Professor Charles Haas
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Professor Charles Haas
@profcharleshaas.mastodon.social.ap.brid.gy
Betz Prof. Environ Eng - Drexel University. #Disinfection, #risk assess.,
#QMRA #COVID19
#water. Class of 2021 (US) National Academy of Engineering […]

[bridged from https://mastodon.social/@ProfCharlesHaas on the fediverse by https://fed.brid.gy/ ]
How worried are #obsidian users about the various discussions regarding possible malicious actors to alter plugins to either damage or harvest information from their entire file system? @obsidianmd @obsidian
September 28, 2025 at 6:39 PM
Reposted by Professor Charles Haas
Jeanine Finn just launched a survey on teaching with disappearing US govt data.
https://pomona.az1.qualtrics.com/jfe/form/SV_bjSXkhCl0NtwxZc

"This research is partly inspired by the rapid disappearance of some federal data from .gov websites in the early months of 2025. The implications of […]
Original post on fediscience.org
fediscience.org
August 18, 2025 at 1:50 PM
Reposted by Professor Charles Haas
The University of Michigan’s Department of Epidemiology, one of the best IMO, will not be admitting any PhD students for 2026 due to funding concerns brought about by the Trump Administration.
UMich cancels doctoral epidemiology program admissions for 2026
The University of Michigan School of Public Health will not admit a 2025-2026 admissions cycle cohort to its PhD in Epidemiologic Sciences program.
www.michigandaily.com
July 31, 2025 at 6:45 PM
File under history repeating itself. Increasing case counts in #harlem #nyc #legionella outbreak. #coolingtowers potentially once again may be a cause. https://www.nytimes.com/2025/07/31/well/legionnaires-disease-new-york-city-cases.html
August 1, 2025 at 11:45 AM
Reposted by Professor Charles Haas
The same people who deny that releasing 40+ billion tonnes of chemicals annually into the atmosphere changes our climate think that an airplane spraying a few tonnes of chemicals into the atmosphere definitely does. I want the world to be less stupid, as well as less evil.
July 12, 2025 at 12:29 PM
TIL That I could use #chatgpt to digitize points from a graph in a published paper
July 12, 2025 at 8:38 AM
I don't know who needs to hear this. A 100 year flood does not mean that it occurs only every 100 years. It means that any year there is a 1% chance of it occurring. #guadaluperiver #texasfloods #hydrology
July 7, 2025 at 8:14 PM
Reposted by Professor Charles Haas
Total Measles cases in Alberta have doubled in the last month to 1,000. The mathematics of this doubling mean another thousand will be infected in the next month, then 2,000 in August, and then 4,000 or more in September as students return to school. Unless the […]

[Original post on mstdn.ca]
June 21, 2025 at 4:33 AM
I am looking for some serious structured scientific paper writing workflow ideas from those familiar with #overleaf / #latex . I would really like to do serious outlining with notes as a first step. I’ve tried #scrivener, and its latex support is, IMHO, kludgy. I do a lot with general notetaking […]
Original post on mastodon.social
mastodon.social
June 21, 2025 at 2:25 PM
Somehow or other, this old quote by Richard J. Daley (the first Mayor Daley) during the 1968 Democratic Convention seems appropriate.
June 8, 2025 at 11:34 PM
I've been using #outlook for a number of years (I’m exclusively Apple, but my university uses #office365 / #exchange). Decided to try going back to #apple #mail also using #spamsieve ( @spamsieve ). After a few days, it seems so much better not to have to wrestle with the @MS behemoth and to […]
Original post on mastodon.social
mastodon.social
June 1, 2025 at 7:54 PM
Reposted by Professor Charles Haas
"Reeling from Trump contract cuts, the National Academies prepares for ‘a fairly radical downsizing’."
https://www.statnews.com/2025/05/23/national-academy-sciences-nasem-layoffs-after-trump-cuts-contracts-worth-40-million/

"The National Academies of Sciences, Engineering, and Medicine [<a href="/hashtag/NASEM" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link">#NASEM] […]
Original post on fediscience.org
fediscience.org
May 28, 2025 at 5:02 PM
#memorialday in the US. Never forget.
May 26, 2025 at 9:50 AM
Reposted by Professor Charles Haas
Why I’m Resigning from Positions at the National #science Foundation [<a href="/hashtag/nsf" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link">#nsf] &
#libraryofcongress

by Alondra Nelson

…Even as the White House threatens the foundational tenets of constitutional #democracy & continues to slash #funding for essential #socialservices, it is tempting to hope that […]
Original post on masto.ai
masto.ai
May 13, 2025 at 4:49 PM
Another potential act of malicious stupidity:

https://www.nytimes.com/2025/03/17/climate/trump-eliminates-epa-science.html?smtyp=cur&smid=bsky-nytimes

