Some new spiders from Florida

journal articleHerein are described a number of new species of spiders which have been collected in Florida during the last several years. One new species from Oklahoma is also included. The types are deposited in the University of Utah collection; paratypes, where present, are in the collection of W. M. Barrows

A New Prairie Spider

Author Institution: Department of Zoology and Entomology, Ohio State Universit

Additions to the List of Ohio Spiders. I.

Author Institution: Department of Zoology and Entomology Ohio State Universit

Time Domain Partitioning of Electricity Production Cost Simulations

Production cost models are often used for planning by simulating power system operations over long time horizons. The simulation of a day-ahead energy market can take several weeks to compute. Tractability improvements are often made through model simplifications, such as: reductions in transmission modeling detail, relaxation of commitment variable integrality, reductions in cost modeling detail, etc. One common simplification is to partition the simulation horizon so that weekly or monthly horizons can be simulated in parallel. However, horizon partitions are often executed with overlap periods of arbitrary and sometimes zero length. We calculate the time domain persistence of historical unit commitment decisions to inform time domain partitioning of production cost models. The results are implemented using PLEXOS production cost modeling software in an HPC environment to improve the computation time of simulations while maintaining solution integrity