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Comment: It's not the keyboard; it's the wrist rest (Score 1) 451

by CityZen (#49276435) Attached to: Ask Slashdot: Good Keyboard?

What makes the difference in comfort and ergonomics is not so much the keyboard itself, but how you've got it set up, and particularly the wrist rest you use.

I'd recommend getting a "wrist rest platform" (a wrist rest with a platform that extends under the keyboard itself). The benefit over one without a platform is that it's less likely to get pushed away from the keyboard.

You should avoid resting the bottoms of your wrists on a hard surface for long periods of time (especially while typing).

Comment: Seems like jamming would be easier (Score 1) 151

by CityZen (#48845499) Attached to: Being Pestered By Drones? Buy a Drone-Hunting Drone

Most drones operate using either 2.4 or 5.8Ghz frequencies for control. Seems like downing a drone just requires a RF jammer with a directional antenna. I suppose that the targeted drone can still get up again once you stop jamming it, so that's a difference compared to the fighting drone.

I also suppose this wouldn't block drones that were set to operate autonomously.

Comment: OT: Never shop at Lenscrafters or other big chains (Score 1) 464

by CityZen (#48719395) Attached to: Ask Slashdot: Are Progressive Glasses a Mistake For Computer Users?

While we're discussing glasses, let me rant:

*** Never shop at Lenscrafters or other big chain shops ***

The reason is that they all have the same parent company (Luxottica), and this monopoly will gladly charge you over $300 for the simplest lenses.

There's hardly ever a reason to pay more than $300 for a pair of glasses. When Lenscrafters was telling me I should pay over $500 for a set of glasses, I went to an independent optician and found a great set of glasses for $120.

Sure, I should break this down into the frame cost vs. the lens cost. For frames, pay whatever you want. You can find basic frames for $20 or designer frames for $200 or more.

Lenses can start at around $30 (a pair) or so and go up from there, depending upon the options. With the lightest materials and all the fancy coatings (including light-sensitive shading), you can go up to perhaps $200 or so.

Don't give your money (or even your insurance company's money) to the monopolist.

Comment: Understand the features. (Score 1) 116

by CityZen (#48480117) Attached to: Ask Slashdot: Best Drone For $100-$150?

It's good to know why some drones are more expensive than others. (I'm going to use "drone" instead of "quadcopter" or "multicopter" since it's easier to type.)

Your basic drone will have a 3D gyro & accelerometer that will keep it flying upright. That's about it. As far as the altitude, it's up to you to constantly vary the throttle setting to keep it somewhere near the height you want. It will also drift in the wind, and you'll have to vary the directional controls to counter this. It may also rotate when pushed by the wind.

A magnetic compass can help the drone keep a constant heading. This is important, since most drones are piloted relative to the direction they are heading. (Fancier ones have additional piloting options whereby you don't need to know which way they are pointed.)

Fancier drones (like Parrot AR) have additional sensors to maintain altitude. Either a pressure sensor (barometer) and/or ultrasonic sensors aimed at the ground will allow it to accomplish this. However, the drone will still drift in the wind.

The next level up adds either GPS or an optical flow sensor (low-resolution camera pointed straight down). With one or both of these, a drone can maintain its absolute position, give or take a couple feet.

Then, of course, there's the camera. The most basic thing is a camera that records to an onboard SD card. Then there are cameras that transmit NTSC/PAL video signals over the air to a receiver (which might be combined with a screen into the controller). Or there are cameras that transmit video via wifi to your mobile device. The latter tend to have more latency (delay), making it harder to pilot (when you're flying fast).

You'll want the camera to have a relatively wide FOV (field of view). Otherwise, it's hard to know what's around the craft that you might run into.

Then there are gimbals. These keep the video stabilised. Of course, now we're in the several hundred dollar range, so perhaps that's where to stop.

Comment: Re:Repairability/Upgradability/Modularity (Score 1) 471

by CityZen (#47875341) Attached to: Ask Slashdot: What Smartwatch Apps Could You See Yourself Using?

Tech can "last forever". Take my digital wristwatch, for instance. All it needs to keep going is a new battery every so many years. Fortunately, it's battery is replaceable. However, I agree with your point that many tech makers get this wrong. Non-replaceable batteries and closed, locked-up software environments help to make tech go obsolete much faster than necessary. Also, functional dependence on some other infrastructure (Apple Watch depends upon iPhone) doesn't help either.

Comment: Re:Nobody has the right not to be offended. (Score 1) 1134

by CityZen (#47835279) Attached to: Combating Recent, Ugly Incidents of Misogyny In Gamer Culture

Perhaps you missed the part about rape and death threats, and not just general ones, but the "I know where you live" kind?
I believe that courts have ruled that this is indeed not free speech, but criminal action.
But these criminals hide behind internet anonymity, so are difficult to prosecute.

This process can check if this value is zero, and if it is, it does something child-like. -- Forbes Burkowski, CS 454, University of Washington

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