Sherratt TN, Skelhorn J, Smart HR, Stankowich T, Stefan AM, Summers K, Taylor CH, Thorogood R, Umbers K, Winters AE, Yeager J, Exnerova A

Published
2023
Full Text
View/download PDF

8. The Relationship of Educational, Economic and Social Characteristics to the Degree of Desegregation in the Public Schools of Kentucky.

Author

Western Kentucky Univ., Bowling Green. and Yeager, J. Frank

Abstract

The relationship of selected educational, economic, and social characteristics to the degree of voluntary desegregation was determined in an effort to examine social climate and its role in creating a setting for desegregation in the public schools of Kentucky from the time of the Brown Decision of 1954 to the enactment of the Civil Rights Act of 1964. The Pearson Product-Moment Coefficient of Correlation procedure was used in the analysis of data gathered from census tapes; material prepared by the Kentucky State Department of Public Instruction was employed to calculate the degree of voluntary desegregation. The findings indicated the importance of 4 factors: (1) proportion of the population that was Negro; (2) rurality of the district; (3) the occupational distribution within the Negro community; and (4) the number of employed who work outside the county of residence. It was recommended that the relationship of financial support to percent of non-white public school students, and the importance of the variable of number employed who work outside the county of residence, be further investigated. (SW)

Published
1968

18. Jet formation in cerium metal to examine material strength.

Author

Jensen, B. J., Cherne, F. J., Prime, M. B., Fezzaa, K., Iverson, A. J., Carlson, C. A., Yeager, J. D., Ramos, K. J., Hooks, D. E., Cooley, J. C., and Dimonte, G.

Subjects
CERIUM group, EQUATIONS of state, PRESSURE drop (Fluid dynamics), BUYS-Ballot's laws, THERMODYNAMIC state variables
Abstract

Examining the evolution of material properties at extreme conditions advances our understanding of numerous high-pressure phenomena from natural events like meteorite impacts to general solid mechanics and fluid flow behavior. Recent advances in synchrotron diagnostics coupled with dynamic compression platforms have introduced new possibilities for examining in-situ, spatially resolved material response with nanosecond time resolution. In this work, we examined jet formation from a Richtmyer-Meshkov instability in cerium initially shocked into a transient, high-pressure phase, and then released to a low-pressure, higher-temperature state. Cerium's rich phase diagram allows us to study the yield stress following a shock induced solid-solid phase transition. X-ray imaging was used to obtain images of jet formation and evolution with 2-3 μm spatial resolution. From these images, an analytic method was used to estimate the post-shock yield stress, and these results were compared to continuum calculations that incorporated an experimentally validated equation-of-state (EOS) for cerium coupled with a deviatoric strength model. Reasonable agreement was observed between the calculations and the data illustrating the sensitivity of jet formation on the yield stress values. The data and analysis shown here provide insight into material strength during dynamic loading which is expected to aid in the development of strength aware multi-phase EOS required to predict the response of matter at extreme conditions. [ABSTRACT FROM AUTHOR]

Published
2015
Full Text
View/download PDF

26. De Novo SOX4 Variants Cause a Neurodevelopmental Disease Associated with Mild Dysmorphism

Author

Zawerton, Ash, primary, Yao, Baojin, additional, Yeager, J. Paige, additional, Pippucci, Tommaso, additional, Haseeb, Abdul, additional, Smith, Joshua D., additional, Wischmann, Lisa, additional, Kühl, Susanne J., additional, Dean, John C.S., additional, Pilz, Daniela T., additional, Holder, Susan E., additional, McNeill, Alisdair, additional, Graziano, Claudio, additional, and Lefebvre, Véronique, additional

Published
2019
Full Text
View/download PDF

31. Letters

Author

Seibert, Dave, Blady, Walter, Hecht, Gernot P.W., Klein, Simon L., Ordway, Alan, Jameson, Colin, Keeler, Hal W., Corman, Mary, Smith, Donald A., White, Sam, Ward, Sean, Miller, Phil, Koblosh, Daniel A., Yeager, J. Michael, Gosnell, Jason, Ringers, Joseph, and Elemans, John

Abstract

LETTERS A Retouch of Evil Ken Milburn's roundup of color image-retouching applications ('What a Color-Retouching Program Can Do for You,' October '90, page 172) was technically informative, but I find […]

Published
1991

35. Nanoindentation of compliant substrate systems: effects of geometry and compliance

Author

Nguyen, Thao D., Yeager, J. D., Bahr, D. F., Adams, D. P., and Moody, N. R.

