gebhart/patrepeval huggingface dataset:
Sonothrombolysis in acute ischemic stroke for patients ineligible for rt-PA (2005)

The authors studied the effect of transcranial ultrasound on patients with acute middle cerebral artery occlusion and contraindications for thrombolysis. Fifteen consecutive subjects were randomized for insonation over 1 hour or for inclusion in a control group. By day 4, recanalization and neurologic improvement occurred more frequently in the target group. Ultrasound-induced acceleration of clot dissolution may be an option for patients with contraindications for recombinant tissue plasminogen activator.
Thermally Responsive Vesicles and Their Structural “Locking” through Polyelectrolyte Complex Formation (2006)

Hot spots: Thermally responsive AB diblock copolymers that self-assemble into vesicles at higher temperatures were prepared (see picture). These vesicles can be cross-linked by adding an oppositely charged polyelectrolyte. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2006/z602168_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.
T cell receptor γδ repertoire is skewed in cerebrospinal fluid of multiple sclerosis patients: molecular and functional analyses of antigen‐reactive γδ clones (1995)

To study the relevance of gamma delta T cells in multiple sclerosis (MS) we analyzed the T cell receptor (TCR) gamma delta repertoire and the antigen reactivity of gamma delta clones isolated from cerebrospinal fluid (CSF). In T cell cultures derived from CSF we found an increased percentage of V delta 1+ cells as compared to peripheral blood of the same donors. Phenotypic analysis of cells from MS CSF with V gamma- and V delta-specific monoclonal antibodies (mAb) showed that the V delta 1 chain is most frequently associated with gamma chains belonging to the V gamma 1 family. Sequence analysis of TCR genes revealed heterogeneity of junctional regions in both delta and gamma genes indicating polyclonal expansion. gamma delta clones were established and some recognized glioblastoma, astrocytoma or monocytic cell lines. Stimulation with these targets induced serine esterase release and lymphokine expression characteristic of the TH0-like phenotype. Remarkably, these tumor-reactive gamma delta cells were not detected in the peripheral blood using PCR oligotyping, but were found in other CSF lines independently established from the same MS patient. Altogether, these results demonstrate that in the CSF there is a skewed TCR gamma delta repertoire and suggest that gamma delta cells reacting against brain-derived antigens might have been locally expanded.
The<i>N</i>-<i>tert</i>-Butylcarbamoyl Directed Metalation Group for the Regiospecific Synthesis of 2-Substituted Pyrroles and Indoles (1991)

The N-tert-butylcarbamoyl serves as a useful, readily removable (LiOH/MeOH/THF) new directed metalation group for the synthesis of 2-substituted pyrroles and indoles.
DITPA prevents the blunted contraction-frequency relationship in myocytes from infarcted hearts (2000)

Loss of the positive force-frequency relationship is a characteristic finding in failing hearts. The mechanisms of this change are not well understood. Myocardial infarction (MI) was induced in rabbits to produce left ventricular (LV) dysfunction. Beginning 1 day after MI, a subgroup of rabbits received diiodothyropropionic acid (DITPA) (3.75 mg x kg(-1) x day(-1) sc) for 3 wk. We measured contractions, Ca(2+) transients, action potentials, and sarcoplasmic reticulum (SR) Ca(2+) content at different stimulation rates in single LV myocytes. The shortening-frequency relationship was markedly flattened in MI myocytes compared with control myocytes. In addition, Ca(2+) transients, action potentials, and contractions were prolonged. Myocytes from DITPA-treated MI rabbits had preserved inotropic responses to increased stimulation rate and normal duration of action potentials and Ca(2+) transients. SR Ca(2+) content increased significantly when stimulation rate was increased from 0.5 to 2.0 Hz in control myocytes but did not change significantly in MI myocytes. Myocytes from DITPA-treated MI rabbits had a greater frequency-dependent increase in SR Ca(2+) content compared with the untreated MI rabbits. Thus single myocytes from infarcted rabbit hearts have frequency-dependent abnormalities of contractility, Ca(2+) cycling, and action potential repolarization. The flattened contraction-frequency relationship can be partially explained by an attenuation of the normal enhancement of SR Ca(2+) content that occurs when stimulation rate is increased. Chronic DITPA administration after MI largely prevents the development of these abnormalities.
Association between levels of serum ferritin and bone mineral density in Korean premenopausal and postmenopausal women: KNHANES 2008-2010. (2014)

Background 
As women go through menopause, serum estrogen decreases and ferritin increases. Decreased serum estrogen is well known to cause detrimental effects on bone health; however, data on the associations of serum ferritin with BMD before and after menopause are still lacking. Therefore, this study aimed to investigate the association between serum ferritin levels and BMD in premenopausal and postmenopausal Korean women.


