gebhart/patrepeval huggingface dataset:
Séparation actinides(III)-lanthanides(III) par nanofiltration assistée par complexation (2006)

Ces travaux de these ont pour objectif la separation actinides (III) / lanthanides (III) par un procede de nanofiltration assistee par complexation. Ainsi, un pilote de filtration membranaire tangentielle a ete concu et implante dans une boite a gants d'un laboratoire de l'installation ATALANTE du CEA-Marcoule. Une caracterisation physico-chimique de la membrane Desal GH (OSMONICS), retenue pour realiser la separation An(III)/Ln(III), a ete effectuee pour determiner notamment le potentiel zeta de la couche active et sa tenue aux rayonnements ionisants. En outre, une etude parametrique a egalement ete realisee pour optimiser la selectivite de complexation, et les conditions operatoires de retention des complexes. Enfin, la separation de traces d'Am(III) contenues dans un melange de Ln(III), simulant la charge reelle issue d'un cycle de retraitement, a ete evaluee avec plusieurs complexants de type acide polyaminocarboxylique en fonction de pH de la solution et de la quantite de ligand
Automated Detection of Intracranial Large Vessel Occlusions on Computed Tomography Angiography (2019)

Background and Purpose- Endovascular thrombectomy is highly effective in acute ischemic stroke patients with an anterior circulation large vessel occlusion (LVO), decreasing morbidity and mortality. Accurate and prompt identification of LVOs is imperative because these patients have large volumes of tissue that are at risk of infarction without timely reperfusion, and the treatment window is limited to 24 hours. We assessed the accuracy and speed of a commercially available fully automated LVO-detection tool in a cohort of patients presenting to a regional hospital with suspected stroke. Methods- Consecutive patients who underwent multimodal computed tomography with thin-slice computed tomography angiography between January 1, 2017 and December 31, 2018 for suspected acute ischemic stroke within 24 hours of onset were retrospectively identified. The multimodal computed tomographies were assessed by 2 neuroradiologists in consensus for the presence of an intracranial anterior circulation LVO or M2-segment middle cerebral artery occlusion (the reference standard). The patients' computed tomography angiographies were then processed using an automated LVO-detection algorithm (RAPID CTA). Receiver-operating characteristic analysis was used to determine sensitivity, specificity, and negative predictive value of the algorithm for detection of (1) an LVO and (2) either an LVO or M2-segment middle cerebral artery occlusion. Results- CTAs from 477 patients were analyzed (271 men and 206 women; median age, 71; IQR, 60-80). Median processing time was 158 seconds (IQR, 150-167 seconds). Seventy-eight patients had an anterior circulation LVO, and 28 had an isolated M2-segment middle cerebral artery occlusion. The sensitivity, negative predictive value, and specificity were 0.94, 0.98, and 0.76, respectively for detection of an intracranial LVO and 0.92, 0.97, and 0.81, respectively for detection of either an intracranial LVO or M2-segment middle cerebral artery occlusion. Conclusions- The fully automated algorithm had very high sensitivity and negative predictive value for LVO detection with fast processing times, suggesting that it can be used in the emergent setting as a screening tool to alert radiologists and expedite formal diagnosis.
Binding Affinities among DNA Helicase-Primase, DNA Polymerase, and Replication Intermediates in the Replisome of Bacteriophage T7 (2015)

The formation of a replication loop on the lagging strand facilitates coordinated synthesis of the leading- and lagging-DNA strands and provides a mechanism for recycling of the lagging-strand DNA polymerase. As an Okazaki fragment is completed, the loop is released, and a new loop is formed as the synthesis of a new Okazaki fragment is initiated. Loop release requires the dissociation of the complex formed by the interactions among helicase, DNA polymerase, and DNA. The completion of the Okazaki fragment may result in either a nick or a single-stranded DNA region. In the replication system of bacteriophage T7, the dissociation of the polymerase from either DNA region is faster than that observed for the dissociation of the helicase from DNA polymerase, implying that the replication loop is released more likely through the dissociation of the lagging-strand DNA from polymerase, retaining the polymerase at replication fork. Both dissociation of DNA polymerase from DNA and that of helicase from a DNA polymerase · DNA complex are much faster at a nick DNA region than the release from a ssDNA region. These results suggest that the replication loop is released as a result of the nick formed when the lagging-strand DNA polymerase encounters the previously synthesized Okazaki fragment, releasing lagging-strand DNA and retaining DNA polymerase at the replication fork for the synthesis of next Okazaki fragment.
Bovine endometrial stromal cells display osteogenic properties (2008)

