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Search Results: 1 - 10 of 1786 matches for " YADAV RAGHVENDRA SATYANARAYAN "
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Intelligent Wireless Emergency Alert System for Patient Monitoring using AT89S52 Microcontroller
International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering , 2013,
Abstract: In the past pace of life it is difficult for people to be constantly available for their near ones who might need them while they are suffering from any disease or physical disorder. So constant monitoring of the patient’s body parameters such as body temperature, Pulse rate and sugar level etc becomes difficult. Generally in ICUs nurses are taking care of abnormalities n the health of the patient but they may not be available for taking care of patient’s health 24X7. So sometimes in absence of care taker it may happens that the health of the patient becomes abnormal /critical from normal condition. So to remove these critical conditions we have proposed an automatic low cost microcontroller & intelligent Wireless GSM based Advanced patient monitoring system which continuously in the regular interval of time (DS1307 RTC for clock) measuring the intensive parameter of the patient’s health and if any abnormal condition occurs, it directly give a message to the doctor’s cell phone that particular word no’s particular parameter is out of the range. Due to this alert message, Doctor can do the fast assessment of the patient’s health without wasting the time.
Blue-Shift and Enhanced Photoluminescence in BaMgAl10O17:Eu2+ Nanophosphor under VUV Excitation for PDPs Application  [PDF]
Raghvendra Singh Yadav, Shiv Kumar Pandey, Avinash Chandra Pandey
Materials Sciences and Applications (MSA) , 2010, DOI: 10.4236/msa.2010.11005
Abstract: In this report, five systems of varied diameters viz. 62 nm, 85 nm, 115 nm, 160 nm and 450 nm of BaMgAl10O17:Eu2+ nanorods are prepared by solution combustion approach and with annealing at different temperature in reduced atmosphere (N2 + H2). An intense broad blue photoluminescence (PL), corresponding to the electronic transition of Eu2+ from the 4f 6 5d excited state to the 4f 7 ground state, is observed. The blue-shift and enhanced photoluminescence is also observed, and found to be highly dependent on the size of diameter of BaMgAl10O17:Eu2+ nanostructures. The change in decay time and color-coordinates with change in size of diameter of BaMgAl10O17:Eu2+ nanostructure have been analysed and thoroughly discussed.
Toxicity Concerns of Semiconducting Nanostructures on Aquatic Plant Hydrilla verticillata
Mishra, Priya,Shukla, Vineet K.,Yadav, Raghvendra S.,Pandey, Avinash C.
Journal of Stress Physiology & Biochemistry , 2013,
Abstract: In this article, we have examined toxicity of nanostructures such as flower-like ZnO capped with starch, spherical uncapped ZnO and spherical CdS on aquatic plant Hydrilla verticillata, which has not done before. Hydrilla plant was exposed by these nanoparticles at a concentration of 400 mg/L for 7 days and changes in the biochemical parameters such as catalase activity, chlorophyll content and protein content were observed. It was perceived that spherical CdS nanoparticles were more toxic than the corresponding ZnO nanoparticles since there was a decrease in chlorophyll content and increase in catalase activity. This effort upsurge an interest in understanding the hazards of nanomaterials and their risk, which poses an impact on our environment and how they can be monitored via simple biochemical assays on plant systems.
Golden Research Thoughts , 2013, DOI: 10.9780/22315063
Abstract: Waste electrical and electronic equipments (WEEE) waste is one of the most hazardous and fast growing waste. The WEEE/ E-waste crisis has reached epic proportions due of two primary characteristics: E-waste is hazardous and E-waste contains over 1000 different substances many of which are toxic and create serious environmental pollution problems upon disposal. One of the sources of e-waste is condensers, cooling units' insulation wires, older floppy and transmitters which on disposal leaches out certain toxic chemicals which reaches water bodies. They exert toxicity on fauna and flora. Mostly the fish community gets affected, gets bioaccumulated in their tissues and ultimately leads to bio-magnification. They cause cancer and affect the reproductive system of fish. In the process gradually the fish population will decrease and ultimately perish if it is not controlled. The e-waste compounds may also cause mutagenicity in plants and humans. E-waste/ WEEE waste can be managed by following few methods: Incineration/ Pyrolysis, Recycle/ reuse/ recovery facility, Secure landfills. Recycling and reuse of the waste helps in reduction of the volume of waste for disposal. Resource recovery is a method to turn wastes into resources by recovering usable products both materials (like metals) and energy.
