gebhart/patrepeval huggingface dataset:
Nonlinear ferromagnetic resonance in permalloy films: A nonmonotonic power-dependent frequency shift (2010)

We present experimental data on the power-dependent shift in the ferromagnetic resonance frequency of permalloy ribbons magnetized in plane. We find the sign of the shift depends on the strength of the applied static magnetic field. For low applied fields, the power-dependent shift is upwards in frequency, while for high fields the mode softens with increasing power. We summarize two theoretical studies that are qualitatively compatible with this result. One is an analytic treatment of very thin films and the second a numerical simulation of a thin rectangular prism.
Analysis of the antigen-specific T cell response in reactive arthritis by flow cytometry (2000)

The frequency of antigen-specific T cells to Chlamydia- and Yersinia-derived antigens in the SF of ReA patients is between 1:200 and 1:50. Both the chlamydial Hsp60 and MOMP are dominant T cell antigens in Chlamydia-induced ReA. In patients with Chlamydia-induced ReA, we detected antigen-specific IL-10 secretion, which might mediate an inhibition of effective bacterial clearance.
The effect of doping transition metal oxides on copper manganese oxides for the catalytic oxidation of CO (2014)

A series of copper manganese oxides doped with transition metal oxides were prepared by co-precipitation using copper acetate and manganese acetate as precursors, ammonium bicarbonate as precipitant, and metal nitrates as dopants. The catalysts were characterized by N2 adsorption-desorption, X-ray powder diffraction, temperature-programmed reduction, and in situ diffuse reflectance infrared Fourier transform spectroscopy. The results showed that doping transition metal oxides into copper manganese oxides can modify the CO adsorption ability of the catalyst and thus affect the catalytic oxidation of CO.
Decoherence and dissipation of a quantum harmonic oscillator coupled to two-level systems (2008)

We derive and analyze the Born-Markov master equation for a quantum harmonic oscillator interacting with a bath of independent two-level systems. This hitherto virtually unexplored model plays a fundamental role as one of the four ``canonical'' system-environment models for decoherence and dissipation. To investigate the influence of further couplings of the environmental spins to a dissipative bath, we also derive the master equation for a harmonic oscillator interacting with a single spin coupled to a bosonic bath. Our models are experimentally motivated by quantum-electromechanical systems and micron-scale ion traps. Decoherence and dissipation rates are found to exhibit temperature dependencies significantly different from those in quantum Brownian motion. In particular, the systematic dissipation rate for the central oscillator decreases with increasing temperature and goes to zero at zero temperature, but there also exists a temperature-independent momentum-diffusion (heating) rate.
Experimental Comparison of an Annular Floating Offshore Wind Turbine Hull Against Past Model Test Data (2019)

Abstract Floating offshore wind turbine (FOWT) hull technologies are evolving rapidly with many technically viable designs. However, a commercially dominant architecture has yet to emerge. Early hull designs including semisubmersible, spar, and tension leg platforms were largely derived from offshore oil and gas technologies, but recent developments in the commercial application and optimization of FOWTs have resulted in a number of unique, FOWT-specific hull configurations. One hull design of interest includes the application of a moonpool to aid in mitigating platform motion in the presence of waves. A version of this annular hull has been deployed in France and Japan. In this paper, a 6-MW version of an annular hull is studied through experimental model testing and numerical analysis. The primary portion of this work involves testing a 1/100th-scale model in the Harold Alfond Wind Wave Ocean Engineering Laboratory at the University of Maine. A secondary component of this work investigates the capability of ANSYS aqwa, a typical commercial hydrodynamic software, to recreate the wave-induced motion of a FOWT hull containing a moonpool. An additional secondary component of this study compares the wave-only performance of the annular hull to experimental data obtained for the DeepCwind semisubmersible, spar, and tension leg platform to provide context for the measured response. The results obtained show that ANSYS aqwa can adequately predict the gross response of the annular hull motion and that the moonpool design tested often exhibits greater motion than the systems tested during the DeepCwind campaign.
Binding Proteins in Development of On-Line Postcolumn Reaction Detection Systems for Liquid Chromatography (1992)

