BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//A3veen.nl - ECPv6.17.2//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://www.a3veen.nl
X-WR-CALDESC:Evenementen voor A3veen.nl
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Amsterdam
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20251026T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20260329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20261025T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20270328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20271031T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260511
DTEND;VALUE=DATE:20260512
DTSTAMP:20260607T141027Z
CREATED:20260511T124630Z
LAST-MODIFIED:20260607T141027Z
UID:141233-1778457600-1778543999@www.a3veen.nl
SUMMARY:Growth and formaldehyde degradation of photoheterotrophic Methylobacterium within radiation fogs - publication
DESCRIPTION:The report ‘Growth and formaldehyde degradation of photoheterotrophic Methylobacterium within radiation fogs‘ subscibes fog and an incredible discovery that it’s essentially a complex biosphere. \nThe atmosphere contains thousands to millions of bacterial cells per cubic meter. However\, it remains unclear if microbes are at all active or growing in situ or whether they are merely being transported in an inactive state. Based on the analyses of 32 overland radiation fog events over a 2-year period\, we show that fog waters\, with bacterial concentrations similar to those in continental or marine bodies of water\, contain microbiomes well differentiated in composition from those in the dry aerosol microbiomes that occur locally before\, during\, or after fog events. They are consistently and strongly enriched in photoheterotrophic Methylobacterium species\, suggesting that fog populations may be metabolizing volatile C1 compounds in situ\, although phototrophy seems much less important. Indeed\, metabolically active bacteria in the fog\, and representative isolates of the main field populations\, can degrade formaldehyde at unprecedently high rates; most of this activity seems to play a detoxification role. The increase in bacterial aerobiome counts upon intervening fog events\, the dependence of microbial concentration on ambient temperature\, the increases in cell size and frequency of dividing cells in fog water with respect to cells in interstitial aerosols of fogs\, in addition to their metabolic capacity\, all suggest that the fog water microbiome is actually growing. Consequently\, droplets of atmospheric water should be considered a potential aquatic microhabitat. Our results highlight the fog microbiome’s role in atmospheric chemistry and have implications for fog harvesting as a source of fresh water for human use. \nLinks:\nTiny Bacteria in the Fog May Be Helping Clean the Air
URL:https://www.a3veen.nl/event/growth-and-formaldehyde-degradation-of-photoheterotrophic-methylobacterium-within-radiation-fogs-publication/
CATEGORIES:Bibliotheek,Biologie,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260519
DTEND;VALUE=DATE:20260520
DTSTAMP:20260520T162153Z
CREATED:20260519T160518Z
LAST-MODIFIED:20260520T162153Z
UID:140692-1779148800-1779235199@www.a3veen.nl
SUMMARY:Nieuw evenwicht in het energiesysteem : Kritieke materiaalvraag voor een klimaatneutraal Nederland in 2040 - publicatie
DESCRIPTION:Schoner en onafhankelijker energiesysteem binnen planetaire grenzen is haalbaar met strategisch beleid. \nMet strategische beleidskeuzes kan Nederland haar energie-onafhankelijkheid vergroten en tegelijkertijd het klimaat en cruciale ecosystemen beschermen. Dat blijkt uit het onderzoek ‘Nieuw evenwicht in het energiesysteem‘ van Copper8\, Quintel en Polaris Sustainability in opdracht van Greenpeace Nederland. Het onderzoek laat zien dat een explosieve groei van transitiemetalen\, voor onder andere zonnepanelen\, windturbines en batterijen\, geen gegeven is\, maar een keuze. Ten opzichte van de huidige projecties kan de vraag naar transitiemetalen in de periode tot en met 2050 met 42 – 49% worden verlaagd door energiebesparing en innovatie. Mijnbouw in kwetsbare ecosystemen\, waaronder de diepzee\, is dan niet nodig. \nLinks:\nNederlandse energietransitie mogelijk met veel minder kritieke mineralen en metalen
URL:https://www.a3veen.nl/event/nieuw-evenwicht-in-het-energiesysteem-kritieke-materiaalvraag-voor-een-klimaatneutraal-nederland-in-2040-publicatie/
CATEGORIES:Bibliotheek,Energie,kennis,Klimaat,Milieu,Onderzoek
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260713
DTEND;VALUE=DATE:20260714
DTSTAMP:20260721T112448Z
CREATED:20260713T011157Z
LAST-MODIFIED:20260721T112448Z
UID:142810-1783900800-1783987199@www.a3veen.nl
SUMMARY:Citizen science platforms must mitigate against the threat of generative AI - publication
