10,128 research outputs found
Effect of plasma inhomogeneity on plasma wakefield acceleration driven by long bunches
Effects of plasma inhomogeneity on self-modulating proton bunches and
accelerated electrons were studied numerically. The main effect is the change
of the wakefield wavelength which results in phase shifts and loss of
accelerated particles. This effect imposes severe constraints on density
uniformity in plasma wakefield accelerators driven by long particle bunches.
The transverse two stream instability that transforms the long bunch into a
train of micro-bunches is less sensitive to density inhomogeneity than are the
accelerated particles. The bunch freely passes through increased density
regions and interacts with reduced density regions.Comment: 7 pages, 10 figure
Ethics, occupational therapy and discharge planning: four broken principles
Occupational therapists play a significant role in the discharge process and are often exposed to ethically challenging decision-making. This paper examines the moral basis of discharge planning, relating it to the four fundamental bio-ethical principles of respect for autonomy, beneficence, non-maleficence and justice. Using a case study design, data was collected from 10 occupational therapists and two elder care patients using the critical incident approach, as part of a wider study to determine their perceptions of discharge planning and multidisciplinary teamwork. Direct observation of interaction within multidisciplinary teams was also undertaken. The findings from the research suggest that occupational therapists are unintentionally breaching these four principles and therefore their code of ethics and professional conduct. It is suggested that further research is needed to determine how occupational therapists overcome these challenges. Furthermore, this research has important implications for education establishments regarding the teaching of ethics to occupational therapists
Do all health and social care professionals interact equally: A study of interactions in multidisciplinary teams in the United Kingdom.
Problems around deficits in interprofessional collaboration have been identified since the National Health Service (NHS) was introduced. It is within the context of the current policy focus on improving collaborative working that this study was undertaken. A direct observational study using the Balesâ Interaction Process Analysis tool was carried out in two older persons teams to explore patterns of interaction in the multidisciplinary team meetings. Analysis revealed some key differences in the way in which different professions interacted. Occupational therapists, physiotherapists, social workers (SW) and nurses rarely asked for opinions and for orientation. The consultant (the individual in charge of the medical team) tended to have high rates for asking for orientation, giving opinions and giving orientation. Although some nurses did have high individual rates for the giving of orientation. The data from the research has highlighted that therapists, SWs and nurses are reluctance to voice their opinions in multidisciplinary teams and thus conformity may dominate its culture. It is suggested that therapists, SWs and nurses need to cite their opinions in teams more effectively if they are to be competent and committed patient-centred practitioners
Spectral Variations in Early-Type Galaxies as a Function of Mass
We report on the strengths of three spectral indicators - Mg_2, Hbeta, and
Hn/Fe - in the integrated light of a sample of 100 field and cluster E/S0
galaxies. The measured indices are sensitive to age and/or and metallicity
variations within the galaxy sample. Using linear regression analysis for data
with non-uniform errors, we determine the intrinsic scatter present among the
spectral indices of our galaxy sample as a function of internal velocity
dispersion. Our analysis indicates that there is significantly more intrinsic
scatter in the two Balmer line indices than in the Mg_2 index, indicating that
the Balmer indices provide more dynamic range in determining the age of a
stellar population than does the Mg_2 index. Furthermore, the scatter is much
larger for the low velocity dispersion galaxies, indicating that star formation
has occurred more recently in the lower mass galaxies.Comment: 4 pages, 1 figure, 1 table, to appear in the Astrophysical Journal
Letter
Plasma Wakefield Acceleration with a Modulated Proton Bunch
The plasma wakefield amplitudes which could be achieved via the modulation of
a long proton bunch are investigated. We find that in the limit of long bunches
compared to the plasma wavelength, the strength of the accelerating fields is
directly proportional to the number of particles in the drive bunch and
inversely proportional to the square of the transverse bunch size. The scaling
laws were tested and verified in detailed simulations using parameters of
existing proton accelerators, and large electric fields were achieved, reaching
1 GV/m for LHC bunches. Energy gains for test electrons beyond 6 TeV were found
in this case.Comment: 9 pages, 7 figure
Multidisciplinary perspectives on the role of nurses and health care assistants in the rehabilitation of older adults.
Aim. This paper describes the perceptions of nurses, healthcare assistants, doctors and therapists of rehabilitation and the role of nurses and healthcare assistants on an acute older adults ward in a London teaching hospital.
Background. The role perception, education and training and attitudes towards the older adults have been identified as barriers that have an impact upon the nursesâ role within rehabilitation. However, little is known about the role of nurses and healthcare assistants in rehabilitation of older adults in acute health care.
Design. Action research study.
