gebhart/patrepeval huggingface dataset:
Anti-Agglomerant Hydrate Inhibitors for Prevention of Hydrate Plugs in Deepwater Systems (2000)

Abstract Anti-agglomerant low dosage hydrate inhibitors (LDHI’s) give operators an additional tool for controlling hydrates in their systems. In contrast to kinetic and thermodynamic hydrate inhibitors, anti-agglomerant LDHI’s inhibit hydrate plugging, rather than hydrate formation. Thus anti-agglomerant LDHI’s allow hydrates to form but keep the particles small and well dispersed. Fluid viscosity remains low, allowing the hydrates to be transported along with the produced fluids. Emulsification of the produced fluids is not necessary; in fact, anti-agglomerant LDHI’s have aided in demulsifying several black oil emulsions. In the laboratory, anti-agglomerant LDHI’s have been shown to be effective up to 40 °F below the hydrate formation temperature, at pressures up to 7000 psi, and for shut-ins up to two weeks in duration. In addition, extensive laboratory testing and formulation work have been performed to ensure that the anti-agglomerant LDHI’s are compatible with system metals, elastomers, and treatment chemicals, and that the products will not plug umbilicals nor cause upsets in surface facilities. After a comprehensive laboratory evaluation, an anti-agglomerant LDHI was selected for field testing in a deepwater, Gulf of Mexico oil well. The product protected the system throughout the 1.5 month trial, including two brief shut-ins. This paper presents the results of the laboratory and field tests.
Security and lifespan improve the performances of HV/LV transformer substations (2009)

The aim of this paper is to show the approach carried out by the HV/LV prefabricated substation department from Areva T&D to obtain a total-security and to minimise the environmental impact of these products at the end of their life, and this in accordance to the latest requirements from the standard of the HV/LKV prefabricated substation [1]. This approach necessitates the breakdown of each of the stages from design to commissioning of this products. These transformer substations, up to now considered as an enveloped enclosing electrical equipment, are involved in the revelation of the performance of the whole assembly. Throughout the paper various test results will confirm each hypothesis.
Stability of a class of interconnected evolution systems (1992)

Stability conditions for a class of interconnected systems modeled by linear abstract evolution equations and a memoryless nonlinearity are derived. These conditions are stated in terms of the passivity of each of the subsystems and can be considered as a partial generalization of the hyperstability theorem. A Lyapunov function approach is used in the proof without requiring the positive definiteness of the Lyapunov function. Application to the robustness analysis of the infinite-dimensional linear quadratic regulator is also discussed.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Application of A150-plastic equivalent gases in microdosimetric measurements (1981)

Neutron dosimetry measurements with ionization chambers, for the most part, employ tissue equivalent plastic-walled cavities (Shonka A150) filled with either air or a methane-base tissue-like gas. The atomic composition of TE-gas and A150 plastic are not matched and are quite dissimilar from muscle. Awschalom and Attix (1980) have partially resolved the problem by formulating a novel A150-plastic equivalent gas. This establishes a homogeneous wall-gas cavity dosimeter for neutron measurements and confines the necessary corrections to the applications of kerma ratios. In this report, we present measurements of applications of two A150-plastic equivalent gases in a low pressure spherical proportional counter. Gas gains and alpha-particle resolutions were determined. For these A150-mixtures as well as a methane-based TE-gas and an Ar-CO/sub 2/ mixture, we report measurements of event size distributions from exposure to a beam of 14.8 MeV neutrons.
Shared hardware data structures for hard real-time systems (2012)

