Speech analysis; synthesis and perception / | Nielsen …
Dr. Sara Pellegrino is an Assistant Professor of Organic Chemistry at the University of Milano, Department of Pharmaceutical Sciences, Italy. She received her Ph. D in Medicinal Chemistry from the University of Milano in 2005. She has been visiting scientist at the University of Regensburg (Germany) in 2005-2006. Her research interests are the synthesis of peptides and peptide mimics, and their application in Material Science, Catalysis, Biochemistry and Medicinal Chemistry. She is author of more than 50 papers in peer-reviewed journals, of two patents filed, and of 60 communications at international conferences.
Speech Analysis Synthesis and Perception pp 204-276 ..
Presently for reducing sizes of stones from 10cm x 10cm to 2.5cm x 2.5cm in quarries is laborious job and is done manually our approach is to design a best optimum mechanism for said conditions.
Key words: Dynamic, Kinematic synthesis and analysis, Sector gear, Static.
1) Anjali J.
Inorganic fertilizers along with high yielding varieties have contributed immensely for success of green revolution. Increasing pressure towards food production globally demands unconscientious fertilizer usage in future as well. Nitrogenous fertilizers are the extensively used fertilizers but also suffer huge losses from agriculture ecosystem due to faster rate of release which is not synchronized with crop demand. Thus resulting in low nitrogen use efficiency. In order to have a sustained release of nitrogen from fertilizer, nanoparticle coated with urea is an effective option. We report urea coated hydroxyapatite based nanofertilizer and its performance on aerobic paddy. In this study hydroxyapatite (HA) nanoparticles were synthesized by adding orthophosphoric acid to calcium hydroxide solution under constant vigorous stirring. Saturated urea solution was added to the HA particle suspension and was stirred continuously for 12 hours for surface modification. The urea modified HA particles were washed and dried at 65ºC. Hydroxyapatite nanoparticles (HA) and urea coated hydroxyapatite nanoparticles (UHA) were characterized using Dynamic Light Scattering (DLS), Scanning Electron Microscope (SEM), Powder X-ray Diffraction (PXRD) and Fourier Transform Infrared (FTIR) Spectroscopy. Nitrogen content of UHA was analyzed using Kjeldahl method. Nitrogen content of UHA particles was found to be 36% and Zeta potential was 165.0 mV indicating stable nanodispersion. PXRD pattern of UHA particles indicated the presence of peaks due to hydroxyapatite and urea. SEM images of UHA particles exhibited oblong structures resembling rice grains with diameter less than 90 nm. FTIR spectroscopy showed prominent peaks around γmax/cm–1 1041 indicating phosphate group in hydroxyapatite and γmax/cm–1 3336 and 3432 indicating presence of urea. Synthesized nanofertilizer was evaluated on aerobic paddy under completely randomized design and was compared with recommended dose of conventional urea (100kgN/ha) in aerobic paddy. Nanofertilizer at 25% of recommended dose recorded highest grain yield. Nanofertilizer@ 50% dose showed similar performace to 100% dose of conventional urea. The results indicate amount of fertilizer application into soil can be reduced than regular dosage with nanofertilizer without affecting the yield. This will reduce environmental pollution of water and soil without compromising agricultural production.
J. L. Flanagan — Speech Analysis Synthesis and Perception
Dr. Naoufel Khemiri is an Assistant Professor at El Manar Preparatory Engineering Institute in Tunisia. He obtained his Ph.D thesis in “Condensed Matter Physics” from the Faculty of Sciences of Tunis (FST), University of Tunis El Manar, Tunisia in 2012. He is now member of Photovoltaic and Semiconductor Materials Laboratory (ENIT, Tunis, Tunisia). He works mainly on the synthesis and the characterization of ternary and quaternary compounds (CuInS2, Zn(S,O), SnSb4S7, Cu2ZnSnS4 and Cu2ZnxFe1-xSnS4) for opto-electronic and solar cell applications. He published more than 20 papers in International Journals with impact factor and participated in several international conferences in materials science.
Speech Analysis, Synthesis and Perception - IOPscience
The DLS analysisshowed the particle distribution of synthesized silver nanoparticles in solution, and SEM analysis showed the morphology of nanoparticles.
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Carbon based graphene oxide was synthesized by a modified Hummer’s method with different ratios of graphite to sodium nitrate (NaNO3) of 1:1, 1:2, and 2:1. These variations were carried out to determine which conditions would afford more oxygen functional groups. The products obtained, namely, GO1:1, GO1:2, GO2:1, were characterized by means of powder X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, elemental analysis, and Raman spectroscopy. XRD revealed that GO2:1 is more crystalline than either GO1:1 or GO1:2, while Raman spectroscopy confirmed the in-phase vibration (G-band) of GO2:1 at 1596 nm and the disorder band (D-band) at 1347 nm. Also, TEM showed the expected layer structure of the graphene oxide sheet. FTIR revealed the presence of oxygen functional groups while the elemental analysis confirmed that GO 2:1 has more oxygen functional groups than GO1:1 and GO1:2. Thus, the synthesis of GO with a limited amount of sodium nitrate provided a more crystalline and oxygen-functionalized material.