A description of a novel laboratory management software is provided. ScienceLabDatabase (SLD) offers a useful platform to organize a molecular biology research laboratory. The program manages stocks of biological samples, including plasmids, antibodies and cell lines, laboratory protocols and addresses, and it includes an easy ordering and funds managing system. Preformed data sheet templates h...

Measurement of time dependent B d B d mixing at SLD Ming Xiong Liu Yale University December The time dependence of B d B d mixing has been observed in events containing high Pt leptons using a highly inclusive vertexing method to determine the B decay length and boost The initial state B hadron avour is determined using the large froward backward asymmetry provided by the highly polarized elect...

It is by now folklore that the bottom-up evaluation of a program after the “magic set” transformation is “as efficient as” top-down evaluation. There are a number of formalizations of this in the literature. However, the naive formalization is false: As shown by Ross, SLD-resolution can be much more efficient than bottom-up evaluation with magic sets on tail-recursive programs. We show that thi...

We consider a NP-hard problem related to the routing and wavelength assignment (RWA) problem in optical networks, dealing with scheduled lightpath demands (SLDs) with multiplicity. A SLD is a connection demand between two nodes of the network, during a certain time. Each SLD requires a given number of wavelengths (its multiplicity). Given a set of SLDs, we want to assign a lightpath (i.e. a rou...

Young adults with severe disabilities and learning difficulties (SLD) have very limited access to appropriate learning resources. Their unique individual needs and requirements prevent them from accessing traditional methods of online learning, and resources tend not to be age appropriate. The majority of SLD learners has difficulty accessing a computer with standard peripherals such as a mouse...

The lifetimes of B + and B 0 mesons have been measured using a sample of 150,000 hadronic Z 0 decays collected by the SLD experiment at the SLC between 1993 and 1995. The analysis identies the semileptonic decays of B mesons with high (p; p t) leptons and reconstructs the B meson decay length and charge by v ertexing the lepton with a partially reconstructed D meson. This method results in a sa...

Using hadronic ZO decays recorded by the SLD experiment at SLAC, we have measured the vector/ (vector+pseudoscalar) production ratio, V/(V + P), for the prompt charmed mesons, D*+ and D+ Using the channels D*+ ~ D“n$ , Do + Ii–T+, and Do _ li-–T~n–T~ , as well as D+ ~ Ii’– T~T– , we f ind V/(V + P) = 0.61 + 0.09( .stat.) + 0.03(BR), which disfavors the expectation of 0.75 from naive spin-counti...

We report new preliminary B Physics results obtained with 300,000 hadronic Z decays collected by the SLD experiment at the SLC between 1993 and 1997. Three analyses are presented: a measurement of B and B d lifetimes, a study of the time dependence of B s–B 0 s mixing, and a search for decays of the type b → s g. All analyses benefit from the small and stable interaction point and the excellent...

The latest SLD results on light-quark fragmentation and tests of hadronisa-tion models are presented.