gebhart/patrepeval huggingface dataset:
Synthesis and characterization of new cardo polyamide-imides containing ether and tricyclo[5.2.1.02, 6]decane groups (1999)

A new cardo diimide-dicarboxylic acid, 8,8-bis[4-(4-trimellitimidophenoxy)phenyl]tricyclo-[5.2.1.02, 6]decane (BTPTD), containing an ether linkage and a tricyclo[5.2.1.02, 6]decane group was synthesized by condensation reaction of 8,8-bis[4-(4-aminophenoxy)phenyl]tricyclo[5.2.1.02, 6]decane with trimellitic anhydride. A series of new cardo polyamide-imides were prepared by direct polycondensation of BTPTD with various aromatic diamines in N-methyl-2-pyrrolidinone (NMP) using triphenyl phosphite and pyridine as condensing agents. The polymers were produced with high yield and moderate to high inherent viscosities, i. e., of 0.73–1.36 dL·g–1. Nearly all polymers are readily soluble in polar aprotic solvents such as NMP, N,N-dimethylacetamide (DMAc), N,N-dimethylformamide, dimethyl sulfoxide as well as less polar solvents such as pyridine, γ-butyrolactone, and tetrahydrofuran. These polymers were solution-cast from DMAc solution into transparent, flexible, and tough films except for polymers 4 a and 4 b. Wide-angle X-ray measurement revealed that all polymers were amorphous. These polyamide-imides have glass transition temperatures between 250–290°C and 5% weight loss temperatures in the range of 445 to 491 and 462 to 490°C in nitrogen and air atmosphere, respectively. The polymer films have a tensile strength range of 77 to 87 MPa, an elongation at break range of 3 to 9%, and a tensile modulus range of 2.2 to 2.8 GPa.
Enhanced Circular Dichroism and Chiral Sensing with Bound States in the Continuum (2019)

We reveal that optical chirality at the nanoscale can be boosted dramatically by bound states in the continuum (BIC). We predict the enhancement of chiroptical signals from nanostructures supporting quasi-BICs in mid-IR with a record-high efficiency. © 2019 The Author(s)
Sirolimus-eluting stents versus bare-metal stents in routine clinical use: a nonrandomized comparison. (2011)

Conflicting patient outcomes have been reported after the use of sirolimus-eluting stents or bare-metal stents. In this nonrandomized study, we examine the outcomes after placement of sirolimus-eluting versus bare-metal stents in an unselected population of patients who underwent percutaneous coronary revascularization.We used THIRD-base, a longitudinal data registry of patients who underwent revascularization at our institution, to compare demographics and outcomes in patients treated with a sirolimus-eluting or bare-metal stent from January 2001 through June 2006. Outcome measures included major acute coronary and cerebral events at 30 days, target-vessel failure at 9 months and at 3 years, and stent thrombosis. Target-vessel failure was defined as the composite of all-cause death, recurrent myocardial infarction in the treated vessel distribution, and target-vessel revascularization. Logistic regression and Cox proportional regression models were used to determine the predictors of outcome.Of the 6,425 patients analyzed, 2,581 patients (40.2%) received only sirolimus-eluting stents, and 3,844 patients (59.8%) received only bare-metal stents. Early major acute coronary and cerebral events and stent thrombosis at 30 days and 9 months were similar in both groups. Target-vessel failure was less frequent in sirolimus-eluting stent patients than in bare-metal stent patients at 9 months (4.84% vs 11.81%, P < 0.0001) and at 3 years (29% vs 32%, P < 0.0001).Use of sirolimus-eluting stents improved target-vessel failure survival at 9 months and at 3 years. Late adverse events were determined by known risk factors for atherosclerosis, not by stent type.
Adaptive Capacity to Extreme Heat: Results from a Household Survey in Houston, Texas (2017)

Abstract Extreme heat is the leading cause of weather-related mortality in the United States, suggesting the necessity for better understanding population vulnerability to extreme heat. The work presented here is part of a larger study examining vulnerability to extreme heat in current and future climates [System for Integrated Modeling of Metropolitan Extreme Heat Risk (SIMMER)] and was undertaken to assess Houston, Texas, residents’ adaptive capacity to extreme heat. A comprehensive, semistructured survey was conducted by telephone at 901 households in Houston in 2011. Frequency and logistic regression analyses were conducted. Results show that 20% of the survey respondents reported heat-related symptoms in the summer of 2011 despite widespread air conditioning availability throughout Houston. Of those reporting heat-related symptoms experienced in the home (n = 56), the majority could not afford to use air conditioning because of the high cost of electricity. This research highlights the efficacy of community-based surveys to better understand adaptive capacity at the household level; this survey contextualizes population vulnerability and identifies more targeted intervention strategies and adaptation actions.
Irradiation of pediatric glioblastoma cells promotes radioresistance and enhances glioma malignancyviagenome-wide transcriptome changes (2018)

