gebhart/patrepeval huggingface dataset:
Some unusual properties of activated and reduced AgNaA zeolites (1979)

Carbon monoxide, oxygen and hydrogen were found to be chemisorbed on dehydrated AgA zeolites. This was investigated in detail using volumetric sorption and temperature programmed desorption techniques. Also i.r. and mass spectrometry were used to characterize the solid and the desorbed molecules.It was found that as a result of an auto-reductive process, colour centres are created upon degassing of the zeolite. These centres sorb hydrogen and oxygen dissociatively, while one molecule of carbon monoxide was chemisorbed per Ag ion available in the supercage. It is proposed that linear Ag+3 clusters are formed upon activation, the ends of which constitute chemisorption sites for hydrogen and oxygen.
MRI Study about the Early Changes of Lumbar Disk Degeneration using Magnetization Transfer Contrast (MTC) (1995)

PURPOSE: To obtain magnetization transfer ratio(MTR) of the annulus fibrosus and nucleus pulposus and to0aassess the feasibility of utilizing the changes of these MTRs as an early indicator of disk degeneration.0aMATERIALS AND METHODS: MR images of lumbar spine with magnetization transfer(MT) technique in 420apatients were obtained. spin echo techniques (600/14) with same TR/TE with 1KHz off-resonance saturation0awere employed in 1.0T MR system. MTRs were calculated in two regions, anterior annulus fibrosus and nucleus0apulposus, and the results were compared between the normal and degenerative disks, from grade I to IV, on0aT2-weighted images.0aRESULTS: MTRs of the nucleus pulposus were 17.6% in the normal disks, and 26.7%, 28.4%, 29.1%, 29.7% in0adegenerative disks, from grade I to IV, respectively, with a significant difference(P<0.05). On the other hand,0aMTRs in the annulus fibrosus were 30.2% in the normal disks and 31.5%, 33.2%, 32.1% and 35.6% in degenerative0adisks, from grade I to IV, respectively, without significant difference.0aCONCLUSION: Since MTRs are significantly higher in degenerative nucleus pulposus than those of the normal0adisks, increased MTRs in the nucleus pulposus can be used as an early sign of the degeneration of the nucleus0apulposus.
An Original Valveless Artificial Heart Providing Pulsatile Flow Tested in Mock Circulatory Loops (2017)

The RollingHeart represents a new approach in the domain of total artificial heart. This preliminary study endorses the feasibility of a single valveless device acting as a total artificial heart.
Cellulose regeneration and spinnability from ionic liquids (2015)

Ionic liquid solutions of cellulose can be spun into Lyocell-type textile fibers by dry-jet wet spinning.
Rod Origin of Prolonged Afterimages (1974)

Afterimages fade against any unchanging background but generally reappear if the background changes suddenly. Under some conditions, however, a change of background color fails to revive a faded afterimage. This happens only if the interchanged backgrounds equally stimulate the rod receptors. It follows that afterimages seen under these conditions are generated by rods.
Structural and functional models of the dimanganese catalase enzymes. 3. Kinetics and mechanism of hydrogen peroxide dismutation (1994)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural and functional models of the dimanganese catalase enzymes. 3. Kinetics and mechanism of hydrogen peroxide dismutationP. J. Pessiki and G. C. DismukesCite this: J. Am. Chem. Soc. 1994, 116, 3, 898–903Publication Date (Print):February 1, 1994Publication History Published online1 May 2002Published inissue 1 February 1994https://pubs.acs.org/doi/10.1021/ja00082a009https://doi.org/10.1021/ja00082a009research-articleACS PublicationsRequest reuse permissionsArticle Views692Altmetric-Citations78LEARN 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
ChemInform Abstract: endo‐Selective Cyclizations of Selenonium Ion Intermediate: Efficient Formation of 1‐Halo‐3‐RSe‐cyclohexanes. (1991)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Shape transition of the discharge ion distribution around an anode wire of a gas counter (1988)

The discharge-ion density around an anode wire of a gas counter has been measured with a cylindrical counter having a rotating electrode. The azimuthal ion density has been determined from raw data of the induced signals in the rotating electrode by solving a set of linear equations with an analytical weighting function. The results are given as a function of the anode high voltage. The angular width of the discharge-ion density shows a transition between the proportional- and streamer-mode operations of the counter. This is considered evidence of a shape transition of the discharge-ion density around the anode wire of the gas counter in high-electric-field operation.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
A learning path for rational numbers through different representations (2019)

