gebhart/patrepeval huggingface dataset:
Mechanism and Selectivity in Catalytic Olefin Polymerization (1993)

ADVERTISEMENT RETURN TO BOOKPREVChapterNEXTMechanism and Selectivity in Catalytic Olefin PolymerizationA. R. SiedleA. R. Siedle3M Corporate Research Laboratories, 201-2E-02 3M Center, St. Paul, MN 55144More by A. R. Siedle, W. M. LamannaW. M. Lamanna3M Corporate Research Laboratories, 201-2E-02 3M Center, St. Paul, MN 55144More by W. M. Lamanna, J. M. OlofsonJ. M. Olofson3M Corporate Research Laboratories, 201-2E-02 3M Center, St. Paul, MN 55144More by J. M. Olofson, B. A. NeradB. A. Nerad3M Corporate Research Laboratories, 201-2E-02 3M Center, St. Paul, MN 55144More by B. A. Nerad, and R. A. NewmarkR. A. Newmark3M Corporate Research Laboratories, 201-2E-02 3M Center, St. Paul, MN 55144More by R. A. NewmarkDOI: 10.1021/bk-1993-0517.ch011Publication Date (Print):May 5, 1993Publication History Published online23 July 2009Published inprint 5 May 1993Request reuse permissions Copyright © 1993 American Chemical Society. Selectivity in CatalysisChapter 11pp 156-167ACS Symposium SeriesVol. 517ISBN13: 9780841225190eISBN: 9780841213739Chapter Views280Citations19LEARN ABOUT THESE METRICSChapter 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. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options SUBJECTS:Catalysts,Ethylene polymerization,Hydrocarbons,Olefin polymerization,Selectivity Get e-Alerts
Selective oxidation of complex, water-insoluble biomass to formic acid using additives as reaction accelerators (2012)

The oxidation of complex, water-insoluble biomass to formic acid is reported using a Keggin-type polyoxometalate (H5PV2Mo10O40) as the homogeneous catalyst, oxygen as the oxidant, water as the solvent and p-toluenesulfonic acid as the best additive. The reaction proceeds at 90 °C and 30 bar O2 and transforms feedstock like wood, waste paper, or even cyanobacteria to formic acid and CO2 as the sole products. The reaction obtains up to 53% yield in formic acid for xylan as the feedstock within 24 h. Besides the role of the additive as a reaction promoter, the formic acid isolation and the recycling of catalyst and additive are demonstrated.
Advanced Limiter Test-II Program to field a toroidal belt pump limiter in the TEXTOR tokamak. Progress report, FY 1985 (1985)

During the first quarter, the UCLA members of the ALT-II team worked primarily on the development of the experimental program plan and the diagnostics selection, and on the data acquisition system. These programs are discussed in this report.
Brassinosteroids with Ester Function with Five Carbon Atoms at the 20 Position (1992)

Pregnane analogues of brassinolide and castasterone have been prepared which have an ester function with five carbon atoms at the 20 position. When tested by the bean second internode bioassay, the most efficient substance is VIII .
Sex and Gender Differences in the Outcomes of Vaccination over the Life Course (2017)

Both sex (i.e., biological differences) and gender (i.e., social or cultural influences) impact vaccine acceptance, responses, and outcomes. Clinical data illustrate that among children, young adults, and aged individuals, males and females differ in vaccine-induced immune responses, adverse events, and protection. Although males are more likely to receive vaccines, following vaccination, females typically develop higher antibody responses and report more adverse effects of vaccination than do males. Human, nonhuman animal, and in vitro studies reveal numerous immunological, genetic, hormonal, and environmental factors that differ between males and females and contribute to sex- and gender-specific vaccine responses and outcomes. Herein, we address the impact of sex and gender variables that should be considered in preclinical and clinical studies of vaccines.
Turbo Coding for 4G Systems: Design Issues and Solutions (2002)