Hardware support can reduce the time spent operating on data structures by exploiting circuit-level parallelism. Such hardware data structures (HWDSs) can reduce the latency and jitter of data structure operations, which can benefit real-time systems by reducing worst-case execution times (WCETs). For example, a hardware priority queue (HWPQ) can enqueue and dequeue prioritized items in constant time with low variance; the best software implementations are in logarithmic-time asymptotic complexity for at least one of the enqueue or dequeue operations. The main problems with HWDSs are the limited size of hardware and the complexity of sharing it. In this paper we show that software support can help circumvent the size and sharing limitations of hardware so that applications can benefit from a HWDS. We evaluate our work by showing how the choice of software or hardware affects schedulability of task sets that use multiple priority queues of varying sizes. We model task behavior on two applications that are important in real-time and embedded domains: the grey-weighted distance transform for topology mapping and Dijkstra's algorithm for GPS navigation. Our results indicate that HWDSs can reduce the WCET of applications even when a HWDS is shared by multiple data structures or when data structure sizes exceed HWDS size constraints.
Theory and Methodology A heuristic to minimax absolute regret for linear programs with interval objective function coeÅcients (1999)

Decision makers faced with uncertain information often experience regret upon learning that an alternative action would have been preferable to the one actually selected. Models that minimize the maximum regret can be useful in such situations, especially when decisions are subject to ex post review. Of particular interest are those decision problems that can be modeled as linear programs with interval objective function coeAcients. The minimax regret solution for these formulations can be found using an algorithm that, at each iteration, solves first a linear program to obtain a candidate solution and then a mixed integer program (MIP) to maximize the corresponding regret. The exact solution of the MIP is computationally expensive and becomes impractical as the problem size increases. In this paper, we develop a heuristic for the MIP and investigate its performance both alone and in combination with exact procedures. The heuristic is shown to be eAective for problems that are significantly larger than those previously reported in the literature. ” 1999 Elsevier Science B.V. All rights reserved.
Antibody-Mediated Inhibition of Dextran/Sucrose-Induced Agglutination of <i>Streptococcus mutans</i> (1974)

Immune sera to strains of Streptococcus mutans were found to inhibit agglutination of bacterial suspensions to which either high-molecular-weight dextran or sucrose was added. This inhibitory activity was shown to be mediated by antibody of the immunoglobulin G class. A semiquantitative assay was developed which demonstrated cross-inhibition of dextran/sucrose-induced agglutination among several strains of S. mutans. Antiserum to a partially purified glucosyltransferase was found to lack agglutination inhibition activity, consistent with the hypothesis that the dextran-binding antigen detected by the assay is immunologically distinct from the glucan-synthetic enzyme. A model for glucan synthesis and binding consistent with the reported data is described.
Biostimulation of PAH Degradation with Plants Containing High Concentrations of Linoleic Acid (2007)

Many plant species enhance the biodegradation of polycyclic aromatic hydrocarbons (PAHs), but there is little understanding of the mechanisms by which this occurs. This research identified phytochemicals that stimulate pyrene degradation using crushed roottissues from 43 plants that were screened in soil spiked with 100 ppm pyrene. Among the plants tested, root tissues from Apium graveolens (celery), Raphanus sativus (radish), Solanum tuberosum (potato), and Daucus carota (carrot) were most effective for promoting disappearance of pyrene within 40 days. Experiments with A. graveolens showed that plant culture in soil contaminated with pyrene or benzo[a]pyrene was as effective as addition of crushed root tissues. Comparison of the chemical compositions of the effective plants suggested that linoleic acid was the major substance that stimulated PAH degradation. This hypothesis was supported in experiments examining degradation of pyrene and benzo[a]pyrene in soil amended with linoleate, whereas linolenic and palmitic acids did not stimulate degradation within a 20 day period. Antibiotic inhibitor studies implicated gram positive bacteria as a predominant group responding to linoleic acid. These findings provide insight into the mechanisms by which plants enhance degradation of PAHs, and have practical application for remediation of PAH contaminated soils.
Absolute Method to Certify Quantum Yields of Photon Upconversion via Triplet–Triplet Annihilation (2019)

