gebhart/patrepeval huggingface dataset:
Development of a 3-D model for eddy current testing (application to fastened structures in aeronautics) (2007)

Un des enjeux du Contrôle Non Destructif (CND) par Courants de Foucault (CF) dans le domaine aéronautique est l inspection de structures rivetées pour détecter d éventuels défauts qui peuvent se créer en pied de rivet. Pour apporter des éléments de réponse à cette problématique, EADS et le CEA LIST ont collaboré dans le cadre de ce travail de thèse avec le soutien de la Région Île-de-France afin de développer un modèle de simulation au sein de la plate-forme logicielle CIVA, adapté à ce type de configuration, pour la mise au point de méthodes de contrôle, leurs optimisations et leurs qualifications. L approche théorique choisie est le formalisme d équations intégrales de volume ; une des clés de voûte de cette méthode est l expression analytique des dyades de Green découlant des équations de Maxwell et leur mise en oeuvre numérique, ce qui permet une grande rapidité de résolution. L établissement d un modèle pour le contrôle par courants de Foucault de structures rivetées a nécessité tout d abord le développement d un modèle de contrôle d une structure stratifiée grâce à la mise en place des dyades de Green multi-couches. Ce modèle a été par la suite enrichi d un point de vue numérique, notamment par la mise en place d un algorithme itératif adapté à nos configurations de contrôle. Enfin, la prise en compte par le modèle d un défaut en pied de rivet met en jeu la présence de deux objets de tailles très différentes dans une même configuration. Le modèle a ensuite fait l objet de validations expérimentales et de comparaisons avec d autres modèles de simulation (éléments finis, semi-analytique et formulation potentielle) aux différentes étapes clefs de son élaboration.
Inorganic fractions in extracellular polymeric substance extracted from activated sludge and biofilm samples by different methods (2012)

This study highlighted the inorganic fractions in the extracellular polymeric substance (EPS) extract from two activated sludges and one biofilm. Nine EPS extraction methods (centrifugation, sonication, cation exchange resin (CER) + sonication, CER, heating, formaldehyde + heating, formaldehyde + NaOH, ethanol and EDTA) were used in the study. The EPS extracts had large inorganic fractions, which ranged from 28% to 94% of the EPS dry weight. The EPS inorganic fraction was dependent on the source of the sludge and wastewater, the kinds of bacteria and the extraction method. The EPS extracts obtained by heating and sonication had smaller inorganic fractions than those obtained by centrifugation. The compositions of the inorganic fraction of EPS extracts obtained with CER and sonication + CER showed similar trends. The chemical extraction methods could contaminate the inorganic composition of EPS extracts by impurities, carrying over of the extractant itself or by changing the pH of the solution. Ethanol was the most effective extractant for obtaining inorganic ions.
Force control without force sensor based on mixed sensitivity H/sup infinity / design method (2003)

The authors propose the force control of a robot manipulator without a force sensor. The proposed force control system is realized by both the acceleration controller and the force observer. Both systems are designed by the mixed-sensitivity H/sup infinity / design method. The acceleration controller regulates the actuator of the robot manipulator by the acceleration control command. The force observer estimates the reaction force from the target environment. The experimental results showed that the response of the proposed force control system without a force sensor coincided with that of the force control system with a force sensor.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
HiFi-MBQC High Fidelitiy Measurement-Based Quantum Computing using Superconducting Detectors (2016)

The major achievement of this grant was the construction and setup of an array of superconducting nanowire single photondetectors SNSPDs which allowed support of quantum photonics experiments leading to 14 peer-reviewed publications.We installed and tested several SNSPDs in various configurations, moving toward four-element four detectors per spotassemblies achievable in the next year or so. Detector efficiencies varied from 70 to 90 , close to the current worldrecord of 93 at the target wavelength of 1.5 um. Experiments supported include first demonstration of blind quantum computing, experimental verification of quantum computers, experimental boson sampling, and several other areas.
Active Visual SLAM with Independently Rotating Camera (2021)

