gebhart/patrepeval huggingface dataset:
Collaborative streaming in heterogeneous and dynamic scenarios (2006)

This media streaming architecture solves the problems of collaborative session management, from session sharing to control of the common session state to session transfer among networked clients.
<scp>PVAm–PIP/PS</scp> Composite Membrane with High Performance for <scp><scp>CO</scp></scp><sub>2</sub>/<scp><scp>N</scp></scp><sub>2</sub> Separation (2012)

Polyvinylamine ( PVAm ) was modified using a cross‐linking agent containing carriers piperazine ( PIP ). Attenuated total reflectance fourier transform infrared, elemental analyzer, and X ‐ray diffraction were used to characterize the PIP ‐modified PVAm . The PVAm–PIP /polysulfone ( PS ) composite membrane was developed by coating PVAm–PIP mixed solutions with different mass ratios of PIP/PVAm (m PIP /m PVAm ) on the PS ultrafiltration membrane. The effects of m PIP /m PVAm (from 0.715 to 2.860) in the coating solutions and wet coating thickness on the gas performance of the PVAm–PIP/PS composite membrane were investigated. The PVAm–PIP/PS composite membrane prepared showed higher performance than other membranes reported in the literature due to the large increase of the introducing carrier concentration and low crystallinity. Moreover, the separation performance stability of the PVAm–PIP/PS composite membrane was investigated and no deterioration in the membrane permselectivity was observed. Finally, the economic evaluation of the membrane with the highest performance prepared was carried out. © 2012 American Institute of Chemical Engineers AIChE J, 59: 215–228, 2013
Enhancement of the Photoinduced Oxidation Activity of a Ruthenium(II) Complex Anchored on Silica‐Coated Silver Nanoparticles by Localized Surface Plasmon Resonance (2010)

Plasmonic photocatalyst: Anchoring the dye [Ru(bpy)3]2+ (bpy=2,2′-bipyridine) on the surface of Ag nanoparticles coated with a thin SiO2 layer (see picture) afforded a photocatalyst whose phosphorescence emission and photoinduced oxidation activity in the selective liquid-phase oxidation of styrene are efficiently enhanced through interaction with the localized surface plasmon resonance of the core Ag nanoparticles.
Trapping and dynamic manipulation of polystyrene beads mimicking circulating tumor cells using targeted magnetic/photoacoustic contrast agents (2012)

Results on magnetically trapping and manipulating micro-scale beads circulating in a flow field mimicking metastatic cancer cells in human peripheral vessels are presented. Composite contrast agents combining magneto-sensitive nanospheres and highly optical absorptive gold nanorods were conjugated to micro-scale polystyrene beads. To efficiently trap the targeted objects in a fast stream, a dual magnet system consisting of two flat magnets to magnetize (polarize) the contrast agent and an array of cone magnets producing a sharp gradient field to trap the magnetized contrast agent was designed and constructed. A water-ink solution with an optical absorption coefficient of 10 cm⁻¹ was used to mimic the optical absorption of blood. Magnetomotive photoacoustic imaging helped visualize bead trapping, dynamic manipulation of trapped beads in a flow field, and the subtraction of stationary background signals insensitive to the magnetic field. The results show that trafficking micro-scale objects can be effectively trapped in a stream with a flow rate up to 12 ml/min and the background can be significantly (greater than 15 dB) suppressed. It makes the proposed method very promising for sensitive detection of rare circulating tumor cells within high flow vessels with a highly absorptive optical background.
Clock-controlled chaotic keystream generators (1998)

The authors propose clock-controlled chaotic keystream generators for generating keystreams with periods long enough for cryptographic use while maintaining the good statistical properties of chaotic dynamics. These keystream generators may provide higher security than other proposed methods.
ANEMIA AND ERYTHROPOIETIN LEVELS IN LUNG TRANSPLANT RECIPIENTS (1995)

