Viewing profile — crushthecurve

If there was a mobile contact tracing app that used AGPS with accuracy down to ~1m maybe it would be useful? Existing contact tracing apps use Bluetooth which can't be used to dete…

Contact tracing (of the human-powered kind) is obviously hugely important in reducing the scale of outbreaks in the early stages. However digital contact tracing has a fatal flaw: …

One of the numerous problems with the very concept of Bluetooth-based contact tracing is: it doesn't work. Due to all the hardware and environmental factors, it really works as a l…

It would be interesting to model two humans standing close to each other, and each phone on the closest side of the pairing, then on the opposite side, with the phones rotated at e…

It's interesting to consider that Bluetooth cannot be used to estimate distance between two devices in any meaningful way in real-world environments. A recent article [1] confirmed…

It's worth re-iterating how unreliable bluetooth signal strength is in estimating proximity. One recent data point using the CovidSafe app is here: https://twitter.com/jim_mussared…

The assumptions of benefit appear to rely on a naive theory of instantaneous contact and isolation, when in practice the entire process is unavoidably manual, requiring human intel…

The project lead of Singapore's TraceTogether initiative goes into detail about the problems with an automated system, and why a human-in-the-loop is ideally required to evaluate t…

If someone is determined as a close contact they have to legally self-isolate for 14 days regardless of symptoms or test results. The policy there probably reflects the understandi…

Another consideration that seems to have been obscured by the debate on privacy and the narrow focus on the particular client implementation of the app is the significant problem o…

In a regional context a bluetooth proximity app offers even less theoretical value. A contact is only registered after 15 minutes of time spent within an estimated proximity of 1.5…

A misunderstanding is that this system results in instantaneous contact notification and isolation (which is what one of the original papers on digital contact tracing efficacy ass…

We took a deeper look in an article linked in another comment on this thread. One thing that's interesting to think about more deeply is how difficult it is to estimate proximity b…

We've been looking at digital contact tracing from the perspective of Australia, as we see a huge push for the COVIDSafe app, based on Singapore's TraceTogether app. It seems the s…