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Valentin Ștefan

@veralis.bsky.social

Computer vision for pollinators 🌻🐝 & nature. Sometimes, for me, some cats make more sense than some people 🐾 💻 github.com/valentinitnelav 📍 @idiv-research.bsky.social 🔗 linkedin.com/in/valentin-stefan/ 🔗 scholar.google.com/citations?user=8HlgXLYAAAAJ&hl=en

6 Posts60 Follower85 Folgt
IPBES@ipbes.net · 6mo ago

The IPBES Business and Biodiversity Assessment Report Summary for Policymakers is available now! 🏡 Explore this first of it’s kind report highlighting methods and actions to measure and respond to business impacts and dependencies on nature.🌍 🧪 https://ipbes.canto.de/b/JTB1U

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Adam Grant@adamgrant.bsky.social · 8mo ago

Too many mediocre men talk over capable women. Study of problem-solving teams: Men dominate the conversation, taking 50% more turns and saying 69% more than women. Men with low skill speak more than women with high skill. It's long past time to value competence over confidence.

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Will Glenny@willglennyphbee.bsky.social · 9mo ago

Turns out, a lot of the plants we use for bee habit enhancement are already common and mostly support those darn common generalists! Thanks @joseblanuza.bsky.social for the help getting this across the line besjournals.onlinelibrary.wiley.com/doi/10.1111/...

Flowers for habitat enhancement primarily benefit common insect pollinators across temperate grasslands

Flowers that are attractive and occupy a complementary position in interaction space could be prioritized in flower mixes to recover rare and specialized pollinators. By defining the ecological roles...

besjournals.onlinelibrary.wiley.com

Valentin Ștefan@veralis.bsky.social · last yr.

Our latest research explores how YOLO object detectors, trained on citizen science images, perform on unseen time-lapse images of pollinators captured with a fixed smartphone setup. While successful for larger pollinators, detecting smaller or blurrier flower visitors remains a challenge.

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Adam Bonica@adambonica.bsky.social · last yr.

The DOGE firings have nothing to do with “efficiency” or “cutting waste.” They’re a direct push to weaken federal agencies perceived as liberal. This was evident from the start, and now the data confirms it: targeted agencies overwhelmingly those seen as more left-leaning. 🧵⬇️

Scatterplot titled “Empirical Evidence of Ideological Targeting in Federal Layoffs: Agencies seen as liberal are significantly more likely to face DOGE layoffs.” • The x-axis represents Perceived Ideological Leaning of federal agencies, ranging from -2 (Most Liberal) to +2 (Most Conservative), based on survey responses from over 1,500 federal executives. • The y-axis shows Agency Size (Number of Staff) on a logarithmic scale from 1,000 to 1,000,000. Each point represents a federal agency: • Red dots indicate agencies that experienced DOGE layoffs. • Gray dots indicate agencies with no layoffs. Key Observations: • Liberal-leaning agencies (left side of the plot) are disproportionately represented among red dots, indicating higher layoff rates. • Notable targeted agencies include: • HHS (Health & Human Services) • EPA (Environmental Protection Agency) • NIH (National Institutes of Health) • CFPB (Consumer Financial Protection Bureau) • Dept. of Education • USAID (U.S. Agency for International Development) • The National Nuclear Security Administration (DOE), despite its conservative leaning (+1 on the scale), is an exception among targeted agencies. • A notable outlier: the Department of Veterans Affairs (moderately conservative) also faced layoffs despite its size. Takeaway: The figure visually demonstrates that DOGE layoffs disproportionately targeted liberal-leaning agencies, supporting claims of ideological bias. The pattern reveals that layoffs were not driven by agency size or budget alone but were strongly associated with perceived ideology. Source: Richardson, Clinton, & Lewis (2018). Elite Perceptions of Agency Ideology and Workforce Skill. The Journal of Politics, 80(1).
iBartomeus@ibartomeus.bsky.social · 2y ago

[new paper] EuPPollNet: A European Database of Plant-Pollinator Networks onlinelibrary.wiley.com/doi/10.1111/... Another wonderful paper of @joseblanuza.bsky.social making open more than >1500 networks and looking at their properties. Come for the data, stay for the cool figures!

EuPPollNet: A European Database of Plant‐Pollinator Networks

Motivation Pollinators play a crucial role in maintaining Earth's terrestrial biodiversity. However, rapid human-induced environmental changes are compromising the long-term persistence of plant-pol...

onlinelibrary.wiley.com