4,207 research outputs found
Alignments of parity even/odd-only multipoles in CMB
We compare the statistics of parity even and odd multipoles of the cosmic
microwave background (CMB) sky from PLANCK full mission temperature
measurements. An excess power in odd multipoles compared to even multipoles has
previously been found on large angular scales. Motivated by this apparent
parity asymmetry, we evaluate directional statistics associated with even
compared to odd multipoles, along with their significances. Primary tools are
the \emph{Power Tensor} and \emph{Alignment Tensor} statistics. We limit our
analysis to the first sixty multipoles i.e., . We find no evidence
for statistically unusual alignments of even parity multipoles. More than one
independent statistic finds evidence for alignments of anisotropy axes of odd
multipoles, with a significance equivalent to or more. The
robustness of alignment axes is tested by making galactic cuts and varying the
multipole range. Very interestingly, the region spanned by the (a)symmetry axes
is found to broadly contain other parity (a)symmetry axes previously observed
in the literature.Comment: 13 pages, 13 figures, Matches the version accepted in MNRA
Numerical approach for retention characteristics of double floating-gate memories
We report on a numerical investigation in which memory characteristics of
double floating-gate (DFG) structure were compared to those of the conventional
single floating-gate structure, including an interference effect between two
cells. We found that the advantage of the DFG structure is its longer retention
time and the disadvantage is its smaller threshold voltage shift. We also
provide an analytical form of charging energy including the interference
effect.Comment: 4 pages, 4 figure
The Decompensating Pediatric Inpatient Simulation Scenarios
Introduction: In July of 2009, Childrenās National Medical Center (CNMC) Hospitalist and Emergency Department (ED) educators collaborated to create and implement unique simulation scenarios for trainees rotating on the pediatric hospitalist teams. The goal of this educational intervention is to teach and allow rehearsal of an approach to the unstable patient across three scenarios. Trainees use this high-fidelity, low-risksimulation to apply targeted clinical reasoning and their initial assessment and management strategies to core clinical problems. The three scenarios included in this resource cover altered mental status and seizure, respiratory distress and anaphylaxis, and refractory status asthmaticus, respectively.
Methods:This resource contains a template, simulator technologist information, scenario progression, and guided discussion for three scenarios of worsening pediatric inpatients. Each case simulation and debriefing is intended to take approximately 30 to 45 minutes.
Results: Within six months of implementation, the monthly simulation scenario series logged over 85 learner encounters at CNMC with uniformly positive evaluations indicating that learners subjectively felt that their competence in the assessment and management of unstable inpatients was improving. As trainees become even more proficient at timely recognition of sick patients, appropriate initial management, education, patient care, and safety outcomes are expected to improve.
Discussion: The goal of this educational intervention is to teach and allow rehearsal of an approach to the unstable patient. Simulation such as this provide the opportunity to assess learnersā competency with specific skills as long as rubrics for evaluation are created and applied to similar scenarios.
AAMC MedEdPORTAL publication ID 7993. Link to original
SecureDBaaS Model for Accessing Encrypted Cloud Databases
Cloud computing has recently emerged being a compelling paradigm that pertains to managing and delivering services over the web. The particular prevalent problem connected with cloud is confidentiality, security, as well as reliability etc., in which how the cloud provider assures. To recognize this, a novel architecture is usually introduced that will integrates cloud database services and as well executing concurrent operations on encrypted information. Also a new homomorphic encryption algorithm will likely be incorporated to offer confidentiality as well as concurrent execution of various SQL operations. This will be the first option supporting quite a few stributed clienteles to access encrypted cloud databases. One of main thing is that it eliminates advanced proxies in between cloud user and provider. The performance on the architecture is usually lculated by means of theoretical and practical results which are subjected to TPC-C benchmark standard tools for a number of clients as well as network latencies
Characterization of the first hexacoordinate phosphorus compound with SāPāS bonds
The first example of a hexacoordinate phosphorus compound [S{6-t-Bu-4-Me-C6H2O}2]2P+(Cl-· C3H4N2) with two S→P bonds is reported. This compound can be construed as an oxophosphonium salt with double intramolecular coordination by sulfur atoms. X-ray structure reveals a facial arrangement of the ligands with two coordinating sulfur atoms cis to each other. The S→P distance of 2.334 (1) Å is one among very short coordinate bond distances between sulfur and phosphorus
Experimental Study on the Effect of Cement and Sand Replacement with Red Mud and Quarry Dust in Cement Concrete Pavements
The main objective of the project is experimental study of the possibility of utilizing the waste red mud (bauxite residue) and quarry dust in cement concrete. Red mud is a by-product produced in the process of extraction of aluminium from bauxite. The red mud generated by this process is highly alkaline with a pH usually ranging from 10 to 12. It leads to serious environmental problems. Worldwide there are approximately 80 to 90 million tons of red mud is being generated every year. The production of 1 ton aluminium generates 1-2 tonnes of red mud. The storage of red mud is economically and environmentally problematic due to the risk of contamination of natural resources and living organisms. Red mud can be used in replacement of cement in concrete. The quarry dust which is available from local resources can be used as a replacement of river sand in a conventional concrete pavements. This study aims at describing such utilization and their effective usage in concrete. Experiments have been conducted under laboratory conditions to assess the compressive strength and flexural strength of the concrete cubes made of red mud and quarry dust. By conducting the model tests we can replace the 15% of cement with red mud and 30% of sand with quarry dust
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