gebhart/patrepeval huggingface dataset:
Synthesis and basic characteristics of polypropene-block-poly(ethene-co-propene) by modified stopped-flow polymerization with an MgCl2-supported Ziegler catalyst (1999)

A well-defined diblock copolymer, polypropene-block-poly(ethene-co-propene), was synthesized by modified stopped-flow polymerization with an MgCl2-supported Ziegler catalyst. The copolymer shows a unimodal gel permeation chromatography (GPC) elution curve without any material in the low molecular weight region. The molecular weight can be controlled by the polymerization time (ca. 0.1 to 0.2 s). Furthermore, the elution pattern by cross fractionation chromatography showed that the block copolymer eluted at each temperature region between 0°C to 120°C is composed of a uniform material. After extraction with heptane, the 13C NMR spectra showed that the signals from poly(ethene-co-propene) remain unchanged in the block copolymer but are absent in a corresponding polypropene/poly(ethene-co-propene) blend. The results of differential scanning calorimetry (DSC) and optical microscopic observation indicate not only the formation of a block copolymer with a chemical linkage between the polypropene block and the poly(ethene-co-propene) block, but also the regulation of the crystalline morphology in the block copolymer by changing the composition.
Cortical Networks Underlying Mechanisms of Time Perception (1998)

Precise timing of sensory information from multiple sensory streams is essential for many aspects of human perception and action. Animal and human research implicates the basal ganglia and cerebellar systems in timekeeping operations, but investigations into the role of the cerebral cortex have been limited. Individuals with focal left (LHD) or right hemisphere (RHD) lesions and control subjects performed two time perception tasks (duration perception, wherein the standard tone pair interval was 300 or 600 msec) and a frequency perception task, which controlled for deficits in time-independent processes shared by both tasks. When frequency perception deficits were controlled, only patients with RHD showed time perception deficits. Time perception competency was correlated with an independent test of switching nonspatial attention in the RHD but not the LHD patients, despite attention deficits in both groups. Lesion overlays of patients with RHD and impaired timing showed that 100% of the patients with anterior damage had lesions in premotor and prefrontal cortex (Brodmann areas 6, 8, 9, and 46), and 100% with posterior damage had lesions in the inferior parietal cortex. All LHD patients with normal timing had damage in these same regions, whereas few, if any, RHD patients with normal timing had similar lesion distributions. These results implicate a right hemisphere prefrontal-inferior parietal network in timing. Time-dependent attention and working memory functions may contribute to temporal perception deficits observed after damage to this network.
A Study about the Characteristics of Designs in John Galliano Collection - focusing on Christian Dior's Collection - (2009)

The main purpose of this study is to identify characteristics of shapes of John Galliano's Dior Collection as the chief executive designer of Christian Dior Maison during after he showed himself in Paris in 1990. This study was based on the analyses of John Galliano's design trends of his collections, the pictures of his works in Christian Dior's collection, real works, documents and fashion magazines, newspapers, mass media, internet sites and other visual materials. The study identified characteristics of shapes in Dior Collection until 07/08 F/W as the chief executive designer of Christian Dior Maison, and the design trends before his post-Paris period. Followings are the conclusions of the study. First, Galliano was open to any types of cultures as a liberalist, and also respectful to the tradition or principles. He led the fashion business with new trends by exploring both sides. Second, he succeeded in commercializing his avant-garde feature. Especially, His creativity changed the image of Christian Dior to younger and more casual one. Third, born in England and worked in French, he always took both English (Victorian Style) and French(Napoleon era, Femme Fatal style) sides, and showed excellent formulation that the times needed by combining topical Chinese, Japanese, Egyptian styles.
Comparative Study about the Removal of Smear Layer by Three Types of Laser Devices (1998)

These results show that the argon laser and Nd:YAG laser are useful to remove the smear layer and that the Er:YAG laser irradiation is the most effective to remove the smear layer on root canal walls.
Tools for building asynchronous servers to support speech and audio applications (1992)

