gebhart/patrepeval huggingface dataset:
Modelling and analysis of the distortion of strongly‐coupled wireless power transfer systems with SS and LCC–LCC compensations (2019)

Accurate modelling is necessary for designing a wireless power transfer (WPT) system and currently, first harmonic approximation (FHA) is widely used. However, it is not accurate for WPT systems with a strong coupling, such as fast charging of electric vehicles with a coupling coefficient of 0.80, compared to the conventional wireless charging with a coupling coefficient of 0.15–0.30. This study develops accurate models for WPT systems with series–series (SS) and LCC–LCC compensations. For the SS compensation with a strong coupling, the transmitter and receiver currents are distorted, leading to much larger values than the estimations from FHA, which determines the selection of power switches and resonant capacitors. For the LCC–LCC compensation, the transmission coil currents are only highly distorted with rich third‐order harmonics at the vicinity of the 0.889 coupling coefficient, leading to low efficiency and large coil current ratings. For the experimental prototype, the efficiency drop can be over 3%, which is significant, especially for high‐power systems. The WPT system with the LCC–LCC compensation should avoid operation in the vicinity of this particular coupling coefficient. Furthermore, experiments are conducted, and the results perfectly match the calculations, demonstrating the accuracy of the proposed models.
Autocalibration and Uncalibrated Reconstruction of Shape from Defocus (2007)

Most algorithms for reconstructing shape from defocus assume that the images are obtained with a camera that has been previously calibrated so that the aperture, focal plane, and focal length are known. In this manuscript we characterize the set of scenes that can be reconstructed from defocused images regardless of calibration parameters. In lack of knowledge about the camera or about the scene, reconstruction is possible only up to an equivalence class that is described analytically. When weak knowledge about the scene is available, however, we show how it can be exploited in order to auto-calibrate the imaging device. This includes imaging a slanted plane or generic assumptions on the restoration of the deblurred images.
Long Time Oxidation Study of Ti[sub 3]SiC[sub 2], Ti[sub 3]SiC[sub 2]/SiC, and Ti[sub 3]SiC[sub 2]/TiC Composites in Air (2003)

We report herein on the oxidation kinetics and morphology of the oxide phases that form after long term (up to 1500 h) oxidation in ambient air of fine and coarse-grained samples of with 30 vol % TiC and with 30 vol % SiC in the 875-1200°C temperature range. In all cases, the oxidation resulted in a duplex scale, an outer rutile and an inner rutile/silica layer. At 875°C, and up to at least 100 h, the oxidation kinetics of the TiC samples are parabolic; at 925°C, the oxidation kinetics of the SiC are subparabolic, up to at least 500 h. The oxidation kinetics of all other runs are initially parabolic, but at times >30 h they become linear. The reason for the transition is not entirely clear, but could be due to the buildup of stresses in the external oxide scales. Comparison with previously published results indicate that the rate limiting step, when the oxidation kinetics are parabolic, is most probably the inward diffusion of oxygen and the simultaneous outward diffusion of titanium. The results also strongly suggest that the activation energies for diffusion of oxygen and titanium in rutile are almost identical over at least the 1000-1200°C temperature range. © 2003 The Electrochemical Society. All rights reserved.
Plasma-parameter dependence of thin-oxide damage from wafer charging during electron-cyclotron-resonance plasma processing (1997)

In this work, the effects of plasma-parameter variations on the charging damage of polysilicon-gate MOS capacitor test structures exposed to O/sub 2/ electron-cyclotron-resonance (ECR) plasmas are investigated. The results show that charging damage is generated when large potential differences exist across the gate-oxide layers of the MOS capacitor test structures and that these potential differences can only occur in the presence of plasma nonuniformities. These results demonstrate the critical need for plasma uniformity during processing, in particular as device dimensions shrink and gate-oxide thicknesses decrease. The plasma parameters were varied by adjusting the neutral gas pressure and by independently biasing a circular grid and a ring electrode located above the wafer. The damage induced in the test wafers during the plasma exposure was characterized with ramp-voltage breakdown measurements. Radial profiles of the floating potential measured with a Langmuir probe were found to vary nonuniformly when the grid electrode was positively biased due to preferential depletion of electrons relative to ions beneath the grid electrode. An equivalent-circuit model of the test wafer and the wafer-stage electrode predicts that the silicon substrate acquires a potential equal to the average of the wafer surface potential. Comparisons of the calculated profiles of the potential difference across the gate-oxide layers of the test structures and whole-wafer maps of the breakdown-voltage measurements show that the majority of the damage occurs where the oxide potential difference is largest and that the damage only occurs in the presence of plasma nonuniformities.
Synthesis and Characterisation of CeO2 Coatings on the AZ31 Alloy for Corrosion Protection and In Vitro Biocompatibility of MC3T3-E1 Pre-Osteoblasts (2023)

