scholarly journals Causes and Consequences of Excess Resistance in Cryptobiotic Metazoans

2003 ◽  
Vol 76 (4) ◽  
pp. 429-435 ◽  
Author(s):  
K. Ingemar Jönsson
Keyword(s):  
Excess Resistance

Emitter excess resistance in GaAlAs/GaAs heterojunction bipolar transistors

1994 ◽  
Vol 37 (12) ◽  
pp. 1907-1911
Author(s):  
T. Camps ◽  
A. Marty ◽  
J. Tasselli ◽  
A. Cazarré ◽  
J.P. Bailbé
Keyword(s):  
Heterojunction Bipolar Transistors ◽  
Bipolar Transistors ◽  
Excess Resistance

scholarly journals The higher prevalence of extended spectrum beta-lactamases among Escherichia coli ST131 in Southeast Asia is driven by expansion of a single, locally prevalent subclone

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Swaine L. Chen ◽  
Ying Ding ◽  
Anucha Apisarnthanarak ◽  
Shirin Kalimuddin ◽  
Sophia Archuleta ◽  
...  
Keyword(s):  
Risk Factors ◽  
Escherichia Coli ◽  
Antibiotic Resistance ◽  
South America ◽  
Southeast Asia ◽  
Sequence Type ◽  
Beta Lactamases ◽  
Extended Spectrum Beta Lactamases ◽  
Mlst Type ◽  
Excess Resistance

Abstract The ST131 multilocus sequence type (MLST) of Escherichia coli is a globally successful pathogen whose dissemination is increasing rates of antibiotic resistance. Numerous global surveys have demonstrated the pervasiveness of this clone; in some regions ST131 accounts for up to 30% of all E. coli isolates. However, many regions are underrepresented in these published surveys, including Africa, South America, and Asia. We collected consecutive bloodstream E. coli isolates from three countries in Southeast Asia; ST131 was the most common MLST type. As in other studies, the C2/H30Rx clade accounted for the majority of ST131 strains. Clinical risk factors were similar to other reported studies. However, we found that nearly all of the C2 strains in this study were closely related, forming what we denote the SEA-C2 clone. The SEA-C2 clone is enriched for strains from Asia, particularly Southeast Asia and Singapore. The SEA-C2 clone accounts for all of the excess resistance and virulence of ST131 relative to non-ST131 E. coli. The SEA-C2 strains appear to be locally circulating and dominant in Southeast Asia, despite the intuition that high international connectivity and travel would enable frequent opportunities for other strains to establish themselves.

Electromagnetic and microstructural investigations of a naturally grown 8° [001] tilt bicrystal of Bi2Sr2CaCu208 + x

1996 ◽  
Vol 11 (4) ◽  
pp. 868-877 ◽  
Author(s):  
Jyh-Lih Wang ◽  
I-Fei Tsu ◽  
X. Y. Cai ◽  
R. J. Kelley ◽  
M. D. Vaudin ◽  
...  
Keyword(s):  
Tilt Boundary ◽  
Current Transport ◽  
Resistive Transition ◽  
Strongly Coupled ◽  
Partial Dislocations ◽  
Transmission Electron ◽  
Current Characteristics ◽  
Bulk Scale ◽  
Excess Resistance ◽  
Twist Boundaries

Electromagnetic characterization and high resolution transmission electron microscopy have been conducted on the same 8° [001] symmetrical (010) tilt boundary in a naturally grown, bulk-scale bicrystal of Bi2Sr2CaCu2O8 + x (BSCCO-2212). The resistive transition showed excess resistance above and below Tc, suggesting some weak coupling at the boundary, but the inter- and intragranular voltage-current characteristics, irreversibility fields, and critical current density (Jc) values were very similar and characteristic of strongly coupled grains and grain boundary. The misorientation was accommodated by a set of partial dislocations with the Frank spacing of 1.9 nm. The dislocation cores appeared to be separated by relatively undistorted regions of crystal. The Jc, values at 25 K exceeded 103 A/cm2 in fields of several tesla, more than two orders of magnitude larger than that found earlier in [001] twist boundaries of BSCCO-2212. This result is consistent with the view that low angle [001] till boundaries play an important role for current transport in polycrystalline BSCCO tapes.

