If you are interested in visiting the CIS and would be interested in working with me I encourage you to send me an email.
You should address the email to me personally, and indicate which of the research areas I work in you would be interested in working on. Give me an idea of what sort of research you have worked on previously, coursework you found particularly interesting, and an indication of your programming experience. It would also be useful to know which (human) languages you know. Ideally, you would include a full academic CV, but this is not strictly necessary for brief inquiries.
Please also indicate how you will be supported during this period (for instance, several of the students who have visited have had support from the German Academic Exchange Service (DAAD), while others have had fellowships from their home countries).