The use of bioabsorbable metals as temporary medical implants has attracted considerable research interest as they do not require a second surgical operation for removal after the healing process is completed. However, magnesium (Mg) and its alloys have a degradation rate that is too high in biological environments. Therefore, it must be controlled using various strategies. In this study, an AZ31-Mg-based alloy coated with CeO2 is investigated to analyse the effect of the coating on its corrosion protection and biocompatibility. The AZ31 alloy is anodised with NaOH solution, before coating to stabilise the alloy surface. The CeO2 coating is deposited on anodised AZ31 by chemical conversion treatment. The electrochemical properties of samples are evaluated using electrochemical impedance spectroscopy and cyclic polarisation curves using Hank’s solution. Structural and morphological characterisation of the samples are performed using X-ray diffraction and scanning electron microscopy–energy dispersive X-ray spectroscopy. Additionally, biocompatibility is determined by live/dead assay using MC3T3-E1 pre-osteoblasts. The preliminary results indicate that CeO2 coatings exhibit higher electrochemical properties. Additionally, an increase in the ratio of live/dead cells of the AZ31OH-CeO2 surface is detected, in contrast with AZ31, thus indicating improvement in biocompatibility upon CeO2 coating.
SU-FF-T-152: Development of a Variable-Aperture Collimator for Small Animal Radiation Therapy (2007)

Purpose: An automatic variable-aperture collimator has been developed to use a diagnostic animal CT for small animal radiation therapy. This system, together with a 3D translation bed stage, will enable the application of advanced clinical radiotherapy techniques to animal models of disease. Method and Materials: The collimator is mounted on the gantry of a GE RS120 microCT scanner (GE Medical Systems, Milwaukee, WI), between the x-ray source and the bore. It consists of two stages offset by 30°, each with 6 trapezoidal brass blocks moving along a hexagonal frame, pushed by 3 slots on a rotational driving plate to create hexagonal openings. The openings of the two stages always form a constant ratio, to fit with the microCT x-ray beam divergence. The collimator axis to x-ray beam alignment has been assessed by imaging the aperture. An algorithm has been developed to measure the misalignment and to guide the collimator position adjustment. The torques required to drive the two stages were measured by a torquemeter during the design. Results: Geometric analyses and direct measurement demonstrated that the projected aperture on the isocenter plane is 3.5 mm/degree of driving plate rotation. The collimator can provide 98% of attenuation for 120 keV photons, sufficient for therapeutic narrow beam generations. The collimator-beam alignment can be adjusted to better than 0.2 mm, compared with the 0.3-mm source spot size. With the designed ratio of the openings, a regular dodecagonal aperture is formed from the source view. The measured torque to open and close a stage ranges from 1 to 5 N-m. A 30-N-m driving motor has been selected accordingly. Conclusion: A variable-aperture collimator has been constructed. Using a commercial animal CT one can deliver narrow beam x-ray to experimental animals, so that advanced clinical radiation therapy techniques can be applied in pre-clinical research.
Comparison of Macitentan and Bosentan on Right Ventricular Remodeling in a Rat Model of Non-vasoreactive Pulmonary Hypertension (2015)

Macitentan was more efficacious than bosentan in preventing the development of pulmonary and RV hypertrophies in a model of non-vasoreactive PH. Greater ability to distribute into the tissue could contribute to the greater structural improvement by macitentan compared with bosentan.
Fine Mapping of Chromosome 6q23-25 Region in Familial Lung Cancer Families Reveals RGS17 as a Likely Candidate Gene (2009)

RGS17 is a major candidate for the familial lung cancer susceptibility locus on chromosome 6q23-25.
Latency-Driven Transport for 5G (2018)

A transport network is a key component for enabling future fifth-generation (5G) network deployments. The transport network will be under demand to support current and future radio access technologies (RATs), along with the various schemes for splitting radio functions, that should be supported with statistical multiplexing strategies compatible with the tight requirements of latency and bandwidth expected in 5G. In this paper, a different perspective is considered with respect to the conventional method proposed in the literature, where transport design is largely based on some radio design parameters that are vendor specific. This paper, applied to a network architecture named eXHaul, proposes a novel strategy for consistent bandwidth savings in the transport segment considering both the limitations of the optical transmission technology and the radio design requirements in a set of scenarios that vary in terms of distance between the antenna site and the baseband site, rate of the transport channels, end-to-end latency imposed by radio needs, and radio time transmission interval. The deployment in a real scenario, provided by Telefonica and referring to the urban area of Tijuana (Mexico), has also been evaluated to provide an indication in a real case.
A Model-Based Processor Design for Smart Microsensor Arrays (2007)

