waashk/20ng huggingface dataset:
In article <nagleC6213E.DsE@netcom.com>, nagle@netcom.com (John Nagle) writes: > lihan@ccwf.cc.utexas.edu (Bruce G. Bostwick) writes: >>Well, yes and no.  The _image_ can't be on the screen less than 1/30 >>of a second, but a _mixture_ of images that's about 90% of the field >>that was supposed to be there and 10% of the 'subliminal' addition >>could be overlaid for one field, producing the same overall effect to >>our sluggish retinae of a discrete image projected for 1/300 second. >     >       This is a 1950s idea.  Supposedly, splicing in a frame of "Buy > popcorn" upped popcorn sales in a movie theatre.  Big flap at the time. > Congress involved.  Talk of making it illegal.  General agreement by > networks not to do it.  More than Talk:  From the FCC Rules:  73.4250 Subliminal Perception:  (a) See Public Notice, FCC 74-78, dated January 24, 1974, 44 FCC 2d, 1016; 39 Fr 3714, January 29, 1974. (b) See FCC Information Bulletin, "Subliminal Projection" (sic, at least in my rules service copy of the rules), dated November 1977.  Since I don't have either old copies of the Federal Register or the Information Bulletin around, I can't tell you what you can't do on TV ( or radio) but I seem to remember this being an unnecisarily hot subject in the late '70s.   Practically speaking, I dont have too much trouble seeing the one frame edits in MTV promos,  badly scratched or torn single frames in films and such, but maby that's just because the contrast between the single frame and the surrounding material was significant.  I never believed in the one-frame type of SP being real.    On the other hand, the Coca-Cola or Brand (insert desired name here) beer cans conveniently placed so the brand name is visible in the movie you just watched, that's another story, and if your TV station or network was paid by the beer company for the privilege of doing that, there has to be a "Promotional Consideration paid by ...) or similar message included with the program; but if the TV station bought the movie already edited that way from the film company and didn't get any of the payment for "brand visibility" that the film company got, then they don't have to run the message. >  >       A few years ago, some junior person at an advertising agency > re-invented subliminal projection and one commercial went out on tape > with single-frame messages.  It aired on a few stations, but a tech > at one station, previewing the tape, noticed a flicker and looked at > the tape frame-by-frame to find the "defect".  Big flap.  FCC notified. > Commercial pulled.  Press reports. Embarassed ad agency.  You could > probably find the press reports via Dialog or Nexis if you wanted. >  >       Now that everybody has VCRs, it's not likely that anybody could > get away with this on TV. >  > 					John Nagle
Could someone please tell me if a 1/4 decoder is the same as a 1 to 4 demultiplexer. I know how to link 2 of these to get an 8 output circuit, but how do I link 5 of these to make a 1/16 multiplexer. Sorry if this seems like a lame question, but I'm only a newbie to electronics, and I have to do this circuit. Please make any mail as droolproof as possible.
Does anyone here know where I can find a modem and comm. software for an Apple IIe?  I would prefer in Manhattan, but New Jersey would work too.  David Tillyer, DATCC@CUNYVM.CUNY.EDU
In article <wb9omc.735430855@dynamo.ecn.purdue.edu> wb9omc@dynamo.ecn.purdue.edu (Duane P Mantick) writes: >Duane >	Yeesh, you WILL be nailing those IRLEDs.  May I suggest getting your >mitts on the Siemens SFH484-2 IRLED?  This unit is designed to take some big >current pulses if you can get your duty cycle down a bit.  It will output >nearly a watt (975 mW) with REAL short duty cycle times. > >(nice thing about the SFH484-2 is that it is CHEAP.  I got mine for about >50 cents a piece, even though I had to buy 100 of them....)  Are you saying that you have some extras that you would like to do some cost recovery on?  I may be interested.  I think for practical and cost reasons I am limited to envelope detection so that leaves me with only increasing the output power and increasing the optical gain at the receiver as methods to extend range.  >	BTW, I have seen IRLEDs with outputs up to 6 watts...honest, >6 WATTS.  I don't have the book here at work so I can't recall the company >name.  The 6 watter ain't cheap, around $108 but if you want some power, >mamamia, that's pretty hot.  They also have a 4 watt, a 2 watt and a >1 watt device in their line, and will sell small quan. to individuals. >If you are interested, I can find the book at home and get the >pertinent info.  Yes I'm interested in the company name.  I have access to an extensive data book collection.  With that kind of power, are we getting into an area where eye safety is getting to be a problem.  >	Now, as for the position detector, you might try ELTEC in Florida. >Phone number listed in the 92/93 ETID is 904-253-5328.  They seem like >nice people.  Their specialty is passive infrared detection devices, >so they might be able to help you out.  They are a long way from me but they might be a better source than I can find around here.  >	I'm curious about your applications if you don't mind saying. >The device sounds like it could be useful in a lasertag game, although you'd >need to up your carrier signal concept to 58.8 KHz......  I'm keeping my application confidential for now.  Raising the frequency should be no problem, in fact one respondent to my question said that I may not have to mimic the 50% duty cycle normally used by IR detector chips.  --
