Stability of Short-span Bridges Subject to Overtopping during Floods: Case Studies from UK and the USA

As a consequence of increased levels of flooding, largely attributable to urbanization of watersheds (and perhaps climate change, more frequent extreme rainfall events are occurring and threatening existing critical infrastructure. Many of which are short-span bridges over relatively small waterways (e.g., small rivers, streams and canals). Whilst these short-span bridges were designed, often many years ago, to pass relatively minor the then standard return-period floods, in recenttimes the failure incidence of such short-span bridges has been noticeably increasing. This is suggestive of insufficient hydraulic capacity or alternative failure mechanism not envisaged at the time of design e.g. foundation scour or undermining. This paper presen ts, and draws lessons, from bridge failures in Ireland and the USA. For example, in November 2009, the UK and Ireland were subjected to extraordinarily severe weather conditions for several days. The resulting flooding led to the collapse of three UK bridges that were generally 19th century masonry arch bridges, withrelatively shallow foundations. Parallel failure events have been observed in the USA. To date, knowledge of the combined effect of waterway erosion, bridge submergence, and geotechnical collapse has not been adequately studied. Recent research carried out considered the hydraulic analysis of short span bridges under flood conditions, but no consideration was given towards the likely damage to these structures due to erosive coupling of hydraulic and geotechnical factors. Some work has been done to predict the discharge downstream of an inundated arch, focusing onpredicting afflux, as opposed to bridge scour, under both pressurized and free-surface flows, but no ! predictive equation for scour under pressurized conditions was ever considered. The case studies this paper presents will be augmented by the initial findings from the laboratory experiments investigating the effects of surcharged flow and subsequent scour within the vicinity of single span arch bridges. Velocities profiles will be shown within the vicinity of the arch, in addition to the depth of consequent scour, for a series of flows and model spans. The data will be presented and correlated to the most recent predictive equations for submerged contraction and abutment scour. The accuracy of these equations is examined, and the findings used as a basis for developing further studies in relation to short span bridges.

Financialisation, income distribution and aggregate demand in the USA

This paper investigates the effects of financialisation and functional income distribution on aggregate demand in the USA by estimating the effects of the increase in rentier income (dividends and interest payments) and housing and financial wealth on consumption and investment. The redistribution of income in favour of profits suppresses consumption, whereas the increase in the rentier income and wealth has positive effects. A higher rentier income decreases investment. Without the wealth effects, the overall effect of the changes in distribution on aggregate demand would have been negative. Thus a pro-capital income distribution leads to a slightly negative effect on growth, i.e. the USA economy is moderately wage-led.

The patent expiry as a major inflection point in a branded Rx drug's life and strategies to counter generic competition - exemplified at Pfizer's blockbuster drug Lipitor in the USA

A large number of expensive, but highly profitable branded prescription drugs will go off-patent in the USA between 2011 and 2015. Their revenues are crucial to fund the immense costs associated with the development of an innovative drug. The rising cost pressure on pharmaceutical stakeholders has increased the demand for more affordable medications, as provided by the branded drug's generic counterpart. Yet, research based incumbents are moving beyond the traditional late lifecycle strategies and deploy more aggressive tactics in order to protect their brands, as seen with Pfizer's Lipitor!. It is doubtful, whether these efforts will help the blockbuster business model to resist current market conditions.

Effects of quantitative easing on the USA economy: A test for policy effectiveness

The catastrophic disruption in the USA financial system in the wake of the financial crisis prompted the Federal Reserve to launch a Quantitative Easing (QE) programme in late 2008. In line with Pesaran and Smith (2014), I use a policy effectiveness test to assess whether this massive asset purchase programme was effective in stimulating the economic activity in the USA. Specifically, I employ an Autoregressive Distributed Lag Model (ARDL), in order to obtain a counterfactual for the USA real GDP growth rate. Using data from 1983Q1 to 2009Q4, the results show that the beneficial effects of QE appear to be weak and rather short-lived. The null hypothesis of policy ineffectiveness is not rejected, which suggests that QE did not have a meaningful impact on output growth.

