gebhart/patrepeval huggingface dataset:
Web semântica: introdução, conceitos e abordagens (2012)

O projeto da Internet mais inteligente foi elaborado ha mais de dez anos, diversos padroes e modelos foram criados neste intervalo, no entanto sua implementacao ainda nao e uma realidade efetiva, pois a rede atual e muito diferente da estrutura proposta no projeto e marcar as paginas com as tecnicas apresentadas exige esforco e, para muitos sistemas que ja estao funcionamento, podem gerar custos inesperados. Alem disto, ha um alto grau de complexidade nesta tarefa que poderia ser eliminado se ferramentas automatizadas cuidassem da maior parte do trabalho. Neste contexto, o presente trabalho apresenta os conceitos mais importantes desta abordagem e um resumo dos padroes e modelos propostos, por exemplo, pelo W3C, pois para que a Web Semântica se concretize e preciso que os dados sejam acompanhados de descricoes baseadas nos padroes e a partir destes codigos, os computadores vao identificar o que cada elemento representa, ou o quao e relevante para uma eventual necessidade. Sendo assim, o foco e mostrar que a Web Semântica tem muito mais a ver com linguagens de programacao, aplicativos web e banco de dados, ou seja, e uma tecnologia diretamente ligada a infraestrutura, portanto o que se espera ver, na verdade ocorre no dinamismo com que os desenvolvedores podem enriquecer seus sites e integrar melhor as informacoes de diferentes paginas.
Mold Metabolites. VIII. Contribution to the Elucidation of the Structure of Helvolic Acid<sup>1</sup> (1956)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMold Metabolites. VIII. Contribution to the Elucidation of the Structure of Helvolic Acid1Donald J. Cram and Norman L. AllingerCite this: J. Am. Chem. Soc. 1956, 78, 20, 5275–5284Publication Date (Print):October 1, 1956Publication History Published online1 May 2002Published inissue 1 October 1956https://pubs.acs.org/doi/10.1021/ja01601a034https://doi.org/10.1021/ja01601a034research-articleACS PublicationsRequest reuse permissionsArticle Views76Altmetric-Citations16LEARN 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
Cobalt (II) Chloride Catalysed Addition of Alcohols on Vinyl Ethers: A Convenient Synthesis of Mixed Acetals (1989)

Abstract Hydroxyl compounds readily add to Vinyl ethers in presence of a catalytic amount of Cobalt (II) Chloride, to give high yields of mixed acetals.
Effect of Bluetooth interference on OFDM systems (2004)

Bluetooth systems produce unintentional interference in orthogonal frequency division multiplexing (OFDM) systems using the industry, science and medical (ISM) band. The performance of OFDM systems in the presence of Bluetooth interference is numerically analysed in Rayleigh fading channels in addition to AWGN.
515 million years of structural colour (2000)

Structures that cause colour or provide antireflection have been found in both living and extinct animals in a diversity of forms, including mirror-reflective and diffractive devices. An overview of this diversity is presented here, and behavioural and evolutionary implications are introduced.
Elemental imaging mass spectrometry of thin sections of tissues and analysis of brain proteins in gels by laser ablation inductively coupled plasma mass spectrometry (2007)

Abstract Laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) has become established as a very efficient and sensitive trace and surface analytical technique in the life sciences. We applied LA‐ICP‐MS to produce images for investigating the spatial element distribution as well as the layered structures and inhomogeneities in thin tissue sections (e.g., human and rat brain tissues). In order to quantify the analytical data, matrix‐matched laboratory standards were prepared and analyzed by applying the optimized experimental parameters using LA‐ICP‐MS. Furthermore, the possibility of the nanometer‐scale analysis of elements on sample surfaces by near‐field LA‐ICP‐MS on soft matter (e.g., on 2D gels and biological samples) will be discussed briefly. This novel technique opens up a new challenging path for future applications in the quantitative imaging of elements in life sciences and nanotechnologies. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
A New Low Energy Electron Microscope (1998)

