Sajjad shah - Academia.edu (original) (raw)

Papers by Sajjad shah

International Journal of Computer Applications, 2017

2018 9th IEEE Annual Ubiquitous Computing, Electronics & Mobile Communication Conference (UEMCON), 2018

Different methodologies had been used in recent years to get out of these security issues using d... more Different methodologies had been used in recent years to get out of these security issues using distributed database and distributed architecture. Encryption and decryption are the main techniques while there way of implementation is different. But one thing is being ignored that battery powered consumption vary from one way of implementation to other. In this work, we calculate the energy Consumption and other differences between different encryption decryption methodologies like DES and AES. AES-256 becomes implementable when we use block cipher properly. Block Cipher shows no issue when using AES-128 but it do when we use it improperly in AES-256 .The result shows that DES used 56 bit key size which can give 7.2 x 1016 whereas AES used 128 bit key size which can give 3.4 x 1039 different possible combination which show it is more secure . AES can also use 256 bit which can 1.1 x 1077 combination which is not only more secure but also encryption time is dramatically decrease to 30-40 percent which will directly increase battery consumption time. After using this AES-256 will becomes implementable and all of its advantages which are mentioned above could be fully useable.

Wireless Sensor Network has large domain of application with different desires. The protocol and ... more Wireless Sensor Network has large domain of application with different desires. The protocol and network infrastructure change as per application requirements for the purpose to gain the best network resource allocation and performance so network operation must be adapt based on application requirements. In this article we propose service oriented middleware framework for wireless sensor networks (WSNs) with security requirements. XML, SOAP and WSDL are used for network communication. The architecture provides an interface between user applications and the network which offer an automatic choice of the network configuration and data communication approaches. KEYWORD: middleware, sensor networks, security, web services.

Lithosphere, 2021

Tight sandstone reservoirs are widely distributed worldwide. The Upper Triassic Chang 6 member of... more Tight sandstone reservoirs are widely distributed worldwide. The Upper Triassic Chang 6 member of the Yanchang Formation is characterized by low permeability and porosity. The facies model offers a unique approach for understanding the characteristics of various environments also heterogeneity, scale, and control of physical processes. The role of subsurface facies features and petrophysical properties was unclear. Notable insufficient research has been conducted based on facies and petrophysical modeling and that demands to refine the role of reservoir properties. To tackle this problem, a reservoir model is to be estimated using various combinations of property modeling algorithms for discrete (facies) and continuous (petrophysical) properties. Chang 6 member consists of three main facies, i.e., channel, lobe main body, and lobe margin facies. The current research is aimed at comparing the applicability and competitiveness of various facies and petrophysical modeling methods. Furt...

AIP Conference Proceedings, 2014

Different from the molecular gas, clustering is a most commonly observed feature of the granular ... more Different from the molecular gas, clustering is a most commonly observed feature of the granular gas. A review is given of our previous work on the clustering, especially the oscillatory clustering for shaken fluidized granular matter in connected compartments, as examples for pattern formation and bifurcations in far from equilibrium systems. Flux model is presented and discussed for mono-disperse and bi-disperse granular systems. Comparison of the flux model with simulation results is given. They show reasonably well agreements. Besides the homogeneous (HOM), segregation (SEG), and oscillatory (OSC) states, two new stationary states (d-OSC and s-HOM) in the bi-disperse granular system are predicted by our simulation. In our recent work these two new states are observed experimentally, and their flow diagrams are obtained based on the flux model. The transition from degenerate oscillation state to oscillation state demonstrates a homoclinic gluing bifurcation.

2013 IEEE Aerospace Conference, 2013

ABSTRACT Wireless sensors networks have several applications of their own. These applications can... more ABSTRACT Wireless sensors networks have several applications of their own. These applications can further enhanced by integrating a local wireless sensor network to internet, which can be used in real time applications where the results of sensors are stored on the cloud. We propose an architecture that integrates a wireless sensor network to the internet using cloud technology. The resultant system is proved to be reliable, available and extensible. In this paper a new framework is proposed for WSN integration with Cloud computing model, existing WSN will be connected to the proposed framework. Three deployment layer are used to serve user request (IaaS, PaaS, SaaS) either from the library which is made from data collected from data centric DC by WSN periodically. The integration controller unit of the proposed framework integrates the sensor network and cloud computing technology which offers reliability, availability and extensibility.

