Mammalian phylogeny is far too asymmetric for all contemporaneous lineages to have had equal chances of diversifying. We consider this asymmetry or imbalance from four perspectives. First, we infer a minimal set of 'regime changes'-points at which net diversification rate has changed-identifying 15 significant radiations and 12 clades that may be 'downshifts'. We next show that mammalian phylog...

Our sense of depth perception is mediated by spatial filters at different scales in the visual brain; low spatial frequency channels provide the basis for coarse stereopsis, whereas high spatial frequency channels provide for fine stereopsis. It is well established that monocular blurring of vision results in decreased stereoacuity. However, previous studies have used tests that are broadband i...

Independent channels respond to both the spatial and temporal characteristics of visual stimuli. Gratings <3 cycles per degree (cpd) are sensed by transient channels that prefer intermittent stimulation, while gratings >3 cpd are sensed by sustained channels that prefer steady stimulation. From this we predict that adaptation to a spatially uniform flickering field will selectively adapt the tr...

Based on the “double carbon” goal, this paper constructs an evaluation index system for coordinated development of urban and ecological environments, using entropy method coupling coordination degree model to analyze spatio-temporal differentiation characteristics urbanization environment in 16 cities Anhui Province from 2010 2020 uses ArcGIS software draw spatial distribution relationship betw...

Mobile computers use wireless channels to communicate with other computers. Ef-cient channel allocation is at the heart of the design of an eecient mobile computing system. The nite number of channels should be eeciently allocated to maximize throughput and avoid co-channel interference. Temporal variations in channel demand require channel allocation to adapt dynamically to the changing demand...

Mobile computers use wireless channels to communicate with other computers. Ef-cient channel allocation is at the heart of an eecient mobile computing system. The nite number of channels should be eeciently allocated to maximize throughput and to avoid co-channel interference. Temporal variations in channel demand (load) require channel allocation to adapt dynamically to the changing demand. Th...

background and aim: the elderly afflicted with hearing loss experience the consequent problems of falling and imbalance. some rea­sons have been reported for the relationship between hearing loss and imbalance. however, a large part of the population of the elderly does not experience hearing assessments and if such assessments are done, the right rehabilitation services are not offered. this s...