Results 41 to 50 of about 261,209 (317)

Monte Carlo modeling of radiation dose from radiation therapy with superficial x‐rays

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Introduction Superficial x‐rays (50–100 kVp) are used for treating non‐melanoma skin cancer and intraoperative radiation therapy (IORT). At these energies, the photoelectric effect significantly increases absorbed dose to bone compared to soft tissue.
Reham Barghash, Tiffany W. Martin, Amber R. Prebble, Del Leary   +3 more
wiley   +1 more source

Asymptotic behavior of a viscoelastic wave equation with a delay in internal fractional feedback [PDF]

Archives of Control Sciences
We consider the viscoelastic wave equation with a time delay term in internal fractional feedback. By employing the energy method along with the Faedo-Galerkin procedure, we establish the global existence of solutions, subject to certain conditions ...
Radhouane Aounallah, Adbelbaki Choucha, Salah Boulaaras, Abderrahmane Zarai   +3 more
doaj   +1 more source

NONMONOTONE CONVERGENCE AND RELAXING FUNCTIONS [PDF]

International Journal of Pure and Apllied Mathematics, 2013
In the minimization of real valued functions, Newton's algorithm is often combined with a line search method. Grippo et al (SIAM J. Numer. Anal., Vol. 23, No. 4) first suggested a nonmonotone stepsize selection rule based on the maximum of a fixed set of previous function values. In this pa- per we introduce the notion of relaxing functions and suggest
Melisa Hendrata, P.K. Subramanian
openaire   +2 more sources

Design and validation of a novel dosimetry phantom for motion management audits

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Background We present a novel phantom design for conducting end‐to‐end dosimetry audits for respiratory motion management of two anatomical treatment sites. The design enables radiochromic film measurements of the dose administered to the target throughout the respiratory cycle (motion‐included) and the dose delivered to the time‐averaged ...
Alex Burton, Sabeena Beveridge, Nicholas Hardcastle, Silvio Malfitana, Janaka Madamperuma, Rick Franich   +5 more
wiley   +1 more source

Rapid high resolution T1 mapping as a marker of brain development: Normative ranges in key regions of interest. [PDF]

PLoS ONE, 2018
ObjectivesWe studied in a clinical setting the age dependent T1 relaxation time as a marker of normal late brain maturation and compared it to conventional techniques, namely the apparent diffusion coefficient (ADC).Materials and methodsForty-two healthy
Sylvain Eminian, Steven David Hajdu, Reto Antoine Meuli, Philippe Maeder, Patric Hagmann   +4 more
doaj   +1 more source

Relaxation function of 3D XY model [PDF]

Physica B+C, 1977
Abstract The Method of Mori has been extended in an effort to study the relaxation function. The difficulty posed by continued fractions has been in some special cases overcome to obtain exact solutions for the relaxation function. The physical significance of our solution is discussed with aid of the XY model.
Lee, Mh, Dekeyser, Raf
openaire   +3 more sources

Cerebral autoregulation in patients with acute lacunar infarction: a reliable predictor of outcome

Annals of Clinical and Translational Neurology, EarlyView.
Abstract Objective To further investigate the association between dynamic cerebral autoregulation (dCA) and the outcomes in patients with acute lacunar infarction. Methods Patients were prospectively and consecutively enrolled at The First Hospital of Jilin University between 2016 and 2023. dCA was monitored at 1–3 and 7–10 days after the stroke.
Xiang‐Kun Si, Song Xue, Xin Zhou, Ya‐Nan Guo, Wen‐Yu Du, Yang Qu, Xin Sun, Zhen‐Ni Guo   +7 more
wiley   +1 more source

Energy decay in thermoelasticity type III with viscoelastic damping and delay term

Electronic Journal of Differential Equations, 2012
In this article, we consider a thermoelastic system of type III with a viscoelastic damping and internal delay. We use the multiplier method to prove, under suitable assumptions, general energy decay results from which the exponential and polynomial ...
Tijani A. Apalara, Salim A. Messaoudi, Muhammad I. Mustafa   +2 more
doaj  

The burden of intracranial atherosclerosis on cerebral small vessel disease: A community cohort study

Annals of Clinical and Translational Neurology, EarlyView.
Abstract Objective Exploring the prevalence and association between intracranial atherosclerosis (ICAS) and cerebral small vessel diseases (CSVD), this study delved beyond the current scope, utilising high‐resolution vessel wall MRI (HRVW‐MRI) to investigate how subtle changes in intracranial atherosclerotic features influence the various burdens of ...
Joseph Amihere Ackah, Heng Du, Wenjie Yang, Huixing Zeng, Jason Tsz Lok Chan, Michael Lung Cheung Lo, Xiangyan Chen   +6 more
wiley   +1 more source

Exponential decay of solutions to a fourth-order viscoelastic evolution equation in R^n

Electronic Journal of Differential Equations, 2010
In this article, we consider a Cauchy problem for a viscoelastic wave equation of fourth order. Under suitable conditions on the initial data and the relaxation function, we show that the rate of decay is exponential.
Mohammad Kafini
doaj