Results 61 to 70 of about 44,189 (275)

Computer simulations of history of life: speciation, emergence of complex species from simpler organisms, and extinctions

, 2003
We propose a generic model of eco-systems, with a {\it hierarchical} food web structure. In our computer simulations we let the eco-system evolve continuously for so long that that we can monitor extinctions as well as speciations over geological time ...
Ackermann, Bak, Bak, Caldarelli, Carroll, Chowdhury, Chowdhury, Cohen, Cohen, Cohen, Debashish Chowdhury, di Collobiano, Dieckmann, Dietrich Stauffer, Doebeli, Drossel, Drossel, Drossel, Fussmann, Ghalambor, Goel, Hall, Hofbauer, Kauffman, Khibnik, Maynard-Smith, Maynard-Smith, Mayr, Mayr, Murray, Newman, Orr, Paczuski, Pimm, Post, Quince, Solé, Solé, Solé, Stauffer, Thompson, Thompson, Williams, Łaszkiewicz   +43 more
core   +1 more source

Evolutionary ecology in-silico:evolving foodwebs, migrating population and speciation [PDF]

, 2004
We have generalized our ``unified'' model of evolutionary ecology by taking into account the possible movements of the organisms from one ``patch'' to another within the same eco-system.
Ambarish Kunwar, Antal, Antal, Boccara, Carroll, Chowdhury, Chowdhury, Chowdhury, Cohen, Coppex, Czaran, Debashish Chowdhury, di Collobiano, Diekmann, Dietrich Stauffer, Drossel, Drossel, Droz, Droz, Frachebourg, Fussmann, Gavrilets, Hall, Johst, Lipowski, Makowiec, Mayr, Moss de Oliveira, Newwman, Pe¸kalski, Pimm, Rikvold, Satulovsky, Shnerb, Stauffer, Stockwell, Tainaka, Thompson, Thompson, Thompson, Turchin, Yoshida   +41 more
core   +1 more source

PREY-PREDATOR MODELING OF CO2 ATMOSPHERIC CONCENTRATION

, 2021
Key words:Prey Predator model, Photosynthesis rate, CO2 ...
Trevisan, Luis Augusto, Luz, Fabiano Meira de Moura   +1 more
openaire   +2 more sources

Laser‐Microscribed Glass Enables Surface‐Microfluidics‐Facilitated, Affordable, Rapid Cancer Diagnosis

Advanced Functional Materials, EarlyView.
A transparent, laser‐microscribed glass platform enables cancer diagnosis within 1 h—much faster than histology, which takes days, and free from the chemical or contrast risks of MRI or CT scans. The antibody‐functionalized rough glass surface captures viable cancer cells directly from suspension, allowing instant optical readout and offering a rapid ...
Anish Pal, Snehasis Mishra, Arani Mukhopadhyay, Ilias Papailias, Atique U. Ahmed, Constantine M. Megaridis   +5 more
wiley   +1 more source

A nutrient-prey-predator model: Stability and bifurcations

Discrete & Continuous Dynamical Systems - S, 2020
In this paper we consider a model of a nutrient-prey-predator system in a chemostat with general functional responses, using the input concentration of nutrient as the bifurcation parameter. We study the changes in the existence of isolated equilibria and in their stability, as well as the global dynamics, as the nutrient concentration varies.
Ballyk, Mary, Staffeldt, Ross, Jawarneh, Ibrahim   +2 more
openaire   +4 more sources

Three‐Dimensional Hierarchical Nanowire‐Networks with Deep‐Focus Tolerance and Adhesion Robustness for Harsh‐Environment SERS Sensing

Advanced Functional Materials, EarlyView.
A 3D nanowire‐network SERS substrate with robust adhesion is developed, featuring pronounced z‐direction optical activity, ultralow detection limit (1.5 × 10−13 M), and excellent signal uniformity (RSD < 10%). Enabled by enhanced light scattering, increased optical density of states, and structural reinforcement, the substrate demonstrates stable, high‐
Jinglai Duan, Wentao Wang, Xiu Liang, Yongliang Zhang, Jie Liu, Yu Bai, Dangyuan Lei   +6 more
wiley   +1 more source

Spatio-temporal dynamics of a predator–prey system with variable carrying capacity and Cosner response function

Franklin Open
The environmental carrying capacity plays a major role in population dynamics and is highly unpredictable in predator–prey relationships. In this study, we examine a predator–prey model with logistic growth rate and variable carrying capacity of prey ...
Sasanka Shekhar Maity, Subarna Roy, Pankaj Kumar Tiwari   +2 more
doaj   +1 more source

Periodicity of mass extinctions without an extraterrestrial cause

, 2005
We study a lattice model of a multi-species prey-predator system. Numerical results show that for a small mutation rate the model develops irregular long-period oscillatory behavior with sizeable changes in a number of species.
B. Drossel, C. Quince, J. D. Murray, J. Hofbauer, M. E. J. Newman, S. M. Stanley   +5 more
core   +1 more source

Evaluation of the Dual Impact of Nanotechnologies on Health and Environment Through Alternative Bridging Models

Advanced Healthcare Materials, EarlyView.
This review explores how alternative invertebrate and small‐vertebrate models advance the evaluation of nanomaterials across medicine and environmental science. By bridging cellular and organismal levels, these models enable integrated assessment of toxicity, biodistribution, and therapeutic performance.
Marie Celine Lefevre, Margherita Bernardeschi, Matteo Battaglini, Gianni Ciofani   +3 more
wiley   +1 more source

Permanence of Periodic Predator-Prey System with General Nonlinear Functional Response and Stage Structure for Both Predator and Prey

Abstract and Applied Analysis, 2009
We study the permanence of periodic predator-prey system with general nonlinear functional responses and stage structure for both predator and prey and obtain that the predator and the prey species are permanent.
Xuming Huang, Xiangzeng Kong, Wensheng Yang   +2 more
doaj   +1 more source