gebhart/patrepeval huggingface dataset:
Prehospital Ultrasound by Paramedics: Results of Field Trial (2010)

This pilot study shows that with close supervision, paramedics can adequately obtain and interpret prehospital FAST and AA US images under protocol. These results support a growing body of literature that indicates US may be feasible and useful in the prehospital setting.
Hamilton Paths in Grid Graphs (1982)

A grid graph is a node-induced finite subgraph of the infinite grid. It is rectangular if its set of nodes is the product of two intervals. Given a rectangular grid graph and two of its nodes, we give necessary and sufficient conditions for the graph to have a Hamilton path between these two nodes. In contrast, the Hamilton path (and circuit) problem for general grid graphs is shown to be NP-complete. This provides a new, relatively simple, proof of the result that the Euclidean traveling salesman problem is NP-complete.
Neutrophils Kill Antibody-Opsonized Cancer Cells by Trogoptosis (2018)

Destruction of cancer cells by therapeutic antibodies occurs, at least in part, through antibody-dependent cellular cytotoxicity (ADCC), and this can be mediated by various Fc-receptor-expressing immune cells, including neutrophils. However, the mechanism(s) by which neutrophils kill antibody-opsonized cancer cells has not been established. Here, we demonstrate that neutrophils can exert a mode of destruction of cancer cells, which involves antibody-mediated trogocytosis by neutrophils. Intimately associated with this is an active mechanical disruption of the cancer cell plasma membrane, leading to a lytic (i.e., necrotic) type of cancer cell death. Furthermore, this mode of destruction of antibody-opsonized cancer cells by neutrophils is potentiated by CD47-SIRPα checkpoint blockade. Collectively, these findings show that neutrophil ADCC toward cancer cells occurs by a mechanism of cytotoxicity called trogoptosis, which can be further improved by targeting CD47-SIRPα interactions.
Epitaxial growth of single-crystalline AlN films on tungsten substrates (2006)

The authors have grown single-crystalline AlN(0001) films on W(110) substrates with an in-plane alignment AlN[11–20]‖W[001] at temperatures ranging from 450to600°C by pulsed laser deposition. These AlN films have a clear sixfold symmetry without 30° rotational domains. When AlN films are grown at 450°C, the interfacial reaction between AlN and W(110) is fully suppressed and a flat surface with a root-mean-square value as low as 0.20nm for AlN films is obtained. These single-crystalline AlN films grown on W(110) open a good opportunity for the high performance film bulk acoustic wave resonators of the next generation.
The Research on the System of Examination and Assessment of Academic Teachers Based on the Cultural Reflections. (2006)

With some reflections on the management culture of higher educational institutions in China, this paper presents that it is not adequate to make analyses of rules and regulations from the mere perspective of institutional economics to get rid of short-term, which can be accounted for on a deeper level by the absence of management culture in the prevailing assessment system of teachers’ achievements; while the key to reform the system of assessing teachers’ work is to rebuild cultural conceptions in the management of higher educational institutions.
Application of selective epitaxy to fabrication of nanometer scale wire and dot structures (1990)

The selective growth of nanometer scale GaAs wire and dot structures using metalorganic vapor phase epitaxy is demonstrated. Spectrally resolved cathodoluminescence images as well as spectra from single dots and wires are presented. A blue shifting of the GaAs peak is observed as the size scale of the wires and dots decreases.
Absorption behaviors of surfactant molecules on a lipid-coated quartz-crystal microbalance. An alternative to eye-irritant tests (1991)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAbsorption behaviors of surfactant molecules on a lipid-coated quartz-crystal microbalance. An alternative to eye-irritant testsYoshio. Okahata and Hiroshi. EbatoCite this: Anal. Chem. 1991, 63, 3, 203–207Publication Date (Print):February 1, 1991Publication History Published online1 May 2002Published inissue 1 February 1991https://pubs.acs.org/doi/10.1021/ac00003a003https://doi.org/10.1021/ac00003a003research-articleACS PublicationsRequest reuse permissionsArticle Views299Altmetric-Citations37LEARN 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
Biodiversity of bacteriophages: morphological and biological properties of a large group of phages isolated from urban sewage (2016)

