Results 131 to 140 of about 313,820 (353)

Continuum Mechanics Modeling of Flexible Spring Joints in Surgical Robots

Advanced Robotics Research, EarlyView.
A new mechanical model of a tendon‐actuated helical extension spring joint in surgical robots is built using Cosserat rod theory. The model can implicitly handle the unknown contacts between adjacent coils and numerically predict spring shapes from straight to significantly bent under actuation forces.
Botian Sun, Liang Zhang, Jianwen Zeng, Xuefeng Wang   +3 more
wiley   +1 more source

Auriculoventricular Nodal Escape in the Presence of Auricular Fibrillation [PDF]

, 1950
Won Ju Hwang, Richard Langendorf
openalex   +1 more source

Super‐Convergent Meshless Computations for Active Vibration Control of Bi‐Directional Functionally Graded Terfenol‐D Beams with Twisted Geometry

Advanced Theory and Simulations, EarlyView.
This study develops a superconvergent meshless method to analyze and control vibrations in twisted, bidirectional functionally graded Terfenol‐D beams. By optimizing magnetostrictive patch placement, it demonstrates effective vibration suppression under dynamic loads, highlighting the design potential of strategically graded materials in complex ...
Mukund A. Patil, Tanmoy Mukhopadhyay, Susmita Naskar   +2 more
wiley   +1 more source

A graph theory interpretation of nodal regions [PDF]

, 1961
John D. Nystuen, Michael F. Dacey
openalex   +2 more sources

Reflexiones sobre la teoría socio-cultural de l. S. Vigotski

Duazary, 2013
La comprensión de la enseñanza como fuente del desarrollo psíquico del hombre, fue introducida en la Psicología soviética por Vigotski (1935-1956). El carácter activo de los procesos psíquicos, el punto nodal del proceso de desarrollo social y humano lo ...
Eduardo Veloso Pérez, Eduardo Veloso Pérez, Rosa M. Rodríguez Santos, Yisell López González, Ariadna Veloso Rodríguez   +4 more
doaj  

A criticism of the Nodal slide as an aid in testing photographic lenses [PDF]

, 1922
Tyler A. Smith, John S. Anderson
openalex   +1 more source

Utilizing Causal Network Markers to Identify Tipping Points ahead of Critical Transition

Advanced Science, EarlyView.
The study proposes a causal network markers (CNMs) framework to identify early‐warning signals preceding critical transitions. It validates CNMs on various computational benchmark models and real‐world datasets, demonstrating higher accuracy and flexibility compared to existing approaches.
Shirui Bian, Zezhou Wang, Siyang Leng, Wei Lin, Jifan Shi   +4 more
wiley   +1 more source

DKK3 Initially Preserves Acinar Integrity Through MEK‐Fos Signaling, but Later Switches to an Oncogenic Role in Pancreatic Cancer

Advanced Science, EarlyView.
In pancreatic cancer, the protein DKK3 is found to play a complex role: it initially slows early tumor growth but later promotes tumor aggressiveness. DKK3 expression evolves during progression and drives cancer severity by orchestrating cellular and molecular signaling pathways.
Dharini Srinivasan, Elodie Roger, Lukas Perkhofer, Eleni Zimmer, Thomas F.E. Barth, Julia P. Mosler, Anna Härle, Stephanie E. Weissinger, Nadine T. Gaisa, Peter Möller, Nico Fischer, Chantal Allgöwer, J.‐Matthias Löhr, Dirk Grimm, Thomas Seufferlein, Stefan Liebau, Ninel Azoitei, Michael K. Melzer, Frank Arnold, Johann Gout, Alexander Kleger   +20 more
wiley   +1 more source

Single‐Cell Transcriptomics Reveals ITGA2‐Mediated Metabolic Reprogramming and Immune Crosstalk in Pediatric Thyroid Carcinogenesis

Advanced Science, EarlyView.
This study unveils ITGA2⁺ tumor cells as key drivers of pediatric thyroid cancer aggressiveness. These cells orchestrate dual oncogenic pathways: GLUT1‐mediated glycolytic reprogramming and M2 macrophage polarization. This metabolic‐immunological crosstalk promotes tumor progression and metastasis.
Zhi‐jun Zhan, Ning Li, Yan Sun, Lu Chen, Jun‐da Yin, Yun‐han Shan, Jia‐xing Zeng, Zhe‐cheng Li, Hai‐long Tan, Neng Tang, Shi Chang, Peng Huang   +11 more
wiley   +1 more source

Forelimb Motor Learning and Memory Consolidation Drives Distinct Oligodendrocyte Plasticity to Regulate Task‐related Neuronal Activity

Advanced Science, EarlyView.
Genetic and chemical tracking of oligodendrogenesis, combining fiber photometric neuronal activity recording, reveals that distinct oligodendrocyte plasticities are adopted during different phases of motor learning to fine‐tune task‐related neuronal activity, with a preferential involvement of oligodendrogenesis suppression and node lengthening (type 2
Shuming Wang, Nuo Xu, Wenwen Wang, Yongxiang He, Yuqian Yang, Liuning Zhang, Yanping Zou, Yuehua He, Huiliang Li, Liang Gao, Lin Xiao   +10 more
wiley   +1 more source