gebhart/patrepeval huggingface dataset:
(.eta.6-C6H6)V and (.eta.6-C6F6)V: an optical, EPR, and IR spectroscopy and X.alpha.-MO study. 1 (1986)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT(.eta.6-C6H6)V and (.eta.6-C6F6)V: an optical, EPR, and IR spectroscopy and X.alpha.-MO study. 1Mark P. Andrews, Saba M. Mattar, and Geoffrey A. OzinCite this: J. Phys. Chem. 1986, 90, 5, 744–753Publication Date (Print):February 1, 1986Publication History Published online1 May 2002Published inissue 1 February 1986https://pubs.acs.org/doi/10.1021/j100277a010https://doi.org/10.1021/j100277a010research-articleACS PublicationsRequest reuse permissionsArticle Views153Altmetric-Citations45LEARN 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 optionsSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
Template matching for signal identification in cognitive radio systems (2012)

Spectrum sensing feature of cognitive radio systems introduces methods to improve the spectrum utilization. The unique signatures or specific features of wireless signals can be utilized to improve the performance of spectrum sensing by identifying the signals. Moreover, spectral efficiency can be improved by achieving signal orthogonality in different domains such as code, polarization and location beside the frequency and time. However, such methods assume the types of the signals of interest to be known. In this paper, template matching method is proposed as a new spectrum sensing technique to identify the wireless signals based on the spectral signatures in the spectrum. In contrary to the original template matching approach, the number of templates to be kept in the database is limited to one abstract signal for each signal type. The templates are constructed from the abstracts and scaled based on the template matching parameters. Two new metrics are introduced for signal identification method proposed. The performance of proposed metrics are also compared with that of energy detection for wireless fading channels. Identification of the signals with the similar signatures are discussed as well.
A Nanoparticle Convective Directed Assembly Process for the Fabrication of Periodic Surface Enhanced Raman Spectroscopy Substrates (2010)

A highly scalable approach for producing surface-enhanced Raman spectroscopy substrates is introduced. The novel method involves assembling individual nanoparticles in pre-defined templates, one particle per template, forming a high denisity of nanogaps over large areas, while decoupling nanostructure synthesis from placement. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Beamforming Design for Wireless Coded Caching with Different Cache Sizes (2022)

This paper studies the performance of wireless coded caching over multiple-input and single-output (MISO) channels in a finite signal-to-noise power ratio (SNR) region when every user has a different cache memory size. We first propose multicast beamforming for the network with the conventional coded caching based on quadratic transform (QT) and then point out the non-optimality of the caching scheme when the spatial degree of freedom (DoF) is exploited. We hence formulate a new optimization problem to enhance the caching gain by minimizing the difference between the generated codewords. Numerical results confirm the non-optimality of the conventional coded caching in terms of the average transmission rate and the improvement of our proposed caching.
Unexpected Binding Modes of Nitric Oxide Synthase Inhibitors Effective in the Prevention of a Cerebral Palsy Phenotype in an Animal Model (2010)

Selective inhibition of the neuronal isoform of nitric oxide synthase NOS (nNOS) has been shown to prevent brain injury and is important for the treatment of various neurodegenerative disorders. However, given the high active site conservation among all three NOS isoforms, the design of selective inhibitors is an extremely challenging problem. Here we present the structural basis for why novel and potent nNOS inhibitors exhibit the highest level of selectivity over eNOS reported so far (∼3,800-fold). By using a combination of crystallography, computational methods, and site-directed mutagenesis, we found that inhibitor chirality and an unanticipated structural change of the target enzyme control both the orientation and selectivity of these novel nNOS inhibitors. A new hot spot generated as a result of enzyme elasticity provides important information for the future fragment-based design of selective NOS inhibitors.
ChemInform Abstract: Sonochemical Preparation and Size‐Dependent Properties of Nanostructured CoFe2O4 Particles. (1999)

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.
A New Read Scheme for High-Density Emerging Memories (2018)

Several new memories are being studied as candidates of future DRAM that seems difficult to be scaled. However, the read signal in these new memories needs to be amplified in a single-end manner with reference signal supplied if they are aimed for being applied to the high-density main memory. This scheme, which is fortunately not necessary in DRAM's 1/2Vdd pre-charge sense amp, can become a serious bottleneck in the new memory development, because the device electrical parameters in these new memory cells are prone to large cell-to-cell variations without exception. Furthermore, the extent to which the parameter fluctuates in data “1” is generally not the same as in data “0”. In these situations, a new sensing scheme is proposed that can minimize the sensing error rate for high-density single-end emerging memories like STT-MRAM, ReRAM and PCRAM. The scheme is based on averaging multiple dummy cell pairs that are written “1” and “0” in a weighted manner according to the fluctuation unbalance between “1” and “0”. A detailed analysis shows that this scheme is effective in designing 128Mb 1T1MTJ STT-MRAM with the results that the required TMR ratio of an MTJ can be relaxed from 130% to 90% for the fluctuation of 6% sigma-to-average ratio of MTJ resistance in a 16 pair-dummy cell averaging case by using this technology when compared with the arithmetic averaging method.
Synthesis of conjugated Schiff‐base polymers (1970)

