From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!mx02.eternal-september.org!feeder.eternal-september.org!usenet.blueworldhosting.com!feeder01.blueworldhosting.com!peer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!Xl.tags.giganews.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.earthlink.com!news.earthlink.com.POSTED!not-for-mail NNTP-Posting-Date: Fri, 22 Jan 2016 20:19:03 -0600 From: Dennis Lee Bieber Newsgroups: comp.lang.ada Subject: Re: IoT / IIoT stuff Date: Fri, 22 Jan 2016 21:19:33 -0500 Organization: IISS Elusive Unicorn Message-ID: <9oo5abl0fp9asoilo6p127iud9afm2gdk7@4ax.com> References: X-Newsreader: Forte Agent 6.00/32.1186 X-No-Archive: YES MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 108.73.117.17 X-Trace: sv3-uc3ENI40hcz01KvoGDqCAvYfaR4mq5BJ6Y4IkfoU7N1FbFPmoHSapijHv07O0Dvi5NTIA7aI2v2htHU!DRcdQ7v5HLv1uUO8YAiI0Ct6nM0HMrVskllhca1eSEREBcPZFvim7GEtdSiL7YW+6bZHCemuE1RW!0powGoYDTRNex757AM8uClYT0Kk= X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 X-Original-Bytes: 2017 X-Received-Bytes: 2129 X-Received-Body-CRC: 2428327376 Xref: news.eternal-september.org comp.lang.ada:29206 Date: 2016-01-22T21:19:33-05:00 List-Id: On Fri, 22 Jan 2016 18:59:28 +0000 (UTC), tmoran@acm.org declaimed the following: >> This is not how automation applications are designed and are required to >> be, as they know exactly where devices are and which sensors and >> actuators they have. > Lots of cheap sensors and actuators implies designing for unreliable, but >multiply redundant, sets of devices. eg "Homeowner detected leaving work >at usual time, then detected at end of driveway at expected time, but no >detection of house door being opened. What's the probability he's >actually home and the house door sensor failed, vs he went to the store >and the end-of-driveway detection was spurious, and what should we do?" ... vs he had a heart attack trudging through the snow from the driveway to the house door... -- Wulfraed Dennis Lee Bieber AF6VN wlfraed@ix.netcom.com HTTP://wlfraed.home.netcom.com/