gebhart/patrepeval huggingface dataset:
Nanoscale pillar hypersonic surface phononic crystals (2016)

We report on nanoscale pillar-based hypersonic phononic crystals in single crystal Z-cut lithium niobate. The phononic crystal is formed by a two-dimensional periodic array of nearly cylindrical nanopillars 240 nm in diameter and 225 nm in height, arranged in a triangular lattice with a 300-nm lattice constant. The nanopillars are fabricated by the recently introduced nanodomain engineering via laser irradiation of patterned chrome followed by wet etching. Numerical simulations and direct measurements using Brillouin light scattering confirm the simultaneous existence of nonradiative complete surface phononic band gaps. The band gaps are found below the sound line at hypersonic frequencies in the range 2--7 GHz, formed from local resonances and Bragg scattering. These hypersonic structures are realized directly in the piezoelectric material lithium niobate enabling phonon manipulation at significantly higher frequencies than previously possible with this platform, opening new opportunities for many applications in plasmonic, optomechanic, microfluidic, and thermal engineering.
Acoustic event detection based on non-negative matrix factorization with mixtures of local dictionaries and activation aggregation (2016)

This paper proposes a new non-negative matrix factorization (NMF) based acoustic event detection (AED) method with mixtures of local dictionaries (MLD) and activation aggregation. One of the key problems of conventional NMF-based methods is instability of activations due to redundancy of a region spanned by the bases of dictionaries. Sounds inside the redundant region are often decomposed into undesired combinations of bases and activations that cause failure of detection. The proposed method employs MLD for allocating sub-groups of basis dictionaries to acoustic elements to minimize redundancy in the region and obtain controlled activations. In order to make activations more stable, the proposed method also introduces activation aggregation which combines basis-wise activations into acoustic-element-wise activations. Much more stable activations by the proposed method lead to significant improvement in F-measure by up to 60% compared to an ordinary convolutive-NMF-based method. The proposed method also outperforms a latest alternative which is not based on NMF.
NiO Thin Films Synthesized by Atomic Layer Deposition using Ni(dmamb)2 and Ozone as Precursors (2012)

Abstract NiO thin films are deposited by atomic layer deposition (ALD) from the Ni(dmamb) 2 (dmamb = 1‐dimethylamino‐2‐methyl‐2‐butanolate) precursor using O 3 as the oxidizer. The films are analyzed for wafer uniformity, structure, composition, morphology, microstructure, and homogeneity. The Ni(dmamb) 2 half‐cycle shows an initial rapid partial saturation followed by slower further adsorption. By contrast, the O 3 half‐cycle shows good saturation behavior. In the studied deposition temperature range for ALD, the films are polycrystalline with negligible amounts of carbon in the films. Furthermore, the films are homogeneous in thickness and composition, demonstrating that high‐quality NiO films can be deposited by ALD from Ni(dmamb) 2 .
Introduction to the Issue on Perception Inspired Video Processing (2014)

The articles in this special issue focus on technologies and applications that support perception inspired video processing technologies.
Conformality of atomic layer deposition in microchannels: impact of process parameters on the simulated thickness profile (2022)

Unparalleled conformality is driving ever new applications for atomic layer deposition (ALD), a thin film growth method based on repeated self-terminating gas-solid reactions. In this work, we re-implemented a diffusion-reaction model from the literature to simulate the propagation of film growth in wide microchannels and used that model to explore trends in both the thickness profile as a function of process parameters and different diffusion regimes. In the model, partial pressure of the ALD reactant was analytically approximated. Simulations were made as a function of kinetic and process parameters such as the temperature, (lumped) sticking coefficient, molar mass of the ALD reactant, reactant's exposure time and pressure, total pressure, density of the grown material, and growth per cycle (GPC) of the ALD process. Increasing the molar mass and the GPC, for example, resulted in a decreasing penetration depth into the microchannel. The influence of the mass and size of the inert gas molecules on the thickness profile depended on the diffusion regime (free molecular flow <i>vs.</i> transition flow). The modelling was compared to a recent slope method to extract the sticking coefficient. The slope method gave systematically somewhat higher sticking coefficient values compared to the input sticking coefficient values; the potential reasons behind the observed differences are discussed.
A novel platform for comprehensive CMR examination in a clinically feasible scan time (2014)