The endometrium is central to mammalian fertility. The endometrial stromal cells are very dynamic, growing and differentiating throughout the estrous cycle and pregnancy. In humans, stromal cells appear to have progenitor or stem cell capabilities and the cells can even differentiate into bone. It is not clear whether bovine endometrial stromal cells exhibit a similar phenotypic plasticity. So, the present study tested the hypothesis that bovine endometrial stromal cells could be differentiated along an osteogenic lineage. Pure populations of bovine stromal cells were isolated from the endometrium. The endometrial stromal cell phenotype was confirmed by morphology, prostaglandin secretion, and susceptibility to viral infection. However, cultivation of the cells in standard endometrial cell culture medium lead to a mesenchymal phenotype similar to that of bovine bone marrow cells. Furthermore, the endometrial stromal cells developed signs of osteogenesis, such as alizarin positive nodules. When the stromal cells were cultured in a specific osteogenic medium the cells rapidly developed the characteristics of mineralized bone. In conclusion, the present study has identified that stromal cells from the bovine endometrium show a capability for phenotype plasticity similar to mesenchymal progenitor cells. These observations pave the way for further investigation of the mechanisms of stroma cell differentiation in the bovine reproductive tract.
Separation of Amino Acid Enantiomers Using Precolumn Derivatization with o-Phthalaldehyde and 2,3,4,6-Tetra-O-acetyl-1-thio-β-glucopyranoside (1987)

Abstract A method is described for resolution of amino acid enantiomers. The D- and L-amino acids were reacted with o-phthalaldehyde (OPA) and the optically active 2,3,4,6-tetra-O-acetyl-1-thio-β-glucopyranoside (TATG). The reaction was complete in a few minutes at room temperature and the derivatives were quite stable. The formed diastereomers were separated by reversed phase chromatography and the selectivity was generally good, except for lysine and ornithine. A mean separation factor (α) of 1.27 was obtained with acetonitrile as an organic modifier. The fluorescence excitation and emission maxima were at 342 nm and 410 nm respectively, and the electrochemical half-wave potential E½ ≡ 0.65–0.75 V. The detection limits (for L-leucine) were 23 pmol and 1 pmol (S/N 3:1) in the respective detection modes. With laser-induced fluorescence detection (He-Cd laser, 325 nm) and microcolumns, a detection limit in the fmol range is obtainable.
Deep Learning based Segmentation of Lumbar Vertebrae from CT Images (2018)

We present a method to address the challenging problem of automatic segmentation of lumbar vertebrae from CT images acquired with varying fields of view. Our method is based on cascaded 3D Fully Convolutional Networks (FCNs) consisting of a localization FCN and a segmentation FCN. More specifically, in the first step we train a regression 3D FCN (we call it “LocalizationNet”) to find the bounding box of the lumbar region. After that, a 3D U-net like FCN (we call it “SegmentationNet”) is then developed, which after training, can perform a pixel-wise multi-class segmentation to map a cropped lumber region volumetric data to its volume-wise labels. Evaluated on publicly available datasets, our method achieved an average Dice coefficient of 95.77 ± 0.81% and an average symmetric surface distance of 0.37 ± 0.06 mm.
Safe Control for Spiral Recovery of Unmanned Aerial Vehicle (2014)

With unmanned aerial vehicles (UAVs) widely used in both military and civilian fields, many events affecting their safe flying have emerged. That UAV’s entering into the spiral is such a typical safety issue. To solve this safety problem, a novel recovery control approach is proposed. First, the factors of spiral are analyzed. Then, based on control scheduling of state variables and nonlinear dynamic inversion control laws, the spiral recovery controller is designed to accomplish guidance and control of spiral recovery. Finally, the simulation results have illustrated that the proposed control method can ensure the UAV autonomous recovery from spiral effectively.
Determination of the Dielectric Constant of Nanoparticles. 1. Dielectric Measurements of Buckminsterfullerene Solutions (2000)