For the consistent development of the field of photon upconversion via triplet-triplet annihilation (TTA-UC), it is pivotal to know the true quantum yield of TTA-UC emission. Although TTA-UC quantum yields have been determined by common relative measurements using quantum yield standards, there is still a discrepancy between the reported values even for the benchmark sensitizer-emitter pair of platinum(II) octaethylporphyrin (PtOEP) and 9,10-diphenylanthracene (DPA). Here, to resolve this situation, we show a method to obtain the absolute quantum yield of TTA-UC photoluminescence. The difficulty in obtaining absolute TTA-UC quantum yield by the integrating sphere measurement is to accurately calibrate the contribution of reabsorbed upconverted emission by triplet sensitizers. The reabsorption correction is successfully carried out by comparing sensitizer phosphorescence with and without the integrating sphere. An absolute TTA-UC quantum yield of the PtOEP-DPA pair is obtained as 36%, which shows a good agreement with the relative TTA-UC quantum yield. An absolute TTA-UC quantum yield of another red-to-blue TTA-UC pair, platinum(II) <i>meso</i>-tetraphenyltetrabenzoporphyrin (PtTPBP) and 2,5,8,11-tetra-<i>tert</i>-butylperylene (TTBP), is obtained as 27%. These absolute TTA-UC quantum yields can be used as certified values to check the measurement setup and sample condition for determining relative TTA-UC quantum yields in each laboratory.
Barium ions inhibit the dynamic response of guinea‐pig corneal cold receptors to heating but not to cooling (2006)

An in vitro preparation of the guinea-pig cornea was used to study the effects of the K+ channel blockers 4-aminopyridine (4-AP), tetraethylammonium (TEA) and Ba2+ on nerve terminal impulses (NTIs) recorded extracellularly from cold sensory receptors. These receptors have an ongoing discharge of NTIs that is increased by cooling and decreased by heating. The K+ channel blocker 4-AP reduced the negative amplitude of the diphasic (positive-negative) NTIs, whereas TEA and Ba2+ prolonged the duration of the negative component. As the shape of the NTI is determined by the first derivative (dV/dt) of the membrane voltage change, these changes in the negative component are consistent with the blockade of K+ channels that contribute to action potential repolarization. Only TEA changed the basal activity of the receptors, increasing the likelihood of burst discharges. Ba2+ selectively reduced the response of the receptors to heating, whereas neither 4-AP nor TEA modified the response to heating or to cooling. The findings indicate that K+ channels blocked by 4-AP, TEA and Ba2+ contribute to action potential repolarization in corneal cold receptors, and that ionic mechanisms that underlie the reduction in NTI frequency in response to heating differ from those that increase activity in response to cooling.
Validation of a Brief Screen for Cognitive Impairment (BSCI) Administered by Telephone for Use in the Medicare Population (2005)

The aim of this research was to examine the validity of a brief screen for cognitive impairment (BSCI) consisting of three questions administered by telephone (delayed recall, frequency of help with planning trips for errands, and frequency of help remembering to take medications). The study design was an age and gender matched case-control study. Seventy managed care members, 35 with dementia (cases) and 35 without dementia (controls), were assessed using BSCI embedded within a longer health assessment questionnaire commonly used in Medicare-managed care. A number of measures were used to examine validity of BSCI, including comparisons of the differences between cases and controls in BSCI scores, comparisons of the correlations between patient scores on BSCI and the Mini Mental Status Exam (MMSE, a common screening test for dementia) and the Alzheimer's Disease Assessment Scale (ADAS, a common dementia assessment test), and comparisons of the areas under the receiver operating characteristic (ROC) curves for the three instruments. BSCI scores for cases and controls were significantly different, as were their scores for the MMSE and ADAS. Scores on BSCI were significantly correlated with scores for the MMSE and ADAS using both the Kendall's tau-b and Spearman rank-order correlation; correlations ranged from 0.654 between BSCI and ADAS to −0.83 for the correlation between BSCI and the MMSE (p < 0.001 for both). The areas under the ROC curves ranged from 0.94 to 0.96 for the three tests, meaning that they were equally accurate in discriminating between demented and nondemented patients. BSCI, a brief telephone screen for cognitive impairment due to dementia, discriminates between demented patients and normal controls as well as two standard tests of dementia, and may be considered a valid screen for dementia. Compared to existing screening tests, it has the additional advantages of extreme brevity, and ease of administration and scoring by lay interviewers via telephone. The use of brief screening instruments for dementia, such as the one validated here, will be increasingly important for the effective management of dementia and other chronic diseases where dementia is a coexisting condition. (Disease Management 2005;8:223–234)
Computational techniques which simplify the correlation between steady-state and transient response of filters and other networks (1954)

