Fermion space charge in narrow-band gap semiconductors, Weyl semimetals and around highly charged nuclei

The field of charged impurities in narrow-band gap semiconductors and Weyl semimetals can create electron-hole pairs when the total charge Ze of the impurity exceeds a value Z_{c}e. Particles of one charge escape to infinity, leaving a screening space charge. The result is that the observable dimensionless impurity charge Q_{infinity} is less than Z but greater than Z_{c}. There is a corresponding effect for nuclei with Z >Z_{c} \approx 170, however in the condensed matter setting we find Z_{c} to be about 10. Thomas-Fermi theory indicates that Q_{\infinity} = 0 for the Weyl semimetal, but we argue that this is a defect of the theory. For the case of a highly-charged recombination center in a narrow band-gap semiconductor (or of a supercharged nucleus), the observable charge takes on a nearly universal value. In Weyl semimetals the observable charge takes on the universal value Q_{infinity} = Z_{c} set by the reciprocal of material's fine structure constant.

Date:
-
Location:
CP179
Tags/Keywords:
condensed matter

Enforcing equality: court rulings, indigenous women, and political participation in Oaxaca, Mexico

Within the last decade, Mexico´s federal electoral courts have taken unprecedented steps to promote affirmative action in favor of women´s political participation. At the federal, state, and municipal levels, this has largely meant rulings that support legislation on gender-based quotas for public posts.  A stumbling block to this affirmative action initiative has been the predominately indigenous municipalities that hold local elections through tradition and custom instead of universal suffrage and secret ballot. Legally recognized as part of indigenous people´s collective right to self-determination, election through custom and tradition has been difficult to fit into existing juridical logics of gender equality.  In the past three years, however, a growing number of electoral conflicts appealed to the federal courts have brought the question of indigenous women´s political participation to the forefront. I examine several of these cases to explore how the courts mediate between the question of collective self-determination and individual women´s rights, how they seek to promote a liberal notion of gender equality, and how women and communities are responding to their rulings in unexpected ways.  I argue that what is at stake is more than just women´s political participation; rather, these rulings reflect contemporary contestations over gender, indigeneity, modernity, and democracy in Mexico more broadly.  
Holly Worthen is a Professor at the Instituto de Investigaciones Sociológicas at the Universidad Autónoma Benito Juárez de Oaxaca in the state of Oaxaca, Mexico.  She received her Phd in Geography from the University of North Carolina at Chapel Hill.  Her work focuses on gender, migration, development and indigenous politics.

 
Date:
-
Location:
231 White Hall Classroom Building
Tags/Keywords:
geography
latin american studies
hispanic studies
mexico
Event Series:
Colloquium Talk

Algebra and Geometry Seminar

Title of lecture :The Fundamental Theorem of Commutative Algebra(FTOCA)
 
Abstract:The Lecture is about the theorem of right invertibility of matrices over Commutative Rings(FTOCA)
A proof of  FTOCA in the context of linear systems  and various applications of it (like the lemma of Nakayama and vanishing  of the tensor product) are being presented  in the lecture.
Date:
-
Location:
POT 745

Algebra and Geometry Seminar

Title:

Vector bundles on moduli space of stable curves with marked points.





Abstract:

Conformal block vector bundles are vector bundles on the moduli space

of stable curves with marked points defined using certain Lie

theoretic data. Over smooth curves, these vector bundles can be

identified with generalized theta functions. In this talk we discuss

extension of this identification over the stable curves.

This is joint work with P. Belkale and A. Gibney

Date:
-
Location:
Funkhauser 311

Compressed Course: "Mapping Variation: An Introduction to the Use of Geospatial Tools for Linguistic Analysis" (A&S 500-003)

This one-week, one-credit compressed course focuses on mapping variation through the use of geospatial tools like GIS.  The course, offered as A&S 500-003, will take place from November 9-13 from 5-8pm each day in the Oliver Raymond Building, room C226.  As a 500-level course, it is open to both graduate and undergraduate students.

Dr. Montgomery's research investigates ways of integrating techniques used in geography with those traditionally used in dialectology.  His specific focus in the use of GIS technologies is innovative in the field of linguistics, and his presence on UK's campus will expose the community here to some of the most recent endeavors in these kinds of digital humanities research methodologies.  Despite a focus in linguistic variation, this class will present methods that could be applied to many of the social sciences and humanities, wherein the questions deal with societal patterns, variations in those patterns, and the geospatial presentation and analysis of data related to those patterns.  If you have any questions about this course, please contact Dr. Jennifer Cramer (jennifer.cramer@uky.edu).

Date:
-
Location:
Oliver H Raymond Building, Room C226
Tags/Keywords:
linguistics
Event Series:
Appalachian Center Events

Miguel Alvear Presents: Beyond the Mall: A Documentary About Popular Video Films in Ecuador

Miguel Alvear Presents: 

Beyond the Mall: A Documentary About Popular Video Films in Ecuador

Miguel Alvear is an Ecuadorian filmmaker. His recent movies are Más allá del Mall (2010) and Blak Mama (2009). He studied in Belgium and at the SFAI (California). His movies have been recognized with the Award DocTV in 2010, the prize for best Ecuadorian movie in 2008, and in the “Festival der Nationen”, Austria, 1996.

Sept 24th 4-6:30 pm 

White Hall Classroom Building 234

Sponsored by the International Studies Program, Latin American, Caribbean and Latino Studies at the University of Kentucky,Sociology Department University of Kentucky, University of Kentucky Department of Hispanic Studies

 

Date:
-
Location:
White Hall Classroom 234
Tags/Keywords:
sociology
latin american studies
hispanic studies
international studies
Subscribe to