gebhart/patrepeval huggingface dataset:
Optical absorption and luminescence investigations of the precipitated phases of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Eu</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>in NaCl and KCl single crystals (1980)

A detailed study of the optical absorption and luminescence spectra associated with the precipitated phases of divalent europium in NaCl and KCl single crystals is reported. For the system NaCl-Eu${\mathrm{Cl}}_{2}$, three fluorescence bands peaking at 410, 439, and 485 nm were observed in crystals which were stored for six years at room temperature, without any previous heat treatment. The corresponding optical-absorption spectrum of these crystals consists of two broad bands peaking at 260 and 349 nm with a cubic crystalline field splitting 10Dq=9809 ${\mathrm{cm}}^{\ensuremath{-}1}$. After quenching the crystals from 600\ifmmode^\circ\else\textdegree\fi{}C, only one emission band peaking at 427 nm was observed and the corresponding optical-absorption spectrum consists also of two broad bands but now peaking at 240 and 347 nm with a 10Dq splitting of 12 849 ${\mathrm{cm}}^{\ensuremath{-}1}$. The emission band at 410 nm in the well-aged crystals was associated with the stable dihalide phase Eu${\mathrm{Cl}}_{2}$, while those peaking at 439 and 485 nm were ascribed to the metastable precipitated Eu${\mathrm{Cl}}_{2}$-like plate zones parallel to {111} and {310} planes of the matrix lattice, respectively. For the system KCl-Eu${\mathrm{Cl}}_{2}$, only one emission band peaking at 427 nm was observed in crystals stored at room temperature for five years, without any previous heat treatment. The corresponding optical-absorption spectrum of these well-aged crystals consists of two broad bands peaking at 244 and 349 nm with a 10Dq value of 12 331 ${\mathrm{cm}}^{\ensuremath{-}1}$. After quenching the samples, an emission band at 419 nm was observed and the corresponding optical-absorption spectrum was very similar to that observed before the quenching, although its 10Dq splitting was smaller (11 997 ${\mathrm{cm}}^{\ensuremath{-}1}$). In this case, the band peaking at 427 nm, observed in the well-aged crystals, has been tentatively associated with the metastable Suzuki phase of divalent europium in the potassium chloride host. The change in the absorption, excitation, and emission spectra associated with the different precipitated phases of ${\mathrm{Eu}}^{2+}$ in NaCl and KCl as a function of the annealing temperature is also reported.
Separation of Hydrogen Peroxide from Organic Hydroperoxides (1953)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSeparation of Hydrogen Peroxide from Organic HydroperoxidesW. M. MacNevin and P. F. UroneCite this: Anal. Chem. 1953, 25, 11, 1760–1761Publication Date (Print):November 17, 1953Publication History Published online1 May 2002Published inissue 17 November 1953https://doi.org/10.1021/ac60083a052RIGHTS & PERMISSIONSArticle Views337Altmetric-Citations62LEARN 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 (258 KB) Get e-Alerts Get e-Alerts
Increased Antifungal Activity of <i>Trichoderma harzianum</i> Transformants That Overexpress a 33-kDa Chitinase (1999)

ABSTRACT Transformants of the biocontrol agent Trichoderma harzianum strain CECT 2413 that overexpressed a 33-kDa chitinase (Chit33) were obtained and characterized. Strain CECT 2413 was cotransformed with the amdS gene and its own chit33 gene under the control of the pki constitutive promoter from T. reesei. Southern blotting indicated that the chit33 gene was integrated ectopically, mostly in tandem. Some transformants showed the same restriction pattern, indicating preferable sites of integration. There was no correlation between the number of integrated copies and the level of expression of the chit33 gene in the transformants. When grown in glucose, the extracellular chitinase activity of the transformants was up to 200-fold greater than that of the wild type, whereas in chitin, the activity of both the transformants and the wild type was similar. Under both conditions, the transformants were more effective in inhibiting the growth of Rhizoctonia solani as compared with the wild type. Similar results were obtained when culture supernatants from the transformants and the wild type were tested against R. solani.
<title>Color filter array recovery using a threshold-based variable number of gradients</title> (1999)

