Conference Paper

The dignified exit of Vangelis Yakoumakis

April 2015

Conference: Preparatory work for the congress of the New Lacanian School "Moments of Crisis"
Volume: Slashes

Authors:

A short text on the recent tragic death of a brutally bullied young Greek student, under the rubric "Slashes" of the upcoming annual congress of the NLS to take place in Geneva

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Article

Freak waves in GaAs semiconductor

June 2014 · Physica B Condensed Matter

Nabila Elbedwehy

The nonlinear freak wave in electron–hole quantum GaAs semiconductor plasma is investigated via a nonlinear Schrödinger equation (NLS) equation. The latter contains the contributions of the electron and hole quantum recoil effects, quantum statistical pressures, as well as exchange and correlation effects. Typical values for GaAs semiconductor are used to estimate the profile of the nonlinear ... [Show full abstract] freak waves.

Article

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Bi-Hamiltonian operators, integrable flows of curves using moving frames, and geometric map equation...

December 2005 · Journal of Physics A Mathematical and General

Stephen C. Anco

Moving frames of various kinds are used to derive bi-Hamiltonian operators and associated hierarchies of multi-component soliton equations from group-invariant flows of non-stretching curves in constant curvature manifolds and Lie group manifolds. The hierarchy in the constant-curvature case consists of a vector mKdV equation coming from a parallel frame, a vector potential mKdV equation coming ... [Show full abstract] from a covariantly-constant frame, and higher order counterparts generated by an underlying vector mKdV recursion operator. In the Lie-group case the hierarchy comprises a group-invariant analog of the vector NLS equation coming from a left-invariant frame, along with higher order counterparts generated by a recursion operator that is like a square-root of the mKdV one. The corresponding respective curve flows are found to be given by geometric nonlinear PDEs, specifically mKdV and group-invariant analogs of Schrodinger maps. In all cases the hierarchies also contain variants of vector sine-Gordon equations arising from the kernel of the respective recursion operators. The geometric PDEs that describe the corresponding curve flows are shown to be wave maps. Full details of these results are presented for two main cases: $S^2,S^3\simeq SU(2)$. Comment: Published version with minor editing changes

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The Effects of a Multimedia System in Supermarkets To Alter Shoppers' Food Purchases

April 1997 · Journal of Health Psychology

A randomized-control test of a multimedia nutrition intervention-the Nutrition for a Lifetime System (NLS©)- utilized supermarket receipts to examine effects of NLS treatment on the daily per person nutritional content of participants' supermarket purchases. In regression analyses controlling for background variables, baseline purchases and trends toward increased purchasing, NLS treatment ... [Show full abstract] contributed to lower levels of total fat and to higher levels of total fiber and servings of fruits and vegetables at post-test. Redemption of NLS coupons contributed to greater decreases in fat and increases in servings of fruits and vegetables in users' purchases. Implications for future interventions promoting healthier food choices include tailoring program content and addressing broader lifestyle issues such as caloric intake and expenditure.

Article

Is There an Earnings Premium for Catholic Women? Evidence from the NLS Youth Cohort

January 2005

Todd P. Steen

This paper examines the relationship between religious background and earnings for women in the year 2000 wave of the National Longitudinal Survey of Youth 1979 Cohort. The paper estimates selectivity corrected human capital earnings functions, and finds evidence that women raised as Catholics enjoy an earnings premium relative to women raised as Protestants, although the premium diminishes over ... [Show full abstract] time. This paper also examines earnings for women raised in various Protestant denominations. JEL Codes: J31, Z12.

Article

Karyopherin b2 mediates nuclear import of a mRNA binding protein (cDNA-deduced sequenceyrecombinant...

J UNONAMOROIANU NERISBONIFACI

We have cloned and sequenced cDNA for human karyopherin b2, also known as transportin. In a solution binding assay, recombinant b2 bound directly to recombinant nuclear mRNA-binding protein A1. Binding was inhibited by a peptide representing A1's previously charac- terized M9 nuclear localization sequence (NLS), but not by a peptide representing a classical NLS. As previously shown for ... [Show full abstract] karyopherin b1, karyopherin b2 bound to several nucleopor- ins containing characteristic peptide repeat motifs. In a solution binding assay, both b1 and b2 competed with each otherforbindingtoimmobilizedrepeatnucleoporinNup98.In digitonin-permeabilized cells, b2 was able to dock A1 at the nuclear rim and to import it into the nucleoplasm. At low concentrations of b2, there was no stimulation of import by theexogenousadditionoftheGTPaseRan.However,athigher concentrations of b2 there was marked stimulation of import by Ran. Import was inhibited by the nonhydrolyzable GTP analog guanylyl imidodiphosphate by a Ran mutant that is unable to hydrolyze GTP and also by wheat germ agglutinin. Consistent with the solution binding results, karyopherin b2 inhibited karyopherin ayb1-mediated import of a classical NLS containing substrate and, vice versa, b1 inhibited b2- mediated import of A1 substrate, suggesting that the two import pathways merge at the level of docking of b1 and b2 to repeat nucleoporins.

