The implications of insectsÕ vision for territorial defense have been relatively little studied in the Þeld. In the dragonßy Perithemis tenera Say we investigated whether either the angle at which an intruder was viewed by a territorial resident or the background against which it was viewed affected the detection of that intruder. Residents detected intruders at a greater distance if the intrud...

Patrícia Tavares Ribeiro Fundação Oswaldo Cruz. Escola Nacional de Saúde Pública. Departamento de Ciências Sociais. Rio de Janeiro, RJ, Brasil. Centro de Estudos Políticas e Informação sobre Determinantes Sociais da Saúde. Rio de Janeiro, RJ, Brasil. E-mail: [email protected] Territorial perspective, regionalization and networks: an approach to Federative Republic of Brazil’s health po...

Immunization is a public health area in which the intergovernmental challenges of formulating a national policy are evident. It is also an area in which harmonization of policy across Canada is particularly critical. The National Immunization Strategy was a F/P/T initiative designed to achieve this policy goal. The combination of national guidelines and flexible federal funding via a trust has,...

Neighboring territorial animals are viewed primarily as intense rivals, but there are also opportunities for cooperation among competitors. Many animals respond less aggressively toward neighbors than to strangers. This phenomenon, termed the ‘‘dear enemy’’ effect, should be stable only when the reduced aggression is reciprocal. Territory owners should use conditional strategies in territorial ...

BACKGROUND Besides their neuronal support functions, astrocytes are active partners in neuronal information processing. The typical territorial structure of astrocytes (the volume of neuropil occupied by a single astrocyte) is pivotal for many aspects of glia-neuron interactions. METHODS Individual astrocyte territorial volumes are measured by Golgi impregnation, and astrocyte densities are d...

Although the USA, Canada, UK, and Australia currently retain territorial copyright laws, with commensurate restrictions on parallel, importation of books, advances in digital technology, and the advent of e-books have caused an involuntary migration of the book across these defined borders. This changing publishing sphere has impacted authors’ copyright protection, with authors struggling to co...

Do people create temporary territories in public settings? To address this question, territorial cognitions and behaviors regarding two types of study sites in a library--tables and carrels--were investigated. In the first questionnaire experiment subjects indicated that: carrel sites were more valuable for studying than table sites; they expected they would be more likely to defend a carrel si...

Cooperation during territorial defense allows social groups of African lions to defend access to resources necessary for individual reproductive success. Some forms of cooperation will be dependent upon cognition: reciprocity places greater cognitive demands on participants than does kinship or mutualism. Lions have well-developed cognitive abilities that enable individuals to recognize and int...

The literature on industrial districts (also referred to as business clusters) has grown out of recognition that spatial proximity among firms supports the formation and exchange of knowledge within an industry and is therefore a source of competitive advantage. While such a ‘territorial’ perspective on interfirm relationships is valuable in highlighting the informal means through which firms c...

We used single-photon emission computed tomography to measure cerebral blood flow, cerebral blood volume, and cerebral perfusion reserve and transcranial Doppler sonography with CO, stimulation to assess hemispheric vasomotor reactivity in 37 patients and in normal controls. Computed tomography and magnetic resonance imaging were performed to differentiate morphologically low-flow infarcts (n=1...