gebhart/patrepeval huggingface dataset:
NMR spectroscopy and electron microscopy identification of metabolic and ultrastructural changes to the kidney following ischemia-reperfusion injury (2017)

Cellular, molecular, and ultrastructural nephron changes associated with ischemia-reperfusion injury-induced acute kidney injury (IRI-AKI) are not completely understood. Here, a multidisciplinary study was used to identify nephron changes in a mouse model of IRI-AKI. Histological analyses indicated distended Bowman's glomerular spaces and proximal and distal tubules. Increased filtrate volume in nephrons was caused by reduced water reabsorption by severely damaged proximal tubule brush borders and blocked flow of filtrate into collecting tubules by mucoprotein casts in distal tubules. Immunohistochemistry revealed protein AKI biomarkers in proximal tubules and glomeruli but not in distal tubules. Nuclear magnetic resonance spectroscopy revealed several metabolites that increased such as valine, alanine, and lactate. Other metabolites such as trigonelline, succinate, 2-oxoisocaproate, and 1- methyl-nicotinamide decreased or were absent in urine following IRI due to altered kidney function or metabolism. Urinary glucose increased due to reduced reabsorption by damaged proximal tubule brush borders. Scanning electron microscopy revealed flattening of podocytes and pedicals surrounding glomerular capillaries, and transmission electron microscopy (TEM) revealed effacement of podocyte pedicals, both consistent with increased hydrostatic pressure in nephrons following IRI-AKI. TEM revealed shortened proximal tubule microvilli in IRI kidneys with diminished lamina propia. TEM showed dramatic loss of mitochondria in distal tubule epithelia of IRI kidneys and emergence of multivesicular bodies of endosomes indicating ongoing cellular death. Collectively, the data define ultrastructural changes to nephrons and altered kidney metabolism associated with IRI-AKI.
FUNDAMENTAL PROPERTIES OF RECYCLED ASPHALT MIXES. SIXTH INTERNATIONAL CONFERENCE, STRUCTURAL DESIGN OF ASPHALT PAVEMENTS, VOLUME I, PROCEEDINGS, UNIVERSITY OF MICHIGAN, JULY 13-17, 1987, ANN ARBOR, MICHIGAN (1987)

Experience has shown hot mix recycling to provide a cost-effective rehabilitation option. To resolve some residual doubts about quality, recycled mixes have been evaluated in South Africa through a laboratory investigation and Heavy Vehicle Simulator testing. The laboratory study was carried out to determine the initial engineering properties of asphalt mixes composed of different proportions of reclaimed material, yet meeting the design criteria of conventional mixes. It was found that the proportion of reclaimed material had no effect on permanent deformation and fatigue resistance. This study took no account of either the durability characteristics of recycled mixes or the effect of recycling additives. These factors are currently being investigated. The Heavy Vehicle Simulator has been used to test recycled asphalt base layers. The results of this accelerated testing suggest that the field behaviour of recycled base mixes is comparable to that of conventional asphalt.
Ring Substitution Reactions of Metal-Cyclopentadienyls and Metal-Arenes (1962)

The discovery that ferrocene undergoes many ring substitution reactions has led to a rapid and extensive development of a new field of chemistry, metallocene chemistry. Ferrocene will undergo acylation, alkylation, formylation, mercuration, metalation, aminomethylation, sulfonation, and other reactions that are characteristic of a highly reactive aromatic system. π-Cyclopentadienyl derivatives of ruthenium, osmium, manganese, vanadium, and chromium also exhibit certain of these reactions in varying degrees. The π-arene complexes, benzenechromium tricarbonyl and bis-benzenechromium, can be acylated and metalated, respectively. Substituted metallocenes also undergo a variety of unique reactions as well as transformations characteristic of benzenoid derivatives. Acid dissociation constant measurements as well as certain rate and spectral studies indicate pronounced interannular electronic effects in the ferrocene system. Several approaches to the synthesis of biferrocenyl and higher homologs of ferrocene have been explored. Recent rate and stereochemical studies indicate that carbonium ions adjacent to metallocene systems are highly stabilized because of direct metal electron interaction.
Development of a Ferritic Alloy Separator for a Planar SOFC (1997)

