gebhart/patrepeval huggingface dataset:
Quantitative evaluation of perimeter of porosity in aluminum alloy die casting (2008)

Pore formation in high-pressure die casting is inevitable and pores adversely affect the mechanical properties and pressure tightness. Pores are induced by solidification shrinkage or entrapment of gas. To eliminate pores in die castings in the foundry floor, accurate identification of predominant cause of pores is essential. In this paper, the unbiased quantitative evaluation is proposed so that die casters can take corrective action to reduce pores. We proposed fractal dimension of shape and spatial distribution of porosity perimeter as the quantitative indicator of the identification of pores, namely, shrinkage or gas entrapment. The purpose of the present investigation is to demonstrate the validity of the proposed fractal dimensions by comparing the pores in different regions of die castings, which vary widely in porosity distribution. The proposed fractal dimensions are clearly different from inner region (shrinkage and gas induced pores are mixed) and surface region (only gas induced pores exist) in the die castings.
Noninvasive quantification of intracellular sodium in human brain using ultrahigh–field MRI (2012)

In vivo sodium magnetic resonance imaging (MRI) measures tissue sodium content in living human brain but current methods do not allow noninvasive quantitative assessment of intracellular sodium concentration (ISC) - the most useful marker of tissue viability. In this study, we report the first noninvasive quantitative in vivo measurement of ISC and intracellular sodium volume fraction (ISVF) in healthy human brain, made possible by measuring tissue sodium concentration (TSC) and intracellular sodium molar fraction (ISMF) at ultra-high field MRI. The method uses single-quantum (SQ) and triple-quantum filtered (TQF) imaging at 7 Tesla to separate intra- and extracellular sodium signals and provide quantification of ISMF, ISC and ISVF. This novel method allows noninvasive quantitative measurement of ISC and ISVF, opening many possibilities for structural and functional metabolic studies in healthy and diseased brains.
Channel Modelling for Light Communications: Validation of Ray Tracing by Measurements (2020)

Light communications, also denoted as LiFi, is promising for future wireless indoor networks. For performance evaluation, the IEEE P802.15.13 and P802.11bb standardization groups agreed upon channel models based on non-sequential ray tracing. In this paper, we validate the modeling approach behind by means of measurements. The same indoor scenarios, where measurements took place in 200 MHz bandwidth, have been modeled in 3D and applying ray tracing. We show that the mean-square error between simulation and measurement is below 2%. Finally, we investigate important channel parameters like path loss and coherence bandwidth as a function of distance with and without line-of-sight.
Knockout of Mitochondrial Thioredoxin Reductase Stabilizes Prolyl Hydroxylase 2 and Inhibits Tumor Growth and Tumor-Derived Angiogenesis (2015)

This work demonstrates an unexpected regulatory link between mitochondrial Txnrd and the JNK-PHD2-Hif-1α axis, which highlights how the loss of Txnrd2 and the resulting altered mitochondrial redox balance impairs tumor growth as well as tumor-related angiogenesis. Furthermore, it opens a new avenue for a therapeutic approach to hinder tumor growth by the simultaneous targeting of both the mitochondrial thioredoxin and glutathione systems.
Radiation-Induced Errors at Elevated Linear Energy Transfer Levels and Magnetic Error Rate Interactions in Magnetic Tunnel Junctions (2019)