In article <1993Apr15.103953.66252@cc.usu.edu>  writes: > In article <C5Hs5J.AG7@bcstec.ca.boeing.com>, rgc3679@bcstec.ca.boeing.com   (Robert G. Carpenter) writes: >  > |> It seems reasonable to me that a microwave transmitter-receiver setup   could  > |> do the job. For example, say you want to map an acre lot, it'd be   convenient > |> to place MW transmitters around the lot's periphery (either 2 or 3) and   then > |> carry a hand-held recorder and walk to a point on the lot, press a button   and > |> the coords of the recorder's location is stored as digital data. > |>  > |> What's the chance of this working? Any systems like this already exist? > |> What kind of accuracy could you expect? What would something like this > |> cost to prototype? Is there a better alternative than microwaves? >  > Of course you could develope this system, but there is already a system   called Global > Positioning Satellites.  It gives three dimensional coordinates anywhere on   earth.  > Many surveyors use this system with a differential receiver/transmitter to   get > coordinates within centimeters.  Basic receivers with resolution of a few   meters (on > a good day) are available from many sources. >  >  > --  > WMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMWMW >  >   \_      \_  \_\_\_    \_\_\_               Weston R Beal >    \_      \_  \_    \_  \_    \_         sldf3@sol.ee.usu.edu >     \_  \_  \_  \_\_\_    \_\_\_            sldf3@cc.usu.edu >      \_\_  \_\_  \_  \_    \_    \_       Electrical Engineer >       \_      \_  \_    \_  \_\_\_       Utah State University >  >   "That's the wonderful thing about crayons; they can take you to >    more places than a starship can."    - Guinon >  >   Thought it means Global Positioning System. There are two precision levels, one   for army applications (killing has to be very accurate today) and one for civil   ones. The civil precision is about 20 to 30m (correct me, if I'm wrong),   though, it may be insufficiant for mapping buildings. But there is a way with   an additional reference point (e.g. one fixed GPS system in a house) to get the   same high precision as the military version, but it gets pretty complicated   then. If You use a microwave system (actually this means some type of radar),   You need quite a lot of number crunching to get accurate vectorized data out of   Your original signals. So the GPS system seems to be the better (and running)   idea for Your application(there have been discussions in this newsgroup, don't   know of an address anymore).  Cheers    Robert   (HB9NBY)
schuch@phx.mcd.mot.com (John Schuch) writes:  >I have always thought that if I wanted to send the Police a tape with >a ransom demand on it, or send CNN a video tape to see if they wanted >to buy it, I would place a small magnet near the take-up spool so the >tape would be erased as it was played. Who would think to check?   That is an exceptionally cool idea. Would it work?  How strong a field is needed? Anyone?
In article <1qppr5INNaqa@dns1.NMSU.Edu> mcole@spock (COLE) writes: >I would like to experiment with the INTEL 8051 family.  Does anyone out   >there know of any good FTP sites that might have compiliers, assemblers,   >etc.?  Well, it's not an FTP site, but I got an 800 number for Signetics BBS.  The Signetics BBS contain some pretty good items for the 8051.  I am currently using the following files which I downloaded from them:      ml-asm51.zip      MetaLink's 8051 family macro assembler     bootstrp.zip      Hex file Load-and-Go using 8051 uart                       (allows you to download your program into a RAM                        and then execute from RAM.  Works great.  Tell                        me if you want more details).     tutor51.zip       TSR for 8051 feature help screens      They have lots of coding examples, assemblers, and misc. tools.  Signetics BBS numbers are:    (800) 451-6644                               (408) 991-2406  Have fun, --  Mont Pierce
Intel also makes some neat memory and peripheral chips:  Old technology (early 1980's)   8155  ram plus IO (slow ram as I recall) 8755  eprom plus IO (expensive and slow)   Intel does make Eproms with built in address latches. I fear that you would need a very flexible and up-to-date eprom programmer to write to them.  give them a call.  I am not able to locate their memory products book yet.    Sigh...  Now, who borrowed it...
