gebhart/patrepeval huggingface dataset:
Particle size effect on microwave absorbing of La0.67Ba0.33Mn0.94Ti0.06O3 powders prepared by mechanical alloying with the assistance of ultrasonic irradiation (2016)

Doped manganites have attracted substantial interest due to their unique chemical and physics properties, which makes it possible to be used for microwave absorbing materials. In this paper we report synthesizes and characterization of La0.67Ba0.33Mn0.94Ti0.06O3 powders prepared by mechanical alloying with the assistance of a high power ultrasonic treatment. After solid state reaction, the presence of single phase was confirmed by X-ray Diffraction (XRD). Refinement results showed that samples are single phase with monoclinic structure. It was found that powder materials derived from mechanical alloying results in large variation in the particle size. A significant improvement was obtained upon subjecting the mechanically milled powder materials to an ultrasonication treatment for a relatively short period of time. As determined by particle size analyzer (PSA), the mean particle size gradually decreased from the original size of 5.02 µm to 0.36 µm. Magnetic properties were characterized by VSM, and hysteresis loops results showed that samples are soft magnetic. It was found that when the mean particle size decreases, saturation was increases and coersitivity was decreases. Microwave absorption properties were investigated in the frequency range of 8-12 GHz using vector network analyzer. An optimal reflection loss of 24.44 dB is reached at 11.4 GHz.
Association between extra- and intracranial calcifications of the internal carotid artery: a CBCT imaging study (2015)

We found that a significant correlation exists between extra- and intracranial calcifications of the ICA. It is clear that in cases of the presence of a calcification in the ICA extracranially, the artery's intracranial portion has an increased risk of showing the same findings. CBCT imaging is widely used as a diagnostic tool, thus, our results contribute to the identification of a subgroup of patients who should undergo further medical evaluation of the atherosclerosis of the ICAs.
Hybrid Numerical-Asymptotic Modeling of Electrically Large EM Structures (2006)

Abstract: Efficient numerical-asymptotic electromagnetic simulations of electrically large structures are presented based on an iterative hybridization of the method of moments (MoM) and physical optics (PO) in a higher order computational framework. The iterative MoM-PO technique employs multiple reflections between PO currents nested within an overall iterative MoM-PO multiple-reflection process. The results demonstrate an effective MoM-PO modeling of an automobile with a GSM 1900-MHz antenna and a substantial improvement in accuracy of the analysis of a characteristic reflector antenna geometry using the new technique with multiple PO-PO reflections over the standard higher order technique that neglects the mutual coupling between the currents in the asymptotic region of the structure.
Isolation and killing of candidate chronic myeloid leukemia stem cells by antibody targeting of IL-1 receptor accessory protein (2010)

Chronic myeloid leukemia (CML) is genetically characterized by the Philadelphia (Ph) chromosome, formed through a reciprocal translocation between chromosomes 9 and 22 and giving rise to the constitutively active tyrosine kinase P210 BCR/ABL1. Therapeutic strategies aiming for a cure of CML will require full eradication of Ph chromosome-positive (Ph(+)) CML stem cells. Here we used gene-expression profiling to identify IL-1 receptor accessory protein (IL1RAP) as up-regulated in CML CD34(+) cells and also in cord blood CD34(+) cells as a consequence of retroviral BCR/ABL1 expression. To test whether IL1RAP expression distinguishes normal (Ph(-)) and leukemic (Ph(+)) cells within the CML CD34(+)CD38(-) cell compartment, we established a unique protocol for conducting FISH on small numbers of sorted cells. By using this method, we sorted cells directly into drops on slides to investigate their Ph-chromosome status. Interestingly, we found that the CML CD34(+)CD38(-)IL1RAP(+) cells were Ph(+), whereas CML CD34(+)CD38(-)IL1RAP(-) cells were almost exclusively Ph(-). By performing long-term culture-initiating cell assays on the two cell populations, we found that Ph(+) and Ph(-) candidate CML stem cells could be prospectively separated. In addition, by generating an anti-IL1RAP antibody, we provide proof of concept that IL1RAP can be used as a target on CML CD34(+)CD38(-) cells to induce antibody-dependent cell-mediated cytotoxicity. This study thus identifies IL1RAP as a unique cell surface biomarker distinguishing Ph(+) from Ph(-) candidate CML stem cells and opens up a previously unexplored avenue for therapy of CML.
Degradation of mechanical properties of concrete caused by freeze-thaw action (2008)

