James A Campbell

Here's a thread of all my paper announcements:

Highlights from the #acoustictelemetry ETN symposium this week in Copenhagen...

FYI, the previous OPi and OPs is based on the older pulse phase modulation (PPM) method for signal transmission. Binary phase shift key (BPSK) is the "newer" method that the manufacturers and community broadly seem to agree will become the new standard for all underwater #acoustictelemetry.

Highlights from the #acoustictelemetry ETN symposium this week in Copenhagen...

At the manufacturer forum, Innovasea claimed to be supporting Open Protocol (OP) tags... However, when Kim Aarestrup specifically asked about the newer OP BPSK protocol, innovasea responded with: "We have not seen the spec of the BPSK [open protocol] yet, so cannot comment if we will support it."

They further claimed the Memorandum Of Understanding (required to view and use the new OP) violated EU laws, and hence they could not sign it to review the protocol. ...however, other manufacturers have already signed the MOU and are in the process of implementing the new OP BPSK protocol.

Highlights from the #acoustictelemetry ETN symposium this week in Copenhagen...

besjournals.onlinelibrary.wiley.comInferring activity patterns of aquatic animals from single‐receiver acoustic telemetry setupsAcoustic telemetry has become an essential tool for studying activity patterns of animals in aquatic environments. Activity is typically recorded using transmitters with integrated sensors or dens...

Eneko Aspillaga presented their work on getting 1D movement data from detections on single receivers. For tags with suitable random, discrete emission intervals, this allows for movement analysis on sparse telemetry arrays (i.e. without 2D or 3D fine scale positioning).

I'll be presenting my work on underwater #acoustictelemetry positioning this week at the ETN Symposium (@aquatictracking.bsky.social) in Copenhagen; i.e. models for tracking fish. #FishSci Here's a link to my talk 👇 along with the code and data used to create the figures. zenodo.org/records/2330...

@gugunderwater.bsky.social

The talk is a quick summary of these recent positioning papers/preprints: - doi.org/10.64898/202... - doi.org/10.64898/202... - doi.org/10.1111/2041...

James A Campbell reposted

Chris Gug

It’s hard to imagine that this stunningly beautiful larval-stage cardinalfish will metamorphose into one of the most average, common, and most overlooked fish of Bali’s reefs. In other locations, this would be a once-in-a-lifetime prize find on any blackwater dive, but here in Bali, it’s common-ish

James A Campbell reposted

Lisa Messeri

@lmesseri.bsky.social

“Perhaps the most relevant issue is that by releasing this trove of material in this manner, the companies are in the process of destroying the ecosystem that made it possible for this work,” she said." To me, this is the crux. Science is a human, community endeavor. They are destroying science.

nytimes.com‘Breathtaking,’ ‘Devastating’: Mathematics Reels After New OpenAI Release (Gift Article)Hundreds of new A.I.-generated findings moved the frontiers of higher math in a single day — dispelling any doubt that the field is forever changed.

James A Campbell reposted

Carl T. Bergstrom

@carlbergstrom.com

Anthropic's new User Policy forbids you from engaging in "sustained and needless abusive or cruel behavior toward our models". It does not, however, explain what the fuck this could possibly mean.

anthropic.com2026 Usage Policy updateWe’re publishing a new version of our Usage Policy. In this post, we summarize the changes we’ve made.

James A Campbell reposted

Methods in Ecology and Evolution

@methodsinecoevol.bsky.social

The Data Management Better Science Guide has been updated! 🚨 A big thank you to Natalie Cooper and Robert Barber for editing the guide, and everyone who contributed to the writing! (1/3)

James A Campbell reposted

Zack Labe

@zacklabe.com

Quick oceans update: yah, sea surface temperatures remain in new territory this year. See more at zacklabe.com/climate-chan.... This data (extrapolar ocean) is provided by @copernicusecmwf.bsky.social ERA5. 🌊

James A Campbell reposted

Eamonn-Forde

@eamonn-forde.bsky.social

Oh, Viz.

nature.comCitizen science reveals temporally structured insect attraction and mitigation efficacy under artificial light at night - Communications BiologyCommunications Biology - Citizen science reveals temporally structured insect attraction and mitigation efficacy under artificial light at night

New #citizenscience #ALAN paper out from my labmates.

@pfrazee.com what's the status of editing posts on here? Is this something that's on the roadmap? My accumulation of spelling mistakes is starting to become painful on here 😬.

biorxiv.orgAbsolute measures of time-difference-of-arrival positioning error in underwater acoustic telemetry setupsThis brief communication presents two solutions for calculating absolute measures of error from time-difference-of-arrival (TDOA) positioning in underwater acoustic telemetry arrays. First, a Monte Ca...

Preprint: This short paper is my take on how to calculate/report absolute measures of time-difference-of-arrival positioning in #acoustictelemetry setups. Beyond reporting, these error measures can be passed to statespace models (like CTCRW) for very accurate post-processing estimates.

