9,186 research outputs found
Development of digital computer program for thermal network correction. Phase 2 - Program development. Phase 3 - Demonstration/application Final report
Developing digital computer program for correcting soft parameters of thermal network by Kalman filtering metho
Designing Courses for Significant Learning: Voices of Experience: New Directions for Teaching and Learning, no. 119
Marice Rose and Roben Torosyan are contributing authors, Integrating Big Questions with Real World Applications: Models from Art History and Philosophy , p. 61-71.
Book Description: Leading researchers and practitioners explore the frontiers of education from an Integral perspective.The educational challenges faced today are driving us toward a new step in the evolution of educational theory and practice. Educators are called to go beyond simply presenting alternatives, to integrating the best of mainstream and alternative approaches and taking them to the next level. Integral Education accomplishes this by bringing together leading researchers and practitioners from higher education who are actively exploring the frontiers of education from an integral perspective. It presents an overview of the emerging landscape of integral education from a variety of theoretical and applied perspectives. Key characteristics of integral education include exploring multiple perspectives, employing different pedagogical techniques (e.g., reflective, dialogical, empirical), combining conceptual rigor with embodied experience, drawing on developmental psychology, and cultivating a reflective and transformative space for students and teachers alike. Integral Education provides the most comprehensive synopsis of this exciting new approach and serves as a valuable resource for any integral effort within education. - Publisher descriptionhttps://digitalcommons.fairfield.edu/visualandperformingarts-books/1000/thumbnail.jp
Time reversal in thermoacoustic tomography - an error estimate
The time reversal method in thermoacoustic tomography is used for
approximating the initial pressure inside a biological object using
measurements of the pressure wave made on a surface surrounding the object.
This article presents error estimates for the time reversal method in the cases
of variable, non-trapping sound speeds.Comment: 16 pages, 6 figures, expanded "Remarks and Conclusions" section,
added one figure, added reference
MAGIC sensitivity to millisecond-duration optical pulses
The MAGIC telescopes are a system of two Imaging Atmospheric Cherenkov
Telescopes (IACTs) designed to observe very high energy (VHE) gamma rays above
~50 GeV. However, as IACTs are sensitive to Cherenkov light in the UV/blue and
use photo-detectors with a time response well below the ms scale, MAGIC is also
able to perform simultaneous optical observations. Through an alternative
system installed in the central PMT of MAGIC II camera, the so-called central
pixel, MAGIC is sensitive to short (1ms - 1s) optical pulses. Periodic signals
from the Crab pulsar are regularly monitored. Here we report for the first time
the experimental determination of the sensitivity of the central pixel to
isolated 1-10 ms long optical pulses. The result of this study is relevant for
searches of fast transients such as Fast Radio Bursts (FRBs).Comment: Proceedings of the 35th International Cosmic Ray Conference (ICRC
2017), Bexco, Busan, Korea (arXiv:1708.05153
Photon State Tomography for Two-Mode Correlated Itinerant Microwave Fields
Continuous variable entanglement between two modes of a radiation field is
usually studied at optical frequencies. As an important step towards the
observation of entanglement between propagating microwave photons we
demonstrate the experimental state reconstruction of two field modes in the
microwave domain. In particular, we generate two-mode correlated states with a
Josephson parametric amplifier and detect all four quadrature components
simultaneously in a two-channel heterodyne setup using amplitude detectors.
Analyzing two-dimensional phase space histograms for all possible pairs of
quadratures allows us to determine the full covariance matrix and reconstruct
the four-dimensional Wigner function. We demonstrate strong correlations
between the quadrature amplitude noise in the two modes. Under ideal conditions
two-mode squeezing below the standard quantum limit should be observable in
future experiments.Comment: 4 pages, 4 figure
A Multinational Analysis of Mutations and Heterogeneity in PZase, RpsA, and PanD Associated with Pyrazinamide Resistance in M/XDR Mycobacterium tuberculosis.
Pyrazinamide (PZA) is an important first-line drug in all existing and new tuberculosis (TB) treatment regimens. PZA-resistance in M. tuberculosis is increasing, especially among M/XDR cases. Noted issues with PZA Drug Susceptibility Testing (DST) have driven the search for alternative tests. This study provides a comprehensive assessment of PZA molecular diagnostics in M/XDR TB cases. A set of 296, mostly XDR, clinical M. tuberculosis isolates from four countries were subjected to DST for eight drugs, confirmatory Wayne's assay, and whole-genome sequencing. Three genes implicated in PZA resistance, pncA, rpsA, and panD were investigated. Assuming all non-synonymous mutations cause resistance, we report 90% sensitivity and 65% specificity for a pncA-based molecular test. The addition of rpsA and panD potentially provides 2% increase in sensitivity. Molecular heterogeneity in pncA was associated with resistance and should be evaluated as a diagnostic tool. Mutations near the N-terminus and C-terminus of PZase were associated with East-Asian and Euro-American lineages, respectively. Finally, Euro-American isolates are most likely to have a wild-type PZase and escape molecular detection. Overall, the 8-10% resistance without markers may point to alternative mechanisms of resistance. Confirmatory mutagenesis may improve the disconcertingly low specificity but reduce sensitivity since not all mutations may cause resistance
Solution to the twin image problem in holography
While the invention of holography by Dennis Gabor truly constitutes an
ingenious concept, it has ever since been troubled by the so called twin image
problem limiting the information that can be obtained from a holographic
record. Due to symmetry reasons there are always two images appearing in the
reconstruction process. Thus, the reconstructed object is obscured by its
unwanted out of focus twin image. Especially for emission electron as well as
for x- and gamma-ray holography, where the source-object distances are small,
the reconstructed images of atoms are very close to their twin images from
which they can hardly be distinguished. In some particular instances only,
experimental efforts could remove the twin images. More recently, numerical
methods to diminish the effect of the twin image have been proposed but are
limited to purely absorbing objects failing to account for phase shifts caused
by the object. Here we show a universal method to reconstruct a hologram
completely free of twin images disturbance while no assumptions about the
object need to be imposed. Both, amplitude and true phase distributions are
retrieved without distortion
Effect of impurity substitution on band structure and mass renormalization of the correlated FeTeSe superconductor
Using angle-resolved photoemission spectroscopy (ARPES), we studied the
effect of the impurity potential on the electronic structure of
FeTeSe superconductor by substituting 10\% of Ni for Fe which
leads to an electron doping of the system. We could resolve three hole pockets
near the zone center and an electron pocket near the zone corner in the case of
FeTeSe, whereas only two hole pockets near the zone center and
an electron pocket near the zone corner are resolved in the case of
FeNiTeSe, suggesting that the hole pocket
having predominantly the orbital character is very sensitive to the
impurity scattering. Upon electron doping, the size of the hole pockets
decrease and the size of the electron pockets increase as compared to the host
compound. However, the observed changes in the size of the electron and hole
pockets are not consistent with the rigid-band model. Moreover, the effective
mass of the hole pockets is reduced near the zone center and of the electron
pockets is increased near the zone corner in the doped
FeNiTeSe as compared to FeTeSe.
We refer these observations to the changes of the spectral function due to the
effect of the impurity potential of the dopants.Comment: 8 pages, 3 figure
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