6,848 research outputs found
Security and Citizenship in Global South: In/securing citizens in early Republican Turkey (1923-1946)
Cataloged from PDF version of article.The relationship between security and citizenship is more complex than media portrayals based
on binary oppositions seem to suggest (included/excluded, security/insecurity), or mainstream
approaches to International Relations (IR) and security seem to acknowledge. This is particularly
the case in the post-imperial and/or postcolonial contexts of global South where the transition
of people from subjecthood to citizenship is better understood as a process of in/securing. For,
people were secured domestically as they became citizens with access to a regime of rights and
duties. People were also secured internationally as citizens of newly independent ‘nation-states’
who were protected against interventions and/or ‘indirect rule’ by the (European) International
Society, whose practices were often justified on grounds of the former’s ‘failings’ in meeting the
so-called ‘standards of civilization’. Yet, people were also rendered insecure as they sought to
approximate and/or resist the citizen imaginaries of the newly established ‘nation-states’. The
article illustrates this argument by looking at the case of Turkey in the early Republican era
(1923–1946)
The Gambier Mapping
We propose a discrete form for an equation due to Gambier and which belongs
to the class of the fifty second order equations that possess the Painleve
property. In the continuous case, the solutions of the Gambier equation is
obtained through a system of Riccati equations. The same holds true in the
discrete case also. We use the singularity confinement criterion in order to
study the integrability of this new mapping.Comment: PlainTe
Transformations of Heun's equation and its integral relations
We find transformations of variables which preserve the form of the equation
for the kernels of integral relations among solutions of the Heun equation.
These transformations lead to new kernels for the Heun equation, given by
single hypergeometric functions (Lambe-Ward-type kernels) and by products of
two hypergeometric functions (Erd\'elyi-type). Such kernels, by a limiting
process, also afford new kernels for the confluent Heun equation.Comment: This version was published in J. Phys. A: Math. Theor. 44 (2011)
07520
Linearisable Mappings and the Low-Growth Criterion
We examine a family of discrete second-order systems which are integrable
through reduction to a linear system. These systems were previously identified
using the singularity confinement criterion. Here we analyse them using the
more stringent criterion of nonexponential growth of the degrees of the
iterates. We show that the linearisable mappings are characterised by a very
special degree growth. The ones linearisable by reduction to projective systems
exhibit zero growth, i.e. they behave like linear systems, while the remaining
ones (derivatives of Riccati, Gambier mapping) lead to linear growth. This
feature may well serve as a detector of integrability through linearisation.Comment: 9 pages, no figur
Constructing Integrable Third Order Systems:The Gambier Approach
We present a systematic construction of integrable third order systems based
on the coupling of an integrable second order equation and a Riccati equation.
This approach is the extension of the Gambier method that led to the equation
that bears his name. Our study is carried through for both continuous and
discrete systems. In both cases the investigation is based on the study of the
singularities of the system (the Painlev\'e method for ODE's and the
singularity confinement method for mappings).Comment: 14 pages, TEX FIL
On the new translational shape invariant potentials
Recently, several authors have found new translational shape invariant
potentials not present in classic classifications like that of Infeld and Hull.
For example, Quesne on the one hand and Bougie, Gangopadhyaya and Mallow on the
other have provided examples of them, consisting on deformations of the
classical ones. We analyze the basic properties of the new examples and observe
a compatibility equation which has to be satisfied by them. We study particular
cases of such equation and give more examples of new translational shape
invariant potentials.Comment: 9 pages, uses iopart10.clo, version
Engineering multiple levels of specificity in an RNA viral vector
Synthetic molecular circuits could provide powerful therapeutic capabilities, but delivering them to specific cell types and controlling them remains challenging. An ideal "smart" viral delivery system would enable controlled release of viral vectors from "sender" cells, conditional entry into target cells based on cell-surface proteins, conditional replication specifically in target cells based on their intracellular protein content, and an evolutionarily robust system that allows viral elimination with drugs. Here, combining diverse technologies and components, including pseudotyping, engineered bridge proteins, degrons, and proteases, we demonstrate each of these control modes in a model system based on the rabies virus. This work shows how viral and protein engineering can enable delivery systems with multiple levels of control to maximize therapeutic specificity
Some boundary effects in quantum field theory
We have constructed a quantum field theory in a finite box, with periodic
boundary conditions, using the hypothesis that particles living in a finite box
are created and/or annihilated by the creation and/or annihilation operators,
respectively, of a quantum harmonic oscillator on a circle. An expression for
the effective coupling constant is obtained showing explicitly its dependence
on the dimension of the box.Comment: 12 pages, Late
A Bilinear Approach to Discrete Miura Transformations
We present a systematic approach to the construction of Miura transformations
for discrete Painlev\'e equations. Our method is based on the bilinear
formalism and we start with the expression of the nonlinear discrete equation
in terms of -functions. Elimination of -functions from the
resulting system leads to another nonlinear equation, which is a ``modified''
version of the original equation. The procedure therefore yields Miura
transformations. In this letter, we illustrate this approach by reproducing
previously known Miura transformations and constructing new ones.Comment: 7 pages in TeX, to appear in Phys. Letts.
Green's function for a Schroedinger operator and some related summation formulas
Summation formulas are obtained for products of associated Lagurre
polynomials by means of the Green's function K for the Hamiltonian H =
-{d^2\over dx^2} + x^2 + Ax^{-2}, A > 0. K is constructed by an application of
a Mercer type theorem that arises in connection with integral equations. The
new approach introduced in this paper may be useful for the construction of
wider classes of generating function.Comment: 14 page
- …