An evaluation of 26 surviving outpatient lung transplant recipients at one center showed that 65% (17/26) had significant anemia (hemoglobin < 11 g/L for women, < 14 g/dl for men) at a median follow-up of 13.5 months after transplantation (range, 1-41 months). There were 14 men and 12 women with a mean age of 45.1 years (range, 23.1-66.7 years). Fifteen had a double allograft and 11 had a single allograft. Anemia was normochromic and normocytic/macrocytic with a tendency to anisocytosis, with normal reticulocyte counts. Iron deficiency (transferrin saturation < 20%) was found in 35% (6/17) of anemic patients, and two of them also had ferritin levels < 15 micrograms/L. In addition, vitamin B12 was decreased in 1 patient. Folate levels were all normal. Erythropoietin levels were significantly decreased in anemic lung transplant recipients as compared with nontransplanted iron-deficient anemic patients (median, 1 mU/ml, range 1-41 mU/ml, vs. 53 mU/ml, 15-88 mU/ml; P < 0.05). In nonanemic lung transplant recipients, erythropoietin levels were decreased too, as compared with normal controls (median, 2 mU/ml, range 1-21 mU/ml, vs. 5 mU/ml, 3-32 mU/ml; P < 0.05). Investigation of peripheral stem cells in 9 patients showed normal stimulation of erythroids (burst-forming unit, erythroid; median, 573 cells/ml; range, 128-1898 cells/ml) independent of erythropoietin concentrations. Analysis of putative prognostic factors, such as age, surgical procedure (double vs. single lung allograft), indication for transplantation, time after transplantation, infection status, presence of bronchiolitis obliterans, immunosuppression (+/- azathioprine), serum creatinine, creatinine clearance, hypertension, and arterial partial pressure of oxygen, did not demonstrate any difference in erythropoietin concentrations. Only the sex variable revealed a trend to higher levels in women than in men (median, 4 mU/ml, range 1-41 mU/ml, vs. 1 mU/ml, 1-16 mU/ml; P > 0.05). The causes for low erythropoietin levels are not quite understood yet; however, they offer a rationale for the treatment of chronic anemia with recombinant human erythropoietin.
Efficient time synchronization of 1588v2 technology in packet network (2011)

To support system-wide synchronization accuracy and precision in the sub-microsecond range without using GPS technique, the Precise Time Protocol (PTP) standard IEEE-1588V2 is introduced. Various factors affect the clock synchronization precision, such as the location of timestamp point, frequency difference between Master and Slave, delay asymmetry and error accumulation. In this paper, we analyze these factors and propose an implementation of 1588v2 over UDP in Ethernet. This implement method efficiently reduces the effect of the above factors and guarantees the time and frequency synchronization precision supported by PTP.
Thermophysical and bionotox properties of solvo-surfactants based on ethylene oxide, propylene oxide and glycerol (2007)

Thermophysical and bionotox properties of a new class of natural solvo-surfactants, glycerol 1-monoethers, were investigated in comparison with widespread but harmful glycol ethers. Vapour pressures and heats of vaporization were measured between 25 °C and 50 °C, and calculated thanks to two group contribution methods. Evaporation rates and Hansen parameters, evaluated from TGA measurements and group contributions respectively, were compared as well. Bionotox properties, i.e. cytotoxicity, irritating power and biodegradability, were evaluated experimentally. Glycerol 1-monoethers turned out to be less volatile than glycol derivatives, but contrary to the latter they will not be considered as VOCs. Toxicities and irritating powers are equivalent and increase with increasing alkyl chain length, i.e. with increasing amphiphilicity. Glycerol ethers are degradable at lower concentrations compared to glycol compounds, which is related to their higher interfacial activity.
A Study on the Korean Syllable As Recognition Unit (1997)

In this paper, study and experiments are performed for finding recognition unit fit which can be used in large vocabulary recognition system. Specifically, a phoneme that is currently used as recognition unit and a syllable in which Korean is well characterized are selected. From comparisons of recognition experiments, the study is performed whether a syllable can be considered as recognition unit of Korean recognition system. For report of an objective result of the comparison experiment, we collected speech data of a male speaker and processed them by hand-segmentation for phoneme boundary and labeling to construct speech database. And for training and recognition based on HMM, we used HTK (HMM Tool Kit) 2.0 of commercial tool from Entropic Co. to experiment in same condition. We applied two HMM model topologies, 3 emitting state of 5 state and 6 emitting state of 8 state, in Continuous HMM on training of each recognition unit. We also used 3 sets of PBW (Phonetically Balanced Words) and 1 set of POW(Phonetically Optimized Words) for training and another 1 set of PBW for recognition, that is Speaker Dependent Medium Vocabulary Size Recognition. Experiments result reports that recognition rate is 95.65% in phoneme unit, 94.41% in syllable unit and decoding time of recognition in syllable unit is faster by 25% than in phoneme.
Investigation on the simulation of the reactive extrusion of nylon 6 (1995)