After the initial interest caused by the appearance of turbo codes in 1993, special attention on the implementation has led to their adoption in some of the most important 3G standards. However, future broadband systems (with data rates up to 155 Mb/s) still require a better speed/latency/power performance than those found in current implementations. This paper discusses several design aspects of a broadband, low-power turbo codec owing features that enable its application in the incoming decade systems. The presented ideas were applied to an 80 Mb/s, 2 nJ/bit turbo codec core with latency smaller than 10 s. This flexible architecture allows re-scaling towards faster low power implementations (beyond 1 Gb/s).
Adaptive Estimation for Approximate k-Nearest-Neighbor Computations (2019)

Algorithms often carry out equally many computations for "easy" and "hard" problem instances. In particular, algorithms for finding nearest neighbors typically have the same running time regardless of the particular problem instance. In this paper, we consider the approximate k-nearest-neighbor problem, which is the problem of finding a subset of O(k) points in a given set of points that contains the set of k nearest neighbors of a given query point. We propose an algorithm based on adaptively estimating the distances, and show that it is essentially optimal out of algorithms that are only allowed to adaptively estimate distances. We then demonstrate both theoretically and experimentally that the algorithm can achieve significant speedups relative to the naive method.
Decomposed description of Ramsey spectra under atomic interactions (2018)

We introduce a description of Ramsey spectra under atomic interactions as a sum of decomposed components with differing dependence on interaction parameters. This description enables intuitive understanding of the loss of contrast and asymmetry of Ramsey spectra. We derive a quantitative relationship between the asymmetry and atomic interaction parameters, which enables their characterization without changing atom density. The model is confirmed through experiments with a Yb optical lattice clock.
rf amplification in a three-terminal magnetic tunnel junction with a magnetic vortex structure (2009)

We fabricated a three-terminal MgO-based magnetic tunnel junction including a free layer for use as a vortex-type spin structure. The resonant motion of the magnetic vortex core, excited by the application of rf current to the free layer, was successfully detected through the tunneling magnetoresistance effect using a homodyne detection technique. By analyzing the detected dc signal, we were able to qualitatively estimate the efficiency of the spin-transfer induced excitation. From the parameters obtained in the experiment, we found that substantial voltage gain can be realized with this device.
Ultra-narrow band tunable superconducting filter with constant bandwidth and same transmission zero points (2012)

We have proposed an ultra-narrow band tunable superconducting filter with constant bandwidth and same transmission zero points for X-band RF applications. This tunable filter tuned center frequency by dielectric rods with actuator. At the same time, coupling coefficients and external Q of the filter change with individual gradient. This filter realized constant bandwidth and same transmission zero points by means of position at coupling microstrip line. The developed tunable superconducting filter has 4-pole elliptic function response for sharp skirt characteristic. Tuning range was between 9700 MHz and 9800 MHz for weather radar. Also, this filter had fractional bandwidth of 0.04%.
Exploring the explosive ablation regime of metals in nanosecond micromachining (2000)

We present results of single shot ablation experiments for a variety of metal samples (In, Al, Cu, Mo, W, Ti) using visible, nanosecond lasers at fluences up to approximately 10<SUP>4</SUP> J cm<SUP>-2</SUP>. At low fluences, usually less than 10<SUP>2</SUP> J cm<SUP>-2</SUP>, small amounts of material were removed and removal was approximately uniform across the ablation crater. As the fluence increased above approximately 10<SUP>2</SUP> J cm<SUP>-2</SUP>, substantially more material was removed and a conical pit developed in the center of the ablation crater. The appearance of these conical pits is consistent with material removed by phase explosion mechanisms. In this paper, this ablation phenomenon will be investigated by presenting the crater morphology as a function of fluence. Consequences for micromachining with visible, high repetition rate, nanosecond lasers will be discussed.
SMA Actuated Vertical Blade Louver System: Part 1 — Performance Requirements and Design (2013)

