Results 71 to 80 of about 86,666 (234)

An Observational Estimate for the Mean Secular Evolution Rate in Spiral Galaxies

, 2010
We have observationally quantified the effect of gravitational torques on stars in disk galaxies due to the stellar distribution itself and explored whether these torques are efficient at transporting angular momentum within a Hubble Time.
Abazajian, Athanassoula, Barazza, Barden, Bell, Berentzen, Bertin, Bertin, Binney, Bosma, Bosma, Bournaud, Bournaud, Bruzual, Buta, Cayatte, Courteau, Courteau, Courteau, Curir, De Vaucouleurs, Debattista, Debattista, Dutton, Elmegreen, Foyle, Frei, Gnedin, Governato, Haan, Hans-Walter Rix, Hunt, Jarrett, Jogee, Kelly Foyle, Knapen, Knapen, Kormendy, Kranz, Lin, Lynden-Bell, Marinova, Merrifield, Navarro, Navarro, Navarro, Pasha, Pasha, Peng, Pérez, Rix, Roškar, Sancisi, Schneider, Sellwood, Sellwood, Sellwood, Sheth, Sofue, Somerville, Sparke, Springel, Springel, Stefano Zibetti, Tamburro, Thacker, Tully, Valenzuela, Van Der Kruit, Verdes-Montenegro, York, Zhang, Zhang, Zhang, Zibetti   +74 more
core   +1 more source

Transistor‐Level Activation Functions via Two‐Gate Designs: From Analog Sigmoid and Gaussian Control to Real‐Time Hardware Demonstrations

Advanced Materials, EarlyView.
Screen gate‐based transistors are presented, enabling tunable analog sigmoid and Gaussian activations. The SA‐transistor improves MRI classification accuracy, while the GA‐transistor supports precise Gaussian kernel tuning for forecasting. Both functions are implemented in a single device, offering compact, energy‐efficient analog AI processing ...
Junhyung Cho, Youngmin Han, Won Woo Lee, Youngwoo Yoo, Kannan Udaya Mohanan, Chang‐Hyun Kim, Junhwan Choi, Young‐Joon Kim, Wonjun Shin, Hocheon Yoo   +9 more
wiley   +1 more source

Radiation‐Resistant Aluminum Alloy for Space Missions in the Extreme Environment of the Solar System

Advanced Materials, EarlyView.
A novel ultrafine‐grained aluminum crossover alloy exhibits unprecedented radiation resistance and mechanical stability under extreme irradiation doses up to 100 dpa. The exceptional resilience arises from thermodynamically stable T‐phase precipitates, enabling lightweight structural materials for next‐generation spacecraft and extraterrestrial ...
Patrick D. Willenshofer, Matheus A. Tunes, Hi T. Vo, Lukas Stemper, Markus Alfreider, Oliver Renk, Graeme Greaves, Daniel Kiener, Peter J. Uggowitzer, Stefan Pogatscher   +9 more
wiley   +1 more source

The role of Hall diffusion in the magnetically threaded thin accretion discs

, 2011
We study role of the Hall diffusion in the magnetic star-disc interaction. In a simplified steady state configuration, the total torque is calculated in terms of the fastness parameter and a new term because of the Hall diffusion.
C.G. Campbell, D. Shalybkov, E. Liverts, F. Khajenabi, F.H. Shu, G. Rudiger, G.S. Bisnovatyi-Kogan, H.L. Dai, J. Frank, M. Shadmehri, M. Wardle, M.H. Erkut, M.M. Romanova, Mohsen Shadmehri, N.I. Shakura, O.M. Matthews, P. Ghosh, R.V.E. Lovelace, R.V.E. Lovelace, S.A. Balbus, S.A. Balbus, W. Kluzniac, Y.M. Shtemler, Y.M. Wang   +23 more
core   +1 more source

Atomistic Mechanisms Triggered by Joule Heating Effects in Metallic Cu‐Bi Nanowires for Spintronics

Advanced Materials, EarlyView.
Bi doped metallic Cu nanowires are promising for spintronics thanks to the stabilization of a giant spin Hall effect. However, heat resulting from current injection forces Bi to leave solution, forcing segregation into monoatomic decorations which evolve into coherent crystalline aggregates.
Alejandra Guedeja‐Marrón, Juan Ignacio Beltrán, Matilde Saura‐Múzquiz, Paolo Perna, M. Carmen Muñoz, Lucas Pérez, Maria Varela   +6 more
wiley   +1 more source

Towards a mesoscopic model of water-like fluids with hydrodynamic interactions

, 2011
We present a mesoscopic lattice model for non-ideal fluid flows with directional interactions, mimicking the effects of hydrogen-bonds in water. The model supports a rich and complex structural dynamics of the orientational order parameter, and exhibits ...
Irene Mazzitelli, Maddalena Venturoli, Sauro Succi, Simone Melchionna, Succi S.   +4 more
core   +1 more source

Solar Splash Senior Design Project [PDF]

, 2020
Indiana University Purdue University IndianapolisThe Solar Splash senior project is the first attempt at creating an entirely solar propelled watercraft.
Almogayer, Khaled, Binder, Paul, Sauer, Matthew   +2 more
core  

Ammonium Salts as Curing Agents to Obtain Ionic Epoxy Resins With a Thermoplastic‐to‐Thermoset Transition

Advanced Materials, EarlyView.
Ionic epoxy networks are prepared using ammonium salts as hardeners, leading to a two‐stage curing process with a thermoplastic‐like intermediate. This uncommon behavior enables extrusion and fabrication of thermoplastic prepregs that can be cured into thermoset composites.
Izabela Kurowska, Leire Unanue, Itxaso Calafel, Dorleta Otaegui, Jorge L. Olmedo‐Martínez, Lourdes Irusta, Daniel Vinagre, Nora Aranburu, Nerea Casado, Ibon Odriozola, David Mecerreyes   +10 more
wiley   +1 more source

Optimal Ignition Timing Prediction Based on Premixed Ratio and Combustion Duration Using the Multiple Vibe 2-Zone Combustion Model

Journal of Engineering
The depletion of fossil fuel supplies and the harmful environmental effects of combustion have emerged as significant issues. One viable approach to address these challenges is optimizing fuel injection timing to improve diesel engine performance.
Van-Trang Nguyen, Son Hoang Do, Minh Quang Pham, Wei-Cheng Wang, Thong Duc Hong   +4 more
doaj   +1 more source

Functional Metal Complexes for Solar–Light‐Driven Energy Conversion

Advanced Materials, EarlyView.
This review provides an exhaustive summary of the recent advancements of functional metal complexes in solar‐to‐electrical, ‐chemical, and ‐thermal energy conversion, comprising material categories, design strategies, underlying principles of operation, and identified improvement of performances.
Yanyan Qin, Dou Luo, Miao Zhang, Wai‐Yeung Wong   +3 more
wiley   +1 more source