Symmetries of differential-difference dynamical systems in a two-dimensional lattice

Classification of differential-difference equation of the form $\ddot{u}_{nm}=F_{nm}\big(t, \{u_{pq}\}|_{(p,q)\in \Gamma}\big)$ are considered according to their Lie point symmetry groups. The set $\Gamma$ represents the point $(n,m)$ and its six nearest neighbors in a two-dimensional triangular lattice. It is shown that the symmetry group can be at most 12-dimensional for abelian symmetry algebras and 13-dimensional for nonsolvable symmetry algebras.Comment: 24 pages, 1 figur

Oscillations and stability of numerical solutions of the heat conduction equation

The mathematical model and results of numerical solutions are given for the one dimensional problem when the linear equations are written in a rectangular coordinate system. All the computations are easily realizable for two and three dimensional problems when the equations are written in any coordinate system. Explicit and implicit schemes are shown in tabular form for stability and oscillations criteria; the initial temperature distribution is considered uniform

Evaluating Judges and Judicial Institutions: Reorienting the Perspective

Empirical scholarship on judges, judging, and judicial institutions, a staple in political science, is becoming increasingly popular in law schools. We propose that this scholarship can be improved and enhanced by greater collaboration between empirical scholars, legal theorists, and the primary subjects of the research, the judges. We recently hosted a workshop that attempted to move away from the conventional mode of involving judges and theorists in empirical research, where they serve as commentators on empirical studies that they often see as reductionist and mis-focused. Instead, we had the judges and theorists set the discussion agenda for the empiricists by describing topics that they thought were worthy of inquiry. In this essay, we explain why we think collaboration of this sort should be encouraged and draw on the workshop experience to offer suggestions for improving the quality and utility of empirical research in this area

Wild Stallion Distortion Pedal

The Wild Stallion Distortion Pedal project encompasses the research, design, implementation, PCB layout, and packaging of a distortion effect pedal for the electric guitar. This project aims to use analog circuitry in order to replicate the effect of vintage tube amplifiers to create a distortion effect. The procedure includes research, design, simulations, and prototype testing in order to produce a quality distortion effect built as a stomp pedal for the electric guitar

Alien Registration- Wood, Levi E. (Presque Isle, Aroostook County)

https://digitalmaine.com/alien_docs/33568/thumbnail.jp

The Prado Family, European culture and the rediscover of Brazil, 1860-1930

 Culturally, the nineteenth century in Brazilian history was a periodof "re-Europeanization", of "reconquest", or of recolonization inwhich the three centuries of Portuguese domination were replaced byEuropean influences emanating from Britain and France in particular(1)