2,510 research outputs found
Proofs for Integrity of Data in Cloud Storage
data is moved to a remotely located cloud server in cloud computing. The cloud stores the data and return back to the owner whenever it is needed. But there is no guarantee that data stored in the cloud is secured and not altered by the cloud or Third Party. In order to overcome the problem of integrity of data, the user must be able to use the assist of a third party. The third party has experience in checking integrity of data, that cloud users does not have, and that is difficult for the owner to check. The data in the cloud should be correct, consistent, accessible and high quality. The aim of this research is to ensure the integrity of data and provides the proof that data is in secured manner and to provide cryptographic key to secure the data in the cloud. The proposed approach has been implemented
Indications of a sub-linear and non-universal Kennicutt-Schmidt relationship
We estimate the parameters of the Kennicutt-Schmidt (KS) relationship,
linking the star formation rate (Sigma_SFR) to the molecular gas surface
density (Sigma_mol), in the STING sample of nearby disk galaxies using a
hierarchical Bayesian method. This method rigorously treats measurement
uncertainties, and provides accurate parameter estimates for both individual
galaxies and the entire population. Assuming standard conversion factors to
estimate Sigma_SFR and Sigma_mol from the observations, we find that the KS
parameters vary between galaxies, indicating that no universal relationship
holds for all galaxies. The KS slope of the whole population is 0.76, with the
2sigma range extending from 0.58 to 0.94. These results imply that the
molecular gas depletion time is not constant, but varies from galaxy to galaxy,
and increases with the molecular gas surface density. Therefore, other galactic
properties besides just Sigma_mol affect Sigma_SFR, such as the gas fraction or
stellar mass. The non-universality of the KS relationship indicates that a
comprehensive theory of star formation must take into account additional
physical processes that may vary from galaxy to galaxy.Comment: 7 pages, 2 figures, 1 table. Updated to match MNRAS accepted versio
Primary intraosseous mucoepidermoid carcinoma of maxilla- case report
Primary intraosseous mucoepidermoid carcinoma (PIOC) of the jaw bones is an extremely rare malignant salivary gland tumour constituting 2-4.3% of all the reported mucoepidermoid carcinomas (MEC). It is commonly seen in the posterior part of the mandible and rare in maxilla. The aetiopathogenesis of the PIOC is not completely understood. We hereby, report a case of PIOC of the maxilla in an 18 year old male patient. An incisional biopsy was performed, and the histopathological findings confirmed intermediate-grade mucoepidermoid carcinoma. Maxillary MEC have a worse prognosis than mandibular cases and it should be followed-up for a longer period due to the possibility of late recurrence or regional metastasis
Timescale for equilibration of N/Z gradients in dinuclear systems
Equilibration of N/Z in binary breakup of an excited and transiently deformed
projectile-like fragment (PLF*), produced in peripheral collisions of 64Zn +
27Al, 64Zn, 209Bi at E/A = 45 MeV, is examined. The composition of emitted
light fragments (3<=Z<=6) changes with the decay angle of the PLF*. The most
neutron-rich fragments observed are associated with a small rotation angle. A
clear target dependence is observed with the largest initial N/Z correlated
with the heavy, neutron-rich target. Using the rotation angle as a clock, we
deduce that N/Z equilibration persists for times as long as 3-4 zs (1zs = 1 x
10^-21 s = 300 fm/c). The rate of N/Z equilibration is found to depend on the
initial neutron gradient within the PLF*.Comment: 6 pages, 4 figure
Some aspects of heavy ion fusion-fission dynamics
Study of heavy ion induced fusion-fission reactions at near and below barrier energies has attracted a great deal of attention in recent years, due to the observations of anomalous features in the fragment angular distributions for many target-projectile systems. Additionally there are also measurements of the fragment spin distributions and time-scales of the fusion-fission reactions, which have provided important information on the dynamics of these processes. In the present paper, the emphasis would be to highlight some of the recent experimental findings and their implications on the dynamics of the fusion-fission reactions in heavy ion collisions at near and above barrier energies
An approach to obtain specific polyclonal antisera to Xanthomonas campestris pv. cyamopsidis and its potential application in indexing of infected seeds of guar
