International Research Journal on Advanced Science Hub

A recent data suggest that currently there are more than 485 million wearable sensors or gadgets users in the world and expected to increase in the near future. The communication technologies used in these gadgets are either Wi-Fi or Blue-Tooth. These wireless technologies have inherent limitations to be used in Health Monitoring. Also, these technology gadgets are not being considered and accepted by medical practitioners for e-health monitoring. To address this issue, in 2012 IEEE 802.15.6 standard has been introduced to develop future of e- health monitoring which paves its way to Wireless Body Area Networks (WBAN) developments. India, being populated country, WBAN can be extremely useful technology to reduce burden on health care system. WBAN research has gained importance in India, where most of the research is focussed on sensor development and monitoring. The network level studies focussing on interference phenomenon are rare to find. In this paper, a focus is on developing an interference scenario in simulation environment. This interference study provided deep insight into the dynamics of co-existing WBANs where its adverse effects are observed on energy consumption, delay and throughput.

A wide-band monopole antenna is reported here. This antenna attributes a broad band-width ranging from 1.5 GHz to 7.2 GHz (76.31%) effectful for broad-band wireless application. The antenna comprises of a rectangular metal patch and an altered ground plane. This antenna is named as Antenna XX and is fed with 50 Ω transmission line. Now the antenna is suitably cut at the two corner sides of the metal patch near the feed line and also a rectangular portion of the metal patch has been removed to make the above said antenna perform as a dual band nature. This new geometry of the antenna is named as Antenna YY and provides double band of frequencies. Range of lower bandwidth is 1.7-3.2 GHz having 2.4 GHz middle frequency and range of upper bandwidth is 6.1-7.6 GHz with 6.9 GHz centre frequency. Accessible bandwidths for lower and upper band are 61.44% and 22% individually. The resultant two bands are effective for WLAN and C band applications. These two detailed antennas give monopole similar E-Plane and omnidirectional H-plane radiations patterns. These two antennas are designed and simulated by HFSS software.

An analysis is presented for the flow of non-Newtonian Williamson fluid due to permeable sheet. The recent modification of Fourier’s law of heat conduction, i.e. Model of Cattaneo-Christov heat flux is studied in present article to analysis the heat flux. The permeable sheet undergoes suction and the effect of Soret and Dufour is also investigated The governing boundary layer equations are transformed into a non-dimensional form using appropriate set of transformation and the resulting non-linear coupled system of ordinary differential equations are solved using robust Homotopy Analysis method. The influence of physical parameter affecting the velocity of fluid, heat and mass transfer are discussed and outputs are expressed in figures and tables. Some interesting results are found from the study that the velocity profile is decelerating with increase in magnetic parameter. Increasing Darcy number accelerates the flow due to a corresponding rise in permeability of the regime and concomitant decrease in Darcian impedance.

The silicon based solar cells are expensive, and also said to have limited power conversion efficiency. Though a lot of organic, inorganic and organic-inorganic hybrid solar cells were developed, they could not sustain in long run. This has open doors for the development the ferroelectric based solar cells/photovoltaics. Because the ferroelectric based photovoltaics show high open circuit voltage, short circuit current/current density, unlimited power conversion efficiency, tunable bandgap, high polarization properties, etc. The main reason to shift the focus from semiconductor solar cells is,the ferroelectrics are said to be stable under changing environmental conditions. In addition, such materials help to develop thinner solar cells devices with low cost. Hence, an attempt has been made to understand the photovoltaic response of ferroelectric lead zirconate titanate (PZT). In this paper, we report the review on the photovoltaic properties of PZT films. The literature was collected from various internet sources.

Loss of heat is a significant factor in the performance of internal combustion engines. In addition, a heat transfer phenomenon causes mechanical stresses that are thermally induced, compromising the efficiency of engine components.In engine design, the capability to determine heat transfer in engines plays a vital role. Today, the simulations are progressively being made at a much earlier stage of engine production with numerical simulations In the current research V type multi-cylinder assemblage is modeled. This design is introduced to ANSYS and completed the consistent state thermal and constructional investigation for anticipating heat stress, heat transference, heat flux in contrasting and two distinct materials (FU 4270, FU 2451) from presented material (Aluminium). Heat transfer is the significant part of power change in internal ignition engines. Finding problem areas in a strong wall is utilized as a driving force makes a plan a superior chilling system. Quick transitory heat fluxes with the ignition chamber and the strong divider have to be explored to comprehend the impacts of non-consistent temperatures.

Nanoscience is assumed to have capability to change the efficiency of the current electronic and electrical devices. So nanotechnology is being developed to achieve the same. Various kinds of nanomaterials are being prepared such that they show tremendous properties at the nanoscale dimensions. Hence, it is worth studying about the synthesis of nanomaterials. The information that we present in this paper corresponds to a basic review on the synthesis and recent work done on nanomaterials. The distinctness of this review is that, the classification and major types of nanomaterials has been reported. The literature was collected through internet, from various available sources. The synthesis methods that have been discussed are sputtering, hydrothermal, microwave assisted, and electrochemical and chemical reduction methods.