How quickly can a listener focus on a single tonal cue that indicates the frequency of an upcoming signal? Initial measurements were made with frequency uncertainty (signal frequency varies randomly from trial to trial) and with certainty (same frequency on all trials). Measured by a yes-no procedure, thresholds for 40- and 20-ms signals presented in continuous broadband noise at 50 dB SPL were...

In this paper we study differential detection of binary differential phase shift keyed (DPSK) signals with several impairments typical in satellite communication systems. In pariicjlar; the bit error rate is determined for bit timing error and frequency offset error at the receiver. The effect of a hard-limiting, band-limited repeater is also considered. The differential detector performance is...

Institutions in the History of Chile (1820 – 1925) Samuel Tschorne V. Universidad Adolfo Ibañéz Introduction The objective of this paper is to make a meaningful contribution to the debate over the importance of institutions and law in the political history of Chile during the 19 century. It is commonly held that in Chile there is a majoritarian opinion according to which we enjoy an exceptional...

risks mean cases of uncertainty of project, the impact of which is realized as a threat (negative aspect) and/or opportunity (positive aspect). the traditional viewpoint on risk is a negative viewpoint that implies damages, loss and harmful consequences. judgments such as this on risk merely emphasize on risks management and pay less attention to opportunities management. it is clear that some ...

It is generally assumed that if it is possible to believe that p without believing that q, then there is some difference between the object of the thought that p and the object of the thought that q. This assumption is challenged in the present paper, opening the way to an account of epistemic opacity that improves on existing accounts, not least because it casts doubt on various arguments that...

We examined the attentional demands of the preparation process that intervenes a warning stimulus (S1) and a subsequent reaction stimulus (S2). Twelve participants performed a reaction task with a variable S1–S2 interval both with and without concurrent memory load that served to deplete attentional resources. We found that memory load did not modify the effect of the S1-S2 interval on reaction...

Estimation of rainfall quantile is an important step in regional frequency analysis for planning and design any water resources project. Related evaluations accuracy uncertainty help to further assist enhancing the reliability estimates. In this study, therefore, we investigate extreme computed from genetic algorithm-based clustering. Uncertainty assessment explored with prediction quantiles a ...