adds TiB description

docs/source/example_notebooks/analyze_data.ipynb

@@ -205,7 +205,8 @@
    "source": [
     "Identify Time in Bed periods\n",
     "----------------------------\n",
-    "\n"
+    "\n",
+    "Time in Bed identification is implemented in the `paat.detect_time_in_bed_weitz2024` which is based on a bidirectional LSTM models as described by Weitz et al. (under review). Time in bed is detected on a 1min resolution with averaged acceleration values per minute, so it is also possible to apply this algorithm after the data has been resampled. However, note that in this case, you have to adjust the sampling frequency accordingly (e.g., if you have resampled to 1s, then the sample frequency should be 1, if you have resampled to 1min then the sample frequency should be 1/60, etc.)."
    ]
   },
   {