8,000 research outputs found
The regulation of nightlife and the production of social differentiation: regeneration and licensing in Southview
This thesis attempts to address the reasons why, in the anonymous case study of Southview, a 'night-time economy', based around the consumer demands of a young white popUlation, came to predominate in an area largely defined by its African/Caribbean population and the cultural forms arising from that population. It examines the interrelationship between culture, economy and law. Specifically, this involves examining the interface between the different cultural forms and meanings of nightlife, forms of regeneration initiatives and licensing law and practice in the locality. The research uses an anonymous case study to examine these interrelationships through a combination of ethnographic techniques, semi-structured interviews and documentary
sources.
Chapters One and Two deal with relevant literature, methodology and research design. Then, the research findings are presented in an approximation of a chronological order, whilst examining the key processes involved in the change and transformation of nightlife spaces. Chapter Three explores the way in which historical conflicts defmed and
bound the locality. Chapter Four examines the conflicts emerging from economic development plans and the differing interpretation given by different populations. Chapter Five outlines the conflicts and dynamics involved in the development of the 'night-time economy' in Southview. Chapters Six and Seven explore the issues of subjectivity and differentiation that arise in the formal and informal processes of licensing law and practice. The conclusion attempts to examine the interrelationship between culture, economy and law in explaining both the process of change and the
reproduction of social differentiation.
While the research found that there were no long-term strategic plans to convert nightlife spaces in the area, a conjunction of local institutional subjectivities, practices and legal or regulatory strictures served to re-orientate or 'normalise' local nightlife, and in the process eliminate or exclude some of the key cultural forms of the Afro-Caribbean
population. This involved a number of interrelated processes. First, the evolution of a racialised problematisation of the locality that impacted upon the development and
marginalisation of forms of black entertainment. Second, a combination of regeneration and policing initiatives aimed at normalising and reclaiming unregulated space, although
to different degrees of intent. Third, the application of licensing law and its local interpretation that reproduced and concretised this process of differentiation. Finally, the
impact of the growth of a population of young professionals who were overwhelmingly represented in the new night-time economy and who exhibited specific forms of spatial
consciousness. The interrelationship of such multi-causal processes, it is argued, highlights the importance of complexity in explanation, in that separate elements of the
whole are largely unrelated and unconscious of the other. However, the impact of such processes served to create new social differentials based on an evolving combination of
class and racial exclusion, and in doing so sideline the potential of experimentation and diversity within nightlife spaces
A failure effects simulation of a low authority flight control augmentation system on a UH-1H helicopter
A two-pilot moving base simulator experiment was conducted to assess the effects of servo failures of a flight control system on the transient dynamics of a Bell UH-1H helicopter. The flight control hardware considered was part of the V/STOLAND system built with control authorities of from 20-40%. Servo hardover and oscillatory failures were simulated in each control axis. Measurements were made to determine the adequacy of the failure monitoring system time delay and the servo center and lock time constant, the pilot reaction times, and the altitude and attitude excursions of the helicopter at hover and 60 knots. Safe recoveries were made from all failures under VFR conditions. Pilot reaction times were from 0.5 to 0.75 sec. Reduction of monitor delay times below these values resulted in significantly reduced excursion envelopes. A subsequent flight test was conducted on a UH-1H helicopter with the V/STOLAND system installed. Series servo hardovers were introduced in hover and at 60 knots straight and level. Data from these tests are included for comparison
Kinetics of a frictional granular motor
