gebhart/patrepeval huggingface dataset:
The Impact of National Culture on Distance Learning Effectiveness (2009)

The purpose of this paper is to integrate the current knowledge about the impact of national culture on distance learning (DL) effectiveness. We brought together our previous studies as well as the results of a prior extensive review of the literature. In addition, we carried out data analysis of an existing data set to uncover potential relationships not discussed in the literature. We discovered that the impact of national culture on DL effectiveness is mediated by cultural practices and learning models and that the current DL applications rarely take into account cultural variations and rely on a limited number of learning models. DL can be an effective agent of knowledge globalization but only if practitioners fully leverage the flexibility the DL technology. Keywords: distance learning effectiveness, Hofstede’s culture theory, cultural dimensions
Abstract 3364: Serial MRI Assessment of Macrophage Activity in the Murine Heart after Myocardial Infarction using Gadolinium-labeled Liposomes as a Positive Contrast Agent (2007)

Introduction: Macrophage activity in the heart after myocardial infarction (MI) has previously been assessed by iron-particle cardiac magnetic resonance (CMR) that produces negative contrast. We hypothesized that a new multimodal, liposomal agent with both Gd-DTPA and fluorescent DiI dye could be used for positive contrast macrophage tracking. Methods: Multimodal liposomes (ML) were prepared with Gd-DTPA-bis-stearylamide and DiI then filtered to ∼0.3 μm size. Nine C57Bl/6 mice were subjected to 1h coronary occlusion followed by up to 7d of reperfusion. ML volumes of 50μl were injected IV on Day 2 post-MI for monocyte/macrophage phagocytosis. Mice were studied by CMR 2–4h after Day 2 injection and daily until Day 7 post-MI. CMR included inversion-recovery (IR) to image ML followed by IP infusion of Gd-DTPA and more IR to image the entire infarct (IF). After final imaging, hearts were removed for Mac2 immunostaining &amp; fluorescence microscopy. Results: Day 2 IR CMR 2–4h after ML injection revealed strong signal enhancement in the spleen with none in the heart. In all mice from Day 3–7, ML signal enhancement marked the LV anterior wall in IF regions (Fig A ). The ML contrast peaked at Day 5 and decreased by Day 7 post-MI (Fig B ). In mice euthanized at Days 4 &amp; 7, ML-enhanced regions corresponded well with regions containing macrophages as labeled by anti-Mac2 (Fig C ) and DiI (Fig D ) Conclusions: ML can assess the accumulation of macrophages in the heart until at least Day 7 post-MI. The Gd tag provides specific positive contrast and the fluorescent tag expedites histological confirmation. This improves over iron-based agents that preclude complementary CMR imaging in regions containing iron.
Making C–C Bonds with Gold: Identification of Selective Gold Sites for Homo- and Cross-Coupling Reactions between Iodobenzene and Alkynes (2012)

The nature of the active sites involved in the gold catalyzed Sonogashira cross-coupling reaction between iodobenzene and phenylacetylene, and in the competitive homocoupling reactions, has been investigated by means of DFT calculations, kinetic measurements, and synthesis of catalysts with different gold surface species. Several catalyst models have been theoretically investigated to simulate gold nanoparticles of different size either isolated, supported on inert materials, or supported on CeO2. The mechanistic studies show that IB dissociation occurs on low coordinated Au0 atoms present in small gold nanoparticles, either isolated or supported, while PA is preferentially adsorbed and activated on Auδ+ species existing at the metal–support interface. When this occurs, the activation energy of the rate-determining step of the Sonogashira reaction, which has been found experimentally to be the bimolecular coupling, is minimized. The product distribution obtained with Au/CeO2 catalysts containing different ratios of Au0/Auδ+ sites confirms the positive role played by cationic gold in the Sonogashira cross-coupling reaction. Importantly, only metallic Au0 atoms present in gold nanoparticles are required to perform the homocoupling of iodobenzene.
Author Correction: Analog Coding in Emerging Memory Systems (2020)