A series of experimental studies of mechanical properties of concrete after freeze-thaw action have been conducted.These researches involved the damage caused by freeze-thaw action on compressive stress-strain relationship,splitting strength and mechanical behavior under repetitive load action.Moreover,according to bearing state of members in actual engineering,we also investigated the damage of frost-resisting and mechanical properties of concrete suffering from dual actions of compressive stress and freeze-thaw cycles.Experiment indicates that due to repeat freeze-thaw cycles,degradation of mechanical properties,including compression strength,splitting strength and repeated load-resistant property so on,is more serious,then degradation patterns correlated with freeze-thaw parameters of mechanical properties are found.Meanwhile a conclusion has been drawn that when bearing state of concrete is considered,the damage caused by freeze-thaw action is aggravated,and the degradation is more significant than that under single freeze-thaw action.This study may serve as a reference to establish frost-resisting durability design theory of concrete structure.
Efficient and Regioselective Synthesis of 2-Alkyl-2H-indazoles (2003)

An efficient and regioselective synthesis of 2-methyl-2H-indazoles and 2-ethyl-2H-indazoles using trimethyloxonium tetrafluoroborate or triethyloxonium hexafluorophosphate is reported.
Organofluoro-silica xerogels as high-performance optical oxygen sensors (2009)

Ubiquitous oxygen (O(2)) is one of the most important analytes to be assessed in medicine, industry and the environment. Due to a number of advantages, miniaturized optical sol-gel sensors are rapidly replacing older electrochemical sensors. This account provides an overview of fluorinated organically modified silicate (ORMOSIL) xerogels as optical chemical sensors and shows how, together with the dye quenching rate, the subtle structural features of an organofluoro-silica matrix is of fundamental importance in determining the overall sensor performance.
Catalyst Design by Interpolation in the Periodic Table:  Bimetallic Ammonia Synthesis Catalysts (2001)

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTCatalyst Design by Interpolation in the Periodic Table: Bimetallic Ammonia Synthesis CatalystsClaus J. H. Jacobsen, Søren Dahl, Bjerne S. Clausen, Sune Bahn, Ashildur Logadottir, and Jens K. NørskovView Author Information Haldor Topsøe A/S, Nymøllevej 55 DK-2800 Lyngby, Denmark Center for Atomic-Scale Materials Physics (CAMP) Technical University of Denmark, Building 307 DK-2800 Lyngby, Denmark Cite this: J. Am. Chem. Soc. 2001, 123, 34, 8404–8405Publication Date (Web):August 3, 2001Publication History Received16 April 2001Revised21 June 2001Published online3 August 2001Published inissue 1 August 2001https://pubs.acs.org/doi/10.1021/ja010963dhttps://doi.org/10.1021/ja010963drapid-communicationACS PublicationsCopyright © 2001 American Chemical SocietyRequest reuse permissionsArticle Views15045Altmetric-Citations620LEARN 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 SUBJECTS:Activation energy,Adsorption,Ammonia,Catalysts,Nitrogen Get e-Alerts
Laparoscopic Partial Cystectomy for Urachal and Bladder Cancer (2008)

Laparoscopic partial cystectomy in carefully selected patients with urachal and bladder cancer is feasible and safe, offering a promising and minimally invasive alternative for these patients.
Ultraviolet-laser photolysis of disilane (1989)