In active Visual-SLAM (V-SLAM), a robot relies on the information retrieved by its cameras to control its own movements for autonomous mapping of the environment. Cameras are usually statically linked to the robot’s body, limiting the extra degrees of freedom for visual information acquisition. In this work, we overcome the aforementioned problem by introducing and leveraging an independently rotating camera on the robot base. This enables us to continuously control the heading of the camera, obtaining the desired optimal orientation for active V-SLAM, without rotating the robot itself. However, this additional degree of freedom introduces additional estimation uncertainties, which need to be accounted for. We do this by extending our robot’s state estimate to include the camera state and jointly estimate the uncertainties. We develop our method based on a state-of-the-art active V-SLAM approach for omnidirectional robots and evaluate it through rigorous simulation and real robot experiments. We obtain more accurate maps, with lower energy consumption, while maintaining the benefits of the active approach with respect to the baseline. We also demonstrate how our method easily generalizes to other non-omnidirectional robotic platforms, which was a limitation of the previous approach. Code and implementation details are provided as open-source.
Zonder slag of stoot: de verovering van Babylonië door Cyrus II de Grote (539 v. Chr.) (2003)

Cet article fait le rapport de la conquete de Babylone par Cyrus le Grand en 539 av. J.-C. et presente les sources principales sur cette conquete.
Dosimetric properties in Cu-doped silica glasses synthesized by the spark plasma sintering method (2021)

We synthesized SiO2 glasses doped with various concentrations of Cu (0.001, 0.005, 0.01, and 0.05 mol %) by the spark plasma sintering (SPS) method, and investigated optical, scintillation, and dosimetric properties. The Cu-doped samples indicated photoluminescence (PL) due to the 3d10–3d94s1 transition of Cu+ at around 500 nm under an excitation at 270 nm. The 0.005 % Cu-doped sample showed the highest PL quantum yield (QY) among the present samples, and the QY was 34 %. The decay time constants ascribed to the PL from Cu+ were 47–52 and 121–124 µs. The scintillation and thermally-stimulated luminescence (TSL) peaks were observed to be due to Cu+ as well as PL. The TSL glow curves of all the samples showed two glow peaks around 130 and 300 °C. In TSL dose response functions, the 0.005 and 0.01 % Cu-doped samples showed detection limit of 0.1 mGy.
HEVC-based scanned document compression (2012)

This paper proposes a hybrid pattern matching/transform-based compression engine for scanned compound documents. The novelty of this approach is demonstrated by using a modified version of the HEVC (High Efficiency Video Coding) Test Model as a compound document compressor, here conveniently referred to as HEDC (High Efficiency Document Coder). The proposed method uses segments of a document to create a video sequence, which is then encoded by HEDC. The idea is to explore interframe prediction as a pattern matching algorithm for coding units pre-classified as text; and intraframe prediction for coding units pre-classified as image. Results show that HEDC outperforms AVC-I, HEVC-I (H.264/AVC and HEVC operating in pure intra mode), H.264/AVC and JPEG2000 by up to 3.3, 2.5, 1.7 and 5 dB, respectively. Furthermore, for most documents the proposed method yields practically the same rate-distortion performance as regular HEVC, but is approximately 5% to 20% faster due to a pre-classification algorithm that prevents it of performing all possible inter/intra prediction tests for each prediction unit.
Hereditary Pancreatic Cancer: Part I. The Genetic Profile (1997)

Adenocarcinoma of the pancreas is the fifth leading cause of cancer death in the United States.[1] It has a lifetime incidence of approximately one in 150 persons in the United States and a male-to-female ratio of approximately 1.3 to 1.[2]
Impact of Density Discontinuities on the Resonance Frequency of Helmholtz Resonators (2015)

