A review of aerodynamic noise from propellers, rotors, and lift fans

Hand calculation procedures for predicting aerodynamic noise from propellers, rotors, and lift fan

Ravine

In lieu of an abstract, below is the essay\u27s first paragraph. Starting in Utica, High Point Trail winds down thirteen miles and intersects with County Road #27. There are curves, hills and dark, green mountains and Theodore Dunday knew he should keep his new Mustang GT around forty, but mental temperament has quite a bit to do with driving style and he was simply not in the mood to keep it under the limit; Dunday pulled on his lights as the Mustang jumped up over fifty. It had been a long day and he wanted to get home

Sorry is harder to say when you mean it : clinicians\u27 perceptions of working with juvenile sexual offenders on taking responsibility for their offenses

This qualitative empirical study explores the perceptions of clinicians helping juvenile sexual offenders take responsibility for their offenses and how it enhances treatment outcomes. Twelve clinicians from a single, residential treatment program for male juvenile sexual offenders, ages 5-20, located in Northeastern United States, were interviewed and asked a series of questions about how they work with juvenile sexual offenders to take responsibility for the sexual offenses. Interview questions addressed a variety of issues relating to taking responsibility, including the influence of developmental and trauma histories, the disclosure process in different settings such as individual, group and family therapy, assessing progress in treatment (and in the milieu), effective clinical interventions and the influence of sociocultural factors such as sexual orientation and socioeconomic status. The major findings were descriptions, amongst interviewees, of common approaches and experiences in working with juvenile sexual offenders around taking responsibility for his offenses. Interviewees described the importance of the disclosure experience, particularly to a student\u27s family and underscored the similarities between thinking and behavior patterns that led to the sexual offending and other problematic, but non-sexual behaviors. Interviewees acknowledged the treatment benefits of a long-term residential program for this population, such as being able to work with the whole child to address the complexities that led to the sexual offending and support meaningful, lasting change. Future research might investigate the clinical benefits of milieu treatment with this population

Radial Velocity Variations in Pulsating Ap Stars III. The Discovery of 16.21 min Oscillations in Beta CrB

We present the analysis of 3 hrs of a rapid time series of precise stellar radial velocity (RV) measurements (sigma = 4.5 m/s) of the cool Ap star Beta CrB. The integrated RV measurements spanning the wavelength interval 5000-6000 Ang. show significant variations (false alarm probability = 10^-5) with a period of 16.21 min (nu = 1028.17 micro Hz) and an amplitude of 3.54 +/- 0.56 m/s. The RV measured over a much narrower wavelength interval reveals one spectral feature at 6272 Ang. pulsating with the same 16.21 min period and an amplitude of 138 +/- 23 m/s. These observations establish Beta CrB to be a low-amplitude rapidly oscillating Ap star.Comment: 5 Pages, 5 figure

Molecular beam epitaxial growth of high-quality InSb on InP and GaAs substrates

Epitaxial layers of InSb were grown on InP and GaAs substrates by molecular beam epitaxy. The dependence of the epilayer quality on flux ratio, J sub Sb4/J sub In, was studied. Deviation from an optimum value of J sub Sb4/J sub In (approx. 2) during growth led to deterioration in the surface morphology and the electrical and crystalline qualities of the films. Room temperature electron mobilities as high as 70,000 and 53,000 sq cm /V-s were measured in InSb layers grown on InP and GaAs substrates, respectively. Unlike the previous results, the conductivity in these films is n-type even at T = 13 K, and no degradation of the electron mobility due to the high density of dislocations was observed. The measured electron mobilities (and carrier concentrations) at 77 K in InSb layers grown on InP and GaAs substrates are 110,000 sq cm/V-s (3 x 10(15) cm(-3)) and 55,000 sq cm/V-s (4.95 x 10(15) cm(-3)), respectively, suggesting their application to electronic devices at cryogenic temperatures