gebhart/patrepeval huggingface dataset:
The global network of outdoor webcams (2009)

There are thousands of outdoor webcams which offer live images freely over the Internet. We report on methods for discovering and organizing this already existing and massively distributed global sensor, and argue that it provides an interesting alternative to satellite imagery for global-scale remote sensing applications. In particular, we characterize the live imaging capabilities that are freely available as of the summer of 2009 in terms of the spatial distribution of the cameras, their update rate, and characteristics of the scene in view. We offer algorithms that exploit the fact that webcams are typically static to simplify the tasks of inferring relevant environmental and weather variables directly from image data. Finally, we show that organizing and exploiting the large, ad-hoc, set of cameras attached to the web can dramatically increase the data available for studying particular problems in phenology.
Synthesis and characterization of branched polysaccharides by reaction of cellulose with 2,3,4,6-tetraacetyl-1-bromo-α-D-glucopyranoside (2012)

Non-naturally branched polysaccharides were prepared homogeneously by reaction of cellulose in N,N-dimethyl acetamide/LiCl and the ionic liquid 1-N-butyl-3-methylimidazolium chloride with 2,3,4,6-tetraacetyl-1-bromo--D-glucopyranoside in the presence of triethylamine as base. Degrees of substitution up to 0.58 were realized. The samples were soluble in dimethyl sulphoxide and water. NMR spectroscopy and methylation analysis revealed the formation of 1,2-orthoesters. The purity of the products regarding non-bonded sugar molecules was evidenced by advanced NMR techniques (DOSY-and T2 measurements). In contrast to the reaction in 1-N-butyl-3-methylimidazolium chloride, 1-N-ethyl-3methylimidazolium acetate acts not only as solvent but also as reagent and leads to the formation of cellulose acetate instead of the desired product.
Efficient and Verifiable Algorithm for Secure Outsourcing of Large-scale Linear Programming (2014)

Linear programming (LP) has been well studied in the scientific community for various engineering applications such as network flow problems, packet routing, portfolio optimization, and financial data management, etc. In this paper, we first utilize the sparse matrix to investigate secure outsourcing for large-scale LP systems, which is considered as a prohibitively expensive computation for the clients with resource-constraint devices. Besides, we propose a secure and practical scheme which is suitable for any LP problem (feasible, infeasible or unbounded) even in the fully malicious model. Compared with the state-of-the-art algorithm [30], our proposed algorithm only requires O(n <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ) computational overhead instead of O(n <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ρ</sup> ) for 2 <; ρ ≤ 3. Furthermore, the client C can detect the misbehavior of cloud server S with the (optimal) probability 1 under the computational complexity of O(n).
Large age-gap face verification by feature injection in deep networks (2016)

This paper introduces a new method for face verification across large age gaps and also a dataset containing variations of age in the wild, the Large Age-Gap (LAG) dataset, with images ranging from child/young to adult/old. The proposed method exploits a deep convolutional neural network (DCNN) pre-trained for the face recognition task on a large dataset and then fine-tuned for the large age-gap face verification task. Finetuning is performed in a Siamese architecture using a contrastive loss function. A feature injection layer is introduced to boost verification accuracy, showing the ability of the DCNN to learn a similarity metric leveraging external features. Experimental results on the LAG dataset show that our method is able to outperform the face verification solutions in the state of the art considered.
Component Tests of Huge Scale All-Steel Multi-Curve Buckling Restrained Braces (2012)

Many countries have gradually adopted the buckling-restrained brace (BRB) for preventing structural damage during earthquakes since its introduction in the 1970s. In this study, we propose an all-steel BRB called the multi-curve buckling-restrained brace (MC-BRB) to overcome the shortcomings of traditional BRBs that use mortar encased in a steel tube. This new BRB consists of double core plates, each with multiple neck portions that form multiple energy dissipation segments, enlarged segments, lateral support elements, and constraining elements that are designed to prevent the BRB from buckling. The enlarged segment located in the middle of the core plate can be connected to the lateral support and constraining elements to increase buckling strength and prevent the lateral support and constraining elements from sliding during earthquakes. The lateral support elements can be windowed to allow quality control checks to be performed and the condition of the core plate to be monitored after an earthquake. In this study, a huge-scale component test with an axial load of 14000 KN in the core plates was carried out to investigate the behavior of the new BRB and its capabilities for seismic mitigation. A comparison of the experimental results and theoretical calculations indicate that the all-steel MC-BRB possesses a stable and predictable mechanical behavior under cyclic loadings.
Shiga Toxin 2f-Producing <i>Escherichia albertii</i> from a Symptomatic Human (2014)

