𝔖 Bobbio Scriptorium

✦ LIBER ✦

An Isometric Bilateral Shift that is Weakly Supercyclic

✍ Scribed by Rebecca Sanders

Book ID: 105760216
Publisher: SP Birkhäuser Verlag Basel
Year: 2005
Tongue: English
Weight: 131 KB
Volume: 53
Category: Article
ISSN: 0378-620X
DOI: 10.1007/s00020-004-1318-4

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

An example of a Kolmogorov automorphism

An example of a Kolmogorov automorphism that is not a Bernoulli shift

✍ Donald S Ornstein 📂 Article 📅 1973 🏛 Elsevier Science 🌐 English ⚖ 703 KB

Statistical methods for surveillance of

Statistical methods for surveillance of congenital malformations: when do the data indicate a true shift in the risk that an infant is affected by some type of malformation?

✍ Lie, Rolv T. ;Vollset, Stein E. ;Botting, Beverley ;Skjærven, Rolv 📂 Article 📅 1991 🏛 Taylor and Francis Group 🌐 English ⚖ 166 KB

Electronic scanning of focused arrays (P

Electronic scanning of focused arrays (Proof that effect of focusing is to shift the normal ‘far field’ directional pattern of an array from infinity to the focal surface. A problem in development of high-resolution sonars): Welsby, V.G., Journal of Sound and Vibration, Vol 8, No 3 pp 390–394 (Received 1 April 1968) (1184)

📂 Article 📅 1969 🏛 Elsevier Science 🌐 English ⚖ 177 KB

Theta bandwidth determines human visual

Theta bandwidth determines human visual working memory capacity Human visual short term memory (VSTM) is capacity limited1. The neurophysiological basis for this limitation is, however, currently unknown. Here we apply the principle of efficient information transfer, derived from communications theory, to provide a mechanistic account of VSTM capacity. Shannon's information theory states that to increase the capacity of information encoded along a frequency axis, it is more efficient to expand the bandwidth than to increase the transmitted power for a given level of noise2. By applying Shannon's principles to human magnetoencephalography (MEG) recordings of oscillatory activity in the theta band during a VSTM task, we demonstrate that increasing memory load to capacity induces a parametric shift in theta frequency band during the delay period, from 4 to 8 Hz, in a right fronto-parietal network. Critically, we show that an individual's VSTM capacity is proportional to that parametric shift. Thus, the adherence of cortical neuronal oscillations to a fundamental principle of efficient information transfer appears to underlie the limited nature of visual representation in short-term memory.

✍ Moran, R.J.; Strange, B.A.; Campo, P.; Dolan, R.J. 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 142 KB