A large scale analysis presented in this article focuses on biological and physiological variety of bacteriophages. A collection of 83 bacteriophages, isolated from urban sewage and able to propagate in cells of different bacterial hosts, has been obtained (60 infecting Escherichia coli, 10 infecting Pseudomonas aeruginosa, 4 infecting Salmonella enterica, 3 infecting Staphylococcus sciuri, and 6 infecting Enterococcus faecalis). High biological diversity of the collection is indicated by its characteristics, both morphological (electron microscopic analyses) and biological (host range, plaque size and morphology, growth at various temperatures, thermal inactivation, sensitivity to low and high pH, sensitivity to osmotic stress, survivability upon treatment with organic solvents and detergents), and further supported by hierarchical cluster analysis. By the end of the research no larger collection of phages from a single environmental source investigated by these means had been found. The finding was confirmed by whole genome analysis of 7 selected bacteriophages. Moreover, particular bacteriophages revealed unusual biological features, like the ability to form plaques at low temperature (4 °C), resist high temperature (62 °C or 95 °C) or survive in the presence of an organic solvents (ethanol, acetone, DMSO, chloroform) or detergent (SDS, CTAB, sarkosyl) making them potentially interesting in the context of biotechnological applications.
Warped Mirrors for flash (2013)

Flash-based devices are cost-competitive to traditional hard disks in both personal and industrial environments and offer the potential for large performance gains. However, as flash-based devices have a high bit-error rate and a relatively short lifetime, reliability issues remain a major problem. One possible solution is redundancy; using techniques such as mirroring, data reliability and availability can be greatly enhanced. All standard RAID approaches assume that devices do not wear out, and hence distribute work equally among them; unfortunately, for flash, this approach is not appropriate as the life of flash cell depends on the number of times it is written and cleaned. Hence, identical write patterns to mirrored flash drives introduce a failure dependency in the storage system, increasing the probability of concurrent device failure and hence data loss. We propose Warped Mirrors as a solution to this endurance problem for mirrored flash devices. By carefully inducing a slight imbalance into write traffic across devices, we intentionally increase the workload of one device in the mirror pair, and thus increase the odds that it will fail first. Thus, with our approach, device failure independence is preserved. Our simulation results show that across both synthetic and traced workloads, little performance overhead is induced.
UWB bandpass filter with quad‐notched bands using arrow‐shaped resonators (2015)

ABSTRACT An UWB bandpass filter with quad‐notched bands is presented in this letter. The filter is comprised of a seven‐pole pseudo‐bandpass filter which is based on optimum distributed highpass filters and eight arrow‐shaped resonators which provide four notched bands. The effects of the physical parameters of the arrow‐shaped resonators on the S parameter of the presented filter are detailed investigated. The presented filter is fabricated and measured after it has been meticulously designed on a RO4350B substrate whose dimensions are 50 × 12 × 0.508 mm 3 . Both simulation and experimental results are provided and compared with each other. Simulation results show that the notched frequencies can be altered by changing the physical parameters of the arrow‐shaped resonators. Measurement results show that, within 2.89–10.78 GHz, which is 3‐dB bandwidth of the bandpass filter, four notched bands centered at 3.53, 5.35, 5.85, and 8.08 GHz with the notch depth is higher than 16 dB are obtained. The current distributions of the notched frequencies and the frequency within the pass band are also investigated. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:959–963, 2015
Windkesselness of coronary arteries hampers assessment of human coronary wave speed by single-point technique (2008)

