gebhart/patrepeval huggingface dataset:
Transonic Flow Around Rotor Blade Elements (1975)

An analytical/numerical method for calculating blade-to-blade transonic flow fields around blade elements of an axial compressor rotor of a turbomachine is presented. Radius variation and stream sheet convergence are included. The analysis considers the time-dependent Navier-Stokes equations in conservation-law form which allows for viscous shock wave formation. A discretized method of characteristics is used to determine the boundary conditions along the blade surface and exit plane. An explicit, time-dependent, second-order, finite difference technique is utilized to numerically solve these partial differential equations in a transformed computational plane. Comparison of numerical results with cascade and rotor data indicate good agreement for blade surface pressure distributions and mixed-out exit conditions.
Laser spectroscopy and gas-phase chemistry in CVD (1988)

A coordinated program of experimental and theoretical research into the fundamental mechanisms of CVD is described. The experimental part of the program involves the use of laser spectroscopic techniques for in situ measurements during CVD. The theoretical part of the program consists of a computer model that contains a detailed description of the coupled fluid mechanics and gas‐phase chemical kinetics for silane CVD.
Lattice Dynamics of Cubic SiC (1969)

The phonon-dispersion curves in the various symmetry directions for cubic SiC have been obtained using a rigid-ion model consisting of short-range central and noncentral interactions and long-range Coulomb interactions among ions of appropriate effective ionic charge. The calculated dispersion in the [111] direction compares well with a recent experimental determination by Feldman et al., who studied the Raman spectra of the various polytypes of SiC. The phonon density of states and the Debye characteristic temperature of SiC have also been calculated.
Structure−Activity Relationships in 1,4-Benzodioxan-Related Compounds. 6. Role of the Dioxane Unit on Selectivity for α<sub>1</sub>-Adrenoreceptor Subtypes (1999)

WB 4101-related benzodioxans 3-9 were synthesized, and their biological profiles at alpha(1)-adrenoreceptor subtypes and 5-HT(1A) serotoninergic receptors were assessed by binding assays in CHO and HeLa cells membranes expressing the human cloned receptors. Furthermore, receptor selectivity of selected benzodioxan derivatives was further determined in functional experiments in isolated rat vas deferens (alpha(1A)) and aorta (alpha(1D)) and guinea pig spleen (alpha(1B)), in additional receptor binding assays in rat cortex membranes containing alpha(2)-adrenoreceptors and 5-HT(2) serotoninergic receptors, and in rat striatum membranes containing D(2) dopaminergic receptors. An analysis of the results of receptor binding experiments for benzodioxan-modified derivatives 3-9 showed high affinity and selectivity toward the alpha(1a)-adrenoreceptor subtype for compounds 3-5 and 7 and a reversed selectivity profile for 9, which was a selective alpha(1d) antagonist. Furthermore, the majority of structural modifications performed on the prototype 1 (WB 4101) led to a marked decrease in the affinity for 5-HT(1A) serotoninergic receptors, which may have relevance in the design of selective alpha(1A)-adrenoreceptor antagonists. The exception to these findings was the chromene derivative 8, which exhibited a 5-HT(1A) partial agonist profile.
ChemInform Abstract: High Temperature Reaction of Iodothiophene (I) with Dimethyl Chalcogenides (II), (VIII). (1992)

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.
A multiband MIMO receiver with ordered successive detection for cognitive radio (2011)

Cognitive radios are of interest because they are capable of high frequency utilization efficiency. In a cognitive radio, multiband receivers are required to make use of unused frequency bands. On the other hand, MIMO (multiple-input multiple-output) spatial multiplexing is also used to increase transmission capacity. This paper proposes a multiband MIMO receiver with ordered successive detection based on heterodyne reception. Because the use of an RF-BPF (radio frequency-bandpass filter) with a wide pass band is required in the receiver for multiband reception, the heterodyne receiver suffers from image-band interference. Therefore, the proposed receiver is designed not only to detect spatially multiplexed signals but also to suppress image-band interference. Computer simulation shows that the proposed receiver achieves superior BER performance even in the presence of strong image-band interference signals.
Absence of beta mRNA in beta0-thalassemia in Kurdish Jews (1978)

