gebhart/patrepeval huggingface dataset:
Investigate Contribution of Multi-Microseismic Data to Rockburst Risk Prediction Using Support Vector Machine With Genetic Algorithm (2020)

As a severe hazard in coal mining and rock excavation, the rockburst is usually induced by the high energy tremor. Microseismic (MS) monitoring is suggested to forecast the rockburst risk to reduce its damage. The paper aims to investigate contribution of multi-MS data, including MS raw wave data and MS energy data, to prediction of the high energy tremor, using support vector machine (SVM) together with genetic algorithm (GA). MS monitoring data recorded for more than 400 days at Wudong coal mine of Xinjiang, China, were used in the paper. 132 and 24 features are initially extracted from MS raw wave and energy data in the frequency domain, entropy and time-frequency domain, respectively. GA is not only used to select effective ones among initially extracted features, but also optimize hyperparameters for SVM to classify high energy tremors from general MS events. The performances of the proposed approach based on multi-MS data are evaluated by cross-validation. The results show that the classifier achieves 98% sensitivity, 88% accuracy and 87% specificity using both MS raw wave and energy data, which is better than solely utilizing MS raw wave (98% sensitivity, 84% accuracy and 83% specificity) or energy data (98% sensitivity, 86% accuracy and 85% specificity). These findings suggest that MS raw wave data makes important contribution to rockburst risk prediction as well as MS energy data, and the better performance can be achieved when utilizing two kinds of data simultaneously.
The Evolution of Automation in Parking – Assisted, Automated, Autonomous (2021)

It has felt like Covid-19 had a stranglehold on us. But we haven‘t allowed ourselves to be defeated. On the contrary, we are taking advantage of the opportunities that arise as a result. Not only the long-overdue push towards digitalization, for example, but also the time gained by making fewer journeys. Those who show strength now and position themselves for the future will win. And that is exactly the reason why we have been preparing ELIV 2021 with such a lot of enthusiasm.
The Mechanism of the (2001)

A complex interplay between the catalyst concentration and the reaction rate exists, as shown by kinetic studies, for the [Cp<sub>2</sub> TiMe<sub>2</sub> ]-catalyzed intermolecular hydroamination of alkynes. The reason for this is a reversible dimerization of the catalytically active species [Eq. (1)]. L<sup>1</sup> , L<sup>2</sup> =Cp (cyclopentadienyl), Tol-NH (Tol=4-MeC<sub>6</sub> H<sub>4</sub> , tolyl).
Trace gas detection with CW cavity ring-down laser absorption spectroscopy (2002)

This paper describes the development of a device to measure trace concentrations of impurities in corrosive gases using continuous wave excitation of a Cavity Ring-Down Spectroscopy cell (CW-CRDS). CRDS is an absorption technique, based on Beer's law that determines a sample's concentration from the rate of decay of light coupled into a high-finesse optical resonator containing the sample. It provides absolute and highly accurate measurement of molecular concentrations. The technique requires only modest laser power that single mode diode lasers provide, making the system easily transportable. The near-IR region that is easily accessible with ambient temperature diodes contains both vibrational overtone transitions and forbidden electronic transitions of many important species. Our research focuses on investigating the properties of CRDS to increase detection sensitivity of these species. Specifically, we are studying moisture detection at the parts-per-billion to the parts-per-trillion range. Recently, we obtained an absorption equivalent detection limit of better than 1/spl times/10/sup -11/ cm/sup -1/ Hz/sup -1/2/, which allows us to detect water at less than one ppb. We discuss the device and its applications, and present performance data.
Real time ambient occlusion by curvature dependent occlusion function (2011)

We present the novel technique to compute ambient occlusion [2008] on real-time graphics hardware. Because current real-time ambient occlusion techniques like SSAO need at least 16 rays sampling and too high computational cost to implement on computer games. Our method approximates occlusion as a local illumination model by introducing curvature-dependent function.
The ω3‐polyunsaturated fatty acid derivatives AVX001 and AVX002 directly inhibit cytosolic phospholipase A2 and suppress PGE2 formation in mesangial cells (2012)

