gebhart/patrepeval huggingface dataset:
Nanoscale metal particles by homogeneous reduction with alkalides or electrides (1991)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNanoscale metal particles by homogeneous reduction with alkalides or electridesKuo Lih Tsai and James L. DyeCite this: J. Am. Chem. Soc. 1991, 113, 5, 1650–1652Publication Date (Print):February 1, 1991Publication History Published online1 May 2002Published inissue 1 February 1991https://pubs.acs.org/doi/10.1021/ja00005a031https://doi.org/10.1021/ja00005a031research-articleACS PublicationsRequest reuse permissionsArticle Views598Altmetric-Citations104LEARN 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
Molecular characterization of a second abortive phage resistance gene present in Lactococcus lactis subsp. lactis ME2 (1992)

The fifth phage resistance factor from the prototype phage-insensitive strain Lactococcus lactis subsp. lactis ME2 has been characterized and sequenced. The genetic determinant for Prf (phage resistance five) was subcloned from the conjugative plasmid pTN20, which also encodes a restriction and modification system. Typical of other abortive resistance mechanisms, Prf reduces the efficiency of plaquing to 10(-2) to 10(-3) and decreases the plaque size and burst size of the small isometric-headed phage p2 in L. lactis subsp. lactis LM0230. However, normal-size plaques occurred at a frequency of 10(-4) and contained mutant phages that were resistant to Prf, even after repeated propagation through a sensitive host. Prf does not prevent phage adsorption or promote restriction and modification activities, but 90% of Prf+ cells infected with phage p2 die. Thus, phage infections in Prf+ cells are aborted. Prf is effective in both L. lactis subsp. lactis and L. lactis subsp. cremoris strains against several small isometric-headed phages but not against prolate-headed phages. The Prf determinant was localized by Tn5 mutagenesis and subcloning. DNA sequencing identified a 1,056-nucleotide structural gene designated abiC. Prf+ expression was obtained when abiC was subcloned into the lactococcal expression vector pMG36e. abiC is distinct from two other lactococcal abortive phage resistance genes, abiA (Hsp+, from L. lactis subsp. lactis ME2) and abi416 (Abi+, from L. lactis subsp. lactis IL416). Unlike abiA, the action of abiC does not appear to affect DNA replication. Thus, abiC represents a second abortive system found in ME2 that acts at a different point of the phage lytic cycle.
A fast VLSI SRAM mapping methodology using voltage contrast techniques on SEM (1992)

International audience
Supplementary Figures S1-S4 from High IGF-IR Activity in Triple-Negative Breast Cancer Cell Lines and Tumorgrafts Correlates with Sensitivity to Anti–IGF-IR Therapy (2023)

&lt;p&gt;Supplementary Figures S1-S4.&lt;/p&gt;
RETRACTED ARTICLE: In situ structural characterization of early amyloid aggregates in Alzheimer’s disease transgenic mice and Octodon degus (2020)

Amyloid plaques composed of Aβ amyloid peptides and neurofibrillary tangles are a pathological hallmark of Alzheimer's disease. In situ identification of early-stage amyloid aggregates in Alzheimer's disease is relevant for their importance as potential targets for effective drugs. Synchrotron-based infrared imaging is here used to identify early-stage oligomeric/granular aggregated amyloid species in situ in the brain of APP/PS1 transgenic mice and Octodon degus for the first time. Also, APP/PS1 mice show fibrillary aggregates at 6 and 12 months whereas very little formation of fibrils is found in aged Octodon degus. Finally, significant decreased burden of early-stage aggregates and fibrillary aggregates is obtained following treatment with G4-His-Mal dendrimers (a neurodegenerative protector) in 6-month-old APP/PS1 mice, thus demonstrating putative therapeutic properties of G4-His-Mal dendrimers in AD models. Identification, localization, and characterization using infrared imaging of these non-fibrillary species in the cerebral cortex at early stages of AD progression in transgenic mice point to their relevance as putative pharmacological targets. No less important, early detection of these structures may be useful in the search for markers for non-invasive diagnostic techniques.
Selective hydrogenation of α,β-unsaturated aldehydes over Pt supported on cerium–zirconium mixed oxide of different composition (2022)

sponsorship: The work was supported by Russian Science Foundation (grant no. 17-73-20282) in the part related to catalytic studies and Ministry of Science and Higher Education of Russian Federation (grant no. 075-15-2021-591) in the part related to catalyst preparation and characterization. Scanning electron microscopy was performed in the Department of Structural Studies of N. D. Zelinsky Institute of Organic Chemistry,Moscow. (Russian Science Foundation|17-73-20282, Ministry of Science and Higher Education of Russian Federation|075-15-2021-591)
Binge Alcohol–Induced Microvesicular Liver Steatosis and Injury are Associated with Down‐Regulation of Hepatic Hdac1, 7, 9, 10, 11 and Up‐Regulation of Hdac3 (2012)

