gebhart/patrepeval huggingface dataset:
Wireless Power Transfer to Millimeter-Sized Nodes Using Airborne Ultrasound (2017)

We propose the use of airborne ultrasound for wireless power transfer to mm-sized nodes, with intended application in the next generation of the Internet of Things (IoT). We show through simulation that ultrasonic power transfer can deliver 50 [Formula: see text] to a mm-sized node 0.88 m away from a ~ 50-kHz, 25-cm<sup>2</sup> transmitter array, with the peak pressure remaining below recommended limits in air, and with load power increasing with transmitter area. We report wireless power recovery measurements with a precharged capacitive micromachined ultrasonic transducer, demonstrating a load power of 5 [Formula: see text] at a simulated distance of 1.05 m. We present aperture efficiency, dynamic range, and bias-free operation as key metrics for the comparison of transducers meant for wireless power recovery. We also argue that long-range wireless charging at the watt level is extremely challenging with existing technology and regulations. Finally, we compare our acoustic powering system with cutting edge electromagnetically powered nodes and show that ultrasound has many advantages over RF as a vehicle for power delivery. Our work sets the foundation for further research into ultrasonic wireless power transfer for the IoT.
Synthesis, crystal structure determination, DFT calculation, and Hirshfeld surface analysis of a new Zn(II) complex with the guaninium ligand (2020)

A new Zn(II) complex with the guaninium monodentate ligand, [ZnCl3(C5H6N5O)], has been synthesized in aqueous solution and studied by single-crystal X-ray diffraction, elemental analysis, CP-MAS-NMR, and IR spectroscopy. The Zn(II) atom is coordinated in a distorted tetrahedral fashion by three chloride anions and one nitrogen atom of the guaninium cation. The compound crystallizes in the monoclinic space group P21/n with lattice parameters a = 8.8411(7) Å, b = 11.7176(5) Å, c = 10.3765(8) Å, β = 100.069(4)°, V = 1058.41(13) Å3, and Z = 4. Intermolecular interactions were investigated by Hirshfeld surfaces. Besides the Zn(II) cation coordination, the crystal packing is stabilized by intermolecular N-H…O, N-H…Cl− and C-H…Cl− hydrogen bonds and C…C aromatic stacking which link the molecules into a three-dimensional network. The regions of strongest positive electrostatic on the Hirshfeld surface of guaninium ligand interact with electronegative atoms and vice versa. The 13C and 15N CP-MAS NMR spectra are discussed and the vibrational absorption bands were identified by infrared spectroscopy. The HOMO and LUMO energies and Molecular Electrostatic Potential surface were derived from DFT theoretical calculations.
Time Complexity of In-Memory Solution of Linear Systems (2020)

In-memory computing (IMC) with cross-point resistive memory arrays has been shown to accelerate data-centric computations, such as the training and inference of deep neural networks, due to the high parallelism endowed by physical rules in the electrical circuits. By connecting cross-point arrays with negative feedback amplifiers, it is possible to solve linear algebraic problems, such as linear systems and matrix eigenvectors in just one step. Based on the theory of feedback circuits, we study the dynamics of the solution of linear systems within a memory array, showing that the time complexity of the solution is free of any direct dependence on the problem size N, rather it is governed by the minimal eigenvalue of an associated matrix of the coefficient matrix. We show that when the linear system is modeled by a covariance matrix, the time complexity is O(logN) or O(1). In the case of sparse positive-definite linear systems, the time complexity is solely determined by the minimal eigenvalue of the coefficient matrix. These results demonstrate the high speed of the circuit for solving linear systems in a wide range of applications, thus supporting IMC as a strong candidate for future big data and machine learning accelerators.
A soy flour based thermoset resin without the use of any external crosslinker (2013)

