Saturday, 23 March 2013


Passwords are so difficult to manage, and nowadays everything needs a  passwords. you dozens of passwords,they all have to be dissimilar, you have to keep changing them frequently , and all have to keep changing them frequently ,and you cannot even write them down ! if this problem occurs with you , then myIDkey is sure to catch your attention.
     myIDkey is a voice activated , fingerprint-authenticated USB drive that stores passwords,e-mails , IDs ,numbers and such personal information and displays it on it's built-in-screen. it is handy and secure tool, which will be launched this year and is likely to cost around US$ 120.


it includes voice search , secure 16 GB storage, a cloud-based password management platform, auto deletion of information on multiple wrong accesses , atmel microcontroller with high-performance ARM cortex-M3 322-bit RISC core operating at up to 96 MHz.

Saturday, 9 March 2013


There is a great news for the dumb and hearing-impaired people, with scientist testing a new mobile device which , they claim can transmit american sign language (ASL) over cellular networks. developed by the engineers That the Washington USA. 
mobile (ASL) uses motion detection technology to identify sign language and transmit video images over cell networks in the US. the tool can be integrated into any high end mobile phone with a video camera on the same side as the screen.according to the resources further research is currently done to optimise compressed video signal for sign language , with a view to increasing the quality of the images around the face and hands to reduce the data rate to 30 kilobytes per second. to minimize the amount of battery power , the mobile ASL phones use motion sensors to determine whether the sign language is being used.

Thursday, 7 March 2013


The elastic and flexible nature of the cloud has been extensively used by by the open source software framework that supports data-intensive distributed applications. open source software (OSS) is computer software with its source code made available and licensed with an open source in which the copyright holder provides the rights to study , change and distribute the software for free  to anyone and for any purpose.

for creating ,managing, and deploying infrastructure as a service(Iaas) clouds in service-provider environment or enterprise environment . its code base is java , with self-service user portal .it was originally developed by, which released most of cloudstack under the GNU general public licence ,version 3(GPLv3). cloudstack 3.0.2 is the latest version . it supports the end-to-end functionality required for infrastructure as a service , which includes compute,storage, network and user management.


software to build public and private clouds. it has a modular architecture, which includes components such as compute,object storage, image service, identity, dashboard, networking and block-storage. originally started by Rackspace & NASA in 2010. currently intel,cisco, dell,hp, AMD, Red hat & IBM have joined the project.
  • Eucalyptus
Eucalyptus is an open source + commercial private IaaS service provider. Eucalyptus is the short form for ' elastic computing architecture for linking your programs to useful systems'.
it has compatibility with amazon web service API. it ensures the secure communication between internal process via SOAP & WS- security. linux and windows virtual machines can be run with Eucalyptus .

  • OpenNebula
it manages the virtual infrastructure to build private, public and hybrid infrastructure as service clouds. it gives storage, network, virtualisation , monitoring and security. it was is a research project in 2005 by Ignacio M llorente & ruben s montero , and was released under the apache licence.
it provides AWS EC2 & EBS APIs and the self service portal for cloud consumers. it provides a powerful CLI that resembles typical UNIX commands .  it very easy to implement third-party tool integration 

Apache hadoop is a software framework inspired by google's mapreduce and google file system(GFS) papers. this programming model can rapidly process huge amounts og data in parallel , on large clusters of compute finda application in social networking sources as it can manage the comprehensive and undiscovered relationships .

