The monoid of queue actions

We investigate the monoid of transformations that are induced by sequences of writing to and reading from a queue storage. We describe this monoid by means of a confluent and terminating semi-Thue system and study some of its basic algebraic properties, e.g., conjugacy. Moreover, we show that while several properties concerning its rational subsets are undecidable, their uniform membership problem is NL-complete. Furthermore, we present an algebraic characterization of this monoid's recognizable subsets. Finally, we prove that it is not Thurston-automatic

Desenvolvimento inicial e nutrição da copaíba (Copaifera langsdorffi Desf.) em áreas de Cerrado degradado.

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Desenvolvimento inicial da amburana (Amburana cearensis) em áreas de cerrado degradado.

bitstream/item/89537/1/BP201363.pd

Corner reflectors

Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1943.MIT copy bound with: Coupling between 1-5/8" coaxial transmission line and 1 1/2" x 3" waveguide / Melville Clark. 1943.Includes bibliographical references (leaf [23]).by Charles A. Duboc.B.S

Supplementary information for: "Origin of the Zero-Field Splitting in Mononuclear Octahedral Mn-IV Complexes: A Combined Experimental and Theoretical Investigation"

Additional EPR spectra and computational details. Cartesian coordinates of all structures reoriented in a standard way, as explained in the main text.This is the supporting information for the article: Zlatar, M., Gruden, M., Vassilyeva, O. Y., Buvaylo, E. A., Ponomarev, A. N., Zvyagin, S. A., Wosnitza, J., Krzystek, J., Garcia-Fernandez, P.,& Duboc, C. (2016). Origin of the Zero-Field Splitting in Mononuclear Octahedral Mn-IV Complexes: A Combined Experimental and Theoretical Investigation. Inorganic Chemistry, American Chemical Society (ACS)., 55(3), 1192-1201. [https://doi.org/10.1021/acs.inorgchem.5b02368]The published version of the article: [https://cer.ihtm.bg.ac.rs/handle/123456789/1955

Supplementary information for: "Origin of the Zero-Field Splitting in Mononuclear Octahedral Mn-IV Complexes: A Combined Experimental and Theoretical Investigation"

Additional EPR spectra and computational details. Cartesian coordinates of all structures reoriented in a standard way, as explained in the main text.This is the supporting information for the article: Zlatar, M., Gruden, M., Vassilyeva, O. Y., Buvaylo, E. A., Ponomarev, A. N., Zvyagin, S. A., Wosnitza, J., Krzystek, J., Garcia-Fernandez, P.,& Duboc, C. (2016). Origin of the Zero-Field Splitting in Mononuclear Octahedral Mn-IV Complexes: A Combined Experimental and Theoretical Investigation. Inorganic Chemistry, American Chemical Society (ACS)., 55(3), 1192-1201. [https://doi.org/10.1021/acs.inorgchem.5b02368]The published version of the article: [https://cer.ihtm.bg.ac.rs/handle/123456789/1955

Clonal Dissemination Of Vana-type Glycopeptide-resistant Enterococcus Faecalis Between Hospitals Of Two Cities Located 100 Km Apart.

Nosocomial dissemination of glycopeptide-resistant enterococci represents a major problem in hospitals worldwide. In Brazil, the dissemination among hospitals in the city of São Paulo of polyclonal DNA profiles was previously described for vancomycin-resistant Enterococcus faecium. We describe here the dissemination of VanA phenotype E. faecalis between two hospitals located in different cities in the State of São Paulo. The index outbreak occurred in a tertiary care university hospital (HCUSP) in the city of São Paulo and three years later a cluster caused by the same strain was recognized in two patients hospitalized in a private tertiary care hospital (CMC) located 100 km away in the interior of the state. From May to July 1999, 10 strains of vancomycin-resistant E. faecalis were isolated from 10 patients hospitalized in the HCUSP. The DNA genotyping using pulsed-field gel electrophoresis (PFGE) showed that all isolates were originated from the same clone, suggesting nosocomial dissemination. From May to July 2002, three strains of vancomycin-resistant E. faecalis were isolated from two patients hospitalized in CMC and both patients were colonized by the vancomycin-resistant Enterococcus in skin lesions. All isolates from CMC and HCUSP were highly resistant to vancomycin and teicoplanin. The three strains from CMC had minimum inhibitory concentration >256 micro g/ml for vancomycin, and 64 (CMC 1 and CMC 2) and 96 micro g/ml (CMC 3) for teicoplanin, characterizing a profile of VanA resistance to glycopeptides. All strains had the presence of the transposon Tn1546 detected by PCR and were closely related when typed by PFGE. The dissemination of the E. faecalis VanA phenotype among hospitals located in different cities is of great concern because E. faecalis commonly colonizes the gastrointestinal tract of patients and healthy persons for periods varying from weeks to years, which, together with the persistence of vancomycin-resistant Enterococcus in hospital rooms after standard cleaning procedures, increases the risk of the dissemination and reservoir of the bacteria.371339-4

Comparison of disc diffusion, Etest and broth microdilution for testing susceptibility of carbapenem-resistant P. aeruginosa to polymyxins

Abstract\ud \ud \ud \ud Background\ud \ud Considering the increasing use of polymyxins to treat infections due to multidrug resistant Gram-negative in many countries, it is important to evaluate different susceptibility testing methods to this class of antibiotic.\ud \ud \ud \ud Methods\ud \ud Susceptibility of 109 carbapenem-resistant P. aeruginosa to polymyxins was tested comparing broth microdilution (reference method), disc diffusion, and Etest using the new interpretative breakpoints of Clinical and Laboratory Standards Institute.\ud \ud \ud \ud Results\ud \ud Twenty-nine percent of isolates belonged to endemic clone and thus, these strains were excluded of analysis. Among 78 strains evaluated, only one isolate was resistant to polymyxin B by the reference method (MIC: 8.0 μg/mL). Very major and major error rates of 1.2% and 11.5% were detected comparing polymyxin B disc diffusion with the broth microdilution (reference method). Agreement within 1 twofold dilution between Etest and the broth microdilution were 33% for polymyxin B and 79.5% for colistin. One major error and 48.7% minor errors were found comparing polymyxin B Etest with broth microdilution and only 6.4% minor errors with colistin. The concordance between Etest and the broth microdilution (reference method) was respectively 100% for colistin and 90% for polymyxin B.\ud \ud \ud \ud Conclusion\ud \ud Resistance to polymyxins seems to be rare among hospital carbapenem-resistant P. aeruginosa isolates over a six-year period. Our results showed, using the new CLSI criteria, that the disc diffusion susceptibility does not report major errors (false-resistant results) for colistin. On the other hand, showed a high frequency of minor errors and 1 very major error for polymyxin B. Etest presented better results for colistin than polymyxin B. Until these results are reproduced with a large number of polymyxins-resistant P. aeruginosa isolates, susceptibility to polymyxins should be confirmed by a reference method.Financial support: Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP).Financial support: Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)