10,816 research outputs found
Parity Nonconservation in Odd-isotopes of Single Trapped Atomic Ions
We have estimated the size of the light-shifts due to parity nonconservation
(PNC) interactions in different isotopes of Ba+ and Ra+ ions based on the work
of Fortson [Phys. Rev. Lett. 70, 2383 (1993)]. We have used the nuclear spin
independent (NSI) amplitudes calculated earlier by us [Phys. Rev. Lett. 96,
163003 (2006); Phys. Rev. A 78, 050501(R) (2008)] and we have employed the
third order many-body perturbation theory (MBPT(3)) in this work to estimate
the nuclear spin dependent (NSD) amplitudes in these ions. Ra+ is found to be
more favourable than Ba+ for measuring both the NSI and NSD PNC observables.Comment: 5 pages, 1 tabl
Drell-Yan, ZZ, W+W- production in SM & ADD model to NLO+PS accuracy at the LHC
In this paper, we present the next-to-leading order QCD corrections for
di-lepton, di-electroweak boson (ZZ, W+W-) production in both the SM and the
ADD model, matched to the HERWIG parton-shower using the aMC@NLO framework. A
selection of results at the 8 TeV LHC, which exhibits deviation from the SM as
a result of the large extra-dimension scenario are presented.Comment: 12 pages, 10 figures, search sensitivity for the 14 TeV LHC
discussed, version to appear in Eur. Phys. J.
Impact of initial condition on prediction of Bay of Bengal Cyclone 'Viyaru’ - A case study
Accurate prediction of track and intensity of land-falling tropical cyclones is of the great importance in weather prediction in making an effective tropical cyclone warning. This study examines the impact of initial condition on real time prediction of Bay of Bengal cyclone Viyaru. For this purpose, the customized version of Advanced Research core of Weather Research and Forecasting (ARW-WRF) model with two-way interactive double nested model at 27 km and 9 km resolutions is used to predict the storm. The model initial conditions are derived from the FNL analysis and Global Forecasting System (GFS) analysis and the lateral boundary condition is provided every 3 hourly from GFS forecast. The model predicted track and intensity of the storm are compared with the India Meteorological Department (IMD) best-fit track. Results indicate that the track of the storm is reasonably well predicted by the model with both FNL and GFS initial condition. The track of the storm is better predicted by the model with FNL initial condition. It is found that in reference to the track predicted errors with GFS initial condition, the use of FNL initial analysis as condition resulted in 41%, 8%, 5% and 19% improvement respectively in 24 h, 48 h, 72 h and 96 h forecast. This is due to less initial positional error in FNL analysis. The landfall time and location of the storm is also better predicted by the model with FNL initial condition. The trend of intensification and dissipation of the storm is also better predicted with FNL as the initial condition. The intensity of the storm in term of Central Sea Level Pressure (CSLP) and Maximum Surface Wind (MSW) is over-predicted by the model with both initial conditions. The 24 hours accumulated precipitation around the landfall time is also better predicted by the model with FNL initial condition
Diagnostic Dilemma with Interval Death in a Road-Traffic Accident Victim
Background: The cause of death is difficult to interpret in a road-traffic accident (RTA) victim, because multiple injuries make it difficult to decide on the most fatal lesion, particularly when death is delayed by prompt medical intervention; and secondary haemorrhage, renal failure, fat embolism, systemic infections, myocardial or cerebral infarction – all comes under the potential differential threats.Case Report: A 20 year-old RTA victim was hospitalized in a comatose state and died after surviving 21 days on intermittent positive pressure ventilation. Post-mortem examination of different organs revealed pneumonic consolidation in lung, fatty changes in liver and acute tubular necrosis in kidney; in addition to haemorrhage and congestion in these organs and brain.Conclusion: Acute contusions of various internal organs, compounded by hospital-acquired infection and medical interventions turn the overall diagnostic scenario messy in a resuscitated RTA victim. In such condition notification about all lethal organic defects, instead of mentioning mere ‘multiorgan failure’, is the best way to sign out an ‘autopsy report.
Control of postharvest grape rots caused by Aspergillus niger and Botryodiplodia theobromae
Die Bekämpfung der durch Aspergillus niger und Botryodiplodia theobromae an geernteten Trauben verursachten FäulnisTrauben der Sorten Thompson Seedless, Anab-e-Shahi und Kishmish wurden nach der Ernte mit A. niger und B. theobromae - sowohl rein als auch gemischt - infiziert. Die Wirksamkeit verschiedener Nahrungskonservierungsmittel, Pflanzenöle, Wachstumsregulatoren, homoeopathischer Drogen, Antibiotika und Fungizide, vor und nach der Inokulation angewandt, wurde gepriift. Durch die Behandlung der geernteten Trauben mit Bavistin (0,1 % ) + Kaliummetabisulfit (5 % ) könnten hohe wirtschaftliche Verluste vermieden werden
Electric field driven destabilization of the insulating state in nominally pure LaMnO3
We report an electric field driven destabilization of the insulating state in
nominally pure LaMnO3 single crystal with a moderate field which leads to a
resistive state transition below 300 K. The transition is between the
insulating state in LaMnO3 and a high resistance bad metallic state that has a
temperature independent resistivity. The transition occurs at a threshold field
(Eth) which shows a steep enhancement on cooling. While at lower temperatures
the transition is sharp and involves large change in resistance but it softens
on heating and eventually absent above 280K. When the Mn4+ content is increased
by Sr substitution up to x=0.1, the observed transition though observable in
certain temperature range, softens considerably. The observation has been
explained as bias driven percolation type transition between two coexisting
phases, where the majority phase is a charge and orbitally ordered polaronic
insulating phase and the minority phase is a bad metallic phase. The mobile
fraction f of the bad metallic phase deduced from the experimental data follows
an activated kinetics with the activation energy nearly equal to 200 meV and
the prefactor fo is a strong function of the field that leads to a rapid
enhancement of f on application of field leading to the resistive state
transition. We suggest likely scenarios for such co-existing phases in
nominally pure LaMnO3 that can lead to the bias driven percolation type
transition.Comment: Accepted in JPC
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