Chinese Physics Letters, 2012

A 3-D molecular dynamics simulation of a bi-disperse vibro-fluidized granular gas in a cyclic thr... more A 3-D molecular dynamics simulation of a bi-disperse vibro-fluidized granular gas in a cyclic three-compartment cell is performed. A cluster of particles is randomly found in one of the compartments. Lohse's flux model is modified to incorporate inelastic particle-boundary collisions. This model predicts that periodically there is clustering in each compartment. It is then found that if the model is further modified to incorporate Gaussian white noise, it correctly predicts the non-sequential clustering behavior confirming that there is no chaotic behavior.

Applied Surface Science, 2011

Dandelion-like gallium nitride (GaN) microstructures were successfully synthesized via Ni catalys... more Dandelion-like gallium nitride (GaN) microstructures were successfully synthesized via Ni catalyst assisted chemical vapor deposition method at 1200 • C under NH 3 atmosphere by pre-treating precursors with aqueous ammonia. The as-synthesized product was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). X-ray diffraction analysis revealed that as-synthesized dandelion-like GaN was pure and has hexagonal wurtzite structure. SEM results showed that the size of the dandelion-like GaN structure was in the range of 30-60 m. Dandelion-like GaN microstructures exhibited reasonable field emission properties with the turn-on field of 9.65 V m −1 (0.01 mA cm −2) and threshold field of 11.35 V m −1 (1 mA cm −2) which is sufficient for applications of electron emission devices, field emission displays and vacuum micro electronic devices. Optical properties were studied at room temperature by using fluorescence spectrophotometer. Photoluminescence (PL) measurements of dandelion-like GaN showed a strong near-band-edge emission at 370.2 nm (3.35 eV) with blue band emission at 450.4 nm (2.75 eV) and 465.2 nm (2.66 eV) but with out yellow band emission. The room-temperature photoluminescence properties showed that it has also potential application in light-emitting devices. The tentative growth mechanism for the growth of dandelion-like GaN was also described.

International Journal of Computer Applications, 2017

2018 9th IEEE Annual Ubiquitous Computing, Electronics & Mobile Communication Conference (UEMCON), 2018

Different methodologies had been used in recent years to get out of these security issues using d... more Different methodologies had been used in recent years to get out of these security issues using distributed database and distributed architecture. Encryption and decryption are the main techniques while there way of implementation is different. But one thing is being ignored that battery powered consumption vary from one way of implementation to other. In this work, we calculate the energy Consumption and other differences between different encryption decryption methodologies like DES and AES. AES-256 becomes implementable when we use block cipher properly. Block Cipher shows no issue when using AES-128 but it do when we use it improperly in AES-256 .The result shows that DES used 56 bit key size which can give 7.2 x 1016 whereas AES used 128 bit key size which can give 3.4 x 1039 different possible combination which show it is more secure . AES can also use 256 bit which can 1.1 x 1077 combination which is not only more secure but also encryption time is dramatically decrease to 30-40 percent which will directly increase battery consumption time. After using this AES-256 will becomes implementable and all of its advantages which are mentioned above could be fully useable.

Wireless Sensor Network has large domain of application with different desires. The protocol and ... more Wireless Sensor Network has large domain of application with different desires. The protocol and network infrastructure change as per application requirements for the purpose to gain the best network resource allocation and performance so network operation must be adapt based on application requirements. In this article we propose service oriented middleware framework for wireless sensor networks (WSNs) with security requirements. XML, SOAP and WSDL are used for network communication. The architecture provides an interface between user applications and the network which offer an automatic choice of the network configuration and data communication approaches. KEYWORD: middleware, sensor networks, security, web services.