Abstract We report the characterization of the amount of beta mRNA in a Kurdish Jewish population with beta0-thalassemia using the same methods employed for characterization of the Catania and Ferrara beta0 patients. We found very low amounts of beta mRNA sequences, consistent with the presence of beta0-thalassemia of the beta mRNA-negative population type. In addition, no globin gene deletion was detected that could account for the absence of beta mRNA.
Controlled Double‐Sensitivity of Microgels Applied to Electronically Adjustable Chemostats (2007)

The controlled double-sensitivity of stimuli-responsive polymers (see figure) can be used to adjust their functional properties. The ion or solvent concentration, automatically controlled by the micro-chemostat, is adjusted by the temperature of a thermosensitive hydrogel corresponding to its phase transition concentration.
Neuromedin B Expression Defines the Mouse Retrotrapezoid Nucleus (2017)

The retrotrapezoid nucleus (RTN) consists, by definition, of Phox2b-expressing, glutamatergic, non-catecholaminergic, noncholinergic neurons located in the parafacial region of the medulla oblongata. An unknown proportion of RTN neurons are central respiratory chemoreceptors and there is mounting evidence for biochemical diversity among these cells. Here, we used multiplexed <i>in situ</i> hybridization and single-cell RNA-Seq in male and female mice to provide a more comprehensive view of the phenotypic diversity of RTN neurons. We now demonstrate that the RTN of mice can be identified with a single and specific marker, <i>Neuromedin B</i> mRNA (<i>Nmb</i>). Most (∼75%) RTN neurons express low-to-moderate levels of <i>Nmb</i> and display chemoreceptor properties. Namely they are activated by hypercapnia, but not by hypoxia, and express proton sensors, TASK-2 and Gpr4. These <i>Nmb</i>-low RTN neurons also express varying levels of transcripts for <i>Gal</i>, <i>Penk</i>, and <i>Adcyap1</i>, and receptors for substance P, orexin, serotonin, and ATP. A subset of RTN neurons (∼20-25%), typically larger than average, express very high levels of <i>Nmb</i> mRNA. These <i>Nmb</i>-high RTN neurons do not express <i>Fos</i> after hypercapnia and have low-to-undetectable levels of <i>Kcnk5</i> or <i>Gpr4</i> transcripts; they also express <i>Adcyap1</i>, but are essentially devoid of <i>Penk</i> and <i>Gal</i> transcripts. In male rats, <i>Nmb</i> is also a marker of the RTN but, unlike in mice, this gene is expressed by other types of nearby neurons located within the ventromedial medulla. In sum, <i>Nmb</i> is a selective marker of the RTN in rodents; <i>Nmb</i>-low neurons, the vast majority, are central respiratory chemoreceptors, whereas <i>Nmb</i>-high neurons likely have other functions.<b>SIGNIFICANCE STATEMENT</b> Central respiratory chemoreceptors regulate arterial PCO<sub>2</sub> by adjusting lung ventilation. Such cells have recently been identified within the retrotrapezoid nucleus (RTN), a brainstem nucleus defined by genetic lineage and a cumbersome combination of markers. Using single-cell RNA-Seq and multiplexed <i>in situ</i> hybridization, we show here that a single marker, <i>Neuromedin B</i> mRNA (<i>Nmb</i>), identifies RTN neurons in rodents. We also suggest that >75% of these <i>Nmb</i> neurons are chemoreceptors because they are strongly activated by hypercapnia and express high levels of proton sensors (<i>Kcnk5</i> and <i>Gpr4</i>). The other RTN neurons express very high levels of <i>Nmb</i>, but low levels of <i>Kcnk5/Gpr4/pre-pro-galanin/pre-pro-enkephalin</i>, and do not respond to hypercapnia. Their function is unknown.
Phytochelatin Synthase, a Dipeptidyltransferase That Undergoes Multisite Acylation with γ-Glutamylcysteine during Catalysis (2004)

