New records of Opisthobranchs (Mollusca: Gastropoda) from Gulf of Mannar, India

1508-1515An extensive survey was carried out to explore the Opisthobranchs and associated faunal community in and around the Gulf of Mannar Marine Biosphere Reserve (GoMBR), South-east coast of India, resulted eight species (Aplysia juliana, Goniobranchus annulatus, Goniobranchus cavae, Goniobranchus collingwoodi, Goniobranchus conchyliatus, Dendrodoris albobrunnea, Elysia nealae, and Thecacera pacifica) which are new records to Indian coastal waters and GoMBR respectively. The detailed description, distribution and morphological characters are presented in this manuscript

Parallel Test Generation With Low Communication Overhead

In this paper we present a method of parallelizing test generation for combinational logic using boolean satisfiability. We propose a dynamic search-space allocation strategy to split work between the available processors. This strategy is easy to implement with a greedy heuristic and is economical in its demand for inter-processor communication. We derive an analytical model to predict the performance of the parallel versus sequential implementations. The effectiveness of our method and analysis is demonstrated by an implementation on a Sequent (shared memory) multiprocessor. The experimental data shows significant performance improvement in parallel implementation, validates our analytical model, and allows predictions of performance for a range of time-out limits and degrees of parallelism

Morphometry of the Dugong Dugon (Muller, 1776) skeleton based on Indian Museum specimens, Kolkata, India

817-821The present study discussed about detailed examination of skeleton characters of four dugong specimens received from Indian Museum. The specimens were deposited and preserved in the National Zoological Collection (ZSI/27608; ZSI/27609; ZSI/27610; ZSI/27611) of The Mammal and Osteological Section, Zoological Survey of India, Kolkata

Ghost Imaging without Discord

Ragy and Adesso argue that quantum discord is involved in the formation of a pseudothermal ghost image. We show that quantum discord plays no role in spatial light modulator ghost imaging, i.e., ghost-image formation based on structured illumination realized with laser light that has undergone spatial light modulation by the output from a pseudorandom number generator. Our analysis thus casts doubt on the degree to which quantum discord is necessary for ghost imaging.United States. Defense Advanced Research Projects Agency (Army Research Office Award W911NF-10-1-0404

Relativistic spin precession in the binary PSR J1141−-6545

PSR J1141$-$6545 is a precessing binary pulsar that has the rare potential to reveal the two-dimensional structure of a non-recycled pulsar emission cone. It has undergone $\sim 25 \deg$ of relativistic spin precession in the $\sim18$ years since its discovery. In this paper, we present a detailed Bayesian analysis of the precessional evolution of the width of the total intensity profile, to understand the changes to the line-of-sight impact angle ($\beta$) of the pulsar using four different physically motivated prior distribution models. Although we cannot statistically differentiate between the models with confidence, the temporal evolution of the linear and circular polarisations strongly argue that our line-of-sight crossed the magnetic pole around MJD 54000 and that only two models remain viable. For both these models, it appears likely that the pulsar will precess out of our line-of-sight in the next $3-5$ years, assuming a simple beam geometry. Marginalising over $\beta$ suggests that the pulsar is a near-orthogonal rotator and provides the first polarization-independent estimate of the scale factor ($\mathbb{A}$) that relates the pulsar beam opening angle ($\rho$) to its rotational period ($P$) as $\rho = \mathbb{A}P^{-0.5}$ : we find it to be $> 6 \rm~deg~s^{0.5}$ at 1.4 GHz with 99\% confidence. If all pulsars emit from opposite poles of a dipolar magnetic field with comparable brightness, we might expect to see evidence of an interpulse arising in PSR J1141$-$6545, unless the emission is patchy.Comment: Accepted for publication in Astrophysical Journal Letter

How to Advertise? Role of Congruence and Involvement on Multiscreen Consumption

It has become increasingly common for consumers to use additional devices while watching TV, a phenomenon called multiscreen viewing. This provides an additional advertising channel for marketers, specifically the second screen. However, it is not without its complexities; marketers must optimally time advertisements on the second screen conditional on the primary screen activity. Using a behavioral experiment this study proposes to investigate how consumers’ engagement and psychological involvement with the program on the primary screen affects their multiscreen behavior and its effect on brand recall. We further expect this relationship to be moderated by the congruence of the advertisement relative to the primary screen. Results of the study will not only contribute to the second screen literature in marketing and Information systems, but also help marketers develop actionable strategies for the second screen in multiscreen viewing contexts

Irrawaddy dolphin (Orcaella brevirostris) washed ashore on Digha Coast, West Bengal, India

239-242The residual population of the Irrawaddy dolphin in India is one of the most vulnerable marine mammals. Stranded dead male animal of Irrawaddy dolphin length from Digha coast with severed tail and centre of the body is reported in this manuscript

A report on rare occurrence of a mushroom coral, Cycloseris cyclolites (Lamarck, 1801) in Gulf of Mannar, India

333-334The frequent heavy–scale climatic oscillations and the recent local disturbances on the reefs worldwide were a menace for biodiversity sustenance. The major concern is that many species of Scleractinian corals could have been lost while being unaware of their existence. The recent survey yielded Cycloseris cyclolites after 29 years in the reef areas of the Gulf of Mannar Marine National Park

Polarization studies of Rotating Radio Transients

We study the polarization properties of 22 known rotating radio transients (RRATs) with the 64-m Parkes radio telescope and present the Faraday rotation measures (RMs) for the 17 with linearly polarized flux exceeding the off-pulse noise by 3$\sigma$. Each RM was estimated using a brute-force search over trial RMs that spanned the maximum measurable range $\pm1.18 \times 10^5 \, \mathrm{rad \, m^2}$ (in steps of 1 $\mathrm{rad \, m^2}$), followed by an iterative refinement algorithm. The measured RRAT RMs are in the range |RM| $\sim 1$ to $\sim 950$ rad m$^{-2}$ with an average linear polarization fraction of $\sim 40$ per cent. Individual single pulses are observed to be up to 100 per cent linearly polarized. The RMs of the RRATs and the corresponding inferred average magnetic fields (parallel to the line-of-sight and weighted by the free electron density) are observed to be consistent with the Galactic plane pulsar population. Faraday rotation analyses are typically performed on accumulated pulsar data, for which hundreds to thousands of pulses have been integrated, rather than on individual pulses. Therefore, we verified the iterative refinement algorithm by performing Monte Carlo simulations of artificial single pulses over a wide range of S/N and RM. At and above a S/N of 17 in linearly polarized flux, the iterative refinement recovers the simulated RM value 100 per cent of the time with a typical mean uncertainty of $\sim5$ rad m$^{-2}$. The method described and validated here has also been successfully used to determine reliable RMs of several fast radio bursts (FRBs) discovered at Parkes.Comment: Submitted to MNRAS, 10 pages, 6 figure