Discussing the physical meaning of the absorption feature at 2.1 keV in 4U 1538–52

High resolution X-ray spectroscopy is a powerful tool for studying the nature of the matter surrounding the neutron star in X-ray binaries and its interaction between the stellar wind and the compact object. In particular, absorption features in their spectra could reveal the presence of atmospheres of the neutron star or their magnetic field strength. Here we present an investigation of the absorption feature at 2.1 keV in the X-ray spectrum of the high mass X-ray binary 4U 1538–52 based on our previous analysis of the XMM-Newton data. We study various possible origins and discuss the different physical scenarios in order to explain this feature. A likely interpretation is that the feature is associated with atomic transitions in an O/Ne neutron star atmosphere or of hydrogen and helium like Fe or Si ions formed in the stellar wind of the donor.

" Know then thyself, presume not God to scan, the proper study of mankind is man" : commencement essay, 1793

One-page sheet with handwritten essay titled, "Know then thyself, presume not God to scan, The proper study of mankind is man," composed by graduate Ward Cotton for the July 17, 1793 Harvard University Commencement. The essay begins with the quote "'Man is a being composed of an organized body, and a rational soul.'"

Boston proper, Massachusetts, 1895, showing historic shorelines (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Plan of Boston proper : showing changes in street and wharf lines, 1795 to 1895, by Charles C. Perkins, Jan. 31st, 1895. It was printed by Geo. H. Walker, lith., for the Boston (Mass.). Engineering Dept. Annual report of the City Engineer, 1895. Scale [ca. 1:4,800]. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Massachusetts State Plane Coordinate System, Mainland Zone (in Feet) (Fipszone 2001). All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, or other information associated with the principal map. This map shows Boston proper's original shoreline and changes in wharf line for years 1795, 1850 and 1895. It also shows early streets with later changes and discontinued streets. It includes features such as roads, railroads, drainage, wharves, some public buildings, parks, and more. This layer is part of a selection of digitally scanned and georeferenced historic maps of Massachusetts from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of regions, originators, ground condition dates (1755-1922), scales, and purposes. The digitized selection includes maps of: the state, Massachusetts counties, town surveys, coastal features, real property, parks, cemeteries, railroads, roads, public works projects, etc.

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.

Portuguese Democratisation 40 Years on: Its Meaning and Enduring Legacies

On the fortieth anniversary of the Carnation Revolution, it is pertinent to ask how Portuguese citizens understand their transition to democracy. In this article, some of the main findings concerning the meanings and legacies of 25 April 1974 are presented, drawing on the findings of two surveys focusing on Portuguese attitudes towards 25 April and fielded in 2004 and 2014, respectively, to a representative sample of the Portuguese population. Here we focus on the degree to which the transition is viewed positively and its social and economic legacies. In the final sections, the main findings of the articles in this special issue are discussed through a presentation of the main questions they answer and the new ones they raise.

The meaning of Cyprus; moving toward banking union. CEPS Commentary, 8 April 2013

While acknowledging that Cyprus is too small to matter for global financial markets, this Commentary finds that its case could turn out to become a very important precedent for the way European policy-makers deal with future banking problems and the plans for a ‘banking union’.

A Proper Yield Curve for Greece to Kick-Start Financial Intermediation. ECMI Policy Brief No. 21, 10 December 2013

At present, the market is severely mispricing Greece’s sovereign risk relative to the country’s fundamentals. As a result of the mispricing, financial intermediation in Greece has become dysfunctional and the privatisation of state-owned assets has stalled. This mispricing is partially due to an illiquid and fragmented government yield curve. A well-designed public liability management exercise can lead to a more efficient pricing of Greece’s government bonds and thereby help restore stable and affordable financing for the country’s private sector, which is imperative in order to overcome Greece’s deep recession. This paper proposes three measures to enhance the functioning of the Greek government debt market: i) Greece should issue a new five-year bond, ii) it should consolidate the 20 individual series of government bonds into four liquid securities and iii) it should offer investors a swap of these newly created bonds into dollar-denominated securities. Each of these measures would be beneficial to the Hellenic Republic, since the government would be able to reduce the face value and the net present value of its debt stock. Furthermore, this exercise would facilitate the resumption of market access, which is a necessary condition for continuous multilateral disbursements to Greece.