Pediatric glioblastoma (GBM) is a relatively rare brain tumor in children that has a dismal prognosis. Surgery followed by radiotherapy is the main treatment protocol used for older patients. The benefit of adjuvant chemotherapy is still limited due to a poor understanding of the underlying molecular and genetic changes that occur with irradiation of the tumor. In this study, we performed total RNA sequencing on an established stable radioresistant pediatric GBM cell line to identify mRNA expression changes following radiation. The expression of many genes was altered in the radioresistant pediatric GBM model. These genes have never before been reported to be associated with the development of radioresistant GBM. In addition to exhibiting an accelerated growth rate, radioresistant GBM cells also have overexpression of the DNA synthesis-rate-limiting enzyme ribonucleotide reductase, and pro-cathepsin B. These newly identified genes should be concertedly studied to better understand their role in pediatric GBM recurrence and progression after radiation. It was observed that the changes in multiple biological pathways protected GBM cells against radiation and transformed them to a more malignant form. These changes emphasize the importance of developing a treatment regimen that consists of a multiple-agent cocktail that acts on multiple implicated pathways to effectively target irradiated pediatric GBM. An alternative to radiation or a novel therapy that targets differentially expressed genes, such as metalloproteases, growth factors, and oncogenes and aim to minimize oncogenic changes following radiation is necessary to improve recurrent GBM survival.
Prestack depth migration for complex 2D structure using phase‐screen propagators (1997)

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1997Prestack depth migration for complex 2D structure using phase‐screen propagatorsAuthors: Peter RobertsLian‐Jie HuangCharles BurchMichael FehlerSteven HildebrandPeter RobertsLos Alamos National Laboratory, Lian‐Jie HuangLos Alamos National Laboratory, Charles BurchConoco Inc., Michael FehlerLos Alamos National Laboratory, and Steven HildebrandLos Alamos National Laboratoryhttps://doi.org/10.1190/1.1885635 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink: https://doi.org/10.1190/1.1885635FiguresReferencesRelatedDetailsCited bySeismic depth imaging with the Gabor transformYongwang Ma and Gary F. Margrave2 May 2008 | GEOPHYSICS, Vol. 73, No. 3Adaptive Gabor imaging using the lateral position error criterionYongwang Ma and Gary F. Margrave14 September 2007Seismic depth imaging with the Gabor transformYongwang Ma and Gary F. Margrave6 October 2006Quasi-Born Fourier migrationGeophysical Journal International, Vol. 140, No. 3Extended local Born Fourier migration methodLian‐Jie Huang, Michael C. Fehler, and Ru‐Shan Wu7 February 2012 | GEOPHYSICS, Vol. 64, No. 5Extended local Rytov Fourier migration methodLian‐Jie Huang, Michael C. Fehler, Peter M. Roberts, and Charles C. Burch7 February 2012 | GEOPHYSICS, Vol. 64, No. 5 SEG Technical Program Expanded Abstracts 1997ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 1997 Pages: 2067 publication data© 1997 Copyright © 1997 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 10 Feb 2005 CITATION INFORMATION Peter Roberts, Lian‐Jie Huang, Charles Burch, Michael Fehler, and Steven Hildebrand, (1997), "Prestack depth migration for complex 2D structure using phase‐screen propagators," SEG Technical Program Expanded Abstracts : 1282-1285. https://doi.org/10.1190/1.1885635 Plain-Language Summary PDF DownloadLoading ...
Synthesis and characterization of aromatic copolyesters containing siloxane linkages in the polymer backbone (2006)

Abstract A new series of aromatic copolyesters containing siloxane linkages were prepared by the melt polymerization of bisphenol A (BPA) with eugenol end‐capped siloxane (EuSi), diphenyl terephthalate (DPT), and diphenyl isophthalate (DPI) in varying ratio in the temperature range 220–290°C under reduced pressure in the presence of dibutyl tin dilaurate (DBTL) catalyst. The siloxane copolyesters prepared were characterized by FTIR, 1 H‐NMR spectroscopy, solution viscosity, thermogravimetric analysis, differential scanning calorimetry, and X‐ray diffraction. The effect of incorporation of eugenol end‐capped siloxane was studied on the properties of BPA/DPI/DPT copolyesters. The glass‐transition temperature of copolyester was decreased from 184 to 70°C by incorporation of 20% of eugenol end‐capped siloxane. All copolyesters were found to be soluble in commonly used aprotic polar solvents and had film‐forming properties. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3222–3228, 2006
Ultra-High-Speed Image Signal Accumulation Sensor (2010)

