Results 61 to 70 of about 1,277,935 (286)
Surprise Volume and Heteroskedasticity in Equity Market Returns [PDF]
Heteroskedasticity in returns may be explainable by trading volume. We use different volume variables, including surprise volume---i.e. unexpected above-average trading activity---which is derived from uncorrelated volume innovations.
Niklas Wagner, Terry A. Marsh
core +3 more sources
A Free Energy Principle for Biological Systems
Entropy, 2012 This paper describes a free energy principle that tries to explain the ability of biological systems to resist a natural tendency to disorder. It appeals to circular causality of the sort found in synergetic formulations of self-organization (e.g., the ...
Friston Karl
doaj +1 more source
ATP13A2 is involved in intracellular polyamine transport in lung epithelial cells
FEBS Open Bio, EarlyView.Spermidine transport in lung epithelial cells involves the polyamine transporter ATP13A2. Cell proliferation is associated with the upregulation of ATP13A2. Polyamines are present in all living cells and are implicated in various crucial cellular processes such as proliferation, apoptosis and autophagy.
Yuta Hatori +8 more
wiley +1 more source
Free-energy Minimization and The Dark Room Problem
Frontiers in Psychology, 2012 Recent years have seen the emergence of an important new fundamental theory of brain function. This theory brings information-theoretic, Bayesian, neuroscientific, and machine learning approaches into a single framework whose overarching principle is the
Karl eFriston +2 more
doaj +1 more source
The Surprise Examination Paradox and the Second Incompleteness Theorem [PDF]
, 2010 We give a new proof for Godel's second incompleteness theorem, based on Kolmogorov complexity, Chaitin's incompleteness theorem, and an argument that resembles the surprise examination paradox.
Kritchman, Shira, Raz, Ran
core +1 more source
FEBS Open Bio, EarlyView.KLK7, a tissue kallikrein‐related peptidase, is elevated in advanced colorectal cancer and associated with shorter survival. High KLK7 levels in ascites correlate with peritoneal metastasis. In mice, KLK7 overexpression increases metastasis. In vitro, KLK7 enhances cancer cell proliferation, migration, adhesion, and spheroid formation, driving ...
Yosr Z. Haffani +6 more
wiley +1 more source
Coffee and Conversation on a surprise topic with Provost Elmore [PDF]
, 2018 Weekly Coffee and Conversation program on a surprise Topic with Provost ElmoreBoston University Howard Thurman Center for Common ...
Boston University Howard Thurman Center for Common Ground
core
HIV‐1 establishes immediate latency in T cells expressing the viral Nef protein
FEBS Open Bio, EarlyView.Nef is a viral protein often omitted from HIV‐1 reporter viruses. Consequently, its role in viral latency is unclear. We developed three novel dual reporter HIV‐1 derivatives that express Nef and allow for detection of latent and productive infection. Using these reporters, we show that Nef does not affect the establishment of immediate viral latency ...
Cindy Lam, Ivan Sadowski
wiley +1 more source
Surprise ecologies: case studies on temporal vulnerability in four North American floodplains
Ecology and Society, 2019 When hazards, such as floods, are collectively experienced as "surprising", this heightens the shock experience and likelihood of disaster, and exacerbates its impact.
Daniel H. de Vries
doaj +1 more source
FEBS Open Bio, EarlyView.Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn +4 more
wiley +1 more source