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 JJ- (qq)- 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 $q$-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, $x$ and $y$, we present a scheme for realization of two-dimensional discrete-time quantum walk using only polarization beamsplitters and $q$-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 $q$-plate with a $J$-plate.Comment: A new appendix has been included, where Jones matrices are realized using $J$-plates and variable waveplate

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 $U_{C}$. 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

Disordered quantum walk-induced localization of a Bose-Einstein condensate

We present an approach to induce localization of a Bose-Einstein condensate in a one-dimensional lattice under the influence of unitary quantum walk evolution using disordered quantum coin operation. We introduce a discrete-time quantum walk model in which the interference effect is modified to diffuse or strongly localize the probability distribution of the particle by assigning a different set of coin parameters picked randomly for each step of the walk, respectively. Spatial localization of the particle/state is explained by comparing the variance of the probability distribution of the quantum walk in position space using disordered coin operation to that of the walk using an identical coin operation for each step. Due to the high degree of control over quantum coin operation and most of the system parameters, ultracold atoms in an optical lattice offer opportunities to implement a disordered quantum walk that is unitary and induces localization. Here we present a scheme to use a Bose-Einstein condensate that can be evolved to the superposition of its internal states in an optical lattice and control the dynamics of atoms to observe localization. This approach can be adopted to any other physical system in which controlled disordered quantum walk can be implemented.Comment: 6 pages, 4 figures, published versio