gebhart/patrepeval huggingface dataset:
Dissipation driven time reversal for waves (2018)

Dissipation is usually associated with irreversibility. Here we present a counter-intuitive concept to perform wave time reversal using a dissipation impulse. A sudden and strong modification of the damping, localized in time, in the propagating medium generates a counter-propagating time- reversed version of the initial wave. In the limit of a high dissipation shock, it amounts to a ‘freezing’ of the wave, where the initial wave field is retained while its time derivative is set to zero at the time of the impulse. The initial wave then splits into two waves with identical profiles, but with opposite time evolution. In contrast with other time reversal methods, the present technique produces an exact time reversal of the initial wave field, compatible with broad-band time reversal. Experiments performed with interacting magnets placed on a tunable air cushion give a proof of concept. Simulations show the ability to perform time reversal in 2D complex media.
The power play: Security-energy trade-offs in the IoT regime (2016)

We are in the regime of Internet-of-Things (IoT), - a regime characterized by billions of smart, connected computing devices coordinating to provide large-scale, highly personalized applications. Two overriding themes in this regime are energy consumption and security enforcement, which are both critical to the sustainability and proliferation of the IoT ecosystem. However, energy and security requirements are often at odds. This paper discusses several challenges in developing trustworthy IoT devices that comprehend the energy-security trade-offs. We also outline some emergent approaches to address this conflict.
Light‐Directing Omnidirectional Circularly Polarized Reflection from Liquid‐Crystal Droplets (2014)

Abstract Constructing and tuning self‐organized three‐dimensional (3D) superstructures with tailored functionality is crucial in the nanofabrication of smart molecular devices. Herein we fabricate a self‐organized, phototunable 3D photonic superstructure from monodisperse droplets of one‐dimensional cholesteric liquid crystal (CLC) containing a photosensitive chiral molecular switch with high helical twisting power. The droplets are obtained by a glass capillary microfluidic technique by dispersing into PVA solution that facilitates planar anchoring of the liquid‐crystal molecules at the droplet surface, as confirmed by the observation of normal incidence selective circular polarized reflection in all directions from the core of individual droplet. Photoirradiation of the droplets furnishes dynamic reflection colors without thermal relaxation, whose wavelength can be tuned reversibly by variation of the irradiation time. The results provided clear evidence on the phototunable reflection in all directions.
ISWC 2017: Riding the Waves of Wearables (2018)

The annual International Symposium on Wearable Computers (ISWC) is the flagship conference on all topics related to wearable computing and the ideal venue to present and learn about cutting-edge research in the field. The authors share their observations from the most recent gathering, held in September 2017 in Maui, Hawaii.
Silver Nanoparticles as Selective Ionization Probes for Analysis of Olefins by Mass Spectrometry (2008)

Laser desorption/ionization (LDI) using silver nanoparticles (AgNPs) is shown to selectively ionize olefinic compounds, e.g., cholesterol, 1-palmitoyl-2-oleoyl- sn-glycero-3-phosphocholine (POPC), and carotenoids. Selective AgNP LDI can be carried out from complex mixtures without the addition of an organic matrix, sample cleanup, or prefractionation. Results presented in this report are the first to demonstrate the selective ionization of specific compounds from a complex mixture using metal nanoparticles.
Design and manufacturing of an optimized retro reflective marker for photogrammetric pose estimation in ITER (2022)

Retro reflective markers can remarkably aid photogrammetry tasks in challenging visual environments. They have been demonstrated to be key enablers of pose estimation for remote handling in ITER. However, the strict requirements of the ITER environment have previously markedly constrained the design of such elements and limited their performance. In this work, we identify several retro reflector designs based on the cat's eye principle that are applicable to the ITER usecase and propose a methodology for optimizing their performance. We circumvent some of the environmental constraints by changing the curvature radius and distance to the reflective surface. We model, manufacture and test a marker that fulfils all the application requirements while achieving a gain of around 100\% in performance over the previous solution in the targeted working range.
Monoclonal Antibodies (1985)