Phytochelatin (PC) synthase has been assumed to be a gamma-glutamylcysteine dipeptidyl transpeptidase (EC 2.3.2.15) and, more recently, as exemplified by analyses of the immunopurified recombinant enzyme from Arabidopsis thaliana (AtPCS1-FLAG), has been shown to catalyze a PC synthetic reaction with kinetics that approximates a bisubstrate-substituted enzyme mechanism in which millimolar concentrations of free GSH and micromolar concentrations of heavy metal.GSH thiolates (e.g. cadmium.GS(2)) or millimolar concentrations of S-alkylglutathiones serve as cosubstrates. Here, we show, by direct analyses of the stoichiometry of AtPCS1-FLAG-catalyzed PC synthesis, the kinetics and stoichiometry of acylation of the enzyme and release of free glycine from gamma-Glu-Cys donors, and the effects of the Cys-to-Ser or -Ala and Ser-to-Ala substitution of conserved residues in the catalytic N-terminal half of the enzyme, that PC synthase is indeed a dipeptidyltransferase that undergoes gamma-Glu-Cys acylation at two sites during catalysis, one of which, in accord with a cysteine protease model, likely corresponds to or is at least tightly coupled with Cys(56). The identity of the second site of enzyme modification remains to be determined, but it is distinguishable from the first Cys(56)-dependent site, which is amenable to gamma-Glu-Cys acylation by free GSH, because its acylation not only depends on the provision of Cd(2+) or GSH with a blocked, S-alkylated thiol group, but is also necessary for net PC synthesis. We conclude that des-Gly-PCs are not generated as an immediate by-product, but rather that the enzyme catalyzes a dipeptidyl transfer reaction in which some of the energy liberated upon cleavage of the Cys-Gly bonds of the gamma-Glu-Cys donors in the first phase of the catalytic cycle is conserved through the formation of a two site-substituted gamma-Glu-Cys acyl-enzyme intermediate whose hydrolysis provides the energy required for the formation of the new peptide bond required for the extension of PC chain length by one gamma-Glu-Cys repeat per catalytic cycle.
An Approximate Method for Incommensurate Phase Transitions and Its Application to NaNO2 (1979)

The temperature dependence of the wavevector qm of the maximum fluctuating mode and the wavevector q0 characterizing the ordered state in incommensurate phase are obtained by taking account of the difference of fluctuation between the short range and long range interactions. The former interaction is treated by the Bethe-Peierls approximation and the latter by the molecular field approximation. The application to NaNO2 gives a qualitative explanation of the temperature dependence of qm and susceptibility χ(qm) above the critical temperature except the critical region. It is pointed out that the temperature dependence of qm and q0 shows a critical behavior.
Barrels in the Desert: Meeting Report The Sde Boker Workshop on Neocortical Circuits (1997)

review of the meeting according to the major themes that emerged from the presentations and discussions,Department of Biological Sciences Columbia University adopting the convention of citing only the individual presenting the work and limiting citations to the essen-New York, New York 10027
ChemInform Abstract: Infrared Studies of CO and/or NO Adsorption on Reduced W/Al2O3 Catalysts. (1991)

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.
Determinations of Molecular Weight of Lignin Degradation Products by Three Methods (1958)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDeterminations of Molecular Weight of Lignin Degradation Products by Three MethodsS. K. Gross, Kyosti. Sarkanen, and Conrad. SchuerchCite this: Anal. Chem. 1958, 30, 4, 518–521Publication Date (Print):April 1, 1958Publication History Published online1 May 2002Published inissue 1 April 1958https://pubs.acs.org/doi/10.1021/ac60136a020https://doi.org/10.1021/ac60136a020research-articleACS PublicationsRequest reuse permissionsArticle Views399Altmetric-Citations19LEARN 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
Experimental verification of ensemble model for scattering by microbubbles population in a contrast agent (2002)

