2,167 research outputs found
Asynchronous Distributed Generation System Based On Asymmetrical Cascaded Multilevel Inverter
No full textAn asynchronous distributed generation (DG) single-phase system is proposed. It is based on an asymmetrical cascaded multilevel inverter with 19 levels and it is supplied by asynchronous voltage sources. It is possible to operate continuously the proposed GD system during the grid-connected or the stand-alone modes. Details about its operation modes are presented. A prototype of the proposed GD system has been implemented on a fixed-point DSP TMS320F2812. An injection of only active power into the grid utility and an uninterrupted load supply have been pursued. Simulation and experimental results presents the performance of the proposed GD system. © 2008 IEEE.32273232Jung, S., Bae, Y., Choi, S., Kim, H., A low cost utility interactive inverter for residential power generation (2006) IEEE Power Electronics Specialists Conf. (PESC'06), pp. 1-6(2003) IEEE Standard for Interconnecting Distributed Resources with Electric Power Systems, , IEEE Std. 1547Rodriguez, J., Lai, J.-S., Peng, F.Z., Multilevel inverters: A survey of topologies, controls, and applications (2002) IEEE Trans. on Industrial Electronics, 49 (4), pp. 724-738. , AugustPimentel, S.P., Application of multilevel inverter for active power filters, (2006), Master's thesis, School of Electrical and Computer Engineering FEEC, University of Campinas, UNICAMP, BrazilNunez-Zuniga, T., Pomilio, J., Shunt active power filter synthesizing resistive loads (2002) IEEE Trans. on Power Electronics, 17 (2), pp. 273-278. , MarchSilva, L.A., Pimentel, S.P., Pomilio, J.A., Nineteen-level active filter system using asymmetrical cascaded converter with dc voltages control (2005) IEEE Power Electronics Specialists Conf. (PESC'05), pp. 303-308Jung, Y., Choi, J., Yu, B., Yu, G., Optimal design of active antiislanding method using digital pll for grid-connected inverters (2006) IEEE Power Electronics Specialists Conf. (PESC'06), pp. 1-6Padua, M., Deckmann, S., Marafao, F., Frequency-adjustable positive sequence detector for power conditioning applications (2005) IEEE Power Electronics Specialists Conf. (PESC'05), pp. 1928-1934Zmood, D., Holmes, D., Stationary frame current regulation of pwm inverters with zero steady-state error (2003) IEEE Trans. on Power Electronics, 18 (3), pp. 814-822. , Ma
DS_10.1177_0022034520906842_AppendixFigure1 – Supplemental material for Subgingival Host-Microbial Interactions in Hyperglycemic Individuals
No full textSupplemental material, DS_10.1177_0022034520906842_AppendixFigure1 for Subgingival Host-Microbial Interactions in Hyperglycemic Individuals by P.S. Kumar, M.F. Monteiro, S.M. Dabdoub, G.L. Miranda, M.Z. Casati, F.V. Ribeiro, F.R. Cirano, S.P. Pimentel and R.C.V. Casarin in Journal of Dental Research</p
DS_10.1177_0022034520906842_MainArticleFigure2 – Supplemental material for Subgingival Host-Microbial Interactions in Hyperglycemic Individuals
No full textSupplemental material, DS_10.1177_0022034520906842_MainArticleFigure2 for Subgingival Host-Microbial Interactions in Hyperglycemic Individuals by P.S. Kumar, M.F. Monteiro, S.M. Dabdoub, G.L. Miranda, M.Z. Casati, F.V. Ribeiro, F.R. Cirano, S.P. Pimentel and R.C.V. Casarin in Journal of Dental Research</p
DS_10.1177_0022034520906842_AppendixTable2 – Supplemental material for Subgingival Host-Microbial Interactions in Hyperglycemic Individuals
No full textSupplemental material, DS_10.1177_0022034520906842_AppendixTable2 for Subgingival Host-Microbial Interactions in Hyperglycemic Individuals by P.S. Kumar, M.F. Monteiro, S.M. Dabdoub, G.L. Miranda, M.Z. Casati, F.V. Ribeiro, F.R. Cirano, S.P. Pimentel and R.C.V. Casarin in Journal of Dental Research</p
DS_10.1177_0022034520906842 – Supplemental material for Subgingival Host-Microbial Interactions in Hyperglycemic Individuals
No full textSupplemental material, DS_10.1177_0022034520906842 for Subgingival Host-Microbial Interactions in Hyperglycemic Individuals by P.S. Kumar, M.F. Monteiro, S.M. Dabdoub, G.L. Miranda, M.Z. Casati, F.V. Ribeiro, F.R. Cirano, S.P. Pimentel and R.C.V. Casarin in Journal of Dental Research</p
Implicit large-eddy simulation of the stratocumulus-topped boundary layer: A grid sensitivity study
No full textA range of implicit large-eddy simulations of the stratocumulus-topped boundary layer is performed to study the influence of grid resolution on selected parameters including liquid water path and second and third moments of vertical velocity fluctuations. The simulations are based on two sets of aircraft measurements, which are also used to evaluate the results of the simulations. The specific case presented here indicates that simulations with a grid aspect ratio accounting for the anisotropic nature of the turbulence near the surface and at the top of the boundary layer lead to better agreement with measurements than simulations with an isotropic grid