The lymphoid malignancies have long been recognized as a heterogeneous group of disorders with respect to clinical presentation, course, and response to therapy (Frei and Sallan, 1978; Simone et al., 1975). The development of immunologic techniques defining lymphocyte subsets has provided insight into the cellular origin of these malignancies. Lymphocytes are commonly divided into two major groups. Bone marrow derived (B) lymphocytes are recognized by the presence of surface immunoglobulin (sIg), other lineage specific markers, and by their ability to be stimulated to produce immunoglobulin (Maino et al., 1977; Preud'homme and Seligmann, 1972). Thymus derived (T) lymphocytes are characterized by their ability to spontaneously bind sheep erythrocytes and express a number of lineage specific antigens at various stages of T-cell maturation (Reinherz et al., 1980b; Reinherz and Schlossman, 1980a; Reinherz and Schlossman, 1980b; Haynes, 1981). The distinction between malignancies derived from T or B lymphocytes has important clinical and diagnostic implications, in that patients with T-cell malignancies tend to have a more aggressive clinical course and poorer response to therapy compared to patients with B-cell malignancies (Frei and Sallan, 1978; Heideman et al., 1978). The development of heteroantisera directed against normal peripheral blood T cells further divided T cells into two functionally distinct subsets (Evans et al., 1978).
Normal myocardial perfwsion assessed with multishot echo‐planar imaging (1997)

A new magnetic resonance imaging strategy is presented for accessing myocardial perfusion. Most previous work has relied on using T1-weighted fast gradient-echo imaging to monitor dynamically the signal changes during the passage of a contrast media bolus. However, the gradient-echo approach is limited by an inability to image the entire heart with adequate temporal resolution. This paper focuses on a electrocardiogram-gated multishot echo-planar imaging sequence, using the simple strategy of using the intrinsic T1 weighting produced by a repetition time equal to the heart period. To quantitate the sequence's performance with respect to normal myocardial perfusion, seven volunteers were imaged, each with three different doses of the contrast medium gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA). The first-pass dynamics of the contrast were quantified in 13 regions per heart for each examination. In all volunteers, the complete heart could be covered, with five to seven slices, every two heartbeats. Enhancement was homogeneous throughout the left ventricular myocardium, with an enhancement of approximately 50% for the optimum contrast dose of 0.05 mmol/kg Gd-DTPA.
A Novel Fluorescent Monomer for the Selective Detection of Phenols and Anilines (1999)

ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTA Novel Fluorescent Monomer for the Selective Detection of Phenols and AnilinesMary A. Reppy, Martin E. Cooper, Juston L. Smithers, and Douglas L. GinView Author Information Department of Chemistry, University of California, Berkeley, California 94720-1460 Cite this: J. Org. Chem. 1999, 64, 11, 4191–4195Publication Date (Web):April 30, 1999Publication History Received19 October 1998Published online30 April 1999Published inissue 1 May 1999https://pubs.acs.org/doi/10.1021/jo982105ehttps://doi.org/10.1021/jo982105ebrief-reportACS PublicationsCopyright © 1999 American Chemical SocietyRequest reuse permissionsArticle Views689Altmetric-Citations23LEARN 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 SUBJECTS:Alcohols,Aromatic compounds,Fluorescence,Hydrocarbons,Quenching Get e-Alerts
Correlation between material properties of ferroelectric thin films and design parameters for microwave device applications: Modeling examples and experimental verification (1999)