Subjects
Elasticity -- Analysis, Finite element method -- Usage, Dielectric films -- Mechanical properties, Dielectric films -- Electric properties, Thin films -- Mechanical properties, Thin films -- Electric properties, Science and technology
Published
2010

37. Quantification of regional aerosol deposition patterns as a function of aerodynamic particle size in rhesus macaques using PET/CT imaging

Author

Dabisch, P. A., primary, Xu, Z., additional, Boydston, J. A., additional, Solomon, J., additional, Bohannon, J. K., additional, Yeager, J. J., additional, Taylor, J. R., additional, Reeder, R. J., additional, Sayre, P., additional, Seidel, J., additional, Mollura, D. J., additional, Hevey, M. C., additional, Jahrling, P. B., additional, and Lackemeyer, M. G., additional

Published
2017
Full Text
View/download PDF

38. Micrococcusfolliculitis in HIV-1 disease

Author

K.J. Smith, H. Skelton, Yeager J, and Ronald C. Neafie

Subjects
Micrococcaceae, Opportunistic infection, Micrococcus, Folliculitis, Dermatology, Biology, medicine.disease, biology.organism_classification, Microbiology, Sepsis, Nitrofurantoin, medicine, Viral disease, Coagulase, medicine.drug
Abstract

Organisms with little pathogenic potential in immunocompetent hosts may produce disease in HIV-1 + patients. We describe three HIV-1 + patients in late disease who presented with pruritic papules with central ulceration over the face and arms. In all the patients the eruptions had been present for months, and the patients did not develop sepsis. Biopsy specimens in all the patients showed large Gram-positive cocci, forming tetrads. Colony morphology, catalase positivity and coagulase negativity, and resistance to nitrofurantoin were used to separate micrococci from staphylococci. Micrococcus species are usually considered normal inhabitants of the skin; however, in patients with HIV-1 disease, Micrococcus species can produce localized cutaneous infections.

Published
1999

39. Pollution Control and Energy Needs

Author

Robert M. Jimeson, GORDON K. ZARESKI, THOMAS W. HUNTER, GENE P. MORRELL, DAVID R. OLIVER, J. LISLE REED, ROBERT M. JIMESON, KURT E. YEAGER, J. W. HAMERSMA, M. L. KRAFT, E. P. KOUTSOUKAS, R. A. MEYERS, ROBERT G. SHAVER, S. A. QADER, G. R. HILL, A. A. GREGOLI, G. R. HARTOS, AXEL R. JOHNSON, RONALD H. and Robert M. Jimeson, GORDON K. ZARESKI, THOMAS W. HUNTER, GENE P. MORRELL, DAVID R. OLIVER, J. LISLE REED, ROBERT M. JIMESON, KURT E. YEAGER, J. W. HAMERSMA, M. L. KRAFT, E. P. KOUTSOUKAS, R. A. MEYERS, ROBERT G. SHAVER, S. A. QADER, G. R. HILL, A. A. GREGOLI, G. R. HARTOS, AXEL R. JOHNSON, RONALD H.