In the current research a novel water based reaction scheme was developed to crosslink the protein from soy flour (SF) without using any external crosslinker. Soy flour, which contains about 55% protein and 32% carbohydrate and is the least expensive commercially available soy protein variety, was used for this research. Sugars and protein from SF were separated using a simple lab based filtration technique. The sugars were then oxidized using H2O2, a benign oxidizing agent, to obtain aldehyde and carboxyl groups. The oxidized sugars containing these groups were then used to crosslink the reactive groups present in the protein separated from SF, mainly utilizing Maillard type chemistry. The resulting crosslinked (thermosetting) soy protein resin had enhanced mechanical and thermal properties and reduced moisture absorption. When reinforced with strong microfibrillated cellulose they can produce fully sustainable and biodegradable green composites. The novel scheme developed here may be extended to prepare biobased plastics with enhanced properties by crosslinking natural flours with similar composition (soluble sugars and protein).
Malleable ⁄ Schemas: A Preliminary Report (2005)

Large-scale information integration, and in particular, search on the World Wide Web, is pushing the limits on the combination of structured data and unstructured data. By its very nature, as we combine a large number of information sources, our ability to model the domain in a completely structured way diminishes. We argue that in order to build applications that combine structured and unstructured data, there is a need for a new modeling tool. We consider the question of modeling an application domain whose data may be partially structured and partially unstructured. In particular, we are concerned with applications where the border between the structured and unstructured parts of the data is not well defined, not well known in advance, or may evolve over time. We propose the concept of malleable schemas as a modeling tool that enables incorporating both structured and unstructured data from the very beginning, and evolving one’s model as it becomes more structured. A malleable schema begins the same way as a traditional schema, but at certain points gradually becomes vague, and we use keywords to describe schema elements such as classes and properties. The important aspect of malleable schemas is that a modeler can capture the important aspects of the domain at modeling time without having to commit to a very strict schema. The vague parts of the schema can later evolve to have more structure, or can remain as such. Users can pose queries in which references to schema elements can be imprecise, and the query processor will consider closely related schema elements as well.
RECONSTRUCTION OF CHRONIC RUPTURES OF THE DISTAL BICEPS TENDON WITH USE OF AN ACHILLES TENDON ALLOGRAFT (2002)

Reconstruction of chronic disruptions of the distal biceps tendon with an Achilles tendon allograft appears to offer a satisfactory technical solution for this challenging problem and has provided satisfactory clinical results to date.
Welding Residual Stress in a Large Diameter Nuclear Reactor Pressure Vessel Nozzle (2012)

The Atucha II nuclear power plant is a pressurized heavy water reactor being constructed in Argentina. The original plant was designed by KWU in the 1970’s using the German methodology of break preclusion. The plant construction was halted for several decades, but a recent need for power was the driver for restarting the construction. Many times welding residual stresses in nuclear power plant can lead to cracking concerns. Hence, understanding the residual stress distribution is important to evaluate the reliability of pipe and nozzle joints with welds. In this paper, a large diameter Reactor Pressure Vessel (RPV) hot-leg nozzle was analyzed. This is a nozzle from Atucha II nuclear power plant in Argentina. The main weld material is 20MnMoNi55 and ID welded cladding is made of 309L. The special materials and weld geometry will lead to interesting welding residual stress field. In addition, post-weld heat treatment (PWHT) region and boundary conditions could also play an important role in determining welding residual stress fields. Sensitivity analyses were conducted and the technical observation and comments will conclude the paper.
Convenient synthesis of .alpha.-silyl esters (1967)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConvenient synthesis of .alpha.-silyl estersRalph J. Fessenden and Joan S. FessendenCite this: J. Org. Chem. 1967, 32, 11, 3535–3537Publication Date (Print):November 1, 1967Publication History Published online1 May 2002Published inissue 1 November 1967https://doi.org/10.1021/jo01286a054RIGHTS & PERMISSIONSArticle Views814Altmetric-Citations75LEARN 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 InReddit PDF (425 KB) Get e-Alertsclose Get e-Alerts
A critical role for AID in the initiation of reprogramming to induced pluripotent stem cells (2012)

