Marine mammals constitute ... an integral part of the marine ecosystem usually as top predators. Hunting of cetaceans and pinnipeds for skins, meat and blubber has of course gone on from the earliest recorded times. At various periods ... the hunting of them intensified to the point at which it caused serious depletion. Al­ though accurate records are not available, there is little doubt that m...

Most online feedback mechanisms publish unbiased statistics (usually averages) of past ratings. Such mechanisms fail in environments where the same seller sells products of many different qualities, such as marketplaces of used cars and collectibles. This paper presents a novel feedback management mechanism that succeeds in facilitating efficient transactions in such settings. One particularly ...

Nonlinear hunting speeds of railway vehicles running on a tangent track are analytically obtained using Hopf bifurcation theory in this paper. The railway vehicle model consists of nonlinear primary yaw dampers, nonlinear flange contact stiffness as well as the clearance between the wheel flange and rail tread. Linear and nonlinear critical speeds are obtained using Bogoliubov method. A compreh...

Integration is held to be a key feature of conscious awareness. Some even argue that the latter cannot occur without the former. We tested this claim by presenting masked scenes depicting a person performing an action with a congruent or an incongruent object (e.g., a man pouring coffee into a mug or into a roll of toilet paper). The masked scenes were then followed by briefly flashed targets t...

rijab valley, located in 180 km west of kermanshah, is considered to be one of the tourists centers of kermanshah because of having various landscapes and monuments. however, the results of one of the field studies of 157 tourist subjects show that the majority of the tourists do not know much about all the attractions of the valley. in a way that about 31.2% of the tourists were not aware of t...

Empirical tests of resource-intensification models argue for diminishing foraging efficiency among hunter–gatherers in California over the past 2000 years (Basgall, 1987, Research in Economic Anthropology 9, 21–52; Broughton, 1994a, Journal of Archaeological Science 21, 501–514; 1994b, Journal of Anthropological Anthropology 13, 371–401). The evidence for this long-term trajectory consists of d...

The connection of various viewpoints of a visual dynamic scene can be realised in different ways. We examined if various presentation modes influence scene recognition and cognitive representation type. In the learning phase, participants saw clips of basketball scenes from (a) a single, unvaried viewpoint, or with a change of viewpoint during the scene, whereby the connection was realised (b) ...