Averaging of accumulated data is a standard technique applied to processing data with low signal-to-noise ratios (SNR), such as image signals captured in ultra-high-speed imaging. The authors propose an architecture layout of an ultra-high-speed image sensor capable of on-chip signal accumulation. The very high frame rate is enabled by employing an image sensor structure with a multi-folded CCD in each pixel, which serves as an in situ image signal storage. The signal accumulation function is achieved by direct connection of the first and the last storage elements of the in situ storage CCD. It has been thought that the multi-folding is achievable only by driving electrodes with complicated and impractical layouts. Simple configurations of the driving electrodes to overcome the difficulty are presented for two-phase and four-phase transfer CCD systems. The in situ storage image sensor with the signal accumulation function is named Image Signal Accumulation Sensor (ISAS).
Effect of Ni content on microstructure and mechanical properties of NbC-WC-Ti (C0. 7, N0. 3)-Ni cermets (2019)

As a refractory carbide, NbC has a low density (7.79 g/cm3), a good chemical stability, high melting point of 3600°C and room temperature hardness of 19.6 GPa. In this study, Ni bonded NbC cermets, i.e. NbC-x Ni-18 WC-14 Ti(C0.7N0.3) (wt%) with a Ni content varying from 6 to 20 wt% were prepared by conventional pressureless liquid phase sintering in vacuum for 90 min at 1390 or 1450°C. Detailed microstructural investigation was performed by SEM and XRD analysis. The composition and content of the constituent phases in the cermet were simulated by thermodynamic modelling. All cermets were fully densified under the applied sintering conditions. Microstructure and phase analysis indicated that the NbC based cermets were composed of a core-rim structured cubic (Nb,W,Ti)(C,N) phase and a cubic Ni alloy binder. The variation in Ni content resulted in a significant effect on the hardness and toughness of the cermets. The hardness is decreased whereas the fracture toughness is increased nearly linearly with increasing Ni content. The NbC-9 Ni-18 WC-14 Ti(C0.7N0.3) (wt%) cermets, sintered at 1450°C, exhibited a good combination of hardness 1500 kg/mm2 and indentation toughness of ~ 8.8 MPa.m1/2, as well as a three point flexural strength of 2000 MPa.
MILK COAGULATION CUT‐TIME DETERMINATION USING ULTRASONICS (1996)

A nondestructive method of determining milk coagulation cut‐time was investigated. Velocity and attenuation of ultrasonic waves through coagulating skim milk were measured after rennet addition. the ultrasonic attenuation measurements were found suitable for distinguishing the effect of different experimental variables (three levels of temperature, rennet and CaCl 2 ). Based on the rate of change of attenuation during coagulation, a turning point was defined at which the attenuation rate change was ‐0.1 neper/m/min. the cut‐time was proposed to be 20 min from the time the turning point was observed. the cut‐times predicted by this criterion were statistically similar to those predicted by the manual method currently used in the industry.
Constellation Expansion for Differentially Encoded 100G Transmission (2014)

Recent technological progress has enabled the implementation of powerful soft-decision forward error correction codes performing very close to the theoretical Shannon limit. However, recently we showed that, even when the most powerful binary codes are used, a significant potential gain remains unexploited in traditional, coherently detected, non differentially encoded, polarization division multiplexed 100G optical communication systems, when the modulation format is restricted to quadrature phase-shift keying. In this letter, we extend our previous work to the case of differentially encoded systems. Assuming again additive and phase white Gaussian noise, we show that an additional gain of 1-4.5 dB (depending on the amount of phase noise present) is available even when differential transmission is employed, if higher order constellations are used in place of quadrature phase-shift keying. Special care and suitable optimization criteria are required in the choice of the alternative signal constellations since, in contrast with the NDE case, the Euclidean distance is not a significant figure of merit anymore.
Chemotaxis to the Quorum-Sensing Signal AI-2 Requires the Tsr Chemoreceptor and the Periplasmic LsrB AI-2-Binding Protein (2010)

