gebhart/patrepeval huggingface dataset:
Quantifying C<sub>10</sub>−C<sub>13</sub> Polychloroalkanes in Environmental Samples by High-Resolution Gas Chromatography/Electron Capture Negative Ion High-Resolution Mass Spectrometry (1997)

A method for quantifying C10-C13 polychloroalkanes (PCAs) in environmental samples by high-resolution gas chromatography/electron capture negative ion high-resolution mass spectrometry in the selected ion monitoring (SIM) mode is presented. The molecular compositions of commercial PCAs and of PCA-containing extracts from environmental samples are first determined by monitoring [M - Cl]- ions of specific m/z value corresponding to formula groups present and by assuming that the integrated ion signals are proportional to molar concentration weighted by the number of chlorine atoms in the formula group. For quantitative measurement, one specific m/z peak is selected for each analyte and its SIM response is integrated. The integrated SIM responses have a linear dependence upon amount of PCA injected over the range 0.5-500 ng. An analytical protocol is then described. High-resolution (∼12 000 resolving power) mass spectrometry is shown to be desirable to eliminate self-interferences between PCAs at low resolving power (∼1000) and potential interferences from technical chlordane, toxaphene, PCBs, and other organochlorine pesticides. Extraction recoveries of PCAs from fish averaged >80%. The analytical detection limit is ∼60 pg of injected PCA, at a signal-to-noise ratio of 4:1, while the method detection limit was 23 ng/g. As illustrations of the application of the technique to "real world" problems, PCA levels in biota and sediment samples from the mouth of the Detroit River (MI) are reported to be in the 0.3-1.2 μg/g range.
First- and Second-Order Properties of Spatiotemporal Point Processes in the Space-Time and Frequency Domains. (2001)

Point processes are common in many physical applications found in engineering and biology. These processes can be observed in one-dimension as a time series or two-dimensions as a spatial point pattern with extensive amounts of literature devoted to their analyses. However, if the observed process is a hybrid of spatial and temporal point process, very few practical methods exist. In such cases, practitioners often remove the temporal component and analyze the spatial dependencies. This marginal spatial analysis may lead to misleading results if time is an important factor in the process. In this dissertation we extend the current analysis of spatial point patterns to include a temporal dimension. First- and second-order intensity measures for analyzing spatiotemporal point patterns are explicitly defined. Estimation of first-order intensities are examined using 3-dimensional smoothing techniques. Conditions for weak stationarity are provided so that subsequent second-order analysis can be conducted. We consider second-order analysis of spatiotemporal point patterns first in the space-time domain through an extension of Ripley’s K-function. An alternative analysis is given in the frequency domain though construction of a spatiotemporal periodogram. The methodology provided is tested through simulation of spatiotemporal point patterns and by analysis of a real data set. The biological application concerns the estimation of the homerange of groups of the endangered red-cockaded woodpecker in the Fort Bragg area of North Carolina. Monthly or bimonthly point patterns of the bird distribution are analyzed and integrated over a 23 month period.
Preparation and reactions of 5-vinyltetrazole (1969)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and reactions of 5-vinyltetrazoleC. Arnold Jr. and D. N. ThatcherCite this: J. Org. Chem. 1969, 34, 4, 1141–1142Publication Date (Print):April 1, 1969Publication History Published online1 May 2002Published inissue 1 April 1969https://pubs.acs.org/doi/10.1021/jo01256a087https://doi.org/10.1021/jo01256a087research-articleACS PublicationsRequest reuse permissionsArticle Views436Altmetric-Citations66LEARN 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
Symmetric second order edge elements for triangles and tetrahedra (1999)

A new type of second order edge elements for simplexes (triangles and tetrahedra) is proposed. The element is geometrically symmetric and the shape functions are orthogonal to each other in the integrals of the tangential components on edges. The number of nodes and edges are 14 and 24 in a tetrahedral element. The proposed elements are validated by eigenmode calculations in a cavity using newly developed method to solve eigenvalue problems with large matrices. Highly accurate eigenvalues are calculated using the elements.
Spread of Electrical Activity Through the Wall of the Ventricle (1953)