The use of binding assays for analyte detection following HPLC separation provides a powerful tool for the determination of metabolites in biological samples. Such an approach, combines efficiently the superior selectivity of HPLC with the high detection capability of binding assays. In addition, it allows for multiple analyte determinations in the same sample. Recent advances in this area regarding the use of the binding protein avidin in the development of on-line postcolumn reaction detection systems demonstrate the merits of the technique.
Acute myocardial infarction in the neonatal period (2002)

We describe two neonates presenting with myocardial infarction, due to two different aetiologies of this extremely rare but potentially treatable condition, and discuss the management. One neonate had myocardial infarction complicating enteroviral myocarditis and recovered completely. The second had fatal myocardial infarction due to thrombosis of the left coronary artery. Although rare, the attending paediatrician should have a high index of suspicion when evaluating a neonate with acute onset of collapse. Electrocardiographic changes are diagnostic, but further echocardiographic assessment and prompt management at a tertiary cardiac centre are advised.
A Matrosov Theorem for Adversarial Markov Decision Processes (2013)

Matrosov's relaxation of Lyapunov conditions for uniform global asymptotic stability in time-varying systems is extended to stochastic, set-valued discrete-time systems. Nested Matrosov functions are used to give conditions for stability that complement invariance principles for time-invariant systems. Unlike invariance principles, Matrosov functions also can be applied to general time-varying systems.
An efficient procedure for the preparation of chiral β-substituted (E)-crotylsilanes: Application of a rhodium(II) catalyzed silylformylation of terminal alkynes (1995)

Functionalized β-substituted (E)-crotylsilanes (R)-7 and (S)-8, bearing an alkyl or aryl group adjacent to the stereogenic C-Si center have been synthesized in an efficient four-step procedure initiated with a regio- and stereoselective silylformylation of a terminal alkyne catalyzed by dirhodium(II) perfluorobutyrate.
A Krylov subspace multistage decomposition of the transmit Wiener filter (2005)

Besides methods based on eigensubspaces, the reduced-rank multistage Wiener filter (MSWF) is a well-known approach for the approximation of the Wiener filter, the optimum linear receive filter in the minimum mean square error sense, in a lower-dimensional subspace in order to reduce computational complexity and enhance performance in case of low sample support. Analogous, the transmit Wiener filter (TxWF) is the optimum linear filter at the transmitter side where the receiver is kept simple since it applies only a scalar weighting. We use the principles of the MSWF to derive a multistage decomposition of the TxWF which we denote transmit multistage Wiener filter (TxMSWF). In addition, we will show that the reduced-rank TxMSWF can be seen as an approximation of the TxWF in a Krylov subspace. Simulation results reveal that the TxMSWF achieves near optimum performance for relatively low rank. Thus, it is an interesting alternative to low complexity approximations of the TxWF in eigensubspaces.
Video haze removal and poisson blending based mini-mosaics for wide area motion imagery (2016)

In this work we consider three different haze removal approaches to dehaze videos with applications wide area motion imagery (WAMI). Out of three, we mainly focused on dark channel haze removal method. Most of the haze-free nonsky outdoor images contain at least one color channel with average intensity close to zero; this channel is called dark channel and provides a good estimate of the transmission of haze which is used to remove haze from image. By utilizing neighborhood consistency in temporal direction of videos we apply haze removal algorithm sequentially. Once the haze-free images are produced, we register them in order to generate mini-mosaics and apply poison blending to remove seam effect from the mini-mosaics. Additionally, in order to avoid dehazing each image, we create the mini-mosaic first and the apply dehazing on the mini-mosaic only. Experimental results on synthetic image sequences and WAMI indicate we obtain good haze-free and mosaiced results in both approaches.
Structural comparison of 2 divergent honeybee olfactory binding proteins : disulfide bond arrangement, secondary structure and oligomerization (2001)

National audience
Misbehavior detection in the Internet of Things: A network-coding-aware statistical approach (2016)