A theoretical contrast agent model, extending existing single bubble models to a population of simulated bubbles, was previously reported to produce time-domain scattered signals which compared well qualitatively to experiments. Here, experiments were carried out to test this model quantitatively. DPM-115 (Dupont-Merck Inc) flowing in a chamber was exposed to 5 MHz pulsed ultrasound with various bandwidths. Scattered signals were detected at 90/spl deg/ by a broadband receive transducer. The experimental results generally confirm the authors' model for predicting scattered signals, but the measured second harmonic scattering is 10 dB lower than the theoretical prediction. It was also observed that scattering is increased at high transmitted amplitude (>1.5 MPa). The disruptible shell is believed to be a possible cause for both effects, and it is suggested that the shell is very important in understanding the acoustic response of the contrast agent.
Pulse compression and X wave generation by Cross-Phase-Modulation induced spatiotemporal reshaping (2007)

Filamentation dynamics in the normal group-velocity-dispersion regime (in condensed media) is interpretable in terms of the spontaneous formation of X waves that is, stationary (non-dispersive and non-diffractive) wave packets characterized by a central high-intensity spike surrounded by slowly decaying tails that continuously sustain the central peak through a refuelling mechanism. Here we investigate numerically and experimentally the role of Cross-Phase-Modulation (XPM) from an intense pump to a weaker seed signal in the presence of pump filamentation.
Integration host factor-mediated expression of the ilvGMEDA operon of Escherichia coli (1991)

The structural genes of the ilvGMEDA operon of Escherichia coli are preceded by two promoters, ilvPG1 and ilvPG2, and a leader-attenuator region. Alkylation protection and hydroxyl radical footprinting techniques have been used to demonstrate that integration host factor (IHF) interacts with the nucleotides in a consensus-like DNA sequence located immediately downstream of the RNA polymerase transcriptional pause site in the leader-attenuator region. In the presence of purified IHF protein, in vitro transcriptional pausing of RNA polymerase at the leader-attenuator pause site is increased 2-fold and, concomitantly, a 2-fold increase in transcriptional termination at the attenuator is observed. Strains containing chromosomal transcriptional fusions of various segments of the ilvGMEDA promoter-attenuator region to the galK gene were used to show that IHF also decreases the in vivo basal level of transcriptional readthrough at the attenuator 2-fold. The binding of IHF to another target site in the ilvPG1 promoter region represses transcription from this promoter and causes a 4-fold stimulation of transcription initiation from the downstream ilvPG2 promoter 4-fold. This IHF-mediated control of transcription initiation from the upstream promoter region is independent of the regulation of transcription termination effected by IHF interaction at the attenuator site. Thus, IHF is capable of regulating the expression of the ilvGMEDA operon in opposing manners; it can activate transcription initiation of this operon from the ilvPG2 promoter 4-fold and increase the termination of this transcription at the downstream attenuator 2-fold.
A NOTE ON THE SYSTEM WOLFRAM-TELLURIUM (1956)

not available
A self-adjusting code cache manager to balance start-up time and memory usage (2010)

In virtual machines for embedded devices that use just-in-time compilation, the management of the code cache can significantly impact performance in terms of both memory usage and start-up time. Although improving memory usage has been a common focus for system designers, start-up time is often overlooked. In systems with constrained resources, however, these two performance metrics are often at odds and must be considered together. In this paper, we present an adaptive self-adjusting code cache manager to improve performance with respect to both start-up time and memory usage. It balances these concerns by detecting changes in method compilation rates, resizing the cache after each pitching event. We conduct experiments to validate our proposed system and quantify the impacts that different code cache management techniques have on memory usage and start-up time through two oracle systems. Our results show that the proposed algorithm yields nearly the same start-up times as a hand-tuned oracle and shorter execution times than those of the SSCLI in eight out of ten applications. It also has lower memory usage over time in all but one application.
Nondestructive testing of laser targets (1974)

in laser-based ultrasound allows them to solve inspection problems with ultrasonics that could not be done before. This technology has wide application in many Lawrence Livermore National Laboratory programs, especially when remote and/or non-contact sensing is necessary.
Variation of Power with Height (1931)

