gebhart/patrepeval huggingface dataset:
Head-eyes system and gaze analysis of the humanoid robot Romeo (2014)

In this work we present the head assembly and the gaze shifting capabilities of the bipedal humanoid robot Romeo. The purpose of the head system is to provide a reliable hardware platform for Human-Robot Interaction (HRI) applications, stereo vision based navigation or gazing experiments, either as stand-alone version or in synergy with the body movements. Towards this purpose, the number of joints, the angular range, speed and acceleration of the eyes and neck rotations should be should be in agreement with human psychophysics, i.e. reproducing realistic kinematics. We present a mechatronic system of the head and neck; accompanied by experimental results of head-fixed eye movements, solely head rotations, as well as eye-head cooperative motion for large angles of gaze shifting. We compare the values achieved by the prototype, with those of an average adult human.
Towards Three and Four Dimensional Data Collection for Electrical Resistivity Data (2004)

PreviousNext No AccessSymposium on the Application of Geophysics to Engineering and Environmental Problems 2004Towards Three and Four Dimensional Data Collection for Electrical Resistivity DataAuthors: Douglas LaBrecqueRoger SharpeMelissa StubbenDouglas LaBrecqueMulti‐Phase Technologies, LLC, Sparks, NV, Roger SharpeMulti‐Phase Technologies, LLC, Sparks, NV, and Melissa StubbenMulti‐Phase Technologies, LLC, Sparks, NVhttps://doi.org/10.4133/1.2923377 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Introductory paragraph for this paper is available only in the PDF and GZipped PS filesPermalink: https://doi.org/10.4133/1.2923377FiguresReferencesRelatedDetailsCited By4D cross-borehole electrical resistivity tomography to control resin injection for ground stabilization: a case history in Venice (Italy)1 October 2012 | Near Surface Geophysics, Vol. 11, No. 1 Symposium on the Application of Geophysics to Engineering and Environmental Problems 2004ISSN (online):1554-8015Copyright: 2004 Pages: 1823 publication data© 2004 Copyright © 2004 The Environmental and Engineering Geophysical SocietyPublisher:Environmental & Engineering Geophysical Society HistoryPublished: 30 Sep 2008 CITATION INFORMATION Douglas LaBrecque, Roger Sharpe, and Melissa Stubben, (2004), "Towards Three and Four Dimensional Data Collection for Electrical Resistivity Data," Symposium on the Application of Geophysics to Engineering and Environmental Problems Proceedings : 625-632. https://doi.org/10.4133/1.2923377 Plain-Language Summary PDF DownloadLoading ...
A Hydrophobic Domain in the Large Envelope Protein Is Essential for Fusion of Duck Hepatitis B Virus at the Late Endosome (2005)

The duck hepatitis B virus (DHBV) envelope is comprised of two transmembrane (TM) proteins, the large (L) and the small (S), that assemble into virions and subviral particles. Secondary-structure predictions indicate that L and S have three alpha-helical, membrane-spanning domains, with TM1 predicted to act as the fusion peptide following endocytosis of DHBV into the hepatocyte. We used bafilomycin A1 during infection of primary duck hepatocytes to show that DHBV must be trafficked from the early to the late endosome for fusion to occur. Alanine substitution mutations in TM1 of L and S, which lowered TM1 hydrophobicity, were used to examine the role of TM1 in infectivity. The high hydrophobicity of the TM1 domain of L, but not of S, was shown to be essential for virus infection at a step downstream of receptor binding and virus internalization. Using wild-type and mutant synthetic peptides, we demonstrate that the hydrophobicity of this domain is required for the aggregation and the lipid mixing of phospholipid vesicles, supporting the role of TM1 as the fusion peptide. While lipid mixing occurred at pH 7, the kinetics of insertion of the fusion peptide was increased at pH 5, consistent with the location of DHBV in the late-endosome compartment and previous studies of the nonessential role of low pH for infectivity. Exchange of the TM1 of DHBV with that of hepatitis B virus yielded functional, infectious DHBV particles, suggesting that TM1 of all of the hepadnaviruses act similarly in the fusion mechanism.
Impacts of atmospheric ultrafast Kelvin waves on radio scintillations in the equatorial ionosphere (2013)

