Acoustic analysis of an induction motor with viscoelastic bearing supports

The demand for silent bearing applications has resulted in the development of an effective damping layer between the outer ring of a rolling bearing and the surrounding structure. By means of numerical modeling using both FEM and BEM techniques an induction motor for household appliances is analyzed. A hybrid modeling approach combining measured structural velocities with a BEM formulation is used to validate the acoustic model. The numerical results are compared with results obtained from sound intensity measurements estimating the radiated sound power level for a running electric mo tor. It is found that a relatively simple boundary element model is capable of predicting the radiated sound power in a wide frequency range. By using BEM in combination with the radiation modes formulation it is found that a properly designed viscoelastic layer in the vicinity of the bearing is theoretically capable of reducing a fair amount of sound emitted by the motor

Special Update: 2009 Outlook

While the outlook for grantmaking in Minnesota for the remainder of 2009 is not strong - 52% now expect declines in grantmaking during 2009 - grantmakers in Minnesota appear to be faring better than the nation as a whole. Most Minnesota grantmakers say the areas they are most likely to support, in relation to the downturn, are food, housing, and jobs. Most do not anticipate significantly limiting relationships with new grantseekers in 2009

2010 Outlook Report

To assess the outlook for grantmaking in Minnesota in 2010, the Minnesota Council on Foundations (MCF) conducted its 2010 Outlook Report survey in October and November of 2009. The survey asked MCF members and other large grantmakers in the state to predict how their 2010 giving will compare to 2009. In all, 125 organizations responded, representing about 70 percent of annual grantmaking in the state

Giving in Minnesota 2009 Edition Summary

This summary reports highlights of the Minnesota Council on Foundations' Giving in Minnesota, 2009 Edition research report, the most comprehensive analysis of charitable giving in the state. The 2009 edition features Minnesota giving in 2007, the most recent year for which comprehensive data are available. This report includes information about overall giving by foundations, corporations and individuals in Minnesota, along with detailed grantmaking trends by the Giving in Minnesota sample, which is comprised of 100 of the state's largest grantmakers based on grants paid

Giving in Minnesota, 2009 Edition

The Minnesota Council on Foundations has produced its Giving in Minnesota, 2009 Edition research report, the most comprehensive analysis of charitable giving in the state. The 2009 edition features Minnesota giving in 2007, the most recent year for which comprehensive data are available. This report includes information about overall giving by foundations, corporations and individuals in Minnesota, along with detailed grantmaking trends by the Giving in Minnesota sample, which is comprised of 100 of the state's largest grantmakers based on grants paid

Giving in Minnesota, 2010 Edition

The Minnesota Council on Foundations has produced its Giving in Minnesota, 2010 Edition research report, the most comprehensive analysis of charitable giving in the state. The 2010 edition features Minnesota giving in 2008, the most recent year for which comprehensive data are available. This report includes information about overall giving by foundations, corporations and individuals in Minnesota, along with detailed grantmaking trends by the Giving in Minnesota sample, which is comprised of 100 of the state's largest grantmakers based on grants paid

Road pricing and (re)location decisions households

Road pricing policies are, after a cooling down period of a couple of years, again prominently back on the political agenda in the Netherlands. But also in the period of less political interest, research in the field of (road) pricing policies continued in other countries as well as in the Netherlands. Most research literature focuses on the economic and acceptability aspects of pricing policies. The geographical aspects of transport pricing however have received much less attention so far. This paper focuses on possible influences of road pricing policies on residential and work location choice of households. The paper starts with analyzing the importance of transport and location related variables in residential location decisions, when the choice to relocate itself has been made. For this analysis data from a stated choice experiment is used. Choice screens within the experiment consisted of two alternatives. In total, per respondent nine choice screens were shown. Transport related variables within the experiment were commuting travel time, fuel cost and toll cost. The location related variables consisted of the residential environment, the number of bedrooms and the monthly housing costs. Analysis of the results gives insight into the importance of for example toll costs on the final location choice when a decision to relocate itself has already been made. However this type of analysis does not give insight into the number of people who are actually considering changing location when a form of road pricing is introduced. Therefore the second part of the paper continues with analyzing the extent to which people are likely to relocate due to road pricing. The effect of different types of pricing measures and pricing levels on this inclination to relocate are examined. For the analysis, data from a stated preference questionnaire is used. The paper finally concludes with an examination of important explaining variables for moving house or changing job due to road pricing. Some important findings are for example that older people (above 40 years of age), people with a higher income and persons getting a travel cost compensation from their employer are less willing to move due to a pricing measure. People with a higher education level however are more willing to relocate.