In the Internet of Things (IoT) context, the massive proliferation of wireless devices implies dense networks that require cooperation for the multihop transmission of the sensor data to central units. The altruistic user behavior and the isolation of malicious users are fundamental requirements for the proper operation of any cooperative network. However, the introduction of new communication techniques that improve the cooperative performance (e.g., network coding) hinders the application of traditional schemes on malicious users detection, which are mainly based on packet overhearing. In this paper, we introduce a non-parametric statistical approach, based on the Kruskal-Wallis method, for the detection of user misbehavior in network coding scenarios. The proposed method is shown to effectively handle attacks in the network, even when malicious users adopt a smart probabilistic misbehavior.
Stabilization of Metal Nanoparticles in Cubic Mesostructured Silica and Its Application in Regenerable Deep Desulfurization of Warm Syngas (2009)

Metal and metal oxide nanoparticles supported on high surface area materials are widely used in industry for fuel and chemical production and for environmental pollution control, but preventing nanosized particle sintering has remained a great challenge. In this paper, we report that Ni−Cu alloy nanoparticles can be effectively stabilized in cubic mesostructured silica (SBA-16) following a conventional impregnation and thermal treatment process. The three-dimensional interconnected cage structure of the mesoporous SBA-16 allows good accessibility of reactant gas molecules to the metal nanoparticles and confines these particles within its nanosized cages. This confinement hinders metal nanoparticle migration and sintering under harsh conditions. A new class of regenerable metal-based adsorbents which can remove sulfur impurities from warm syngas stream down to less than 60 parts per billion by volume (ppbv) is described. This same confinement strategy is expected to have impact for minimizing sintering or particle coarsening of nanosized materials employed in other applications.
Thermodynamic stability of non-stoichiometric SrFeO<sub>3−δ</sub>: a hybrid DFT study (2019)

SrFeO3-δ is a mixed ionic-electronic conductor with a complex magnetic structure that reveals a colossal magnetoresistance effect. This material and its solid solutions are attractive for various spintronic, catalytic and electrochemical applications, including cathodes for solid oxide fuel cells and permeation membranes. Its properties strongly depend on oxygen non-stoichiometry. Ab initio hybrid functional approach was applied herein to study the thermodynamic stability of a series of SrFeO3-δ compositions with several non-stoichiometries δ, ranging from 0 to 0.5 (SrFeO3-SrFeO2.875-SrFeO2.75-SrFeO2.5) as a function of temperature and oxygen pressure. The results obtained by two approaches, in which either (i) all electrons at Fe atoms explicitly described or (ii) inner core electrons at Fe atoms are replaced by effective core potential, are compared. Based on our calculations, phase diagrams were constructed, allowing the determination of environmental conditions for the existence of stable phases. It is shown that (within an employed model) only the SrFeO2.5 phase appears to be stable. The stability region for this phase was re-drawn on the contour map of oxygen chemical potential, presented as a function of temperature and oxygen partial pressure. A similar analysis was also performed using experimental Gibbs energies of perovskite formation from the elements. The present modelling strongly suggest a significant attraction between neutral oxygen vacancies. These vacancies are created during a series of the abovementioned SrFeO3-δ mutual transformations accompanied by oxygen release.
Paranasal sinus cholesterol granuloma: systematic review of diagnostic and management aspects (2012)

Paranasal sinus CG is most commonly observed in middle-aged males, arises in the frontal sinus, and typically presents with orbital symptoms. Both open and endoscopic techniques can be used with high success rate. The present study represents the first attempt in the literature to construct a clinical profile of this rare entity.
Role of Bentonite Colloids and Desorption Kinetics in Transport of Cesium and Americium in a Groundwater/ Fracture Fill System (2024)

Abstract Not Provided
Clinical neurophysiology in diagnostics (2000)

Clinical neurophysiology is a branch of medicine concerned with the measurement of the electrical activity of the central nervous system, peripheral nerves and muscles.
ChemInform Abstract: ALLOPHANE AND HALLOYSITE MINERALS. STRUCTURAL CONSIDERATIONS (1981)

Abstract Neuseeländische Allophan‐ und Halloysit‐Proben werden mit Hilfe von Sorptions‐, DTA‐, IR‐, kristallographischen und Mößbauer‐Methoden untersucht.
Studies of the mechanism of action of asulam in plants. Part II: Effect of asulam on the biosynthesis of folic acid (1981)