Abstract Attempts to synthesize conjugated polymers with cyanine dyes attached to the conjugated backbone are described. The experimental approach is to prepare and characterize conjugated polymers with attached quinolinium ions and then to convert these to dyes by reaction with lepidinium methiodide. Aromatic Schiff‐base polymers were chosen as the conjugated backbone. Since unsubstituted Schiff bases show very little conjugation, a series of model compounds and model polymers were prepared and their electronic spectra were determined in order to correlate the effect of substituents on electron delocalization. Efforts are being made to prepare high molecular weight polymers by a Schiff‐base exchange reaction. The syntheses of various monomers for the Schiff‐base exchange reaction are described.
Plasmon Enhanced Third-Harmonic Generation with Graphene Nanoribbons (2018)

Graphene’s strong third-order nonlinearity could allow single-photon level interactions. Using third-harmonic generation, we characterize this nonlinearity over a wide wavelength range (1-4um). We study a further plasmon enhancement by resonantly pumping graphene nanoribbons.
Carbon Nanotubes and Nanowires for Biological Sensing (2005)

This chapter reviews the recent development in biological sensing using nanotechnologies based on carbon nanotubes and various nanowires. These 1D materials have shown unique properties that are efficient in interacting with biomolecules of similar dimensions, i.e., on a nanometer scale. Various aspects including synthesis, materials properties, device fabrication, biofunctionalization, and biological sensing applications of such materials are reviewed. The potential of such integrated nanobiosensors in providing ultrahigh sensitivity, fast response, and high-degree multiplex detection, yet with minimum sample requirements is demonstrated. This chapter is intended to provide comprehensive updated information for people from a variety of backgrounds but with common interests in the fast-moving interdisciplinary field of nanobiotechnology.
Analysis of optimal filter banks for multiple description coding (2002)

We study the problem of multiple description (MD) coding of stationary Gaussian sources with memory. First, we compute an approximate rate distortion region for these sources, which we prove to be asymptotically tight at high rates: this region generalizes the standard MD rate distortion region for memoryless sources. Then we develop an algorithm for the design of optimal biorthogonal filter banks for MD coding. Finally. We present some experimental results, where we measure the deviation from optimality of our proposed system. For almost uncorrelated sources the gap between the performance of our proposed system and the ideal bounds is quite high, on the other hand for highly correlated sources this gap is reduced, due to the ability of our system to take advantage of the memory in the source. In this case, in realistic scenarios where finite complexity/delay is an issue, the subband coding approach is competitive with other approaches such as the decorrelating transform followed by MD scalar quantizers.
&lt;30 mW rectangular-to-polar conversion processor in 802.11ad polar transmitter (2015)

This paper presents an energy-efficient digital signal processor (DSP) for rectangular-to-polar conversion in 802.11ad polar transmitter working on 60 GHz band. Firstly, system simulations with a complete transmission chain are conducted with regard to error vector magnitude and output spectrum, which allows to systematically optimize the design requirements on the DSP block. Secondly, algorithm and architecture co-optimization on the DSP block is explored to minimize the power consumption. Finally, the proposed DSP is synthesized using 28 nm CMOS technology, which provides a throughput of 7.04 Giga samples per second with a power consumption of 28 mW, and area of 0.01 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> .
Analysis of a new intra-disk redundancy scheme for high-reliability RAID storage systems in the presence of unrecoverable errors (2006)

Today's data storage systems are increasingly adopting low-cost disk drives that have higher capacity but lower reliability, leading to more frequent rebuilds and to a higher risk of unrecoverable media errors. We propose a new XOR-based intra-disk redundancy scheme, called interleaved parity check (IPC), to enhance the reliability of RAID systems that incurs only negligible I/O performance degradation. The proposed scheme introduces an additional level of redundancy inside each disk, on top of the RAID redundancy across multiple disks. The RAID parity provides protection against disk failures, while the proposed scheme aims to protect against media-related unrecoverable errors.We develop a new model capturing the effect of correlated unrecoverable sector errors and subsequently use it to analyze the proposed scheme as well as the traditional redundancy schemes based on Reed-Solomon (RS) codes and single-parity-check (SPC) codes. We derive closed-form expressions for the mean time to data loss (MTTDL) of RAID 5 and RAID 6 systems in the presence of unrecoverable errors and disk failures. We then combine these results for a comprehensive characterization of the reliability of RAID systems that incorporate the proposed IPC redundancy scheme. Our results show that in the practical case of correlated errors, the proposed scheme provides the same reliability as the optimum albeit more complex RS coding scheme. Finally, the throughput performance of incorporating the intra-disk redundancy on various RAID systems is evaluated by means of event-driven simulations. A detailed description of these contributions is given in [1].
Effect of interfaces in Monte Carlo computer simulations of ferroelectric materials (2004)

