A practical experiment using coincidence techniques is suggested to test the validity of the following concepts:(1) wave packet reduction and(2) the measurement-uncertainty principle for position and momentum. The suggested experiment uses the time-of-flight method to determine an electron's momentum and a coincident photon, emitted from a system excited by the electron, to determine its initial position. It is shown that this method does constitute a simultaneous measurement of position and momentum for a single system. Also, it is pointed out that (...) the traditional statement of the measurementuncertainty principle must be slightly modified even within the Copenhagen interpretation of quantum mechanics. (shrink)

Background Informed consent is a requirement for all research. It is not, however, clear how much information is sufficient to make an informed decision about participation in research. Information on an online questionnaire about childhood development was provided through an unfolding electronic participant sheet in three levels of information. Methods 552 participants, who completed the web-based survey, accessed and spent time reading the participant information sheet (PIS) between July 2008 and November 2009. The information behaviour of the participants was investigated. (...) The first level contained less information than might be found on a standard PIS, the second level corresponded to a standard PIS, and the third contained more information than on a standard PIS. The actual time spent on reading the information provided in three incremental levels and the participants' evaluation of the information were calculated. Results 77% of the participants chose to access the first level of information, whereas 12% accessed the first two levels, 6% accessed all three levels of information and 23% participated without accessing information. The most accessed levels of information were those that corresponded to the average reading times. Conclusion The brief information provided in the first level was sufficient for participants to make informed decisions, while a sizeable minority of the participants chose not to access any information at all. This study adds to the debate about how much information is required to make a decision about participation in research and the results may help inform the future development of information sheets by providing data on participants' actual needs when deciding about questionnaire surveys. (shrink)

How to introduce 'politics' as a specific concept within a deconstructive style of thinking? In order to answer this question, this contribution compares Derrida with Laclau. According to the former the starting-point of a deconstructive style of thinking is différance. It links together the economic detour of homecoming and the relation to otherness. Laclau's analysis of politics as hegemonization within a situation of undecidability presupposes this notion of différance and can therefore be useful in introducing politics within a deconstructive style (...) of thinking. But there still is a major difference between Derrida and Laclau's decisionism: if différance as the relation without relation of economy and otherness cannot avoid decisions based on power in order to stabilize the social, these decisions are always marked by passivity and therefore deconstructible in the name of 'justice' that exceeds politics even if it takes place nowhere but within politics. Key Words: decisionism • . Derrida • . hegemony • . Laclau • . law. (shrink)

Located at the junction of trade routes between Prichernomorje and the Mediterranean, Crimea has always been in the sphere of ethnomigratory processes. Therefore, it is natural that the elements of the Scythian, Greek, Gothic, Hun, Khazar, Kypchak and Turkomyslian cultures influenced the formation of the spiritual and material culture of the Crimean Tatar people. The variety of ethnoses that have changed continuously over the centuries has been reflected in the dialectal structure of the Crimean Tatar language that exists up to (...) the present time. (shrink)