On stabilisability of 2-D MIMO shift-invariant systems

We concentrate on the linear spatially distributed time-invariant two-dimensional systems with multiple inputs and multiple outputs and with control action based on an array of sensors and actuators connected to the system. The system is described by the bivariate matrix polynomial fraction. Stabilisation of such systems is based on the relationship between stability of a bivariate polynomial and positiveness of a related polynomial matrix on the unit circle. Such matrices are not linear in the controller parameters, however, in simple cases, a linearising factorisation exists. It allows to describe the control design in the form of a linear matrix inequality. In more complicated cases, linear sufficient conditions are given. This concept is applied to a system with multiple outputs—a heat conduction in a long thin metal rod equipped with an array of temperature sensors and heaters, where heaters are placed in larger distances than sensors.     

Students in Higher Education Governance in Europe: Contrasts,commonalities and controversies

Tertiary Education and Management - This article provides a synthesizing overview of the roles of students in higher education governance in Europe. We first review the existing literature on...     

Evaluating the impact of R&D tax credits on innovation: A microeconometric study on Canadian firms

This study examines the effect of R&D tax credits on innovation activities of Canadian manufacturing firms. Over the 1997-1999 period the Federal and Provincial R&D tax credit programs were used by more than one third of all manufacturing firms and by close to two thirds of firms in high-technology sectors. We investigate the average effect of R&D tax credits on a series of innovation indicators such as: number of new products, sales with new products, originality of innovation, etc. using a non-parametric matching approach. Compared to a hypothetical situation in the absence of R&D tax credits, recipients of tax credits show significantly better scores on most but not all performance indicators. We therefore conclude that tax credits lead to additional innovation output.     

THE HUMANITIES AND THE SOCIAL SCIENCES IN TRANSITION

The humanities and the social sciences particularly suffered under communism because of the susceptibility of their disciplines to political and ideological manipulation. Nevertheless, in some of them the intellectual climate was more liberal in the Academy than in the universities. With transition, a much reduced research staff has adopted new approaches to research and to the definition of areas of research, one of which is a reevaluation of the recent history of the Czech Republic. A major task of the humanities and the social sciences is permanent reflection on the human condition.     

The effect of dust particles on cellulose degradation

This study focuses on the changes in properties of cellulose-based paper, which can take place as a consequence of its contamination by dust particles. The PM1 (fine) and PM10 (coarse) fractions of the dust particles from archival repositories were collected on cellulose filters Whatman 41, polytetrafluorethylene, and quartz filters. The latter two types of samples were subsequently analyzed gravimetrically, with ion chromatography, PIXE, and the thermal–optical transmission method, giving mass, ionic, elemental carbon, and organic carbon concentrations. After artificial aging, the viscosity-average degree of polymerization of cellulose (DP_v) was measured. It was confirmed that cellulose-based paper can undergo substantial changes when contaminated by dust particles and artificially aged. The decrease of the DP_v of cellulose showed a negative correlation with the deposited mass of sulfate ions in the dust particles. Considering the particle size fraction, the results suggest the decisive importance of the fine (PM1) particles. The results provide better understanding of how particulate matter contributes to the chemical degradation of cellulose-based paper. Such knowledge is of importance when considering appropriate conservation measures in archives, libraries, and galleries.     

Structural embeddedness of students’ professional expectations: the Czech Republic and Taiwan in comparative perspective

Abstract

We compare the role of gender, socioeconomic background and measured ability on students’ secondary school placement and professional expectations in Taiwan and the Czech Republic, two countries that have experienced substantial reforms in their educational systems in the context of political change and economic development. Using data from the international PISA 2006 survey of 15-year-olds, our analysis reveals that Czech academic upper-secondary schools are much more selective in terms of socioeconomic background and gender than comparable Taiwanese senior high schools. Controlling for measured ability and other factors, students’ professional expectations are also more closely linked to socioeconomic background and gender in the Czech Republic than in Taiwan.     

Burnout among university faculty: the central role of work–family conflict

This study examined both direct and indirect associations of faculty burnout with psychosocial work environments, using the job resources-demands framework. A sample of 2,229 faculty members (57.1% male) throughout public universities in the Czech Republic completed a questionnaire comprising measures of burnout and psychosocial work environment characteristics from the Copenhagen Psychosocial Questionnaire II. We formulated a structural model that hypothesised a positive effect of job demands (quantitative demands, work-family conflict (WFC), job insecurity) and a negative effect of job resources (influence, social community, role clarity) on burnout. Results showed that the strongest predictor of burnout was WFC, which had a direct positive effect on burnout and mediated the positive effect of quantitative demands on burnout. Further, a small direct negative effect of age and an indirect positive effect of involvement in research grants and administrative paperwork on burnout were observed. The findings indicate that university management can most effectively address burnout in academic staff not only by implementing policies that reduce WFC, workload and administrative paperwork, but also by providing more job resources to younger faculty and faculty involved in grant-based projects.     

Integrating Physical Education and Geography in elementary education in the Czech Republic and the Republic of Slovenia

ABSTRACT

This paper addresses the lack of international knowledge and research in interdisciplinary curriculum development and teaching in the subjects of Physical Education and Geography. The authors analysed and compared elementary school curricular documents from two ex-communist countries, the Czech Republic and the Republic of Slovenia (an ex-socialist Yugoslav republic) to reveal how integration of Physical Education and Geography can be embedded at the policy level. A questionnaire survey among teachers examined how the integration is implemented in practice. The authors present some practical examples to show how Physical Education and Geography integration can be achieved. The findings of the study indicate that while interdisciplinarity is an important policy goal of the educational systems of these two countries, integration is not being implemented in practice.