6,989 research outputs found
Area contraction for harmonic automorphisms of the disk
A harmonic self-homeomorphism of a disk does not increase the area of any
concentric disk.Comment: 7 page
Existence of energy-minimal diffeomorphisms between doubly connected domains
The paper establishes the existence of homeomorphisms between two planar
domains that minimize the Dirichlet energy. Specifically, among all
homeomorphisms f : R -> R* between bounded doubly connected domains such that
Mod (R) < Mod (R*) there exists, unique up to conformal authomorphisms of R, an
energy-minimal diffeomorphism. No boundary conditions are imposed on f.
Although any energy-minimal diffeomorphism is harmonic, our results underline
the major difference between the existence of harmonic diffeomorphisms and the
existence of the energy-minimal diffeomorphisms. The existence of globally
invertible energy-minimal mappings is of primary pursuit in the mathematical
models of nonlinear elasticity and is also of interest in computer graphics.Comment: 34 pages, no figure
Evidence Based Eye Care
A summary of the results from numerous randomized clinical trials in eye care for students and clinicians
Nonclassical rotational behavior at the vicinity of the lamda point
The rotational property of a quantum liquid at the vicinity of the lambda
point is examined. In a liquid helium 4 just above the lambda point, under the
strong influence of Bose statistics, the coherent many-body wave function grows
to an intermediate size between a macroscopic and a microscopic one, which is
of a different nature from the thermal fluctuations. It must reflect in the
rotational properties such as the moment of inertia. Beginning with the bosons
without the condensate, we make a perturbation calculation of its
susceptibility with respect to the repulsive interaction, and examine how, with
decreasing temperature, the growth of the coherent wave function gradually
changes the rotational behavior of a liquid:The moment of inertia slightly
decreases just above the lambda point. This means that at the vicinity of the
lambda point, the mechanical superfluid density does not always agree with the
thermodynamical one.We compare the result to the experiment by Hess and
Fairbank. A new interpretation of the shear viscosity just above the lambda
point is given from this viewpoint.Comment: 12pages, 5figure
Recommended from our members
Does the Early Bird Always get the Worm?
M&A can be motivated by many different things and it is not unnatural to believe that these motivations could be dependent on where we are in the M&A cycle. By extension if we believe that different motivations lead to different âsuccessâ rates then there could be different success rates at different points in the cycle. This is the topic of this report.
First movers have historically been feted for their strategic motivations in pursuing M&A and the advantages gained from moving early, such as the availability of attractive targets. In contrast, late followers have been characterised as firms that exemplify irrational behaviour as they are compelled by competitive pressures to mimic the actions of their rivals without a logical rationale for the motivations underlying the M&A announcement.
We set out to test this simplistic view and in this report we tested the difference in performance between first movers and late followers using a sample of global M&A deals for two periods, Wave 1 (1990-2002) and Wave 2 (2003-2009).
We found considerable evidence that this simplistic view may not be correct, with our so called âlate followersâ at least as successful as the âfirst moversâ.
Before we highlight some relevant practical findings for practitioners we will also show that there may be something different about the latest M&A wave. There are certain features of this second wave (notably the prevalence of cross-border M&A) that may make first mover advantage less prevalent. In addition, insight from literature in other fields may be casting those first movers in a less unreservedly flattering light, which should give managements pause in their attempts to be the first to acquire.
We conclude:
- Itâs not too late. If you find a compelling M&A opportunity but you feel others have invested in that area already, itâs not necessarily a bad thing.
- Somethingâs changed in the latest wave The M&A market is becoming more about new geographies and opportunities, deals where the more you know before you proceed, the better.
- M&A can and does add value Unavoidably, we looked at the data and saw a generally positive reaction to acquisitions, regardless of which end of the âwaveâ we are at.
And perhaps, judging by the positive reception given by the market to both our first movers and late followers, we must conclude that you donât want to be caught in the middle.
In M&A, unlike nature, the early bird may not always get the worm
Ophthalmic Drugs 2015
A handy reference about ophthalmic drugs for students and clinicians in eye care profession
Assessing the language of chat for teamwork dialogue
In technology enhanced language learning, many pedagogical activities involve students in online discussion such as synchronous chat, in order to help them practice their language skills. Besides developing the language competency of students, it is also crucial to nurture their teamwork competencies for today's global and complex environment. Language communication is an important glue of teamwork. In order to assess the language of chat for teamwork dimensions, several text mining methods are pos sible. However, difficulties arise such as pre-processing being a black box and classification approaches and algorithms being dependent on the context. To address these issues, the study will evaluate and explain preprocessing and classification methods used to analyze teamwork dialogue from a dataset of chat data. Analytics methods evaluated in this study provide a direction for assessing the language of chat for teamwork dialogue and can help extend the work of technology enhanced language learning to n ot only focus on academic competency, but on the communication aspect too
Failure analysis of a steel motorcycle kickstand
Copyright @ 2009 Springer US.A fractured steel motorcycle kickstand was metallurgically investigated using a range of failure analysis tools [visual examination, energy dispersive X-ray (EDX) analysis, electron microprobe analysis (EPMA), scanning electron microscopy (SEM), fractography, optical microscopy, hardness testing and non-destructive testing (NDT)]. The steel kickstandâs composition, its microstructure, electron fractographs, and mechanical test results have been critically interpreted. Some evidence of wear damage, in the failed kickstand, was observed. The microstructural and fractographic analyses showed pre-existing micro-cracks which were believed to have grown to result in ductile failure followed by acceleration of corrosion. Recommendations have been made to avoid the failure of the motorcycle kickstand
- âŠ