Mechanistic insights into the reprogramming of fibroblasts to induced pluripotent stem cells (iPSCs) are limited, particularly for early acting molecular regulators. Here we use an acute loss of function approach to demonstrate that activation-induced deaminase (AID) activity is necessary for the initiation of reprogramming to iPSCs. While AID is well known for antibody diversification, it has also recently been shown to have a role in active DNA demethylation in reprogramming toward pluripotency and development. These findings suggested a potential role for AID in iPSC generation, yet, iPSC yield from AID-knockout mouse fibroblasts was similar to that of wild-type (WT) fibroblasts. We reasoned that an acute loss of AID function might reveal effects masked by compensatory mechanisms during development, as reported for other proteins. Accordingly, we induced an acute reduction (>50%) in AID levels using 4 different shRNAs and determined that reprogramming to iPSCs was significantly impaired by 79 ± 7%. The deaminase activity of AID was critical, as coexpression of WT but not a catalytic mutant AID rescued reprogramming. Notably, AID was required only during a 72-h time window at the onset of iPSC reprogramming. Our findings show a critical role for AID activity in the initiation of reprogramming to iPSCs.
Time Variability of the Geocoronal Solar Wind Charge Exchange in the Direction of the Celestial Equator (2010)

We report the detection of a time variable OVII line emission in a deep 100 ks Suzaku X-ray Imaging Spectrometer spectrum of the Galactic Ridge X-ray emission. The observed line intensity is too strong (11+/-2 line unit or photon cm^-2 s^-1 str^-1) to be emitted inside the heavily obscured Galactic disk. It showed a factor of two time variation which shows a significant (~4 sigma) correlation with the solar wind O^7+ ion flux. The high line intensity and the good time correlation with the solar wind strongly suggests that it originated from geocoronal solar wind charge exchange emission. We discuss the X-ray line intensity considering a line of sight direction and also theoretical distribution models of the neutral hydrogen and solar wind around the Earth. Our results indicate that X-ray observationsof geocoronal solar wind charge exchange emission can be used to constrain these models.
Oxygen Reduction Kinetics in Deuterated Phosphoric Acid (1985)

Donnees sur les etudes voltammetriques de la reduction d'oxygene dans H 3 PO 4 a 85%, deuterie ou non, a 25°C, en presence d'une electrode a disque tournant de platine
Tertiary‐butyl hydroquinone treatment for crude palm oils (1982)

Abstract Bleachability of crude palm oil was studied with respect to oxidation state of the oil at time of bleach, amount of bleaching clay needed, and the effects of an antioxidant treatment with tert‐butyl‐hydroquinone (TBHQ) on oxidation reactions. These studies confirm the adverse effects of oxidation on bleachability of palm oil and the effectiveness of TBHQ in preserving bleachability. Citric acid was shown to benefit only old oxidized oils. TBHQ was effective in the laboratory and at a full‐scale plant experiment in retarding onset and rate of oxidation reactions.
Digital signal processing for reducing the effects of RF imperfections in radio devices &#x2014; An overview (2010)

Building compact and low-cost yet flexible and reconfigurable radios for future wireless systems is generally a challenging task. On one hand, the needs for flexibility and re-configurability prevent using dedicated hardware particularly designed and optimized for only a single application or part of the radio spectrum. And on the other hand, to keep the overall size and cost of the radio equipment feasible, especially in multi-antenna multi-radio scenarios, the cost and size of individual radios are strongly limited. As a result, various imperfections and impairments are expected to take place in the used radio transceivers, especially in the radio frequency (RF) analog electronics. Good examples of such imperfections are, e.g., mirror-frequency interference due to I/Q imbalance, non-linear distortion due to mixer and amplifier nonlinearities, timing jitter and non-linearities in sampling and analog-to-digital (A/D) converter circuits, and oscillator phase noise. These impairments, if not properly understood and taken into account, can easily become a limiting factor to the quality and performance of the radio device and thereon of the whole wireless link. This is even more so, when more complex and more sensitive high-order modulated wideband communications waveforms are being deployed in the future systems. This article gives an overview of the essential RF impairments in modern radio communication context. Furthermore, different conceptual alternatives for reducing the effects of RF impairments in radio transmitters and receivers utilizing digital signal processing are described.
Immunohistochemical and Taqman real-time PCR detection of mycobacterial infections in fish (2011)