A Helmholtz resonator is an important passive control device to abate excessive sound pressure levels. Because of its effectiveness and simplicity (in principle, it consists of an arbitrarily shaped volume and a small duct), it is of high relevance for industrial applications relying on robustness, availability, and reliability. It is the method of choice to counteract high-amplitude combustion-induced pressure oscillations often exhibited in lean premixed gas turbine combustors. Traditional Helmholtz resonators feature an efficient damping performance only in a narrow frequency bandwidth. To derive an efficient design for the full-scale engine, it is key to accurately predict its resonance frequency. In addition to the geometrical dimensions and the speed of sound, this is a function of a length correction term that accounts for inertia effects of the oscillating fluid. In case the Helmholtz resonator is connected to an enclosure of equal density, several empirical correlations for this correction term are available in the literature. However, if density differences between resonator and enclosure exist, as is the case for gas turbine combustion or acoustic liners in aeroengines, the end correction is affected. To the knowledge of the authors, the influence of nonisopycnic conditions on the length correction was not systematically investigated before. In this work, dedicated cold-flow experiments featuring density differences are conducted to investigate this phenomenon, and a density-dependent correction term is derived. A wide range of different densities are realized by blending air and krypton.
Plasmid copy number mutation in repA gene encoding RepA replication initiator of cryptic plasmid pHM1519 in Corynebacterium glutamicum (2018)

Cryptic plasmid pHM1519 is a rolling-circular replication mode plasmid of the pCG1 plasmid family in coryneform bacteria. The derived shuttle vector pPK4 is maintained at about 40-50 copies per chromosome in Corynebacterium glutamicum 2256 (ATCC 13869). We found that a mutation (designated copA1) within the repA gene encoding essential initiator protein RepA of the pHM1519-replicon increased the copy number of the mutant plasmid to about 800 copies per chromosome. The mutation was a single G to A base transition, which changed Gly to Glu at position 429 of the amino acid sequence of RepA. In silico secondary structure prediction of RepA suggested that Gly429 is situated in a disordered region in a helix-turn-helix motif, which is a typical DNA-binding domain. This study shows the first example of a high copy number of a C. glutamicum cryptic plasmid caused by an altered replication initiator protein.
Two-dimensional Green’s function theory for the electrodynamics of a rotating medium (2006)

We derive an exact spectral representation for the Green's function of Maxwell equations in a two-dimensional homogeneous and rotating environment. The formulation is developed in the medium (noninertial) rest frame, and it represents the response to a point source, where both the source and observation points rotate together with the medium. The closed form expression for the Green's function is derived for (nonrelativistic) slowly rotating media at finite distances. An approximate expression for the efficient evaluation of the Green's function, that avoids laborious summation of rotating-medium spherical harmonics, is provided and tested against the exact expression. Furthermore, it is shown that our spectral theory can provide a broad view of the optical response of rotating systems, from which the classical Sagnac effect is obtained as a special case.
High Surface Area Carbon Fiber Supercapacitor Electrodes Derived from an In Situ Porogen Containing Terpolymer: Poly(acrylonitrile-co-1-vinylimidazole-co-itaconic Acid) (2021)

Despite having an inherently low surface area upon carbonization, polyacrylonitrile (PAN) remains one of the more widely studied precursor polymers for making high-performance carbon fibers (CFs) for supercapacitors because of its electrospinnability and high carbon yield. Copolymerization with vinylimidazole (VIM) or acidic monomers such as itaconic acid (IA) comprises an attractive approach to modify the properties of PAN-based fibers to enhance their electrochemical performance. In this study, a terpolymer, poly(acrylonitrile-co-1-vinylimidazole-co-itaconic acid) (P(AN-co-VIM-co-IA)), was synthesized with different ratios of AN with VIM and/or IA monomers to develop CF precursors for supercapacitor applications. Here, IA serves as an in situ porogen that releases CO2 during the carbonization process to increase the surface area and tailor the pore sizes. VIM moieties disrupt the strong dipole–dipole interactions between nitrile groups in pure PAN, thus facilitating the processability and thermal stabilization of PAN. Benefiting from the above modifications, the resulting CFs of terpolymers exhibited higher specific surface areas and superior electrochemical performances and long-term stability compared to PAN or corresponding copolymers of P(AN-co-VIM) or P(AN-co-IA). The terpolymer with 5 wt % of VIM and 23 wt % of IA shows the highest capacitance of 97.0 F g–1 (10 mV s–1) with an energy density of 49 Wh kg–1 at 10 kW kg–1 upon carbonization, which was enhanced to 136.7 F g–1 (10 mV s–1) and 79 Wh kg–1 at 10 kW kg–1 upon activation with CO2.
Tiller Contributions to Low-Density Corn Biomass and Yield (2020)