The previously identified Shiga toxin (Stx) 2f-producing Escherichia coli O115:HNM strain F08/101-31, isolated from a symptomatic human, was confirmed to be E. albertii in the present study by whole genome DNA-DNA hybridizations, by sequencing (cpn60, dnaJ, and 16S rRNA genes), and by multi-locus sequence typing. The F08/101-31 strain was originally identified as E. coli rather than the relatively new bacterial species E. albertii, which was first described in 2003, because it did not display any of the biochemical characteristics of E. albertii. This new classification will impact public health management strategies in Japan because the present study showed that some E. albertii strains, which are often misidentified as E. coli, produce Stx and likely cause diarrhea in humans. Therefore, further guidelines for the management and identification of Stx-producing E. albertii are required in Japan.
Efflux inhibition by selective serotonin reuptake inhibitors in Escherichia coli (2011)

A possible explanation for the discrepancy between the MIC and real-time efflux assays was that sertraline is a weak inducer of marA and acrB, thereby reducing its initial antibacterial and sensitizing effects over time. The results indicate that sertraline may be useful as a model efflux pump inhibitor for in vitro short-term experiments in E. coli, but is unlikely to be clinically useful as a co-drug against Gram-negative bacteria.
Four Monolithically Integrated Switched-Capacitor DC–DC Converters With Dynamic Capacitance Sharing in 65-nm CMOS (2017)

We present a network of <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">dynamic capacitance sharing</i> (DCS) switched-capacitor converters that increase the range of efficient voltage regulation for multiple independent loads while reducing area overhead. Since maximum power dissipation is fixed for a single chip due to thermal constraints, the proposed converters consider the overall power budget of multiple voltage-scalable loads to dynamically share energy storage area, allowing the dynamic allocation of energy storage clusters on-demand. Our DCS converters utilize a feedback control scheme including both capacitance and frequency modulation, which leads to the order of 10-100ns voltage settling times. A test chip with 16 clusters and four regulator control loops is fabricated in 65-nm bulk CMOS process. For a 2.3V input, our DCS converters achieve 0.742V at 38.1mA to 1.367V at 298mA output with peak efficiency of 70.9% at 550-mW/mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> power density. Regulator area for the four-load network is reduced by up to 70% when operating under a power constraint compared with the stand-alone per-load regulators capable of supporting an equivalent range of operating voltages.
Hemoglobin Receptor in Leishmania Is a Hexokinase Located in the Flagellar Pocket (2004)

Hb endocytosis in Leishmania is mediated through a 46-kDa protein located in the flagellar pocket. To understand the nature of the Hb receptor (HbR), we have purified the 46-kDa protein to homogeneity from Leishmania promastigote membrane. Purified HbR specifically binds Hb. The gene for HbR was cloned, and sequence analysis of the full-length HbR gene indicates the presence of hexokinase (HK) signature sequences, ATP-binding domain, and PTS-II motif. Four lines of evidence indicate that HbR in Leishmania is a hexokinase: 1) the recombinant HbR binds Hb, and the Hb-binding domain resides in the N terminus of the protein; 2) recombinant proteins and cell lysate prepared from HbR-overexpressing Leishmania promastigotes show enhanced HK activity in comparison with untransfected cells; 3) immunolocalization studies using antibodies against the N-terminal fragment (Ld-HbR-DeltaC) of Ld-HbR indicate that this protein is located in the flagellar pocket of Leishmania; and 4) binding and uptake of (125)I-Hb by Leishmania is significantly inhibited by anti-Ld-HbR-DeltaC antibody and Ld-HbR-DeltaC, respectively. Taken together, these results indicate that HK present in the flagellar pocket of Leishmania is involved in Hb endocytosis.
High-Current Lanthanum Hexaboride Hollow Cathode for High-Power Hall Thrusters (2014)

NASA is continuing to develop high-power Hall thrusters in the range of 20 to 100 kW for future cargo and manned missions. The cathodes for these thrusters will be required to produce discharge currents in the 50 to 300 A range with lifetimes in excess of 10 kh. A prototype high-current hollow cathode with a 2-cm-diam lanthanum hexaboride insert was previously developed for these applications. The original design featured a graphite cathode tube to interface with the insert and an insulated sheath heater capable of heating the higher temperature emitter to ignition temperatures. A new version of this cathode has been designed and built that uses a refractory metal cathode tube and features a robust design similar to the small cathode used for the H6 Hall thruster. The new cathode has been successfully tested at steady-state discharge currents from 25 to 300 A. This cathode is intended to be used in an 80 kW nested Hall thruster being built at the University of Michigan at discharge currents of over 250 A.
In vivo and in vitro evaluation of the alkylating agent carmethizole. (1991)

