2017 Legislative Recap: Important Bills from Nevada\u27s 79th Legislative Session

After the “red wave” of voters swept across the nation’s midterm elections in 2014, Nevada Republicans held a bicameral majority in the 78th (2015) Legislative Session. The subsequent 2016 presidential election tipped the balance of power as Nevada Democrats took back the majority in both houses for the 79th (2017) Legislative Session. The Senate went from an 11-10 Republican advantage to an 11-9-1 advantage for Democrats, and the Assembly flipped from a 25-17 Republican advantage to a 27-15 Democrat advantage. The issues that had previously dominated the 2015 Session, such as tort reform, collective bargaining overhauls, and funding for Education Savings Accounts (ESAs), seemed dead-on-arrival ahead of the 2017 Session. However, with Republican Governor Brian Sandoval at the helm for his last term, Nevada was poised to see the 2017 Session result in a stalemate, with neither extensive Democratic reforms nor significant Democratic rollbacks to the hard-won legislative gains by Republicans back in 2015

Construcción de los modelos sobre la electroquímica y su enseñanza

Esta investigación presenta los principales resultados referentes a la aplicación de una propuesta didáctica acerca de Electroquímica, la investigación se sustenta en la necesidad de construir y transformar el conocimiento de forma científica, haciendo uso de la evolución histórica y epistemológica de la misma, así como la implementación de modelos para la enseñanza. A través del estudio y aplicación de la propuesta, a un grupo de estudiantes en el entorno escolar de un curso de grado 11 en el colegio Distrital San Rafael de Bogotá, se pudo evidenciar las ventajas de aplicar un método de enseñanza basada en la modelización y contextualización histórica y epistemológica de las ciencias como la química

Pattern formation in a predator-prey system characterized by a spatial scale of interaction

We describe pattern formation in ecological systems using a version of the classical Lotka-Volterra model characterized by a spatial scale which controls the predator-prey interaction range. Analytical and simulational results show that patterns can emerge in some regions of the parameters space where the instability is driven by the range of the interaction. The individual-based implementation captures realistic ecological features. In fact, spatial structures emerge in an erratic oscillatory regime which can contemplate predators' extinction.Comment: 5 pages, 4 figure

Screening Ryegrass Cultivars for Aluminium Sensitivity in Nutrient Soluations

The objective of this study was to evaluate Al and H+ tolerance of nine ryegrass (Lolium perenne and L. multiflorum) cultivars by growing plants in a mineral solution (pH 4.8 and 6.0 and 0-200 (M Al). Results showed that Yatsyn-1, with a relative root length of 91 was the cultivar least affected by acidity (H+), and Concord ( RRLpH = 58) was the cultivar with the highest H+ sensitivity. In connection with Al-tolerance, Yatsyn-1 and Concord, were the most tolerant cultivars with 88 and 87 RRLAl, respectively whereas Nui and Marathon, were the most sensitive ones, reaching only a 66, 60 RRLAl, respectively

Physical Wigner functions

In spite of their potential usefulness, the characterizations of Wigner functions for Bose and Fermi statistics given by O'Connell and Wigner himself almost thirty years ago has drawn little attention. With an eye towards applications in quantum chemistry, we revisit and reformulate them in a more convenient way.Comment: Latex, 10 page

Study of process parameters on aluminium foam formation in the Al-6Si-3Mg alloy

The aim of this research was to study the process parameters that promote foam formation by injecting N2 into Al-6Si-3Mg wt % molten alloy with silicon carbide particles additions (SiC). An experimental design was proposed, in which the contents of SiC particles were 0, 10, 30 and 50 wt %, and the overheating was defined as ΔT= TF - TL , where TL is the liquidus temperature and was determined by the cooling curve method and the foaming temperatures were selected as TF at 630, 610, 580 and 570 °C. Flow and pressure of air blow were constant, 2,0 lt/min and 4,0 atm, respectively. The foam formation was possible only under two experimental conditions, 10 wt % SiC at ΔT > 12 °C and 30 wt % SiC at ΔT > 10 °C. The foams obtained under these conditions were stable, while with other conditions of experiments, bubble coallesence occurred. Finally, it was concluded that the foam formation occurred by SiC contents lower than 30 wt % SiC and temperatures slightly above the liquidus

Spin Density wave instability in a ferromagnet

Ferromagnetic (FM) and incommensurate spin-density wave (ISDW) states are an unusual set of competing magnetic orders that are seldom observed in the same material without application of a polarizing magnetic field. We report, for the first time, the discovery of an ISDW state that is derived from a FM ground state through a Fermi surface (FS) instability in Fe$_3$Ga$_4$. This was achieved by combining neutron scattering experiments with first principles simulations. Neutron diffraction demonstrates that Fe$_3$Ga$_4$ is in an ISDW state at intermediate temperatures and that there is a conspicuous re-emergence of ferromagnetism above 360 K. First principles calculations show that the ISDW ordering wavevector is in excellent agreement with a prominent nesting condition in the spin-majority FS demonstrating the discovery of a novel instability for FM metals; ISDW formation due to Fermi surface nesting in a spin-polarized Fermi surface.Comment: 6 pages with 4 figures. Supplemental Materials Include