Performance and reliability of flexible substrates when subjected to lead-free processing

The use of flexible substrates is growing in many applications such as computer peripherals, hand held devices, telecommunications, automotive, aerospace, etc. The drive to adopt flexible circuits is due to their ability to reduce size, weight, assembly time and cost of the final product.They also accommodate flexibility by allowing relative movement between component parts and provide a route for three dimensional packaging. This paper will describe some of the current research results from the Flex-No-Lead project, a European Commission sponsored research program. The principle aim of this project is to investigate the processing, performance, and reliability of flexible substrates when subjected to new environmentally friendly, lead-free soldering technologies. This paper will discuss the impact of specific design variables on performance and reliability. In particular the paper will focus on copper track designs, substrate material, dielectric material and solder-mask defined joints.

Leadership and management standards in the UK Lifelong Learning sector

Leadership and Management Standards in the UK Lifelong Learning Sector. Presentation on research findings on leadership and management in the LLS sector, in the context of UK government policy changes introducing the 2007 Principals' Qualifying Programme (PQP) delivered by the Centre for Excellence in Leadership (CEL)/Learning and Skills Improvement Service (LSIS). Discusses the role of standards in leadership and management professional practice and development and sums up the history of development of standards in relation to the National Occupational Standards (NOS) for Leadership and Management, based on the UK Management Standards Centre (MSC) Institute for Leadership and Management Standards. Discusses the Lifelong Learning UK (LLUK) Benchmark Role Specification for Principals in FE, Sixth Form and Specialist Colleges and the fact that the LSIS PQP has adopted those as part of its programme for Principal development. In the context of the implementation of standards for leadership and management, discusses the importance of values-based and research-informed leadership and the development of trust in lifelong learning sector institutions, given the multiple challenges facing vocational education and training (VET) institutions and the relative lack of recognition and support for the difficult roles taken on by Principals and senior leaders.

The performance and persistence of exchange-traded funds: evidence for iShares MSCI country-specific ETFs

The aim of this paper is to investigate the performance and persistence of 20 iShares MSCI country-specific exchange-traded funds (ETFs) in comparison with S&P 500 index over the period July 2001 to June 2006. There are several studies analysing mutual funds performance in past years, but very little is known about ETFs. In our analysis the Sharpe, Treynor and Sortino ratios are used as risk-adjusted performance measures. To evaluate performance persistence and therefore if there is any relationship among past performance and future performance, we apply to the Spearman Rank Correlation Coefficient and the Winner-loser Contingency Table. The main findings are at two levels. First, ETFs can beat the U.S. market index based on risk-adjusted performance measures. Second, there is evidence of ETFs performance persistence based on annual return.