Deregulation of hepatic Hdac expression likely plays a major role in the binge alcohol-induced hepatic steatosis and liver injury by affecting lipogenesis and fatty acid β-oxidation.
Analysis of the Ability of Catcher's Masks to Attenuate Head Accelerations on Impact With a Baseball (2010)

Catcher's masks reduced head acceleration metrics by approximately 85%. Head acceleration metrics with a catcher's mask were significantly lower than contemporary injury thresholds, yet reports in the mass media clearly indicate that baseball impacts to the mask still occasionally result in mild traumatic brain injuries. Further research is needed to address this apparent contradiction.
Simultaneous measurements of velocity and density of transient flows using high-speed camera technique (Conference Presentation) (2018)

Imaging measurements of transient flow behavior in harsh environments are a demanding task in industrial development, e.g. regarding the reduction of pollutant and sound emissions of jet engines by means of lean combustion. Such processes can exhibit instabilities based on flame oscillations due to thermo-acoustic fluctuations of pressure and heat release rate, which potentially result in failure of the device. We present a characterization of the combustion by non-invasive measurements of the heat release rate inside the flame and the flow velocity at the combustor outlet. Additionally, measurements of local sound pressure fluctuations are presented. Simultaneous, seedingless, optical measurements of these quantities can be achieved using multiple laser-vibrometers and signal correlation [1, 2]. The measurement is based on the linear relation between the heat release rate or sound pressure and the change of the refractive index, which can be detected integral along the laser beam. Using multiple laser-vibrometers it is furthermore possible to measure the flow velocity due to the phase delay between two vibrometer signals and the known distance between the measurement positions. However, simultaneous field measurements have to be accomplished in order to detect the transient spatio-temporal flow behavior of the combustion and to enable tomographic reconstruction of the instable process. In order to overcome these limitations, a high-speed camera-based laser-vibrometer (CLIV) is designed for non-invasive seedingless measurements of the flow velocity and heat release rate inside premixed flames. The novel imaging CLIV offers single pixel resolution with measurement rates up to 40 kHz at an image resolution of 110 x 110 px, resulting in a high data rate of 0.5 GHz. A discussion of the traceability to SI units and the measurement uncertainty is presented. Spatially resolved simultaneous measurements of the heat release rate and its temporal fluctuations inside a swirl-stabilized flame are demonstrated. Subsequently, the calculation of the flow velocity field inside the flame is performed by means of signal correlation between different pixel data. Additionally, local sound pressure fluctuations are detected using the novel system in combination with tomographic reconstruction. References [1] J. Gürtler, F. Greiffenhagen, J. Peterleithner, J. Woisetschläger, D. Haufe, J. W. Czarske, “Noninvasive seedingless measurements of the flame transfer function using high-speed camera-based laser vibrometry”, SPIE Optical Metrology, Optical Measurement Systems for Industrial Inspection, Proceedings pp. [10329-66], Munich, Germany, 26.06. – 29.06.2017 [2] S. Köberl, F. Fontaneto, F. Giuliani, J. Woisetschläger, “Frequency resolved interferometric measurement of local density fluctuations for turbulent combustion analysis”, Meas. Sci. Technol., 21:035302 (10pp), 2010.
A 9.6-Gb/s HEMT ATM switch LSI with event-controlled FIFO (1993)

An asynchronous-transfer-mode (ATM) switch LSI was designed for the broadband integrated services digital network (B-ISDN) and fabricated using 0.6- mu m high-electron-mobility-transistor (HEMT) technology. To enhance the high-speed performance of direct-coupled FET logic (DCFL), event-controlled logic was used instead of conventional static memory for the first-in first-out (FIFO) buffer circuit. The 4.8-mm*4.7-mm chip contains 7100 DCFL gates. The maximum operating frequency was 1.2 GHz at room temperature with a power dissipation of 3.7 W. The single-chip throughput was 9.6 Gb/s. An experimental 4-to-4 ATM switching module using 16 switch LSIs achieved a throughput of 38.4 Gb/s.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
Enabling Building Information Model-Driven Human-Robot Collaborative Construction Workflows with Closed-Loop Digital Twins (2023)

