Shivani Malhotra

Performance Analysis of Color Space for Optimum Skin Color Detection

In the development of Human computer interface applications information related to skin color is extensively utilized. Reason being skin is the biggest part of human being. Human skin color shows resemblance with non-skin colored material like wall paint, wood etc. So an efficient human computer interface (HCI) system is required to be designed which can distinguish between them. The default color space obtained from imaging device is RGB and processing with this color space takes more time as comparison to other color spaces, hence color space transformation is required. Thus in this paper system performance is evaluated on the basis of processing time and computational complexity. It is verified that less complex structure of application reduces the processing time too. Using two different color space schemes computational time for processing a fixed number of frames of video signal in a constant environment are evaluated and on the basis of that a better color scheme method is proposed.

Analysing behaviour of RRC filter over different modulation formats over AWGN Channel

With the evolution of new communication technologies, requirement of data rate is increasing for service providers. So it exists several digital modulation techniques to enhance bandwidth efficiency. Use of pulse shaping can enhance system performance drastically. In this paper we provide an analysis of the root raised cosine (RRC) filter by using various M-ary QAM (M = 3D 32,64 & 128) modulation formats over an AWGN fading channel. Performance has been analysed using eye diagram and constellation diagram taking BER as measure of performance. Results presented prove that increasing the value of the modulations order added to a RRC pulse shaping makes discrease BER with the increase in data rate.

A review on significance of design parameters of microstrip patch antennas

An enormous development in the study of micro-strip patch antennas has been observed in the recent years. This review paper presents the work done on micro-strip patch antennas in the last decade. Different antenna structures have been proposed with the focus of improving antenna parameters like gain, directivity, and bandwidth and return loss. Work has been done to make the antennas more compact and low profile. Use of ferrites in designing a patch antenna and its impact on antenna parameters is also discussed.

Structural, magnetic and dielectric properties of pure and nickel-doped barium nanohexaferrites synthesized using chemical co-precipitation technique

Abstract Nickel-doped barium nanohexaferrites with the chemical formula BaNixFe(12-x)O19 are prepared using the chemical co-precipitation technique. The calcination of the samples is done at 800°C for 4 h. In order to carry out the structural analysis that includes the crystallographic and the morphological investigations, X-ray diffraction and TEM are carried out to govern the phase, structure and the size of the crystal. By the use of Debye–Scherrer equation, the size of the crystallite is calculated to be in the range of 38–100 nm. TEM results reveal the magnetoplumbite structure of the hexaferrites. The M–H curve obtained using the Vibrating Sample Magnetometer computes the magnetic parameters like saturation magnetization, coercivity, remanence and verifies the behaviour of hexaferrites as hard magnetic materials. Further, the effect of variation in calcination temperature is also investigated on the values of magnetic parameters of hexaferrites. In order to carry out the investigations on the electrical properties of hexaferrites, the two-probe method and parallel plate capacitor set-up are used. The values of relative permittivity, dielectric loss and loss tangent are computed as a function of frequency. The values of DC electrical resistance for pure and nickel-doped barium nanohexaferrites are evaluated from the slope of I–V graphs.

GTL based wireless sensor specific energy efficient ALU design on 65nm FPGA

This paper consists of design based on sustainable energy efficient ALU32Bit and for that reason we have used four different members of GTL IO standards on 65nm technology. In this paper, we have considered two main parameters for analysis that are frequencies in GHz and AIRFLOW (LFM 250). We have considered Medium as a default profile for heat sink and environment is constant. Xilinx is used for the simulation of logic with Verilog as hardware description language. We have done our analysis for different frequency values for WLANs based on IEEE 802.11 standards. When we scale down from 60GHz to 0.9 GHz we observed maximum IO power reduction and leakage power reduction in GTL, constant clock power and logic power reduction in all the considered IO standards and maximum Signal power reduction in GTLP_DCI and GTL_DCI.