In the simulation domain, standards have supported interoperable solutions and the development of refined tools. Emerging standards and specifications in the spatial domain are likely to stimulate similar distributed processing systems. Spatial data infrastructures (SDI) allow the access to geographic information using standardized interfaces and web service technologies. Interoperability at th...

The workspace of a spatial 6‐DOF electro‐ hydraulic parallel manipulator is strongly coupled, due to its multi‐closed‐loop kinematic structure and the coupling complicates motion planning and control of the parallel manipulator. This paper clearly analyses the strong dynamic coupling property in the workspace of a spatial 6‐DOF parallel manipulator, using modal decouplin...

Dlocsig is a dynamic spatial locator unit generator written for the Common Lisp Music (CLM) sound synthesis and processing language. Dlocsig was first created in 1992 as a four channel 2d dynamic locator and since then it has evolved to a full 3d system for an arbitrary number of speakers that can render moving sound objects through amplitude panning (VBAP) or Ambisonics. This paper describes t...

This study examines bias (constant error) in spatial memory in an effort to determine whether this bias is defined by a dynamic egocentric reference frame that moves with the observer or by an environmentally fixed reference frame. Participants learned the locations of six target objects around them in a room, were blindfolded, and then rotated themselves to face particular response headings. F...

the spatial dimension into temporally controlled cellular events. and proteins are actively moved around the cell in di-Cambridge, Massachusetts 02138 rected traffic patterns. What is surprising is that in the small (1–3 ␮m) bacterial cell, with no known directed transportation systems, dynamic subcellular localiza-The broad and rich history of prokaryotic biology in the tion of regulatory and ...

We analyze the management of a coastal aquifer under seawater intrusion using distributed control methods. The aquifer’s state is taken as the water head elevation, which varies with time and in space since extraction, natural recharge and lateral water flows vary with time and in space. The water head, in turn, induces a temporalspatial seawater intrusion process, which changes the volume of f...

A high-level ideology and technology will be revealed that can effectively convert any distributed system (manned, unmanned or mixed) into a globally programmable spatial machine capable of operating without central resources. Compact mission scenarios in a special high-level language can start from any point, runtime covering & grasping the whole system or its parts needed, setting operational...

With the rise of GPS-enabled smartphones and other similar mobile devices, massive amounts of location data are available. However, no scalable solutions for soft real-time spatial queries on large sets of moving objects have yet emerged. In this paper we explore and measure the limits of actual algorithms and implementations regarding different application scenarios. And finally we propose a n...

Econometric analysis of convergence processes across countries or regions usually refers to a transition period between an arbitrary chosen starting year and a fictitious steady state. Panel unit root tests and panel cointegration techniques have proved to belong to powerful econometric tools if the conditions are met. When referring to economically defined regions, though, it is rather an exce...

We propose a modular ontology of the dynamic features of reality. This amounts, on the one hand, to a purely spatial ontology supporting snapshot views of the world at successive instants of time and, on the other hand, to a purely spatiotemporal ontology of change and process. We argue that dynamic spatial ontology must combine these two distinct types of inventory of the entities and relation...