gebhart/patrepeval huggingface dataset:
Smartphone positioning with radio measurements from a single wifi access point (2019)

Despite the large literature on localization, there is no solution yet to localize a commercial off-the-shelf smartphone device using radio measurements from a single WiFi AP. We present SPRING, Smartphone Positioning with Radio measurements from a sINGle wifi access point. SPRING exploits Fine Time Measurements (FTM) and Angle of Arrival (AOA) extracted from commercial chipsets exploiting the specifications of the recent 802.11-2016 and the 802.11ac amendment to combine distance and direction from the AP to the client for positioning. Our system has the potential to bring indoor positioning to homes and small businesses which typically have a single access point. We exploit physical layer (PHY) information to detect the number of paths and their directions. We use this information to derive a new method for filtering ranging measurements obtained with the FTM protocol. We achieve sub-meter distance estimation accuracy eliminating the adverse effect of multipath in FTM using calibrated inputs from Channel State Information (CSI). Our evaluation in indoor scenarios in multipath rich environments demonstrates that the combination of AOA estimation and the proposed FTM refinement approach can locate a Google Pixel 3 smartphone with a median positioning error of 0.9-2.15 m through an area comparable to typical flat sizes.
PHOTOREFRACTIVE POLYMER STACKS (1997)

RETURN TO ISSUEPREVNewsNEXTPHOTOREFRACTIVE POLYMER STACKSComposite sandwiches rival inorganic counterparts as optical amplifiersMITCH JACOBYCite this: Chem. Eng. News 1997, 75, 30, 8Publication Date (Print):July 28, 1997Publication History Published online12 November 2010Published inissue 28 July 1997https://pubs.acs.org/doi/10.1021/cen-v075n030.p008https://doi.org/10.1021/cen-v075n030.p008newsACS PublicationsCopyright © 1997 AMERICAN CHEMICAL SOCIETYArticle Views5Altmetric-Citations-LEARN 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 options SUBJECTS:Crystallization,Crystals,Polymer films,Polymer science,Polymers Get e-Alerts
Chemical depolymerization of dextran sulfate sodium—the application of size‐exclusion or ion‐pair liquid chromatography (2007)

We reported previously a method for the separation and quantification of sulfated polysaccharides, dextran sulfate sodium (DSS), using fluorometric labeling and size-exclusion chromatography (SEC). In the present study, we evaluated chemical depolymerization of DSS. In fluorometric analyses using SEC, pyridylamino-DSS (PA-DSS) was depolymerized under acidic conditions, but not under alkaline conditions. In addition, we used ion-pair liquid chromatography (IPLC) and UV analyses for the separation and quantification of sulfate. Sulfate was considerably depleted from DSS under alkaline conditions, but little depleted under acidic conditions. Spectrophotometric studies using toluidine blue revealed that molecular mass is an important factor and a minimum molecular mass of 2500 is needed to induce metachromasia. Fluorometric analyses using SEC and UV analyses using IPLC allow for the detection of DSS, reactants and sulfate.
Active control of nonlinear noise processes in a linear duct (1998)

This paper investigates two scenarios in active noise control (ANC) that lead to performance degradation with conventional linear control techniques. The first scenario addresses the noise itself. The low-frequency noise, traveling as plane waves in a duct, is usually assumed to be broadband random or periodic tonal noise. Linear techniques applied to actively control this noise have been shown to be successful. However, in many practical applications, the noise often arises from dynamical systems, which cause the noise to be nonlinear and deterministic or stochastic, colored, and non-Gaussian. Linear techniques cannot fully exploit the coherence in the noise and, therefore, perform suboptimally. The other scenario is that the actuator in an ANC system has been shown to be nonminimum phase. One of the tasks of the controller, in ANC systems, is to model the inverse of the actuator. Obviously, a linear controller is not able to perform that task. To combat the problems, as mentioned above, a nonlinear controller has been implemented in the ANC system. It is shown in this paper that the nonlinear controller consists of two parts: a linear system identification part and a nonlinear prediction part. The standard filtered-x algorithms cannot be used with a nonlinear controller, and therefore, the control scheme was reconfigured. Computer simulations have been carried out and confirm the theoretical derivations for the combined nonlinear and linear controller.
Development Path for Agricultural Modernization of Shaanxi Province from the Perspective of Technological Progress (2013)