Real-time PCR and immunohistochemistry (IHC) assays were developed to detect fish mycobacterial infections at the genus level, based on the RNA polymerase β subunit (rpoB) gene and polyclonal anti-Mycobacterium rabbit serum, respectively. The PCR assay positively identified a number of pathogenic mycobacteria including Mycobacterium abscessus, M. avium ssp. avium, M. bohemicum, M. chelonae ssp. chelonae, M. farcinogenes, M. flavescens, M. fortuitum ssp. fortuitum, M. gastri, M. gordonae, M. immunogenicum, M. malmoense, M. marinum, M. montefiorense, M. phlei, M. phocaicum, M. pseudoshottsii, M. salmoniphilum, M. senegalense, M. shottsii, M. smegmatis, M. szulgi and M. wolinskyi. A detection limit equivalent to 10(2) cfu g(-1) was registered for M. salmoniphilum-infected fish tissue. The IHC precisely localized both free and intracellular mycobacteria in tissues and detected mycobacterial infections down to 10(2) cfu g(-1) tissue. Both assays were found to be more sensitive than Ziehl-Neelsen (ZN) staining, where the detection limit was below 8 × 10(3) cfu g(-1) tissue. Although specificity testing of the real-time PCR against a panel of non-Mycobacterium spp. revealed a degree of cross-reaction against pure DNA extracted from Nocardia seriolae and Rhodococcus erythropolis, no cross-reactions were identified (by either real-time PCR or IHC) on testing of formalin-fixed paraffin-embedded (FFPE) tissues confirmed to be infected with these bacteria. The broad applicability of both assays was confirmed by analysis of FFPE tissues from a range of fish species infected with diverse Mycobacterium spp. The results indicate that both assays, alone or in combination, constitute sensitive tools for initial, rapid diagnosis of mycobacteriosis in fish. This should in turn allow rapid application of more specific studies, i.e. culture based, to identify the specific Mycobacterium sp. involved.
Modeling, Analysis, and Reduction of Radiated EMI Due to the Voltage Across Input and Output Cables in an Automotive Non-Isolated Power Converter (2021)

This article investigates the radiated electromagnetic interference (EMI) due to the voltage between input and output cables in a non-isolated power converter. The radiated EMI model of a non-isolated power converter is first developed and quantified based on the circuit topologies, printed circuit board (PCB) parasitics, switching waveforms, and transfer functions. Second, an antenna model is developed for converter cables based on the antenna impedance and the antenna transfer function. Third, a complete radiated EMI model is developed based on the converter&#x0027;s EMI model and the cable&#x0027;s antenna model. Fourth, the radiated EMI is analyzed based on the developed model. Finally, two radiated EMI noise reduction techniques, optimizing PCB layout and adding a cross capacitor, are proposed. The developed radiated EMI model and the proposed radiated EMI reduction techniques are verified with both simulations and experiments. The techniques are also extended to other two non-isolated power converter topologies when the radiated EMI is caused by the voltage between the input and output cables.
Cyclic deformation behaviour of TiAl6V4 and TiAl6Nb7 in different quasi-physiological media (2002)