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Channel Extrapolation for FDD Massive MIMO: Procedure and Experimental Results (2019)

Application of massive multiple-input multipleoutput (MIMO) systems to frequency division duplex (FDD) is challenging mainly due to the considerable overhead required for downlink training and feedback. Channel extrapolation, i.e., estimating the channel response at the downlink frequency band based on measurements in the disjoint uplink band, is a promising solution to overcome this bottleneck. This paper presents measurement campaigns obtained by using a wideband (350 MHz) channel sounder at 3.5 GHz composed of a calibrated 64 element antenna array, in both an anechoic chamber and outdoor environment. The Space Alternating Generalized Expectation- Maximization (SAGE) algorithm was used to extract the parameters (amplitude, delay, and angular information) of the multipath components from the attained channel data within the â€trainingâ€ (uplink) band. The channel in the downlink band is then reconstructed based on these path parameters. The performance of the extrapolated channel is evaluated in terms of mean squared error (MSE) and reduction of beamforming gain (RBG) in comparison to the â€ground truthâ€, i.e., the measured channel at the downlink frequency. We find strong sensitivity to calibration errors and model mismatch, and also find that performance depends on propagation conditions: LOS performs significantly better than NLOS.
Ab initio calculations of the ring-opened and ring-closed isomers of C2H4O+: the need for high level electron correlation techniques (1996)

Ab initio calculations, including electron correlation, have been performed with split-valence plus polarization basis sets for isomeric C2H4O+ radical cations. MP2/6-31G∗ calculations do not predict correct geometries for the lowest energy cation. This is attributed to spin contamination as observed in a study of the thiirane radical cation. Symmetry breaking in the closed, C2v, cation is observed at the MP2 level. CI calculations are necessary to eliminate this effect. The lowest energy ring-opened CH2OCH2+ isomer is predicted, at the G2/QCI level, to be 26.2 kcal mol−1 lower than the ring-closed radical cations.
Correction to Evolution of a Novel, Orally Bioavailable Series of PI3Kδ Inhibitors from an Inhaled Lead for the Treatment of Respiratory Disease (2016)

ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionCorrection to Evolution of a Novel, Orally Bioavailable Series of PI3Kδ Inhibitors from an Inhaled Lead for the Treatment of Respiratory DiseaseAugustin Amour, Nick Barton, Anthony W. J. Cooper, Graham Inglis, Craig Jamieson, Christopher N. Luscombe, Josie Morrell, Simon Peace*, David Perez, Paul Rowland, Christopher J. Tame, Sorif Uddin, Giovanni Vitulli, and Natalie WellawayCite this: J. Med. Chem. 2016, 59, 17, 8148Publication Date (Web):August 22, 2016Publication History Published online22 August 2016Published inissue 8 September 2016https://pubs.acs.org/doi/10.1021/acs.jmedchem.6b01157https://doi.org/10.1021/acs.jmedchem.6b01157correctionACS PublicationsCopyright © 2016 American Chemical Society. This publication is available under these Terms of Use. Request reuse permissions This publication is free to access through this site. Learn MoreArticle Views673Altmetric-Citations1LEARN 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 PDF (205 KB) Get e-Alertsclose Get e-Alerts
Rainfall monitoring systems over an urban area: the city of Rome (2005)

Abstract In small catchments a very high space–time rainfall resolution is needed in order to obtain, with sufficient accuracy, flash flood nowcasting as well as monitoring of sewer systems. In this light, a radar meteorology campaign was conducted during the fall of 2001, over the city of Rome (Italy), using measurements collected by the polarimetric Doppler radar Polar 55C located in the south‐east of the city at a distance of 15 km from the downtown and by a network consisting of 32 tipping bucket raingauges. A comparative analysis of the rainfall fields obtained using two interpolation methods (inverse‐distance and kriging) with those obtained using radar rainfall measurements was performed. The overall performance of the different methods was evaluated using objective functions. Errors depending on the gauge density were weighed by changing the number of raingauges considered in the reconstructed rainfall fields. Copyright © 2005 John Wiley &amp; Sons, Ltd.
Reduced secretion of fibulin 5 in age-related macular degeneration and cutis laxa (2006)