A novel single-point technique to calculate local arterial wave speed (SPc) has recently been presented and applied in healthy human coronary arteries at baseline flow. We investigated its applicability for conditions commonly encountered in the catheterization laboratory. Intracoronary pressure (P(d)) and Doppler velocity (U) were recorded in 29 patients at rest and during adenosine-induced hyperemia in a distal segment of a normal reference vessel and downstream of a single stenosis before and after revascularization. Conduit vessel tone was minimized with nitroglycerin. Microvascular resistance (MR) and SPc were calculated from P(d) and U. In the reference vessel, SPc decreased from 21.5 m/s (SD 8.0) to 10.5 m/s (SD 4.1) after microvascular dilation (P < 0.0001). SPc was substantially higher in the presence of a proximal stenosis and decreased from 34.4 m/s (SD 18.2) at rest to 27.5 m/s (SD 13.4) during hyperemia (P < 0.0001), with a concomitant reduction in P(d) by 20 mmHg and MR by 55.4%. The stent placement further reduced hyperemic MR by 26% and increased P(d) by 26 mmHg but paradoxically decreased SPc to 13.1 m/s (SD 7.7) (P < 0.0001). Changes in SPc correlated strongly with changes in MR (P < 0.001) but were inversely related to changes in P(d) (P < 0.01). In conclusion, the single-point method yielded erroneous predictions of changes in coronary wave speed induced by a proximal stenosis and distal vasodilation and is therefore not appropriate for estimating local wave speed in coronary vessels. Our findings are well described by a lumped reservoir model reflecting the "windkesselness" of the coronary arteries.
Pharmacokinetics and pharmacodynamics of a new transdermal delivery system for bopindolol. (1991)

1. In two separate studies, each with 12 healthy male volunteers, the pharmacokinetic and dynamic properties of a transdermal delivery system for bopindolol were evaluated. 2. In study I it was shown that bopindolol absorption from a 14 mg patch occurred over the whole 7-day application period. No signs of a significant skin depot were found. 3. In study II, a linear pharmacokinetic behaviour but a non-linear kinetic/dynamic relationship was established for the patches over a dose range from 7 to 21 mg. Comparable peak effects of reduction in exercise-induced tachycardia were observed after different patch doses and an i.v. injection. However, the effect was significantly prolonged with the patches compared with the injection and was maintained over 7 days. 4. The patches showed a good local and systemic tolerability in both studies over a dosing interval of up to 7 days.
Handbook of transducers (1989)

Transducers are being used extensively for measurement as well as control instrumentation in virtually all scintific and industrial fields. This is a handbook for their use in automobiles, appliances, alarm systems, and pollution control. This book shows which transducers are available for the various categories of measurements, describes how they operate, and clarifies the differences between transducer types usable for similar measurements.
Insediamenti rurali di età romana in Valpolicella: alcune riflessioni attraverso le monete (2005)

Esame dei ritrovamenti monetali nelle ville urbano-rustiche e fattorie di eta romana in Valpolicella, in particolare nelle strutture scavate in localita Villa a Negrar, in localita Ambrosan e Quar a San Pietro in Cariano e in localita Archi a Castelrotto. Nonostante l'estensione relativamente ampia di questi insediamenti, colpisce il numero ridotto delle monete venute alla luce, quasi tutte in bronzo e databili perlopiu al I e al II secolo d.C. Tale scarsita potrebbe essere dovuta alla fretta con la quale alcune di queste strutture sono state indagate, come nel caso della villa di Negrar, oppure all'abbandono dell'insediamento, come nel caso della fattoria di Archi di Castelrotto. E possibile che parte delle monete rinvenute ad Archi fosse destinata al pagamento dell'affitto del fondo pertinente alla fattoria, la quale dipendeva forse dall'estesa villa urbano-rustica sita in localita Ambrosan.
Biological Elimination of Polycyclic Aromatic Hydrocarbons in Solvent Extracts of Polluted Soil by the White Rot Fungus, Bjerkandera Sp. Strain BOS55 (1996)

