scholarly journals MODELLING INFILTRATION ON GRAVEL BEACHES WITH AN XBEACH VARIANT

2011 ◽  
Vol 1 (32) ◽  
pp. 41 ◽  
Author(s):  
Mohamad Hidayat Jamal ◽  
David J. Simmonds ◽  
Vanesa Magar ◽  
Shunqi Pan
Keyword(s):  
Sandy Beaches ◽  
Coarse Grained ◽  
Waves And Currents ◽  
Profile Changes ◽  
The Subject ◽  
Gravel Beaches ◽  
Sediment Transport Equation ◽  
The Uk ◽  
Sand And Gravel

Coarse-grained beaches are particularly prevalent in the UK, composed of accumulations of either gravel, or mixed sand and gravel sediments. Understanding and predicting their morphological behaviour in response to short-term and long-term forcing has been the subject of recent research. Despite the focus on sandy beaches, it is important to understand that the balance of processes that govern different behaviour between sandy and gravel beaches. In this study we show how a public domain numerical model, XBeach, developed for sandy environments (Roelvink et al., 2009) can be modified for use in predicting the cross-shore profile changes of gravel beaches. Improvements investigated here include: use of Lagrangian interpretation of velocity in place of Eulerian for driving sediment movement; incorporation of Packwood’s (1983) pragmatic model of infiltration in the unsaturated area of the swash region; introducing of new morphological module based upon Soulsby’s (1997) sediment transport equation for waves and currents. These changes are suggested in order to significantly improve the application of this model to gravel beaches, especially with regard to swash velocity asymmetry which is responsible for development of the steep accretionary phase steep berm above waterline. The results from the model agree well with the measured experimental data and improve upon the results presented by Pedrozo-Acuña et al. (2006).

scholarly journals Mathematical Framework for Breathing Chimera States

2022 ◽  
Vol 32 (2) ◽  
Author(s):  
O. E. Omel’chenko
Keyword(s):  
Coupled Oscillators ◽  
Analytic Solution ◽  
Coarse Grained ◽  
Mathematical Framework ◽  
Intensive Study ◽  
Phase Oscillators ◽  
Chimera States ◽  
The Subject ◽  
Self Consistency

AbstractAbout two decades ago it was discovered that systems of nonlocally coupled oscillators can exhibit unusual symmetry-breaking patterns composed of coherent and incoherent regions. Since then such patterns, called chimera states, have been the subject of intensive study but mostly in the stationary case when the coarse-grained system dynamics remains unchanged over time. Nonstationary coherence–incoherence patterns, in particular periodically breathing chimera states, were also reported, however not investigated systematically because of their complexity. In this paper we suggest a semi-analytic solution to the above problem providing a mathematical framework for the analysis of breathing chimera states in a ring of nonlocally coupled phase oscillators. Our approach relies on the consideration of an integro-differential equation describing the long-term coarse-grained dynamics of the oscillator system. For this equation we specify a class of solutions relevant to breathing chimera states. We derive a self-consistency equation for these solutions and carry out their stability analysis. We show that our approach correctly predicts macroscopic features of breathing chimera states. Moreover, we point out its potential application to other models which can be studied using the Ott–Antonsen reduction technique.

Entrepreneurship: predictive profiling a game changer

2014 ◽  
Vol 30 (2) ◽  
pp. 1-4 ◽  
Author(s):  
Simon Middleton
Keyword(s):  
Developed Countries ◽  
Wealth Creation ◽  
Content Type ◽  
Emerging Nations ◽  
Management Positions ◽  
Profiling Techniques ◽  
The Subject ◽  
The Uk ◽  
Distinct Field

Purpose – Addresses the subject of the entrepreneur, describes the significant and growing number of small and medium-sized enterprises in the UK, and outlines the author's development of an entrepreneurial competency profile (ECP). Design/methodology/approach – Draws on statistics taken form the UK government-sponsored Young Report, Make Business Your Business, and the author's own research into entrepreneurial efficacy. Findings – Describes how governments in developed countries and those in emerging nations are driving to create an environment that nurtures and sustains entrepreneurship. They believe it can rapidly create jobs, improve GDP and increase long-term productivity. Practical implications – Will benefit those in senior management positions by discussing the use of predictive profiling techniques to facilitate wealth creation. Originality/value – With so much attention being paid to entrepreneurship, and given our knowledge of predictive behavioral economics, can it be justifiably classified as a relatively distinct field in organizational sciences? Whilst there are many notable entrepreneurial successes, there are equally a large number of failures. How can we mitigate the failure rate?