Hearesistant ferriticl alloys were investigated for use as a SOFC separator materiai in order to reduce the difference in thermal expansion between the electrolyte and separatorThe heat resistance offerritic alloys was improved by adding a small amount of lanthammmaking it possible to use them as a SOFC separatorThe thermal cycle characteristics were improved in a50mm50mm single celi using this ferritic alloy in comparison with a cell using an Ni-based alloyThe single cell was operted for about7000hDegrada on of the ce performance was apparentiy mainly caused by gas leakage 11NTRODUCION Planr-typesolidoxidefuelcells(SOFCs) have receive(1a great deal of attention because of their simple manufacturing process and the promise of a higher power density than that available from corresponding tubular designs For the separator materiala heat-resistant alloy offers good performance in terms ofheat conductivitymechanical strength and ease ofmanufacturingFurthermoreits material cost is much lower than LaCrO3-based ceramicsAmong heatresisting alloys nicke1-based austenitic a loys have mainly been used so farHowevertheir thermal expanson coefflcient does not match that of
Synthesis and Properties of Poly(aminocarbophosphazenes) (1994)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Properties of Poly(aminocarbophosphazenes)Harry R. Allcock, Suzanne M. Coley, and Christopher T. MorrisseyCite this: Macromolecules 1994, 27, 11, 2904–2911Publication Date (Print):May 1, 1994Publication History Published online1 May 2002Published inissue 1 May 1994https://doi.org/10.1021/ma00089a002RIGHTS & PERMISSIONSArticle Views148Altmetric-Citations18LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (1 MB) Get e-Alerts Get e-Alerts
Iterative Channel Estimation with Data-Aided Interference Cancellation for Non-Orthogonal Multiple Access (2018)

In the 5 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> generation of mobile cellular systems, non-orthogonal multiple access (NOMA) is being considered as a potential candidate for uplink (UL) multiple access (MA) in addition to the basic orthogonal multiple access scheme in order to support various usage scenarios including small packet transmissions, support of a massive number of users, and low latency and high reliability services. Since for NOMA, multiple users transmit uplink data packet in the same time and frequency resource, it is difficult to accurately estimate the channel coefficients from reference signals, especially if the reference signal itself suffers from interference from other users. This paper proposes a novel channel estimation algorithm which utilizes iterative interference cancellation operation in a data-aided manner in reference signal. This iterative channel estimation algorithm with data-aided interference cancellation provides improved channel estimation and overall link level performance at NOMA receiver.
Direction-specific van der Waals attraction between rutile TiO 2 nanocrystals (2017)

Mutual lattice orientations dictate the types and magnitudes of forces between crystalline particles. When lattice polarizability is anisotropic, the van der Waals dispersion attraction can, in principle, contribute to this direction dependence. We report measurement of this attraction between rutile nanocrystals, as a function of their mutual orientation and surface hydration extent. At tens of nanometers of separation, the attraction is weak and shows no dependence on azimuthal alignment or surface hydration. At separations of approximately one hydration layer, the attraction is strongly dependent on azimuthal alignment and systematically decreases as intervening water density increases. Measured forces closely agree with predictions from Lifshitz theory and show that dispersion forces can generate a torque between particles interacting in solution and between grains in materials.
Preparative Isolation and Purification of Lignans from Justicia procumbens Using High-Speed Counter-Current Chromatography in Stepwise Elution Mode (2015)

Lignans, which are recognized as main constituents in Justicia procumbens, have attracted considerable attention due to their pharmacological activities, including antitumor, anti-hepatitic, cytotoxic, anti-microbial, and anti-virus properties. Preparative high-speed counter-current chromatography (HSCCC) was successfully applied to the isolation and purification of four lignans (justicidin B (1), justicidin A (2), 6'-hydroxyjusticidin C (3) and lignan J1 (4)) from J. procumbens using stepwise elution with a pair of two-phase solvent systems composed of n-hexane-ethyl acetate-methanol-water at (1.3:1:1.3:1, v/v) and (2.5:1:2.5:1, v/v). The preparative HSCCC separation was performed on 300 mg of crude sample yielding compounds 1 (19.7 mg), 2 (9.86 mg), 3 (11.26 mg), and 4 (2.54 mg) in a one-step separation, with purities over 95% as determined by HPLC. The structures of these compounds were identified by MS, 1H-NMR and 13C-NMR. This is the first report on the application of HSCCC to the efficient separation of lignans from J. procumbens.
Percutaneous Lumbar Decompression With SpineJet Hydrosurgery in the Treatment of Lumbar Spinal Stenosis Secondary to Ligamentum Flavum Hypertrophy (2016)

Percutaneous lumbar hydro decompression can be a promising method for the treatment of the patients with lumbar spinal stenosis and neurogenic claudication secondary to ligamentum flavum hypertrophy.
Analysis of the interferometric effect of the background light in apertureless scanning near-field optical microscopy (2003)

We investigate in detail the interferometric nature of the signal delivered by an apertureless scanning near-field optical microscope (SNOM). This nature is first brought to the fore by near-field images of an integrated waveguide. The detection process of an evanescent wave generated by total internal reflection is then studied by both lateral near-field scans and signal detection as a function of the tip-to-sample distance. This study permits interpretation of fringe patterns appearing in apertureless SNOM images and provides important information about the nature of the signal. In particular, both experimental data and simple calculations show that, because of interference with background light coming from the sample, the detected signal can describe the complex field amplitude, or the field intensity, or a subtle mix of both, depending on the tip environment and the tip position.
An approach for micro grid management with hybrid energy storage system using batteries and ultra capacitors (2014)