Entrainment and detrainment rates from the piv measurements at the top of laboratory analogs of stratocumulus and cumulus clouds
No full textWe analyze mixing at the top of laboratory analogs of convective clouds: stratocumulus and cumulus to investigate entrainment of environmental air into the cloud. We retrieve two components of air velocity using Particle Image Velocimetry technique. Suitable image processing allows to determine cloud–clear air interface. Using velocity differences between cloudy and clear sides of the interface we calculate entrainment / detrainment rates
Prof. S.P. Fedorov — founder of urology in Russia (150th anniversary of the birthday)
No full textThis article presents the important scientific achievements of S.P. Fedorov as a urologist. S.P. Fedorov is the author of over 120 scientific papers. It was noted that in 1892 he was the first in Russia to prepare and use cholera antitoxin for the treatment of patients, then tetanus toxin and antitoxin, found that antitoxin protects against tetanus if it is administered simultaneously with the toxin. Abroad S.P. Fedorov studied the system of aseptic mode of operation from K. Schimmelbush, and L. Casper studied the method of cystoscopy and catheterization of the ureters and other endoscopic methods that appeared at that time. It was shown that S.P. Fedorov developed new surgeries — in situ pyelotomy, subcapsular nephrectomy, and new surgical instruments were proposed. He is rightly called the father of Russian urology. The circumstance is analyzed that the main direction of S.P. Fedorov's scientific activity was the problems of surgery of the urinary and biliary tracts. He summarized the extensive experience of the surgeon in the Atlas of Cystoscopy and Rectoscopy (1911), the Surgery of the Kidneys and Ureters (1923-1925), and others. Galpernom edition of the surgical journal «New Surgical Archive», essentially the first Soviet surgical journal, created in the difficult years of the Civil War and post-war devastation. He was the editor of the 1st edition of the BME, together with S.S. Girgolavom and A.V. Martynov was the editor of the multivolume Guide to Practical Surgery. S.P. Fedorov created a major domestic surgical school, from which dozens of specialists, heads of surgical departments of medical universities in various cities of the USSR graduated. The name of S.P. Fedorov was given to the department of hospital surgery of the Military Medical Academy. S.M. Kirov. It is noted that he was the first of the Soviet surgeons to be awarded the Order of Lenin (1933)
Measurements of turbulence at stratocumulus top
No full textUsing 1m resolution airborne data from research flights we divide stratocumulus top region into sublayers and characterize properties of turbulence in each sublayer. Results indicate, that there are no clear differences of turbulence properties between thermodynamically different "calassical" and "non-classical" stratocumulus regimes, but there are clear signs of turbulence ainsotropy in stably stratified sublayers in the cloud top region
S.P. Breckinridge letter to Lucile Atcherson, April 1, 1914
No full textOn April 1, 1914, S.P. Breckinridge, an educator and activist, sent this letter to Lucile Atcherson, a suffragist in central Ohio and executive secretary for the Franklin County Woman Suffrage Association, informing Atcherson of the letter Breckinridge sent to the wife of William O. Thompson, President of the Ohio State University. Breckinridge's hope was that college women at Ohio State would make an impact in the Ohio women's suffrage movement.
The Franklin County Woman Suffrage Association was formed in 1912, after the Ohio Constitutional Convention elected to bring to a vote the question of removing the words "white male" from the state constitution with regard to voting rights. Headquartered in the Chamber of Commerce building in Columbus, Ohio, the organization put out regular publications, organized public speeches and meetings, distributed literature and held parades in support of the suffrage movement. Women's suffrage in Ohio was defeated in a special election in 1912 and again in 1914 and 1916 before a resolution narrowly passed in 1917 allowing municipal voting by women in Columbus. In 1920, the 19th Amendment passed, extending the vote to women and prohibiting state and federal government from denying suffrage on the basis of sex
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