In this paper, we aim to understand, in a context of teachers’ collaborative group, how emphasizing multiple representations can contribute to the learning of the rational numbers by elementary school students. We report part of a Design Based Research, within which a learning path for rational numbers was constructed and implemented in grade 3 classes. Data was collected through audio recordings of the collaborative group sessions, written records of the teachers’ and students’ interactions, as well as photo records of classroom work. We analyse two tasks focusing on students’ rational number learning of two classes, through discussion and reflection in the collaborative group. The results show that enactive and iconic representations, used as models in a recurrent way, support an intertwined understanding of symbolic representations. We conclude that the collaborative group work was essential to bring research into the classroom.
Three‐dimensional imaging of fibrous cap by frequency‐domain optical coherence tomography (2011)

Histopathological data correlated the presence of thin-cap fibroatheroma (TCFA) with adverse cardiovascular events. Intravascular optical coherence tomography (iOCT) is currently the only imaging modality with sufficiently high axial resolution (∼15 μm) that allows direct fibrous-cap (FC) assessment in vivo. iOCT quantification of TCFA has been validated, but the assessment of a single cross-sectional image does not depict the complexity of the atherosclerotic plaque. We present two cases that illustrate the importance of three-dimensional volumetric quantification of the FC capitalizing on the properties of frequency-domain iOCT.
Group-guaranteed channel capacity in multimedia storage servers (1997)

One of the open questions in the design of multimedia storage servers is in what order to serve incoming requests. Given the capability provided by the disk layout and scheduling algorithms to serve multiple streams simultaneously, improved request scheduling algorithms can reduce customer waiting times. This results in better service and/or lower customer loss. In this paper we define a new class of request scheduling algorithms, called Group-Guaranteed Server Capacity (GGSC), that preassign server channel capacity to groups of objects. We also define a particular formal method for computing the assigned capacities to achieve a given performance objective. We observe that the FCFS policy can provide the precise time of service to incoming customer requests. Under this assumption, we compare the performance of one of the new GGSC algorithms, GGSC W -FCFS, against FCFS and against two other recently proposed scheduling algorithms: Maximum Factored Queue length (MFQ), and the FCFS-n algorithm that preassigns capacity only to each of the n most popular objects. The algorithms are compared for both competitive market and captured audience environments.Key findings of the algorithm comparisons are that: (1) FCFS-n has no advantage over FCFS if FCFS gives time of service guarantees to arriving customers, (2) FCFS and GGSC W -FCFS are superior to MFQ for both competitive and captive audience environments, (3) for competitive servers that are configured for customer loss less than 10%, FCFS is superior to all other algorithms examined in this paper, and (4) for captive audience environments that have objects with variable playback length, GGSC W -FCFS is the most promising of the policies considered in this paper. The conclusions for FCFS-n and MFQ differ from previous work because we focus on competitive environments with customer loss under 10%, we assume FCFS can provide time of service guarantees to all arriving customers, and we consider the distribution of customer waiting time as well as the average waiting time.
Comparison of Ge-doped TL optical fibres and glass beads with ion chamber and Gafchromic film for small field photon dosimetry (2013)

Small field (≤ 4 × 4 cm) photon radiotherapy treatments include intensity-modulated radiation therapy (IMRT)and stereotactic body radiation therapy (SBRT). These require small, high spatial resolution dosimeters of adequate dynamic range. In this study, field sizes of 1 cm × 1 cm, 2 cm × 2 cm, 3 cm × 3 cm, 4 cm × 4 cm, and 10 cm × 10 cm have been investigated using commercially available silica-based fibres and glass beads (GB) as TL dosimeters and a Varian linear accelerator operating at 6, 10 and 15 MV. Ge-doped SiO2 fibres have previously been shown by this group to offer a viable system for use as dosimeters. The fibres and GB, offer good spatial resolution (∼120 μm and 2 mm respectively), large dynamic dose range (with linearity from tens of mGy up to well in excess of many tens of Gy), a non-hygroscopic nature and low cost. The main aim of this present work is to investigate the use of Ge-doped optical fibres and GBs as thermoluminescence dosimeters in small photon fields for different photon beam energies, comparing the measurements against Gafchromic films, hospital commissioning data obtained from small ionisation chambers and photon diodes and Monte Carlo simulations with FLUKA and BEAMnrc.
In Silico Models for Dynamic Connected Cell Cultures Mimicking Hepatocyte-Endothelial Cell-Adipocyte Interaction Circle (2014)