In the present investigation the cyclic deformation behaviour of TiAl6V4 and TiAl6Nb7 was characterized in constant-amplitude and load increase tests in laboratory air and quasi-physiological media by cycle dependent mechanical hysteresis, temperature and/or corrosion potential measurements. Microstructural changes were evaluated by scanning electron microscopy for defined fatigue states and after specimen failure. In constant-amplitude tests, the alloys show pronounced cyclic softening and/or hardening. In load increase tests with strain and temperature measurements, estimation values for the endurance limit were determined which were lower than the fatigue limits determined in conventional Woehler tests to a maximum cycle number of 2 × 106. For loading in quasi-physiological media, the corrosion potential reliably indicates microstructural damage on the specimen surface. Wechselverformungsverhalten von TiAl6V4 und TiAl6Nb7 in verschiedenen quasi-physiologischen Medien In der vorliegenden Untersuchung wurde das Wechselverformungsverhalten von TiAl6V4 und TiAl6Nb7 in Einstufen- und Laststeigerungsversuchen an Laborluft und in quasi-physiologischen Medien mit Hilfe der Entwicklung der lastspielzahlabhängigen plastischen Dehnungsamplitude sowie der Probentemperatur bzw. des Korrosionspotentials charakterisiert. Für definierte Ermüdungszustände und nach Probenbruch wurden mikrostrukturelle Veränderungen im Rasterelektronenmikroskop untersucht. Das Wechselverformungsverhalten der Legierungen ist in Einstufenversuchen durch zyklische Ent- und/oder Verfestigungsvorgänge gekennzeichnet. In Laststeigerungsversuchen wurden mit Dehnungs- und Temperaturmessungen Schätzwerte für die Wechselfestigkeit ermittelt, die niedriger liegen als die in konventionellen Wöhlerversuchen bis zu einer Grenzlastspielzahl von 2 × 106 ermittelten Werte. Bei Beanspruchung in quasi-physiologischen Medien stellt das Korrosionspotential eine verlässliche Messgröße zum Nachweis mikrostruktureller Schädigungen auf der Probenoberfläche dar.
Controlling light with light (2008)

The field of photorefractive physics and optics is mature and, although there is no significant commercial activity using photorefractive media, researchers in the field have had an extraordinary impact on many related areas of research and development. For example, in the late 1990s many of the telecom innovations and products were based on the interaction between light and matter. Examples include optical switches, filters, gratings, routers and light sources. The theory of multiple interacting beams of light inside a photosensitive medium, many of which were developed or further explored in photorefractive media, has found application in medicine, engineering, communication systems, displays and other photonics devices.
Segment connectivity, chain-length breathing, segmental stretch, and constraint release in reptation models. III. Shear flows (1999)

A previously proposed self-consistent reptation model that includes chain stretching, chain-length fluctuations, segment connectivity, and constraint release is used to predict transient and steady shearing flows. Quantitative comparisons are made with the concentrated solution data considered in the previous papers of the series. The model is able to capture quantitatively all features of experimental data considered, including overshoot in both shear and first normal stresses, the strain-rate dependence of the strain magnitude at maximum stress, the steady-state viscosity and first-normal-stress coefficient as functions of shear rate, the viscosity curves for different molecular weight, the transient and steady-state behavior of the extinction angle, and the stress relaxation in cessation of steady shear flow. The model can describe all aspects of the data very well except the magnitude of the overshoot in stress at high shear rates, where the model is somewhat over-predictive. A new method of analysis for shear stress decay following cessation of steady shear is proposed, based on the physics of the model.
The cancer stem cell gamble (2015)

Researchers are betting that a round of clinical trials will prove a controversial cancer theory and deliver new treatments.
ChemInform Abstract: The 1:2:3 Phases in the Y(Ho, Gd, Nd)—Ba—Cu—O Systems: Calorimetric Investigations, Correlations Between Thermodynamic and Structural Properties. (2000)

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.
Glutathionyl Transferase-Catalyzed Addition of Glutathione to COMC:  A New Hypothesis for Antitumor Activity (2002)

Data are presented indicating that the potent antitumor activity of 2-crotonyloxymethyl-(4&lt;i&gt;R&lt;/i&gt;,5&lt;i&gt;R&lt;/i&gt;,6&lt;i&gt;R&lt;/i&gt;)-4,5,6-trihydroxy-2-cyclohexenone (COTC)\nand 2-crotonyloxymethyl-2-cyclohexenone (COMC) is not likely the result of glyoxalase I inhibition, as has long been assumed. An alternative\nhypothesis is presented, based on the finding that COMC is a substrate for human glutathionyl transferase, which produces a transient, highly\nelectrophilic glutathionylated 2-exomethylenecyclohexanone that can covalently modify proteins and nucleic acids.