3,073 research outputs found
Phosphorene-AsP Heterostructure as a Potential Excitonic Solar Cell Material - A First Principles Study
Solar energy conversion to produce electricity using photovoltaics is an
emerging area in alternative energy research. Herein, we report on the basis of
density functional calculations, phosphorene/AsP heterostructure could be a
promising material for excitonic solar cells (XSCs). Our HSE06 functional
calculations show that the band gap of both phosphorene and AsP fall exactly
into the optimum value range according to XSCs requirement. The calculated
effective mass of electrons and holes show anisotropic in nature with effective
masses along -X direction is lower than the -Y direction
and hence the charge transport will be faster along -X direction. The
wide energy range of light absorption confirms the potential use of these
materials for solar cell applications. Interestingly, phosphorene and AsP
monolayer forms a type-II band alignment which will enhance the separation of
photogenerated charge carriers and hence the recombination rate will be lower
which can further improve its photo-conversion efficiency if one use it in
XSCs
Bridge Correlational Neural Networks for Multilingual Multimodal Representation Learning
Recently there has been a lot of interest in learning common representations
for multiple views of data. Typically, such common representations are learned
using a parallel corpus between the two views (say, 1M images and their English
captions). In this work, we address a real-world scenario where no direct
parallel data is available between two views of interest (say, and )
but parallel data is available between each of these views and a pivot view
(). We propose a model for learning a common representation for ,
and using only the parallel data available between and
. The proposed model is generic and even works when there are views
of interest and only one pivot view which acts as a bridge between them. There
are two specific downstream applications that we focus on (i) transfer learning
between languages ,,..., using a pivot language and (ii)
cross modal access between images and a language using a pivot language
. Our model achieves state-of-the-art performance in multilingual document
classification on the publicly available multilingual TED corpus and promising
results in multilingual multimodal retrieval on a new dataset created and
released as a part of this work.Comment: Published at NAACL-HLT 201
A United Kingdom survey of surgical technique and handling practice of inguinal canal structures during hernia surgery
Background: Recent trials have assessed the impact of elective nerve division on patient outcome after inguinal herniorrhaphy. The aim of this study was to establish UK surgical practice of handling of structures in the inguinal canal during herniorrhaphy. Methods: A cross-sectional survey of all Fellows (n = 1113) of the Association of Surgeons of Great Britain and Ireland (ASGBI) was performed. The main outcomes were to determine method of inguinal hernia repair and routine practice for intra-operative handling of structures in the inguinal canal. Results: A total of 852 (77%) questionnaires were returned, of which 784 (92%) surgeons performed inguinal herniorrhaphy. Approximately two-thirds (63%) of responding surgeons performed less than 50 procedures per annum and 37% conducted more than 50 procedures annually. Mesh was the preferred method used by 90% of surgeons; 6% used non-mesh, and 4% used other (laparoscopic) methods. Routine practice in relation to the inguinal structures varied by volume of hernia surgery; surgeons who conducted more than 50 procedures annually were more likely to visualize and preserve inguinal nerve structures. However, inconsistency in the answers suggested confusion over anatomy. Conclusion: This is the first UK survey to investigate method of hernia repair and usual handling practice of inguinal canal structures. There was wide acceptance of the use of mesh in inguinal hernia repair, with the majority of UK surgeons favoring an open approach. Surgeons performing high volumes of herniorrhaphy were more likely to preserve, rather than transect, inguinal nerve structures. This variation in practice may confound assessment of long-term neuralgia and other post-herniorrhaphy pain syndromes
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.
Unparticle physics in diphoton production at the CERN LHC
We have considered the di-photon production with unparticle at LHC. The
contributions of spin-0 and spin-2 unparticle to the di-photon production are
studied in the invariant mass and other kinematical distributions, along with
their dependencies on the model dependent parameters. The signal corresponding
to the unparticle is significant for moderate coupling constant values.Comment: 17 pages, 15 eps figure
Pseudo-scalar Higgs Boson Production at Threshold NLO and NLL QCD
We present the first results on the production of pseudo-scalar through gluon
fusion at the LHC to NLO in QCD taking into account only soft gluon
effects. We have used the effective Lagrangian that describes the coupling of
pseudo-scalar with the gluons in the large top quark mass limit. We have used
recently available quantities namely the three loop pseudo-scalar form factor
and the third order universal soft function in QCD to achieve this. Along with
the fixed order results, we also present the process dependent resummation
coefficient for threshold resummation to NLL in QCD. Phenomenological
impact of these threshold NLO corrections to pseudo-scalar production at
the LHC is presented and their role to reduce the renormalisation scale
dependence is demonstrated.Comment: 34 pages, 17 figure
Evaluation of mechanical and corrosive properties of aluminium AA7075 metal matrix composites
Composites are most successful materials used for recent works in the industries. Metal composites possess significantly improved properties including high tensile strength , toughness, hardness, low density and good wear resistance compared to alloys or any other metals .By increasing the content of Zirconium and Chromium in AA 7075 metal matrix composites corrosion resistance is increased. Modified stir casting method is used for the even distribution of Zirconium and Chromium in AA7075 metal matrix composites. Ultimate tensile strength of AA7075 metal matrix composite improved by increasing the content of Zirconium and compared with unreinforced alloy of aluminum. Hardness and tensile strength of AA7075 composites is increased where ductility is decreased .Hence composites AA7075 metal matrix to enhance the mechanical and physical properties for widely used in the automobile and spacecraft applications to improve fuel efficiency. Aluminum metal matrix composites are being used in place of cast iron and steel due to their light weight and high strength
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