gebhart/patrepeval huggingface dataset:
Graphene Based Controllable Broadband Terahertz Metamaterial Absorber with Transmission Band (2018)

A graphene-based controllable broadband terahertz metamaterial absorber with transmission band is presented in this paper. It consists of a graphene-SiO₂-frequency selective surface (FSS) sandwich structure. The sinusoidal graphene layer supports continuous plasmonic resonances, forming a broad electric-tuning absorbing band. Bandpass FSS constructs a transmission window outside the absorbing band. The simulation results indicate that the absorption from 0.5 THz to 1 THz can be tuned continuously from 0.4 to 0.9 with angle and polarization independence. A transparent window peaking at 1.65 THz maintains high transmittance over 0.7. The metamaterial absorber has potential applications for detection, stealth, filtering, and electromagnetic compatibility.
Complexation with heparin prevents adhesion between fibrin-coated surfaces. (1992)

Heparin, in Langmuirian fashion, binds stoichiometrically with high affinity, Kd approximately 100 nM, to both fibrinogen and fibrin adsorbed as monomolecular films to lecithin-coated, microscopic, polystyrene-divinylbenzene beads. Complex formation inhibits aggregation of fibrin-coated beads, and it also results in dissociation of preformed aggregates of fibrin-coated beads. These phenomena are not caused by desorption of fibrin(ogen), indirect inhibition of thrombin activity, or mere electrostatic repulsion of charged particles. Instead, these data are consistent with the proposal that the complexed heparin interferes directly with dimer formation between fibrin molecules adsorbed to colliding beads. We describe these phenomena and their application to the development of sensitive analytical methods for quantitating heparin. Based on these observations, we also propose a role for endogenous heparin in the physiologic regulation of fibrin-mediated adhesion of surfaces.
El blog en el aula. Modelos de actividades para niveles avanzados (2012)

No pertenezco a la denominada cultura digital; no nací con un ordenador debajo del brazo, apenas un pan, como sucedía antes; la videoconsola más sofisticada que existía consistía en una pantalla gris con una línea en medio haciendo las veces de red de una pista de tenis; y en la primera clase del primer curso de informática al que asistí nos enseñaron a formatear disquetes, ya que estos venían impolutos e inmaculados. Se perdían horas antes de poder empezar a escribir y a guardar.
New synthesis of unsymmetrical azo compounds (1972)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew synthesis of unsymmetrical azo compoundsJoanna S. FowlerCite this: J. Org. Chem. 1972, 37, 3, 510–511Publication Date (Print):February 1, 1972Publication History Published online1 May 2002Published inissue 1 February 1972https://pubs.acs.org/doi/10.1021/jo00968a046https://doi.org/10.1021/jo00968a046research-articleACS PublicationsRequest reuse permissionsArticle Views238Altmetric-Citations8LEARN 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
Geochemical Reaction Modeling: Concepts and Applications (1996)

1. Modeling Overview 2. The Equilibrium State 3. Changing the Basis 4. Solving for the Equilibrium State 5. Equilibrium Models of Natural Waters 6. Activity Coefficients 7. Surface Complexation 8. Automatic Reaction Balancing 9. Uniqueness 10. Mass Transfer 11. Polythermal, Fixed, and Sliding Paths 12. Geochemical Buffers 13. Geochemical Kinetics 14. Stable Isotopes 15. Hydrothermal Fluids 16. Geothermometry 17. Evaporation 18. Sediment Diagenesis 19. Kinetic Reaction Paths 20. Waste Injection Wells 21. Petroleum Reservoirs 22. Acid Drainage
Metabolism of 32-hydroxy-24,25-dihydrolanosterol by purified cytochrome P-45014DM from yeast. Evidence for contribution of the cytochrome to whole process of lanosterol 14 alpha-demethylation. (1987)