The Vintners Quality Alliance - VQA Officially Launches its "Appellation of Origin" System for Ontario Wines, June 27 1989

An official launch for the '"Appellation of Origin" System for Ontario Wines'. The VQA announces the labeling system which will identify "Ontario wines based on the origin of the grapes from which they are produced". The system relies on Provincial and Geographic Designations which are outlined in the announcement.

Lives of the heroes of the American Revolution: comprising the lives of Washington and his Generals and Officers who were the most distinguished in the war of the Independence of the USA.

UANL

Compositional data analysis of vote shares in the 2001 Australian Federal election

First application of compositional data analysis techniques to Australian election data

Edexcel GCSE history A : the making of the modern world. Unit 2C : the USA 1919-41. Student book.

Es una de las cuatro unidades del curso de preparación para los exámenes del General Certificate Secondary Education (GCSE). Estos temas explican los acontecimientos históricos sucedidos en los últimos cien años y ayudan a entender los problemas del mundo actual. Esta unidad trata los cambios ocurridos Estados Unidos en el período comprendido entre el final de la Primera Guerra Mundial y el principio de la Segunda Guerra Mundial, caracterizado por un boom económico seguido de una depresión y la elección de un nuevo presidente con nuevas políticas para resolver la crisis. Una parte del libro se dedica al repaso y la preparación del examen.

Edexcel GCSE history A : the making of the modern world. Unit 3C : a divided union? : the USA 1945-70. Student book.

Es una de las cuatro unidades del curso de preparación para los exámenes del General Certificate Secondary Education (GCSE). Esta unidad 3 es diferente de las dos unidades anteriores pues sus temas se basan en comprender la importancia de las fuentes en el estudio de la historia y como pueden ser interpretadas de varias maneras, lo que lleva a los historiadores a emitir juicios sobre la utilidad y fiabilidad de la información que proporcionan. Asimismo, se explica que en esta parte del examen del GCSE se conjugan los conocimientos y la información sobre los hechos con los juicios sobre las fuentes históricas.

Prosperity, depression and the New Deal : the USA 1890-1954.

Su contenido se adapta a los temas de las especificaciones AS y A2 para las especificaciones de AQA y Edexcel. Repasa el sistema político del país, el período de 1890 a 1920 y analiza los motivos de la entrada de los Estados Unidos en la Primera Guerra Mundial. Estudia la situación de aparente estabilidad económica de la década de 1920 y la devastación producida por la Gran Depresión,las políticas del New Deal, el optimismo bajo la presidencia de Roosevelt y el impacto de la Segunda Guerra Mundial.

African-american civil rights in the USA.

Recurso que ayuda a los estudiantes a preparar, analizar, interpretar y evaluar los temas de historia del nivel AS/A y que estudia la lucha de los afro-americanos para lograr la igualdad en los últimos 150 años. En el capítulo 1 se estudian los puntos de vistas más comunes sobre el movimiento de los derechos civiles; en el capítulo 2 se señalan los antecedentes de este movimiento y se examina la segregación de los afroamericanos en los estados del sur de Estados Unidos; en el capítulo 3 se analiza el papel jugado por las dos guerras mundiales en la transformación del contexto del movimiento de los derechos civiles, así como la aparición de las primeras organizaciones que desafiaban la segregación en el sur. Los capítulos 4 y 5 prestan atención a los retos de la discriminación después de 1945; en el capítulo 6 se describe el éxito del movimiento por los derechos civiles entre 1963 y 1965 y la eliminación, a fines de 1965, en los estados del sur de la política segregacionista. Po último, el capítulo 7 analiza el legado de este movimiento y los logros conseguidos desde 1965.

Civil rights in the USA, 1865-1992.

Cumple con los requisitos para OCR A2 de Historia, unidad F961 Opción B y su contenido se divide en cuatro secciones, cada una de las cuales explica un aspecto del desarrollo de los derechos civiles en Estados Unidos en este período: derechos de los afro-americanos, derechos laborales, derechos de los nativos y derechos de las mujeres. Incluye una selección y definición de los temas, conceptos, acontecimientos y lugares considerados relevantes, así como breves biografías de personajes clave y consejos para los exámenes.