Carmethizole, a novel bis-carbamate alkylating agent, was evaluated in vitro for potential mechanisms of interaction with DNA and in vivo for spectrum and degree of antitumor activity. In vitro, the concentration of carmethizole required to produce a 50% reduction in clonogenic cell survival was identical in O6-alkylguanine DNA alkyltransferase-positive and -negative human cell lines. The CHO cell line UV4, hypersensitive to mono- and bifunctional alkylating agents, was 37-fold more sensitive to carmethizole than normal cells. The UV5 cell line, which is not hypersensitive to cross-linkers, was 13-fold more sensitive to carmethizole than normal cells. Alkaline elution studies in L1210 cells exposed to carmethizole showed the presence of DNA-protein and DNA-DNA cross-links but not DNA strand breaks. These data suggested that the interaction of carmethizole with DNA produces monoadducts, DNA-protein, and DNA-DNA interstrand cross-links at several sites. In vivo, carmethizole was not cross-resistant with 1,3-bis(2-chloroethyl)-1-nitrosourea or Cytoxan as determined by testing against P388 leukemias resistant to the latter 2 agents. Carmethizole activity was similar to that of melphalan across the murine solid tumor panel, which consisted of B16 melanoma; colon adenocarcinomas 11a, 26, and 36; and the KHT sarcoma. Carmethizole, Cytoxan, and melphalan were all active and had comparable activity against the HCT-8 and MX-1 human tumor xenografts. The in vivo spectrum of activity and efficacy of carmethizole was similar to that of melphalan.
Strong green photoluminescence from InxGa_1-xN/GaN nanorod arrays (2009)

We report intense green photoluminescence (PL) from vertically aligned indium gallium nitride (InxGa(1-x)N) nanorod arrays. The formation of InxGa(1-x)N/GaN-heterostructure nanorods increases the localization depth of the radially confined carriers (> 100 meV). Temperature dependent PL peak energy of InGaN nanorods shows the characteristic S-shaped behavior, indicating the prominent carrier trapping in band-tail states associated with the nonuniformity of In content. Time-resolved PL (TRPL) response decays biexponentially and the dominant slow decay component of TRPL for InxGa(1-x)N nanorods is due to the transfer of excitons to the localized states before the radiative decay.
REACTION OF DIAZOKETONES IN THE PRESENCE OF METAL CHELATES. REACTION WITH β-DIKETONES (1976)

Abstract Copper chelate catalyzed decomposition of substituted α-diazoacetophenones and ethyl diazoacetate in the presence of dibenzoylmethane and benzoylacetone gave two types of products; one was that of formal insertion product of ketocarbene into C–H bond, and the other was into C–CO bond of β-diketone. These products were explained by the cyclopropanation of ketocarbene with C=C double bond of enol form of β-diketone followed by ring opening and proton shift.
Plenoptics for optical wireless sensor networks (2013)

In this paper, a new approach for ad-hoc wireless optical sensor networks is presented. It is based on using simple cameras as receivers for non-addressable, low baud rate sensors. We also propose the use of plenoptic cameras so as to reduce the near-far induced penalty present on this kind of networks. This architecture reduces receiver complexity and simplifies the discovery procedure. This network strategy can be combined with VLC or RF systems so as to be used in conventional-bidirectional networks.
A Structurally Novel Transferrin-like Protein Accumulates in the Plasma Membrane of the Unicellular Green Alga Dunaliella salina Grown in High Salinities (1997)

The alga Dunaliella salina is outstanding is its ability to withstand extremely high salinities. To uncover mechanisms underlying salt tolerance, a search was carried out for salt-induced proteins. The level of a plasma membrane 150-kDa protein, p150, was found to increase with rising external salinity (Sadka, A., Himmelhoch, S., and Zamir, A. (1991) Plant Physiol. 95, 822-831). Based on its cDNA-deduced sequence, p150 belongs to the transferrin family of proteins so far identified only in animals. This, to our best knowledge, is the first demonstration of a transferrin-like protein in a photosynthetic organism. Unlike animal transferrins, p150 contains three, rather than two, internal repeats and a COOH-terminal extension including an acidic amino acid cluster. In intact cells p150 is degraded by Pronase, indicating that the protein is extracellularly exposed. The relationship of p150 to iron uptake is supported by the induction of the protein in iron-deficient media and by its radioactive labeling in cells grown with 59Fe. Accumulation of p150 is transcriptionally regulated. It is proposed that p150 acts in iron uptake other than by receptor-mediated endocytosis and that its induction permits the cells to overcome a possible limitation in iron availability under high salinities.
Visual Correlates of Mobility in Real World Settings in Older Adults with Low Vision (1998)

Reducing illumination levels from photopic to mesopic has an adverse effect upon mobility in older visually impaired adults. The aspects of vision which best predict performance include measures of sensory and perceptual visual function. The results compare well with those obtained under controlled laboratory conditions.
Universal Demosaicking for Interpolation-Friendly RGBW Color Filter Arrays (2023)

