gebhart/patrepeval huggingface dataset:
Gelcast Molding with Rapid Prototyped Fugitive Molds (2018)

A technique for the rapid manufacture ofceramic components has been developed\nusing rapid prototyping to generate molds for the required components. The process\nentails the fabrication offugitive tooling using rapid prototyping techniques from which\nceramic articles are formed using gelcasting. In the gelcasting process, the mold cavities\nare filled with a fluid suspension of ceramic powder which sets to a solid form through\nthe polymerization of gelling additives and application of heat. The mold is carefully\nremoved by dissolution or heat treatment leaving the intact gelcast part. The "green"\ngelcast part is subsequently dried and sintered to full density. Computer aided\nmanufacturing of the tooling using solid freeform fabrication techniques allows for\ncomplex shapes to be manufactured with minimal tooling cost. The technique is idealfor\nthe manufacture of ceramic parts in small batch conditions or for prototyping of\nfunctional parts in design cycles. Cost and time reduction of a magnitude can be\nachieved.
A dynamic TF-GSC beamformer for distributed arrays with dual-resolution speech-presence-probability estimators (2016)

The problem of speech enhancement using a distributed microphones array in a dynamic scenario where speaker, noise and microphone arrays are free to move is considered. The transfer function generalized sidelobe canceler (TF-GSC) spatial filter [1] which optimizes the minimum variance distortionless response (MVDR) criterion is used for enhancing the desired speech signal. A novel speech presence probability (SPP) estimator is proposed based on [2]. By using a dual-resolution SPP, the proposed estimator is able to detect noise dominant frequencies during speech, and thus improve noise tracking capability. We test the proposed algorithm in real dynamic scenarios, and demonstrate its consistent signal to noise ratio (SNR) improvement using a distributed microphone array consisting of 2 devices and 4 microphones.
The Renaissance of Halide Perovskites and Their Evolution as Emerging Semiconductors (2015)

The recent re-emergence of the halide perovskites, of the type AMX3, derives from a sea-changing breakthrough in the field of photovoltaics that has led to a whole new generation of solar devices with remarkable power conversion efficiency. The success in the field of photovoltaics has led to intense, combined research efforts to better understand these materials both from the fundamental chemistry and physics points of view and for the improvement of applied functional device engineering. This groundswell of activity has breathed new life into this long-known but largely "forgotten" class of perovskites. The impressive achievements of halide perovskites in photovoltaics, as well as other optoelectronic applications, stem from an unusually favorable combination of optical and electronic properties, with the ability to be solution processed into films. This defines them as a brand new class of semiconductors that can rival or exceed the performance of the venerable classes of III-V and II-IV semiconductors, which presently dominate the industries of applied optoelectronics. Our aim in this Account is to highlight the basic pillars that define the chemistry of the halide perovskites and their unconventional electronic properties through the prism of structure-property relationships. We focus on the synthetic requirements under which a halide perovskite can exist and emphasize how the synthetic conditions can determine the structural integrity and the bulk properties of the perovskites. Then we proceed to discuss the origins of the optical and electronic phenomena, using the perovskite crystal structure as a guide. Some of the most remarkable features of the perovskites dealt with in this Account include the evolution of a unique type of defect, which gives rise to superlattices. These can enhance or diminish the fluorescence properties of the perovskites. For example, the exotic self-doping ability of the Sn-based perovskites allows them to adopt electrical properties from semiconducting to metallic. We attempt to rationalize how these properties can be tuned and partially controlled through targeted synthetic procedures for use in electronic and optical devices. In addition, we address open scientific questions that pose big obstacles in understanding the fundamentals of perovskites. We anticipate that the answers to these questions will provide the impetus upon which future research directions will be founded.
Wavelet-Based Traffic Analysis for Identifying Video Streams over Broadband Networks (2008)

Network and service providers are rapidly deploying IPTV networks to deliver a wide variety of video content to subscribers. Some video content may be protected by copyright and/or may be subject to distribution restrictions. Encryption technologies may not always be effective to manage protected video content, particularly when video content is legally decrypted upon receipt by a subscriber. This paper presents a new approach to detect if specific (or protected) downloaded video is being redistributed by a subscriber using the broadband Internet connection. The approach employs a traffic-based signature of the protected video clip. The signature which is shown to be unique is stored in a signature store. We adopt a wavelet-based analysis to match video streams captured from the network to the signatures in the store. The performance of the detection algorithm is evaluated using a large video database populated with a variety of movies and TV shows. The experiment results show that our algorithm achieves high detection rates and low false alarm rates using video clips of only a few seconds.
Real-time fatigue life monitoring based on thermodynamic entropy (2010)