Background Cardiac magnetic resonance imaging has been shown to be one of the best technologies for the evaluation of cardiovascular pathologies. However, its widespread adoption has been held back by the lack of software infrastructure and specific pulse sequences that can provide a feasibly quick, comprehensive cardiac examination. We have developed an intuitive software package that can perform a comprehensive CMR examination in 30 to 45 minutes.
Microwave building block filters using genetic optimization (2010)

The filters are composed of a cascade of non-loaded rectangular cavities where several resonant modes are considered. The cavities are interconnected through rectangular waveguide sections. All resonant modes are used near their cutoff frequencies to reduce the size of the filters. Rather than relying on modeling the coupling coefficients between cavities, the technique is based on defining multimodal scattering matrices for all the building blocks composing the filter. The main building blocks are simple rectangular waveguide sections and change in cross section dimension discontinuities. A fast custom simulator based on the scattering matrices was developed and was used with an optimization method based on the genetic algorithm to design filters with Generalized Chebsyhev type characteristics. A 14 GHZ forth order filter with two transmission zeros as well as a 20 GHZ seventh order filter with four transmission zeros were designed and built and their measured responses are provided.
Programmable modulation for high-capacity networks (2012)

Software-defined optics is used to configure the transponders in high-capacity communication systems. Reach, data rate, and spectral efficiency are three parameters which are traded-off to achieve an optimized network capacity.
The Encrypted Elliptic Curve Hash. (2008)

Bellare and Micciancio’s MuHASH applies a pre-existing hash function to map indexed message blocks into a secure group. The resulting hash is the product. Bellare and Micciancio proved, in the random oracle model, that MuHASH is collision-resistant if the group’s discrete logarithm problem is infeasible. MuHASH, however, relies on a pre-existing hash being collision resistant. In this paper, we remove such a reliance by replacing the pre-existing hash with a block cipher under a fixed key. We adapt Bellare and Micciancio’s collision-resistance proof to the ideal cipher model. Preimage resistance requires us to add a further modification. Key Words: Hash Function, Collision Resistance 1
Modeling the ultra-wideband outdoor channel: Measurements and parameter extraction method (2010)

This paper presents results from an outdoor measurement campaign for ultra-wideband channels at gas stations. The results are particularly relevant for "infostations" where large amounts of data are downloaded to a user within a short period of time. We describe the measurement setup and present a novel high-resolution algorithm that allows the identification of the scatterers that give rise to multipath components. As input, the algorithm uses measurements of the transfer function between a single-antenna transmitter and a long uniform linear virtual array as receiver. The size of the array ensures that the incoming waves are spherical, which improves the estimation accuracy of scatterer locations. Insight is given on how these components can be tracked in the impulse response of a spatially varying terminal. We then group the detected scatterers into clusters, and investigate the angular power variations of waves arriving at the receiver from the clusters. This defines the cluster's "radiation pattern." Using sample measurements we show how obstacles obstruct the line-of-sight component -- a phenomenon commonly referred to as "shadowing." We compare the measurement data in the shadowing regions (locations of the receiver experiencing shadowing) with the theoretical results predicted by diffraction theory and find a good match between the two.
Order and coherence in the fate map of the zebrafish nervous system (1995)

The zebrafish is an excellent vertebrate model for the study of the cellular interactions underlying the patterning and the morphogenesis of the nervous system. Here, we report regional fate maps of the zebrafish anterior nervous system at two key stages of neural development: the beginning (6 hours) and the end (10 hours) of gastrulation. Early in gastrulation, we find that the presumptive neurectoderm displays a predictable organization that reflects the future anteroposterior and dorsoventral order of the central nervous system. The precursors of the major brain subdivisions (forebrain, midbrain, hindbrain, neural retina) occupy discernible, though overlapping, domains within the dorsal blastoderm at 6 hours. As gastrulation proceeds, these domains are rearranged such that the basic order of the neural tube is evident at 10 hours. Furthermore, the anteroposterior and dorsoventral order of the progenitors is refined and becomes aligned with the primary axes of the embryo. Time-lapse video microscopy shows that the rearrangement of blastoderm cells during gastrulation is highly ordered. Cells near the dorsal midline at 6 hours, primarily forebrain progenitors, display anterior-directed migration. Cells more laterally positioned, corresponding to midbrain and hindbrain progenitors, converge at the midline prior to anteriorward migration. These results demonstrate a predictable order in the presumptive neurectoderm, suggesting that patterning interactions may be well underway by early gastrulation. The fate maps provide the basis for further analyses of the specification, induction and patterning of the anterior nervous system, as well as for the interpretation of mutant phenotypes and gene-expression patterns.
Predicting accuracy in pose estimation for marker-based tracking (2003)

