This paper presents a collection of path planning algorithms for realtime movement of multiple robots across a Robotic Mobile Fulfillment System (RMFS). Robots are assigned to move storage units to pickers at working stations instead of requiring pickers to go to the storage area. Path planning algorithms aim to find paths for the robots to fulfill the requests without collisions or deadlocks. ...

Virtually all public clouds today are run by single providers, and this creates near-monopolies, inefficient markets, and hinders innovation at the infrastructure level. There are current proposals to change this, by creating open architectures that allow providers of computing and storage resources to compete for tenant services at multiple levels, all the way down to the bare metal. Networkin...

Research in passive acoustic detection and localization of marine mammals has largely focused on isolated cases of single or few individuals. However, many marine mammals, such as dolphins, characteristically aggregate in large pods. In addition, dolphins vocalize frequently, emitting broadband clicks and frequency-modulated whistles, which, coupled with a large number of individuals, further c...

In object based data models complex values such as tuples or sets have no special status and must therefore be represented by objects As a consequence di erent objects may represent the same value i e duplicates may occur This paper contains a study of the precise expressive power required for the representation of complex values in typical object based data models supporting rst order queries ...

Pǎtraşcu (STOC ’10) reduces the 3SUM problem to listing triangles in a graph. In the other direction, we show that if one can solve 3SUM on a set of size n in time n1+ then one can list t triangles in a graph with m edges in time Õ(m1+ t1/3− /3). Our result builds on and extends works by the Paghs (PODS ’06) and by Vassilevska and Williams (FOCS ’10). We make our reductions deterministic using ...

The ‘‘perfect’’ orchestration of training participants, IT and process design is one of the ongoing challenges within blended learning service research and practice. Blended learning services (BLS) offer a great variety of options to design learning processes, overcoming many shortcomings of pure e-learning services and providing better scalability and more advantages for learners than pure fac...

Detailed description of difficulties which may appear in diagnostic mucoviscidosis and the ways their overcoming are reported. The algorithms presented. Principles basic therapy particularities treatment different age groups considered.

Software engineering concerns with wide use of engineering principles to achieve cost-effective software with potentiality to function on real machines. Requirement engineering in software development is more crucial. Everyone agrees that security is difficult. The requirements engineering principles are framed based on an idea that would engage the community overcoming complex problems. Securi...