This article presents a methodology for real-time monitoring of fatigue life in machinery components that utilizes the accumulation of entropy to assess the severity of degradation associated with fatigue. Using this concept, a prototype called the fatigue monitoring unit that automatically shuts down the machine prior to the onset of fatigue fracture based on a user-specified factor of safety is developed. The method is applicable to variable loading and does not require the specification of the loading history or loading sequence. The results of a series of laboratory fatigue tests pertaining to Al 6061-T6 and SS 304 specimens, which show the utility of the approach and its suitability for implementation in the field, are provided.
Simultaneous Differentiation of the N1 to N9 Neuraminidase Subtypes of Avian Influenza Virus by a GeXP Analyzer-Based Multiplex Reverse Transcription PCR Assay (2019)

To date, nine neuraminidase (NA) subtypes of avian influenza virus (AIV) have been identified in poultry and wild birds. Rapid and effective methods for differentiating these nine NA subtypes are needed. We developed and validated a rapid, sensitive, and robust method utilizing a GeXP analyzer-based multiplex RT-PCR assay and capillary electrophoresis for the simultaneous differentiation of the N1 to N9 subtypes in a single-tube reaction. Ten pairs of primers-nine subtype-specific pairs and one pan-AIV pair-were screened and used to establish the GeXP multiplex RT-PCR assay. A single subtype was detected using the developed GeXP assay; the N1 to N9 AIV subtypes individually generated two target peaks: the NA subtype-specific peak and the general AIV peak. Different concentrations of multiplexed subtypes were tested with this GeXP assay and the peaks of the corresponding NA subtypes were generated, suggesting that this GeXP assay is useful for identifying NA subtypes in mixed samples. Moreover, no peaks were generated for other important avian viruses, indicating negative results and validating the lack of cross-reactions between AIV subtypes and other avian pathogens. RNA templates synthesized through <i>in vitro</i> transcription were used to analyze the sensitivity of the assay; the limit of detection was 100 copies per reaction mixture. The results obtained from clinical samples using this GeXP method were consistent with the results of the neuraminidase inhibition (NI) test, and the ability of the GeXP assay to identify mixed infections was superior to amplicon sequencing of isolated viruses. In conclusion, this GeXP assay is proposed as a specific, sensitive, rapid, high-throughput, and versatile diagnostic tool for nine NA subtypes of AIV.
Salience Preserving Image Fusion with Dynamic Range Compression (2006)

Gradient conveys important salient features in images. Traditional fusion methods based on gradient generally treat gradients from multichannels as a multi-valued vector, and compute its global statistics under the assumption of identical distribution. However, different source channels may reflect different important salient features, and their gradients are basically non-identically distributed. This prevents existing methods from successful salience preservation. In this paper, we propose to fuse the gradients from multi-channels in the concept of saliency. We first measure the salience map of each channel's gradient, and then use their saliency to weight their contribution in computing the global statistics. Gradients with high saliency are properly highlighted in the target gradient, and thereby salient features in the sources are well preserved. Furthermore, we handle the dynamic range problem by applying range compression on the target gradient, and thereby halo effect is effectively reduced.
Total Synthesis of Resveratrol‐Based Natural Products: A Chemoselective Solution (2007)

Chemoselektivität ist der Schlüssel: Der Naturstoff Resveratrol (1) ist seiner starken biologischen Aktivität wegen ausführlich untersucht worden, wogegen Resveratrol-Oligomere (wie 2–4) bisher kaum Beachtung fanden. Ein allgemeiner Syntheseansatz macht die vielfältigen und komplexen Strukturen dieser Verbindungsklasse zugänglich.
Thromboxane synthetase inhibitors (TXSI). Design, synthesis, and evaluation of a novel series of .omega.-pyridylalkenoic acids (1985)

