{"action":"created","issue":{"url":"https://api.github.com/repos/incf-nidash/nidm/issues/298","labels_url":"https://api.github.com/repos/incf-nidash/nidm/issues/298/labels{/name}","comments_url":"https://api.github.com/repos/incf-nidash/nidm/issues/298/comments","events_url":"https://api.github.com/repos/incf-nidash/nidm/issues/298/events","html_url":"https://github.com/incf-nidash/nidm/issues/298","id":67568128,"number":298,"title":"Definition of \"Drift Model\" terms","user":{"login":"cmaumet","id":5374264,"avatar_url":"https://avatars.githubusercontent.com/u/5374264?v=3","gravatar_id":"","url":"https://api.github.com/users/cmaumet","html_url":"https://github.com/cmaumet","followers_url":"https://api.github.com/users/cmaumet/followers","following_url":"https://api.github.com/users/cmaumet/following{/other_user}","gists_url":"https://api.github.com/users/cmaumet/gists{/gist_id}","starred_url":"https://api.github.com/users/cmaumet/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cmaumet/subscriptions","organizations_url":"https://api.github.com/users/cmaumet/orgs","repos_url":"https://api.github.com/users/cmaumet/repos","events_url":"https://api.github.com/users/cmaumet/events{/privacy}","received_events_url":"https://api.github.com/users/cmaumet/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/incf-nidash/nidm/labels/nidm-results","name":"nidm-results","color":"f7c6c7"},{"url":"https://api.github.com/repos/incf-nidash/nidm/labels/Terms","name":"Terms","color":"bfdadc"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2015-04-10T10:54:37Z","updated_at":"2015-04-13T10:52:25Z","closed_at":null,"body":"Following #261, this issue is open to curate the definition of the \"Drift Model\" terms (cf. [example of usage](http://htmlpreview.github.io/?https://raw.githubusercontent.com/incf-nidash/nidm/9cd873495390d9dcc8fb42697ddb9fe937fa6f23/doc/content/specs/nidm-results_dev.html#dfn-nidm-designmatrix) in the spec).\r\n\r\nClasses:\r\n - **nidm:DriftModel**: A model used to compensate for low frequency baseline drifts when analyzing functional MRI data at the subject level\r\n  - **afni:LegendrePolynomialDriftModel**: A drift model in which the drifts are modeled by a Legendre orthogonal polynomial basis added to the regression model\r\n  - **fsl:GaussianRunningLineDriftModel**: A drift model in which the drifts are modeled with a Gaussian-weighted running line smoother, fit to and subtracted from the data and each column of the design matrix\r\n  - **spm:DCTDriftModel**: A drift model in which the drifts are modeled by a Discrete Cosine Transform basis added to regression model\r\n\r\nProperties:\r\n - **nidm:hasDriftModel**: A property that associates a drift model to a design matrix (only used for first-level fMRI experiments)\r\n - **afni:driftBasisOrder**: The number of basis in the drift model.\r\n - **fsl:driftCutoffPeriod**: Full Width at Half Maximum in seconds of the Gaussian weight function used in the running line smoother\r\n - **spm:driftCutoffPeriod**: Discrete Cosine Transform basis cut-off, specified as period length in seconds and ensures that all basis elements will have period of this duration or longer"},"comment":{"url":"https://api.github.com/repos/incf-nidash/nidm/issues/comments/92306869","html_url":"https://github.com/incf-nidash/nidm/issues/298#issuecomment-92306869","issue_url":"https://api.github.com/repos/incf-nidash/nidm/issues/298","id":92306869,"user":{"login":"nicholst","id":5155907,"avatar_url":"https://avatars.githubusercontent.com/u/5155907?v=3","gravatar_id":"","url":"https://api.github.com/users/nicholst","html_url":"https://github.com/nicholst","followers_url":"https://api.github.com/users/nicholst/followers","following_url":"https://api.github.com/users/nicholst/following{/other_user}","gists_url":"https://api.github.com/users/nicholst/gists{/gist_id}","starred_url":"https://api.github.com/users/nicholst/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nicholst/subscriptions","organizations_url":"https://api.github.com/users/nicholst/orgs","repos_url":"https://api.github.com/users/nicholst/repos","events_url":"https://api.github.com/users/nicholst/events{/privacy}","received_events_url":"https://api.github.com/users/nicholst/received_events","type":"User","site_admin":false},"created_at":"2015-04-13T10:52:25Z","updated_at":"2015-04-13T10:52:25Z","body":"Hi @satra, I'm not against defining 'temporalFilter' at some point, but that's such a rich, well-used class of things (outside for task-fMRI) I won't want to do it casually.  Given our upcoming release, I'd suggest just sticking with these 'drift models' which can later be assigned a parent term of 'temporalFilter'."}}