Direct nanofiltration of wastewater treatment plant effluent

Membrane technology, especially nanofiltration, is seen as a suitable technology to polish WWTP effluent to EU WFD standards and consequently produce an effluent quality suitable for agricultural or (in)direct potable usage. The objective of this study was to assess the potential of direct nanofiltration as technique for effluent reclamation

Convergence in a Dynamic Heckscher–Ohlin Model with Land

Convergence among nations that share the same preferences and technologies is a key result of the closed-economy neoclassical growth framework that has received substantial support in the data. However, Heckscher–Ohlin versions of the two-sector neoclassical growth model predict that nations that differ in their capital–labor ratios may not converge to the same steady state, even if they are identical in all other aspects. This is a puzzling result that warns us about potential dangers of international trade. In this paper we show that when land, an input in fixed supply, is introduced into the model, international trade in goods no longer limits the capacity of poor nations to catch up with the advanced world.The authors are grateful to the Spanish Ministry of Science and Innovation (ECO2012-36719) and the Generalitat Valenciana (PROMETEO/2013/037) for financial support

Convergence in a dynamic Heckscher–Ohlin model with land

Convergence among nations that share the same preferences and technologies is a key result of the closed-economy neoclassical growth framework that has received substantial support in the data. However, Heckscher–Ohlin versions of the two-sector neoclassical growth model predict that nations that differ in their capital–labor ratios may not converge to the same steady state, even if they are identical in all other aspects. This is a puzzling result that warns us about potential dangers of international trade. In this paper we show that when land, an input in fixed supply, is introduced into the model, international trade in goods no longer limits the capacity of poor nations to catch up with the advanced world

Orion Launch Abort System Performance During Exploration Flight Test 1

The Orion Launch Abort System Office is taking part in flight testing to enable certification that the system is capable of delivering the astronauts aboard the Orion Crew Module to a safe environment during both nominal and abort conditions. Orion is a NASA program, Exploration Flight Test 1 is managed and led by the Orion prime contractor, Lockheed Martin, and launched on a United Launch Alliance Delta IV Heavy rocket. Although the Launch Abort System Office has tested the critical systems to the Launch Abort System jettison event on the ground, the launch environment cannot be replicated completely on Earth. During Exploration Flight Test 1, the Launch Abort System was to verify the function of the jettison motor to separate the Launch Abort System from the crew module so it can continue on with the mission. Exploration Flight Test 1 was successfully flown on December 5, 2014 from Cape Canaveral Air Force Station's Space Launch Complex 37. This was the first flight test of the Launch Abort System preforming Orion nominal flight mission critical objectives. The abort motor and attitude control motors were inert for Exploration Flight Test 1, since the mission did not require abort capabilities. Exploration Flight Test 1 provides critical data that enable engineering to improve Orion's design and reduce risk for the astronauts it will protect as NASA continues to move forward on its human journey to Mars. The Exploration Flight Test 1 separation event occurred at six minutes and twenty seconds after liftoff. The separation of the Launch Abort System jettison occurs once Orion is safely through the most dynamic portion of the launch. This paper will present a brief overview of the objectives of the Launch Abort System during a nominal Orion flight. Secondly, the paper will present the performance of the Launch Abort System at it fulfilled those objectives. The lessons learned from Exploration Flight Test 1 and the other Flight Test Vehicles will certainly contribute to the vehicle architecture of a human-rated space launch vehicle

Labour status and involuntary employment: family ties and part-time work in Spain

The aim of the paper is a gender analysis of the extent to which part-time work represents an individual’s preferred labor market situation. The work includes a theoretical model that delivers some predictions about the household’s preferences over non-chosen employment states. Furthermore, it explores the impact of individual, family and job related variables on the probabilities of involuntary and voluntary part-time employment in Spain. The main empirical findings of the paper are: first, the model is sensitive to the chosen definition of (voluntary) part-time employment; second, there exist important gender asymmetries in labour market behaviour concerning the importance of the individual’s education and family characteristics; third, the marital status and having small children are important determinants of a woman’s probability of being voluntary part-time employed, whereas having grown up children or a temporary contract increases significantly a woman’s probability of involuntary part-time employment.Financial support from the Spanish Ministerio de Ciencia y Tecnología and Feder Funds under project SEJ-2007-62656

Neoclassical growth and the natural resource curse puzzle

We advance a novel mechanism that helps to explain the puzzling evidence on the natural resource curse. The new channel arises in a standard dynamic Heckscher-Ohlin model composed of small-open economies that take international output prices as given. Within this framework, a more capital-intensive primary sector implies that natural-resource abundant economies grow more slowly along the adjustment path. This effect might be only temporary because the natural input also affects long-run income, and not necessarily in the same direction as transitional growth. We produce quantitative results that show that the new mechanism can account for a significant fraction of the observed output growth gap between resource rich and resource poor U.S. states

Un recueil parisien de psaumes, de chansons spirituelles et de motets (ca. 1565) : Genève BGE Ms. Mus. 572.

International audienceStudy of the musical manuscript MS MUS 572, Bibliothèque de Genève. This volume, of Parisian origin, is written around 1567 and contains psalms (translated by Marot and Bèze), spiritual songs and motets. Although the binding ornementation and its monogram has been studied in detail, irs precise provenance could not be established. Some clus couls indicate it come from the entourage of Jean II Brinon.Cette étude étudie le MS MUS 572 de la Bibliothèque de Genève, manuscrit parisien d'environ 1567 qui contient des psaumes de Marot et Bèze tant homophoniques qu'en forme de motets, des chansons spirituelles et des motets. Malgré une étude approfondie des fers et du monogramme de la reliure, son propriétaire n'a pu être identifié, encore que certains indices incitent à le situer dans la mouvance de Jean II Brinon

Off-line compensation of the tool path deviations on robotic machining : Application to incremental sheet forming

International audienceIn this paper, a coupling methodology is involved and improved to correct the tool path deviations induced by the compliance of industrial robots during an incremental sheet forming task. For that purpose, a robust and systematic method is first proposed to derive the elastic model of their structure and an efficient FE simulation of the process is then used to predict accurately the forming forces. Their values are then defined as the inputs of the proposed elastic model to calculate the robot TCP pose errors induced by the elastic deformations. This avoid thus a first step of measurement of the forces required to form a test part with a stiff machine. An intensive experimental investigation is performed by forming a classical frustum cone and a non-symetrical twisted pyramid. It validates the robustness of both the FE analysis and the proposed elastic modeling allowing the final geometry of the formed parts to converge towards their nominal specifications in a context of prototyping applications