Abstract In this article, a novel simulation of the processing conditions of the anionic ring‐opening polymerization of nylon 6 in a counterrotating twin‐screw extruder by use of a modified Haake Rheometer run at elevated temperatures is described. Experimental results for several combinations of processing parameters are presented. General relations between processing parameters, conversion ratio, and molecular weight of the product are observed. These observations can be used in the eventual scaling up of investigation to an actual twinscrew extruder. © 1995 John Wiley & Sons, Inc.
Nano- and Micropatterning by Organic–Inorganic Templating of Hierarchical Self-Assembled Structures (2002)

Without large investments in new clean-room facilities, the nano- and microstructures described here can be achieved by the combination of wet-chemistry with existing conventional lithographic techniques. One of the advantages of the method is that it allows the specific formation of aperiodic patterns, which are of specific interest, since the symmetry that is an intrinsic part of the self-assembly of molecules can be overridden. Another advantage is that the use of organic–inorganic templates allows access to pure inorganic nanostructures.
Mechanisms of Vascular Smooth Muscle Cell Migration (2007)

Smooth muscle cell migration occurs during vascular development, in response to vascular injury, and during atherogenesis. Many proximal signals and signal transduction pathways activated during migration have been identified, as well as components of the cellular machinery that affect cell movement. In this review, a summary of promigratory and antimigratory molecules belonging to diverse chemical and functional families is presented, along with a summary of key signaling events mediating migration. Extracellular molecules that modulate migration include small biogenic amines, peptide growth factors, cytokines, extracellular matrix components, and drugs used in cardiovascular medicine. Promigratory stimuli activate signal transduction cascades that trigger remodeling of the cytoskeleton, change the adhesiveness of the cell to the matrix, and activate motor proteins. This review focuses on the signaling pathways and effector proteins regulated by promigratory and antimigratory molecules. Prominent pathways include phosphatidylinositol 3-kinases, calcium-dependent protein kinases, Rho-activated protein kinase, p21-activated protein kinases, LIM kinase, and mitogen-activated protein kinases. Important downstream targets include myosin II motors, actin capping and severing proteins, formins, profilin, cofilin, and the actin-related protein-2/3 complex. Actin filament remodeling, focal contact remodeling, and molecular motors are coordinated to cause cells to migrate along gradients of chemical cues, matrix adhesiveness, or matrix stiffness. The result is recruitment of cells to areas where the vessel wall is being remodeled. Vessel wall remodeling can be antagonized by common cardiovascular drugs that act in part by inhibiting vascular smooth muscle cell migration. Several therapeutically important drugs act by inhibiting cell cycle progression, which may reduce the population of migrating cells.
Potential hazards of selenium as a chemopreventive agent. (1983)

Clinical and metabolic features of the trace element selenium and the full spectrum of its animal and human toxicity have been reviewed. The difficulties in coming to an easy understanding of the biologic properties of selenium stem from its multiple forms and complex metabolic and biochemical pathways. It is suggested that chemoprevention trials focus on the efficacy of organic and inorganic prototype forms such as selenomethionine and the selenite ion. While some appreciation of the toxic potential of these two prototype forms can be predicted from existing information, additional formal toxicology will be necessary, particularly for selenomethionine.
Offshore Nickel Alloy Tubing Hanger and Duplex Stainless Steel Piping Failure Investigations (2003)

