gebhart/patrepeval huggingface dataset:
Thermal behavior of poly(2-hydroxyethyl methacrylate-bis-[trimethoxysilylpropyl]amine) networks (2013)

Poly(HEMA-BisSi) networks were prepared by using acid-catalyzed sol-gel of bis- (trimethoxysilylpropyl)amine (BisSi) and free radical polymerization of 2-hydroxyethyl methacrylate (HEMA). The thermal properties of the poly(HEMA -BisSi) networks were investigated with differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The thermal behavior of these networks was also compared with homopolymers (The networks formed in both PHEMA and PBisSi gels were identified). The glass transition temperature (Tg) of PHEMA homopolymer was found as 103.74 °C. The thermal degradation of the poly(HEMA-BisSi) networks with different silica contents (e.g. 10, 15 and 25 wt%) were evaluated with use of DTG. It was observed that the thermal degradation temperature of poly(HEMA-BisSi) networks changed much with the BisSi content.
Superconducting thin-film gyroscope readout for Gravity Probe-B (1987)

We describe the high-resolution gyroscope (gyro) readout system for the Stanford Gravity Probe-B experiment, whose purpose is to measure two general relativistic precessions of gyroscopes in Earth orbit. In order to achieve the required resolution in angle (0.001 arc · s), the readout system combines high-precision mechanical fabrication and measurement techniques with superconducting thin-film technology, ultra-low magnetic fields, and Superconducting Quantum Interference Device (SQUID) detectors. We discuss system design, performance limits achievable with current technology, and the results of fabrication and laboratory testing to date.
Selective Hydrogenation of Methyl Oleate Ozonolysis Products by Palladium in Pyridine—Methanol Solvent<sup>1</sup> (1962)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelective Hydrogenation of Methyl Oleate Ozonolysis Products by Palladium in Pyridine—Methanol Solvent1E. H. Pryde, D. E. Anders, H. M. Teeter, and J. C. CowanCite this: J. Org. Chem. 1962, 27, 9, 3055–3059Publication Date (Print):September 1, 1962Publication History Published online1 May 2002Published inissue 1 September 1962https://pubs.acs.org/doi/10.1021/jo01056a015https://doi.org/10.1021/jo01056a015research-articleACS PublicationsRequest reuse permissionsArticle Views245Altmetric-Citations17LEARN 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
AN EXPERIMENTAL INVESTIGATION INTO NO2 ASSISTED PASSIVE OXIDATION WITH AND WITHOUT UREA DOSING AND ACTIVE REGENERATION OF PARTICULATE MATTER FOR A SCR CATALYST ON A DPF (2016)

In this study, the combination of a DPF and SCR catalyst technology together on a single substrate was investigated for both loading and oxidation performance. Johnson Matthey together with Corning have developed the latest in diesel aftertreatment technologies with the SCRF®. To test the steady state oxidation performance of the pre-production system, a series of fourteen NO2 assisted passive oxidation (PO) tests (seven with urea injection, and seven without) and four active regeneration tests were performed on a 2013 Cummins ISB engine. The aftertreatment production system was modified to allow for experimental investigation into passive oxidation with and without urea dosing and active regeneration of particulate matter for a SCR on a DPF. The primary focus of this study was to carry out passive oxidation (with and without urea dosing), active regeneration and to measure species concentrations, PM mass retained, flowrates, substrate temperature distributions, pressure drop across the filter, and to determine the PM oxidation performance of the SCRF® and compare it to the baseline system. The data from this study will be used in the development and calibration of the MTU SCR-F model. The passive oxidation performance of the SCRF® was experimentally studied by oxidizing the accumulated PM at five distinct engine and exhaust conditions. These conditions were intended to span a wide range of standard space velocities (10.3-38.2 k/hr), substrate temperatures (273-377°C), and NO2 concentrations (117-821 ppm). The tests were repeated, once with and once without the injection of urea in the form of diesel exhaust fluid. Urea dosing was performed at a target ammonia to NOX ratio of 1.0 to investigate both the NOX reduction performance, as well as the effect it has on the PM passive oxidation performance. Each test began with an accelerated loading stage designed to accumulate 1.7±0.4 g/L. The two loading stages and the two post oxidation stages were intended not only to accumulate particulate matter for the passive oxidation stage, but also to characterize the difference to the production system. The study found that the SCRF® was able to achieve 88-99% reduction in NOX with urea for the steady state PO conditions studied and there was 51% lower PM reaction rates, and 60% lower rate constants k, compared to without urea injection. The thermal oxidation performance was studied by investigating three different active regeneration tests points above 500°C where the contribution of NO2 assisted oxidation was less than 10% based on other
D-HPLC analysis of the entire FLT3 gene in MLL rearranged and hyperdiploid acute lymphoblastic leukemia (2007)

