gebhart/patrepeval huggingface dataset:
Switching impulse strength of air insulation: leader inception criterion (1989)

The author introduces a general criterion for leader inception of phase-to-ground air insulation under positive critical switching impulses. This criterion established the correspondence between continuous leader initiation in the vicinity of the highly stressed electrode and conditions prevailing later at the instant of the final jump. The criterion is applied to several complex electrode configurations, including rod-rod, conductor-rod, and conductor-structure gaps, where both analytic and digital techniques are used to compute the leader inception voltage, 50% breakdown voltage, and gap factor. The theory has been systematically tested against available experimental results with quite satisfactory agreement.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Full-duplex in a hand-held device — From fundamental physics to complex integrated circuits, systems and networks: An overview of the Columbia FlexICoN project (2016)

Full-duplex wireless is an exciting emerging wireless communication paradigm that also poses tremendous challenges at virtually every layer: from the antenna interface and integrated circuits (ICs) and systems to the network layer. This paper covers recent advances at Columbia University across all these dimensions. Several potential full-duplex system architectures that are appropriate for different application spaces are discussed. Specific research advances include (i) a novel integrated CMOS non-reciprocal circulator that utilizes time-variance to break Lorentz reciprocity, (ii) a polarization-based antenna cancellation technique that achieves very wideband isolation that can be reconfigured as the environment changes, (iii) several generations of RF and analog self-interference cancellation circuits that combat noise, distortion and bandwidth limitations, (iv) higher-layer resource allocation algorithms that evaluate full-duplex rate gains given realistic physical layer models, and (v) demonstrations of full-duplex operation using realistic IC-based nodes.
Archimedes: an approach to architecture-independent modeling for high-level simulation (2003)

A means of describing computer models on a high level and a means of generating the necessary data about the model for simulation are presented. The method is exemplified by using it to describe a RISC processor model. The debugging environment and interfaces for the simulator are presented. The use of the simulator to evaluate the performance of the HITAC M-880 multiprocessor system is reported.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Metastability of the Isolated Arsenic-Antisite Defect in GaAs (1988)

We propose that a neutral As-antisite defect in GaAs has a stable fourfold and a metastable, threefold interstitial configuration differing by 0.24 eV in their energies. The barrier height from the metastable to the normal state is calculated to be 0.34 eV. The metastable geometry is predicted to have a low optical excitation probability and to be electron-paramagnetic-resonance inactive. The two structural states of the antisite provide the simplest explanation for the unusual properties of the $\mathrm{EL}2$ defect center in GaAs.
Pharmacological Induction of Fetal Hemoglobin Synthesis using Histone Deacetylase Inhibitors (2004)

A number of pharmacological agents are currently available for the induction of the fetal hemoglobin (Hb F) to treat the patients with sickle cell disease and beta-thalassemia. In the present review, we summarized the investigation and development of these Hb F-inducing agents and introduced histone deacetylase inhibitors as the new strategy to induce Hb F to treat the hemoglobin disorders
Vision–IMU Integration Using a Slow-Frame-Rate Monocular Vision System in an Actual Roadway Setting (2010)

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> We present results of an effort where position and orientation data from vision and inertial sensors are integrated and validated using data from an actual roadway. Information from a sequence of images, which were captured by a monocular camera attached to a survey vehicle at a maximum frequency of 3 frames/s, is fused with position and orientation estimates from the inertial system to correct for inherent error accumulation in such integral-based systems. The rotations and translations are estimated from point correspondences tracked through a sequence of images. To reduce unsuitable correspondences, we used constraints such as <emphasis emphasistype="boldital">epipolar lines</emphasis> and <emphasis emphasistype="boldital">correspondence flow directions</emphasis>. The vision algorithm automatically operates and involves the identification of point correspondences, the pruning of correspondences, and the estimation of motion parameters. To simply obtain the geodetic coordinates, i.e., latitude, longitude, and altitude, from the translation-direction estimates from the vision sensor, we expand the Kalman filter space to incorporate distance. Hence, it was possible to extract the translational vector from the available translational direction estimate of the vision system. Finally, a decentralized Kalman filter is used to integrate the position estimates based on the vision sensor with those of the inertial system. The fusion of the two sensors was carried out at the system level in the model. The comparison of integrated vision–inertial-measuring-unit (IMU) position estimates with those from inertial–GPS system output and actual survey demonstrates that vision sensing can be used to reduce errors in inertial measurements during potential GPS outages. </para>
Binding of the T Cell Activation Monoclonal Antibody Ta1 to Dipeptidyl Peptidase IV (1990)

