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User: macs4all

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  1. Re:Does this guy even know anything about this? on New York City Pushes Plan To Prevent Cyberattacks On Elevators, Boilers · · Score: 1

    Boilers have release valves for a reason. Even if you could turn the heat all the way up the safety release valves would let go. You would have to weld those shut to explode a boiler. If the "evil-doers" are welding those shut you have other problems

    Exactly what I was thinking.

    Same thing with the elevators. Other than the dynamic braking that goes on, elevators pretty much operate at full-tilt anyway, and I am quite sure that there is a hard software/hardware limiter that sets an upper limit on the ascent/descent speed, as well as the maximum accel/decel rate.

    Any elevator engineers/techs care to weigh in on this?

  2. Re:Sounds Interesting ... on Microsoft Creates Kinect-Like System Using Laptop Speaker & Microphone · · Score: 0

    As it turns out, we know how to convert a time-domain function into a frequency-domain function. The possibilities are endless.

    Now turn on a room fan, introducing sub-sonic (but TRACK-ABLE) doppler shifts to EVERY sound in the room (including the 18-22 KHz "illumination" frequency), and get back with me regarding how good the doppler tracking is after that... Remember, this has to operate in pretty-much "real-time", so there isn't too much pattern-matching, auto-correlation, or other "history-requiring" tricks that can be used to try to separate "fan-warble" from "legitimate movement". Not to mention the fact that we aren't talking about "masking" the intended frequency with other noise; but rather introducing FREQUENCY changes that are basically indistinguishable from the FREQUENCY changes you are trying to detect.

    I agree that it isn't going to affect everyone; but a location system that can't deal with something that millions of users use (some sort of room-fan), AND that annoys the shit out of non-deaf teenagers and young adults (not to mention dogs, cats, rodents and other pets), isn't likely to be a successful product...

  3. Re:Slow learner? :) on Microsoft Creates Kinect-Like System Using Laptop Speaker & Microphone · · Score: 2

    Now, let's turn on a room fan, or have the HVAC system start blowing the air around...

    I'd like to quote TFS and GP here "The Microsoft Research team is reporting a 90-100% accuracy rate for SoundWave, even in noisy environments."

    Bzzzt! Physics knowledge failure detected!

    The type of "sound" that a typical room-fan generates that will screw with this isn't the audible "whoosh" sound, but rather the SUB-sonic "warble" (frequency wobble) "vibrato" that is generated by the speed of the fan blades "beating" the air. This "vibrato" might be tracked as "motion" by the doppler-tracking s/w. At best, it would introduce an annoying "uncertainty" in the position information, and at worst, might cause the system to just "give up" due to crappy position data.

    To generate the sound I'm talking about, walk up to a window or room-fan and "sing" into it. That "vibrato" is happening to EVERY sound in the room. We are just used to ignoring it. But, anyone who has done any musical practicing, or worse yet, audio recording, in a room with a fan knows EXACTLY what I'm talking about...

  4. Re:ultrasonic? on Microsoft Creates Kinect-Like System Using Laptop Speaker & Microphone · · Score: 1

    You forgot the 5 points for every cow-orker that runs to the bathroom and throws up, and 10 points for every instance of a senseless argument breaking out between those cow-orkers.

  5. Re:Ultrasonic? on Microsoft Creates Kinect-Like System Using Laptop Speaker & Microphone · · Score: 1

    Yeah, if it's 18 kHz, I'll most likely be able to hear it at least from my right ear. (One reason I'm very glad LCD has displaced CRT TV's is that damn flyback whine.)

    Then again, how much amplitude are you going to get out of a randomly chosen voice coil speaker at frequencies above 20kHz?

    Flyback whine is 15,750 Hz in the U.S. When I was a kid, I could clearly hear that from upstairs in my bedroom with the TV downstairs in the livingroom.

    Teenagers (at least those who haven't cooked their hearing yet) will want to VOMIT when they sit down in front of this. Mark my words: As soon as they start testing this in front of people younger than the Project Team, this will die the death it so richly deserves...

  6. Re:Ultrasonic? on Microsoft Creates Kinect-Like System Using Laptop Speaker & Microphone · · Score: 1

    It could also be the low pass (digital) filter inside your "soundcard" kicking in.

