gebhart/patrepeval huggingface dataset:
Learning VOR-like stabilization reflexes in robots. (2000)

We present a binocular robot that learns compensatory camera movements for image stabilization purposes. Most essential in achieving satisfactory image stabilization performance is the exploitation/integration of different self-motion information. In our robot, self-motion is measured inertially through an artificial vestibular apparatus and visually using basic motion detection algorithms. The first sensory system codes rotations and translations of the robot&apos;s head, the second, the shift of the visual world across the image plane. An adaptive neural network learns to map these sensory signals to motor commands, transforming non homogeneous self-motion information into compensatory camera movements. We describe the network architecture, the convergence of the learning scheme and the performance of the stabilization reflex evaluated quantitatively by means of direct measurements on the image plane. 1. Introduction When moving through the environment it is of paramount imp...
Pesticide Spraying in Indian River Grapefruit: III. Opportunities for Improving Efficacy and Efficiency while Reducing Off-target Deposition (2004)

Parts I and II of this series revealed substantial opportunities for improving spraying of Indian River citrus ( Citrus spp.). In this segment of our work we develop guidelines for growers to select the spray parameters providing an optimal balance between efficiency and efficacy while minimizing environmental contamination. It is proposed that these guidelines could be codified in a simple expert system to make them easier to use. We propose that understanding limiting conditions may be the key to choosing spray options. Wind is a major factor influencing spray deposition and offtarget drift. Based on weather records, wind speeds below 5 mph (8.0 km·h -1 ) are only routinely observed from 2000 HR until 0800 HR, making night spraying a good choice for low-volume applications. The importance of adjusting sprayer set-up for individual groves is demonstrated, with economic estimates of the cost of failing to make these adjustments. Routine use of careful sprayer adjustments is also likely to reduce off-target drift. Improvements in equipment and spray chemicals are also discussed. Use of non-orchard buffer areas and/or windbreaks appear to offer considerable opportunity for reducing off-site spray movement.
Spartina anglica as a Carbon Source for Salt-Marsh Invertebrates: A Study Using δ 13 C Values (1986)

Relative and absolute assimilation rates in macro-invertebrates on a salt-marsh in east England, dominated by Spartina anglica, were calculated for 1979 and 1980, using a combination of 513C values and faecal analyses. Total assimilation of S. anglica was around 40-45 g C m-2, which represents up to 20% of annual net primary shoot production (ANPPs). Of this, Nereis diversicolor accounted for >85% of the collective S. anglica assimilated by all macro-invertebrates. Fauna associated with the vegetation canopy assimilated only 0.5 g C m-2 (or < 0.3% of ANPPs). Analysis of bt3C values appears to offer a relatively simple means of investigating sources of carbon assimilated. Nevertheless, the limitations of the method are discussed.
Privacy-Preserving String Comparisons in Record Linkage Systems: A Review (2008)

ABSTRACT We face a growing need to be able to perform linkage among data set records to connect data about the same individual, organization or event so that further analysis becomes possible. At the same time, we also need to do a better job of protecting the privacy of the individuals identified by data set records. Therefore, it would be ideal if linkage could be effectively performed based not on the actual data but on some anonymous form of the data without diminishing the ability to link records whose identifiers are only “close” to each other, not equal, because of typical recording errors. This paper reviews existing proposals for how such anonymized string comparisons might be accomplished, but demonstrates that existing methods have various operational deficiencies. It therefore argues that new, more capable methods are needed.
Il baco del tempo ... ovvero ... dalla parte dell'utente (2017)

Viene analizzato il problema della scelta di un prodotto industriale in funzione della sua durata e la sua affidabilità.
ChemInform Abstract: ON THE CORRELATION BETWEEN BOND LENGTHS, CHEMICAL SHIFTS, AND CONE ANGLES IN OCTAHEDRAL COBALOXIMES CONTAINING PHOSPHORUS‐DONOR LIGANDS. CRYSTAL STRUCTURE OF TRANS‐CHLOROBIS(DIMETHYLGLYOXIMATO)(PHOSPHITE)COBALT(III) COMPLEXES WITH PHOSPHITE = DIMETHYOXYPHENYLPHOSPHINE AND METHOXYDIPHENYLPHOSPHINE (1982)

