4,028 research outputs found
Recruiting faith and non-faith based schools, adolescents and parents to a cluster randomised sexual-health trial: experiences, challenges and lessons from the mixed-methods Jack Feasibility Trial
Supporting Computing Educators to Create a Cycle of Teaching and Computing Education Research
Despite a rich history of computing education in the United Kingdom and Ireland, computing educators often rely on the same procedures and teaching practices rather than embrace innovations. Similarly, while a growing collection of literature exists on educational theory and practice in computing education, much of this focuses on the same concepts and concerns. An aspiration is that both these problems can be simultaneously addressed by computing educators adopting a cycle of embracing existing literature when devising teaching practice and then feeding their experience and findings back to the community in a rigorous fashion. Consequently, this panel supports computing educators by acting as advisers on a one-on-one basis to support audience members in discovering or devising their own cycle of teaching practice and computing education research
Co-creating a Framework for Student Engagement: Student and Staff Reflections on a Journey to Partnership
Co-creating a Framework for Student Engagement: Student and Staff Reflections on a Journey to Partnership
Supersolar Ni/Fe production in the Type IIP SN 2012ec
SN 2012ec is a Type IIP supernova (SN) with a progenitor detection and
comprehensive photospheric-phase observational coverage. Here, we present Very
Large Telescope and PESSTO observations of this SN in the nebular phase. We
model the nebular [O I] 6300, 6364 lines and find their strength to suggest a
progenitor main-sequence mass of 13-15 Msun. SN 2012ec is unique among
hydrogen-rich SNe in showing a distinct and unblended line of stable nickel [Ni
II] 7378. This line is produced by 58Ni, a nuclear burning ash whose abundance
is a sensitive tracer of explosive burning conditions. Using spectral synthesis
modelling, we use the relative strengths of [Ni II] 7378 and [Fe II] 7155 (the
progenitor of which is 56Ni) to derive a Ni/Fe production ratio of 0.20pm0.07
(by mass), which is a factor 3.4pm1.2 times the solar value. High production of
stable nickel is confirmed by a strong [Ni II] 1.939 micron line. This is the
third reported case of a core-collapse supernova producing a Ni/Fe ratio far
above the solar value, which has implications for core-collapse explosion
theory and galactic chemical evolution models.Comment: Published versio
Effects of Cation Vacancy Distribution in Doped LaMnO3+d Perovskites
In this paper we report studies on the correlation between the presence and
distribution of cation vacancies in doped manganites (La,M)MnO3+delta (where M
= Na, Ca) and their magnetic properties. Results indicate that cation vacancies
are distributed differently for the different crystal structures and dopant ion
type. In particular it is shown that knowledge of the total vacancies
concentration alone is not enough to fully characterize the physical properties
of manganites and that their distribution between the A and B sites of the
perovskite structure plays a crucial role which should be taken into account in
future studies.Comment: 27 pages, 5 figure. To appear in J. Solid State Che
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