Methods 
This study was performed using data from the 2008–2010 Korean National Health and Nutrition Examination Survey, including 7300 women (4229 premenopausal and 3071 postmenopausal). BMD was measured using dual X-ray absorptiometry at the femur and the lumbar spine, and serum ferritin levels were measured by chemiluminescent immunoassay.


Results 
Median serum ferritin levels in postmenopausal women were higher than those in premenopausal women despite the same age ranges. Serum ferritin levels were only significantly correlated with BMD on the lumbar spine (β = −0.189, p-value = 0.005) in premenopausal women after adjusting confounding factors. Additionally, BMD on the lumbar spine had tended to decrease as serum ferritin quartiles increase (P for trend = 0.035) in premenopausal women after adjusting confounding factors. On the other hand, there were no significant associations between serum ferritin levels and BMD on the total femur and, femur neck in premenopausal women, and BMD on the total femur, femur neck, and lumbar spine in postmenopausal women.


Conclusion 
Increased serum ferritin levels were significantly associated with BMD in premenopausal women, particularly on the lumbar spine, but not in postmenopausal women.
Feedforward current control of boost-derived single-phase PFC converters (2005)

The recently developed input current feedforward control method for boost single-phase PFC converters is generalized and applied to other, boost-derived topologies. The generalized method is applicable even when additional resonant and active clamping circuits are added to achieve soft switching in the converter power stage. The feedforward duty ratio signal in the generalized method is calculated based on the off-state voltage of the main switch instead of the output voltage as in the existing method. Measuring the switch off-state voltage requires a sample-and-hold circuit, which is best accomplished by using digital control. Applications of the proposed method to a transformer-coupled SEPIC converter with active clamping and its digital implementation are presented in detail. Numerical simulation and experimental results are reported to demonstrate the benefits of the proposed method and its suitability for different applications.
Terrain rendering in frostbite using procedural shader splatting (2007)

Article Share on Terrain rendering in frostbite using procedural shader splatting Author: Johan Andersson View Profile Authors Info & Claims SIGGRAPH '07: ACM SIGGRAPH 2007 coursesAugust 2007 Pages 38–58https://doi.org/10.1145/1281500.1281668Online:05 August 2007Publication History 11citation101DownloadsMetricsTotal Citations11Total Downloads101Last 12 Months31Last 6 weeks2 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 Alerts New Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access
La comprensión lectora, ¡esa gran incomprendida! (2008)

En las últimas décadas, el avance en los estudios de metodología de lenguasextranjeras (LE) ha experimentado un espectacular avance, y aunque todavía estamosmuy lejos de haber encontrado la forma ideal de didáctica, los progresos indican quevamos por buen camino. Las metodologías comunicativas y el enfoque por tareas handado a las destrezas en el aula de LE un protagonismo relevante y justificado, pues cadadestreza cubre una serie de procesos de aprendizaje y necesidades del aprendiente.
Monolithically Integrated FM Front-End with New Diode Tuning Concept (1975)

The synthesis of a new bipolar technology for the monolithic integration of GHz-transistors and adapted circuit techniques has been achieved. This makes the realisation of integrated circuits for FM front-ends possible.
Color From Black And White (2005)

Color constancy can be achieved by analyzing the chromatic aberration in an image. Chromatic aberration spatially separates light of different wavelengths and this allows the spectral power distribution of the light to be extracted. This is more information about the light than is registered by the cones of the human visual system or by a color television camera; and, using it, we show how color constancy, the separation of reflectance from illumination, can be achieved. As examples, we consider grey-level images of (a) a colored dot under unknown illumination, and (b) an edge between two differently colored regions under unknown illumination. Our first result is that in principle we can determine completely the spectral power distribution of the reflected light from the dot or, in the case of the color edge, the difference in the spectral power distributions of the light from the two regions. By employing a finite-dimensional linear model of illumination and surface reflectance, we obtain our second result, which is that the spectrum of the reflected light can be uniquely decomposed into a component due to the illuminant and another component due to the surface reflectance. This decomposition provides the complete spectral reflectance function, and hence color, of the surface as well as the spectral power distribution of the illuminant. Up to the limit of the accuracy of the finite-dimensional model, this effectively solves the color constancy problem.
Regional Cerebral Blood Flow Estimated by <sup>133</sup> Xenon Inhalation (1975)