The biochemistry of a system made up of three kinds of cell is virtually impossible to work out without the use of in silico models. Here, we deal with homeostatic balance phenomena from a metabolic point of view and we present a new computational model merging three single-cell models, already available from our research group: the first model reproduced the metabolic behaviour of a hepatocyte, the second one represented an endothelial cell, and the third one described an adipocyte. Multiple interconnections were created among these three models in order to mimic the main physiological interactions that are known for the examined cell phenotypes. The ultimate aim was to recreate the accomplishment of the homeostatic balance as it was observed for an in vitro connected three-culture system concerning glucose and lipid metabolism in the presence of the medium flow. The whole model was based on a modular approach and on a set of nonlinear differential equations implemented in Simulink, applying Michaelis-Menten kinetic laws and some energy balance considerations to the studied metabolic pathways. Our in silico model was then validated against experimental datasets coming from literature about the cited in vitro model. The agreement between simulated and experimental results was good and the behaviour of the connected culture system was reproduced through an adequate parameter evaluation. The developed model may help other researchers to investigate further about integrated metabolism and the regulation mechanisms underlying the physiological homeostasis.
Non-muscle myosin II heavy chain has a cryptic cell-adhesion domain (1995)

We have discovered a cryptic cell-adhesion domain in non-muscle myosin II heavy chain. A 205 kDa cell-adhesion-promoting polypeptide (p205) was extracted from BHK cells by Nonidet P-40 or Dounce homogenization. Adhesion to p205 was specifically inhibited by the peptide Gly-Arg-Gly-Asp-Ser-Pro, indicating a role for the Arg-Gly-Asp cell-adhesion motif. Purified p205 was identified as non-muscle myosin II heavy chain, based on sequence analysis and on the cross-reactivity of p205 with anti-(bovine trachea myosin) antibodies. Further experiments showed that the heavy chain of purified myosin II has cell-adhesion-promoting activity in a cell-blotting assay, and cross-reacted with anti-p205 antibodies. Finally, the adhesion domain was located in the tail portion of myosin II heavy chain, where an Arg-Gly-Asp-containing sequence can be found.
Nerve-mediated motility of ileal segments isolated from NK<sub>1</sub>receptor knockout mice (1999)

Tachykinins such as substance P (SP) and neurokinin A (NKA) acting on neurokinin (NK) receptors modulate the nonadrenergic noncholinergic (NANC) neurotransmission in the gastrointestinal tract of several species, but the information about the mouse small intestine is scanty. Both SP and NKA induced concentration-dependent contractions of ileal segments isolated from wild-type mice that were blocked by NK 1 and NK 2 antagonists, respectively. In contrast, segments isolated from NK 1 receptor (NK 1 -R) knockout mice responded only to elevated concentrations of SP. To reveal the inhibitory NANC (iNANC) responses, tissues were pretreated with atropine and guanethidine. Under these conditions, a tetrodotoxin-sensitive relaxation in response to electrical field stimulation (EFS) was observed. NK 1 -R knockout mice presented a trend toward an increase in iNANC responses, whereas the NK 1 -R antagonist significantly potentiated iNANC relaxation in tissues isolated from wild-type mice. N G -nitro-l-arginine methyl ester (100 μM) transformed the relaxant response to EFS into a tetrodotoxin-sensitive, frequency-dependent contraction characteristic of an excitatory NANC (eNANC) system. A NK 1 -R antagonist abolished the contractile responses of the mouse ileum to EFS, whereas a NK 2 receptor antagonist had a trend toward reducing EFS-induced contraction. The eNANC component was absent in NK 1 -R knockout mice. Measurement of SP-like immunoreactivity indicated similar amounts of SP per gram of tissue isolated from wild-type and NK 1 -R knockout mice, indicating that the observed differences in response to EFS were not due to a differential peptide content. It is concluded that, in the mouse ileum, both NK 1 and NK 2 receptors modulated the responses to exogenous tachykinins, whereas NK 1 is the primary tachykinin receptor involved in both iNANC and eNANC transmission.
Laser Based Angle-Resolved Photoemission, the Sudden Approximation, and Quasiparticle-Like Spectral Peaks in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>Bi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>CaCu</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mrow><mml:mn>8</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math> (2006)

A new low photon energy regime of angle-resolved photoemission spectroscopy is accessed with lasers and used to study the high T(C) superconductor Bi2Sr2CaCu2O(8+delta). The low energy increases bulk sensitivity, reduces background, and improves resolution. With this we observe spectral peaks which are sharp on the scale of their binding energy--the clearest evidence yet for quasiparticles in the normal state. Crucial aspects of the data such as the dispersion, superconducting gaps, and the bosonic coupling kink are found to be robust to a possible breakdown of the sudden approximation.
Molecular diversity of glucose-6-phosphate dehydrogenase: rat enzyme structure identifies NH2-terminal segment, shows initiation from sites nonequivalent in different organisms, and establishes otherwise extensive sequence conservation. (1988)

