Results 81 to 90 of about 520,939 (335)

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende, Emilien Petit, Young Woo Park, Sophie Tezenas du Montcel, James M. Joers, Jonathan M. DuBois, H. Moore Arnold, Michal Povazan, Ipek Özdemir, Guita Banan, Romain Valabregue, Philipp Ehses, Jennifer Faber, Chiadi U. Onyike, Peter B. Barker, Jeremy D. Schmahmann, Eva‐Maria Ratai, Sub H. Subramony, Thomas H. Mareci, Khalaf O. Bushara, Henry Paulson, Thomas Klockgether, Alexandra Durr, Tetsuo Ashizawa, Christophe Lenglet, Gülin Öz, READISCA Investigators   +26 more
wiley   +1 more source

Optimal Alignment Sensing of a Readout Mode Cleaner Cavity [PDF]

, 2011
Critically coupled resonant optical cavities are often used as mode cleaners in optical systems to improve the signal to noise ratio (SNR) of a signal that is encoded as an amplitude modulation of a laser beam. Achieving the best SNR requires maintaining
Anderson, Breitenbach, Grote, K. Kawabe, Kawabe, Kippenberg, M. Evans, N. Mavalvala, N. Smith-Lefebvre, S. Ballmer, S. Waldman, Sigg, V. Frolov   +12 more
core   +2 more sources

Feasibility and Tolerability of Performing Portable MRI for Neurological Disorders in an Outpatient Neurology Clinic: A Prospective Cohort

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Accessing brain magnetic resonance imaging (MRI) can be challenging, especially for underserved patients, which may lead to disparities in neurological diagnosis. Method This mixed‐methods study enrolled adults with one of four neurological disorders: mild cognitive impairment or dementia of the Alzheimer type, multiple sclerosis ...
Maya L. Mastick, Nomin Enkhtsetseg, Joseph Sadok, Matheus Mochetti, Annabel Sorby Adams, Jennifer Guo, Cristina Trapaga Hacker, Isabella Gomez Hjerthen, Seungwon Lee, Siddharth Satish, Andrew S. Ham, Justin Hill, Denis Balaban, Kevin Kyle, Rebecca L. Gillani, Marcelo Matiello, Aleksandar Videnovic, Eric C. Klawiter, W. Taylor Kimberly, Farrah J. Mateen   +19 more
wiley   +1 more source

Signal velocity, causality, and quantum noise in superluminal light pulse propagation

, 2001
We consider pulse propagation in a linear anomalously dispersive medium where the group velocity exceeds the speed of light in vacuum (c) or even becomes negative. A signal velocity is defined operationally based on the optical signal-to-noise ratio, and
A. Dogariu, A. Dogariu, A. Kuzmich, B. E. A. Saleh, B. Segev, C. M. Caves, E. Desurvire, G. Diener, H. A. Haus, J. Oppenheim, L. Brillouin, L. J. Wang, L. J. Wang, L. Mandel, P. W. Milonni, P. W. Milonni, R. Y. Chiao, R. Y. Chiao, R. Y. Chiao, S. Chu, W. K. Wooters, Y. Aharonov, Y. Yamamoto   +22 more
core   +1 more source

Quantum Noise and Superluminal Propagation [PDF]

, 2000
Causal "superluminal" effects have recently been observed and discussed in various contexts. The question arises whether such effects could be observed with extremely weak pulses, and what would prevent the observation of an "optical tachyon." Aharonov ...
A. M. Steinberg, A. M. Steinberg, Ch. Spielmann, D. C. Burnham, D. Polder, E. L. Bolda, E. L. Bolda, G. Diener, G. Kurizki, J. J. Maki, M. W. Mitchell, P. W. Milonni, R. Glauber, R. Y. Chiao, R. Y. Chiao, R. Y. Chiao, R. Y. Chiao, R. Y. Chiao, Y. Aharonov   +18 more
core   +2 more sources

Knee Crepitus and Osteoarthritis Features in Young Adults Following Traumatic Knee Injury

Arthritis Care &Research, EarlyView.
Objective This study explored the association between knee crepitus and the presence, and worsening, of structural osteoarthritis features and self‐reported outcomes in young adults following traumatic knee injury. Methods One year following anterior cruciate ligament reconstruction (ACLR), 112 participants (41 female participants; median age 28 years ...
Jamon L. Couch, Brooke E. Patterson, Kay M. Crossley, Ali Guermazi, Matthew G. King, Danilo De Oliveira Silva, Jackie L. Whittaker, Michael A. Girdwood, Adam G. Culvenor   +8 more
wiley   +1 more source

A Joint OSNR and Nonlinear Distortions Estimation Method for Optical Fiber Transmission System

IEEE Photonics Journal, 2018
In this paper, we propose and demonstrate a joint optical signal-to-noise ratio (OSNR) and a nonlinear distortions estimation method. The OSNR is calculated by considering either the link parameters or the correlation operations of the training symbols ...
Yating Xiang, Ming Tang, Qiong Wu, Huibin Zhou, Bo Yong, Songnian Fu, Deming Liu   +6 more
doaj   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Ultrasound-modulated optical tomography using four-wave mixing in photorefractive polymers [PDF]

, 2008
Ultrasound-modulated optical tomography uses a well focused ultrasound beam to modulate diffuse light inside soft biological tissues. This modality combines the advantages of ultrasound resolution with optical contrast.
Hemmer, Philip, Rokutanda, Shuji, Wang, Lihong V., Wang, Peng, Yamamoto, Michiharu, Zhang, Huiliang   +5 more
core  

Trace Nickel Activated Biphasic Core‐CuOii/Shell‐CuOi Secondary Microspheres Enable Room Temperature Parts‐Per‐Trillion‐Level NO2 Detection

Advanced Engineering Materials, EarlyView.
An idea of designing novel sensors is proposed by creating appropriate Schottky barriers and vacancies between isomorphous Core‐CuOii/ Shell‐CuOi secondary microspheres and enhancing catalytic and spill‐over effects, and electronegativity via spontaneous biphasic separation, self‐assembly, and trace‐Ni‐doping.
Bala Ismail Adamu, Peipei Chen, Shafia Mukhtar Ibrahim, Mukhtar Lawan Adam, Attia Falak, Mokhotjwa Simon Dhlamini, Hanfu Wang, Lingxiang Jiang, Weiguo Chu   +8 more
wiley   +1 more source