In this paper we estimate the required pulse parameters for the future application of x-ray free electron lasers to imaging single biological molecules. The parameters are determined by a tradeoff between minimizing image degradation due to damage and maximizing the image signal-to-noise ratio. We discuss several means to alleviate the pulse requirements, and compare the requirements with parameters of two planned x-ray lasers.
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http://dx.doi.org/10.1103/PhysRevE.71.061919 | DOI Listing |
Ann Noninvasive Electrocardiol
March 2025
Department of Cardiology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.
Background: Neurally mediated syncope (NMS) is the primary cause of temporary and self-limiting loss of consciousness. The tilt table test (TTT) has been consistently employed as a supplementary diagnostic tool for syncope evaluation. However, TTT requires specialized equipment, which is lacking in several emergency room and clinic environments.
View Article and Find Full Text PDFJ Sleep Res
January 2025
Department of Biomedical Engineering, Soonchunhyang University, Asan, Chungnam, Republic of Korea.
The aim of this study was to determine whether closed-loop vibration stimulation, delivered at +3% of the heart rate frequency at an imperceptible intensity before waking, could reduce sleep inertia. Participants napped on a bed equipped with a woofer that delivered vibration stimulation every 5 min, starting 30 min before their scheduled wake time. The effects of the stimulation were assessed using a Psychomotor Vigilance Task performed immediately upon waking, along with the analysis of salivary cortisol and melatonin levels, as well as subjective arousal ratings based on the Karolinska Sleepiness Scale and the Stanford Sleepiness Scale.
View Article and Find Full Text PDFAdv Mater
January 2025
Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
Omnidirectional strain sensing and direction recognition ability are features of the human tactile sense, essential to address the intricate and dynamic requirements of real-world applications. Most of the current strain sensors work by converting uniaxial strain into electrical signals, which restricts their use in environments with multiaxial strain. Here, the first device with simultaneous isotropic omnidirectional hypersensitive strain sensing and direction recognition (IOHSDR) capabilities is introduced.
View Article and Find Full Text PDFActa Anaesthesiol Scand
March 2025
Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, Delhi, India.
Background: Pharmacokinetics and sedative effects of sublingual dexmedetomidine have not been established in children. The primary aim was to compare peak plasma concentration, time to reach peak plasma concentration and area under the curve with 2 μg/kg sublingual and intranasal dexmedetomidine. The secondary aims were to compare the depth of sedation, parental separation anxiety, mask acceptance, heart rate changes, analgesic requirements and recovery time with 2 μg/kg sublingual and intranasal dexmedetomidine in children.
View Article and Find Full Text PDFCatheter Cardiovasc Interv
January 2025
Department of Pediatrics, Division of Cardiology, The Children's Hospital of Philadelphia, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA.
Background And Aims: Drug-eluting stents (DES) are not designed for overexpansion to supra-nominal diameters or intentional stent fracture (ISF). The optimal dilation technique to minimize stent shortening (SS) and achieve ISF to accommodate pediatric somatic growth has not been described.
Methods: Three sizes of two commonly used DES were implanted within a silicone model to simulate blood vessels.
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