The monoclonal antibodies, Ta1 and IOT15, define T cell activation cell surface markers and have been assigned to the CD26 leukocyte differentiation antigen cluster. Dipeptidyl peptidase IV (DPP IV, EC 3.4.14.5) is an exoaminopeptidase that, among leukocytes, is expressed almost exclusively on activated T cells. Comparative binding studies showed that the Ta1 mAb binds to DPP IV purified from human placenta as well as in extracts of the human YT lymphoid cell line and of CD3 stimulated normal human peripheral blood mononuclear cells. The mAb IOT15 did not bind to DPP IV from any source even upon repeated incubations. Western blot analysis of YT cell extracts revealed that Ta1 and IOT15 bound to distinctly different molecular weight molecules. Immunofluorescent cell surface capping experiments showed that capping of the IOT15 did not alter the surface distribution of the Ta1 fluorescence. The capping results combined with the DPP IV binding results indicate that IOT15 and Ta1 mAb's bind to different, apparently unassociated, molecules on the surface of T cells and that only Ta1 binds the T cell surface enzyme DPP IV.
Adaptive FEC-Based Packet Loss Resilience Scheme for Supporting Voice Communication over Ad hoc Wireless Networks (2008)

Providing real-time voice support over multihop ad hoc wireless networks is a challenging task. To make a voice application feasible over ad hoc wireless networks, the perceived voice quality must be improved while not significantly increasing the packet overhead. We suggest packet-level media-dependent adaptive forward error correction (FEC) at the application layer in tandem with multipath transport for improving the voice quality. Since adaptive FEC masks packet losses in the network, at the medium access control (MAC) layer, we avoid retransmissions in order to reduce the control overhead and end-to-end delay. Further, we exploit the combined strengths of layered coding and multiple description (MD) coding for supporting error resilient voice communication in ad hoc wireless networks. We propose an efficient packetization scheme in which the important sub-stream of the voice stream is protected adaptively with FEC depending on the loss rate present in the network and is transmitted over two maximally node-disjoint paths. Our scheme achieves significant gains in terms of reduced frame loss rate, reduced control overhead, and minimum end-to-end delay and almost doubles the perceived voice quality compared to the existing approaches.
Determination of trace of total silicon in high-purity copper by molybdosilicate spectrophotometric method after generation as silicon fluoride (2002)

高純度銅中の微量ケイ素定量はJIS法では対応できない. また, 二酸化ケイ素の状態で含まれるケイ素についても対象外である. そこで二酸化ケイ素を含む全ケイ素の定量にフッ化物分離法の適応を検討した. 二酸化ケイ素を分解して四フッ化ケイ素を生成するのに必要なフッ化水素酸量等, 最適条件について詳細に検討を行った. その結果, 二酸化ケイ素の状態を含むサブppmのケイ素定量が可能となった. また, 試料量0.5gのときの検出限界は0.1ppmであった.
Studies on Tetanus toxin and toxoid (1969)

Tetanus toxin prepared from toxic filtrates of Clostridium tetani cultures has a weight-average molecular weight of 176,000±5,000 and exhibits no detectable heterogeneity with regard to size and shape. No marked change in sedimentation properties is observed on varying pH and temperature over a selected range, but the sedimentation coefficient increases on decreasing the ionic strength.
Inelastic processes in time dependent tunneling in a scanning tunneling microscope junction (1994)

Experiments on frequency mixing and tunneling time measurements have stirred renewed interest in the problem of tunneling through time dependent barriers in a vacuum diode configuration such as the scanning tunneling microscope (STM) junction. In the present work we have formulated a theory of photoassisted emission for a planar bimetallic junction with both a static dc voltage and a time dependent bias of angular frequency ω. An expression for the current is derived using kinetic theory and the transfer Hamiltonian method. The wave functions are determined from time dependent perturbation theory and are calculated recursively to infinite order. Although the current is initially calculated within the free-electron model, this kinetic formalism allows for the inclusion of band-structure effects through the density of states factors. The photoassisted inelastic tunneling current was calculated as a function of frequency, fields, barrier parameters, and material asymmetry. The results are applied to an analysis of the tunneling time experiments of Nguyen et al. [H. Q. Nguyen et al., IEEE Trans. Electron Devices 36, 2671 (1989)]. The conclusions impose some constraints but do not limit the experimental procedure used for extracting tunneling times in an irradiated STM junction.
Spatial modulation over partially coherent multiple-input/multiple-output channels (2003)

Communication over multiple-input/multiple-output (MIMO) channels of arbitrary coherence is considered in light of a mean square estimation error (MSEE) criterion. Earlier work in the field has focused on fully coherent channels and determined that use of a singular value decomposition (SVD) of the channel transfer function matrix can realize the capacity of the MIMO channel. More recently, research has shown that the use of arbitrary orthonormal channel excitation vectors can maximize expected capacity over fully incoherent Rayleigh fading MIMO channels. Partially coherent channels have generally been examined only in terms of their degrading influence on capacity. In this discussion, channel excitation techniques are proposed that minimize an MSEE criterion over an ensemble of MIMO channels of arbitrary coherence. The algorithms rely on only the second-and fourth-order moments of the channel transfer function. Two experiments were conducted to examine the new strategies. Using measured MIMO channel transfer function ensembles-one from an underwater acoustic channel and others from RF wireless channels-the performance of the strategies are compared. The new techniques outperform orthonormal signaling based on SINR or capacity metrics while requiring substantially less channel feedback than needed by a channel decomposition approach.
Design and development of wireless flow transmitter (2016)

