A sample of late Visean limestone from the Wlodawa IG-4 borehole, east Lublin, Poland, yielded a piece tooth and few hundred well-preserved scales comparable to those “Ctenacanthus” costellatus Traquair, 1884 Glencartholm, Scotland, UK. Most are typical compound body ctenacanthid type. Their crowns composed several separate odontodes whose distal ends turned backwards bases characterised by con...

About thirty years ago, I suffered from severe back pain. For some weeks I lay in a body cast, dazed by pain-killers and muscle-relaxants. When I was recovering, I decided one day that I needed exercise. Very gingerly I got on my bike and, feeling rather sorry for myself, rode slowly up Mundy Pond Road. I drew abreast of a group of boys going home from school for lunch. One of them was holding ...

The last decades have been really hungry in new ways to reduce energy consumption. That is especially true when talking about wireless sensor networks in general and home multimedia networks in particular, since electrical energy consumption is the bottleneck of the network. One of the most energy-consuming functional block of an equipment is the radio front end, and methods to switch it off du...

Humans acquire skills in different ways, one of which involves learning from worked-out solutions to problems. In this paper, we present an extension to the ICARUS cognitive architecture that lets it acquire complex hierarchical skills in this manner. Unlike previous work on this topic, our approach relies on an existing architectural mechanism, means-ends analysis, to explain steps in the prob...

In this paper, we review ICARUS, a cognitive architecture that utilizes hierarchical skills and concepts for reactive execution in physical environments. In addition, we present two extensions to the framework. The first involves the incorporation of means-ends analysis, which lets the system compose known skills to solve novel problems. The second involves the storage of new skills that are ba...

A rectangular rod is placed in a flow field flowing parallel to a flat plate. Effect of chord-thickness ratio of rectangular rod on developing vortex shedding downstream to the rod is studied. Then, for each one of the aspect ratios, the distance of the rod from the neighboring flat plate is reduced until the rod sticks to the flat plate. In each case, the effect of the flat plate boundary laye...

dually flat finsler metrics form a special and valuable class of finsler metrics in finsler information geometry,which play a very important role in studying flat finsler information structure. in this paper, we prove that everylocally dually flat generalized randers metric with isotropic s-curvature is locally minkowskian.

let r be a commutative noetherian ring. we study the behavior of injectiveand at dimension of r-modules under the functors homr(-,-) and -×r-.