The increase in the popularity of digital cameras over the past few years has provided motivation to improve all elements of the digital photography signal chain. As a contribution towards this common goal, we present a new CFA recovery algorithm, which recovers full-color images from single-detector digital color cameras more accurately than previously published techniques. This CFA recovery algorithm uses a threshold-based variable number of gradients. In order to recover missing color information at each pixel, we measure the gradient in eight directions based on a 5 X 5 neighborhood surrounding that pixel. Each gradient value is defined as a linear combination of the absolute differences of the like-colored pixels in this neighborhood. We then consider the entire set of eight gradients to determine a threshold of acceptable gradients. For all of the gradients that pass the threshold test, we use color components from the corresponding areas of the 5 X 5 neighborhoods to determine the missing color values. We test our CFA recovery algorithm against bilinear interpolation and a single- gradient method. Using a set of standard test images, we show that our CFA recovery algorithm reduces the MSE by over 50 percent compared to conventional color recovery algorithms. In addition, the resolution test we developed also show that the new CFA recovery algorithm increases the resolution by over 15 percent. The subjective qualities of test images recovered using the new algorithm also show noticeable improvement.
Virtual Screening to Identify Novel Antagonists for the G Protein-Coupled NK<sub>3</sub>Receptor (2010)

The NK(3) subtype of tachykinin receptor is a G protein-coupled receptor that is a potential therapeutic target for several neurological diseases, including schizophrenia. In this study, we have screened compound databases for novel NK(3) receptor antagonists using a virtual screening protocol of similarity analysis. The lead compound for this study was the potent NK(3) antagonist talnetant. Compounds of the quinoline type found in the virtual screen were additionally evaluated in a comparative molecular field analysis model to predict activity a priori to testing in vitro. Selected members of this latter set were tested for their ability to inhibit ligand binding to the NK(3) receptor as well as to inhibit senktide-induced calcium responses in cells expressing the human NK(3) receptor. Two novel compounds were identified that inhibited NK(3) receptor agonist binding, with potencies in the nM range and antagonized NK(3) receptor-mediated increases in intracellular calcium. These results demonstrate the utility of similarity analysis in identifying novel antagonist ligands for neuropeptide receptors.
PP.13.09 (2015)

Objective: Circulating bone marrow–derived endothelial progenitor cells (EPCs) correlates with endothelial function and cardiovascular risk. The cytokine erythropoietin(EPO) are thought to stimulates EPCs. Patients with end stage renal disease (ESRD) on hemodialysis (HD) have markedly decreased EPC counts although they are treated with erythropoietin. We hypothesized that the decreased number of circulating EPCs might associate with erythropoietin resistance index(ERI) in patients with ESRD on HD. Design and method: We quantified EPCs in blood samples from 70 patients with ESRD on HD. Circulating EPCs were counted by flow cytometry as the number ofCD45lowCD34 + VEGFR2 + cells. The ERI was calculated by dividing the weekly erythropoietin dose per kilogram of weight (ug/wk.kg) by the Hb level (g/dL). Results: The number of circulating EPCs at baseline ranged from 1 to 350cells/200ul, with a mean ± SD of 26.0 ± 48.2 cells/200uL. There was no significant association with erythropoietin dose and EPC counts. The EPCs count of lowest, low-medium, high-medium and higher EPI quartile were 43.6 ± 50.2, 11.1 ± 4.0, 14.8 ± 19.9, and 16.9 ± 12.7 cells/200uL, respectively. Patients with lowest EPI quartile showed significantly higher EPC counts. Conclusions: Administration of EPO may not always increase the number of circulating EPCs in ESRD patients on HD. The resistance to erythropoietin may associate with decreased circulation EPC counts.
Tutorial review—Optical chemical sensors: transduction and signal processing (1993)