We present a statistical analysis of the amplitudes of GPS scintillations (S4 index) observed throughout 2008–2010 using the satellite radio occultation measurements of the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC). Here, for the first time, periodic variability in the occurrence of S4 is investigated using these data. Significant variations of S4 with periods of 2.5–4 days (quasi‐3 days) are identified from the observations during postsunset hours (1900–2400 local time) between 15°S– 15°N magnetic latitude during this 3 year interval. Coherence analyses of these variations with the geomagnetic Ap index, solar EUV irradiance, and atmospheric wind measurements from an equatorial mesosphere meteor radar at Thumba, India ( 8.5°N, 77°E) are performed, providing a measure of the relationship between variations in the scintillations and potential drivers. The quasi‐3 day variations in S4 are found to covary with the variations of the three drivers examined. In particular, the S4 signatures are found to be coherent with the atmospheric ultrafast Kelvin (UFK) planetary waves characterized by the zonal wind measurements of the radar. This study shows that these UFK waves are as important as the solar and geomagnetic drivers in forcing the day‐to‐day variations of the occurrence of equatorial spread F .
Prediction of superplastic forming of 7475 aluminium alloy sheets (2019)

Abstract Superplastic forming is mainly used in the aeronautic and astronautic domains and to fabricate the complex shape parts with the materials hard to process. The numerical simulation is used to predict the superplastic forming process due to the difficulty to predict a forming pressure by a traditional trial and error method. In the article, the superplastic behaviour of a 7475 aluminium alloy has been investigated. Uniaxial tensile tests over a wide range of temperatures and strain rates have been performed. An Arrhenius-type model using strain compensation has been identified. A failure criterion based on the evolution of fracture work is also proposed. This material model has been implemented by user subroutine in numerical simulations (ABAQUS) to predict the ability of the material to form a complex revolution part by superplastic forming. A pressure control algorithm has been developed to minimize the pressure instability and decrease the simulation CPU time. The numerical results, in terms of thickness evolution in the formed component and location of damage-risk zones, have finally been compared to experimental results after the realization of some bulging experiments using the generated pressure cycle.
Proteome Profiling—Pitfalls and Progress (2000)

In this review we examine the current state of analytical methods in proteomics. The conventional methodology using two-dimensional electrophoresis gels and mass spectrometry is discussed, with particular reference to the advantages and shortcomings thereof. Two recently published methods which offer an alternative approach are presented and discussed, with emphasis on how they can provide information not available via two-dimensional gel electrophoresis. These two methods are the isotope-coded affinity tags approach of Gygi et al . and the two-dimensional liquid chromatography–tandem mass spectrometry approach as presented by Link et al . We conclude that both of these new techniques represent significant advances in analytical methodology for proteome analysis. Furthermore, we believe that in the future biological research will continue to be enhanced by the continuation of such developments in proteomic analytical technology.
Modeling of a new 2D Acceleration Sensor Array using SystemC-AMS (2006)

This paper presents an approach for modeling and simulation of a new 2D acceleration sensor array using SystemC-AMS. The sensor array consists of six single acceleration sensors with different detection axes. These single sensors comprise of four capacitive segments and one mass segment, aligned in a semicircle. The redundant sensor information is used for offset correction.
Charge Transport and Electrical Properties of Spin Crossover Materials: Towards Nanoelectronic and Spintronic Devices (2016)

In this paper, we present a comprehensive review of research on electrical and charge transport properties of spin crossover complexes. This includes both the effect of spin-state switching on the dielectric permittivity and electrical conductivity of the material and vice versa the influence of an applied electrical field (or current) on the spin-state of the system. The survey covers different size scales from bulk materials and thin films to nanoparticles and single molecules and embraces the presentation of several device prototypes and hybrid materials as well.
Analytical Aspects of Reactions of 2-(2-Pyridyl)-benzimidazole and 2-(2-Pyridyl)-imidazoline with Iron(II) (1954)

