Are there MACHOs in the Milky Way halo?

Microlensing searches aim to detect compact halo dark matter via its gravitational lensing effect on stars within the Large Magellanic Cloud. The most recent results have led to the claim that roughly one fifth of the galactic halo dark matter may be in the form of compact, solar-mass objects. We analyze this hypothesis by considering the goodness-of-fit of the best-fit halo dark matter solutions to the observational data. We show that the distribution of the durations of the observed microlensing events is narrower than that expected to result from a standard halo lens population at 90 to 95% confidence. Only when the fraction of expected background (non-halo) events is significantly increased does the discrepancy between the observed and theoretical event duration distributions disappear. This indicates that it is possible that most of the lenses responsible for the observed microlensing events are not located within the Milky Way halo.Comment: 5 pages, 2 figures, minor changes to discussion and additional references, version to appear in Astronomy and Astrophysic

Are financial services over-regulated?

As the Equitable Life saga drags on, accounting scandals break over Enron and WorldCom and allegations of self-serving analysts reports swirl around Merrill Lynch and other US investment banks, this may seem an extraordinary question to ask. But this is the very time that one must beware of the ‘dangerous dogs’ reaction1. It is easy to forget in the immediate aftermath of scandals that extra regulation may achieve little beyond satisfying the call for ‘something to be done’ and can cumulatively cost a lot, even perversely increase the chances of future disasters2. With the EU’s Financial Services Action Plan, the DTI’s consultation on Company Law, the Sandler review of savings and the FSA’s review of polarisation, Listing Rules and simplified product selling, the opportunity for radical change, good or bad, is all to apparent. This article seeks to give an overview of the current position and assess the danger of an over-reaction

Devolution or divergence? Third Sector policy across the UK since 2000

Since the end of the last century the United Kingdom has been a less united country than it was. In 1999 a separate Scottish Executive (from 2007 the Scottish Government) and Welsh Assembly Government were established, followed later by a new Northern Ireland Executive and Assembly, based on a power sharing agreement known from its date in 1998 as the ‘Good Friday Agreement’. A number of key policy making powers were devolved from Westminster to these new administrations; these include policy on and support for third sector activity in the different countries. Since 2000 therefore there have in effect been four separate policy regimes within the UK focused on the activity and organisation of third sector organisations, although, compared to the greater levels of regional devolution existing in many other developed industrial nations, the UK remains a largely centralised state in both political and policy terms. This paper explores some of the key implications of this recent devolution and examines the extent to which it has led to a divergence in policy development and delivery – asking the question, to what extent has devolution led to a divergence in third sector policy regimes across the UK

Market abuse

On 1st December 2001, the Financial Services and Markets Act 2000 (‘FSMA’) came into force. One of its most controversial sections is Part VIII which gives the Financial Services Authority (‘FSA’) the power to impose civil penalties for market abuse. Despite the many doubts raised about these provisions and their as yet untested nature, the European Commission has proposed a European Directive on Market Abuse1, to extend the concept of ‘administrative sanctions’ for market abuse across the whole European Economic Area (‘EEA’). This paper looks at the issues currently raised by the UK legislation and any further problems the European legislation may bring

Aid, development and English language teaching : a thesis presented in partial fulfilment of the requirements for the degree of Master of Philosophy in Development Studies at Massey University, Palmerston North, New Zealand

The past few decades have seen the ascendancy of English as the global language of business and international interaction and as a result it has come to be viewed in the minds of many policy makers as fundamental to development. Accordingly English language instruction programmes have increasingly been integrated into development programmes both at a domestic recipient and international donor level. These programmes are frequently framed within the paradigms of empowerment and capacity building yet little readily accessible research seems to be available regarding the practical role English language aid programmes may play in these processes with most examination seeming to be centred either on discourse debate or cost/benefit analysis of programmes. This thesis endeavours to examine the perceptions of recipients and providers regarding the provision of English language instruction programmes. It finds that despite a provider focus on institutional capacity building extrinsic, primarily economic, considerations ensure that there is a strong recipient demand for these programmes. It also finds that, even with an increasing provider desire to use participatory paradigms, programme parameters are still largely determined by providers due to their control of funds. By reason of this the efficacy of English language instruction in promoting recipient empowerment and capacity building remains open to question

The Sagittarius dwarf galaxy as a microlensing target

We estimate the optical depth, time-scale distribution and fraction of microlensing events originating from sources in the Sagittarius dwarf galaxy (Sgr) lensed by deflectors in the Milky Way. These events have a time-scale longer by a factor ~1.3 than the MW/MW events and occur mainly on sources fainter than V~21 mag below Sgr's turn off. The fraction of events involving a source in Sgr depends on the location and extinction of the field and on the limiting magnitude of the survey. The contribution of the MW/Sgr events is negligible (<1%) at very low latitudes (|b|<2 deg.) but increases continuously towards higher |b| and becomes dominant near the highest density region of the dwarf galaxy. Sgr is present within the fields of current microlensing surveys and any optical depth map inferred from observations will become biased by the presence of Sgr towards higher |b| where the contribution of MW/Sgr events is significant. Systematic spectroscopic measurements on the sources of all the microlensing events may allow detection of this kind of event for which the degeneracy on the lens mass can be significantly reduced.Comment: 9 pages, 8 figures. Accepted for publication in A&A Main Journa

Blogging: an opportunity for librarians to communicate, participate and collaborate on a global scale

Blogs are an important element of the second generation of the web; or ‘Web 2.0’ as it is commonly referred to. ‘Web 2.0’ refers to the evolution from static "read only" web pages (Web 1.0) to dynamic, interactive pages encouraging users to create, interact and share content across multiple applications (O’Reilly, 2005). Blogging, along with other Web 2.0 technologies such as social networking, wikis, social bookmarking, photo sharing, video sharing, and microblogging, form part of the emergent ‘social media’ family; a collection of online tools that encourage users to communicate, participate, and collaborate on a global scale. Many library and information professionals have embraced blogging as a platform to document their career, enhance their profile, network with other librarians; and share anecdotes about their lives as librarians. The aim of this article is to present a brief overview of the history of blogs and a short review of literature related to blogging, libraries and reference librarians. It will also provide a list of recommended blogs, a discussion of the advantages of reading and writing blogs and some top tips for starting up your own blog