DESCRIPTION:In the commentary ‘Citizen science platforms must mitigate against the threat of generative AI’ in the science journal Nature\, researchers warned that hundreds of fake images have already been discovered on popular databases for recording species\, they said that the true scale of the issue is unknown – as many could go undetected – and could contaminate records collected by the public. \nLinks:\nAI-altered images on birdwatching forums putting research at risk
URL:https://www.a3veen.nl/event/citizen-science-platforms-must-mitigate-against-the-threat-of-generative-ai-publication/
CATEGORIES:Bibliotheek,Burgerwetenschap,kennis
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260721
DTEND;VALUE=DATE:20260722
DTSTAMP:20260728T080328Z
CREATED:20260721T075123Z
LAST-MODIFIED:20260728T080328Z
UID:142998-1784592000-1784678399@www.a3veen.nl
SUMMARY:The State of Food Security and Nutrition in the World 2026
DESCRIPTION:Global hunger declined for a third consecutive year in 2025\, demonstrating that progress is possible. However\, the improvements remain fragile\, unevenly distributed and insufficient to achieve the Sustainable Development Goals by 2030\, according to The State of Food Security and Nutrition in the World 2026 (SOFI 2026) report\, released on Tuesday by five United Nations specialized agencies. \nThe report estimates that 7.8 percent of the global population faced hunger in 2025\, down from 8.1 percent in 2024 and 8.6 percent in 2022\, confirming a sustained\, albeit slow\, improvement. This means that around 645 million people were affected by hunger in 2025\, representing a reduction of nearly 14 million compared to 2024 and 43 million compared to 2022. Despite global progress\, recovery remains uneven across regions. Asia\, together with Latin America and the Caribbean\, has recorded steady improvements in recent years. In contrast\, Africa is now home to approximately 309 million hungry people\, compared with 292 million in Asia. Although Africa’s previously rising trend is beginning to stabilize\, with the share of its population facing hunger decreasing from 20.3 percent in 2024 to 20.0 percent in 2025\, the continent now has the highest number of hungry people in absolute terms amid a rapidly growing population. Broader measures of food access tell a similar story. In 2025\, an estimated 25.8 percent of the global population (around 2.1 billion people) experienced moderate or severe food insecurity\, meaning they were at times forced to compromise on the quality or quantity of the food they ate. This is down from 27.1 percent in 2024 and 28.7 percent in 2020 – equivalent to nearly 86 million fewer people than in 2024 and 135 million fewer than in 2020\, though still above pre-pandemic levels. Regional disparities remain stark. More than half of Africa’s population (56.6 percent) faced moderate or severe food insecurity in 2025\, compared to 20.3 percent in Asia\, 22.9 percent in Latin America and the Caribbean\, and 8.7 percent in Northern America and Europe. Food insecurity also continues to be more prevalent in rural areas than in peri-urban and urban areas\, while women remain disproportionately affected\, although the gender gap narrowed slightly in 2025. \nLinks:\nThe State of Food Security and Nutrition in the World 2026
URL:https://www.a3veen.nl/event/the-state-of-food-security-and-nutrition-in-the-world-2026/
CATEGORIES:Bibliotheek,Culinair,kennis,Maatschappij,UN,Voedselproductie
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260730
DTEND;VALUE=DATE:20260731
DTSTAMP:20260731T093614Z
CREATED:20260730T093352Z
LAST-MODIFIED:20260731T093614Z
UID:143137-1785369600-1785455999@www.a3veen.nl
SUMMARY:Warm\, droog en winderig: steeds vaker 'vuurweer' in Zuid-Europa / Major intensification of fire weather across southern Europe in recent decades - publication
DESCRIPTION:Warm\, droog\, lage luchtvochtigheid en winderig: het zijn omstandigheden die gunstig zijn voor natuurbranden\, oftewel ‘vuurweer’\, sinds begin jaren 1980 is het aantal dagen met zulk weer flink toegenomen in Zuid-Europa\, schrijven wetenschappers in het artikel ‘Major intensification of fire weather across southern Europe in recent decades‘ in het vakblad Scientific Reports. \nHet onderzoek beslaat de periode van 1981 tot en met 2025. Opvallend genoeg nam het aantal branden in die periode juist af. Net als het oppervlak verbrande natuur in Zuid-Europa\, al schommelde dat flink van jaar tot jaar. Het onderzoek gaat dus niet over de huidige branden in Frankrijk en Spanje. Menselijk gedrag veroorzaakt de meeste ontstekingen; als mensen minder peuken achteloos weggooien of minder brandstichten\, leidt dat tot minder branden. Maar er zijn nog meer zaken die invloed hebben. Denk aan het landschap en hoeveel brandstof dat bevat. Zo woeden de branden bij Bordeaux in een gebied met rijen geplante\, brandbare zeedennen. \nLinks:\nWarm\, droog en winderig: steeds vaker ‘vuurweer’ in Zuid-Europa
URL:https://www.a3veen.nl/event/warm-droog-en-winderig-steeds-vaker-vuurweer-in-zuid-europa-major-intensification-of-fire-weather-across-southern-europe-in-recent-decades-publication/
CATEGORIES:Bibliotheek,kennis,Klimaat
END:VEVENT
END:VCALENDAR