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Lead-phase and red-stripe color morphs of red-backed salamanders Plethodon cinereus differ in hematological stress indices:A consequence of differential predation pressure?

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Current Zoology 2010年第2期56卷 238-243页

作者： Andrew K.davis Joseph r.MILANOVICH D.B. Warnell School of Forestry and Natural resources The University of Georgia

Throughout the animal kingdom there are species that have two or more phenotypic forms or ‘morphs＇, and many of these are amphibians. In North America, the red-backed salamander Plethodon cinereus can have either a red dorsal stripe or no dorsal stripe （lead-phase form）, and evidence to date indicates the lead-phase form incurs a greater number of attacks from predators. In a recent collection of 51 P cinereus, blood smears of both color morphs （35 red-stripe, 16 lead-phase） were examined to obtain numbers of circulating leukocytes （via light microscopy）, which can be used to indirectly estimate levels of stress hormones in vertebrates via a ‘hematological stress index＇, which is the ratio between the number of two leukocyte types （neutrophils and lymphocytes）. Our results showed that lead-phase salamanders tended to have greater numbers of circulating neutrophils and lower numbers of circulating lymphocytes than red-stripe morphs, leading to higher average neutrophil-lymphocyte ratios in lead-phase individuals. Since the salamanders were held （refrigerated） for 7 days before sampling, we cannot be certain if this effect is a stress reaction to the captivity or the normal level for this morph. However comparison with two sets of related salamanders that were captured and sampled immediately indicates the red-stripe salamanders were either not stressed from the captivity at all, or their white blood cell distributions had returned to normal after 7 days of captivity. Taken together, our results indicate that lead-phase forms of P. cinereus have higher stress levels than the red-stripe forms, which may be a consequence of their higher exposure to, and/or attacks from, predators. They may also indicate that the lead-phase form is less-suited to captivity than the red-stripe form of this species.

关键词： red-backed salamander Plethodon cinereus Color polyrnorphism Hematological stress index Corticosterone

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通用汽车想为车载系统另起炉灶

商业周刊（中文版） 2024年第7期 56-61页

作者： AUSTIN CArr DAVID WELCH ArIEL davis(图) 汪泽(译) 不详

2024款雪佛兰开拓者EV(Chevrolet Blazer EV)是迈克尔·沃尔德伦(Michael Waldron)拥有过的最漂亮的座驾。他去年11月购买了这辆6.2万美元的电动SUV,深深地迷上了它的“炫红”色彩,丝滑流畅的加速以及豪华的内饰,简洁的显示屏排列在仪... 详细信息

2024款雪佛兰开拓者EV(Chevrolet Blazer EV)是迈克尔·沃尔德伦(Michael Waldron)拥有过的最漂亮的座驾。他去年11月购买了这辆6.2万美元的电动SUV,深深地迷上了它的“炫红”色彩,丝滑流畅的加速以及豪华的内饰,简洁的显示屏排列在仪表盘上。只是少了一样重要事物:苹果公司(Apple)的CarPlay。

关键词：车载系统仪表盘座驾通用汽车内饰 SUV 苹果公司沃尔德

COMPUTATIONAL ISSUES IN SENSITIVITY ANALYSIS FOr 1-D INTErFACE PrOBLEMS

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Journal of Computational Mathematics 2011年第1期29卷 108-130页

作者： Lisa G. davis John r. Singler Montana State University Department of Mathematical Sciences PO Box 172400 Bozeman MT 59717-2400 USA Missouri University of Science and Technology Department of Mathematics and Statistics 300 W. 12th St. Rolla MO 65409 0020 USA

This paper is concerned with the construction of accurate and efficient computational algorithms for the numerical approximation of sensitivities with respect to a parameter dependent interface location. Motivated by sensitivity analysis with respect to piezoelectric actuator placement on an Euler-Bernonlli beam, this work illustrates the key concepts related to sensitivity equation formulation for interface problems where the parameter of interest determines the location of the interface. A fourth order model problem is considered, and a homogenization procedure for sensitivity computation is constructed using standard finite clement methods. Numerical results show that proper formulation and approximation of the sensitivity interface conditions is critical to obtaining convergent numerical sensitivity approximations. A second order elliptic interface model problem is also mentioned, and the homogenization procedure is outlined briefly for this model.

关键词： Finite element method Interface Problems Sensitivity Equation.

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Mycetismus:a review

Gastroenterology report 2016年第2期4卷 107-112,I0001页

作者： Michael r.Smith robert L.davis Department of Surgery St.Barnabas HospitalBronxNYUSA Department of Surgery Lutheran Medical CenterBrooklynNYUSA

Although rare,death from amanitin exposure poses a significant health risk and a diagnostic challenge to the clinician due to its *** is one of the few conditions to be voluntarily reported by healthcare *** antidote exists for this poisoning and,perhaps due to its rarity or lack of attention,the United States has lagged behind Europe for almost three decades in treatment,diagnostics and *** regrettable fact warrants the formation of a centralized agency for education,the advancement of research and the collection of data,to provide better treatment for the population.