Low energy electron microscopy (LEEM) has developed into one of the premier techniques for in situ studies of surface dynamical processes, such as epitaxial growth, phase transitions, chemisorption and strain relaxation phenomena. Over the last three years we have designed and constructed a new LEEM instrument, aimed at improved resolution, improved diffraction capabilities and greater ease of operation compared to present instruments.
Recovery of Natural Antioxidants from Spent Coffee Grounds (2013)

Spent coffee grounds (SCG) were extracted with an environmentally friendly procedure and analyzed to evaluate the recovery of relevant natural antioxidants for use as nutritional supplements, foods, or cosmetic additives. SCG were characterized in terms of their total phenolic content by the Folin-Ciocalteu procedure and antioxidant activity by the DPPH scavenging assay. Flavonoid content was also determined by a colorimetric assay. The total phenolic content was strongly correlated with the DPPH scavenging activity, suggesting that phenolic compounds are mainly responsible for the antioxidant activity of SCG. An UHPLC-PDA-TOF-MS system was used to separate, identify, and quantify phenolic and nonphenolic compounds in the SCG extracts. Important amounts of chlorogenic acids (CGA) and related compounds as well as caffeine (CAF) evidenced the high potential of SCG, a waste material that is widely available in the world, as a source of natural phenolic antioxidants.
Pilot-scale evaluation of reburning for cyclone-boiler NOx control. Final report, May 1987-April 1990 (1990)

There are currently no commercially-demonstrated combustion modification techniques for cyclone boilers which reduce NOx emissions. The emerging reburning technology offers cyclone boiler owners a promising alternative to expensive flue gas cleanup techniques for NOx emission reduction. Reburning involves the injection of a supplemental fuel (natural gas, oil, or coal) into the main furnace in order to produce locally reducing stoichiometric conditions that convert NOx produced in the main combustion zone to molecular nitrogen, thereby reducing overall NOx emissions. The report presents the encouraging pilot-scale results obtained using natural gas, fuel oil, and pulverized coal (PC) as reburning fuels. At a reburning zone stoichiometry of 0.9, 67% NOx reduction for gas and oil reburning and 57% for coal reburning were achieved. Flue gas recirculation (FGR) was introduced at the reburn burners, and improved mixing and NOx reduction. FGR was more effective with PC reburning. Carbon monoxide (CO) emissions levels were low (less than 30 ppm) throughout the various optimum test conditions. Although the carbon content of the fly ash increased, the overall combustion efficiencies were insignificantly lower for all the reburning fuels. Furnace exit gas temperatures (FEGTs) increased by less than 50 F during reburning operation. Capital costs for reburn technologymore » on a 200-MW cyclone-fired unit can range from about $22/kW (gas) to $41/kW (coal). Ten-year levelized incremental busbar costs were sensitive to assumed reburning fuel prices. Lower projections were 1.7 mills/kWh (coal), 2.3 mills/kWh (gas), and 3.3 mills/kWh (oil).« less
2. Indo-Tibetica. Vol.III: I Templi del Tibet Occidentale e il Loro Simbolismo Artistico. Parte I: Spiti e Kunavar. By Giuseppe Tucci. Reale Accademia d'Italia: Studi e Documenti, 1. 10 × 7, pp. 219, pls. 92 (3 in colour), plans 2. Roma: Reale Accademia d'Italia, 1935. L. 150. (1936)

2. Indo-Tibetica. Vol.III: I Templi del Tibet Occidentale e il Loro Simbolismo Artistico. Parte I: Spiti e Kunavar. By Giuseppe Tucci. Reale Accademia d'Italia: Studi e Documenti, 1. 10 × 7, pp. 219, pls. 92 (3 in colour), plans 2. Roma: Reale Accademia d'Italia, 1935. L. 150. - Volume 68 Issue 2
Synthesis and Group 4 Complexes of Tris(pyrrolyl-α-methyl)amine (2003)