Method. Twenty-four semi-structured interviews were conducted and audio recorded about healthcare professionalsâ understanding of rehabilitation, the type of skills needed and their perceptions of the role of nurses and healthcare assistants in rehabilitation. The interview transcripts were analysed using the thematic content analysis.
Results. The findings suggest that the therapists relied on nurses and healthcare assistants for therapy carry-over. Healthcare assistants were perceived as the professional group who could deliver therapy carry-over. There was an evidence of role hierarchy as healthcare assistants perceived that they were not actively involved in decision-making or discharge planning.
Conclusion. This paper suggests that healthcare assistants and nurses are viewed as the professional group best placed to deliver therapy carry-over. However, whilst there is an acknowledgement of their role, there remains a reluctance to acknowledge healthcare assistants as a professional group and to involve them within decision-making and discharge planning
Relevance to clinical practice. Employers must be seen to advocate, support and implement education and training programs for healthcare assistants. However, whilst nurses and healthcare assistants have an integral role in rehabilitation, there needs to be more research into the how they are supported by therapy professionals
The luminosity function of Palomar 5 and its tidal tails
We present the main sequence luminosity function of the tidally disrupted
globular cluster Palomar 5 and its tidal tails. For this work we analyzed
imaging data obtained with the Wide Field Camera at the INT (La Palma) and data
from the Wide Field Imager at the MPG/ESO 2.2 m telescope at La Silla down to a
limiting magnitude of approximately 24.5 mag in B. Our results indicate that
preferentially fainter stars were removed from the cluster so that the LF of
the cluster's main body exhibits a significant degree of flattening compared to
other GCs. This is attributed to its advanced dynamical evolution. The LF of
the tails is, in turn, enhanced with faint, low-mass stars, which we interpret
as a consequence of mass segregation in the cluster.Comment: 4 pages, 3 figures, to be published in the proceedings of the
conference "Satellites and tidal streams" held at La Palma, Canary Islands,
May 26 - 30, 200
Identification of photons in double beta-decay experiments using segmented germanium detectors - studies with a GERDA Phase II prototype detector
The sensitivity of experiments searching for neutrinoless double beta-decay
of germanium was so far limited by the background induced by external
gamma-radiation. Segmented germanium detectors can be used to identify photons
and thus reduce this background component.
The GERmanium Detector Array, GERDA, will use highly segmented germanium
detectors in its second phase. The identification of photonic events is
investigated using a prototype detector. The results are compared with Monte
Carlo data.Comment: 20 pages, 7 figures, to be submitted to NIM-
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Home accidents amongst elderly people: A locality study in Scotland
Aim
The aim of this locality study was to collect information on reported and unreported accidents amongst elderly people living in one locality in Scotland.
Method
Postal Survey- A postal questionnaire was sent to 3,757 men and women aged 65+ years living in one locality. The questionnaire asked respondents to indicate how many accidents they had experienced in the past twelve months, plus to indicate type and location. Information was gathered on living arrangements, ethnicity, gender, age and deprivation. Respondents were asked if they would be willing to take part in an interview study.
Interview Study - One hundred elders who had had at least one accident in the previous twelve months were interviewed.
Results
Postal Survey - Over a third of the respondents in the postal survey reported having had an accident in the previous twelve months. Bumps and drops and falls were the most common type of accident. Most accidents happened in the kitchen. Women reported more falls than men and those living alone reported more accidents than those living with others. Age was associated with the prevalence of accidents, but the association was somewhat curvilinear, with accidents decreasing with age and then increasing again.
Interview Study â Interviewees found it hard to differentiate one accident from another. Considerable reluctance to visit the GP after an accident was noted, with many not attending even for serious accidents. Almost forty percent were âveryâ distressed after their accident, and a quarter reported a loss of confidence. However, most did not worry about accidents. Few thought that their age, health or medications were a cause of their accidents
Telegram, Wesley A. Caldwell, Chairman of the Board of Mississippi Steel Corporation, to Mississippi State University President Dean W. Colvard, March 5, 1963
Wesley A. Caldwell, Chairman of the Board of Mississippi Steel Corporation, writes to MSU President Dean W. Colvard, to express his opposition to MSU playing Loyola Chicago, a team with Black players, in the NCAA tournament. Caldwell says that Mississippi Steel Corp. would be discontinuing their contributions to the MSU foundation. There is a handwritten note at the bottom of the telegram from Class of 1951 graduate H.K. Davis, a Mississippi Steel Corp. stockholder, who explains that he is in support of Caldwell\u27s actions.https://scholarsjunction.msstate.edu/ua-msu-loyola-1963/1029/thumbnail.jp
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