Results 101 to 110 of about 10,332,383 (291)

Understanding the rich physics of light propagation in slow photonic crystal waveguides [PDF]

, 2010
Selected papers. Held as part of SPIE Photonics West 2010.We study propagation losses in slow light photonic crystal waveguides and show that dispersion engineering can reduce the loss.
Lalanne, Phillippe, De La Rue, Richard, Beggs, Daryl M., M. Sorel, MELLONI, ANDREA IVANO, Thomas F. Krauss, Francesco Morichetti, Schulz, Sebastian, Beggs, Daryl Matthew, Sebastian Schulz, Marc Sorel, Samarelli, Antonio, Liam O'Faolain, Krauss, Thomas F., Daryl M. Beggs, Sorel, Marc, Simon Mazoyer, L. O'Faolain, Morichetti, Francesco, D. M. Beggs, S. Schulz, Canciamilla, Antonio, A. Samarelli, TORREGIANI, MATTEO ALDO, O'Faolain, Liam, Antonio Samarelli, Andrea Melloni, Torregiani, M., Richard De La Rue, Phillippe Lalanne, Melloni, Andrea, Antonio Canciamilla, T. F. Krauss, Mazoyer, Simon, R. De La Rue, M. Torregiani   +35 more
core   +1 more source

Calculation of Guided Wave Dispersion Characteristics Using a Three-Transducer Measurement System

Applied Sciences, 2018
Guided ultrasonic waves are of significant interest in the health monitoring of thin structures, and dispersion curves are important tools in the deployment of any guided wave application.
Borja Hernandez Crespo, Charles R. P. Courtney, Bhavin Engineer   +2 more
doaj   +1 more source

Gravity‐Dependent Modulation of Downbeat Nystagmus: Insights From Velocity‐Storage Dysfunction

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Downbeat nystagmus varies with head position, a phenomenon termed gravity‐dependent modulation. We aimed to clarify its mechanism using a velocity‐storage model. Methods In 10 patients with downbeat nystagmus due to cerebellar disorders, we recorded eye movements at different pitch‐ and roll‐axis head positions.
Ji‐Hyung Park, Eun‐Hyuk Choi, Jorge Otero‐Millan, David S. Zee, Jeong‐Yoon Choi, Ji‐Soo Kim   +5 more
wiley   +1 more source

Global Rather Than Vertical‐Selective Saccadic Abnormalities in Progressive Supranuclear Palsy

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To test whether vertical saccades are preferentially affected in Progressive Supranuclear Palsy (PSP). Methods PSP patients (n = 24) were compared to age‐matched controls (n = 94) and two degenerative groups (Alzheimer's disease, n = 20; Lewy body disease, n = 50).
Duy Duan Nguyen, Mark Paine, Soohyun Lee, Amir Fazlollahi, Baibin (Ben) Wang, John D. O'Sullivan, Peter J. Nestor   +6 more
wiley   +1 more source

Measurement of group velocity dispersion of solvents using 2-cycle femtosecond pulses: Experiment and theory

AIP Advances, 2011
Second and third-order dispersion for water, methanol, cyclohexane, carbon tetrachloride, dimethyl sulfoxide, toluene and carbon disulfide are measured with high accuracy and precision in the range of 700-900 nm using two-cycle long femtosecond laser ...
Pampa Devi, Vadim V. Lozovoy, Marcos Dantus   +2 more
doaj   +1 more source

Troponin T and Neurofilament Light Chain Levels as Complementary Biomarkers of Disease Accumulation and Aggressiveness in Amyotrophic Lateral Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Amyotrophic lateral sclerosis (ALS) is a clinically heterogeneous neurodegenerative disease requiring reliable biomarkers to improve patient stratification and trial design. While serum neurofilament light chain (sNfL) reflects neuroaxonal stress and disease aggressiveness, troponin T (TnT) may capture complementary aspects of ...
Julia Sellin, Sofia Waldorf, Janina von der Gablentz, Torsten Grehl, Huelya Nazlican, Thomas Meyer, Julian Grosskreutz, Patrick Weydt, Sarah Bernsen   +8 more
wiley   +1 more source

Solute dispersion by 1D stepped velocity fluctuations [PDF]

, 2003
The effect of fluctuations in the drift velocity on dispersion by a porous medium is investigated. An analytical model is developed which represents the effect of a single discrete step in the velocity of a 1 dimensional flow as a multiplicative factor ...
Verwoerd, W, Kulasiri, Don
core  

White Matter and Perivascular Imaging Changes in Alzheimer's Disease and Cerebral Amyloid Angiopathy

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Peak‐width of skeletonized mean diffusivity (PSMD) and diffusion tensor imaging–analysis along the perivascular space (DTI‐ALPS), reflecting white matter integrity and glymphatic function, are altered in Alzheimer's disease (AD).
Debina Laishram, Guangwei Du, Sangam Kanekar, Nandakumar Nagaraja   +3 more
wiley   +1 more source

Solute dispersion in porous flow with a constant velocity gradient [PDF]

, 2002
In a previous paper, we have shown that stepwise changes in the macroscopic flow velocity of a carrier fluid through a porous medium, substantially affects the dispersion of solutes that it carries.
Kulasiri, D, Verwoerd, WS
core  

Reserves, Injury Severity, and Outcomes in Traumatic Brain Injury: A CENTER‐TBI Observational Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Reserve refers to the brain's ability to maintain function after an injury and strongly relates to traumatic brain injury (TBI) outcomes. This study examined (1) whether associations between pre‐injury reserve proxies and outcomes differed across injury severity categories, and (2) whether the impact of injury severity varied across ...
Natascha Ekdahl, Marika C. Möller, Lindsay Wilson, Anne Vik, Toril Skandsen, Jonas Stenberg, CENTER‐TBI participants and investigators   +6 more
wiley   +1 more source