Study of Structural and Optoelectronic Properties of ZnO Codoped with Ca and Mg
Manoj Kumar Mishra,Amarendra Narayan,Rakesh Kumar Singh,Raghvendra Singh Yadav,Navendra Kumar Nidhi,Avinash Chandra Pandey
Indian Journal of Materials Science , 2013, DOI: 10.1155/2013/405147
Abstract: ZnO codoped with Ca and Mg in various proportions was prepared by a chemical method and annealed at 600?C. The structural and optical properties of these oxide samples were systematically studied by XRD, SEM, EDS, and PL spectrometer. XRD pattern shows a hexagonal wurtzite structure. The size of particle as shown by XRD machine and calculated by Scherer’s formula is found in the nano range. The formation of particles showed that they were polycrystalline. Due to larger ionic and covalent radii of Ca than those of Zinc, a lattice deformation occurs with the development of strain field. New phases were observed in XRD pattern of few samples ZnO-2.2 and ZnO-2.4. SEM micrograph shows the formation of nanoparticles. EDS study confirms the codoping of ZnO with Ca and Mg. Optical properties like photoluminescence emission showed a blue shift in peak wavelength. General conductivity and photoconductivity were found high in samples containing certain proportion of Ca and Mg in comparison with pure ZnO. 1. Introduction Zinc Oxide has attracted a lot of research interest due to its enormous potential for application in a variety of optoelectronic and electronic devices. The main advantages of ZnO for optoelectronic applications are its large exciton binding energy [60?mev], wide band gap energy of 3.2?ev at room temperature, and the existence of well developed bulk and epitaxial growth processes. ZnO can be prepared by an easy and cheap chemical method. It is nonpoisonous; so it can be used widely. ZnO thin films are used as transparent electrodes in photovoltaic cell in place of expensive Indium Tin Oxide [1]. ZnO nanowires have also been investigated as gas sensors [2, 3]. ZnO is suitable for UV detection by using its photoconduction properties [3]. ZnO normally forms in the hexagonal (wurtzite) crystal structure with and . The Zn atoms are tetrahedrally coordinated with four O atoms where the d-electrons of Zn hybridize with the p-electrons of O. Layers occupied by Zinc atoms alternate with layers occupied by Oxygen atoms. Presence of free electrons in undoped ZnO has been attributed to Zn interstitials and Oxygen vacancies [4]. The intrinsic defect levels that lead to n-type doping lie approximately 0.01 to 0.05?ev below the conduction band. The photoluminescence study of ZnO reflect the intrinsic direct band gap, a strongly bound exciton state, and the gap states due to point defects [4]. Visible emissions in violet blue, green, and red orange range in case of ZnO are due to transitions between self-activated centers formed by doubly ionized Zinc Vacancy and
Dorso-palmar triangular finger flap-A new advancement flap for cover of finger amputations-A preliminary report
Mishra Satyanarayan
Indian Journal of Plastic Surgery , 2001,
Abstract: A triangular V-Y type advancement flap on the finger has been designed, which advances skin from over the whole circumference of the finger, which includes both palmar and dorsal skin. The flap is sensate too. It is indicated for finger and thumb amputations proximal to the body of the nail. Six flaps were raised with five successes and one partial necrosis. This is a preliminary report on a new flap.
Bipolar and multipolar Jets in protoplanetary and planetary nebulae
Sahai Raghvendra
Revista mexicana de astronomía y astrofísica , 2002,
Abstract: Uno de los retos m as emocionantes con que actualmente se enfrentan las teor as de evoluci on posterior a la secuencia principal, es entender c omo estrellas AGB (ingl. "Asymptotic Giant Branch") y sus envolturas cicunestelares esf ericas (siglas en ingl es: CSEs) se transforman en nebulosas planetarias (NPs) con su asombrosa variedad de morfolog as asf ericas. El modelo m as exitoso para dar forma a los NPs|el modelo generalizado de vientos estelares interactuantes, en el cual un viento esf erico de alta velocidad (> 1000 km s...
Signal Oscillation Is Another Reason for Variability in Microarray-Based Gene Expression Quantification
Raghvendra Singh
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0054753
Abstract: Microarrays have been widely used for various biological applications, such as, gene expression profiling, determination of SNPs, and disease profiling. However, quantification and analysis of microarray data have been a challenge. Previously, by taking into account translational and rotational diffusion of the target DNA, we have shown that the rate of hybridization depends on its size. Here, by mathematical modeling of surface diffusion of transcript, we show that the dynamics of hybridization on DNA microarray surface is inherently oscillatory and the amplitude of oscillation depends on fluid velocity. We found that high fluid velocity enhances the signal without affecting the background, and reduces the oscillation, thereby reducing likelihood of inter- and intra-experiment variability. We further show that a strong probe reduces dependence of signal-to-noise ratio on probe strength, decreasing inter-microarray variability. On the other hand, weaker probes are required for SNP detection. Therefore, we recommend high fluid velocity and strong probes for all microarray applications except determination of SNPs. For SNP detection, we recommend high fluid velocity with weak probe on the spot. We also recommend a surface with high adsorption and desorption rates of transcripts.
On a higher-order evolution equation with a Stepanov-bounded solution
Aribindi Satyanarayan Rao
International Journal of Mathematics and Mathematical Sciences , 2004, DOI: 10.1155/s0161171204306277
Abstract: We study strong solutions u:ℝ→X, a Banach space X, of the nth-order evolution equation u(n)−Au(n−1)=f, an infinitesimal generator of a strongly continuous group A:D(A)⊆X→X, and a given forcing term f:ℝ→X. It is shown that if X is reflexive, u and u(n−1) are Stepanov-bounded, and f is Stepanov almost periodic, then u and all derivatives u′,…,u(n−1) are strongly almost periodic. In the case of a general Banach space X, a corresponding result is obtained, proving weak almost periodicity of u, u′,…,u(n−1).
On an th-order infinitesimal generator and time-dependent operator differential equation with a strongly almost periodic solution
Aribindi Satyanarayan Rao
International Journal of Mathematics and Mathematical Sciences , 2002, DOI: 10.1155/s0161171202108295
Abstract: In a Banach space, if u is a Stepanov almost periodic solution of a certain nth-order infinitesimal generator and time-dependent operator differential equation with a Stepanov almost periodic forcing function, then u,u′,…,u (n−2) are all strongly almost periodic and u (n−1) is weakly almost periodic.
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