1,283 research outputs found
On the Collective Mode Spectrum for Composite Fermions at 1/3 Filling Factor
The collective mode spectrum of the composite fermion state 1/3 filling
factor is evaluated. At zero momentum, the result coincides with the cyclotron
energy at the external magnetic field value, and not at the effective magnetic
field, in spite of the fact that only the former enters in the equations, thus,
the Kohn theorem is satisfied. Unexpectedly, in place of a magneto roton
minimum, the collective mode gets a treshold indicating the instability of the
mean field composite fermion state under the formation of crystalline
structures. However, the question about if if this outcome only appears within
the mean field approximation should be further considered.Comment: 17 pages, one figure. Submitted to Int. Jour. Mod. Phys.
Guides and Guidance: Subverting Tourist Narratives in Trans-Indigenous Time and Space
My dissertation is a study of the ways in which Indigenous writers and theorists suggest we decolonize the sites of knowledge production through our pedagogical and methodological practices. Ultimately, my dissertation is about the power of story and finding the necessary strategies to change the narratives that do harm in our daily lives. I focus on the sites of knowledge production because these are the institutions and practices with which I am the most familiar. The purpose of this work is beyond metaphorical as I strive to forefront the narratives that change the ways in which settler-Indigenous relationships are formed in a geopolitical context. The subjects of this study include textbooks, curriculum requirements, archives, gardens, fieldwork research methodologies, museums, tourist sites, and schools that utilize decolonial praxis. As its primary theoretical framework, this project relies on Doreen Massey’s conceptualization of space as interrelational and ongoing, coupled with Linda Tuhiwai Smith’s definition of intervening as an Indigenizing methodology that changes institutions to serve Indigenous peoples, rather than changing Indigenous peoples to fit institutions. Since the sites of knowledge production are often intertribal, I examine trans-Indigenous strategies for intervening in Eurocentric narrative spaces by using Chadwick Allen’s trans-Indigenous methodologies in my literary analysis. In this study, I also analyze academic tourism — yet to be explored in my field — as the conflation of research methodologies and tourist practices at museums and heritage sites where knowledge is packaged for popular consumption and risks being unethically oversimplified. I expect my dissertation fieldwork on the spatial narrative of the Indian Community School (ICS) in Milwaukee and the Milwaukee Public Museum (MPM) will illuminate necessary strategies to create spaces that reflect our shared visions for a just society
Magnetic Collapse of a Neutron Gas: No Magnetar Formation
A degenerate neutron gas in equilibrium with a background of electrons and
protons in a magnetic field exerts its pressure anisotropically, having a
smaller value perpendicular than along the magnetic field. For critical fields
the magnetic pressure may produce the vanishing of the equatorial pressure of
the neutron gas, and the outcome could be a transverse collapse of the star.
This fixes a limit to the fields to be observable in stable pulsars as a
function of their density. The final structure left over after the implosion
might be a mixed phase of nucleons and meson ()
condensate (a strange star also likely) or a black string, but no magnetar at
all.Comment: 5 pages, 1 latex file, 1 encapsulated figure. Submitted to Physical
Review Letters (24/11/2000
Modifying IMSMA Training: The Mine Action Information Management Qualification Scheme
The Mine Action Information Management Qualification Scheme (MIQ) is a new training tool for the Information Management System for Mine Action. It was created in response to the Next Generation version of IMSMA, the newest version of the system. The Geneva International Centre for Humanitarian Demining eliminated the rigid and unnecessary parts of the training-system in order to make MIQ more user-friendly. The MIQ scheme is currently being incorporated into several countries’ information-management programs, but it could still use input as it is being refined and implemented
Land-release Information Management: Advocating for a Collaborative Approach
For land release to become more efficient and less dangerous, operations on the ground need accurate information. Collaboration between information management and operational planning will help increase safety while working toward releasing more land. The most challenging aspect of land release is the identification of boundaries around contaminated areas, and using new information technologies will aid not only operation managers in the area, but also senior managers setting long-term goals
Stability Conditions and the Single Mode Approximation in FQHE
A thermodynamic stability criterion for the spontaneous breaking of the
translation invariance of many particle systems is derived. It simply requires
the positive character of the wavevector dependent dielectric function as
generalising the same condition for macroscopic dielectric constants. Its
application to the Single Mode Approximation (SMA) for the description of the
collective modes of the filling factor 1/m Laughlin states is considered. The
results indicate that the stability condition is violated by the SMA for all
the relevant states m=3,5,7,9 in a wavevector neighborhood of the magneto-roton
minima. These conclusions are in qualitative agreement with similar results
obtained from the solution of the Bethe-Salpeter equation at 1/3 filling factor
for both composite fermions and phenomenologically described electrons in the
Laughlin state.Comment: 14 pages, two figures, the spelling and acknowledgments were
correcte
Underground Anthology vol. 1
The Underground Anthology is a journal for BIPOC authors to share their creative writing works with the world. The UA team felt there was something missing in existing creative writing publications on campus: BIPOC representation. In a predominantly white institution, and a predominantly white field of study, all we want are our stories told. UA acknowledges that it is equally as important to uplift, amplify, and empower the talented voices of underrepresented students in order to create a more vibrant and diversified campus climate. We hope that this journal will inspire change in the ways we conventionally think about literature. In doing so, we strive to expand the literary canon and encourage our fellow artists to look at creative writing through a multicultural lens
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