A combination of optical probing techniques, including time-resolved emission spectroscopy, dye-laser absorption spectroscopy, laser-induced fluorescence, and intracavity laser spectroscopy (ILS), have been used to investigate the reaction paths for the ArF excimer laser (193 nm, 6.4 eV/photon) photolysis of disilane, Si2H6. The experiments were carried out in an ultrahigh vacuum system into which Si2H6 was introduced at pressures ranging from 1 to 10 mTorr. Optical emission due to the Si 1P→1S and SiH A2Δ→X2Π transitions was observed with intensity rise times, following the laser pulse, of less than 100 ns, the experimental resolution. This indicates that for the pressures used in these experiments, Si and SiH were generated purely photolytically rather than through collisional processes. The maximum intensities of the Si and SiH peaks were measured as a function of ArF laser-beam photon flux density Jhν. SiH2 was never detected, up to the highest Jhν values used, 4×1017 photons/cm2 pulse, even though with ILS, the most sensitive of the optical-absorption techniques, we were able to detect absorption peaks assignable to rotational transitions in the (020)–(000) vibronic bands of the Ã 1B1←X̃ 1A1 electronic transition during Si2H6 pyrolysis at ∼350 °C. Based upon these experimental results, a model for the ultraviolet-laser photolysis of Si2H6 was developed involving a three-step cascade one-photon absorption process.
Porphyrin assemblies on DNA as studied by a resonance light-scattering technique (1993)

Under appropriate conditions of concentration and ionic strength, trans-bis(N-methylpyridinium-4-yl)-diphenylporphine and its copper(II) derivative produce very large, bisignate circular dichroism signals in the Soret region when bound to DNA. The processes leading to these signals are shown to be highly cooperative. A new light-scattering experimental approach is described for detecting such extended aggregates of chromophores in which the radiation used is within an absorption maximum, specifically in the porphyrin Soret absorption region. Results from such resonance light-scattering experiments confirm that extended porphyrin aggregates form on the DNA, which, in contrast, remains dispersed. A model for these interactions consistent with experimental findings involves porphyrin organization into long-range chiral structures having antenna-like properties, that is, forming assemblies in which the electric field produced in one oscillating dipole affects the magnitude of (is coupled to) the other dipoles in the aggregate.
Silent Mischief: Bacteriophage Mu Insertions Contaminate Products of Escherichia coli Random Mutagenesis Performed Using Suicidal Transposon Delivery Plasmids Mobilized by Broad-Host-Range RP4 Conjugative Machinery (2010)

Random transposon mutagenesis is the strategy of choice for associating a phenotype with its unknown genetic determinants. It is generally performed by mobilization of a conditionally replicating vector delivering transposons to recipient cells using broad-host-range RP4 conjugative machinery carried by the donor strain. In the present study, we demonstrate that bacteriophage Mu, which was deliberately introduced during the original construction of the widely used donor strains SM10 λpir and S17-1 λpir, is silently transferred to Escherichia coli recipient cells at high frequency, both by hfr and by release of Mu particles by the donor strain. Our findings suggest that bacteriophage Mu could have contaminated many random-mutagenesis experiments performed on Mu-sensitive species with these popular donor strains, leading to potential misinterpretation of the transposon mutant phenotype and therefore perturbing analysis of mutant screens. To circumvent this problem, we precisely mapped Mu insertions in SM10 λpir and S17-1 λpir and constructed a new Mu-free donor strain, MFDpir, harboring stable hfr-deficient RP4 conjugative functions and sustaining replication of Π-dependent suicide vectors. This strain can therefore be used with most of the available transposon-delivering plasmids and should enable more efficient and easy-to-analyze mutant hunts in E. coli and other Mu-sensitive RP4 host bacteria.
The Impact of Analysts' Forecasts on Share Repurchases as Signals for Earnings (2010)

