We report on a high-statistics search for the Θ(1540) + resonance in Σ − -nucleus collisions at 340 GeV/c . No evidence for this resonance was found in our data sample which contains 13 millions K 0 s → π + π − decays above background. For the decay channel Θ + → K 0 s p and the kinematic range xF > 0.05 we find the production cross section to be BR(Θ + → K 0 s p) • σ0 < 1.8 µb per nucleon at 99% CL.

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We report on a measurement of the differential cross sections of inclusive K ± 890 production in Σ − , π − and neutron beams. A strong leading particle effect was observed for K − 890 production by Σ − . The measured xF -distributions are compared with calculations based on the Lund model (PYTHIA) and the quark-gluon string model. a Supported by Deutsche Forschungsgemeinschaft, contract number DFG 436 RUS 113/465/0-2(R), and Russian Foundation for Basic Research under contract number RFFI 00-02-04018 b Now at TRIUMF,

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We present a novel Reliable, Real-time Routing protocol (3R) based on multipath routing for highly time-constrained Wireless Sensor and Actuator Networks (WSANs). The protocol consists of a newly designed routing metric and a routing algorithm utilizing this metric. Our routing metric enables strong Quality-of-Service (QoS) support based on parallel transmissions which significantly reduces transmission delays in WSANs. A routing algorithm utilizing this metric is presented based on Dijkstra's shortest path. A novel Medium Access Control (MAC) layer that supports dynamical adjustments of retransmission limits, reduces traffic overhead in multipath routing protocols. Thorough simulations have been performed to evaluate the routing protocol, and the results show that real-time performance of WSANs can be vastly improved.