{ "id": 438546, "title": "Timestamps are a poor proxy for daylight?", "url": "/competitions/child-mind-institute-detect-sleep-states/discussion/438546", "author_name": "Quillen", "post_date": "2023-09-11T16:48:58.982000", "votes": 4, "comment_count": 3, "views": 0, "content": "

Food for thought:

\n

In NYC, there are 6 more hours of sunlight at summer solstice than winter solstice. Clearly, the clock is a poor indicator of sunrise/sunset whether or not you use DST. Even with DST, sunrise and sunset vary by 2 and 4 hours respectively throughout the year.

\n

If we want to capture information about \"natural\" circadian rhythms, maybe it's worth engineering a feature that accurately portrays the amount of sunlight?

\n

On the other hand, NYC is full of artificial lighting and screens are a ubiquitous source of blue light. So perhaps timestamps are a good enough proxy for daylight in a modern urban environment ?

\n

See this website if you want to play around with visuals of sun vs. clock time.
\n\"\"

", "messages": [ { "id": 2433554, "postDate": "2023-09-11T16:48:58.983Z", "content": "

Food for thought:

\n

In NYC, there are 6 more hours of sunlight at summer solstice than winter solstice. Clearly, the clock is a poor indicator of sunrise/sunset whether or not you use DST. Even with DST, sunrise and sunset vary by 2 and 4 hours respectively throughout the year.

\n

If we want to capture information about \"natural\" circadian rhythms, maybe it's worth engineering a feature that accurately portrays the amount of sunlight?

\n

On the other hand, NYC is full of artificial lighting and screens are a ubiquitous source of blue light. So perhaps timestamps are a good enough proxy for daylight in a modern urban environment ?

\n

See this website if you want to play around with visuals of sun vs. clock time.
\n\"\"

", "rawMarkdown": "**Food for thought:**\n\nIn NYC, there are 6 more hours of sunlight at summer solstice than winter solstice. Clearly, the clock is a poor indicator of sunrise/sunset whether or not you use DST. Even with DST, sunrise and sunset vary by 2 and 4 hours respectively throughout the year.\n\nIf we want to capture information about \"natural\" circadian rhythms, maybe it's worth engineering a feature that accurately portrays the amount of sunlight?\n\nOn the other hand, NYC is full of artificial lighting and screens are a ubiquitous source of blue light. So perhaps timestamps are a *good enough* proxy for daylight in a modern urban environment ?\n\nSee [this website](https://www.timeanddate.com/sun/usa/new-york) if you want to play around with visuals of sun vs. clock time.\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F8650491%2Fb705a8f6c9d88ac14412ca009eff9523%2Fsungraph.jpg?generation=1694374138797547&alt=media)", "votes": 4 }, { "id": 2435908, "postDate": "2023-09-13T08:48:26.977Z", "content": "

If you use the Python library \"PyEphem\", you can input the time, latitude and longitude, and output the sunrise and sunset times (including the moon).

", "rawMarkdown": "If you use the Python library \"PyEphem\", you can input the time, latitude and longitude, and output the sunrise and sunset times (including the moon).", "votes": 1 }, { "id": 2434213, "postDate": "2023-09-12T06:42:59.210Z", "content": "

Quite an interesting view. Would love to see the takes of an experienced or Competition Author on this. Thank you for sharing!

", "rawMarkdown": "Quite an interesting view. Would love to see the takes of an experienced or Competition Author on this. Thank you for sharing!" }, { "id": 2433608, "postDate": "2023-09-11T17:15:55.893Z", "content": "

Very interesting. Thank you for sharing @quillen

", "rawMarkdown": "Very interesting. Thank you for sharing @quillen ", "isDeleted": true } ], "comments": [ { "id": 2435908, "author_name": "mh", "author_url": "", "post_date": "2023-09-13T08:48:26.977000", "content": "

If you use the Python library \"PyEphem\", you can input the time, latitude and longitude, and output the sunrise and sunset times (including the moon).

", "votes": 1, "replies": [] }, { "id": 2434213, "author_name": "TheChessEngineer", "author_url": "", "post_date": "2023-09-12T06:42:59.210000", "content": "

Quite an interesting view. Would love to see the takes of an experienced or Competition Author on this. Thank you for sharing!

", "votes": 0, "replies": [] }, { "id": 2433608, "author_name": "Bhargav Kowshik", "author_url": "", "post_date": "2023-09-11T17:15:55.893000", "content": "

Very interesting. Thank you for sharing @quillen

", "votes": 0, "replies": [] } ], "raw_markdown_by_id": { "2433554": "**Food for thought:**\n\nIn NYC, there are 6 more hours of sunlight at summer solstice than winter solstice. Clearly, the clock is a poor indicator of sunrise/sunset whether or not you use DST. Even with DST, sunrise and sunset vary by 2 and 4 hours respectively throughout the year.\n\nIf we want to capture information about \"natural\" circadian rhythms, maybe it's worth engineering a feature that accurately portrays the amount of sunlight?\n\nOn the other hand, NYC is full of artificial lighting and screens are a ubiquitous source of blue light. So perhaps timestamps are a *good enough* proxy for daylight in a modern urban environment ?\n\nSee [this website](https://www.timeanddate.com/sun/usa/new-york) if you want to play around with visuals of sun vs. clock time.\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F8650491%2Fb705a8f6c9d88ac14412ca009eff9523%2Fsungraph.jpg?generation=1694374138797547&alt=media)", "2435908": "If you use the Python library \"PyEphem\", you can input the time, latitude and longitude, and output the sunrise and sunset times (including the moon).", "2434213": "Quite an interesting view. Would love to see the takes of an experienced or Competition Author on this. Thank you for sharing!", "2433608": "Very interesting. Thank you for sharing @quillen " } }