A discourse on natural religion: delivered in the chapel of the University in Cambridge, September 3r, 1795, at the lecture founded by the Honourable Paul Dudley, Esqr

The hand-sewn notebook contains a manuscript draft of the Dudleian lecture delivered by Thomas Barnard on September 3, 1795 at Harvard College. The sermon begins with the Biblical text Acts 14-57. The copy includes a small number of edits and struck-out words. The covers are no longer with the item.

Investigating the potential magnetic origin of wind variability in OB stars

In this thesis, the origin of large-scale structures in hot star winds, believed to be responsible for the presence of discrete absorption components (DACs) in the absorption troughs of ultraviolet resonance lines, is constrained using both observations and numerical simulations. These structures are understood as arising from bright regions on the stellar surface, although their physical cause remains unknown. First, we use high quality circular spectropolarimetric observations of 13 well-studied OB stars to evaluate the potential role of dipolar magnetic fields in producing DACs. We perform longitudinal field measurements and place limits on the field strength using Bayesian inference, assuming that it is dipolar. No magnetic field was detected within this sample. The derived constraints statistically refute any significant dynamical influence from a magnetic dipole on the wind for all of these stars, ruling out such fields as a cause for DACs. Second, we perform numerical simulations using bright spots constrained by broadband optical photometric observations. We calculate hydrodynamical wind models using three sets of spot sizes and strengths. Co-rotating interaction regions are yielded in each model, and radiative transfer shows that the properties of the variations in the UV resonance lines synthesized from these models are consistent with those found in observed UV spectra, establishing the first consistent link between UV spectroscopic line profile variability and photometric variations and thus supporting the bright spot paradigm (BSP). Finally, we develop and apply a phenomenological model to quantify the measurable effects co-rotating bright spots would have on broadband optical photometry and on the profiles of photopheric lines in optical spectra. This model can be used to evaluate the existence of these spots, and, in the event of their detection, characterize them. Furthermore, a tentative spot evolution model is presented. A preliminary analysis of its output, compared to the observed photometric variations of xi Persei, suggests the possible existence of “active longitudes” on the surface of this star. Future work will expand the range of observational diagnostics that can be interpreted within the BSP, and link phenomenology (bright spots) to physical processes (magnetic spots or non-radial pulsations).

Wind Shear, Gust, and Yaw-Induced Dynamic Stall on Wind-Turbine Blades

This study examined the effect of a spanwise angle of attack gradient on the growth and stability of a dynamic stall vortex in a rotating system. It was found that a spanwise angle of attack gradient induces a corresponding spanwise vorticity gradient, which, in combination with spanwise flow, results in a redistribution of circulation along the blade. Specifically, when modelling the angle of attack gradient experienced by a wind turbine at the 30% span position during a gust event, the spanwise vorticity gradient was aligned such that circulation was transported from areas of high circulation to areas of low circulation, increasing the local dynamic stall vortex growth rate, which corresponds to an increase in the lift coefficient, and a decrease in the local vortex stability at this point. Reversing the relative alignment of the spanwise vorticity gradient and spanwise flow results in circulation transport from areas of low circulation generation to areas of high circulation generation, acting to reduce local circulation and stabilise the vortex. This circulation redistribution behaviour describes a mechanism by which the fluctuating loads on a wind turbine are magnified, which is detrimental to turbine lifetime and performance. Therefore, an understanding of this phenomenon has the potential to facilitate optimised wind turbine design.

Turkey's boycott of the Cyprus EU presidency: context, meaning and its consequences. EU Centre in Singapore Working Paper No. 9, September 2012

In 2011 Turkish officials began indicating their intention to suspend all contact with Cyprus’s presidency of the Council of the European Union (EU), slated for the second half of 2012, given the issues surrounding the unresolved Cyprus conflict. This came as the latest development in a long and arduous path of Turkey’s application for EU membership that began in 1987. This paper provides the context – the Cyprus conflict, Turkey’s EU accession negotiations, and the Cyprus reunification talks – in understanding the reasons and consequences of Ankara’s boycott of the Cyprus presidency. The article also considers the evolving nature and the role of the rotating presidency of the Council of the EU, especially after the implementation of the Lisbon Treaty, and how this may have played into Turkey’s calculations in calling for the boycott.

