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raphaelj

2,169 karma · joined October 1, 2011

Portofolio -> https://www.raphaelj.be/

https://github.com/RaphaelJ/

https://datethis.app https://noisycamp.com

submissionscomments
raphaelj··on Show HN: A decentralized and anonymous contact-tracing app
New discussion here: https://github.com/RaphaelJ/covid-tracer/blob/master/README....
raphaelj··on Show HN: An open-source and decentralized COVID-19 contact-tracing app
Hi, OP here,

I started working on this app a couple of weeks ago, trying to iterate on Singapore's contact-tracking app by adding data anonymization and decentralization features.

I ended up with a solution that is similar to the D3P-T, with some implementation differences.

The app is available as an APK for Android [1]. As for now, the iOS app is not easy to distribute, as Apple does not allow coronavirus-related apps to be published on the app store.

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[1] https://github.com/RaphaelJ/covid-tracer/blob/master/release....

raphaelj··on Show HN: A decentralized and anonymous contact-tracing app
Indeed ... I might try to repost it later this week.
raphaelj··on NHS rejects Apple-Google coronavirus app plan
It's totally possible to create an anonymous and decentralised contact tracing app that does not share private data. That is what Apple-Google are working on, and what projects such as D3P-T, or my hobby contact tracing app [1] are trying to achieve.

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[1] https://github.com/RaphaelJ/covid-tracer/blob/master/README....

raphaelj··on NHS rejects Apple-Google coronavirus app plan
That's very bad. Anonymous and (mostly) decentralized contact tracing is definitively possible, and is exactly what the D3P-T and Apple/Google protocols are trying to achieve.

Developing a reasonably anonymous contact-tracing app is not that complex at all. I wrote a very simple (but working) app that also implements contact-tracing in a way similar to D3P-T or Apple/Google, and it only took me a few days: https://github.com/RaphaelJ/covid-tracer/blob/master/README....

Users will also never opt-in for such apps if they don't at least try to slightly protect privacy.

raphaelj··on Show HN: A decentralized and anonymous contact-tracing app
The Apple+Google solution is technically very similar.

The main issue with contact tracers today is on iOS: Apple does not allow an application to perform a Bluetooth scan if the application is not on the screen and the phone unlocked. Apple and Google solution is thus to provide a tracing API that would allow such scanning capabilities if for contract tracing.

The details are not well known yet, so it's hard to say what will be the privacy issues. We don't know how the API will be implemented either, it could be totally opt-in if provided as a signed application instead of an OS update.

Really appreciate the remark about the README as English isn't my native language.

raphaelj··on Show HN: A decentralized and anonymous contact-tracing app
Hi, OP here,

I started working on this app a couple of weeks ago, trying to improve Singapore's model of using Bluetooth tracking by adding data anonymization and decentralization features.

I ended up with a solution that is similar to the D3P-T, with some implementation differences.

The app is available as an APK for Android [1]. As for now, the iOS app is not easy to distribute, as Apple does not allow coronavirus-related apps to be published on the app store.

--

[1] https://github.com/RaphaelJ/covid-tracer/blob/master/release...

raphaelj··on Coronavirus Country Comparator
The government actually issues the two numbers [1].

Current (Apr 26) toll is 7,094 if you include suspected deaths, but is 3,596 if you only count positive cases.

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[1] https://covid-19.sciensano.be/sites/default/files/Covid19/De...

raphaelj··on The epidemiologist behind Sweden’s controversial coronavirus strategy
It looks like Germany put lockdown measures in place about a week earlier than France, Belgium or the Netherlands, if you compare the number of deaths at the time the mesures were enforced.

Getting a lockdown in place a week earlier mathematically translates in a 4x reduction in deaths a few weeks later, which is more or less what we see when comparing France and Germany.

Likewise the UK enforced the lockdown a few days later than France (proportionally to the state of the pendemic at the time of the measures), more or less like Spain. Looks like they are both heading towards 30k or 40k deaths until the pendemic gets under control. A few days really matter when you're fighting a pendemic that double in size every 3 days.

raphaelj··on Preliminary result of the Gangelt, Germany Covid-19 case cluster study [pdf]
r0 can stay the same, it can just means that the epidemic "took off" earlier than what our tests show.
raphaelj··on Corona App – 10 requirements for the evaluation of “Contact Tracing” apps
As a side note, Android requires an app to get location access when using Bluetooth (not sure about iOS). So any Bluetooth contract tracing app will request location access.
raphaelj··on French companies benefiting from state aid can't buy back shares
That makes sense.

