From cdshaw@umbilicus.artsci.washington.edu Fri Jul 17 00:09:19 1998 Received: from burdell.cc.gatech.edu (root@burdell.cc.gatech.edu [130.207.3.207]) by lennon.cc.gatech.edu (8.8.4/8.6.9) with ESMTP id AAA03577 for ; Fri, 17 Jul 1998 00:09:17 -0400 (EDT) Received: from wheaten.hitl.washington.edu (qesR+Kui4tOLIZ54enaM7UkOSwWtOZGj@[128.95.73.60]) by burdell.cc.gatech.edu (8.8.4/8.6.9) with ESMTP id AAA15622 for ; Fri, 17 Jul 1998 00:09:16 -0400 (EDT) Received: from umbilicus.artsci.washington.edu (umbilicus.artsci.washington.edu [128.95.248.206]) by wheaten.hitl.washington.edu (8.8.8/8.6.12) with SMTP id VAA04049 for <3d-ui@hitl.washington.edu>; Thu, 16 Jul 1998 21:09:03 -0700 (PDT) Received: (from cdshaw@localhost) by umbilicus.artsci.washington.edu (950413.SGI.8.6.12/8.6.10) id VAA16935 for 3d-ui@hitl.washington.edu; Thu, 16 Jul 1998 21:09:03 -0700 From: Chris Shaw Message-Id: <199807170409.VAA16935@umbilicus.artsci.washington.edu> Subject: Re: right weight and size To: 3d-ui@hitl.washington.edu (3D UI List) Date: Thu, 16 Jul 1998 21:09:03 -0700 (PDT) In-Reply-To: <35AF1CF9.EAB80C22@mic.atr.co.jp> from "Ivan Poupyrev" at Jul 17, 98 02:44:25 am Reply-To: cdshaw@cs.URegina.ca X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Status: RO Ivan, > Try to pick up anything with one chopstick in each hand: nearly impossible > ... BTW, might it be an example when one handed manipulation is more > efficient than two handed one? It is likely that purely mechanical factors can explain this. In the two-handed case, each chopstick is at the end of a 6-joint linkage which is independently operating. There's twice as many degrees of freedom to control than in the one-handed chopstick case. In addition, you're trying to accomplish something with both hands that your dominant hand is very good at -- precision gripping. Also, your non-dominant hand is not so good at this type of thing. -- Chris Shaw University of Regina cdshaw@cs.URegina.ca Assistant Professor http://www.cs.uregina.ca/~cdshaw