Brain Weight and Life-Span in Primate Species

In haplorhine primates (tarsiers, monkeys, apes, and humans), there is a significant correlation between brain weight and maximum life-span when the effect of body size is removed. There is also a significant correlation in haplorhine primates between brain weight and female age at first reproduction. For strepsirhine primates (lorises and lemurs), there are no significant correlations between brain weight and either life-span or female reproductive age when the effect of body size is removed. This lack of correlation in strepsirhine primates may be related to the fact that these primates are nocturnal and/or natives of the island of Madagascar, both of which conditions may reduce competition for resources and predation pressure. These findings suggest that in haplorhine primates the genetic systems controlling brain growth are linked to the systems governing the life cycle so that species with longer cycles have larger brains. When the effect of body weight is removed, leaf-eating haplorhines have significantly smaller brains and shorter lives than haplorhines with other diets. Harem-living haplorhines also have significantly smaller brains and shorter life-spans than troop-living haplorhines when the effect of body weight is removed. We also sought to test the rate-of-living hypothesis by determining whether primates with basal metabolic rates that are higher than would be expected for their body size have shorter maximum life-spans than would be expected for their body size. Metabolic rate is not correlated with life-span or female age at first reproduction when the effect of body size is removed

Does State Growth Management Change the Pattern of Urban Growth? Evidence From Florida.

This paper evaluates growth management in Florida by using a land use based regional adjustment model to project adjustments toward equilibrium densities of population and employment at the county level. The analysis utilizes a unique data set that contains detailed information on initial outcomes of the 1992 plan review in the State of Florida. These plan review outcomes are interacted with adjustment variables to test the hypothesis that Growth Management-specific policies have affected equilibrium adjustments in the following time period. The analysis is motivated by three specific research questions: Has Florida’s (1985) Growth Management Act increased changes in density during any of the three year time periods? Does plan compliance affect the growth trajectories of approved counties? And, finally, does the inclusion of optional plan elements further affect these growth trajectories? The findings suggest that compliance with state growth management mandates in Florida may push the adjustment process toward higher population densities in the1992-1997 time period. Additionally, the inclusion of an optional educational plan element may also push adjustments toward higher density. The results indicate that growth management efforts to address the technical planning process, as well as human capital needs, can increase the desirability, and thus the density, of sprawling counties in the Atlantic Southeast. Finally, because population and employment growth are jointly determined in the Atlantic Southeast, the long-term sustainability of economic development in Florida may depend on policies that preserve its desirability as a place to live. This paper elaborates upon work by Carruthers, McLaughlin, and Boarnet (2006) that shows Florida’s growth trajectory during the early 1990’s was significantly different than the Atlantic Southeast region.

NEW DEVELOPMENTS IN GROCERY MANUFACTURER AND DISTRIBUTOR MARKETING PROGRAMS: A SURVEY OF U.S. WHOLESALERS AND RETAILERS

The retail food industry has taken initiatives to improve cost and to return the focus of management to the consumer. Among these initiatives are Efficient Consumer Response (ECR) and category management. A mail questionnaire elicited perceptions on these issues from 95 executives among U.S. food wholesalers and retailers. This study found that ECR category management are being used to streamline costs and to remove logistical inefficiencies. Although it is widely recognized that category management provides a consumer focus, distributors seemingly brush aside tactics that target individual customers in favor of efforts that target logistical efficiency.Agribusiness, Marketing,

On the periodicity of oscillatory reconnection

Context. Oscillatory reconnection is a time-dependent magnetic reconnection mechanism that naturally produces periodic outputs from aperiodic drivers. Aims. This paper aims to quantify and measure the periodic nature of oscillatory reconnection for the first time. Methods. We solve the compressible, resistive, nonlinear magnetohydrodynamics (MHD) equations using 2.5D numerical simulations. Results. We identify two distinct periodic regimes: the impulsive and stationary phases. In the impulsive phase, we find the greater the amplitude of the initial velocity driver, the longer the resultant current sheet and the earlier its formation. In the stationary phase, we find that the oscillations are exponentially decaying and for driving amplitudes 6.3−126.2 kms−1, we measure stationary-phase periods in the range 56.3−78.9 s, i.e. these are high frequency (0.01−0.02 Hz) oscillations. In both phases, we find that the greater the amplitude of the initial velocity driver, the shorter the resultant period, but note that different physical processes and periods are associated with both phases. Conclusions. We conclude that the oscillatory reconnection mechanism behaves akin to a damped harmonic oscillator

Expanding to the Edges: Central Numic Dual Number

The Central Numic (Uto-Aztecan) dual number marking system on nouns and pronouns is of interest because even though most of the component morphemes involved in the system are reconstructible to Proto-Numic, the system itself is not. Indeed, while the reconstructible Proto-Numic system is rudimentary, the Central Numic system is robust and has expanded to the point that there are few environments where dual is not marked on equal footing with singular and plural. The Central Numic system is of further interest because it involves cycles of grammaticalization and not just a single diachronic event. This contrasts with the other two branches of Numic, Western and Southern, where the very rudimentary Proto-Numic dual number has been maintained and only minimally expanded. The tarpaper shack of Proto-Numic dual marking is now the steel-and-glass high-rise of Central Numic dual marking