Results 71 to 80 of about 920 (198)

Experimental identification and robust optimization of spindle–bearing systems with reliability constraints [PDF]

Mechanical Sciences
Effective vibration control and dynamic behavior management in the presence of parameter uncertainties are critical for high-speed motorized spindles.
H. Wu, J. Ma
doaj   +1 more source

Novel murine closed‐loop auditory stimulation paradigm elicits macrostructural sleep benefits in neurodegeneration

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary Boosting slow‐wave activity (SWA) by modulating slow waves through closed‐loop auditory stimulation (CLAS) might provide a powerful non‐pharmacological tool to investigate the link between sleep and neurodegeneration. Here, we established mouse CLAS (mCLAS)‐mediated SWA enhancement and explored its effects on sleep deficits in neurodegeneration,
Inês Dias, Sedef Kollarik, Michelle Siegel, Christian R. Baumann, Carlos G. Moreira, Daniela Noain   +5 more
wiley   +1 more source

Development and Experimental Verification of a Thermal Elongation Prediction Model for Electric Spindles

Machines
Thermal elongation in high-speed motorized spindles constitutes a major source of machining error in five-axis machine tools, critically impacting machining precision.
Xinyu Liu, Lefu Jiang, Han Ye
doaj   +1 more source

How Mental Concepts Shape Sleep: Introducing the Mental Concept Reactivation Hypothesis of Sleep

Journal of Sleep Research, EarlyView.
ABSTRACT Sleep problems affect a substantial proportion of individuals, and negative thoughts, rumination, and worry are considered key factors underlying persistence and severity. While extensive research has examined how these states disrupt sleep before falling asleep, much less is known about how mental concepts, including thoughts, expectations ...
Anna Zoé Wick, Björn Rasch
wiley   +1 more source

Dynamic Modeling of 5-DOF Aerostatic Bearing Rotor System with Adjustable Gas Film Gap

Lubricants
In the application of an aerostatic motorized spindle, given the different requirements for the optimal gas film thickness of gas bearing under various processing conditions, this paper puts forward the tapered aerostatic bearing as the radial support ...
Shuo Jia, Chenhui Jia, Yanhui Lu
doaj   +1 more source

A Double‐Blind Randomised Controlled Crossover Trial of the Effect of Blue‐Enriched Ambient Light on Sleep in Older Adults With Sleep Disturbance: The CleverLights Study

Journal of Sleep Research, EarlyView.
ABSTRACT Light interventions have been investigated for treating sleep disturbances in older adults; however, findings are mixed. This proof‐of‐concept trial investigated the effect of blue‐enriched ambient light on electroencephalographic (EEG) sleep in older adults with self‐reported poor sleep.
Teha B. Pun, Craig L. Phillips, Nathaniel S. Marshall, Matthew Rahimi, Rick Wassing, Maria Comas, Angela L. D'Rozario, Camilla M. Hoyos, Delwyn J. Bartlett, Wenye Hu, Sharon L. Naismith, Sean Cain, Svetlana Postnova, Ronald R. Grunstein, Christopher J. Gordon   +14 more
wiley   +1 more source

Thermal displacement prediction of variable preload motorized spindles based on speed reduction experiments and IABC-BP optimization models

Case Studies in Thermal Engineering
The thermal error caused during the high-speed operation of a high-speed motorized spindle has a significant impact on machine tool precision. In this paper, we firstly built, constructed an experimental platform for variable voltage preloaded motorized ...
Ye Dai, Baolei Yu, Xueshi Tao, Xin Wang, Sai He, Gang Wang   +5 more
doaj   +1 more source

Understanding extracellular vesicles in antiaging

Periodontology 2000, EarlyView.
Abstract Background Aging is a multifactorial process marked by gradual cellular dysregulation, regulated by hallmarks, including genomic instability, mitochondrial dysregulation, and chronic inflammation. Extracellular vesicles (EVs), especially exosomes, have emerged as pivotal mediators of cell‐to‐cell communication with potential roles in both ...
Paras Ahmad, Nathan E. Estrin, Anton Sculean, Richard J. Miron   +3 more
wiley   +1 more source

Hypoxia and the cytoskeleton

The Journal of Physiology, EarlyView.
Abstract figure legend Schematic outlining the activation of hypoxia‐sensitive pathways, the influence of hypoxia and associated pathways on the cytoskeleton, and the impact of these on disease progression. Abstract A highly‐regulated and dynamic cytoskeleton is vital for functional cellular physiology and the maintenance of homeostasis.
Darragh Flood, Cormac T. Taylor
wiley   +1 more source

Thermal errors in high-speed motorized spindle: An experimental study and INFO-GRU modeling predictions

Case Studies in Thermal Engineering
As the accuracy requirements of machine tools increase, so do the accuracy requirements for electric spindles. Due to the compact internal structure of the spindle and poor heat dissipation, it is prone to serious thermal errors.
Zhaolong Li, Kai Zhao, Haonan Sun, Yongqiang Wang, Bangxv Wang, JunMing Du, Haocheng Zhang   +6 more
doaj   +1 more source