AI-2 is an autoinducer made by many bacteria. LsrB binds AI-2 in the periplasm, and Tsr is the l-serine chemoreceptor. We show that AI-2 strongly attracts Escherichia coli. Both LsrB and Tsr are necessary for sensing AI-2, but AI-2 uptake is not, suggesting that LsrB and Tsr interact directly in the periplasm.
Cues above 4 kilohertz can improve spatially separated speech recognition. (2011)

There are multiple acoustic cues above 4 kHz that may be used to improve speech recognition in noisy environments. This study tests this hypothesis with spatially separated speech maskers. The reception threshold of speech (RTS) was measured in two conditions: (1) asymmetric condition with target speech at −45° and maskers at +45°, and (2) diffuse condition with speech at 0° and one masker at each of four quadrants around the listener (±45°, ±135°). HINT sentences were rerecorded using a male talker and a 22.05 kHz bandwidth while different males were recorded speaking the television and rainbow as maskers. SRTs were measured with all materials low-pass filtered at 4, 6, 8, and 10 kHz for the asymmetric and diffuse conditions. 12 normal hearing subjects (on the way to 24) were tested using free-field loudspeakers in a sound booth. The mean RTSs for the asymmetric condition were −17.43, −19.07, −19.34, and −20.65 dB for 4, 6, 8, and 10 kHz, respectively. For the diffuse condition the mean RTSs were −7.77, −9.00, −9.88, and −10.05 dB for the same frequencies. The results suggest that high-frequency acoustic cues can enhance the ability to segregate spatially separated speech.
Studies Of Microwave-driven Sodium Fluorescence: Atomic And Excimer Emissions (1994)

The microwave-driven spectra of sodium vapor are demonstrated for sodium vapor pressure up to 28 Torr (T = 880 K). The atomic emission, especially D line emission, was dominant in microwave excitation. As increasing the vapor pressure, the D line spectrum was broadened and the intensity was decreased. The self-absorption of D line was observed at the vapor pressure greater than 4 Torr (T = 773 K). The first microwave excited sodium excimer emission is reported. The sodium excimer emission between 420 and 460 nm can be recognized as the triplet (2{sup 3}{Pi}g {r_arrow} 1{sup 3}{Epsilon}{sub u}{sup +} centered at 436 nm) and singlet (2{sup 1}{Epsilon}{sub u}{sup +} {r_arrow} X{sup 1}{Epsilon}{sub g}{sup +} at 452 nm) transitions, which appeared at the vapor pressure greater than 0.01 Torr (T = 573 K). The intensity ratio of the excimer emission to the D line was varied roughly from 0.001 (T {approx_equal} 573 K) to 0.01 (T {approx_equal} 773 K). The efficiency of the microwave sodium fluorescence is also estimated by an absolutely calibrated optical multichannel analyzer. The intrinsic efficiency of sodium D line is up to 43% at T = 485 K with 100 Torr argon. The relation of the experimental parametersmore » with the emission intensity is analyzed and discussed for optimal operation of atomic or excimer emissions respectively.« less
Prevalence of antibody to the Norwalk virus in various countries (1979)

Serum samples from children and adults from several countries were tested by radioimmunoassay for antibody to the Norwalk virus. Antibody was commonly found in adults from all the countries tested. Antibody appears to be acquired more rapidly in children from underdeveloped countries than in children from the United States.
HARMONIC FREQUENCY COMB COVERING THE MID-INFRARED MOLECULAR FINGERPRINT REGION (2018)

Polycyclic aromatic hydrocarbons (PAHs) are believed to act as catalysts in ice grains formation. The formation of interstellar ice can thus be described as an aggregation process of gaseous water starting on PAH surfaces. \n\n\n\nThe structural investigation of PAH-H$_{2}$O clusters, therefore, represents a first and important step to undertake in order to shed light on potential ice grains formation pathways. Previous studies have focused on mimicking the initial stage of this aggregation process in laboratories by forming complexes between PAH and water molecules in the gas phase and investigating them by microwave spectroscopy. As the outcome of these studies, precise information on the structure and intermolecular interactions were obtained [1,2]. \n\n\n\nHerein we take this approach further and present preliminary data on the structural investigation of the complex of phenanthrene, a PAH molecule featuring three fused benzene rings, and water. Its pure rotational spectrum was recorded using a chirped pulse Fourier transform microwave spectrometer (CP-FTMW) operating in the region 2-8 GHz, and structural information on the respective water clusters can be obtained.\\\\ \n\n\n\n[1] Pérez, C.; Steber, A. L.; Rijs, A. M.; Temelso, B.; Shields, G. C.; Lopez, J. C.; Kisiel, Z.; Schnell, M., Phys. Chem. Chem. Phys. 2017, 19, 14214-14223.\n\n[2] Steber, A. L.; Pérez, C.; Temelso, B.; Shields, G. C.; Rijs, A. M.; Pate, B. H.; Kisiel, Z.; Schnell, J. Phys. Chem. Lett. 2017, 8, 5744-5750.
CMOS compatible SOI nanowire FET with charged dielectric for temperature sensing applications (2019)