The static dielectric constant ε of buckminsterfullerene (C60) particles is determined in cis-decalin, toluene, and 1,2-dichlorobenzene using continuum models for spherical and spherical shell inclusions. The value for ε for isolated C60 in cis-decalin and toluene agrees well with molecular beam measurements using a spherical shell model, but the ε estimate in the highly polar solvent 1,2-dichlorobenzene deviated from these other measurements. Complications of measurements in highly polar solvents are summarized. We conclude that virial measurements have a great potential for determining the effective properties of nanoparticles from the properties of nanofilled materials over a range of dilute filler concentrations.
Calculation of the composition of plasma of an arc pulsed discharge in a multichamber arrester (2015)

The composition of plasma of an arc pulsed discharge in a multichamber arrester is calculated. The reasons for choosing the specific chemical components included into this calculation are given. The system of nonlinear equations for calculating the plasma composition is described. The sources of data for the calculation are specified. The calculation results are detailed and analyzed. Further uses of the results of calculation of the composition of such plasma are described.
Fabrication of 3D Printing Scaffold with Porcine Skin Decellularized Bio-Ink for Soft Tissue Engineering (2020)

Recently, many research groups have investigated three-dimensional (3D) bioprinting techniques for tissue engineering and regenerative medicine. The bio-ink used in 3D bioprinting is typically a combination of synthetic and natural materials. In this study, we prepared bio-ink containing porcine skin powder (PSP) to determine rheological properties, biocompatibility, and extracellular matrix (ECM) formation in cells in PSP-ink after 3D printing. PSP was extracted without cells by mechanical, enzymatic, and chemical treatments of porcine dermis tissue. Our developed PSP-containing bio-ink showed enhanced printability and biocompatibility. To identify whether the bio-ink was printable, the viscosity of bio-ink and alginate hydrogel was analyzed with different concentration of PSP. As the PSP concentration increased, viscosity also increased. To assess the biocompatibility of the PSP-containing bio-ink, cells mixed with bio-ink printed structures were measured using a live/dead assay and WST-1 assay. Nearly no dead cells were observed in the structure containing 10 mg/mL PSP-ink, indicating that the amounts of PSP-ink used were nontoxic. In conclusion, the proposed skin dermis decellularized bio-ink is a candidate for 3D bioprinting.
Conditions for the stability of wireless ARQ protocols and reliable communications (2009)

We consider ARQ protocols which vary the error probabilities per retransmission, having no channel state information at the transmitter. Such protocols can be described by irreducible and aperiodic discrete time Markov chains with countably infinite states of a specific form. Ergodicity of such chains guarantees finite expected delay until correct reception as well as positive throughput. Initiating from general stability criteria we formulate and prove necessary and sufficient conditions for recurrence, ergodicity and non-ergodicity for the chains of interest. The conditions are applied to the case of retransmissions via a Rayleigh fading channel to obtain recurrence and ergodicity conditions based on power allocation per retransmission.
Fast and Reversible Direct CO2 Capture from Air onto All-Polymer Nanofibrillated Cellulose—Polyethylenimine Foams (2015)

Fully polymeric and biobased CO2 sorbents composed of oxidized nanofibrillated cellulose (NFC) and a high molar mass polyethylenimine (PEI) have been prepared via a freeze-drying process. This resulted in NFC/PEI foams displaying a sheet structure with porosity above 97% and specific surface area in the range 2.7-8.3 m(2)·g(-1). Systematic studies on the impact of both PEI content and relative humidity on the CO2 capture capacity of the amine functionalized sorbents have been conducted under atmospheric conditions (moist air with ∼400 ppm of CO2). At 80% RH and an optimum PEI content of 44 wt %, a CO2 capacity of 2.22 mmol·g(-1), a stability over five cycles, and an exceptionally low adsorption half time of 10.6 min were achieved. In the 20-80% RH range studied, the increase in relative humidity increased CO2 capacity of NFC/PEI foams at the expense of a high H2O uptake in the range 3.8-28 mmol·g(-1).
Aggregate modeling of multi-processing workstations (2008)