Distributed client/server models are becoming increasingly prevalent in multimedia systems and advanced user interface design. A multimedia application, for example, may play and record audio, use speech recognition input, and use a window system for graphical I/O. The software architecture of such a system can be simplified if the application communicates to multiple servers (e.g., audio servers, recognition servers) that each manage different types of input and output. This paper describes tools for rapidly prototyping distributed asynchronous servers and applications, with an emphasis on supporting highly interactive user interfaces, temporal media, and multi-modal I/O.
Transgene expression in the coronary circulation: transcatheter gene delivery. (1994)

Therapeutic and research applications of direct gene transfer in the coronary vasculature are limited by varying transgene activity found in the vessel wall. It remains to be determined whether this is due to difficulties in delivery of recombinant DNA into the coronary arteries or if it relates to the state of recipient cells in the arterial wall. Accordingly, using a clinically applicable protocol, we have examined the time course of transgene (luciferase) expression in porcine coronary vasculature following transcatheter gene transfer (1 day to 4 weeks). Liposome-mediated transfection by means of a transcatheter approach resulted in detectable luciferase activity in all transfected vessels at 1 day after gene delivery. However, the activity of a reporter gene rapidly declined at 7 days thereafter, with only 33% of coronary arteries demonstrating luciferase activity. Comparable levels of transgene sequences were present in transfected vessels, although no correlation with luciferase activity was found. To further determine possible mechanisms responsible for rapidly declining transgene expression in vivo, cell proliferation was induced in the vessel wall by means of either balloon denudation or by intramural injections of platelet derived growth factor BB (PDGF-BB) into the porcine coronary vasculature at the time of gene transfer. Luciferase activity was significantly augmented (23-fold) following mitogenic stimulation in vivo as compared with the control transfected coronary arteries. These data demonstrate that a practical transcatheter approach provides an effective route to deliver recombinant DNA sequences into the coronary arterial wall.(ABSTRACT TRUNCATED AT 250 WORDS)
A NUCLEAR MAGNETIC RESONANCE STUDY OF KETO-ENOL EQUILIBRIA IN SCHIFF BASES. II (1961)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA NUCLEAR MAGNETIC RESONANCE STUDY OF KETO-ENOL EQUILIBRIA IN SCHIFF BASES. IIG. O. Dudek and R. H. HolmCite this: J. Am. Chem. Soc. 1961, 83, 18, 3914Publication Date (Print):September 1, 1961Publication History Published online1 May 2002Published inissue 1 September 1961https://pubs.acs.org/doi/10.1021/ja01479a051https://doi.org/10.1021/ja01479a051research-articleACS PublicationsRequest reuse permissionsArticle Views160Altmetric-Citations39LEARN 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
A Component Model for Model Transformations (2014)

Model-driven engineering promotes an active use of models to conduct the software development process. In this way, models are used to specify, simulate, verify, test and generate code for the final systems. Model transformations are key enablers for this approach, being used to manipulate instance models of a certain modelling language. However, while other development paradigms make available techniques to increase productivity through reutilization, there are few proposals for the reuse of model transformations across different modelling languages. As a result, transformations have to be developed from scratch even if other similar ones exist. In this paper, we propose a technique for the flexible reutilization of model transformations. Our proposal is based on generic programming for the definition and instantiation of transformation templates, and on component-based development for the encapsulation and composition of transformations. We have designed a component model for model transformations, supported by an implementation currently targeting the Atlas Transformation Language (ATL). To evaluate its reusability potential, we report on a generic transformation component to analyse workflow models through their transformation into Petri nets, which we have reused for eight workflow languages, including UML Activity Diagrams, YAWL and two versions of BPMN.
Heart Sound localization from Respiratory Sound using a robust wavelet based approach (2008)

