Ronald Visser
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ronaldvisser.bsky.social
Ronald Visser
@ronaldvisser.bsky.social
Archaeology, Dendrochronology, Roman Archaeology, Digital Archaeology, Teaching, Data Science, Open Science

Works at Saxion University of Applied Sciences

https://orcid.org/0000-0001-6966-1729

https://akademienl.social/@RonaldVisser
Reposted by Ronald Visser
"De toegevoegde waarde van de landbouw is 13,3 miljard euro, terwijl de kosten door uitstoot en verlies van biodiversiteit 18,6 miljard bedragen. Daardoor resteert een jaarlijkse schadepost van 5,3 miljard euro".
Nederland zou welvarender, schoner en mooier zijn zonder vee-industrie
Deloitte: schade door landbouw miljarden groter dan opbrengsten
Kosten-batenanalyse: Milieuschade door landbouw leidt tot hoge maatschappelijke kosten, laat Deloitte zien. „Deze cijfers geven wel aan dat de problematiek nijpend is.”
www.nrc.nl
November 6, 2025 at 5:12 PM
Reposted by Ronald Visser
Just a few more days to get your paper and poster abstracts in for #CAA2026! CfP closes on Sunday 9 November - don't miss out! 2026.caaconference.org/call-for-pap...

#digital #archaeology
Call for Papers and Posters – CAA 2026
2026.caaconference.org
November 7, 2025 at 1:20 AM
Lauch of the local chaper of @caaint.bsky.social in Austria during the #CHNT conference in Vienna!
Nice to be there as the chair of @caanlfl
See for all CAA Chapters: caa-international.org/national-cha...
November 3, 2025 at 4:41 PM
Reposted by Ronald Visser
“Debunking such pseudoscience takes massively more energy than it takes to thoughtlessly produce it. Moreover, the hard work typically will fall on the shoulders of people most affected by such discriminatory research, further amplifying the harm done.”

irisvanrooijcogsci.com/2024/03/03/t...
The myth of value-free science*
Perhaps one of the most persistent myths in science—one that also pervades public perception of science—is that it provides a value-free method to arrive at objective Truth, with a big ‘T’. This my…
irisvanrooijcogsci.com
November 1, 2025 at 11:20 PM
Reposted by Ronald Visser
‘Study after study shows that students want to develop these critical thinking skills, are not lazy, and large numbers of them would be in favor of banning ChatGPT and similar tools in universities’, says @olivia.science www.ru.nl/en/research/...
‘Opposing the inevitability of AI at universities is possible and necessary’ | Radboud University
Since the widespread release of ChatGPT in December of 2022, AI has taken over much of the world by storm – including academia. Most of this happened with very little pushback, despite a myriad of iss...
www.ru.nl
November 1, 2025 at 10:26 PM
Reposted by Ronald Visser
Baumsärge der Bronzezeit: Luxusbestattungen 🌳⚱️

In der #Bronzezeit gab es eine besondere Art der Bestattung: Baumsärge. Eichenstämme wurden als Särge genutzt, in die Verstorbene gelegt wurden. Diese Grabstätten waren Luxusbestattungen ihrer Zeit 👑

Mehr: www.miss-jones.de/2020/05/17/b...
October 27, 2025 at 5:18 PM
New paper on our ARCfieldLAB project sharing insights on creating a platform disseminating knowledge on #remotesensing and #archaeology@jwhpverhagen.bsky.social
October 27, 2025 at 3:37 PM
Reposted by Ronald Visser
New paper in @canjforestres.bsky.social. We looked at changes in forest productivity and biodiversity in harvested and non-harvested forest stands in northern Appalachia. Lower harvest intensities and longer rotations support multiple ecosystem service capacity 🌎🧪🏡

cdnsciencepub.com/doi/full/10....
Impacts of management on ecosystem service capacity in northeastern U.S. Appalachian forest stands
Forests are critical resources that provide multiple ecosystem services. However, the capacity to produce these services depends on how forests are managed. The northeastern US is a highly forested an...
cdnsciencepub.com
October 24, 2025 at 7:19 PM
Reposted by Ronald Visser
NIEUWS | De regering bereidt zich voor op nieuwe klimaatzaken. Intern waarschuwen ambtenaren voor gevolgen van het niet halen van klimaatdoelen en adviseren om mogelijke dwangsommen te betalen uit het Klimaatfonds. Lees verder: argos.vpro.nl/artikelen/re...
Regering maakt zich klaar voor meer klimaatzaken, en wil dwangsommen mogelijk uit Klimaatfonds betalen
Het niet halen van de klimaatdoelen heeft geen harde juridische consequenties. Die indruk wekt de regering naar buiten toe althans. Intern waarschuwen ambtenaren voor pijnlijke gevolgen, en adviseren ...
argos.vpro.nl
October 24, 2025 at 6:07 AM
Reposted by Ronald Visser
Intact Roman vessels clearly below the ploughzone, removed from their context 😳

The archaeological equivalent of the movie character who digs out a bullet with a rusty penknife rather than going to a doctor…
Roman coins found by detectorist could be Wales' biggest find
David Moss discovered 15,000 coins at a "virtually untouched" secret location in north Wales.
www.bbc.com
October 23, 2025 at 7:23 AM
Reposted by Ronald Visser
@rtl.nl en @nieuws.nos.nl verspreidden een spookcijfer. Al in 2017 werd dit getal uit 2011 gedebunkt, maar bij het verkiezingsdebat zeven jaar later (!) popt het gewoon weer op.