This paper present a new architecture for a micro grid management system with batteries and ultra-capacitors (UC). The proposed architecture uses DC side cascaded PI for controlling individual hybrid energy storage system (HESS) components such as battery and UC for maintaining power balance and managing PV intermittency. The inverter control is independent of the DC side PI configuration and thus can provide easy integration to any vender specific inverters. The main advantage of the proposed architecture is that it provides independent controllability and decouples the AC side inverter thus improving flexibility. The proposed architecture is tested on a dynamic simulation platform which shows that the method can mitigate 90% of PV intermittencies.
Enhanced confocal microscopy imaging of the in-plane switching of cholesteric liquid crystal cells (2008)

The recently developed fluorescence confocal polarizing microscopy (FCPM) imaging technique allows 3D images of the director structure in a liquid crystal cell to be resolved with sub-micron resolution. Results are presented on imaging the response of 5-micron pitch cholesteric liquid crystals to an in-plane electric field applied between two silver electrodes. The results show, in exquisite detail, how the application of an in-plane field causes the cholesteric helix to tilt through 90&deg; either within, or immediately adjacent to, the electrode gap depending on the sign of the dielectric anisotropy of the liquid crystal. Furthermore, imaging the cholesteric material above the silver electrodes reveals a previously unreported optical intensity enhancement. This phenomenon is discussed along with its possible benefits to the existing imaging technique. The effects of the point spread function of the system are discussed and a ray optics model is used to produce model data highlighting the influence of this phenomenon on the recorded results.
REAL-TIME SIMULATION TECHNOLOGIES IN EDUCATION: A LINK TO MODERN ENGINEERING METHODS AND PRACTICES (2013)

This paper discusses industrial applications ofreal time simulation technologies and opportunities thatexist to include them in modern engineering educationcurricula. Real-time simulators are used extensively inmany engineering fields. As a consequence, the inclusion ofsimulation applications in academic curricula can providegreat value to the student. Statistical power grid protectiontests, aircraft design and simulation, motor drive controllerdesign methods and space robot integration are a fewexamples of real-time simulator technology applications tobe discussed in this paper.Index Terms ⎯ Real-Time Simulation, Hardware-In-the-Loop, Power Grid Simulation, Motor Drive Control, Roboticcontrol.
Phenyl(trihalomethyl)mercury compounds. Exceptionally versatile dihalocarbene precursors (1972)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhenyl(trihalomethyl)mercury compounds. Exceptionally versatile dihalocarbene precursorsDietmar SeyferthCite this: Acc. Chem. Res. 1972, 5, 2, 65–74Publication Date (Print):February 1, 1972Publication History Published online1 May 2002Published inissue 1 February 1972https://pubs.acs.org/doi/10.1021/ar50050a004https://doi.org/10.1021/ar50050a004research-articleACS PublicationsRequest reuse permissionsArticle Views420Altmetric-Citations164LEARN 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
Role of a Ubiquitin-Like Modification in Polarized Morphogenesis (2002)

Type I ubiquitin-like proteins constitute a family of protein modifiers. Here we report the identification of a posttranslational protein modifier from Saccharomyces cerevisiae, Hub1. Overexpression of Hub1 resulted in enhanced conjugate formation when its carboxyl-terminal residue was deleted, suggesting that mature Hub1 may be produced by proteolytic processing. In vivo targets of Hub1 conjugation included cell polarity factors Sph1 and Hbt1. In the hub1Delta mutant, the subcellular localization of both Hbt1 and Sph1 was disrupted, and cell polarization during the formation of mating projections was defective. Consistent with these polarization defects, the hub1Delta mutant was deficient in mating.
Robust H(infinity) control design for the Space Station with structured parameter uncertainty (1991)

A robust H-infinity control design methodology and its application to a Space Station attitude and momentum control problem are presented. This new approach incorporates nonlinear multi-parameter variations in the state-space formulation of H-infinity control theory. An application of this robust H-infinity control synthesis technique to the Space Station control problem yields a remarkable result in stability robustness with respect to the moments-of-inertia variation of about 73% in one of the structured uncertainty directions. The performance and stability of this new robust H-infinity controller for the Space Station are compared to those of other controllers designed using a standard linear-quadratic-regulator synthesis technique.
Planar wideband inphase power divider/combiner using modified Gysel structure (2013)

