Now showing items 25-44 of 263

• #### Causality, 'superluminality', and reshaping in undersized waveguides ﻿

(2012-12-31)
We analyse the reshaping mechanism leading to apparently 'superluminal' advancement of a pulse traversing an undersized section of a waveguide. For frequencies below the first inelastic threshold (cut off one), there are ...
• #### Chemical-garden formation, morphology, and composition. I. Effect of the nature of the cations ﻿

(2011-12-31)
We have grown chemical gardens in different sodium silicate solutions from several metal-ion salts-calcium chloride, manganese chloride, cobalt chloride, and nickel sulfate-with cations from period 4 of the periodic table. ...
• #### Chemical-garden formation, morphology, and composition. II. Chemical gardens in microgravity ﻿

(2011-12-31)
We studied the growth of metal-ion silicate chemical gardens under Earth gravity (1 g) and microgravity (μg) conditions. Identical sets of reaction chambers from an automated system (the Silicate Garden Habitat or SGHab) ...
• #### Chemoinformatic-guided engineering of polyketide synthases ﻿

(2019)
Polyketide synthase (PKS) engineering is an attractive method to generate new molecules such as commodity, fine and specialty chemicals. A central challenge in PKS design is replacing a partially reductive module with a ...
• #### Chronic stimulation induces adaptive potassium channel activity that restores calcium oscillations in pancreatic islets in vitro ﻿

(2020-04-01)
Insulin pulsatility is important to hepatic response in regulating blood glucose. Growing evidence suggests that insulin-secreting pancreatic β-cells can adapt to chronic disruptions of pulsatility to rescue this physiologically ...
• #### Classification of bursting patterns: A tale of two ducks ﻿

(2022-01-20)
Bursting is one of the fundamental rhythms that excitable cells can generate either in response to incoming stimuli or intrinsically. It has been a topic of intense research in computational biology for several decades. ...
• #### Classification of resonance Regge trajectories and a modified Mulholland formula ﻿

(2011-12-31)
We employ a simple potential model to analyze the effects which a Regge trajectory, correlating with a bound or a metastable state at zero angular momentum, has on an integral cross section. A straightforward modification ...
• #### Clinical correlates of mathematical modeling of cortical spreading depression: Single‐cases study ﻿

(2019-07-28)
Introduction: Considerable connections between migraine with aura and cortical spreading depression (CSD), a depolarization wave originating in the visual cortex and traveling toward the frontal lobe, lead to the hypothesis ...
• #### Coarse-graining RNA nanostructures for molecular dynamics simulations ﻿

(2010-12-31)
A series of coarse-grained models have been developed for study of the molecular dynamics of RNA nanostructures. The models in the series have one to three beads per nucleotide and include different amounts of detailed ...
• #### Combining stochastic and deterministic approaches within high efficiency molecular simulations ﻿

(2013-12-31)
Generalized Shadow Hybrid Monte Carlo (GSHMC) is a method for molecular simulations that rigorously alternates Monte Carlo sampling from a canonical ensemble with integration of trajectories using Molecular Dynamics (MD). ...
• #### Common principles and best practices for engineering microbiomes ﻿

(2019)
Despite broad scientific interest in harnessing the power of Earth's microbiomes, knowledge gaps hinder their efficient use for addressing urgent societal and environmental challenges. We argue hat structuring research ...
• #### Comparative analysis of different methods of modeling the thermal effect of circulating blood flow during RF cardiac ablation ﻿

(2016-01-01)
Our aim was to compare the different methods of modeling the effect of circulating blood flow on the thermal lesion dimensions created by radio frequency (RF) cardiac ablation and on the maximum blood temperature. Computational ...
• #### Complex angular momentum theory of state-to-state integral cross sections: Resonance effects in the $F + HD \to HF(v' = 3) + D$ reaction ﻿

(2015-12-31)
State-to-state reactive integral cross sections (ICSs) are often affected by quantum mechanical resonances, especially near a reactive threshold. An ICS is usually obtained by summing partial waves at a given value of ...
• #### Complex systems in finance: Monte Carlo evaluation of first passage time density functions ﻿

(2010-12-31)
Many examples of complex systems are provided by applications in finance and economics areas. Some of intrinsic features of such systems lie with the fact that their parts are interacting in a non-trivial dynamic manner ...
• #### Computational Analysis of Pulsed Radiofrequency Ablation in Treating Chronic Pain ﻿

(2019-06)
In this paper, a parametric study has been conducted to evaluate the effects of frequency and duration of the short burst pulses during pulsed radiofrequency ablation (RFA) in treating chronic pain. Affecting the brain and ...
• #### Computational aspects of Monte-Carlo simulations of the first passage time for multivariate transformed Brownian motions with jumps ﻿

(2013-12-31)
Many problems in science, engineering, and finance require the information on the first passage time (FPT) of a stochastic process. Mathematically, such problems are often reduced to the evaluation of the probability density ...
• #### Computational Model for Prediction of the Occurrence of Steam Pops during Irrigated Radiofrequency Catheter Ablation ﻿

(2016)
Radiofrequency catheter ablation (RFCA) is a curative treatment for cardiac arrhythmias. Although globally a pretty safe procedure, it may present some risk. Steam pop is a serious complication that can occur during RFCA ...
• #### A computational model integrating brain electrophysiology and metabolism highlights the key role of extracellular potassium and oxygen ﻿

(2018-02-26)
The human brain is a small organ which uses a disproportional amount of the total metabolic energy pro- duction in the body. While it is well understood that the most significant energy sink is the maintenance of the ...
• #### A computational model of open-irrigated radiofrequency catheter ablation accounting for mechanical properties of the cardiac tissue ﻿

(2018)
Radiofrequency catheter ablation (RFCA) is an effective treatment for cardiac arrhythmias. Although generally safe, it is not completely exempt from the risk of complications. The great flexibility of computational models ...
• #### Computational modeling of open-irrigated electrodes for radiofrequency cardiac ablation including blood motion-saline flow interaction ﻿

(2016)
Radiofrequency catheter ablation (RFCA) is a routine treatment for cardiac arrhythmias. During RFCA, the electrode-tissue interface temperature should be kept below 80°C to avoid thrombus formation. Open-irrigated electrodes ...