311 research outputs found
Automatically Generating Interfaces for Personalized Interaction with Digital Libraries
We present an approach to automatically generate interfaces supporting personalized interaction with digital libraries; these interfaces augment the user-DL dialog by empowering the user to (optionally) supply out-of-turn information during an interaction, flatten or restructure the dialog, and inquire about dialog options. Interfaces generated using this approach for CITIDEL are described
Strongly correlated superconductivity in Rh<SUB>17</SUB>S<SUB>15</SUB>
In this work, we show the highly correlated nature of the superconductor Rh17S15 via transport, magnetization and heat capacity measurements. In particular, we will discuss resistivity, susceptibility, heat-capacity and upper critical field studies on a polycrystalline Rh17S15 sample which exhibits superconductivity below 5.4 K. Detailed studies suggest that the superconductivity in this compound arises from strongly correlated charge carriers presumably due to the high density of states of Rh d-bands at the Fermi level. Moreover, the Hall coefficient shows a sign change and increases at low temperature before the sample becomes a superconductor below 5.4 K
Vortex phase diagram in weakly pinned Rh<SUB>17</SUB>S<SUB>15</SUB>
A vortex phase diagram of the strongly correlated superconductor Rh17S15 has been constructed via exploration of the anomalous variations in critical current density extracted from ac and dc magnetization measurements. The isofield in-phase ac susceptiblity data reveal the presence of multiple steps at different fields. The dc magnetisation hysteresis loops show the presence of a very broad fishtail commencing deep inside the mixed state and lasting upto Hc2. We have also analysed the scan rate dependence of the hysteresis width in the vibrating sample magnetometer data with a view to distinguish between the different possible order-disorder transformations in the flux line lattice
Use of antibacterial nanoparticles in Endodontics
Several root canal irrigants and medicaments are available to combat endodontic pathogens. However, evidence
of complete elimination of these pathogens by the use of
these solutions is not recorded in the literature. The possible development of resistant bacterial species is one of
the problems related to the efficacy of the currently available irrigants and medicaments. In addition, the complex
anatomy of the root canal system allows endodontic pathogens to be hidden in areas inaccessible to the action of
the irrigating preparations. This is further enhanced by the
protective layer that is formed by the remnants of pulp
tissue, dentin powder and dead cells which inhibit the antibacterial activity of the root canal irrigants and medicaments. Antimicrobial nanoparticles show promising effect
against resistant pathogens in pharmaceutical science as
a result of their unique physio-chemical properties. Unlike
traditionally used antimicrobial agents, these nanoparticles destroy bacterial cells through multiple mechanisms.
The concept of using nanoparticles in endodontics as a
new treatment modality was developed recently and their
antibacterial efficacy against endodontic pathogens was
evaluated by several researchers in many
in vitro studies.
This article reviews some of the currently available literature on laboratory studies that evaluated the efficacy of
nanoparticles against endodontic pathogens
Using Hierarchical Data Mining to Characterize Performance of Wireless System Configurations
This paper presents a statistical framework for assessing wireless systems
performance using hierarchical data mining techniques. We consider WCDMA
(wideband code division multiple access) systems with two-branch STTD (space
time transmit diversity) and 1/2 rate convolutional coding (forward error
correction codes). Monte Carlo simulation estimates the bit error probability
(BEP) of the system across a wide range of signal-to-noise ratios (SNRs). A
performance database of simulation runs is collected over a targeted space of
system configurations. This database is then mined to obtain regions of the
configuration space that exhibit acceptable average performance. The shape of
the mined regions illustrates the joint influence of configuration parameters
on system performance. The role of data mining in this application is to
provide explainable and statistically valid design conclusions. The research
issue is to define statistically meaningful aggregation of data in a manner
that permits efficient and effective data mining algorithms. We achieve a good
compromise between these goals and help establish the applicability of data
mining for characterizing wireless systems performance
BSML: A Binding Schema Markup Language for Data Interchange in Problem Solving Environments (PSEs)
We describe a binding schema markup language (BSML) for describing data
interchange between scientific codes. Such a facility is an important
constituent of scientific problem solving environments (PSEs). BSML is designed
to integrate with a PSE or application composition system that views model
specification and execution as a problem of managing semistructured data. The
data interchange problem is addressed by three techniques for processing
semistructured data: validation, binding, and conversion. We present BSML and
describe its application to a PSE for wireless communications system design
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