Metabolism of 32-hydroxy-24,25-dihydrolanosterol (lanost-8-ene-3 beta,32-diol), a posturated intermediate of the 14 alpha-demethylation (removal of C-32) of 24,25-dihydrolanosterol (lanost-8-en-3 beta-ol), by a reconstituted system consisting of yeast cytochrome P-450 which catalyzes lanosterol 14 alpha-demethylation (cytochrome P-45014DM) (Yoshida, Y., and Aoyama, Y. (1984) J. Biol. Chem. 259, 1655-1660 and Aoyama, Y., Yoshida, Y., and Sato, R. (1984) J. Biol. Chem. 259, 1661-1666) and NADPH-cytochrome P-450 reductase was studied. The reconstituted system converted both 32-hydroxy-24,25-dihydrolanosterol and 24,25-dihydrolanosterol to 4,4-dimethyl-5 alpha-cholesta-8,14-dien-3 beta-ol, the 14 alpha-demethylated product of the latter. The metabolism of these compounds was inhibited by a low concentration of ketoconazole which is a potent cytochrome P-45014DM inhibitor. Affinity of cytochrome P-45014DM for 32-hydroxy-24,25-dihydrolanosterol was about 20 times higher than for 24,25-dihydrolanosterol and the cytochrome metabolized the former about 4 times faster than the latter under the experimental conditions. Spectral analysis suggested that the 32-hydroxyl group of 32-hydroxy-24,25-dihydrolanosterol interacted with the heme iron of the oxidized cytochrome and this interaction might support the high affinity of this compound for the cytochrome. These lines of evidence indicate that 32-hydroxy-24,25-dihydrolanosterol is the intermediate of the 14 alpha-demethylation of 24,25-dihydrolanosterol by cytochrome P-45014DM. It is also clear that the cytochrome catalyzes further metabolism of the 32-hydroxylated intermediate to the 14 alpha-demethylated product with higher efficiency than the 32-hydroxylation of the substrate. Cytochrome P-45014DM is thus classified as lanosterol C14-C32 lyase.
Construct High-Speed SDRAM Memory Controller Using Multiple FIFO's for AHB Memory Slave Interface (2013)

The development of SOC design methodology has increased the ability to pack a lot of logic into a single chip and thus, has paved the way for compact devices, These devices integrate several components from different vendors and performing different functionality on a single chip. Bus based communication protocols have been proved very efficient for interconnecting these components. Advanced High performance bus (AHB) is a very popular communication protocol for SOCs. This protocol supports high speed communication and is thus, very apt for high speed communication between devices. Today's issue is the speed of fetching data from memories is unable to cope up with speed of processors since processors are getting faster day by day and memories getting bulky, hence fast memory controllers are needed that eventually increases memory efficiency. Memory controller is responsible to match speed of processor and memory one and the other side, so as to enable seamless communication. The challenge in interfacing SDRAM to AHB lies in the fact that the latency of SDRAM is not one cycle and thus, the idle times of AHB bus increase and thus, leading to under utilization of bus resources. In this project we develop a memory controller that aims at reducing the latency of SDRAM access by using local fifo to temporarily store the data to and from the SDRAM.
Compact rectangular U-shaped slot microstrip patch antenna for UWB applications (2010)

In this paper, the performance of a rectangular microstrip patch antenna fed by microstrip line is designed to operate for ultra-wide band applications. It consists of a rectangular patch with U-shaped slot on one side of the substrate and a finite ground plane on the other side. The U-shaped slot and the finite ground plane are used to achieve an excellent impedance matching to increase the bandwidth. The proposed antenna is designed and optimized based on extensive 3D EM simulation studies. The proposed antenna is designed to operate over a frequency range from 3.6 to 15 GHz.
Development of Deployable Wings for Small Unmanned Aerial Vehicles Using Compliant Mechanisms (2007)

Unmanned Air Vehicles (UAVs) have recently gained attention due to their increased ability to perform sophisticated missions with less cost and/or risk than their manned counterparts. This thesis develops approaches to the use of compliant mechanisms in the design of deployable wings for small UAVs. Although deployable wings with rigid-link mechanisms have been used in the past to maintain flight endurance while minimizing required storage volume, compliant mechanisms offer many advantages in manufacturability and potential space savings due to function sharing of components. A number of compliant, deployable wing concepts are generated and a classification system for them is formed. The pool of generated concepts serves as a basis for stimulating future concept ideas. A methodology is also proposed for evaluating concepts for a given application. The approach to developing compliant designs for certain applications is illustrated through two example designs, which demonstrate key portions of the proposed design process. Each is modeled and analyzed to demonstrate viability.
Fibrinogen assays: a collaborative study of six different methods. C.I.S.M.E.L. Comitato Italiano per la Standardizzazione dei Metodi in Ematologia e Laboratorio (1991)

Abstract This collaborative study, organized by the Hemostasis Subcommittee of C.I.S.M.E.L., evaluated the accuracy, precision, and comparability of the following six widely used fibrinogen assays: total clottable fibrinogen (Blombäck and Blombäck), clotting time (Von Clauss), turbidimetry (Ellis and Stransky), Chromotime System, prothrombin time (PT)-derived, and radial immunodiffusion (RID). The same frozen samples, with normal and high contents of fibrinogen, were examined in four laboratories. The methods were calibrated with an internal standard whose fibrinogen content was determined gravimetrically. Both the Von Clauss and the RID methods were reliable, accurate, and precise, if adequate calibration was used. The PT-derived method was highly reproducible, but had some problems with accuracy. We demonstrate that an adequate calibration procedure is indispensable for reliable fibrinogen measurements whatever method is used. Because neither the calibration procedures proposed by the manufacturers nor the use of lyophilized commercial plasmas is adequate for this purpose, we urge that an international standard for fibrinogen measurement be promptly established.
Distributed Kalman filtering based on consensus strategies (2008)

