Evidence of exchange networks: the combs and other worked skeletal material

Significant contribution to the study of skeletal material in the Norse period using large internationally significant assemblage from Norse site in Orkney

An investigation of Ikat weaving and warp printing and their application to contemporary design

This work seeks to consider the contribution that Ikat weaving and warp printing could make to contemporary textile design. To do this the research first considered the historical background to Ikat weaving and warp printing by examining'the visual and structural characteristics involved and the definitions used historically. Then by studying in some detail the methods of manufacture, dyestuffs, and design imagery of warp Ikats from South America and Central Asia, and weft and double Ikats from Indonesia and Japan a particular was made with a detailed study comparison of these Ikat techniques in The first volume of this work concluded with a detailed study of warp, weft and double Ikats in Japan. From this historic basis and analysis of the various techniques used experiments were devised to understand more clearly the effect of fibre, structure, colouration, warp design and its positioning on the image produced in the fabric. In investigating this a series of practical experiments was carried out on warp printed wool, cotton and silk fabrics and measurements made of the effects of the variables. These results were used to undertake a second series of experiments using slub weft yarns, warp printed silk and warp printed cotton fabrics made from a double warp. The work established from an historical viewpoint that the Ikat weavers were familiar and well practised within the traditional design limits of their craft but that these limits were differently defined for the various types of Ikat produced throughout the world. From the technological experiments the factors controlling the image, its size, position. and effect were determined so that ultimately exemplar design effects were created which suggested ways in which this technique could be developed in the future

Near-field sonic-boom pressure signatures for the space shuttle launch and orbiter vehicles at Mach 6

Static-pressure signatures parallel to the flight path of the launch and entry configurations of the space shuttle were measured. The launch configurations, consisting of an equivalent body of revolution (representing the orbiter and external fuel tank) with a solid exhaust gas plume attached, was tested at an angle of attack of 0 deg. The entry configuration (orbiter only) was tested over an angle-of-attack range from 10 deg to 40 deg. Calculated pressure signatures were in good agreement with measured signatures for both configurations

Aerodynamic testing technique for twin fuselage models at hypersonic speeds

A testing technique for obtaining the static aerodynamic characteristics of twin-fuselage configurations at hypersonic speeds by using a conventional single-balance installation has been evaluated. Data from a triple-fuselage model and a single-fuselage model were summed and then halved to obtain the characteristics for a twin-fuselage model of the same scale. The three related models were evaluated experimentally at Mach 20.3 in helium and Mach 6 in air for an angle-of-attack range from minus 6 deg to 50 deg. The Reynolds numbers, based on model length, were 1.88 million for the Mach 20.3 tests and 2.55 million for the Mach 6 tests

Theory of magnetic oscillations in Weyl semimetals

Weyl semimetals are a new class of Dirac material that posses bulk energy nodes in three dimensions. In this paper, we study a Weyl semimetal subject to an applied magnetic field. We derive expressions for the density of states, electronic specific heat, and the quantum oscillations of the magnetization, DC conductivity, and thermal conductivity. We find phase shifts in the quantum oscillations that distinguish the Weyl semimetal from conventional three dimensional Schr\"odinger Fermions.Comment: 11 pages, 5 figure

SCRAM: Software configuration and management for the LHC Computing Grid project

Recently SCRAM (Software Configuration And Management) has been adopted by the applications area of the LHC computing grid project as baseline configuration management and build support infrastructure tool. SCRAM is a software engineering tool, that supports the configuration management and management processes for software development. It resolves the issues of configuration definition, assembly break-down, build, project organization, run-time environment, installation, distribution, deployment, and source code distribution. It was designed with a focus on supporting a distributed, multi-project development work-model. We will describe the underlying technology, and the solutions SCRAM offers to the above software engineering processes, while taking a users view of the system under configuration management.Comment: Computing in High Energy and Nuclear Physics, La Jolla, California, March 24-28, 2003 1 tar fil

Dewpoint temperature inversions analyzed

Dewpoint temperature inversion, with regard to other simultaneous meteorological conditions, was examined to establish the influence of meteorological variables on the variation of dewpoint temperature with height. This report covers instrumentation and available data, all the climatological features of dewpoint inversions, and specific special cases

UK open source crime data: accuracy and possibilities for research

In the United Kingdom, since 2011 data regarding individual police recorded crimes have been made openly available to the public via the police.uk website. To protect the location privacy of victims these data are obfuscated using geomasking techniques to reduce their spatial accuracy. This paper examines the spatial accuracy of the police.uk data to determine at what level(s) of spatial resolution – if any – it is suitable for analysis in the context of theory testing and falsification, evaluation research, or crime analysis. Police.uk data are compared to police recorded data for one large metropolitan Police Force and spatial accuracy is quantified for four different levels of geography across five crime types. Hypotheses regarding systematic errors are tested using appropriate statistical approaches, including methods of maximum likelihood. Finally, a “best-fit” statistical model is presented to explain the error as well as to develop a model that can correct it. The implications of the findings for researchers using the police.uk data for spatial analysis are discussed