Polycyclic aromatic hydrocarbons (PAH) are persistent priority pollutants of soil and sediments. Miscible solvent extraction of the soil has previously been shown to effectively clean-up PAH pollution. The purpose of this study was to evaluate the use of the white rot fungus, Bjerkandera sp. strain BOS55 in initiating the degradation of PAH present in solvent extracts. The PAH in extracts of polluted soil added to 9-day-old liquid fungal cultures were removed by 80% in 7 days with 2% (v/v) ethanol in the medium. Smaller PAH compounds of only a few rings were degraded more rapidly than complexer PAH compounds having more rings. Phenanthrene, anthracene and pyrene with 3 to 4 rings were eliminated by 96.8 to 99.5%; whereas, benzo[b]fluoranthene and indeno[123cd]pyrene of 5 and 6 rings were eliminated by 52 and 20% in 7 days, respectively. When the PAH extract of polluted soil was incubated in fungal cultures together with 20% acetone or ethanol, the cells were killed by the solvent. Nonetheless, partial bioconversion of PAH occurred which was most likely due to the presence of extracellular peroxidases.
Numerical Study on Dynamic Swing of Suspension Insulator String in Overhead Transmission Line under Wind Load (2009)

Numerical modeling of an overhead transmission line section and the digital simulation of stochastic wind field, to which the transmission line section is exposed, are presented. Time-domain analyses of typical transmission line sections in stochastic wind fields are carried out by ABAQUS software. It is discovered that the numerically determined dynamic swing angles of the suspension insulator strings in the transmission line sections are larger than those calculated with the formulas proposed in the technical code for designing overhead transmission lines. A dynamic wind load factor is suggested to be introduced into the formulas proposed in the design code.
2506 Development of measuring system for contraction characteristics of a single cardiac myocyte (2005)

This paper is a study on the measurement of mechanical properties of a living cardiac myocyte. We propose micro mechanical sensors made of PDMS using soft lithography technique. The device consists of micro columns arrays and work as vertical cantilevers measuring local forces of a myocyte. The generated force derives from the displacement of the top of column. This approach has the potential to measure 2-dimensional mechanical properties of a single myocyte to develop a viscoelastic constitutive equation for a bio-simulator model.
SOME FACTORS INFLUENCING THE LONG-WAVE LIMIT OF PHOTOSYNTHESIS (1957)

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
Wide Tunning Range 60 GHz VCO and 40 GHz DCO Using Single Variable Inductor (2012)

This paper presents a 60 GHz, 16% tuning range VCO, and a 40 GHz, 18 bits, 14% tuning range DCO incorporating variable inductor (VID) techniques. The variable inductor, consisting of a transformer and a variable resistor, is tunable by adjusting its resistor. By employing the proposed frequency tuning scheme, wide-tuning range as well as multi-band operation are achieved without sacrificing their operating frequencies. To verify the operation principles, the VCO and DCO are both fabricated in 90 nm CMOS technology. The tuning range of VCO is from 52.2 GHz to 61.3 GHz. The measured phase noise from a 61.3-GHz carrier is about - 118.75 dBc/Hz at 10-MHz offset, and the output power is -6.6 dBm. It dissipates 8.7 mW from a 0.7-V supply, and the chip size is 0.28×0.36mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . On the other hand, the DCO is capable of covering frequency range from 37.6 GHz to 43.4 GHz. The measured phase noise from a 43 GHz carrier is about -109 dBc/Hz at 10-MHz offset, and the output power is -11 dBm. The DCO core dissipates 19 mW from a 1.2-V supply. Chip size is 0.5×0.15mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> .
An ISM band CMOS integrated wireless telemetry transceiver (in a 0.18 μm copper CMOS process) (2002)