Abstract The application of thin ferroelectric films for frequency and phase agile components is the topic of interest of many research groups worldwide. Consequently, proof-of-concepts (POC) of different tunable microwave components using either (HTS, metal)/ferroelectric thin film/dielectric heterostructures or (thick, thin) film “flip-chip” technology have been reported. Either as ferroelectric thin film characterization tools or from the point of view of circuit implementation approach, both configurations have their respective advantages and limitations. However, we believe that because of the progress made so far using the heterostructure (i.e., multilayer) approach, and due to its intrinsic features such as planar configuration and monolithic integration, a study on the correlation of circuit geometry aspects and ferroelectric material properties could accelerate the insertion of this technology into working systems. In this paper, we will discuss our study performed on circuits based on microstrip lines at frequencies above 10 GHz, where the multilayer configuration offers greater ease of insertion due to circuit's size reduction. Modeled results of relevant circuit parameters such as the characteristic impedance, effective dielectric constant, and attenuation as a function of ferroelectric film's dielectric constant, tanδ, and thickness, will be presented for SrTiO3 and BaxSr1−xTiO3 ferroelectric films. A comparison between the modeled and experimental data for some of these parameters will be presented.
Single-Carrier Cyclic-Extension block DFE in time varying channels (2009)

The increasing data rates in wireless mobile systems involve transmitting in wideband channels giving rise to multi-path propagation. The classical way to attenuate intersymbol interference due to multipath channels is to use time domain equalizers, which are complex if the channel has many taps. OFDM signals allow an easy equalization of multipath channels, although the resulting high Peak to Average Power Ratio (PAPR) associated to this modulation produces a high power consumption, which may be unacceptable for mobile devices. However, it is possible to conceive a hybrid system where downlink uses OFDM and uplink uses Single-Carrier Cyclic-Extension (SC-CE) in a form that the implementation issues can be relaxed in the mobile. In this work we study a frequency domain Decision Feedback Equalizer (DFE) for the uplink of such a hybrid system. Simulations show that RLS algorithm has faster convergence rate than LMS. Furthermore, RSL algorithm is able to track time varying channel better than the LMS solution.
The ProPrems trial: investigating the effects of probiotics on late onset sepsis in very preterm infants (2011)

Australia and New Zealand Clinical Trials Register (ANZCTR): ACTRN012607000144415The product "ABC Dophilus Probiotic Powder for Infants®", Solgar, USA has its 3 probiotics strains registered with the Deutsche Sammlung von Mikroorganismen und Zellkulturen (DSMZ--German Collection of Microorganisms and Cell Cultures) as BB-12 15954, B-02 96579, Th-4 15957.
Quantitative vessel tortuosity radiomics on baseline non-contrast lung CT predict response to immunotherapy and are prognostic of overall survival (2019)

Recently immune-checkpoint inhibitors have demonstrated promising clinical efficacy in patients with advanced non-small cell lung cancer (NSCLC). However, the response rates to immune checkpoint blockade drugs remain modest (45% in the front line setting and 20% in the second line setting). Consequently, there is an unmet need to develop accurate, validated biomarkers to predict which NSCLC patients will benefit from immunotherapy. While there has been recent interest in evaluating the role of texture and shape patterns of the nodule on CT scans to predict response to checkpoint inhibitors for NSCLC, our group has shown that nodule vessel morphology might also play a role in determining tumor aggressiveness and behavior. In this work we present a new approach using quantitative vessel tortuosity (QVT) radiomics, to predict response to checkpoint inhibitors and overall survival for patients with NSCLC treated with Nivolumab (a PD1 inhibitor) on a retrospective data set of 111 patients (D1) including 56 responders and 45 non-responders. Patients who did not receive Nivolumab after 2 cycles due to a lack of response or progression as per Response Evaluation Criteria in Solid Tumors (RECIST) were classified as non-responders, patients who had radiological response or stable disease as per RECIST were classified as responders. On D<sub>1</sub>, in conjunction with a linear discriminant analysis (LDA) classifier the QVT features were able to predict response to immunotherapy with an AUC of 0.73_0.04. Kaplan Meier analysis showed significant difference of overall survival between patients with low risk and high risk defined by the radiomics classifier (p-value = 0.004, HR= 2.29, 95% CI= 1.35 - 3.87).
Longitude force estimation for bandwidth conservative communication and vehicular monitoring (2010)

