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The article identifies the most important controversies related to public opinion polls on electoral preferences, explains their substance, & discusses their impact on the possibility to use information obtained in the surveys. The article further focuses on the importance of surveys for representative democracy, the impact of the publication of opinion polls' results on public opinion, the possibilities of manipulating surveys, the risks related to the growth of research production (high non-response rate & the growth of survey costs, non-transparency of the market, incorrect application of advanced data analyses), the limits to election forecasting, & issues related to the relationship between research & journalism. Opinion polls contribute to shaping the environment for political competition. The nature of their impact is determined by their quality. Serious risks are associated with the possibility for intentional manipulation, poor quality of the survey process, & misinterpretation of results. Knowledge on research, publication of contextual information together with the survey data, & free competition in the market can help reduce the risks. The possibilities for quantification in social research do not remove the obligation to ensure sound theoretical grounding & qualified judgment, which are the prerequisites for the credibility of all conclusions drawn from the data. Tables, Graphs, References. Adapted from the source document.

The aim of the article is to provide readers with general information on nanotechnology & possibilities of its use, as well as to refer to some of its relevant security risks. The author currently mentions claims of some scientists & NGOs warning against possible misuse of nanotechnology due to the insufficient control over the research & the application. So far, less anticipated consequences of nanotechnology, converging with genetics, robotics, informatics & cognitive science, on all branches of the economy & social & other relations require that sufficient information should be given not only to the Czech experts but to general society as well. The real threat of the misuse of nanotechnology towards the research, development & the production of the new types of chemical, biological & nuclear weapons & other security risks increase that need. In spite of the long-term knowledge of nanotechnology, the possibilities of its use in a revolutionary way increased from 80th of the last century. It was due to the new types of microscopes enabling for the first time precise manipulation of the nanoscale particles. Results of nanoscale exploration are more & more visible eg., in various consumer products & according to the views of some scientific circles we could witness dramatic transformation of the economy in the near future. The article points out the rapid increase of spending on basic nanoscience research, growing number of governmental, private & multinational corporations & various national nanoinitiatives dealing with this kind of research & development, accepted mainly in the high-industrialized countries. In the article there are mentioned some reservations & concerns of the prominent American scientists & NGOs in association with the important goal of the nanotechnology research focused on the process of self-reproduction, self-repair & self-assembly. Various arms control & disarmament experts pay attention to the connections of the nanotechnological research with the possibility of production of the new types of nuclear weapons of the 4th generation. In conclusion the author expresses his view on the usefulness to create efficient system of the governmental & public control of this sphere of the scientific research & the need to devote sufficient attention by the appropriate officials & experts to the security aspects of nanotechnology. Adapted from the source document.