A method is described for estimating the clearance rate and fractional blood flow of the fast (gray matter) compartment of the brain from the first ten minutes of 122 XE clearance curves, following a one-minute inhalation. Computer-simulated data were used to test the adequacy of the two-compartmental model employed, and to evaluate the stability of the parameters in the presence of random noise. A comparison was made between this approach and the previously reported three-compartmental analysis. Regional cerbral blood flow data were obtained on 48 young control subjects and 20 elderly demented patients. Hemispheral, regional, and test-retest variations were determined, as well as differences between the groups.
Calibration and Validation of Wearable Monitors (2011)

New methods of calibration now use "pattern recognition" approaches to train the algorithms on various activities, and they provide estimates of energy expenditure that are much better than those previously available with the single-regression approach. Once a method of predicting energy expenditure has been established, the next step is to examine its predictive accuracy by cross-validating it in other populations. In this article, we attempt to summarize the best practices for calibration and validation of wearable physical activity monitors. Finally, we conclude with some ideas for future research ideas that will move the field of physical activity measurement forward.
Electrical characteristics of new LDD poly-Si TFT structure tolerant to process misalignment (1999)

A new lightly doped drain (LDD) poly-Si TFT structure having symmetrical electrical characteristics independent of the process induced misalignment is described in this paper. Based on the experimental results, we have established that there is no difference between the bi-directional I/sub D/-V/sub G/ characteristics, and a low leakage current, comparable to a conventional LDD poly-Si TFT, has been maintained for this new poly-Si TFT. The maximum ON/OFF current ratio of about 1×10/sup 8/ is obtained for the LDD length of 1.0 μm. In addition, the kink effect in the output characteristics has been remarkably improved in the new TFTs in comparison to the conventional non-LDD single- or dual-gate TFTs.
Length Dependent Helix−Coil Transition Kinetics of Nine Alanine-Based Peptides (2004)

It is well-known that end caps and the peptide length can dramatically influence the thermodynamics of the helix-coil transition. However, their roles in determining the kinetics of the helix-coil transition have not been studied extensively and are less well understood. Kinetic Ising models and sequential kinetic models involving barrier crossing via diffusion all predict that the helix formation time depends monotonically on the peptide length with the relaxation time increasing with respect to increasing chain length. Here, we have studied the helix-coil transition kinetics of a series of Ala-based <i>α</i>-helical peptides of different length (19-39 residues), with and without end caps, using time-resolved infrared spectroscopy coupled with laser-induced temperature jump (<i>T</i>-jump) initiation method. The helical content of these peptides was kinetically monitored by probing the amide carbonyl stretching frequencies (i.e., the amide I' band) of the peptide backbone. We found that the relaxation rates for peptides with efficient end caps are more rapid than those of the corresponding peptides without good end caps. These results indicate that efficient end-capping sequences can not only stabilize preexisting helices but also promote helix formation through initiation. Furthermore, we found that the relaxation times of these peptides, following a <i>T</i>-jump of 1-11 °C, show rather complex behaviors as a function of the peptide length, in disagreement with theoretical predications. Theses results are not readily explained by theories in which Ala is taken to have a single helical propensity (<i>s</i>). However, recent studies have suggested that <i>s</i> depends on chain length; when this factor is considered, the mean first-passage times of the coil-to-helix transition show similar dependence on the peptide length as those observed experimentally.
SPLICING OF PRECAST PRESTRESSED CONCRETE PILES: PART I-REVIEW AND PERFORMANCE OF SPLICES (1974)

Effective splicing of prestressed concrete piles can reduce or eliminate many problems associated with the installation of long piles. Proper splicing methods eliminate the need to predict precise pile lengths, and allow extensions of piles when necessary. This report presents the results of an investigation into existing methods presently used in the splicing of prestressed concrete piles. The first part of this report constitutes a review and evaluation on splicing methods developed and used in several areas of the world. The second part of the report, to be published in the next issue of the PCI JOURNAL, describes actual tests and analyses of one of the splices described in this article.
Long‐lasting potentiation of synaptic transmission in the dentate area of the unanaesthetized rabbit following stimulation of the perforant path (1973)

1. Potential changes evoked by stimulation of the perforant path have been recorded in the dentate area of the hippocampal formation in chronically prepared unanaesthetized rabbits. 2. Components attributed to excitatory synaptic current flow and to action potentials in the granule cell population were distinguishable, with characteristics largely the same as in anaesthetized rabbits. 3. Stimulation at 15/sec for several seconds usually led to the granule cells being more effectively activated by the individual stimuli of the train (‘frequency potentiation’). Single stimuli then commonly produced multiple discharges in the granule cell population. 4. After single periods of stimulation at 15/sec for 15–20 sec there was on 26% of the occasions (41% of those on which there was good frequency potentiation) a long‐lasting potentiation of the responses to subsequent stimuli, lasting from 1 hr to 3 days. 5. After a further 20% of the periods of repetitive stimulation there was a shorter lasting potentiation, and after 8% there was a short lasting depression. 6. The potentiation, when present, was characterized by some or all of the following changes: increases in the amplitudes of the synaptic wave and population spike, reduction in the latency of the population spike, and reductions in the variability of the characteristics of the population spike. 7. During the long‐lasting potentiation there was an increase in the excitability of the post‐synaptic cells and, on some but not all occasions, an increase in the extracellular current flow produced directly by synaptic action.
Recovery tools in Mental Health Services: Are they adaptable for Deaf people? (2013)