These data show for the first time that the novel cPLA(2) inhibitors AVX001 and AVX002 exert an anti-inflammatory effect in cultures of renal mesangial cells and reduce the pro-inflammatory mediator PGE(2) through an inhibitory effect on NF-κB activation. Therefore, these compounds may represent promising novel drugs for the treatment of inflammatory disorders.
Voltage stability preserving invariants for smart grids (2015)

Voltage stability analysis is essential in any power system. This paper addresses the voltage stability in a typical smart grid type system with multiple independent entities. A typical smart grid operation involves various loading excursions (changes in power, both generated and consumed) undertaken by all these independent entities. For a smooth functioning of any generic smart grid type system, correct behavior of all these independent entities must be preserved when one or more of these entities are subjected to various loading levels. Correct behavior of all the entities (sub-systems) will ensure correct behavior of the overall system (smart grid). Invariants, if forced to be true, ensure correct behavior on a subsystem level and thus preserve the overall system correctness. An invariant is a logical predicate on a system state that should not change its truth value if satisfied by system execution [1]. This paper derives an invariant that preserves voltage stability. This invariant is based on an online indicator which is derived from fundamental Kirchhoff s laws and will predict the proximity of voltage collapse at one or more entities in a smart grid. The efficiency of the invariant in predicting voltage collapse has been verified with simulations performed on a typical seven node smart grid system. Thus an online monitoring of the system parameters gives an indication of the system voltage stability. The voltage stability invariant works for both static and dynamic states. This method is also a fast and powerful tool to predict the voltage stability margin of a generic smart grid system by a simple monitoring of the system parameters.
Spatially regularized mixture model for lesion segmentation with application to stroke patients (2015)

In medical imaging, lesion segmentation (differentiation between lesioned and non-lesioned tissue) is a crucial and difficult task. Automated segmentation algorithms based on intensity analysis have been already proposed and recent developments have shown that integrating spatial information enhances automatic image segmentation. However, spatial modeling is often limited to short-range spatial interactions that deal only with noise or small artifacts. Previous tissue alterations (e.g. white matter disease (WMD)) similar in intensity with the lesion of interest require a broader-scale approach to be corrected. On the other hand, imaging techniques offer now a multiparametric voxel characterization that may help differentiating lesioned from non-lesioned voxels. We developed an unsupervised multivariate segmentation algorithm based on finite mixture modeling that incorporates spatial information. We extended the usual spatial Potts model to the regional scale using a 'multi-order' neighborhood potential, with internal adjustment of the regional scale according to the lesion size. We validate the ability of this new algorithm to deal with noise and artifacts (linear and spherical) using artificial data. We then assess its performance on real magnetic resonance imaging brain scans of stroke patients with history of WMD and show that regional regularization was able to remove large-scale WMD artifacts.
Surface Modifications of the PMMA Optic of a Keratoprosthesis to Improve Biointegration (2017)

Biointegration of a keratoprosthesis (KPro) is critical for the mitigation of various long-term postoperative complications. Biointegration of a KPro occurs between the haptic skirt (corneal graft) and the central optic [poly(methyl methacrylate) (PMMA)]. Various studies have highlighted common problems associated with poor bonding and biointegration between these 2 incompatible biomaterials. Resolution of these issues could be achieved by surface modification of the inert material (PMMA). A calcium phosphate (CaP) coating deposited on dopamine-activated PMMA sheets by simulated body fluid incubation (d-CaP coating) was shown to improve adhesion to collagen type I (main component of corneal stroma) compared with untreated PMMA and PMMA with other surface modifications. However, the d-CaP coating could easily undergo delamination, thereby reducing its potential for modification of KPro optical cylinders. In addition, the coating did not resemble the Ca and P composition of hydroxyapatite (HAp). A novel dip-coating method that involves the creation of cavities to trap and immobilize HAp nanoparticles on the PMMA surface was introduced to address the problems associated with the d-CaP coating. The newly obtained coating offered high hydrophilicity, resistance to delamination, and preservation of the Ca and P composition of HAp. These advantages resulted in improved adhesion strength by more than 1 order of magnitude compared with untreated PMMA. With respect to biointegration, human corneal stromal fibroblasts were able to adhere strongly and proliferate on HAp-coated PMMA. Furthermore, the new coating technique could be extended to immobilization of HAp nanoparticles on 3-mm-diameter PMMA cylinders, bringing it closer to clinical application.
Sonic Boom Assessment of a Hypersonic Transport Vehicle with Advanced Numerical Methods (2015)

