Transmission loss predictions for dissipative silencers of arbitrary cross section in the presence of mean flow

A numerical technique is developed for the analysis of dissipative silencers of arbitrary, but axially uniform, cross section. Mean gas flow is included in a central airway which is separated from a bulk reacting porous material by a concentric perforate screen. The analysis begins by employing the finite element method to extract the eigenvalues and associated eigenvectors for a silencer of infinite length. Point collocation is then used to match the expanded acoustic pressure and velocity fields in the silencer chamber to those in the inlet and outlet pipes. Transmission loss predictions are compared with experimental measurements taken for two automotive dissipative silencers with elliptical cross sections. Good agreement between prediction and experiment is observed both without mean flow and for a mean flow Mach number of 0.15. It is demonstrated also that the technique presented offers a considerable reduction in computational expenditure when compared to a three dimensional finite element analysis

1999 Crop Performance Trials: Corn

This publication reports the performance of entries in the 1999 South Dakota performance trials of conventional and Roundup Ready corn hybrids. Information includes both 1998-99 and 1999 grain yields in bushels per acre; and 1999 test weight, moisture percentages of shelled corn at harvest, final plant populations per acre, and stalk lodge percentages. T hese trials were conducted by the South Dakota State University crop performance testing (CPI) program

2006 Precision Planted Performance Trials: Corn

Performance of entries in the 2006 South Dakota corn hybrid performance trials for both non-Roundup-Ready and RoundupReady ™ hybrids is reported. Information includes both the most recent 2-year and 1-year grain yields in bushels per acre and 1-year bushel weight, grain moisture at harvest, percent stand at harvest, and stalk lodge percentages. These performance trials are conducted by the South Dakota Crop Performance Testing ( CPT ) program at South Dakota State University

2003 Precision Planted Performance Trials: Corn

This publication reports the performance of entries in the 2003 South Dakota corn hybrid performance trials for both non-Roundup-Ready and Roundup-Ready hybrids. Information includes both the most recent 2-year and 1-year grain yields in bushels per acre; and 1-year bushel weight, moisture percentages of shelled corn at harvest, acre harvest population, and stalk lodging percentages. These performance trials are conducted by the South Dakota Crop Performance Testing ( CPT) program at South Dakota State University

1998 Crop Performance Trials: Corn

This report evaluates the performance of entries in the 1998 South Dakota corn hybrid performance trials. Information includes both 1997-98 and 1998 grain yields in bushels per acre (bu/ac); and 1998 test weight, moisture percentages of shelled corn at harvest, final plant populations per acre, and stalk lodge percentages. T hese trials were conducted by the South Dakota State University crop performance testing ( CPT) program

2000 Corn Performance Trials: Corn

This publication reports the performance of entries in the 2000 South Dakota corn hybrid performance trials. It includes both conventional (non-Roundup-Ready) and Roundup-Ready hybrids. Information includes both 1999-00 and 2000 grain yields in bushels per acre; and 2000 test weight, moisture percentages of shelled corn at harvest and stalk lodge percentages. Test trials are conducted by the South Dakota State University Crop Performance Testing (CPT) program

2004 Precision Planted Performance Trials: Corn

This publication reports the performance of entries in the 2004 South Dakota corn hybrid performance trials for both non-Roundup-Ready™ and Roundup-Ready™ hybrids. Information includes both the most recent 2-year and 1-year grain yields in bushels per acre (bu/ac); and 1-year bushel weight, moisture percentages of shelled corn at harvest, acre harvest population, and stalk lodge percentages. These performance trials are conducted by the South Dakota Crop Performance Testing ( CPT ) program at South Dakota State University

2001 Crop Performance Trials: Corn

This publication reports the performance of entries in the2001 South Dakota corn hybrid performance trials and includes both conventional (non-Roundup-Ready) and Roundup-Ready hybrids. Bushels per acre (bu/a) are given for both 2000-01 and 2001 grain yields; and test weight, moisture percentages of shelled corn at harvest, and stalk lodge percentages are presented for 2001. These performance trials are conducted by the South Dakota Crop Performance Testing (CPT) program at South Dakota State University

Oocyte cryopreservation as an adjunct to the assisted reproductive technologies

The document attached has been archived with permission from the editor of the Medical Journal of Australia. An external link to the publisher’s copy is included. See page 2 of PDF for this item.Keith L Harrison, Michelle T Lane, Jeremy C Osborn, Christine A Kirby, Regan Jeffrey, John H Esler and David Mollo