gebhart/patrepeval huggingface dataset:
A capacitance boosted full-octave LC VCO based 0.7 to 24 GHz fractional-N synthesizer (2015)

This paper describes a technique in which a series inductance is used with a varactor to increase the varactor maximum to minimum capacitance ratio, thus enabling increased tuning range in an LC VCO. This technique is demonstrated through the implementation of an LC VCO tunable over a range greater than an octave, specifically 10.5 to 24 GHz (78%). The VCO is implemented within a fractional-N synthesizer in 32nm SOI CMOS to achieve continuous tuning from a fixed reference and achieves -128 to -119 dBc/Hz phase noise at 10MHz offset from the carrier across the tuning range. Output divider circuits are used to obtain all frequencies down to 660MHz.
Viterbi detection of partial response on a magneto-optical recording channel (1992)

We investigated the effect of the Viterbi detection of partial response in a magneto-optical disk system using a magnetic field modulation recording, and achieve a wide phase margin at 0.4 micrometers /bit.
A Survey of Some Results in Stochastic Adaptive Control (1985)

Some results in discrete-time stochastic adaptive control are surveyed. The survey divides itself into two parts—Bayesian and non-Bayesian adaptive control. In the former area, the problems of converting an incompletely observed system into a completely observed one, multi-armed bandit processes, Bayesian adaptive control of Markov chains and Bayesian adaptive control of linear systems are exposed and surveyed. In the latter area, non-Bayesian adaptive control of Markov chains and the self-tuning regulator are dealt with. Proofs are given, where appropriate, to illustrate the methods involved.
Interaction of Herpesvirus Ateles and Herpesvirus Saimiri with Primate Lymphocytes (1980)

A semiquantitative infectious bioassay, described by Sairenji and Hinuma for the measurement of Epstein-Barr virus (EBV) receptors, was adapted to study the adsorption of the lymphotropic New World herpesvirus ateles (HVA) to established lymphoid lines and lymphocytes of human versus marmoset origin. All marmoset T-cell lines [HVA- or HVS (herpesvirus saimiri)-carrying] had a high adsorbing capacity. EBV-carrying marmoset or human B-cell lines, one EBV-negative human B-lymphoma line, and one human myeloid leukemia-derived line failed to adsorb detectable virus. Two human T-cell derived cell lines of acute lymphatic leukemia origin showed moderate but significant adsorption, and the same was true for unfractionated marmoset lymphocytes. Human peripheral blood did not adsorb, before or after fractionation, whereas normal human thymocytes showed moderate but significant adsorption. It is concluded that HVA receptors are present on human T cells, probably belonging to certain subclasses.
Synthesis and electrical–magnetic properties of polyaniline composites (1998)

Composites of polyaniline (PANI) with both conducting and ferromagnetic feature were synthesized by an improved method proposed by the authors. The electrical and ferromagnetic properties of the composites were measured as a function of the concentration of KOH solution used during polymerization. The conductivity of the composites at room temperature decreases with the increase of the concentration of KOH; the maximum conductivity of 8.0 × 10−1 S/cm can be obtained when 25 wt % of concentration of KOH was used. For a high concentration of KOH, ferromagnetic properties of the composites including a high saturated magnetization (∼ 10.0 emu/g) depending on the concentration of KOH solution and a lower coercive force (Hc ≈ 0) independent of the concentration of KOH solution were observed. It has been demonstrated that magnetic particles (Fe3O4) with nanometer size in the composites can be attributed to the ferromagnetic properties of the composites observed. For a lower concentration of KOH solution, on the other hand, the magnetic properties of the composites can be decomposed to Curie susceptibility χc depending on the temperature and Pauli susceptibility χP independent of the temperature. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 2799–2805, 1998
Dynamic Green's function method applied to vibrations of piezoelectric shells (2002)

In order to efficiently calculate thermoelastic deformations and also Green's functions Maysel's formula is a proper tool in many applications. It can be embedded within multiple field analyses when considering the isothermal background. By generalizing Maysel's formula, it becomes possible to include both the piezoelectric effects and inertia Either some or each of the layers of a composite shell made of piezoelectric materials behave as distributed actuators so that the shell becomes an intelligent or smart structure. To extinguish vibrations say of a shell, an electrical field with a proper control must be applied. The construction of dynamic Green's functions makes the mechanical part of the control problem readily available. A version of that multiple field analysis is presented with the best auxiliary problem constructed in the background. In such a manner, all kinds of symmetries present in the actual coupled problem are preserved, and, for the sake of simplifying the auxiliary problem, constraints on the shell are relaxed. The three-dimensional formulation is at first specialized for the case of thin layered shells of revolution, and applied to an infinite circular cylindrical shell with two ring supports, the piezoelectric influence function being derived. Solutions of the (relaxed) auxiliary problem are more readily available in the frequency space. As a consequence, the time convolution in the dynamic version of Maysel's formula is replaced by a Fourier integral, which is eventually subjected to the fast Fourier transformation.
Condensation nucleation light scattering: a new approach to development of high-sensitivity, universal detectors for separations (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCondensation nucleation light scattering: a new approach to development of high-sensitivity, universal detectors for separationsLori B. Allen and John A. KoropchakCite this: Anal. Chem. 1993, 65, 6, 841–844Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://doi.org/10.1021/ac00054a033RIGHTS & PERMISSIONSArticle Views181Altmetric-Citations41LEARN 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 (436 KB) Get e-Alerts Get e-Alerts
Crystal Structure of Garnet-Related Li-Ion Conductor Li<sub>7–3<i>x</i></sub>Ga<sub><i>x</i></sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub>: Fast Li-Ion Conduction Caused by a Different Cubic Modification? (2016)