This paper addresses the problem of heart sounds (HS) localization from single channel respiratory sounds (RS) recordings by applying wavelet-based localization scheme. After a wavelet-based multiscale decomposition of the noisy signal, HS contaminated segments are localized in the noisy RS signal based on the cumulative sums of likelihood ratios capturing the dynamic behaviour of the signal. Quantitative evaluation of the localized HS segments for various types of simulated data has been performed. The comparisons between the estimated boundaries of the localized HS segments and the actual segment boundaries of the synchronized pure HS signals show the proposed method is able to localize the HS segments accurately in an automatic way. Also, the test results on real RS recordings in terms of the detection accuracy show the promising performance by the proposed method.
Garbage collecting the world (1997)

A new garbage collection algorithm for distributed object systems, called DMOS (Distributed. Mature Object Space), is presented. It is derived from two previous algorithms, MOS (Mature Object Space), sometimes called the train algorithm, and PMOS (Persistent Mature Object Space). The contribution of DMOS is that it provides the following unique combination of properties for a distributed collector: safety, completeness, non-disruptiveness, incrementality, and scalability. Furthermore, the DMOS collector is non-blocking and does not use global tracing.
Effect of Oxygen on the Electrical Properties of Lead Telluride Films (1954)

The effect of oxygen on the electrical properties of PbTe films has been investigated. Oxygen, which presumably is adsorbed on the surface of the film, causes an increase in film resistance, followed by a decrease in resistance with increasing exposure to oxygen. The film which is originally "$n$" type changes to "$p$" type in the vicinity of the resistance maximum. The magnitude of the photoresistive and photovoltaic effect varies with the amount of oxygen adsorbed by the film. A model has been presented whereby oxygen removes electrons first from the conduction band, then from trapping states, and finally from the valence band, thereby producing the observed effects.
Role of gas phase reactions in silicon chemical vapor deposition from monosilane (1989)

A simple flow reactor experiment is described which measures the gas phase reaction contribution to silicon chemical vapor deposition from SiH4. The approach uses the fact that the rate constant for SiH4 homogeneous decomposition exhibits a linear total pressure dependence in the low-pressure chemical vapor deposition (LPCVD) regime. Gas phase reaction channels are found to be significant even under silicon LPCVD conditions.
Biotic Responses in Endophytic Grasses (2005)

This chapter contains section titled: Biotic Responses in Wild Grasses Invertebrate Responses in Forage and Turf Grasses Plant Pathogen Responses in Turf and Forage Grasses Multitrophic Interactions Factors Affecting Biotic Responses Summary References
A 4 M bit NVRAM technology using a novel stacked capacitor on selectively self-aligned FLOTOX cell structure (1990)

A novel stacked capacitor on selective self-aligned FLOTOX (SSSF) cell technology for 4-Mb nonvolatile DRAM (NV-DRAM) is described which enables a nondestructive flash store/recall (DRAM to EEPROM/EEPROM to DRAM) operation that does not disturb the original data in DRAM or EEPROM. The newly developed SSSF cell is fabricated by a triple polysilicon technology and consists of three transistors and one storage capacitor stacked on these transistors. A novel technology for the formation of a self-aligned tunnel region using selective oxide growth on the implanted region is shown together with a new self-aligned DRAM technology for storage node contact to the source. The timing diagrams in store/recall operations are also shown along with the DRAM to EEPROM data transfer characteristics.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Connexin26 mutations associated with the most common form of non- syndromic neurosensory autosomal recessive deafness (DFNB1) in Mediterraneans (1997)

