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Prognostics and health management is a method within the concepts of the Internet of Things, that permits the assessment of a system under its actual application conditions. It integrates sensor data with models that enable in-situ assessment of the “health” (e.g. deviation or degradation) of a system from an expected normal operating condition and also predicts the future state of the system based...
Seeking alternatives not containing In and Ga, the related thin film solar cells (TFSC's) material is Cu2ZnSnS4 (CZTS), which has drawn much attention during past few years because of their easy processing ability, high efficiency at low cost, and environmental eco-friendliness. Moreover, CZTS is composed of earth-abundant elements; it has optical absorption coefficient (105 cm-1) and direct band...
Sustainable success in a fiecely competitive environment requires a business to have creative innovation and forward thinking leadership. As an entrepreneur, I consider myself as student of leadership. In this presentation I outlined my approach for sustainable success by studying the perspectives of numerous corporate leaders and spiritual leaders. In summary I learned that Entrepreunership and leadership...
Actuator applications of piezoelectrics started in late 1970s, and enormous investment was installed on practical developments during '80s, aiming at consumer applications such as precision positioners with high strain materials, multilayer device designing and mass-fabrication processes for portable electronic devices, ultrasonic motors for micro-robotics and smart structures. After the slump due...
DC SQUID sensors based on Nb-AlOx-Nb Josephson junctions were designed and developed at IGCAR, Kalpakkam. Necessary electronics to linearize the SQUID output was developed in-house. These SQUID sensors were used to develop various measuring systems like SQUID magnetometer, SQUID based NonDestructive Evaluation system and multichannel SQUID based biomagnetic measuring systems. In addition supportive...
The presentation describes the function of rockets to launch the space shuttle into the space, different processes involved in rocket manufacturing, fuel mixing process including ingredients of the fuel, casting, static test, igniter installation, shipment of the segments to Kennedy Space Center (KSC), assembly at KSC, etc. It also involves space Orbiter installation, launch preparation, launch, motor...
This research presents a metal functionalized titanium dioxide (TiO2) nanotube based sensor developed for detection of volatile biomarkers (methyl p-anisate and methyl nicotinate) associated with tuberculosis (TB). In this work self-aligning TiO2 nanotubes were fabricated, and functionalized with cobalt for specific binding to the volatile biomarkers of interest. Mimics of the volatile biomarkers...
Studies on infectious diseases have helped us understand the extent to which public health systems would benefit from mapping the real-time distribution, condition and treatment efficacy of infectious diseases. Evidence suggests there is deficiency in timely and relevant geographic information that is undermining clinical, epidemiological and public health aspirations in areas affected with epidemic-prone...
Nanoparticles conjugated with biomolecules are promising building blocks for assembly into nanostructured functional materials for developing biomarker platforms because of their size dependent optical and electrical properties. Nanoparticles and nanodevices enable study of a wide range of biological phenomena extending from biomolecular interactions such as protein-protein, antibody-antigen or DNA...
There is a growing interest on microfluidic immunosensors for use as point-of-care diagnostic devices. In typical microfluidic immunosensors, the channel walls are functionalized with antibodies through intermediate linker molecules. The carrier fluid containing the antigens flows through the channels, and the antigens diffuse and electromigrate to the walls as the carrier fluid is convected along...
The objective of this work is to make a Surface Electromyography (EMG) signal detection sensor to test and analyze human motion pattern. EMG signal has a very small amplitude level and a frequency range of 20 Hz to 200 Hz. In order to realize the sensor, a circuit and its single layer PCB has been designed to amplify and filter the differential potential between Ag/AgCl electrodes at different points...
In this letter we show the effect of rotation of two oscillators on the sensitivity performance of two SAW coupled oscillator sensor configuration. The dependence of synchronization frequencies on the frequency detuning between the two counter-rotating oscillators, the insertion loss and delay of the coupling SAW delay line are analysed. The sensitivity for SAW coupled counter-rotating oscillators...
Titanium oxide films were prepared on ITO coated glass substrates at 350 C using titanium (IV) isopropoxide, acetylacetonate and absolute ethanol as precursors by spray pyrolysis technique. The prepared films were characterized by X-ray diffraction, Scanning electron microscope, Fourier transform infrared spectroscopy and Energy dispersive analysis of X-rays. Estimated optical and electrical parameters...
Star Sensor, also known as star-tracker, is a high-accuracy 3-axis attitude sensor used onboard spacecrafts. It processes stars from a sky image captured using an area imaging detector (generally 1k × 1k pixels Charge Coupled Device) to generate attitude information. Its accuracy about the boresight is poorer than about the cross-axes. This is improved by using two sensor heads with staggered Fields-Of-View...
Ion-Sensitive Field-Effect Transistor (ISFET) is a popular potentiometric chemical/bio-chemical sensor. However, due to charge screening, the sensitivity of the device is significantly reduced. A logarithmic dependence is exhibited between the charge present at the electrolyte-insulator interface and the charge mirrored in the conducting channel, which limits the sensitivity of an ideal conventional...
In the current paper lead-free piezoelectric ceramics BNKT, [Bi0.5(Na0.85K0.15)0.5]1−xSrxTiO3 (where x=0, 0.02, 0.04, 0.06) are prepared by conventional solid state route. Calcination studies are carried out to optimize the properties. XRD studies are carried out to confirm the perovskite phase formation. The powders are prepared in the form of discs of 10 mm diameter and 1.0 mm thickness. Subsequently,...
This paper briefly explains the requirement of having reliable hybrid renewable energy sources for the sustainability of energy security of the grid. The wave parameters affecting electrical power potential of ocean waves and how these parameters are being sensed is being studied. Also the causes of waves are also discussed and these parameters are examined as well. A hybrid system with WECS and PV...
Highly porous zinc ferrite (ZnFe2O4) nano-size powders are synthesized by varying fuel to oxidizer ratio. The metal nitrates are used as oxidizers while glycine is used as a fuel. The synthesis of material is carried out using an auto-combustion method. It is observed that the enhancement of magnetization occur with the enhancement of ‘Fuel to Oxidizer’ ratio i.e. Glycine to metal Nitrate (G/N) ratio...
ATP conferred protection of silver nanoparticles (AgNPs) against salt induced aggregation has been used as a simple, sensitive and cost effective tool for detection of acid phosphatase (ACP) activity. In the absence of the enzymes, unreacted ATP protects AgNPs from salt-induced aggregation. Dephosphorylation of ATP in the presence of the enzyme reduces the protecting action of ATP and thus there is...
The nAg/PVP and nAg/PVA composites were synthesized by using chemical reduction method. The neat Poly vinyl pyrrolidone (PVP) and polyvinyl alcohol (PVA) at different concentrations and their nano metal polymer composites were studied for electrical humidity sensing, ranging from 5–90% RH. The neat polymers and their composites were coated on ceramic rods having built in electrodes by drop casting...
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