Results 91 to 100 of about 11,957,855 (289)

Using an aliasing operator and a single discrete Fourier transform to down-sample the Fresnel transform [PDF]

, 2012
In Digital Holography there are applications where computing a few samples of a wavefield is sufficient to retrieve an image of the region of interest.
María Albertina Castro Ibarra, MIGUEL OCTAVIO ARIAS ESTRADA   +1 more
core  

Parameterising Arbitrary Shapes via Fourier Descriptors for Evidence-Gathering Extraction

, 1998
According to the formulation of the Hough transform it is possible to extract any shape that can be represented by an analytic equation with a number of free parameters.
Nixon, M.S., Aguado, A.S., Montiel, M.E.
core   +1 more source

Beyond Nanoporosity: A CO2‐Conditioned Glassy Matrix Contributes to the Brittle‐to‐Ductile Transition of Nanocellular Polyetherimide

Advanced Materials, EarlyView.
The mechanical performance of nanocellular polyetherimide cannot be explained by nanoporosity alone. It is shown that CO2 saturation and desorption leave a distinct mechanical signature in the glassy matrix before foaming. This matrix contribution provides a new route to understand and optimize the brittle to ductile transition in nanocellular polymers.
Félix Lizalde‐Arroyo, Frederik Van Loock, Victoria Bernardo, Tuuli Peltola, René Bes, Alberto Tena, Miguel Ángel Rodríguez‐Pérez, Judith Martín‐de León   +7 more
wiley   +1 more source

Electropolymerized Aptasensor for Femtogram‐Level Cytokine Detection

Advanced Materials, EarlyView.
Electropolymerization of 3‐amino‐ʟ‐tyrosine creates ultrathin, smooth, and chemically robust pALT nanofilms with accessible carboxyl functionalities for direct aptamer immobilization. Integrated with fiber‐optic SPR and OECT platforms, these interfaces enable IL‐6 detection down to 100 fg mL−1 and provide a versatile route to bioelectronic sensing ...
Jiyao Yu, Renan Colucci, Rachel X. Shi, Qi Lu, Tommaso Marchesi D'Alvise, Ulrike Kraft, Christopher V. Synatschke, Tanja Weil   +7 more
wiley   +1 more source

The effect of muffler design on reducing the noise pollution of a small two-stroke engine

Results in Engineering
Designing an efficient muffler for single-cylinder IC engines is not an easy task due to the limitation in designing a large muffler and the possibility of engine suffocation.
Shahryar Sedighi, Davood Kalantari, Jozef Rédl, Mohammad Kaveh, Mariusz Szymanek, Agata Dziwulska-Hunek   +5 more
doaj   +1 more source

Ion Concentration and Voltage Imaging With Fluorescent Nanodiamonds

Advanced Materials, EarlyView.
We demonstrate reversible switching between the fluorescent NV0 and the dark NV+ state, in sub‐30 nm FNDs via surface oxidation and hydrogenation, respectively. In an electrochemical cell, we show that the fluorescence from hydrogenated particles enables all‐optical imaging of voltages and ion concentrations at the micrometer scale.
Patrick Voorhoeve, Alessandro Mameli, Hiroshi Abe, Takeshi Ohshima, Qiang Sun, Anita Quigley, Rob Kapsa, Nikolai Dontschuk, Philipp Reineck   +8 more
wiley   +1 more source

Analytic solution of a shallow buried tunnel excavated in orthotropic rock mass

Scientific Reports
Rock masses naturally exhibit significant anisotropy, however, majority of the analytic solution of a half-plane with a hole are based on the isotropic assumption, which would result in the larger difference from the real scenario.
Qiaofeng Chen, Shengxiang Lei, Qinghua Xiao, Guobo Wang, Xiangyu Han   +4 more
doaj   +1 more source

Extreme Bond Ionicity in Mg─Te Chalcogenides for Ultrathin Low Voltage Selector‐Only Memory beyond the Leakage Scaling Limit

Advanced Materials, EarlyView.
Mg─Te chalcogenides address the leakage scaling trade‐off in ultrathin selector‐only memory. Structural partitioning in multiphase Mg─Te, combined with highly ionic Mg─Te bonding and Hf interfacial engineering, supports reliable 5 nm thickness operation at low write voltage with suppressed leakage current, narrow threshold voltage distributions, 10 ns ...
Yoori Seo, Dongmin Kim, Yu Bin Park, Jangseop Lee, Tae Hoon Lee, Hyunsang Hwang   +5 more
wiley   +1 more source

The spectrum of pure dS3 gravity in the static patch

Journal of High Energy Physics
We consider the quantum mechanical description of the de Sitter static patch in three-dimensional general relativity. We consider a Lorentzian path integral that conjecturally computes the Fourier transform of the spectrum of the static patch Hamiltonian.
Joydeep Chakravarty, Alexander Maloney, Keivan Namjou, Simon F. Ross   +3 more
doaj   +1 more source

Ionic Gating of Liquid‐Crystal‐Like Pteridine Assemblies Enables Tunable Light Scattering

Advanced Materials, EarlyView.
Tunable optical properties emerge through developmentally regulated ionic gating, which transforms disordered, ultraviolet (UV)‐absorbing organelles into concentrically ordered, liquid‐crystal‐like light scatterers. By integrating analyses of pteridine composition, potassium‐dependent assembly, hierarchical ultrastructure, and optical behavior, the ...
Sourabh Bera, Zohar Eyal, Yael Noy, Yuval Barzilay, Siddharth Sahoo, Srikant Moharana, Avi Baram, Tali Lerer‐Goldshtein, Neta Varsano, Bar Bader, Lothar Houben, Uwe Heinig, Iddo Pinkas, Moshe Goldsmith, Tamar Unger, Shira Albeck, Andrea Sorrentino, Maxim Itkin, Sergey Malitsky, Ziv Porat, Ido Hadar, Venkata Jayasurya Yallapragada, Dvir Gur   +22 more
wiley   +1 more source