So many outstanding people in #usepa #ord have made advances to environmental protection. EPA has produced many valuable resources for […]
Original post on mastodon.social
mastodon.social
March 18, 2025 at 12:42 PM
Do we want to make America Polluted and Sick Again?

From my blog:

https://chaasblog.wordpress.com/2025/03/14/do-we-want-to-make-america-polluted-and-sick-again/
Do We Want to Make America Polluted and Sick Again?
> # “Those who cannot remember the past are condemned to repeat it.” The quote above is attributed to George Santayana (1905). Regrettably we seem to be in the midst of many who do not remember the past, never learned about the past, or find what happened in the past to be irrelevant. My particular interests are environmental quality and environmental health. I find the sledgehammering of key Federal agencies set up and designed to protect people and the environment from damages via exposure to man-made insults to be abhorrent. As a high school senior, I experienced the first Earth Day. US EPA was set up during my 1st year in college, and I was a personal witness to the establishment of the modern-day environmental charter. EPA and other environmental agencies, set up to protect public and environmental health were required because the vagaries of unfettered economic competition do not adequately assimilate long and short term adverse impacts from environmental degradation nor impairment of human health. The fact that such adverse impacts cannot be quantified with as much precision as the cost of a gallon of gasoline or a kWhr of electric energy does not make such costs less real. In the words of William Bruce Cameron, 1963: > “not everything that can be counted counts, and not everything that counts can be counted” Source Since the 1970’s, progress had been made at avoiding prior incidents, and reversing and restoring damages from previous environmental insults. There has been great progress. I am a firm believer in the following maxims: “if it ain’t broke, don’t fix it” “an ounce of prevention is worth a pound of cure” NOT: “move fast and break things” It is important to understand where we have come from so that we do not go back. In this spirit, I will try to follow up on this blog with short pieces on the progress that was made. > ### Share this: * Twitter * Facebook * LinkedIn * Email * Like Loading... ### _Related_
chaasblog.wordpress.com
March 14, 2025 at 8:52 PM
Reposted by Professor Charles Haas
When right wingers wail about our military effectiveness, remind them why we added fluoride to our water.
March 5, 2025 at 11:44 AM
Disturbing to read this:
“National Academies is altering pending reports to appease Trump administration, some members say” https://www.statnews.com/2025/02/20/national-academies-altering-pending-reports-to-appease-trump-administration-members-say/
#nasem
February 25, 2025 at 2:12 PM
Eating One's Seed Corn - some thoughts on current events and research.

