gebhart/patrepeval huggingface dataset:
Nondestructive Inspection of Graphite-Epoxy Composites for Heat Damage Using Laser-Induced Fluorescence (1995)

Laser-induced fluorescence has been applied to the nondestructive inspection of graphite-fiber-reinforced polymer-matrix composites. Upon curing, the epoxy resin in these materials forms a highly cross-linked network of aromatic sub-units. This result yields a material with significant absorptivity from the ultraviolet through the near-infrared and a fluorescence bandwidth covering 200 to 300 nm. When subjected to temperatures beyond the recommended upper service temperature, these materials experience thermally induced degradation and a reduction in mechanical strength. Furthermore, these heat-damaged materials exhibit significant changes in fluorescence intensity and in the wavelength of maximum fluorescence intensity. These spectroscopic changes can be correlated with the extent of heat damage. An imaging approach has been developed to monitor these fluorescence signatures, allowing rapid nondestructive inspection of large surface areas. This capability provides qualitative and quantitative information about the location and severity of damage.
Cancellation of Non-Harmonic Waves Using a Cycloidal Turbine (2011)

We computationally investigate the ability of a cycloidal turbine to cancel two-dimensional non-harmonic waves in deep water. A cycloidal turbine employs the same geometry as the well established Cycloidal or Voith-Schneider Propeller. It consists of a shaft and one or more hydrofoils that are attached eccentrically to the main shaft and can be independently adjusted in pitch angle as the cycloidal turbine rotates. We simulate the cycloidal turbine interaction with incoming waves by viewing the turbine as a wave generator superimposed with the incoming flow. The generated waves ideally are 180° out of phase and cancel the incoming wave downstream of the turbine. The upstream wave is very small as generation of single-sided waves is a characteristic of the cycloidal turbine as has been shown in prior work. The superposition of the incoming wave and generated wave is investigated in the far-field and we model the hydrofoil as a point vortex. This model has previously been used to successfully terminate regular deep water waves as well as intermediate depth water waves. We explore the ability of this model to cancel non-harmonic waves. Near complete cancellation is possible for a non-harmonic wave with components designed to match those generated by the cycloidal turbine for specified parameters. Cancellation of a specific wave component of a multi-component system is also shown. Also, step changes in the device operating parameters of circulation strength, rotation rate, and submergence depth are explored to give insight to the cycloidal turbine response characteristics and adaptability to changes in incoming waves. Based on these studies a linear, time-invarient (LTI) model is developed which captures the steady state wave frequency response. Such a model can be used for control development in future efforts to efficiently cancel more complex incoming waves.
Network performance of distributed coevolutionary agents (2003)

Innovations in software, networks, and database systems are enabling widely distributed organizations to integrate activities, share information, collaborate on decisions, and execute transactions. However, successful enterprise-wide collaboration is increasingly dependent on the availability of generalized decision-support tools that can efficiently access and utilize distributed information. This paper presents a basic theory and network-based performance evaluation of a class of coevolutionary algorithms that supports efficient planning in a distributed environment. Performance of these coevolutionary algorithms is evaluated in a distributed information architecture (coevolutionary virtual design environment) that supports integrated design-supplier-manufacturing planning. In this architecture, distributed evolutionary agents and mobile agents are principal entities that support a network-efficient exploration of planning alternatives in which successive populations systematically select superior planning alternatives.
Polymerization of 1-bromo-4-lithiobenzene in THF: A route to soluble polyphenylene (1992)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymerization of 1-bromo-4-lithiobenzene in THF: A route to soluble polyphenyleneJames M. Tour, Eric B. Stephens, and Joanna F. DavisCite this: Macromolecules 1992, 25, 1, 499–500Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Published inissue 1 January 1992https://pubs.acs.org/doi/10.1021/ma00027a081https://doi.org/10.1021/ma00027a081research-articleACS PublicationsRequest reuse permissionsArticle Views109Altmetric-Citations6LEARN 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
Live demonstration: A multi-modality CMOS sensor array for cell-based assay and drug screening (2015)