Li-oxide garnets such as Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub> (LLZO) are among the most promising candidates for solid-state electrolytes to be used in next-generation Li-ion batteries. The garnet-structured cubic modification of LLZO, showing space group <i>Ia</i>-3<i>d</i>, has to be stabilized with supervalent cations. LLZO stabilized with Ga<sup>3+</sup> shows superior properties compared to LLZO stabilized with similar cations; however, the reason for this behavior is still unknown. In this study, a comprehensive structural characterization of Ga-stabilized LLZO is performed by means of single-crystal X-ray diffraction. Coarse-grained samples with crystal sizes of several hundred micrometers are obtained by solid-state reaction. Single-crystal X-ray diffraction results show that Li<sub>7-3<i>x</i></sub> Ga <sub><i>x</i></sub> La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub> with <i>x</i> > 0.07 crystallizes in the acentric cubic space group <i>I</i>-43<i>d</i>. This is the first definite record of this cubic modification for LLZO materials and might explain the superior electrochemical performance of Ga-stabilized LLZO compared to its Al-stabilized counterpart. The phase transition seems to be caused by the site preference of Ga<sup>3+</sup>. <sup>7</sup>Li NMR spectroscopy indicates an additional Li-ion diffusion process for LLZO with space group <i>I</i>-43<i>d</i> compared to space group <i>Ia</i>-3<i>d</i>. Despite all efforts undertaken to reveal structure-property relationships for this class of materials, this study highlights the potential for new discoveries.
Present and future trend of electron device technology in flat panel display (2002)

The state of the art of the direct matrix and active matrix displays and requirements on their driver devices are reviewed. The future trends of the flat panel displays and related electron devices are discussed. It is noted that flat panel displays are becoming key devices in compact or large-screen television and information systems such as compact compute terminals. The plasma display panel (PDP), electroluminescence display (EL), and liquid crystal display (LCD) are being developed actively. Monochrome PDP and EL have attained large information contents earlier than LCD, and were applied to laptop computers. However, LCD has recently been remarkably improved in its properties. The development of active matrix LCD has started recently. The latter has a diode or thin film transistor (TFT) in each picture element and has high color image quality.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
A Low-Power High-Performance SiGe BiCMOS 802.11a/b/g Transceiver IC for Cellular and Bluetooth Co-Existence Applications (2006)

This paper describes a high-performance WLAN 802.11a/b/g radio transceiver, optimized for low-power in mobile applications, and for co-existence with cellular and Bluetooth systems in the same terminal. The direct-conversion transceiver architecture is optimized in each mode for low-power operation without compromising the challenging RF performance targets. A key transceiver requirement is a sensitivity of -77 dBm (at the LNA input) in 54 Mb/s OFDM mode while in the presence of a GSM1900 transmitter interferer. The receiver chain achieves an overall noise figure of 2.8/3.2 dB, consuming 168/185 mW at 2.8 V for the 2.4/5GHz bands, respectively. Signal loopback and transmit power detection techniques are used in conjunction with the baseband modem processor to calibrate the transmitter LO leakage and the transceiver I/Q imbalances. Fabricated in a 70 GHz f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">T</sub> 0.25-mum SiGe BiCMOS technology for system-in-package (SiP) use, the dual-band, tri-mode transceiver occupies only 4.6 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>
Indirect evidence for release of endothelium-derived relaxing factor in human forearm circulation in vivo. Blunted response in essential hypertension. (1990)

