Supercritical Conversion Of The 3rd Blue Phase To The Isotropic-Phase In A Highly Chiral Liquid-Crystal

The results of two independent experiments in the vicinity of the “transition” from the third blue phase ( BPIII) to isotropic phase ( I) are reported for a highly chiral liquid crystal. Heat capacity measurements using a high-resolution calorimeter and dynamic light-scattering measurements using circularly polarized light have been performed. The data show a continuous evolution of BPIII into I with no critical fluctuations. This is strong evidence that the BPIII-I transition in this compound is supercritical, indicating that the BPIII and I phases possess the same macroscopic symmetry

Design methodology and performance of an indraft wind tunnel

The design methodology and performance of Loughborough University’s new 1·9m × 1·3m, indraft wind tunnel is discussed in the following paper. To overcome severe spatial and financial constraints, a novel configuration was employed, with the inlet and exit placed adjacent to each other and opened to atmosphere. Using a fine filter mesh, honeycomb, two turbulence reduction screens and a contraction ratio of 7·3, flow uniformity in the working area of the jet at 40ms-1 is shown to be within 0·3% deviation from the mean velocity, with turbulence intensity in the region of 0·15%. Working section boundary layer characteristics are shown to be consistent with that of a turbulent boundary layer growing along a flat plate, which originates at the point of inflection of the contraction. A maximum velocity of 46ms-1 was achieved from a 140kW motor, compared to a prediction of 44ms-1, giving an energy ratio of 1·42. Comparison between theoretical and measured performance metrics indicate differences between the way modules perform when part of a wind tunnel system compared to data gathered from test rigs

Archaeology and Environment in Northumberland

Eventful, influential and absorbing, the early history of Northumberland is a fascinating story that has rarely been brought together under one cover. In this authoritative historical account, the authors bring to bear a huge quantity of old and new data and craft it into an in-depth synthesis. The authors deliver this history in chronological order from a perspective that places human activity and environment at its core. The narrative extends from the Palaeolithic through to, and including, the Anglo-Saxon period. This enormous sweep of history is supported by a robust radiocarbon chronology, with all available dates for the region brought together and calibrated against the most recent calibration curves for the first time. The geographic focus of the volume is North Northumberland but the narrative frequently extends to cover the whole county and occasionally further afield into neighbouring areas so as to deal with key topics at an appropriate geographic scale and to take account of important information from nearby areas. This second volume in the Till-Tweed monograph series follows on from the first volume, Managing Archaeological Landscapes in Northumberland , which provided a considerable quantity of new field data, in addition to presenting a landscape management methodology based around the "landform element" approach

Design and performance of thin, circular arc, wind-tunnel turning vanes

The design methodology and performance of Loughborough University’s new 1·9m × 1·3m, indraft wind tunnel is discussed in the following paper. To overcome severe spatial and financial constraints, a novel configuration was employed, with the inlet and exit placed adjacent to each other and opened to atmosphere. Using a fine filter mesh, honeycomb, two turbulence reduction screens and a contraction ratio of 7·3, flow uniformity in the working area of the jet at 40ms-1 is shown to be within 0·3% deviation from the mean velocity, with turbulence intensity in the region of 0·15%