Abstract The possible relationship between folate levels in plants and their tolerance to asulam has been examined. Plants with a high content of folates were relatively less susceptible to asulam. There was evidence of a depletion of the folates in the shoots of plants treated with asulam, either alone at 1. 1 kg ha −1 or in combination with 4, 6‐diamino‐1‐(3, 4‐dichlorophenyl)‐1, 2‐dihydro‐2, 2‐dimethyl‐1, 3, 5‐triazine (DCDT) at 1.1 kg ha −1. In wheat shoot tips ( Triricum estivum L.), asulam at 1.1 kg ha −1 reduced the levels of the N 5 ‐methyl, N 10 ‐formyl and N 5 ‐formyl derivatives of 5, 6, 7, 8‐tetrahydrofolates, particularly when applied in combination with DCDT. Studies with cell‐free extracts of wheat seedlings revealed that asulam inhibited the enzymic synthesis of 7, 8‐dihydro‐pteroateina manner similar to sulphanilamide inhibition. The biochemical site of action of asulam in plants is discussed.
Ethoxylated Alcohols at Solid Hydrocarbon Surfaces (1990)

Time - resolved spectra of a solid hydrocarbon layer on the surface of an internal reflection element, interacting with an aqueous solution of a nonionic surfactant, can be used to monitor the detergency process. Changes in the intensity and frequency of the CH2 stretching bands, and the appearance of defect bands due to gauche conformers indicate penetration of surfactant into the hydrocarbon layer. Perturbation of the hydrocarbon crystal structure, followed by displacement of solid hydrocarbon from the IRE surface, are important aspects of solid soil removal. Surfactant bath temperature influences detergency through its effects on both the phase behavior of the surfactant solution and its penetration rate into the hydrocarbon layer.
Highly excited atoms (1977)

The major accomplishment under this contract was the innovation of techniques for the production and detection of highly excited atoms (Rydberg atoms), and a series of studies on the properties of Rydberg atoms in strong electric fields. Partly as a result of this work, the study of Rydberg systems has developed into an important new subfield of atomic physics during the past few years; already there have been two international meetings and several sessions at national meetings devoted to the subject. Much of the experimental work uses the combination of field ionization and atomic beams techniques developed under this contract. (Author)
Human chorionic gonadotropin beta-subunit nicking enzymes in pregnancy and cancer patient serum. (1994)

hCG is a dimer composed of an alpha- and a beta-subunit, joined noncovalently. In addition to the hCG dimer, uncombined alpha- and beta-subunits (free beta) and nicked hCG and free beta molecules (cleaved at 44-45 or 47-48) can be detected in the circulation. Of these circulating molecules, only the intact hCG dimer fully expresses biological activity. The pathways that dissociate, nick, and degrade hCG and beta-subunit molecules in pregnancy are unknown and could have a major role in regulating hormone levels. Immunoassays for intact (nonnicked) hCG and intact (beta-subunit (with < 1% detection of nicked molecules) and a subtractive immunoassay system for measuring nicked hCG levels have been described previously. A multiantibody scavenger assay is described here for measuring nicked beta-subunit levels (< 6% detection of intact beta-subunit). In this report we use these four assays to assess conversion of intact hCG or beta-subunit to nicked forms over time (nicking enzyme activities) in control (healthy nonpregnant), pregnant, and cancer patient serum samples. Pools of pregnancy and control sera were supplemented with intact hCG and its dissociated beta-subunit and incubated at 37 C. Intact and nicked molecule measurements were made between 0-48 h. In two different pools of control sera, no loss of intact hCG or intact beta-subunit and no significant gain in nicked hCG or nicked beta-subunit were detected over 48 h. This indicated a lack of nicking enzyme activity in control serum. In two different pools of first trimester pregnancy sera, we found no obvious loss of intact hCG or gain of nicked hCG levels over 48 h. However, we found 70% and 62% losses (pools 1 and 2) of intact beta-subunit and 51% and 39% gains of nicked beta-subunit over the same time period. We inferred that an uncombined or free beta-subunit-modifying activity was present in pregnancy serum. We repeated the pregnancy serum experiment with six different concentrations of beta-subunit (0.62-29 mg/L). A linear relationship, percent nicking against time, existed for the six concentrations for up to 6 h at 37 C (r = 0.97); after that, the rate of nicking declined. A plot of rate against concentration against revealed a classical Michaelis-Menten enzyme relationship (logarithmic regression, r = 0.96). The pregnancy serum beta-subunit nicking activity was partially purified by gel filtration. A single peak of activity emerged, eluting between the 150,000-443,000 mol wt standards.(ABSTRACT TRUNCATED AT 400 WORDS)
Brownian Circuits (2013)

