gebhart/patrepeval huggingface dataset:
The Effect of Plasma Spraying Power on La0.58Sr0.4Co0.2Fe0.8O3–δ–La0.8Sr0.2Ga0.8Mg0.2O3–δ Composite Cathode Interlayer Microstructure and Cell Performance (2013)

Abstract The metal‐supported intermediate temperature solid oxide fuel cells with a porous nickel substrate, a nano‐structured LDC (Ce 0.55 La 0.45 O 2–δ )–Ni composite anode, an LDC diffusion barrier layer, an LSGM (La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3–δ ) electrolyte, an LSCF (La 0.58 Sr 0.4 Co 0.2 Fe 0.8 O 3–δ )–LSGM composite cathode interlayer and an LSCF cathode current collector are fabricated by atmospheric plasma spraying. Four different plasma spraying powers of 26, 28, 30, and 34 kW are used to fabricate the LSCF–LSGM composite cathode interlayers. Each cell with a prepared LSCF–LSGM composite cathode interlayer has been post‐heat treated at 960 °C for 2 h in air with an applied pressure of 450 g cm –2 . The current‐voltage‐power and AC impedance measurements indicate that the LSCF–LSGM composite cathode interlayer formed at 28 kW plasma spraying power has the best power performance and the smallest polarization resistance at temperatures from 600 to 800 °C. The microstructure of the LSCF–LSGM composite cathode interlayer shows to be less dense and composed of smaller dense regions as the plasma spraying power decreases to 28 kW. The durability test of the cell with an optimized LSCF–LSGM composite cathode interlayer gives a degradation rate of 1.1% kh –1 at the 0.3 A cm –2 constant current density and 750 °C test temperature.
Vapor Pressures of Alcohol−Gasoline Blends (2010)

Reid vapor pressures (RVPs) were determined for alcohol−gasoline blends containing 5−85% by volume of methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, i-butanol (2-methyl-1-propanol), and t-butanol (2-methyl-2-propanol). The results are compared to literature data. Most alcohols form near-azeotropic mixtures with hydrocarbons in gasoline that affect the vapor pressure of the blend in a non-ideal manner. In addition, vapor pressures of dual-alcohol blends with gasoline containing a range of ethanol and 1-butanol volume percentages were determined. We demonstrate a simple method to prepare dual-alcohol−gasoline blends with RVPs indistinguishable from that of the base gasoline. It may be advantageous to use alcohols in addition to ethanol in the form of dual- or multi-alcohol blends as these become available in larger scale in the future.
Photonic millimeter wave system for high capacity wireless communications (2015)

Pushing the wireless communications capacity above 100 Gbps will require new spectral regions and new technologies and techniques. Millimeter wave photonics technology appears poised to meet the new bandwidth and fidelity challenges and offers novel architectures, techniques, and system capabilities. This paper presents recent work developing and demonstrating millimeter wave photonic carrier generation, upconversion, downconversion and photonic millimeter wave arrays as well as how they fit into a new class of wireless communications architecture.
OCCAM: Onset-Constrained Colloidal Asphaltene Model (2000)

Abstract Asphaltene deposits affect the primary production of oil from the wellbore to the surface facilities and may also cause problems during storage and pipeline transportation. A model to predict the occurrence of asphaltene separation is therefore required in order to avoid or minimize upsets due to asphaltene precipitation. With the aim of identifying the physical nature of the asphaltene separation, both onset-of-precipitation and quantity-of-asphaltene experimental data were produced. While in general previous researchers have tried to apply or adapt well-known models to describe the experimental results, the peculiar behavior observed for asphaltenes has been used here to gain insight into the mechanism of precipitation. From this work a model (Onset-Constrained Colloidal Asphaltene Model) has been developed, allowing predictions of asphaltene flocculation from standard PVT data and a limited set of experimental data on stabilized oil. Because it is physically well founded, the model is applicable to any situation in which asphaltene separation is possible; it allows prediction of both the precipitation onset and the quantity of asphaltene that separates as a function of oil composition, temperature and pressure. Model applications show good agreement between predicted and experimental data on stock tank oils; moreover upstream applications are shown which further confirm model results. Besides, the model explains numerous experimental observations and physical descriptions of many other researchers, so that it is further reinforced by the prior literature. A new insight into the phenomenon of asphaltene precipitation was gained and an original model was built, so that most of previous experimental data can be included in this framework.
Special Report: Noninvasive Multi-Parameter Functional Optical Imaging of the Eye (2005)

