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Breather-induced anomalous charge diffusion

G. Kalosakas, K. L. Ngai, S. Flach
2005 Physical Review E  
We present results on the diffusive motion of a charge interacting with the nonlinear dynamics of a thermalized underlying lattice. Signatures of anomalous diffusive properties are found at relatively high temperatures, where highly nonlinear excitations are present. A sublinear diffusion and a plateau appear before the standard long-time diffusion during the evolution of the mean-squared displacement and a significant degree of heterogeneity is exhibited among individual trajectories. Both
more » ... erties are connected with the existence of vibrational hot spots ͑breather or multibreather excitations͒. Transport parameters of the charge are strongly affected in this case, as can be exemplified by the significant suppression of the diffusion coefficient D. The variation of D with temperature follows a stretched exponential law. The results are contrasted with those of the linearized case, in the absence of breathers. Such anomalous diffusion of a charge coupled to a thermalized lattice may be relevant in low-dimensional soft materials with strong anharmonicities, such as biomolecules, conducting polymers, etc.
doi:10.1103/physreve.71.061901 pmid:16089759 fatcat:ckrk53lvyfgzdobnmsgxcyxn7y

Unbounded Disjointness Preserving Linear Functionals

Lawrence G. Brown, Ngai-Ching Wong
2004 Monatshefte für Mathematik (Print)  
and ϕ(g) must be zero.  ...  For each bounded sequence y = (y n ) in ∞ , define g y by g y | V n = y n f | V n for n = 1, 2, . . ., and g y | X\V = 0.  ... 
doi:10.1007/s00605-003-0045-2 fatcat:ihu63qm2nvgqrafdjlqfclwkqe

PESD Carbon Storage Project Database

Varun Rai, Ngai-Chi Chung, Mark C. Thurber, David G. Victor
2008 Social Science Research Network  
David G.  ...  Thurber and David G. Victor Introduction Carbon capture and storage (CCS) is among the technologies with greatest potential leverage to combat climate change.  ... 
doi:10.2139/ssrn.1400118 fatcat:ivefpkcamvek5pjd3xotxcvwo4

Phase-sensitive imaging of ferromagnetic resonance using ultrafast heat pulses [article]

Feng Guo, J. M. Bartell, D. H. Ngai, G. D. Fuchs
2015 arXiv   pre-print
The red curves in (f) and (g) are the fits for ferromagnetic resonance.  ...  The images of current phase (g) and normalized current intensity (h) are reconstructed from (c) and (f).  ... 
arXiv:1507.02303v1 fatcat:7t26a4sohnesnfrotyx6as3qli

Interplay between the heterotrimeric G-protein subunits Gαq and Gαi2 sets the threshold for chemotaxis and TCR activation

Jacob Ngai, Marit Inngjerdingen, Torunn Berge, Kjetil Taskén
2009 BMC Immunology  
The heterotrimeric G proteins G αq and G αi2 have been implicated in CXCR4-signaling and we have recently also reported the possible involvement of G αq in TCR-dependent activation of Lck (Ngai et al.,  ...  Here we examined the role of G αq in migration and TCR activation.  ...  Jacob Ngai is a fellow of the Norwegian Cancer Society.  ... 
doi:10.1186/1471-2172-10-27 pmid:19426503 pmcid:PMC2694176 fatcat:32y6udr2zbal7bppyxumw4rvqy

Applying Coordination for Service Adaptation in Mobile Computing

Yongjie Zheng, A.T.S. Chan, G. Ngai
2006 IEEE Internet Computing  
Mobile computing devices vary in terms of display, memory, and battery life, and current network protocols aren't necessarily suited to the mobile computing environment. As computer networks' complexity increases,communication-related software must be able to adapt to mobile computing's constraints. This study aims to develop a software system that adapts data flows over dynamic wireless network conditions and various mobile devices. With their MobiGATE system,the authors adopt the principle of
more » ... separation of concerns to support the system's service composition and reconfiguration.This approach can support ease of dynamic reconfiguration and the reusability of adaptation services across applications.
doi:10.1109/mic.2006.93 fatcat:xv5v5ucew5avhoregi2ps4fgbu

Effect of isokinetic training on shoulder impingement

T.L. Wang, B.M. Fu, G. Ngai, P. Yung
2014 Genetics and Molecular Research  
The aim of this study was to review the literature evaluating the effect of isokinetic training in patients suffering from shoulder impingement syndrome (SIS). Studies published up to March 2011 were located from the Pubmed, Scopus, Lilacs, Physiotherapy Evidence Database, and Cochrane Library databases using "isokinetic", "shoulder", and "impingement" as key words. Referenced studies were also checked. Studies were included if isokinetic training was employed as at least one of the treatments
more » ... n the therapeutic program to treat shoulder impingement or other shoulder pathologies leading to impingement-related pain. All eligible studies described the level of evidence, patient characteristics, interventions, outcome evaluation, results, complications, and return to work. There were 2 randomized control trials (RCTs) and 4 studies with level 4 evidence that met the inclusion criteria. All of the studies included showed a statistically or clinically significant outcome after isokinetic training. However, most of the studies could not identify the isolated effect of isokinetic training. There was not enough evidence to support or refute the effectiveness of isokinetic training for SIS. This result does not reflect a true lack ©FUNPEC-RP Genetics and Molecular Research 13 (1): 744-757 (2014) Isokinetic training on shoulder impingement of effect, but rather a lack of RCTs. A consensus definition of the different types and stages of SIS is urgently needed. More RCTs are also essential to clarify the value of this technique. The homogeneity of treatment interventions, study populations, and outcome measures should be prioritized. Further studies are also needed to clarify the differences in isokinetic data across different types and stages of shoulder impingement.
doi:10.4238/2014.january.31.1 pmid:24615039 fatcat:nkrz5hxclnapnjyp3gurm3d3pe

