A model is presented for thermal convection in an inclined layer of porous material when the medium has a bidispersive structure. Thus, there are the usual macropores which are full of a fluid, but there are also a system of micropores full of the same fluid. The model we employ is a modification of the one proposed by Nield & Kuznetsov (2006 , 3068-3074. (doi:10.1016/j.ijheatmasstransfer.2006.02.008)), although we consider a single temperature field only.
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http://dx.doi.org/10.1098/rspa.2016.0480 | DOI Listing |
Magn Reson Imaging
January 2025
Institute of Fluid Mechanics, University of Rostock, Rostock, Germany.
Purpose: To improve the current method for MRI turbulence quantification which is the intravoxel phase dispersion (IVPD) method. Turbulence is commonly characterized by the Reynolds stress tensor (RST) which describes the velocity covariance matrix. A major source for systematic errors in MRI is the sequence's sensitivity to the variance of the derivatives of velocity, such as the acceleration variance, which can lead to a substantial measurement bias.
View Article and Find Full Text PDFClin Imaging
January 2025
NYU Langone Health, Department of Radiology, 660 1st Ave, New York, NY 10016, United States.
Purpose: Though prior studies have proven CTC's efficacy in outpatients, its utility in the inpatient setting has not been studied. We evaluated the efficacy of a modified CTC protocol in the inpatient setting, primarily for patients awaiting organ transplantation.
Methods: This retrospective study compared a group of inpatient CTCs from 2019 to 2021 and a randomly selected, age-matched 2:1 control group of outpatient CTCs.
Micromachines (Basel)
January 2025
Faculty for the Built Environment, University of Malta, MSD 2080 Msida, Malta.
This paper highlights the optimisation of a key design parameter essential to the development of PMUTs, which are part of the transmitting components of microsensors. These microsensors are designed for use in the Structural Health Monitoring of reinforced concrete structures. Enhancing the effectiveness of the transmitting component allows for greater spacing between microsensors, which in turn reduces the number of devices needed to implement a full structural health monitoring system.
View Article and Find Full Text PDFHealthcare (Basel)
January 2025
Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Grattan St., Melbourne, VIC 3010, Australia.
Background/objectives: Early-onset sepsis in neonates is a potentially catastrophic condition that demands prompt management. However, laboratory diagnosis via cerebral spinal fluid and blood tests is often inconclusive, so diagnosis on the basis of clinical symptoms and risk factors is frequently required, and the majority of neonates treated with antibiotics for presumed early-onset sepsis (PEOS) do not have culture-proven sepsis. The management of such PEOS is mainly achieved via antibiotic therapy, which itself has adverse effects, creating a dilemma for clinicians in optimising healthcare.
View Article and Find Full Text PDFTransplant Cell Ther
January 2025
Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Emory University; Atlanta, GA, USA.
While highly morbid forms of chronic graft versus host disease (cGVHD) and severe late effects of allogeneic hematopoietic cell transplant (HCT) can impact children and adults alike, unique considerations arise in pediatric cases regarding diagnosis, monitoring, treatment, and likelihood of resolution. As children can present with atypical features of cGVHD, and with more significant disease due to inability to communicate symptoms, they may be at increased risk for highly morbid forms of cGVHD and incur greater subsequent late effects, which may be more pronounced in those with underlying chromosomal breakage syndromes, with higher prevalence in pediatric HCT recipients. The long-term effects of cGVHD and its therapies include impaired immune reconstitution, leading to increased risks of infection and secondary malignant neoplasms.
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