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1.
ADE-4: a multivariate analysis and graphical display software 总被引:59,自引:0,他引:59
Thioulouse Jean Chessel Daniel Dole´dec Sylvain Olivier Jean-Michel 《Statistics and Computing》1997,7(1):75-83
We present ADE-4, a multivariate analysis and graphical display software. Multivariate analysis methods available in ADE-4 include usual one-table methods like principal component analysis and correspondence analysis, spatial data analysis methods (using a total variance decomposition into local and global components, analogous to Moran and Geary indices), discriminant analysis and within/between groups analyses, many linear regression methods including lowess and polynomial regression, multiple and PLS (partial least squares) regression and orthogonal regression (principal component regression), projection methods like principal component analysis on instrumental variables, canonical correspondence analysis and many other variants, coinertia analysis and the RLQ method, and several three-way table (k-table) analysis methods. Graphical display techniques include an automatic collection of elementary graphics corresponding to groups of rows or to columns in the data table, thus providing a very efficient way for automatic k-table graphics and geographical mapping options. A dynamic graphic module allows interactive operations like searching, zooming, selection of points, and display of data values on factor maps. The user interface is simple and homogeneous among all the programs; this contributes to making the use of ADE-4 very easy for non- specialists in statistics, data analysis or computer science. 相似文献
2.
Marin Bougeret Guillerme Duvillié Rodolphe Giroudeau 《Journal of Combinatorial Optimization》2018,36(3):1059-1073
In this paper we consider the multidimensional binary vector assignment problem. An input of this problem is defined by m disjoint multisets \(V^1, V^2, \ldots , V^m\), each composed of n binary vectors of size p. An output is a set of n disjoint m-tuples of vectors, where each m-tuple is obtained by picking one vector from each multiset \(V^i\). To each m-tuple we associate a p dimensional vector by applying the bit-wise AND operation on the m vectors of the tuple. The objective is to minimize the total number of zeros in these n vectors. We denote this problem by Open image in new window , and the restriction of this problem where every vector has at most c zeros by Open image in new window . Open image in new window was only known to be Open image in new window -hard, even for Open image in new window . We show that, assuming the unique games conjecture, it is Open image in new window -hard to Open image in new window -approximate Open image in new window for any fixed Open image in new window and Open image in new window . This result is tight as any solution is a Open image in new window -approximation. We also prove without assuming UGC that Open image in new window is Open image in new window -hard even for Open image in new window . Finally, we show that Open image in new window is polynomial-time solvable for fixed Open image in new window (which cannot be extended to Open image in new window ). 相似文献
3.
ABSTRACTDrawing on Amartya Sen’s writings, this article presents the capability approach to democracy and shows its relevance for the sociological reflection and research on democratic processes conceived as ways to convert individual preferences into collective norms or decisions. Two moments are key in this respect: the formation of individual preferences and their translation into collective norms in the course of public debates. The initial sections present Sen’s conception of democracy, particularly emphasizing its articulation with the notions of ‘positional objectivity’ and ‘conversion’. Then, this conception is compared with two other mechanisms that may be used to coordinate individual decisions or preferences, namely the market and idealistic views on deliberative democracy. The article emphasizes how the capability approach departs from these two conceptions with regard to the two key concepts of capacity to aspire and capability for voice. The final section shows how Sen’s notion of democracy may open up a new field for research, namely the sociological investigation of the informational (or knowledge) basis of democracy. 相似文献
4.
Jean-Michel Collette 《LABOUR》1988,2(3):45-61
ABSTRACT: One of the most disquieting features of the situation prevailing in many European market-economy countries over the last fifteen years has been the persistence of high levels of unemployment. Employment and labour force prospects were recently examined by the experts of the United Nations Economic Commission for Europe as part of the process for the preparation of an Overall Economic Perspective to the Year 2000. The purpose of this paper is to briefly present some of the scenarios which were prepared for this project and to examine some of their main implications, particularly with respect to the overall labour demand and supply balance in western Europe. Particular attention is paid in the paper to the process of working time reduction, the emergence of new patterns of work and their possible impact on employment prospects. 相似文献
5.