Tillers (commonly termed “suckers”) have lower overall yield contributions in corn (Zea mays L.) than in other Poaceae species. Current research evaluating the value of tillers in corn is scarce, particularly under water-limited conditions. This study aims to quantify relationships between tiller, main plant, and full (considering both tiller and main plant fractions) plant aboveground biomass and yields of corn under low plant density scenarios. Experiments were conducted in the 2019 growing season at three sites across Kansas (Garden City, Goodland, and Manhattan) evaluating two tiller-prone corn hybrids common in this region (P0805AM and P0657AM) at two plant densities (10,000 and 17,000 plants/a) with tiller maintenance (YT) or tiller removal (NT) at the V10 growth stage (tenth leaf). Treatments were set in a split-split-plot under a randomized complete block design (RCBD) with three replications. Results showed that full shoot dry biomass at maturity was neutrally or positively influenced by both tiller presence and an increase in plant density. Although yield from ears on the main plant (herein termed as “main plant yields”) can be negatively impacted by tillers, full yield of all portions of the plant (herein “full plant yields”) were neutrally or positively influenced by tiller contributions. Tiller yield variation in this study was influenced by tiller reproductive development, specifically tassel and lateral ear types. Responsible mechanisms and environmental factors influencing these development processes remain largely unknown, and this will be the focus of continuing studies.
APRNet: Attention-based Pixel-wise Rendering Network for Photo-Realistic Text Image Generation (2022)

Style-guided text image generation tries to synthesize text image by imitating reference image's appearance while keeping text content unaltered. The text image appearance includes many aspects. In this paper, we focus on transferring style image's background and foreground color patterns to the content image to generate photo-realistic text image. To achieve this goal, we propose 1) a content-style cross attention based pixel sampling approach to roughly mimicking the style text image's background; 2) a pixel-wise style modulation technique to transfer varying color patterns of the style image to the content image spatial-adaptively; 3) a cross attention based multi-scale style fusion approach to solving text foreground misalignment issue between style and content images; 4) an image patch shuffling strategy to create style, content and ground truth image tuples for training. Experimental results on Chinese handwriting text image synthesis with SCUT-HCCDoc and CASIA-OLHWDB datasets demonstrate that the proposed method can improve the quality of synthetic text images and make them more photo-realistic.
Functionally‐modified egg white albumen hydrogels (2004)

Abstract Hydrogels were prepared by using egg white albumen (EWA) before and after chemical modification of its lysyl residues with ethylenediamine tetraacetic dianhydride (EDTAD) to incorporate carboxylic groups. This resulted in an increase in swelling ratio of the EWA hydrogels. The swelling ratio increased dramatically in deionized water substantially, more than in pH 7.4 buffer solution. The effects of medium pH, temperature and swelling were investigated, along with crosslinking of the gel network by glutaraldehyde (GLA), as well as acetone treatment. The gels denatured by acetone showed an insignificant increase in swelling ratio for the gels crosslinked with GLA during gel preparation, which is in contrast to the gels crosslinked subsequent to gel formation. The swelling behavior was positively affected by temperature and time. However, an insignificant effect of pH was observed due to electrostatic screening of the carboxylic groups by sodium ions in the buffer solution. Availability of various functional groups on EWA has resulted in adsorption of metals (Cu +2 ions) and non‐metals (PO 4 −2 anions). Copyright © 2004 Society of Chemical Industry
Advanced Substrates for GaN-Based Power Devices (2019)

In this paper, we present an approach to enhance thermal dissipation of GaN on silicon high electron mobility transistors (HEMTs) and Schottky barrier diodes (SBDs). The initial silicon substrate was removed and replaced by a copper substrate using a transfer process based on polymer bonding to a temporary wafer. Electrical and thermal characterizations were performed to study the impact of the transfer. The thermal measurements showed a lower temperature for the HEMTs transferred onto a copper substrate in the case of a 1 ms pulse at 0.34 W/mm.
Reliability Based Design of Composite Over-Wrapped Tanks (2007)