The response to heavy ion irradiation of Magnetic Tunnel Junctions (MTJs), in 16Mb toggle-bit Magneto-Resistive Random Access Memories (Toggle-MRAMs) at the 150 nm node that are QML V and Q qualified, and in 256Mb STT-MRAMs for sub-100 nm nodes, has been reported in previous work for normal LET (Linear Energy Transfer) levels up to approximately 88 MeV-cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> /mg. In this work, heavy-ion results are reported, which are understood to be novel and to be the first tests of their kind, which were performed on 16Mb Toggle-MRAMs at effective LET levels up to approximately 145 MeV-cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> /mg, using oblique-angle heavy-ion irradiation. Hard errors in MTJ bits were observed in this elevated effective LET testing. Initial magnetic bit error counts are also reported for 16Mb Toggle-MRAMs across temperature, ranging from -55 °C to +125 °C. These findings, combined with MTJ endurance that is greater to much greater than 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">15</sup> write and read cycles, support low error rate operation with low magnetic error rates even at elevated effective LET levels.
Synthesis and Characterization of a (Ketenyl)metal Cluster Complex, an Intermediate in the Oxidative Decarbonation of an Acetylide Ligand (1995)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Characterization of a (Ketenyl)metal Cluster Complex, an Intermediate in the Oxidative Decarbonation of an Acetylide LigandTe-Kun Huang, Yun Chi, Shie-Ming Peng, Gene-Hsiang Lee, Sue-Lein Wang, and Fen-Ling LiaoCite this: Organometallics 1995, 14, 5, 2164–2166Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inissue 1 May 1995https://pubs.acs.org/doi/10.1021/om00005a014https://doi.org/10.1021/om00005a014research-articleACS PublicationsRequest reuse permissionsArticle Views65Altmetric-Citations15LEARN 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-AlertscloseSupporting Info (2)»Supporting Information Supporting Information Get e-Alerts
Investigating the Intrinsic Ethanol/Water Separation Capability of ZIF-8: An Adsorption and Diffusion Study (2013)

Intrinsic ethanol/water separation capability of ZIF-8 is characterized by a detailed study of adsorption and diffusion of ethanol and water vapor in dodecahedral crystals with principle axis dimension of 324, 15.8, and 0.4 μm. ZIF-8 exhibits extremely low water uptakes. At 35 °C and a relative pressure (P/Po) of 0.95, the water uptakes for 324, 15.8, and 0.4 μm ZIF-8 are 0.184, 0.197, and 0.503 mmol/g, respectively, all of which are less than 1 wt % increase relative to original sorbent mass (0.33, 0.35, 0.91 wt %). For ethanol adsorption, ZIF-8 exhibits an S-shape isotherm with low ethanol uptakes at P/Po up to 0.08 and the cage filling phenomenon occurs at P/Po higher than 0.08. The ethanol saturation uptake in ZIF-8 is as high as 30% of the sorbent weight. Because of the existence of the hydrophilic −N–H functionality introduced by the terminating imidazolate (Im) linker and the overall hydrophobicity of the inner network, the effect of outer surface area of ZIF-8 crystals is proved to be non-negligible as ZIF-8 crystals becomes smaller despite the extremely large inner surface area and pore volume, especially for water sorption. The variation of isosteric heats of adsorption for water reveals the existence of structural defect of ZIF-8 framework. Transport diffusivity and corrected diffusivity for water and ethanol in ZIF-8 are determined within the entire P/Po range. The ethanol/water separation performance in ZIF-8 is evaluated in terms of vapor-phase sorption selectivity and permselectivity. While ZIF-8 exhibits ample ethanol/water sorption selectivity, it is not effective for ethanol extraction as a membrane material from dilute ethanol aqueous solutions due to the unfavorable diffusion selectivity and the competitive water uptakes in the adsorbed ethanol phase.
An alternative approach to mevinic acid analogues from methyl (3R)-(–)-3-hydroxyhex-5-enoate and an extension to unambiguous syntheses of (6R)-(+)-and (6S)-(–)-goniothalamin (1991)

Ozonolysis of the 3-silyloxyhexenoate 12, derived from the yeast reduction product methyl (3R)-(–)-3-hydroxyhex-5-enoate 6 and having an enantiomeric enrichment of 78%, followed by Wittig homologation and selenolactonization leads to the unsaturated mevinic acid analogues 17 and 18. Subsequent dehydration gives both enantiomers of the natural product goniothalamin 20 and 21.
The Effect of Ofloxacin on Bacillus Calmette-Guerin Induced Toxicity in Patients With Superficial Bladder Cancer: Results of a Randomized, Prospective, Double-Blind, Placebo Controlled, Multicenter Study (2006)

