How has Professor Sergey V. Buldyrev established himself as a prominent figure in his field?
By publishing over 280 papers in refereed journals and making significant contributions through his research and publications.
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### Instruction:
How has Professor Sergey V. Buldyrev established himself as a prominent figure in his field?

### Input: Not applicable

### Response:
By publishing over 280 papers in refereed journals and making significant contributions through his research and publications.<|im_end|>