Abstract In the offshore oil and gas industry, extensive use is made of corrosion resistant alloys. Two failure cases are described, one with the Cr and Mo containing nickel base alloy UNS N07718 and one with the 22%Cr duplex stainless steel UNS S31803. A UNS N07718 nickel alloy tubing hanger failed at the box end of the hanger at one of the upper threads, where stress was at a maximum. The cause was found to be the presence of delta phase, which rendered the material sensitive to hydrogen embrittlement, as was shown in a laboratory study. Hydrogen could originate from the manufacturing process, in which case it could be prevented, or from in situ corrosion, which may be enhanced by galvanic coupling to carbon steel. UNS N07718 accessories should therefore be produced in such a way as to minimize the formation of delta phase and evaluation of the presence of delta phase should be part of the qualification procedure. In a UNS S31803 duplex stainless steel hot condensate piping system, a leak was detected. It was found to have resulted from cracking from the inside at a location where pressure drop could lead to water evaporation. A laboratory study confirmed that at elevated temperature (140 °C) chloride stress corrosion cracking occurs, even in essentially oxygen free conditions, when the steel is exposed to the highly concentrated brines with reduced pH that result from evaporation. The role of oxygen appears to be an acceleration of the cracking process. In cases where brine concentration cannot be avoided, construction materials need to be upgraded.
Selection diversity forwarding in a multihop packet radio network with fading channel and capture (2001)

Recent and increased interest of wireless mobile ad hoc networking motivates detailed examination of routing schemes specifically targeted for the demanding constraints that an unreliable, time varying and broadcast like wireless medium imposes. Incorporation and exploitation of radio characteristics are fundamental keys to successful and near optimal operation of routing schemes in a wireless environment. In this paper, forwarding methods for wireless mobile multihop networking in Rayleigh fading and non-fading channels are examined. An adaptive forwarding scheme denoted Selection Diversity Forwarding (SDF) is introduced and compared with two classical forwarding methods. It is shown that SDF presents significant performance improvements. In particular and in contrast to the reference methods NFP and MFR, the performance of SDF is enhanced under fading channel conditions. It is found that local path adaptation has potential to perform better than routing approaches along a single path.
A 48 V, 1.5 kW, front-end zero-voltage-switched, PWM converter with lossless active snubbers for output rectifiers (2002)

A 48 V, 1.5 kW, zero-voltage-switched, phase-controlled PWM power converter for front-end application in a distributed power system is introduced. The converter operates at 150 kHz, employs lossless active snubbers for its output rectifiers, and achieves an efficiency of about 94% with an input voltage range from 330 V to 425 V. The active snubbers effectively eliminate the voltage spikes and ringings across the rectifiers. As a result, lower-voltage rectifiers can be used and a saving of approximately 45 W in conduction losses and snubber losses is obtained, as compared to using conventional RC snubbers. The implementation of the lossless active snubbers and its impact on the converter's primary current are discussed.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
[The epidemiology of irritable bowel syndrome and functional constipation of Guangzhou residents]. (2001)

The prevalence rates of IBS and functional constipation in Guangzhou City were lower than that in west countries.
Clinical Pharmacology and Pharmacokinetics of Once‐Daily Hydromorphone Hydrochloride Extended‐Release Capsules (2005)

Hydromorphone hydrochloride extended release (HHER) is a multiparticulate melt-extrusion pellet capsule formulation administered q24h. Study 1 investigated the bioavailability of 24-mg HHER fed, as well as 24-mg and 12-mg HHER and 8-mg hydromorphone hydrochloride immediate-release (HHIR) tablets fasting. No clinically significant food effect was observed on hydromorphone C(max) or AUC for the 24-mg HHER, and dose proportionality (AUC) was demonstrated between 12- and 24-mg HHER. Study 2 demonstrated dose strength proportionality for 3 x 12-mg HHER versus 1 x 32-mg HHER. Study 3 evaluated 12-mg HHER q24h versus 3-mg HHIR q6h at steady state. HHER produced relatively constant steady-state concentrations over 24 hours. HHER and HHIR were equivalent for AUC(ss). C(ssmax) was 26% lower for HHER than HHIR, C(ssmin) was 43% higher for HHER, and peak-to-trough fluctuation was 126% for HHER versus 328% for HHIR, which are ideal attributes of a once-daily oral extended-release dosage form. HHER administration resulted in fewer adverse events than HHIR in study 3.
Decomposition of N-(2-chloroethyl)-N-nitrosocarbamoyl amino acid amides (1988)

