Results 41 to 50 of about 107,080 (284)

Uniform isochronous cubic and quartic centers: Revisited [PDF]

, 2017
In this paper we completed the classification of the phase portraits in the Poincaré disc of uniform isochronous cubic and quartic centers previously studied by several authors.
Artés Ferragud, Joan Carles, Itikawa, Jackson, Llibre, Jaume   +2 more
core   +2 more sources

Prenucleation Species Dictate Foreign Ion Incorporation in the Biomineral Precursor Amorphous Calcium Carbonate

Advanced Functional Materials, EarlyView.
ACC forms via aggregating prenucleation clusters that gatekeep its chemical composition. Ion identity steers the path: Ba and Sr substitute Ca in clusters, thereby inhibiting nucleation, with a dose‐dependent switch of Sr to induction. Mg partitions into Mg‐rich and Mg‐poor clusters; the latter form ACC, expelling Mg.
Qianyu Zhao, Patrick Duchstein, Benedikt Demmert, Thi Q. Nhi Dao, Krishnaveni Anjala, Evelyn Gruber, Franziska Gröhn, Dirk Zahn, Dorrit E. Jacob, Stephan E. Wolf   +9 more
wiley   +1 more source

Global phase portraits of a predator–prey system

Electronic Journal of Qualitative Theory of Differential Equations, 2022
We classify the global dynamics of a family of Kolmogorov systems depending on three parameters which has ecological meaning as it modelizes a predator–prey system.
Érika Diz-Pita, Jaume Llibre, M. Victoria Otero-Espinar   +2 more
doaj   +1 more source

Magnetic Oscillations in Dense Cold Quark Matter with Four-Fermion Interactions [PDF]

, 1999
The phase structures of Nambu-Jona-Lasinio models with one or two flavours have been investigated at non-zero values of $\mu$ and $H$, where $H$ is an external magnetic field and $\mu$ is the chemical potential.
A. S. Vshivtsev, A.D. Balaev, A.P. Prudnikov, A.S. Vshivtsev, A.S. Vshivtsev, A.S. Vshivtsev, A.S. Vshivtsev, A.S. Vshivtsev, A.S. Vshivtsev, A.Yu. Babansky, B. Geyer, B.A. Arbuzov, Chr.V. Christov, D. Bailin, D. Ebert, D. Ebert, D. Ebert, D. Ebert, D. Ebert, D. Ebert, D. Ebert, D. Ebert, D. Ebert, D. Ebert, D. Persson, D. Shoenberg, D.K. Kim, D.M. Gitman, E. Elizalde, E. Elizalde, E.J. Ferrer, H. Bateman, H. Forkel, H. Forkel, I.A. Shovkovy, I.A. Shushpanov, J. Berges, J. Fuchs, J. Schwinger, J.O. Andersen, K. G. Klimenko, K.G. Klimenko, K.G. Klimenko, K.G. Klimenko, L. Dolan, M. A. Vdovichenko, M. Alford, M. Iwasaki, M.K. Volkov, M.R. Brown, P. Elmfors, P. Elmfors, R. Rapp, S. Chakrabarty, S. Kawati, S. Schramm, S.P. Klevansky, S.P. Klevansky, T. Inagaki, T. Inagaki, T. Inagaki, T.M. Schwarz, V. Bernard, V.Ch. Zhukovsky, V.Ch. Zhukovsky, V.G. Vaks, V.G. Vaks, V.P. Gusynin, V.P. Gusynin, V.R. Khalilov, W. Dittrich, W.J. de Haas, Y. Nambu, Y. Nambu   +73 more
core   +3 more sources

Design Strategies and Emerging Applications of High‐Performance Flexible Piezoresistive Pressure Sensors

Advanced Functional Materials, EarlyView.
Flexible piezoresistive pressure sensors underpin wearable and soft electronics. This review links sensing physics, including contact resistance modulation, quantum tunneling and percolation, to unified materials/structure design. We highlight composite and graded architectures, interfacial/porous engineering, and microstructured 3D conductive networks
Feng Luo, Artur Ciesielski, Paolo Samorì   +2 more
wiley   +1 more source

Phase portraits of separable Hamiltonian systems [PDF]

Nonlinear Analysis: Theory, Methods & Applications, 2011
We study some generalizations of potential Hamiltonian systems $(H(x, y) = y^2 + F(x))$ with one degree of freedom. In particular, we are interested in Hamiltonian systems with Hamiltonian functions of type $H(x, y) = F(x) + G(y)$ arising in applied mechanical problems. We present an algorithm to plot the phase portrait (include the
Guillamon Grabolosa, Antoni, Pantazi, Chara   +1 more
openaire   +7 more sources

Small Extracellular Vesicles from Neural Cells: Physiological and Pathological Roles, and Potential in Neurodegenerative Therapy

Advanced Healthcare Materials, EarlyView.
Neural cell–derived small extracellular vesicles (sEVs) are emerging as pivotal mediators in neurodegenerative diseases, exerting both pathogenic and therapeutic functions. This review synthesizes current evidence on how sEVs from distinct neural cell types regulate neurodegeneration, neuroprotection, biomarker discovery, and targeted drug delivery ...
Muhammad Waqas Salim, Wei Zhang, Lyndsey Collins‐Praino, Yuling Wang, Andrew Care   +4 more
wiley   +1 more source

Stokes tomography of radio pulsar magnetospheres. II. Millisecond pulsars

, 2011
The radio polarization characteristics of millisecond pulsars (MSPs) differ significantly from those of non-recycled pulsars. In particular, the position angle (PA) swings of many MSPs deviate from the S-shape predicted by the rotating vector model, even
A. Melatos, Arons, Bell, Blaskiewicz, C. T. Y. Chung, Cheng, Cheng, Chung, Cordes, Dyks, Dyks, Gangadhara, Hibschman, Johnston, Karastergiou, Kaspi, Knight, Lamb, Long, Lorimer, Lyne, Manchester, Manchester, Melatos, Melatos, Navarro, Ord, Payne, Petrova, Radhakrishnan, Ruderman, Ruderman, Shakura, Spitkovsky, Srinivasan, Stairs, Watters, Zhang   +37 more
core   +1 more source

Purpose‐Adaptable Reinforced 3D Hyaluronic‐Acid Based Platform to Study Pathomechanisms of the Central Nervous System

Advanced Healthcare Materials, EarlyView.
Platform system to create biofabricated 3D spinal cord tissue models: Combining high resolution PCL fiber placement, a customized, hyaluronic acid‐based hydrogel, two cell types (spinal cord neurons and astrocytes) together with three distinct laminin isoforms allow the formation of functional cell–cell network interactions.
Nicoletta Murenu, Esra Tuerker, Anna‐Lena Wiessler, Jessica Faber, Ievgenii Liashenko, Jeanette Weigelt, Jörg Tessmar, Paul D. Dalton, Sibylle Jablonka, Mateo S. Andrade Mier, Carmen Villmann, Silvia Budday, Natascha Schaefer   +12 more
wiley   +1 more source

New modified Chua’s circuit and experiment

Tongxin xuebao, 2006
A new modified Chua’s circuit was presented and its chaotic properties were studied in theoretic. The condi-tion of occurring Hopf bifurcation was derived and some phase portraits were given.
WANG Fa-qiang, LIU Chong-xin
doaj   +2 more sources