Within the framework of a Boltzmann-Lorentz equation, we analyze the dynamics
of a granular rotor immersed in a bath of thermalized particles in the presence
of a frictional torque on the axis. In numerical simulations of the equation,
we observe two scaling regimes at low and high bath temperatures. In the large
friction limit, we obtain the exact solution of a model corresponding to
asymptotic behavior of the Boltzmann-Lorentz equation. In the limit of large
rotor mass and small friction, we derive a Fokker-Planck equation for which the
exact solution is also obtained.Comment: 4 pages, 4 Figures, To be published in Phys. Rev. Let
A simple method for estimating minimum autorotative descent rate of single rotor helicopters
Flight test results of minimum autorotative descent rate are compared with calculations based on the minimum power required for steady level flight. Empirical correction factors are derived that account for differences in energy dissipation between these two flight conditions. A method is also presented for estimating the minimum power coefficient for level flight for any helicopter for use in the empirical estimation procedure of autorotative descent rate
Research opportunities in loss of red blood cell mass in space flight
Decreases of red blood cell mass and plasma volume have been observed consistently following manned space flights. Losses of red cell mass by United States astronauts have averaged 10 to 15% (range: 2 to 21%). Based on postflight estimates of total hemoglobin, Soviet cosmonauts engaged in space missions lasting from 1 to 7 months have exhibited somewhat greater losses. Restoration of red cell mass requires from 4 to 6 weeks following return to Earth, regardless of the duration of space flight
Landing approach evaluation of an integrated CRT display for general aviation aircraft
A flight director adaptable to general aviation aircraft was evaluated for the landing approach task in a twin turbojet business aircraft. The flight director combined aircraft heading, pitch and roll atitude, and ILS (Instrument Landing System) signals into a single picture on a small cathode ray tube (CRT) to give the pilot an integrated picture of the aircraft situation. The display is unique in that it presents the information on a CRT and gives quasi-command signals to the pilot. The particular display investigated was a preproduction version of the Kaiser Model FP-50 flight director. Approaches made with visual references only, with a conventional ILS displacement instrument, and with the CRT display were compared in terms of tracking performance and pilot workload. Tracking performance of three research pilots using the CRT display was superior to that using the conventional ILS instrument and comparable to that under VFR conditions. Pilot workload (based on pilot comments) was not clearly decreased
Electric fishing survey of the gravel addition sites on the River Wyre, Grizedale Beck and Joshua's Beck.
Although geographically the River Wyre lies between two rivers containing major migrations of adult salmon and sea trout, its rod & line fisheries have for a number of years produced exceptionally low catches. In order to determine the causes of this the Wyre Salmon and Sea trout Restoration Group (WSSRG) was conceived in 1994 as a partnership between the then National Rivers Authority (now Environment Agency), local landowners, angling clubs and interested parties.
Two studies of 1994 and 1995 stated that there is a shortage of useable spawning gravels on the river. This is
compounded by Abbeystead Reservoir acting as a gravel trap, the siltation of gravels on several side becks and problems with access to available gravels by returning adults. There
was also perceived to be a need for accurate fishery data from the river encompassing redd counts, catch data and surveys of fry populations.
The 1995 report suggested a number of management proposals which might be adopted in order to improve and create available spawning habitat for migratory salmonids. Funding was made available to create three spawning gravels on each of two side becks (Grizedale Beck and Joshua's Beck) and the addition of gravels to a site oh the main river below Abbeystead Reservoir. Modifications were also made to the fish pass at Abbeystead to allow easier passage of fish. These improvements were made in the autumn of 1995. Salmonid spawning redd counting was undertaken on the whole Wyre catchment in 1995/1996 and specific surveys by electric fishing on the gravel enhancement sites in the summer of 1996.