Transitioning to confined spaces impacts bacterial swimming and escape response [article]

Jonathan B. Lynch, Nicholas James, Margaret McFall-Ngai, Edward G. Ruby, Sangwoo Shin, Daisuke Takagi
2021 bioRxiv   pre-print
minutes at 28 o C; these cells were pelleted at 8000 x g for 5 min.  ...  For experimental conditions, individual colonies of GFP-labelled V. fischeri were placed in 1 mL of SWT medium (70% ocean water, 5 g L -1 tryptone, 3 g L -1 yeast extract, 32.5 mM glycerol (51)) for 90  ... 
doi:10.1101/2021.09.15.460467 fatcat:7ekygnd3hjdvfghlyuahmuoyqe

Postischemic Augmentation of Conducted Dilation in Cerebral Arterioles

A. C. Ngai, T.-S. Nguyen, J. R. Meno, G. W. Britz
2006 Stroke  
Male Sprague Dawley rats (Charles River Laboratory; Wilmington, Mass; body weight, 300 to 350 g, nϭ38) were anesthetized by spontaneous inhalation of 1.5% halothane in a 30% oxygen/70% air mixture.  ... 
doi:10.1161/01.str.0000252157.93998.47 pmid:17122418 fatcat:itzt2zi4urdydf3supkixzr7ha

Left quotients of a C*-algebra, III: Operators on left quotients

Lawrence G. Brown, Ngai-Ching Wong
2013 Studia Mathematica  
LAWRENCE G. BROWN AND NGAI-CHING WONG Then p is a closed projection in A * * . Let x = (x n ) ∈ A * * with x n = a n b n c n d n , n = 1, 2, . . . , and x ∞ = a 0 0 d .  ...  In a similar manner, we can choose another continuous real-valued function g on σ(a) such that f g = g = 0. Let x = f (a) and y = g(a). We have x, y ∈ A and xy = y = 0.  ... 
doi:10.4064/sm218-3-1 fatcat:q3x2smecbzd7bphpajwy673m4a

The repertoire of olfactory C family G protein-coupled receptors in zebrafish: candidate chemosensory receptors for amino acids

Tyler S Alioto, John Ngai
2006 BMC Genomics  
Vertebrate odorant receptors comprise at least three types of G protein-coupled receptors (GPCRs): the OR, V1R, and V2R/V2R-like receptors, the latter group belonging to the C family of GPCRs.  ...  The mouse and rat genomes each encode approximately 60 V2R genes [18] ; these receptors are expressed in the subclass of G αo -expressing neurons in a pattern complementary to V1R/G αi expression [15  ...  The V1R receptors are expressed within the subpopulation of G αi -expressing VNO sensory neurons [14] .  ... 
doi:10.1186/1471-2164-7-309 pmid:17156446 pmcid:PMC1764893 fatcat:pox6e7exjbccxjceng5us4m27e

The application of the energy landscape model to polymers

C. M. Roland, P. G. Santangelo, K. L. Ngai
1999 Journal of Chemical Physics  
Ngai, Macromolecules 24, 1222 ͑1991͒.  ...  Phys., Vol. 111, No. 12, 22 September 1999 Roland, Santangelo, and Ngai C. A. Angell, J. Non-Cryst. Solids 131-133, 13 ͑1991͒. 2 C. A. Angell, Science 267, 1924 ͑1995͒. 3 D. J. Plazek and K. L.  ... 
doi:10.1063/1.479861 fatcat:d3bwwk2ddfenrhlziq7ofutqly

Phase-Sensitive Imaging of Ferromagnetic Resonance Using Ultrafast Heat Pulses

Feng Guo, J. M. Bartell, D. H. Ngai, G. D. Fuchs
2015 Physical Review Applied  
The red curves in (f) and (g) are the fits for ferromagnetic resonance.  ...  All the data shown in (e-g) are the mixed signals locked into the chopping reference (V chop ) and the field modulating reference (V mod ). Examples of measured spectra are shown in Figs. 1(e-g).  ... 
doi:10.1103/physrevapplied.4.044004 fatcat:dtc4jpz5q5bzfg2extuwgb53ja

Features governing symbiont persistence in the squid-vibrio association

Eric J. Koch, Tim Miyashiro, Margaret J. McFall-Ngai, Edward G. Ruby
2013 Molecular Ecology  
, 5 g yeast extract, and 20 g NaCl.  ...  NaCl, 5 g Bacto-Tryptone, and 3 g yeast extract (Bose et al. 2008) .  ... 
doi:10.1111/mec.12474 pmid:24118200 pmcid:PMC3907463 fatcat:zowhvd3arzho3ng2dovhmevyom
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