73 research outputs found
Adjacency Matrix Based Energy Efficient Scheduling using S-MAC Protocol in Wireless Sensor Networks
Communication is the main motive in any Networks whether it is Wireless
Sensor Network, Ad-Hoc networks, Mobile Networks, Wired Networks, Local Area
Network, Metropolitan Area Network, Wireless Area Network etc, hence it must be
energy efficient. The main parameters for energy efficient communication are
maximizing network lifetime, saving energy at the different nodes, sending the
packets in minimum time delay, higher throughput etc. This paper focuses mainly
on the energy efficient communication with the help of Adjacency Matrix in the
Wireless Sensor Networks. The energy efficient scheduling can be done by
putting the idle node in to sleep node so energy at the idle node can be saved.
The proposed model in this paper first forms the adjacency matrix and
broadcasts the information about the total number of existing nodes with depths
to the other nodes in the same cluster from controller node. When every node
receives the node information about the other nodes for same cluster they
communicate based on the shortest depths and schedules the idle node in to
sleep mode for a specific time threshold so energy at the idle nodes can be
saved.Comment: 20 pages, 2 figures, 14 tables, 5 equations, International Journal of
Computer Networks & Communications (IJCNC),March 2012, Volume 4, No. 2, March
201
Illuminating an Ecosystem of Partisan Websites
This paper aims to shed light on alternative news media ecosystems that are
believed to have influenced opinions and beliefs by false and/or biased news
reporting during the 2016 US Presidential Elections. We examine a large,
professionally curated list of 668 hyper-partisan websites and their
corresponding Facebook pages, and identify key characteristics that mediate the
traffic flow within this ecosystem. We uncover a pattern of new websites being
established in the run up to the elections, and abandoned after. Such websites
form an ecosystem, creating links from one website to another, and by `liking'
each others' Facebook pages. These practices are highly effective in directing
user traffic internally within the ecosystem in a highly partisan manner, with
right-leaning sites linking to and liking other right-leaning sites and
similarly left-leaning sites linking to other sites on the left, thus forming a
filter bubble amongst news producers similar to the filter bubble which has
been widely observed among consumers of partisan news. Whereas there is
activity along both left- and right-leaning sites, right-leaning sites are more
evolved, accounting for a disproportionate number of abandoned websites and
partisan internal links. We also examine demographic characteristics of
consumers of hyper-partisan news and find that some of the more populous
demographic groups in the US tend to be consumers of more right-leaning sites.Comment: Published at The Web Conference 2018 (WWW 2018). Please cite the WWW
versio
Self-monitoring, Cultural Training and Prior International Work Experience as Predictors of Cultural Intelligence - a Study of Indian Expatriates
The present study examined the role of self-monitoring, expatriate training, and prior international work experience on the cultural intelligence of expatriates. The data was collected from 223 Indian expatriates through a questionnaire survey. The results of data analysis indicated that self-monitoring has a significant impact on the cultural intelligence of the expatriates. Further analysis was done to examine the effect of these independent variables on individual dimensions of cultural intelligence. The findings signify that self-monitoring has a significant effect on all the three cultural dimensions, namely, cognitive, emotional/motivational and behavioral, and that expatriate training has a significant impact on the emotional/motivational dimension, but not on the other two. Prior international work experience was found not to have a significant effect on cultural intelligence and its dimensions. These findings provide significant insights into organizations for selecting and training the expatriates leading to their effective adjustment and performance in a different culture context. This paper contributes to expatriate management literature highlighting the effect of personality variables along with expatriate training. Further, it is a contribution to the research in cultural intelligence which is a relatively nascent area of research
What Do Healthy Women Know about the Consequences of Delayed Childbearing?
