2. Also, if he/she is a member of your team, you should be knowing before it gets published. The pubmed search applies only if in case you are the alumni of that particular team or if the group is very big.
Following on researchgate sometimes don't work because the articles are not added up ASAP here. But yes, I agree with Tamer that following the alert on google scholar works better.
It depends, for example, in some Universities and organizations (such as in USDA), the publication of their employee usually listed with their profiles. So, if you know where your friends are working, you can just go to the institute's website and search for it. Otherwise, you can do the suggestions as other members mentioned above.
the best way to go for activation of Alarm which you can do through following that scientist, as an example in research-gate it will acknowledge any updated made that scientist automatically..you can choose google scholar and so on...
Certainly, there are diverse avenues to explore this issue. Probably the most rapid is to ask this question directly to the individual you are interested in, if possible. However, that approach is not always reliable so I suggest you to double check the usual bibliographic databases available in the net as other members have already mentioned.