gebhart/patrepeval huggingface dataset:
Influence of crystallinity on the dielectric relaxation behavior of poly(ether ether ketone) (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of crystallinity on the dielectric relaxation behavior of poly(ether ether ketone)Douglass S. Kalika and Rajendra K. KrishnaswamyCite this: Macromolecules 1993, 26, 16, 4252–4261Publication Date (Print):August 1, 1993Publication History Published online1 May 2002Published inissue 1 August 1993https://pubs.acs.org/doi/10.1021/ma00068a028https://doi.org/10.1021/ma00068a028research-articleACS PublicationsRequest reuse permissionsArticle Views427Altmetric-Citations80LEARN 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
Sum Spectral Efficiency Maximization in Massive MIMO Systems: Benefits from Deep Learning (2019)

This paper investigates the joint data and pilot power optimization for maximum sum spectral efficiency (SE) in multi-cell Massive MIMO systems, which is a non-convex problem. We first propose a new optimization algorithm, inspired by the weighted minimum mean square error (MMSE) approach, to obtain a stationary point in polynomial time. We then use this algorithm together with deep learning to train a convolutional neural network to perform the joint data and pilot power control in sub-millisecond runtime, making it suitable for online optimization in real multi-cell Massive MIMO systems. The numerical result demonstrates that the solution obtained by the neural network is 1% less than the stationary point for four-cell systems, while the sum SE loss is 2% in a nine-cell system.
Effect of cultivar and harvest date on nitrate content of carrot roots (1999)

SummaryNitrate content is an important quality characteristic of carrots (Daucus carota L.) for the processing industry, so growers strive for the lowest possible values. The objective of this study was to determine whether selection of cultivars or timing of harvest could contribute to producing low nitrate contents in carrots. Field experiments with 24 carrot cultivars were conducted in three years on sandy soil. Rank order correlation and regression analysis showed that cultivar and harvest date may have significant effects on nitrate content in single experiments, but these effects could not be reproduced in another year. Our results suggest that these effects are small when compared with effects of other factors (e.g. irradiance, temperature) that are not usually controlled in field experiments. In contrast to the control of nitrogen supply, selection of cultivars and harvest dates cannot be recommended as a means of reducing the risk of high nitrate content in carrot production.
Length-based attacks in polycyclic groups (2015)

The Anshel–Anshel–Goldfeld (AAG) key-exchange protocol was implemented and studied with the braid groups as its underlying platform. The length-based attack, introduced by Hughes and Tannenbaum, has been used to cryptanalyze the AAG protocol in this setting. Eick and Kahrobaei suggest to use the polycyclic groups as a possible platform for the AAG protocol. In this paper, we apply several known variants of the length-based attack against the AAG protocol with the polycyclic group as the underlying platform. The experimental results show that, in these groups, the implemented variants of the length-based attack are unsuccessful in the case of polycyclic groups having high Hirsch length. This suggests that the length-based attack is insufficient to cryptanalyze the AAG protocol when implemented over this type of polycyclic groups. This implies that polycyclic groups could be a potential platform for some cryptosystems based on conjugacy search problem, such as non-commutative Diffie–Hellman, El Gamal and Cramer–Shoup key-exchange protocols. Moreover, we compare for the firsttime the success rates of the different variants of the length-based attack. These experiments show that, in these groups, the memory length-based attack introduced by Garber, Kaplan, Teicher, Tsaban and Vishne does better than the other variants proposed thus far in this context.
The Pseudomonas aeruginosa LasR quorum-sensing receptor balances ligand selectivity and sensitivity (2018)

Abstract Quorum sensing is a cell-cell communication process that bacteria use to orchestrate group behaviors. Quorum sensing is mediated by extracellular signal molecules called autoinducers. Autoinducers are often structurally similar, raising questions concerning how bacteria distinguish among them. Here, we use the Pseudomonas aeruginosa LasR quorum-sensing receptor to explore receptor sensitivity and selectivity. Alteration of LasR amino acid S129 increases ligand selectivity and decreases ligand sensitivity. Conversely, the L130F mutation enhances LasR sensitivity while reducing selectivity. We solve crystal structures of LasR ligand binding domains complexed with non-cognate autoinducers. Comparison to existing structures reveals that ligand selectivity/sensitivity is mediated by a flexible loop adjacent to the ligand binding site. We show that P. aeruginosa harboring LasR variants with modified selectivity or sensitivity exhibit altered quorum-sensing responses. We suggest that an evolutionary trade-off between ligand selectivity and sensitivity enables LasR to optimally regulate quorum-sensing traits.
Visual exploration behaviour during clock reading in Alzheimer's disease (2004)

