gebhart/patrepeval huggingface dataset:
Interactions between retinoic acid and colony-stimulating factors affecting the blast cells of acute myeloblastic leukemia. (1991)

The responses to retinoic acid (RA) of acute myeloblastic leukemia (AML) blasts and normal hemopoietic progenitors was examined under defined growth factor conditions. For the leukemic cells marked patient to patient variation was seen; blast colony formation by cells from some patients was stimulated by RA without growth factors or in the presence of recombinant granulocyte colony-simulating factor (rG-CSF), recombinant granulocyte-macrophage-CSF rGM-CSF and recombinant interleukin-3 (rIL-3); for other populations inhibition was observed under the same conditions. Some blast cells were stimulated by RA in the presence of rGM-CSF and rIL-3 and inhibited when cultured with RA and rG-CSF. Supernatants prepared from blasts cultured with RA and growth factors did not show activities that were not readily explained by the carry-over of growth factors; this result did not provide evidence that RA and growth factors interact to produce factors. Titrations of RA showed that activity was first observed at concentrations of 10(-9) M and was maximum at concentrations of 10(-7) M. Different effects of RA in combination with rG-CSF compared with rGM-CSF or IL-3 were not seen when the cells were tested in suspension culture rather than in methylcellulose, a finding that may be interpreted to mean that the interaction between RA and factors affects terminally-dividing blast cells. Three normal bone marrow samples were cultured with RA and growth factors. Colony formation was stimulated by RA in the presence of rGM-CSF or rIL-3 but inhibited by RA with rG-CSF. Thus a differential effect of RA in combination with growth factors occurs in normal hemopoietic cells and persists in some AML populations.
Pentacoordinated molecules. 79. Pentacoordinate acyclic and cyclic anionic oxysilicates. A silicon-29 NMR and x-ray structural study (1990)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPentacoordinated molecules. 79. Pentacoordinate acyclic and cyclic anionic oxysilicates. A silicon-29 NMR and x-ray structural studyK. C. Kumara Swamy, V. Chandrasekhar, John J. Harland, Joan M. Holmes, Roberta O. Day, and Robert R. HolmesCite this: J. Am. Chem. Soc. 1990, 112, 6, 2341–2348Publication Date (Print):March 1, 1990Publication History Published online1 May 2002Published inissue 1 March 1990https://pubs.acs.org/doi/10.1021/ja00162a039https://doi.org/10.1021/ja00162a039research-articleACS PublicationsRequest reuse permissionsArticle Views1190Altmetric-Citations83LEARN 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-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
On Colour Spaces for Change Detection and Shadow Suppression (2006)

In this paper, common colour models for back- ground subtraction and problems related to their utilisation are discussed. A novel approach to represent chrominance information more suitable for robust background modelling and shadow suppression is proposed. Our method relies on the ability to represent colours in terms of a 3D-polar coor- dinate system having saturation independent of the bright- ness function; specifically, we build upon an Improved Hue, Luminance, and Saturation space (IHLS). The additional peculiarity of the approach is that we deal with the problem of unstable hue values at low saturation by modelling the hue-saturation relationship using saturation-weighted hue statistics. The effectiveness of the proposed method is shown in an experimental comparison with an approach based on normalised RGB.
General Russian Bibliography (2011)

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Robot perception planning for industrial inspection (2004)

A perception planning method is proposed in this paper to automatically determine sensor positions for a robot in industrial inspection tasks. We consider that there exists a target model in the robot system and the vision sensor needs to move from one pose to another around the target to observe many geometrical features. Multiple 3D images are then taken from different vantage viewpoints and integrated together to analyze the manufacturing quality of the industrial part. Such a perception-planning problem involves determination of the least sensing operations, the optimal spatial distribution sensor placements, and a shortest path through these viewpoints. During the planning, object features are sampled as individual points to reduce the computational complexity. The optimal sensor distribution and robot execution path are determined by objective functions. Experiments are also carried out to demonstrate the proposed method.
A study of the path availability improvements in a large network for various route diversity protection strategies, using failure event simulation (1989)

This study was motivated by the need to understand the way in which protection equipment capable of rerouting traffic lost after a section or route failure around that failure improves the path availability across a trunk network. Since no assumptions are made about bit rates in the results, then they may equally be applied not only to trunk networks but to regional and even local networks. Particular reference is made to SONET or SDH networks. It is arguable that PSTN switches such as System X are capable of rerouting traffic at the 2 mB/s level around failed links. At the local and regional level, this may be a suitable mechanism for PSTN traffic, but trunk traffic capacities are so high (64 to 256 by 2 Mb/s) and since the need is for service restoration in the order of a few seconds at most, trunk level protection needs to be done at 34 Mb/s or higher using dedicated equipment. The background, basic theory and computer model results for various route failure protection networks and protection strategies have been given. Results show that the performance of a protection system are most affected by the failure rates (particularly that of routes), the repair rates, the amount of transmission plant dedicated to protection, and the mean valence of network nodes. >
Fisher-information-based data compression for estimation using two sensors (2005)