In this paper, we consider the problem of estimating the state of a dynamical system from distributed noisy measurements. Each agent constructs a local estimate based on its own measurements and on the estimates from its neighbors. Estimation is performed via a two stage strategy, the first being a Kalman-like measurement update which does not require communication, and the second being an estimate fusion using a consensus matrix. In particular we study the interaction between the consensus matrix, the number of messages exchanged per sampling time, and the Kalman gain for scalar systems. We prove that optimizing the consensus matrix for fastest convergence and using the centralized optimal gain is not necessarily the optimal strategy if the number of exchanged messages per sampling time is small. Moreover, we show that although the joint optimization of the consensus matrix and the Kalman gain is in general a non-convex problem, it is possible to compute them under some relevant scenarios. We also provide some numerical examples to clarify some of the analytical results and compare them with alternative estimation strategies.
An unsupervised, on-line system for induction motor fault detection using stator current monitoring (2002)

A new method for on-line induction motor fault detection is presented in this paper. This system utilizes artificial neural networks to learn the spectral characteristics of a good motor operating on-line. This learned spectrum may contain many harmonics due to the load which corresponds to normal operating conditions. In order to reduce the number of harmonics which are continuously monitored to a manageable number, a selective frequency filter is employed. This frequency filter only passes those harmonics which are known to be of importance in fault detection, or which are continuously above a set level, to a neural net clustering algorithm. After a sufficient training period, the neural network signals a potential failure condition when a new cluster is formed, and persists for some time. Since a fault condition is found by a relative comparison to a good condition, on-line failure prediction is possible with this without requiring information on the motor or load characteristics. The detection algorithm was implemented and its performance verified on various fault types.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Field Emission Ultramicrometer (1966)

A simple, contact free, ultrasensitive distance and displacement measuring instrument has been investigated. Experiments demonstrate that the instrument is capable of operating at spacings as small as a few hundred angstroms. Calculations indicate that distances of 10−3 to 10−6 cm and less can be reproduced to within about one part in 105. With suitable calibration, distance measurements in the 10−3 to 10−6 cm range can be expected to have accuracies limited only by available calibration techniques. The instrument would be most useful as a null or differential distance measuring device. It has the unusual property that resolution improves over several orders of magnitude as the null or measurement point is approached. Since the instrument contains no optical or mechanical lever systems, or delicately balanced bridges, it has inherent long term stability. Proposed applications include: (1) measurement of ball and hole diameters (contact free), (2) differential thermal expansion cell, (3) mechanical vibration sensor, (4) surface profile delineator (contact free), and (5) surface contour delineator (contact free).
Long-term hemodynamic effects of prenalterol in patients with severe congestive heart failure. (1984)

In a controlled, randomized, double-blind study we investigated the long-term effects of the beta 1-adrenoceptor agonist prenalterol in 16 patients with severe congestive heart failure (NYHA class III or IV). Previous to and 1 week, 3 months, and 6 months after continuous oral intake of 40 to 120 mg prenalterol a day, catheterization of the right heart combined with an ergometer test was carried out; M mode and two dimensional echocardiograms as well as systolic time intervals were also recorded. With prenalterol the heart rate increased within 1 week from 81 +/- 7 to 90 +/- 7 beats/min (mean +/- SD) (p less than .05) and remained increased after 3 months (93 +/- 9 beats/min, p less than .01) and 6 months (91 +/- 6 beats/min, p less than .05). After 1 week the cardiac index rose from 2.7 +/- 0.7 to 3.3 +/- 0.7 l/min/m2 (p less than .01), and after 3 and 6 months it fell again to 3.0 +/- 0.9 l/min/m2 and 2.9 +/- 0.7 l/min/m2, respectively. In the ergometer test the improvement in performance was not significant. The mean velocity of circumferential fiber shortening initially increased from 0.58 +/- 0.20 to 0.79 +/- 0.28 circumferences/sec (p less than .01), but dropped after 3 months to 0.62 +/- 0.31 circumferences/sec. The ejection fraction determined from the two-dimensional echocardiogram rose after 1 week from 20 +/- 10 to 27 +/- 12% (p less than .05), but decreased again after 3 months (23 +/- 11%) and 6 months (20 +/- 10%).(ABSTRACT TRUNCATED AT 250 WORDS)
Underwater Superoleophilic to Superoleophobic Wetting Control on the Nanostructured Copper Substrates (2013)

