gebhart/patrepeval huggingface dataset:
Understanding the Effect of Preparative Approaches in the Formation of “Flower-like” Li4Ti5O12—Multiwalled Carbon Nanotube Composite Motifs with Performance as High-Rate Anode Materials for Li-Ion Battery Applications (2017)

Herein we highlight the significance of nanoscale attachment modality as an important determinant of observed electrochemical performance. Specifically, controlled loading ratios of multi-walled carbon nanotubes (MWNTs) have been successfully anchored onto the surfaces of a unique “flower-like” Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> (LTO) micro-scale sphere motif, for the first time, using a number of different and distinctive preparative approaches, including (i) a sonication method, (ii) an in situ direct-deposition approach, (iii) a covalent attachment protocol, as well as (iv) a π-π interaction strategy. In terms of structural characterization, the composites generated by physical sonication as well as non-covalent π-π interactions retained the intrinsic hierarchical “flower-like” morphology and exhibited a similar crystallinity profile as compared with that of pure LTO. By comparison, the composite prepared by an in situ direct deposition approach yielded not only a fragmented LTO structure, likely due to the possible interfering presence of the MWNTs themselves during the relevant hydrothermal reaction, but also a larger crystallite size, owing to the higher annealing temperature associated with its preparation. Finally, the composite created via covalent attachment was covered with an amorphous insulating linker, which probably led to a decreased contact area between the LTO and the MWNTs and hence, a lower crystallinity in the resulting composite. In addition electrode tests suggested that the composite generated by π-π interactions out-performed the other three analogous heterostructures, due to a smaller charge transfer resistance as well as a faster Li-ion diffusion. In particular, the LTO-MWNT composite, produced by π-π interactions, exhibited a reproducibly high rate capability as well as a reliably solid cycling stability, delivering 132 mA h g<sup>-1</sup> at 50 C, after 100 discharge/charge cycles, including 40 cycles at a high (>20 C) rate. To conclude, such data denote the highest electrochemical performance measured to date as compared with any LTO-carbon nanotube-based composite materials previously reported, under high discharge rate conditions, and tangibly underscore the correlation between preparative methodology and the resulting performance metrics.
Simultaneous design of controller and fault detector and its application to motor drive control system (2002)

This paper presents a simultaneous design strategy of controller and fault detector and its application to motor drive control systems. The influence of a fault in power electronic devices are analyzed and simulated. Experimental results demonstrate the effectiveness of the proposed design method.
Collaborative and content-based image labeling (2008)

Many on-line photo sharing systems allow users to tag their images so as to support semantic image search. In this paper, we study how one can take advantages of the already-tagged images to (semi-)automate the labeling of newly uploaded ones. In particular, we propose a hybrid approach for the prediction where user-provided tags and image visual contents are fused under a unified probabilistic framework. Kernel smoothing and collaborative filtering techniques are explored for improving the accuracy of the probabilistic models estimation. By comparing with some state-of-the-art content-based image labeling methods, we have empirically shown that 1) the proposed method can achieve comparable tag prediction accuracy when there is no user-provided tag, and that 2) it can significantly boost the prediction accuracy if the user can provide just a few tags.
Controlling the fluorescence properties of nitrogen vacancy centers in nanodiamonds (2018)

Control over the formation and fluorescence properties of nitrogen vacancy (NV) centers in nanodiamonds (NDs) is an important factor for their use in medical and sensor applications. However, reports providing a deep understanding of the potential factors influencing these properties are rare and focus only on a few influencing factors. The current contribution targets this issue and we report a comprehensive study of the fluorescence properties of NVs in nanodiamonds as a function of electron irradiation fluence and surface termination. Here we show that process parameters such as defect center interactions, in particular, different nitrogen defects and radiation induced lattice defects, as well as surface functionalities have a strong influence on the fluorescence intensity, fluorescence lifetime and the charge state ratio of the NV centers. By employing a time-correlated single photon counting approach we also established a method for fast macroscopic monitoring of the fluorescence properties of ND samples. We found that the fluorescence properties of NV centers may be controlled or even tuned depending upon the radiation treatment, annealing, and surface termination.
Testing of SMA-enabled Active Chevron Prototypes under Representative Flow Conditions (2008)

