Zobrazeno 1 - 10
of 38
pro vyhledávání: '"James A. Brown"'
Autor:
Tyler J. Hardy, Darryl J. Sanchez, Michael Bishop, Denis W. Oesch, Erica M. Hoeffner, Odell Reynolds, Dennis A. Montera, Miles Buckman, James M. Brown, Brian T. Kay
Publikováno v:
Adaptive Optics Systems VI.
The performance of closed-loop tilt-control and adaptive-optics systems suffers when conditions change. Examples of changing conditions are angular extent of the object, signal-to-noise ratio, and characteristics of the disturbance. A simple learning
Autor:
James M. Brown, Xia Zhu, Theodore L. Willke, Bruce R. Rosen, Elizabeth R. Gerstner, Andrew Beers, Dipanjan Sengupta, Ken Chang, Jayashree Kalpathy-Cramer
Publikováno v:
Medical Imaging 2018: Physics of Medical Imaging.
Several digital reference objects (DROs) for DCE-MRI have been created to test the accuracy of pharmacokinetic modeling software under a variety of different noise conditions. However, there are few DROs that mimic the anatomical distribution of voxe
Autor:
Deniz Erdogmus, Andrew Beers, R.V. Paul Chan, James M. Brown, Stratis Ioannidis, Jennifer G. Dy, Kyra Donohue, Ken Chang, J. Peter Campbell, Michael F. Chiang, Susan Ostmo, Jayashree Kalpathy-Cramer
Publikováno v:
Medical Imaging 2018: Imaging Informatics for Healthcare, Research, and Applications.
Retinopathy of prematurity (ROP) is a disease that affects premature infants, where abnormal growth of the retinal blood vessels can lead to blindness unless treated accordingly. Infants considered at risk of severe ROP are monitored for symptoms of
Autor:
Bruce R. Rosen, Jayashree Kalpathy-Cramer, James M. Brown, Ken Chang, Elizabeth R. Gerstner, Andrew Beers
Publikováno v:
Medical Imaging: Image Processing
In the last five years, advances in processing power and computational efficiency in graphical processing units have catalyzed dozens of deep neural network segmentation algorithms for a variety of target tissues and malignancies. However, few of the
Autor:
James M. Brown, Katia Shtyrkova, Darryl J. Sanchez, Denis W. Oesch, Julie C. Smith, Patrick R. Kelly, Carolyn M. Tewksbury-Christle
Publikováno v:
SPIE Proceedings.
The ASALT lab has been investigating the use of a segmented MEMS DM in adaptive optics systems. One of the anticipated benefits of a segmented device is that in monochromatic light the throw is essentially infinite due to the modulo 2π nature of the
Publikováno v:
SPIE Proceedings.
This paper presents results that demonstrate the auroral modeling capabilities of the Air Force Research Laboratory (AFRL) SAMM2 (SHARC And MODTRAN® Merged 2) radiance code. A scene generation capability is obtained by coupling SAMM2 with a recently
Publikováno v:
SPIE Proceedings.
Optimal sensor management of dispersed and disparate sensors for tracking Low Earth Orbit (LEO) objects presents a daunting theoretical and practical challenge since it requires the optimal utilization of different types of sensors and platforms that
Publikováno v:
SPIE Proceedings.
A new correlated-k algorithm has recently been incorporated into SAMM-2, the Air Force Research Laboratory background radiance and transmission code. SAMM-2 incorporates all of the major components necessary for background scene generation at all alt
Publikováno v:
SPIE Proceedings.
We investigated the contributions of the hydroxyl (OH) airglow to the illumination of resident space objects. During nighttime, in a moonless sky, the airglow is the largest contributor to the sky brightness in the visible (vis), the near-infrared (N
Autor:
Trae Holcomb, Joshua L. Kann, Ann C. Slavin, Robert Q. Fugate, Andrea L. Tuffli, William H. Lowrey, James M. Spinhirne, Jim F. Riker, James M. Brown
Publikováno v:
SPIE Proceedings.
Progress on active tracking at the Starfire Optical Range (SOR) has been significant in the years 2003-2004. We have obtained laser returns from a number of retro-reflector and also unaugmented satellite objects, and compared the signal returns to th