This paper presents the development of a wireless flow transmitter using rotameter and operational amplifier based signal conditioning circuit. The rotameter is a linear gravity based flow measuring device. It consists of a display unit which directly displays the flow rate. For industrial applications a new circuitry is required to transmit the measured flow rate to the control unit at remote areas. A ferromagnetic wire attached to the float of rotameter acts as a core of an inductance pickup coil constitutes the flow sensor. The self-inductance of the coil changes according to the change in flow rate. An operational amplifier based circuit is used for the measurement of self-inductance. The voltage corresponding to the flow rate is finally converted into 4–20 mA current. A wireless readout is provided using a microcontroller unit and a Bluetooth module. The results show a linear relation between the variation of self-inductance of a pickup coil as well as transmitter output with respect to flow rate. The theoretical equations and the simulation results are added in this paper.
Release of Surfactant Cargo from Interfacially-Active Halloysite Clay Nanotubes for Oil Spill Remediation (2014)

Naturally occurring halloysite clay nanotubes are effective in stabilizing oil-in-water emulsions and can serve as interfacially-active vehicles for delivering oil spill treating agents. Halloysite nanotubes adsorb at the oil-water interface and stabilize oil-in-water emulsions that are stable for months. Cryo-scanning electron microscopy (Cryo-SEM) imaging of the oil-in-water emulsions shows that these nanotubes assemble in a side-on orientation at the oil-water interface and form networks on the interface through end-to-end linkages. For application in the treatment of marine oil spills, halloysite nanotubes were successfully loaded with surfactants and utilized as an interfacially-active vehicle for the delivery of surfactant cargo. The adsorption of surfactant molecules at the interface serves to lower the interfacial tension while the adsorption of particles provides a steric barrier to drop coalescence. Pendant drop tensiometry was used to characterize the dynamic reduction in interfacial tension resulting from the release of dioctyl sulfosuccinate sodium salt (DOSS) from halloysite nanotubes. At appropriate surfactant compositions and loadings in halloysite nanotubes, the crude oil-saline water interfacial tension is effectively lowered to levels appropriate for the dispersion of oil. This work indicates a novel concept of integrating particle stabilization of emulsions together with the release of chemical surfactants from the particles for the development of an alternative, cheaper, and environmentally-benign technology for oil spill remediation.
A High Power C.W. Travelling-wave Tube† (1962)

ABSTRACT This paper describes a ‘ clover loaf ’ C.W. travelling-wave amplifier with a power output of the order of 5 kw over a voltage tuning range of about 5% in the 3 cm band. The tube is designed to operate with its collector at a negative potential, thus enhancing its efficiency, and the application of this technique to high power tubes is discussed in some detail.
Layer 3 VPNv4 Traffic Balancing Mechanism Scenario (2018)

The present paper underlines the purpose of IP/MPLS (Internet Protocol/Multiprotocol Label Switching) networks: implementing algorithms that can create equilibrium in the traffic that flows through the communication equipment to broadly develop the world of information. The use of Layer 3 MPLS VPNv4 (Virtual Private Network version 4) offers scalability and the ability to separate the network into smaller ones. The contributions brought by the paper underline the fact that in MPLS networks there is the possibility of coordinated provisioning, automatic bandwidth allocation for the MPLS tunnels and an enhanced protection.
Antibody response to outer membrane proteins of Moraxella catarrhalis in children with otitis media (1999)

A combination of antigens might form the most suitable basis for a M. catarrhalis vaccine designed to prevent otitis media in this age group.
Formation of poliomyelitis subviral particles in the yeast <i>Saccharomyces cerevisiae</i> (1994)

The sequence of the poliovirus genome encoding 3CD (a protease) was transferred to the yeast Saccharomyces cerevisiae on expression vectors with either a constitutive or an inducible promoter. Transformants could only be obtained with vectors carrying the inducible transcription unit. Extracts of induced cells were able to cleave cell-free synthesized P1, the precursor of the poliovirus capsid proteins, into VP0, VP3 and VP1. In yeast cells constitutively expressing P1, induction of 3CD expression resulted in only trace amounts of processed products. Processing could be improved considerably by simultaneous induction of both P1 and 3CD expression. Analysis of extracts of such induced cells revealed the presence of particles that resembled authentic subviral particles.
Zinc-oxide thin-film surface-wave transducers (1976)