Abstract This paper reports a novel concept of a low voltage low power temperature sensor with a 300–370 K operating temperature range, based on a silicon-on-insulator (SOI) nanowire FET with standard SOI CMOS technology. The novel design combines a top-down silicon nanowire and an electrostatically formed nanowire, capacitively coupled to a back-gate electrode. A surface charged silicon nitride layer is used to deplete the upper part of the nanowire, while a back-gate controls the size and location of the electrostatically formed nanowire. The device operates in a regime similar to the subthreshold regime of a nanowire transistor and features a very high temperature response, expressed by the temperature coefficient of current (TCC = 6 % K −1 at 0.4 &lt; I DS &lt; 5 pA for a single nanowire). The device can be easily integrated into a nanowire-based sensor array.
ChemInform Abstract: Asymmetric Synthesis of α‐Chloro‐β‐amino‐N‐sulfinyl Imidates as Chiral Building Blocks. (2011)

Abstract Coupling of imidate (I) with aldimines or α‐amido sulfones allows highly diastereoselective access (&lt; 92% ds) to optically active α‐chloro‐β‐amino‐N‐sulfinyl imidates.
Spatially coherent clustering using graph cuts (2004)

Feature space clustering is a popular approach to image segmentation, in which a feature vector of local properties (such as intensity, texture or motion) is computed at each pixel. The feature space is then clustered, and each pixel is labeled with the cluster that contains its feature vector. A major limitation of this approach is that feature space clusters generally lack spatial coherence (i.e., they do not correspond to a compact grouping of pixels). In this paper, we propose a segmentation algorithm that operates simultaneously in feature space and in image space. We define an energy function over both a set of clusters and a labeling of pixels with clusters. In our framework, a pixel is labeled with a single cluster (rather than, for example, a distribution over clusters). Our energy function penalizes clusters that are a poor fit to the data in feature space, and also penalizes clusters whose pixels lack spatial coherence. The energy function can be efficiently minimized using graph cuts. Our algorithm can incorporate both parametric and non-parametric clustering methods. It can be applied to many optimization-based clustering methods, including k-means and k-medians, and can handle models, which are very close in feature space. Preliminary results are presented on segmenting real and synthetic images, using both parametric and non-parametric clustering.
Use of Hepatitis B Virus DNA Quantitation To Predict Hepatitis B e Antigen Reversion in Cases of Chronic Hepatitis B (2003)

Seventy-three chronic hepatitis B patients who had either hepatitis B e antigen (HBeAg) seroconversion (group I) or HBeAg-negative disease (group II) were studied. HBV DNA levels at HBeAg seroconversion (group I) and at initial visits (group II) were significantly lower among patients who were persistently negative for HBeAg than among those who underwent HBeAg reversion.
Development of the automatic recipe generation system for CD-SEM using design data (2006)

This study examines the "Multifactor Layout Analysis Method: MLA Method" newly developed for automatically detecting an appropriate addressing point and an auto focus point in the automatic generation of a measurement recipe for CD-SEM using design data. The MLA method is a unique pattern shape evaluation method capable of searching for the optimum addressing and auto focus points with a higher speed and accuracy than by the conventional methods, depending on the detailed information about the shape of a semiconductor pattern, which is contained in the design data. A recipe using the result of search by the MLA method has the same performance as that of a recipe generated by an experienced operator. This paper outlines the MLA method and reports on the result of experiments by this method and its practical applicability.
Broad band dipolar recoupling in the nuclear magnetic resonance of rotating solids (1993)

The effects of homonuclear dipole couplings may be reintroduced into magic angle spinning nuclear magnetic resonance (NMR) spectra by judiciously spaced π pulse trains. This recoupling phenomenon occurs over a wide range of chemical shift differences and sample rotation speeds. We present results of magnetization exchange experiments exploiting the broad band recoupling effect, and propose a theoretical description in which pulse-assisted dipolar recoupling may be understood as a form of compensated rotational resonance.