In this article, Monte Carlo simulation methods were used to investigate the influence of interface layers between the ferroelectric core material and the electrodes on the hysteresis loop in ferroelectric thin films. The hysteresis loops were calculated using an existing Monte Carlo model. For certain interface configurations, the simulations resulted in asymmetric hysteresis loops, similar to imprinted loops, due to asymmetric nucleation kinetics. Although the results might not offer a new explanation for imprint in ferroelectric thin films, they provide insight into the often observed phenomenon of initially imprinted hysteresis loops of as-prepared thin-film samples.
Diversity-Oriented Synthesis Catalyzed by Diethylaminosulfur-Trifluoride—Preparation of New Antitumor Ecdysteroid Derivatives (2022)

Fluorine represents a privileged building block in pharmaceutical chemistry. Diethylaminosulfur-trifluoride (DAST) is a reagent commonly used for replacement of alcoholic hydroxyl groups with fluorine and is also known to catalyze water elimination and cyclic Beckmann-rearrangement type reactions. In this work we aimed to use DAST for diversity-oriented semisynthetic transformation of natural products bearing multiple hydroxyl groups to prepare new bioactive compounds. Four ecdysteroids, including a new constituent of <i>Cyanotis arachnoidea</i>, were selected as starting materials for DAST-catalyzed transformations. The newly prepared compounds represented combinations of various structural changes DAST was known to catalyze, and a unique cyclopropane ring closure that was found for the first time. Several compounds demonstrated in vitro antitumor properties. A new 17-<i>N</i>-acetylecdysteroid (<b>13</b>) exerted potent antiproliferative activity and no cytotoxicity on drug susceptible and multi-drug resistant mouse T-cell lymphoma cells. Further, compound <b>13</b> acted in significant synergism with doxorubicin without detectable direct ABCB1 inhibition. Our results demonstrate that DAST is a versatile tool for diversity-oriented synthesis to expand chemical space towards new bioactive compounds.
A Fully Connected Neural Network Approach to Mitigate Fiber Nonlinear Effects in 200G DP-16-QAM Transmission System (2020)

Fiber nonlinear effects in optical transmission are an important issue to be solved to ensure higher bit rate and denser spectral efficiency in metro/long-haul optical networks. Various kinds of digital signal processing techniques exist to mitigate fiber nonlinear transmission impairments, but they suffer from heavy computational resources and require the knowledge of system parameters. Artificial Neural Networks (ANN) have recently attracted a lot of interest by being agnostic to transmission parameters and driven only by data. Here, a fully connected ANN is proposed to mitigate nonlinear effects induced in optical fibers. It aims to find the inverse transfer function of the nonlinear transmission channel. Two positions for the ANN are studied at receiver side: after Multiple-Input-Multiple-Output (MIMO) or after Carrier Phase Estimation (CPE). We show that inserting the ANN after CPE leads to significantly higher Bit Error Rate (BER) improvement. The proposed solution is trained and tested over a numerically simulated single channel 200 Gbps DP-16-QAM signal. It is also tested in quasi-single channel condition for a 200 Gbps DP-16-QAM signal with experimental temporal traces generated over the transmission test-bed of the laboratory. It allows BER improvements over a large range of span input powers compared to purely linear equalization.
Ion energy, ion flux, and ion mass effects on low-temperature silicon epitaxy using low-energy ion bombardment process (1996)

In low-temperature (300–350 °C) silicon epitaxy employing low-energy inert-gas ion bombardment on a growing film surface, the effects of ion bombardment energy and ion flux as well as that of ion species on the crystallinity of a grown silicon film have been experimentally investigated. It is shown that the energy dose determined by the product of ion energy and ion flux is a main factor for epitaxy that compensates for the reduction in the substrate temperature. Large-mass, large-radius ion bombardment using Xe has been demonstrated to be more effective in promoting epitaxy at low substrate temperatures than Ar ion bombardment. Thus, low-energy, high-flux, large-mass ion bombardment is the direction to pursue for further reducing the processing temperature while preserving high crystallinity of grown films.
Capacity evaluation of a cellular CDMA uplink with multiuser detection (2002)

