HGS Board Member Named Chairman Argeris N. Karabelas, a Human Genome Sciences board member, will become chairman Oct. 17, the company said Monday.&lt;br&gt;&lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2" color="#666666"&gt;&lt;B&gt;-TheWashington Post&lt;/b&gt;&lt;/font&gt;