Smart sensors with embedded processors offer unique advantages for applications that must gather large amounts of data and continuously monitor evolving conditions for potential changes (as in machine condition monitoring) or potential threats (as in biological, chemical, or nuclear monitoring). Unfortunately, nonparametric or parametric processing techniques do not capture the true essence of the problem physics to extract the desired information, detect the change, or monitor the environment for threats. Moreover, the underlying phenomenology governing the propagation physics is usually quite complex and nonlinear. Therefore, coupling a nonlinear processor that models the propagation process to the sensor performing the measurement has been considered unrealistic until recently, when high-speed microcomputer chips that can easily be incorporated into the sensor design became available. In this article, we discuss the design of a smart-physics-based processor for microcantilever sensor arrays. The processor is coupled to a microelectromechanical sensor and estimates the presence of critical materials or chemicals in solution. We first briefly present microcantilever sensors and then discuss the microcantilever sensor array design, which consists of the cantilever physics propagation model, cantilever array measurement model, model-based parameter estimator design, and model-based processor (MBP) design. Finally, we end with experimental results and conclusions. MICROCANTILEVER SENSORS Microcantilevers are powerful transducers for sensing inorganic, organic, and biological molecules since they readily bend or deflect in the presence of a very small number of target molecules (nanomolar to femtomolar concentrations) [1]. The number of potential target chemicals is large, ranging from DNA [2] to explosives [3], implying that these sensors may be useful in defense, medicine, drug discovery, and environmental monitoring. Microcantilevers are capable of recognizing antibodies [4] and nerve agent products (hydrofluoric acid) in solution [5]. Let us assume a microcantilever array illustrated in Figure 1(a). (The levers are the thin rectangular strips.) The dynamics of the fluids flowing over the array are influenced by two major factors: temperature and flow. The temperature depends on many variables, and the interaction dynamics of the molecules in solution are relatively slow, creating a disturbance to the cantilever sensor system in equilibrium. Flow in the medium associated with the array induces a stress along with the chemical forces created by the molecules bonding with the functionalized levers (i.e., in which material sensitive to these molecules has already been deposited) leading to the measured deflection. Micromachined cantilevers can function as detection devices when one side is fabricated to be chemically distinct from the other. Functionalization can be accomplished, for example, by evaporating a thin (∼10s of nm) film of metal such as gold on the top of the chip, then immersing the cantilever chip in a
Reliability through relay selection in cooperative networks (2011)

This chapter first presents an overview of the possible signaling techniques in relay networks. The differences between the formation of the signals of the relays, network performance, and complexity are highlighted. Then, the problem of relay selection is reviewed and key factors in the design of relay selection schemes are described. Finally, as a case study, the details of one exemplary relay selection protocol are presented.
Copeptin in the Differential Diagnosis of the Polydipsia-Polyuria Syndrome—Revisiting the Direct and Indirect Water Deprivation Tests (2011)

Copeptin holds promise as a diagnostic tool in the polyuria-polydipsia syndrome, improving significantly the diagnostic accuracy of the direct WDT.
Gas-phase ion-molecule charge-exchange reactions of iron(1+) with iron pentacarbonyl: observation of higher lying metastable electronic states (1992)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGas-phase ion-molecule charge-exchange reactions of iron(1+) with iron pentacarbonyl: observation of higher lying metastable electronic statesJ. V. B. Oriedo and D. H. RussellCite this: J. Phys. Chem. 1992, 96, 13, 5314–5319Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published inissue 1 June 1992https://pubs.acs.org/doi/10.1021/j100192a026https://doi.org/10.1021/j100192a026research-articleACS PublicationsRequest reuse permissionsArticle Views36Altmetric-Citations21LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts
Wi-Fi-based sensing for gesture control applications (2019)

This chapter introduces a Wi-Fi-based sensing technology that is able to detect and recognize hand gestures with Wi-Fi signals. It covers the underlying theory and state-of-the-art sensor systems. It also demonstrates several gesture control applications with the additional use of machine learning and sensor fusion techniques.
Efficient Space Skipping and Adaptive Sampling of Unstructured Volumes\n Using Hardware Accelerated Ray Tracing (2019)

Sample based ray marching is an effective method for direct volume rendering\nof unstructured meshes. However, sampling such meshes remains expensive, and\nstrategies to reduce the number of samples taken have received relatively\nlittle attention. In this paper, we introduce a method for rendering\nunstructured meshes using a combination of a coarse spatial acceleration\nstructure and hardware-accelerated ray tracing. Our approach enables efficient\nempty space skipping and adaptive sampling of unstructured meshes, and\noutperforms a reference ray marcher by up to 7x.\n
Selective Heat Insulation of Combustion Chamber Walls for a DI Diesel Engine with Monolithic Ceramics (1989)