Hoe het wel zit? Dat laten wij zien in deze nieuwste nieuwsbrief.
Misinformatie in het zorgdebat
Hoe RTL en NOS in een spookcijfer trapten
rodecijfers.substack.com
October 23, 2025 at 6:44 AM
Historische poster (1941-1943) voor alle partijen die vinden dat het bestrijden van antifascisme belangrijker is dan een democratische samenleving!
(Bron in alt text)
October 23, 2025 at 7:39 AM
Reposted by Ronald Visser
I am once again telling you that taking money from Musk makes you complicit in his instrumentalization of cultural heritage to support his beliefs. Taking funding from amoral entities is, in my opinion, not ethical and it is in fact harmful. www.finestresullarte.info/en/news/elon...
Elon Musk donates $1 million for archaeological sites in Rome
Through the Musk Foundation, the foundation established in 2021 to support international humanitarian and scientific projects, Elon Musk, has chosen to fund a program dedicated to Rome's archaeologica...
www.finestresullarte.info
October 21, 2025 at 8:26 PM
Zojuist "Sloppy Science" (www.lebowskipublishers.nl/boek/3331/st...) van @stanvanpelt.bsky.social, een boeiend boek over slordige en frauduleuze wetenschap. Een aanrader en gelukkig ook voorzien van positieve ideeën hoe wetenschap mooier en beter kan!
Sloppy science - Stan van Pelt - Lebowski Publishers
Van selectief shoppen uit meetresultaten, tot regelrechte datafabricage zoals in het geval van Diederik Stapel: onderzoekers nemen verrassend vaak een
www.lebowskipublishers.nl
October 21, 2025 at 7:59 PM
Reposted by Ronald Visser
New publication: Combined effects of CO2 and nitrogen on the #stoichiometry of toxin synthesis in a harmful #cyanobacterium. #climatechange #eutrophication
doi.org/10.1016/j.ha...
September 26, 2025 at 11:38 AM
Reposted by Ronald Visser
Nederland geeft fossielen Dubois-collectie terug aan Indonesië.

Statement en meer informatie te vinden op www.naturalis.nl/persberichte...
September 26, 2025 at 8:32 AM
Reposted by Ronald Visser
Opa die in verzet zat tegen nazi’s blijkt lid te zijn geweest van terroristische organisatie
Opa die in verzet zat tegen nazi’s blijkt lid te zijn geweest van terroristische organisatie
Opa Harm was tot voor kort dé trots van de familie: hij zat tijdens de Tweede Wereldoorlog in het verzet tegen de nazi’s.
speld.nl
September 19, 2025 at 12:28 PM
Reposted by Ronald Visser
When speaking to Tommy Robinson at the far right demonstration in London today, Elon Musk wore a t-shirt saying "What would Orwell think?"

So let's dive in - what would George Orwell think about Tommy Robinson and Elon Musk? 🧵
September 13, 2025 at 10:37 PM
Reposted by Ronald Visser
The Groyper Wars
September 13, 2025 at 1:15 AM
Dit jaar zijn we weer met Saxion University of Applied Sciences in Hessen voor de jaarlijkse internationale Summer Academy met een groep studenten en docenten van de opleiding Archeologie.
Gisteren kwam de Duitse televisie (ZDF) op bezoek en hebben dit tv-item gemaakt!

www.zdf.de/nachrichten/...
September 12, 2025 at 12:15 PM
Reposted by Ronald Visser
📢 CALL TO ACTION | EAA Leadership Overturns Democratic Vote Following Threats

Intimidation tactics forced the EAA to abandon solidarity with Gaza.

Archaeologists:
Cancel membership | Speak up | Share

Full statement: blacktrowelcollective.wordpress.com/2025/09/02/b...

#EAA2025 #Archaeology #Gaza
CALL TO ACTION | EAA Leadership Overturns Democratic Vote Following Threats
Intimidation Tactics Force Archaeological Association to Abandon Gaza Solidarity Last week the executive board of the European Association of Archaeologists took the decision, in light of the ongoi…
blacktrowelcollective.wordpress.com
September 2, 2025 at 5:24 PM
Reposted by Ronald Visser
PVV-programma wil trans mensen erkenning ontnemen, docenten screenen op "politieke neutraliteit", XR en Antifa als "terroristisch" aanmerken en verbieden, "Alle Syriërs terug", uit EVRM en VN-Vluchtelingenverdrag, verbod op "links-liberale seksuele indoctrinatie".

NOS: "er zijn scherpe randjes af".
August 23, 2025 at 10:51 AM
Reposted by Ronald Visser
Want to learn something about #water and #climate change?
A simple approximation is that for every degree C of warming, the atmosphere holds 7% more water. That's one factor behind the growing number of extreme flooding events.
August 22, 2025 at 5:11 AM
Reposted by Ronald Visser
Too often, I see people talk about a replication as if the first study has established something, and the replication study is a double-check. What people often fail to understand is that we do not do replication studies to *check* a finding, but to *establish* a finding. 1/x
August 17, 2025 at 6:36 AM
Reposted by Ronald Visser
New PNAS paper: "The entities enabling scientific fraud at scale are large, resilient, and growing rapidly"

www.pnas.org/doi/full/10....
The entities enabling scientific fraud at scale are large, resilient, and growing rapidly | PNAS
Science is characterized by collaboration and cooperation, but also by uncertainty, competition, and inequality. While there has always been some c...
www.pnas.org
August 17, 2025 at 7:29 AM