Results 51 to 60 of about 12,458 (247)

Spiral-logarithmic structures in a Heisenberg ferromagnet [PDF]

Journal of Experimental and Theoretical Physics Letters, 2001
Spiral-logarithmic structure is suggested as a stationary solution of a modified equation for the Heisenberg model, and the single- and N-soliton solutions are constructed on this base.
openaire   +2 more sources

LOGARITHMIC SPIRAL LIGHT PIPE FOR SCINTILLATORS [PDF]

, 1960
A prccedure is described for designing and making logarithmic spiral light pipes which are to be used in coupling scintillators to photomultipliers in cases where the scintillator must be placed in a strong magnetic field. (C.J.G.)
Kaiser, William C., MacKay, Anthony J., Managan, William W.   +2 more
openaire   +2 more sources

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

Logarithmic spiral trajectories generated by Solar sails

Celestial Mechanics and Dynamical Astronomy, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Bassetto M, Niccolai L, Quarta A, Mengali G   +3 more
openaire   +3 more sources

Tracing the Spiral Structure of the Outer Milky Way with Dense Atomic Hydrogen Gas

, 2017
We present a new face-on map of dense neutral atomic hydrogen (HI) gas in the outer Galaxy. Our map has been produced from the Leiden/Argentine/Bonn (LAB) HI 21-cm line all-sky survey by finding intensity maxima along every line of sight and then by ...
Balser, Dana S., Kim, Woong-Tae, Koo, Bon-Chul, Lee, Myung Gyoon, Park, Geumsook, Wenger, Trey V., 김웅태   +6 more
core   +1 more source

Mapping of Physiological Signals From Wireless Battery‐Free Implants With Plane‐Wave Ultrasound Imaging

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, Hugo Guillot, Ouafae Firdaouissi, Mohammed Irar, Lionel Rousseau, Clément Hébert, Maxime Lafond   +6 more
wiley   +1 more source

Bidirectional Process Prediction in the Laser‐Induced‐Graphene Production Using Blackbox Deep Learning

Advanced Materials Technologies, EarlyView.
This study shows that a lightweight blackbox neural network provides a practical, cost‐effective solution for bidirectional process prediction in laser‐induced graphene (LIG) fabrication. Achieving high predictive performance with minimal overhead, the approach democratizes machine learning (ML) for resource‐limited environments.
Maxim Polomoshnov, Nitheesh M. Nair, Gerardo Hernández‐Sosa, Markus Reischl   +3 more
wiley   +1 more source

From Golden Spirals to Constant Slope Surfaces

, 2009
In this paper, we find all constant slope surfaces in the Euclidean 3-space, namely those surfaces for which the position vector of a point of the surface makes constant angle with the normal at the surface in that point.
Dillen F., do Carmo M. P., Kappraff J., Kühnel W., Lévy M., Marian Ioan Munteanu, Tucker V. A., Tucker V. A.   +7 more
core   +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, Mengjie Zhang, Wenying Liu, Wenlong Shen, Debao Li, Hongming Miao, Fang Deng, Gang Zhang, Yi Tian, Yi Zhang, Zhihu Zhao, Bing Ni   +11 more
wiley   +1 more source

Spiral structure in nearby galaxies I. Sample, data analysis, and overview of results

, 2011
This paper, the first of two, introduces an observational study of spiral structure in galaxies chosen from the SINGS survey. Near infrared (NIR) and optical data are used to produce mass surface density maps, and from these the morphology of the disc is
Bell, Bell, Bertin, Block, Block, Block, Bottema, Braun, Buta, Byrd, C. Clarke, Canzian, Clarke, Daigle, de Blok, Dicaire, Dobbs, Dobbs, Duley, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Fazio, Flagey, Gerola, Gittins, Grosbøl, Helou, Israel, Jiménez-Vicente, Karachentsev, Karachentseva, Kendall, Kennicutt, Kennicutt, Kilborn, Knapen, Korchagin, Kormendy, Lin, Lin, Lindblad, Mueller, Oh, Peng, Pisano, R. C. Kennicutt, Regan, Relaño, Roberts, Roberts, S. Kendall, Salo, Schweizer, Seigar, Seigar, Sellwood, Sellwood, Semelin, Sil’chenko, Taga, Theis, Thornley, Tokunaga, Toomre   +70 more
core   +1 more source