We investigate several kinds of regulated rewriting (matrix, ordered, programmed, and variants thereof) and of parallel rewriting mechanisms (Lindenmayer systems, uniformly limited Lindenmayer systems, limited Lindenmayer systems and scattered context grammars) as accepting devices, in contrast with the usual generating mode. In a lot of cases, accepting mode turns out to be exactly as powerful...

Proteins that improperly mature in the endoplasmic reticulum (ER) are dislocated to the cytoplasm for proteasome-mediated destruction. A recent study provides insight into the incompletely understood processes for selection and targeting of aberrant proteins for ER-associated protein degradation. The identification of the ER chaperones GRP94 and BiP as binding partners for the mannose-binding p...

CART peptide is known for having an inhibitory effect on cocaine- and dopamine-mediated actions after acute administration of cocaine and dopamine. In this regard, it is postulated to be a homeostatic, regulatory factor on dopaminergic activity in the nucleus accumbens (NAc). However, there is no data on the effect of CART peptide after chronic administration of cocaine, and this study addresse...

Collective beta cell activity in islets of Langerhans is critical for the supply of insulin within an organism. Even though individual beta cells are intrinsically heterogeneous, the presence of intercellular coupling mechanisms ensures coordinated activity and a well-regulated exocytosis of insulin. In order to get a detailed insight into the functional organization of the syncytium, we applie...

In this talk we present our ongoing and future work towards a multimedia delivery system based on the Internet standard protocols RTSP and RTP. The proposed system consists of several multimedia gateways which provide an adaptation service for mobile clients. The adaptation is done by using different transcoding methods at the gateway which can be loaded at runtime.

Multicellular organisms undergo a complex developmental process, orchestrated by the genetic information in their cells, in order to form a newborn individual from a fertilized egg. This complex process, not completely understood yet, is believed to have a key role in generating the impressive biotic diversity of organisms found on earth. Inspired by mechanisms of Eukaryotic genetic expression,...

RSVP, RTP, RTCP, and RTSP are protocols used to transmit multimedia data through network. This paper is a detailed survey of the four related protocols.

Motivated by natural language analysis we introduce restarting automata with rewriting. They are acceptors on the one hand, and (special) regulated rewriting systems on the other hand. The computation of a restarting automaton proceeds in cycles: in each cycle, a bounded substring of the input word is rewritten by a shorter string, and the computation restarts on the arising shorter word. We sh...

Congestion occurs at a bottleneck along an Internet path; multiple flows between the same sender and receiver can therefore benefit from using only a single congestion control instance when they share the same path. These benefits include the ability to perfectly control the rate allocation between flows. We present a mechanism for coupling congestion control for real-time media that is simpler...