Control of jet noise continues to be an important research topic. Exhaust-nozzle chevrons have been shown to reduce jet noise, but parametric effects are not well understood. Additionally, thrust loss due to chevrons at cruise suggests significant benefit from active chevrons. The focus of this study is development of an active chevron concept for the primary purpose of parametric studies for jet noise reduction in the laboratory and secondarily for technology development to leverage for full scale systems. The active chevron concept employed in this work consists of a laminated composite structure with embedded shape memory alloy (SMA) actuators, termed a SMA hybrid composite (SMAHC). SMA actuators are embedded on one side of the neutral axis of the structure such that thermal excitation, via joule heating, generates a moment and deflects the structure. The performance of two active chevron concepts is demonstrated in the presence of representative flow conditions. One of the concepts is shown to possess significant advantages for the proposed application and is selected for further development. Fabrication and design changes are described and shown to produce a chevron prototype that meets the performance objectives.
Enhanced Self‐Assembly of Metal Oxides and Metal‐Organic Frameworks from Precursors with Magnetohydrodynamically Induced Long‐Lived Collective Spin States (2014)

Magneto-hydrodynamic generation of long-lived collective spin states and their impact on crystal morphology is demonstrated for three different, technologically relevant materials: COK-16 metal organic framework, manganese oxide nanotubes, and vanadium oxide nano-scrolls.
Analysis of a Dual-Transduction Receiver for Electrodynamic Wireless Power Transfer (2022)

In this article, we present the characterization and an experimentally validated electromechanical model of a dual-transduction receiver for electrodynamic wireless power transfer (EWPT) system. This dual-transduction EWPT receiver contains two unimorph-type, series-connected piezoelectric transducers and an electrodynamic transducer within a compact footprint and low-profile design. The receiver makes simultaneous use of both piezoelectric and electrodynamic transducers to generate electrical power while operating at its torsion mode mechanical resonance at ∼744 Hz. The electromechanical system behavior and output performance under low-frequency, magnetic near-fields are analyzed by establishing an equivalent lumped-element equivalent electrical circuit model. A prototype device is fabricated, assembled, characterized, and the experimental results are compared with the model predictions under various excitation and loading conditions. A maximum of 49 μW average power is generated by the prototype under 120 μT <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">rms</sub> , which corresponds to 0.54 mW·cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">–3</sup> power density and 37 mW·cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">–3</sup> ·mT <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">–2</sup> normalized power density. This chip-sized (0.09 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> ) design offers an innovative and volume-efficient architecture for application in wirelessly charging wearable and implantable medical devices.
Preparation of a Novel Intumescent Flame Retardant Based on Supramolecular Interactions and Its Application in Polyamide 11 (2017)

The flammability and melt dripping of the widely used bio-based polyamide 11 (PA 11) have attracted much attention in the last decade, and they are still a big challenge for the fire science society. In this work, a novel single macromolecular intumescent flame retardant (AM-APP) that contains an acid source and a gas source was prepared by supramolecular reactions between melamine and p-aminobenzene sulfonic acid, followed by an ionic exchange with ammonium polyphosphate. The chemical structure of AM-APP was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy. AM-APP and TiO<sub>2</sub> were then introduced into PA 11 by melt compounding to improve the fire resistance of the composite. The fire performance of PA 11 composites was evaluated by the limiting oxygen index (LOI), vertical burning (UL-94), and cone calorimetry tests. The results showed that the presence of 22% AM-APP and 3% TiO<sub>2</sub> increased the LOI value from 22.2 to 29.2%, upgraded the UL-94 rating from no rating to V-0, completely eliminated melt dripping, and significantly decreased the peak heat release rate from 943.4 to 177.5 kW/m<sup>2</sup>. The thermal behaviors were investigated by thermogravimetric (TG) analysis and TG-FTIR. It is suggested that AM-APP produces an intumescent char structure and releases inert gases, whereas TiO<sub>2</sub> may consolidate the char layers, leading to the improvement in the fire resistance of PA 11.
Synthesis of Imidazothiazole–Chalcone Derivatives as Anticancer and Apoptosis Inducing Agents (2010)

A new class of imidazo[2,1-b]thiazole chalcone derivatives were synthesized and evaluated for their anticancer activity. These chalcone derivatives show promising activity, with log GI(50) values ranging from -7.51 to -4.00. The detailed biological aspects of these derivatives toward the MCF-7 cell line were studied. Interestingly, these chalcone derivatives induced G(0)/G(1)-phase cell-cycle arrest, down-regulation of G(1)-phase cell-cycle regulatory proteins such as cyclin D1 and cyclin E1, and up-regulation of CDK4. Moreover, these compounds elicit the characteristic features of apoptosis such as enhancement in the levels of p53, p21, and p27, suppression of NF-κB, and up-regulation of caspase-9. One of these chalcone derivatives, 3 d, is potentially well suited for detailed biological studies, either alone or in combination with existing therapies.
Crystal structure of Bis(O-ethylxanthato)bis(quinolin-8-olato)tin(IV) (1978)