The tetradentate, trianionic ligand tris(pyrrolyl-alpha-methyl)amine (H(3)tpa) is available in 84% yield in a single step by a triple Mannich reaction involving 3 equiv of pyrrole, 3 equiv of formaldehyde, and ammonium chloride. The new ligand is readily placed on titanium by transamination on Ti(NMe(2))(4), which generates Ti(NMe(2))(tpa) (1) in 73% yield. Treating 1 with 1 equiv of 1,3-dimethyl-2-iminoimidazolidine (H-imd) in toluene provided a rare example of a titanium 2-iminoimidazolidinide, which displays some interesting structural features. Of note is the Ti-N(imd) distance of 1.768(2) A, a typical Ti-N double to triple bond distance. Reaction of Zr(NMe(2))(4) with H(3)tpa gave a complex of variable composition, probably varying in the amount of labile dimethylamine retained. However, stable discreet compounds were available by addition of THF, pyridine, or 4,4'-di-tert-butyl-2,2'-bipyridine (Bu(t)bpy) to in situ generated Zr(NMe(2))(NHMe(2))(x)(tpa). Three chloro zirconium complexes were generated using three different strategies. Treating Zr(tpa)(NMe(2))(Bu(t)bpy) (5) with ClSiMe(3) afforded Zr(tpa)(Cl)(Bu(t)bpy) (6) in 92% yield. Reaction of Li(3)tpa with ZrCl(4)(THF)(2) in THF gave a 72% yield of ZrCl(tpa)(THF)(2) (7). In addition, treatment of ZrCl(NMe(2))(3) with H(3)tpa cleanly generated ZrCl(NHMe(2))(2)(tpa) (8) in 95% yield. An organometallic zirconium complex was generated on treatment of 6 with LiCtbd1;CPh; alkynyl Zr(Ctbd1;CPh)(tpa)(Bu(t)bpy) (9) was isolated in 62% yield. 1, Ti(imd)(tpa) (2), 6, and 9 were characterized by X-ray diffraction.
CRISPR/Cas9 Editing of the Mutant Huntingtin Allele In Vitro and In Vivo (2017)

Huntington disease (HD) is a fatal dominantly inherited neurodegenerative disorder caused by CAG repeat expansion (>36 repeats) within the first exon of the huntingtin gene. Although mutant huntingtin (mHTT) is ubiquitously expressed, the brain shows robust and early degeneration. Current RNA interference-based approaches for lowering mHTT expression have been efficacious in mouse models, but basal mutant protein levels are still detected. To fully mitigate expression from the mutant allele, we hypothesize that allele-specific genome editing can occur via prevalent promoter-resident SNPs in heterozygosity with the mutant allele. Here, we identified SNPs that either cause or destroy PAM motifs critical for CRISPR-selective editing of one allele versus the other in cells from HD patients and in a transgenic HD model harboring the human allele.
At Davos, Bankers Want the Good Old Days Back (2011)

There was a period of remorse and apology for banks;that period needs to be over.Thus Bob Diamond,the chief executive officer of Barclays
Argyrophilic Grain Disease Is a Sporadic 4-Repeat Tauopathy (2002)

Argyrophilic grain disease (AGD) was first reported as an adult-onset dementia, but recent studies have emphasized personality change, emotional imbalance, and memory problems as clinical features of AGD. AGD is characterized by spindle- or comma-shaped argyrophilic grains in the neuropil of entorhinal cortex, hippocampus, and amygdala. Immunohistochemistry with monoclonal antibodies specific to tau isoforms with four (4R) or three (3R) repeats in the microtubule-binding domain showed immunostaining of grains with 4R, but not 3R, tau antibodies, suggesting that AGD was a 4R tauopathy. The tau isoform composition of AGD was confirmed with densitometric analysis of Western blots of sarkosyl-insoluble tau from the medial temporal lobe of AGD brains with a range of concurrent neurofibrillary pathology and compared with Alzheimer controls. The 4R/3R ratio was 1 or less for Alzheimer disease; the 4R/3R ratio was more than 1 for AGD, decreasing with increasing neurofibrillary pathology and demonstrating that insoluble tau in AGD was enriched in 4R tau. The frequency of the extended tau haplotype was not different in AGD compared to other sporadic 4R tauopathies, progressive supranuclear palsy (PSP) and corticobasal degeneration (CBD). Furthermore, AGD occurred in PSP and CBD more frequently than in dementia controls, including Alzheimer disease. These results suggest that AGD, PSP and CBD are 4R tauopathies that share common pathologic, biochemical, and genetic characteristics.
Reconfigurations within resonating communities of brain regions following TMS reveal different scales of processing (2020)

