The role of the hippocampus in spatial cognition is incontrovertible yet controversial. Place cells, initially thought to be location-specifiers, turn out to respond promiscuously to a wide range of stimuli. Here we test the idea, which we have recently demonstrated in a computational model, that the hippocampal place cells may ultimately be interested in a space's topological qualities (its co...

The Great Bank of Guizhou (GBG) is an isolated Late Permian to Late Triassic carbonate platform in the Nanpanjiang Basin of Guizhou Province, southwest China. A faulted syncline exposes a cross section of the platform margin, including a well-preserved Anisian (earliest Middle Triassic) reef complex approximately 1 km wide and 800 meters thick. Geochronologic constraints from associated basin-m...

Abstract. We consider the possibility of using dark matter particle’s mass and its interaction cross section as a smoking gun signal of the existence of a Big Bounce at the early stage in the evolution of our currently observed universe. A study of dark matter production in the pre-bounce contraction and the post bounce expansion epochs of this universe reveals a new venue for achieving the obs...

Three theorems for set functions, closely related to the Ahlswede-Daykin 4-function theorem (4FT), are proved. First, the conclusion of the 4FT is generalized to norms other than the L1 norm. Secondly, a refinement of the 4FT is proved showing that the hypothesis of the 4FT implies a family of inequalities whose sum is the conclusion of the 4FT. Finally, it is also shown that the hypothesis of ...

We present a method to simplify high-detail full-featured digital surface models (DSM) of cities (i.e. containing the heights of trees, cars, buildings, etc.) geometrically in such a way that all relevant features are preserved, whereas noise and superfluous details collapse. The relevance of features is automatically evaluated using a semantically motivated shape detection and serves as constr...

background: pentoxifylline (px) prevents camp breakdown by inhibiting the activity of the camp-phosphatase and presumably, stimulates sperm motion. incubation with px causes hyperactivation of sperm, an important step in achieving fertilization, and leads to changes in membranes associated with sperm capacitation. objective: the purpose of this study was to examine the effects of pentoxifylline...

The documentation of underwater cultural heritage (UCH) is the basis for sustainable maritime development including its protection, preservation, and incorporation in coastal zone management plans. In this study, we present a multidisciplinary, non-intrusive downscale approach UCH implemented on area Aegina Island, Greece, where unique submerged harbour complex preserved. This succeeded obtaini...

Abstract We assess the composition and geometry of four individual rock glaciers in Alaska, Wyoming Colorado by measuring their radio wave speed applying these results to ground-penetrating radar depth corrections dielectric mixing models. Our method includes a correction for subsurface reflector dip angle, which we show can lead an incorrect determination speeds using common midpoint configura...

objective: the present study aims to verify web preservation projects and programs in order to explore their preferred solutions in tackling the technical challenges.   method: a documentary method was used to identify and analyze web-preservation-related literature, including papers, handbooks, web sites and documents. the programs’ persons in charge were also questioned. besides, top web pres...