The compounds, 2(2-pyridyl)-benzimidazole and2(2-pyridyl)-imidazoline, of interest because of their structural similarity to 2,2',-bipyridine and o-phenanthroline, were prepared and their reactions with metal cations tested. Both were found to give color reactions with copper(I), copper(II), cobalt(II), iron(ll), and iron(III). Most notable were those with iron(II), with which deep red-purple colored complexes were formed. These complexes were studied spectrophotometrically and found to have maximum absorbances at 490 mμ for 2-(2-pyridyl)-benzimidazole at pH 5.7 and 560 mμ for 2-(2-pyridyI)-imidazoline at pH 9.0. The molar extinction coefficients for the 2-(2-pyridyl)-benzimidazoIe and 2-(2-pyridyl)-imidazoline are 3800, and 7800, respectively. Finally, the iron complexes could also be extracted with isoamyl alcohol, thus increasing the sensitivity of the color reaction.
The Application of NMR Spectroscopy to Functional Glycomics (2009)

Glycomics which is the study of saccharides and genes responsible for their formation requires the continuous development of rapid and sensitive methods for the identification of glycan structures. It involves glycoanalysis which relies upon the development of methods for determining the structure and interactions of carbohydrates. For the application of functional glycomics to microbial virulence, carbohydrates and their associated metabolic and carbohydrate processing enzymes and respective genes can be identified and exploited as targets for drug discovery, glyco-engineering, vaccine design, and detection and diagnosis of diseases. Glycomics also encompasses the detailed understanding of carbohydrate-protein interactions and this knowledge can be applied to research efforts focused toward the development of vaccines and immunological therapies to alleviate infectious diseases.
Failure mechanisms in stereolithography injection molding tooling (2000)

Abstract Stereolithography tooling is a form of rapid tooling that has been used to injection mold limited runs of prototype parts. However, the process is not well understood and tooling life for fine mold features is difficult to predict. Injection molding processing conditions and feature geometry affect the number of parts that can be made before a mold fails. To study the effects of feature geometry, general purpose polystyrene parts were injection molded in molds made of DSM Somos 7110 stereolithography resin. The ACES build style was used, and no polishing was performed on the mold. The experimental results were compared with theoretical models developed for the two failure mechanisms for raised features in a stereolithography mold—failures during injection due to the flow pressure of the injected polymer; and failures during ejection, whereby the part pulled out a feature of the mold. Injection failures occurred in taller mold features due to the force of flow and the feature's geometry. Ejection failures occurred in the shorter features when the stress from the ejection force (distributed over the bond area) exceeded the yield strength of the mold material. Models were developed to predict the number of parts that a mold could make before mold features break off and were validated through experimental results.
Effect of hemorrhagic shock on endotoxin-induced pulmonary hypertension and increased vascular permeability in unanesthetized sheep. (1984)

The lung is very susceptible to sepsis or endotoxin injury in the trauma patient. We studied the effect of an episode of hemorrhagic shock and resuscitation on the prostaglandin-induced pulmonary hypertension and leukocyte-induced increased permeability phase of endotoxin lung injury. Eight unanesthetized sheep with chronic lung lymph fistula were bled 50% of blood volume for 2 hr, then resuscitated. Thromboxane, TxA2, levels increased from 0.1 to 0.6 ng/ml during shock, while blood white cell count decreased. Both parameters returned to baseline while lung lymph flow increased twofold during resuscitation with lymph being protein-poor, indicating no increase in permeability. Lung water was not increased but some pulmonary leukostasis was evident histologically after resuscitation. We then studied the effect of this process on all immediate endotoxin insult. Seven unanesthetized sheep were given 0.7 microgram/kg E. coli endotoxin alone, and again after shock and resuscitation, in paired studies performed 3 days apart. There was no difference in either the early pulmonary hypertension or the later increased permeability phase of endotoxin lung injury when comparing the paired studies, as measured by lymph flow and protein flux. Hemorrhagic shock, despite producing a transient increase in thromboxane and pulmonary leukocyte sequestration, does not accentuate the lung injury of endotoxin if the shock state is adequately resuscitated.
Optimal optical power for DPASK over a nonlinear fiber-optic channel (2005)