The crystal structure of the title compound, [Sn(S2COEt)2(C9H6NO)2], has been determined by single-crystal X-ray diffraction at 298 K and refined by least squares to a residual of 0.049 for 1771 ?observed? reflections. Crystals are monoclinic, P21/n, a 12.21(1), b 24.33(1), c 9.159(7) ?, ß 102.12(6)°, Z 4. The environment of the tin atom is six- coordinate: the two coordinating sulfur atoms of the monodentate xanthate ligands lie cis in the coordination sphere [Sn-S, 2.484(4), 2.510(4) ?], and one in turn trans to the two oxine nitrogen atoms [Sn- N, 2.260(8), 2.237(10) ?]. The remaining positions, trans to each other, are occupied by the oxine oxygen atoms [Sn-O, 2.047(7), 2.065(8) ?]. O-Sn-O is 157.0(3)°. The overall point symmetry of the molecule is a good approximation to 2.
Side-Chain Interactions in α-Helical Poly(γ-phenacyl L-glutamate) (1973)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSide-Chain Interactions in α-Helical Poly(γ-phenacyl L-glutamate)F. Heitz, G. Spach, C. Hélène, and J. L. DimicoliCite this: Macromolecules 1973, 6, 6, 845–847Publication Date (Print):November 1, 1973Publication History Published online1 May 2002Published inissue 1 November 1973https://pubs.acs.org/doi/10.1021/ma60036a012https://doi.org/10.1021/ma60036a012research-articleACS PublicationsRequest reuse permissionsArticle Views52Altmetric-Citations4LEARN 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 optionsGet e-Alertsclose Get e-Alerts
Quasi-concerted allylic rearrangement in the reaction of allylic chlorides with methyltin tris(methanethiolate) (1984)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuasi-concerted allylic rearrangement in the reaction of allylic chlorides with methyltin tris(methanethiolate)Howard Edan Katz and William H. Starnes Jr.Cite this: J. Org. Chem. 1984, 49, 15, 2758–2761Publication Date (Print):July 1, 1984Publication History Published online1 May 2002Published inissue 1 July 1984https://pubs.acs.org/doi/10.1021/jo00189a023https://doi.org/10.1021/jo00189a023research-articleACS PublicationsRequest reuse permissionsArticle Views96Altmetric-Citations5LEARN 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 optionsGet e-Alertsclose Get e-Alerts
Plumisclerin A, a Diterpene with a New Skeleton from the Soft Coral Plumigorgia terminosclera (2010)

A novel compound, named plumisclerin A (1), was isolated from samples of the soft coral Plumigorgia terminosclera collected at Mayotte Island. The compound possesses the novel plumisclerane carbon skeleton, including a tricyclo[4,3,1,0(1,5)]decane ring. Its structure and relative stereochemistry were elucidated by extensive spectroscopic analysis, including HREIMS, COSY, HSQC, HMBC, TOCSY, and NOESY experiments. In addition, the novel compound displayed in vitro cytotoxicity against selected cancer cell lines.
Response to “Comment on ‘Energy transfer in nanowire solar cells with photon-harvesting shells’” [J. Appl. Phys. 105, 124509 (2009)] (2010)

Improvement in open circuit voltage of MEHPPV
A generalization of pulse inversion Doppler (2002)

A generalization of pulse inversion Doppler is presented enabling the selective detection and combination of harmonic components of received echoes from tissue or ultrasound contrast agents. If phase shifts other than half a period (i.e. pulse inversion) are applied to the transmitted pulses of a color Doppler sequence, the harmonic components generated by tissue or ultrasound contrast agents are spread across the Doppler spectrum. This approach of interrogating these nonlinear systems has the advantage of the selective detection or combination of harmonic components by filtering in the Doppler domain (i.e. wall filtering). We propose a method, easily understood in the Doppler domain, of detecting and combining harmonic components to gain more tissue or contrast over tissue information and thus improve SNR, relative to conventional pulse inversion.
Formulation of Screen-Printable Cu Molecular Ink for Conductive/Flexible/Solderable Cu Traces (2019)