In article <sehari.735357542@du139-213.cc.iastate.edu> sehari@iastate.edu (Babak Sehari) writes: > >I have written a program and I want to market it.  I would like certain degree >of protection, since my main custmers are individuals and not the  >cooperations.   I know laser hole burning method, and hardware key method, >however, my  software is going to cost only $15.00, so I can not afford that. >Also, at this low price I can not afford people make too many copy of my >software. Well, I guess say upto %20 illigal copying is ok by me. > >However, I do not want someone to get a copy of PCTools and copy my software.   >Off course, I never meant to forbid the true hackers from copying, since they >can develope a better program anyway.  I wouldn't bother with the copy protection, if I were you.  If you program is any good, the pirates will have stripped the protection and will be distributing the stripped version is well under a week.  Hardware methods prevent J. Random Loser from using his Copy II PC to pirate  your software, but doesn't stop anyone who knows a few people with enough  connections to "real" pirates who _will_ be able to defeat your "check for the  hole" code.  You may want to price your software (depending on what it is) a tad higher... a price change from $15 to $25 probably would turn off very few potentials buyers, and that way you could tolerate more pirates (whose numbers don't change with the price).  As for the 20% pirating figure... ha, ha.  Of course, a lot of pirates just have this "thing" about having pirated software, even if they never use it, so perhaps that really wouldn't count towards 20%.  Even so, 20% is awfully low.   					---Joel Kolstad
{Gladman Aviv} said    "Re: Blue LED's"       to <All> on 04-24-93  01:51   GA> In order to emit blue light, a semiconductor must have a band gap  GA> energy within the region of 2.6 to 2.8 electron Volts. According to my  GA> physical electronics prof, you can't get an LED with that band gap.  GA> That's why you don't find blue LEDs or, for that matter, some other  GA> colour of LEDs. That is not to say that blue LEDs can't be found.  I've  GA> seen 'blue' LEDs sold, but they were just your typical visible light  GA> LED in a blue plastic covering. They didn't emit very much light...      This is not true they have and do make blue LED's they are     about 2.80 in digikey. 470nm wavelength by the way                  Stephen Cyberman@Toz.Buffalo.NY.US              Mangled on Sun  04-25-1993  at 13:33:46
Does any one know where I can get a telecaption decoder module?  Need it to build a close caption decoder. Thanks.  Wayne
In article <C513wI.G5A@athena.cs.uga.edu>, mcovingt@aisun3.ai.uga.edu (Michael Covington) writes: |> (1) Don't use big capacitors.  They are unreliable for timing due to |> leakage.  |>  |> Instead, use a quartz crystal and divide its frequency by 2 40 times |> or something like that. |>  |> 1 MHz divided by 2^40 = 1 cycle per 2 weeks, approximately. |>  |> (2) I wouldn't expect any components (other than batteries or electrolytic |> capacitors) to fail at -40 C (or -40 F for that matter either :) ). |> The battery is going to be your big problem.  Also, of course, your |> circuit shouldn't depend on exact values of resistors (which a crystal- |> controlled timer won't). |>   ... Wouldn't a crystal be affected by cold? My gut feeling is that, as a mechanically resonating device, extreme cold is likely to affect the compliance (?terminology?) of the quartz, and hence its resonant frequency.  |> --  |> :-  Michael A. Covington         internet mcovingt@ai.uga.edu :    ***** |> :-  Artificial Intelligence Programs       phone 706 542-0358 :  ********* |> :-  The University of Georgia                fax 706 542-0349 :   *  *  * |> :-  Athens, Georgia 30602-7415 U.S.A.     amateur radio N4TMI :  ** *** **   JohnH  ----------------------------------------------------------------------------        |  _  |_   _   |_|  _   _|  _|              Electronics Department     |_| (_) | | | |  | | (_| (_| (_| \/           School of MPCE     ---------------------------------/-           Macquarie University                                                   Sydney, AUSTRALIA 2109      Email: johnh@mpce.mq.edu.au, Ph: +61 2 805 8959, Fax: +61 2 805 8983