We present a method for optimizing the launch power to minimize the error probabilities, when using differential-phase amplitude shift keying modulation over nonlinear fiber-optic transmission systems. Multicanonical Monte-Carlo simulations validate the theoretical analysis.
Systematic Knowledge Auditing: A Case Study in a Power Utility Company (2007)

Managing knowledge of plant maintenance in a power utility company is vital to the provision of a safe and reliable electricity supply to two million domestic and commercial customers. The business is built on a lot of expertise, techniques and experience of all of its employees from engineering, maintenance, safety and environmental control, to quality assurance. Knowledge auditing is usually carried out as the first critical step in the implementation of any Knowledge Management programmes in power utility companies. Although various knowledge auditing approaches have been proposed by some researchers and practitioners, there is a lack of a systematic approach in the way it is conducted, and the audit practice varies with different industries and companies. This paper presents a systematic knowledge audit approach, which has been successfully trial-implemented in a power plant.
The allergen profile of beech and oak pollen (2008)

Summary Background Beech and oak pollen are potential allergen sources with a world‐wide distribution. Objective We aimed to characterize the allergen profile of beech and oak pollen and to study cross‐reactivities with birch and grass pollen allergens. Methods Sera from tree pollen‐allergic patients with evidence for beech and oak pollen sensitization from Basel, Switzerland, ( n =23) and sera from birch pollen‐allergic patients from Vienna, Austria, ( n =26) were compared in immunoblot experiments for IgE reactivity to birch ( Betula pendula syn. verrucosa ), beech ( Fagus sylvatica ) and oak ( Quercus alba ) pollen allergens. Subsequently, beech and oak pollen allergens were characterized by IgE inhibition experiments with purified recombinant and natural allergens and with allergen‐specific antibody probes. Birch‐, beech‐ and oak pollen‐specific IgE levels were determined by ELISA. Results Beech and oak pollen contain allergens that cross‐react with the birch pollen allergens Bet v 1, Bet v 2 and Bet v 4 and with the berberine bridge enzyme‐like allergen Phl p 4 from timothy grass pollen. Sera from Swiss and Austrian patients exhibited similar IgE reactivity profiles to birch, beech and oak pollen extracts. IgE levels to beech and oak pollen allergens were lower than those to birch pollen allergens. Conclusion IgE reactivity to beech pollen is mainly due to cross‐reactivity with birch pollen allergens, and a Phl p 4‐like molecule represented another predominant IgE‐reactive structure in oak pollen. The characterization of beech and oak pollen allergens and their cross‐reactivity is important for the diagnosis and treatment of beech and oak pollen allergy.
Identification of Endogenously Phosphorylated KSP Sites in the High‐Molecular‐Weight Rat Neurofilament Protein (1994)

The high-molecular-weight neurofilament protein (NF-H) is highly phosphorylated in vivo, with estimates as high as 16-51 mol of Pi/mol of protein. Most of the phosphorylation sites are thought to be located on Ser residues in multiple KSP repeats, in the carboxy-terminal tail region of the molecule. Because the extent and site-specific patterns of tail domain phosphorylation are believed to modulate neurofilament structure and function, it becomes essential to identify the endogenous sites of phosphorylation. In this study, we have used selective proteolytic cleavage procedures, Pi determinations, microsequencing, and mass-spectral analysis to determine the endogenously phosphorylated sites in the NF-H tail isolated from rat spinal cord. Twenty Ser residues in NF-H carboxy-terminal tail were analyzed; nine of these, all located in KSP repeats, were phosphorylated. No detectable phosphorylation could be identified in any of the 11 "non-KSP" Ser residues that were examined. KSPXKX, KSPXXX, and KSPXXK motifs were found to be phosphorylated. In addition, a 27-kDa KSP-rich domain, containing 43 virtually uninterrupted KSPXXX repeats, was isolated from the tail domain and found to contain between 30 and 35 mol of Pi/mol of protein. This domain appeared to be highly resistant to endoproteinase Glu-C digestion, although it contains a large number of glutamate residues. It could be proteolyzed, however, after dephosphorylation. This suggests that phosphorylation of the tail domain may contribute to neurofilament stability in vivo. A neuronal-derived protein kinase that specifically phosphorylates only KSPXKX motifs in neurofilaments has been reported. The presence of extensively phosphorylated KSPXXX repeats in NF-H in vivo suggests the existence of yet another, unidentified kinase(s) with specificity for KSPXXX motifs.
Influence of human fulminant hepatic failure sera on endogenous retroviral expression in pig hepatocytes (2000)

