Update lab_meetings.md

Update lab meeting section

Author: EleGdt

doc/lab_meetings.md

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+## Lab meetings (person in charge: Eleonore Giraudet)
+# Regular lab meeting
+At the moment, they happen every thursday at 10:30. Here you can find the  [calendar](https://docs.google.com/spreadsheets/d/1aIu8WcYoRpC9p3fIiilZWTgR7i03lulYj8B5ZyUW_Qc/edit?gid=6486503#gid=6486503) and [here](https://drive.google.com/drive/folders/1Pb75jpul71mMXiP4fSZGEwK34V5meg12) the main gdrive folder where we archive relevant files. 
+
+# Journal club
+They happen once a month, here you can propose and/or pick up a paper to be discussed. 
+
+# One slide meeting
+The one slide meeting is once a month, the lab is divided in 3 batches [see here] and 1 batch will present alternatively. 
+Each person is invited to present for ~10 minutes 1 slide and the main goal is to update the lab about his/her scientific/project progress.
+
+# Method meeting
+A method meeting does not necessarily happen during the LM schedule, it is called by someone who wants to discuss a specific topic that can be of interest for everyone or only a part of the lab (e.g. a softer package, fMRI analysis, running a tutorial on how to use data management). Attending a method meeting is usually not mandatory if the topic is not of your interest.