Eye movement behaviour during visual exploration of 24 patients with probable Alzheimer's disease and 24 age-matched controls was compared in a clock reading task. Controls were found to focus exploration on distinct areas at the end of each clock hand. The sum of these two areas of highest fixation density was defined as the informative region of interest (ROI). In Alzheimer's disease patients, visual exploration was less focused, with fewer fixations inside the ROI, and the time until the first fixation was inside the ROI was significantly delayed. Changes of fixation distribution correlated significantly with the ability to read the clock correctly, but did not correlate with dementia severity. In Alzheimer's disease patients, fixations were longer and saccade amplitudes were smaller. The altered visual exploration in Alzheimer's disease might be related to parietal dysfunction or to an imbalance between a degraded occipito-parietal and relatively preserved occipito-temporal visual network.
Experimental and Computational Performance Analysis of a Multi-Sensor Wireless Network System for Hurricane Monitoring (2011)

A wireless sensor network system was developed at Florida Institute of Technology to monitor wind induced pressure on low-rise residential building roofs during hurricane events. The system was tested to evaluate the performance of the sensors and their reliability to measure accurate pressure variations. The reliability of the pressure sensors is established by comparing measurements with secondary references and basic Bernoulli theory. The effects of sensor case, wind gusts, wind direction and structural vibration on the measured pressure are also presented. The system was tested in a wind tunnel, on top of a van on a highway road test, and at the University of Florida hurricane simulator. These tests revealed that the pressure readings were sensitive to mechanical vibrations and the sensor case shape, only when facing the windward direction. Some computational fluid dynamics analysis was also employed to verify the sensors performance and to develop reliable computational tools to simulate hurricane effects.
Finite Element Mesh Generation Using Skeleton-Based Decomposition of Sliced Biomedical Image Data: Application to Limb Prosthetics (1996)

Abstract A systematic method to generate hexahedral meshes for finite element (FE) analysis of residual limbs and similar biomedical geometries is presented. It utilizes skeleton-based subdivision of parallel cross-sections into geometrically simple regions onto which structured meshes are easily mapped. Tubular surfaces, defined using B-splines, were chosen to describe component geometries. Application to a below-knee (BK) residual limb is described. Automated hexahedral meshing of sliced data is an advancement in prosthetic stress analysis allowing rapid generation and iterative optimization of the mesh.
Rendering massive virtual worlds (2013)

This course is presented in four sections. The first two presentations show how huge data sets can be streamed and displayed in real time for virtual-globe rendering inside a web browser. Topics include pre-processing, storage, and transmission of real-world data, plus cache hierarchies and efficient culling algorithms.
Electron Beam Irradiated ITO Films as Highly Transparent p-Type Electrodes for GaN-Based LEDs (2013)

We have investigated the effect of electron beam irradiation on the electrical and optical properties of ITO film prepared by magnetron sputtering method at room temperature. Electron beam irradiation to the ITO films resulted in a significant decrease in sheet resistance from 1.28 x 10(-3) omega cm to 2.55 x 10(-4) omega cm and in a great increase in optical band gap from 3.72 eV to 4.16 eV, followed by improved crystallization and high transparency of 97.1% at a wavelength of 485 nm. The overall change in electrical, optical and structural properties of ITO films is related to annealing effect and energy transfer of electron by electron beam irradiation. We also fabricated GaN-based light-emitting diodes (LEDs) by using the ITO p-type electrode with/without electron beam irradiation. The results show that the LEDs having ITO p-electrode with electron beam irradiation produced higher output power due to the low absorption of light in the p-type electrode.
Are Retinal Microvascular Caliber Changes Associated with Severity of Coronary Artery Disease in Symptomatic Cardiac Patients? (2008)

Retinal vascular caliber changes are not associated with the severity of obstructive CAD in symptomatic patients. These data suggest that the association of retinal vascular caliber with clinical CAD seen in epidemiological studies may not be applicable to clinical symptomatic patients and may be related to microvascular, rather than macrovascular, mechanisms.
The Juicebox Assembly Tools module facilitates de novo assembly of mammalian genomes with chromosome-length scaffolds for under $1000 (2018)

Hi-C contact maps are valuable for genome assembly (Lieberman-Aiden, van Berkum et al. 2009; Burton et al. 2013; Dudchenko et al. 2017). Recently, we developed Juicebox, a system for the visual exploration of Hi-C data (Durand, Robinson et al. 2016), and 3D-DNA, an automated pipeline for using Hi-C data to assemble genomes (Dudchenko et al. 2017). Here, we introduce “Assembly Tools,” a new module for Juicebox, which provides a point-and-click interface for using Hi-C heatmaps to identify and correct errors in a genome assembly. Together, 3D-DNA and the Juicebox Assembly Tools greatly reduce the cost of accurately assembling complex eukaryotic genomes. To illustrate, we generated de novo assemblies with chromosome-length scaffolds for three mammals: the wombat, Vombatus ursinus (3.3Gb), the Virginia opossum, Didelphis virginiana (3.3Gb), and the raccoon, Procyon lotor (2.5Gb). The only inputs for each assembly were Illumina reads from a short insert DNA-Seq library (300 million Illumina reads, maximum length 2x150 bases) and an in situ Hi-C library (100 million Illumina reads, maximum read length 2x150 bases), which cost &lt;$1000.
Ultralow VπL values in suspended quantum well waveguides (2012)