In isolated blood vessels, acetylcholine releases endothelium-derived relaxing factor (EDRF). In vivo, the vasodilator action of acetylcholine may be mediated by EDRF, but prostacyclin or prejunctional inhibition of adrenergic neurotransmission may also be involved. Therefore, we investigated whether acetylcholine releases EDRF in humans in vivo and, if so, whether the response altered in essential hypertension. Acetylcholine was infused into the brachial artery, and forearm blood flow measured by venous occlusion plethysmography. In control subjects, acetylcholine (0.02-16 micrograms/min/100 ml tissue) increased flow from 2.4 +/- 5.0 to 20.6 +/- 5.2 ml/min/100 ml tissue (n = 14; p less than 0.05) and decreased forearm vascular resistance from 42.0 +/- 4.1 to 6.0 +/- 1.4 units (p less than 0.03), a response comparable to that of sodium nitroprusside (0.6 micrograms/min ml tissue). Acetylsalicylic acid (500 mg i.v.) given to block vascular prostacyclin production did not alter the response (n = 14). alpha-Adrenoceptor blockade by phentolamine (12 micrograms/min/100 ml tissue) did not prevent the increase in flow evoked by acetylcholine. In hypertensive patients, the decrease in forearm vascular resistance induced by acetylcholine but not evoked by sodium nitroprusside was reduced as compared with controls (14.5 +/- 3.1 and 6.1 +/- 1.6 units, respectively; n = 8; p less than 0.05). Thus, the vascular effects of acetylcholine in the human forearm circulation are independent of prostaglandins and adrenergic neurotransmission and therefore are most likely to be mediated by EDRF; the acetylcholine-induced release of EDRF is blunted in patients with essential hypertension.
A distributed algorithm for robust LCMV beamforming (2016)

In this paper we propose a distributed reformulation of the linearly constrained minimum variance (LCMV) beamformer for use in acoustic wireless sensor networks. The proposed distributed minimum variance (DMV) algorithm, for which we demonstrate implementations for both cyclic and acyclic networks, allows the optimal beamformer output to be computed at each node without the need for sharing raw data within the network. By exploiting the low rank structure of estimated covariance matrices in time-varying noise fields, the algorithm can also provide a reduction in the total amount of data transmitted during computation when compared to centralised solutions. This is particularly true when multiple microphones are used per node. We also compare the performance of DMV with state of the art distributed beamformers and demonstrate that it achieves greater improvements in SNR in dynamic noise fields with similar transmission costs.
Performance evaluation of a low cost, solid state radio front end for DECT (2002)

The performance of a novel low cost, 3 Volt supply radio front end for DECT is presented. The radio is measured for performance in the DECT environment. Measurements include the bit error rate (BER) for the radio in both additive white Gaussian noise (AWGN) and CCI/ACI (co-channel/adjacent channel interference) environments, and the sensitivity. In addition, measured performance of the open loop modulation and DC compensation circuits is presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Time series Forecast of Call volume in Call Centre using Statistical and Machine Learning Methods (2019)

Time series is a collection of points gathered at regular intervals. Time series analysis explores the time correlations and tries to model it according to trend and seasonality. One of the most relevant tasks, in time series analysis, is forecasting future values, which is considered fundamental in many real-world scenarios. Nowadays, many companies forecast using hand-written models or naive statistical models. Call centers are the front end of the organization, managing the relationship with the customers. A key challenge for call centers remains the call load forecast and the optimization of the schedule. Call load indicates the number of calls a call center receives. The call load forecast is mostly exploited to schedule the staff. They are interested in the short term forecast to handle the unforeseen and to optimize the staff schedule, and in the long term forecast to hire or assign staff to other tasks. Machine learning has been applied to several fields reporting excellent results, and recently, time series forecasting problems have gained a high-interest thanks to the new recurrent network, named Long-short Term Memory. This thesis has explored the capabilities of machine learning in modeling and forecasting call load time series, characterized by a strong seasonality, both at daily and hourly scale. We compare Seasonal Artificial Neural Network (ANN) and a Long-Short Term Memory (LSTM) models with Seasonal Autoregressive Integrated Moving Average (SARIMA) model, which is one of the most common statistical method utilized by call centers. The primary metric used to evaluate the results is the Normalized Mean Squared Error (NMSE), the secondary is the Symmetric Mean Absolute Percentage Error (SMAPE), utilized to calculate the accuracy of the models. We carried out our experiments on three different datasets provided by the Teleopti. Experimental results have proven SARIMA to be more accurate in forecasting at daily scale across the three datasets. It performs better than the Seasonal ANN and the LSTM with a limited amount of data points. At hourly scale, Seasonal ANN and LSTM outperform SARIMA, showing robustness across a forecasting horizon of 160 points. Finally, SARIMA has shown no correlation between the quality of the model and the number of data points, while both SANN and LSTM improves together with the number of sample
Evaluation of Antibiotic Residues in Raw Meat Using Different Analytical Methods (2017)