Female fertility declines dramatically with age, and childbearing at older maternal ages has significant medical consequences for mother and infant that are well-known to health professionals. Despite this, the average maternal age in the United States continues to rise. Many factors likely contribute to this secular trend; to date, no research has examined whether American women are aware of the complications of deferring conception and how this correlates with health literacy. The purpose of this study was to evaluate women's knowledge of the implications of delaying pregnancy. A structured, in-person interview was administered to 300 women between 20 and 50 years of age attending 1 of 2 gynecologic clinics at a single institution. Demographic information, medical history, and gynecologic history were obtained; and participants answered questions about the implications of aging for fertility and pregnancy outcome. Health literacy and numeracy were assessed. Participants demonstrated knowledge deficits about the implications of aging on fertility and pregnancy, and many were unfamiliar with success rates of infertility treatments. Several demographic factors correlated with knowledge; health literacy and numeracy were both important predictive variables. To the authors' knowledge, this is the first study of women's knowledge about fertility, aging, and their health literacy. Awareness of the importance of health literacy and numeracy should inform future educational efforts about fertility
Application of Fluorescent CQDs for Enhancing the Performance of Solar Cells and WLEDs
Carbon quantum dots (CQDs) are emerging as promising materials for applications like flexible or transparent solar cell, white light emitting diodes (WLEDs), etc. due to their low cost, eco-friendliness, substantial absorption coefficient, wide absorption spectrum, tuneable optical properties, good charge transfer/separation ability, good quantum yield and large two-photon absorption cross-section. They have been employed in solar cells as active absorbing layers, electron acceptors/donors, electron sinks, electron transporting layers (ETL), hole transporting layers (HTLs), dopants, and interlayer spacing. Consequently, such solar cells have exhibited enhanced performance. In contrast to commercial rare-earth phosphors and traditional semiconductor quantum dots (SQDs) (usually toxic), CQDs exhibit wide range of emission characteristics [full width half maxima (FWHM) > 80 nm]. Interestingly, the emission characteristics of these nanomaterials are tuneable which makes them suitable for WLEDs applications. Red-CQDs are gaining importance as they are required to realize the warm WLEDs. Though a lot of work has been done to modulate the properties of CQDs in order to enhance the performance of solar cells and WLEDs, there are immense possibilities to further exploit the potential of CQDs in these applications
Probing the Physics of Narrow Line Regions in Active Galaxies II: The Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7)
Here we describe the \emph{Siding Spring Southern Seyfert Spectroscopic
Snapshot Survey} (S7) and present results on 64 galaxies drawn from the first
data release. The S7 uses the Wide Field Spectrograph (WiFeS) mounted on the
ANU 2.3m telescope located at the Siding Spring Observatory to deliver an
integral field of ~ arcsec at a spectral resolution of in
the red (nm), and in the blue (nm). {From these data
cubes we have extracted the Narrow Line Region (NLR) spectra from a 4 arc sec
aperture centred on the nucleus. We also determine the H and
[OIII]~5007 fluxes in the narrow lines, the nuclear reddening, the
reddening-corrected relative intensities of the observed emission lines, and
the H and \lOIII\ luminosities {determined from spectra for which the
stellar continuum has been removed.} We present a set of images of the galaxies
in [OIII]~5007, [NII]~6584 and H which serve to
delineate the spatial extent of the extended narrow line region (ENLR) and {\bf
also to} reveal the structure and morphology of the surrounding \HII\ regions.
Finally, we provide a preliminary discussion of those Seyfert~1 and Seyfert~2
galaxies which display coronal emission lines in order to explore the origin of
these lines.Comment: Accepted for publication 9 Jan 2015, Astrophysical Journal
Supplements. 49pages, 8 figure
S7 : Probing the physics of Seyfert Galaxies through their ENLR & HII Regions
Here we present the first results from the Siding Spring Southern Seyfert
Spectroscopic Snapshot Survey (S7) which aims to investigate the physics of
~140 radio-detected southern active Galaxies with z<0.02 through Integral Field
Spectroscopy using the Wide Field Spectrograph (WiFeS). This instrument
provides data cubes of the central 38 x 25 arc sec. of the target galaxies in
the waveband 340-710nm with the unusually high resolution of R=7000 in the red
(530-710nm), and R=3000 in the blue (340-560nm). These data provide the
morphology, kinematics and the excitation structure of the extended narrow-line
region, probe relationships with the black hole characteristics and the host
galaxy, measures host galaxy abundance gradients and the determination of
nuclear abundances from the HII regions. From photoionisation modelling, we may
determine the shape of the ionising spectrum of the AGN, discover whether AGN
metallicities differ from nuclear abundances determined from HII regions, and
probe grain destruction in the vicinity of the AGN. Here we present some
preliminary results and modelling of both Seyfert galaxies observed as part of
the survey.Comment: 6 pages, 2 figures, Invited Talk at the IAU symposium 30
Probing the Physics of Narrow Line Regions in Active Galaxies III: Accretion and Cocoon Shocks in the LINER NGC1052
We present Wide Field Spectrograph (WiFeS) integral field spectroscopy and
HST FOS spectroscopy for the LINER galaxy NGC 1052. We infer the presence of a
turbulent accretion flow forming a small-scale accretion disk. We find a
large-scale outflow and ionisation cone along the minor axis of the galaxy.
Part of this outflow region is photoionised by the AGN, and shares properties
with the ENLR of Seyfert galaxies, but the inner (~arcsec)
accretion disk and the region around the radio jet appear shock excited. The
emission line properties can be modelled by a "double shock" model in which the
accretion flow first passes through an accretion shock in the presence of a
hard X-ray radiation, and the accretion disk is then processed through a cocoon
shock driven by the overpressure of the radio jets. This model explains the
observation of two distinct densities ( and cm),
and provides a good fit to the observed emission line spectrum. We derive
estimates for the velocities of the two shock components and their mixing
fractions, the black hole mass, the accretion rate needed to sustain the LINER
emission and derive an estimate for the jet power. Our emission line model is
remarkably robust against variation of input parameters, and so offers a
generic explanation for the excitation of LINER galaxies, including those of
spiral type such as NGC 3031 (M81).Comment: Accepted for publication in Astrophysical Journal. 16 pages, 12
figure
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