    Not that abruptly. More than likely, he has hit the minimum "period" (1/frequency) that the audio generator s/w is designed to create. Speakers don't just "drop off" at a 1 Hz boundary like that. Nor does any "brick-wall" LPF, either software or hardware. It's always dB per Octave (doubling/halving of frequency). And is never so high a number that 19200 Hz would pass right through and 19201 Hz would be completely gone.

    Boy, it's truly frightening how stupid most Slashdotters are sometimes...

  7. Re:Ultrasonic? on Microsoft Creates Kinect-Like System Using Laptop Speaker & Microphone · · Score: 1

    Not really, most humans almost can't hear past 18kHz, and even then you can only hear a very weak sound.

    Search for a online wave generator and try it by yourself, generate 16k, 17k, 18k, etc.

    True if you're a male above 25 years old, or a female above about 45 or 50. But when I worked on a project designing a PWM motor control with a "chopping" frequency of 18 KHz, the younger technicians that would wander into the R&D department would bitch and moan about the control "singing". And that was just from piezoelectric effect of the output FETs. But here, we're talking about INTENTIONALLY sending out not-quite-ultrasonic tones.

    BTW, most laptops' speakers probably barely go up to 18 KHz. Which means that this "tone" is going to have to be pretty damned loud. Guess what happens to the energy imparted to a speaker when it can't respond to the frequency?

    That's right. It's converted to HEAT.

    So, have a good time baking your ears (and setting your dog and cat's teeth on edge) all day with this. Just rest assured that you are also overheating your laptop speakers while you're doing it...

  8. Re:Sounds Interesting ... on Microsoft Creates Kinect-Like System Using Laptop Speaker & Microphone · · Score: 0

    to clarify:

    it's looking for specific frequencies, so other noise is not going to distort it much unless that noise is also at the same frequencies.

    You don't understand much about the physics of sound, do you?

  9. Re:Sounds Interesting ... on Microsoft Creates Kinect-Like System Using Laptop Speaker & Microphone · · Score: 0

    From the article "The Microsoft Research team is reporting a 90-100% accuracy rate for SoundWave, even in noisy environments."

    Now, let's turn on a room fan, or have the HVAC system start blowing the air around...

    Plus, as I said earlier, 18-22 KHz is definitely audible for the vast majority of the young gamers they are targeting, so I declare this an EPIC fail...

  10. Re:Sounds Interesting ... on Microsoft Creates Kinect-Like System Using Laptop Speaker & Microphone · · Score: 3, Insightful

    It sounds interesting, as long as there is no background noise, you are alone in the room with the system and the system itself isn't generating any noises (fans? DVD access? music or sound effects?).

    And you don't have a fan operating in the room, and aren't less than 25 years old (or 40 if female) (most males can hear 18-22 KHz up to about that age, and females until about age 40-50), so that you can't stand to be in the same room with it.

  11. Re:We have QA processes which automatically detect on Apple Security Blunder Exposes Lion Login Passwords In Clear Text · · Score: 1

    things such as debug logs during testing.

    Does Apple have no such thing? This leads me to think that Apple either has no development lifecycle or, in case they have one, only half-heartedly obey it.

    I think that a company that has been able to pull off a virtually seamless architecture and word-size change like Apple did with OS X probably has their development methodology pretty well, er, developed, don'tcha think?

  12. Re:GPL is poison to business on Why Desktop Linux Hasn't Taken Off · · Score: 0

    But as far as successful OSes with different GUIs DOS had: Windows16, Many Dos shells particularly popular was WordPerfect's.

    And JavaOS (dumb phones) which is possibly one of the most successful OSes of all time has more GUIs than I can even list.

    You're down to counting DOS Shells and Java PHONE OSes as GUIs?!? Hahahahahahaha!!!!

    By the way, you forgot the (most-excellent) GS/OS and Quark Catalyst and MouseDesk and also GEOS for the Apple //.

    But you know that's not what we were talking about...

  13. Re:Yep, it's all about the apps on Why Desktop Linux Hasn't Taken Off · · Score: 2

    Not with Pro/E and Solidworks. Not saying anything about Linux, but if you think AutoCAD dominates the CAD field, then you don't know mch[sic] about CAD.

    I'm no Windows fan, but how does that bolster an argument that Linux has viable alternatives to Pro/E and Solidworks?

  14. Re:GPL is poison to business on Why Desktop Linux Hasn't Taken Off · · Score: 1

    There is a GUI. It is called X. And KDE is the standard desktop. GNOME needs to fold into it. But even 2 main choices isn't huge.