Antibiotic residue in meat is a serious public health concern due to its harmful effects on consumer health. This study aimed at estimating the residue levels of four commonly used antibiotics in meat samples using three analytical methods (ELISA, TLC and HPLC). A total of 150 samples of raw meat from sales points were analysed for ciprofloxacin, streptomycin, tetracycline, and sulphanilamide residues. Overall, ELISA analysis showed that 56, 34, 18, and 25.3% of the samples tested positive for ciprofloxacin, streptomycin, sulphanilamide and tetracycline residues respectively while TLC and HPLC detected 21.4, 29.4, 92.5, and 14.6%, and 8.3, 41.1, 88.8, and 14.6% of the samples as containing the residues, with ciprofloxacin and sulphanilamide having the lowest and highest occurrence, respectively. Furthermore, the concentrations of antibiotic residues were in the ranges of 19.8-92.8, 26.6-489.1, 14.2-1280.8, and 42.6-355.6 μg/kg with ELISA, while HPLC detected concentration ranges of 20.7-82.1, 41.8-320.8, 65.2-952.2 and 32.8-95.6 μg/kg for sulphanilamide, tetracycline, streptomycin, and ciprofloxacin, respectively. Mean ciprofloxacin and streptomycin residue levels were above the Codex/SA MRL recommended limit, while 3% of the samples contained multidrug residues. Although some of the mean residues levels were below the permissible limits, the co-occurrence of multidrug residues in some of the samples calls for concern.
Super-Paramagnetic Particles Chemically Bound to Luminescent Diamond: Single Nanocrystals Probed with Optically Detected Magnetic Resonance (2015)

We have synthesized novel composite particles made of single-domain nanomagnets chemically bound to nanocrystals of diamond. Optically detected magnetic resonance spectra of nitrogen-vacancy centers in diamond allowed us to estimate the magnetic field of the nanomagnets and to observe the saturation of their magnetization when an external field of a few tens of mT has been applied. The saturation effect is in agreement with the size of the domains measured using transmission electron microscopy and a simple model of magnetization.
Aqueous humor concentrations of vascular endothelial growth factor and pigment epithelium-derived factor in high myopic patients. (2012)

Aqueous humor levels of VEGF in the high myopia group were significantly lower than those in the control group. The differing levels of VEGF and PEDF in the high myopia and control groups suggest that high myopia disrupts the VEGF/PEDF balance in retinal pigment epithelium (RPE) cells.
Rupture of intracranial aneurysms during treatment with Guglielmi detachable coils: incidence, outcome, and risk factors (2001)

Procedure-related rupture of intracranial aneurysms during GDC treatment occurs in 2.5% of cases and is responsible for 1% of treatment-related deaths. Risk factors are as follows: small aneurysm size, previous SAH, and probably the use of a temporary occlusion balloon.
An IC for linearizing RF power amplifiers using envelope elimination and restoration (1998)

This paper presents a monolithic CMOS implementation of an envelope elimination and restoration linearization system that improves the linearity of efficient radio-frequency power amplifiers. The linearization IC, which occupies 4.3 mm/sup 2/ when implemented in a 0.8-/spl mu/m CMOS technology, consists of a limiter, envelope detectors, and delta-modulated switching power supply. This circuit was used to linearize advanced mobile phone system cellular power amplifiers transmitting North American digital cellular (NADC) waveforms. Measurements show that the linearized outputs meet the spectral mask and phase distortion requirements of NADC. The linearization system can improve the overall efficiency from 36 to 49%, while increasing the maximum linear output power from 26.5 to 29.5 dBm.
Heat-Transfer Resistance Measurement Method (HTM)-Based Cell Detection at Trace Levels Using a Progressive Enrichment Approach with Highly Selective Cell-Binding Surface Imprints (2014)

Surface-imprinted polymers allow for specific cell detection based on simultaneous recognition of the cell shape, cell size, and cell membrane functionalities by macromolecular cell imprints. In this study, the specificity of detection and the detection sensitivity for target cells within a pool of non-target cells were analyzed for a cell-specific surface-imprinted polymer combined with a heat-transfer-based read-out technique (HTM). A modified Chinese hamster ovarian cell line (CHO-ldlD) was used as a model system on which the transmembrane protein mucin-1 (MUC1) could be excessively expressed and for which the occurrence of MUC1 glycosylation could be controlled. In specific cancer cells, the overexpressed MUC1 protein typically shows an aberrant apical distribution and glycosylation. We show that surface-imprinted polymers discriminate between cell types that (1) only differ in the expression of a specific membrane protein (MUC1) or (2) only differ in the membrane protein being glycosylated or not. Moreover, surface-imprinted polymers of cells carrying different glycoforms of the same membrane protein do target both types of cells. These findings illustrate the high specificity of cell detection that can be reached by the structural imprinting of cells in polymer layers. Competitiveness between target and non-target cells was proven to negatively affect the detection sensitivity of target cells. Furthermore, we show that the detection sensitivity can be increased significantly by repetitively exposing the surface to the sample and eliminating non-specifically bound cells by flushing between consecutive cell exposures.