In this paper an aggregate model for manufacturing systems consisting of flow lines with finite buffers and parallel servers is proposed. The proposed model is a multi-server station with process times depending on the work in process (WIP). An algorithm is developed to measure the WIP-dependent process times directly from industrial data such as arrival times at and departure times from the manufacturing system. Simulation results show that the aggregate model accurately predicts the mean flow time.
Maternal near miss and mortality due to postpartum infection: a cross-sectional analysis from Rwanda (2016)

Peritonitis-primarily as a result of cesarean deliveries-is associated with significant morbidity and mortality in our population.
Electrohydrodynamic printing for scalable MoS2flake coating: application to gas sensing device (2016)

Scalable sub-micrometer molybdenum disulfide ([Formula: see text]) flake films with highly uniform coverage were created using a systematic approach. An electrohydrodynamic (EHD) printing process realized a remarkably uniform distribution of exfoliated [Formula: see text] flakes on desired substrates. In combination with a fast evaporating dispersion medium and an optimal choice of operating parameters, the EHD printing can produce a film rapidly on a substrate without excessive agglomeration or cluster formation, which can be problems in previously reported liquid-based continuous film methods. The printing of exfoliated [Formula: see text] flakes enabled the fabrication of a gas sensor with high performance and reproducibility for [Formula: see text] and [Formula: see text].
A multifunctional liquid chromatographic detector (1985)

A liquid chromatographic detector is described that monitors chromatographic column eluents simultaneously by UV absorption at 254 nm, fluorescence by excitation at 254 nm and electrical conductivity. The response of the detector has a linear range of over three orders of magnitude for each detecting function. The absolute sensitivities, defined as that concentration of solute that provides a signal to noise ratio of two, are 1.7 × 10–7 g ml–1 of toluene, 2.5 × 10–8 g ml–1 of dansylisoleucine and 5 × 10–8 g ml–1 of sodium chloride for JV absorption, fluorescence and electrical conductivity, respectively. The detector employs low-dispersion, serpentine tubing for column detector connections and has a cell volume of 2.2 µl. The dispersion of the detector has a standard deviation of only 2.8 µl at a flow-rate of 2 ml min–1 and is this suitable for use with modern high-speed 3-µm columns or high mass sensitivity, low solvent consumption, small bore columns. In addition to providing a simple basic detector with increased flexibility and versatility, simultaneous monitoring on all three functions can provide added confirmation of solute identification.
Direct synthesis of ordered mesoporous polymer and carbon materials by a biosourced precursor (2011)

Ordered mesoporous polymer and carbon materials were prepared with a one-pot green chemistry synthesis using tannin as a biosourced carbon precursor. The process is based on the evaporation-induced self-assembly of the tannin with an amphiphilic surfactant. Tannin self-condensation polymerization reactions were used to avoid any carcinogenic cross-linkers such as formaldehyde and to improve the thermal stability of the intermediate ordered mesophase. The calcinations of the mesophase lead to polymer and carbon materials having a hexagonal array of mesopores beside micropores.
StarFire� SF3: Worldwide Centimeter-Accurate Real Time GNSS Positioning (2016)

In 2003, John Deere launched the StarFire™ SF2 a global, real-time 10cm Precise Point Positioning (PPP) service. The StarFire™ SF2 service was upgraded in 2011 to support both GPS and GLONASS corrections. The enhanced service employed John Deere proprietary algorithms tailored to provide significantly improved performance providing worldwide 5cm horizontal accuracy without the need for local base stations. This paper will discuss the recent development of the John Deere StarFire™ 6000 receiver and SF3 technology. A high level overview of the StarFire™ SF3 architecture will be presented. Taking advantage of a global reference receiver network consisting of over 60 homogeneous StarFire GNSS receivers, the real-time StarFire™ SF3 correction signals (including precise GNSS satellite orbits, clocks and satellite bias corrections) are generated and broadcast globally via geostationary satellites to users in the field. The StarFire™ SF3 employs GNSS PPP ambiguity resolution on a global scale for both the StarFire network and users’ StarFire GNSS receivers. The John Deere StarFire™ 6000 receivers, with integrated multiple StarFire L-band signal tracking, can provide worldwide centimeter-level, real-time precise positioning using the StarFire™ SF3 service without the need for local or regional reference station infrastructure. The performance of StarFire™ SF3 will be presented in terms of improved positioning accuracy, repeatability and reduced convergence time. Some innovative features including Rapid Recovery, Quick Start, In-Season-Repeatability and a significantly improved RTK Extend™ will also be discussed in this paper.
Time-Dependent Thrombus Resolution After Tissue-Type Plasminogen Activator in Patients With Stroke and Mice (2015)