An overarching goal of neuroscience research is to understand how heterogeneous neuronal ensembles cohere into networks of coordinated activity to support cognition. To investigate how local activity harmonizes with global signals, we measured electroencephalography (EEG) while single pulses of transcranial magnetic stimulation (TMS) perturbed occipital and parietal cortices. We estimate the rapid network reconfigurations in dynamic network communities within specific frequency bands of the EEG, and characterize two distinct features of network reconfiguration, flexibility and allegiance, among spatially distributed neural sources following TMS. Using distance from the stimulation site to infer local and global effects, we find that alpha activity (8-12 Hz) reflects concurrent local and global effects on network dynamics. Pairwise allegiance of brain regions to communities on average increased near the stimulation site, whereas TMS-induced changes to flexibility were generally invariant to distance and stimulation site. In contrast, communities within the beta (13-20 Hz) band demonstrated a high level of spatial specificity, particularly within a cluster comprising paracentral areas. Together, these results suggest that focal magnetic neurostimulation to distinct cortical sites can help identify both local and global effects on brain network dynamics, and highlight fundamental differences in the manifestation of network reconfigurations within alpha and beta frequency bands.
Distribution of slanted write field for perpendicular recording heads with shielded pole (2005)

The write field distribution for a perpendicular writer was investigated using finite-element (FE) analysis. The slanted write fields due to shield pieces at the trailing edge and the leading edge of the pole tip, and the side shields are analyzed. The analysis shows that the use of the shielded pole leads to a change in the saturation levels in the main pole tip, affecting the write field distribution. The effects of the side shield and other design parameters on the write field in cross-track direction are discussed.
Finding stable system designs (1994)

article Free AccessFinding stable system designs: a reverse simulation technique Authors: Rosemary H. Wild FUNdamentals: Systems for Learning, Tucson, AZ FUNdamentals: Systems for Learning, Tucson, AZView Profile , Joseph J. Pignatiello Texas A&M Univ., College Station Texas A&M Univ., College StationView Profile Authors Info & Claims Communications of the ACMVolume 37Issue 10Oct. 1994 pp 87–98https://doi.org/10.1145/194313.194405Published:01 October 1994Publication History 10citation288DownloadsMetricsTotal Citations10Total Downloads288Last 12 Months18Last 6 weeks1 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF
Studies on the Syntheses of Cyclic Nitrogenous Compounds from Amino Acids. (VII) (1958)

Acyl derivatives of ethyl dl-3-(2-piperidyl) propionate and dl-3-(2-pyrrolidinyl)-propionate were dry distilled with soda lime from which 3-substituted Δ2-dehydroindo-lizidines and Δ2-dehydropyrrolizidines were obtained in around 95% yield. Catalytic reduction of these bases with palladium-carbon easily afforded the corresponding indolizidine and pyrrolizidine derivatives. The Δ2-dehydro bases obtained by dry distillation were extremely labile, coloring immediately in air but their picrates and perchlorates were stable. Reaction of the aqueous solution of the perchlorates of 3-methyl-Δ2-dehydroindolizidine and Δ2-dehydropyrrolizidine with potassium cyanide afforded 3-cyano-3-methyl-indolizidine and -pyrrolizidine derivatives which formed respective picrates. Recrystallization of the picrates from ethanol resulted in genration of hydrogen cyanide and the substances reverted to the original 3-methyl-Δ2-dehydroindolizidine and -pyrrolizidine picrates. These reactions are the same as those of the Δ3-dehydroquinolizidines described in the preceding paper and are clearly confirmed by infrared absorption spectra.
Mediation by Corticotropin Releasing Factor (CRF) of Adenohypophysial Hormone Secretion (1986)

Macrophage polarization refers to how macrophages have been activated at a given point in space and time. Polarization is not fixed, as macrophages are sufficiently plastic to integrate multiple signals, such as those from microbes, damaged tissues, and ...Read More
Effect of Ligand Density on the Spectral, Physical, and Biological Characteristics of CdSe/ZnS Quantum Dots (2008)

