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standardization
Ground models; a brief overview
Interpreting and reporting 40 Ar/ 39 Ar geochronologic data
Refinement of Sampling and Analysis Techniques for Asbestos in Soil
Effect of depositional water content on the collapsibility of a reconstituted loess
Are Three to Ten Tests Enough to Characterize a Rock Property?
Update to the South African Stratigraphic Code and Guidelines for Standardised Lithostratigraphic/Lithodemic Descriptions
Reviewing the bases for a nomenclatural uniformization of the highest taxonomic levels in arthropods
The engineering geology of concrete in hot drylands
A Collection of Historic Seismic Instrumentation Photographs at the Albuquerque Seismological Laboratory
GEOTRACES DATA PRODUCTS: STANDARDISING AND LINKING OCEAN TRACE ELEMENT AND ISOTOPE DATA AT A GLOBAL SCALE
‘Uniformity in Geological Reports’ (1917) by Josef Theodor Erb, petroleum geologist and manager (1874–1934)
Abstract One hundred years ago, standards in geological report writing were formalized within the Royal Dutch Shell Group. Chief Geologist Josef Theodor Erb defined these standards in an internal report aimed at geologists working for Shell subsidiaries. His purpose was to raise the level of scientific reporting and to provide a measure of uniformity in geological reports sent to head office from all parts of the world. Ultimately, ‘Uniformity in Geological Reports’ was to allow the chief geologist to readily identify and follow-up on the better business opportunities. With time, Erb’s report developed into the Shell ‘Standard Legend’. Erb’s career is symptomatic of a developing company culture, which he embraced as his life’s goal. Realizing the shortcomings of this narrow personal philosophy of life may have been at the root of the mental problems that led to his death.
Three-dimensional geostatistical integration of borehole and geophysical datasets in developing geological unit boundaries for geotechnical investigations
An investigation into premium and marginal pavement aggregates from New Zealand
Standards and quality in ground investigation; squaring the circle
Standardized terminology and test methods for sulphur mineral phases for the assessment of construction materials and aggressive ground
A Comparison of Surface- and Standard Penetration Test-Derived Shear-Wave Velocity
Abstract Prediction of the emplacement of volcanic mass flows (lava flows, pyroclastic density currents, debris avalanches and debris flows) is required for hazard and risk assessment, and for the planning of risk-mitigation measures. Numerical computer-based models now exist that are capable of approximating the motion of a given volume of volcanic material from its source to the deposition area. With these advances in technology, it is useful to compare the various codes in order to evaluate their respective suitability for real-time forecasting, risk preparedness and post-eruptive response. A ‘benchmark’ compares codes or methods, all aimed at simulating the same physical process using common initial and boundary conditions and outputs, but using different physical formulations, mathematical approaches and numerical techniques. We set up the basis for a future general benchmarking exercise on volcanic mass-flow models and, more specifically, establish a benchmark series for computational lava-flow modelling. We describe a set of benchmarks in this paper, and present a few sample results to demonstrate output analysis and code evaluation methodologies. The associated web-based communal facility for sharing test scenarios and results is also described.
Conclusion: recommendations and findings of the RED SEED working group
Abstract RED SEED stands for Risk Evaluation, Detection and Simulation during Effusive Eruption Disasters, and combines stakeholders from the remote sensing, modelling and response communities with experience in tracking volcanic effusive events. The group first met during a three day-long workshop held in Clermont Ferrand (France) between 28 and 30 May 2013. During each day, presentations were given reviewing the state of the art in terms of (a) volcano hot spot detection and parameterization, (b) operational satellite-based hot spot detection systems, (c) lava flow modelling and (d) response protocols during effusive crises. At the end of each presentation set, the four groups retreated to discuss and report on requirements for a truly integrated and operational response that satisfactorily combines remote sensors, modellers and responders during an effusive crisis. The results of collating the final reports, and follow-up discussions that have been on-going since the workshop, are given here. We can reduce our discussions to four main findings. (1) Hot spot detection tools are operational and capable of providing effusive eruption onset notice within 15 min. (2) Spectral radiance metrics can also be provided with high degrees of confidence. However, if we are to achieve a truly global system, more local receiving stations need to be installed with hot spot detection and data processing modules running on-site and in real time. (3) Models are operational, but need real-time input of reliable time-averaged discharge rate data and regular updates of digital elevation models if they are to be effective; the latter can be provided by the radar/photogrammetry community. (4) Information needs to be provided in an agreed and standard format following an ensemble approach and using models that have been validated and recognized as trustworthy by the responding authorities. All of this requires a sophisticated and centralized data collection, distribution and reporting hub that is based on a philosophy of joint ownership and mutual trust. While the next chapter carries out an exercise to explore the viability of the last point, the detailed recommendations behind these findings are detailed here.
Inadequacy of different methods of assessing the correct dosages during the preparation of air-hardening lime mortars
Abstract This work highlights the importance of applying suitable methods for the design of air-hardening lime mortars with the correct water dosage and binder-to-aggregate ratios. To this end, the recently developed ‘wet packing method’ has been used to assess the optimum water-to-binder ratio at which the packing density is achieved in lime mortars with different binder-to-aggregate proportions. To support the validity of this method, it has been compared with other standardized methods of determining the bulk density of the dry granular components and the consistency of the mortar pastes. The reliability of the wet packing method has then been verified by studying the mineralogical, textural and mechanical properties of mortars after 2 and 6 months of carbonation. Results showed that although the wet packing method seems to be more realistic than the majority of standards used for the determination of the packing density and workability in granular mixtures, it is not totally suitable for the preparation of air-hardening lime mortars with good performances in the fresh and hardened state.