    Yes, it is.

    No OS, ever, has successfully supported two simultaneous GUI environments. X be damned. That's not what the user sees.

  15. Re:More Mac inquiries? I am shocked. on Why Desktop Linux Hasn't Taken Off · · Score: 0

    You mean the operating system with multiple millions of dollars of advertising and marketing behind it has a greater mindshare among the general public than the one put together by volunteers with no such backing? Colour me shocked.

    Actually, it shows an amazing shift in the computer-buying public, especially in America. Finally, people are beginning to realize the difference between price and value. And that's why Macs (and Apple in general) are selling like the proverbial hotcakes.

    It was fine (and even a little fun) in the late 70s and early 80s to tinker around with your computer, share the latest tips and tricks at your local computer club. It was a voyage of discovery, and pretty much everyone was in the same boat.

    But thirty years later, the vast majority of people want their computer to work like their microwave oven, and they are, in increasing numbers, willing to spend what amounts to pretty much zero dollars difference over the life of the product, to achieve that level of "just works".

    Linux has had at least a third more time than OS X has to get its shit together; but it not only can't, as shown by the statement:

    "But to suggest like the top poster here that Linux "consolidate" its distributions into one shows a serious misunderstanding of what Linux is and how it's put together.)"

    the Linux community (whatever that is(!!!), actually doesn't want to get its shit together!

    So there it is in a nutshell: Linux is doomed, and proud of it!

  16. Re:Infected? on One In Five Macs Holds Malware — For Windows · · Score: 0

    Who cares? The important part is: Let Macs onto your mostly Windows network and you might get a not so fun surprise...

    Assuming, of course, that you haven't taken the precautions that ALL Windows installations MUST have to survive for more than 10 seconds in the wild.

  17. Re:Infected? on One In Five Macs Holds Malware — For Windows · · Score: 0

    who did you piss off JD? 2 posts so far, marked down 2x flamebait ive had to mod up for not being flamebait, when did /. become digg?

    From my own Punish-Mod Apple-Hating Karma roller-coaster experience, I'd say about 3 years ago.

  18. Re:Infected? on One In Five Macs Holds Malware — For Windows · · Score: 0

    True - if it's inert, it's not really an infection. However, this is why you see Linux workstations running anti-virus software in an enterprise environment. It's not because your Linux system will get "infected"; it's so your Linux system won't inadvertently infect vulnerable systems.

    Enterprise, or public-facing "server" applications are different. If I ran a public-facing webserver on any of my Macs, I might be inclined to run A/V software on that machine.

  19. Re:Infected? on One In Five Macs Holds Malware — For Windows · · Score: 0

    Why? So they don't fuck other people over with malware. It is not infecting your machine, true, you may also not like windows very much, but why would you not care that your machine could potentially screw a lot of other people over. If you received the smallpox vaccine, but happened to have a jar of smallpox on the shelf at home, would you just not worry about it because you are immune, even if millions of other people would become horribly ill or die if you released it because they run a different immune system? Should people that are seemingly immune to HIV, but still carry and spread the virus have unsafe sex with others and not care that they might be infecting them with a fatal virus? Yeah, I know its just windows malware we're talking about, but why would you knowingly turn a blind eye to malware? Stamp it out wherever you see it and make it less rewarding for malware writers. We won't get rid of it that easily, but we may just lower the prevalence of it. Remember, those infected windows machines just might be used to DDoS a system that you need and rely on.

    Do you really think that most Windows users would waste their CPU cycles scanning for Mac malware if the situations were reversed?

  20. Re:Infected? on One In Five Macs Holds Malware — For Windows · · Score: 0

    Look up flashback?

    All you had to do was view a site in Safari and even under a regular user account you were 0wned even if you did not click the "upgrade flash now" button. Of course damage was more limited and could be easily removed by deleting and recreating the user account taht way versus running as admin, but still.

    Even with the latest patch more mac users are getting infected by the day. The latest varient now runs silently without any interaction from the user at all.

    Memory corruption bugs are evil. They can even bypass user security totally and simply run around the check.

    Except Apple fixed the Java vulnerability that made Flashback possible, and even went so far as to automatically disable Java if it is idle for more than 35 days. And yet, Flashback still had no way of automatically transferring directly to another machine peer-to-peer, making the rate-of-infection relatively slow.