Multipolar recording technics have been employed to record the spread of excitation through the wall of the ventricle. The construction of isochronous planes in a block of tissue aids in visualizing the direction of spread. The results give direct support to the idea of fast endocardial spread followed by syncytial spread through the wall at a slower rate. No evidence is found that the impulse spreads through the individual cardiac muscle bundles.
Production of multiply charged fullerene and carbon cluster beams by a 14.5 GHz ECR ion source (2002)

We report our first results on the study of normal and endohedral fullerene plasmas and beams produced by a 14.5 GHz electron cyclotron resonance (ECR) ion source (ECRIS). A mixed plasma of mainly N, N2, C, C2, and C60 was produced in the plasma chamber. Formation of caged nitrogens in the fullerene balls requires a careful, unusual tuning of the 14.5 GHz ECRIS. We deposited macroscopic quantities of the solid solution of N@C60 in C60 within the ECRIS. The N@C60/C60 ratio measured off-line using electron-spin-resonance spectroscopy may exceed typical values using conventional, non-ECR techniques. High intensities of C60Q+ ions (Q=1–5) were recorded in the extracted beam spectra. The highest measured C60+ beam current was 410 nA at 700 V extraction voltage. The method may be applied to produce carbon cluster beams from fullerenes, as well. We produced CnQ+ ions (n=2–15, Q=1,2) with intensities of 10–100 nA.
Studies on the Synthetic Analgesics. XVII. Syntheses of 2-(N-<I>tert</I>-Aminoalkylacylamino) thiophene (1962)

Acyl-derivatives of thienylaminoethyl (or propyl) amines have been synthesized. Some of the compounds tested for analgesic activity showed the almost equal as morphine.
Novel electrochemical reactions related to electrodeposition and electrochemical synthesis (2003)

Novel electrochemical reactions in molten salts related to electrodeposition and electrochemical synthesis are reviewed to show their usefulness and possibilities in producing functional materials. Surface nitriding of various metals and stainless steels is possible by the use of anodic reaction of nitride ion (N3-) in LiCl-KCl-Li3N melts. Electrochemical hydrogen absorption/desorption reaction occurs in molten salts containing hydride ion (H-). Electrochemical implantation and displantation can be applied to form transition metal-rare earth metal alloys in LiCl-KCl melts containing rare earth chlorides. As non-conventional electrochemical reactions, direct electrochemical reduction of SiO2 to Si, discharge electrolysis to form metal oxide particles and electrochemical plantation of Zr on ceramics are described.
EVALUATION OF DIFFERENT METHODS TO ISOLATE COD (GADUS MORHUA) MUSCLE MYOSIN (2001)

Four methods developed for fish muscle myosin isolation were evaluated for their potential to isolate myosin from cod white muscle. A slightly modified version of the method by Martone and coworkers (Martone et al. 1986) gave outstanding myosin purity (97.3%) as determined by SDS-PAGE and densito-metric analysis without employing time consuming chromalographic separation, while the other three methods tested gave myosin purity ranging from 33.4–76.75% with substantial contamination of actin and tropomyosin. The method of Manone and coworkers (1986) with more complete muscle tissue disintegration and prolonged extraction steps than used in the original work is therefore highly recommended far researchers interested in studying functionality of a pure cod myosin preparation.
Effect of CrRu underlayer on the magnetic, recording, and thermal stability characteristics of CoCrPtTa thin film media (2000)