Non-syndromic neurosensory autosomal recessive deafness (NSRD) is the most common form of genetic hearing loss. Previous studies defined at least 15 human NSRD loci. Recently we demonstrated that DFNB1, located on the long arm of chromosome 13, accounts for approximately 80% of cases in the Mediterranean area. Further analysis with additional markers now identifies several recombinants which narrow the candidate region to approximately 5 cM, encompassed by markers D13S141 and D13S232 and including several ESTs and candidate genes, including the connexin26 (GJB2) gene. Analysis of PCR products from our affected patients' DNA shows two frameshift mutations in the connexin26 gene. Deletion of a G within a stretch of six Gs at position 35 of the GJB2 cDNA (mutation 35delG) leads to premature chain termination and is present in 63% of NSRD chromosomes, demonstrating linkage to chromosome 13. Deletion of a T at position 167 of GJB2 (mutation 167delT), also resulting in premature chain termination, was detected in another patient. Four neutral sequence polymorphisms were also identified. These findings are in agreement with a recent study showing that mutations in the connexin26 gene are associated with genetic forms of deafness in three Pakistani families and that GJB2 is DFNB1. Connexin26 is a member of a large family of proteins involved in formation of gap junctions, which are involved in electrical synapses and the direct transfer of small molecules and ionic currents between neighboring cells. The identification of GJB2 as the DFNB1 gene should provide a better understanding of the biology of normal and abnormal hearing, help form the basis for diagnosis and may facilitate development of strategies for treatment of this common genetic disorder.
Digital radiography today--state of the art. (1989)

Following on from the introduction of Digital Subtraction Angiography at the beginning of the 80's and the positive experience gained worldwide since then, there has been an increasing interest in Digital Radiography. The reasons for this interest are complex and not just confined to considerations regarding image quality but include clinical and administrative advantages. The acceptance of DR systems, however, depends in the first instance on image quality and this can only be determined in clinical trials with ROC analysis. From results published so far it is clear that the digital matrix size is not so critical as was thought at first because of the increased contrast depth available. This article will briefly describe the alternative methods available today for generating digital radiographs with a short explanation of the technology involved and concomitant benefits. The differences between On-line and Off-line systems and their influence on examination practice will be explained before describing DR systems available. The subject of PACS (Picture Archiving and Communication Systems) will be briefly mentioned.
Crystal Structure and Magnetic Properties of an Organic Ion-Radical Salt: 1,3'-Diethyl-2,2'-Quinoselenacyanine-[TCNQ]<sub>2</sub> (1994)

The crystal structure and magnetic properties of an organic ion-radical salt, 1,3'-diethyl-2,2'-quinoselenacyanine-[TCNQ] 2 , are reported. The salt forms triclinic crystal in the space group \(P\overline{1}\) with a =14.180(3), b =17.689(2), c =8.244(1)Å, α=103.13(1), β=93.14(1), γ=70.06(1)° and Z =2. The spin-susceptibility of the salt shows two broad maxima near 45 and 195 K. A single ESR absorption line is observed for single crystals above 40 K and its linewidth strongly depends on the temperature and external magnetic field direction. On the contrary, two side lines due to an excited triplet state are observed below 40 K with a central line. These experimental results are discussed on the basis of the peculiar crystal structure of the salt.
Neue Synthesen von Pyrazolo[1,5‐<i>a</i>]‐<i>s</i>‐triazinen (1975)

Abstract Two new syntheses of pyrazolo[1,5‐ a ]‐ s ‐triazines are reported: (a) Addition of acetyl isocyanate to 5‐amino‐3‐methyl‐pyrazole followed by hydrolysis yields N‐(3‐methyl‐5‐pyrazolyl)‐urea ( 15 ), which on cyclisation with triethyl orthoacetate gives 2‐hydroxy‐4,7‐dimethylpyrazolo[1, 5‐ a ]‐ s ‐triazine ( 16 ). (b) Condensation of aminoguanidine with β‐oxo‐nitriles affords 1‐amidino‐5‐aminopyrazoles 18 . These are cyclised to pyrazolo[1,5‐ a ]‐ s ‐triazines 19‐‐21 by reaction with orthoesters, acetic‐formic anhydride, phenylisocyanide dichloride, dimethyl oxalate, N, N′‐carbonyldiimidazole, and N, N′‐thiocarbonyldiimidazole. The 4‐amino group in 19 is converted by standard procedures to OH, SH, SCH 3 , Cl and NRR′. Reaction of pyrazolo[1,5‐ a ]‐ s ‐triazines 30 with electrophiles leads to compounds substituted at position 8, e.g. 32a‐‐e .
Characterization of Lithium Alkyl Carbonates by X-ray Photoelectron Spectroscopy: Experimental and Theoretical Study (2005)