MLL rearranged and hyperdiploid acute lymphoblastic leukemia (ALL) are characterized by high-level FLT3 expression and constitutive FLT3 activation. As known activating FLT3 mutations are often absent in these patients, we screened the entire FLT3 coding sequence in MLL rearranged and hyperdiploid ALL cases for yet unidentified additional genetic alterations using denaturing D-HPLC. Both in MLL rearranged and hyperdiploid ALL we found that a small minority of samples, 7% and 10% respectively, carried genetic alterations. Although some of these alterations may induce FLT3 activation, the majority of these patients carry wild-type FLT3 genes.
High voltage, high current lateral devices (1980)

A magnetron injection gun operating with temperature limited electron emission has been designed for a gyrotron amplifier. A series of computer models of the gun anode region were used to determine selected thermal and structural characteristics. Their effects on electron beam energy, velocity spread, and temperature were evaluate. The Thermal analysis yielded the steady state temperatures of 137 node points. Thermally induced mechanical expansions were found to be 0.20% axially and 0.82% radially. In the three dimensional coordinate sytem utilized, the stress in 373 elements were numerically evaluated. The cathode heater power brought the cathode emitter up to 1068°C in 500 seconds. The cathode cooling due to electron emission was found to increase the steady state heater input power requirement by 11% (for an emitter temperature of 1068°C) from 9 W to 11 W. The electron trajectory analysis included an evaluation of the beam energy, velocity spread, and temperature. The effect of the deformed mechanical shapes on the beam paremeters was determined. A two dimentional computer simulation was used to graphically depict the electron trajectories in the gun anode region.
Notes: Pyrolysis of N-Phenylthiocarbamylethylenediamine and Related Materials (1959)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNotes: Pyrolysis of N-Phenylthiocarbamylethylenediamine and Related MaterialsLon Helgen, Oliver Stoutland, and Courtland AgreCite this: J. Org. Chem. 1959, 24, 6, 884–886Publication Date (Print):June 1, 1959Publication History Published online10 July 2003Published inissue 1 June 1959https://pubs.acs.org/doi/10.1021/jo01088a626https://doi.org/10.1021/jo01088a626research-articleACS PublicationsRequest reuse permissionsArticle Views132Altmetric-Citations10LEARN 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
Enhanced interface stress analysis of piezoelectric smart beams (2008)

Piezoelectric patches are usually externally bonded to host structures as sensors or actuators. The performance and integrity of this type of smart structure are determined by the interface stresses within the adhesive layer. To accurately evaluate these interface stresses, a novel analytical model is developed in this study. This new model treats the adhesive layer as two normal spring layers interconnected by a shear spring layer. The peel stresses along the top and bottom surfaces of the adhesive layer are assumed to be different. An interface deformable beam theory is used to describe the deformation of the piezoelectric patch and the host beam. Unlike existing elementary beam theories, this new beam theory captures the deformation of adherends induced by interface stresses by using two interface compliances. Closed-form solutions of interface stresses with enhanced accuracy have been successfully obtained by the new model. The new solutions not only satisfy both the equilibrium condition of the adhesive layer and zero-shear stress boundary condition at the free edge, but also correctly give two different peel stress distributions along the interface between the piezoelectric patch and adhesive layer and the interface between the adhesive layer and the host beam. A numerical example of the sensing charge output suggests that the present model is applicable to the cases of a thick adhesive layer or thick host beams, while the existing model is not.
Acute Hemodynamic Effects of Intravenous Amiodarone in Patients with Coronary Artery Disease (1985)