Surfaces with controlled underwater oil wettability would offer great promise in the design and fabrication of novel materials for advanced applications. Herein, we propose a new approach based on self-assembly of mixed thiols (containing both HS(CH2)9CH3 and HS(CH2)11OH) on nanostructured copper substrates for the fabrication of surfaces with controlled underwater oil wettability. By simply changing the concentration of HS(CH2)11OH in the solution, surfaces with controlled oil wettability from the underwater superoleophilicity to superoleophobicity can be achieved. The tunable effect can be due to the synergistic effect of the surface chemistry variation and the nanostructures on the surfaces. Noticeably, the amplified effect of the nanostructures can provide better control of the underwater oil wettability between the two extremes: superoleophilicity and superoleophobicity. Moreover, we also extended the strategy to the copper mesh substrates and realized the selective oil/water separation on the as-prepared copper mesh films. This report offers a flexible approach of fabricating surfaces with controlled oil wettability, which can be further applied to other ordinary materials, and open up new perspectives in manipulation of the surface oil wettability in water.
Short-term transient attenuations in single-mode optical fibers due to hydrogen (1987)

A relatively short-term transient mechanism of increasing optical fiber attenuation from the presence of hydrogen (H2) has been observed in single-mode optical fibers. The attenuation increases have a distinctive pattern of spectral absorption peaks. Peaks at 1.25, 1.53, and 1.64 μm are predominantly transient, whereas peaks at 1.33, 1.38, and 1.44 μm are predominantly permanent (Fig. 1). The magnitude of attenuation increases correlation with excess absorption at 0.63 μm (Fig. 2) reflecting the number of active detect sites susceptible to the phenomenon. The product of excess absorptions1 at 0.24 and 0.63 pm is believed to be a constant. The defect sites can be in either or both the core and cladding of the fiber.
Thermally activated delayed S1 fluorescence of aromatic thiones (1986)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermally activated delayed S1 fluorescence of aromatic thionesAndrzej Maciejewski, Marian Szymanski, and Ronald P. SteerCite this: J. Phys. Chem. 1986, 90, 23, 6314–6318Publication Date (Print):November 1, 1986Publication History Published online1 May 2002Published inissue 1 November 1986https://pubs.acs.org/doi/10.1021/j100281a051https://doi.org/10.1021/j100281a051research-articleACS PublicationsRequest reuse permissionsArticle Views781Altmetric-Citations68LEARN 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 options Get e-Alerts
Prior Guided GAN Based Semantic Inpainting (2020)

Contemporary deep learning based semantic inpainting can be approached from two directions. First, and the more explored, approach is to train an offline deep regression network over the masked pixels with an additional refinement by adversarial training. This approach requires a single feed-forward pass for inpainting at inference. Another promising, yet unexplored approach is to first train a generative model to map a latent prior distribution to natural image manifold and during inference time search for the best-matching prior to reconstruct the signal. The primary aversion towards the latter genre is due to its inference time iterative optimization and difficulty to scale to higher resolution. In this paper, going against the general trend, we focus on the second paradigm of inpainting and address both of its mentioned problems. Most importantly, we learn a data driven parametric network to directly predict a matching prior for a given masked image. This converts an iterative paradigm to a single feed forward inference pipeline with around 800X speedup. We also regularize our network with structural prior (computed from the masked image itself) which helps in better preservation of pose and size of the object to be inpainted. Moreover, to extend our model for sequence reconstruction, we propose a recurrent net based grouped latent prior learning. Finally, we leverage recent advancements in high resolution GAN training to scale our inpainting network to 256X256. Experiments (spanning across resolutions from 64X64 to 256X256) conducted on SVHN, Standford Cars, CelebA, CelebA-HQ and ImageNet image datasets, and FaceForensics video datasets reveal that we consistently improve upon contemporary benchmarks from both schools of approaches.
Oscillations of secretion driven by oscillations of cytoplasmic Ca2+ as evidences in single pancreatic islets. (1993)

It is often assumed, but has not been demonstrated, that the oscillations of cytoplasmic calcium (Ca2+i) that occur in various secretory cells induce oscillations in secretion. Here, we have used single pancreatic islets from normal mice to monitor simultaneously insulin release and Ca2+i in beta-cells for periods up to 25 min. Ca2+i and insulin secretion were found to oscillate in synchrony during stimulation by glucose. This synchrony persisted when the frequency of both events changed spontaneously or upon addition of the hypoglycaemic sulfonylurea tolbutamide, or when their relative amplitudes varied. Repolarizing the beta-cell membrane with diazoxide abolished both Ca2+i and insulin oscillations. In contrast, epinephrine suppressed insulin oscillations in spite of the persistence of Ca2+i oscillations. This study is the first direct demonstration that, in an intact organ, sustained oscillations of Ca2+i induced by a physiological stimulus entrain synchronous oscillations of the functional response, and that both events can vary simultaneously or be dissociated depending on the experimental conditions.