Tracking is a necessity for interactive virtual environments. Marker-based tracking solutions involve the placement of fiducials in a rigid configuration on the object(s) to be tracked, called a tracking probe. The realization that tracking performance is linked to probe performance necessitates investigation into the design of tracking probes for proponents of marker-based tracking. A challenge involved with probe design is predicting the accuracy of a tracking probe. We present a method for predicting the accuracy of a tracking probe based upon a first-order propagation of the errors associated with the markers on the probe. Results for two sample tracking probes show excellent agreement between measured and predicted errors.
Stabilized Naked Sub-nanometric Cu Clusters within a Polymeric Film Catalyze C–N, C–C, C–O, C–S, and C–P Bond-Forming Reactions (2015)

Sub-nanometric Cu clusters formed by endogenous reduction of Cu salts and Cu nanoparticles are active and selective catalysts for C-N, C-C, C-O, C-S, and C-P bond-forming reactions. Sub-nanometric Cu clusters have also been generated within a polymeric film and stored with full stability for months. In this way, they are ready to be used on demand and maintain high activity (TONs up to 10(4)) and selectivity for the above reactions. A potential mechanism for the formation of the sub-nanometric clusters and their electronic nature is presented.
Role of defect saturation in improving optical response from InGaN nanowires in higher wavelength regime (2020)

Growth of InGaN, having high Indium composition without compromising crystal quality has always been a great challenge to obtain efficient optical devices. In this work, we extensively study the impact of non-radiative defects on optical response of the plasma assisted molecular beam epitaxy (PA-MBE) grown InGaN nanowires, emitting in the higher wavelength regime ([Formula: see text] nm). Our analysis focuses into the effect of defect saturation on the optical output, manifested by photoluminescence (PL) spectroscopy. Defect saturation has not so far been thoroughly investigated in InGaN based systems at such a high wavelength, where defects play a key role in restraining efficient optical performance. We argue that with saturation of defect states by photo-generated carriers, the advantages of carrier localization can be employed to enhance the optical output. Carrier localization arises because of Indium phase segregation, which is confirmed from wide PL spectrum and analysis from transmission electron microscopy (TEM). A theoretical model has been proposed and solved using coupled differential rate equations in steady state to undertake different phenomena, occurred during PL measurements. Analysis of the model helps us understand the impact of non-radiative defects on PL response and identifying the origin of enhanced radiative recombination.
Allgemeiner Zugang zu Polyaminen mit Ethan‐1,2‐diamin‐Einheiten: Synthese von nicht natürlich vorkommenden homologen und isomeren N 1 ,4‐Di(4‐cumaroyl)sperminen (1998)

█tl="American"█The synthesis of the three N,N′-di(4-coumaroyl)tetramines, i.e., of (E,E)-N-{3-[(2-aminoethyl)amino]propyl}-3,3′-bis(4-hydroxyphenyl)-N,N′-(ethane-1,2-diyl)bis[prop-2-enamide] (1a), (E,E)-N-{4-[(2-aminoethyl)amino]butyl}-3,3′-bis(4-hydroxyphenyl)-N,N′-(ethane-1,2-diyl)bis[prop-2-enamide] (1b), and (E,E)-N-{6-[(2-aminoethyl)amino]hexyl}-3,3′-bis(4-hydroxyphenyl)-N,N′-(ethane-1,2-diyl)bis[prop-2-enamide] (1c), is described. It proceeds through stepwise construction of the symmetric polyamine backbone including protection and deprotection steps of the amino functions. Their behavior on TLC in comparison with that of 1,4-di(4-coumaroyl)spermine (=(E,E)-N-{4-[(3-aminopropyl)amino]butyl}-3,3′-bis(4-hydroxyphenyl)-N,N′-(propane-1,3-diyl)bis[prop-2-enamide]; 2) is discussed.
ChemInform Abstract: KINETIC STUDIES ON FOUR‐COORDINATE CHELATE COMPLEXES OF COPPER(II): ISOTOPIC LIGAND EXCHANGE OF BIS(SALICYLALDIMINATO)COPPER(II) IN TOLUENE (1979)

