Are Condorcet and minimax voting systems the best?

For decades, the minimax voting system was well known to experts on voting systems, but was not widely considered to be one of the best systems. But in recent years, two important experts, Nicolaus Tideman and Andrew Myers, have both recognized minimax as one of the best systems. I agree with that. This paper presents my own reasons for preferring minimax. The paper explicitly discusses about 20 systems, though over 50 are known to exist.Comment: 41 pages, no figures. The Introduction has been changed. Also fixed some version 6 errors in referencing subsection numbers in section

Estimating the True Accuracy of Regression Predictions

Given the lack of mathematical proof to decide upon the best estimation technique, the author presents his comparison of four closed-formula estimators (Burkett, Claudy, Rozeboom, Browne) and the omit-one method for estimating TRS, the true shrunken correlation (not to be confused with TR, the true multiple correlation). The recommendations are based on artificial populations with known TRS

Strike waves, union growth and the rank-and-file/bureaucracy interplay : Britain 1889-1890, 1910-1913 and 1919-1920

Gerald Friedman's Reigniting the Labor Movement was a highly ambitious, unashamedly partisan, historical and transnational comparative analysis of the rise and demise of the labour movement, which identified the way in which rank-and-file workers' spontaneous and innovative strike militancy represents an ‘incipient rebellion against the capitalist system’. In the process, the book made a compelling case for the restoration of past militant worker action as an essential means of ‘reigniting’ the contemporary labour movement. While I find myself in considerable sympathy and agreement with much of the overall analysis, there are distinct but related features of Friedman's thesis that are critically explored in this article. These concern the nature of the relationship between strike movements and union membership growth, and the process by which the unions that emerge from periods of radical labour unrest then seek to dampen down worker militancy in order to bargain with employers/state within the confines of capitalism. My reassessment of Friedman's analysis, framed specifically within the national context of the UK during the historical window of the late nineteenth and early twentieth centuries (specifically 1889–1920), aims to illustrate what I regard as five of the main problematic features of the study

Decomposition of automotive manufacturing machines through a mechanism taxonomy within a product lifecycle management framework

The automotive sector as with other manufacturing industries is under continual pressure from the consumer to deliver greater levels of product customisation at a higher quality and at reduced costs. Maintaining market position is therefore increasingly determined by a company's ability to innovate design changes quickly and produce greater numbers of product variants on leaner production lines with shorter times to market. In response manufacturers are attempting to accommodate product customisation and change through the use of reconfigurable production machines. Besides the need for flexibility, production facilities represent a significant investment for automotive manufacturers which is increasingly critical to commercial success; consequently the need to reduce costs through the reuse of assembly and manufacturing hardware on new product programs is becoming crucial. The aim of this research is to enable production machines to be more easily and cost effectively built and subsequently reconfigurable through the adoption of a component-based approach to their implementation utilising virtual manufacturing tools such as Product Lifecycle Management (PLM). It is suggested that through the decomposition of manufacturing machines into standardised mechanisms and their associated data structures a revised business model can be defined. The mechanisms are classified and deployed as part of a consistent integrated data structure that encompasses product, process and plant information. An objective is to properly integrate manufacturing data with more established Product Data Management (PDM) processes. The main areas of research reported in this article are, (1) development of a method for identifying and mapping data producers, consumers and flow, (2) development of standardised data structures for the management of manufacturing data within a PLM tool, (3) development of a taxonomy for the decomposition of manufacturing and assembly lines into a library of standard physical, logical and structural mechanisms and their associated interfaces. An automotive OEM case study is presented to illustrate the classification and management of production mechanisms focusing on an engine assembly line

Expression of Liver Phenotypes in Cultured Mouse Hepatoma Cells

Mouse hepatoma cells were established in vitro as a permanently growing line designated Hepa. The mass population and a subclone were characterized for their karyotype and their retention of liver-specific properties. An examination of 17 hepatic traits revealed that the cell lines secreted several serum proteins. The activities of a number of liver-specific enzymes, however, appeared to be absent in these cells. The identification of differentiated properties of cultured hepatoma cells permits the use of these lines in a variety of studies such as cell hybridization, biochemical analysis of tissue-specific gene products, and the modulation of expression of genes governing differentiated phenotypes. This report presents the analysis of a broad spectrum of characteristics and thereby describes one of the most fully defined hepatoma cell lines of murine origin in the literatur

“No official help is available” - experience of parents and children with congenital heart disease during COVID-19

Introduction: the purpose was to explore the experience, information, support needs and decision-making of parents with congenital heart disease (CHD) during the COVID-19 crisis. Materials and methods: a survey study of parents of children with CHD, children and young people, capturing experiences, decision-making, information and support needs during the COVID-19 crisis. The survey launched for 1 month (9thApril 2020) during the first infection wave in the UK and subsequent restriction of free movement under lockdown rules from March 23rd2020 until May 31st2020. Results: 184 parents and 36 children/young people completed the survey. Parents were more likely to worry about the virus (86.4%) than children/young people (69.4%), whilst (89%) parents were more vigilant for symptoms of the virus vs. children/young people (69.4%). A thematic analysis of the qualitative comments covered 34 subthemes, forming eight-overarching themes: Virus 1)risk of infection, 2)information, guidance and advice, 3)change in health care provision, and 4)fears and anxieties; Lockdown and isolation 5)psychological and social impact, 6)keeping safe under lockdown, 7)provisions and dependence on others, 8)employment and income.Conclusions: there was widespread concern over the virus especially amongst parents. Parents and children/young people however, were frustrated with the lack of specific and paediatric focused information and guidance, expressing disappointment with the adult centric information available. Parents also felt alone, especially with their concerns around the implications of cardiac service suspension and the implication for their child’s health. In order to better support children and their families, resources need to be developed to address families’ and children/young people’s concerns for their health during this pandemic. <br/