This paper studies global stability of spatial configurations in a dynamic two-region model with quadratic adjustment costs where rational migrants make migration decisions so as to maximize their discounted future utilities. A global analysis is conducted to show that, except for knife–edge cases with symmetric regions, there exists a unique spatial configuration that is absorbing and globally...

recent increased islamic awakening in many muslim societies, have given a momentum to rise of contextual necessity for islamic culture. as religion and way of life, islam framed in city. city morphology according to islamic ideology has brought interest to the discussion among the specialists and professionals involved in muslim world for many decades, particularly in iran. this goal can be ach...

This paper discusses the spatial configuration between objects and a route which an agent follows according to instructions in a navigation task. We claim that a route can be regarded as a reference object and thereby two types of perspective system are defined; the route-centered perspective system and the position-centered perspective system. The route-centered perspective system is presented...

Matching two representations against one another is central to many applications, e.g., matching observation against models in object or scene recognition or matching a local perception against a global map in self-localization if a mobile robot. In both examples, spatial information structures are associated, i.e., the representation includes spatial arrangement information of individual parts...

This paper describes a method for qualitatively representing and reasoning about spatial configurations of planar mechanisms. The method has direct relevance to, and implications for, computer-aided mechanism design and robotics. In particular, it can be used to solve spatial configuration problems where exact geometric knowledge is not available, and to provide guidance for the application of ...

A parabolic stochastic PDE is studied analytically and numerically, when a bi-furcation parameter is slowly increased through its critical value. The aim is to understand the effect of noise on delayed bifurcations in systems with spatial degrees of freedom. Realisations of the nonautonomous stochastic PDE remain near the unstable configuration for a long time after the bifurcation parameter pa...

The wave functions in the diquark-quark model for baryons are modified to take into account the effect of the different masses of the quarks in diquark formation. A spatial wave function is introduced multiplying each flavour-spin configuration in the quark-diquark model. Futhermore a numerical coefficient is introduced which weighes the contribution of each configuration.

Landscape organized (or structured) heterogeneity influences hydrological and biogeochemical patterns across space time. We developed landscape indices that describe the spatial configuration of nutrient sources sinks as a function their distance to stream (lateral dimension) or outlet (longitudinal intersection with flow-accumulation areas. Using monthly nitrate, total phosphorus (TP), soluble...