Helicopter rotor noise, part 2 Final report, 1 Dec. 1965 - 30 Nov. 1968

Experimental study of helicopter rotor nois

Helicopter noise: Blade slap. Part 2: Experimental results

Blade slap encountered in rotary wings and its effect on helicopter performance are reported. The results of various individual flight tests are presented and, where possible, correlated with one another. Observations from the subjective evaluation of blade slap are included, together with a modified form of the blade slap factor (BSF) which can be used as a design criteria

The influence of the noise environment on crew communications

The noise environment and how it affects crew communications in helicopters is considered. The signal to noise (S/N) ratio at the microphone and the effect of the attenuation provided by the helmet is discussed. This shows that the most important aspect is the S/N ratio at the microphone, particularly when helmets with improved attenuation characteristics are considered. Evidence is presented which shows that in high noise environments, the system S/N ratio is well below that required and hence there is an urgent need to reduce the cabin noise levels and improve the microphone rejection properties. Emphasis is placed on environmental/acoustic considerations

Giving patients choices during involuntary admission : a new intervention

Background: People who receive involuntary treatment are some of the most vulnerable in psychiatric services. They are more likely to have poorer social and clinical outcomes and to be disillusioned with and disengaged from care. Research indicates that patients’ experience in the first week of involuntary treatment is a critical period: a better experience of care in the first week predicts better quality of life and reduced readmission 1 year later. Patients have identified involvement in clinical decisions as key to improving their experience of care. The aim of this study was to test the feasibility and acceptability of an intervention to facilitate involvement in decision making for involuntary inpatients called OPeNS (Options, Preferences, Negotiate, and Summarise). Methods: This was a mixed method study. The OPeNS intervention was developed based on previous research carried out by a multidisciplinary team. Clinicians were trained to deliver it to involuntary inpatients. Feasibility indices (rates of participation in the intervention and time required to deliver it) were collected. Patients (N = 14) and clinicians (N = 5) provided qualitative data on their experience of the intervention in semi-structured interviews which were analysed using thematic analysis. Results: The OPeNS intervention was found to be acceptable by both patients and clinicians and feasible to conduct within the first week of involuntary treatment. Patients’ and clinicians’ experiences of the intervention fall into two themes: ‘Enabling a different dynamic’ and ‘Clashing with usual practices and priorities’. Conclusion: The OPeNS intervention provides a structure that can be used by clinicians across disciplines to facilitate involving involuntary patients in decision making. Although challenges related to changing usual practices were identified, the intervention was received positively and was feasible to conduct in the first week of involuntary treatment

Helicopter noise - A blade slap. Part 1 - Review and theoretical study

Review of blade slap studies for determining noise in helicopter

Bubble Mania

Through my research design, I will derive a trend of the average price of the S&P 500 for the past 100 years. This trend will be a representation of the fundamental valuation of the stock market. Previous studies suggest the S&P 500 should trend upward at 6-7% per year (Lynch 1989). Then, I analyze the deviation from this trend during the mid-1980s bubble and the technology bubble of the late 1990s. I run a regression using consumer confidence and sentiment indices. My modified hypothesis is that the deviation of actual S&P 500 prices from predicted “fundamental” S&P 500 prices during the years 1985- 2001 is started by changes in consumer confidence and consumer sentiment. If the variables explain a lot of the deviation, then the herd mentality theory predicts the creation and destruction of bubbles

Rating helicopter noise

The effectiveness of the EPNL procedure in quantifying helicopter blade slap and tail rotor noise heard on approach some distance from the flyover position is addressed. Alternative methods of rating helicopter noise are reviewed including correction procedures to the EPNL concept which account for blade slap and tail rotor noise. The impact of the use of such corrections is examined

Bubble Mania or Not?

While many economists define a bubble as a deviation from stock market fundamentals, Charles Kindleberger defines a bubble as an upward price movement over an extended range that tends to implode (Kindleberger 1996). An extended negative bubble is a crash. The nature of these beasts makes them very important to the investor. Business schools teach students about the efficient market hypothesis and the economically rational individual. Bubbles make investing difficult because prices deviate from their fundamental valuations. If market fundamentals can not predict prices, the investor is forced to learn new ways of investing

Acute Alcohol Consumption and Secondary Psychopathic Traits Increase Ratings of the Attractiveness and Health of Ethnic Ingroup Faces but Not Outgroup Faces

Studies have consistently shown that both consumption of acute amounts of alcohol and elevated antisocial psychopathic traits are associated with an impaired ability for prepotent response inhibition. This may manifest as a reduced ability to inhibit prepotent race biased responses. Here, we tested the effects of acute alcohol consumption, and elevated antisocial psychopathic traits, on judgments of the attractiveness and health of ethnic ingroup and outgroup faces. In the first study, we show that following acute alcohol consumption, at a dose that is sufficient to result in impaired performance on tests of executive function, Caucasian participants judged White faces to be more attractive and healthier compared to when sober. However, this effect did not extend to Black faces. A similar effect was found in a second study involving sober Caucasian participants where secondary psychopathic traits were related to an intergroup bias in the ratings of attractiveness for White versus Black faces. These results are discussed in terms of a model which postulates that poor prefrontal functioning leads to increases in ingroup liking as a result of impaired abilities for prepotent response inhibition.</p