In this paper, we address a driver behavior reconstruction problem which is important to enhance traffic safety. More specifically, the task in this study is to estimate the longitude tire force which can be transferred to the corresponding throttle/brake positions under the assumption that the steering angles are known. Although the sensors mounted on the throttle/brake pedals can directly measure the pedal positions and multimodal sensors can also be used to measure vehicle states to estimate the longitude tire force, the sensors are costly and cannot be readily mounted in the vehicle. In order to avoid such shortcomings, we consider using a low cost 1Hz GPS receiver as the vehicle data acquisition equipment. In our work, a longitude force estimation scenario is developed for the nonlinear extended 2-wheel vehicle dynamic model only according to the GPS information. Firstly, two states, i.e. the sideslip angle and the yaw rate are estimated since they are not available from GPS measurements. Secondly, an optimization scheme is proposed to estimate the longitude tire force. Finally, the estimation results can validate our methods by comparing to the reference longitude tire force command.
Detailed analysis of radiation-induced delays on I/O blocks of an SRAM-based FPGA (2016)

In this paper, we analyze through analytical and experimental means the impact of different SEU induced mechanisms modifying delays in I/O blocks of SRAM-based FPGAs. We propose simple RC delay models for these mechanisms. Our results, obtained through HSPICE simulations and experimental SEU emulation, show the relevance of these delay models. They also show that these mechanisms differ from the ones affecting the FPGA core and routing, and that additional measurements are required to estimate the related delays.
InP-based polarization rotator-splitter for mid-infrared photonic integration circuits (2019)

We design and experimentally demonstrate the propagation loss of waveguides and the operation of a single-step etched polarization rotator-splitter (PRS) in low index contrast InGaAs-InP material system at 6.15 μm. Propagation losses 4.19 dB/cm for TM mode and 3.25 dB/cm for TE mode are measured. The designed PRS can achieve near 100% conversion efficiency. This study enables the possibility of monolithic integration of quantum cascade devices with TM-polarized characteristics and TE-guiding two-dimensional slotted photonic crystal waveguide gas sensors for on-chip monolithic absorption spectroscopy.
One‐Pot Selective Catalytic Synthesis of Pyrrolidone Derivatives from Ethyl Levulinate and Nitro Compounds (2016)

N-substituted 5-methyl-2-pyrrolidones were prepared in a one-pot process starting from ethyl levulinate and nitro compounds in the presence of a nanosized Pt-based catalyst. Pt supported on TiO<sub>2</sub> nanotubes (Pt/TiO<sub>2</sub> -NT) catalyzed the synthesis of N-substituted 5-methyl-2-pyrrolidones through a cascade process involving the reduction of nitro compounds, formation of the intermediary imine, hydrogenation, and subsequent cyclization. A bifunctional metal-acid system was a suitable catalyst for the process. Pt supported on TiO<sub>2</sub> showed lower catalytic activity than Pt/TiO<sub>2</sub> -NT owing to the strong adsorption of nitro compounds during the first reaction step that poisoned the acidic sites and strongly decreased the rate of amination and cyclization. However, Pt/TiO<sub>2</sub> -NT with milder acid sites was less affected by the adsorption of nitro compounds and the full cascade process could proceed. The results indicate that the prepared Pt/TiO<sub>2</sub> -NT is a chemoselective and reusable catalyst that can be applied to the synthesis of a variety of N-substituted 5-methyl-2-pyrrolidones starting from nitro compounds with excellent yields in absence of an additional organic solvent under mild reaction conditions.
Development of a high spatial resolution detector for at-wavelength metrology of x-ray optics (2014)