The effects of CrRu underlayers on the grain size, lattice matching, magnetic, recording and thermal stability characteristics for CoCrPtTa thin film media are presented, CrRu/sub 10/ and CrRu/sub 20/ underlayers produced about 800-960 Oe higher coercivity compared to media with a Cr underlayer. At 300 kfci recording density the CoCrPtTa/CrRu media has about 10-15% lower media noise and about 1-1.5 dB higher SNR compared to the similar media with Cr underlayer. X-ray diffraction data suggest somewhat better lattice matching between the CoCrPtTa/CrRu media due to the addition of Ru to the Cr underlayer compared to CoCrPtTa/Cr media. The CoCrPtTa/CrRu media has an average grain size of 12 nm in comparison to the average grain size of 15 nm for the CoCrPtTa/Cr media. The thin film media with CrRu/sub 10/ underlayer has smaller grain size but similar thermal stability performance compared to Cr underlayer.
Rapid two-stage arterial switch operation. Evaluation of left ventricular systolic mechanics late after an acute pressure overload stimulus in infancy. (1994)

Myocardial contractility is lower after the two-stage ASO than after a primary repair. Severe or progressive dysfunction was not seen. A very high peak rate of hypertrophy and severe LV dysfunction after banding predict a greater reduction in late contractility.
Encoding Shaky Videos by Integrating Efficient Video Stabilization (2018)

This paper presents a novel video coding method by integrating video stabilization for shaky videos. By reusing the stabilized motion of feature points and geometric transformations, a better predictor can be established to replace the original motion vectors in the motion estimation stage of video coding. Then, these motion vectors are optimized based on statistics of the residuals between the stabilization predictor and the standard one to improve the efficiency of motion search. As a result, our method brings much less computational cost to motion estimation than encoding the stabilized frames separately (e.g., 24% for the enhanced predictive zonal search algorithm, 17% for the unsymmetrical-cross multi-hexagon-grid search algorithm), while the Bjontegaard distortion (BD) bit rate and BDpeak signal-to-noise ratio still have the comparable performance with multiple quantization parameters. Specially, the implementation of our integrative system based on ×264 is very fast and of low latency, by which full HD videos can be simultaneously stabilized and encoded with more than 30 frames per second in the fastest mode, even on the mobile platform. The experiments on a variety of shaky videos demonstrate the potential of our method in terms of effectiveness and efficiency.
On flips in triangulations (2005)

We review a selection of results concerning edge flips in triangulations concentrating mainly on various aspects of the following problem: Given two different triangulations, how many edge flips are necessary and sufficient to transform one triangulation into another. We study the problem both from a combinatorial perspective (where only a combinatorial embedding of the triangulation is specified) and a geometric perspective (where the triangulation is embedded in the plane, vertices are points and edges are straight-line segments). We highlight both the similarities and differences of the two settings as well as outline some open problems.
Network synchronization (1985)

Network synchronization deals with the problem of distributing time and frequency among spatially remote locations. Network synchronization is an integral part of any large communication system, such as the telephone network. It also plays an important role in many diverse applications like navigation and position determination, computer communication, data gathering, control and command systems, and phased-array antennas. The purpose of this paper is to introduce the reader to the subject of network synchronization by organizing and presenting a tutorial of the theoretical work accomplished to date. Since the subject material is scattered, disconnected, and couched in different notations, the authors have long felt that it would be significant to organize the material and present the reader with an overview of the growth of the subject. A by-product of such a review should serve as an aid to set direction for future studies and research work. The paper begins by providing the classification of networks into plesiochronous (asynchronous) and synchronous. Further breakdown of this basic classification into a tree-structure hierarchy is presented. Since the time and frequency waveforms transmitted between nodes experience propagation delay, some form of ranging system application is usually required in order to compensate for these delays. Several delay compensation techniques are described and incorporated into a more detailed classification of the synchronization systems. This is then followed by presenting functional network models from which a generic and unified mathematical model is formulated. Network performance measures are defined and the mathematical model is used to characterize the synchronization behavior of the network in terms of these measures. Emphasis is placed on characterizing and understanding network stability, steady-state behavior, effects of clock phase noise, and channel thermal noise. The nonlinear behavior of synchronization systems is also explored. Numerous applications are pointed out and a rather complete list (unfortunately nonexhaustive) of the references is provided for the purpose of directing future research work.
Two germ-line mutations affecting the same nucleotide at codon 257 of p53 gene, a rare site for mutations. (1994)

International audience
Patient safety (2009)