scholarly journals Application of Schwarz–Christoffel mapping to the analysis of conduction through a slot

2015 ◽  
Vol 471 (2181) ◽  
pp. 20150292 ◽  
Author(s):  
Ehud Yariv ◽  
John D. Sherwood
Keyword(s):  
Current Density ◽  
Plate Thickness ◽  
Slow Decay ◽  
Slot Length ◽  
Conducting Plate ◽  
Implicit Equations ◽  
Generic Problem ◽  
Two Parameters ◽  
Christoffel Transformation ◽  
Excess Resistance

We consider the generic problem of steady conduction through a slot traversing a non-conducting plate that separates two semi-infinite conducting regions. The current-density field is conservative; the dimensionless problem governing its potential depends upon a single geometric parameter, h , the ratio of the slot length (i.e. the plate thickness) to its width. We construct a Schwarz–Christoffel transformation to handle this two-dimensional transport problem. The transformation is expressed in terms of two parameters which are related to h through two implicit equations; in the limit h →0, it becomes explicit. Because of the slow decay of the current density at large distances from the slot, the integral representing the slot resistance diverges. The excess resistance of a finite-length slot relative to that of a zero-length slot is, however, finite. This excess resistance depends only upon the asymptotic behaviour of the potential far from the slot; it may therefore be directly obtained as a function of the two transformation parameters. Asymptotic approximations are found for the excess resistance at small and large h , respectively, scaling as h ln ⁡ h and h . The single-slot solution is used to analyse conduction through a periodic array of widely spaced slots.

scholarly journals Characteristics of Land–Atmosphere Interaction Parameters over the Tibetan Plateau

2011 ◽  
Vol 12 (4) ◽  
pp. 702-708 ◽  
Author(s):  
Shuzhou Wang ◽  
Yaoming Ma
Keyword(s):  
Heat Transfer ◽  
Tibetan Plateau ◽  
Transfer Coefficient ◽  
Momentum Transfer ◽  
Roughness Length ◽  
The Tibetan Plateau ◽  
Transfer Coefficients ◽  
Bulk Transfer Coefficients ◽  
Resistance To Heat ◽  
Excess Resistance

Abstract In this study, eddy covariance flux data collected from three research stations on the Tibetan Plateau—Qomolangma for Atmospheric and Environmental Observation and Research, Nam Co for Multisphere Observation and Research, and Southeast Tibet Station for Alpine Environment Observation and Research, Chinese Academy of Sciences—are used to analyze the variation of momentum transfer coefficient (CD), heat transfer coefficient (CH), aerodynamic roughness length (z0m), thermal roughness length (z0h), and excess resistance to heat transfer (kB−1, where k is von Kármán’s constant and B−1 is a non-dimensional bulk parameter). The following results are found. The monthly average surface roughness, bulk transfer coefficient, and excess resistance to heat transfer at all three stations are obtained. The values of average heat bulk transfer coefficients are larger than those of average momentum bulk transfer coefficients at all three stations. The parameter kB−1 exhibits clear diurnal variations with lower values in the night and higher values in the daytime, especially in the afternoon. Negative values of kB−1 are often observed in the night for relatively smooth surfaces on the Tibetan Plateau, indicating that heat transfer efficiency may exceed that of momentum transfer.

scholarly journals Excess resistance effect in a normal metal contacting a superconductor

1996 ◽  
Vol 218 (1-4) ◽  
pp. 134-137 ◽  
Author(s):  
A. Kadigrobov ◽  
R. Shekhter ◽  
M. Jonson
Keyword(s):  
Normal Metal ◽  
Excess Resistance

Excess resistance of bog surfaces in central Sweden

2002 ◽  
Vol 112 (1) ◽  
pp. 23-30 ◽  
Author(s):  
Meelis Mölder ◽  
Erik Kellner
Keyword(s):  
Excess Resistance

scholarly journals Sample size dependence of excess resistance near critical field in mesoscopic superconducting Al disk

2009 ◽  
Vol 150 (2) ◽  
pp. 022022 ◽  
Author(s):  
A Harada ◽  
K Enomoto ◽  
T Yakabe ◽  
M Kimata ◽  
K Hazama ◽  
...  
Keyword(s):  
Sample Size ◽  
Critical Field ◽  
Size Dependence ◽  
Excess Resistance
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