Random fluctuations will be a major factor interfering with the operation of nanometer scale electronic devices. This article presents circuit architectures that can exploit such fluctuations, if signals have a particle-like (discrete, token-based) character. We define an abstract circuit primitive that, though lacking functionality when used with fluctuation-free signals, becomes universal when fluctuations are allowed. Key to the power of a signal’s fluctuations is the ability to explore the state space of a circuit. This ability is used to resolve deadlock situations, which could otherwise only be averted by increased design complexity. The results in this article suggest that in the design of future computers, signal fluctuations, rather than being an impediment to be avoided at any cost, may be an important ingredient to achieve efficient operation.
A Night Vision Device as an Aid for Patients With Retinitis Pigmentosa (1973)

Marked improvements in visual thresholds were observed in 14 patients with retinitis pigmentosa and in two patients with stationary night-blindness with myopia tested under scotopic conditions with a Generation I night vision device. All had visual acuities under scotopic conditions with the device that were comparable to their best visual acuities under photopic conditions. Psychophysical studies showed this device provided sufficient light amplification to allow cone function under dim scotopic conditions. Stimuli too dim to elicit a cone electroretinogram (ERG) without the device could elicit one with it. Results with this Generation I device as well as recent advances in microchannel technology (Generation II) suggest that a practical night vision device could be developed for patients with retinitis pigmentosa and other night-blinding conditions.
Characterization of Mimivirus DNA Topoisomerase IB Suggests Horizontal Gene Transfer between Eukaryal Viruses and Bacteria (2005)

Mimivirus, a parasite of Acanthamoeba polyphaga, is the largest DNA virus known; it encodes dozens of proteins with imputed functions in nucleic acid transactions. Here we produced, purified, and characterized mimivirus DNA topoisomerase IB (TopIB), which we find to be a structural and functional homolog of poxvirus TopIB and the poxvirus-like topoisomerases discovered recently in bacteria. Arginine, histidine, and tyrosine side chains responsible for TopIB transesterification are conserved and essential in mimivirus TopIB. Moreover, mimivirus TopIB is capable of incising duplex DNA at the 5'-CCCTT cleavage site recognized by all poxvirus topoisomerases. Based on the available data, mimivirus TopIB appears functionally more akin to poxvirus TopIB than bacterial TopIB, despite its greater primary structure similarity to the bacterial TopIB group. We speculate that the ancestral bacterial/viral TopIB was disseminated by horizontal gene transfer within amoebae, which are permissive hosts for either intracellular growth or persistence of many present-day bacterial species that have a type IB topoisomerase.
Mosaic evolution of the insulin-like growth factors. Organization, sequence, and expression of the rat insulin-like growth factor I gene. (1987)

Insulin-like growth factor I (IGF-I) plays a major role in mammalian growth and regenerative processes as a mediator of many of the biological effects of growth hormone. We have demonstrated recently that the human IGF-I gene is transcribed and processed into distinct messenger RNA molecules, each of which directs the synthesis of unique IGF-I-containing peptides. As a means to determine whether a similar model of IGF-I gene organization and expression is the paradigm in mammals and as an initial step in devising experimental approaches to the study of regulation of IGF-I biogenesis, we have isolated and characterized the rat IGF-I gene. The rat gene, like its human counterpart, is very large, extending over at least 73 kilobases, and is composed of five exons subdivided by four introns. As in the human example, the rat IGF-I gene hybridizes to several messenger RNAs: 0.8-1.2, 1.6-2.1, and 7.8 kilobases. There is extensive nucleotide and amino acid sequence conservation between the two genes. The predicted mature rat IGF-I protein is identical to the human peptide in 67 of 70 residues. A comparably high degree of amino acid sequence identity is also found for both the amino- and carboxyl-terminal extension peptides, suggesting that, like mature IGF-I, the extension molecules may have physiological function.