Abstract Der Titelkomplex mit P(O‐Me)2Ph kristallisiert in der Raumgruppe I4, /a mit Z".
Actin Disorganization Plays a Vital Role in Impaired Embryonic Development of In Vitro-Produced Mouse Preimplantation Embryos (2015)

Assisted reproductive technology (ART) is being increasingly applied to overcome infertility. However, the in vitro production process, the main procedure of ART, can lead to aberrant embryonic development and health-related problems in offspring. Understanding the mechanisms underlying the ART-induced side effects is important to improve the ART process. In this study, we carried out comparative transcriptome profiling between in vivo- (IVO) and in vitro- produced (IVP) mouse blastocysts. Our results suggested that aberrant actin organization might be a major factor contributing to the impaired development of IVP embryos. To test this, we examined the effect of actin disorganization on the development of IVP preimplantation embryos. Specific disruption of actin organization by cytochalasin B (CB) indicated that well-organized actin is essential for in vitro embryonic development. Supplementing the culture medium with 10(-9) M melatonin, a cytoskeletal modulator in adult somatic cells, significantly reversed the disrupted expression patterns of genes related to actin organization, including Arhgef2, Bcl2, Coro2b, Flnc, and Palld. Immunofluorescence analysis showed that melatonin treatment of IVP embryos significantly improved the distribution and organization of actin filaments (F-actin) from the 8-cell stage onwards. More importantly, we found that melatonin alleviated the CB-mediated aberrant F-actin distribution and organization and rescued CB-induced impaired embryonic development. This is the first study to indicate that actin disorganization is implicated in impaired development of IVP embryos during the preimplantation stage. We also demonstrated that improving actin organization is a promising strategy to optimize existing IVP systems.
Insights into the mechanism of diffusion of some N,N-dialkylanilines in "native" low density polyethylene films using a simple fluorescence technique (1994)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInsights into the mechanism of diffusion of some N,N-dialkylanilines in "native" low density polyethylene films using a simple fluorescence techniqueLiangde Lu and Richard G. WeissCite this: Macromolecules 1994, 27, 1, 219–225Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published inissue 1 January 1994https://pubs.acs.org/doi/10.1021/ma00079a033https://doi.org/10.1021/ma00079a033research-articleACS PublicationsRequest reuse permissionsArticle Views61Altmetric-Citations38LEARN 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
Prüfanlagen mit Mehrfachprüfköpfen (2000)

A most common method of automated inspection of steel tubes uses multi-element immersion probes, which are capable of scanning a large surface area, while the tube is moved along a water filled test chamber in a helical motion. However, the sound field of a conventional multi-element probe lacks uniformity: In the scan region between adjacent elements, a steep sensitivity drop occurs with the risk of flaws remaining undetected. A new type of multi-element probes with overlapping beam profiles and entirely uniform sensitivity along its scan axis is presented in this paper. Overlapping of adjacent elements is achieved by means of a miniature electronic circuit, which is integrated in the probe housing. As a result of the uniform sound field, the pitch of the scan helix and, consequently, the through-put can be considerably increased. Already installed conventional multi-element probes can simply be replaced by the new ones, since no additional modification of the existing ultrasonic equipment is necessary.
The influence of temperature on the impact behavior of unidirectional glass fiber‐epoxy composite (1986)