Advancement in the treatment of blindness depends on the development of new technologies that enable early detection, follow-up, and treatment of disease. The authors describe direct, noninvasive imaging of four parameters: blood flow, blood oximetry, metabolic state, and hidden vasculature, particularly capillaries. These are functional parameters of the retina known to be degraded by retinal disease. The new Retinal Function Imager (Optical Imaging, Ltd., Rehovot, Israel) can image all four parameters as intrinsic reflectance intensity differences over the retina's surface. During the past 2 decades, imaging of small optical signals has been a powerful tool for high-resolution functional mapping in the neocortex. In this article, this technology is applied to the retina and demonstrates a general tool for noninvasively probing retinal function in many modalities. Imaging functional changes before anatomic consequences arise holds promise as a powerful tool for early diagnosis and treatment of retinal disease.
Role of individual gamma-carboxyglutamic acid residues of activated human protein C in defining its in vitro anticoagulant activity (1992)

To evaluate the contributions of individual gamma-carboxyglutamic acid (gla) residues to the overall Ca(2+)-dependent anticoagulant activity of activated human protein C (APC), we used recombinant (r) DNA technology to generate protein C (PC) variants in which each of the gla precursor glutamic acid (E) residues (positions 6, 7, 14, 16, 19, 20, 25, 26, and 29) was separately altered to aspartic acid (D). In one case, a gla26V mutation ([gla26V]r-PC) was constructed because a patient with this particular substitution in coagulation factor IX had been previously identified. Two additional r-PC mutants were generated, viz, an r-PC variant containing a substitution at arginine (R) 15 ([R15]r-PC), because this particular R residue is conserved in all gla-containing blood coagulation proteins, as well as a variant r-PC with substitution of an E at position 32 ([F31L, Q32E]r-PC), because gla residues are found in other proteins at this sequence location. This latter protein did undergo gamma-carboxylation at the newly inserted E32 position. For each of the 11 recombinant variants, a subpopulation of PC molecules that were gamma-carboxylated at all nonmutated gla-precursor E residues has been purified by anion exchange chromatography and, where necessary, affinity chromatography on an antihuman PC column. The r-PC muteins were converted to their respective r-APC forms and assayed for their amidolytic activities and Ca(2+)-dependent anticoagulant properties. While no significant differences were found between wild-type (wt) r-APC and r-APC mutants in the amidolytic assays, lack of a single gla residue at any of the following locations, viz, 7, 16, 20, or 26, led to virtual complete disappearance of the Ca(2+)-dependent anticoagulant activity of the relevant r-APC mutant, as compared with its wt counterpart. On the other hand, single eliminations of any of the gla residues located at positions 6, 14, or 19 of r-APC resulted in variant recombinant molecules with substantial anticoagulant activity (80% to 92%), relative to wtr-APC. Mutation of gla residues at positions 25 and 29 resulted in r-APC variants with significant but low (24% and 9% of wtr-APC, respectively) levels of anticoagulant activity. The variant, [R15L]r-APC, possessed only 19% of the anticoagulant activity of wrt-APC, while inclusion of gla at position 32 in the variant, [F31L, Q32gla]r-APC, resulted in a recombinant enzyme with an anticoagulant activity equivalent to that of wtr-APC.
A Visual Analytics Framework for Distributed Data Analysis Systems (2021)

This paper proposes a visual analytics framework that addresses the complex user interactions required through a command-line interface to run analyses in distributed data analysis systems. The visual analytics framework facilitates the user to manage access to the distributed servers, incorporate data from the source, run data-driven analysis, monitor the progress, and explore the result using interactive visualizations. We provide a user interface embedded with generalized functionalities and access protocols and integrate it with a distributed analysis system. To demonstrate our proof of concept, we present two use cases from the earth science and Sustainable Human Building Ecosystem research domain.
Cooperative Reuse of fragmented Spectrum in High-Voltage Power-Line Carrier Systems - A new Approach of PowerLink IP (2019)

Based on the traditional approach of frequency planning in high-voltage power-line carrier (HV PLC) systems, this paper introduces a new method of cooperative reuse of a fragmented spectrum in HV PLC systems allowing a high degree of fairness in frequency reuse by neighboring network cells. The main objective of the method is to increase the data throughput by utilizing frequency resources that cannot be used by the neighboring network cells in traditional systems. An additional intercellular communication via medium access request channels was proposed for that reason.
Pharmacogenetic considerations of anticoagulant medication. (2018)

Predicting the clinical consequences of anticoagulant therapy by identifying gene variants could help in the risk assessment of thrombosis or bleeding before and after surgery and may result in choosing more beneficial therapy. This work provides an overview of pharmacogenetic data of commonly used anticoagulant medication. The review focuses on polymorphisms influencing the efficacy and safety of the parenteral and oral anticoagulants. There is evidence that heparin resistance and heparin-induced thrombocytopenia could be genetically determined but it does not mean that the risk of bleeding or thromboembolism is related to mutations in general. CYP2C9 and VKORC1 polymorphisms are essential determinants in the genotype-guided dosing of warfarin and may distinguish patients who would benefit from switching to direct oral anticoagulants (DOACs). Further multi-ethnic studies associating genes of enzymes metabolizing DOACs with primary clinical endpoints are necessary. Pharmacogenetics-based dosing of anticoagulant medication should point towards the subpopulation of patients.
The Prevalence and Clinical Course of HIV-Associated Pulmonary Cryptococcosis in Uganda (2010)