The introduction of assistive construction robots can significantly alleviate physical demands on construction workers while enhancing both the productivity and safety of construction projects. Leveraging a Building Information Model (BIM) offers a natural and promising approach to driving robotic construction workflows. However, because of uncertainties inherent in construction sites, such as discrepancies between the as-designed and as-built components, robots cannot solely rely on a BIM to plan and perform field construction work. Human workers are adept at improvising alternative plans with their creativity and experience and thus can assist robots in overcoming uncertainties and performing construction work successfully. In such scenarios, it is critical to continuously update the BIM as work processes unfold so that it includes as-built information for the ensuing construction and maintenance tasks. This research introduces an interactive closed-loop digital twin framework that integrates a BIM into human-robot collaborative construction workflows. The robot's functions are primarily driven by the BIM, but it adaptively adjusts its plans based on actual site conditions, while the human co-worker oversees and supervises the process. When necessary, the human co-worker intervenes to help the robot overcome the encountered uncertainties. A drywall installation case study is conducted to verify the proposed workflow. In addition, experiments are carried out to evaluate the system performance using an industrial robotic arm in a research laboratory setting that mimics a construction site and in the Gazebo simulation. Integrating the flexibility of human workers and the autonomy and accuracy afforded by the BIM, the proposed framework offers significant promise of increasing the robustness of construction robots in the performance of field construction work.
Ultrafast Charge Separation Due to Excited State Symmetry Breaking in Dimers of Push‐Pull Perylenes (2004)

Abstract Photoexcitation of chromophoric dimers constrained to a symmetric π‐stacked geometry by their molecular structure usually produce excimers independent of solvent polarity, while dimers with edge‐to‐edge perpendicular π systems undergo excited‐state symmetry breaking in highly polar solvents leading to intradimer charge separation. We present direct evidence for symmetry breaking in the lowest excited singlet state of a symmetric cofacial dimer of 9‐( N ‐pyrrolidinyl)‐1,6‐bis(3,5‐di‐ tert ‐butylphenoxy)perylene‐3,4‐dicarboximide (5PMI) in the low‐polarity solvent toluene to produce a radical ion pair quantitatively. This dimer, cof ‐5PMI 2 , was synthesized by attaching two 5PMI chromophores via imide groups to a xanthene spacer. For comparison, a linear symmetric dimer, lin ‐5PMI 2 , was prepared in which the 5PMI chromophores are linked end‐to‐end via a N‐N single bond between their imides. The edge‐to‐edge π systems of the 5PMI chromophores within lin ‐5PMI 2 are perpendicular to one another. Ground‐state absorption spectra of both 5PMI dimers show exciton coupling, which is consistent with the orientation of the 5PMI chromophores relative to one another. Ultrafast transient absorption spectroscopy following excitation of the dimers with 400‐nm, 80‐fs laser pulses shows that quantitative intradimer electron transfer occurs in cof ‐5PMI 2 in toluene with τ = 0.9 ps, followed by charge recombination to ground state with τ = 780 ps. Similar measurements on lin ‐5PMI 2 reveal that photoinduced electron transfer does not occur in toluene, but occurs in more polar solvents such as 2‐methyltetra‐hydrofuran, wherein τ = 4.5 ps for charge separation and τ = 660 ps for charge recombination. Excited‐state symmetry breaking in 5PMI dimers provides new routes to biomimetic charge separation and storage assemblies that can be more easily prepared and modified than those based on multiple tetrapyrrole macrocycles.
Design of a 1 kW PFC power supply based on reduced redundant power processing principle (2006)

This paper presents a single phase power factor correction (PFC) power supply topology based on a non-cascading connection of a current-fed full-bridge converter and a buck-boost converter, both converters being operated in continuous conduction mode (CCM). Due to the reduced redundant processing of power, the non-cascading structure can inherently achieve a higher overall efficiency compared to the classical two-stage cascade structure. An analysis of the reduced redundant power processing (R <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> P <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ) principle is given and the associated practical problems discussed. Experimental results verify the effectiveness of the non-cascading structure of the proposed topology as an appropriate solution for increasing the overall efficiency.
Analysis and Implementation of a Novel Leading Zero Anticipation Algorithm for Floating-Point Arithmetic Units (2007)

Leading zero anticipation with error correction is a widely adopted technique in the implementation of high-speed IEEE-754-compliant floating-point units (FPUs), which are critical for area and power in multimedia-oriented systems-on-chips. We investigated a novel LZA algorithm allowing us to remove error correction circuitry by reducing the error rate below a commonly accepted limit for image processing applications, which is not achieved by previous techniques. We embedded our technique into a complete FPU definitely obtaining both area saving and overall FPU latency reduction with respect to traditional designs.
Primary Water Stress Corrosion Crack Morphology and Nondestructive Evaluation Reliability (2004)

A research program on primary stress corrosion crack (PWSCC) is being conducted by Pacific Northwest National Laboratory (PNNL). In this program, the material degradation problem in Alloys 600, 182, and 82 is being investigated with objectives that include compling a knowledge base on all cracking in nickel based materials at all degradation sites in nuclear power plants, assessing NDE methods using mockups to quantify the detection, sizing, and using mockups to quantify the detection sizing and characterization of tight cracks, and determining the role of welding processes in degradation. In this paper, the resuts of the initial literature searchs are presented. The relevant data on crack properties such as shape and orientation are presented and their impace on nondestructive evaluation (NDE) reliability is discussed.
3D printed 2D range modulators preserve radiation quality on a microdosimetric scale in proton and carbon ion beams (2023)

