2,317 research outputs found
A Novel Hybrid Spotted Hyena-Swarm Optimization (HS-FFO) Framework for Effective Feature Selection in IOT Based Cloud Security Data
Internet of Things (IoT) has gained its major insight in terms of its deployment and applications. Since IoT exhibits more heterogeneous characteristics in transmitting the real time application data, these data are vulnerable to many security threats. To safeguard the data, machine and deep learning based security systems has been proposed. But this system suffers the computational burden that impedes threat detection capability. Hence the feature selection plays an important role in designing the complexity aware IoT systems to defend the security attacks in the system. This paper propose the novel ensemble of spotted hyena with firefly algorithm to choose the best features and minimise the redundant data features that can boost the detection system's computational effectiveness. Firstly, an effective firefly optimized feature correlation method is developed. Then, in order to enhance the exploration and search path, operators of fireflies are combined with Spotted Hyena to assist the swarms in leaving the regionally best solutions. The experimentation has been carried out using the different IoT cloud security datasets such as NSL-KDD-99 , UNSW and CIDCC -001 datasets and contrasted with ten cutting-edge feature extraction techniques, like PSO (particle swarm optimization), BAT, Firefly, ACO(Ant Colony Optimization), Improved PSO, CAT, RAT, Spotted Hyena, SHO and BOC(Bee-Colony Optimization) algorithms. Results demonstrates the proposed hybrid model has achieved the better feature selection mechanism with less convergence time and aids better for intelligent threat detection system with the high performance of detection
Coexistence of antiferrodistortive and ferroelectric distortions at the PbTiO (001) surface
The c(22) reconstruction of (001) PbTiO surfaces is studied by
means of first principles calculations for paraelectric (non-polar) and
ferroelectric ([001] polarized) films. Analysis of the atomic displacements in
the near-surface region shows how the surface modifies the antiferrodistortive
(AFD) instability and its interaction with ferroelectric (FE) distortions. The
effect of the surface is found to be termination dependent. The AFD instability
is suppressed at the TiO termination while it is strongly enhanced,
relative to the bulk, at the PbO termination resulting in a c(2x2) surface
reconstruction which is in excellent agreement with experiments. We find that,
in contrast to bulk PbTiO, in-plane ferroelectricity at the PbO termination
does not suppress the AFD instability. The AFD and the in-plane FE distortions
are instead concurrently enhanced at the PbO termination. This leads to a novel
surface phase with coexisting FE and AFD distortions which is not found in
PbTiO bulk
Analysis of socioeconomic status of young migrant farmers in India using probit regression
Rural-urban migration has been very evident in global population
changes in recent decades, especially in India, where migration
growth rates are among the highest in the world. Many research
articles focused only on the migration of young farmers in India.
This article highlights the migration of young farmers from rural
to urban areas in Bengaluru, their sustainability, and a survey
made on the young farmer’s migration. In this context, the study
was conducted in the Bangalore region on the migration of
Anantapur young farmers, Andhra Pradesh. This study examines
the sustainability of young farmers after migration to urban areas
and, based on this objective, to find out young migrant farmers
are financially well-being or not. For the purpose of analysis, 500
primary data are collected from the young migrant farmers. The
Probit model is employed to assess whether young migrant farmers
were economically stable or not. The study’s findings show
that young migrated farmers to urban areas are more likely to be
unsustainable due to the cost of living and additional costs.
Young migrant farmers do not have enough income so they take
loans from private lenders to meet their needs
A post-Newtonian diagnosis of quasiequilibrium configurations of neutron star-neutron star and neutron star-black hole binaries
We use a post-Newtonian diagnostic tool to examine numerically generated
quasiequilibrium initial data sets for non-spinning double neutron star and
neutron star-black hole binary systems. The PN equations include the effects of
tidal interactions, parametrized by the compactness of the neutron stars and by
suitable values of ``apsidal'' constants, which measure the degree of
distortion of stars subjected to tidal forces. We find that the post-Newtonian
diagnostic agrees well with the double neutron star initial data, typically to
better than half a percent except where tidal distortions are becoming extreme.
We show that the differences could be interpreted as representing small
residual eccentricity in the initial orbits. In comparing the diagnostic with
preliminary numerical data on neutron star-black hole binaries, we find less
agreement.Comment: 17 pages, 6 tables, 8 figure
Prevalence of elongation and calcification patterns of elongated styloid process in south india
Objective: Very few studies have been reported in the literature classifying the elongation and calcification patterns
of styloid process. The present study was done to investigate the prevalence of elongation and calcification patterns
of styloid process in patients attending a dental institution in south India.
Study design: 600 digital panoramic radiographs of patients with dental problems were obtained from the outpatient
department of the Dental institution. The apparent length of the styloid process was measured by a single experienced
oral radiologist, with the help of the measuring tools on the accompanying software. The type of elongation
and calcification patterns of each elongated styloid process was classified as per Langlai's classification with few
modifications. Finally the data was subjected to statistical analysis.
Results: Out of 520 measurable styloid processes (260 panoramic radiographs), 154 styloid processes had length
greater than 3cm. The mean average length of elongated styloid process was 3.67±0.62 cm. No significant association
was obtained between age and length of styloid process. In present study, the type of elongation pattern has no
effect on the calcification pattern. Our results suggested that Type I elongated styloid processes were most likely to
be completely calcified (type D), but statistically not significant.
Conclusion: Type I pattern of elongation was found to be more prevalent in elder age group and was completely
calcified in most of the cases. Interestingly, only three patients (out of 260) showed symptomatic elongation of
styloid process. A relatively high prevalence of type IV elongation pattern (9 /154) was obtained in the present
study, when compared to type III styloid process. Further large scale imaging studies are required to evaluate the
presence of type IV elongation pattern in various population groups
Electronic Excitations and Insulator-Metal Transition in Poly(3-hexylthiophene) Organic Field-Effect Transistors
We carry out a comprehensive theoretical and experimental study of charge
injection in Poly(3-hexylthiophene) (P3HT) to determine the most likely
scenario for metal-insulator transition in this system. We calculate the
optical absorption frequencies corresponding to a polaron and a bipolaron
lattice in P3HT. We also analyze the electronic excitations for three possible
scenarios under which a first-- or a second--order metal--insulator transition
can occur in doped P3HT. These theoretical scenarios are compared with data
from infrared absorption spectroscopy on P3HT thin film field-effect
transistors (FET). Our measurements and theoretical predictions suggest that
charge-induced localized states in P3HT FETs are bipolarons and that the
highest doping level achieved in our experiments approaches that required for a
first-order metal--insulator transition.Comment: 9 pages, 4 figures. Phys. Rev. B, in pres
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