The lag in technological innovation is a bottleneck for modern agricultural development, so technological progress is an inevitable path to break this bottleneck. On the basis of introducing theory of technological progress, this study presents 4 paths for promoting agricultural modernization development in line with current situations of agricultural development and technological progress in Shaanxi Province.
Phenyl-4-phenyl-2-thiazolyl Diketones (1968)

Phenylglyoxal was condensed with benzoyl chloride in presence of potassium cyanide and the cyanohydrin obtained was converted into \(\alpha\)-Benzyoloxy- \(\alpha\)-benzoylthioacetamide by hydrogen sulphide. This was then condensed with substituted w-bromoacetophenones. The thiazoles obtained, on hydrolysis and oxidation gave phenyl-4-phenyl-2-thiazolyl diketones.
Reactive Ion Etching of Diamond in O<sub>2</sub> and CF<sub>4</sub> Plasma, and Fabrication of Porous Diamond for Field Emitter Cathodes (1997)

Reactive ion etching (RIE) of synthetic Ib diamond and chemical vapor deposition (CVD) diamond films in O 2 and CF 4 has been investigated. The large etch rate of up to 2.8 µ m/h and etch rate ratios of 15–20 for diamond (100)/Al were obtained at CF 4 /O 2 =10–20%. Numerous columnar structures of approximately 300 nm length and 10 nm width have been made by etching CVD polycrystalline diamond films in O 2 plasma. The structures made the diamond film “porous”. A comparative study of field emission characteristics has been made for as-grown diamond films and porous diamond films. The average turn-on field was in the range of 2–3 V/µ m for porous diamond films and 6–8 V/µ m for as-grown diamond films.
Ultrasonic testing of adhesive bonds of thick composites with applications to wind turbine blades (2012)

This paper discusses the use of pulse echo based ultrasonic testing for the inspection of adhesive bonds between very thick composite plates (thickness greater than 30 mm). Large wind turbine blades use very thick composite plates for its main structural members, and the inspection of adhesive bond-line is very vital. A wide gamut of samples was created by changing the thickness of plate and the adhesive. The influence of experimental parameters such as frequency on measurement is studied in this paper. Two different frequencies are chosen, and the measurement error bars are determined experimentally. T-Ray measurements were used to verify and correct results, and conclusions are made based on the combined results.
Phenotypic and genetic analysis of Lymantria dispar nucleopolyhedrovirus few polyhedra mutants: mutations in the 25K FP gene may be caused by DNA replication errors (1997)

We previously demonstrated that polyhedron formation (PF) mutants arise at a high frequency during serial passage of the Lymantria dispar nucleopolyhedrovirus (LdMNPV) in the L. dispar 652Y cell line (J. M. Slavicek, N. Hayes-Plazolles, and M. E. Kelly, Biol. Control 5:251-261, 1995). Most of these PF mutants exhibited the traits of few polyhedra (FP) mutants; however, no large DNA insertions or deletions that correlated with the appearance of the FP phenotype were found. In this study, we have characterized several of the PF mutants at the phenotypic and genetic levels. Genetic techniques were used to group the mutations in the LdMNPV PF mutants to the same or closely linked genes. Wild-type viruses were recovered after coinfection of L. dispar 652Y cells with certain combinations of PF mutants. These viruses were analyzed by restriction endonuclease analysis and found to be chimeras of the original PF mutants used in the coinfections. Marker rescue experiments localized the mutations in one group of PF isolates to the region containing the LdMNPV 25K FP gene. The mutations in these PF mutants were identified. Four of five of the LdMNPV FP mutants contain small insertions or deletions within the 25K FP gene. The fifth LdMNPV FP mutant analyzed contained a large deletion that truncated the C terminus of the 25K FP gene product. All of the deletions occurred within the same potential hairpin loop structure, which had the lowest free energy value (most stable hairpin) of the five potential hairpin loop structures present in the 25K FP gene. One of the insertion mutants contained an extra base within a repetitive sequence. These types of mutations are likely caused by errors that occur during DNA replication. The relationship between the types of mutations found within the LdMNPV 25K FP gene and DNA replication-based mutagenesis is discussed.
Bioorthogonal Chemical Reporters for Selective In Situ Probing of Mycomembrane Components in Mycobacteria (2016)

