Robert Lepage, PhD., P.Eng.
@rtmlepage.bsky.social
Building Science Engineer + Climate Resilience Geek.
Of the 347ppm generation. He/him.
Of the 347ppm generation. He/him.
Pinned
Ah, ça ira!
Reposted by Robert Lepage, PhD., P.Eng.
"For Canada to thrive we must decide whether we are a #PetroState of the past or an #ElectroState of the future. Only one has a prosperous place in the #ClimateEra & a majority of Canadians already want stronger #ClimateAction. What's missing is a government willing to act like it." #cdnpoli #abpoli
Are we really MOVING BACKWARDS on #ClimateChange in Canada in spite of the hottest years on record & the worst #WILDFIRES and #SMOKE we've ever seen? We dig in with #CAPE & the Hub's own Dr Joe Vipond & #CANRAC 's Caroline Brouillette
PODCAST www.podcastics.com/episode/3955... #MarkCarney #cdnpoli
PODCAST www.podcastics.com/episode/3955... #MarkCarney #cdnpoli
Carney Banks On Big Oil
Canada's Climate Capitulation
www.podcastics.com
January 2, 2026 at 8:09 PM
"For Canada to thrive we must decide whether we are a #PetroState of the past or an #ElectroState of the future. Only one has a prosperous place in the #ClimateEra & a majority of Canadians already want stronger #ClimateAction. What's missing is a government willing to act like it." #cdnpoli #abpoli
So, I may have added a bit too much cognac to this French Plombière/Trifle hybrid, but not enough to dissuade an adult palate... rather to keep the kids away.
December 31, 2025 at 8:29 PM
So, I may have added a bit too much cognac to this French Plombière/Trifle hybrid, but not enough to dissuade an adult palate... rather to keep the kids away.
Reposted by Robert Lepage, PhD., P.Eng.
Respectfully Jon Stewart, you were wrong on the @weeklyshowpodcast.bsky.social to mock people who mask. ICYMI: there are tens of millions of Americans who have been disabled by #LongCOVID and must do everything in their power to prevent further infections that make them vulnerable to further
1/
1/
December 29, 2025 at 12:30 PM
Respectfully Jon Stewart, you were wrong on the @weeklyshowpodcast.bsky.social to mock people who mask. ICYMI: there are tens of millions of Americans who have been disabled by #LongCOVID and must do everything in their power to prevent further infections that make them vulnerable to further
1/
1/
Reposted by Robert Lepage, PhD., P.Eng.
Amazing that this review paper from 2021 just became my most cited paper of my 30+ yr career. I am honored to have been the lead first co-corresponding author with @ChiaWang8. COVID is indeed airborne--as are most other respiratory viruses. @ucsandiego.bsky.social
www.science.org/doi/full/10....
www.science.org/doi/full/10....
Airborne transmission of respiratory viruses
A Review discusses the scientific basis of and factors controlling airborne transmission of respiratory viruses including coronavirus.
www.science.org
December 27, 2025 at 11:51 PM
Amazing that this review paper from 2021 just became my most cited paper of my 30+ yr career. I am honored to have been the lead first co-corresponding author with @ChiaWang8. COVID is indeed airborne--as are most other respiratory viruses. @ucsandiego.bsky.social
www.science.org/doi/full/10....
www.science.org/doi/full/10....
Reposted by Robert Lepage, PhD., P.Eng.
PSA: if you live in Ontario, Québec, New Brunswick, or Nova Scotia, you can order native plant seeds for FREE from the Ottawa Wildflower Seeds Library. Their annual seed giveaway starts today! wildflowerseedlibrary.ca
Ottawa Wildflower Seed Library – The Ottawa Wildflower Seed Library
wildflowerseedlibrary.ca
December 26, 2025 at 8:27 PM
PSA: if you live in Ontario, Québec, New Brunswick, or Nova Scotia, you can order native plant seeds for FREE from the Ottawa Wildflower Seeds Library. Their annual seed giveaway starts today! wildflowerseedlibrary.ca
This is probably the highlight for this year.
December 25, 2025 at 5:44 PM
This is probably the highlight for this year.
Reposted by Robert Lepage, PhD., P.Eng.
You may have seen masks mentioned a lot lately, especially as the spread of multiple viruses is currently high, so it’s important to know the facts in order to protect yourself and others. Learn more and stay safe this respiratory virus season and beyond! (Part 1/2)
December 23, 2025 at 6:27 PM
You may have seen masks mentioned a lot lately, especially as the spread of multiple viruses is currently high, so it’s important to know the facts in order to protect yourself and others. Learn more and stay safe this respiratory virus season and beyond! (Part 1/2)
House Hippos, on the other hand, are perfectly acceptable gift for a Canadian.
