Results 91 to 100 of about 8,855,165 (345)

A rarefaction-tracking method for hyperbolic conservation laws

open access: yes, 2009
We present a numerical method for scalar conservation laws in one space dimension. The solution is approximated by local similarity solutions. While many commonly used approaches are based on shocks, the presented method uses rarefaction and compression ...
A Harten   +22 more
core   +1 more source

A Comparative Study of Cerebral Oxygenation During Exercise in Hemodialysis and Peritoneal Dialysis Patients

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Cognitive impairment and exercise intolerance are common in dialysis patients. Cerebral perfusion and oxygenation play a major role in both cognitive function and exercise execution; HD session per se aggravates cerebral ischemia in this population. This study aimed to compare cerebral oxygenation and perfusion at rest and in mild
Marieta P. Theodorakopoulou   +10 more
wiley   +1 more source

Sparse Macro-track Transport Acceleration Method for 3-D Pebble-bed Geometry

open access: yesYuanzineng kexue jishu
The method of characteristics has very strong geometric adaptability and can be used to solve the 3-D whole core problem of high temperature gas-cooled pebble-bed reactor.
GUO Jian1, GUO Jiong2, LI Fu2, YAN Rui1, ZOU Yang1
doaj   +1 more source

Modeling Light-Extraction Characteristics of Packaged Light-Emitting Diodes [PDF]

open access: yes, 1998
We employ a Monte Carlo ray-tracing technique to model light-extraction characteristics of light-emitting diodes. By relaxing restrictive assumptions on photon traversal history, our method improves upon available analytical models for estimating light ...
McGill, T. C., Ting, D. Z.-Y.
core  

Predicting the Future Burden of Renal Replacement Therapy in Türkiye Using National Registry Data and Comparative Modeling Approaches

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Chronic kidney disease is a growing public health problem worldwide, and the number of patients requiring renal replacement therapy is steadily increasing. Türkiye has experienced a similar rise in both the incidence and prevalence of renal replacement therapy over the past decades; however, national‐level projections of future ...
Arzu Akgül   +2 more
wiley   +1 more source

ANN-MoC Method for Inverse Transient Transport Problems in One-Dimensional Domain

open access: yesLatin-American Journal of Computing
Transport problems of neutral particles have important applications in engineering and medical fields, from safety and quality protocols to optical medical procedures.
Nelson Garcia Roman   +2 more
doaj  

Determination of two-stroke engine exhaust noise by the method of characteristics [PDF]

open access: yes
A computational technique was developed for the method of characteristics solution of a one-dimensional flow in a duct as applied to the wave action in an engine exhaust system.
Brown, G. L., Jones, A. D.
core   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

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