gebhart/patrepeval huggingface dataset:
In-plane resonant excitation of quantum dots in a dual-mode photonic-crystal waveguide with high β-factor (2022)

Abstract A high-quality quantum dot (QD) single-photon source is a key resource for quantum information processing. Exciting a QD emitter resonantly can greatly suppress decoherence processes and lead to highly indistinguishable single-photon generation. It has, however, remained a challenge to implement strict resonant excitation in a stable and scalable way, without compromising any of the key specs of the source (efficiency, purity, and indistinguishability). In this work, we propose a novel dual-mode photonic-crystal waveguide that realizes direct in-plane resonant excitation of the embedded QDs. The device relies on a two-mode waveguide design, which allows exploiting one mode for excitation of the QD and the other mode for collecting the emitted single photons with high efficiency. By proper engineering of the photonic bandstructure, we propose a design with single-photon collection efficiency of β > 0.95 together with a single-photon impurity of ϵ < 5 × 10 −3 over a broad spectral and spatial range. The device has a compact footprint of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"> <mml:mo>∼</mml:mo> <mml:mn>50</mml:mn> <mml:mspace class="nbsp" width="0.3333em"/> <mml:mi>μ</mml:mi> <mml:msup> <mml:mrow> <mml:mi mathvariant="normal">m</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>2</mml:mn> </mml:mrow> </mml:msup> </mml:math> and would enable stable and scalable excitation of multiple emitters for multi-photon quantum applications.
Regenerative amacrine cell depolarization and formation of on‐off ganglion cell response. (1977)

1. Recordings from amacrine and ganglion cells in the mudpuppy retina suggest mechanisms whereby the relatively slow, sustained light responses measured in bipolar cells are converted to rapid, brief, transient activity in the on-off ganglion cells. 2. Double-barrel electrodes were used to control the membrane potential under voltage clamp. The clamp revealed synaptic currents, but eliminated the otherwise obvious spike activity elicited by steps of illumination in both amacrine and ganglion cells, suggesting that the spikes are initiated near the somata. 3. The synaptic current in the on-off ganglion cells was biphasic: a brief inward (depolarizing) membrane current preceded a transient outward (hyperpolarizing) membrane current by about 20 msec. Each component could be isolated by polarizing the membrane to a level near the reversal potential for the other. Each was apparently due to a transient conductance increase of sawtooth shape with a 40 msec time to peak and a decay longer than 400 msec. 4. Synaptic membrane current in amacrine cells was monophasic and inward (depolarizing) of similar sawtooth shape at all potential levels. It was apparently mediated by a conductance increase to ions with a reversal potential more positive than the dark level. 5. When amacrine cells were depolarized in the dark under voltage clamp, a large transient inward membrane current with threshold within 4 mV of the dark level was generated. This regenerative event is capable of boosting a small, 4 mV e.p.s.p. to more than 30 mV in a few milliseconds, thereby generating the leading edge of a rapid sawtooth response. 6. The results suggest that the rapid transient on-off activity in ganglion cells is mediated by opposing sawtooth shaped synaptic currents with different latencies. It is inferred that each of these antagonistic imputs is generated by a regenerative depolarization in amacrine cells which then form synaptic inputs to the ganglion cells.
Functions and Convergence (2004)

A piecewise continuous function f(x) defined on an interval I is bounded (or L ∞) on I if there is a number M > 0 such that |f(x)| ≤ M for all x ∊ I.
Hematologic effects of exposure to three infective agents in rabbits (1989)

Infectious disease is typically accompanied by changes in the number and types of circulating leukocytes. To examine the effects of infectious challenge on the distribution of rabbit WBC, rabbits were inoculated IV with Streptococcus pyogenes, Escherichia coli, or Candida albicans. Blood was collected prior to and every 6 to 12 hours after inoculation for 48 hours. Infectious challenge did not substantially alter total WBC counts, but did cause neutrophilia and lymphopenia for 6 to 48 hours after inoculation. Similar patterns of leukocyte distribution were observed in rabbits with naturally developing clinical problems. Thus, high total WBC counts may not be a common characteristic of acute infectious conditions in rabbits, but differential distributions of various leukocyte populations can provide useful markers of disease in this species.
Measurement of Error Vector Magnitude (EVM) to Characterize the Impairment of the Tracking and Data Relay Satellite (TDRS) Channel (2016)