The concept of recovery has emerged as a significant paradigm in the field of public mental health services1. A number of recovery tools have been developed and are increasingly being used to support recovery-focused practice and person-centred care. Fundamentally these recovery tools are rooted in a personal recovery model and founded on a philosophy of individual self-determination. It is a misconception by many that the use of sign language is a mixture of signs and gestures created from spoken language. In fact sign language is a language with its own vocabulary and grammatical structure. Yet it appears that Deaf mental health service users and staff are expected to use existing recovery tools that use the concepts and language created for a hearing society with English as a common shared language. This paper will explain the concept of recovery and discuss this in relation to Deaf service users. The use of recovery tools within Deaf in-patient and community Services around the UK, Europe and Australia will be explored through discussion of the use of a questionnaire sent to known Deaf mental health services. The results indicated that the term “Recovery” within Deaf mental health services and recovery tools were relatively unknown outside of the UK. Recovery tools appear to be rarely used in Deaf services, especially those in the community. The overall consensus of respondents was the need for a recovery tool that is specific to the Deaf community. However, consultation is required with Deaf service users and their involvement in developing such a tool is crucial.
Linear electro-optic effect in β-BaB2O4 (1988)

The linear electro-optic (EO) coefficients of beta-barium borate (β-BaB2O4) have been measured. The clamped and unclamped values of ryyy and rc are ‖rTyyy‖ =2.5 pm/V, ‖rTc‖ =0.17 pm/V, ‖rSyyy‖=0.24rSxyz (KDP), and ‖rSc‖=0.013rSxyz (KDP). The magnitude of the EO coefficient is due mainly to the electronic nonlinearity.
Highly efficient c-band circularly polarized rectifying antenna array for wireless microwave power transmission (2003)

This paper reports a new circularly polarized (CP) high-gain, high-efficiency rectifying antenna (rectenna) array designed in a coplanar stripline (CPS) circuit. The array can maintain a constant dc output voltage regardless of its broadside orientation. The array is etched on Rogers Duroid 5870 substrate with /spl epsiv//sub r/=2.33 and 10 mil thickness. High-gain dual rhombic loop antennas and a reflecting plane are used in order to reduce the total number of rectenna elements necessary to cover a fixed area. Each antenna has a CP antenna gain of 11 dB and a better than 1 dB axial ratio fractional bandwidth of 4.7%. The single element rectenna achieves 81% RF-to-dc coversion efficiency at 5.71 GHz and uses a CPS band-reject filter (BRF) to suppress the reradiated harmonics by more than 19 dB. At 5.61 GHz, using an array loading of 150 /spl Omega/, a 3 /spl times/ 3 rectenna array produces 0.86 W of dc output power with an RF-to-dc conversion efficiency of 78% and an axial ratio of 0.25 dB for an incident CP power density of 7.6 mW/cm/sup 2/.
Trifluoroacetyl chloride for characterization of organic functional groups by fluorine-19 nuclear magnetic resonance spectrometry (1979)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTrifluoroacetyl chloride for characterization of organic functional groups by fluorine-19 nuclear magnetic resonance spectrometryP. Sleevi, T. E. Glass, and H. C. DornCite this: Anal. Chem. 1979, 51, 12, 1931–1934Publication Date (Print):October 1, 1979Publication History Published online1 May 2002Published inissue 1 October 1979https://doi.org/10.1021/ac50048a009RIGHTS & PERMISSIONSArticle Views362Altmetric-Citations43LEARN 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 InReddit PDF (488 KB) Get e-Alerts Get e-Alerts
Enhanced Gestalt Theory Guided Web Page Segmentation for Mobile Browsing (2009)

This paper proposes a novel Web page segmentation method for mobile browsing, aiming to break a Web page into visually and semantically coherent units fitted to the limited screen size of mobile devices. We intend to simulate human’s perceptive process guided by four general laws in Gestalt theory, namely: proximity, similarity, closure and simplicity. We also present an application of adapting Web pages to mobile terminals based on segmentation. Experimental results show that the proposed method is efficient and can greatly improve segmentation accuracy.