The development of optical chemical sensors is a rapidly growing technology, and it combines the advantages of optical fibres with the selectivity and specificity of chemical transduction systems. The chemical transducer is the heart of such sensors and considerable effort is being made in their development. The analyte concentrations are determined through the measurement of chemically encoded optical signals. The optical signal processing is carried out using standard components and instrumentation to produce quality and meaningful data. This paper reviews the principles of chemical transduction and the signal processing systems that are used in conjunction with optical chemical sensors.
Despeckle Filtering in Medical Ultrasound Imaging (2009)

Abstract In this paper, we implemented Wiener filter, anisotropic diffusion filter, k-distribution based adaptive filter and wavelet filter to de-speckle in medical ultrasound images. The Wiener filter can improve the image qualities well and simulated power spectrum of speckle can be applied on many situations. The Anisotropic diffusion filter can also de-speckle well as long as we choose reasonable parameters, and it doesn’t need extra information of noise pattern. The K-distribution based adaptive filter can improve the image quality, the method is easy to implement and the statistics is easy to estimate and characterize. The wavelet filter is not suitable for removing the speckle in ultrasound images. Keywords: image processing, image restoration, wiener filter, image de-noisng I. I NTRODUCTION The medical Ultrasound B-scan (brightness scan) echo imaging is acquired by summation of the echo signals from ultrasound scatterers in the ultrasound beam range. The scatterers are from structures, tissue interfaces and tissue microstructures etc. in the body, these scatterers are locally correlated. And the coherent summation of signals
[3H]Bosentan Binding to Human Coronary Artery (1995)

The binding characteristics and localization of bosentan, an orally active endothelin-1 (ET-1) antagonist, were studied on sections of human coronary artery by in vitro autoradiography. Competition studies were performed to determine the ability of bosentan to prevent [125I]ET-1 binding to the coronary vasculature. The effects of bosentan on ET-1-induced contraction of the coronary artery were also studied in vitro. [3H]Bosentan bound to the tunica media of the human coronary artery. Unlabeled bosentan prevented [125I]ET-1 binding to this vessel in a concentration-dependent manner, and functional studies indicated that bosentan antagonizes ET-1--induced constriction. These data show that bosentan is able to reduce ET-1 binding to the human coronary artery and ET-1 constrictor effects in vitro. Bosentan is an orally active ET-1 antagonist, and these results suggest that this compound might be used to block the effects of locally released ET-1 in pathologic conditions, such as atherosclerosis, angina, and myocardial ischemia.
Cooperative Competitors: Local, State, and National Archival Associations (1991)

Archivists' professional development is critically dependent on a diverse system of archival organizations. Through meetings, publications, and committee work, these organizations provide members with education, experience, and legitimatization. Regional archival organizations are enviably positioned to fulfill archivists' educational and socialization needs. Their middle position, however, requires special attention to ensure that cooperation and competition are used productively.
Cerium-based M<sub>4</sub>L<sub>4</sub> tetrahedrons containing hydrogen bond groups as functional molecular flasks for selective reaction prompting (2014)

Metal–organic tetrahedrons with abundant hydrogen bond groups work as “molecular flasks” to prompt Knoevenagel condensation and cyanosilylation reactions.
Inhibition of 5′-nucleotidase from Ehrlich ascites-tumour cells by nucleoside triphosphates (1969)