A digital signal is transmitted via a carrier wave, it demodulates at a receiver, and locates at an ideal constellation point. However, noise distortion, carrier leakage, and phase noise can force a signal to divert from its ideal position to a new position. Consequently, the performance of the signal is decreased. Bit Error Rate (BER) and Error Vector Magnitude (EVM) measurement techniques are used to enable the analysis and assessment of the extent to which the performance of a signal has been decreased. In this paper, we present the EVM measurement technique as a figure of merit to analyze and evaluate the performance of a User Services Subsystem Component Replacement (USSCR) modem. Also, we demonstrate the use of the EVM measurement technique in a Tracking and Data Relay Satellite (TDRS) system to measure and evaluate channel impairment between a satellite (transmitter) and the ground terminal (receiver) at the White Sands Complex.
[Genetic counseling in presymptomatic testing for Huntington disease]. (2000)

Norwegian law and international guidelines require genetic counselling before, during and after presymptomatic testing for Huntington's disease. The genetic counselling of at-risk persons who considers taking tests, includes explanation of the possible implications of a test result for both participant and relatives. The test is performed only when explicitly requested by the participant and after informed consent. The participant decides if and when the test should be conducted. The participant also has major influence on the timing of the consecutive phases of the testing procedure, in compliance with medical and ethical recommendations. This paper reviews main issues raised during genetic counselling and the preparation period preceding the test and communication of the test result. We illustrate different individual situations and backgrounds for considering presymptomatic testing for Huntington's disease by describing three anonymized cases and associated pedigrees.
LACK OF SPECIFIC CELL MEDIATED IMMUNITY TO CYTOMEGALOVIRUS IN PEOPLE AT RISK FOR AIDS (1983)

Twenty apparently healthy homosexuals from Italy and five patients with lymphadenopathic syndrome (LAS) were studied for specific cell mediated immunity (CMI) to Cytomegalovirus (CMV), by means of the leukocyte migration inhibition test (LMIT). Total circulating T cells and T cell subpopulations were also investigated by the use of specific monoclonal antibodies of the OK series. An inverted OKT4/T8 ratio was also found in about 30% of subjects. CMV was recovered from the urine of three homosexuals and high specific antibody titers were found in all the people studied. In addition we found a lack of specific CMI to CMV in 18 homosexuals and in 3 patients with LAS. We think that CMV can induce a state of immune tolerance in people at risk for AIDS which may contribute to promote the disease.
Formic acid pretreatment enhances immunostaining of cerebral and systemic amyloids. (1987)

The purpose of this study was to design a method by which immunoperoxidase staining can be applied to formalin-fixed, paraffin-embedded tissue sections to demonstrate amyloid deposits in cerebral and systemic amyloidotic tissues. We used anti-prion protein, anti-beta-protein, anti-amyloid A, and anti-prealbumin antisera. The tissue sections were first treated with 100% formic acid for 5, 20, or 60 minutes and the unlabeled immunoperoxidase method (biotin-streptavidin system reagents) was used. This formic acid pretreatment enhanced immunoreactivity of the amyloid deposits which reacted positively with specific antiserum. The specificity of the immunostainings was well preserved. This method can also be used to demonstrate interspecies cross-reactivity, by using anti-human amyloid A and anti-scrapie hamster prion protein antisera, which stained negatively or faintly with amyloid deposits of heterogenous species. The technique is expected to reveal the buried epitopes of amyloid deposits in tissue sections.
Influence of Changes in Central Core on the Mesomorphic Properties of 4,4′-Dialkoxy-2,2′-Dihydroxybenzalazine and Derivatives (1984)