We propose to perform a live demonstration on our recently developed multi-modality CMOS sensor array whose sensor pixel each integrates several biosensors with different sensing modalities. Unlike many single-modality sensors, this multi-modality CMOS sensor array can real-time capture multi-physics responses of living cells and tissues with a high spatiotemporal resolution. This live demonstration will showcase the operation of our CMOS sensor and its multi-modality detection of human ovarian cancer cells HeyA8-F8 under different chemical administrations.
Iterative Condition Monitoring and Fault Diagnosis Scheme of Electric Motor for Harsh Industrial Application (2014)

This paper presents a robust diagnosis technique by iteratively analyzing the pattern of multiple fault signatures in a motor current signal. It is mathematically and experimentally proved that the proposed diagnosis algorithm provides highly accurate monitoring performance while minimizing both false detection and miss detection rate under high noise and nonlinear machine operating condition. These results are verified on a digital-signal-processor-based motor drive system where motor control and fault diagnosis are performed in real time.
Resolving quadrature fringes in real time (2004)

In many interferometers, two fringe signals can be generated in quadrature. The relative phase of the two fringe signals depends on whether the optical path length is increasing or decreasing. A system is developed in which two quadrature fringe signals are digitized and analyzed in real time with a digital signal processor to yield a linear, high-resolution, wide-dynamic-range displacement transducer. The resolution in a simple Michelson interferometer with inexpensive components is 5 x 10(-13) m Hz(-1/2) at 2 Hz.
The complex of immunoglobulin A and uromodulin as a diagnostic marker for immunoglobulin A nephropathy (2012)

Detection of the urinary IgA-uromodulin complex by ELISA is a useful non-invasive method to diagnose IgAN.
Automated assembly of parallel fiber optic cables (2002)

The INCA (IN-line Cable Assembly) process was developed for assembling fiber optic cables automatically. During the INCA process, precisely coated fibers are laminated between the cable backing materials. Connectors are installed robotically onto the fibers as required. After the cable is assembled, the connectors are finished and body parts are added. Automation of the assembly process is efficient and results in high quality fiber optic cable assemblies.
A SAR processing algorithm for TOPS imaging mode based on extended chirp scaling (2007)

This paper presents an efficient phase preserving processor for TOPS (Terrain Observation by Progressive Scans) imaging mode. TOPS has been proposed as a new wide swath imaging mode, which solves the problems of scalloping and azimuth-varying ambiguities introduced by the conventional ScanSAR mode by means of steering the antenna along the azimuth direction. An algorithm based on ECS (Extended Chirp Scaling) is proposed, which uses sub-apertures and a new azimuth scaling step. The proposed solution is also efficient in the sense that it allows selecting the final azimuth image spacing by means of azimuth scaling, hence easing the forthcoming mosaicking of the different sub swaths. Simulations with point targets are used to validate the processor.
A novel method of using hollow-core photonic crystal fiber as a Raman biosensor (2008)

A new method for using a non-selectively filled hollow-core photonic crystal fiber (HC-PCF) as a sensitive Raman spectroscopy platform suitable for biosensing applications is presented. A 1550 HC-PCF was completely filled with ethanol (core and cladding holes). Using a 785nm excitation laser, the Raman spectrum of ethanol in the fiber core was obtained and compared with the equivalent Raman spectrum of an ethanolfilled cuvette. Using a relatively short 9.5cm length of HC-PCF, a Raman signal enhancement factor of 40 over a bulk solution of ethanol was observed under the same excitation conditions. The small sample volume utilized and longer interaction length provides the potential for compact, sensitive, and low-power Raman sensing of biological materials
New GNSS Signals Demodulation Performance in Urban Environments (2014)

International audience
Recent progress in multi-core fiber design and analysis (2012)