Early administration of tPA after stroke onset is associated with better thrombus resolution.
Analyse de l'amorçage de fissures dans une tôle fine en fatigue oligocyclique et sous sollicitations biaxiales (2013)

Le matériau utilisé (alliage de titane T35) est le constituant d’un liner fin utilisé dans les réservoirs de satellites. Lors de la phase de test du réservoir, celui-ci est mis sous pression de manière répétée pour démontrer sa résistance à des sollicitations de fatigue oligocyclique. Ce chargement cyclique est la cause de déformations plastiques cycliques dans le liner, dont l’amplitude dépend de la position dans le liner. L’objectif de ce travail est la reproduction expérimentale des conditions de déformation calculées et la détermination d’un nombre de cycles à amorçage pour le matériau considéré. La difficulté d’imposer une déformation cyclique de cette amplitude à une tôle de 0,3 mm d’épaisseur implique des dispositions expérimentales particulières. Un essai de fatigue oligocyclique biaxiale a été développé pour la machine ASTREE. Un montage de anti-flambement dédié a été nécessaire pour réaliser cet essai. Les essais biaxiaux ont été l’occasion d’imposer à la tôle de T35 les sollicitations les plus proches de celles calculées et d’observer l’amorçage des défauts dans ces conditions grâce aux mesures de champs à travers le dispositif anti-flambement. Les résultats confirment la faisabilité d’essais de traction/compression sur tôles fines dans la machine ASTREE dans ces conditions de sollicitation.
ORTHOGONAL MAIN-EFFECT PLANS (1961)

Abstract : The development and presentation of orthogonal main-effect plans are presented. These plans permit uncorrelated estimates of all main effects of both symmetrical and asymmetrical factorial experiments with a minimum number of trials. An account is given of the development of orthogonal main-effect plans for symmetrical and asymmetrical factorial experiments. The plans for asymmetrical experiments are based on the proposition that if the levels of a factor occur with the levels of another factor with proportional frequencies then the two factors are orthogonal. The possibilities of blocking these plans, the efficiencies of the estimates, the randomization procedure and the method of analysis are discussed. A catalogue of orthogonal main-effect plans is included which consists of the treatment combinations of 26 basic plans, involving factors with up to 9 levels and with up to 81 trials, from which all orthogonal main-effect plans which can be constructed with 81 or fewer trials may be deduced.
Synthetic Studies on the Stemona Alkaloids; Stereochemical Course of PhSe+-Induced Seven-Membered Ring Formation (1990)

The stereochemical course of an electrophilically driven azepane ring forming reaction studied during efforts to synthesize the alkaloid tuberostemonine is reported.
CF Activation of Fluorobenzene by Silylium Carboranes: Evidence for Incipient Phenyl Cation Reactivity (2010)

Saurer Angriff: Die C-F-Aktivierung von Fluorbenzol gelang mit den äußerst starken Silyl-Lewis-Säuren [Et3Si(X)]+ (X=PhF oder Et3SiH) und [(2,6-Dixylyl-C6H3)SiMe2]+ im Team mit dem Anion CHB11Cl11−. Sie spalten Fluorid aus nichtaktiviertem Fluorbenzol ab und liefern so arylierte Produkte, entsprechend einer Phenylkation-artigen Reaktivität (siehe Schema). Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Low gas pressure operation to improve performances of Multi-Grid detectors (2017)

Former Multi-Grid prototypes developed in collaboration between ILL, ESS and Linkoping University have shown their great potential to replace Helium-3-based detectors [1, 2]. Recently, a long-run operation performed at SNS [3] demonstrated the reliability of the Multi-Grid technology.