Computer programmes for the correction of matrix effects in the XRF analysis of glass,ceramics and related silicate systems

The quantitative analysis of glass, ceramics and related silicate systems by means of energy dispersive X-ray fluorescence spectrometry is considered and problems arising from the selective absorption of X-rays in multi-element specimens are discussed. A computer programme written in FORTRAN and based upon a “semi-fundamental parameters” approach to the correction of matrix effects in glass and chemically similar materials is fully described. Model data are provided to enable the programme to be run and tested. An “empirical coefficients” computer programme for the quantitative analysis of silicate systems is outlined and the limitations of this type of programme are pointed out. The importance of adequate sample preparation prior to X-ray spectrometric analysis is stressed.     

Archaeological Assessment of Second World War Anti‐Torpedo Close Protection Pontoons in Scapa Flow,Orkney

This paper presents the outcomes of sidescan sonar and archaeological diving surveys in 2015 of two wrecked vessels located off Flotta Island, Orkney, North Scotland. Archival research indicates these are the remains of Anti‐Torpedo Close Protection Pontoons (ATCPP), an experimental protection device used for close protection of naval vessels at anchor in Scapa Flow from attack by aircraft‐launch torpedoes. The pontoons were only in operation in Scapa Flow for 13 months (March 1941–April 1942) and few were brought into service. As such they represent a rare heritage resource, for which very little is known about their operation.     

元代景教石刻的复制工艺

石刻文物的复制工艺较为复杂,尤其是石刻大器,从制作模具到翻制器物均无成规可循。此次复制元代景教石刻,经过多次实验,从材料的选择、配方及工艺流程都取得了新的经验。     

‘Birds,bogs and forestry’ revisited: The significance of the flow country controversy

This paper evaluates the significance of the battle between forest and conservation interests in the Flow Country of northern Scotland during the late 1980s. It summarises the key arguments for and against afforestation as they were presented at the time, and reviews their validity in the light of subsequent developments. Commercial afforestation was claimed to be an economically valuable land use in a region with few alternatives, whereas conservationists presented the Flow Country as a wetland habitat of international significance. The controversy had far‐reaching consequences both for forest practice and nature conservation in Scotland and the UK. The break‐up of the Nature Conservancy Council and the remit given to Scottish Natural Heritage, the negative public perception of commercial forestry, the adoption of multiple objective forest management, Indicative Forest Strategies, and the participatory philosophy in conservation, can all be wholly or partly traced to the controversy. Ultimately, the controversy is shown to have had positive outcomes both for conservation and forest practice.     

Field Measurements and Numerical Simulation of Debris Flows from Dolomite Slopes Destabilized during the 2005 Kashmir Earthquake,Pakistan

A devastating earthquake occurred in Kashmir, Pakistan on October 8, 2005. This earthquake resulted from reactivation of a known active fault later defined as the Balakot–Bagh fault, which caused widespread slope failure throughout its stretch, particularly around Muzaffarabad, the provincial capital of Azad Jammu and Kashmir. This slope failure resulted in a huge amount of debris material which flows in deeply incised creeks during monsoon and hits the inhabitants along the valley in Muzaffarabad. Two GPS measurements are carried out along with channel morphometric parameters and observed changes to investigate the effect of debris flows along these creeks during monsoon. Other than the physical measurements, actual debris flow is simulated using the Depth Average Material Point Method (DAMPM) after carrying out parametric study and calibrating the model for subject topographical and geological settings. The generalized effect of different input parameters of the model on debris flow runout features is studied and discussed in detail. After ensuring validation of the numerical tool, the contribution of a single closed-type check dam to decrease runout intensity to its downstream reach is also investigated for different locations to obtain optimized selection.     

Implications of hydro-political dependency for international water cooperation and conflict: Insights from new data

Hydro-political dependencies between countries are widely regarded as having important implications for international water cooperation and conflict. Quantitative ex-post empirical research on the subject so far uses very simple characterizations of international river geography to proxy for such dependencies, though. The authors developed a new geo-spatial dataset for water catchments worldwide. This dataset combines elevation models, flow accumulation approaches, hydrological data, and data on international boundaries to generate more precise and nuanced measures of hydro-political dependencies among riparian countries. The paper discusses these measurement concepts, illustrates how dependencies are distributed worldwide, and revisits three prominent quantitative studies on the issue to show how using improved data affects empirical findings. In contrast to a very popular presumption, upstream–downstream dependencies turn out to have a very small to insignificant effect on international water cooperation or conflict.     

The Rolt Memorial Lecture 2018: Science and Engineering at War in Orkney

Initially conceived as a contribution to a conference which was to have been based in Caithness and was to have included a visit to Orkney, this paper examines the scientific and technological background to some of the wartime remains associated with the defence of Scapa Flow, the Royal Navy’s principal fleet anchorage in home waters in World Wars I and II. Summarising the surviving evidence of selected aspects of vessel-related, marine and aerial science and engineering around Scapa Flow, it is prefaced by a short account of Tom Rolt’s own wartime career, and concludes with a comparative appreciation of his place in the pantheon of literary engineers.     

Construction and Interpretation of a 60‐year Flow Record for the river Tay at Kenmore

The backward extension of a river flow record for the River Tay, based on daily water level observations from 1937–76, has created the third‐longest sensibly continuous daily flow record for any Scottish river based on direct observations. The paper describes the derivation of the record, and assesses the variability of the Tay discharge over the 60‐year period covered. Unprecedented winter, spring and flood flows in the late 1980s/1990s are reported, in the context of improving the understanding of hydroclimatic variability.