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"Marshall, Jenni"
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Poverty reduction strategy papers (PRSPs)-fulfilling their potential for children in poverty?
2002
Poverty Reduction Strategy Papers (PRSPs) are currently at the centre of development assistance and planning in many countries and donor agencies. As such, they are potentially of enormous significance for children living in poverty. Based on a review of PRSP documents, authors' experiences and other evidence, the paper explores the main policies of economic growth and social sector investment laid out in PRSPs and some likely implications for children's lives and equitable development. It examines how far PRSPs recognize childhood poverty as a priority, and the strategies' often limited commitments to tackle it. The paper reflects on changes in policy planning, budgeting and review processes associated with PRSPs and examines their potential to contribute to effective poverty reduction. It concludes that, to date, changes in these processes are the most significant contribution of PRSPs; while the potential for more effective policy is strong, much work is required by all involved before they are a comprehensive or strategic approach to reducing childhood poverty or securing the wellbeing of future generations. Copyright © 2002 John Wiley & Sons, Ltd.
Journal Article
Biased escorts: offspring sex, not relatedness explains alloparental care patterns in a cooperative breeder
by
Nichols, Hazel J.
,
Bell, Matthew B. V.
,
Gilchrist, Jason S.
in
Alloparental Care
,
Altruism
,
Animals
2017
Kin selection theory predicts that animals should direct costly care where inclusive fitness gains are highest. Individuals may achieve this by directing care at closer relatives, yet evidence for such discrimination in vertebrates is equivocal. We investigated patterns of cooperative care in banded mongooses, where communal litters are raised by adult ‘escorts’ who form exclusive caring relationships with individual pups. We found no evidence that escorts and pups assort by parentage or relatedness. However, the time males spent escorting increased with increasing relatedness to the other group members, and to the pup they had paired with. Thus, we found no effect of relatedness in partner choice, but (in males) increasing helping effort with relatedness once partner choices had been made. Unexpectedly, the results showed clear assortment by sex, with female carers being more likely to tend to female pups, and male carers to male pups. This sex-specific assortment in helping behaviour has potential lifelong impacts on individual development and may impact the future size and composition of natal groups and dispersing cohorts. Where relatedness between helpers and recipients is already high, individuals may be better off choosing partners using other predictors of the costs and benefits of cooperation, without the need for possibly costly within-group kin discrimination.
Journal Article
Mind the gap: science and engineering education at the secondary-tertiary interface
by
Case, Jenni
,
Marshall, Delia
,
Grayson, Diane
in
College curriculum
,
Core curriculum
,
Curricula
2013
In the South African higher education sector, there is increasing concern about the poor retention and throughput rates of undergraduate students. There is also concern that the participation rates in higher education, relative to population demographics, remain extremely racially skewed. With the quality of schooling unlikely to change dramatically in the short term, universities need to look for ways to improve student success, particularly in science and engineering, where graduates are needed for a range of key roles in society. Here we review the research presented at a forum held by the Academy of Science of South Africa in 2010, which sought to bring together the latest expert thinking in this area. The major focus of academic development to date has been the establishment of extended degree programmes. However, it is clear that this model has limited capacity to deal with what is, in fact, a much broader problem. We summarise existing interventions aimed at reducing the 'gap' between secondary and tertiary education, and describe key innovations in mainstream programmes that are possible at the levels of pedagogy, curriculum and institutional environment, some of which are also becoming established internationally in science and engineering. Driving such initiatives will demand visionary university leadership in order to effect the integrated and holistic change that is needed.
Journal Article
Biased escorts: offspring sex, not relatedness explains alloparental care patterns in a cooperative breeder
2017
Kin selection theory predicts that animals should direct costly care where inclusive fitness gains are highest. Individuals may achieve this by directing care at closer relatives, yet evidence for such discrimination in vertebrates is equivocal. We investigated patterns of cooperative care in banded mongooses, where communal litters are raised by adult 'escorts' who form exclusive caring relationships with individual pups. We found no evidence that escorts and pups assort by parentage or relatedness. However, the time males spent escorting increased with increasing relatedness to the other group members, and to the pup they had paired with. Thus, we found no effect of relatedness in partner choice, but (in males) increasing helping effort with relatedness once partner choices had been made. Unexpectedly, the results showed clear assortment by sex, with female carers being more likely to tend to female pups, and male carers to male pups. This sex-specific assortment in helping behaviour has potential lifelong impacts on individual development and may impact the future size and composition of natal groups and dispersing cohorts. Where relatedness between helpers and recipients is already high, individuals may be better off choosing partners using other predictors of the costs and benefits of cooperation, without the need for possibly costly within-group kin discrimination.
Journal Article
Mind the gap : science and engineering education at the secondary-tertiary interface : review article
by
Marshall, Delia
,
Case, Jenni
,
Grayson, Diane
in
Academic development
,
curriculum responsiveness
,
Educational innovation
2013
In the South African higher education sector, there is increasing concern about the poor retention and throughput rates of undergraduate students. There is also concern that the participation rates in higher education, relative to population demographics, remain extremely racially skewed. With the quality of schooling unlikely to change dramatically in the short term, universities need to look for ways to improve student success, particularly in science and engineering, where graduates are needed for a range of key roles in society. Here we review the research presented at a forum held by the Academy of Science of South Africa in 2010, which sought to bring together the latest expert thinking in this area. The major focusof academic development to date has been the establishment of extended degree programmes. However, it is clear that this model has limited capacity to deal with what is, in fact, a much broader problem. We summarise existing interventions aimed at reducing the 'gap' between secondary and tertiary education, and describe key innovations in mainstream programmes that are possible at the levels of pedagogy, curriculum and institutional environment, some of which are also becoming established internationally in science and engineering. Driving such initiatives will demand visionary university leadership in order to effect the integrated and holistic change that is needed.