Abstract The influence of temperature on the impact behavior of unidirectional glass fiber‐epoxy composite was studied in the range of −20 and 150°C using a 3‐point drop weight test at a constant impact velocity of 2.2 m/s (5 mph). The impact energy per unit deformed volume was found to be very sensitive to the ratio length/thickness of the specimens. When the ratio was 4, the impacted specimens exhibited extensive delamination (shear failure) and the energy absorbed by the composite was about 14 MJ/m 3 between −20 and 100°C, and 18 MJ/m 3 at 150°C. At length/thickness above 16 the failure was mostly in tension, and the impact energy approached a constant value of about 3.5 MJ/m 3 , independent of temperature.
Phospho<i>enol</i>pyruvate‐dependent phosphorylation site in enzyme III<sup>glc</sup> of the <i>Escherichia coli</i> phosphotransferase system (1984)

Enzyme-IIIglc is part of the glucose phosphotransferase system of Escherichia coli and Salmonella typhimurium and is phosphorylated by phosphoenolpyruvate in a reaction requiring enzyme I (phosphoenolpyruvate-protein phosphotransferase), and the histidine-containing phospho-carrier protein HPr. In this paper we report the isolation of IIIglc from E. coli and the characterization of the active center. Alkaline hydrolysis of [32P]P-IIIglc and chromatography of the hydrolysate suggested that the phosphoryl group is bound to a histidyl residue in P-IIIglc of S. typhimurium. Here we present 1H-NMR measurements of IIIglc and P-IIIglc from E. coli which further substantiate that the phosphoryl group in P-IIIglc is linked to the N-3 position of a histidyl residue. After phosphorylation of IIIglc with [32P]Phosphoenolpyruvate, enzyme I and HPr, the phosphorylated protein was cleaved with either alkaline protease from Streptomyces griseus or subtilisin from Bacillus subtilis. According to amino acid analysis both proteases produced the same peptide carrying the phosphoryl group. The amino acid sequence of this peptide was found to be Val-His-Phe-Gly-Ile-Asp. The lower electrophoretic mobility of P-IIIglc on dodecylsulfate/polyacrylamide gels and its stronger binding to the hydrophobic matrix of a reversed-phase column compared to unphosphorylated protein may indicate a structural change following phosphoenolpyruvate-dependent phosphorylation.
17β-Estradiol Protects against Oxidative Stress-induced Cell Death through the Glutathione/Glutaredoxin-dependent Redox Regulation of Akt in Myocardiac H9c2 Cells (2006)

The GSH/glutaredoxin (GRX) system is involved in the redox regulation of certain enzyme activities, and this system protects cells from H2O2-induced apoptosis by regulating the redox state of Akt (Murata, H., Ihara, Y., Nakamura, H., Yodoi, J., Sumikawa, K., and Kondo, T. (2003) J. Biol. Chem. 278, 50226-50233). Estrogens, such as 17beta-estradiol (E2), play an important role in development, growth, and differentiation and appear to have protective effects on oxidative stress mediated by estrogen receptor alpha (ERalpha). However, the role of the ERbeta-mediated pathway in this cytoprotection and the involvement of E2 in the redox regulation are not well understood. In the present study, we demonstrated that E2 protected cardiac H9c2 cells, expressing ERbeta from H2O2-induced apoptosis concomitant with an increase in the activity of Akt. E2 induced the expression of glutaredoxin (GRX) as well as gamma-glutamylcysteine synthetase, a rate-limiting enzyme for the synthesis of GSH. Inhibitors for both gamma-glutamylcysteine synthetase and GRX and ICI182,780, a specific inhibitor of ERs, abolished the protective effect of E2 on cell survival as well as the activity of Akt, suggesting that ERbeta is involved in the cytoprotection and redox regulation by E2. Transcription of the GRX gene was enhanced by E2. The promoter activity of GRX was up-regulated by an ERbeta-dependent element. These results suggest that the GRX/GSH system is involved in the cytoprotective and genomic effects of E2 on the redox state of Akt, a pathway that is mediated, at least in part, by ERbeta. This mechanism may also play an antiapoptotic role in cancer cells during carcinogenesis or chemotherapy.
Integral indicator for monitoring the condition of lubricating materials in tribocouples (2008)