A novel series of omega-pyridylalkenoic acids has been prepared by applying the Wittig reaction. Modifications were made in the omega-aryl moiety, the alkylene chain length, the alpha-methylene group adjacent to the carbonyl group, and the carboxyl group of the molecule. The compounds were tested as inhibitors of thromboxane synthetase in an in vitro assay and in ex vivo experiments with the rat. Most members of this new class of thromboxane synthetase inhibitors (TXSI) showed good activity in both assay systems. (E)-7-Phenyl-7-(3-pyridyl)-6-heptenoic acid (9c; CV-4151) was one of the most potent compounds in in vitro enzyme inhibition (IC50 = 2.6 X 10(-8) M) and, when orally administered, the most potent and long acting in the inhibition of blood thromboxane A2 production in the rat. New conceptual models I-III for the enzyme-substrate (prostaglandin H2, PGH2) and the enzyme-TXSI interactions are proposed for understanding the molecular design and structure-activity relations.
SVM in oracle database 10g: removing the barriers to widespread adoption of support vector machines (2005)

Contemporary commercial databases are placing an increased emphasis on analytic capabilities. Data mining technology has become crucial in enabling the analysis of large volumes of data. Modern data mining techniques have been shown to have high accuracy and good generalization to novel data. However, achieving results of good quality often requires high levels of user expertise. Support Vector Machines (SVM) is a powerful state-of-the-art data mining algorithm that can address problems not amenable to traditional statistical analysis. Nevertheless, its adoption remains limited due to methodological complexities, scalability challenges, and scarcity of production quality SVM implementations. This paper describes Oracle's implementation of SVM where the primary focus lies on ease of use and scalability while maintaining high performance accuracy. SVM is fully integrated within the Oracle database framework and thus can be easily leveraged in a variety of deployment scenarios.
Multicore Assemblies Potentiate Magnetic Properties of Biomagnetic Nanoparticles (2011)

Highly potent magnetic nanomaterials are developed by encasing multiple magnetic cores inside a thin silica shell, in much the same way as the pomegranate fruit contains many seeds within a thin skin. This construct not only produces materials that are biocompatible but also ones that reach theoretically maximum transverse relaxivity. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
BaMgF<sub>4</sub> thin film development and processing for ferroelectric FETS (1993)

Abstract A ferroelectric memory field-effect transistor (FEMFET) where a ferroelectric thin film is incorporated directly into the gate structure of the transistor is attractive, because it provides not only nonvolatility, but also nondestructive readout (NDRO). At Westinghouse, we are currently developing a FEMFET using thin film barium magnesium fluoride (BaMgF4), a ferroelectric material that was discovered in 1969, but was not fabricated in thin film form until 1989. The BaMgF4 films are grown by evaporation in an ultrahigh vacuum (UHV) chamber on clean Si(100). The natural tendency of these films to grow with the ferroelectric a-axis in the Si(100) plane has been overcome to obtain more random orientation with larger reversible polarization perpendicular to the film. A capping layer (SiO2) has been found to be essential for process integrability of these BaMgF4 films. Ti-W metallization produced only a slight reduction in the capacitance-voltage (C-V) memory window. Switching speed of these films has been measured to be 40 to 45 nanoseconds. The first FEMFET fabricated with BaMgF4 has exhibited 18 Volt memory hysteresis window with better than 105 on/off current ratio for 20 Volt programming.
Power control for link quality protection in cellular DS-CDMA networks with integrated (packet and circuit) services (1999)

Article Power control for link quality protection in cellular DS-CDMA networks with integrated (packet and circuit) services Share on Authors: Deepak Ayyagari 40 Sylvan Rd., GTE Laboratories Inc., Waltham, Ma. 40 Sylvan Rd., GTE Laboratories Inc., Waltham, Ma.View Profile , Anthony Ephremides Dept. of Electrical Engg., Institute for Systems Research, University of Maryland, College park, Md. Dept. of Electrical Engg., Institute for Systems Research, University of Maryland, College park, Md.View Profile Authors Info & Claims MobiCom '99: Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networkingAugust 1999 Pages 96–101https://doi.org/10.1145/313451.313495Online:01 August 1999Publication History 8citation344DownloadsMetricsTotal Citations8Total Downloads344Last 12 Months0Last 6 weeks0 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 Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access
Digital clock frequency doubler (2005)