A transform coding data compression method is developed for the case of making estimates from data collected using two sensors. We focus on the transfer of data from one sensor to another sensor, where the shared data is then used with the local data to estimate a parameter. Particular attention is paid to the case where neither sensor alone can estimate the parameter from its data. The method uses an operational rate-distortion viewpoint together with a distortion measure based on the Fisher information (FI) of the estimation problem. Explicit means of using the transformed data to compute operational measures of the FI are given. An integer optimization version of the Lagrange multiplier method is used to efficiently determine the optimal operating point of the transform compression algorithm. The advantages of the method lie in its ability to use transform coding to effectively capture the impact of compression on estimation accuracy in a way that lends itself to efficient optimization within the operational rate-distortion viewpoint. The applicability and effectiveness of the method are demonstrated for two illustrative examples: 1) estimation of time-difference-of-arrival (TDOA), and 2) estimation of frequency-difference-of-arrival (FDOA). In these two cases it is shown that the Fisher-information-based method outperforms the standard mean-square error (MSE) approach.
Characterizing the Grape Transcriptome. Analysis of Expressed Sequence Tags from Multiple Vitis Species and Development of a Compendium of Gene Expression during Berry Development (2005)

We report the analysis and annotation of 146,075 expressed sequence tags from Vitis species. The majority of these sequences were derived from different cultivars of Vitis vinifera, comprising an estimated 25,746 unique contig and singleton sequences that survey transcription in various tissues and developmental stages and during biotic and abiotic stress. Putatively homologous proteins were identified for over 17,752 of the transcripts, with 1,962 transcripts further subdivided into one or more Gene Ontology categories. A simple structured vocabulary, with modules for plant genotype, plant development, and stress, was developed to describe the relationship between individual expressed sequence tags and cDNA libraries; the resulting vocabulary provides query terms to facilitate data mining within the context of a relational database. As a measure of the extent to which characterized metabolic pathways were encompassed by the data set, we searched for homologs of the enzymes leading from glycolysis, through the oxidative/nonoxidative pentose phosphate pathway, and into the general phenylpropanoid pathway. Homologs were identified for 65 of these 77 enzymes, with 86% of enzymatic steps represented by paralogous genes. Differentially expressed transcripts were identified by means of a stringent believability index cutoff of > or =98.4%. Correlation analysis and two-dimensional hierarchical clustering grouped these transcripts according to similarity of expression. In the broadest analysis, 665 differentially expressed transcripts were identified across 29 cDNA libraries, representing a range of developmental and stress conditions. The groupings revealed expected associations between plant developmental stages and tissue types, with the notable exception of abiotic stress treatments. A more focused analysis of flower and berry development identified 87 differentially expressed transcripts and provides the basis for a compendium that relates gene expression and annotation to previously characterized aspects of berry development and physiology. Comparison with published results for select genes, as well as correlation analysis between independent data sets, suggests that the inferred in silico patterns of expression are likely to be an accurate representation of transcript abundance for the conditions surveyed. Thus, the combined data set reveals the in silico expression patterns for hundreds of genes in V. vinifera, the majority of which have not been previously studied within this species.
A novel centralized beamforming scheme for radio-over-fiber systems with fixed wavelength allocation (2019)

This paper proposes a novel centralized beamforming scheme for Radio-over-Fiber (RoF) systems with fixed wavelength allocation. The proposed scheme offers more wavelength utilization efficiency than the conventional beamforming methods that control wavelength allocation, and can control beam direction without explicit control by the base stations (BSs). Moreover, the scheme makes information about optical fiber length unnecessary, and supports systems that use high radio frequency (RF) signals or long optical fiber. Simulations evaluate and confirm the feasibility of the scheme for a system that uses 60 GHz RF signals, 10 km optical fiber, and 8-element linear array antennas.
Protein sorption and recovery by hydrogels using principles of aqueous two‐phase extraction (1998)