A 900 MHz CMOS BFSK transceiver is used as a test vehicle to evaluate the impact of copper interconnect on CMOS RF circuit performance. The RF front-end contains spiral inductors and fractal capacitors, whose parasitics degrade the receiver sensitivity. It is shown that spiral inductor quality factors (Qs) are on average 70 % higher when copper interconnect is used in place of aluminum, while capacitor Qs are also improved significantly. As a result, the front-end receiver gain is increased by nearly 4 dB and the receiver noise figure is reduced by more than 1 dB when copper is used instead of aluminum. The 20 mW transceiver fabricated in the 0.18 /spl mu/m copper UMC process can achieve a 0.1 % BER for a -98 dBm input, while operating at 200 kb/s data. The maximum power output of transmit section is +10 dBm.
Effect of fuel injector type on performance and emissions of reverse-flow combustor (1981)

The combustion process in a reverse-flow combustor suitable for a small gas turbine engine was investigated to evaluate the effect of fuel injector type on performance and emissions. Fuel injector configurations using pressure-atomizing, spill-flow, air blast, and air-assist techniques were compared and evaluated on the basis of performance obtained in a full-scale experimental combustor operated at inlet conditions corresponding to takeoff, cruise, low power, and idle and typical of a 16:1-pressure-ratio turbine engine. Major differences in combustor performance and emissions characteristics were experienced with each injector type even though the aerodynamic configuration was common to most combustor models. Performance characteristics obtained with the various fuel injector types could not have been predicted from bench-test injector spray characteristics. The effect of the number of operating fuel injectors on performance and emissions is also presented.
Primary structure of the Escherichia coli ribonucleoside diphosphate reductase operon. (1984)

The nucleotide sequence of the Escherichia coli K-12 DNA comprising the operon for the structural genes of the subunits of ribonucleotide diphosphate reductase has been determined. The DNA sequenced maps at 48.5 minutes on the E. coli chromosome and includes a total length of 8557 nucleotides. An open reading frame between nucleotides 3506 and 5834, encoding a 776-amino acid polypeptide chain with a molecular weight of 87,532, has been identified as the nrdA gene. An open reading frame between nucleotides 6012 and 7139, encoding a 375-amino acid polypeptide with a molecular weight of 43,466, has been identified as the nrdB gene. The sequences reveal not only the primary structures for both subunits, but also some interesting aspects of potential regulatory sites.
Estimation of the time-varying frequency of a signal: the Cramer-Rao bound and the application of Wigner distribution (1990)

The problem of estimating the time-varying frequency of a signal is addressed. The Cramer-Rao bound of such an estimate is developed. The Wigner distribution is applied to this problem. A theoretical analysis which derives the bias and variance resulting from the use of the Wigner distribution is performed. Computer simulation results that verify the performance of the method are presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Synthesis, characterization and rheological property of biphenyl-based polyarylene ether nitrile copolymers (2007)

The high molecular weight biphenyl-based polyarylene ether nitrile copolymers were synthesized by nucleophilic substitution reaction of 2,6-dichlorobenzonitrile (DCBN) with varying molar ratios of 4,4'-dihydroxybiphenyl (BP) and hydroquinone (HQ). The BP content of the copolymers has influence on glass transition temperature (Tg), initial decomposition temperature (Tid), mechanical properties and the crystallinity. All the copolymers could be dissolved in NMP, DMF and DMAc on heating, and were stable up to 450C with a high char yield above 50% at 800C in nitrogen atmosphere. The glass transition temperature, the melting temperature and tensile strength of copolymers were found to increase with increase in concentration of the BP units in the polymer. The dynamical viscosity and the storage modulus have been influenced by the BP concentration, frequency, temperature and time. This rheological results show that these copolymers have best thermoplastic processability and stability at 300-400C.
Twenty Years of Undergraduate Libraries: (1996)

Undergraduate libraries as part of university library systems have existed since 1949. Supplementing undergraduate library statistics available since 1971 with responses to an electronic mail survey, the authors offer a descriptive picture of how such libraries have responded to change and the changing needs of an undergraduate population.