The global pathogen Mycobacterium tuberculosis and other species in the suborder Corynebacterineae possess a distinctive outer membrane called the mycomembrane (MM). The MM is composed of mycolic acids, which are either covalently linked to an underlying arabinogalactan layer or incorporated into trehalose glycolipids that associate with the MM non-covalently. These structures are generated through a process called mycolylation, which is central to mycobacterial physiology and pathogenesis and is an important target for tuberculosis drug development. Current approaches to investigating mycolylation rely on arduous analytical methods that occur outside the context of a whole cell. Herein, we describe mycobacteria-specific chemical reporters that can selectively probe either covalent arabinogalactan mycolates or non-covalent trehalose mycolates in live mycobacteria. These probes, in conjunction with bioorthogonal chemistry, enable selective in situ detection of the major MM components.
Dry Reforming of Methane on a Highly‐Active Ni‐CeO<sub>2</sub> Catalyst: Effects of Metal‐Support Interactions on C−H Bond Breaking (2016)

Ni-CeO2 is a highly efficient, stable and non-expensive catalyst for methane dry reforming at relative low temperatures (700 K). The active phase of the catalyst consists of small nanoparticles of nickel dispersed on partially reduced ceria. Experiments of ambient pressure XPS indicate that methane dissociates on Ni/CeO2 at temperatures as low as 300 K, generating CHx and COx species on the surface of the catalyst. Strong metal-support interactions activate Ni for the dissociation of methane. The results of density-functional calculations show a drop in the effective barrier for methane activation from 0.9 eV on Ni(111) to only 0.15 eV on Ni/CeO2-x (111). At 700 K, under methane dry reforming conditions, no signals for adsorbed CHx or C species are detected in the C 1s XPS region. The reforming of methane proceeds in a clean and efficient way.
Increased Level of Extracellular ATP at Tumor Sites: In Vivo Imaging with Plasma Membrane Luciferase (2008)

Our results show that ATP in the tumour interstitium is in the hundreds micromolar range, while it is basically undetectable in healthy tissues. Here we show that a chimeric plasma membrane-targeted luciferase allows in vivo detection of high extracellular ATP concentration at tumour sites. On the contrary, tumour-free tissues show undetectable extracellular ATP levels. Extracellular ATP may be crucial for the tumour not only as a stimulus for growth but also as a source of an immunosuppressive agent such as adenosine. Our approach offers a new tool for the investigation of the biochemical composition of tumour milieu and for development of novel therapies based on the modulation of extracellular purine-based signalling.
Crime Forecasting Using Data Mining Techniques (2011)

Crime is classically "unpredictable". It is not necessarily random, but neither does it take place consistently in space or time. A better theoretical understanding is needed to facilitate practical crime prevention solutions that correspond to specific places and times. In this study, we discuss the preliminary results of a crime forecasting model developed in collaboration with the police department of a United States city in the Northeast. We first discuss our approach to architecting datasets from original crime records. The datasets contain aggregated counts of crime and crime-related events categorized by the police department. The location and time of these events is embedded in the data. Additional spatial and temporal features are harvested from the raw data set. Second, an ensemble of data mining classification techniques is employed to perform the crime forecasting. We analyze a variety of classification methods to determine which is best for predicting crime "hotspots". We also investigate classification on increase or emergence. Last, we propose the best forecasting approach to achieve the most stable outcomes. The result of our research is a model that takes advantage of implicit and explicit spatial and temporal data to make reliable crime predictions.
Les évangéliques au Brésil : stratégies territoriales et participation politique (2005)