Interpolation-friendly RGBW color filter arrays (CFAs) and the popular sequential demosaicking contain the idea of computational photography, where the CFA and the demosaicking method are co-designed. Due to the advantages, interpolation-friendly RGBW CFAs have been extensively used in commercial color cameras. However, most associated demosaicking methods rely on strict assumptions or are limited to a few specific CFAs with a given camera. In this paper, we propose a universal demosaicking method for interpolation-friendly RGBW CFAs, which enables the comparison of different CFAs. Our new method belongs to sequential demosaicking, i.e., W channel is interpolated first and then RGB channels are reconstructed with guidance from the interpolated W channel. Specifically, it first interpolates the W channel using only available W pixels followed by an aliasing reduction technique to remove aliasing artifacts. Then it employs an image decomposition model to built relations between W channel and each of RGB channels with known RGB values, which can be easily generalized to the full-size demosaicked image. We apply the linearized alternating direction method (LADM) to solve it with convergence guarantee. Our demosaicking method can be applied to all interpolation-friendly RGBW CFAs with varying color cameras and lighting conditions. Extensive experiments confirm the universal property and advantage of our proposed method with both simulated and real raw images.
The mannose receptor (2012)

The MR is a highly effective endocytic receptor with a broad binding specificity encompassing ligands of microbial and endogenous origin and a poorly characterized ability to modulate cellular activation. This review provides an update of the latest developments in the field. It discusses how MR biology might be affected by glycosylation and proteolytic processing, MR involvement in antigen delivery, and the potential contribution of MR to T cell differentiation and cellular activation. Further understanding of these areas will, no doubt, inform the design of novel, therapeutic tools for improved vaccination, control of inflammation, and tumor chemotherapy, which will benefit from exploiting MR-efficient internalization properties and unique pattern of expression.
Neurochemical Alterations in Adolescent Bipolar Depression: A Proton Magnetic Resonance Spectroscopy Pilot Study of the Prefrontal Cortex (2008)

There may be localized alterations in brain neurometabolites in adolescents with bipolar depression. Limitations include lack of bipolar adolescents in other mood states and potential confounding effects of prior psychotropic medication use. Confirmatory (1)H MRS studies in larger samples of youths with bipolar depression are needed.
Dynamics of Ribosomal Protein S1 on a Bacterial Ribosome with Cross-Linking and Mass Spectrometry (2012)

Ribosomal protein S1 has been shown to be a significant effector of prokaryotic translation. The protein is in fact capable of efficiently initiating translation, regardless of the presence of a Shine-Dalgarno sequence in mRNA. Structural insights into this process have remained elusive, as S1 is recalcitrant to traditional techniques of structural analysis, such as x-ray crystallography. Through the application of protein cross-linking and high resolution mass spectrometry, we have detailed the ribosomal binding site of S1 and have observed evidence of its dynamics. Our results support a previous hypothesis that S1 acts as the mRNA catching arm of the prokaryotic ribosome. We also demonstrate that in solution the major domains of the 30S subunit are remarkably flexible, capable of moving 30-50Å with respect to one another.
Feasibility of a chronic, minimally invasive endovascular neural interface (2016)

Development of a neural interface that can be implanted without risky, open brain surgery will increase the safety and viability of chronic neural recording arrays. We have developed a minimally invasive surgical procedure and an endovascular electrode-array that can be delivered to overlie the cortex through blood vessels. Here, we describe feasibility of the endovascular interface through electrode viability, recording potential and safety. Electrochemical impedance spectroscopy demonstrated that electrode impedance was stable over 91 days and low frequency phase could be used to infer electrode incorporation into the vessel wall. Baseline neural recording were used to identify the maximum bandwidth of the neural interface, which remained stable around 193 Hz for six months. Cross-sectional areas of the implanted vessels were non-destructively measured using the Australian Synchrotron. There was no case of occlusion observed in any of the implanted animals. This work demonstrates the feasibility of an endovascular neural interface to safely and efficaciously record neural information over a chronic time course.
Electron paramagnetic resonance studies of amine-cured epoxy resins: dependence of nitroxide spin-probe mobility on crosslink density, free volume, and temperature (1984)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron paramagnetic resonance studies of amine-cured epoxy resins: dependence of nitroxide spin-probe mobility on crosslink density, free volume, and temperatureT. C. Sandreczki and I. M. BrownCite this: Macromolecules 1984, 17, 9, 1789–1794Publication Date (Print):September 1, 1984Publication History Published online1 May 2002Published inissue 1 September 1984https://pubs.acs.org/doi/10.1021/ma00139a028https://doi.org/10.1021/ma00139a028research-articleACS PublicationsRequest reuse permissionsArticle Views121Altmetric-Citations13LEARN 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