Hi, hippopotamus expert here! You might think this is cute or funny, but hippos only mug for the camera like this when they are super sick of hearing a terrible holiday song about them that should have been taken off the radio 70 years ago. Do better
December 24, 2025 at 1:46 PM
House Hippos, on the other hand, are perfectly acceptable gift for a Canadian.
The problem with timing some of your major life events (e.g. anniversaries) with the solar cycle is that the dates shift around a bit. Partners may not be as sympathetic to an absolute time keeping method and would prefer to stick to calendar dates instead.
December 21, 2025 at 1:49 PM
The problem with timing some of your major life events (e.g. anniversaries) with the solar cycle is that the dates shift around a bit. Partners may not be as sympathetic to an absolute time keeping method and would prefer to stick to calendar dates instead.
Euh @cbcpitchbot.bsky.social, did you write this headline?
Is there no adult supervision at the CBC? You don't write headlines like that.
Is there no adult supervision at the CBC? You don't write headlines like that.
December 20, 2025 at 3:14 PM
Euh @cbcpitchbot.bsky.social, did you write this headline?
Is there no adult supervision at the CBC? You don't write headlines like that.
Is there no adult supervision at the CBC? You don't write headlines like that.
Reposted by Robert Lepage, PhD., P.Eng.
#AcademicSky
Students PREFER using LLM/AI to notetaking...
... but experiment shows lower comprehension & retention
It's like they say, you gotta put in the work to understand things better. No pain, no gain.
Shortcuts are, well.... shortcuts.
www.sciencedirect.com/science/arti...
Students PREFER using LLM/AI to notetaking...
... but experiment shows lower comprehension & retention
It's like they say, you gotta put in the work to understand things better. No pain, no gain.
Shortcuts are, well.... shortcuts.
www.sciencedirect.com/science/arti...
Effects of LLM use and note-taking on reading comprehension and memory: A randomised experiment in secondary schools
Students' rapid uptake of Generative Artificial Intelligence tools, particularly large language models (LLMs), raises urgent questions about their eff…
www.sciencedirect.com
December 19, 2025 at 4:58 PM
#AcademicSky
Students PREFER using LLM/AI to notetaking...
... but experiment shows lower comprehension & retention
It's like they say, you gotta put in the work to understand things better. No pain, no gain.
Shortcuts are, well.... shortcuts.
www.sciencedirect.com/science/arti...
Students PREFER using LLM/AI to notetaking...
... but experiment shows lower comprehension & retention
It's like they say, you gotta put in the work to understand things better. No pain, no gain.
Shortcuts are, well.... shortcuts.
www.sciencedirect.com/science/arti...
Reposted by Robert Lepage, PhD., P.Eng.
ATTENTION 🇨🇦 Hospitals & LTC
Does your hospital or LTC facility want to be part of a groundbreaking Pilot Project including FREE installation of Upper Air UV?
Pls see below & drop me a note.
Cheers 🙂
Does your hospital or LTC facility want to be part of a groundbreaking Pilot Project including FREE installation of Upper Air UV?
Pls see below & drop me a note.
Cheers 🙂
December 19, 2025 at 3:47 PM
ATTENTION 🇨🇦 Hospitals & LTC
Does your hospital or LTC facility want to be part of a groundbreaking Pilot Project including FREE installation of Upper Air UV?
Pls see below & drop me a note.
Cheers 🙂
Does your hospital or LTC facility want to be part of a groundbreaking Pilot Project including FREE installation of Upper Air UV?
Pls see below & drop me a note.
Cheers 🙂
Reposted by Robert Lepage, PhD., P.Eng.
4/
▶️ "If all HCWs wore N95 masks during treatment, the total hourly infection risk would decrease by 94.7 %".
▶️ "If all HCWs wore surgical masks, the total hourly infection risk would be reduced by 53.9 %".
Via @countrybee2.bsky.social
www.sciencedirect.com/science/arti...
▶️ "If all HCWs wore N95 masks during treatment, the total hourly infection risk would decrease by 94.7 %".
▶️ "If all HCWs wore surgical masks, the total hourly infection risk would be reduced by 53.9 %".
Via @countrybee2.bsky.social
www.sciencedirect.com/science/arti...