Saturday, 2 March 2013


Linear Algebra : Matrix Algebra,
Systems of linear equations,
Eigen values and eigen vectors.
Calculus: Mean value theorems,
Theorems of integral calculus,
Evaluation of definite and improper
integrals, Partial Derivatives,
Maxima and minima, Multiple
integrals, Fourier series. Vector
identities, Directional derivatives,
Line, Surface and Volume integrals,
Stokes, Gauss and Green?s
Differential equations: First order
equation (linear and nonlinear),
Higher order linear differential
equations with constant
coefficients, Method of variation of
parameters, Cauchy?s and Euler?s
equations, Initial and boundary
value problems, Partial Differential
Equations and variable separable
Complex variables: Analytic
functions, Cauchy?s integral
theorem and integral formula,
Taylor?s and Laurent? series,
Residue theorem, solution
Probability and Statistics:
Sampling theorems, Conditional
probability, Mean, median, mode
and standard deviation, Random
variables, Discrete and continuous
distributions, Poisson,Normal and
Binomial distribution, Correlation
and regression analysis.
Numerical Methods: Solutions of
non-linear algebraic equations,
single and multi-step methods for
differential equations.
Transform Theory: Fourier
transform,Laplace transform, Z-
Networks: Network graphs:
matrices associated with graphs;
incidence, fundamental cut set and
fundamental circuit matrices.
Solution methods: nodal and mesh
analysis. Network theorems:
superposition, Thevenin and
Norton?s maximum power transfer,
Wye-Delta transformation. Steady
state sinusoidal analysis using
phasors. Linear constant coefficient
differential equations; time domain
analysis of simple RLC circuits,
Solution of network equations
usingLaplace transform: frequency
domain analysis of RLC circuits. 2-
port network parameters: driving
point and transfer functions. State
equations for networks.
Electronic Devices: Energy bands
in silicon, intrinsic and extrinsic
silicon. Carrier transport in silicon:
diffusion current, drift current,
mobility, and resistivity. Generation
and recombination of carriers.p-n
junction diode, Zener diode, tunnel
diode, BJT, JFET, MOS capacitor,
MOSFET, LED, p-I-n and avalanche
photo diode, Basics of LASERs.
Device technology: integrated
circuits fabrication process,
oxidation, diffusion, ion
implantation, photolithography, n-
tub, p-tub and twin-tub CMOS
Analog Circuits: Small Signal
Equivalent circuits of diodes, BJTs,
MOSFETs and analog CMOS. Simple
diode circuits, clipping, clamping,
rectifier.Biasing and bias stability
of transistor and FET amplifiers.
Amplifiers: single-and multi-stage,
differential and operational,
feedback, and power. Frequency
response of amplifiers.Simple op-
amp circuits. Filters. Sinusoidal
oscillators; criterion for oscillation;
single-transistor and op-amp
configurations.Function generators
and wave-shaping circuits, 555
Timers. Power supplies.
Digital circuits: Boolean algebra,
minimization of Boolean functions;
logic gates; digital IC families (DTL,
Combinatorial circuits: arithmetic
circuits, code converters,
multiplexers, decoders, PROMs and
PLAs. Sequential circuits: latches
and flip-flops, counters and shift-
registers. Sample and hold circuits,
ADCs, DACs. Semiconductor
memories. Microprocessor(8085):
architecture, programming,
memory and I/O interfacing.
Signals and Systems: Definitions
and properties ofLaplace
transform, continuous-time and
discrete-time Fourier series,
continuous-time and discrete-time
Fourier Transform, DFT and FFT, z-
transform. Sampling theorem.
Linear Time-Invariant (LTI)
Systems: definitions and properties;
causality, stability, impulse
response, convolution, poles and
zeros, parallel and cascade
structure, frequency response,
group delay, phase delay. Signal
transmission through LTI systems.
Control Systems: Basic control
system components; block
diagrammatic description,
reduction of block diagrams. Open
loop and closed loop (feedback)
systems and stability analysis of
these systems. Signal flow graphs
and their use in determining
transfer functions of systems;
transient and steady state analysis
of LTI control systems and
frequency response. Tools and
techniques for LTI control system
analysis: root loci, Routh-Hurwitz
criterion, Bode and Nyquist plots.
Control system compensators:
elements of lead and lag
compensation, elements of
(PID) control. State variable
representation and solution of state
equation of LTI control systems.
Communications: Random signals
and noise: probability, random
variables, probability density
function, autocorrelation, power
spectral density. Analog
communication systems: amplitude
and angle modulation and
demodulation systems, spectral
analysis of these operations,
superheterodyne receivers;
elements of hardware, realizations
of analog communication systems;
signal-to-noise ratio (SNR)
calculations for amplitude
modulation (AM) and frequency
modulation (FM) for low noise
conditions. Fundamentals of
information theory and channel
capacity theorem. Digital
communication systems: pulse
code modulation (PCM), differential
pulse code modulation (DPCM),
digital modulation schemes:
amplitude, phase and frequency
shift keying schemes (ASK, PSK,
FSK), matched filter receivers,
bandwidth consideration and
probability of error calculations for
these schemes. Basics of TDMA,
FDMA and CDMA and GSM.
Electromagnetics: Elements of
vector calculus: divergence and
curl; Gauss? and Stokes? theorems,
Maxwell?s equations: differential
and integral forms. Wave equation,
Poynting vector. Plane waves:
propagation through various
media; reflection and refraction;
phase and group velocity; skin
depth. Transmission lines:
characteristic impedance;
impedance transformation; Smith
chart; impedance matching; S
parameters, pulse excitation.
Waveguides: modes in rectangular
waveguides; boundary conditions;
cut-off frequencies; dispersion
relations. Basics of propagation in
dielectric waveguide and optical
fibers. Basics of Antennas: Dipole
antennas; radiation pattern;
antenna gain.