September 2, 1953--Cover. Reprinted from the Proceedings of the National Electronic Conference, vol. 9, February, 1954--Cover.
Fast SARS-CoV-2 virus detection using disposable cartridge strips and a semiconductor-based biosensor platform (2021)

Detection of the SARS-CoV-2 spike protein and inactivated virus was achieved using disposable and biofunctionalized functional strips, which can be connected externally to a reusable printed circuit board for signal amplification with an embedded metal-oxide-semiconductor field-effect transistor (MOSFET). A series of chemical reactions was performed to immobilize both a monoclonal antibody and a polyclonal antibody onto the Au-plated electrode used as the sensing surface. An important step in the biofunctionalization, namely, the formation of Au-plated clusters on the sensor strips, was verified by scanning electron microscopy, as well as electrical measurements, to confirm successful binding of thiol groups on this Au surface. The functionalized sensor was externally connected to the gate electrode of the MOSFET, and synchronous pulses were applied to both the sensing strip and the drain contact of the MOSFET. The resulting changes in the dynamics of drain waveforms were converted into analog voltages and digital readouts, which correlate with the concentration of proteins and virus present in the tested solution. A broad range of protein concentrations from 1 fg/ml to 10 <i>μ</i>g/ml and virus concentrations from 100 to 2500 PFU/ml were detectable for the sensor functionalized with both antibodies. The results show the potential of this approach for the development of a portable, low-cost, and disposable cartridge sensor system for point-of-care detection of viral diseases.
Intrathoracic Meningocele Associated with Neurofibromatosis: Case Report (1990)

Abstract The authors present a case of intrathoracic meningocele associated with neurofibromatosis. Computed tomography with metrizamide myelography proved valuable in locating the lesion, thus facilitating surgical intervention. With the preoperative diagnosis established and the severity of the meningocele known, the surgeons safely employed a subpleural approach at thoracotomy.
Planning human-aware motions using a sampling-based costmap planner (2011)

This paper addresses the motion planning problem while considering Human-Robot Interaction (HRI) constraints. The proposed planner generates collision-free paths that are acceptable and legible to the human. The method extends our previous work on human-aware path planning to cluttered environments. A randomized cost-based exploration method provides an initial path that is relevant with respect to HRI and workspace constraints. The quality of the path is further improved with a local path-optimization method. Simulation results on mobile manipulators in the presence of humans demonstrate the overall efficacy of the approach.
S100β Increases Levels of β‐Amyloid Precursor Protein and Its Encoding mRNA in Rat Neuronal Cultures (1998)

S100beta has been implicated in the formation of dystrophic neurites, overexpressing beta-amyloid precursor protein (betaAPP), in the beta-amyloid plaques of Alzheimer's disease. We assessed the effects of S100beta on cell viability of, neurite outgrowth from, and betaAPP expression by neurons in primary cultures from fetal rat cortex. S100beta (1-10 ng/ml) enhanced neuronal viability (as assessed by increased mitrochondrial activity and decreased lactic acid dehydrogenase release) and promoted neurite outgrowth. Higher levels of S100beta (100 ng/ml, but not 1 microg/ml) produced qualitatively similar, but less marked, effects. S100beta also induced increased neuronal expression of the microtubule-associated protein MAP2, an effect that is consistent with trophic effects of S100beta on neurite outgrowth. S100beta (10 and 100 ng/ml) induced graded increases in neuronal expression of betaAPP and of betaAPP mRNA. These results support our previous suggestion that excessive expression of S100beta by activated, plaque-associated astrocytes in Alzheimer's disease contributes to the appearance of dystrophic neurites overexpressing betaAPP in diffuse amyloid deposits, and thus to the conversion of these deposits into the diagnostic neuritic beta-amyloid plaques.
Fetal Origins of Malarial Disease: Cord Blood Cytokines as Risk Markers for Pediatric Severe Malarial Anemia (2014)

