The Effect of X-Rays on the Rate of Cell Division in the Early Cleavage of Planorbis

Waller Creek Working Grou

The Nature of Radio Emission from Distant Galaxies

I describe an observational program aimed at understanding the radio emission from distant, rapidly evolving galaxy populations. These observations were carried out at 1.4 and 8.5 GHz with the VLA centered on the Hubble Deep Field. Further MERLIN observations of the HDF region at 1.4 GHz provided an angular resolution of 0.2" and when combined with the VLA data produced an image with an unprecedented rms noise of 4 $\mu$Jy. All radio sources detected in the VLA complete sample are resolved with a median angular size of 1-2". The differential count of the radio sources is marginally sub-Euclidean ($\gamma$ = -2.4 $\pm$ 0.1) and fluctuation analysis suggests nearly 60 sources per arcmin$^2$ are present at the 1 $\mu$Jy level. A correlation analysis indicates spatial clustering among the 371 radio sources on angular scales of 1- 40 arcmin. Optical identifications are made primarily with bright (I = 22) disk systems composed of irregulars, peculiars, interacting/merging galaxies, and a few isolated field spirals. Available redshifts span the range 0.2 - 3. These clues coupled with the steep spectral index of the 1.4 GHz selected sample are indicative of diffuse synchrotron radiation in distant galactic disks. Thus the evolution in the microjansky radio population is driven principally by star-formation. I have isolated a number of optically faint radio sources (about 25% of the overall sample) which remain unidentified to I = 26-28 in the HDF and flanking optical fields. Several of these objects have extremely red counterparts and constitute a new class of radio sources which are candidate high-z dusty protogalaxies.Comment: dissertation summary to be published in PASP, sucessfully defended on May 19, 1999 at the University of Virginia, committee composed of R. W. O'Connell (UVa), K. I. Kellermann (NRAO), E. B Fomalont (NRAO), T. X. Thuan (UVa), P. Humphreys (UVa), and J. Wall (Oxford

A Radio Perspective on Star-Formation in Distant Galaxies

Determination of the epoch dependent star-formation rate of field galaxies is one of the principal goals of modern observational cosmology. Deep radio surveys, sensitive to starbursts out to $z \sim$ 1-2, may hold the key to understanding the evolution of the starburst phenonemon unhindered by the effects of dust. Using deep, high resolution radio observations of the Hubble Deep Field, we show that the $\mu$Jy radio emission from field galaxies at $z\sim 0.4-1$ is primarily starburst in origin. In addition, we have discovered a population of optically faint, possibly obscured systems that are candidate high-$z$ protogalaxies. At least one of these radio sources is identified with a sub-mm detection.Comment: 4 pages, 3 figs., paper presented at Maryland October Astrophysics Conference, 'Before the Dark Ages: When the Galaxies were Young

Supporting Knitwear Design Using Case-Based Reasoning

Organised by: Cranfield UniversityKnitwear design is a creative activity that is hard to automate using the computer. The production of the associated knitting pattern, however, is repetitive, time-consuming and error-prone, calling for automation. Our objectives are two-fold: to facilitate the design and to ease the burden of calculations and checks in pattern production. We conduct a feasibility study for applying case-based reasoning in knitwear design: we describe appropriate methods and show how they can be implemented.Mori Seiki – The Machine Tool Compan

What can we do for LGBQ youth in north Yorkshire

This report is the summary of a five-month project commissioned by Yorkshire MESMAC which investigated the provision of support for lesbian,gay, bisexual and questioning (LGBQ) youth livingin the North Yorkshire sub-region. The projectconsisted of two elements: Study - Part 1 The first part of the study was a mapping exerciseof the current support available to LGBQ youth(16-25) in the North Yorkshire sub-region. Fivevoluntary and 15 statutory sector service providers provided input. Assessment was based on the extent to which each service provider catered for the specific needs of LGBQ youth. Results indicated a deficit in LGBQ specific service provision. Support specifically aimed at the LGBQ population was limited to three voluntary sector service providers and one youth group. Generic service providers varied in their ability to cater for the needs of LGBQ youth and only one was found to adequately address the needs of LGBQ youth. Study - Part 2 The second part of the study involved a qualitative investigation into the experiences and perceived needs of twenty-two LGBQ youth living in the North Yorkshire sub-region. Participants reported a diverse range of needs linked to their perceptions of isolation and a lack of social support. Recommendations Based upon the findings from Parts 1 and 2 of this study, the following recommendations are offered: ● The development of a sub-regional internet site for rural LGBQ youth to access information and online support ● The establishment of LGBQ youth groups across the county, preferably run on weekends, and at times that coincide with the provision of public transport ● The provision of drop-in venues with appropriately trained support staff ● The provision of training opportunities for staff within generic support services. ● Regular evaluation of LGBQ youth provision among generic services and regular monitoring of access by LGBQ youth ● The development and maintenance of links between service providers for LGBQ communities and more generic service providers

Radar signature determination: Trends and limitations

Modelling studies, as means for assessing what could be called radar signatures, are a part of two radar remote sensing research programs with which the author is affiliated. First, at the University of New South Wales, assessment of SIR-B data is being undertaken for a number of purposes including its value in arid land geomorphological and geological studies, forest and crop assessment, and mapping. A number of early results have been reported, however modelling aspects are still at an early stage. Secondly, the author recently spent 6 months working on SIR-B invertible forest canopy modelling in the Department of Geography at the University of California, Santa Barbara. Results from this work are outlined

Mainstream parallel array programming on cell

We present the E] compiler and runtime library for the ‘F’ subset of the Fortran 95 programming language. ‘F’ provides first-class support for arrays, allowing E] to implicitly evaluate array expressions in parallel using the SPU coprocessors of the Cell Broadband Engine. We present performance results from four benchmarks that all demonstrate absolute speedups over equivalent ‘C’ or Fortran versions running on the PPU host processor. A significant benefit of this straightforward approach is that a serial implementation of any code is always available, providing code longevity, and a familiar development paradigm

Tourette syndrome research highlights 2015 [version 1; referees: 3 approved]

We present selected highlights from research that appeared during 2015 on Tourette syndrome and other tic disorders. Topics include phenomenology, comorbidities, developmental course, genetics, animal models, neuroimaging, electrophysiology, pharmacology, and treatment. We briefly summarize articles whose results we believe may lead to new treatments, additional research or modifications in current models of TS