DOI: 10.2514/6.2015-2685 DOI: 10.2514/6.2015-2685
Equireflectionality and customized unbalanced coherent perfect absorption in asymmetric waveguide networks (2023)

We explore the scattering of waves in designed asymmetric one-dimensional waveguide networks. We show that the reflection between two ports of an asymmetric network can be identical over a broad frequency range, as if the network was mirror-symmetric, under the condition of so-called latent symmetry between the ports. This broadband equireflectionality is validated numerically for acoustic waveguides and experimentally through measurements on microwave transmission-line networks. In addition, introducing a generalization of latent symmetry, we study the properties of an $N$-port scattering matrix $S$. When the powers of $S$ fulfill certain relations, which we coin scaled cospectrality, the setup is guaranteed to possess at least one zero eigenvalue of $S$, so that the setup features coherent perfect absorption. More importantly, scaled cospectrality introduces a scaling factor which controls the asymmetry of the incoming wave to be absorbed. Our findings introduce a novel approach for designing tunable wave manipulation devices in asymmetric setups. As evidenced by our acoustic simulations and microwave experiments, the generality of our approach extends its potential applications to a wide range of physical systems.
The Bilirubin Overload Test with Special Reference to Liver Damage Produced by India Ink. (1961)

The bilirubin overload test is described and the result obtained with a variety of hepatotoxic agents is presented. Hepatic injury can be demonstrated at a very early stage, but the test is of no value in indicating degree of histological liver damage. The biological effect of whole India Ink on the liver can be divided into: 1) Micro-infarction due to obstruction of the sinusoids by India Ink-laden Kupffer cells, an effect not detectable by the bilirubin overload test; and, 2) effect of the shellac which causes only minimal histological damage but which gives an abnormal bilirubin test.
Crystal structure of aquachloro[N,N′-bis(3-ethoxysalicylidene)propylenediiminato] manganese(III) dihydrate, [Mn(C21H24N2O4)Cl(H2O)] · 2H2O (2006)

Abstract C 21 H 30 ClMnN 2 O 7 , triclinic, P 1̅ (no. 2), a = 10.029(2) Å, b = 11.561(2) Å, c = 11.689(2) Å, α = 106.331(3)°, β = 107.874(3)°, γ = 99.092(3)°, V = 1192.8 Å 3 , Z = 2, R gt (F) = 0.071, wR ref (F 2 ) = 0.238, T = 293 K.
Latest Expansions in Lipid Enhancement of Microalgae for Biodiesel Production: An Update (2022)

Research progress on sustainable and renewable biofuel has gained motion over the years, not just due to the rapid reduction of dwindling fossil fuel supplies but also due to environmental and potential energy security issues as well. Intense interest in microalgae (photosynthetic microbes) as a promising feedstock for third-generation biofuels has grown over recent years. Fuels derived from algae are now considered sustainable biofuels that are promising, renewable, and clean. Therefore, selecting the robust species of microalgae with substantial features for quality biodiesel production is the first step in the way of biofuel production. A contemporary investigation is more focused on several strategies and techniques to achieve higher biomass and triglycerides in microalgae. The improvement in lipid enhancement in microalgae species by genetic manipulation approaches, such as metabolic or genetic alteration, and the use of nanotechnology are the most recent ways of improving the production of biomass and lipids. Hence, the current review collects up-to-date approaches for microalgae lipid increase and biodiesel generation. The strategies for high biomass and high lipid yield are discussed. Additionally, various pretreatment procedures that may aid in lipid harvesting efficiency and improve lipid recovery rate are described.
New insights into the role of STAT3 in IBD (2011)

