{"action":"opened","issue":{"url":"https://api.github.com/repos/incf-nidash/nidm/issues/257","labels_url":"https://api.github.com/repos/incf-nidash/nidm/issues/257/labels{/name}","comments_url":"https://api.github.com/repos/incf-nidash/nidm/issues/257/comments","events_url":"https://api.github.com/repos/incf-nidash/nidm/issues/257/events","html_url":"https://github.com/incf-nidash/nidm/issues/257","id":59229617,"number":257,"title":"Definition of \"center of gravity\"","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":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-02-27T12:22:22Z","updated_at":"2015-02-27T12:22:22Z","closed_at":null,"body":"This is a proposal to expand the definition of `fsl:CenterOfGravity`:\r\n\r\n\"Centre of gravity of the cluster, equivalent to the concept of Centre Of Gravity for a object with distributed mass, where intensity substitutes for mass in this case. **The coordinate of the centre of gravity is the weighted average of the coordinates by the intensities within the cluster** (definition from http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/Cluster)\"\r\n\r\n(The expanded part of the definition also comes from http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/Cluster)."}}