Abstract Two new series of compounds that have mesomorphic properties were synthesized: the 4,4′-dialkoxy-2,2′-dihydroxy-a-methylbenzalazines and the 4,4′-dialkoxy-2,2′-dihy-droxybenzalazines. The first series shows crystalline and smectic polymorphism. A comparative study of the mesomorphic properties of these series with those of the 4,4′-dialkoxy-2,2′-dihydroxy-α,α'-dimethylbenzalazines was carried out to establish the influence of the central groups on the mesomorphic properties.
Solubility of Fluorides of Metals in Liquid Hydrogen Fluoride (1952)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolubility of Fluorides of Metals in Liquid Hydrogen FluorideAlbert W. Jache and George H. CadyCite this: J. Phys. Chem. 1952, 56, 9, 1106–1109Publication Date (Print):September 1, 1952Publication History Published online1 May 2002Published inissue 1 September 1952https://doi.org/10.1021/j150501a018RIGHTS & PERMISSIONSArticle Views539Altmetric-Citations55LEARN 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 InReddit PDF (531 KB) Get e-Alerts
Novel Zinc and Magnesium Alkyl and Amido Cations for Ring-Opening Polymerization Reactions (2004)

The reaction of [H(OEt2)2][B(C6F5)4] with Zn[N(SiMe3)2]2, MgBu2, and {Mg[N(SiMe3)2]2}2 in diethyl ether proceeds in very high yields to give the salts [(Et2O)3ZnN(SiMe3)2][B(C6F5)4] (2), [(Et2O)3MgnBu][B(C6F5)4] (3), and [(Et2O)3MgN(SiMe3)2][B(C6F5)4] (4), respectively. The structures of 2 and 4 were determined by X-ray crystallography; the compounds contain distorted-tetrahedral metal centers and are isostructural. [(Et2O)3ZnCH2CH3][B(C6F5)4] (1) as well as 2−4 catalyze the ring-opening polymerization of epoxides and ε-caprolactone. Cyclohexene oxide is polymerized extremely rapidly to high molecular weight materials, while the polymerization of propene oxide gives low molecular weight materials via a cationic mechanism. The zinc species are more stable than their magnesium analogues and show higher productivities. ε-Caprolactone is polymerized efficiently to high molecular weight polymers.
The association between acidification and electrogenic events in the rat proximal jejunum (1976)

1. Simultaneous measurement of hydrogen ion production, transmural potential difference and intermittent short‐circuit current (SCC) was made in the rat proximal jejunum in vitro : similarly, potassium and sodium ion movements were measured to investigate the relationship of acidification to electrogenic events and associated ion movements in the jejunum. 2. Acidification correlated significantly with the short‐circuit current and both were inhibited by 10 m M serosal ouabain or 10 m M mucosal aminophylline. Both inhibitors had effects on net potassium movement but not on net sodium movement. Moreover, in isotope studies whereas 10 m M serosal ouabain reduced the J ms sodium flux, 10 m M mucosal aminophylline had no effect, i.e. aminophylline can reduce both short‐circuit current and acidification without perceptibly altering the serosally directed sodium flux. 3. In low‐sodium buffers in which acidification still occurs although reduced, transmural potential differences occur of reversed polarity that are apparently unrelated to sodium diffusion potential differences (as evidenced by isotopic sodium efflux experiments) and which could be caused by hydrogen ion production. In low sodium buffers however the inhibitors have opposing effects, ouabain causing an increase and aminophylline a decrease in the reversed potential differences. 4. A model for acidification (that of potassium rather than sodium ion exchange for the hydrogen ion and hydroxyl for chloride ion exchange) is proposed to explain the present experimental findings and other diverse observations in the literature: although either step might be the electrogenic step, acidification must be also considered as a component of the jejunal short‐circuit current.
Geometric Aspects of the Covariance Partial Realization Problem (1993)

In this paper, both Euclidean geometric and non-Euclidean geometric descriptions for the regions of the solution set to the covariance partial realization problem are discussed. In particular, it is shown that all the solution functions are located inside a Euclidean disk - the Weyl disk, and a non-Euclidean disk - the Apollonian disk. The radius of each disk depends on the norm of the parameterizing Schur functions. Moreover, it is pointed out that the well known maximum entropy solution is exactly the hyperbolic center of the Apollonian disk; while, the associated power spectral density function is the geometric mean center of the real region where the Weyl disk is projected to along the imaginary axis. Sensitivity analysis of the Weyl disk radius and Apollonian disk center due to the perturbation of the given finite covariance data is presented.
Polymer Electrolyte Fuel Cell Electrodes Grown by Vapor Deposition Techniques (2011)

