I emailed to Professors at UCLA. A few of them replied back to my emails. One of them showed considerable interest and asked me to apply for graduate school. After my application, he didn't reply to my emails any more. I was going to another university and finally he got back to me saying that he doesn't have funding for that year, and he is going to nominate me for department fellowship. I received the department fellowship for the first year of my graduate school, which is not very much different from graduate student researcher position. The only difference is that the money comes from department grants, not Professor's grants.