Prophylactic ofloxacin decreased the incidence of moderate to severe adverse events associated with bacillus Calmette-Guerin intravesical therapy, particularly class III events, which are primarily associated with patient dropout. Compliance with induction and maintenance therapy may be improved by adjuvant ofloxacin therapy. However, long-term comparative studies with other preventive strategies must be done to confirm these initial findings with compliance and recurrence-free survival as the primary end points.
Higher stress and immunity responses are associated with higher mortality in reef-building coral exposed to a bacterial challenge (2016)

ABSTRACT Understanding the drivers of intraspecific variation in susceptibility is essential to manage increasingly frequent coral disease outbreaks. We challenged replicate fragments of eight Acropora millepora genotypes with Vibrio spp. to quantify variation in lesion development and to identify host and coral-associated microbial community properties associated with resistance. While Vibrio spp. remained relatively rare in the microbiome of challenged corals, other stress-associated microbial taxa significantly increased in abundance. Contrary to expectations, higher constitutive immunity and more active immune responses did not confer higher resistance to bacterial challenge. Furthermore, more pronounced gene expression responses to bacterial challenge were associated with higher rather than lower mortality. A newly developed gene expression assay based on two genes related to inflammation and immune responses, deleted in malignant brain tumors 1 and a matrix metalloproteinase, predicted mortality under Vibrio treatment both in the initial experiment and in a validation experiment involving another 20 A. millepora genotypes. Instead of mounting more robust responses, resistant corals were largely unaffected by the bacterial challenge and maintained gene expression signatures of healthier condition, including elevated fluorescent proteins and ribosomal biosynthesis along with diminished ubiquitination. Overall, our results support the view that coral disease and mortality is commonly due to opportunistic pathogens exploiting physiologically compromised hosts rather than specific infections, and show, contrary to the prevailing wisdom, that greater immune responses do not necessarily translate into greater disease resistance.
Dobutamine Stress Echocardiography in Hypertrophic Cardiomyopathy (2003)

In a subgroup of patients with HCM, DSE induces NWMA, associated with a greater increase in heart rate, irrespective of LVOTG. NWMA induce a depression of global LV systolic performance. The septum shows no contractile reserve, regardless of NWMA. These phenomena may be the result of induction of ischemia and/or impaired LV systolic function due to fast heart rate.
Analysis of Two Microphone Method for Feedback Cancellation (2014)

Acoustic feedback cancellation in hearing aids makes use of adaptive filters to continuously identify and track variations to the feedback path. One of the biggest problems remaining in using adaptive filters for feedback cancellation is the biased estimation of the filter's coefficients. In order to remove the undesired correlation between the loudspeaker and incoming signal, a recent alternative scheme proposed to employ an additional microphone. This microphone can provide added information to obtain an incoming signal estimate. This estimate is removed from the primary microphone signal to create the error signal which adapts the canceler's coefficients. This letter provides the theoretical analysis for the two microphone method. It presents analytic expressions showing that the optimal solution is no longer dependent on the signal correlation aforementioned but is now mainly determined by the additional feedback path. Finally, it demonstrates simulation results with the prediction error method in terms of misalignment and maximum gain for a proposed microphone placement. The results show that a more stable solution is obtained with the proposed two microphone approach.
Optimization of DSC MRI Echo Times for CBV Measurements Using Error Analysis in a Pilot Study of High-Grade Gliomas (2017)

Greater heterogeneity was observed in the optimal TE values for high-grade gliomas, and mean values of all 3 ROIs were statistically significant. The optimal TE for the arterial input function estimation is much shorter; this finding implies that quantitative DSC MR imaging acquisitions would benefit from multiecho acquisitions. In the case of a single-echo acquisition, the optimal TE prescribed should be 30-35 ms (without a preload) and 20-30 ms (with a standard full-dose preload).
AskConstants proposes concise non-floats close to floats (2017)

This poster presentation is an opportunity to try the downloadable AskConstants program. This copy of some posters is a sequence of images of the program in operation.
In vivo Cellular Uptake, Degradation, and Biocompatibility of Polyelectrolyte Microcapsules (2007)