Although it is clear that inflammatory bowel disease (IBD) involves an inappropriate immune response to floral components, the molecular determinants that mediate the gene transcription underlying and aggravating disease remain poorly understood. There is building momentum, however, that implicates differential regulation of the signal transducer and activator of transcription (STAT) 3 as an important factor in mediating pathogenic gene transcription in IBD, and this notion was reinforced by studies presented at the recent 2011 Digestive Disease Week (DDW) conference in Chicago. In the present report we integrate the existing body of literature with the novel data presented at this meeting to present a kaleidoscopic scheme so as to provide further insight into the role of STAT3 in IBD. A genetic propensity to its overactivation in the monocyte and epithelial compartment compromises the innate defense to allow low-level bacterial infection to fester and eventually initiate disease. The subsequent STAT3 activation in various relevant mucosal immune compartments, in particular epithelial cell proliferation and survival, and the function of the regulatory T cells and Th17 cells allow the mucosal immune system to fight the infection and return to steady state. As such, the action of STAT3 in IBD is highly context-dependent but always important.
Zur Konfiguration von 1,3,3‐Trialkyl‐2‐methylenindolinen mit Substituenten an der Methylengruppe (1982)

Abstract Die 1,3,3‐Trialkyl‐2‐methylenindoline 3a – f , 4 und 5 werden synthetisiert und 1 H‐ und 13 C‐NMR‐spektroskopisch untersucht. Die dabei gewonnenen Zuordnungskriterien zwischen 1 H‐ und 13 C‐chemischen Verschiebungen der 1,3,3‐Alkylgruppen und der ( E )‐bzw. ( Z )‐Konfiguration an der Enamin‐Doppelbindung erlauben die Festlegung der bisher unbekannten Konfiguration der Halogenphosphane bzw. Halogenarsane 1 .
Simultaneous in Situ Reflectance and Probe Beam Deflection Measurements at Solid Electrode−Aqueous Electrolyte Interfaces (2006)

A method is herein described for performing simultaneous in situ normal incidence reflectance spectroscopy (ΔR/R, λ = 633 nm) and probe beam deflection (PBD) measurements at solid electrodes in aqueous electrolytes, while scanning the potential linearly between two prescribed limits. Results obtained for Au in 0.1 M HClO4 and for Pt in both 0.1 M HClO4 and 0.1 M NaOH were found to be in excellent agreement with those reported in the literature for each individual spectroelectrochemical technique under otherwise similar conditions. Data collected for Pt electrodes in CO-saturated 0.1 M HClO4 revealed rather sudden changes in both ΔR/R and PBD signals in the voltammetric region where the characteristic sharp peak associated with the oxidation of adsorbed CO occurs. This behavior was ascribed, respectively, to oxide formation (ΔR/R) and to changes in the electrolyte composition in region neighboring the electrode, involving predominantly the acid concentration (PBD). In contrast, CO oxidation on Pt in 0.1 M NaOH yielded a PBD response consistent with formation of solution-phase carbonate via the reaction of the product, CO2, with hydroxyl ion. The exquisite sensitivity of ΔR/R and PBD to interfacial phenomena was further illustrated using a monolayer of hemin irreversibly adsorbed on glassy carbon surfaces in 0.1 M Na2B4O7 (pH ∼9.2). For this system, ΔR/R was found to be proportional to the relative fractions of hemin and its reduced counterpart, while the PBD signal could be correlated with corresponding variations in the electrolyte concentration induced by the surface-bound redox process.
Data volume reduction for imaging radar polarimeter (2003)