Patient safety is a global challenge that requires knowledge and skills in multiple areas, including human factors and systems engineering. In this chapter, numerous conceptual approaches and methods for analyzing, preventing and mitigating medical e
Insulin and IGF-I induce pronounced hypertrophy of skeletal myofibers in tissue culture (1991)

Skeletal myofibers differentiated from primary avian myoblasts in tissue culture can be maintained in positive nitrogen balance in a defined serum-free medium for at least 6-7 days when embedded in a three-dimensional collagen gel matrix. Incubation of established myofiber cultures for 3-7 days with insulin (1 microM) or insulin-like growth factor I (IGF-I, 32 nM) stimulates both cell hyperplasia and myofiber hypertrophy. Mean myofiber diameter increases 71-98%. Insulin-like growth factor II stimulates cell hyperplasia but not myofiber hypertrophy. Cell growth results from a 42-62% increase in total protein synthesis and a 28-38% decrease in protein degradation. Myosin heavy-chain content increases 183-258% because of a 55% stimulation of myosin synthesis and 33-61% inhibition of degradation. Associated with myofiber hypertrophy is a 87-148% increase in the number of myofiber nuclei per unit myofiber length. The results indicate that insulin and IGF-I, but not IGF-II, can induce rapid myofiber hypertrophy in vitro, most likely by stimulating myoblast proliferation and/or fusion to established myofibers.
Comparison of guanabenz and clonidine in hypertensive patients (1980)

The antihypertensive and clinical effects of two centrally acting drugs, guanabenz and clonidine, were compared in a double-blind trial in 29 patients with established hypertension. After a 1-week baseline period and 2 weeks on placebo, patients received treatment with either guanabenz (mean dose 24 mg daily) or clonidine (mean dose 0.45 mg daily) alone for 8 weeks. Both drugs produced equivalent and highly significant (p < 0.001) reduction in systolic and diastolic blood pressures in the standing and supine positions. They also reduced significantly the standing and supine pulse rates. Normal orthostatic responses were maintained with both regimens. All but 1 patient in each group reported side-effects during active treatment, the most frequent being dry mouth and sedation with each drug. No laboratory or ECG abnormalities related to treatment were observed.
Transformation of mammary epithelial cells by regulators of cell polarity (2008)

Stony Brook University Libraries.\nSBU Graduate School in Genetics.\nLawrence Martin (Dean of Graduate School), Dr. Senthil Muthuswamy - Dissertation Advisor\nAssociate Professor, Cold Spring Harbor Laboratory, Dr. Howard Crawford – Chairperson of Defense\nAssistant Professor, Department of Pharmacological Sciences, Stony Brook\nUniversity, Dr. Yuri Lazebnik\nProfessor, Cold Spring Harbor Laboratory, Dr. Scott W. Lowe\nInvestigator, HHMI and Deputy Director, Cancer Center, Cold Spring Harbor\nLaboratory, Dr. Jonathan Chernoff\nSenior Member, Fox Chase Cancer Center.
Integrated SIW filter and microstrip antenna (2010)

A novel design of integrated Substrate Integrated Waveguide (SIW) filter and microstrip antenna is proposed. In the first step, the methodology consists of synthesising the subsystems combining a filter and an antenna using lumped lowpass prototype networks. To realise the concept, the filtering and radiating functions are combined using multilayer technology on a printed circuit board (PCB). The design is based on the circular cavity structure using TM<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">010</inf> mode for the filter and TM<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">110</inf> mode for the antenna. To prove the design technique, modes in the SIW filter and in the microstrip antenna are coupled by capacitive circular iris at the common ground plane. Good antenna characteristics such as gain and radiation pattern illustrate and prove the validity to integrate directly SIW and microstrip technology without the need to use any external matching circuit. This design provides an alternative solution for combining filter and antenna subsystems in the RF front end that is useful for wireless communications systems.
Architecture of the Ubiquitylation Module of the Yeast Ccr4-Not Complex (2015)