A miniature integral detector is presented that enables in-line monitoring of the lubricating material in trybosystems by measuring and evaluating four diagnostic parameters simultaneously: chemical disintegration, total contamination content in the oil, water content, and temperature. The detector comprises a self-test system, self-tuning controlled by a microcontroller. The diagnostic parameters of the detector and the standard parameters, such as viscosity and general acid number of mineral and synthetic oils, are compared for their analysis. The validity of the detector’s output data is confirmed, which assures its broad application for in-line assessment of the performance of the oil and condition of the tribosystem in general given the high information content and the level of computerization.
An animal model of trachoma II. The importance of repeated reinfection. (1982)

An animal model of chronic cicatrizing trachoma has been produced by repeated ocular inoculation with Chlamydia trachomatis serotype E, a genitally transmitted strain. We have now produced a chronic follicular conjunctivitis on cynomolgus monkeys by repeated inoculation with C. trachomatis serotype A, which has been isolated from an area of endemic trachoma. This disease was similar in all respects to that which followed infection with the serotype E strain. Cynomolgus monkeys inoculated with a single dose of serotype E of C. trachomatis strain developed an acute, self-limited follicular conjunctivitis, which was intense for 4 weeks and then slowly subsided. The organism could be reisolated only during the first 4 weeks after inoculation. On reinoculation at 15 and 30 weeks after the initial infections, these animals demonstrated only a mild and transitory clinical response, and the agent could be recovered for only up to 14 days after inoculation. In contrast, repeated weekly reinoculation with either serotype led to a chronic progressive clinical response in these animals, although after the first 6 weeks the agent was isolated only occasionally. This chronic disease was shown not to be due to hypersensitivity to the egg yolk components in which the organism was grown. These data suggest that the serotype of the chlamydial organism may not be as important in determining the clinical course of disease as is the frequency or persistence of exposure to the chlamydial agent. Although a single inoculum produced an acute follicular conjunctivitis, repeated inoculation is needed to produce the chronic disease characteristic of trachoma in this animal model.
Functional modulation of the metastatic suppressor Nm23-H1 by oncogenic viruses (2011)

Evidence over the last two decades from a number of disciplines has solidified some fundamental concepts in metastasis, a major contributor to cancer associated deaths. However, significant advances have been made in controlling this critical cellular process by focusing on targeted therapy. A key set of factors associated with this invasive phenotype is the nm23 family of over twenty metastasis-associated genes. Among the eight known isoforms, Nm23-H1 is the most studied potential anti-metastatic factor associated with human cancers. Importantly, a growing body of work has clearly suggested a critical role for Nm23-H1 in limiting tumor cell motility and progression induced by several tumor viruses, including Epstein-Barr virus (EBV), Kaposi's sarcoma associated herpes virus (KSHV) and human papilloma virus (HPV). A more in depth understanding of the interactions between tumor viruses encoded antigens and Nm23-H1 will facilitate the elucidation of underlying mechanism(s) which contribute to virus-associated cancers. Here, we review recent studies to explore the molecular links between human oncogenic viruses and progression of metastasis, in particular the deregulation of Nm23-H1 mediated suppression.
Advanced multi chip module solutions for RF and digital space applications: status and perspective (2005)

The evolution of space modules and equipment hardware is strictly related to the progress of enabling technologies in terms of available high reliable processes and devices, advanced interconnection and packaging techniques and high repeatability production systems. The evolution towards highly integrated microwave and digital hybrids implies an integrate study of electrical, thermal and mechanical properties and proper power dissipation and thermal management techniques. The paper will go through the last solutions conceived and applied by Alenia Spazio in its broad product portfolio for telecommunication, radar and scientific space electronics application.
Modification of energy relaxation of InGaAs quantum dots by postgrowth thermal annealing (2002)

