Results 31 to 40 of about 187,399 (250)

Multiphoton‐Printed Microrobotic Arrays Powered by Discrete, Monolithically Integrated Hydrogel Actuators

Advanced Robotics Research, EarlyView.
Functional surfaces are investigated as a foundation for reconfigurable microscale systems with sensing and actuation capabilities. Advances in additive manufacturing enable our development of planar arrays of hybrid‐material, compliant microdevices that convert environmental stimuli into programmed motion and visual responses.
Sandra Edward, Eric Nieto Gonzalez, Michael Gallegos, Thomas Golecki, Bryan Kaehr, Holly M. Golecki   +5 more
wiley   +1 more source

Hierarchical Artificial Muscle with Nonlinear Elasticity for Antagonistic and Cyclic Robotics

Advanced Science, EarlyView.
We construct hierarchical muscles by plying nylon fibers around a heating wire. The hierarchical muscle shows a J‐shaped passive curve, which shows benefit in antagonistic muscle pair and work accumulation mechanism. We also develop a computational, first‐principle model to understand the physics of both active actuation stroke and passive J‐curve ...
Samuel Tsai, Liuyang Cheng, Ali Albazroun, Qiong Wang, Jeongmin Kim, Arman Tekinalp, Soonwook Kim, Charlie Simcox, Ryne Downing, Vagish Sivaramakrishnan, Grace Carsello, Miles Bimrose, Wonsik Eom, William P. King, Mattia Gazzola, Sameh Tawfick   +15 more
wiley   +1 more source

Una reflexión sobre el modelo urbano: ciudad dispersa-ciudad compacta [PDF]

, 2009
Peer ...
Chavoya Gama, Jorge Ignacio, García Galván, Joel, Rendón Contreras, Héctor Javier   +2 more
core   +1 more source

Spectroscopic Evidence of Edge‐Localized States in an Antiferromagnet Topological Insulator NdBi

Advanced Science, EarlyView.
Using spin‐polarized scanning tunneling microscopy (STM) in conjunction with quasiparticle interference, we successfully identify distinct signatures of the ferromagnetic and antiferromagnetic terminations in NdBi, a rare‐earth monopnictide exhibiting non‐trivial topology and magnetism. We demonstrate that step edges on ferromagnetic surfaces host well‐
Avior Almoalem, Rebecca Chan, Brinda Kuthanazhi, Juan Schmidt, Jose A. Moreno, Hermann Suderow, Paul Canfield, Taylor L. Hughes, Vidya Madhavan   +8 more
wiley   +1 more source

Repensar la ciudad: la dimensión ontológica de lo urbano

Liminar: Estudios Sociales y Humanísticos, 2006
Los cambios recientes en las ciudades generan numerosas interpretaciones muy diferentes entre sí. Pocos autores, sin embargo, enfrentan una pregunta fundamental: ¿estamos todavía frente a lo que tradicionalmente se ha llamado “ciudad”?
Daniel Hiernaux
doaj   +3 more sources

Analysis of Nematode Ventral Nerve Cords Suggests Multiple Instances of Evolutionary Changes to Neuron Number. [PDF]

Evol Dev
“Analysis of Nematode Ventral Nerve Cords Suggests Multiple Instances of Evolutionary Addition and Loss of Neurons” Han et al. DAPI staining of Xiphinema sp. (Clade 2) highlighting the neuronal‐like nuclei within the ventral nerve cord. ABSTRACT Despite their diversity in habitats, nematodes are often considered to have a highly conserved neuroanatomy.
Han J, Ficca A, Lanzatella M, Leang K, Barnum M, Boudreaux JCT, Schroeder NE.   +6 more
europepmc   +2 more sources

La gentrificación como una estrategia global [PDF]

, 2018
La "gentrificación como estrategia urbana global" fue la expresión que Neil Smith utilizó para describir la relación entre la globalización y el urbanismo neoliberal, caracterizada por la generalización geográfica de la gentrificación y su conexión a los
Albet i Mas, Abel, Benach, Núria
core   +1 more source

Effects of Urban Expansion in the Choice of Commuting Modes by the Population of Metropolitan Areas [PDF]

, 2018
En la actualidad, la expansión urbana es uno de los mayores problemas que deben resolver las ciudades. El fenómeno de crecimiento urbanístico conlleva una transformación espacial que ha ido acompañada por efectos negativos como el uso extensivo del ...
Braçe, Olta
core   +3 more sources

Enzymatic Basis for the Oxidative Branch of Aromatic Amino Acid Fermentation Leading to p‐cresol Formation

Advanced Science, EarlyView.
In anaerobic bacteria, tyrosine serves as an electron donor in the oxidative Stickland fermentation branch, generating p‐hydroxyphenylacetate, ATP and reduced ferredoxin for decarboxylation into p‐cresol. ABSTRACT The phenolic metabolite p‐cresol is a byproduct of tyrosine fermentation by certain strictly anaerobic bacteria, including the human gut ...
Li Jiang, Yifeng Wei, Xumei Liu, Dazhi Liu, Zhenyu Liu, Yang Tong, Jinyu Yin, Ankanahalli N. Nanjaraj Urs, Meining Xing, Mark A. Harrison, Chuyuan Zhang, Sheng Yang, Yunzi Luo, Ee Lui Ang, Huimin Zhao, Yan Zhang   +15 more
wiley   +1 more source

Material Strategies for Stimulation and Recording in Neural Biocomputing Platforms

Advanced Electronic Materials, EarlyView.
Material strategies enabling stimulation and recording are central to neural biocomputing systems. This review examines how electronic materials govern the encoding of inputs and decoding of outputs in living neural networks. Advances in electrical, optical, and multimodal interfaces highlight emerging design principles for biocomputing platforms ...
Sehong Kang, Junggeon Park, Aryaman Joshi, Rakid Haque, Gyu Weon Hwang, Hyunjoon Kong   +5 more
wiley   +1 more source