From Angela's Ashes to the Celtic Tiger: Early Life Conditions and Adult Health in Ireland

We use data from the Irish census and exploit regional and temporal variation in infant mortality rates over the 20th century to examine effects of early life conditions on later life health. Our main identification is public health interventions which eliminated the Irish urban infant mortality penalty. Estimates suggest that a unit decrease in mortality rates at time of birth reduces the probability of being disabled as an adult by between .03 and .05 percentage points. We find that individuals from lower socio economic groups had marginal effects of reduced infant mortality twice as large as those at the top.childhood health, disability

Exporting Poor Health: The Irish in England

The Irish-born population in England is in worse health than both the native population and the Irish population in Ireland, a reversal of the commonly observed healthy migrant effect. Recent birth-cohorts living in England and born in Ireland, however, are healthier than the English population. The substantial Irish health penalty arises principally for cohorts born between 1920 and 1960. This paper attempts to understand the processes that generated this migrant health pattern. Our results suggest a strong role for early childhood conditions and economic selection in driving the dynamics of health differences between the Irish-born migrants and White English populations.

Interplanetary Ridesharing: Exploring Potential CubeSat Trajectories

Ever since the revolutionary CubeSat form factor took hold in the Aerospace industry, there has been a desire to send them further and further into space. This thesis introduces an optimization approach to deployment that explores new possibilities of interplanetary CubeSats. In this approach there are three categories of objective functions that are defined by the type of trajectory of a “primary” spacecraft, which carries the CubeSat deployer. These categories are flyby, orbiter, and lander. For each category the objective function starts with four design variables. These are the ΔV of the deployer broken up into three component directions and the true anomaly at the time of deployment. The method then calculates the mission specific objective to be minimized and uses Matlab®’s built in gradient-based optimizer, fmincon. The results show that in the flyby category, the CubeSat has a significantly different turning angle than the primary. The CubeSat can even flyby on the opposite side of the planet. In the orbiter case it is shown that the method works by testing it with two objective functions, the difference in inclination and the difference in eccentricity between the primary and the CubeSat. It is shown that the inclination can be changed by 0.1314° and the eccentricity can be changed by 0.0033. These values, although low in magnitude, are an order of magnitude greater than non-optimal deployment scenarios. Still, another optimization method is introduced to find out how much extra ΔV the CubeSat would need to reach a desired change. This shows that with just an extra 75 m/s of ΔV, the CubeSat can change its orbit by 5°. This could come from either a propulsion system or a modified deployer. The final category, lander, used the flight path angle when entering the atmosphere as an objective. The method shows that flight path angle can be changed by 2.6°. Overall, these examples have proven that the method can find optimal solutions to CubeSat deployment scenarios at other planets

Assimilating the Martian water cycle

Water ice clouds have been shown to alter the thermal structure of the Martian atmosphere. Here we discuss the assimilation of total column water vapour and dust optical depth data from the Thermal Emission Spectrometer (TES) into the UK/LMD MGCM, and compare the predictions of cloud and temperature in the assimilation with observations

Acquiring Human Capital through the Generations by Migration

Our focus will be on the role of migration to the United States from a set of important European sending countries as a device for improving the human capital of the children and grandchildren of migrants as measured by their education. In this paper, we derive a new and conceptual more appropriate measure of the generational gains in schooling attributable to migration by taking into account the correct counter-factual the generational education gains that would have taken place if these migrants had remained in their sending countries. We find that the two European countries where the descendants gained the most in terms of human capital are Italy and Poland