2,256 research outputs found
Daptomycin susceptibility of unusual gram-positive bacteria: comparison of results obtained by the Etest and the broth microdilution method
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Comparative bactericidal activities of daptomycin, glycopeptides, linezolid and tigecycline against blood isolates of Gram-positive bacteria in Taiwan.
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Nutritionally variant Streptococcal infections at a university hospital in Taiwan: Disease emergence and high prevalence of -lactam and macrolide resistance.
No full textEffects of oxidizers on the ignition and combustion characteristics of aluminum nanoparticles
No full textIgnition and combustion of Aluminum nanoparticles (ANPs) under complex environments are of great signifi cance for various propulsion systems. In this study, we investigated the oxidation process of ANPs in O2, CO2, H2O, and their mixture atmospheres using reactive molecular dynamics. In the mixture atmospheres, ANPs experience a shorter ignition delay and parts of C and H atoms are involved in a new reaction named re oxidation, where the nonbonded C and H inside ANPs detach from particle and re bond with free O in the environment to produce extra CO and H2O. It reduces C and H in unreactive diffusion and increases O in reactive diffusion. Additionally, it is found that the ignition delay time and reaction heat release can be adjusted to achieve the optimal performance of ANPs combustion by tailoring the contents of O2, CO2, and H2O in the environment. Our works provide a theoretical basis for the precise regulation of ANPs energy release
Option Pricing Using the Martingale Approach with Polynomial Interpolation
No full text[[abstract]]This study shows that in particular cases, the minimal martingale measure coincides with the Esscher martingale measure. Using the martingale approach can produce an exact solution for the price of a European call option on an asset modeled as an exponential Levy process when a closed-form expression exists for the Levy measure under some integrability conditions. If the jump component vanishes, the solution reduces to the BlackScholes formula. To compute the option price accurately and quickly, this study uses polynomial interpolation with divided differences. A numerical analysis compares the accuracy and CPU time of the latter method with those of three Fourier-based formulas described by Lewis (2001). (c) 2012 Wiley Periodicals, Inc. Jrl Fut Mark 33:469-491, 2013[[note]]SSC
Comprehensive modeling of ignition and combustion of multiscale aluminum particles under various pressure conditions
No full textThe ignition and combustion of aluminum particles are crucial to achieve optimal energy release in propulsion and power systems within a limited residence time. This study seeks to develop theoretical ignition and combustion models for aluminum particles ranging from 10 nm to 1000 mu m under wide pressure ranges of normal to beyond 10 MPa. Firstly, a parametric analysis illustrates that the convective heat transfer and heterogeneous surface reaction are strongly influenced by pressure, which directly affects the ignition process. Accordingly, the ignition delay time can be correlated with pressure through the p(b) relationship, with b increasing from -1 to -0.1 as the system transitions from the free molecular regime to the continuum regime. Then, the circuit comparison analysis method was used to interpret an empirical formula capable of predicting the ignition delay time of aluminum particles over a wide range of pressures in N-2, O-2, H2O, and CO2 atmospheres. Secondly, an analysis of experimental data indicates that the exponents of pressure dependence in the combustion time of large micron-sized particles and nanoparticles are -0.15 and -0.65, respectively. Further, the dominant combustion mechanism of multiscale aluminum particles was quantitatively demonstrated through the Damk & ouml;hler number (Da) concept. Results have shown that aluminum combustion is mainly controlled by diffusion as Da > 10, by chemical kinetics when Da <= 0.1, and codetermined by both diffusion and chemical kinetics when 0.1 < Da <= 10. Finally, an empirical formula was proposed to predict the combustion time of multiscale aluminum particles under high pressure, which showed good agreement with available experimental data
»LJ« Artist book
Full text linkThe thesis paper deals with the artist book, an art form that has become a part of the university curriculum since the beginning of my university studies. It is most closely connected with the fields of sketch and photography. Both personl sketch and the field of photography have been of particular interest to me during my university years and I prepared an exhibition on the subject, presented by Faculty of Education Gallery. This thesis covers the historical and theoretical background of the artist book and maps the creation of my own artist book, an artistic superaddition titled LJ.
Some of the pioneers of the artist book are also mentioned, including Ed Ruscha, the author of the Twenty Six Gasoline Stations. He was one of the first artist to draw attention to the various artistic possibilities of this art form intertwining different graphic components including sketch, photography, font, paper characteristic, and other visual effects. Franc zagoričnik is presented as a native artist interested in the art form. He was a member of the OHO group, which reached the same conclusions as Ruscha in the 1970s.
The thesis places the artist book within the field of education, since this particular pedagogical approach has been shown to give the pupil freedom of choice and thus enrich his sensibilty to artistic expression. Pratical reasearch was conducted at a high school in Koper, while theoretical research heavily relied on the MGLC library, which is the only Slovene library to carry contemporary literature on this particular art form
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