2,883 research outputs found
Lucien Mattison: 47th Annual ODU Literary Festival
No full textLucian Mattison is a US-Argentinian poet and translator and the author of three books of poetry, Curare (C&R Press, 2022), 2023 International Latino Book Awards, Silver Medal Winner; Reaper\u27s Milonga (YesYes Books, 2018); and Peregrine Nation (Dynamo Verlag, 2017). His work has won the Puerto Del Sol Poetry Prize, nomination for the Pushcart Prize, and appears in numerous journals, including The Adroit Journal, The Cincinnati Review, CutBank, Fugue, Hayden\u27s Ferry Review, and The South Carolina Review. He received his MFA in 2015 from Old Dominion University and is currently based out of Oakland, California
A Novel Approach for Effective Dose Measurements in Dual-Energy
No full textPurpose:Our goal was to test a novel concept approximating organ dose measurements using the single mean energy of the two sources in dual-energy (DE) CT environment. Therefore, the purpose of this study was two-fold: (1) To obtain experimental validation of dose equivalency between MOSFET and ion chamber (as gold standard) under a dual-energy environment; (2) To estimate the effective dose (ED) using MOSFET detectors and an anthropomorphic phantom in DE CT scans.Materials and Methods:A commercial dual source CT (DSCT) scanner was employed for the study. The scanner was operated at 80kV/140kV (Sn added) using an abdomen/pelvis scanning protocol. A five-phase approach was used. Specific goals for each phase are as follows: (1) Characterize the mean energy from the combined clinical 80kV/Sn140kV beams; (2) Estimate the f-factor for tissues from the mean energy; (3) Calibrate the MOSFET detectors using the mean energy; (4) Validate MOSFET calibration with a CTDI phantom; (5) Measure organ doses for a typical abdomen/pelvis scan using a male anthropomorphic phantom and derive ED using ICRP 103 tissue weighting factors. For validation of dose equivalency, a MOSFET detector and ion chamber measured the dose at the center cavity of a CTDI body phantom. A student t-test was used to determine if the difference between the two was statistically significant.Results:The mean energy was calculated to be 67 kVp based on the corresponding spectra for the clinical DE beams. Using the Mean Energy Method, the tissue dose in the center cavity of the CT body phantom was 2.08 ± (2.70%) cGy with an ion chamber and 2.20 ± (4.82%) cGy with MOSFET respectively with a percent difference of 5.91% between the two measurements. The results (p = 0.15) showed no statistically significant difference. ED for DE abdomen/pelvis scan was calculated as 5.01 ± (2.34%) mSv by the MOSFET method and 5.56 mSv by the DLP method respectively.Conclusion:There has been no physical method to measure organ doses in DE CT scans. We have developed and validated a novel approach, the Mean Energy Method - for organ dose estimation in DE CT scans. ED from the anthropomorphic phantom compared well (within 11%) between the MOSFET method and DLP method.</p
Pilots of the 332nd Fighter Group brush up on use of .45 caliber colt
No full textPilots of the 332nd Fighter Group brush up on use of .45 caliber colt automatic which they carry in combat. L to R: Lts. Richard C. Caesar, John A. Gibson, William T. Mattison, George L. Know, Howard L. Baugh, and Clinton B. Millshttps://dh.howard.edu/ccjphotos_332nd/1011/thumbnail.jp
An Archivist's Weblog from Canada: Ten Thousand Year Blog
No full textThe Ten Thousand Year Blog is written by David Mattison. He writes about his weblog (born 2001): Electronic records and digital preservation catch your fancy? If you're an archivist or historian or just plain anyone worried about the digital future, The Ten Thousand Year Blog is for you. The title is inspired by physicist and speculative fiction author Gregory Benford's DEEP TIME: HOW HUMANITY COMMUNICATES ACROSS MILLENNIA (1999)
High-Resolution Label Free Imaging of Endogenous Chromophore via Non-Linear Photoacoustic Microscopy
No full textMolecular specific subcellular imaging of biological tissues is vital for understanding the mechanisms of various pathologies. Current technologies for subcellular absorption contrast imaging, such as fluorescence confocal microscopy, require exogenous contrast agents to gain access to relevant biomolecules. All non-fluorescing biomolecules must therefore be tagged by a fluorescent marker to be visible in fluorescence confocal images. While these markers are effective, they can change the local environments, and any exogenous contrast agent must first achieve FDA approval for wide-spread use in humans.
Photoacoustic microscopy (PAM) is a hybrid imaging modality combining optical absorption imaging with ultrasonic detection capable of endogenous absorption contrast. Unfortunately, traditional photoacoustic microscopy suffers from poor axial resolution, precluding it from three-dimensional subcellular imaging. High axial resolution may be lent to PAM through the addition of a pump-probe spectroscopy technique known as transient absorption. This high resolution PAM technique, known as transient absorption ultrasonic microscopy (TAUM) enables three-dimensional subcellular imaging of endogenous biomolecules.
The pump-probe spectroscopy properties inherent to TAUM provide optically resolved point spread functions, access to ground state recovery time, and access to transient absorption spectrum measurements. This manuscript describes the author���s efforts to improve the processing capabilities of both PAM and TAUM.
In this manuscript various TAUM systems are designed and characterized in detail. A second generation TAUM system improves the processing speed of TAUM to enable processing in parallel with data acquisition. Following the improvements to processing, a novel optical schematic of TAUM is developed, greatly simplifying the design requirements of TAUM images. This system is validated by collecting volumetric images of erythrocytes in blood smears. This work enables any PAM system to be converted to a TAUM system through the addition of an optical modulator. The culmination of this work is a multispectral TAUM system hybridized with a confocal microscope to enable high resolution imaging with both scattering and absorption contrast of biological tissues. The capabilities of this PAM and TAUM are demonstrated by obtaining high resolution images of the endogenous chromophores: hemoglobin, melanin, and cytochrome C
Miss Jacqueline Jean Gerlach marries Claude J. Lasseter Jr.
No full textMiss Jacqueline Jean Gerlach married Claude J. Lasseter Jr. at the Arlington Heights Baptist Church. The bridegroom\u27s parents were Mr. and Mrs. C. J. Lasseter, 3629 Mattison. The bride is the daughter of Mr. and Mrs. T. J. Gerlach, of Jacksboro Highway. The bride wore a navy blue crepe frock with white gloves and a white hat with nylon net veiling. Published in the Fort Worth Star-Telegram morning edition, January 22, 1950.https://mavmatrix.uta.edu/specialcollections_startelegram1950s/1520/thumbnail.jp
Fort Worth Children\u27s Museum puppet circus
No full textJane Lemon, left, and Barbara Walker ready the big top for the Fort Worth Children\u27s Museum puppet circus May 26 as Tommy Parker practices with two of the star puppets. Jane is the daughter of Dr. and Mrs. R. G. Lemon, 3806 Mattison; Barbara\u27s parents are Dr. and Mrs. James N. Walker, 3837 Bunting, and Tommy is the son of Mr. and Mrs. W. T. Parker, 4424 Rutland.https://mavmatrix.uta.edu/specialcollections_startelegram1950s/12434/thumbnail.jp
Frogs and Toads of the World, by Chris Mattison [Review]
No full textVolume: 103Start Page: 116End Page: 11
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