The performance of a cellular CDMA uplink together with multiuser detection is evaluated. A system level simulator is built to utilise the link level simulation results and to derive the actual network capacity. A semistatic approach is chosen for the network simulator to model the special features in a CDMA system. The work is currently continued within the European Union ACTS program in the FRAMES project.
Evaluation of Infineon HybridPACKTM Drive with Optimized Integrated Capacitor/Bus DC Link for High Performance Inverter Applications (2018)

The Infineon HybridPACK (exp TM) Drive module was previously evaluated using the SBE 700A186 (500muF and 500V) capacitor/bus DC link [1]. This testing demonstrated the importance of low equivalent series inductance to achieve maximum efficiency with fast switching at full voltage, but test equipment was limited to 50kW. Power testing up to 150kW is now performed using both 750V and 1200V IGBT versions of the HybridPACK (exp TM) Drive along with the 500V and 750V variants of the SBE capacitor/bus test kit. This work provides critical thermal data to establish a high performance inverter baseline that can be directly compared to silicon carbide modules which are planned for the HybridPACKTM Drive package in the near future.
Towards Practical Print-from-video: Improved Pattern Filtering (2007)

Print-from-video can be achieved by using super-resolution (SR) techniques. These techniques involve combining information from multiple low resolution images to generate and print a high resolution image. Among the existing SR techniques, the most suitable technique for deployment on portable consumer electronics products having limited processing and memory resources is the shift-and-add method. However, this technique is known to generate artifacts when applied to real video sequences. This paper introduces a number of improvements made to the shift-and-add technique to reduce the level of artifacts so that it can be deployed on portable camera devices. These improvements, named improved pattern filtering, consist of three computationally efficient steps of frame alignment, frame selection, and frame fusion. In these steps, motion vector field and DCT coefficient information are derived from an MPEG codec and utilized to improve the quality of printed images. The effectiveness of the developed solution is demonstrated by showing both quantitative and qualitative comparison results.
Utilization of Dense Carbon Dioxide as an Inert Solvent for Chemical Syntheses (2010)

This chapter contains sections titled: Introduction Dense Carbon Dioxide as Solvent Medium for Chemical Processes Enzymatic Catalysis in Dense Carbon Dioxide Other Reactions in Dense Carbon Dioxide Polymer Synthesis in Supercritical Carbon Dioxide Conclusions Acknowledgments References
Micro-photoreflectance spectroscopy for microscale monitoring of plasma-induced physical damage on Si substrate (2014)

An advanced method of photoreflectance spectroscopy (PRS) is studied to enable the microscale optical characterization of Si substrates, physically damaged by energetic ions from plasma during etching. The method examined in this study (µ-PRS) features a microscope module that focuses a probe beam into a 15-µm-wide “microspot” on the wafer surface. Silicon wafers were exposed to argon plasma and then measured by µ-PRS. The obtained spectra were analyzed, and the damaged wafers were quantitatively characterized in terms of the change in their surface potential. In this study, we demonstrate the µ-PRS’s capability for the microscopic characterization of plasma-damaged wafers.
Venetoclax plus R- or G-CHOP in non-Hodgkin lymphoma: results from the CAVALLI phase 1b trial (2019)

Novel strategies, such as chemosensitization with targeted agents, that build on the success of standard immunochemotherapy show promise for the treatment of non-Hodgkin lymphoma (NHL). Here, we report a phase 1b study investigating dose escalation of the BCL2 inhibitor, venetoclax, in combination with rituximab or obinutuzumab and cyclophosphamide, doxorubicin, vincristine, and prednisone (R-/G-CHOP) chemotherapy in B-cell NHL. Objectives included safety assessment and determination of a recommended phase 2 dose (RP2D). Fifty-six patients were enrolled, most with follicular lymphoma (43%) or diffuse large B-cell lymphoma (DLBCL; 32%). Dose-limiting toxicities were reported in 3/14 patients at the first venetoclax dose (200 mg/d), after which dosing was changed from daily to 10 days per cycle and escalated to 800 mg. A further reduction to 5 days per cycle occurred at the 800-mg dose level in the G-CHOP arm. Cytopenias were predominant among grade 3/4 events and reported at a higher rate than expected, particularly in the G-CHOP arm; however, safety was manageable. Overall response rates were 87.5% (R-CHOP and G-CHOP combinations); complete response (CR) rates were 79.2% and 78.1%, respectively. Most double-expressor (BCL2<sup>+</sup> and MYC<sup>+</sup>) DLBCL patients (87.5%; n = 7/8) achieved CR. Although the maximum tolerated dose was not reached, the RP2D for venetoclax with R-CHOP was established at 800 mg days 4 to 10 of cycle 1 and days 1 to 10 of cycles 2 to 8; higher doses were not explored, and this dosing schedule demonstrated an acceptable safety profile. This regimen is subsequently being evaluated in first-line DLBCL in the phase 2 portion of the study. This trial was registered at www.clinicaltrials.gov as #NCT02055820.