These data suggest that proinflammatory cytokine levels at birth are inversely associated with SMA risk and support the hypothesis that pediatric malarial disease has fetal origins.
Two State Markov Modelling And Detection Of Single Electron Spin Signals (2004)

Publication in the conference proceedings of EUSIPCO, Viena, Austria, 2004
Quantum oscillations and the Fermi surface of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2</mml:mn><mml:mi>H</mml:mi></mml:math>-Ta<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">S</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> (1978)

Quantum oscillations in the magnetoresistance and susceptibility of $2H$-Ta${\mathrm{S}}_{2}$ have been used to determine Fermi-surface cross sections. Eleven frequencies in the range from 0.04 to 6.44 MG have been observed corresponding to sections arising from the charge-density-wave transition at 75 K. Comparison to the frequencies observed in $4Hb$-Ta${\mathrm{S}}_{2}$ shows that the Fermi-surface cross sections are similar in both the $2H$ and $4Hb$ phases indicating relatively little charge transfer between octahedral and trigonal prismatic layers in $4Hb$-Ta${\mathrm{S}}_{2}$. The angular dependence observed for a number of sections in $2H$-Ta${\mathrm{S}}_{2}$ shows a $sec\ensuremath{\theta}$ dependence characteristic of cylinders while others show a more three-dimensional behavior in contrast to $4Hb$-Ta${\mathrm{S}}_{2}$ where all of the lowest frequencies show a $sec\ensuremath{\theta}$ dependence. Comparison to results on $2H$-Ta${\mathrm{Se}}_{2}$ and to band-structure calculations and band-folding models will also be made.
Synthesis of new betulinic acid–peptide conjugates and in vivo and in silico studies of the influence of peptide moieties on the triterpenoid core activity (2014)

Betulinic acid–peptide conjugates exhibit high anti-inflammatory activity.
Thermally-induced one-step construction of the tetracyclic steroidal skeleton from acyclic enyne-allenes (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermally-induced one-step construction of the tetracyclic steroidal skeleton from acyclic enyne-allenesYemane W. Andemichael, Ying Huang, and Kung K. WangCite this: J. Org. Chem. 1993, 58, 7, 1651–1652Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://pubs.acs.org/doi/10.1021/jo00059a005https://doi.org/10.1021/jo00059a005research-articleACS PublicationsRequest reuse permissionsArticle Views691Altmetric-Citations42LEARN 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 Get e-Alerts
First Hyperpolarizabilities of 1,3,5‐Tricyanobenzene Derivatives: Origin of Larger <i>β</i> Values for the Octupoles than for the Dipoles (2005)

A series of donor-acceptor substituted stilbene and diphenylacetylene derivatives and their octupolar analogues have been synthesized and the linear and nonlinear optical properties (beta) studied by both experiments and theoretical calculation. The lambda(max) of the dipoles increases with the conjugation length and is always larger when the C=C bond is used, instead of the C[triple bond]C bond, as the conjugation bridge. Although the lambda(max) values of the octupoles show no clear trend, they are much larger than those of the dipoles. The beta(0) values of the dipoles increase with conjugation length and as the conjugation bridge is changed from the C[triple bond]C to C=C bond. This increase is accompanied by an increase in either lambda(max) or the oscillator strength. Similarly, the beta(0) values of the octupoles increase with the conjugation length and with a change in the donor in the order: NEt2 < N(i-amyl)Ph < NPh2. Moreover, beta(yyy)/beta(zzz) ratios are in the range of 1.6-3.9 and decrease with the conjugation length. Beta values calculated by the finite-field and sum-over-states methods are in good agreement with the experimental data. Also, there is a parallel relationship between the calculated beta values and bond length alternation (BLA). From these results, the origin of the larger beta values for octupoles than for dipoles is assessed.