The design of a wideband inphase power divider/combiner is presented. It uses a modified Gysel structure for an increased band and a reduced number of isolation resistors to only one. The power divider has a simple structure that does not use any slots in the ground plane, and is thus fully compatible with microstrip circuits. Moreover, the device uses one external isolation resistor, and thus it is suitable for high‐power microwave applications because of the easy connection of the isolation resistor to a suitable heat sink. A theoretical analysis is presented to find the values of the design parameters for wideband performance. The simulated and experimental results of the designed divider show 69% fractional bandwidth assuming 15 dB of isolation as a reference.
A generalized ordering constraint for stereo correspondence (1984)

The ordering constraint along epipolar lines is a powerful constraint that has been exploited by some recent stereomatching algorithms. We formulate a generalized ordering constraint, not restricted to epipolar lines. We prove several properties of the generalized ordering constraint and of the forbidden zone , the set of matches that would violate the constraint. We consider both the orthographic and the perspective projection case, the latter for a simplified but standard stereo geometry. The disparity gradient limit found in the human stereo system may be related to a form of the ordering constraint. To illustrate our analysis we outline a simple algorithm that exploits the generalized ordering constraint for matching contours of wireframe objects. We also show that the use of the generalized ordering constraint implies several other stereo matching constraints: (a) the ordering constraint along epipolar lines, (b) figural continuity, (c) Binford's cross-product constraint, (d) Mayhew and Frisby's figural continuity constraint. We finally discuss ways of extending the algorithm to arbitrary 3-D objects.
Quaternary Centers via Ni-Catalyzed Cross-Coupling of Tertiary Carboxylic Acids and Aryl Zinc Reagents (2018)

This work bridges a gap in the cross-coupling of aliphatic redox-active esters with aryl zinc reagents. Previously limited to primary, secondary and specialized tertiary centers, a new protocol has been devised to enable the coupling of general tertiary systems using Ni-catalysis. The scope of this operationally simple method is broad and can be used to simplify the synthesis of medicinally relevant motifs bearing quaternary centers.
Paracellular Filtration Secretion Driven by Mechanical Force Contributes to Small Intestinal Fluid Dynamics (2021)

Studies of fluid secretion by the small intestine are dominated by the coupling with ATP-dependent generation of ion gradients, whereas the contribution of filtration secretion has been overlooked, possibly by the lack of a known mechanistic basis. We measured apical fluid flow and generation of hydrostatic pressure gradients by epithelia of cultured mouse enterocytes, Caco-2 and T-84 cells, and fibroblasts exposed to mechanical force provided by vigorous aeration and in response to ion gradients, inhibitors of ion channels and transporters and in vitro using intact mouse and rat small intestine. We describe herein a paracellular pathway for unidirectional filtration secretion that is driven by mechanical force, requires tight junctions, is independent of ionic and osmotic gradients, generates persistent hydrostatic pressure gradients, and would contribute to the fluid shifts that occur during digestion and diarrhea. Zinc inhibits the flow of fluid and the paracellular marker fluorescein isothyocyanate conjugated dextran (MW = 4 kD) across epithelia of cultured enterocytes (>95%; <i>p</i> < 0.001) and intact small intestine (>40%; <i>p</i> = 0.03). We propose that mechanical force drives fluid secretion through the tight junction complex via a "one-way check valve" that can be regulated. This pathway of filtration secretion complements chloride-coupled fluid secretion during high-volume fluid flow. The role of filtration secretion in the genesis of diarrhea in intact animals needs further study. Our findings may explain a potential linkage between intestinal motility and intestinal fluid dynamics.
Structuring and presenting annotated media repositories (2004)

We generate hypermedia presentations from annotated media repositories using simple document structure as an intermediate phase. This poster applies Web style technologies to this process. Results include style specification for accessing semantically annotated media repositories, for determining document structure from semantic structure and for applying this document structure to the final presentation.
RIVA: a versatile parallel rendering system for interactive scientific visualization (1996)

JPL's Remote Interactive Visualization and Analysis System (RIVA) is described in detail. The RIVA system integrates workstation graphics, massively parallel computing technology, and gigabit communication networks to provide a flexible interactive environment for scientific data perusal, analysis, and visualization, RIVA's kernel is a highly scalable parallel perspective renderer tailored especially for the demands of large datasets beyond the sensible reach of workstations. Early experience with using RIVA to interactively explore and process multivariate, multiresolution datasets is reported; several examples using data from a variety of remote sensing instruments are discussed in detail and the results shown. Particular attention is placed on describing the algorithmic details of RIVA's parallel renderer kernel, with emphasis on the key aspects of achieving the algorithm's overall scalability. The paper summarizes the performance achieved for machine sizes up to more than 500 nodes and for initial input image/terrain bases in the 2 Gbyte range.