Results 71 to 80 of about 234,012 (292)

Generalized Mechanism Model for Ecosystem Hysteresis

Advanced Science, EarlyView.
A simplified model examines ecosystem transitions into alternative states after disturbances by leveraging positive and negative feedbacks. It identifies critical tipping points and quantifies hysteresis. Tests conducted on lakes, grasslands, and pitcher‐plant leaves align closely with empirical data and enable the prediction of recovery trajectories ...
Yanbin Hao, Xin Wang, Jie Liu, Mingzi Wu, Jianqing Du, Kai Xue, Xiaoning Song, Xiaoyong Cui, Tong Zhao, Yanfen Wang   +9 more
wiley   +1 more source

Heuristically Adaptive Diffusion‐Model Evolutionary Strategy

Advanced Science, EarlyView.
Building on the mathematical equivalence between diffusion models and evolutionary algorithms, researchers demonstrate unprecedented control over evolutionary optimization through conditional diffusion. By training diffusion models to associate parameters with specific traits, they can guide evolution toward solutions exhibiting desired behaviors ...
Benedikt Hartl, Yanbo Zhang, Hananel Hazan, Michael Levin   +3 more
wiley   +1 more source

The Value of Real and Financial Risk Management [PDF]

We characterize a firm as a nexus of activities and projects with their associated cashflows. Production and operations activities and real risk management activities distribute cashflows over states of nature and time periods, leading to a ...
M. Martin Boyer, Marcel Boyer, René Garcia   +2 more
core  

Consensus Formation and Change are Enhanced by Neutrality

Advanced Science, EarlyView.
Neutral agents are shown to enhance both the formation and overturning of consensus in collective decision‐making. A general mathematical model and experiments with locusts and humans reveal that neutrality enables robust consensus via simple interactions and accelerates consensus change by reducing effective population size.
Andrei Sontag, Janina A. Hoffmann, Tim Rogers, Christian A. Yates   +3 more
wiley   +1 more source

Coupled Above‐ and Belowground Ecosystem Stability Worldwide

Advanced Science, EarlyView.
Are the worlds above and below our feet in sync? This global exploration reveals an entangled fate between above‐ and belowground ecosystem stability. It identifies arid regions as hotspots for this coupling and highlights temperature stability as a vital safeguard for maintaining ecosystem balance across our warming planet.
Zexin Meng, Huiwen Li, Yiping Wu, Peter B. Reich, Nico Eisenhauer, Diego Abalos, Daniel Revillini, Shuguang Liu, Wende Yan, Ji Chen, Alexey Voinov, Zhifeng Yang, Ying‐Ping Wang, Fubo Zhao, Linjing Qiu, Jingfeng Xiao, Shantao An, Guopeng Liang, Manuel Delgado‐Baquerizo   +18 more
wiley   +1 more source

La création de la monnaie électronique : Analyse des conditions de création, des risques et responsabilités dans la zone CEMAC [PDF]

Revue Hybrides
La monnaie électronique connait une grande expansion dans la zone CEMAC. Les avantages de flexibilité de manipulation et de rapidité qu’offre la monnaie électronique, fait d’elle le choix de plusieurs consommateurs.
Jean Bruno Ceppa
doaj  

Evaluation des impacts environnementaux et des risques associés : Etude de cas sur le gisement de Fer de Bekisopa, Madagascar

Revue Congolaise des Sciences et Technologies
L'étude analyse les impacts environnementaux de l'exploitation du gisement de fer de Bekisopa, en utilisant une méthodologie précise. Elle identifie les impacts directs, en se concentrant sur les sphères physiques, atmosphérique et aquatique, notamment ...
D. L. Rakotonirina M., T. Razakamanana, D. Razafindrazanakolona A. D., E. Ramanampisoa V., Pius T. Mpiana, Jean Paul Koto-Te-Nyiwa Ngbolua, B. Robijaona Rahelivololoniaina   +6 more
doaj   +1 more source

DNA adducts in fish following an oil spill exposure [PDF]

, 2006
On 12 December 1999, one third of the load of the Erika tanker, amounting to about 10,000 t crude oil flowed into sea waters close to the French Atlantic Coast.
A. Amat, A. Pfohl-Leszkowicz, B French, B Kurelec, B Kurelec, BP Lyons, BP Lyons, C Genevois, CA Rice, D Petrapiana, DH Phillips, DH Phillips, E Aas, E Randerath, EJ Stein, F Telli-Karakok, F Vincent, FJ Van Schooten, G Ericson, G Ericson, G Ericson, JS Harvey, K Boillot, L Mazeas, LD Peters, M. Castegnaro, MC Poirier, MM Bradford, MS Myers, PAEL Schilderman, PC Baumann, R Amara, RA Lyons, T Burgeot, T. Burgeot, U Varanasi, WL Reichert   +36 more
core   +3 more sources

Macrophage TRIM21 Inhibition Ameliorates Murine Acute Pancreatitis via PHB2‐Mediated Mitochondrial Stabilization

Advanced Science, EarlyView.
Macrophage‐derived TRIM21 drives the progression of AP via ubiquitin‐proteasome‐mediated degradation of PHB2, leading to impaired PHB2‐mediated mitophagy. Therefore, accumulation of cytosolic mtDNA hyperactivates the cGAS‐STING signaling axis, thereby amplifying inflammatory cascades.
Yansong Xu, Yuansong Sun, Xin Zhou, Kai Song, Chunlin Yin, Zhaohua Wang, Fei Xie, He Li   +7 more
wiley   +1 more source

Visualizing and Quantifying Impact with Mechanochromic Sensing Paints Based on Self‐Assembled Polydiacetylene‐Silk Core‐Shell Vesicles

Advanced Science, EarlyView.
Tracking physical impacts is important in many fields. Self‐assembled microparticles made from polydiacetylene and silk fibroin that change color from blue to red when hit can provide an alternative approach to traditional mechanical transducers, quantitatively visualizing impact with responses ranging from <100 to 770 N.
Marco Lo Presti, Giulia Guidetti, Elisabetta Ruggeri, Terri Lyne Carrington, Fiorenzo G. Omenetto   +4 more
wiley   +1 more source