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Joined 3 years ago
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Cake day: June 4th, 2023

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  • The answer to width is rolling resistance.

    Tires stick to road which is great for accelerating and breaking, but it makes maintaining your top speed harder. This doesn’t matter if you have a big engine, but it makes a difference if you’re cycling.

    For a road bike, you want to minimize the contact area of the tire with the road so you have very narrow tires and inflated a lot so that they don’t deform much under your weight.

    The type and width of tires changes depending on what you’re riding on. For off road you have wide knobbly tires that will catch in mud and push you forward. For riding on a beach you have very wide smooth tires for traveling over sand.

    The diameter is about stability. If you have small wheels turning fast it effectively lowers your center of gravity due to gyroscopic effects (this is a massive over simplification of the physics) big wheels turning more slowly results in a higher center of gravity, which is more stable.

    Cars have four wheels and don’t need to care about this.
















  • So this is pretty good.

    https://measuredcollective.com/is-google-forms-gdpr-compliant/

    It’s a list of things you need to do in order to make the use of Google forms gdpr compliant.

    One thing they don’t touch on is the use of personal accounts to collect data. People tend to use Google forms because it’s easy to set up using their personal account, but that essentially removes any company oversight from the collection and data processing. This makes it much harder to satisfy the data controller requirements.

    Of course if it’s an external contractor gathering the data and processing it independently, your company is likely to dismiss all this as not their problem.

    If it’s real academic research it will have had to go through ethics approval, and this should include data handling, and gdpr compliance.