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ProfCharlesHaas's profile
Charles Haas
Charles Haas
Charles Haas
@ProfCharlesHaas

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Charles Haas

@ProfCharlesHaas

Betz Prof. Environ Eng @DrexelCAEE Disinfection, #risk assess., #QMRA #COVID19 #water. Class of 2021 @TheNAEng usual disclaimers. Trolls blocked.

Philadelphia, PA
drexel.edu/engineering/ab…
Joined August 2011

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    Charles Haas‏ @ProfCharlesHaas 10 Sep 2021

    I don’t know who needs to hear this. I’m tired of people saying “exponential growth has started” Two graphs with same data. Left hand arithmetic plot. Right hand logarithmic plot. Exponential growth (linear on semilog) occurs before you see it on arithmetic scale.pic.twitter.com/WXP7uHr2bl

    4:16 PM - 10 Sep 2021
    • 75 Retweets
    • 244 Likes
    • Randi Byrnes selise Karen Cohn #BetterMasksInSharedAir #CleanSharedAir Robert Tudgey eo 🇨🇦💉💉💉😷 Rupert wilson Marie Clifford Louise B. Weschler Barbara Earl
    9 replies 75 retweets 244 likes
      1. Susan Dee‏ @SusanDeeW 11 Sep 2021
        Replying to @ProfCharlesHaas @microlabdoc

        I heard but no idea what you just said but I agree...

        0 replies 0 retweets 2 likes
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      1. Marvin‏ @MarvinH2_G2 11 Sep 2021
        Replying to @ProfCharlesHaas @microlabdoc

        Nobody could have foreseen the Winter/Summer spike Yet it goes up and down with our policies. Spot the missed opportunity July 2020, "Dido Test and Waste" and "Rishi Eat a Dishi" when we might have done a New Zealand with contact tracing that was more than a call centre.pic.twitter.com/H1YC2GgzFe

        0 replies 1 retweet 8 likes
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      1. Paul Dempsey‏ @dazult_pdempsey 11 Sep 2021
        Replying to @ProfCharlesHaas

        In fairness it can be difficult to say for sure, if you have a sudden change in environment in which each case introduced decays away but the rate of introduction is either constant or changing.

        0 replies 0 retweets 0 likes
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      1. The Autistic Educator.‏ @Theautisticedu1 11 Sep 2021
        Replying to @ProfCharlesHaas

        Check out NSW.

        0 replies 0 retweets 1 like
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      1. .‏ @jonbarnesgeo 11 Sep 2021
        Replying to @ProfCharlesHaas

        Why would you have such a large scale on the y axis with only small numbers? As you collect more data with larger y values, you can rescale.

        0 replies 0 retweets 0 likes
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      1. Dunc T‏ @Honestdunk 11 Sep 2021
        Replying to @ProfCharlesHaas @fascinatorfun

        Very enlightening, thank you.

        0 replies 0 retweets 0 likes
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      1. Don Oltmann‏ @oltmannd 3 Dec 2021
        Replying to @ProfCharlesHaas

        Yes! Exactly. Basic High School math.

        0 replies 0 retweets 2 likes
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      1. Dirk K‏ @DirkKS 3 Dec 2021
        Replying to @ProfCharlesHaas

        Dirk K Retweeted Jens von Bergmann

        https://twitter.com/vb_jens/status/1372251931444350976?s=21 …

        Dirk K added,

        Jens von Bergmann @vb_jens
        I have been thinking about how different people interpret data differently. And made this xkcd style graphic to illustrate this. pic.twitter.com/a8LvlmZxT7
        Show this thread
        0 replies 0 retweets 3 likes
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      1. The Autistic Educator.‏ @Theautisticedu1 24 Dec 2021
        Replying to @ProfCharlesHaas

        What do you say now prof? Classic J-curve in Australia.

        0 replies 0 retweets 0 likes
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