The classification and management of limestone pavements - an endangered habitat

This thesis describes an in-depth study of limestone pavements across North West England and North Wales. The aim was to combine elements of geodiversity and biodiversity in order to create a holistic limestone pavement classification to inform future management. A field-based research protocol was used to assess a stratified random sample (46 pavements), accounting for approximately 10% of the limestone pavements in the geographical area. Detailed analyses of key elements are presented, along with important issues that continue to pose threats to this Annex One Priority Habitat. This research resulted in a comprehensive classification, using TWINSPAN analysis and Nonmetric Multidimensional Scaling, identifying six distinct holistic functional groups. The prime factors driving limestone pavement morphology, and hence the classification, were established to be lithology, proximity to structural fault, altitude and human intervention, particularly in terms of grazing intensity. Three upland, open limestone pavement classes were formed. Of these, the richest in terms of geodiversity and biodiversity was the group with the thickest bedding planes and hence the deepest grikes, typically greater than 1m. The class that was most species-poor was "at the highest altitude (above 450m), formed on the thin limestones of the Yoredales. These were characterised by shallow, wide grikes. The third upland limestone pavement group had mid-range grikes, generally 0.5-1m in depth, and small clints. Two wooded classes were identified. One was a lowland 'classic' wooded limestone pavement group with deep, narrow grikes and shallow soils. Indicator species included Juniperus communis and Taxus baccata. The second wooded group was situated proximal to a major structural fault. In this group the pavement dip ranged between 10°-40° with well-runnelled clints that were heavily moss-covered. The sixth group was low altitude, proximal to the coast, characterised by low moss growth, un-vegetated clints and the presence of Ulex europaeus. Conservation management was identified as key to the quality of the limestone pavement habitat and this thesis identifies best management practises and links these to the holistic limestone pavement classification. Finally, as a sample case study, this thesis presents mollusc species and diversity from eleven of the Yorkshire limestone pavements. Analysis establishes significant links between geodiversity and mollusc populations, with key drivers for mollusc communities echoing those of plant species on limestone pavement.Funded by the Yorkshire Dales National Park and the University of Chester

Block 4 receiver tracking loop performance in the presence of a CW RFI

A model that allows one to predict the tracking performance of the Block 4 receiver in the presence of a continuous wave radio frequency interference is discussed. Experimental and analytical results are provided for a typical Deep Space Network operational mode. Simulation and experimental results show good agreement with theoretical prediction for the static phase error and out-of-lock values. Predicted phase jitter is consistently lower than the experimental and simulated results by a factor of one-half for small interference to signal ratio (ISR) when the offset frequency is small. For large ISR, good agreement is observed. The analytical model assumes a noiseless condition, which is valid only when the loop is operated at strong signal levels. Experimental data indicate, however, that even at the minimum operating signal level of 10-dB carrier margin, reasonably good prediction can still be obtained. A curve of protection criteria that extends the current recommendation is also presented

Radio frequency interference at the geostationary orbit

Growing demands on the frequency spectrum have increased the possibility of radio frequency interference (RFI). Various approaches to obtain in orbit RFI data are compared; this comparision indicates that the most practical way to obtain RFI data for a desired orbit (such as a geostationary orbit) is through the extrapolation of in orbit RFI measurements by a low orbit satellite. It is concluded that a coherent RFI program that uses both experimental data and analytical predictions provides accurate RFI data at minimal cost

Digital exclusion: potential implications for social work education

QAA Subject Benchmark 5.9 requires social work students to demonstrate the ability to have a critical understanding of the social impact of ICT, including an awareness of the impact of the 'digital divide'. In the twenty-first century, the implications of digital exclusion may become increasingly relevant for the social work profession with its values of empowerment and anti-oppressive practices. As governments and organisations move closer to the provision of online services, the social worker may find themselves addressing the disempowerment of service users and carers disconnected from a virtual welfare state. The concern is that Benchmark 5.9 does not go far enough, that the full significance of this requirement may not be sufficiently realised and a greater awareness urgently called for

Australian coder workforce survey 2002 - managers’ responses

In 1994–5, the Health Information Management Association of Australia (HIMAA) Ltd conducted a nation-wide survey of clinical coders working in Australian hospitals. The survey (National Coder Workforce Issues Project (NCWIP) funded by the then Commonwealth Department of Human Services and Health) provided baseline data about the coder workforce in terms of its size, the educational backgrounds of coders, circumstances relating to their employment and their needs in terms of continuing support and training. Importantly, the survey was conducted before casemix-based classification and funding had been implemented by all states and territories. It has now been nearly eight years since the original survey was conducted and casemix is in use in some form in all states and territories

Where do young people work?

The current policy intention, that all young people remain in some form of accredited education or training to the age of 18 by 2015, poses significant challenges. The jobs without training (JWT) group includes young people who are in full-time work and not in receipt of training leading to National Vocational Qualification level 2 (or above); knowing more about them and meeting their needs will be crucial for the delivery of the Raising of the Participation Age agenda. This paper presents findings from a study of the JWT group, from the perspective of employers, which formed part of wider research including policymakers, young people and their parents. It concludes that the label JWT fails to describe the heterogeneity of this group and the needs of those who employ them. If routes into the labour market remain open to 16- and 17-year-olds, attention must be given to supporting young people's transitions through a more active role in job placement and securing greater support for formalised training

Criminology in the professions: turning academic benchmarks into employability skills

This report reflects on a case study example of teaching a dedicated employability module in an undergraduate criminology curriculum. The report uses various sets of data collected from students, criminology alumni, a sample of employers and university academic and support staff, to reflect on pertinent issues relating to graduate employability. Findings suggest that understanding the links between critical academic theory, technical knowledge and generic skills, are empowering both for staff and students, and such a framework represents a creative way of addressing the QAA criminology employability benchmarks. Whilst staff are unable to change the national context relating to graduate employability, understanding the pertinent issues and contradictions within the area helps in counteracting potential ‘bad news’ and also enables students to be more aware of what they need, beyond their degree, to be successful in gaining appropriate employment. Apart from the research detailed below, outcomes include a DVD entitled ‘Life after Criminology’ which features contributions from criminology alumni, academic and careers staff and students, and also a Mahara portfolio including materials used for a criminology information day held in July 2010

On implicit-factorization constraint preconditioners

Recently Dollar and Wathen [14] proposed a class of incomplete factorizations for saddle-point problems, based upon earlier work by Schilders [40]. In this paper, we generalize this class of preconditioners, and examine the spectral implications of our approach. Numerical tests indicate the efficacy of our preconditioners

A preliminary assessment of age at death determination using the nuclear weapons testing 14C activity of dentine and enamel

Calibration (using CALIBomb) of radiocarbon measurements made on the enamel of human teeth from people born during the nuclear era typically produce 2 possible age ranges that potentially reflect the period of tooth formation. These ranges correspond to periods before and after the 1963 atmospheric 14C maximum. Further measurements made on the collagen component of the combined dentine and cementum from the roots of the same teeth enable the appropriate age range to be selected. Using this range and the formation times for individual teeth, we estimated the year of birth of the individuals and compared these to the known dates of birth. The results were relatively accurate and confirmed those of a previous study by another research group. The present study demonstrates that it is possible to produce a good estimate of the year of birth from a single tooth