Article

On the 1-dim defocusing NLS equation with non-vanishing initial data at infinity

December 2018

Article

Full-text available

Instability of vortex solitons for 2D focusing NLS

May 2006 · Advances in Differential Equations

Tetsu Mizumachi

We study instability of a vortex soliton $e^{i(m\theta+\omega t)}\phi_{\omega,m}(r)$ to $$iu_t+\Delta u+|u|^{p-1}u=0,\quad\text{for $x\in\R^n$, $t>0$,}$$ where $n=2$, $m\in\N$ and $(r,\theta)$ are polar coordinates in $\R^2$. Grillakis \cite{Gr} proved that every radially standing wave solutions are unstable if $p>1+4/n$. However, we do not have any examples of unstable standing wave solutions in ... [Show full abstract] the subcritical case $(p<1+n/4)$. Suppose $\phi_{\omega,m}$ is nonnegative. We investigate a limiting profile of $\phi_{\omega,m}$ as $m\to\infty$ and prove that for every $p>1$, there exists an $m_*\in \N$ such that for $m\ge m_*$, a vortex soliton $e^{i(m\theta+\omega t)}\phi_{\omega,m}(r)$ becomes unstable to the perturbations of the form $e^{i(m+j)\theta}v(r)$ with $1\ll j\ll m$. Comment: 20pages, no figure

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Article

An Analysis of Primary Literacy Policy in England using Barthes’ Notion of ‘Readerly’ and ‘Writerly’...

August 2001 · Journal of Early Childhood Literacy

Kathy Hall

This article seeks to describe and explain the nature of current literacy policy in England, especially the National Literacy Strategy (NLS). It applies Barthes’ concept of ‘readerly’ and ‘writerly’ texts to literacy policy documents. The article is not so much about the merits or demerits of the various conceptions of literacy underpinning the documents, but about who gets to define what counts ... [Show full abstract] as literacy and the most appropriate way to develop it. A key question to be addressed is: where does authority lie in the English policy texts on primary literacy? The article refers to three primary policy contexts, in order to understand the origin and format of the current policy: ‘the context of influence’; ‘the context of policy text production’; and ‘the context of practice’. The first section of the article outlines the theoretical framework, it offers a rationale for the focus and approach, it explains the notion of policy contexts, and it then describes Barthes’ account of literary texts. The second, and longer section, examines current policy documents in the light of this framework. It is argued that state control over literacy policy increased considerably with the advent of the NLS and this occurred at the cost of teacher power and teacher autonomy.

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Figure S5

December 2009

Representation of standard and modified assay plates. The mutant animals fat-4(wa14)fat-1(wa9) and fat-3(wa22), which all exhibited uncoordinated (unc) phenotypes, were assayed using modified adaptation assays by placing worms at the center of the assay plate. By modifying the origin point, shorter distances were traveled to overcome the unc phenotype problem with assaying these animals. Modified ... [Show full abstract] assays were also used to assay fat-3(wa22); Ex [(p)odr-3::NLS::GFP::EGL-4] animals and fat-3(wa22); Ex[(p)AWC::FAT-3] animals. (0.23 MB TIF)

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Article

The U.S. Talking Book System

June 1994 · Resource Sharing & Information Networks

The purpose of this paper is to discuss the requirements and constraints that govern current and future designs of the U.S. talking-book system. A talking-book system includes all the components that allow a user to hear an audio version of reading material. Aspects of the system discussed here are unique to the National Library Service for the Blind and Physically Handicapped, Library of ... [Show full abstract] Congress (NLS) to meet our needs, especially the scale, funding, and delivery systems. Other places will have their own way. We are presenting this as an example of what we consider a complete system. We hope it will lead people to think in those terms and to find the areas where systems can meet. This paper is intended as a first step to encourage the exchange of similar information about the requirements of talking-book systems in other countries. Ultimately, our objective is to use this information in the cooperative development of an international talking-book system technical interface standard that, if incorporated in future designs, would facilitate the international interlending of audio materials for the blind.

Article

Full-text available

Hyperbolic Shock Waves of the Optical Self-Focusing with Normal Group-Velocity Dispersion

November 2002 · Physical Review Letters

Self-similar collapsing states have enabled to describe the hyperbolic shock fronts taking place in the boundary layer separating focusing/defocusing domains in NLS equations with normal GVD. The shocks develop with singular spikes distributed along hyperbolas. Particularly in the (2+1)-dimensional case, several shock waves arise as the core solution of |ψ| expands in a rather large region ... [Show full abstract] (|ξT|=2/β>1). In the (3+1)-dimensional case, the self-focusing core exhibits a narrower extension domain (|ξT|=3.1).

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Article

Lack of Ground State for NLSE on Bridge-Type Graphs

April 2014

We prove the nonexistence of ground states for NLS on bridge-like graphs, i.e. graphs with two halflines and four vertices, of which two at infinity, with Kirchhoff matching conditions. By ground state we mean any minimizer of the energy functional among all functions with the same mass.

The dignified exit of Vangelis Yakoumakis

Abstract

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