232 research outputs found
Liouville Vortex And Kink Solutions Of The Seiberg--Witten Equations
The Seiberg--Witten equations, when dimensionally reduced to \bf R^{2}\mit,
naturally yield the Liouville equation, whose solutions are parametrized by an
arbitrary analytic function . The magnetic flux is the integral of
a singular Kaehler form involving ; for an appropriate choice of ,
coaxial or separated vortex configurations with are
obtained when the integral is regularized. The regularized connection in the
\bf R^{1}\mit case coincides with the kink solution of theory.Comment: 14 pages, Late
On non- solutions to the Seiberg-Witten equations
We show that a previous paper of Freund describing a solution to the
Seiberg-Witten equations has a sign error rendering it a solution to a related
but different set of equations. The non- nature of Freund's solution is
discussed and clarified and we also construct a whole class of solutions to the
Seiberg-Witten equations.Comment: 8 pages, Te
Generalization of Weierstrassian Elliptic Functions to
The Weierstrassian and functions are generalized to
. The and cases have already been used in
gravitational and Yang-Mills instanton solutions which may be interpreted as
explicit realizations of spacetime foam and the monopole condensate,
respectively. The new functions satisfy higher dimensional versions of the
periodicity properties and Legendre's relations obeyed by their familiar
complex counterparts. For , the construction reproduces functions found
earlier by Fueter using quaternionic methods. Integrating over lattice points
along all directions but two, one recovers the original Weierstrassian elliptic
functions.Comment: pp. 9, Late
Relapse of minimal change disease after inactivated SARS-CoV-2 vaccination: case report
[No Abstract Available
A Quasiperiodic Gibbons--Hawking Metric and Spacetime Foam
We present a quasiperiodic self-dual metric of the Gibbons--Hawking type with
one gravitational instanton per spacetime cell. The solution, based on an
adaptation of Weierstrassian and functions to three
dimensions, conforms to a definition of spacetime foam given by Hawking.Comment: 14 pages, Late
N=2 Supersymmetric Model with Dirac-Kahler Fermions from Generalized Gauge Theory in Two Dimensions
We investigate the generalized gauge theory which has been proposed
previously and show that in two dimensions the instanton gauge fixing of the
generalized topological Yang-Mills action leads to a twisted N=2 supersymmetric
action. We have found that the R-symmetry of N=2 supersymmetry can be
identified with the flavour symmetry of Dirac-Kahler fermion formulation. Thus
the procedure of twist allows topological ghost fields to be interpreted as the
Dirac-Kahler matter fermions.Comment: 22 pages, LaTe
Prevalence and Predictors of Tobacco Use Among School Adolescents in Zakho, Kurdistan Region of Iraq
Knowledge regarding the smoking prevalence among the Kurdistan general population is not clear, at least for males. Here in the Kurdistan Youth Smoking Survey and Behaviours (KYSS&B) we tried to further expand our knowledge about the smoking profile of school students across Kurdistan. Five hundred students from four Zakho male basic schools were taken to participate in the study to determine the prevalence of smoking and socio-demographical factors associating with smoking among students aged 12 to 15 years. The KYSS&B questionnaire included various parameters such as age, gender, friends, parent history and blood groups. This study showed that the prevalence of students who ever tried smoking was 74%; about 65% of them started at age 12 years or less. Although the majority of participants (95%) knew that smoking is harmful and had negative impact on human health, 18% of them thought that they will never quit smoking. The study concluded that there was no strong association between family monthly income, parent education level and blood groups. On the other hand, the three most critical factors connected with smoking habit reported by students were age, peer influence and father smoking
Potentiation of thrombus instability: a contributory mechanism to the effectiveness of antithrombotic medications
© The Author(s) 2018The stability of an arterial thrombus, determined by its structure and ability to resist endogenous fibrinolysis, is a major determinant of the extent of infarction that results from coronary or cerebrovascular thrombosis. There is ample evidence from both laboratory and clinical studies to suggest that in addition to inhibiting platelet aggregation, antithrombotic medications have shear-dependent effects, potentiating thrombus fragility and/or enhancing endogenous fibrinolysis. Such shear-dependent effects, potentiating the fragility of the growing thrombus and/or enhancing endogenous thrombolytic activity, likely contribute to the clinical effectiveness of such medications. It is not clear how much these effects relate to the measured inhibition of platelet aggregation in response to specific agonists. These effects are observable only with techniques that subject the growing thrombus to arterial flow and shear conditions. The effects of antithrombotic medications on thrombus stability and ways of assessing this are reviewed herein, and it is proposed that thrombus stability could become a new target for pharmacological intervention.Peer reviewedFinal Published versio
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