This paper is concerned with information structures used in rigid formations of autonomous agents that have leaderfollower architecture. The focus of this paper is on sensor/network topologies to secure control of rigidity. We extend our previous approach for formations with symmetric neighbor relations to include formations with leader-follower architecture. Necessary and sufficient conditions...

Three decades after their discovery, the unique long-range structure of quasicrystals still poses a perplexing puzzle. The fact that some ancient Islamic patterns share similar quasi-periodic symmetries has prompted several scientists to investigate their underlying geometry and construction methods. However, available structural models depend heavily on local rules and hence they were unable t...

permeability is a property of porous medium that quantifies rock capacity to transmit fluids. frequently, core based permeability data are not available either because of the borehole conditions or due to the high cost of coring. for these reasons, over the years attempts have been made to estimate permeability by alternative ways. permeability is an elusive parameter in hydrocarbon reservoirs ...

Decentralized control and agent-based modeling techniques are employed to determine optimal spacecraft motion for formations having multifaceted objectives in complex dynamic regimes. Cooperative satellite “agents” share a common objective (high resolution imaging) and simultaneously pursue private goals (minimal fuel usage). An algorithm is developed based on dual decomposition. The solution f...

Proper water resources management requires recognizing and evaluating the factors that affect quantity quality of resources. The Ilam-Sarvak (Upper Cretaceous) Asmari (Oligocene to Miocene) limestone- dolomite formations in Zagros structural belt have formed a promising karst groundwater horizon. In present study, hydraulic relationship between structures Izeh territory northeast Khuzestan prov...

This commentary uses Paul Gilroy’s controversial claim that new technoscientific processes are instituting an ‘end to race’ as a provocation discuss the epistemological transformation of race in algorithmic culture. We situate within context abolitionist agenda against racial-thinking, underscoring relationship between his post-race polemic and post-visual discourse. then challenges studying re...

since hydrocarbon sources have an important role in development of industry and technology, exploration of them has been lionized by human. the seismic reflection method is one of the most applicable investigative methods to identify the hydrocarbon reservoirs, but in some cases this method does not work well because of geology conditions and wave attenuation in depth. thus, some exploration me...

Abstract The Cenomanian Sarvak oil reservoirs are distributed over large areas of the Persian Gulf basin. purpose this study is analyzing geochemical characteristics and their inter-relationships in Gulf, classification samples investigation possible causes genetic difference families. In previous studies, limited reservoir scarce oilfields were studied individually local interpretations made a...