Abstract Polyelectrolyte microcapsules are made by layer‐by‐layer (LbL) coating of a sacrificial template, followed by decomposition of the template, to produce hollow microcapsules. In this paper, we report on the in vivo cellular uptake, degradation and biocompatibility of polyelectrolyte microcapsules produced from alternating dextran sulphate and poly‐L‐arginine layers on a template of calcium carbonate microparticles. We show that a moderate tissue reaction is observed after subcutaneous injection of polyelectrolyte microcapsules in mice. Within sixteen days after subcutaneous injection, most of the microcapsules are internalized by the cells and start to get degraded. The number of polyelectrolyte layers determines the stability of the microcapsules after cellular uptake.
Method development for the analysis of resinous materials with MALDI‐FT‐ICR‐MS: novel internal standards and a new matrix material for negative ion mode (2017)

Matrix-assisted laser desorption/ionization (MALDI) is a mass spectrometry (MS) ionization technique suitable for a wide variety of sample types including highly complex ones such as natural resinous materials. Coupled with Fourier transform ion cyclotron resonance (FT-ICR) mass analyser, which provides mass spectra with high resolution and accuracy, the method gives a wealth of information about the composition of the sample. One of the key aspects in MALDI-MS is the right choice of matrix compound. We have previously demonstrated that 2,5-dihydroxybenzoic acid is suitable for the positive ion mode analysis of resinous samples. However, 2,5-dihydroxybenzoic acid was found to be unsuitable for the analysis of these samples in the negative ion mode. The second problem addressed was the limited choice of calibration standards offering a flexible selection of m/z values under m/z 1000. This study presents a modified MALDI-FT-ICR-MS method for the analysis of resinous materials, which incorporates a novel matrix compound, 2-aminoacridine for the negative ion mode analysis and extends the selection of internal standards with m/z <1000 for both positive (15 different phosphazenium cations) and negative (anions of four fluorine-rich sulpho-compounds) ion mode. The novel internal calibration compounds and matrix material were tested for the analysis of various natural resins and real-life varnish samples taken from cultural heritage objects. Copyright © 2017 John Wiley & Sons, Ltd.
An investigation of the effects of iron in p/sup +/n silicon diodes for simulated plasma source ion implantation studies (1999)

This work examines the effect of iron as a contaminate implant impurity on the characteristics of boron p/sup +/n silicon diodes. Plasma-based doping processes [e.g., plasma source ion implantation (PSII)] are subject to concerns about the introduction of contaminant impurities. Here, a relevant database on iron contaminant effects was acquired through a controlled study using conventional ion-beam implantation. Uncontaminated control diodes had leakage current densities of 6-9 nA-cm/sup -2/ at -5 volts and ideality factors <1.05. Iron contaminated diodes had increasing leakage current densities of 8-60 nA-cm/sup -2/ with increasing iron implant doses of 4/spl times/10/sup 7/ to 4/spl times/10/sup 14/ cm/sup -2/ and ideality factors <1.07 over six decades of current, regardless of dose.
Dimorphecolic Acid Is Synthesized by the Coordinate Activities of Two Divergent Δ12-Oleic Acid Desaturases (2004)