Pulmonary cryptococcosis is common in HIV-infected tuberculosis suspects in Uganda. Early initiation of antiretroviral therapy in those with isolated pulmonary infection may improve outcomes, even without antifungal therapy. This finding suggests that some HIV-infected patients with C. neoformans isolated from respiratory samples may have colonization or localized infection.
RE-EVALUATION OF A TECHNIQUE OF PITUITARY INCUBATION IN VITRO AS AN ASSAY FOR CORTICOTROPIN RELEASING FACTOR1 (1959)

The in vitro pituitary incubation system used previously for the characterization of CRF activity has been reinvestigated. Under the conditions as used to assay CRF, there is no detectable destruction of ACTH activity. The effect of CRF cannot therefore be explained on the basis of inhibition of ACTH inactivation. CRF does not act either by potentiating ACTH at the adrenal level or by an inherent adrenocorticotrophic activity. When considering the minimal active dose of purified substances, this test system appears to be highly specific for CRF. There is complete agreement as to characterization of CRF between data obtained in vitro and with recent in vivo assay systems.
A Fully Parameterizable Implementation of Autonomous Take-off and Landing for a Fixed Wing UAV (2015)

The take-off and landing of an unmanned aerial vehicle is often the most critical and accident prone portion of its mission. This potential hazard coupled with the time and resources necessary to train a remote UAV pilot makes it desirable to have autonomous take-off and landing capabilities for UAVs. However, a robust, reliable, and accurate autonomous take-off and landing capability for fixed-wing aircraft is not an available feature in many low-cost UAV flight control systems. This paper describes the design of an autonomous take-off and landing algorithm implemented on an existing low-cost flight control system for a small fixed wing UAV. This paper also describes the autonomous takeoff and landing algorithm development and gives validation results from hardware in the loop simulation.
Nucleosides from carbohydrate adducts of diaminomaleonitrile. A novel synthesis of 5-amino-1-(.beta.-D-ribofuranosyl)imidazole-4-carboxamide and 5-amino-1-(.beta.-D-ribopyranosyl)imidazole-4-carboxamide (1985)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNucleosides from carbohydrate adducts of diaminomaleonitrile. A novel synthesis of 5-amino-1-(.beta.-D-ribofuranosyl)imidazole-4-carboxamide and 5-amino-1-(.beta.-D-ribopyranosyl)imidazole-4-carboxamideJames P. Ferris, Balekadru Devadas, Chun Hsien Huang, and Wu Yen RenCite this: J. Org. Chem. 1985, 50, 6, 747–754Publication Date (Print):March 1, 1985Publication History Published online1 May 2002Published inissue 1 March 1985https://pubs.acs.org/doi/10.1021/jo00206a004https://doi.org/10.1021/jo00206a004research-articleACS PublicationsRequest reuse permissionsArticle Views635Altmetric-Citations20LEARN 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
Electronic Characterization of the Single-wall CarbonNanotubes: A XANES Study (2004)

The single-wall carbon nanotubes (SWCNs) were discovered in '93 and are made of pure carbon atoms just like a single sheet of graphite wrapped around a cylindrical axis. The same material with slight variations in the geometrical arrangement yields different electronic properties, which could ran...
Uncovering foveal crowding? (2014)

Visual crowding, as context modulation, reduce the ability to recognize objects in clutter, sets a fundamental limit on visual perception and object recognition. It's considered that crowding does not exist in the fovea and extensive efforts explored crowding in the periphery revealed various models that consider several aspects of spatial processing. Studies showed that spatial and temporal crowding are correlated, suggesting a tradeoff between spatial and temporal processing of crowding. We hypothesized that limiting stimulus availability should decrease object recognition in clutter. Here we show, for the first time, that robust contour interactions exist in the fovea for much larger target-flanker spacing than reported previously: participants overcome crowded conditions for long presentations times but exhibit contour interaction effects for short presentation times. Thus, by enabling enough processing time in the fovea, contour interactions can be overcome, enabling object recognition. Our results suggest that contemporary models of context modulation should include both time and spatial processing.
PhET: Interactive Simulations for Teaching and Learning Physics (2005)

