Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!husc6!mit-eddie!ll-xn!ames!ucbcad!ucbvax!xios.UUCP!dave From: dave@xios.UUCP (Keeper of SDN) Newsgroups: comp.society.futures Subject: Help!! Message-ID: <8711061501.AA11431@xios.UUCP> Date: Fri, 6-Nov-87 10:01:57 EST Article-I.D.: xios.8711061501.AA11431 Posted: Fri Nov 6 10:01:57 1987 Date-Received: Sat, 14-Nov-87 04:29:39 EST Sender: daemon@ucbvax.BERKELEY.EDU Organization: The ARPA Internet Lines: 121 I seem to be getting alot of messages lately similar to the following. I don't understand why these messages are coming to me. I am fairly new at being mail/news administrator so any help in getting this figured out would be greatly appreciated. Thanx in advance, Dave Guthmann xios!dave =========================================================================== >From nrcaer!bnr-vpa!utgpu!ai.toronto.edu!ubc-vision.uucp!uunet!BUACCA.BU.EDU!BOSTONU.BITNET!POSTMAST Thu Nov 5 20:16:49 1987 Received: by xios.UUCP (4.12/smail2.2/02-24-87) id AA05985; Thu, 5 Nov 87 20:16:53 est Received: from utgpu with uucp; Thu, 5 Nov 87 06:24:31 Received: from ai.toronto.edu by gpu.utcs.toronto.edu via ETHER with SMTP id AA17365; Thu, 5 Nov 87 06:24:31 EST Received: from ubc-vision by ai.toronto.edu via X.25 with UUCP id AA13274; Thu, 5 Nov 87 06:22:04 EST Received: by ubc-vision.UUCP id AA28764; Thu, 5 Nov 87 03:19:33 pst Received: from BUACCA.BU.EDU by uunet.UU.NET (5.54/1.14) id AA01134; Thu, 5 Nov 87 00:59:52 EST Message-Id: <8711050559.AA01134@uunet.UU.NET> Received: from BOSTONU.BITNET by BUACCA.BU.EDU on 11/03/87 10:01:56 EST Received: by BOSTONU (Mailer X1.25) id 7627; Tue, 03 Nov 87 10:01:28 EST Date: 3 Nov 1987 10:01:27 From: "Boston University Postmaster" To: xios!MAILER-DAEMON@ubc-vision.uucp (Mail Delivery Subject: Undelivered Mail Comment: Comment: User CZHETH5A @ BOSTONU not found Comment: No Such User Found: The following mail has been returned to you because the recipient does not exist here at Boston University on the BOSTONU.BITNET node. Please re-check the address (userid) for correct mailing. For mailing lists - please remove this address from the list. Sorry for any inconvenience. - Boston University Postmaster for BITNET ----- Rejected Mail Follows ----- Received: from bu-cs.BU.EDU by buacca.bu.edu ; 2 Nov 87 23:16:59 EST Return-Path: To: CZHETH5A.BITNET!BIOMED@buacca.bu.edu ----- Transcript of session follows ----- 550 info-futures... User unknown: Not a typewriter ----- Unsent message follows ----- Received: by xios.UUCP (4.12/smail2.2/02-24-87) id AA04173; Mon, 2 Nov 87 09:26:40 est Received: from utgpu with uucp; Fri, 30 Oct 87 14:20:45 Received: from ai.toronto.edu by gpu.utcs.toronto.edu via ETHER with SMTP id AA Received: from ubc-vision by ai.toronto.edu via X.25 with UUCP id AA01840; Fri, From: Received: by ubc-vision.UUCP id AA28794; Fri, 30 Oct 87 10:20:16 pst Received: from BU-CS.BU.EDU by uunet.UU.NET (5.54/1.14) id AA03089; Fri, 30 Oct 87 07:15:58 EST Return-Path: Received: from BUACCA.BU.EDU by bu-cs.BU.EDU (3.2/4.7) id AA08591; Thu, 29 Oct 87 08:20:28 EST Message-Id: <8710291320.AA08591@bu-cs.BU.EDU> Received: from BOSTONU.BITNET by BUACCA.BU.EDU on 10/29/87 08:24:50 EST Received: from CZHETH5A.BITNET (BIOMED) by BOSTONU.BITNET (Mailer X1.25) with BSMTP id 6353; Thu, 29 Oct 87 08:24:47 EST Date: Thu, 29 Oct 87 11:01 GMT Subject: Warm superconductors To: info-futures@bu-cs.bu.edu X-Original-To: info-futures@bu-cs.bu.edu, BIOMED Everybody talks about these 'warm superconductors'. A Nobel prize was given to the inventors, and the magazines are full of phrases like 'changing the world...'. Room temperature superconductors are expected for the near future. HOW will they change the world ? Power distribution: Zero resistance allows ultra high currents at low voltages. Can power lines go underground, because insulation is not a problem anymore ? How about the magnetic field ? Forces on ferromagnetic objects ? Cardiac pacemakers ? Compasses ? What happens, if a line breaks ? sqr(I)*L must be very high -> huge sparks at the breakpoint ? Power storage: Can high energy coils be built ? What energy per volume/weigth is possible, compared to batteries or gasoline ? The support structure for these coils will be under heavy mechanical stress. Is this the limiting factor ? Or is the loss of superconductivity at high magnetic field strength ? What if a coils breaks ? Huge bang ? Poisonous emissions ? Computers: Is the impact on computers that big ? I thought, the limiting factors today are the propagation speed of signals, and the stray reactances of the elements. Switching speed of transistors won't change, neither will inductance and capacitance of connecting lines. Or will they ? Comments are invited. Tom ANNA Zuerich, Switzerland. BIOMED@CZHETH5A (Bitnet)