Airflow over/under/around a vehicle can affect many important aspects of vehicle performance including vehicle drag (and through this vehicle fuel economy), vehicle lift and downforce, and cooling/heat exchange for the vehicle powertrain and A/C systems. While active devices are present on all aircraft, the majority of known airflow control devices in current use in ground transportation are of fixed geometry, location, orientation, and stiffness. The project, conducted during the 2004–2006 timeframe, whose performance requirements, design, and bench-top prototype build phases, are described in this paper was successful in developing an SMA actuator based approach for opening and closing a vertically-oriented-blade louver system to be used for on-demand control of the airflow into the engine compartment, i.e. for on-demand control of both cooling airflow as well as aerodynamic drag. Beyond feasibility, the initial full scale bench top working models demonstrated an active materials based approach which would have decreased weight and a smaller packaging envelop than a comparable motor driven unit. This demonstration showed that actuation speed, force, and cyclic stability all could meet the application requirements. The specific design that was selected, a set of parallel vertically oriented blades each linked through a gear to a common rack that is translated by a linear SMA actuator, uses straight linear actuation to produce a reversible synchronous 90 degree rotation of the blades, i.e. a full opening and closing capability for the louver system. Key technical issues that remained to be demonstrated and resolved through design modifications if necessary in Part 2 — on-vehicle performance testing — of this study were related in most part to robustness in the harsh vehicle front-end environment, a prime example being mechanism stalling due to ice or mud buildup.
CoFAR Clutter Channel Estimation via Sparse Bayesian Learning (2023)

A cognitive fully adaptive radar (CoFAR) alters its behavior autonomously to accomplish desired tasks. The knowledge of the target environment is essential to the efficient operation of CoFAR. In this work, we consider the enhanced environment sensing aspect and study the problem of clutter channel impulse response (CIR) estimation in CoFAR. Using the high-fidelity modeling and simulation tool RFView, we show that the clutter CIR is sparse. Subsequently, we propose a sparse Bayesian learning (SBL) framework for estimating the underlying sparse clutter CIR, which does not require the a priori knowledge of the unknown clutter CIR's sparsity profile. Further, we derive the Bayesian Cramér-Rao bound (BCRB) for the proposed method and show the effectiveness of the proposed SBL-based clutter channel estimation method by comparing its performance with the derived BCRB.
C4 article: Implications of COVID-19 in transplantation (2020)

A novel coronavirus has had global impact on individual health and health care delivery. In this C4 article, contributors discuss various aspects of transplantation including donor and recipient screening, management of infected patients, and prevention of coronavirus disease (COVID). Donor screening with SARS-CoV-2 nucleic acid testing (NAT) close to the time of procurement is recommended. Many programs are also screening all potential recipients at the time of admission. The management of COVID has evolved with remdesivir emerging as a new potential option for transplant recipients. Dexamethasone has also shown promise and convalescent plasma is under study. Prevention strategies for transplant candidates and recipients are paramount. Pediatric-specific issues are also discussed. Strategies for the psychological well-being of patients and providers are also imperative, in addition to future research priorities for transplantation.
Reply to “A Brain Drain due to Increased Regulation of Influenza Virus Research Is Highly Speculative” (2014)

W e appreciate the perspective provided by Dr. Culp in de- scribing the acceptance by scientists of the highly regulated environment for classified physics research (1).We agree that as more microbiology research falls into the category of "dual-use research of concern" or DURC, it is important to consider the experience in fields such as physics, whose members had to learn how to deal and work with these challenges.Dr. Culp's perspective is welcomed and important for the ongoing debate.However, we argue that in the present, the influenza research community is largely university and research institute based and therefore that the comparison to the restrictive environment accepted by the physics community is not a relevant comparison.Much of the influenza research work is currently being done by graduate students and postdoctoral fellows who need to complete their projects to receive their doctoral degrees and obtain jobs.For these individuals, interruptions of research work by moratoriums and increased regulation cannot be a welcomed state of affairs.Although we do not have any data at this time to support our belief that increased regulations in influenza research will drive some young scientists to look for less-restrictive pastures, it is reasonable to suspect that changes that affect their work environment will have some effect on career choices.Established investigators may remain in the field despite increased regulation simply be-cause established scientists have generally very little mobility between fields (2).However, the situation for young bright minds with choice between selecting a highly regulated field and an unencumbered academic field is very different.Hence, we believe that the concerns expressed in our editorial remain valid (3).
An immunity modeling technique to predict the influence of continuous wave and amplitude modulated noise on nonlinear analog circuits (2013)

