6,390 research outputs found
Culture and Gender Representation in Iranian School Textbooks
This study examines the representations of male and female social
actors in selected Iranian EFL (English as a Foreign Language) textbooks. It is grounded in Critical Discourse Analysis and uses van Leeuwen’s Social Actor Network Model to analyze social actor representations in the gendered discourses of compulsory heterosexuality. Findings from the analysis show that the representations endorse the discourse of compulsory heterosexuality which is an institutionalized form of social practice in Iran. Three male and three female students were interviewed to find out what they think about these representations. Their responses with regard to whether they think textbooks should also include representations of other forms of sexuality were non-committal and vague. To them LGBT people are the ‘‘Other’’ practicing a form of sexuality that is not normal. Such exclusions could obscure the reality regarding the existence of such gender identities and represent the world in a particular manner
Kinetic surface roughening for the Mullins-Herring equation
Using the linearity property of the Mullins-Herring equation when the
velocity is zero with a Gaussian noise, we obtain an analytic form for the
global mean-square surface width and height-height correlation function. This
can be used to read the critical exponents in any dimension. In particular for
d=1 we show that although the surface is super rough the system exhibits
Family-Vicsek scaling behavior.Comment: 5 page
Some Applications of Polynomial Optimization in Operations Research and Real-Time Decision Making
We demonstrate applications of algebraic techniques that optimize and certify
polynomial inequalities to problems of interest in the operations research and
transportation engineering communities. Three problems are considered: (i)
wireless coverage of targeted geographical regions with guaranteed signal
quality and minimum transmission power, (ii) computing real-time certificates
of collision avoidance for a simple model of an unmanned vehicle (UV)
navigating through a cluttered environment, and (iii) designing a nonlinear
hovering controller for a quadrotor UV, which has recently been used for load
transportation. On our smaller-scale applications, we apply the sum of squares
(SOS) relaxation and solve the underlying problems with semidefinite
programming. On the larger-scale or real-time applications, we use our recently
introduced "SDSOS Optimization" techniques which result in second order cone
programs. To the best of our knowledge, this is the first study of real-time
applications of sum of squares techniques in optimization and control. No
knowledge in dynamics and control is assumed from the reader
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