1,401 research outputs found
Faith: A New Component within Differentiated Instruction
This qualitative study utilized student self-reports to Differentiate Instruction by Faith at a Christian college in central, PA. A brief survey was administered to 21 students. The students were asked to report how they preferred to engage in gracious Christian worship while in class, based on their unique faith practices. Data demonstrates that an even distribution of students (n = 7) reported preferring the practices of public prayer, silent devotion, or inspirational passage readings. Results further support the use of Faith differentiation in the Christian college classroom
Quasiparticle density of states in BiSrCaCuO single crystals probed using tunneling spectroscopy at ultra-low temperatures in high magnetic fields
Break-junction tunneling spectroscopy at temperatures 30-50 mK in high
magnetic field is used to directly probe the quasiparticle density of states
within the energy gap in a single crystal Bi2212 high- superconductor. The
measured tunneling conductances in the subgap region have a zero
flat region with no evidence for a linear increase of the density of states
with voltage. A number of tunnel break-junctions exhibited curves
with a second energy gap structure at the average magnitude 2 mV. Our data cannot be explained by either a pure pairing or a
pure pairing
In-plane current-voltage characteristics and oscillatory Josephson-vortex flow resistance in La-free BiSrCuO single crystals in high magnetic fields
We have investigated the in-plane characteristics and the Josephson
vortex flow resistance in high-quality La-free
BiSrCuO (Bi2201) single crystals in parallel and
tilted magnetic fields at temperatures down to 40 mK. For parallel magnetic
fields below the resistive upper critical field , the
characteristic obey a power-law with a smooth change with increasing
magnetic-field of the exponent from above 5 down to 1. In contrast to the
double-layer cuprate Bi2212, the observed smooth change suggests that there is
no change in the mechanism of dissipation (no Kosterlitz-Thouless transition)
over the range of temperatures investigated. At small angles between the
applied field and the -plane, prominent current steps in the
characteristics and periodic oscillations of Josephson-vortex flow resistance
are observed. While the current steps are periodic in the voltage at constant
fields, the voltage position of the steps, together with the flux-flow voltage,
increases nonlinearly with magnetic field. The -flow resistance oscillates
as a function of field with a constant period over a wide range of magnetic
fields and temperatures. The current steps in the characteristics and
the flow resistance oscillations can be linked to the motion of Josephson
vortices across layers
Graduate Student Preferences for Practicing Faith in Online Coursework
The purpose of this investigation was to gain a better understanding of the expectations graduate students hold regarding the amount of and types of faith-related activities utilized in online coursework. Two groups of participants surveyed were enrolled at two different, faith-based institutions in Pennsylvania, United States; one a Catholic university and one a Christian college. Results of the survey and subsequent response analysis indicated that 82% of the students preferred the instructor utilize faith activities more frequently in online coursework, despite having enrolled at the institution for its academic reputation
Second order resonant Raman scattering in single layer tungsten disulfide (WS)
Resonant Raman spectra of single layer WS flakes are presented. A
second order Raman peak (2LA) appears under resonant excitation with a
separation from the E mode of only cm. Depending on the
intensity ratio and the respective line widths of these two peaks, any analysis
which neglects the presence of the 2LA mode can lead to an inaccurate
estimation of the position of the E mode, leading to a potentially
incorrect assignment for the number of layers. Our results show that the
intensity of the 2LA mode strongly depends on the angle between the linear
polarization of the excitation and detection, a parameter which is neglected in
many Raman studies.Comment: 6 pages, 4 figure
Magnetic properties of GaMnAs single layers and GaInMnAs superlattices investigated at low temperature and high magnetic field
Magnetotransport properties of GaMnAs single layers and InGaMnAs/InGaAs
superlattice structures were investigated at temperatures from 4 K to 300 K and
magnetic fields up to 23 T to study the influence of carriers confinement
through different structures. Both single layers and superlattice structures
show paramagnetic-to-ferromagnetic phase transition. In GaMnAs/InGaAs
superlattice beside the Curie temperature (Tc ~ 40 K), a new phase transition
is observed close to 13 K.Comment: 8 pages, 5 figures, Proceedings of the XXXII International School on
the Physics of Semiconducting Compounds, Jaszowiec 2003, Polan
The hole Fermi surface in BiSe probed by quantum oscillations
Transport and torque magnetometry measurements are performed at high magnetic
fields and low temperatures in a series of p-type (Ca-doped) BiSe
crystals. The angular dependence of the Shubnikov-de Haas and de Haas-van
Alphen quantum oscillations enables us to determine the Fermi surface of the
bulk valence band states as a function of the carrier density. At low density,
the angular dependence exhibits a downturn in the oscillations frequency
between and , reflecting a bag-shaped hole Fermi surface.
The detection of a single frequency for all tilt angles rules out the existence
of a Fermi surface with different extremal cross-sections down to ~meV.
There is therefore no signature of a camel-back in the valence band of our bulk
samples, in accordance with the direct band gap predicted by calculations.Comment: A supplemental material file giving a more detailed description of
our work is available upon reques
Heat transport in Bi_{2+x}Sr_{2-x}CuO_{6+\delta}: departure from the Wiedemann-Franz law in the vicinity of the metal-insulator transition
We present a study of heat transport in the cuprate superconductor
Bi_{2+x}Sr_{2-x}CuO_{6+\delta} at subkelvin temperatures and in magnetic fields
as high as 25T. In several samples with different doping levels close to
optimal, the linear-temperature term of thermal conductivity was measured both
at zero-field and in presence of a magnetic field strong enough to quench
superconductivity. The zero-field data yields a superconducting gap of
reasonable magnitude displaying a doping dependence similar to the one reported
in other families of cuprate. The normal-state data together with the results
of the resistivity measurements allows us to test the Wiedemann-Franz(WF) law,
the validity of which was confirmed in an overdoped sample in agreement with
previous studies. In contrast, a systematic deviation from the WF law was
resolved for samples displaying either a lower doping content or a higher
disorder. Thus, in the vicinity of the metal-insulator cross-over, heat
conduction in the zero-temperature limit appears to become significantly larger
than predicted by the WF law. Possible origins of this observation are
discussed.Comment: 9 pages including 7 figures, submitted to Phys. Rev.
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