2,086 research outputs found
A reservoir for inverse power law decoherence of a qubit
The exact dynamics of a Jaynes-Cummings model for a qubit interacting with a
continuous distribution of bosons, characterized by a special form of the
spectral density, is evaluated analytically. The special reservoir is designed
to induce anomalous decoherence, resulting in an inverse power law relaxation,
of power 3/2, over an evaluated long time scale. If compared to the
exponential-like relaxation obtained from the original Jaynes-Cummings model
for Lorentzian-type spectral density functions, decoherence is strongly
suppressed. The special reservoir exhibits an upper band edge frequency
coinciding with the qubit transition frequency. Known theoretical models of
photonic band gap media suitable for the realization of the designed reservoir
are proposed.Comment: 5 pages, 2 figure
Electrical characterization of SnO2 : Sb ultrathin films obtained by controlled thickness deposition.
Mapeamento de QTL (quantitative trait loci) associados à resistência do maracujá-doce à bacteriose.
PGI12 Organizational and Economic Issues Related to the Introduction of Boceprevir in the Treatment of Patients with Genotype 1 Chronic Hepatitis C in Italy
n/
Naevoid basal cell carcinoma syndrome in a 22-month-old child presenting with multiple basal cell carcinomas and a fetal rhabdomyoma
Validation of a questionnaire for young women to assess knowledge, attitudes and behaviors towards cervical screening and vaccination against HPV in Italy
Background: Despite knowledge about HPV may be an important determinant for vaccine acceptance and uptake, only few studies have assessed HPV-related knowledge in young females. The aim of this study was to assess the reliability and validity of the questionnaire, in Italian women ≥18 years old, as a tool to examine knowledge, attitudes and behaviors towards screening and vaccination against HPV and reliable source of information. Methods: The questionnaire was administered to 30 girls in anonymous, voluntary and self -administered form with close-ended type of questions, except for the socio-demographic characteristics. It was composed in 3 sections for a total of 69 items. Participation in the study was entirely voluntary and anonymous. Descriptive analyses were performed using frequencies, percentages, and frequency table for categorical variables. Reliability analysis was tested and content validity was evaluated using Cronbach's alpha to check internal consistency and avoid misinterpretation of the results. The study was conducted in 4 Italian cities: Ferrara, Rome, Cassino and Palermo, to represent the different Italian geographical areas and knowledge, attitudes and behaviors towards screening and vaccination against HPV and reliable source of information. Data were collected in October 2010. Statistical analysis was performed with the statistical software for Windows SPSS, version 19.0. Results: The highest value of Cronbach's alpha resulted on 24 items (alpha= 0,774); the addition of other items, one at a time, decreased the value. Cronbach's alpha on all the 3 sections together resulted in a value of 0, 059. Young women generally knew that HPV can cause cervical cancer (93.3%) and genital warts (16.7%) and 76.7% of them recognized Pap-test as a screening tool. The main sources of information about HPV vaccination are represented by magazines / books (33.3%), TV (26.7%), and gynecologists (23.3%). Conclusions: This pilot study demonstrated that a short version of the questionnaire has very good reliability properties in the study and this needs to be taken into account for future studies
- …