The piezoelectric film layer transducer represents the most efficient method for generating and detecting surface acoustic waves on nonpiezoelectric substrates. ZnO, which has a strong piezoelectric effect and can readily be sputtered as an oriented crystalline composite on a wide variety of substrates, is a natural choice as the piezoelectric film layer. This paper summarizes a body of knowledge which has been developed on the characteristics of transducer quality ZnO film layers, and focuses attention on those sputtering parameters and microstructural properties which characterize a superior surface-wave transducer film. Requisite sputtering conditions are high substrate temperatures (150-300°C), modest deposition rates (0.5-1.0 µm/h), low background vapor pressures (<5 µm Hg) and an ultraclean vacuum system. Transducer quality surface-wave films are characterized by their optical clarity, high density, smooth surface, small crystallite size, and well-oriented crystallite axes. Such ZnO films will play an important role in future surface acoustic wave device technology.
New Ianthelliformisamine Derivatives as Antibiotic Enhancers against Resistant Gram-Negative Bacteria (2014)

A series consisting of ianthelliformisamimes A, B, and C as well as its synthetic analogues was prepared in high chemical yield, from 27 to 91%, using peptide coupling as the key step, and the compounds were evaluated for their in vitro antibiotic enhancer properties against resistant Gram-negative bacteria and clinical isolates. The mechanism of action of one of these derivatives against Pseudomonas aeruginosa when combined with doxycycline was precisely evaluated utilizing bioluminescence to measure ATP efflux and fluorescence to evaluate membrane depolarization.
Quasi min-max model predictive control for Hammerstein system over networks with packet losses (2017)

In this paper, a constrained model predictive control (MPC) approach is presented for the networked control systems (NCSs) containing Hammerstein nonlinearity and bounded packet losses. The Hammerstein nonlinearity is partially removed by establishing its pseudo-inverse, and the remaining weaker nonlinearity is tackled by the polytopic description. The model of NCS is constructed from the standpoint of robust control, which transforms the stabilisation of the control systems with packet losses into the stabilisation of a set of subsystems. The constrained networked MPC approach is given by parameterising the infinite horizon control moves into a free control move followed by a state feedback law which the input and state constraints are explicitly considered. Compared with the networked MPC without free control move, the presented approach improves the control performance of the closed-loop system, which is verified by a comparison simulation example.
Epoxidation of olefins by cytochrome P-450 model compounds: kinetics and stereochemistry of oxygen atom transfer and origin of shape selectivity (1985)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEpoxidation of olefins by cytochrome P-450 model compounds: kinetics and stereochemistry of oxygen atom transfer and origin of shape selectivityJames P. Collman, John I. Brauman, Bernard Meunier, Teruyuki Hayashi, Thomas Kodadek, and Scott A. RaybuckCite this: J. Am. Chem. Soc. 1985, 107, 7, 2000–2005Publication Date (Print):April 1, 1985Publication History Published online1 May 2002Published inissue 1 April 1985https://pubs.acs.org/doi/10.1021/ja00293a034https://doi.org/10.1021/ja00293a034research-articleACS PublicationsRequest reuse permissionsArticle Views589Altmetric-Citations156LEARN 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
Hash-based symmetric data structure and join algorithm for OLAP applications (2003)

The star schema is often used in dimensional approaches applied to OLAP applications. The fact table in the star schema typically contains a huge amount of data. When some of the dimension tables are also very large, it may take too much time and storage to join the fact table with these dimension tables. The performance of the join algorithm becomes critical under such a condition. The fluent join is a join algorithm that operates on relations organized as multidimensional linear hash files. Like a merge join on relations which are already sorted on the joining key, its execution reads each page in the operand relations no more than once and does not create intermediate result files. Unlike sorting, the multi-dimensional linear hash can cluster records in several keys symmetrically. In this paper, the concept of the fluent join is applied to an OLAP system to cluster records in each table on the joining keys. As a result, the algorithm yields symmetric performances on joins with different dimension tables.
Divided Representation of Concurrent Goals in the Human Frontal Lobes (2010)

The anterior prefrontal cortex (APC) confers on humans the ability to simultaneously pursue several goals. How does the brain's motivational system, including the medial frontal cortex (MFC), drive the pursuit of concurrent goals? Using brain imaging, we observed that the left and right MFC, which jointly drive single-task performance according to expected rewards, divide under dual-task conditions: While the left MFC encodes the rewards driving one task, the right MFC concurrently encodes those driving the other task. The same dichotomy was observed in the lateral frontal cortex, whereas the APC combined the rewards driving both tasks. The two frontal lobes thus divide for representing simultaneously two concurrent goals coordinated by the APC. The human frontal function seems limited to driving the pursuit of two concurrent goals simultaneously.