Analysis of Combined Bending and Punching Tests of Reinforced Concrete Slabs within IMPACT III Project

The paper reports on a collaborative effort between the Swiss Federal Nuclear Safety Inspectorate (ENSI) and their consultants Principia and Stangenberg. As part of the IMPACT III project, reduced scale impact tests of reinforced concrete structures were carried out. The simulation of test X3 is presented here and the numerical results are compared with those obtained in the test, carried out in August 2013. The general object is to improve the safety of nuclear facilities and, more specifically, to demonstrate the capabilities of current simulation techniques to reproduce the behaviour of a reinforced concrete structure impacted by a soft missile. The missile is a steel tube with a mass of 50 kg and travelling at 140 m/s. The target is a 250 mm thick, 2,1 m by 2,1 m reinforced concrete wall, held in a stiff supporting frame. The reinforcement includes both longitudinal and transverse rebars. Calculations were carried out before and after the test with Abaqus (Principia) and SOFiSTiK (Stangenberg). In the Abaqus simulation the concrete is modelled using solid elements and a damaged plasticity formulation, the rebars with embedded beam elements, and the missile with shell elements. In SOFiSTiK the target is modelled with non-linear, layered shell elements for the reinforcement on both sides; non-linear shear deformations of shell/plate elements are approximately included. The results generally indicate a good agreement between calculations and measurements.

Temperature and precipitation effects on wheat yield across a European transect: a crop model ensemble analysis using impact response surfaces

This study explored the utility of the impact response surface (IRS) approach for investigating model ensemble crop yield responses under a large range of changes in climate. IRSs of spring and winter wheat Triticum aestivum yields were constructed from a 26-member ensemble of process-based crop simulation models for sites in Finland, Germany and Spain across a latitudinal transect. The sensitivity of modelled yield to systematic increments of changes in temperature (-2 to +9°C) and precipitation (-50 to +50%) was tested by modifying values of baseline (1981 to 2010) daily weather, with CO2 concentration fixed at 360 ppm. The IRS approach offers an effective method of portraying model behaviour under changing climate as well as advantages for analysing, comparing and presenting results from multi-model ensemble simulations. Though individual model behaviour occasionally departed markedly from the average, ensemble median responses across sites and crop varieties indicated that yields decline with higher temperatures and decreased precipitation and increase with higher precipitation. Across the uncertainty ranges defined for the IRSs, yields were more sensitive to temperature than precipitation changes at the Finnish site while sensitivities were mixed at the German and Spanish sites. Precipitation effects diminished under higher temperature changes. While the bivariate and multi-model characteristics of the analysis impose some limits to interpretation, the IRS approach nonetheless provides additional insights into sensitivities to inter-model and inter-annual variability. Taken together, these sensitivities may help to pinpoint processes such as heat stress, vernalisation or drought effects requiring refinement in future model development.

Low key but not low impact: the results of the EU's 'transition' summit. EPC Post-Summit Analysis, 27 October 2014

The European Council Summit of 23-24 October 2014 may have been relatively low key, but many important decisions were made which could encourage historical changes. In this post-summit analysis, Janis A. Emmanouilidis examines the agreement reached on a new climate and energy policy framework for 2020-2030 which despite falling short of the European Commission’s original proposals, it nevertheless delivers a positive message to international community ahead of the global climate negotiations next year. He also highlights the significance of the request from euro-zone leaders for a new report on ‘better economic governance’ by December. More broadly, he uses this moment of transition in the EU’s leadership to analyse the current state and future direction of the Union, and underlines the need to provide a coherent and holistic response to the damage caused by the crisis and the challenges facing the Union, on the basis of an ambitious but pragmatic ‘package deal’ – a new pact between EU governments, and between the Union and its citizens – to heal the divisions of recent years and restore public faith in the benefits of EU membership.

Scaling Social Impact in Europe: Quantitative Analysis of National and Transnational Scaling Strategies of 358 Social Enterprises

A wide variety of different socially motivated organisations perform exceptional feats in alleviating societal ills using creativity and entrepreneurial spirit in their quest to scale their social impact. Their focus is seldom limited to one specific region – instead they strive to benefit the largest possible number of people, thereby often transcending national borders. After all, societal issues usually don’t stop at a countries’ borders – why then should good ideas and impactful concepts aimed at solving these issues? For many socially motivated organisations, the goal of disseminating their social impact remains a solemn wish due to lacking experience and know-how of how to plan and conduct systematic scaling.

WGTTEST: Stata module to test the impact of sampling weights in regression analysis

wgttest performs a test proposed by DuMouchel and Duncan (1983) to evaluate whether the weighted and unweighted estimates of a regression model are significantly different.

An analysis of motorcycle side impact. Interim report of test results.

National Highway Traffic Safety Administration, Washington, D.C.

School feeding programs in developing countries : an analysis of actual and potential impact /

"PN-AAL-060"--Cover.

An economic analysis of the environmental impact of highway deicing /

Mode of access: Internet.

San Antonio Alcohol Safety Action Project - analytic study no. 1-2: final analysis of overall project impact - 1972 through 1974. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

An analysis of ASAP impact on the judicial system. SD:ASAP analytic study no. 4 - 1976. Final report.

National Highway Traffic Safety Administration, Office of Driver and Pedestrian Programs, Washington, D.C.