The acute hemodynamic effects of intravenous amiodarone (Cordarone injectable; Labaz) were studied during cardiac catheterization in 16 male patients with coronary artery disease (age range, 38-64 years; mean, 53 years). Amiodarone was administered as a bolus at a dosage of 5 mg/kg bodyweight over a 1-min period. Measurements were made 5, 10, and 15 min thereafter. The drug had little effect on heart rate, aortic pressure, cardiac index, and vascular resistances. There were small and nonsignificant increases in left ventricular end-diastolic pressure and end-diastolic volume. The ejection fraction decreased slightly and not significantly. In addition to some increases in pulmonary wedge, pulmonary artery, and right atrial pressures, the significant findings were a 15% decrease in maximal dP/dt and a 12% decrease in left ventricular work. These changes point to a slight negative inotropic effect of amiodarone.
Signal-to-Noise Ratio Estimation Algorithm for Advanced DVB-RCS Systems (2012)

This paper presents a signal-to-noise ratio (SNR) estimation algorithm for advanced Digital Video Broadcasting-Return Channel via Satellite (DVB-RCS) systems using adaptive coding and modulation (ACM) in the reverse link of broadband satellite systems. Due to the absence of a repetitive pilot symbol structure, SNR estimation has to be performed using the fixed symbol preamble data. Moreover, sporadic nature of data traffic on the return link causes variation in interference level from slot to slot and, therefore, the estimation has to be done within one traffic slot duration. Hence, it becomes necessary to use a combination of data-aided (DA) and decision-directed (DD) algorithms so as to make use of traffic data. A non-data-aided (NDA) estimator that was previously proposed by the authors for binary phase shift keying (BPSK) and QPSK schemes is extended to 8-PSK in a decision directed manner. This estimator shows improved performance over existing estimators. The inherent bias of DD approach at low values of SNR is reduced by using a hybrid approach, i.e., using the proposed estimator at moderate/high values of SNR and the moments-based estimator ( <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">M</i> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">M</i> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> ) at low values of SNR. Overall improved performance of the proposed hybrid estimator, in terms of accuracy and complexity, makes it an attractive choice for implementing ACM in advanced DVB-RCS systems.
Isoproterenol activates a chloride current, not the transient outward current, in rabbit ventricular myocytes (1989)

The effects of beta-adrenergic stimulation on the Ca2(+)-insensitive transient outward current (Ito) in rabbit ventricular myocytes were examined. Exposure to isoproterenol (ISO; 1 microM) activated a time-dependent current at positive membrane potentials. To determine whether this ISO-induced current was associated with Ito, sensitivity to the K+ channel antagonist, 3,4-diaminopyridine (DAP; 200 microM) was compared before and after exposure to ISO. The DAP-sensitive current was not enhanced by ISO, suggesting that the ISO-induced current was not a component of Ito. Ito and the ISO-induced current could also be dissociated by changing the membrane holding potential. Positive holding potentials, which produced significant inactivation of Ito, had little effect on the ISO-induced membrane current. Furthermore, the ISO-induced current could be observed when K+ was replaced by Cs+. The reversal potential of the ISO-induced current agreed with the predicted Cl- equilibrium potential, and exposure to Cl(-)-free extracellular solutions eliminated the response to ISO. Therefore, we conclude that ISO does not directly activate Ito in rabbit ventricular myocytes, but instead, activates a time-independent chloride current (ICl) similar to that recently described in guinea pig ventricular myocytes and shown to be regulated by adenylate cyclase (R. D. Harvey and J. R. Hume. Science Wash. DC 244: 983-985, 1989).
Allometric change of landforms (1975)