In article <1993Apr27.211036.1@ulkyvx.louisville.edu> jhwhit01@ulkyvx.louisville.edu writes: >In article <1993Apr26.221422.17208@mprgate.mpr.ca>, vanderby@mprgate.mpr.ca (David Vanderbyl) writes: > <lots of stuff deleted>  >The lead-acid secondary cell discharge reaction is EXOTHERMIC.  I am glad >you do not dispute this point.  If you don't want the lead storage battery >to discharge, it should be stored such that its charged state is the >equilibrium state.  During winter, the ground, be it covered with >concrete, dirt, or wood, maintains a cooler temperature on average than >the surrounding air or the battery.  The heat capacity of air is less than >that of concrete, dirt, or wood, so it heats faster.  Conversely, air cools >faster, too. > >The normal storage procedure for a battery is to leave it in an unheated >garage or basement.  The storage surface is often cooler than the >surrounding air, with the battery temperature somewhere in-between.  E.g., >the basement air temperature may be 70 F, the floor temperature 65 F, and >the battery temperature 66 F. > >The air temperature is HIGHER than the battery temperature.  The heat of >reaction is not going to move up the gradient.  The floor temperature is >LOWER than the battery temperature, and heat is going to move to it.  The >floor is an incredible heat sink. >  Might depend on where you live .. I know locally, for most of the winter the ground, and concrete floor, within sheds and garages (unheated) is signifacantly warmer than the average air temperature.  The air does get warmer during the day, but during the night, the ground and concrete is definitely warmer, especially when protected by the walls from the albedo effect.  And the nights are longer by several hours than the days.  <rest of quoted text deleted> > >Jeff White       jhwhit01@ulkyvx.louisville.edu
In a previous article, ree88132@zach.fit.edu (Keith Ledig) writes: >I am looking for a text/reference that will include pinouts,  >description, and functionality for just about any IC made. >Does such a text exist?  Are there docs on the Internet that >reference IC's?  It would be a great idea if each major >IC manufacturer made available to the public an anonymous >FTP site with all it's data books in the form of text files. >(ala RFC style).  This would save time and money for the >IC manufacturer since a text file costs nothing to send >around the world via internet and since most users of >IC's are found in the internet anyway.   > >Are there any books available for purchase that reference >(as many as possible)?  Or am I going to be stuck obtaining >a zillion databooks from the manufacturers (those little >phonebook-type books that are obsoleted every couple years)  We use a CD-ROM based system here.  There are about 45 CD-ROM disks and a 4-disk changer hooked to a dedicated MS-DOS computer.  It contains scanned images of data book pages for several thousand parts.  When you ask it for something it knows about (mostly active IC parts), it works quite well. THey don't handle all the varieties of transistors or diodes that exist. It is definately a start in the right direction, but they need to expand the data base to handle more types of stuff.  These systems aren't cheap.  We paid about $7,000 for the liscence and get monthly updates of some of the CD-ROM disks.  We send the old ones back to them so that they will keep sending us the updates.  I think we pay a yearly maintainence fee of about $1,500 to get the updates.  If you find the part you want, you can look at the data sheet on a page-sized monitor (it's a special monitor from SigmaSystems).  You can also print each page of the datasheet you want on a LaserJet printer.  Page printing takes a couple of minutes per page.  It can take a while to dump the 5 or 6 pages you usually need.  I have a feeling the maker wouldn't like it if we made the data available to all Internet users.    :-)    -dave
In article <1993Apr19.231050.2196@Rapnet.Sanders.Lockheed.Com> babb@rapnet.sanders.lockheed.com (Scott Babb) writes: >Brian Day (bday@lambda.msfc.nasa.gov) wrote: >: On December 29, 1992, it was illegal to operate a radar detector >: in the state of Virginia.  If one got caught, one got fined $65.00.  >The Federal Communications Act of 1934 made it *legal* for you to >operate a radio receiver of any kind, on any frequency (including >X, K, and Ka bands) in the United States.   	And the Commonwealth of Virginia has not exactly butted against the issue on those grounds.  The claim is that AS A MATTER OF TRAFFIC SAFETY one is not allowed to have a functioning radar detector on the dashboard while operating a motor vehicle.  	Yes, the argument is bogus, BUT... it hasn't been successfully challenged in court.  Yet.
