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EQ-5D and the EuroQol Group: Past, Present and Future
Over the period 1987–1991 an inter-disciplinary five-country group developed the EuroQol instrument, a five-dimensional three-level generic measure subsequently termed the ‘EQ-5D’. It was designed to measure and value health status. The salient features of its development and its consolidation and expansion are discussed. Initial expansion came, in particular, in the form of new language versions. Their development raised translation and semantic issues, experience with which helped feed into the design of two further instruments, the EQ-5D-5L and the youth version EQ-5D-Y. The expanded usage across clinical programmes, disease and condition areas, population surveys, patient-reported outcomes, and value sets is outlined. Valuation has been of continued relevance for the Group as this has allowed its instruments to be utilised as part of the economic appraisal of health programmes and their incorporation into health technology assessments. The future of the Group is considered in the context of: (1) its scientific strategy, (2) changes in the external environment affecting the demand for EQ-5D, and (3) a variety of issues it is facing in the context of the design of the instrument, its use in health technology assessment, and potential new uses for EQ-5D outside of clinical trials and technology appraisal.
Journal Article
A Review of Extremely Fast Charging Stations for Electric Vehicles
The expansion of electric vehicles made the expansion of charging infrastructure rudimentary to keep up with this developing technology that helps people in a myriad of ways. The main drawback in electric vehicle charging, however, is the time consumed to charge a vehicle. The fast charging of electric vehicles solves this problem thus making it a lucrative technology for consumers. However, the fast charging technology is not without its limitations. In this paper we have identified the technology gaps in EV fast charging stations mostly focused on the extremely fast charging topology. It will help pave a path for researchers to direct their effort in a consolidated manner to contribute to the fast charging infrastructure. A thorough review of all aspects and limitations of existing extremely fast charging (XFC) stations have been identified and supporting data are provided. The importance of DC power network based on free fuel energy sources and silicon carbide-based power electronics are proposed to provide ultra-low cost and ultra-high speed XFC stations.
Journal Article
Introduction to computer and network security : navigating shades of gray
\"This text provides a classroom-tested, practical introduction to software design and implementation, cryptographic tools, and networking issues while addressing social, economic, and political implications. It covers cutting-edge topics, such as wireless security and attacks on websites, privacy and digital rights management, and recent work on security and economics. The text includes hands-on projects to help students better understand how computers and networks function. It also contains a number of case studies and discussion points\"-- Provided by publisher.
Book
EQ-5D: a plea for accurate nomenclature
Between 1987 and 1990, the EuroQol Group developed a 5-dimension health-related quality of life instrument, originally known as ‘the EuroQol instrument’, which since 1995 has been called the ‘EQ-5D’. For several years, ‘the EuroQol instrument’ and ‘EQ-5D’ were both deployed in published materials. In order to standardise nomenclature, the EuroQol Group agreed in 2001 on a terminology glossary containing 12 items; this was recently revised and augmented to include 22 items and can be found on the Group’s website (
www.euroqol.org
). Since 2009, EQ-5D has been available in three versions: EQ-5D-3L, EQ-5D-5L, and EQ-5D-Y, where 3L stands for three levels, 5L for five levels, and Y for youth. Yet, almost 20 years after the original glossary was published, the instrument and its components continue to be inaccurately named in published materials. Two surveys – of arthritis applications, and 82 recent publications – found a variety of terms used to describe the instrument. Despite the instrument being named ‘EQ-5D’ for 25 years, and the terms ‘EQ-5D-3L’ and ‘EQ-5D-5L’ being established for a decade, variations of ‘the EuroQol instrument’ continue to be used as descriptors. The EuroQol Group’s website contains advice on how to use EQ-5D, including nomenclature, and potential users are urged to consult the site. Since standardising nomenclature is crucial in the compilation of systematic reviews, the EuroQol Group would like to emphasise that ‘EQ-5D’ is not an abbreviation and is the correct term to use when referring to the instrument in general. In the interests of accuracy and good practice, users of the EuroQol family of instruments should employ the standard EQ-5D nomenclature when reporting and discussing their findings.
Journal Article
Covenants without Courts: Enforcing Residential Segregation with Legally Unenforceable Agreements
Racial restrictive covenants are private agreements prohibiting sale, rental, use or occupancy of properties by persons of designated races, ethnicities, nationalities and religions. Widely acknowledged for facilitating residential segregation, the Supreme Court ruled covenants unenforceable in 1948. Yet they remained legal to write and reference, allowing realtors, banks, insurers, title companies and government agencies to continue to rely on unenforceable covenants in their decisions and policies. Beyond legal enforceability, covenants were essentially signals that coordinated the behavior of a variety of private individual and institutional actors—signals that remained effective without the courts. Evidence is presented to support this claim.
Journal Article
Stretch It but Don’t Break It
Recent research suggests that loss-framed contracts are an effective instrument for principals to maximize the effort of their agents. Framing effects arise from defining quantity and quality thresholds that vary the salience of losses and gains even while preserving the payoff equivalence of the underlying contract. While plausible interpretations of prospect theory’s loss-aversion insight suggest that a loss frame would lead to more effort, we show that contract thresholds also exert a norm-framing effect on performance that can trump the impact of loss aversion. Loss framing therefore carries a risk: poorly selected thresholds may reduce effort. Principals may prefer to avoid this risk by offering contracts that impose no threshold at all.
Journal Article
Denial-of-service attack-detection techniques
Denial-of-service (DoS) detection techniques - such as activity profiling, change-point detection, and wavelet-based signal analysis - face the considerable challenge of discriminating network-based flooding attacks from sudden increases in legitimate activity or flash events. This survey of techniques and testing results provides insight into our ability to successfully identify DoS flooding attacks. Although each detector shows promise in limited testing, none completely solve the detection problem. Combining various approaches with experienced network operators most likely produce the best results.
Journal Article