1,622 research outputs found
Mobile Application Security Platforms Survey
Nowadays Smartphone and other mobile devices have become incredibly important in every aspect of our life. Because they have practically offered same capabilities as desktop workstations as well as come to be powerful in terms of CPU (Central processing Unit), Storage and installing numerous applications. Therefore, Security is considered as an important factor in wireless communication technologies, particularly in a wireless ad-hoc network and mobile operating systems. Moreover, based on increasing the range of mobile application within variety of platforms, security is regarded as on the most valuable and considerable debate in terms of issues, trustees, reliabilities and accuracy. This paper aims to introduce a consolidated report of thriving security on mobile application platforms and providing knowledge of vital threats to the users and enterprises. Furthermore, in this paper, various techniques as well as methods for security measurements, analysis and prioritization within the peak of mobile platforms will be presented. Additionally, increases understanding and awareness of security on mobile application platforms to avoid detection, forensics and countermeasures used by the operating systems. Finally, this study also discusses security extensions for popular mobile platforms and analysis for a survey within a recent research in the area of mobile platform security
rp-Process weak-interaction mediated rates of waiting-point nuclei
Electron capture and positron decay rates are calculated for
neutron-deficient Kr and Sr waiting point nuclei in stellar matter. The
calculation is performed within the framework of pn-QRPA model for rp-process
conditions. Fine tuning of particle-particle, particle-hole interaction
parameters and a proper choice of the deformation parameter resulted in an
accurate reproduction of the measured half-lives. The same model parameters
were used to calculate stellar rates. Inclusion of measured Gamow-Teller
strength distributions finally led to a reliable calculation of weak rates that
reproduced the measured half-lives well under limiting conditions. For the
rp-process conditions, electron capture and positron decay rates on Kr
and Sr are of comparable magnitude whereas electron capture rates on
Sr and Kr are 1--2 orders of magnitude bigger than the
corresponding positron decay rates. The pn-QRPA calculated electron capture
rates on Kr are bigger than previously calculated. The present
calculation strongly suggests that, under rp-process conditions, electron
capture rates form an integral part of weak-interaction mediated rates and
should not be neglected in nuclear reaction network calculations as done
previously.Comment: 13 pages, 4 figures, 4 tables; Astrophysics and Space Science (2012
Computational modelling of three-dimensional bedform evolution
River morphodynamics and sediment transportRiver morphology and morphodynamic
Effect of delayed icing on quality changes and shelf-life of some freshwater fish from Bangladesh
The quality and shelf-life of three freshwater fish species of Bangladesh, catla (Catla
catla), magur (Clarias batrachus) and tilapia (Oreochromis niloticus) stored at room
temperature and ice were evaluated. Live fishes were killed by cranial spiking and stored
at room temperature (27-30 °C), ice stored immediately after death, 5 hr after death and
10 hr after death. The shelf-life and quality of the fishes were evaluated by organoleptic
method, rigor-mortis studies and bacteriological assessment.
Fishes kept at room temperature became organoleptically unacceptable within 16-20
hr duration. Ice stored fishes showed considerable differences in their shelf-life when
icing was delayed for different duration. Shelf-life of catla ice stored immediately after
death was 20 days but shelf-life reduced to 12 days when icing delayed for 10 hr after
death. Similar trend was observed for two other fish species magur and tilapia. Rigor-index
of the fishes stored under different conditions also considerably varied among the
three fish species, particularly effect of delayed icing was very much evident.
Bacteriological study showed patterns of Aerobic Plate Count (APC) at the end of shelflife
study when fishes became organoleptically unacceptable were more or less similar for
all the three fish species stored under different conditions. No definite pattern was
observed in the generic distribution of bacteria in different fish species under different
storage conditions. Micrococcus, Coryneforms, Pseudomonas and Achromobacter were the
dominant groups of bacteria isolated from the fishes spoiled at room temperature and ice
stored condition
ASSESSMENT OF TEMPORAL FLOW VARIABILITY OF THE KABUL RIVER
Water resources estimation under changing flow regimes is required for planning and smooth distribution of water to provinces. Since the hydrological parameters are changing significantly due to climate change, the changes in the pattern of flow regimes are definite. The objective of present study was to assess the spatial and temporal hydro variability of Indus basin. The data of Kabul river at Nowshera before its confluence with Indus river were collected from Surface water Hydrology Project (SWHP), WAPDA. The seasons were divided as three and six month keeping in view the hydrological cycle. Trends and variation were investigated by applying the Mann-Kendall test and Sen’s method. The presence of trends tested at different significant level, 99.9%, 95% and 90%. The overall analysis indicates that there is more flow variation on seasonal basis as compared to the annual basis. The Kabul river showed decreasing trend in the maximum mean annual discharge, whereas the minimum mean annual discharge showed increasing trend. It was concluded that Kabul river showed decreasing trend in annual mean and maximum discharge, whereas annual minimum discharge showed increasing trend. It was also noticed that Kabul river mean minimum discharge time series decreased during 1961-1985, whereas it increased during 1986-2010. It was also found that annual mean and maximum discharge decreasing rate was greater during 1986-2010. It was further concluded that each decade experienced one or two years of both dry and wet periods and that 2000-2004 was the driest period in the history of Kabul River
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