3,096 research outputs found
Modeling an elastic beam with piezoelectric patches by including magnetic effects
Models for piezoelectric beams using Euler-Bernoulli small displacement
theory predict the dynamics of slender beams at the low frequency accurately
but are insufficient for beams vibrating at high frequencies or beams with low
length-to-width aspect ratios. A more thorough model that includes the effects
of rotational inertia and shear strain, Mindlin-Timoshenko small displacement
theory, is needed to predict the dynamics more accurately for these cases.
Moreover, existing models ignore the magnetic effects since the magnetic
effects are relatively small. However, it was shown recently \cite{O-M1} that
these effects can substantially change the controllability and stabilizability
properties of even a single piezoelectric beam. In this paper, we use a
variational approach to derive models that include magnetic effects for an
elastic beam with two piezoelectric patches actuated by different voltage
sources. Both Euler-Bernoulli and Mindlin-Timoshenko small displacement
theories are considered. Due to the magnetic effects, the equations are quite
different from the standard equations.Comment: 3 figures. 2014 American Control Conference Proceeding
Electroweak Theory and Noncommutative Geometry
The noncommutative generalisation of the standard electroweak model due to
Balakrishna, Gursey and Wali is formulated in terms of the derivations
Der_2(M_3) of a three dimensional representation of the su(2) Lie algebra of
weak isospin. A light Higgs boson of mass about 130 GeV, together with four
very heavy scalar bosons are predicted.Comment: 11 pages, LATEX, no figures. Talk given at the 2nd Gursey Memorial
Conference, June 2000, Istanbu
Monetary policy transmission mechanisms and currency unions A vector error correction approach to a Trans-Tasman currency union
Differences in transmission mechanisms can generate asymmetric behaviour among currency union partners when they experience shocks. This has the potential to widen existing cyclical variation between members of a currency union. Our analysis suggests that the transmission mechanisms of GDP and the CPI of a monetary shock appear to be similar in Australia and New Zealand. However, there are differences in terms of the size of the responses of some variables to identical monetary policy shocks. In a currency union with a different exchange rate pattern and with different monetary policy shocks, New Zealand may experience some new challenges.Impulse responses; vector error correction; monetary transmission mechanism
Fate of the Universe, Age of the Universe, Dark Matter, and the Decaying Vacuum Energy
It is shown that in the cosmological models based on a vacuum energy decaying
as a^{-2}, where a is the scale factor of the universe, the fate of the
universe in regard to whether it will collapse in future or expand forever is
determined not by the curvature constant k but by an effective curvature
constant k_{eff}. It is argued that a closed universe with k=1 may expand
forever, in other words simulate the expansion dynamics of a flat or an open
universe because of the possibility that k_{eff}=0 or -1, respectively. Two
such models, in one of which the vacuum does not interact with matter and in
another of which it does, are studied. It is shown that the vacuum equation of
state p_{vac}= -\rho_{vac} may be realized in a decaying vacuum cosmology
provided the vacuum interacts wuth matter. The optical depths for gravitational
lensing as a function of the matter density and other parameters in the models
are calculated at a source redshift of 2. The age of the universe is discussed
and shown to be compatible with the new Hipparcos lower limit of 11Gyr. The
possibility that a time-varying vacuum energy may serve as dark matter is
suggested.Comment: AAS LaTex, 29 pages, published in the Astrophysical Journal, 520, 45,
199
Modeling and simulation of the ferroelectric based micro gyroscope: FEM analysis
Cataloged from PDF version of article.This paper presents the design and modeling of micro-electromechanical systems (MEMS) on the ternary ferroelectric compounds (PZT) based by using finite element model (FEM) simulation. The conceptual framework establishes five steps to perform the critical analysis: design a novel structure, define the failure mechanisms under the given conditions, analyze different vibrations, analyze the operation principle, and detect resonance modes. In addition, MEMS failure modes were analyzed under different scenarios and the obtained results discussed
Genomic Sequencing Data Analysis Workflow for Bioinformatics Core Facilities
Next Generation Sequencing (NGS) is becoming a common tool in the practice of biomedical research and the future of how medicine will be practiced. To keep up with the explosion in new NGS experiments and the growing need in data analysis, we identified bottlenecks of our NGS data analysis workflow, evaluated and tested feasibility of solutions. To address main bottlenecks we incorporated two solutions into our
workflow: (1) Globus Genomics, a well-maintained cloud based sequencing data analysis framework which leverage advanced tools and data management, and (2) GenomAnalytics from GenomOncology, an interactive platform for data integration, annotation, filtering an interpretation. We also evaluated current methods, and developed Standard Operation Procedures (SOPs) for the most common data types; RNA-seq, exome-seq, and whole genome resequencing. This workflow provides high quality, standardized, and low-cost NGS data analysis in a reasonably short turnaround time to all investigators. The system is self-sustaining and scalable to process larger number of samples with minimal need for additional personnel.https://fuse.franklin.edu/ss2014/1045/thumbnail.jp
Poster 101 Pediatric Mononeuritis Multiplex Secondary to a Nonsystemic Vasculitis: A Case Report
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/147008/1/pmr2s203a.pd
A Research of nasal methicillin resistant/sensitive Staphylococcus aureus and pharyngeal beta-haemolytic Streptococcus carriage in midwifery students in Kahramanmaras, Eastern Mediterranean Region of Turkey
Background: In the hospitals where hygienic conditions are not provided, nasal methicillin resistant/sensitive Staphylococcus aureus (MRSA/MSSA) colonization is seen in the hospital personnel and patients. Both the individualsâ themselves being MRSA/MSSA carriers and also other people around them are under risk and this bacterium leads to nasal colonization and then can propagate through contaminated hands and hospital materials.Objective: In this study, it was aimed to research MRSA/MSSA and beta-haemolytic streptococcus (BHS) carriage in the nose and throat flora of students of, School of Health.Methods: In the study, total of 160 midwifery students taking midwifery education was included in the research but 135 (84.4 %) out of 160 students were able to be reached. The nose and throat swab samples taken from students were examined through microbiological methods.Results: 14.1 % of students were nasal MSSA carrier. While there wasn't the nasal MRSA carrier among students attending the study in the 1st and 2nd class, 3.3 % (1 person) of the 3rd class students and 10.0 % (3 people) of the 4th class students were the nasal MRSA carrier. In addition, BHS carriage was determined in 1.5 % of students and there wasn't any difference between classes.Conclusions: These results indicate that midwifery students might have been contaminated with MSSA/MRSA during clinical practice. That MSSA/MRSA being an important pathogen is seen in midwifery students taking education in the birth units threatens the mother-child health. [Ethiop. J. Health Dev. 2010;24(1):57-60
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