Jean-Michel Costes Sylvia Kairouz Eva Monson Vincent Eroukmanoff 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2018,34(4):1293-1311
Lotteries are one of the most prevalent forms of gambling and generate substantial state revenues. They are also argued to be one of the least harmful forms of gambling. This paper is one of the first to examine exclusive lottery gamblers and compares their gambling patterns and problems as well other associated risky behaviours to those who are not exclusive lottery gamblers. Data were derived from two large surveys conducted with representative adult samples in France (n?=?15,635) and Québec (n?=?23,896). Participants were separated into two groups: exclusive lottery gamblers (ELGs) and non-exclusive lottery gamblers. Using multivariate analysis, study results reveal that ELGs, who represent two thirds of gamblers, generally exhibit less intensive gambling patterns and are less likely to report other risky behaviours. However, harms associated with moderate risk and problem gambling are found to be concentrated in specific subpopulations for both groups, primarily males, older individuals, and those who report lower income and education level. Given widespread participation in lotteries and concentration of harm within specific subgroups, these findings point to the need for prevention efforts despite the lower levels of harm associated with lottery gambling. 相似文献
6.
Jean-Michel Costes Sylvia Kairouz Vincent Eroukmanoff Eva Monson 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2016,32(1):79-91
In 2010 France enacted a law to regulate supply and consumption of online gambling. Its primary aim was to protect citizens from gambling-related harm. This study aims to assess differences in gambling patterns and related harm between online gamblers who use licensed versus unlicensed sites. Participants (N = 3860) completed a self-administered online survey on gambling practices. Pairwise logistic regressions examined the association between the legal statuses of gambling sites people patronized and demographic variables and gambling types. Multivariate logistic regression models explored associations between gambling patterns and related problems according to the legal status of sites people have gambled on. Overall, 53.7 % of online gamblers report gambling exclusively on licensed sites. Those who bet on regulated activities on unlicensed sites, versus licensed sites, are more likely to be female, younger, less educated, inactive in the labor market and are more likely to perceive their financial situation to be difficult. Gambling on unlicensed sites is associated with more intense gambling patterns and more gambling-related problems compared to licensed sites. Findings demonstrate that gambling activities carried out on state licensed sites are associated with less overall harm to gamblers. Implications of these findings on future policy are discussed and prospective research directions are outlined. 相似文献
7.
The socio-ecological challenges facing communities in the 21st century are building towards a critical conjuncture of history, culture, power, and profound inequity. Scholars working in the service of social transformation and improving the wellbeing of communities are calling for creative, deliberate, and consequential interventions. Tharp & O’Donnell (this issue) call for increased engagement between Cultural-Community Psychology and Cultural-Historical Activity Theory to lead this kind of call. Drawing from our experiences in community based design research, we argue for cultivating axiological innovations in research and interventions. We explore three examples including: critical historicity, inter-generational learning, and strategic transformations of institutional relations. 相似文献
8.
This article describes two computer-based career counseling interventions provided for adults who are auto workers in career transition. It was found that these workers can increase their level of career decidedness and make progress in their commitment to occupational choice through the use of a computer-based career counseling program. Supporting previous research, this study indicated that computer-plus-counselor intervention is more effective in this type of career counseling than the computer-only intervention. 相似文献
9.
The Evolution of Organizations: Suggestions from Complexity Theory About the Interplay Between Natural Selection and Adaptation 总被引:1,自引:0,他引:1
Michael C. White Daniel B. Marin Deborah V. Brazeal William H. Friedman 《Human Relations》1997,50(11):1383-1401
There has been much debate in the managementliterature between neo-Darwinists (who believe in thenatural selection of populations of organizations) andadaptationists (who contend that changes in organization structure and behavior occur in response to theenvironment). The general thesis of neo-Darwinism isthat species are blindly selected for survival by theenvironment. The latest empirical support for the dominant neo-Darwinism perspective adopted bymost biologists is based primarily on the experimentsconducted by Salvador Luria who claims to haveconclusively demonstrated that genes mutate randomly.Recently, however, biologists have re-examined Luria sresearch methods and, after replications of hisexperiments, now question some aspects of the validityof his results. Moreover, there is now new researchwhich provides support for the earlier adaptationistposition, namely, the existence of evolutionary driversand directors existing within self-organizing systems.Of particular importance to the present study is the experimental indication thatself-organizing systems play a conscious role in theirown evolution. We propose that similar mechanisms orprocesses operate in organizational adaptation, thuspointing toward a theoretical modification ofneo-Darwinism that embraces both adaptation and naturalselection in a general, unified theory. 相似文献
10.
Despite the important role they play in preventing homelessness, those who shelter people who can not afford housing of their own have been neglected by researchers. This study examines the characteristics of these low income informal shelter providers. While informal shelter providers were similar to a comparison group of low income households that did not shelter others, there were also significant differences between the two groups. Informal shelter providers were more much more likely to live in single family dwellings, they were more likely to be long-term residents of the community, they were more likely to have experienced homelessness themselves, and they devoted a disproportionate share of their incomes to housing. 相似文献