952 research outputs found
Graph theoretic extension of the Matrix model of an R & D organization
In this paper the matrix model of an R&D organization developed by Dean [1] has been extended to organizations with mixed global objectives based on a graph-theoretic formulation. The extended model can be applied to problems like the maximization of R&D outputs of a number of organizations at the level of either a corporation or a country such that a specified growth in the overall research competence of the entire corporation or the country is maintained
Knowledge and use of electronic information resources by Post graduate Engineering students of Karnataka state: A study
The present study is an attempt to know the knowledge and use of electronic information resources by post graduate engineering students studying in 16 Autonomous engineering colleges of Karnataka state. The study involved 1064 post graduate engineering students and found that 100% students use electronic information resources. The study also revealed that e-journals are the most preferred e-resources and the library notice board along with library websites are the major sources of creating awareness about the availability of e-resources. However, the trial and error method was highly used to use e-resources followed by self-study and library orientation. The study found that keyword search is highly preferred and the VTU consortium is a highly preferred gateway for accessing the e-resources. Engineering students lack the skill of selecting the right search term. Apart from this slow internet connectivity also hinders the effective use of e-resources
Anxiolytic activity of ethanolic and aqueous extract of Ficus carica Linn fruits in swiss albino mice
Background: Benzodiazepams are mainly used to treat anxiety but these drugs produce serious adverse effects, hence herbal drugs are preferred. The present study was undertaken to evaluate the anti-anxiety activity of ethanolic and aqueous extract of Ficus carica (FC) Linn fruits in swiss albino mice.Methods: Male swiss albino rats weighing 25-30gms were divided into six groups and six animals in each group. Diazepam (1.0 mg/kg), AEFC (200 and 400 mg/kg) and EEFC (200 and 400 mg/kg) were suspended in 1% gum acacia and administered orally. The EEFC and AEFC (both extracts at 200 and 400mg/kg/p.o) and vehicle were administered for 7 days once daily p.o. and the last dose was given on the 7lh day, 60 min prior to exposure to the experimental paradigms viz., Elevated plus maze, T- maze model and Hole -board model.Results: Both the extracts of FC significantly increased the number of entries into, time spent and rears in the open arms. Also, it increased the percentile ratio of open arm to total arm entries in elevated plus maze. In T- maze, the both the extracts FC showed a significant increase in baseline latency and decrease in escape and avoidance. In the hole-board model a significant increase in the exploratory behavior like head-dipping and line crossing, rearing was observed after treatment with EEFC and AEFC. FC also decreases the nor-adrenaline levels and increase in serotonin and dopamine levels in the brain. These behavioural changes were significantly higher than that produced by the standard anxiolytic drug diazepam.Conclusions: It was concluded that ethanolic and aqueous extracts of Ficus carica fruits having antianxiety activity
Generation of hyperentangled states and two-dimensional quantum walks using - ()- plates and polarization beamsplitters
A single photon can be made to entangle simultaneously in its different
internal degrees of freedom (DoF) -- polarization, orbital angular momentum
(OAM), and frequency -- as well as in its external DoF -- path. Such
entanglement in multiple DoF is known as hyperentanglement and provide
additional advantage for quantum information processing. We propose a passive
optical setup using -plates and polarization beamsplitters to hyperentangle
an incoming single photon in polarization, OAM, and path DoF. By mapping
polarization DoF to a two-dimensional coin state, and path and OAM DoF to two
spatial dimensions, and , we present a scheme for realization of
two-dimensional discrete-time quantum walk using only polarization
beamsplitters and -plates ensuing the generation of hyperentangled states.
The amount of hyperentanglement generated is quantified by measuring the
entanglement negativity between any two DoF. We further show the
hyperentanglement generation can be controlled by using an additional coin
operation or by replacing the -plate with a -plate.Comment: A new appendix has been included, where Jones matrices are realized
using -plates and variable waveplate
Silent meningioma: a cause of quadriperesis in total knee arthroplasty
Total knee arthroplasty (TKA) is a treatment for end stage osteoarthritis. Majority of them in the older age group with associated co-morbidities and increased the risk for stroke. Asymptomatic meningiomas may become symptomatic and presents with variable symptoms depending on the size and location of the tumour. We report a case of a 58 years old lady who underwent bilateral TKA under combined spinal epidural anaesthesia with an uneventful post-operative course with post-operative analgesia. Patient developed dysphasia and weakness in upper and lower limbs. Following computed tomography of the brain revealed a meningioma in the falx region. Patient treated with steroid and underwent elective surgery for meningioma without any complications. Asymptomatic brain tumours can become symptomatic after surgery and urgent initiation of neurologic evaluation and strong recommendation to initiate intracranial pressure management oriented therapy in time.
Quantum conditional mutual information of W state in non-inertial frames
Quantum conditional mutual information (QCMI) is a versatile information
theoretic measure. It is used to find the amount of correlations between two
qubits from the perspective of a third qubit. In this work we characterise the
QCMI of tripartite W-states when some of the qubits are under accelerated
motion. Here for our investigations we consider a massless fermionic field in
the single mode approximation. We consider all possible situations with respect
to acceleration of the qubits. From our results we observe that QCMI can either
increase or decrease depending on the role of the qubit being accelerated.
Finally we discuss the connection between QCMI and correlations by studying the
biseparable and separable states.Comment: 22 pages, 6 figure
Generic quantum walk using a coin-embedded shift operator
The study of quantum walk processes has been widely divided into two standard
variants, the discrete-time quantum walk (DTQW) and the continuous-time quantum
walk (CTQW). The connection between the two variants has been established by
considering the limiting value of the coin operation parameter in the DTQW, and
the coin degree of freedom was shown to be unnecessary [26]. But the coin
degree of freedom is an additional resource which can be exploited to control
the dynamics of the QW process. In this paper we present a generic quantum walk
model using a quantum coin-embedded unitary shift operation . The
standard version of the DTQW and the CTQW can be conveniently retrieved from
this generic model, retaining the features of the coin degree of freedom in
both variants.Comment: 5 pages, 1 figure, Publishe
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