Research Article| November 01, 1975 Allometric change of landforms WILLIAM B. BULL WILLIAM B. BULL 1Geosciences Department, University of Arizona, Tucson, Arizona 85721 Search for other works by this author on: GSW Google Scholar Author and Article Information WILLIAM B. BULL 1Geosciences Department, University of Arizona, Tucson, Arizona 85721 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1975) 86 (11): 1489–1498. https://doi.org/10.1130/0016-7606(1975)86<1489:ACOL>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation WILLIAM B. BULL; Allometric change of landforms. GSA Bulletin 1975;; 86 (11): 1489–1498. doi: https://doi.org/10.1130/0016-7606(1975)86<1489:ACOL>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Allometry is the study of the relative rates of change of two variables of a system. In the study of landforms, or the processes acting upon them, the power function Y = aXb is useful for correlating changes in variables. Allometric analysis includes the study of dynamic interrelations during geomorphic history, or the static interrelations at a given time. Such analyses may include aspects of geomorphic open systems that are tending toward a steady state, have attained a steady state, or do not tend toward a steady state. The highly flexible allometric model can be used to demonstrate adjustment between interdependent variables of hillslopes, streams, and depositional environments.It is highly unlikely that geomorphic steady states exist, because the dependent variables of a geomorphic open system cannot attain a time-independent state where the independent variables do not remain constant. Independent variables, such as climate, uplift, base level, erodibility of surficial materials, and impact of man, are changing at rates that are sufficiently rapid as to preclude attainment of steady state, particularly for those landforms that require geologic time spans to approach steady-state configurations. For most studies of processes and landforms, a broad perspective of the interrelations of materials, processes, and landforms can be obtained by using the model of allometric change in which landscape elements and processes are changing at different rates. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Longitudinal study of combined orthodontic and surgical treatment of Class II malocclusion with deep overbite. (1991)

Twenty-one patients who had undergone orthodontic treatment in combination with mandibular advancement surgery to treat Class II malocclusion and deep overbite were followed up. Median vertical relapse at the bony chin (after a mean followup of 16 months) was found to be 2.9 mm (44%). Sagittal advancement was found to have good stability; most of the patients exhibited some additional anterior movement of the chin during the follow-up period. At the same time, the entire mandible rotated counterclockwise and the gonial angle increased. Individual response to treatment varied greatly; two patients exhibited major horizontal relapse. Controlling the position of the mandibular proximal segment seemed to be the most important factor in posttreatment stability of this sample.
Compilation Optimization Pass Selection Using Gate Graph Attention Neural Network for Reliability Improvement (2020)

When dealing with different programs or applications, it is necessary to select the appropriate compilation optimization pass or subsequence for the program. Machine learning is widely used as an efficient technological means of solving this problem. However, the most important problem when using machine learning is the extraction of program features. Obtaining more semantic and syntax information and complex transitions among code segments from the source code are obviously necessary in this context, and is also an area that may have been neglected by previous work. Ensuring the integrity and effectiveness of program information is key to this problem. Moreover, when performing and improving the selection, the measurement indicators are often program performance, code size, etc.; there is limited research on program reliability in this context, which requires both the longest measurement time and the most complicated measurement methods. Accordingly, this paper establishes a combined program feature extraction model and proposes a graph-based compilation optimization pass selection model that learns heuristics for program reliability. This experiment was performed using the clang compilation framework. The alternative compilation optimization pass adopts the C language standard compilation optimization passes. Compared with traditional machine learning methods, our model improves the average accuracy by between 5% and 11% in the optimization pass selection for program reliability. Our experiments also demonstrate the strong scalability of our proposed model.
Prostaglandin endoperoxide synthetase from bovine vesicular gland microsomes. Inactivation and activation by heme and other metalloporphyrins. (1978)

Prostaglandin endoperoxide synthetase purified to apparent homogeneity from bovine vesicular gland microsomes contained iron far below the equimolar amount and essentially no heme. However, the enzyme required various metalloporphyrins including hematin or several hemoproteins such as hemoglobin. Preincubation of the enzyme with hematin or hemoglobin resulted in the loss of enzyme activity. The enzyme inactivation was protected by tryptophan or various other aromatic compounds. Furthermore, the simultaneous presence of tryptophan brought about activation of enzyme; namely, the enzyme preincubated with heme and tryptophan showed an almost full activity with a heme concentration in the reaction mixture far below the saturating level. Such inactivation and activation of the enzyme were also observed with manganese protoporphyrin. An identical heme requirement, heme-induced inactivation, and activation of the enzyme were observed in three types of reactions catalyzed by the enzyme: 1) bis-dioxygenation of 8,11,14-eicosatrienoic acid to produce prostaglandin G1, 2) 15-hydroperoxide cleavage of prostaglandin G1 to produce prostaglandin H1, and 3) guaiacol peroxidation. When heme was replaced by manganese protoporphyrin, the enzyme catalyzed only the bis-dioxygenation producing prostaglandin G1 and the activities of the latter two reactions were not detectable.