The Drell-Hearn-Gerasimov sum-rule is really two sum-rules: one for each of the valence and the sea/glue contributions to the nucleon wavefunction. The convergence of these sum-rules follows from the Froissart bound for spin dependent processes in QCD and is necessary for the consistency of the constituent quark model of low energy QCD. Some challenges for future polarised photoproduction exper...

In genetic fuzzy systems (GFS) the size of the problem has a huge influence in the performance of the obtained models, since i) the fuzzy rule bases learned suffer from exponential rule explosion when the number of variables increases, and ii) the convergence time increments with the number of examples. In this paper we present S-FRULER, a scalable distributed version of FRULER which is a GFS t...

The evaluation of production rules generated by different data mining algorithms currently depends upon the data set used, thus their generalization capability cannot be estimated. Our method consists of three steps. Firstly, we take a set of rules, copy these rules into a population of rules, and then perturb the parameters of individuals in this population. Secondly, the maximum robustness bo...

Questions: Does intraspecific extension of Bergmann s rule – larger size within a species in cooler areas – hold true for ectotherms in general, and for the common frog (Rana temporaria) in particular? What is the relative importance of genetic and environmental factors (i.e. direct environmental induction) in determining latitudinal patterns of body size variation in common frogs? Methods: We ...

The molecular orbital model of hyperconjugation was utilized in rationalizing some long range interactions in carbocations. Conveniently such interactions can be detected by measuring secondary · kinetic deuterium isotope effects. Hilckel's 4n + 2 rule can be extended to interactions between the cationic center and pseudo-:n: orbitals of CH3, CH2 and CH groups respectively. Thus, in analogy to ...

Background: A thorough understanding of the Rheumatic Heart disease is important to aid in the management of patients with RHD. We hereby thus study various presentations, distributions, clinical profile of various types of valvular involvement in patients with RHD, complications of RHD such as heart failure, arrhythmias, chamber dilation, thromboembolic manifestation, pulmonary hypertension et...

A data-driven wall model for turbulent flows over periodic hills is developed using a feedforward neural network and wall-resolved large-eddy simulation data. The employs wall-normal distance, near-wall velocities, pressure gradients as input features, the shear stresses output labels, respectively. In $a$ $p\phantom{\rule{0}{0ex}}r\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o\phantom{\rule{...

We examine the time-dependent non-equilibrium current in a mesoscopic metal ring threaded by a static magnetic flux φ that is generated by a time-dependent electric field oscillating with frequency ω. We show that in quadratic order in the field there are three fundamentally different contributions to the current. (a) A time-independent contribution which can be obtained from a thermodynamic de...