Clusterbean seed health testing is warranted since the pathogen (Xanthomonas campestris pv. cyamopsidis (Xccy)) is seed-borne and seed-transmitted. A polyclonal antibody was developed in rabbit via subcutaneous and intramuscular injections and characterized for sensitivity, specificity and its applicability to ELISA which: (i) was sensitive in detecting as few as 102 cells ml−1 at a titre of 1:4000; (ii) was specific, since it reacted only with Xccy and not with other xanthomonads; (iii) reacted both with Xccy cells and culture filtrate, indicating that the antigenic determinant is a secretory component; (iv) was applicable and reliable in seed health testing since it reacted only with infected seeds and plant materials and not with healthy seeds and (v) a purified fraction of antibody was virulent-specific since heat-denatured and avirulent isolates were not detected. The ELISA thus developed is highly reproducible and therefore suitable for the evaluation of the potential disease status of seeds and plant health, which is appropriate for routine seed health testing
Aetiopathology of ulcers of oral cavity and oropharynx: a cross sectional study
Background: Oral ulcers are common diseases for which patient seeks medical advice. Till date the clinical profile to diagnose the oral ulcers, management and risk of malignancy is not well established. Hence, the study has been taken up to investigate the aetiopathology of ulcers of oral cavity and oropharynx.Methods: 60 cases of ulcers of oral cavity and oropharynx were included in the study. The aetiopathology of ulcers of oral cavity and oropharynx were investigated on the basis of age, sex, duration, etiological factors, symptom Index, socioeconomic status and anatomical distribution. Values are expressed as percentages. Results: The highest incidence was found in low socioeconomic status. The lesions studied in this study were 50% of Non Specific ulcers [Short term (3 wks) 10-33%], 15% of Aphthous ulcers, 8.3% of Traumatic Ulcers, 6.5% of Malignant ulcers, 6.5% of Dental ulcers, 3.2% of HIV infection & AIDS, 3.2% of ulcer due to T.B and 6.5% of ulcers. The majority of the cases were between the age 21-30 years constituting 35% followed by 11-12 years constituting 26.6%.d 62% of the short term ulcers, Female 38%.Conclusions: Low socioeconomic status, lack of education, bad oral hygiene, bad habits cultivated in early childhood is predisposing factors. Hence early diagnosis and prompt treatment is advised in all cases of ulcers.
A study on the clinical profile of ulcers and membranous lesions of oral cavity and oropharynx
Background: An ulcer is a discontinuity of an epithelial surface. Many a times, patients with oral ulcers are treated sympathetically without even coming to a definitive conclusion of their problem. Oral ulcers are common diseases for which patient seeks medical advice. Till date the clinical profile to diagnose the oral ulcers, membranous lesions of oral cavity and oropharynx is not well established. Hence, the study has been taken up to investigate the aetiopathology of ulcers of oral cavity and oropharynx. Methods: 60 cases of ulcers of oral cavity and oropharynx were included in the study. The aetiopathology of ulcers of oral cavity and oropharynx were investigated on the basis of age, sex, duration, etiological factors, symptom Index, socioeconomic status and anatomical distribution. Values are expressed as percentages. Results: The highest incidence was found to be in low socioeconomic group, where there is lack of education, improper food habits, cultivation of bad habits in early childhood and negligence of the disease are the predisposing factors in most of the malignancies. The highest incidence was found in low socioeconomic status. The lesions studied in this study were 50% of non-specific ulcers (Short term (3 wks) 10-33%), 15% of Aphthous ulcers, 8.3% of Traumatic Ulcers, 6.5% of Malignant ulcers, 6.5% of Dental ulcers, 3.2% of HIV infection & AIDS, 3.2% of ulcer due to T.B. and 6.5% of ulcers. The majority of the cases were between the age 21-30 yrs constituting 35% followed by 11-12 years constituting 26.6%.d 62% of the short term ulcers, Female 38%. Conclusions: Low socioeconomic status, lack of education, bad oral hygiene, bad habits cultivated in early childhood is predisposing factors. Hence early diagnosis and prompt treatment is advised in all cases of ulcers.
Analysis of fragment yield ratios in the nuclear phase transition
The critical phenomena of the liquid-gas phase transition has been
investigated in the reactions 78,86Kr+58,64Ni at beam energy of 35 MeV/nucleon
using the Landau free energy approach with isospin asymmetry as an order
parameter. Fits to the free energy of fragments showed three minima suggesting
the system to be in the regime of a first order phase transition. The relation
m =-{\partial}F/{\partial}H, which defines the order parameter and its
conjugate field H, has been experimentally verified from the linear dependence
of the mirror nuclei yield ratio data, on the isospin asymmetry of the source.
The slope parameter, which is a measure of the distance from a critical
temperature, showed a systematic decrease with increasing excitation energy of
the source. Within the framework of the Landau free energy approach, isoscaling
provided similar results as obtained from the analysis of mirror nuclei yield
ratio data. We show that the external field is primarily related to the minimum
of the free energy, which implies a modification of the source concentration
\Delta used in isospin studies
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