Outside shareholders may regard negative abnormal earnings, the amount by which actual earnings generated by firms fall short of what analysts forecasted, as bad news and expect that earnings will continuously decline. If managers are informed that earnings are getting better, not worse, we would expect to observe that they prompt share repurchases to signal their private information. Consistent with our expectations, we document a positive association between negative abnormal earnings and subsequent share repurchases. We also find such an association is more pronounced when managers establish a forecasting reputation among analysts. Key words: Abnormal earnings, share repurchases, signal
Measurement of initial absorption of fused silica at 193nm using laser induced deflection technique (LID) (2007)

The ongoing development in microlithography towards further miniaturization of structures creates a strong demand for lens material with nearly ideal optical properties. Beside the highly demanding requirements on homogeneity and stress induced birefringence (SIB), low absorption is a key factor. Even a small absorption is associated with a temperature increase and results in thermally induced local variations of refractive index and SIB. This could affect the achievable resolution of the lithographic process. The total absorption of the material is composed of initial absorption and of absorption induced during irradiation. Thus, the optimization of both improves the lifetime of the material. In principal, it is possible to measure transmission and scattering with a suitable spectrometer assembly and calculate absorption from them. However, owing to the influence of sample surfaces and errors of measurement, these methods usually do not provide satisfactory results for highly light-transmissive fused silica. Therefore, it is most desirable to find a technique that is capable of directly measuring absorption coefficients in the range of (1...10)&bull;10<sup>-4</sup> cm<sup>-1</sup> (base 10) directly. We report our first results for fused silica achieved with the LID technique. Besides a fused silica grade designed for 193 nm applications, grades with higher absorption at 193 nm were measured to test the LID technique. A special focus was set on the possibility of measuring initial absorption without the influence of degradation effects.
The incidence of hypotension during general anesthesia: a single-center study at a university hospital (2023)

IOH during general anesthesia was very frequent in the Japanese population. Female gender, vascular surgery, ASA-PA 4 or 5 in emergency surgery, and the combination with EDB were independent risk factors associated with IOH. However, the association with patient outcomes were not elucidated.
Factors Affecting Dark Germination of Oenothera lamarckiana Seeds (1987)

Effect of various physical and chemical treatments on dark germination of Oenothera lamarckiana seeds were primarily investigated to find out factors affecting germination. Germination of seeds which did not germinate in the constant temperature and darkness was induced by several physical treatments such as sonification, wetting and drying, freezing and thawing, and removal of seed coat. Pretreatment of chilling (), freezing () and incubation at high temperature () induced dark germination of seeds which did not germinate in the constant temperature ranges of 15 to under darkness. Alternating temperature also had a stimulatory effect on dark germination of Oenothera lamarckiana seeds. Sensing of seeds to alternating temperature appeared to be completed during the first two days after imbibition. The minimum difference of temperature required for dark germination was in the range of . A thiourea (1.0%) treatment induced dark germination, but GA, IAA, BA and Ethrel failed to do so.
PLAS: A compact, self-triggered, dead time-less, high channel count analog memory ASIC for TRACE (2015)

The readout system for the new TRACE detector requires monitorization and sampling of all pulses in a large number of channels with very strict space and power consumption restrictions for the front-end electronics and cabling. A triggerless solution has been chosen involving front-end analog memories that sample a 1 μs window of the waveform of any valid pulses at 200 MHz while performing zero suppression and serialization tasks. An analog memory ASIC named PLAS (for PipeLined Asymmetric SCA) is presented that allows pulse capture with no dead time in any channel while reducing die area requirements for high input channel counts. The circuit is based on a novel architecture where the typical Switched Capacitor Array (SCA) structure is partitioned into two asymmetric stages and FIFO queue-like control circuitry is introduced for captured data. The ASIC has been designed in 0.18 μm CMOS technology with 32 independent, self-triggered input channels and a size of 3.5 × 3.9mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . Simulations predict figures around 100MHz bandwidth, 12 ENOB and 10 mW per channel.
System for mechanical measurements during cardiopulmonary resuscitation in humans (1990)