Recent progress in multi-core fiber design and analysis is reviewed, focusing on a coupled-mode theory and a coupled power theory. Statistical models including bend-induced random perturbations which play a crucial role in crosstalk are presented.
Novel Aspects of Dietary Nitrate and Human Health (2013)

The circulation of nitrogen in nature is a prerequisite for life on earth. In the nitrogen cycle atmospheric nitrogen is fixated by bacteria into forms that can be utilized by plants and mammals. Nitrate and nitrite are obligate intermediates in this cycle, and for more than half a century these anions have interested nutritional scientists, mostly in relation to cancer, because of their ability to form nitrosamines. However, after the discovery of mammalian endogenous nitric oxide (NO) generation and later that its oxidation products nitrate and nitrite can be recycled back to bioactive NO, a novel field of research has emerged that explores a potentially beneficial role of these anions in physiology, nutrition, and therapeutics. In our diet, vegetables are the major source of nitrate that can fuel a nitrate-nitrite-NO pathway. Herein we discuss the nutritional aspects of this pathway and what is presently known about the implications for human health.
A novel rheometer design for yield stress fluids (2013)

An inexpensive, rapid method for measuring the rheological properties of yield stress fluids is described and tested. The method uses an auger that does not rotate during measurements, and avoids material and instrument‐related difficulties, for example, wall slip and the presence of large particles, associated with yield stress fluids. The method can be used for many types of yield stress fluids, including concentrated lignocellulosic biomass. Sample preparation prior to measurement is minimal, reducing, or eliminating disruption of the sample. We show that measurements using this technique compare well with measurements obtained with a vane rheometer. A variation of the described method is proposed that would make it easier to measure time‐dependent rheological properties. © 2014 American Institute of Chemical Engineers AIChE J , 60: 1523–1528, 2014
Semipermeable Membrane From Ionomeric Self-Assembling Block Copolymer (2001)

Morphological studies have been performed on novel polystyrene-polyisobutylene- polystyrene (PS-PlB-PS) triblock copolymer films made by different processes. The PS-PIB-PS films are composed of approximately 30% polystyrene end blocks. Small-angle x-ray scattering (SAXS) and transmission electron microscopy (TEM) confirm that a self-assembled, segregated cylindrical morphology forms in the copolymer. Dynamic mechanical analysis (DMA) is used as a tool to investigate the structure-property relationships in these polymers. Fourier-transform infrared (FTIR) spectroscopy and solvent-sorption studies have validated the membrane transport properties. Modified PS-PJB-PS copolymers have also been characterized. Modifications of the copolymers were carried out by converting approximately 20% of the polystyrene end blocks to styrene-sulfonic acid. The presence of sulfonic acid groups disrupts the morphology and significantly enhances water transport properties. Morphological features of the copolymers are discussed as they relate to mechanical and transport properties.
An open architecture for next-generation telecommunication services (2004)

An open (in the sense of extensible and programmable) architecture for IP telecommunications must be based on a comprehensive strategy for managing feature interaction. We describe our experience with BoxOS, an IP telecommunication platform that implements the DFC technology for feature composition. We present solutions to problems, common to all efforts in IP telecommunications, of feature distribution, interoperability, and media management. We also explain how BoxOS addresses many deficiencies in SIP, including how BoxOS can be used as a SIP application server.
Development of highly reliable SERS‐active photonic crystal fiber probe and its application in the detection of ovarian cancer biomarker in cyst fluid (2019)