Transmission of respiratory infectious diseases based on real close contact behavior in an emergency room
The risk of transmission of respiratory infectious diseases in emergency rooms is high, posing a severe threat to the health of healthcare workers (HC…
www.sciencedirect.com
December 19, 2025 at 12:14 PM
4/
▶️ "If all HCWs wore N95 masks during treatment, the total hourly infection risk would decrease by 94.7 %".
▶️ "If all HCWs wore surgical masks, the total hourly infection risk would be reduced by 53.9 %".
Via @countrybee2.bsky.social
www.sciencedirect.com/science/arti...
▶️ "If all HCWs wore N95 masks during treatment, the total hourly infection risk would decrease by 94.7 %".
▶️ "If all HCWs wore surgical masks, the total hourly infection risk would be reduced by 53.9 %".
Via @countrybee2.bsky.social
www.sciencedirect.com/science/arti...
Reposted by Robert Lepage, PhD., P.Eng.
LA wildfires public health impacts:
What is the main finding?
Local residents experienced a 24% excess in pulmonary illness, a 46% excess in myocardial infarction, and a 118% excess in systemic illness requiring emergency medical attention.
What is the main finding?
Local residents experienced a 24% excess in pulmonary illness, a 46% excess in myocardial infarction, and a 118% excess in systemic illness requiring emergency medical attention.
December 18, 2025 at 11:20 PM
LA wildfires public health impacts:
What is the main finding?
Local residents experienced a 24% excess in pulmonary illness, a 46% excess in myocardial infarction, and a 118% excess in systemic illness requiring emergency medical attention.
What is the main finding?
Local residents experienced a 24% excess in pulmonary illness, a 46% excess in myocardial infarction, and a 118% excess in systemic illness requiring emergency medical attention.
Reposted by Robert Lepage, PhD., P.Eng.
Come and join us at Imperial College to work a project looking at mechanisms in Long Covid and ME/CFS
We're looking for:
A keen, experienced Research Nurse
A gifted molecular immunologist with a strong bioinformatics background
www.imperial.ac.uk/.../descript....
www.imperial.ac.uk/.../descript....
We're looking for:
A keen, experienced Research Nurse
A gifted molecular immunologist with a strong bioinformatics background
www.imperial.ac.uk/.../descript....
www.imperial.ac.uk/.../descript....
www.imperial.ac.uk
December 18, 2025 at 10:48 AM
Come and join us at Imperial College to work a project looking at mechanisms in Long Covid and ME/CFS
We're looking for:
A keen, experienced Research Nurse
A gifted molecular immunologist with a strong bioinformatics background
www.imperial.ac.uk/.../descript....
www.imperial.ac.uk/.../descript....
We're looking for:
A keen, experienced Research Nurse
A gifted molecular immunologist with a strong bioinformatics background
www.imperial.ac.uk/.../descript....
www.imperial.ac.uk/.../descript....
Reposted by Robert Lepage, PhD., P.Eng.
Great infographic from "Countering the Climate Change Counter Movement: Six lessons from Canada's climate delays" (pub Dec 11, 2025)
Infographic: ars.els-cdn.com/content/imag...
Full paper (FREE PDF available):
www.sciencedirect.com/science/arti...
Infographic: ars.els-cdn.com/content/imag...
Full paper (FREE PDF available):
www.sciencedirect.com/science/arti...
December 17, 2025 at 4:42 PM
Great infographic from "Countering the Climate Change Counter Movement: Six lessons from Canada's climate delays" (pub Dec 11, 2025)
Infographic: ars.els-cdn.com/content/imag...
Full paper (FREE PDF available):
www.sciencedirect.com/science/arti...
Infographic: ars.els-cdn.com/content/imag...
Full paper (FREE PDF available):
www.sciencedirect.com/science/arti...
Reposted by Robert Lepage, PhD., P.Eng.
Reposted by Robert Lepage, PhD., P.Eng.
“If we want to use [Direct Air Capture] to limit overall warming to 1.5C, while emitting enough to reach 2.5C, DAC would need to use something like 30% of all electricity consumed over the next 80 years.”
December 17, 2025 at 8:19 PM
“If we want to use [Direct Air Capture] to limit overall warming to 1.5C, while emitting enough to reach 2.5C, DAC would need to use something like 30% of all electricity consumed over the next 80 years.”
Reposted by Robert Lepage, PhD., P.Eng.
Main paper:
www.medrxiv.org/content/10.6...
www.medrxiv.org/content/10.6...
