3,631 research outputs found
Phase transitions in a gas of anyons
We continue our numerical Monte Carlo simulation of a gas of closed loops on
a 3 dimensional lattice, however now in the presence of a topological term
added to the action corresponding to the total linking number between the
loops. We compute the linking number using certain notions from knot theory.
Adding the topological term converts the particles into anyons. Using the
correspondence that the model is an effective theory that describes the
2+1-dimensional Abelian Higgs model in the asymptotic strong coupling regime,
the topological linking number simply corresponds to the addition to the action
of the Chern-Simons term. We find the following new results. The system
continues to exhibit a phase transition as a function of the anyon mass as it
becomes small \cite{mnp}, although the phases do not change the manifestation
of the symmetry. The Chern-Simons term has no effect on the Wilson loop, but it
does affect the {\rm '}t Hooft loop. For a given configuration it adds the
linking number of the 't Hooft loop with all of the dynamical vortex loops to
the action. We find that both the Wilson loop and the 't Hooft loop exhibit a
perimeter law even though there are no massless particles in the theory, which
is unexpected.Comment: 6 pages, 5 figure
Supersymmetric Sum Rules for Electromagnetic Multipoles
We derive model independent, non-perturbative supersymmetric sum rules for
the magnetic and electric multipole moments of any theory with N=1
supersymmetry. We find that in any irreducible N=1 supermultiplet the diagonal
matrix elements of the l-multipole moments are completely fixed in terms of
their off-diagonal matrix elements and the diagonal (l-1)-multipole moments.Comment: 10 pages, plain Te
Monolithic large-signal transimpedance amplifier for use in multi-gigabit, short-range optoelectronic interconnect applications
Published versio
Heating Bridge Decks by Electrical Resistance
The 9th-Street interchange was designed and constructed with an automated electrical heating system for snow and ice removal. This report describes the heating system, its construction, and initial operation. The heating system was capable of keeping the interchange free of ice and snow accumulation. The average daily slab temperature fell below 0°C (32°F) on only one occasion. The average cost of electrical power for heating the interchange was $1,075 per day
Cracking in Concrete Pavement
Cracking of portland cement concrete pavements is a common, even expected, occurrence. To minimize potentially detrimental effects, it is necessary to understand mechanisms that might be used to explain such behavior so that measures may be developed and implemented to control the occurrence of such cracking. Several theories are discussed that might provide the mechanisms of pavement cracking. An alternate meachanism, based on fatigue loading of the concrete by temperature expansions-contrations, for the development of so-called D-cracking is offered
Cracking in Continuously Reinforced Concrete Pavements
The objective of this study was to monitor placement and evaluate performance of continuously reinforced concrete pavement with an emphasis on determining the time of cracking and crack interval. This paper reports on the design and construction practice for CRCP in Kentucky. Data on crack frequency and time of cracking is also included in an attempt to further explain the cracking pattern associated with CRCP
Properties Study of ZnS Thin Films Prepared by Spray Pyrolysis Method
Zinc sulfide (ZnS) is important II-VI semiconductors material for the development of various modern
technologies and photovoltaic applications. ZnS thin film was prepared by using chemical spray pyrolysis
technique. The starting solution is a mixture of 0.1 M zinc chloride as source of Zn and 0.05 M thiourea as
source of S. The glass substrate temperature was varied in the range of 300 °C-400 °C to investigate the influence of substrate temperature on the structure, chemical composition, morphological and optical properties of ZnS films. The DRX analyses indicated that ZnS films have polycrystalline cubic structure with
(111) preferential orientation and grain size varied from 25 to 60 nm, increasing with substrate temperature.
The optical properties of these films have been studied in the wavelength range 300-2500 nm using
UV-VIS spectro-photometer. The ZnS films has a band gap of 3.89 eV-3.96 eV
Properties Study of ZnS Thin Films Prepared by Spray Pyrolysis Method
Zinc sulfide (ZnS) is important II-VI semiconductors material for the development of various modern
technologies and photovoltaic applications. ZnS thin film was prepared by using chemical spray pyrolysis
technique. The starting solution is a mixture of 0.1 M zinc chloride as source of Zn and 0.05 M thiourea as
source of S. The glass substrate temperature was varied in the range of 300 °C-400 °C to investigate the influence of substrate temperature on the structure, chemical composition, morphological and optical properties of ZnS films. The DRX analyses indicated that ZnS films have polycrystalline cubic structure with
(111) preferential orientation and grain size varied from 25 to 60 nm, increasing with substrate temperature.
The optical properties of these films have been studied in the wavelength range 300-2500 nm using
UV-VIS spectro-photometer. The ZnS films has a band gap of 3.89 eV-3.96 eV
ADAM23 (ADAM metallopeptidase domain 23)
Review on ADAM23 (ADAM metallopeptidase domain 23), with data on DNA, on the protein encoded, and where the gene is implicated
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