Conventionally Surface-enhanced Raman spectroscopy (SERS) is realized by adsorbing analytes onto nano-roughened planar substrate coated with noble metals (silver or gold) or their colloidal nanoparticles (NPs). Nanoscale irregularities in such substrates/NPs could lead to SERS sensors with poor reproducibility and repeatability. Herein, we demonstrate a suspended core photonic crystal fiber (PCF) based SERS sensor with extremely high reproducibility and repeatability in measurement with a relative SD of only 1.5% and 4.6%, respectively, which makes it more reliable than any existing SERS sensor platforms. In addition, our platform could improve the detection sensitivity owing to the increased interaction area between the guided light and the analyte, which is incorporated into the holes that runs along the length of the PCF. Numerical calculation established the significance of the interplay between light coupling efficiency and evanescent field distribution, which could eventually determine the sensitivity and reliability of the developed SERS active-PCF sensor. As a proof of concept, using this sensor, we demonstrated the detection of haptoglobin, a biomarker for ovarian cancer, contained within the ovarian cyst fluid, which facilitated in differentiating the stages of cancer. We envision that with necessary refinements, this platform could potentially be translated as a next-generation highly sensitive SERS-active opto-fluidic biopsy needle for the detection of biomarkers in body fluids.
Cognitive-Radio Systems for Spectrum, Location, and Environmental Awareness (2010)

In order to perform reliable communications, a system needs to have sufficient information about its operational environment, such as spectral resources and propagation characteristics. Cognitive-radio technology has capabilities for acquiring accurate spectrum, location, and environmental information, due to its unique features such as spectrum, location, and environmental awareness. The goal of this paper is to give a comprehensive review of the implementation of these concepts. In addition, the dynamic nature of cognitive-radio systems - including dynamic spectrum utilization, transmission, the propagation channel, and reception - is discussed, along with performance limits, challenges, mitigation techniques, and open issues. The capabilities of cognitive-radio systems for accurate characterization of operational environments are emphasized. These are crucial for efficient communications, localization, and radar systems.
Antagonistic Properties of Human Prolactin Analogs That Show Paradoxical Agonistic Activity in the Nb2 Bioassay (1996)

Based on the assumption that the prolactin receptor (PRLR) is activated by PRL-induced sequential dimerization, potential human PRL (hPRL) antagonists were designed that sterically interfere with binding site 2. We previously reported the unexpected agonistic properties of these hPRL analogs in the rat Nb2 bioassay (Goffin, V., Struman, I., Mainfroid, V., Kinet, S., and Martial, J. A. (1994) J. Biol. Chem. 269, 32598-32606). In order to investigate whether such paradoxical agonistic behavior might result from characteristic features of the Nb2 assay (e.g. species specificity), we transfected in the same cell system the cDNA encoding the PRLR from rat or human species along with reporter genes containing PRL-responsive DNA sequences. We characterized the agonistic, self-antagonistic and/or antagonistic effects of wild type rat PRL, wild type hPRL, and three hPRL analogs, mutated either at binding site 1 or at binding site 2. Our results clearly show that the agonistic/antagonistic properties of PRLs are species-specific. We thus propose different models of receptor activation, depending on the relative affinities of each hormonal binding site, which is directed by species specificity. Finally, this is the first report of hPRL binding site 2 analogs showing antagonistic properties on human and, to a lesser extent, rat receptors.
Investigation of a Three-Dimensional Micro-Scale Sensing System Based on a Tapered Self-Assembly Four-Cores Fiber Bragg Grating Probe (2018)

Three-dimensional micro-scale sensors are in high demand in the fields of metrology, precision manufacturing and industry inspection. To extend the minimum measurable dimension and enhance the accuracy, a tapered four-cores fiber Bragg grating (FBG) probe is proposed. The sensing model is built to investigate the micro-scale sensing characteristics of this method and the design of the tapered stylus is found to influence the accuracy. Therefore, a π/2 phase-shift point is introduced into the FBGs comprised in the probe to suppress spectrum distortion and improve accuracy. Then, the manufacturing method based on capillary self-assembly is proposed to form the probe and the critical length to form a square array for four cylindrical fibers is verified to be effective for the tapered fibers. Experimental results indicate that the design of the tapered stylus can extend the minimum measurable dimension by twofold and has nearly no influence on its sensitivity. The three-dimensional measurement repeatability is better than 31.1 nm and the stability is better than 200 nm within once measuring process. Furthermore, the measurement precision of the three-dimensional micro-scale measurement results is less than 150 nm. It would be widely used in measuring micro-scale features for industry inspection or metrology.
Multi-Wavelength Quantum Key Distribution Emulation with Physical Unclonable Function (2022)