Lithosphere, 2021

Tight sandstone reservoirs are widely distributed worldwide. The Upper Triassic Chang 6 member of... more Tight sandstone reservoirs are widely distributed worldwide. The Upper Triassic Chang 6 member of the Yanchang Formation is characterized by low permeability and porosity. The facies model offers a unique approach for understanding the characteristics of various environments also heterogeneity, scale, and control of physical processes. The role of subsurface facies features and petrophysical properties was unclear. Notable insufficient research has been conducted based on facies and petrophysical modeling and that demands to refine the role of reservoir properties. To tackle this problem, a reservoir model is to be estimated using various combinations of property modeling algorithms for discrete (facies) and continuous (petrophysical) properties. Chang 6 member consists of three main facies, i.e., channel, lobe main body, and lobe margin facies. The current research is aimed at comparing the applicability and competitiveness of various facies and petrophysical modeling methods. Furt...

AIP Conference Proceedings, 2014

Different from the molecular gas, clustering is a most commonly observed feature of the granular ... more Different from the molecular gas, clustering is a most commonly observed feature of the granular gas. A review is given of our previous work on the clustering, especially the oscillatory clustering for shaken fluidized granular matter in connected compartments, as examples for pattern formation and bifurcations in far from equilibrium systems. Flux model is presented and discussed for mono-disperse and bi-disperse granular systems. Comparison of the flux model with simulation results is given. They show reasonably well agreements. Besides the homogeneous (HOM), segregation (SEG), and oscillatory (OSC) states, two new stationary states (d-OSC and s-HOM) in the bi-disperse granular system are predicted by our simulation. In our recent work these two new states are observed experimentally, and their flow diagrams are obtained based on the flux model. The transition from degenerate oscillation state to oscillation state demonstrates a homoclinic gluing bifurcation.

2013 IEEE Aerospace Conference, 2013

ABSTRACT Wireless sensors networks have several applications of their own. These applications can... more ABSTRACT Wireless sensors networks have several applications of their own. These applications can further enhanced by integrating a local wireless sensor network to internet, which can be used in real time applications where the results of sensors are stored on the cloud. We propose an architecture that integrates a wireless sensor network to the internet using cloud technology. The resultant system is proved to be reliable, available and extensible. In this paper a new framework is proposed for WSN integration with Cloud computing model, existing WSN will be connected to the proposed framework. Three deployment layer are used to serve user request (IaaS, PaaS, SaaS) either from the library which is made from data collected from data centric DC by WSN periodically. The integration controller unit of the proposed framework integrates the sensor network and cloud computing technology which offers reliability, availability and extensibility.

Chinese Physics Letters, 2012

A 3-D molecular dynamics simulation of a bi-disperse vibro-fluidized granular gas in a cyclic thr... more A 3-D molecular dynamics simulation of a bi-disperse vibro-fluidized granular gas in a cyclic three-compartment cell is performed. A cluster of particles is randomly found in one of the compartments. Lohse's flux model is modified to incorporate inelastic particle-boundary collisions. This model predicts that periodically there is clustering in each compartment. It is then found that if the model is further modified to incorporate Gaussian white noise, it correctly predicts the non-sequential clustering behavior confirming that there is no chaotic behavior.

Applied Surface Science, 2011

Dandelion-like gallium nitride (GaN) microstructures were successfully synthesized via Ni catalys... more Dandelion-like gallium nitride (GaN) microstructures were successfully synthesized via Ni catalyst assisted chemical vapor deposition method at 1200 • C under NH 3 atmosphere by pre-treating precursors with aqueous ammonia. The as-synthesized product was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). X-ray diffraction analysis revealed that as-synthesized dandelion-like GaN was pure and has hexagonal wurtzite structure. SEM results showed that the size of the dandelion-like GaN structure was in the range of 30-60 m. Dandelion-like GaN microstructures exhibited reasonable field emission properties with the turn-on field of 9.65 V m −1 (0.01 mA cm −2) and threshold field of 11.35 V m −1 (1 mA cm −2) which is sufficient for applications of electron emission devices, field emission displays and vacuum micro electronic devices. Optical properties were studied at room temperature by using fluorescence spectrophotometer. Photoluminescence (PL) measurements of dandelion-like GaN showed a strong near-band-edge emission at 370.2 nm (3.35 eV) with blue band emission at 450.4 nm (2.75 eV) and 465.2 nm (2.66 eV) but with out yellow band emission. The room-temperature photoluminescence properties showed that it has also potential application in light-emitting devices. The tentative growth mechanism for the growth of dandelion-like GaN was also described.