Energy relaxation channels of carriers in InGaAs quantum dots (QDs) by multiphonon processes are observed to be changed upon post growth annealing. Self-organized InGaAs QDs in GaAs grown by MOCVD using the Stranski Krastanow (SK) growth mode were systematically thermally treated. The samples were investigated using photoluminescence (PL) and selectively excited photoluminescence (SPL). Upon annealing, the energy states shift towards higher energies, the inhomogeneous broadening is reduced and the phonon energy is changed drastically. It is shown that the changes of the phonon energy are not alone caused by a variation of the In content and the size of the QDs. The Interface phonons is proposed to be the main reason for the changes of the phonon energy.
New Talents for an Old Acquaintance: the SR Protein Splicing Factor ASF/SF2 Functions in the Maintenance of Genome Stability (2005)

ASF/SF2 is a well-studied SR protein that plays important roles in premRNA splicing and other aspects of RNA metabolism. Genetic inactivation experiments have revealed the fundamental roles of ASF/SF2 and other SR proteins in cell viability and animal development. However, the nature of the events triggered by in vivo depletion of ASF/SF2 remained largely elusive. Recently, we have demonstrated a significant function of ASF/SF2 in the maintenance of genome stability by preventing the formation of R loops, which provided new insights into the essential roles of ASF/SF2 in cellular physiology.
Hard x-ray emission from intense short pulse laser plasmas (1995)

Hard x-ray emission in the range of 100 keV has been measured from plasmas produced by irradiation of solid targets with ps laser pulses up to 7×1017 W/cm2. The experimental data obtained for oblique incidence of p-polarized laser light at different illumination angles are compared to computer calculations, which include the processes of resonance absorption and vacuum heating. The scaling of hard x-ray emission with varying laser flux is consistent with the theoretical model of bremsstrahlung emission of hot electrons. From this, together with an absolute radiation dose measured with calibrated detectors, a transfer of up to 50% of the incident laser energy to suprathermal (∼10...100 keV) electrons is estimated.
A Study of the Structural, Mechanical and Tribological Properties of Ti-Al-N Coatings Post-Treated by Carbon Implantation (2009)

Carbon ion implantation has often been considered as an additional method to further improve the wear, corrosion and oxidation resistance of hard coatings on tools or machine parts. The present research investigates the effect of carbon implantation on the structural and mechanical properties of the sputter-deposited solid solution Ti-Al-N coatings. The carbon implantation was carried out by using metal vapour vacuum arc ion source (MEVVA) with solid cathode at energies of 5 and 50 keV, and a dose of 6×1017 atoms cm-2. The mechanical and the microstructure properties of the implanted layer were identified by a variety of analytic techniques, such as nano-indentation, x-ray photoelectron spectroscopy (XPS) and x-ray diffraction (XRD) etc. Additionally, the wear performance of the samples was evaluated by a typical ball-on-disk tribometer in dry conditions. The results showed that the coatings with high energy carbon implantation exhibited an enhanced hardness. The improved hardness could be attributed to the formation of TiC phase, as indicated in XPS. In the sliding tests, the coatings with the post-treatment of carbon implantation showed an improved tribological property in terms of friction coefficient and wear rate. The friction coefficient could be reduced from 0.6 to 0.1. The coatings had ten-fold better wear resistance than the coating without ion implantation.
A client-server architecture for state-dependent dynamic visualizations on the web (2010)

As sophisticated enterprise applications move to the Web, some advanced user experiences become difficult to migrate due to prohibitively high computation, memory, and bandwidth requirements. State-dependent visualizations of large-scale data sets are particularly difficult since a change in the client's context necessitates a change in the displayed results. This paper describes a Web architecture where clients are served a session-specific image of the data, with this image divided into tiles dynamically generated by the server. This set of tiles is supplemented with a corpus of metadata describing the immediate vicinity of interest; additional metadata is delivered as needed in a progressive fashion in support and anticipation of the user's actions. We discuss how the design of this architecture was motivated by the goal of delivering a highly responsive user experience. As an example of a complete application built upon this architecture, we present OrgMaps, an interactive system for navigating hierarchical data, enabling fluid, low-latency navigation of trees of hundreds of thousands of nodes on standard Web browsers using only HTML and JavaScript.