|>   What the world needs is a meter that won't let you change ranges or |> turn it on/off with a lead stuck in the amps jack - a little bit of |> clever plastic detailing would take care of this and make the world |> safer for electricans, anyway. |>    Not that I've ever put a meter on the wrong range into a live  |> circuit, no, not me...not more than a dozen times, anyway.... |>     Bill |>  |>  |> bills@inqmind.bison.mb.ca |> The Inquiring Mind BBS, Winnipeg, Manitoba  204 488-1607  The Fluke 87 beeps at you if you try to take it out of a current measuring range while there is still a lead plugged in to the current sense socket.  ... this should solve your problem - unless you are in a noisy environment.  JohnH  ----------------------------------------------------------------------------        |  _  |_   _   |_|  _   _|  _|              Electronics Department     |_| (_) | | | |  | | (_| (_| (_| \/           School of MPCE     ---------------------------------/-           Macquarie University                                                   Sydney, AUSTRALIA 2109      Email: johnh@mpce.mq.edu.au, Ph: +61 2 805 8959, Fax: +61 2 805 8983
In article <WD.93Apr26122020@sam.cs.tu-berlin.de> wd@cs.tu-berlin.de (Wolfgang Diestelkamp) writes:     In article <1rg36hINNsr6@darkstar.UCSC.EDU> hugo@cats.ucsc.edu (Hugo Calendar) writes:     > I'm wondering if I can tote my American touch tone phone around with me    > to Sweden and Germany.  It's DC powered, and I can buy a special adapter    > for that in Europe.  The question is if the general electronics work    > the same.  I can buy a different wall plug and refit it (I'm sure I'd    > have to), but would that do the trick?     Two things to watch for:    In Germany (and I think the same holds for Sweden) only some    of the connections can handle tone dialing, so make sure the    phone can be set to pulse dialing.    In Sweden, the '0' is the first digit and all other digits    are pushed "down" by one position; this makes dialing (and    in the process converting numbers) an interesting task.    Otherwise, it is technically no problem to connect a foreign    phone to either the German or Swedish phone system.    OTOH neither you nor I would ever try that, as it is of course    illegal.  As the phone uses DTMF dialing, which by some magic all telecom operators seems to have agreed on, this is a complete non-issue.  I don't think there are any switches in Sweden that can't handle DTMF dialing. Most switches are now digital and thoses that aren't have been retrofitted with "magic fingers" that converts from DTMF to pulse dialing.  Thomas
swalker@uts.EDU.AU (-s87271077-s.walker-man-50-) writes:  >I was wondering about those massive concrete cylinders that >are ever present at nuclear poer sites. They look like cylinders >that have been pinched in the middle. Does anybody know what the >actual purpose of those things are?. I hear that they're called >'Cooling Towers' but what the heck do they cool? >I hope someone can help    The actual hourglass is hollow and is designed to generate a draft, exploiting the venturi effect.  Around the base of the hourglass is a ring of water towers.  Warm river water, coming from the steam condenser in the plant, is sprayed over louvres.  The draft being pulled through the tower cools the water by both evaporation and convection.  The sensible heat extracted from the cooling water is the driving force for draft generation.  It should be noted that the hourglass-shaped cooling towers are used on both fossile and nuclear plants.  It should also be noted that at  locations where water is plentiful, the cooling towers are only used part time, when the discharge temperature would exceed some release limit. It was once thought that the warm discharge water was damaging to fish. Fishermen know that is thoroughly incorrect.  Nontheless, stringent, usually state, regulations remain in some instances.  Since it typically takes 60,000 hp worth of pumping to move the volume of water needed  to cool a 1000 MWe plant, the cost of using the towers is not insignificant.
I had a similar idea, for a fax/answering machine switch, to put both machines on one line.  You order distinctive ringing from your phone company.  This is $3/month here. You get a second (unpublished) phone number.  When someone calls this number, your phone rings with short rings instead of long rings.  You set up your answering machine on 4 rings and your fax on six rings.  You'd give out the new # as your fax #. A device would measure the length of rings.  When it detects a short ring, it turns off your answering machine. Five rings later your fax picks up the call.  This should be cheaper and more elegant than the $80 switches now available.  But that's not what I did.  I'm giving out the new # to my friends and customers.  This should leave the old # for telemarketers, etc.  I won't pick up the phone when I hear the long rings.