https://chaasblog.wordpress.com/2025/02/19/eating-ones-seed-corn/
Eating One’s Seed Corn
<p>I was going to start a longer blog post, which I hope to finalize in the next day or so.  But current times (as I write this, it is immediately after the St. Valentine’s Day Massacre of personnel in the Federal Government) really drive me to put something out more quickly.</p> <p>There is an apt phrase, with which I titled this piece, of consuming harvest that should have been left for subsequent crops, thereby forestalling the opportunity for the next harvest.</p> <p>There ought to be no doubt that a continued stream of commercial innovation and economic progress requires a continued stream of a pipeline of research from fundamental to applied to translational.  If the initial flows of fundamental and applied research are cut off, there will inevitably be a future forestalling of commercial innovation.</p> <p>If we think of innovations in all sectors, such as the polymerase chain reaction, transistors and integrated circuits, the internet, gene therapy, battery technology for electric vehicles, etc., few if any of them could have occured without contributions from fundamental and applied research.</p> <p>If one wanted to slow the pace of future innovation, one would stanch research at universities and research institutions and restrict and wither agencies, such as NSF, NIH, DOD and DOE that support such research.  Unfortunately this seems to be occurring in real time.</p> <p>Without this pipeline, responding to challenges such as population growth and migration, climate change, loss of biodiversity, aging demographics, and emergence of pandemic potential diseases will become increasingly difficult.</p> <p>It is worrisome.  As a senior academic, I will do my best to support my junior colleagues.</p> <p>As is frequently the case, Benjamin Franklin said it aptly:</p> <blockquote> <p>We must, indeed, all hang together or, most assuredly, we shall all hang separately.</p> </blockquote> <p>My thoughts and wishes are with all who have been or will be harmed by actions that occurred and will be occurring, including EPA, NSF, NIH, FDA, USDA, NASA, NOAA …, and to those researchers who have benefited from these dedicated government servants.</p> <div id="atatags-370373-67b61f4ba12cd"> <script type="text/javascript"> __ATA.cmd.push(function() { __ATA.initVideoSlot('atatags-370373-67b61f4ba12cd', { sectionId: '370373', format: 'inread' }); }); </script> </div><span id="wordads-inline-marker" style="display: none;"></span> <div id="atatags-26942-67b61f4ba1309"></div> <script> __ATA.cmd.push(function() { __ATA.initDynamicSlot({ id: 'atatags-26942-67b61f4ba1309', location: 120, formFactor: '001', label: { text: 'Advertisements', }, creative: { reportAd: { text: 'Report this ad', }, privacySettings: { text: 'Privacy', } } }); }); </script><div class="sharedaddy sd-like-enabled sd-sharing-enabled" id="jp-post-flair"><div class="sharedaddy sd-sharing-enabled"><div class="robots-nocontent sd-block sd-social sd-social-icon-text sd-sharing"><h3 class="sd-title">Share this:</h3><div class="sd-content"><ul><li class="share-twitter"><a class="share-twitter sd-button share-icon" data-shared="sharing-twitter-136" href="https://chaasblog.wordpress.com/2025/02/19/eating-ones-seed-corn/?share=twitter" rel="nofollow noopener noreferrer" target="_blank" title="Click to share on Twitter"><span>Twitter</span></a></li><li class="share-facebook"><a class="share-facebook sd-button share-icon" data-shared="sharing-facebook-136" href="https://chaasblog.wordpress.com/2025/02/19/eating-ones-seed-corn/?share=facebook" rel="nofollow noopener noreferrer" target="_blank" title="Click to share on Facebook"><span>Facebook</span></a></li><li class="share-linkedin"><a class="share-linkedin sd-button share-icon" data-shared="sharing-linkedin-136" href="https://chaasblog.wordpress.com/2025/02/19/eating-ones-seed-corn/?share=linkedin" rel="nofollow noopener noreferrer" target="_blank" title="Click to share on LinkedIn"><span>LinkedIn</span></a></li><li class="share-email"><a class="share-email sd-button share-icon" data-email-share-error-text="If you're having problems sharing via email, you might not have email set up for your browser. 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chaasblog.wordpress.com
February 19, 2025 at 6:20 PM
Reposted by Professor Charles Haas
Ethan Marcotte, who is one of the most principled and thoughtful people I have ever known and also a dear friend, has resigned from his job at 18F after being asked to meet with shadowy gov-dismantlers. The whole post is worth reading.

https://ethanmarcotte.com/wrote/leaving-18f/
Moving on from 18F. — ethanmarcotte.com
I had a wonderful job, until I didn’t. This is about what happened—and what is happening.
ethanmarcotte.com
February 18, 2025 at 10:31 PM
Reposted by Professor Charles Haas
We got a message from the university to remove any use of the "DEI", "diversity", "equity", or "inclusion" from all public-facing documents. They said that even "biodiversity" is being flagged by the federal government. We live in the dumbest timeline.
February 11, 2025 at 8:48 AM
I’ve used this article as a touchpoint when I give a guest lecture on engineering ethics to our seniors: “The Nazi engineers: reflections on technological ethics in hell “ Becoming more relevant regrettably.
#engineeringethics #engineeringeducation #ethics

https://pubmed.ncbi.nlm.nih.gov/20844979/
The Nazi engineers: reflections on technological ethics in hell - PubMed
Engineers, architects, and other technological professionals designed the genocidal death machines of the Third Reich. The death camp operations were highly efficient, so these technological professionals knew what they were doing: they were, so to speak, good engineers. As an educator at a technolo …
pubmed.ncbi.nlm.nih.gov
January 31, 2025 at 10:06 AM
@ivory : refreshing my home timeline on mastodon.social @staff seems to be stalled
January 31, 2025 at 12:23 AM