Au Brésil, près de 20% de la population appartient à l’univers évangélique. L’expansion des Églises évangéliques sur l’ensemble du territoire menace désormais le pouvoir de l’Église catholique. Au-delà de son versant mystique, symbolique, la religion matérialise sa présence dans l’espace, avec une stratégie d’expansion, une vision de l’organisation spatiale. L’organisation centralisée de l’Église catholique, avec un quadrillage exhaustif du territoire, doit être confrontée à la souplesse des Églises évangéliques, autonomes, ouvrant des filiales sur l’ensemble du territoire. Une comparaison de ces deux modes de fonctionnement, et surtout des différentes formes d’occupation territoriale adoptées par l’Église catholique et les Églises évangéliques, peut expliquer en grande partie le succès actuel de ces dernières mais aussi l’impressionnante perte de terrain de la première.
Mitogenic conversion of transforming growth factor-beta1 effect by oncogenic Ha-Ras-induced activation of the mitogen-activated protein kinase signaling pathway in human prostate cancer. (2000)

Elevated expression of transforming growth factor (TGF)-beta1 has been implicated in prostate tumorigenesis despite its growth-inhibitory effect on normal epithelial and carcinoma cells of the prostate. In this study, we identified that G1-to-S transition of the cell cycle is stimulated by TGF-beta1 in the prostate cancer cell line TSU-Pr1. No mutation of signal mediators, including Smads, and induction of PAI-1 transcription indicated that the TGF-beta1 signaling cascade is functionally intact in this cell line. Whereas pharmacological inhibitors of various mitogenic signaling pathways showed no effects, blockade of the mitogen-activated protein kinase (MAPK) pathway by the MAPK kinase 1 inhibitor PD98059 restored the growth inhibitory role of TGF-beta1 in TSU-Pr1, which carries an oncogenic mutation in Ha-Ras (V12). Moreover, expression of antisense Ha-Ras or dominant negative Raf-1 abrogated the mitogenic effect of TGF-beta1 in TSU-Pr1, and the TGF-beta1 inhibition of DU145 was switched to stimulation by V12Ha-Ras transfection. Whereas the negative growth regulation by TGF-beta1 was completely inhibited by dominant negative Smad2, Smad3, or Smad4, its mitogenic effect was not affected, suggesting that this action is Smad-independent. Interestingly, whereas the TGF-beta1-mediated up-regulation of p15INK4B and p21WAF1 transcription was abolished in TSU-Pr1 and V12Ha-Ras-transfected DU145, inhibition of the Ras/MAPK pathway restored the TGF-beta1 induction of these genes. Taken together, our data suggest that prostate carcinomas with the Ras/MAPK pathway activation might have a selective growth advantage by autocrine TGF-beta1 production.
Successful treatment of herpes labialis with topical acyclovir. (1983)

A double blind, placebo controlled trial of 5% acyclovir cream, applied topically five times a day for five days, was carried out in 49 patients with recurrent herpes labialis. These patients had a total of 74 episodes, 34 of which were treated with the 5% acyclovir cream and 40 with matching placebo. First episodes and all episodes treated with acyclovir cream had significantly shorter times to formation of ulcer or crust and to complete healing (p less than 0.05 for all variables). The duration of all symptoms and proportion of patients developing itching was also reduced by acyclovir cream in first episodes, though the difference was not significant. When the patient started treatment early in the course of a first episode acyclovir cream significantly reduced the percentage of lesions progressing beyond the papular stage (p less than 0.05). Acyclovir cream is well tolerated and effective for the treatment of recurrent herpes labialis.
Synthesis and electrochemical characterization of polyamic acid containing oligoaniline and triphenylamine (2017)

