6,014 research outputs found
Program Design Snapshot: State Buy-In Programs for Children
Outlines the features, impact, and possible limitations of programs that allow moderate-income families without access to affordable private health insurance to buy public coverage for their children. Includes suggestions for increasing enrollment
California's Express Enrollment Program
Evaluates a pilot project that was implemented in ten school districts to test the effectiveness of a program that provides public health coverage to uninsured children by enrolling them through school lunch programs
To explore how coaches experience the challenge of developing their own professional practice
"There is nothing more difficult to take in hand, more perilous to conduct or more uncertain in its success than to take the lead in the introduction of a new order of things. Because the innovator has for enemies all those who have done well under the old conditions and lukewarm defenders in those who may do well under the new. This coolness arises partly from fear of the opponents, who have the laws on their side, and partly from the incredulity of men, who do not readily believe
in new things until they have had a long experience of them." Nicolo Machiavelli, 1515¹
Coaching is not new, although over the past decade its popularity has been fuelled by organisational trends which have demanded that leaders learn faster to retain competitive
advantage. This rise in demand for coaching has raised questions about the quality of supply, and is driving the establishment of rigorous professional standards for the coaching industry. This exploratory study is concerned with making explicit the 'reality' of developing professional
coaching practice. It takes a critical stance towards formal education as an approach to develop and sustain professional coaching practice. The specific intention was to consider the impact of the i-coach academy masters' programme on developing professional practice, with a view to enhancing the programme and ensuring congruence with participants' needs.
The basic theoretical position lies within the field of Phenomenology, which sets out to obtain knowledge about how we think and feel in the most direct ways; it attempts to 'bracket' assumptions we have about things in order to grasp them in their most essential nature.
The project report documents the phenomenological research I undertook with i-coach academy participants in South Africa and the UK from 2002 - 2005. One of the principle intentions was tounderstand their experience of developing professional practice, separate from the construct of formal education. Equally there was an aim to develop increased clarity about the activities considered most helpful to developing and sustaining professional coaching practice.
The results of this research were used in combination with other materials to enhance the i-coach masters' programme. An educational framework for developing and sustaining professional coaching practice has been documented. The research also points the way to areas for further inquiry and development, which are outlined in the closing chapters.
The experience of the journey to establish a formal framework for the education of professional coaching is reflected well in Machiavelli's quote above. Whilst progress has been made toward establishing a foundation for educating professional coaches, it is also acknowledged that the learning cycles are continuous and the journey is never complete.
1 Extract from The Prince by Nicolo Machiavelli, Written
c. 1505, published 1515, Translated by W. K. Marriott
Pag
A Detailed Investigation of the Proposed NN Serpentis Planetary System
The post-main sequence eclipsing binary NN Serpentis was recently announced
as the potential host of at least two massive planetary companions. In that
work, the authors put forward two potential architectures that fit the
observations of the eclipsing binary with almost identical precision. In this
work, we present the results of a dynamical investigation of the orbital
stability of both proposed system architectures, finding that they are only
stable for scenarios in which the planets are locked in mutual mean motion
resonance. In the discovery work, the authors artificially fixed the orbital
eccentricity of the more massive planet, NN Ser(AB) c, at 0. Here, we reanalyse
the observational data on NN Serpentis without this artificial constraint, and
derive a new orbital solution for the two proposed planets. We detail the
results of further dynamical simulations investigating the stability of our new
orbital solution, and find that allowing a small non-zero eccentricity for the
outer planet renders the system unstable. We conclude that, although the
original orbits proposed for the NN Serpentis planetary system prove
dynamically feasible, further observations of the system are vital in order to
better constrain the system's true architecture.Comment: Accepted for publication in Monthly Notices of the Royal Astronomical
Society; 5 figures, 2 table
Building an On-Ramp to Children's Health Coverage: A Report on California's Express Lane Eligibility Program
Documents the successes and current policy and procedural barriers to enrolling eligible but uninsured children through California's Express Lane Eligibility initiative, which has been piloted in 72 schools in five school districts across California
The Dynamical History of Chariklo and its Rings
Chariklo is the only small Solar system body confirmed to have rings. Given
the instability of its orbit, the presence of rings is surprising, and their
origin remains poorly understood. In this work, we study the dynamical history
of the Chariklo system by integrating almost 36,000 Chariklo clones backwards
in time for one Gyr under the influence of the Sun and the four giant planets.
By recording all close encounters between the clones and planets, we
investigate the likelihood that Chariklo's rings could have survived since its
capture to the Centaur population. Our results reveal that Chariklo's orbit
occupies a region of stable chaos, resulting in its orbit being marginally more
stable than those of the other Centaurs. Despite this, we find that it was most
likely captured to the Centaur population within the last 20 Myr, and that its
orbital evolution has been continually punctuated by regular close encounters
with the giant planets. The great majority (> 99%) of those encounters within
one Hill radius of the planet have only a small effect on the rings. We
conclude that close encounters with giant planets have not had a significant
effect on the ring structure. Encounters within the Roche limit of the giant
planets are rare, making ring creation through tidal disruption unlikely
An Orbital Stability Study of the Proposed Companions of SW Lyncis
We have investigated the dynamical stability of the proposed companions
orbiting the Algol type short-period eclipsing binary SW Lyncis (Kim et al.
2010). The two candidate companions are of stellar to sub-stellar nature, and
were inferred from timing measurements of the system's primary and secondary
eclipses. We applied well-tested numerical techniques to accurately integrate
the orbits of the two companions and to test for chaotic dynamical behaviour.
We carried out the stability analysis within a systematic parameter survey
varying both the geometries and orientation of the orbits of the companions, as
well as their masses. In all our numerical integrations we found that the
proposed SW Lyn multi-body system is highly unstable on time-scales on the
order of 1000 years. Our results cast doubt on the interpretation that the
timing variations are caused by two companions. This work demonstrates that a
straightforward dynamical analysis can help to test whether a best-fit
companion-based model is a physically viable explanation for measured eclipse
timing variations. We conclude that dynamical considerations reveal that the
propsed SW Lyncis multi-body system most likely does not exist or the
companions have significantly different orbital properties as conjectured in
Kim et al. (2010).Comment: 9 pages, 6 figures, 2 tables. Submitted to and accepted by JASS --
Journal for Astronomy and Space Sciences (using JKAS LaTeX style file
Decoding sequential vs non-sequential two-photon double ionization of helium using nuclear recoil
Above 54.4 eV, two-photon double ionization of helium is dominated by a
sequential absorption process, producing characteristic behavior in the single
and triple differential cross sections. We show that the signature of this
process is visible in the nuclear recoil cross section, integrated over all
energy sharings of the ejected electrons, even below the threshold for the
sequential process. Since nuclear recoil momentum imaging does not require
coincident photoelectron measurement, the predicted images present a viable
target for future experiments with new short-pulse VUV and soft X-ray sources.Comment: 4 pages, 3 figure
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