Effective study of CPR requires measurement of the mechanical properties of the human chest and the resultant vascular pressures. A computer-based mobile data acquisition system was designed and built for this purpose. During manual CPR a short cylindrical module was placed between the rescuer's hands and the patient's chest. This module, which was attached to an easily manipulated position-sensing arm, measured force and acceleration at the sternum. Three-dimensional position and orientation of the module were measured, as well as the component of the applied force which was perpendicular to the sternum. The central venous and aortic pressures were measured by high fidelity pressure transducers. All transducer signals were recorded by digital computer. Real-time feedback of sternal force and displacement, and vascular pressures was provided to the rescue team via chart recordings. An audible signal was produced as an aid in maintaining desired compression rate and duration. The system's mobility permitted rapid implementation at any hospital location. In conclusion, this system was capable of measuring, recording, and displaying multiple physical quantities during manual CPR in humans.
Surgical widening of a stress fracture decreases local strains sufficiently to enable healing in a computational model (2015)

Stress fractures at the tibial diaphysis are prone to delayed union. We hypothesized that the interfragmentary strains in the gap tissue are of magnitudes that prohibit bone formation and healing. If so, a rational treatment would be to widen the fracture gap in order to decrease the strains. This could be achieved by replacing part of the fracture crack with a wide drilled hole. This study analyzes the biomechanical effects of this potential treatment through computational modeling. Poroelastic finite element models of an intact tibia, a tibia with a stress fracture, and a tibia with a drilled stress fracture were developed from clinical CT images. Loads corresponding to gait and stair climbing were simulated. Stresses, strains, and fluid velocities were evaluated for the bone in the tibia, and for the hypothetical soft tissue that fills the stress fracture. A minor decrease in the overall tibial stiffness (<9.9%) was noted as a result of drilling. The models predicted large interfragmentary strains in the soft gap tissue (max 35%) before drilling, which decreased substantially (<1%) after drilling. Thus, when comparing to current mechanobiological tissue differentiation theories, the authors believe that fracture gap widening by drilling a hole might facilitate healing of stress fractures.
Multiple attachment GaAs-on-Si hybrid optoelectronic/VLSI chips (2002)

For several years we have been developing an optoelectronic/VLSI (OE/VLSI) chip technology based on flipchip bonding of GaAs optoelectronic chips onto CMOS silicon followed by substrate removal. Our optoelectronic devices are currently surface normal modulators, which also function as the input detectors. Finally, we have demonstrated an OE/VLSI switching chip with >140000 CMOS gates and 4352 modulators that operated with a clock rate of 400 Mbit/sec.
The effect on gait of lengthening of the medial hamstrings in cerebral palsy. (1989)

The purpose of this study was to analyze the effect of lengthening of the medial hamstrings on the gait of patients who had spastic cerebral palsy. Thirty-one patients had preoperative and postoperative gait analyses. Standard parameters, such as velocity, cadence, and stride length, were evaluated, as were motion graphs of the hip, knee, and ankle. There was little difference between the preoperative and postoperative mean values for velocity, cadence, and stride length, which were expressed as percentages of normal for the patient's age. The contours of the postoperative motion graphs of the knees changed very little compared with those of the preoperative graphs; when a graph showed restricted motion preoperatively, it did so postoperatively. Although extension of the knee in stance phase improved postoperatively, the improvement was accompanied by decreased flexion of the knee during swing phase. When spasticity of both the hamstrings and the quadriceps was noted on the preoperative electromyogram, motion of the knee in the sagittal plane was markedly restricted.
ChemInform Abstract: tert‐Butoxycarbamate Group: A Useful Protecting Group for the Synthesis of Orthogonally Protected “Tropane‐Like” Scaffolds. (2000)

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.