Purpose – The city can be viewed from many perspectives. In this article the author’s perspective will be the city as knowledge tool. In the knowledge economy it might be argued that one of the most essential dimensions will be the relational as well as organizational dimensions, such as a city. The city is the larger context, or structural capital surrounding the human capital, for the value c...

Given the rapid advances in unmanned aerial vehicles, or drones, and increasing need to monitor at a city level, one of the current research gaps is how to systematically deploy drones over multiple periods. We propose a real-time data-driven approach: we formulate the first deterministic arc-inventory routing problem and derive its stochastic dynamic policy. The policy is expected to be of gre...

The capability to build nuclear weapons is a key national security factor that has a profound influence on the balance of international relations. In addition to longstanding players, regional powers and peripheral countries have sought for ways of acquiring and/or developing them. The authors postulate that to express the capabilities, relative positions, and interrelations of the countries in...

Mobile ad hoc networks represent a special class of dynamic networks. Here nodes act as both hosts and routers whereby the routing protocol forms the backbone of such networks. Mobile ad hoc networks are constrained by bandwidth, energy and ever changing topologies. Thus to conserve some of these scarce resources, a few nodes may stop cooperation. In this paper we model a dynamic noncooperative...

A multi-agent approach to solving dynamic Traveling Salesman Problem (TSP) is presented. In the dynamic version of TSP cities can be dynamically added or removed. Proposed multi-agent approach is based on the Sensitive Stigmergic Agent System model refined with new type of messages between agents. The agents send messages every time a change occurs, for instance, when an agent observes that a c...

In this paper, we introduce GENOSIM: Genetic Optimizer for Traffic Micro-simulation Models. GENOSIM is developed as a pilot software, employing state of the art combinatorial parametric optimization to automate the tedious task of calibrating traffic microscopic simulation models. The employed global search technique, Genetic Algorithms, is integrated with a dynamic traffic microscopic simulati...

Autonomous navigation systems are important to Military Operations on Urbanized Terrain (MOUT) simulations for generating realistic tactical behaviours for the non-player characters (or bots). In this paper, we describe our work on Quartz, an autonomous navigation system for MOUT simulations. Novel features of Quartz include qualitative spatial representation and hierarchical spatial reasoning ...

The SSRL is investigating an accelerator upgrade project to replace the present 130 nm·rad FODO lattice with an 18 nm·rad double bend achromat lattice: SPEAR 3. In this paper, we review the methods used to maximize the SPEAR 3 dynamic aperture including optimization of linear optics, betatron tune, chromaticity and coupling correction, and effects of machine errors and insertion devices. Presen...

seismic refraction and downhole survey were employed to study dynamic characteristics of subsurface materials in bam city, southeast of iran. the data acquisition was performed at 160 p and s-wave refraction stations and 15 boreholes in the city. to derive velocity depth sections along these profiles as well as to perform downhole diagrams, seisimager software was used. based on the obtained va...

Objectives: Researchers have focused their attention on balance in the elderly because there is a significant correlation between balance and fall. Therefore, it is very important to identify the factors that can affect elderly balance. The aim of this study was to investigate relation between sustained attention and balance in elderly. Methods: This cross sectional study was conducted in 20...