Impacts of the Exxon Valdez Spill and Subsequent Cleanup on Intertidal Biota—1 Year Later

1991 ◽  
Vol 1991 (1) ◽  
pp. 467-475 ◽  
Author(s):  
Jonathan P. Houghton ◽  
Dennis C. Lees ◽  
William B. Driskell ◽  
Alan J. Mearns
Keyword(s):  
Random Sampling ◽  
Hot Water ◽  
Short Term ◽  
Exxon Valdez ◽  
Field Surveys ◽  
Upper Intertidal ◽  
Gravel Beaches ◽  
Sand And Gravel ◽  
Littoral Habitats

ABSTRACT A substantial amount of the crude oil which spilled from the tanker Exxon Valdez on March 24, 1989, was deposited on beaches in Prince William Sound. Major beach cleanup activities began in May and continued throughout the summer of 1989. Additional cleanup activities occurred during the summer of 1990. A study was conducted in 1989 to document the short-term impact to biota of hot water wash treatments. Additional field surveys were conducted in the summer of 1990 to evaluate recovery of littoral habitats from the effects of oiling and shoreline treatment. Stratified-random sampling was used to assess epibiota and infauna at 27 sites, representing several habitats and degrees of disturbance. Preliminary data evaluations indicate that treatment methodologies applied in 1989 had varied effects on intertidal assemblages. Some treated rocky beaches were stripped of flora and fauna at mid- and upper intertidal elevations and showed relatively little colonization by mid summer 1990. On other oiled rocky beaches that received less severe or no treatment, the majority of the community dominants remained in place and significant recolonization was underway. Protected sand and gravel beaches subjected to hydraulic treatments displayed greatly altered beach morphology. Finer sands and gravels were flushed from upper intertidal elevations, often burying the lower beach in several centimeters of sediment, resulting in major reductions in infauna in 1990. Oiled but untreated sand and gravel beaches had a rich and varied infauna. The effects of 1989 shoreline treatment activities on intertidal flora and fauna were significant and widespread and will greatly complicate assessment of the long-term impacts of the oil itself.

scholarly journals Killers in the bush

2002 ◽  
Vol 25 (2) ◽  
pp. 16
Author(s):  
Mike Pollard
Keyword(s):  
Rural Health ◽  
Extreme Environments ◽  
South Australia ◽  
Aboriginal Health ◽  
Political Debate ◽  
Chief Executives ◽  
Health Practitioners ◽  
The Subject ◽  
The Uk

Three senior Chief Executives of acute hospital trusts in the UK recently visited the Northern Territory (NT)and South Australia (SA) to study remote and rural health care in general - and Aboriginal health in particular. As with all other aspects of Aboriginal life, the subject of health status is highly charged and generates heightened emotions and intense political debate across the country but particularly in the NT and SA where many of the remote indigenous people live. Every "mainstream" Australian has an opinion on the trials and tribulations of the indigenous people.The field study was part of the NHS Leadership Centre's Senior Chief Executives' Development Programme. Itcomprised a longitudinal journey across the continent from Darwin (NT) through to Alice Springs to Tanundain the Barossa Valley and then on to Adelaide following the route of the 2,500 kilometre Stuart Highway. Itinvolved visiting rural health services, and meetings with Aboriginal leaders, academics, health practitioners and senior officials of the SA government.A specific research topic was to understand how practitioners working in extreme environments, and delivering long-term programmes of care, can maintain their morale and motivation.

scholarly journals Career choices for psychiatry: national surveys of graduates of 1974–2000 from UK medical schools

2005 ◽  
Vol 186 (2) ◽  
pp. 158-164 ◽  
Author(s):  
Michael J. Goldacre ◽  
Gill Turner ◽  
Seena Fazel ◽  
Trevor Lambert
Keyword(s):  
Career Choices ◽  
Medical Schools ◽  
Postal Questionnaire ◽  
Junior Doctors ◽  
The Subject ◽  
Questionnaire Surveys ◽  
The Uk ◽  
Personal Assessment ◽  
Conditions Of Work

BackgroundConcerns continue about recruitment levels of junior doctors into psychiatry in the UK.AimsTo report career choices for and career progression in psychiatry.MethodPostal questionnaire surveys of qualifiers from all UK medical schools in eight qualification years since 1974.ResultsTotals of 75% (21 845 out of 28 980) and 74% (17 741 out of 24 044) of doctors responded atone and three years after qualification. One and three years after qualification, 4–5% of doctors chose psychiatry This has changed very little between 1974 and 2000. Most doctors who chose psychiatry one and three years after qualification were working in psychiatry at year 10. Hours and conditions of work, the doctor's personal assessment of their aptitudes and skills and their experience of the subject as a student influenced long-term career choices for psychiatry.ConclusionsGreater exposure to psychiatry for clinical students and in junior hospital jobs might improve recruitment.