  21. Re:Infected? on One In Five Macs Holds Malware — For Windows · · Score: 0

    Correct but it does indicate mac peeps aren't particularly careful about what they download or what sites they visit.

    I wouldn't blame the users. Safari will auto-download any file specified by a website without a prompt. Therefore a malicious site can drop a bunch of EXE files (or Mac trojans) into a Mac's download folder. The user has no way of preventing this - they have to clean it up afterwards.

    Download is not Execute.

    That cannot be done without encountering a Warning and a Confirmation.

    But, as we all know, there's no defense against "stupid".

  22. Re:Don't you have to enter your password? on Federal Court Allows Class-Action Suit Against Apple Over In-App Purchases · · Score: 0

    The only mention I found from prior to 4.2 that mentions the feature was originally published around the time of 4.0, but it had clearly been edited to include 4.2, 4.3 and 5.0 info, making the original publication date worthless. I've been with iOS since 2.0, and I'm fairly certain 3.1 didn't bring in-app purchase disabling as a feature

    Howabout this iOS 3.1 User Manual PDF.

    See Chapter 19, page 146.

    Quote:

    "Restrict purchases within applications: Turn In-App Purchases off. When enabled, this feature allows you to purchase additional content or features within applications downloaded from the App Store."

    Then skip to the last page of the PDF (technically page 217, I think) and see the Copyright 2009.

    So, I guess that makes me two for, uh, two... ;-)

  23. Re:Don't you have to enter your password? on Federal Court Allows Class-Action Suit Against Apple Over In-App Purchases · · Score: 1

    iOS 3.0 introduced In-App Purchases. These still required a Password, but there might have been no other "Restriction".

    iOS 3.1 introduced In-App Purchase Restrictions. (See pg. 146 of the user manual PDF).

    Nice, was trying to hunt down at what point In-App purchase blocking came in!

    And yet, I was MODDED DOWN for my trouble...

  24. Re:Don't you have to enter your password? on Federal Court Allows Class-Action Suit Against Apple Over In-App Purchases · · Score: 1

    Do we believe Wikipedia, or Apple about when features were added? I say "Apple". To quote THIS Apple KnowledgeBase article:

    "With iOS 3.0 or later, you can purchase subscriptions and extra content from within an application using your iPhone, iPad, or iPod touch. Some examples of In-App Purchases are bonus game levels/maps, additional experience points, subscriptions, and recurring services."

    Caveat: I did not have any iOS devices personally until November, 2011 (iPhone 4S); so, the KnowledgeBase article could be incorrect; but I see other sources that agree.

    I DO agree that there was no way to DISABLE In-App-Purchases until iOS 3.1; but we're talking about a time period between iOS 3.0, which released on June 17, 2009, and iOS 3.1, which released on September 9, 2009. Not until iOS 4.3.

    Having said that, I do think that the iOS PW timeout was way too long, and further, IMHO, I think that cycling through "standby" (by pressing the "sleep/wake" pushbutton switch twice) ought to then require at least ONE password from ANYTHING that would be requiring same, AFTER you (re)wake the device. That way, a Parent could learn the simple muscle-memory act of cycling "sleep" before they hand their iOS device (this would be a good fix for Android, too) to their kid, especially after doing something that required "Privilege Escalation"/"Payment Authorization", etc., and the problem of "inadvertent privilege escalation" would be instantly a thing of the past.

    Yes, I KNOW someone has to know about the switch, etc; but at some point you just have to quote Comedian Ron White and say "You can't fix stupid."...

  25. Re:Don't you have to enter your password? on Federal Court Allows Class-Action Suit Against Apple Over In-App Purchases · · Score: 1

    The parent is just LAZY and LITIGIOUS. Kinda par for the course these days, unfortunately...

    You are the worst fucking kind of hypocrite.

    When it's convenient, it's a *good* thing that Apple users are clueless and don't need to know jack shit about using their devices. It's good because "it just works."

    Well, now here's a case of it "just working" and suddenly these particular Apple users are fucking lazy, shitty parents because they couldn't be bothered to learn every detail of their device that was sold to them as something that "just works."

    Fuck you.

    And yet, if this story were about Android, no doubt you'd be saying something like "The Parent was presented with the list of Permissions when they installed the game, so it's their own fault." If I'm a hypocrite, what does that make you? A Liar and a Hypocrite, that's what.

    And, oh yes, an Anonymous Coward. Let's not forget that little detail...