Lithium alkyl carbonates ROCO2Li result from the reductive decomposition of dialkyl carbonates, which are the organic solvents used in the electrolytes of common lithium-ion batteries. They play a crucial role in the formation of surface layers at the electrode/electrolyte interfaces. In this work, we report on the X-ray photoelectron spectroscopy (XPS) characterization of synthesized lithium methyl and ethyl carbonates. Using Hartree-Fock ab initio calculations, we interpret and simulate the valence spectra of both samples, as well as several other Li alkyl carbonates involved in Li-ion batteries. We show that Li alkyl carbonates can be identified at the electrode's surface by a combined analysis of XPS core peaks and valence spectra.
A fuzzy logic-based damage identification method for simply-supported bridge using modal shape ratios (2012)

A fuzzy logic system (FLS) is established for damage identification of simply supported bridge. A novel damage indicator is developed based on ratios of mode shape components between before and after damage. Numerical simulation of a simply-supported bridge is presented to demonstrate the memory, inference and anti-noise ability of the proposed method. The bridge is divided into eight elements and nine nodes, the damage indicator vector at characteristic nodes is used as the input measurement of FLS. Results reveal that FLS can detect damage of training patterns with an accuracy of 100%. Aiming at other test patterns, the FLS also possesses favorable inference ability, the identification accuracy for single damage location is up to 93.75%. Tests with noise simulated data show that the FLS possesses favorable anti-noise ability.
Electrical transport characteristics of chemically robust PDPP-DTT embedded in a bridged silsesquioxane network (2019)

Chemically robust films of PDPP-DTT imbedded within a bridged silsesquioxane exhibit superior electrical transport characteristics than what are achieved from neat films of PDPP-DTT.
Temperature gradients through EHD films and molecular alignment evidenced by infrared spectroscopy (1980)

Partial and complete emission band reversals have been observed in the infrared emission spectra from portions of operating sliding contacts. An elementary analysis has been carried out to show that partial reversals are due to temperature gradients in the fluid film - the film acts both as a radiation-emitter and absorber, and that total reversals - an emission spectrum appears as an absorption spectrum are likely to be due to a continuum source, such as hot solid asperities. The total energy radiated under the latter conditions exceeds that under the others. A decrease in gap width with increased load was accompanied by a dramatic spectral change in the case of 5P4E polyphenyl ether, which is indicative of molecular alignment.
Convergence properties of polynomial chaos approximations for L2 random variables. (2007)

Polynomial chaos (PC) representations for non-Gaussian random variables are infinite series of Hermite polynomials of standard Gaussian random variables with deterministic coefficients. For calculations, the PC representations are truncated, creating what are herein referred to as PC approximations. We study some convergence properties of PC approximations for L{sub 2} random variables. The well-known property of mean-square convergence is reviewed. Mathematical proof is then provided to show that higher-order moments (i.e., greater than two) of PC approximations may or may not converge as the number of terms retained in the series, denoted by n, grows large. In particular, it is shown that the third absolute moment of the PC approximation for a lognormal random variable does converge, while moments of order four and higher of PC approximations for uniform random variables do not converge. It has been previously demonstrated through numerical study that this lack of convergence in the higher-order moments can have a profound effect on the rate of convergence of the tails of the distribution of the PC approximation. As a result, reliability estimates based on PC approximations can exhibit large errors, even when n is large. The purpose of this report is not to criticize the use of polynomial chaos for probabilistic analysis but, rather, to motivate the need for further study of the efficacy of the method.