**Correction: "...time-difference-of-arrival positioning *error* in acoustic telemetry setups...."

Any one know what this is? For two recent pre-prints, I've gotten AI agents posing as "science journalists" emailing me for media requests. I'm wondering what the hustle is here.... Both times, the agent identified itself as "Conor Watkins" from "Primary News". #OpenScience #SciComm

Its obviously AI, as both pre-prints are on ridiculously niche topics that I struggle to get others in my field interested in 🤣 and I got this messages within a day after the pre-prints went up. Also, there is an AI company called Primary that seems to deal in AI generated news 🙄.

Here's a thread of all my paper announcements:

biorxiv.orgAn extended Kalman filter for large-volume path positioning of aquatic animals within acoustic telemetry arraysAcoustic telemetry is a core methodology for collecting fine-scale movement data for aquatic animals. When telemetry receivers are set up in closely spaced arrays with overlapping detection ranges, th...

An extended Kalman filter for large-volume path positioning of aquatic animals within acoustic telemetry arrays

James A Campbell@rtbecard.bsky.social

New preprint out: I use an extended Kalman filter for #acoustictelemetry positioning. It solves positions more-less instantly while applying a CTCRW movement model. It works great on datasets that don't have huge outliers (due to horizontal reflections).

Absolute measures of time-difference-of-arrival positioning error in underwater acoustic telemetry setups

James A Campbell@rtbecard.bsky.social

Here's a thread of all my paper announcements:

A population Monte Carlo model for underwater acoustic telemetry positioning in reflective environments

James A Campbell@rtbecard.bsky.social

New #FishSci #AcousticTelemetry positioning paper: PMC-TOA positioning. I used adaptive importance sampling & mixture distributions to position fish in environments prone to tag reflections. Mixed with post-processing, this gives great tracks! doi.org/10.1111/2041...

As usual, check the sup mat. Example R implementations of all the paper's math are shown there.

If interested, make sure to check sup mat. There are reproducible examples on how to apply the model to your own datasets.

James A Campbell reposted

KetAnthropic JoshAI

@ketanjoshi.co

3 Sept

fun fact! Musk's fossil fuelled data centres almost certainly emit more climate pollution than is saved by all Tesla vehicles ketanjoshi.co/2026/03/02/m...

Jesse Lee@jessecharleslee.bsky.social

As GOP postures against data centers, here’s what their moneyman Elon Musk just demanded at G20 on data centers: “It is pretty straightforward, you have to have an environment that is relatively free of regulation. New things must be default legal instead of default illegal.”

Has anyone been getting media requests from suspected AI agents for their papers? I published an *extremely* niche preprint... and my supervisor immediately got a media request email from a "journalist" from "Primary News". #SciComm #scisky

I suspect they are an AI agent scanning preprint repositories (I published on BioRxiv), then posing as journalists to make AI generated scientific news articles. The company "Primary" is an AI news organization founded by tech bro's as far as I can find.

I absolutely do not believe a human science journalist would be interested in my paper on: "Absolute measures of time-difference-of-arrival positioning error in underwater acoustic telemetry setups".🤣

"Proceeding of the Royal society" is now officially on my list of absolutely shit journals... They published the worst paper I have every peer reviewed (and the worst piece of scientific writing I have ever read, by far).

To sum it up... the peer preview process for this paper was a single anonymous peer reviewer who explicitly wrote in their review that they could not read/understand the research presented in the article. This is really not okay...

The authors used a fucking web article from pethelpful.com in their "literature review of national animal welfare regulations".

Here's what I wrote when I peer reviewed it in an earlier submission... My jaw is on the floor as to how this got accepted...

This fucking paper even made it to the journals cover!? Please stop allowing anonymous peer review... There needs to be some level of accountability on how absolute shit gets through the peer review system.

It was submitted to Nature sci. reports and rejected (rightly so), then accepted this year to Proc. Royal Soc. There was just one peer reviewer who opened with: "I apologise that I cannot review the main academic portion of this manuscript - the maths and physics is too far out of my field."

6 Aug

What is the preferred (not latex or cloud-based) document format for collaboratively writing manuscripts across linux/windows/macOS? Specifically for equation compatibility. I'm using onlyoffice to write docx right now... seems to work... but I'm not sure how much I can trust it 🤔

@allouryesterdays.bsky.social

6 Aug

Note: It unfortunately must be compatible with MSOffice.

James A Campbell reposted

All Our Yesterdays

3 Aug

Vol. 2, no. 5 of the CO2 Newsletter, June-August 1981 is now downloadable. Founded by American geologist William Barbat, each was 8 pages of excerpts from recent reports, editorials and deeply researched articles. All 18 issues are heart-breakers. allouryesterdays.info/co2-newslett... 1/9

22 July

Are there examples of concise statements that people put in acknowledgments sections to make clear to readers that absolutely no AI was used in any part of their paper? #Academiclife

22 July

I'm starting to get worried that younger students reading papers will just assume that *everything* was made with some degree with AI assistance... so I'd like to explicitly state in my works that I don't mess with that.

13 July

I wrote up my solution for figure scaling in rmarkdown. `fig.width` and `fig.height` set the output size and the new `scale` parameter scales the figure contents. Paste the code for the option hook in the first chunk, and the scale parameter will be available in all the following chunks. #rstats

rtbecard.gitlab.ioScaling figures in R MarkdownAn options hook for automatically scaling R Markdown figures.

13 July

See a detailed description here: rtbecard.gitlab.io/2026/07/13/R...