&lt;div class="htmlview paragraph"&gt;The engine performance and emissions characteristics of a single-cylinder DI diesel engine were experimentally investigated. The combustion chamber walls of the engine were thermally insulated with ceramic materials of SSN (Sintered Silicon Nitride) and PSZ (Partially Stabilized Zirconia). Fuel economy and emissions characteristics were improved by insulating selected locations of the combustion chamber walls. The selective insulation helped to create activated diffusion combustion and resulted in more efficient use of the intake air.&lt;/div&gt;
Closed-Form Global Optimization of Beyond Diagonal Reconfigurable Intelligent Surfaces (2022)

Reconfigurable intelligent surfaces (RISs) allow controlling the propagation environment in wireless networks by tuning multiple reflecting elements. RISs have been traditionally realized through single connected architectures, mathematically characterized by a diagonal scattering matrix. Recently, beyond diagonal RISs (BD-RISs) have been proposed as a novel branch of RISs whose scattering matrix is not limited to be diagonal, which creates new benefits and opportunities for RISs. Efficient BD-RIS architectures have been realized based on group and fully connected reconfigurable impedance networks. However, a closed-form solution for the global optimal scattering matrix of these architectures is not yet available. In this paper, we provide such a closed-form solution proving that the theoretical performance upper bounds can be exactly achieved for any channel realization. We first consider the received signal power maximization in single-user single-input single-output (SISO) systems aided by a BD-RIS working in reflective or transmissive mode. Then, we extend our solution to single-user multiple-input multiple-output (MIMO) and multi-user multiple-input single-output (MISO) systems. We show that our algorithm is less complex than the iterative optimization algorithms employed in the previous literature. The complexity of our algorithm grows linearly (resp. cubically) with the number of RIS elements in the case of group (resp. fully) connected architectures.
Virtual team user environments - a step from tele-cubicles towards distributed tele-collaboration in mediated workspaces (2003)

We introduce a new concept of an immersive 3D video-conference system and immersive tele-collaboration. Based on the principle of a shared virtual table environment (SVTE), the key features of the new system concept are explained and compared to the other SVTE approaches like tele-cubicles. Furthermore we present a complete system architecture based on MPEG-4 technology and discuss first implementations.
Development of Low Resistance Al/Ti Stacked Metal Contacts to p-Type 4H-SiC (2007)

In this work, we have investigated triple and innovative multiple stacked contacts onto ptype SiC in order to evaluate whether or not there is any improvement in morphology or specific contact resistivity. The stacked metal contacts are based on Al, Ti and Ni with the specific contact resistivity measured at a low value of 5.02×10-6'cm2 for an Al(100 nm)/Ti(100 nm)/Al(10 nm) (where a “/” indicates the deposition sequence) triple stacked metal contact. XRD microstructural analysis and SEM measurements have been carried out and it has been discovered that the contacts, which formed the compound Ti3SiC2 at the metal/SiC interface, more readily display low-resistance ohmic characteristics after a post deposition anneal. Although the same amount of Ti (100 nm in total) has been deposited closer to the metal/SiC interface, none of the multiple stacked structures displayed ohmic behaviour after a post deposition anneal.
Isolation of Brassins by Extraction of Rape (Brassica napus L.) Pollen (1978)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsolation of Brassins by Extraction of Rape (Brassica napus L.) PollenN. Mandava, M. Kozempel, J. F. Worley, D. Matthees, J. D. Warthen Jr., M. Jacobson, G. L. Steffens, H. Kenney, and M. D. GroveCite this: Ind. Eng. Chem. Prod. Res. Dev. 1978, 17, 4, 351–354Publication Date (Print):December 1, 1978Publication History Published online1 May 2002Published inissue 1 December 1978https://pubs.acs.org/doi/10.1021/i360068a013https://doi.org/10.1021/i360068a013research-articleACS PublicationsRequest reuse permissionsArticle Views135Altmetric-Citations15LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts
Field trial of automatic bias control scheme for optical IQ modulator and demodulator with directly detected 112 Gb/s DQPSK Signal (2013)

When optical transceivers employing in-phase and quadrature (IQ) modulators and demodulator are used in real transmission systems, it is very important to search optimum bias points and to prevent bias drift from their optimal points due to of temperature variation, stress, or device aging. We demonstrate a simple and cost-effective automatic bias control scheme for optical IQ modulator and demodulator based on RF power and peak voltage detection. The principle of control scheme and effects of bias voltage on monitoring parameters are presented. The dynamic performance of the control scheme, effects of optical signal-to-noise ratio (OSNR) of signal, and effects of temperature variation are also evaluated. For the evaluation of bias control scheme at real-environment, we implement the automatic bias control scheme in 112 Gb/s dual carrier-differential QPSK (DC-DQPSK) transceiver, and investigate its long-term stability performances in a field transmission experiment over 797-km of installed fiber and ROADM.