This work details the theory and implementation of a multi-wavelength quantum key distribution (QKD) emulation system with a physical unclonable function (PUF). Multi-wavelength QKD can eliminate the need to share a subsection of the final key for eavesdropper detection and allow for ternary and quaternary data transmission. The inclusion of the PUF adds an additional layer of security. We provide preliminary error analysis of our emulation system. To support this work, we introduce a bitwise transform operator that enables binary output of the PUF to satisfy the ternary and quaternary input requirements of the QKD system.
Magnetic bistable micro-actuator with integrated permanent magnets (2006)

A new magnetic micro-actuator with integrated permanent magnets has been developed. The design of this device, with a levitating mobile magnet, is a real innovation and is patented. The structure was modeled using analytical and numerical calculations. Furthermore, the fabrication feasibility, using collective micro-technology processes, has recently been demonstrated.
New approaches to virtual environment surgery. (1999)

This research focused on two main problems: 1) low cost, high fidelity stereoscopic imaging of complex tissues and organs; and 2) virtual cutting of tissue. A further objective was to develop these images and virtual tissue cutting methods for use in a telemedicine project that would connect remote sites using the Next Generation Internet. For goal one we used a CT scan of a human heart, a desktop PC with an OpenGL graphics accelerator card, and LCD stereoscopic glasses. Use of multiresolution meshes ranging from approximately 1,000,000 to 20,000 polygons speeded interactive rendering rates enormously while retaining general topography of the dataset. For goal two, we used a CT scan of an infant skull with premature closure of the right coronal suture, a Silicon Graphics Onyx workstation, a Fakespace Immersive WorkBench and CrystalEyes LCD glasses. The high fidelity mesh of the skull was reduced from one million to 50,000 polygons. The cut path was automatically calculated as the shortest distance along the mesh between a small number of hand selected vertices. The region outlined by the cut path was then separated from the skull and translated/rotated to assume a new position. The results indicate that widespread high fidelity imaging in virtual environment is possible using ordinary PC capabilities if appropriate mesh reduction methods are employed. The software cutting tool is applicable to heart and other organs for surgery planning, for training surgeons in a virtual environment, and for telemedicine purposes.
A Novel Brain Cysteine Protease Forms an SDS Stable Complex with the β‐Amyloid Precursor Proteina (1996)

Alzheimer's disease (AD) brain accumulates beta-protein (A beta) a peptide proteolytically derived from the beta-amyloid precursor protein (APP). The abnormal production and aggregation of A beta have been implicated in the pathogenesis of the disease. The mechanism of production of A beta in vivo is not yet clear; but endoproteases capable of degrading APP are likely to be involved in the process. We have isolated a protease from AD brain by following its activity in digesting a synthetic peptide of 10 amino acids derived from the APP sequence flanking the N-terminus of A beta. The protease was purified by a fractionation scheme including ammonium sulfate precipitation and column chromatography using hydrophobic interaction, anion exchange, affinity, hydroxyapatite and size exclusion gels. The purity of the final product was assessed on a silver stained SDS gel by the presence of a single band. Microsequencing was performed following trypsin digestion of the sample. Internal peptide sequences were found to have sequence homology to cysteine proteases in the database. The enzyme requires DTT for activity and can be inhibited by specific inhibitors of cysteine but not serine proteases. The purified enzyme has a pI of 5.0 and a native tetrameric structure with subunits of 48 kD each. The enzyme is capable of digesting APP and generating a short peptide recognizable by antibodies specific to the C-terminus of APP. Interestingly, the purified protease also forms heat- and SDS-stable complexes with APP.