An innovative method to model, in the early design stage, the behavior of nonlinear analog circuits in the presence of noise is presented.The technique relies on Harmonic Balance analysis and the obtained model does not only efficiently predict the influence of a continuous wave disturbance, it may also be used to quickly estimate the device's behavior while being subjected to amplitude modulated noise.The method leverages surrogate models, as such reducing the simulation time and concealing the intellectual property of the circuit manufacturer.Moreover, the model can be easily integrated into a circuit simulator.An industrial case study of a voltage regulator for automotive applications is described in this contribution and it clearly confirms the capabilities of the method.
Flat focus: depth of field analysis for the FlatCam lensless imaging system (2017)

Lensless imaging systems, such as the recently proposed FlatCam, offer numerous advantages over lens-based systems such as a thin form-factor, low cost, and higher light throughput. However, little work has been done in analyzing these systems' depth of field characteristics. A depth-dependent calibration step is necessary to obtain the image from the FlatCam measurements, and this calibration determines the system's depth of field. In this paper, we characterize the FlatCam's depth of field properties and show that (a) for scene depths on the order of tens of centimeters, it is possible to perform depth-selective refocusing from a single captured image and (b) for sufficiently large scene depths, calibratin.g for one depth can provide a very large depth of field.
Methods for Fabricating Microarrays of Motile Bacteria (2005)

Motile bacterial cell microarrays were fabricated by attaching Escherichia coli K-12 cells onto predesigned 16-mercaptohexadecanoic acid patterned microarrays, which were covalently functionalized with E. coli antibodies or poly-L-lysine. By utilizing 11-mercaptoundecyl-penta(ethylene glycol) or 11-mercapto-1-undecanol as passivating molecules, nonspecific binding of E. coli was significantly reduced. Microcontact printing and dip-pen nanolithography were used to prepare microarrays for bacterial adhesion, which was studied by optical fluorescence and atomic force microscopy. These data indicate that single motile E. coli can be attached to predesigned line or dot features and binding can occur via the cell body or the flagella of bacteria. Adherent bacteria are viable (remain alive and motile after adhesion to patterned surface features) for more than four hours. Individual motile bacterial cells can be placed onto predesigned surface features that are at least 1.3 microm in diameter or larger. The importance of controlling the adhesion of single bacterial cell to a surface is discussed with regard to biomotor design.
Foldamer‐based Molecular Recognition (2007)

This chapter contains sections titled: Introduction Small Molecule Recognition Using Foldamers Receptors for Water Molecules Receptors for Ammonium Cations Receptors for Hydrophobic Small Molecules Receptors for Saccharides Receptors of Other Organic Molecules Protein Recognition Abiotic Synthetic Foldamers Peptidomimetic Foldamers Mimicry of Biomineralization: Recognition of Crystal Surfaces Using Foldamers Introduction to Biomineralization Biomimetic Synthesis of Calcite Using Foldamers Biomimetic Synthesis of CdS Using Foldamers Conclusion References
On Interconnection and Equivalence of Continuous and Discrete Systems - A Behavioral Perspective (2005)