Using the Change4Life Disney Branded 10-minute Shake Ups During the COVID-19 ‘Lockdown’

2020 ◽  
Author(s):  
Emily Budzynski-Seymour ◽  
James Steele ◽  
Michelle Jones
Keyword(s):  
Perceived Exertion ◽  
Affective Responses ◽  
Online Resources ◽  
Future Research ◽  
Affective States ◽  
Perceived Effort ◽  
Qualitative Feedback ◽  
Bidirectional Relationship ◽  
The Uk

Physical activity (PA) is considered essential to overall health yet it is consistently reported that children are failing to meet the recommended levels. Due to the bidirectional relationship between affective states and PA, affective responses are a potential predictor to long term engagement. Since late March 2020 the UK government enforced ‘lockdown’ measures to help control the spread of Coronavirus (COVID-19); however, this has impacted children’s PA. Using online resources at home to support PA is now common. The primary aim of this research was to investigate the use of the Change4Life 10-minute Shake Ups to support PA by examining the effects of Disney branding upon children’s (n=32) post activity affective responses and perceived exertion. The secondary was to investigate the effect of the lockdown on PA habits. Children had similar positive affective responses and perceived effort to activities; however, branding was considered to be a key contributing factor based upon qualitative feedback from parents. Children’s PA levels dropped slightly since ‘lockdown’ was imposed; though online resources have been utilised to support PA. The use of immersive elements such as characters and narrative in PA sessions, as well as utilising online resources during ‘lockdown’ appear potentially promising for future research.

GA: Armani’s Giorgio Armani

2018 ◽  
Author(s):  
Paul Brooker ◽  
Margaret Hayward
Keyword(s):  
Final Section ◽  
The Body ◽  
Body Shop ◽  
The Third ◽  
Haute Couture ◽  
Fashion Designer ◽  
The Body Shop ◽  
The Uk ◽  
Career Woman

The Armani high-fashion example illustrates the importance of adaptive rational methods in his founding and developing of an iconic high-fashion firm. Armani adapted stylistically to fashion’s new times in the 1970–80s by creating a new style catering for the career woman. His stylistic adaptation is compared with that of another famous Italian fashion designer, Versace, who instead modernized haute couture fashion and created a succession of glamourous styles. Both leaders exploited the same opportunity but in different ways. The third section compares these leaders’ legacies in the 1990s–2000s and assesses from a long-term perspective how capably they had used adaptive rational methods. The final section shifts the focus from fashion to the cosmetics industry and from Italy to the UK. Anita Roddick used adaptive rational methods to establish The Body Shop corporation in the 1970s–80s. However, she then abandoned rational methods with dire results for her corporation in the 1990s.

scholarly journals Knowledge and attitudes towards concussion in UK-based male ice hockey players: A need for attitude change?

2019 ◽  
Vol 14 (2) ◽  
pp. 153-161 ◽  
Author(s):  
Sarah Hutchinson ◽  
Paul Ellison ◽  
Andrew Levy ◽  
David Marchant
Keyword(s):  
Attitude Change ◽  
Ice Hockey ◽  
Knowledge And Attitudes ◽  
Accurate Knowledge ◽  
Hockey Players ◽  
Sport Concussion ◽  
Concussion History ◽  
Concussion Knowledge ◽  
The Uk

Objective Concussion is a common injury in ice hockey, and previous research suggests some misconceptions and unsafe attitudes amongst players. The purpose of this study was to assess sport concussion knowledge, attitudes and the effect of sport concussion history in UK-based male ice hockey players across three levels of competition: professional, semi-professional and amateur. Methods Sixty-one participants across a number of UK ice hockey teams completed the Rosenbaum Concussion Knowledge and Attitudes Survey and reviewed a series of statements to assess knowledge (concussion knowledge index), attitudes (concussion attitude index) and misconceptions of concussion. Results Level of competition and concussion history had no significant effect on concussion knowledge index or concussion attitude index. A positive significant relationship exists between playing experience and concussion knowledge index and concussion attitude index. Statements identified common misconceptions and areas of accurate knowledge regarding concussion symptoms suggesting that male ice hockey players have a higher level knowledge compared to a sample of the UK general public. Playing experience was associated with increased knowledge and increasingly safe attitudes towards concussion. Conclusion Despite knowledge relating to loss of consciousness and correct management of symptoms being generally accurate, there are worryingly unsafe attitudes regarding aspects of concussion. Such attitudes may well pose significant threats to players’ safety and long-term health.

Sign in / Sign up

Export Citation Format

Share Document