Radiation quality in terms of lineal energy was independent of the irradiation method. This supports the current approach in reference dosimetry, where the residual range is chosen as a beam quality index to select stopping power ratios.
Adaptive Paired-Comparison Method for Subjective Video Quality Assessment on Mobile Devices (2018)

To effectively evaluate subjective visual quality in weakly-controlled environments, we propose an Adaptive Paired Comparison method based on particle filtering. As our approach requires each sample to be rated only once, the test time compared to regular paired comparison can be reduced. The method works with non-experts and improves reliability compared to MOS and DS-MOS methods.
Comparative immunology of human and animal models of hookworm infection (2006)

Hookworm infection is a major cause of disease burden for animals and humans. Over the past years, the use of animal models in hookworm infections has been driven by the search of new anthelminthic therapies and, especially, vaccine development. These studies also contributed to the advance of knowledge on immunity to hookworms, offering new insights to understand the nature of this parasitic infection. In this article, we will summarize the essential features of the immune response in the two major animal models of hookworm infections (dog and hamster) and then consider its implication for the human immune response.
Inductive Substratum for Osteogenesis in Pellets of Particulate Bone Matrix (1968)

A Publication of The Association of Bone and Joint Surgeons® | CORR® Clinical Orthopaedics and Related Research is a leading peer-reviewed orthopaedic journal and a publication of The Association of Bone and Joint Surgeons®. Learn more!
Activation of the p38 Mitogen-activated Protein Kinase Mediates the Suppressive Effects of Type I Interferons and Transforming Growth Factor-β on Normal Hematopoiesis (2002)

Type I interferons (IFNs) are potent regulators of normal hematopoiesis in vitro and in vivo, but the mechanisms by which they suppress hematopoietic progenitor cell growth and differentiation are not known. In the present study we provide evidence that IFN alpha and IFN beta induce phosphorylation of the p38 mitogen-activated protein (Map) kinase in CD34+-derived primitive human hematopoietic progenitors. Such type I IFN-inducible phosphorylation of p38 results in activation of the catalytic domain of the kinase and sequential activation of the MAPK-activated protein kinase-2 (MapKapK-2 kinase), indicating the existence of a signaling cascade, activated downstream of p38 in hematopoietic progenitors. Our data indicate that activation of this signaling cascade by the type I IFN receptor is essential for the generation of the suppressive effects of type I IFNs on normal hematopoiesis. This is shown by studies demonstrating that pharmacological inhibitors of p38 reverse the growth inhibitory effects of IFN alpha and IFN beta on myeloid (colony-forming granulocytic-macrophage) and erythroid (burst-forming unit-erythroid) progenitor colony formation. In a similar manner, transforming growth factor beta, which also exhibits inhibitory effects on normal hematopoiesis, activates p38 and MapKapK-2 in human hematopoietic progenitors, whereas pharmacological inhibitors of p38 reverse its suppressive activities on both myeloid and erythroid colony formation. In further studies, we demonstrate that the primary mechanism by which the p38 Map kinase pathway mediates hematopoietic suppression is regulation of cell cycle progression and is unrelated to induction of apoptosis. Altogether, these findings establish that the p38 Map kinase pathway is a common effector for type I IFN and transforming growth factor beta signaling in human hematopoietic progenitors and plays a critical role in the induction of the suppressive effects of these cytokines on normal hematopoiesis.
Electronic Single Station Irrigation Timer/Controller (1984)

Automation is being used increasingly to improve farm water application efficiency and to reduce labor requirements. For many years, farmers have wanted and needed time-controlled devices and structures to change their irrigation sets automatically, particularly when it is inconvenient for them to make the change, such as at night. Such equipment has not been available commercially.
Studies of Adiponitrile as an Electrochemical Solvent (2014)

The usefulness of adiponitrile (ADN) as a solvent for electrochemical studies has been investigated using several solutes. In the present work, tetraethylammonium tetrafluorborate ( TEA BF 4 ) has been used as supporting electrolyte. Ferrocene undergoes reversible redox behavior in ADN/TEABF 4 , and the peak potential separation decreases markedly with increasing TEABF 4 concentration. The ketone 9-fluorenone undergoes two successive one-electron redox processes; however, the second process is not completely reversible at 100 mV/s in ADN. This behavior can be explained by the effect of a proton transfer between the fluorenone dianion and ADN. This proton transfer is not as extensive in acetonitrile, suggesting that intramolecular interactions in the ADN anion enhance the acidity of ADN.