Recent advancements in the field of x-ray astronomy have relied significantly on innovations in grazing-incidence x-ray optics technology, especially for the hard x-ray range for energies above 10 keV. The behavior of these x-ray telescopes for current and planned astrophysical and solar imaging missions needs to be well understood, and fully characterizing the optics includes measurements of the point spread function and effective area for flight optics as a function of energy and off-axis position as well as understanding the scattering and reflectivity properties of substrate coatings. This requires unique detectors with large areas, very high spatial resolution, high sensitivity, photon counting capability and energy discrimination. We report on the development of a detector that is well suited to meet these requirements. The key piece of the instrument is a high spatial-resolution, electron-multiplying charge-coupled device. The detector is back-thinned and optically bonded via a fiberoptic taper to a purpose-fabricated high resolution, high brightness CsI:Tl scintillator with a microcolumnar structure. A prototype version of this camera was used to calibrate the x-ray focusing optics for the Nuclear Spectroscopic Telescope Array (NuSTAR) mission successfully operating in space since its launch in June 2012. Here we present our recent work on the design of the EMCCD detector and scintillators, fabrication, assembly and testing of the full detector system as well as our software development efforts for single photon detection and energy discrimination. Also included are first results from our recent measurement campaign at the x-ray stray light calibration facility of NASA's Marshall Space Flight Center.
Differential effect of Platelet Endothelial Cell Adhesion Molecule-1 (PECAM-1) on leukocyte infiltration during contact hypersensitivity responses (2017)

PECAM-1 is used by many leukocyte populations for migration, but there are clearly differential effects on the usage by each subset. Further, the overall kinetics of each population varied between primary and secondary application, with large relative increases in γδ T lymphocytes during the secondary response.
Efficient hydrolytic hydrogenation of cellulose in the presence of Ru-loaded zeolites and trace amounts of mineral acid (2011)

The hydrolytic hydrogenation of cellulose in the presence of Ru-loaded zeolites and trace amounts of mineral acid shows excellent yields (>90%) for hexitols.
Superconducting Test Cavity With Dielectric Concentrator for High Q, High Surface Field (2009)

A superconducting test cavity and cryostat are being developed to support the testing of round wafer samples of new superconducting materials. The cavity is designed to test these samples in surface fields up to and beyond the BCS limit of Nb. The design is optimized to produce maximum surface field on the sample compared with that elsewhere in the cavity. It operates in the TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">011</sub> mode. A dielectric hemisphere of low-loss sapphire is located just above the wafer surface and serves to concentrate the surface field. The sapphire is cooled by a column of superfluid He, with sufficient heat transport to maintain high Q throughout the rf pulse. It should be possible to test a sample to twice the BCS limit of Nb while measuring the rf surface resistance of the sample.
225 GHz Mode-Hop-Free Tuning with a Narrow Linewidth Integrated InP/Si Laser (2022)

We demonstrated mode-hop-free tuning over 225 GHz (1.8 nm) in an integrated external-cavity diode laser operating around 1550 nm and with an intrinsic linewidth of 4.7 kHz.
Crystal Structure of Arginase from Plasmodium falciparum and Implications for l-Arginine Depletion in Malarial Infection, (2010)

The 2.15 A resolution crystal structure of arginase from Plasmodium falciparum, the parasite that causes cerebral malaria, is reported in complex with the boronic acid inhibitor 2(S)-amino-6-boronohexanoic acid (ABH) (K(d) = 11 microM). This is the first crystal structure of a parasitic arginase. Various protein constructs were explored to identify an optimally active enzyme form for inhibition and structural studies and to probe the structure and function of two polypeptide insertions unique to malarial arginase: a 74-residue low-complexity region contained in loop L2 and an 11-residue segment contained in loop L8. Structural studies indicate that the low-complexity region is largely disordered and is oriented away from the trimer interface; its deletion does not significantly compromise enzyme activity. The loop L8 insertion is located at the trimer interface and makes several intra- and intermolecular interactions important for enzyme function. In addition, we also demonstrate that arg- Plasmodium berghei sporozoites show significantly decreased liver infectivity in vivo. Therefore, inhibition of malarial arginase may serve as a possible candidate for antimalarial therapy against liver-stage infection, and ABH may serve as a lead for the development of inhibitors.