Age-related macular degeneration (ARMD) is the leading cause of irreversible visual loss in the Western world, affecting approximately 25 million people worldwide. The pathogenesis is complex and missense mutations in FBLN5 have been reported in association with ARMD. We have investigated the role of fibulin 5 in ARMD by completing the first European study of the gene FBLN5 in ARMD (using 2 European cohorts of 805 ARMD patients and 279 controls) and by determining the functional effects of the missense mutations on fibulin 5 expression. We also correlated the FBLN5 genotype with the ARMD phenotype. We found two novel sequence changes in ARMD patients that were absent in controls and expressed these and the other nine reported FBLN5 mutations associated with ARMD and two associated with the autosomal recessive disease cutis laxa. Fibulin 5 secretion was significantly reduced (P<0.001) for four ARMD (p.G412E, p.G267S, p.I169 T, and p.Q124P) and two cutis laxa (p.S227P, p.C217R) mutations. These results suggest that some missense mutations associated with ARMD lead to decreased fibulin 5 secretion with a possible corresponding reduction in elastinogenesis. This study confirms the previous work identifying an association between FBLN5 mutations and ARMD and for the first time suggests a functional mechanism by which these mutations can lead to ARMD. It further demonstrates that FBLN5 mutations can be associated with different phenotypes of ARMD (not limited to the previously described cuticular drusen type). Such knowledge may ultimately lead to the development of novel therapies for this common disease.
A Generic Building Block For Hopfield Neural Networks With On-chip Learning (2005)

We present an extendable digital architecture for the implementation of a Hofield neural network using fieldprogrammable gate arrays (FPGAs). Due to its bit-serialk implementation, the actual digital circuitry is simple and highly regular, thus allowing efficient space usage of FPGAS. We exploit the reprogrammability of these devices to support on-chip learning.
DC, RF, and microwave noise performances of AlGaN/GaN HEMTs on sapphire substrates (2002)

High-performance AlGaN/GaN high electron-mobility transistors with 0.18-/spl mu/m gate length have been fabricated on a sapphire substrate. The devices exhibited an extrinsic transconductance of 212 mS/mm, a unity current gain cutoff frequency (f/sub T/) of 101 GHz, and a maximum oscillation frequency (f/sub MAX/) of 140 GHz. At V/sub ds/=4 V and I/sub ds/=39.4 mA/mm, the devices exhibited a minimum noise figure (NF/sub min/) of 0.48 dB and an associated gain (Ga) of 11.16 dB at 12 GHz. Also, at a fixed drain bias of 4 V with the drain current swept, the lowest NFmin of 0.48 dB at 12 GHz was obtained at I/sub ds/=40 mA/mm, and a peak G/sub a/ of 11.71 dB at 12 GHz was obtained at I/sub ds/=60 mA/mm. With the drain current held at 40 mA/mm and drain bias swept, the NF/sub min/,, increased almost linearly with the increase of drain bias. Meanwhile, the Ga values decreased linearly with the increase of drain bias. At a fixed bias condition (V/sub ds/=4 V and I/sub ds/=40 mA/mm), the NF/sub min/ values at 12 GHz increased from 0.32 dB at -55/spl deg/C to 2.78 dB at 200/spl deg/C. To our knowledge, these data represent the highest f/sub T/ and f/sub MAX/, and the best microwave noise performance of any GaN-based FETs on sapphire substrates ever reported.
Lymphocyte Subsets in the Lymph Nodes of Rats With Autoimmune Orchitis (1991)

