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Attention:

Due to maintenance, the NSF Public Access Repository (PAR) will be unavailable on Saturday, 10/26 from 8:00 PM ET – 10:00 AM ET on Sunday, 10/27. We apologize for the inconvenience.


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Do you have questions about NSF-PAR content, procedures, or policies? More information is available at NSF's Public Access page and in our Frequently Asked Questions. You may also leave feedback by clicking on this .