Results 61 to 70 of about 12,450 (260)
Self‐Oscillating Helix Showing Amplified Winding and Unwinding Motions
Advanced Materials, EarlyView.The hydrogel helix exhibits autonomous oscillation synchronized with the Ru(bpy)32+/3+ redox cycle in the Belousov–Zhabotinsky reaction. Periodic winding–unwinding accompanies magnified motion along one direction within the gel phase. ABSTRACT Helical architectures in nature amplify motion via winding–unwinding.
Taehun Chung +11 more
wiley +1 more source
Coherent quantum squeezing due to the phase space noncommutativity
, 2015 The effect of phase space general noncommutativity on producing deformed coherent squeezed states is examined. A two-dimensional noncommutative quantum system supported by a deformed mathematical structure similar to that of Hadamard billiards is ...
Bernardini, Alex E., Mizrahi, Salomon S.
core +1 more source
Advanced Materials Technologies, EarlyView.Combined approach of electromagnetic (Power) and ultrasound (data harvesting) waves is proposed to address the miniaturized ultrasonic implants. Electromagnetic waves trigger the piezoelectric element to generate the acoustic pulse which is modulated by the variations in the sensor's impedance.
Anam Bhatti +6 more
wiley +1 more source
IEEE AccessThis paper introduces a novel ultrathin frequency selective surface (FSS) based on interconnected logarithmic spiral geometries. The structure is fabricated on a flexible polyimide substrate with a thickness of 0.05 mm, a relative permittivity of 4.3 ...
Maciel Alves de Oliveira +5 more
doaj +1 more source
Chronic Hypoxia Disrupts Spermatogenesis Through ASXL2–EZH2–Mediated Microtubule Destabilization
Advanced Science, EarlyView.This study reveals the mechanism by which chronic hypoxia impairs spermatogenesis via the ASXL2–EZH2 axis, hindering the transition of spermatids from round to elongated forms. Key findings reveal that under hypoxic conditions, downregulated ASXL2 expression reduces EZH2 binding to the CEP162 promoter, leading to decreased H3K27me3 modification and ...
Jun Yin +11 more
wiley +1 more source
Curves in Archeology: Computing the Volume of a Greek Vase
MetrologyThe concept of dynamic symmetry in art and extensive measurements on Greek vases suggest that a vase and its parts can be inscribed into similar rectangles, with all rectangles having the same ratio of lengths of their side.
Siddhant Shah +2 more
doaj +1 more source
Nuclear Spirals as Signatures of Supermassive Black Holes
, 2004 Recent high resolution images of spiral galaxies show wide varieties of features including nuclear spirals in the central parts. Some of the galaxies show grand-design nuclear spirals.
Ann, Hong Bae, Lee, Hyung Mok
core +2 more sources
Advanced Science, EarlyView.A new class of biohybrid spheroids is engineered through the self‐assembly of adherent cells and extracellular matrix‐mimetic hydrogel microparticles (microgels). By mimicking a snowballing effect, this approach enables scalable formation of porous, millimeter‐scale spheroids with enhanced cell viability and molecular diffusion.
Zaman Ataie +7 more
wiley +1 more source
Heuristically Adaptive Diffusion‐Model Evolutionary Strategy
Advanced Science, EarlyView.Building on the mathematical equivalence between diffusion models and evolutionary algorithms, researchers demonstrate unprecedented control over evolutionary optimization through conditional diffusion. By training diffusion models to associate parameters with specific traits, they can guide evolution toward solutions exhibiting desired behaviors ...
Benedikt Hartl +3 more
wiley +1 more source
A New View of the Spiral Structure of the Northern Outer Milky Way in Carbon Monoxide
The Astrophysical Journal LettersBased on 32,162 molecular clouds from the Milky Way Imaging Scroll Painting project, we obtain new face-on molecular gas maps of the northern outer Galaxy. The total molecular gas surface density map reveals three segments of spirals, extending 16–43 kpc
Yan Sun +15 more
doaj +1 more source