1. 5'-Nucleotidase activity was obtained in a soluble form after treatment of a particulate fraction from Ehrlich ascites-tumour cells with deoxycholate. The relative rates of hydrolysis of 6-thioinosine 5'-phosphate, UMP, AMP, CMP, GMP, IMP, xanthosine monophosphate, thymidine monophosphate and 2',3'-AMP were 180, 129, 100, 93, 83, 79, 46, 41 and 3 respectively. 2. Values found for the Michaelis constant were: AMP, 67+/-12mum; IMP, 111+/-8mum; GMP, 93mum. 3. ATP and thymidine triphosphate were competitive inhibitors of AMP hydrolysis (inhibitor constants 0.4 and 4.8mum respectively); UTP, GTP and CTP were mixed competitive and non-competitive inhibitors. Thymidine triphosphate was a competitive inhibitor of IMP hydrolysis (inhibitor constant 14.4mum) and ATP, UTP and GTP showed mixed competitive and non-competitive inhibition. 4. ATP, thymidine triphosphate, UTP, GTP and CTP did not completely inhibit hydrolysis of AMP, IMP and UMP; the concentrations of ATP required to inhibit AMP and IMP hydrolysis by 50% were 12 and 230mum respectively. 5. Non-hyperbolic curves relating activity to UMP concentration were obtained in the presence and absence of triphosphates. 6. After fractionation on Sephadex G-200 columns a single peak of 5'-nucleotidase activity (particle weight 120000-125000) was obtained with AMP, IMP and GMP as substrates. UMP hydrolysis was catalysed by enzyme in this peak and in two slower peaks corresponding to apparent particle weights of 32000 and 16000; a single component (particle weight 120000), reacting with UMP and insensitive to UTP inhibition, was obtained when the column was eluted with buffer containing 1mm-UMP. 7. The possible significance of the results in the regulation of tumour-cell 5'-nucleotidase is discussed.
Evaluation of the donor liver for living donor liver transplantation (2003)

Key points 1. Accurate assessment of the donor liver is an important component of the living donor liver evaluation and is critical to ensure a successful outcome for both donor and recipient. 2. Liver biochemistry tests, viral hepatitis serological tests, tests to exclude chronic liver disease, and volumetric computed tomographic or magnetic resonance (MR) imaging of the liver are performed routinely as part of the donor evaluation. 3. Liver biopsy should be a standard component of the donor evaluation in all donors, with the possible exception of those with a body mass index less than 25 who have normal liver test and abdominal imaging study results and no risk factors for chronic liver disease or hepatic steatosis. 4. The maximum acceptable percentage of steatosis in the donor liver is unknown, but most centers use an upper limit of 10% to 30%. 5. A graft-recipient body weight ratio of at least 0.8% provides the recipient with adequate hepatic mass in most situations. 6. Anatomic variants in donor biliary and hepatic vascular anatomy are common. 7. Evaluation of donor vascular anatomy varies among centers and includes MR or computed tomographic angiography and hepatic angiography. 8. Evaluation of biliary anatomy is performed most commonly using intraoperative cholangiography. Some centers use MR cholangiography or endoscopic retrograde cholangiopancreatography in selected situations.
Thin-Film Diffusion Barriers for Metal-Semiconductor Contacts, (1987)

Abstract : The notion of a diffusion barrier is discussed as it applies to thin films, and to metal semiconductor contacts in particular. The electrical requirements on the barrier material are easily met; those of the thermodynamic stability of the barrier and the low atomic diffusivity in the barrier are not. The critical influence of the deposition process on the latter property is pointed out. Several different ways to solve the problem are discussed by examples.
Dietary Supplements (2005)

Surgeons should be aware that many of their patients are taking dietary supplements that may alter coagulation. Because most patients will not readily volunteer this information, specific steps should be taken to obtain it prior to more extensive surgical procedures.
Toric intraocular lens vs. peripheral corneal relaxing inci- sions to correct astigmatism in eyes undergoing cataract surgery. (2014)

The efficacy and stability of Toric-IOL and PCRIs were equal in low astigmatic patients. Toric-IOL achieved an enhanced effect over PCRIs in higher astigmatic patients. PCRIs had the more refractive regression than Toric-IOL in 6 months.
Role of digital therapeutics and the changing future of healthcare (2020)

With healthcare becoming digital, patients today are more empowered than ever before. As a result, digital health solutions have become the need of the hour to keep up with an increasing number of empowered patients participating in their own treatment decisions. Digital health encompasses various platforms and systems that apply technological solutions to enhance healthcare delivery. Digital therapeutics (DTx) is one such category of digital health solutions that provides evidence-based software-driven therapeutic interventions for the prevention and management of a medical disorder or disease. This review aims to provide a comprehensive overview of DTx, its functions and applications in healthcare, and associated regulatory aspects, among others.
Anomaly Detection Based Secure In-Network Aggregation for Wireless Sensor Networks (2012)