Use of the thermodynamic principles of aqueous two-phase extraction (ATPE) to drive protein into a crosslinked gel is developed as a protein isolation and separation technique, and as a protein loading technique for drug delivery applications. A PEG/dextran gel system was chosen as a model system because PEG/dextran systems are widely used in aqueous two-phase extraction and dextran gels (Sephadex®) are common chromatographic media. The effects of polymer concentrations and molecular weights, salts, and pH on the partitioning of ovalbumin matched ATPE heuristics and data trends. Gel partition coefficients (Cgel/Csolution) increased with increasing PEG molecular weight and concentration and decreasing dextran concentration (increased gel swelling). The addition of PEG to the buffer solution yielded partition coefficients more than an order of magnitude greater than those obtained in systems with buffer alone, or added salt. A combined salt/PEG system yielded an additional order of magnitude increase. For example, when ovalbumin solution (2.3 mg/mL) was equilibrated with Sephadex® G-50 at pH 6.75, the partition coefficients were 0.13 in buffer, 0.11 in buffer with 0.22M KI, 2.3 in 12 wt% PEG-10,000 and 32.0 in 12 wt% PEG-10,000 with 0.22M KI. The effect of anions and cations as well as ionic strength and pH on the partitioning of ovalbumin also matched ATPE heuristics. Using the heuristics established above, partition coefficients as high as 80 for bovine serum albumin and protein recoveries over 90% were achieved. In addition, the wide range of partition coefficients that were obtained for different proteins suggests the potential of the technique for separating proteins. Also, ovalbumin sorption capacities in dextran were as high as 450 mg/g dry polymer, and the sorption isotherms were linear over a broad protein concentration range. © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 58:416-427, 1998.
Synthesis of Ketones from α‐Oxocarboxylates and Aryl Bromides by Cu/Pd‐Catalyzed Decarboxylative Cross‐Coupling (2008)

The power of two metals: A Pd/Cu catalyst system mediates the in situ formation of acyl nucleophiles by decarboxylation of readily accessible and stable salts of α-oxocarboxylic acids and their cross-coupling with aryl or heteroaryl bromides to give ketones. The reaction may be used in the presence of many functional groups and provides good yields. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z705127_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Spectral imaging in a snapshot (2005)

We describe a new filter that simultaneously achieves spectral filtering and image replication to yield a two-dimensional, snapshot spectral imager. Filtering is achieved by spectral demultiplexing; that is without rejection of light; so optical throughput efficiency is, in principle, unity. The principle of operation can be considered as a generalisation of the Lyot filter to achieve multiple bandpasses. We report on the design and experimental implementation of an eight-band system for use in the visible. Proof-of-concept demonstrations are reported for imaging of the ocular fundus and microscopy of fluorescently labelled living cells.
Repopulation of freeze-dried porcine valves with human fibroblasts and endothelial cells. (1997)

Although these results are preliminary, they demonstrate the basic feasibility of this approach to the production of xenogeneic valves that contain the patient's own cells.
Oxidized radon in halogen fluoride solutions (1969)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidized radon in halogen fluoride solutionsLawrence SteinCite this: J. Am. Chem. Soc. 1969, 91, 19, 5396–5397Publication Date (Print):September 1, 1969Publication History Published online1 May 2002Published inissue 1 September 1969https://pubs.acs.org/doi/10.1021/ja01047a042https://doi.org/10.1021/ja01047a042research-articleACS PublicationsRequest reuse permissionsArticle Views59Altmetric-Citations14LEARN 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
The Prevalence of Group B Streptococci in Human Urogenital Secretions (1979)

Urogenital secretions from a total of 510 patients (153 female and 151 male venereological patients, 123 gynaecological patients and 83 gynaecologically normal women) have been examined for group B streptococci (B-str.) and gonococci. The prevalence of B-str. (32%) among the female venereological patients was significantly higher than among the gynaecological patients (21.1%) and normal women (18.0%). Urethral samples gave a higher recovery rate of B-str. than cervical samples. A significant correlation was demonstrated between the presence of B-str. and the diagnosis of vaginitis in the gynaecological material. Fermentation types of B-str. isolated from urogenital patients differed considerably from the types prevalent in bovine isolates.
Diffusion MRI of complex tissue structure (2002)

Thesis (Ph. D.)--Harvard--Massachusetts Institute of Technology Division of Health Sciences and Technology, 2002.
Reactivation of Promoted Nickel Catalysts for Deuterium Exchange between Hydrogen and Water in the Vapour Phase (1980)