We determined temporal variations of cell subpopulations in the immunization draining lymph nodes during the development of an experimental autoimmune orchitis (EAO) induced in Wistar rats. A phenotypic characterization of T cells and their subsets (CD4+ and CD8+), B, and Ia+ cells was performed by immunofluorescent technique. At the end of the immunization period (30 days), rats injected with testicular homogenate plus adjuvants presented a considerable increase in absolute cell number but normal lymphocyte subset percentages. Testicular damage became evident at 50 days after the first immunization and increased its severity at 80 days: animals that developed EAO presented a lower number of CD8+ cells as compared with undamaged rats. This latter group showed a low CD4/CD8 ratio due to the high proportion of CD8+ cells, which could probably have a suppressor function. At 80 days massive testicular infiltration and decreased absolute cell number in lymph nodes suggest the possible migration of specific lymphocytes to the target organ.
A 3D concrete printing prefabrication platform for bespoke columns (2020)

Recent developments in computational design and digital fabrication with concrete enable the realization of freeform geometries that optimize material use. 3D Concrete extrusion Printing (3DCP) is presently one of the most utilized digital fabrication methods with concrete. The expected advantages of 3DCP result from shaping concrete without formwork and from placing material only where functionally required. Although these advantages were pointed out more than 20 years ago, it is difficult to find competitive examples and their usage in real buildings. Consequently, the nonspecific character of the process acts as a shortcoming by opening up extensive possibilities without a clear direction. This paper proposes an automated 3DCP prefabrication platform for customized columns. The process-specific parameters are, therefore, fine-tuned for high-quality products with diverse forms and textures. Additionally, this paper proposes an evaluation method for geometric complexity and identifies the types of column typologies that may benefit from a 3DCP prefabrication platform.
Tuning the Doping Type and Level of Graphene with Different Gold Configurations (2012)

Au nanoparticles and films are deposited onto clean graphene surfaces to study the doping effect of different Au configurations. Micro-Raman spectra show that both the doping type and level of graphene can be tuned by fine control of the Au deposition. The morphological structures of Au on graphene are imaged by transmission electron microscopy, which indicate a size-dependent electrical characteristic: isolated Au nanoparticles produce n-type doping of graphene, while continuous Au films produce p-type doping. Accordingly, graphene field-effect transistors are fabricated, with the in situ measurements suggesting the tunable conductivity type and level by contacting with different Au configurations. For interpreting the experimental observations, the first-principles approach is used to simulate the interaction within graphene-Au systems. The results suggest that, different doping properties of Au-graphene systems are induced by the chemical interactions between graphene and the different Au configurations (isolated nanoparticle and continuous film).
Microfluidic Isolation and Enrichment of Nanoparticles (2020)

Over the past decades, nanoparticles have increased in implementation to a variety of applications ranging from high-efficiency electronics to targeted drug delivery. Recently, microfluidic techniques have become an important tool to isolate and enrich populations of nanoparticles with uniform properties (<i><i>e.g.</i></i>, size, shape, charge) due to their precision, versatility, and scalability. However, due to the large number of microfluidic techniques available, it can be challenging to identify the most suitable approach for isolating or enriching a nanoparticle of interest. In this review article, we survey microfluidic methods for nanoparticle isolation and enrichment based on their underlying mechanisms, including acoustofluidics, dielectrophoresis, filtration, deterministic lateral displacement, inertial microfluidics, optofluidics, electrophoresis, and affinity-based methods. We discuss the principles, applications, advantages, and limitations of each method. We also provide comparisons with bulk methods, perspectives for future developments and commercialization, and next-generation applications in chemistry, biology, and medicine.
Relaxation Time Mapping in Skeletal Muscle During Reactive Hyperemia (2007)

To obtain further information on the origins of measured signal changes during short term ischemia / reactive hyperemia, the pu rpose of the present study was the dynamic measurement of the relaxation times T1, T2 and T2* during a cuff-compression paradigm on the human calf. No paradigm related changes in T1 were observed. T2 and T2* time courses showed the expected behavior. The calculated initial intensity I0 decreased during ischemia and did not show a large overshoot during reactive hyperemia. This excludes an increase of blood volume as a reason for longer transversal relaxation times observed during reactive hyperemia.
The Preventive Effect of A Magnetic Nanoparticle-Modified Root Canal Sealer on Persistent Apical Periodontitis (2022)