In this thesis a unified systems theoretic framework for modeling and analysis of dynamical systems is presented. The approach is based on Willems? behavioral approach to systems theory. The main tenet of the behavioral approach is that systems are identified by their behavior, which is the collection of all possible trajectories of the system.
A TI-92 solution to the ISSAC '97 challenge problem 1 (1998)

article Free Access Share on A TI-92 solution to the ISSAC '97 challenge problem 1 Author: David R. Stoutemyer View Profile Authors Info & Claims ACM SIGSAM BulletinVolume 32Issue 1March 1998pp 38–55https://doi.org/10.1145/294833.570094Published:01 March 1998Publication History 0citation143DownloadsMetricsTotal Citations0Total Downloads143Last 12 Months10Last 6 weeks1 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Publisher SiteeReaderPDF
Integrin-matrix interactions affect the form of the structures developing from human mammary epithelial cells in collagen or fibrin gels (1998)

The HB2 cell line, developed from luminal epithelial cells cultured from milk, forms ball-like structures in collagen gels which show a uniform branching response to hepatocyte growth factor. The alpha2beta1 integrin is the major integrin expressed by luminal epithelial cells, and the role of this integrin in mammary morphogenesis has been analysed using HB2 cells cultured in collagen gels and antibodies which affect integrin function. Selectivity of response was followed by comparing effects on morphogenesis in fibrin, where the alphavbeta1 integrin interacts with the matrix. In the presence of hepatocyte growth factor, using alpha2 and beta1 antibodies in collagen and alphav and beta1 antibodies in fibrin, complete blocking of the cell-matrix interaction inhibits cell survival. With partial blocking of the integrin-ligand interaction, the cells proliferate but form dissociated colonies. Activating antibodies to the beta1 integrin subunit which enhance the matrix interaction dramatically inhibit the branching and motility responses to hepatocyte growth factor. A series of non-blocking alpha2 reactive antibodies also inhibit these responses specifically in or on collagen. Studies with ras-transfected HB2 cells emphasise the importance of the alpha2beta1 collagen interaction in the development of form since HB2ras cells, which express reduced levels of the alpha2beta1 integrin, form dissociated colonies in collagen but not in fibrin. Treatment of HB2ras cells with a beta1 activating antibody, however, induces the formation of compact colonies. Even though the ras-transformants form colonies in agar, complete blocking of the alpha2beta1/collagen interaction does not allow survival in collagen. The results indicate that in mammary morphogenesis, the strength of the interaction of integrins with the extracellular matrix modulates the response to motogenic factors and contributes to the definition of form.
RiskWheel: Interactive visual analytics for surveillance event detection (2014)

Detecting human behaviors in vast amounts of video is a challenging task in a variety of real-world applications. Thus an interactive tool designed to support this task with human in the loop is of significance in various domains including public safety and security. In this paper, we design and develop an interactive visual analytics system, RiskWheel, that enables effective analysis of detection results and utilization of user feedback to improve surveillance event detection. In particular, we propose 1) an interactive approach to visualize data with temporal relations and 2) a novel risk ranking method to differentiate detection results and present more informative ones to the user for better interaction. In our experiments, we demonstrate RiskWheel through a case study on TRECVID Surveillance Event Detection (SED) task [1]. The experimental results quantitatively show that RiskWheel outperforms multiple baselines, demonstrating the power of the risk ranking technique.
Dynamic Model for the Simulation of Surge in a Centrifugal Compression System with Vaned Diffuser (2019)

As the flow rate decreases from stable point to surge point, the flow phenomenon of low-frequency system dependent pulsation occurs in a centrifugal compressor compression system. In order to predict the system instability of surge with higher accuracy, the mathematical model of pipeline coupled with the model of lumped parameters is used to investigate the effect of pipeline on the system instability of a centrifugal compressor. The predicted vibration frequency of mild surge matches well with the measured data and the relative error is just 2.3%. And also, the spatial distribution of gas fluctuation in pipeline is analysed in detail to elucidate the developing characteristics of system instability affected by the piping system. Moreover, with the analysis of system instability under varied parameters of pipeline, each parameter has a different influence on the stability and vibration frequency. This study confirms that this model is a useful tool to give a detailed analysis about the effect of pipeline on system instability.