Binary promoted nickel – chromium oxide and ternary promoted nickel – chromium oxide – aluminium oxide mixed catalysts were prepared for use in the present study. The catalysts were prepared by co-precipitation of the corresponding metal nitrates as carbonates followed by calcination in nitrogen atmosphere at 350 °C and reduction in hydrogen atmosphere at 320 °C. To prevent spontaneous oxidation of the catalysts, bidistilled water was added followed by heating of the catalyst mixtures at about 110 °C in hydrogen atmosphere for few hours. Deactivation of catalysts was studied by measurements of the variation of their activities with the time of contact of the reacting gas mixtures with the catalyst surface in the reaction chamber. It was found that while the catalytic activity of ternary catalysts for the isotopic exchange of deuterium between hydrogen and water vapour was higher than that of the binary one, the loss in activity of the former teas faster than the latter. Reactivation of the catalysts were carried out at different temperatures between 110–160°C in hydrogen atmosphere. Catalytic activity measurements indicated that higher temperatures are better for the reactivation process.
Aperture-coupled reflectarray element with wide range of phase delay (2006)

An aperture-coupled phase-shifter element providing a very wide range of phase delay is proposed as a unit cell in reflectarrays. A range of phase delay larger than 1600° has been achieved by using a U-shaped true-time delay line. Theoretical results are validated by comparing them with the measurements of two elements in a waveguide simulator, showing good agreement for both phase delay and losses.
Konkave Farbstoffe mit Azobenzol‐Einheiten als Chromophore, Photoschaltelemente und hohlraumbildende Bausteine (1992)

Concave Dyes with Azobenzene Units as Chromophores, Photoswitchable and Cavity‐Forming Elements Five monomacrocyclic ( 12a–e ) and three types of threefold azobenzene‐bridged oligomacrocyclic compounds ( 15, 17, 28, 31 ) have been synthesized. Due to the cavity‐forming chromophores at the periphery of these molecules they represent concave dyes. The watersoluble monocycles 12b–e were photoisomerized and investigated before and after E/Z isomerization with regard to their host properties for small neutral organic guest compounds. The bicyclic azobenzene derivative 31 with triphenylethane spacers exhibits in/out isomerism. The in/out isomer 31c was separated by HPLC from 31a and b , which are in equilibrium at room temperature. The tris(2‐aminoethyl)amine‐capped Schiff bases 15 and 17 form complexes with Cu(CH 3 CN) 4 BF 4 .
Optically sectioned imaging by oblique plane microscopy (2009)

An optically sectioning microscopy technique based on oblique selective plane illumination combined with oblique imaging is described. The same high numerical aperture lens is used to both illuminate and image the specimen and correction optics are employed to tilt the focal plane of the imaging system so that the imaged plane aligns with the illuminated plane in the specimen. An optically sectioned image is obtained without the use of moving parts or image processing and this technique therefore has the potential to be used for very high speed optically sectioned microscopy. As only the part of the specimen that is being imaged is illuminated then the photobleaching and phototoxicity of this method is low compared to conventional microscopy techniques.
Explicit construction of families of LDPC codes with no 4-cycles (2004)

LDPC codes are serious contenders to turbo codes in terms of decoding performance. One of the main problems is to give an explicit construction of such codes whose Tanner graphs have known girth. For a prime power q and m/spl ges/2, Lazebnik and Ustimenko construct a q-regular bipartite graph D(m,q) on 2q/sup m/ vertices, which has girth at least 2/spl lceil/m/2/spl lfloor/+4. We regard these graphs as Tanner graphs of binary codes LU(m,q). We can determine the dimension and minimum weight of LU(2,q), and show that the weight of its minimum stopping set is at least q+2 for q odd and exactly q+2 for q even. We know that D(2,q) has girth 6 and diameter 4, whereas D(3,q) has girth 8 and diameter 6. We prove that for an odd prime p, LU(3,p) is a [p/sup 3/,k] code with k/spl ges/(p/sup 3/-2p/sup 2/+3p-2)/2. We show that the minimum weight and the weight of the minimum stopping set of LU(3,q) are at least 2q and they are exactly 2q for many LU(3,q) codes. We find some interesting LDPC codes by our partial row construction.
Unusual fatty acid substitution in lipids and lipopolysaccharides of Helicobacter pylori (1990)

Cellular fatty acids, phospholipid fatty acids, and lipopolysaccharide fatty acids of four strains of Helicobacter pylori were analyzed by gas-liquid chromatography. The presence of myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, 19-carbon cyclopropane fatty acid, beta-hydroxypalmitic acid, and beta-hydroxystearic acid was confirmed. In phospholipids, myristic acid and 19-carbon cyclopropane fatty acid were the major fatty acids. Hydroxy fatty acids and unsaturated fatty acids were not detected or occurred only in small amounts. The major fatty acids of lipopolysaccharides were stearic acid, beta-hydroxypalmitic acid, and beta-hydroxystearic acid. Unsaturated fatty acids and 19-carbon cyclopropane fatty acid were not found. The unusual compositions of H. pylori phospholipid and lipopolysaccharide fatty acids may have important implications for the taxonomy, physicochemical membrane properties, and biological activity of lipopolysaccharides.