We demonstrate VπL values in the optical L-band in suspended quantum well waveguides between 109 and 199 mV cm. This low VπL value results from very strong out-of-plane modal confinement due to the large semiconductor-air refractive index contrast both above and below the waveguide. The measured phase shifts are consistent with a model of waveguide electrorefraction based on the Pockels effect and the quantum confined Stark effect.
Synthesis and Characterization of Vanadyl Hydrogen Phosphite Hydrate (2005)

A novel method for the preparation of vanadyl hydrogen phosphite hydrates is described. The reaction of V2O5, H3PO3, and 1-propanol in the absence of water at 150 °C led to the formation of VOHPO3·1.5H2O with high surface area (ca. 50 m2/g), whereas in the presence of water VOHPO3·H2O was the unique product. The materials were characterized using a combination of techniques including elemental analysis, thermogravimetric analysis, powder X-ray diffraction, laser Raman spectroscopy, and infrared spectroscopy. On heating the sample in flowing nitrogen at 750 °C, it was found that the vanadyl(IV) hydrogen phosphite(III) hydrates transformed into vanadium(III) phosphate(V), VPO4, via an internal oxidation−reduction process between V(IV) and P(III), wherein V(IV) was reduced to V(III) and P(III) was oxidized to P(V). Whereas, heating the vanadyl hydrogen phosphite hydrates in flowing hydrogen can inhibit the phase transformation from vanadyl hydrogen phosphite to VPO4. The catalytic performance for the selective oxidation of n-butane to maleic anhydride using the final catalysts prepared by in situ activation under the reaction conditions was contrasted. It was found that the catalyst derived from the VOHPO3·H2O precursor shows a higher intrinsic activity for the production of maleic anhydride than that derived from VOHPO3·1.5H2O.
Abstract 214: Genetic and transcriptional instability alters cell line drug response (2018)

Abstract Inconsistencies in cell line-based studies jeopardize reproducibility of cancer research. Natural evolution leading to genetic and transcriptional heterogeneity within cancer cell lines may contribute to such inconsistencies. To systematically test this hypothesis, we performed comprehensive genetic and transcriptomic characterization of 27 strains of the common breast cancer cell line MCF7, and then assessed the response of those strains to 321 anti-cancer compounds. We found extensive variation in genomic profiles and responses to small molecules across strains. Genetic variation occurred at all levels – point mutations, rearrangements, and copy number changes – and affected multiple oncogenes and tumor suppressor genes. Similar findings were obtained across 23 strains of the lung cancer cell line A549, indicating that such variation is a general property of cancer cell lines. These changes resulted in substantial differences in gene expression programs, cell morphology and proliferation, and strikingly high variability in drug response. Over 75% of the compounds that exhibited strong activity in some of the strains, were completely inactive in other strains. These results indicate that genomic variation within commonly used cancer cell lines is extensive, resulting in disparate drug responses. Such variation may contribute to difficulties in conducting reproducible cell line-based studies. Citation Format: Uri Ben-David, Ben Siranosian, Gavin Ha, Helen Tang, Nicholas J. Lyons, Robert Burns, Anwesha Nag, Beth Cimini, Peter Tsvetkov, Andrew A. Tubelli, Bang Wong, Aaron R. Thorner, Joshua Bittker, Matthew Meyerson, Rameen Beroukhim, Todd R. Golub. Genetic and transcriptional instability alters cell line drug response [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 214.
31P-NMR and Differential Scanning Calorimetry Studies for Determining Vesicle’s Drug Physical State and Fraction in Alendronate Liposomes (2010)

Background: A liposomal delivery system requires a complete understanding of the physicochemical characteristics of the drugliposome system in order to predict their behavior and stability in-vitro and in-vivo.
Whole Grains in the Renal Diet - Is It Time to Reevaluate Their Role? (2013)

Organizations such as the National Kidney Foundation, the American Kidney Fund, the National Institute of Diabetes and Digestive and Kidney Diseases, and the US Department of Health and Human Services recommend not including whole grains as part of the renal diet. The rationale for this recommendation is the high phosphorus content in these foods. While the phosphorus content in whole grains may be indeed high, it is covalently bound to organic molecules (primarily phytate) and requires the enzyme phytase to be released and become available for absorption. While some phytase is contained in some whole grains (corn, oats, and millet have little to no phytase activity), the enzyme is decreased in milling, food preparation and over time. Since the human intestine does not express phytase, the enzyme required for the release of phosphorus from phytate is not present in the intestinal lumen when ingesting cooked food. Consequently, the bioavailability of phosphorus from whole grains is low. For the reasons presented here we believe that the 'grain ban' in the diet for kidney patients should be reconsidered. By doing this, the kidney diet would be enriched and it would provide needed fiber along with its health benefits, diversify the diet with low sodium choices, and possibly provide adequate protein without increasing phosphorous levels.
Octacosanol restores stress-affected sleep in mice by alleviating stress (2017)