Abstract Die Geschwindigkeit des Ligandenaustauschs an "II‐markierten N‐alkylsubstituierten Bis‐[salicylaldiminato]‐ Cu‐Komplexen (I) in Toluol in Abhängigkeit von der Natur des Restes Rund den Eigenschaften des Ringsubstituenten wird mit Hilfe einer Isotopenaustauschtechnik bestimmt.
Guide to Further Studies (2008)

This chapter contains sections titled: Verification of Telecommunication Systems Verification Using Colored Petri Nets Verification of Traffic Signal Control Systems References
Evaluation of Propagation Characteristics in Indoor Environment for MIMO System (2005)

This paper presented that receiver correlation was lowered by using dual polarized antenna array in both the LOS and NLOS environments. In the LOS environment, the difference of the angle of polarization made no difference for both of the single and the dual polarization case, and the advantage of eigenvalues for dual polarization worked effectively. On the other hand, in the NLOS environment, although the advantage of eigenvalue for the dual polarized case was observed, it didn't overwhelm the power loss deriving from dual polarization. This is because the V component became dominant comparing the H component with the existence of partition, which gave high SNR and capacity to the single V polarized case in the calculated model. Finally, it is necessary to reexamine these results in more realistic simulation model and in experimental method.
Hydroquinone Based Hydrophilic- Hydrophobic Block Copolymers for Proton Exchange Membranes (2012)

INTRODUCTION Multiblock copolymers have been demonstrated to be excellent candidates for proton exchange membranes for H2/Air (PEMFC) and direct methanol fuel cells (DMFC), due to their hydrophobic-hydrophilic block behavior. These block polymers form highly order morphologies with the hydrophobic phase providing the chemical and thermal stability, and the hydrophilic phase forming well connected channels for proton transport. As previously reported in the McGrath group, these block copolymers show improved proton conductivity over different ranges of relative humidity (RH) and temperature than the random copolymer or Nafion membranes. In these systems the hydrophilic component has been primarily based on sulfonated biphenyl sulfonated (BPSH-100) poly(arylene ethers). However, hydroquinone based sulfonated HQS-100) poly(arylene ethers) provide many advantages over the biphenyl systems such as; lower cost, high ion exchange capacity (IEC), and potentially better nano-phase separation between the hydrophobic and hydrophilic segments. The hydroquinone based hydrophilic-hydrophobic block copolymers produced tough, transparent, and durable films, that showed excellent proton conductivity and RH performance. The synthesis and characterization of these materials will be discussed.
Supplementary Table 1 from Next-Generation Sequencing Analysis and Algorithms for PDX and CDX Models (2023)

&lt;p&gt;Mapping percentages for RNA-sequencing datasets.&lt;/p&gt;
Multiphase CFD Modeling and Experimental Validation of Polymer and Attenuating Air Jet Interactions in Nonwoven Annular Melt Blowing (2022)

In annular melt blowing, fiber formation is achieved by accelerating a molten polymer via drag forces imparted by high velocity air that attenuates the polymer jet diameter. The interactions at the polymer-air interface, which govern the motion of the jets and impact the resulting fiber characteristics, are important but not well understood yet. This work details the development and validation of a multiphase computational fluid dynamics (CFD) model to investigate these interactions and the effects of three key melt blowing process parameters (polymer viscosity and throughput, and air velocity) on two critical fiber attributes - whipping instability and fiber diameter. Simulation results highlighted that whipping instability was driven by the polymer-air velocity differential, and the fiber diameter was primarily modulated by polymer throughput and air velocity. The CFD model was validated by modulating the polymer and air throughputs and analyzing the fiber diameter experimentally. Empirical results showed good agreement between fabricated and model-estimated fiber diameters, especially at lower air velocities. An additional CFD simulation performed using a melt blowing nozzle geometry and process parameters described in literature also confirmed good correlation between model estimates and literature empirical data.
Optimizing gas networks using adjoint gradients (2018)