Abstract Polymer fuel cell electrode growth using vapor deposition techniques is reviewed. The supports, the nanocatalyst sizes and morphologies, and the resulting electrodes are examined as a function of the vapor deposition process; sputtering, CVD, plasma‐enhanced (PE)CVD, and metal‐organic (MO)CVD. In each case, up‐to‐date fuel cell performances are highlighted. Vapor depositions are valuable techniques for designing fuel cell electrodes of various kinds with good fuel cell performances, e.g., power density and catalyst activity
Decreased serum <scp>CA</scp>19‐9 is associated with improvement of insulin resistance and metabolic control in patients with obesity and type 2 diabetes after Roux‐en‐Y gastric bypass (2014)

CA19-9 could be an effective indicator of IR, and glycemic and lipid metabolism in patients with obesity and type 2 diabetes after rapid metabolic control by RYGB. Additionally, CA19-9 might be a marker with which to evaluate the short-term effects of glycolipid toxicity on IR in these patients.
A comparison of the results of single photon emission tomographic acquisition with circular, elliptical, and contoured orbits (1985)

The resolution of single photon emission tomographic (SPECT) systems is improved as the distance from source to the collimator is decreased. For this reason, rotating tomographic systems that can move in noncircular orbits have been developed. Software was developed for such a system that allows the selection of circular, elliptical, or contoured orbits. With this system, the path of the camera is determined prior to the actual acquisition. In order to test the efficacy of ellipticl and contoured orbits, two cold spot phantoms were imaged. In reconstructions, the contrast of small cold spots ( 60% for elliptical orbits over circular, and further increased by 25-70% for contoured over elliptical orbits. The contrast of larger objects did not improve as dramatically. Elliptical orbits gave a 21-100% improvement over circular orbits, and contoured orbits gained an additional 5-29%. Profiles through the cold spots indicated that peak widths were narrower for contoured orbits than for elliptical orbits primarily for small objects. Setup time for elliptical orbits required little additional time compared to traditional circular orbits; contoured orbits required substantially longer preparation. Actual acquisition times, however, were approximately the same for each. Elliptical orbits may offer a good compromise betweenmore » total table time and resolution.« less
Synthesis and structural characterization of two novel heterometallic clusters: [Rh4Pt2(CO)11(dppm)2] and [Ru2Rh2Pt2(CO)12(dppm)2] (2004)

Two novel heterometallic octahedral clusters [Rh(4)Pt(2)(CO)(11)(dppm)(2)](1) and [Ru(2)Rh(2)Pt(2)(CO)(12)(dppm)(2)](2) were synthesized by the reaction of [Rh(2)Pt(2)(CO)(6)(dppm)(2)] with [Rh(6)(CO)(14)(NCMe)(2)] and Ru(3)(CO)(12), respectively. Solid state structures of 1 and 2 have been established by a single crystal X-ray diffraction study. Two dppm ligands in 1 are bonded to one platinum and three rhodium atoms, which form an equatorial plane of the Rh(4)Pt(2) octahedron. Two rhodium and two platinum atoms bound to the diphosphine ligands in 2 are nonplanar to give an octahedral C2 symmetric Ru(2)Rh(2)Pt(2)(dppm)2 framework. The (31)P NMR investigation of and (1D, (31)P COSY, (31)P-[(103)Rh] HMQC) and simulation of 1D spectral patterns showed that in both clusters the structures of the M(6)(PP)(2) fragments found in the solid state are maintained in solution.
Treatment of uncomplicated symptomatic urinary tract infections: Resistance patterns and misuse of antibiotics (2015)