Octacosanol, a component of various food materials, possesses prominent biological activities and functions. It fights against cellular stress by increasing glutathione level and thus scavenging oxygen reactive species. However, its anti-stress activity and role in sleep induction remained elusive. We hypothesize that octacosanol can restore stress-affected sleep by mitigating stress. Cage change strategy was used to induce mild stress and sleep disturbance in mice, and effects of octacosanol administration on amount of sleep and stress were investigated. Results showed that octacosanol did not change rapid eye movement (REM) or non-REM (NREM) sleep compared to vehicle in normal mice. However, in cage change experiment, octacosanol induces significant increase in NREM sleep at doses of 100 and 200 mg/kg (75.7 ± 14.9 and 82.7 ± 9.3 min/5 h) compared to vehicle (21.2 ± 5.1 min/5 h), and decreased sleep latency. Octacosanol induced sleep by increasing number of sleep episodes and decreasing wake episode duration. Plasma corticosterone levels were significantly reduced after octacosanol (200 mg/kg) administration, suggesting a decrease in stress level. Octacosanol-induced changes in sleep-wake parameters in stressed-mice were comparable to the values in normal mice. Together, these data clearly showed that, though octacosanol does not alter normal sleep, it clearly alleviates stress and restore stress-affected sleep.
Analysis of Piecewise Fractional Brownian Motion Signals and Textures (2018)

Piecewise Fractional Brownian motion (p-fBm) is a continuous non-stationary Gaussian process having stationary Gaussian increments, named piecewise fractional Gaussian noise (p-fGn). Unlike fractional Brownian motion (fBm) governed by a unique parameter (Hurst exponent), p-fBm is defined by three parameters: the Hurst exponent in low frequencies, the Hurst exponent in high frequencies and the threshold frequency, which separates the two regimes. In this paper, we present a synthesis method that generates a finite approximation of p-fBm series. Moreover, we analyze the synthesized p-fBm series and test the Gaussianity of both p-fBm and p-fGn. We test the stationarity of the first order increments (p-fGn) and explore an approach to estimation of the process Hurst parameters. Our contribution is relevant to modeling and analysis of certain textures that are characteristic of certain medical and other natural images.
Fixed‐effects inference and tests of correlation for longitudinal functional data (2022)

We propose an inferential framework for fixed effects in longitudinal functional models and introduce tests for the correlation structures induced by the longitudinal sampling procedure. The framework provides a natural extension of standard longitudinal correlation models for scalar observations to functional observations. Using simulation studies, we compare fixed effects estimation under correctly and incorrectly specified correlation structures and also test the longitudinal correlation structure. Finally, we apply the proposed methods to a longitudinal functional dataset on physical activity. The computer code for the proposed method is available at https://github.com/rli20ST758/FILF.
Fluorous Synthesis and Combinatorial Chemistry (2013)

This chapter contains sections titled: Fluorous Synthesis Separation on Fluorous Stationary Phases Fluorous Concepts in Combinatorial Chemistry References
Effect of pyridoxal phosphate on the DNA binding site of activated hepatic glucocorticoid receptor. (1978)

The binding of rat liver glucocorticoid.receptor complexes to DNA-cellulose and nuclei has been studied after activation of the complexes by heating. Subsequent exposure to pyridoxal 5'-phosphate or pyridoxal markedly inhibited this binding. In one system 0.75 mM pyridoxal 5'-phosphate or 6.5 mM pyridoxal gave 50% inhibition. Pyridoxamine 5'-phosphate, pyridoxamine, and pyridoxine did not inhibit significantly. The inhibition by pyridoxal 5'-phosphate is competitive with respect to DNA suggesting that its effect is directly on the DNA binding site of the activated receptor. The inhibition of DNA-cellulose binding by pyridoxal 5'-phosphate can be reversed by treatment with dithiothreitol or by gel filtration, but not if the modified receptor is first reduced using sodium borohydride. These results suggest that pyridoxal 5'-phosphate acts by forming a Schiff base of an epsilon-NH2 of a lysine which may be 1 residue appearing on the surface of the steroid.receptor complex upon activation. However, since pretreatment of the DNA-cellulose with the intercalating drug ethidium bormide also inhibits activated receptor binding, we conclude that the binding of the receptor involves more than electrostatic interactions between receptor positive charges and DNA phosphate groups.