The Cyprus Presidency: Pragmatism amid European anxiety. CEPS Commentary, 24 January 2013

Despite several daunting obstacles, the low expectations and the high level of apprehension that accompanied the start of the Cyprus Presidency, Thomas Linders and Steven Blockmans find in a new CEPS Commentary that the small, remote and politically divided island nevertheless succeeded in scoring a number of positive results, thanks in part to the country’s pragmatic approach to the job and the perpetual motion of the EU legislature. As a corrective instrument to big state politics in the EU, however, the role of the Presidency remains limited. This underscores the changed nature of the rotating Presidency of the the Council of the EU since the Lisbon Treaty entered into force. Despite several daunting obstacles, the low expectations and the high level of apprehension that accompanied the start of the Cyprus Presidency, this CEPS Commentary by Thomas Linders and Steven Blockmans expresses surprise that the small, remote and politically divided island succeeded in scoring a number of positive results at all, thanks in part to the country’s pragmatic approach to the job

(Bio)funcionalização de superfícies nanoestruturadas para eletrocatálise e desenvolvimento de biossensores eletroquímicos e óticos

Tese de doutoramento, Química (Química Física), Universidade de Lisboa, Faculdade de Ciências, 2016

The Lisbon Treaty and Spain: Background, Context and Impact. Jean Monnet/Robert Schuman Paper Series Special Issue 1, August 2012

The year 2010 will be remembered in the European Union (EU) circles of governmental Spain as a crucial milestone regarding the role of the country in one of the most important alliances of world history. During the first semester, from January to June 2010, Spain had previously been scheduled to hold the rotating presidency as done since the times of the inception of the predecessor of the EU, the European Economic Community (EEC). Furthermore, on June 12, Spain would be ready to celebrate the 25th anniversary of its adhesion (along with Portugal) to the European integration experiment, by signing the treaty, effectively acceding to the European Community (EC) on January 1, 1986. While all of this was set to occur, the new Reform Treaty (“of Lisbon”) was set to be implemented as a substitute for the failed constitutional text floated during the first years of the new century. Moreover, these spectacular events unraveled in the middle of one of the worst economic crises of the world, with considerable impact on the evolution of the EU and, most especially, Spain. This paper will review the background, context and impact of particular novel aspects of the new treaty governing the EU and several milestones regarding the experience of Spain in the European process.

Exceeding expectations, Lithuania moves the Trio presidency forward. CEPS Commentary, 22 January 2014

Lithuania assumed its maiden term running the rotating Presidency of the Council in the 2nd half of 2013 under difficult constraints: the country’s modest administrative capacities and the enormous time pressures brought on by the urgency of certain dossiers and the abbreviated term of the current Parliament, which ends in mid-April. Nevertheless, as assessed by Sonia Piedrafita and Vilde Renman in this new CEPS Commentary, substantial progress was made thanks to the perseverance and strenuous efforts by the Lithuanians. In the end, some 137 legal acts were adopted during its six-month term, including several highly sensitive and complex pieces of legislation. The overall success was only slightly marred by the haste with which a few agreements were negotiated.

Shifting EU Institutional Reform into High Gear. Report of the CEPS High-Level Group. CEPS Task Force Reports

To contribute to the important debate on EU institutional reform in the run-up to the European Parliament elections and the start of a new Commission, CEPS formed a High-Level Group on EU Institutional Reform under the leadership of Danuta Hübner MEP and member of the CEPS Board of Directors. The report of this distinguished group of MEPs, former and current EU institutional members and leading scholars on EU law and institutional affairs focuses on reforms that could be taken within the framework of the current treaties to build a more responsive and accountable Union. The report analyses the main inter- and intra-institutional weaknesses in terms of efficiency, democracy and differentiation and puts forward a number of recommendations addressing issues such as the reorganisation of the College of Commissioners, the promotion of strategic legislative planning, the enhancement of the role of the EP and the rotating Presidency of the Council, the improvement of the democratic accountability of the European Council and the adequate engagement of the national parliaments.

Defying the Treaty: The Influence of the Polish and Lithuanian Council Presidencies on the Development of the Eastern Partnership. EU Diplomacy Paper No. 6, October 2014

Many scholars now argue that the Treaty of Lisbon has removed the role and influence of the rotating Council Presidency in the domain of the European Union’s foreign affairs. This paper will, however, go beyond a superficial, treaty-based analysis of the influence of the post-Lisbon rotating Council Presidency and instead look at two primary, residual, informal Presidential roles, namely agenda-shaping and brokering. It will examine the extent to which these informal roles allowed the Polish and Lithuanian Council Presidencies of July to December 2011 and 2013 respectively to influence the development of the bilateral, multilateral and internal tracks of the Eastern Partnership. The paper will argue that the considerable influence of these rotating Presidencies defied the logic of the Lisbon Treaty, suggesting that the ‘golden age’ of this six-month position, whereby individual Member States pursue foreign policy issues of significant domestic interest at the European level, has not yet passed.

Some reflections on the results and the working methods of the Belgian EU-Presidency in 2010. European Policy Brief No. 11, June 2012

In this Policy Brief, Belgian diplomat Willem Van de Voorde offers his hands-on view on the Belgian EU-Presidency in 2010; including the key lessons of this post-Lisbon Treaty “new style” rotating presidency. He argues that despite the major implications of the Lisbon Treaty, notably the new permanent President of the European Council, the rotating presidency can still play a central role in the EU decision-making process.