THE influence of the surrounding atmospheric conditions on the power developed by an internal combustion engine has been the subject of a number of experimental investigations and theoretical discussions. The mass of experimental data dealt with and the rather involved arguments employed have, in some instances, tended to obscure the main issues of the problem.
An optimized model of skin effect for on-chip spiral inductors (2004)

An accurate equivalent network for modeling the skin effect is presented. Rules for choosing the number of parallel R-L branches for precisely modeling the skin effect in spiral inductors are presented. The concept has been verified using high-Q on-chip inductors realized using wafer level packaging techniques. A good agreement between measurements and simulations has been obtained up to the first resonance.
Polarisation-agile active patch antenna (1994)

A polarisation-agile active antenna has been constructed and tested. The radiation can be selected to be circularly polarised in either sense, or linearly polarised in the vertical, horizontal or either diagonal plane. The antenna consists of two varactor diode loaded active patches using npn bipolar transistors in the common base configuration as sources, and with the patch axes at right angles to each other. The two oscillators are locked to an external source, and the phase from each patch element is controlled by varying the diode bias voltage. By appropriate combination of the phase relationships, the various polarisations are produced.
User-centric pre-selection and scheduling for coordinated multipoint systems (2014)

The data traffic volumes are constantly increasing in cellular networks. Furthermore, a larger part of the traffic is generated by applications that require high data rates. Techniques including Coordinated Multipoint transmission (CoMP) can increase the data rates, but at the cost of a high overhead. The overhead can be reduced if only a subset of the users is served with CoMP. In this paper, we propose a user selection approach, including pre-selection of CoMP users and short term scheduling, that takes user requirements into account. Users that require a high data rate to reach an acceptable level of service satisfaction are selected to use coherent joint processing CoMP in some of their downlink transmission bandwidth. Simulation results show that both the number of satisfied users and fairness are improved with the proposed user selection as compared to user selection that does not consider individual user requirements.
Light and dark adaptation in Phycomyces light-growth response. (1983)

Sporangiophores of the fungus Phycomyces exhibit adaptation to light stimuli over a dynamic range of 10(10). This range applies to both phototropism and the closely related light-growth response; in the latter response, the elongation rate is modulated transiently by changes in the light intensity. We have performed light- and dark-adaptation experiments on growing sporangiophores using an automated tracking machine that allows a continuous measurement of growth velocity under controlled conditions. The results are examined in terms of the adaptation model of Delbrück and Reichardt (1956, Cellular Mechanisms in Differentiation and Growth, 3-44). The "level of adaptation," A, was inferred from responses to test pulses of light by means of a series of intensity-response curves. For dark adaptation to steps down in the normal intensity range (10(-6)-10(-2) W/m2), A decays exponentially with a time constant b = 6.1 +/- 0.3 min. This result is in agreement with the model. Higher-order kinetics are indicated, however, for dark adaptation in the high-intensity range (10(-2)-1 W/m2). Adaptation in this range is compared with predictions of a model relating changes in A to the inactivation and recovery of a receptor pigment. In response to steps up in intensity in the normal range, A was found to increase rapidly, overshoot the applied intensity level, and then relax to that level within 40 min. These results are incompatible with the Delbrück-Reichardt model or any simple generalizations of it. The asymmetry and overshoot are similar to adaptation phenomena observed in systems as diverse as bacterial chemotaxis and human vision. It appears likely that light and dark adaptation in Phycomyces are mediated by altogether different processes.