This report details the current state of the improvement works that were undertaken and presents the results of electric fishing surveys in September 1996. A number of lessons have been learnt which will be of great benefit to the Fisheries Function in other parts of the Wyre catchment and the Central Area in general
Recommendations for high intensity upper body exercise testing
Introduction: For given submaximal and maximal peak power outputs aerobic responses to upper body exercise are different to those for lower body exercise (Sawka, 1986: Exercise & Sport Sciences Reviews, 14, 175-211). However, much less is known regarding responses to exercise intensities at and around peak oxygen up take (VO2peak). Purpose: The purpose of this study was to determine the metabolic responses during arm crank ergometry (ACE) below, at and above peak oxygen uptake and to help establish exercise testing guidelines for high intensity upper body exercise. Methods: Following institutional ethical approval fourteen male students (Age 21.1, s = 6.1 years and 2.44 s=0.44 VO2peak) volunteered to take part in this study. Each participant exercised on a table mounted cycle ergometer (Monark 894E, Monark Exercise AB, Sweden). After habituation peak minute power (PMP) was calculated from an incremental test. Subsequently each participant completed four continuous work tests (CWT) to volitional exhaustion at 80%, 90%, 100% and 110% of PMP. All tests were completed at 70 rev∙min-1 with a minimum of 48-h between tests and the order was counterbalanced. Each CWT was preceded by a 5 min warm-up, loaded with a mass corresponding to the participants 80% PMP for 20 s at minutes 2, 3 and 4. Oxygen uptake (VO2), respiratory exchange ratio (RER), heart rate (HR) and ratings of perceived exertion for the arms (local (RPEL) and cardiorespiratory strain (RPECR) were recorded at 1 min, 2 min and at volitional exhaustion. The EMG responses at three sites (flexor carpi ulnaris, biceps brachii and triceps brachii lateral) were recorded using double-differential (16-3000 Hz bandwidth, x300 gain), bipolar, active electrodes (MP-2A, Linton, Norfolk, UK). Electromyographic data were sampled at 1000 Hz and filtered using a 20 to 500 Hz band-pass filter (MP150 Data Acquisition and AcqKnowledge 4.0, Biopac, Goleta, CA). The EMG signals for each muscle were root mean squared (RMS) with a 500-ms sample window. The signal was then normalised, prior to each CWT, as a percentage of the mean of 3 sets of 10 duty cycles completed during the warm-up (see above) when the participants 80% PMP for 20 s was applied. Time to exhaustion (Tlim) was recorded as the performance outcome measure. Data for Tlim were analysed using one-way analysis of variance. Differences in EMG, VO2, RER, HR, RPEL and RPECR were analysed using separate two-way analysis of variance with repeated measures (trial x time). All analyses were performed using the Statistical Package for Social Sciences ( 17.0; SPSS Inc., Chicago, IL). Individual differences in means were located using Bonferroni post-hoc correction. Significance was accepted at P < 0.05. Results: As resistive load increased Tlim decreased (611 s=194, 397 s=99, 268 s=90, 206 s=67s, respectively; P < 0.001, ES = 0.625). Post-hoc analysis revealed that Tlim using 80%PMP was longer than for 90%, 100% and 110% PMP trials (P < 0.001) and 90% was longer than both 100% and 110% PMP trials (P = 0.079, P = 0.001). At exhaustion VO2 was similar across trials (P = 0.413, ES = 0.053), although 80% PMP VO2 tended to be less (2.10 s=0.32 l·min-1) than for 90% (2.29 s=0.37), 100% (2.33 s=0.49) and 110% (2.26 s=0.34). Also, 80% PMP VO2 was less than VO2peak (P = 0.013). There were differences in RER at Tlim (P < 0.001, ES = 0.593) with values increasing with % PMP (1.15 s=0.07, 1.26 s=0.07, 1.36 s=0.10, 1.40 s=0.09, respectively). There were no differences across trials for HR at Tlim (~173 (12); P = 0.834, ES = 0.016) and HR was proportional to %PMP at 1 min, and 2 min. For flexor carpi ulnaris there was an increase in activation as exercise intensity increased (P < 0.001, ES = 0.245). There were a similar responses for biceps brachii and triceps brachii demonstrating an increase in activation with exercise intensity (P <0.001, ES = 0.137, P < 0.001, ES = 0.163, respectively). No differences for RPEL and RPECR were observed at Tlim. Discussion: There was a clear response of Tlim with intensity as expected for lower body exercise (Hill et al., 2002: Medicine and Science in Sports and Exercise, 34(4), 709-714). Despite differences in Tlim across exercise intensities VO2, HR and RPE were similar at exhaustion indicating a functional cardiorespiratory maximum had been reached. As indicated by the RER an increased activation of the anaerobic metabolism with greater exercise intensities (100% and 110%) is likely and therefore this may represent a greater anaerobic component at these two intensities. The increase in EMG activity with intensity could indicate an increase activity with an increase in exercise intensity. Conclusion: It is recommended that due to the combination of muscle activation, oxygen uptake and Tlim that an exercise intensity of 90% or 100% of PMP could be used for high intensity upper body exercise testing
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