Electroactive fluorescent polyamic acid containing oligoaniline and triphenylamine has been designed and synthesized. The resulting polymer exhibits reversible electroactivity, unique electrochromic performance and exciting electrofluorochromic behavior. Additional Supporting Information may be found in the online version of this article. Supporting Information 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.
The effect of flow on technetium-99m-teboroxime (SQ30217) and thallium-201 extraction and retention in rabbit heart. (1991)

In order to evaluate the accuracy of blood flow measurement, the single-pass extraction, retention/wash-out and relative net uptake of 99mTc-teboroxime (SQ30217) and 201Tl were evaluated and compared in 20 isolated blood-perfused rabbit hearts at coronary flow rates ranging from 0.49 to 2.85 ml/g wet wt min-1. The average peak extraction of 201Tl (+/- s.d.) (0.67 +/- 0.11) marginally exceeded that of SQ30217 (0.62 +/- 0.12) (p = 0.06). Flow significantly affected the maximum net extraction of 201Tl and the 40-min net extractions of both 201Tl and SQ30217. Unexpectedly, the rate of 201Tl myocardial washout was significantly faster (p less than 0.05) than SQ30217 washout at all flow rates evaluated. Increasing coronary blood flow rate was associated with a more rapid clearance of both tracers from the myocardium (p less than 0.05 for both comparisons). The slope of the linear correlations between relative net SQ30217 uptake versus flow and relative net 201Tl uptake versus flow were found to be similar for up to 10 min after isotope injection. These data were interpreted to indicate that: 1. Thallium-201 might be slightly better extracted than SQ30217. 2. SQ30217 is cleared more slowly from the myocardium. 3. Thallium-201 and SQ30217 appear to be comparable tracers of myocardial perfusion for up to 10 min after injection under the single-pass conditions currently employed. 4. Additional studies are needed to clarify myocardial SQ30217 kinetics.
Assessment of Gene Regulation by Bone Morphogenetic Protein 2 in Human Marrow Stromal Cells Using Gene Array Technology (2001)

Marrow stromal cells can differentiate into osteoblasts, adipocytes, myoblasts, and chondrocytes. Bone morphogenetic protein 2 (BMP-2) is a potent stimulator of osteoblastic differentiation, and identification of the genes regulated by BMP-2 in these cells should provide insight into the mechanism(s) of osteoblastic differentiation. Thus, we used a conditionally immortalized human marrow stromal cell line (hMS) and a gene expression microarray containing probes for a total of 6800 genes to compare gene expression in control and BMP-2-treated cultures. A total of 51 genes showed a consistent change in messenger RNA (mRNA) frequency between two repeat experiments. Seventeen of these genes showed a change in expression of at least 3-fold in BMP-2-treated cultures over control cultures. These included nuclear binding factors (10 genes), signal transduction pathway genes (2 genes), molecular transport (1 gene), cell surface proteins (2 genes) and growth factors (2 genes). Of particular interest were four of the nuclear binding factor genes ID-1, ID-2, ID-3, and ID-4. These encode dominant negative helix-loop-helix (dnHLH) proteins that lack the nuclear binding domain of the basic HLH proteins and thus have no transcriptional activity. They have been implicated in blocking both myogenesis and adipogenesis. Other transcription factors up-regulated at least 3-fold by BMP-2 included Dlx-2, HES-1, STAT1, and JunB. The changes in these nuclear binding factor mRNA levels were confirmed by real-time reverse-transcriptase-polymerase chain reaction (RT-PCR). A further three transcription factors, core binding factor beta (CBFbeta), AREB6, and SOX4, showed changes in expression of between 2- and 3-fold with BMP-2 treatment. In summary, we have used a gene chip microarray to identify a number of BMP-2 responsive genes in hMS cells. Thus, these studies provide potential candidate genes that may induce osteoblastic differentiation or, in the case of the ID proteins, block differentiation along alternate pathways.