Published
1974

41. Abstracts of papers Minneapolis Fall Meeting

Author

Litchfield, C. C., Rakoff, Henry, Maire, René, Holman, R. T., Subbaram, M. R., Youngs, C. G., McCarthy, M. J., Kuksis, A., Trowbridge, J. R., Herrick, A. B., Bauman, R. A., Craig, B. M., Bhatty, M. K., Sen, N., Schlenk, H., Gellerman, J. L., Emken, E. A., Butterfield, R. O., Blank, M. L., Farquhar, Margaret, Reiser, Raymond, Luddy, F. E., Barford, R. A., Herb, S. F., Riemenschneider, R. W., Peifer, J. J., Muesing, R., Janssen, F., Schmit, J. A., Buchnea, Dmytro, Dufek, E. J., DeJarlais, W. J., Feuge, R. O., Zarins, Zigrida, Kircher, H. W., Johnston, A. E., Glass, C. A., Schmolka, I. R., Cenker, M., Kokorudz, M., Mangold, H. K., Houle, C. R., Bistline, Jr., R. G., Stirton, A. J., Berglund, E. D., Crecelius, S. B., Cohen, Irving, Economou, Peter, Spangler, W. G., Watanabe, Henry, Groves, W. L., Netzel, D. A., Stanley, C. W., Rathburn, D. W., Reck, R. A., Molnar, N. M., Baron, S., Horning, E. C., Holmes, W. L., Hamilton, J. G., Muldrey, J. E., Goldsmith, Grace A., Shulman, G. P., Link, W. E., Lew, H. Y., Desmond, C. T., Borden, W. T., Gildenberg, L., Lundgren, D. P., Keily, H. J., Knaggs, E. A., Varenyi, L., Yeager, J. A., Fischer, E., Weil, J. K., Stirton, A. J., Morrisroe, J., Atwood, R. W., Temple, R. E., Malins, D. C., Wekell, J. C., Morrissette, R. A., Ven Horst, Helen, Rohwedder, W. K., Selke, E., Scholfield, C. R., Tulloch, A. P., Schmid, H. H. O., Lundberg, W. O., Harris, J. A., Magne, F. C., Skau, E. L., Mehrens, J. E., Smullin, C. F., Cooper, A. D., Tuna, N., Heimberg, M., Fizette, N. B., Klausner, H., Horning, M., Mayer, S. E., Swoboda, P. A. T., Lea, C. H., Chipault, J. R., Mizuno, G. R., Anderson, R. H., Huntley, T. E., Moser, Helen A., Evans, C. D., Kwolek, W. F., Hill, F. D., Hammond, E. G., Pohle, W. D., Gregory, R. L., Van Giessen, B., Pohle, W. D., Weiss, T. J., Taylor, J. R., Ahern, J. J., Rolker, Jr., J. H., Rheineck, A. E., Shulman, Sol, Brand, B. G., Schoen, H. O., Gast, L. E., Cowan, J. C., Peng, S. C. S., Wood, D. L., Hopper, Jr., L. L., Dollear, F. G., Zimmerman, D. D., Therriault, D. G., Taylor, J. F., Westphal, U., Mullen, J. D., Smith, D. E., Riser, G. R., Bloom, F. W., Witnauer, L. P., Mod, R. R., Magne, F. C., Bell, E. W., Friedrich, J. P., Gast, L. E., Maerker, G., Haeberer, E. T., Ault, W. C., Kenney, H. E., Komanowsky, Daria, Wrigley, A. N., Eisner, Abner, Perlstein, Theodore, Beal, R. E., Fitton, P., Pryde, E. H., Mayland, B. J., Harvin, R. L., Trimarke, C. R., Frankel, E. N., Davison, V. L., Emken, E., Mabrouk, A. F., Selke, E., Rohwedder, W. K., Lavery, H., Oakley, H. B., Lovegren, N. V., Bradshaw, B., Scott, W. E., Krewson, C. F., Oswald, J., Crauer, L. S., Pennington, H., Carter, Fairie Lyn, Frampton, V. L., McGhee, J. E., Kirk, L. D., Mustakas, G. C., Scott, W. E., Griffin, Jr., E. L., Allen, L. E., Smith, O. B., Downey, R. K., Black, L. T., Jurbergs, K. A., Dowling, D. J., Szutowicz, Walter, McKillican, Mary E., Bell, J. M., Rahm, J. J., Kaunitz, Hans, Johnson, Ruth Ellen, Blank, Merle, Privett, O. S., Mahadevan, V., Cubero, E., Lundberg, W. O., Sand, D., and Feldman, G. L.

Published
1963
Full Text
View/download PDF

42. Multistate outbreak of human Salmonella Typhimurium infections associated with aquatic frogs--United States, 2009

Author

Hall, J., Poulson, M., Fawcett, L., Cosgrove, S., Lujan, K., Torres, P., Adams-Cameron, M., Winpisinger, K., Yeager, J., Hudecek, P., Hyytia-Trees, E., Garrett, N., Adams, J., Ewald, G., Le, B., Hausman, L., Behravesh, C. Barton, Williams, I., Sodha, S., Capewell, L., and Mettee, S.

Subjects
Salmonella typhimurium -- Distribution, Epidemics -- Distribution -- United States, Frogs -- Health aspects, Company distribution practices, Health
Abstract

During April-July 2009, the Utah Department of Health identified five cases of Salmonella Typhimurium infection with indistinguishable pulsed-field gel electrophoresis (PFGE) patterns, predominantly among children. In August, CDC began a [...]

Published
2010

43. E1698

Author

Silverman, D. L., Yeager, J. E., and Dodds, Gerald C.

Published
1965
Full Text
View/download PDF

47. Cholesterol embolization syndrome: cutaneous histopathological features and the variable onset of symptoms in patients with different risk factors

Author

H. Skelton, Yeager J, K.J. Smith, and M. Pennington

Subjects
Male, medicine.medical_specialty, Dermatology, Skin Diseases, Vascular, Angina, Diabetes Complications, Pathognomonic, Risk Factors, Biopsy, medicine, Diabetes Mellitus, Humans, Angina, Unstable, Risk factor, Livedo reticularis, Aged, Embolism, Cholesterol, Gangrene, medicine.diagnostic_test, business.industry, Arteries, Middle Aged, medicine.disease, Surgery, body regions, Embolism, Aortic Valve, Heart Valve Prosthesis, Female, medicine.symptom, Complication, business
Abstract

Cholesterol embolization syndrome (CES) may not only be due to direct dislodgement of cholesterol crystals from atherosclerotic plaques on the walls of arteries by surgery, angiogram or trauma, but may occur after anticoagulant and thrombolytic therapy. The latter two therapies both weaken the fibrin clot that stabilizes the atheromas in place; however, these two therapies commonly have different onsets of CES after their institution. We present three patients with different risk factors for CES who all presented with the pathognomonic triad of leg and/or foot pain, livedo reticularis and good peripheral pulses. In all three patients cholesterol emboli were demonstrated in cutaneous biopsy sections. In two patients there was associated renal involvement, which was fatal in one case. These cases illustrate that cutaneous biopsy may be diagnostic in patients with livedo reticularis, which progresses to necrosis and gangrene. In addition, they illustrate the problems and contradictions involved in treating patients with CES.

