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Ankieta a eksperyment w kontekście WTA i WTP - rola bodźca urealniającego w procesie wyceny danych osobowych

100%

Bizon W.

2016

nr 5 (67)

14-20

Social research is based in its dominant part on polls and surveys in which respondents declare how they would react in a particular situation in the future. It is not anything uncommon that when confronting the data previously gathered during the surveys with the actual situation visible and definite differences occur. They may be partly due to the false declarations, partly because of an unexpected change of behaviour just in the moment of taking a decision. One of the current problems in knowledge and information based economy is an issue of privacy protection. The value of private personal data is difficult to be priced objectively and unambiguously. In this context, an approach based on WTA (willingness to accept) and WTP (willingness to pay) seem to be most appropriate. It is commonly used when the values of non-standard and unique goods are trying to be estimated. In research described in the article a WTA/WTP concept was used to measure the value of personal data. The main purpose was to identify the differences between results obtained from the survey and from the use of a quasi-experimental method. For that purpose, several quasi-experiments with a real financial incentive (20, 40, 60 PLN; $5, $10, $15) have been introduced. The propensity to sell (or to buy back) the personal data was a subject of examination. Using analysis of proportions (testing differences in two proportions) and comparing the results from the surveys and the quasi-experiments, a set of detailed results was obtained. The comparison revealed visible discrepancies (in some situations statistically significant) between what was declared in the survey and what was shown in the experiment. At the same time, it has been indirectly shown (to some extent) that although surveys are not always the most accurate and reliable way to measure, they still might remain the optimal method of collecting research data due to their good cost-effectiveness ratio.

Pre-komercyjne suszarki węgla brunatnego

94%

Lichota J.

tom Nr 2

66--78

Celem artykułu jest prześledzenia historii budowy suszarek węgla brunatnego począwszy od pierwszej połowy XX wieku aż do chwili obecnej. Pozwala to na zrozumienie obecnego stanu rynku komercyjnego tego typu suszarek. Szczegółowo pokazano suszarkę fluidalną na parę przegrzaną prof. Owena Pottera z Monash University w Australii oraz suszarki typu DWT lub DDWT wytwarzane na terenie Niemiec wschodnich w drugiej połowie XX wieku. Pokazano również schematy suszarki MTE z politechniki TU Dortmund. Wymienione typy suszarek wpłynęły na obecny rynek komercyjny. Zarówno suszarka typu WTA firmy RWE (Niemcy) jak i suszarka typu DryFining firmy GRE Energy (USA) korzystają z pewnych idei technicznych zawartych w poprzednich typach suszarek. Pokazano również nietypowe techniczne pomysły różnych badaczy związanych z rynkiem suszarek.

The purpose of the article time to track the history of the construction of lignite dryers from the first half of the 20th century until the present. This allows the reader to understand the current state of the commercial market of lignite dryers. Article presents details showing a fluidized bed dryer constructed through prof. Owen Potter from Monash University in Australia and driers type of DWT or DDWT produced in East Germany in the second half of the 20th century. Article also shows schema of MTE dryer from University of Dortmund. These types of dryers influenced the current commercial market. Both dryer type WTA from company RWE (Germany) and dryer type DryFining from GRE Energy (USA) use certain technical ideas contained in previous types of dryers. Article also shows unusual technical ideas of different researchers related to the dryers constructions, too.