December 17, 2025 at 1:40 PM
Main paper:
www.medrxiv.org/content/10.6...
www.medrxiv.org/content/10.6...
Reposted by Robert Lepage, PhD., P.Eng.
I've spent all day struggling to write a single page of a popular science article. I bang away at a word processor; give up; start diagramming on paper. Take some notes; draft a few sentences in pen; return to the computer...and very slowly I figure out what I was trying to say in the first place.
December 16, 2025 at 11:41 PM
I've spent all day struggling to write a single page of a popular science article. I bang away at a word processor; give up; start diagramming on paper. Take some notes; draft a few sentences in pen; return to the computer...and very slowly I figure out what I was trying to say in the first place.
Reposted by Robert Lepage, PhD., P.Eng.
Over the years I've noticed several different types of people landing on doom for different reasons. I have a bit of insight into their reasons due to being in the position of being the provider of local projections for adaptation so they often end up exposing their motivated reasoning to me ... 1/x
December 14, 2025 at 5:37 PM
Over the years I've noticed several different types of people landing on doom for different reasons. I have a bit of insight into their reasons due to being in the position of being the provider of local projections for adaptation so they often end up exposing their motivated reasoning to me ... 1/x
First, I log Quickbooks online and I'm introduced to their "new GenAI" business helper tool!
Excellent, Intuit is now knowingly providing a defective tool that they say can help answer business related questions but that you shouldn't rely on it to make business related decision.
Excellent, Intuit is now knowingly providing a defective tool that they say can help answer business related questions but that you shouldn't rely on it to make business related decision.
December 12, 2025 at 3:24 PM
First, I log Quickbooks online and I'm introduced to their "new GenAI" business helper tool!
Excellent, Intuit is now knowingly providing a defective tool that they say can help answer business related questions but that you shouldn't rely on it to make business related decision.
Excellent, Intuit is now knowingly providing a defective tool that they say can help answer business related questions but that you shouldn't rely on it to make business related decision.
It's the dumbest of bond villain approaches:
"See Mr. Bond, I have embedded the shittest product imaginable in every layer of the economy. If you don't pay my ONE GAJILLION $ every day, my machine will fail and collapse the economy!"
"See Mr. Bond, I have embedded the shittest product imaginable in every layer of the economy. If you don't pay my ONE GAJILLION $ every day, my machine will fail and collapse the economy!"
Sam Altman: hey I made a machine that stole literally all your stuff in order to make CSAM of your child actors, sometimes it encourages people to kill themselves
Disney: Holy shit here's a billion dollars
Altman: the machine loses more than that each week but thank you. Soon it will become god.
Disney: Holy shit here's a billion dollars
Altman: the machine loses more than that each week but thank you. Soon it will become god.
December 12, 2025 at 2:24 PM
It's the dumbest of bond villain approaches:
"See Mr. Bond, I have embedded the shittest product imaginable in every layer of the economy. If you don't pay my ONE GAJILLION $ every day, my machine will fail and collapse the economy!"
"See Mr. Bond, I have embedded the shittest product imaginable in every layer of the economy. If you don't pay my ONE GAJILLION $ every day, my machine will fail and collapse the economy!"
Reposted by Robert Lepage, PhD., P.Eng.
Via Rail’s quality of service is far, far below international standards – Canadians need to stop normalizing this:
“Via Rail passengers arrived in Ottawa more than 12 hours late on Thursday, after “serious mechanical issues” forced them to spend the night sitting on a train in Brockville, Ontario”
“Via Rail passengers arrived in Ottawa more than 12 hours late on Thursday, after “serious mechanical issues” forced them to spend the night sitting on a train in Brockville, Ontario”
Via Rail passengers spend night on train in Brockville, Ont. after ‘operational constraint’
Via Rail passengers arrived in Ottawa more than 12 hours late on Thursday, after “serious mechanical issues” forced them to spend the night sitting on a train in Brockville, Ont.
www.ctvnews.ca
December 11, 2025 at 5:47 PM
Via Rail’s quality of service is far, far below international standards – Canadians need to stop normalizing this:
“Via Rail passengers arrived in Ottawa more than 12 hours late on Thursday, after “serious mechanical issues” forced them to spend the night sitting on a train in Brockville, Ontario”
“Via Rail passengers arrived in Ottawa more than 12 hours late on Thursday, after “serious mechanical issues” forced them to spend the night sitting on a train in Brockville, Ontario”