Chemical modification of the surface of CdSe/ZnS quantum dots (QDs) with small molecules or functional ligands often alters the characteristics of these particles. For instance, dopamine conjugation quenches the fluorescence of the QDs, which is a property that can be exploited for sensing applications if the conjugates are taken up into living cells. However, different sizes and/or preparations of mercaptocarboxylic acid solubilized QDs show very different properties when incubated with cells. It is unknown what physical parameters determine a QDs ability to interact with a cell surface, be endocytosed, escape from endosomes, and/or enter the nucleus. In this study, we examine the surface chemistry of QD-dopamine conjugates and present an optimized method for tracking the attachment of small biomolecules to the surface. It is found that the fluorescence intensity, surface charge, colloidal stability, and biological interactions of the QDs vary as a function of the density of dopamine on the surface. Successful targeting of QD-dopamine to dopamine receptor positive PC12 cells correlates with greater homogeneity of particle thiol layer, and a minimum number of ligands required for specific association can be estimated. These results will enable users to develop methods for screening QD conjugates for biological activity before proceeding to experiments with cell lines and animals.
High-Capacity Communications from Martian Distances (2007)

High capacity communications from Martian distances, required for the envisioned human exploration and desirable for data-intensive science missions, is challenging. NASA s Deep Space Network currently requires large antennas to close RF telemetry links operating at kilobit-per-second data rates. To accommodate higher rate communications, NASA is considering means to achieve greater effective aperture at its ground stations. This report, focusing on the return link from Mars to Earth, demonstrates that without excessive research and development expenditure, operational Mars-to-Earth RF communications systems can achieve data rates up to 1 Gbps by 2020 using technology that today is at technology readiness level (TRL) 4-5. Advanced technology to achieve the needed increase in spacecraft power and transmit aperture is feasible at an only moderate increase in spacecraft mass and technology risk. In addition, both power-efficient, near-capacity coding and modulation and greater aperture from the DSN array will be required. In accord with these results and conclusions, investment in the following technologies is recommended:(1) lightweight (1 kg/sq m density) spacecraft antenna systems; (2) a Ka-band receive ground array consisting of relatively small (10-15 m) antennas; (3) coding and modulation technology that reduces spacecraft power by at least 3 dB; and (4) efficient generation of kilowatt-level spacecraft RF power.
A System Architecture for Software-Defined Industrial Internet of Things (2015)

Wireless sensor networks have been a driving force of the Industrial Internet of Things (IIoT) advancement in the process control and manufacturing industry. The emergence of IIoT opens great potential for the ubiquitous field device connectivity and manageability with an integrated and standardized architecture from low- level device operations to high-level data-centric application interactions. This technological development requires software definability in the key architectural elements of IIoT, including wireless field devices, IIoT gateways, network infrastructure, and IIoT sensor cloud services. In this paper, a novel software-defined IIoT (SD- IIoT) is proposed in order to solve essential challenges in a holistic IIoT system, such as reliability, security, timeliness scalability, and quality of service (QoS). A new IIoT system architecture is proposed based on the latest networking technologies such as WirelessHART, WebSocket, IETF constrained application protocol (CoAP) and software-defined networking (SDN). A new scheme based on CoAP and SDN is proposed to solve the QoS issues. Computer experiments in a case study are implemented to show the effectiveness of the proposed system architecture.
Research on the Formation Mechanism and Regional Characteristics of China's Real Estate Economic Bubble under the New Economic Normal (2021)

Under the new economic normal, with the acceleration of industrialization and urbanization, China's real estate industry was once extremely active, which actively promoted economic and social development. However, due to its rapid growth, the negative impact is spreading, which has become a major hidden danger of adjusting the structure to promote harmony. The existence of real estate economic bubble seriously affects the sustainable development of economy. The government should strengthen the research on the formation mechanism and characteristics of real estate economic bubble in order to further strengthen macro-control and promote the development of real estate economy. Therefore, the causes and regional characteristics of China's real estate economic bubble should be studied and analyzed, and relevant government departments should take necessary measures to strengthen macro-control, so as to promote the sound and rapid development of the real estate economy. This paper studies the formation mechanism of China's real estate economic bubble under the new economic normal, and analyzes its regional characteristics to ensure the healthy and stable development of the real estate industry and the market macro economy.