Results 81 to 90 of about 1,065,609 (199)

Association Between Sleep Quality and Oxidative Stress in Postoperative Cardiovascular Patients—A Pilot Study

Journal of Sleep Research, EarlyView.
In 15 postoperative cardiac surgery patients, venous reactive oxygen species (ROS) measured by electron spin resonance (ESR) over 48 h showed no consistent circadian pattern. Higher ROS was associated with lower subjective sleep efficiency and more nocturnal awakenings, but not with other sleep measures.
K. Krawczyk, D. Riemann, E. Schleicher, A. Günther, A. Ayekoi, M. Czerny, J. S. Pooth, T. Böhmerle, B. Feige, J. Sahlmann, F. Beyersdorf   +10 more
wiley   +1 more source

Unsteady dean flow of dusty fluids between two oscillating cylinders

Proceedings of the Nigerian Society of Physical Sciences
This study investigates the unsteady Dean flow of dusty, viscous, incompressible fluids confined between two oscillating concentric horizontal cylinders under a semi-analytical framework based on Laplace transformation, which is preferred over fully ...
Jibrin Danjuma Yahaya, Benedict Celestine Agbata, Olayiwola Rasaq Oyeyemi, Muhammed Raji, Isaac Adaji, Danjuma Abdul Yusuf, Emmanuel Olorunfemi Senewo   +6 more
doaj   +1 more source

Exploring the Association Between Complaints of Sensory Hypersensitivity and Sleep Disturbances After Acquired Brain Injury: A Cross‐Sectional Study

Journal of Sleep Research, EarlyView.
ABSTRACT Sleep disturbances are prevalent after acquired brain injury and negatively affect quality of life. Sensory hypersensitivity may cause or exacerbate sleep disturbances, yet evidence on this relationship after acquired brain injury is lacking. The aim of this study was to investigate the hypothesised positive relationship between the severity ...
A. F. Ten Brink, W. I. J. van der Veere, J. A. de Graaf, I. Huenges Wajer, O. Verschuren   +4 more
wiley   +1 more source

Whole‐Night Gentle Rocking Improves Sleep in Poor Sleepers With Insomnia Complaints

Journal of Sleep Research, EarlyView.
ABSTRACT Specific brain oscillations can be manipulated during sleep to improve sleep quality and memory performance. We previously demonstrated that continuous rocking stimulation (0.25 Hz, lateral movement) applied to good sleepers during sleep enhanced stable deep sleep, boosted NREM oscillations (spindles and slow waves) and memory consolidation ...
Aurore A. Perrault, Nathan E. Cross, Thien Thanh Dang Vu, Sophie Schwartz, Laurence Bayer   +4 more
wiley   +1 more source

The Development of the European Sleep Questionnaire A New Patient‐Reported Outcome Measure

Journal of Sleep Research, EarlyView.
ABSTRACT Sleep medicine relies on patient‐reported outcome measures (PROMs) to complement clinical interviews and objective sleep tests. Available sleep questionnaires focus on isolated symptoms or single disorders, limiting their ability to capture the complexity of sleep conditions. Also, many PROMs remain poorly validated.
Dirk A. Pevernagie, Marie De Bruecker, Elke Veirman, Geert Crombez, Dimitri M. L. Van Ryckeghem, Katrien Hertegonne, Fré A. Bauters, Inger L. Abma, Erna Sif Arnardottir, Ludger Grote, Jan Hedner, Anna Sigridur. Islind, Kamilla Rún Jóhannsdóttir, Gert Jan Lammers, Walter T. McNicholas, Piet‐Heijn van Mechelen, Kristín Anna Ólafsdóttir, Sebastiaan Overeem, Dieter Riemann, Reijo Sund, An Mariman   +20 more
wiley   +1 more source

Excluded Volume Effect in GI/G/s Queues

IEEE Access
This study developed an approximation framework for GI/G/s queues with excluded volumes. Building on a discrete-time GI/G/1 framework that embeds the totally asymmetric simple exclusion process (TASEP) via matrix-geometric and aggregation methods, we ...
Takako Hoshiyama, Katsuhiro Nishinari
doaj   +1 more source

Band‐Pass Filtering With High‐Dimensional Time Series. A Synthetic Indicator of the Medium‐to‐Long Run Component of Growth

Journal of Time Series Analysis, EarlyView.
ABSTRACT The paper deals with the construction of a synthetic indicator of economic growth, obtained by projecting a quarterly measure of aggregate economic activity, namely gross domestic product (GDP), into the space spanned by a finite number of smooth principal components, representative of the medium‐to‐long‐run component of economic growth of a ...
Alessandro Giovannelli, Marco Lippi, Tommaso Proietti   +2 more
wiley   +1 more source

Theoretical Investigation of Fractional Estimations in Liouville–Caputo Operators of Mixed Order with Applications

Axioms
In this study, to approximate nabla sequential differential equations of fractional order, a class of discrete Liouville–Caputo fractional operators is discussed.
Pshtiwan Othman Mohammed, Alina Alb Lupas, Ravi P. Agarwal, Majeed A. Yousif, Eman Al-Sarairah, Mohamed Abdelwahed   +5 more
doaj   +1 more source

Detecting Periodicity of a General Stationary Time Series via AR(2)‐Model Fitting

Journal of Time Series Analysis, EarlyView.
ABSTRACT Estimating the periodicity of a stationary time series via fitting a second‐order stationary autoregressive (AR(2)) model has been initiated by the seminal paper of Yule (1927). We investigate properties of this procedure when applied to general stationary processes possessing a spectral density with a dominant peak at some unknown frequency ...
Jens‐Peter Kreiss, Panagiotis Maouris, Efstathios Paparoditis   +2 more
wiley   +1 more source

On the Exact Limiting Distribution of a Volatility Target Index

Mathematical Finance, EarlyView.
ABSTRACT Assuming a lognormal distribution for the underlying risky asset, we study the limiting distribution of a volatility target index as the rebalancing time step approaches zero. Two limit theorems (a strong law of large numbers and a central limit theorem) are established, and as an application, the exact limiting distribution is derived.
Xuan Liu, Michel Gauthier
wiley   +1 more source