Persistent apical periodontitis is a critical challenge for endodontists. Developing root canal filling materials with continuous antibacterial effects and tightly sealed root canals are essential strategies to avoid the failure of root canal therapy and prevent persistent apical periodontitis. We modified the EndoREZ root canal sealer with the antibacterial material dimethylaminododecyl methacrylate (DMADDM) and magnetic nanoparticles (MNPs). The mechanical properties of the modified root canal sealer were tested. The biocompatibility of this sealer was verified in vitro and in vivo. Multispecies biofilms were constructed to assess the antibacterial effects of the modified root canal sealer. We applied magnetic fields and examined the extent of root canal sealer penetration in vitro and in vivo. The results showed that EndoREZ sealer containing 2.5% DMADDM and 1% MNP had biological safety and apical sealing ability. In addition, the modified sealer could increase the sealer penetration range and exert significant antibacterial effects on multispecies biofilms under an external magnetic field. According to the in vivo study, the apices of the root canals with the sealer containing 2.5% DMADDM and 1% MNP showed no significant resorption and exhibited only a slight increase in the periodontal ligament space, with a good inhibitory effect on persistent apical periodontitis.
Cardiomyogenesis in the Developing Heart Is Regulated by C-Kit–Positive Cardiac Stem Cells (2012)

Myocyte formation derived from CSC differentiation is the major determinant of cardiac growth during development. Division of c-kit-positive CSCs in the mouse is promoted by spontaneous Ca(2+) spikes, which dictate the pattern of stem cell replication and the generation of a myocyte progeny at all phases of prenatal life and up to one day after birth.
Self frequency shift near 2 &#x00B5;m in periodically poled lithium niobate waveguides (2011)

In this experiment, the PPLN waveguides are seeded with a coherent Raman soliton source, based on a Tm oscillator and amplifier. The pulses have a FWHM duration of 100 fs around a center wavelength of 2040 nm, and their energy is 6 nJ at a repetition rate of 70 MHz (average power 420 mW), with up to 2 nJ coupled into the PPLN waveguides. After propagation through an 18.5-mm-long quasi-phasematching (QPM) grating with period 24.3 μm, the peak wavelength of the pulse was shifted to 2175 nm.
A study of magnetization fluctuations in transition region using MFM image analysis (1999)

This paper proposed a method for analysis of MFM (magnetic force microscopy) images. By using the proposed method, the influence of the magnetization fluctuations in transition regions can be analyzed. In the proposed method, the MFM images are processed as stochastic signals, and their stochastic parameters are obtained. The variance profile (the variance of MFM signals across the track direction), one of the parameters, is closely related to the magnetization fluctuations in the transition region. Therefore, by observation of the variance profile, the fluctuations can be quantitatively analyzed. An example of the analysis, which is based on the variance profile, is presented. From the analysis, it is found that the parameter L/W, which is introduced to characterize the variance profile, has the same trend as the S/N/sub m/ (N/sub m/:medium noise) does.
A Three-Port Bidirectional LLC Resonant Converter for PV/Battery Applications (2021)

This paper proposes a three-port bidirectional LLC resonant converter that interfaces with one PV panel and one battery energy storage system (BESS). The topology is a combination of a half-bridge and a full-bridge LLC circuit with six active switches on the primary and a full-bridge rectifier composed of four switches on the secondary. The back-to-back switches are used to short the resonant capacitor and transformer when the battery is charged by the PV source. This topology allows the two sources to share the same resonant tank for transferring energy to the load and allows to store the extra energy from the load into the battery without additional circuit components. In the forward operation, a phase-shift pulse width modulation (PWM) control is employed to implement independent maximum power point tracking (MPPT) for PV panel and the converter voltage gain is controlled by varying the operating frequency as in a typical LLC resonant converter. In the backward operation, the switching frequency is fixed at resonant frequency. Soft switching is realized in all switches over the entire range of source voltage and load conditions. A simulation study was carried out in LTspice software to validate the operating principles of the proposed topology. The PV input voltage range is selected to be 25 V to 45 V and the battery nominal voltage is 50 V with an output voltage regulated at 200 V DC.