{"action":"created","issue":{"url":"https://api.github.com/repos/nrc-cnrc/EGSnrc/issues/10","labels_url":"https://api.github.com/repos/nrc-cnrc/EGSnrc/issues/10/labels{/name}","comments_url":"https://api.github.com/repos/nrc-cnrc/EGSnrc/issues/10/comments","events_url":"https://api.github.com/repos/nrc-cnrc/EGSnrc/issues/10/events","html_url":"https://github.com/nrc-cnrc/EGSnrc/issues/10","id":118466662,"number":10,"title":"Correlated sampling issue","user":{"login":"pakoliver","id":15987802,"avatar_url":"https://avatars.githubusercontent.com/u/15987802?v=3","gravatar_id":"","url":"https://api.github.com/users/pakoliver","html_url":"https://github.com/pakoliver","followers_url":"https://api.github.com/users/pakoliver/followers","following_url":"https://api.github.com/users/pakoliver/following{/other_user}","gists_url":"https://api.github.com/users/pakoliver/gists{/gist_id}","starred_url":"https://api.github.com/users/pakoliver/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/pakoliver/subscriptions","organizations_url":"https://api.github.com/users/pakoliver/orgs","repos_url":"https://api.github.com/users/pakoliver/repos","events_url":"https://api.github.com/users/pakoliver/events{/privacy}","received_events_url":"https://api.github.com/users/pakoliver/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"ftessier","id":1444241,"avatar_url":"https://avatars.githubusercontent.com/u/1444241?v=3","gravatar_id":"","url":"https://api.github.com/users/ftessier","html_url":"https://github.com/ftessier","followers_url":"https://api.github.com/users/ftessier/followers","following_url":"https://api.github.com/users/ftessier/following{/other_user}","gists_url":"https://api.github.com/users/ftessier/gists{/gist_id}","starred_url":"https://api.github.com/users/ftessier/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ftessier/subscriptions","organizations_url":"https://api.github.com/users/ftessier/orgs","repos_url":"https://api.github.com/users/ftessier/repos","events_url":"https://api.github.com/users/ftessier/events{/privacy}","received_events_url":"https://api.github.com/users/ftessier/received_events","type":"User","site_admin":false},"milestone":null,"comments":4,"created_at":"2015-11-23T20:34:58Z","updated_at":"2016-01-13T04:27:59Z","closed_at":null,"body":"When calculating doses to spherical cavities with radii on the order of microns, the use of correlated sampling causes the dose to be 2-4% smaller than expected. This discrepancy was observed for monoenergetic photon beams with energies on the order of tens of keV, incident on a cubic phantom with a side length of 2 cm. The amount of discrepancy depends on the energy and medium used. This does not seem to be a problem for larger scoring regions (radii > 10 microns). \r\n"},"comment":{"url":"https://api.github.com/repos/nrc-cnrc/EGSnrc/issues/comments/171162684","html_url":"https://github.com/nrc-cnrc/EGSnrc/issues/10#issuecomment-171162684","issue_url":"https://api.github.com/repos/nrc-cnrc/EGSnrc/issues/10","id":171162684,"user":{"login":"pakoliver","id":15987802,"avatar_url":"https://avatars.githubusercontent.com/u/15987802?v=3","gravatar_id":"","url":"https://api.github.com/users/pakoliver","html_url":"https://github.com/pakoliver","followers_url":"https://api.github.com/users/pakoliver/followers","following_url":"https://api.github.com/users/pakoliver/following{/other_user}","gists_url":"https://api.github.com/users/pakoliver/gists{/gist_id}","starred_url":"https://api.github.com/users/pakoliver/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/pakoliver/subscriptions","organizations_url":"https://api.github.com/users/pakoliver/orgs","repos_url":"https://api.github.com/users/pakoliver/repos","events_url":"https://api.github.com/users/pakoliver/events{/privacy}","received_events_url":"https://api.github.com/users/pakoliver/received_events","type":"User","site_admin":false},"created_at":"2016-01-13T04:27:59Z","updated_at":"2016-01-13T04:27:59Z","body":"Hi Frederic,\r\n\r\nI just wanted to give you a quick update so that you know I’ve seen your message:\r\n\r\nSo far, I’ve only seen the issue in my most complicated input files, which might be hard to follow for anyone but myself. Over the weekend, I ran a test with correlated sampling using a very simple geometry, and I was not able to reproduce the issue. I’d like to run a couple more tests with slightly more complicated simulation geometries to see if I can reproduce the issue there. These tests might take a couple weeks to do, depending on cluster availability.\r\n\r\nPatty\r\n\r\n\r\nOn Jan 8, 2016, at 4:13 PM, Frédéric Tessier <notifications@github.com<mailto:notifications@github.com>> wrote:\r\n\r\n\r\n@pakoliver<https://github.com/pakoliver>, can you send me a minimal sample input file which illustrates the problem?\r\n\r\n—\r\nReply to this email directly or view it on GitHub<https://github.com/nrc-cnrc/EGSnrc/issues/10#issuecomment-170124873>.\r\n\r\n"}}