&lt;div class="htmlview paragraph"&gt;Filament wound composite over-wrapped tanks are considered for applications in solid rockets motor cases. An analytical procedure is developed, in form of a computer code (GENOA), to assess the durability and damage tolerance of pressurized tanks. The winding simulation calculates thickness and ply angle distributions and residual stresses resulting from the wrapping of the tanks. The durability evaluation predicts micro-crack formation, delamination initiation and progression, failure modes and burst (fracture) loads. Deterministic simulation resulted in burst pressures that are within 8.8% of the test. The pressurized tanks are also evaluated in presence of uncertainties in constituent stiffness and strength and manufacturing variables. Based on assumed scatter, the probability that the tank burst pressure lies within the test range is 27.5%. The sensitivity analysis indicated that fiber misalignment and ply thickness are the most influential variables that affect the burst pressure.&lt;/div&gt;
A new GRIN lens design paradigm based on wavefront matching (2016)

GRadient INdex (GRIN) optics has revolutionized the field of lens design by providing an unparalleled amount of design freedom, resulting in high-performance optical systems. Unfortunately, this design freedom leads to a large number of parameters in multi-element systems, since the GRIN distributions need to be described in addition to the lens geometries. This can lead to slow convergence and stagnation for even the most robust numerical optimizers. This paper proposes a modular, black-box design paradigm which allows for the optimization of each element in the system independently. This leads to an efficient strategy to design all-GRIN systems from scratch, or to replace existing homogeneous doublets and triplets in a system with GRIN singlets.
Porous silicon–graphene oxide core–shell nanoparticles for targeted delivery of siRNA to the injured brain (2016)

We report the synthesis, characterization, and assessment of a nanoparticle-based RNAi delivery platform that protects siRNA payloads against nuclease-induced degradation and efficiently delivers them to target cells. The nanocarrier is based on biodegradable mesoporous silicon nanoparticles (pSiNPs), where the voids of the nanoparticles are loaded with siRNA and the nanoparticles are encapsulated with graphene oxide nanosheets (GO-pSiNPs). The graphene oxide encapsulant delays release of the oligonucleotide payloads <i>in vitro</i> by a factor of 3. When conjugated to a targeting peptide derived from the rabies virus glycoprotein (RVG), the nanoparticles show 2-fold greater cellular uptake and gene silencing. Intravenous administration of the nanoparticles into brain-injured mice results in substantial accumulation specifically at the site of injury.
Chemistry and Mechanism of Alkene Polymerization Reactions with Metallocene Catalysts (2009)

Abstract The structures of oligomers formed in ethylene polymerization reactions catalyzed by metallocene complexes are described. Ethylene was homopolymerized and copolymerized with four 1‐alkenes—propene, hex‐1‐ene, hept‐1‐ene, and 3,3‐dimethylbut‐1‐ene—using as catalysts ( n ‐Bu‐Cp) 2 ZrCl 2 and (Me‐Cp) 2 ZrCl 2 complexes activated with MAO, both in the absence and in the presence of H 2 . Oligomers generated in these reactions are the low molecular weight “tails” of the molecular weight distributions of the respective homopolymers and copolymers. GC analysis affords structural identification of each polymer molecule, albeit a very short one, individually. Analysis of the co‐oligomer structures provides explicit confirmation of the standard mechanisms and kinetics of chain growth and chain transfer reactions. The kinetic features include primary and secondary insertion reactions of 1‐alkene molecules into Cp 2 ZrC and Cp 2 ZrH bonds, chain transfer reactions to AlMe 3 , independence of chain growth rate constants on the size of polymer chains attached to active centers, etc. GC analysis also yields detailed information on an unusual feature of metallocene catalysis, namely the formation of saturated macromolecules in ethylene polymerization reactions performed in the absence of H 2 . magnified image
ChemInform Abstract: Some Aspects of Radical Chemistry in the Assembly of Complex Molecular Architectures (2013)

Abstract Review: 73 refs.
ChemInform Abstract: Studies Directed Towards the Total Synthesis of (.+‐.)‐Himbacine. (1996)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Space-time block coding for uplink cyclic-prefix CDMA (2005)

info:eu-repo/semantics/published