Screen printing is the most common method used for the production of printed electronics. Formulating copper (Cu) inks that yield conductive fine features with oxidation and mechanical robustness on low-temperature substrates will open up opportunities to fabricate cost-effective devices. We have formulated a screen-printable Cu metal-organic decomposition (MOD) ink comprising Cu formate coordinated to 3-(diethylamino)-1,2-propanediol, a fractional amount of Cu nanoparticles (CuNPs), and a binder. This simple formulation enables ∼70-550 μm trace widths with excellent electrical [∼8-15 mΩ/□/mil or 20-38 μΩ·cm] and mechanical properties with submicron-thick traces obtained by intense pulse light (IPL) sintering on Kapton and poly(ethylene terephthalate) (PET) substrates. These traces are mechanically robust to flexing and creasing where less than 10% change in resistance is observed on Kapton and ∼20% change is observed on PET. Solderable Cu traces were obtained only with the combination of the Cu MOD precursor, CuNP, and polymer binder. Both thermally and IPL sintered traces showed shelf stability (<10% change in resistance) of over a month in ambient conditions and 10-70% relative humidity, suitable for day-to-day fabrication. To demonstrate utility, light-emitting diodes (LEDs) were directly soldered to IPL sintered Cu traces in a reflow oven without the need for a precious metal interlayer. The LEDs were functional not only during bending and creasing of the Cu traces but even after 180 min at 140 °C in ambient air without losing illumination intensity. High definition television antennas printed on Kapton and PET were found to perform well in the ultrahigh frequency region. Lastly, single-walled carbon nanotube-based thin-film transistors on a silicon wafer were fabricated with a screen-printed Cu source and drain electrodes, which performed comparably to silver electrodes with mobility values of 12-15 cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup> and current on/off ratios of ∼10<sup>5</sup> and as effective ammonia sensors providing parts per billion-level detection.
Prevention of congestion in packet-switched multistage interconnection networks (1995)

This paper proposes a simple, yet effective scheme to prevent congestion in a packet-switched multistage interconnection network (MIN) caused by hot spots. In this scheme, switches in the second and third stages of the MIN monitor their buffer occupancy to detect any notable nonuniform access behavior. When a switch detects congestion, packets generated by processors will be blocked from entering the congested switch until the congestion is cleared. Our scheme is compared with two well known schemes and shown to exhibit significantly better performance than these two.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
New image processing challenges for jointly designed electro-optical imaging systems (2009)

Still-image processing algorithms are tailored to and depend crucially upon the properties of the class of images to which they are applied, for instance natural images in consumer digital cameras, medical images in fMRI machines, and binary text images in some photocopiers. We describe a new and possibly very important class of images and tasks for which traditional algorithms seem ill-suited, and for which new algorithms and general methods and concepts are required. This new class of images arises in imaging systems designed through new, joint optimization methods where the optics and the image processing are designed simultaneously in order to yield a high-quality digital image. These new design methods yield intermediate optical images that have unusual spatial, noise and chromatic properties ill-served by traditional image methods. Moreover, these new images present a number of novel challenges in image processing hardware implementations such as constrained space-variance. We describe these briefly new, joint methods for designing digital-optical imaging systems, characterize the intermediate optical images they yield, and some of the digital image processing challenges for producing high-quality still images from these sensed optical images.
Crystallization-Based Synthetic Route to Antimalarial Agent BRD5018: Diazocene Ring Formation via a Staudinger-aza-Wittig Reaction on an Azetidine-Ribose Template (2021)

The development of an entirely crystallization-based synthetic route to the antimalarial BRD5018 is described, which assembles a structurally complex bicyclic azetidine scaffold adorned with five stereogenic centers without the need for any chromatographic separations. A diastereoselective glycine ester Claisen rearrangement, diastereomeric salt resolution, and diastereoselective iodo-lactonization are utilized to provide an efficient access to three contiguous stereogenic centers on an acyclic template with the desired relative and absolute configurations. A tandem aziridine ring-opening/azetidine ring-closure on the derived 2-amino-1,4-diol template was developed to efficiently establish the all-cis trisubstituted azetidine scaffold with the proper ancillary functionality for end-game maneuvers. d-Ribose-2,3-acetonide provided a conveniently differentiated vicinal syn-diol suitable for the planned reductive amination/periodate cleavage/Staudinger-aza-Wittig sequence to form the eight-membered diazocene ring. An early quantitative installation of the diaryl acetylene moiety via a Sonogashira coupling on an electronically matched methyl 4-bromocinnamate circumvented a low-yielding, late-stage reaction in the first-generation synthesis. Multiple crystalline intermediates enabled the complete removal of chromatography from the synthesis resulting in a substantially reduced cost and waste generation with enhanced throughput and quality control.