An increasing amount of gas-fired power plants are currently being installed in modern power grids worldwide. This is due to their low cost and the inherent flexibility offered to the electrical network, particularly in the face of increasing renewable generation. However, the integration and operation of gas generators poses additional challenges to gas network operators, mainly because they can induce rapid changes in the demand. This paper presents an efficient minimization scheme of gas compression costs under dynamic conditions where deliveries to customers are described by time-dependent mass flows. The optimization scheme is comprised of a set of transient nonlinear partial differential equations that model the isothermal gas flow in pipes, an adjoint problem for efficient calculation of the objective gradients and constraint Jacobians, and state-of-the-art optimal control methods for solving nonlinear programs. As the evaluation of constraint Jacobians can become computationally costly as the number of constraints increases, efficient constraint lumping schemes are proposed and investigated with respect to accuracy and performance. The resulting optimal control problems are solved using both interior-point and sequential quadratic programming methods. The proposed optimization framework is validated through several benchmark cases of increasing complexity.
Improvement of frequency response for a zero-flux current measuring system (2014)

Magnetic zero-flux current transformers are widely utilized to measure AC and DC electrical currents. To improve the AC characteristics between 10 Hz and 100 kHz, a method is proposed to evaluate adjustments in the circuitry; increase of the amplification in the AC feed-back circuit and introduction of an external coaxial read-out shunt resistor. The method is generally applicable and includes a coaxial current path within the entire reference system and traceability to national standards. The AC working range is extended from about 1 kHz to about 3 kHz. Outside the nominal AC working range, the scale factor variation is reduced from 45 % to 3.5% and the phase angle error offset changes from ca 5.8 μs to below 0.3 μs.
Adaptive feedforward control for active noise cancellation in-ear headphones (2013)

Noise can be disturbing, stressful or even harmful. Headphones with active noise cancellation (ANC) can enhance the user's comfort, especially when travelling. On a plane or a train, in the street or at work, these headphones give the possibility to reduce unwanted noise. The range of ANC headphones on the market is constantly increasing. Circumaural and supra-aural headphones with different control strategies have been available for a long time; over the last few years the product lines have been expanded to in-ear headphones. These headphones already have quite a good passive attenuation and are equipped with feedforward control for active noise cancellation. The best results in attenuation are achieved by semi-adaptive digital controls, which choose the best filter depending on the noise spectrum and can be manually adapted to the user. A fully adaptive control has already been proven to be very effective in aviation headsets and other ANC applications. Besides the market analysis of ANC headphones we would like to present an adaptive feedforward control for in-ear headphones and highlight the advantages compared to a static feedforward control.
Corneille de Neny (1718-1776): un bruxellois secrétaire de cabinet de l'impératrice Marie-Thérèse (2004)

info:eu-repo/semantics/published
Characterizing PFAS contamination from bench-top assessment of complex resistivity (CR) and nuclear magnetic resonance (NMR) measurements (2020)

The distribution of polyfluoroalkyl substances (PFAS) in aqueous film forming foam (AFFF)-impacted source areas remains poorly understood. New field methods to delineate and characterize these source areas are needed to better understand the fate of these contaminants in the subsurface. We performed bench-top experiments to evaluate the potential for using two existing borehole-deployable geophysical technologies, Complex Resistivity (CR) and Nuclear Magnetic Resonance (NMR), as rapid screening tools for the evaluation of PFASs in soils/sediments. PFAS sorption onto soil surfaces was postulated to influence both CR and NMR signals in soils. Using benchtop experiments, we observed a measurable response related to AFFF with CR measurements, and may see a correlation between NMR and CR data within natural soils collected from an AFFF contaminated site. Note: This paper was accepted into the Technical Program but was not presented at the 2020 SEG Annual Meeting.