Published
2002

48. Characterization of a Head-Only Aerosol Exposure System for Nonhuman Primates

Author

ARMY MEDICAL RESEARCH INST OF INFECTIOUS DISEASES FORT DETRICK MD AEROBIOLOGY DIV, Dabisch, P. A., Kline, J., Lewis, C., Yeager, J., Pitt, M. L., ARMY MEDICAL RESEARCH INST OF INFECTIOUS DISEASES FORT DETRICK MD AEROBIOLOGY DIV, Dabisch, P. A., Kline, J., Lewis, C., Yeager, J., and Pitt, M. L.

Abstract

A well-characterized exposure chamber is necessary to generate reproducible atmospheres for inhalation toxicology studies. The aim of the present study was to characterize a head-only exposure chamber for non-human primates. Aerosols containing bovine serum albumin (BSA) were used to characterize a 16-L dynamic airflow head-only exposure chamber. A 2S0-ml plastic bottle with a respirator attached located inside the chamber was used to simulate a breathing head. Chamber leak rate, mixing, and aerosol spatial distributions were quantified. The chamber concentration profile was measured at the chamber exhaust using an aerodynamic particle sizer. Aerosol spatial distribution was determined by collecting filter samples at several chamber locations. The particle size distribution was determined by collecting cascade impactor samples at several chamber locations. The estimated chamber leak rate was within standards suggested in the literature. The measured average aerosol residence time was similar to theoretical aerosol residence time, suggesting that the chamber was mixing well. Additionally, the average concentration measured at each of the sampling locations within the chamber was similar, and the within-run coefficients of variation (CV) across all sampling locations was similar to those reported in previously published studies, again suggesting that the aerosol concentration throughout the chamber was uniform. The particle size distribution was similar throughout the exposure chamber. Additionally, the BSA concentration and particle size distributions measured in the breathing zone of the simulated head were not significantly different from measurements made elsewhere in the chamber, suggesting that respiration does not affect the average aerosol concentration or particle size distribution at the mouth., Published in Inhalation Technology, v22 n3 p224-233, 2010. Performed in collaboration with Akimeka, Inc., Frederick, MD.

Published
2010

49. Is CD30 (Ki-1) immunostaining in cutaneous eruptions useful as a marker of Th1 to Th2 cytokine switching and/or as a marker of advanced HIV-1 disease?

Author

Terry L. Barrett, Ronald C. Neafie, K.J. Smith, Tomaszewski Mm, Wagner Kf, Yeager J, H. Skelton, and Ann Marie Nelson

Subjects
Pathology, medicine.medical_specialty, CD30, Lymphocyte, CD3, medicine.medical_treatment, Ki-1 Antigen, Leishmaniasis, Cutaneous, Dermatitis, HIV Infections, Dermatology, Th2 Cells, Immunopathology, Leprosy, medicine, Humans, biology, Th1 Cells, CD4 Lymphocyte Count, medicine.anatomical_structure, Cytokine, Immunology, biology.protein, Disease Progression, HIV-1, Cytokines, Viral disease, Antibody, Immunostaining, Biomarkers
Abstract

CD30 is a member of the tumour necrosis factor/nerve growth factor receptor superfamily, which is expressed on CD4 + and CD8 + T-cell clones which produce T helper (Th) 2-type cytokines. It has been proposed that disease progression in HIV-1 is associated with Th1 to Th2 cytokine switching. In 70 cutaneous biopsies from HIV-1 positive patients in different stages of disease, we performed a battery of immunohistochemical stains. These included antibodies to CD3, UCHL-1, OPD-4, L-26, KP-1 and CD30 (Ki-1). In addition, we used a similar battery of stains on cutaneous biopsies of HIV-1 negative patients with inflammatory dermatoses which are established as Th1 or Th2 dominant, e.g. polar leprosy. CD30 + cells were rarely present in early stages of HIV-1 disease, but commonly present in later stages of disease. However, there were cases of late HIV-1 disease which did not contain CD30 + cells. Increased numbers of CD30 + cells were more commonly seen in later stages of HIV-1 disease. However, the expression of CD30 appeared to be better in predicting other established Th2 cutaneous infiltrates in HIV-1 negative patients than in predicting a Th2 cutaneous cytokine pattern in advanced HIV-1 disease.

Published
1998

Catalog

Books, media, physical & digital resources
See catalog results