The Physics Education Technology (PhET) project creates useful simulations for teaching and learning physics and makes them freely available from the PhET website (http://phet.colorado.edu). The simulations (sims) are animated, interactive, and game-like environments in which students learn through exploration. In these sims, we emphasize the connections between real-life phenomena and the underlying science, and seek to make the visual and conceptual models of expert physicists accessible to students. We use a research-based approach in our design—incorporating findings from prior research and our own testing to create sims that support student engagement with and understanding of physics concepts.
A random forest classifier for the prediction of energy expenditure and type of physical activity from wrist and hip accelerometers (2014)

Wrist accelerometers are being used in population level surveillance of physical activity (PA) but more research is needed to evaluate their validity for correctly classifying types of PA behavior and predicting energy expenditure (EE). In this study we compare accelerometers worn on the wrist and hip, and the added value of heart rate (HR) data, for predicting PA type and EE using machine learning. Forty adults performed locomotion and household activities in a lab setting while wearing three ActiGraph GT3X+ accelerometers (left hip, right hip, non-dominant wrist) and a HR monitor (Polar RS400). Participants also wore a portable indirect calorimeter (COSMED K4b2), from which EE and metabolic equivalents (METs) were computed for each minute. We developed two predictive models: a random forest classifier to predict activity type and a random forest of regression trees to estimate METs. Predictions were evaluated using leave-one-user-out cross-validation. The hip accelerometer obtained an average accuracy of 92.3% in predicting four activity types (household, stairs, walking, running), while the wrist accelerometer obtained an average accuracy of 87.5%. Across all 8 activities combined (laundry, window washing, dusting, dishes, sweeping, stairs, walking, running), the hip and wrist accelerometers obtained average accuracies of 70.2% and 80.2% respectively. Predicting METs using the hip or wrist devices alone obtained root mean square errors (rMSE) of 1.09 and 1.00 METs per 6 min bout, respectively. Including HR data improved MET estimation, but did not significantly improve activity type classification. These results demonstrate the validity of random forest classification and regression forests for PA type and MET prediction using accelerometers. The wrist accelerometer proved more useful in predicting activities with significant arm movement, while the hip accelerometer was superior for predicting locomotion and estimating EE.
The Influence of Various Maintenance Immunosuppressive Drugs on Lymphocele Formation and Treatment After Kidney Transplantation (2004)

The combination of sirolimus/MMF/P, obesity with a body mass index of greater than 30 kg/m and acute rejection are independent risk factors for lymphocele formation and treatment after kidney transplantation. Patients should be counseled and consideration should be given to prophylactic measures in this higher risk renal transplant population.
A new packaging technique for an optical 90°-hybrid balanced receiver using planar lightwave circuits (2002)

A new packaging technique for an optical 90/spl deg/-hybrid balanced receiver using planar lightwave circuits (PLC) has been developed for optical frequency division multiplexing (OFDM). This receiver consists of a silica-based PLC for an optical coupler and two polarization beam splitters (PBS), two GRIN rod lenses to achieve perfect optical interconnection, and two photoreceivers each having a preamplifier and twin PIN-PDs. The photoreceivers use the microsolder bump technique to eliminate the parasitic elements of the interconnections between the preamplifier and the twin PIN-PDs, and the impedance-matched film carrier technique to achieve impedance-matched interconnection between the preamplifier and the ceramic package. This receiver achieved a broadband frequency response of 14 GHz, and, consequently, 10-Gbit/s homodyne detection. The experiments showed that a receiver fabricated with our new packaging technique has excellent performance.
A 3D differential coil design for localized magnetic stimulation (2002)

A novel 3D differential coil has been designed and fabricated for magnetic stimulation of the CNS. This coil can provide the localization quality comparable to a small-sized butterfly coil which generated the most localized induced fields in the literature. Furthermore, it can provide adequate inductance to match regular stimulators while the small-sized butterfly coil can not. The induced fields generated by this new coil were measured and in agreement with theoretical calculations.
Transport and Defect Mechanisms in Cuprous Delafossites. 1. Comparison of Hydrothermal and Standard Solid-State Synthesis in CuAlO2 (2004)

CuAlO2 exhibits a unique defect structure that is dependent on the synthesis route. High-temperature solid-state and low-temperature hydrothermal techniques are compared to illustrate how cation off-stoichiometry affects the electrical properties of CuAlO2. A defect complex of Al on a Cu-site stabilized by two bound oxygen interstitials (AlCu••2Oi‘ ‘)‘ ‘ is proposed which serves as an acceptor dopant to set the hole concentration. Trapping of holes (small polarons) by such complexes with decreasing temperature is proposed to account for the decreasing carrier content with temperature. Hydrothermal samples exhibit approximately an order of magnitude increase in hole concentration relative to the solid-state synthesized samples; this is reflected in the electrical conductivity and may explain the variations in electrical properties reported for CuAlO2.