But what about prioritising partial nationalisation of these companies by injecting cash in exchange for shares? That way it would have no impact on the net public debt, as the gouvernement assets increase at the same rate as the debt.

raphaelj··on New research shows social distancing a must to beat Covid-19
While you're correct in the term being wrong, I don't think anybody misinterprets it. Moreover, the recommended 2m/6ft gap makes it clear that we are talking about physical distance, not purely social.
raphaelj··on The hard part of the economics of Covid-19
These approval processes are there for a reason though. If you are going to inject some pathogen to millions of people, you better be sure that it has no strong, even long term, undesirable effect.
raphaelj··on The hard part of the economics of Covid-19
Most hospitalised people will only need non invasive respiratory support and surveillance. I guess these cases could be handled by purposely trained health workers.
raphaelj··on Why the second wave of the 1918 Spanish flu was so deadly
The article does not answer the question, except for "it mutated"
raphaelj··on Tesla’s success in Europe catches industry off guard
Aside luxury cars, it seems like German manufacturers are also losing against French manufacturers in the electric compact car market.

Peugeot and Renault are having a decent success with their latest cars: https://uk.motor1.com/news/401562/europe-ev-sales-january-20...

raphaelj··on I have the coronavirus. So far, it isn't that bad
Except that this is significantly more dangerous than the seasonal flu. 6 people already died on the Diamond Princess out of about 600 detected positive cases, this is one to two orders of magnitude more than the seasonal flu.
raphaelj··on AMD Launches Ultra-Low-Power Ryzen Embedded APUs
Why would you use such a ultra low power SOC in a MRI scanner?
raphaelj··on Japan's PM to ask all schools to temporarily close
But luckily most of the contamination happens through cough, so that these people that don't show symptoms are also less contagious.
raphaelj··on Facebook tax court trial begins over Ireland offshore deal
What would be the alternative to the current taxation scheme of digital goods?

Could we imagine the tax rate being weighted by the revenue made in a specific fiscal area? Lets say that if FB makes 40% of its revenue in the US where the corporate tax rate is 27%, the IRS could tax FB profits at a 11% rate (27% x 40%).

raphaelj··on I Learned French in 12 Months
As a French native speaker, I'm a little bit surprised by the corrected text OP posted in her/his article (http://www.runwes.com/images/learningfrench/image1.png).

Most of the corrections she/he received are not justified at all. Like using the work "crédits" is totally fine in this context. I can't get why they corrected some connectors like "à" or "pour", as the usage of these in the text seem at least as correct to me.

raphaelj··on Lumière’s Train in 4K
Is it me, or the first and second video are totally different shots ? The train, people and station look totally different.
raphaelj··on Ask HN: How do you process payments?
Is there any use policy restriction on Stripe, Molly and/or Braintree that would prevent one to dynamically select one or another payment provider depending on the quoted fee for a given customer (card type, country, currency...)?
raphaelj··on Hyundai Motor to invest $87 bn in future mobility tech by 2025
They can also partially reallocate their current development spending toward that goal. They are also most probably already spending significant amounts in this area.
raphaelj··on Microsoft 4-day week boosts productivity and sales
I've been working 4d/week for the past 2 years as a software engineer, and it would be very hard for me to go back to a full time position.

I'm pretty sure I'm making more right now compared to how much I was when working full time.

I explain this by having had more time to become a better engineer, as I've been able to spend time on side projects (learning new things), distancing myself from my professional duties (thus avoiding unnecessary/inefficient work), and recovering better during the weekends. Exercising more probably helped a lot too.

Overall, I deeply think that more small tech companies should start offering 4d/week positions, as it will make them able to compete against bigger companies that can offer bigger compensations. Most of the best programmers I know would happily trade a 15% net income reduction for an additional day off. This is also reflected by how popular such articles get on Hacker News or Reddit.

As a side note, part time work for white-collar positions is already very common in the Netherlands[1], and the country if one of the richest in the world.

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[1] https://www.economist.com/the-economist-explains/2015/05/11/...

raphaelj··on Six cars aced new pedestrian detection tests
Because they are not?
raphaelj··on New In Postgres 12: Generated Columns
Indeed. SQL concepts are insanely powerful, but the language itself feels a little bit old.
raphaelj··on Will America's debt doom us?
The Fed might be independent in the law, but the govt makes the law.
raphaelj··on In the Netherlands, a group of scientists is working on feeding 11 billion
Creating a such amount of money will just create inflation. You'll end up with exactly as much purchasing power, is not less.
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