Dimorphecolic acid (9-OH-18:2Delta(10)(trans)(,12)(trans)) is the major fatty acid of seeds of Dimorphotheca species. This fatty acid contains structural features that are not typically found in plant fatty acids, including a C-9 hydroxyl group, Delta(10),Delta(12)-conjugated double bonds, and trans-Delta(12) unsaturation. Expressed sequence tag analysis was conducted to determine the biosynthetic origin of dimorphecolic acid. cDNAs for two divergent forms of Delta(12)-oleic acid desaturase, designated DsFAD2-1 and Ds-FAD2-2, were identified among expressed sequence tags generated from developing Dimorphotheca sinuata seeds. Expression of DsFAD2-1 in Saccharomyces cerevisiae and soybean somatic embryos resulted in the accumulation of the trans-Delta(12) isomer of linoleic acid (18: 2Delta(9)(cis)(,12)(trans)) rather than the more typical cis-Delta(12) isomer. When co-expressed with DsFAD2-1 in soybean embryos or yeast, DsFAD2-2 converted 18:2Delta(9)(cis)(,12)(trans) into dimorphecolic acid. When DsFAD2-2 was expressed alone in soybean embryos or together with a typical cis-Delta(12)-oleic acid desaturase in yeast, trace amounts of the cis-Delta(12) isomer of dimorphecolic acid (9-OH-18:2Delta(10)(trans,)(12)(cis)) were formed from DsFAD2-2 activity with cis-Delta(12)-linoleic acid [corrected]. These results indicate that DsFAD2-2 catalyzes the conversion of the Delta(9) double bond of linoleic acid into a C-9 hydroxyl group and Delta(10)(trans) double bond and displays a substrate preference for the trans-Delta(12), rather than the cis-Delta(12), isomer of linoleic acid. Overall these data are consistent with a biosynthetic pathway of dimorphecolic acid involving the concerted activities of DsFAD2-1 and DsFAD2-2. The evolution of two divergent Delta(12)-oleic acid desaturases for the biosynthesis of an unusual fatty acid is unprecedented in plants.
Metallic Membranes with Subwavelength Complementary Patterns: Distinct Substrates for Surface-Enhanced Raman Scattering (2011)

We present a detailed comparison of surface-enhanced Raman spectroscopy (SERS) signals from metallic nanoparticle arrays and their complementary hole arrays. Using an analytical model for local field enhancement, we show that the SERS enhancements of the hole arrays are closely related to their transmission spectra. This trend is experimentally confirmed and characterized by a cos(4 )θ dependence of the SERS signal on the excitation polarization angle θ. The particle arrays, on the other hand, exhibit quite different behavior because of the existence of considerable evanescent modes in the near field. Their maximal local field gains appear at wavelengths generally much larger than their localized surface plasmonic resonant wavelengths.
A Modular Approach To Study Protein Adsorption on Surface Modified Hydroxyapatite (2015)

Biocompatible inorganic nano- and microcarriers can be suitable candidates for protein delivery. This study demonstrates facile methods of functionalization by using nanoscale linker molecules to change the protein adsorption capacity of hydroxyapatite (HA) powder. The adsorption capacity of bovine serum albumin as a model protein has been studied with respect to the surface modifications. The selected linker molecules (lysine, arginine, and phosphoserine) can influence the adsorption capacity by changing the electrostatic nature of the HA surface. Qualitative and quantitative analyses of linker-molecule interactions with the HA surface have been performed by using NMR spectroscopy, zeta-potential measurements, X-ray photoelectron spectroscopy, and thermogravimetric analyses. Additionally, correlations to theoretical isotherm models have been calculated with respect to Langmuir and Freundlich isotherms. Lysine and arginine increased the protein adsorption, whereas phosphoserine reduced the protein adsorption. The results show that the adsorption capacity can be controlled with different functionalization, depending on the protein-carrier selections under consideration. The scientific knowledge acquired from this study can be applied in various biotechnological applications that involve biomolecule-inorganic material interfaces.
Adaptation de la méthode PEEC à la représentation électrique des structures de l'électronique de puissance (2001)

There will be no getting away from spécifie CAD tool for circuit designers in power electronic. Prototype test stages hâve the same need. This work deals with this Computing prototype aspect. The electromagnetic environment of power component is studied, and more precisely problems coming from cabling structures. As a first step, parasitic inductance are studied for spécifie cabling structures: the busbar technology. This study is carried out to insert cabling electrical model in circuit software. A method to balance current in paralleled component is also presented. In a second part, the parasitic capacitance aspect is taken into account. The aim of this study is to find an efficient method to determinate parasitic capacitance of complex system. Différent software are so tested. The method that we will use is based on PEEC method. This method is validated with some measurements.