UTI can be over diagnosed and over treated on the basis of clinical signs, symptoms and urine microscopy. In the era of emerging anti-microbial resistance, effective counseling and delay in antibiotic initiation or empirical therapy with a short course of nitrofurantoin is highly recommended. Empirical therapy guidelines should be updated periodically to reflect changes in antimicrobial resistance of uropathogens.
The induction of IL-6 and gelatinase B by IL-1 in mouse cell lines transformed with bovine papillomavirus: decreased production in tumorigenic cells. (1992)

Six cell lines, that were cloned from murine C127 cells infected by bovine papillomavirus type 1 (BPV1), were found to differ in the degree of transformation in vitro and of tumorigenicity in vivo. In these cell lines the degree of tumorigenicity was inversely correlated with IL-6 induction by IL-1 beta. Whereas the parental C127 cell line produced 15-30 U/ml of IL-6 spontaneously, none of the transformed cell lines produced significant levels of IL-6 constitutively. On induction by human IL-1 beta the parental C127 cell line produced up to 300 U/ml of IL-6, whereas the fully transformed ID14 cell line failed to produce any. The less transformed cell lines produced lower yields of IL-1 beta-induced IL-6, dependent on their degrees of transformation and tumorigenicity. Gelatinase B (96 kDa), a matrix metalloproteinase inducible by IL-1 beta, was dose-dependently regulated in the parental C127 cell line and in the weakly transformed cell line Tlc. These data suggest that transformation processes by BPV1 generally impair IL-1-regulated gene transcription. This impairment seems not to be located at the IL-1 beta receptor level, since in all the cell lines studied the numbers and affinities of the IL-1 beta binding sites were found to be comparable. This impairment seems not to be mediated by transformation-induced inactivation of the protein kinase C pathway since phorbol 12-myristate 13-acetate (PMA) induced IL-6 production equally well in all C127 cell-derived clones. It is suggested that BPV1 transformation can change the expression of host genes that might play a functional role in tumor immune surveillance and tumorigenicity in vivo.
Analysis of the shut-off of ribosomal RNA promoters in<i>Escherichia coli</i>upon entering the stationary phase of growth (1996)

Most bacterial RNA consists of stable RNA which is composed of rRNA and tRNA. We have followed by primer extension analysis the level of ribosomal RNA synthesis along the growth phases of a cell culture. A sharp drop in rRNA synthesis was observed upon the transition from the exponential to the stationary phase of growth. Our results demonstrate that an effective shut-off of rRNA synthesis occurs also in the absence of ppGpp. Mutations in the host factors Fis and H-NS, which are known to regulate rrn P1 promoters, did not affect the shut-off process of ribosomal RNA promoters. We also tested the effect of RpoS, the sigma factor known to induce a number of genes in the stationary phase. It was shown that the host factors Fis, H-NS and RpoS do not play a major role in the regulation of the shut-off process of rRNA synthesis. The results presented demonstrate that the rate of rRNA synthesis provides a sensitive measure of the growth phase of the bacterial culture.
The Role of Flame Shape and Burner Configuration in Emission Analysis (1969)

A simple derivation can show that the effect of flame shape, multiple flames, and multi-pass optical systems should be the same for flame emission intensity as for atomic absorption response. Experimental evidence confirms the prediction and shows that the steps used to increase atomic absorption response are directly applicable to emission measurements. Increased emission intensities reduce noise levels and lower detection limits by lowering the required electrical gain and by permitting the use of narrower spectrometer slits. The improvement in detection limits from the use of narrow slits depends on the background structure in the vicinity of the line. Three cases are considered in detail.
MONITORING WEAVING SECTIONS (2001)

This paper presents algorithms for vision-based monitoring of weaving sections. These algorithms have been developed for the Minnesota Department of Transportation in order to acquire data for several weaving sections in the Twin Cities Area. Unlike commercially available systems, the proposed algorithms can track and count vehicles as they change lanes. Furthermore, they provide the velocity and the direction of each vehicle in the weaving section. Experimental results from various weaving sections with various weather conditions are presented. The proposed methods are based on the establishment of correspondences among blobs and vehicles as the vehicles move through the weaving section. The blob tracking problem is formulated as a bipartite graph