Secure in-network aggregation in wireless sensor networks (WSNs) is a necessary and challenging task. In this paper, we first propose integration of system monitoring modules and intrusion detection modules in the context of WSNs. We propose an extended Kalman filter (EKF) based mechanism to detect false injected data. Specifically, by monitoring behaviors of its neighbors and using EKF to predict their future states (actual in-network aggregated values), each node aims at setting up a normal range of the neighbors' future transmitted aggregated values. This task is challenging because of potential high packet loss rate, harsh environment, and sensing uncertainty. We illustrate how to use EKF to address this challenge to create effective local detection mechanisms. Using different aggregation functions (average, sum, max, and min), we present how to obtain a theoretical threshold. We further apply an algorithm of combining cumulative summation and generalized likelihood ratio to increase detection sensitivity. To overcome the limitations of local detection mechanisms, we illustrate how our proposed local detection approaches work together with the system monitoring module to differentiate between malicious events and emergency events. We conduct experiments and simulations to evaluate local detection mechanisms under different aggregation functions.
Evaluation of uncertainty in dynamic, reduced-order power system models (2000)

Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
Fracture analysis using borehole Stoneley wave transmission and reflection data (1996)

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1996Fracture analysis using borehole Stoneley wave transmission and reflection dataAuthors: Xiaoming TangCharles R. JacksonXiaoming TangWestern Atlas Logging Services and Charles R. JacksonWestern Atlas Logging Serviceshttps://doi.org/10.1190/1.1826448 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink: https://doi.org/10.1190/1.1826448FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 1996ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 1996 Pages: 2106 publication data© 1996 Copyright © 1996 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 10 Feb 2005 CITATION INFORMATION Xiaoming Tang and Charles R. Jackson, (1996), "Fracture analysis using borehole Stoneley wave transmission and reflection data," SEG Technical Program Expanded Abstracts : 166-169. https://doi.org/10.1190/1.1826448 Plain-Language Summary PDF DownloadLoading ...
An Experimental Performance Evaluation of the Orientation Accuracy of Four Nine-Axis MEMS Motion Sensors (2017)

MEMS (Micro-Electro-Mechanical Systems) inertial motion sensors have greatly improved the intelligence of wearable devices, sports fitness equipment, and consumer electronics. To avoid the disadvantages of each discrete inertial sensor, the tendency is to combine and fuse several different types of inertial motion sensors; thus, consumer-grade inertial motion sensors even have the same performance with the industrial-grade sensors. This study presents an overview of multi-axis sensor fusion algorithms and their applications. Furthermore, three typical consumer-grade AHRS (attitude and heading reference system) were verified compared with an industrial-grade sensor module (MTi-300), and three-axis orientation outputs of these sensors were compared. Static and dynamic experiment results show that MTi-300 has the best orientation accuracy (static error=0.05°, dynamic error=0.5°) compared to the other three sensor modules. Moreover, BNO055 has a better dynamic performance while compared with the other two consumer-grade motion sensors.
The influence of tibial tray design on the wear of fixed-bearing total knee replacements (2008)

Debris-induced osteolysis due to surface wear is a potential long-term problem in total knee replacements (TKRs). Wear between the tibial tray and ultra-high molecular weight polyethylene insert is thought to contribute to the wear. This study investigated the influence of tibial tray design on the wear of fixed-bearing TKRs. Specifically, this study investigated the influence of the material's surface finish and design characteristics of the locking mechanism of the tibial tray on the wear in fixed-bearing knees for both cruciate-retaining (CR) and posterior-stabilized designs. A new fixed-bearing tibial tray design using Co-Cr and with an improved locking mechanism significantly reduced polyethylene wear from 22.8 +/- 6.0 mm3 per 10(6) cycles to 15.9 +/- 2.9 mm3 per 10(6) cycles compared with a previous titanium alloy tray with a CR design. The wear rates were similar to those of a fixed-bearing insert clamped into a tibial tray, suggesting that the decrease in wear was due to a reduction in backside wear. There was no significant difference between the wear rates of a cruciate-retaining design and a posterior-stabilized design under the two kinematic conditions tested.