The authors derive an algorithm to reduce required storage space for multipolarimetric synthetic aperture radar data which preserves signal integrity. The data reduction operation reduces the required storage by 12.8. The image synthesis process applied to a reduced data set can be applied to a standard image in two minutes on a VAX 785 when the compressed data format is used. This is ten times faster than image synthesis of the corresponding original data, due to the smaller volume of the compressed data (10 Mb compared with 128 Mb per image). The errors introduced in the output images are on the order of 10/sup -3/. Thus, operations with polarimetric data are greatly facilitated and are now within reach of small research groups.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
Performance of DS-CDMA Downlink Systems With Orthogonal UCHT Complex Sequences (2007)

This letter investigates a transmitted signaling technique using orthogonal unified complex Hadamard transform (UCHT) spreading sequences and the coherent RAKE receiver in direct-sequence code-division multiple-access (DS-CDMA) downlinks to maintain the orthogonality between users and reduce the effect of multipath fading and interference from other users. A general multipath-fading channel model is assumed. System performance is evaluated by means of signal-to-interference-plus-noise ratio (SINR) at the RAKE receiver. It is shown that the SINR of the system employing UCHT complex sequences is independent of the phase offsets between different paths, while the SINR of the system using Walsh-Hadamard (WH) sequences is related to the squared cosine of path phase offsets. As a result, the bit-error ratio performance of the DS-CDMA downlink system employing UCHT complex sequences is better than that of the system with WH sequences at high SINRs
Molecular nanoinformatics approach assessing the biocompatibility of biogenic silver nanoparticles with channelized intrinsic steatosis and apoptosis (2021)

Molecular biocompatibility of AgNP is mediated through channelized intrinsic AgNP-proteins interaction in steatosis and apoptosis.
A Facile Synthesis of SiO2@Co/mSiO2 Egg-Shell Nanoreactors for Fischer-Tropsch Reaction (2015)

Recently, a convenient melt-infiltration method, using a hydrated metal salt with porous support, was developed to prepare various metal/metal-oxide nanocatalysts. Until now, millimeter-scale, bead-shaped, cobalt egg-shell catalysts have been used to enhance the rate of reactant diffusion and catalyst performance. In the present work, new SiO2@Co/mSiO2 egg-shell nanoreactors (~300 nm) were synthesized with controlled Co content of 10 and 20 wt%. This was accomplished using a selective melt-infiltration process with porous silica shells around solid-silica cores. The SiO2@Co(10 wt%)/mSiO2 egg-shell catalyst that bears small cobalt nanoparticles of -2 nm was successfully employed for the industrially valuable Fischer-Tropsch synthesis reaction, showing the high activity of -8.0 x 10(-5) mol(CO) x gCo(-1) x S(-1).
Nuclear magnetic resonance spectra of cyclic amines. Shielding of .alpha. protons trans to a lone pair and cis to an N-methyl group in pyrrolidines (1973)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNuclear magnetic resonance spectra of cyclic amines. Shielding of .alpha. protons trans to a lone pair and cis to an N-methyl group in pyrrolidinesEli Breuer and David MelumadCite this: J. Org. Chem. 1973, 38, 8, 1601–1602Publication Date (Print):April 1, 1973Publication History Published online1 May 2002Published inissue 1 April 1973https://pubs.acs.org/doi/10.1021/jo00948a032https://doi.org/10.1021/jo00948a032research-articleACS PublicationsRequest reuse permissionsArticle Views167Altmetric-Citations25LEARN 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
ChemInform Abstract: Cascade Cyclizations of Cyclic Sulfates: An Enantioselective Alternative to Polyepoxide Cyclizations in the Synthesis of Poly( tetrahydrofurans). (1996)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Graphene Oxide Framework Materials: Theoretical Predictions and Experimental Results (2010)

A promising storage medium for hydrogen and other gases is a graphene oxide framework (GOF) that consists of layers of GO connected by benzene-1,4-diboronic acid (B14DBA) pillars (see picture). Theoretical predictions and the initial experimental results are presented for this cheap and environmentally friendly building block for nanoporous materials with better gas adsorption properties.