A porcine endogenous retrovirus (PERV) has been shown to infect human embryonic kidney 293 (HEK293) cells in vitro. The PERV proviral sequence exists in the genome of all porcine cells, including hepatocytes used in a bioartificial liver (BAL). We examined the possibility of PERV infection in HEK293 cells during exposure to supernatant from cultured pig hepatocytes. Pig hepatocytes were cultured in media supplemented with serum from patients in fulminant hepatic failure (FHF) to simulate conditions of an extracorporeal BAL. Pig hepatocytes were cultured in serum-free media for 24 hours and then exposed to fresh medium containing serum from a patient with FHF (22 patients tested). Twenty-four hours later, supernatant was collected and analyzed by polymerase chain reaction (PCR), with and without reverse transcriptase. Primers targeting the pol gene of PERV were used for PCR. Products of amplification were detected by an enzyme-linked immunosorbent assay-based technique using an internal capture probe also targeting the pol gene. Levels of PERV sequences were estimated by serial dilution. All positive samples were tested for infectivity in HEK293 cells. Porcine kidney 15 cell supernatant and fresh culture media were studied as positive and negative controls, respectively. Pig hepatocytes were also studied in the absence of FHF sera and in the presence of mitogenic stimulation with phytohemagglutinin (PHA) and phorbol 12-myristate-13-acetate (PMA). PERV DNA and PERV RNA were detected in all supernatants of cultured pig hepatocytes. The level of PERV RNA in the supernatant of pig hepatocytes was not altered by exposure to human FHF serum or stimulation with PHA and PMA. In addition, PERV RNA was undetectable in the supernatant of HEK293 cells for up to 50 days after exposure to pig hepatocyte supernatant (with or without FHF sera). These findings show that production of PERV by cultured pig hepatocytes was unaffected by exposure to growth factors and cytokines present in human FHF sera.
ChemInform Abstract: Xenicane Diterpenes Revisited: Thermal (E) → (Z) Isomerization and Conformational Motions. A Unifying Picture. (1994)

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.
Reduction of radiative heat transfer between two metallic plates due to interferences (2014)

International audience
Transcription of isolated mouse liver chromatin (1976)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTranscription of isolated mouse liver chromatinLee T. Bacheler and Kirby D. SmithCite this: Biochemistry 1976, 15, 15, 3281–3290Publication Date (Print):July 27, 1976Publication History Published online1 May 2002Published inissue 27 July 1976https://pubs.acs.org/doi/10.1021/bi00660a018https://doi.org/10.1021/bi00660a018research-articleACS PublicationsRequest reuse permissionsArticle Views24Altmetric-Citations17LEARN 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
CORRUGATED SURFACES FORMED ON <font>GaAs</font> (331)<font>A</font> SUBSTRATES: THE TEMPLATE FOR LATERALLY ORDERED <font>InGaAs</font> NANOWIRES (2006)

Morphology evolution of high-index (331) A surfaces during molecular beam epitaxy (MBE) growth have been investigated in order to uncover their unique physic properties and fabricate spatially ordered low dimensional nanostructures. Atomic Force Microscope (AFM) measurements have shown that the step height and terrace width of GaAs layers increase monotonically with increasing substrate temperature in conventional MBE. However, this situation is reversed in atomic hydrogen-assisted MBE, indicating that step bunching is partly suppressed. We attribute this to the reduced surface migration length of Ga adatoms with atomic hydrogen. By using the step arrays formed on GaAs (331) A surfaces as the templates, we fabricated laterally ordered InGaAs self-aligned nanowires.