关键词： amanita phalloides mushroom poisoning amatoxin amanitin vitamin C cimetidine silibinin N-acetylcysteine liver transplantation Ganzert criteria King’s College criteria mycetismus Clichy criteria

The Quantum Consistency of the Ten-Dimensional Heterotic String Effective Action

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Communications in Theoretical Physics 2011年第5期55卷 857-862页

作者： Simon davis research Foundation of Southern California

The finiteness of superstring theory at each order in perturbation theory is considered with respect to the ten-dimensional effective action. The quantum consistency of the ten-dimensional superstring effective action is confirmed with an analysis of the perturbative expansion of the quartic sector. It is found to be compatible with the finiteness of reduced four-dimensional theory. Furthermore, implications for the validity of superstring perturbation theory at lower energies is considered.

关键词： effective action gauge potential renormalizability

LIQUID-GAS TWO PHASE FLOW rATES METErING BY DUAL PrESSUrE DIFFErENTIAL MEASUrEMENTS

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Journal of Hydrodynamics 1994年第3期6卷 85-96页

作者： M.r.davis Dept of Civil and Mechanical Engineering University of TasmaniaG.P.O.Box 252cHobartTasmania 7001Australia

The measurement of the overall mass flow rates in a two phase, gas/liquid pipeline is considered on the basis of dual pressure differential measurements for a combined contraction/frictional pipe type of flow meter and a numerical model to predict overall mass flow rates from pressure differentials measured from this type of flow meter is presented. The experiments generally conform with the predictions of the flow rates prediction model. Whilst the practicability of such metering of two phase flows is clearly demonstrated, application of the method would require careful calibration to allow for the influence of nozzle coefficients, pipe reynolds number and void fraction upon the one dimensional compressible flow equations through wall friction factor and interphase slip effects.

关键词： two phase flow measurement pressure differential.

Univalent Functions and Diff(S^1)/S^1

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Acta Mathematica Sinica,English Series 2012年第6期28卷 1233-1236页

作者： Simon davis research Foundation of Southern California

The relation between Diff（S^1）/S^1 and the space of univalent analytic functions on the disk is elucidated and shown to provide upper bounds for the volumes of exhaustive approximations to an analytic submanifold of an infinite-dimensional space. The maximum magnitudes of the coefficients in the series expansions of univalent superanalytic functions on the superdisk are inferred.

关键词： Univalent diffeomorphism group superanalytic functions

Holomorphic Factorization of Superstring Scattering Amplitudes

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Communications in Theoretical Physics 2011年第1期55卷 1-5页

作者： Simon davis research Foundation of Southern Califoria

The holomorphic factorization of the superstring partition function is verified at arbitrary genus. The evaluation of scattering amplitudes and the implications of genus-dependent estimates on the string coupling are ... 详细信息

关键词： holomorphic factorization ramond measure supermoduli space coordinate

Discrete composition control of two-dimensional morphologic all-inorganic metal halide perovskite nanocrystals

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Journal of Energy Chemistry 2021年第8期30卷 257-275,I0006页

作者： Andrew Hunter davis Weiwei Zheng Department of Chemistry Syracuse University13244 SyracuseUnited States

Metal halide perovskite nanocrystals(NCs)exhibit impressive optical and electronic properties,making them an important class of functional materials with promising applications in solar cells,light emitting diodes(LEDs),photodetectors,and *** addition to the widely studied 0-dimensional(0 D)metal halide perovskite NCs,such as nanocubes,low dimensional perovskites,such as 2 D all-inorganic perovskite(AIP)NCs,subsist with directionally relevant quantum *** anisotropic NCs have the propensity to exhibit interesting optoelectronic properties that are exceedingly difficult to introduce into 0 D systems,yet as of late are largely *** this review,we discuss the recent synthetic progress of 2 D all-inorganic metal halide perovskite NCs with ABX3 ***,we highlight the discrete composition control of the cations(A and B sites)and anions(X site)by dopant incorporation and alloying in 2 D metal halide perovskite *** will also discuss more complex perovskite crystal structures,such as ruddlesden-Popper double perovskites,and compare these materials to 0 D perovskite ***,our work culminates in the future interests and perspectives of this field with a focus on the wide applicability of 2 D systems and the large variance in structure capable with discrete compositional tuning.

关键词： All-inorganic perovskites Two-dimensional nanocrystals Composition Doping Alloying Ion exchange