187 research outputs found
Benchmarking of a 1D scrape-off layer code SOLF1D with SOLPS and its use in modelling long-legged divertors
No full textMinding the protection gap: estimates of species' range sizes and holes in the Protected Area network
No full text[No abstract available
Obesity is a risk factor for musculoskeletal conditions in primary school age girls
No full textCommentary on: Firman N, Homer K, Harper G, et al. Are children living with obesity more likely to experience musculoskeletal symptoms during childhood? A linked longitudinal cohort study using primary care records. Arch Dis Child. 2024 Apr 18;109(5):414-421
Bird species richness and diversity at montane Important Bird Area (IBA) sites in south-eastern Nigeria
No full textThe mountains of south-eastern Nigeria are a western extension of the Cameroon mountain range, which is classified as an endemic bird area (EBA). Unlike its eastern extension in Cameroon, most of the ornithological surveys in the western extension of the Cameroon highlands in Nigeria have produced only limited checklists and inventories. There is a clear need for quantitative baseline data so that conservation problems can be identified. Twenty line transects covering a total transect length of 28.8 km were used to survey five sites (Afi Mountain Wildlife Sanctuary, Oban and Okwangwo Division of Cross River National Park, Sankwala Mountains and Mbe Mountains) in the westernmost extension of the Cameroon Mountains EBA in south western Nigeria. Vegetation measurements were taken to control for the potential confounding effect of variation in vegetation density and structure on detectability of birds between sites. The 193 bird species recorded in Afi, 158 in Sankwala, 124 in Oban, 100 in Mbe and 73 in Okwangwo Division included most of the Cameroon highlands restricted range species. The results show that the mountains of south-eastern Nigeria are important parts of the Cameroon EBA, particularly the Afi Mountain Wildlife Sanctuary. However these sites are threatened by fire and livestock grazing on the hilltops, shifting agriculture on the hillsides and lowlands, and logging for timber in some parts, as well as wildlife hunting for bush meat.Peer reviewe
L-Mode and Inter-ELM Divertor Particle and Heat Flux Width Scaling on MAST L-Mode and Inter-ELM Divertor Particle and Heat Flux Width Scaling on MAST L-mode and inter-ELM divertor particle and heat flux width scaling on MAST L-Mode and Inter-ELM Divertor
No full textAbstract The distribution of particles and power to plasma-facing components is of key importance in the design of next-generation fusion devices. Power and particle decay lengths have been measured in a number of MAST L-mode and H-mode discharges in order to determine their parametric dependencies, by fitting power and particle flux profiles measured by divertor Langmuir probes, to a convolution of an exponential decay and a Gaussian function. In all discharges analysed, it is found that exponential decay lengths mapped to the midplane are mostly dependent on separatrix electron density (n e,sep 0.650.15 L-mode, n e,sep 0.760.19 H-mode) and plasma current (I p -0.360.11 L-mode, I p -1.050.18 H-mode) (or parallel connection length). The widths of the convolved Gaussian functions have been used to derive an approximate diffusion coefficient, which is found to vary from 1m 2 /s to 7m 2 /s, and is systematically lower in H-mode compared with L-mode
Evolutionary conservation genetics of invasive and endemic parrots
No full textThe world is now thought to have entered into a sixth mass extinction event, which unlike previous mass extinctions, is entirely driven by human impacts. The early colonisation of humans has led to as many as a thousand endemic bird species becoming extinct, while increasing human mediated transport of species around the world has led to invasive species becoming one of the largest global conservation challenges of today. Studies in molecular ecology can help us to unravel how evolutionary processes are important for informing conservation and invasion biology by understanding genetic mechanisms that enable populations to grow and adapt in a changing world. As genetic diversity is essential for the persistence of populations, this thesis aims to understand how species respond, at a genetic level, to human-driven events such as the reduction of a population to a small size, or the introduction of a species into a novel environment. The findings demonstrate the important use of genetic markers for phylogenetic reconstruction and understanding population structure. These phylogenetic reconstructions examine taxonomic distinctiveness and patterns of evolution, and allow the identification of ancestral origins for invasive ring-necked parakeets. Evidence from genetic phylogroups, trade data and drivers of population growth, highlight how multiple introductions and patterns of climate matching between the native and invasive ranges of ring-necked parakeets, are mechanisms for invasion success. In contrast to mild genetic bottleneck effects, high levels of diversity and the avoidance of problems associated with small population size within populations of invasive ring-necked parakeet, the endemic Seychelles black parrot exhibited a reduction in population size and reduced levels of genetic diversity over time. Moreover, the inclusion of new genetic data for a number of extinct parrot species enabled an examination of the loss of broader scale phylogenetic diversity, important for ecosystem function, as a result of extinctions of endemic species and invasions of ring-necked parakeets. The findings from this thesis have already been applied to conservation and invasion biology by contributing to the reclassification of the endemic Seychelles black parrot, and to improving the ability of ecological niche models to predict areas suitable for future invasions of ring-necked parakeets. Furthermore they provide a novel approach to identifying potential candidates as ecological replacements to restore ecosystem function and lost phylogenetic diversity
Pogonaleyrodes Takahashi 1955
No full text92. Pogonaleyrodes Takahashi P. fastuosa Takahashi Syntype, Madagascar: Manjakatompo, 2000 m, 24.v.1950, (R. Mamet), ex: indet., B.M. 1998-131. P. zimmermanni (Newstead) Syntypes, German East Africa (Tanzania): Amani, ix.1902, (A. Zimmermann 19), ex: Acanthaceae, 48/62 (2 slides). Nigeria: Ibadan, Moor Plantation, xi.1959, (E.A. James), ex: indet. Nigeria: Ibadan, Moor Plantation, vii.1960, (M.O. Ezeigwe), ex: indet. Tanganyika: Tukuyu, South Highlands Prov., xii.1957, (R. G. Tapley), ex: Coffea arabica, C.I.E. 4678/15780, 51/62, B.M. 1962-3 (2 slides). Cote d’Ivoire (Ivory Coast): 20 km W. Abidjan, Adiopodoume, IIRSDA, 17.xi.1989, (L.D.C. Fishpool 74), ex: Aidia genipiflora. Kenya: Gedi forest, south of Malindi, 17.v.1988, (J.H. Martin 5318), ex: Tricalysia ovalifolia.Published as part of Manzari, Shahab & Quicke, Donald L. J., 2006, A cladistic analysis of whiteflies, subfamily Aleyrodinae (Hemiptera: Sternorrhyncha: Aleyrodidae), pp. 2423-2554 in Journal of Natural History 40 (44 - 46) on page 2518, DOI: 10.1080/00222930601121890, http://zenodo.org/record/523048
Modelling the Effect of the Super-X Divertor in MAST Upgrade on Transition to Detachment and Distribution of Volumetric Power Losses
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