The NH2-terminal region of rat liver glucose-6-phosphate dehydrogenase (EC 1.1.1.49) is shown to differ radically from a reported amino acid sequence for the fruit fly enzyme and from one for the human enzyme. The results indicate considerable differences in the translational start point. However, a close relationship with another reported sequence for the human enzyme is established, now showing agreement between an indirectly deduced and a directly analyzed NH2-terminal structure of this enzyme type. The results provide evidence of one structural motif common to mammalian species but also suggest that genetic inconstancy 5' to, or at the start of, the region coding for the enzyme protein could be a source of intra- and interspecies diversity. This is of interest in relation to the large number of genetic variants of human glucose-6-phosphate dehydrogenase.
WiSec 2011 demo (2011)

Municipal Wi-Fi networks aim at city-wide wireless access to selected city services for a variety of users. Collaborative Muni-Fi approaches use existing private access points and provide controlled access to these services. However, the distributed and decentralized nature of a network comprised of strangers makes access control challenging. We present two design options for including mobile clients in such system: a client and a network centric design. For both designs we briefly discuss aspects of security and device mobility.
Simulation of Ad hoc Networks in ReactiveML (2006)

County-level ecological factors are strongly associated with survival among individuals with EOCRC. Yet there is some evidence of survival disparities among individuals with distant malignancies that remain unexplained by the included factors.
Vergleichende hämodynamische Untersuchungen bei Ballonpulsation mit geradem (Aorta descendens) und mit gebogenem Ballon (Aortenbogen) (1971)

Article Vergleichende hämodynamische Untersuchungen bei Ballonpulsation mit geradem (Aorta descendens) und mit gebogenem Ballon (Aortenbogen) was published on January 1, 1971 in the journal Biomedical Engineering / Biomedizinische Technik (volume 16, issue 3).
Honeywell gun-hard inertial measurement unit (IMU) development (2004)

Honeywell has designed and manufactured a gun-hard IMU that provides the baseline for meeting the needs of DoD guided tactical munitions, as well as being a platform for commercial usage. The gun-hard IMU is a solid-state inertial sensor package that measures and provides inertial angular rates and linear accelerations in a body-mounted strap-down mechanization. Its compensated outputs include summed and incremental angle and velocity data for inertial guidance, as well as angular rates and linear accelerations for autopilot/control functions. The data are reported in user-defined coordinates at 600 Hz and 100 Hz (typically) through a digital serial interface bus. The unit contains three Honeywell MEMS silicon gyroscopes, three Honeywell MEMS silicon accelerometers, as well as the electronics and software necessary to implement the requirements of the tactical market. The Honeywell gun-hard IMU development team includes multiple Honeywell sites and Draper Laboratories. In 2003, Honeywell demonstrated IMU survival and performance above 10,000 g's. In 2004, Honeywell will produce and deliver an IMU that will survive and perform at 20,000 g's. In addition to providing gun-hard survivability and high performance, Honeywell will capitalize on its extensive production experience to ensure a device that is cost effective for Honeywell customers.
Enhancement of high-order harmonic emission using attosecond pulse trains (2005)

We theoretically predict and experimentally confirm that enhancement of high-order harmonic generation is possible by combining an attosecond pulse train with an IR driving laser. This combination replaces the disadvantages of tunnel ionization with single-photon ionization and permits the manipulation of the time-frequency properties of high-order harmonic generation already at the single-atom level. Copyright © 2005 by Astro, Ltd.
Design and Optimisation of SOFC System Components using a Trio Approach: Measurements, Design of Experiments, and 3D Computational Fluid Dynamics (2009)

In this present paper, a comprehensive trio approach has been proposed to aid in the optimisation of the pre-reforming process, and to develop a new pre-reformer design. Measurements, design of experiments (DOE), and computational fluid dynamics (CFD) have been employed to determine the effects of several design and material parameters on the pre-reformer performance in detail. The optimisation procedure considers geometrical modifications, material alternatives and the feasibility of the end product simultaneously, in order to achieve efficient reforming rates by reduced component weight.
High-frequency synchronized signal generation using semiconductor lasers (1999)

Generation of high-speed optical pulses is an important technology for not only optical data transmission/processing, but also optical subcarrier transmission in wireless-access networks. Semiconductor lasers are the most promising optical pulse sources for these application fields. The typical methods of generating optical pulses with repetition frequencies of up to subterahertz from semiconductor lasers are reviewed in this paper. Synchronization of subterahertz optical pulses to an electrical clock and suppression of phase noise are essential for many applications. A few techniques that enable free-running subterahertz pulses to be synchronized to a given clock with lower frequency are also introduced. Our experimental results on the synchronization of 0.2-THz free-running pulses generated from a harmonic colliding pulse mode-locked laser using photonic down-conversion with phase-locked loop (PDC-PLL) are described. It is shown theoretically and experimentally that the clock-source-limited low-timing-jitter subterahertz pulses can be generated using PDC-PLL.