The Ccr4-Not complex regulates eukaryotic gene expression at multiple levels, including mRNA turnover, translational repression, and transcription. We have studied the ubiquitylation module of the yeast Ccr4-Not complex and addressed how E3 ligase binds cognate E2 and how it is tethered to the complex. The 2.8-Å resolution crystal structure of the N-terminal RING domain of Not4 in complex with Ubc4 shows the detailed interactions of this E3-E2 complex. The 3.6-Å resolution crystal structure of the C-terminal domain of the yeast Not4 in complex with the C-terminal domain of Not1 reveals how a largely extended region at the C-terminus of Not4 wraps around a HEAT-repeat region of Not1. This C-terminal region of Not4 is only partly conserved in metazoans, rationalizing its weaker Not1-binding properties. The structural and biochemical data show how Not1 can incorporate both the ubiquitylation module and the Not2-Not3/5 module concomitantly in the Ccr4-Not complex.
QoS control schemes for two-stage Ethernet passive optical access networks (2005)

Ethernet passive optical networks (EPONs) have emerged as the one of the most promising candidates for next-generation access networks. These new architectures couple low-cost optics with advanced edge electronics to offer vastly improved scalability over competing digital subscriber line and cable modem offerings. This paper proposes several novel architectural enhancements for EPON, which will help increase the viability of optical access over a broader range of subscriber access scenarios. Specifically, this paper proposes a two-stage EPON architecture that allows more end-users to share an optical line terminal link, and enables longer access reach/distances (beyond the usual 25 km distance). In addition, a new dynamic bandwidth allocation (DBA) algorithm is proposed to effectively allocate bandwidths between end users. This DBA algorithm can support differentiated services in a network with heterogeneous traffic. We conduct detailed simulation experiments to study the performance and validate the effectiveness of the proposed architecture and algorithms.
Reconstruction of the Tip of the Nose and Ala by Load Cycling of the Nasal Skin and Harnessing of Extra Skin (1986)

Reconstruction for loss of the nasal tip, adjoining columella, and left ala was largely accomplished by means of load cycling of the skin of the nose. The harnessing of the skin's viscoelastic properties can yield a fairly significant amount of extra skin, thus enabling a rather complicated problem to be dealt with by a relatively simple maneuver.
Decoding of High Rate Convolutional Codes Using the Dual Trellis (2010)

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> This paper deals with <emphasis emphasistype="boldital">a posteriori</emphasis> probability (APP) decoding of high-rate convolutional codes, using the dual code's trellis. After deriving the dual APP (DAPP) algorithm from the APP relation, its trellis-based implementation is addressed. The challenge involved in practical implementation of a DAPP decoder is then highlighted. Metric representation schemes similar to the log domain used for log-APP decoding are shown to be unattractive for DAPP decoding due to quantization requirements. After explaining the nature of the DAPP metrics, an arc hyperbolic tangent (AHT) scheme is proposed and its equivalent arithmetic operations derived. By using an efficient approximation, an addition is translated to an addition in the AHT domain. Efficient techniques for normalization and extrinsic log-likelihood ratio (LLR ) calculation are presented which reduce implementation complexity significantly. Simulation results with different high-rate codes are given to show that the AHT-DAPP decoder performs similarly to a log-APP decoder and at the same time performs better than a decoder for a punctured code. A fully fixed-point model of an AHT-DAPP decoder is shown to perform close to an optimum decoder. The decoding complexity of the log-APP and AHT-DAPP decoders are listed and compared for several rate-<emphasis emphasistype="italic"><formula formulatype="inline"> <tex Notation="TeX">$k/(k+1)$</tex></formula></emphasis> codes. It is shown that an AHT-DAPP decoder starts to be less complex from a code rate of <emphasis emphasistype="italic"><formula formulatype="inline"><tex Notation="TeX">$7/8$</tex> </formula></emphasis>. When compared against a max-log-APP decoder, the AHT-DAPP decoder is less complex at a code rate of <emphasis emphasistype="italic"><formula formulatype="inline"><tex Notation="TeX">$9/10$</tex></formula></emphasis> and above. </para>