Journal Article
Continuity within primary palliative care: an audit of general practice out‐of‐hours co‐operatives
by
Shipman, Cathy
,
Marshall, Nigel
,
Stimson, Amanda
in
After-Hours Care - standards
,
Care
,
Continuity
2004
Background The transfer of information between general practitioners (GPs) and their out‐of‐hours providers on vulnerable patient groups is essential to ensure continuity of care. This will be critical when, in 2006, NHS Direct will triage and route all out‐of‐hours calls. This study investigates the current use of information handover systems for palliative care patients within four out‐of‐hours co‐operatives. Methods Paper records of all 13460 contacts during August 2002 were scrutinized. Using a standardized data extraction form we recorded details on all palliative or terminal contacts, and the existence of information handover. Results Across the four co‐operatives, 2.1 per cent of all calls were from palliative care patients; co‐operatives held handover information for between one (1.2 per cent) and 13 (32.5 per cent) of these patients. Conclusion The systems in place to alert these co‐operatives to the needs of palliative care patients are currently under‐utilized. As services move towards an integrated approach, scrutiny of information transfer systems and encouragement of GPs and district nurses to update information, may help to ensure better continuity of care
Journal Article
High optical to X-ray polarization ratio reveals Compton scattering in BL Lacertae's jet
by
Poutanen, Juri
,
Bucciantini, Niccolo
,
Ettore Del Monte
in
Blazars
,
Confidence intervals
,
Elastic scattering
2025
Blazars, supermassive black hole systems (SMBHs) with highly relativistic jets aligned with the line of sight, are the most powerful long-lived emitters of electromagnetic emission in the Universe. We report here on a radio to gamma-ray multiwavelength campaign on the blazar BL Lacertae with unprecedented polarimetric coverage from radio to X-ray wavelengths. The observations caught an extraordinary event on 2023 November 10-18, when the degree of linear polarization of optical synchrotron radiation reached a record value of 47.5%. In stark contrast, the Imaging X-ray Polarimetry Explorer (IXPE) found that the X-ray (Compton scattering or hadron-induced) emission was polarized at less than 7.4% (3sigma confidence level). We argue here that this observational result rules out a hadronic origin of the high energy emission, and strongly favors a leptonic (Compton scattering) origin, thereby breaking the degeneracy between hadronic and leptonic emission models for BL Lacertae and demonstrating the power of multiwavelength polarimetry to address this question. Furthermore, the multiwavelength flux and polarization variability, featuring an extremely prominent rise and decay of the optical polarization degree, is interpreted for the first time by the relaxation of a magnetic \"spring\" embedded in the newly injected plasma. This suggests that the plasma jet can maintain a predominant toroidal magnetic field component parsecs away from the central engine.
Polarized Blazar X-rays imply particle acceleration in shocks
by
Poutanen, Juri
,
Ettore Del Monte
,
Kitaguchi, Takao
in
Active galactic nuclei
,
Blazars
,
Deposition
2023
Most of the light from blazars, active galactic nuclei with jets of magnetized plasma that point nearly along the line of sight, is produced by high-energy particles, up to \\(\\sim 1\\) TeV. Although the jets are known to be ultimately powered by a supermassive black hole, how the particles are accelerated to such high energies has been an unanswered question. The process must be related to the magnetic field, which can be probed by observations of the polarization of light from the jets. Measurements of the radio to optical polarization - the only range available until now - probe extended regions of the jet containing particles that left the acceleration site days to years earlier (Jorstad et al., 2005; Marin et al., 2018; Blinov et al., 2021), and hence do not directly explore the acceleration mechanism, as could X-ray measurements. Here we report the detection of X-ray polarization from the blazar Markarian~501 (Mrk~501). We measure an X-ray linear polarization degree \\(\\Pi_X \\sim10\\%\\), a factor of \\(\\sim2\\) higher than the value at optical wavelengths, with a polarization angle parallel to the radio jet. This points to a shock front as the source of particle acceleration, and also implies that the plasma becomes increasingly turbulent with distance from the shock.
Observations of Low and Intermediate Spectral Peak Blazars with the Imaging X-ray Polarimetry Explorer
2023
We present X-ray polarimetry observations from the Imaging X-ray Polarimetry Explorer (IXPE) of three low spectral peak and one intermediate spectral peak blazars, namely 3C 273, 3C 279, 3C 454.3, and S5 0716+714. For none of these objects was IXPE able to detect X-ray polarization at the 3\\(\\sigma\\) level. However, we placed upper limits on the polarization degree at \\(\\sim\\)10-30\\%. The undetected polarizations favor models where the X-ray band is dominated by unpolarized photons upscattered by relativistic electrons in the jets of blazars, although hadronic models are not completely eliminated. We discuss the X-ray polarization upper limits in the context of our contemporaneous multiwavelength polarization campaigns.