The chemical decomposition of N-(2-chloroethyl)-N-nitrosocarbamoyl (Q(NO] prolinamide and valinamide were studied under physiological conditions. The volatile products were identified with GC. Q(NO)-Pro-NH2 gave twice the amount of ethylene glycol and only one-fifth of the 2-chloroethanol produced by Q(NO)-Val-NH2 or BCNU, pointing to different pathways of their decomposition. The carbamoylating activity was also investigated in the presence of cyclohexylamine, and it was found to lead mainly to intramolecular carbamoylation with the formation of hydantoin derivatives.
Influence of pressure-induced temperature drop on the foaming behavior of amorphous polylactide (PLA) during autoclave foaming with supercritical CO2 (2022)

Autoclave technology is widely used for the fabrication of cellular structures based on thermoplastic polymers. In this work, the autoclave process is investigated focusing on thermodynamic phenomena during the expansion of supercritical fluids. The depressurization with supercritical carbon dioxide (scCO2) leads to rapid adiabatic expansion, which affects pressure drop rate (PDR) and temperature inside the vessel. Analysis of density versus saturation temperature and pressure allows identification of a "valley" bounded by three limits to low densities. First two are caused by (i) low viscosity for stabilization and (ii) thermodynamically suppressed nucleation and expansion at low pressures. At high pressures and low temperatures, the expansion of the medium leads to a temperature drop (iii), which increases resistance of the polymer to stretching. Morphological examination showed significant influence of the initial pressure drop rate on the nucleation density. Size and integrity of cells can be adjusted by selective modification of foaming conditions.
An Approach to Glycerol Dendrimers and Pseudo-Dendritic Polyglycerols (2000)

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTAn Approach to Glycerol Dendrimers and Pseudo-Dendritic PolyglycerolsRainer Haag, Alexander Sunder, and Jean-François StumbéView Author Information Freiburger Materialforschungszentrum und Institut für Makromolekulare Chemie, Albert-Ludwigs-Universität, Stefan-Meier-Strasse 21, 79104 Freiburg, Germany Cite this: J. Am. Chem. Soc. 2000, 122, 12, 2954–2955Publication Date (Web):March 10, 2000Publication History Received14 December 1999Published online10 March 2000Published inissue 1 March 2000https://pubs.acs.org/doi/10.1021/ja994363ehttps://doi.org/10.1021/ja994363erapid-communicationACS PublicationsCopyright © 2000 American Chemical SocietyRequest reuse permissionsArticle Views3421Altmetric-Citations189LEARN 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-AlertscloseSupporting Info (1)»Supporting Information Supporting Information SUBJECTS:Alcohols,Dendrons,Organic polymers,Physical and chemical properties,Polymers Get e-Alerts
Ontologies Come of Age (2003)

Ontologies have moved beyond the domains of library science, philosophy, and knowledge representation. They are now the concerns of marketing departments, CEOs, and mainstream business. Research analyst companies such as Forrester Research report on the critical roles of ontologies in support of browsing and search for e-commerce and in support of interoperability for facilitation of knowledge management and configuration. One now sees ontologies used as central controlled vocabularies that are integrated into catalogues, databases, web publications, knowledge management applications, etc. Large ontologies are essential components in many online applications including search (such as Yahoo and Lycos), ecommerce (such as Amazon and eBay), configuration (such as Dell and PC-Order), etc. One also sees ontologies that have long life spans, sometimes in multiple projects (such as UMLS, SIC codes, etc.). Such diverse usage generates many implications for ontology environments. In this paper, we will discuss ontologies and requirements in their current instantiations on the web today. We will describe some desirable properties of ontologies. We will also discuss how both simple and complex ontologies are being and may be used to support varied applications. We will conclude with a discussion of emerging trends in ontologies and their environments and briefly mention our evolving ontology evolution environment.
The Effect of the Secondary Market on the Pricing of Initial Public Offerings: Theory and Evidence (1992)

David C. Mauer, Lemma W. Senbet, The Effect of the Secondary Market on the Pricing of Initial Public Offerings: Theory and Evidence, The Journal of Financial and Quantitative Analysis, Vol. 27, No. 1 (Mar., 1992), pp. 55-79