A digital clock frequency doubler capable of handling large variation in input duty cycle and PVT (process, voltage and temperature) is presented. Unlike the conventional clock frequency doublers, the proposed circuit doesn't require 50% duty cycle for doubling the input clock frequency and consumes lower silicon area. A digital algorithm is used to generate output frequency and an inbuilt PVT compensation mechanism ensures good frequency stability if there is any change in PVT. The circuit has been designed in 90nm CMOS process with input frequency range of 10MHz to 30MHz and silicon results show less than 0.2% of average frequency error
OPTICAL DATA STORAGE USING A SOLID IMMERSION LENS (1995)

A near-field optical technique, using a new type of Solid Immersion Lens (SIL), has been developed and applied to the writing and reading of domains in a magneto-optic material. The SIL is a truncated glass sphere which serves to increase the numerical aperture of the optical system by n2, where n is the index of refraction of the lens material. By mounting a 1 mm SIL on a slider, we have been able to fly the SIL on a magneto-optical disk. We have demonstrated writing and reading with such a lens at data rates exceeding 1 Mbit/s with a carrier-to-noise ratio of approximately 50 dB. Using a 830 nm laser and a n = 1.5 SIL, the focused spot size was reduced by close to a factor of 2 and was measured to be 600 nm.
Challenging Conventional Wisdom: Finding High-Performance Electrodes for Light-Emitting Electrochemical Cells (2018)

The light-emitting electrochemical cell (LEC) exhibits capacity for efficient charge injection from two air-stable electrodes into a single-layer active material, which is commonly interpreted as implying that the LEC operation is independent of the electrode selection. Here, we demonstrate that this is far from the truth and that the electrode selection instead has a strong influence on the LEC performance. We systematically investigate 13 different materials for the positive anode and negative cathode in a common LEC configuration with the conjugated polymer Super Yellow as the electroactive emitter and find that Ca, Mn, Ag, Al, Cu, indium tin oxide (ITO), and Au function as the LEC cathode, whereas ITO and Ni can operate as the LEC anode. Importantly, we demonstrate that the electrochemical stability of the electrode is paramount and that particularly electrochemical oxidation of the anode can prohibit the functional LEC operation. We finally report that it appears preferable to design the device so that the heights of the injection barriers at the two electrode/active material interfaces are balanced in order to mitigate electrode-induced quenching of the light emission. As such, this study has expanded the set of air-stable electrode materials available for functional LEC operation and also established a procedure for the evaluation and design of future efficient electrode materials.
Novel active differential phase splitters in RFIC for wireless applications (1998)

Two novel active differential phase splitters have been designed and fabricated in a GaAs MESFET process. The new circuits employ a concept of feedback to adjust gain and phase unbalance separately and accurately. The active phase splitters feature simplicity, low power supply, and wide-band performance. The circuits can provide /spl plusmn/1 dB and 180/spl plusmn/1/spl deg/ differential signals within 4 GHz bandwidth, well covering the frequency range currently used for dual-band commercial wireless communications. In narrow-band application, more accurate balanced differential signals can be achieved by external tuning.
Twin-focus photothermal correlation spectroscopy (2012)

We introduce a novel concept for optical correlation spectroscopy of non-fluorescent absorbing nano-particles termed twin-focus photothermal correlation spectroscopy (Twin-PhoCS). This method exhibits a unique axial sensitivity, allowing for either the measurement of very slow axial dynamics or the determination of axial heterogeneities on sub-diffraction limited length-scales. To this end, the photothermal nano-lensing mechanism [Markus Selmke, Romy Schachoff, Marco Braun, and Frank Cichos, ACS Nano, 2012, 6(3), 2741] provides two sharply separated detection-subvolumes, comprising the twin-focus. The achieved axial sensitivity is superior to single detection-volume or dual-focus based fluorescence correlation spectroscopies. We demonstrate the sensitivity by measuring radiation-pressure induced flow velocities of diffusing 14 nm gold-colloids down to 10 nm ms−1 with the help of the provided analytical correlation functions.
General Forms and Properties of Zero Cross-Correlation Radar Waveforms (1990)

General forns for both UW complementary and mneompkmentory zero croes-correlation waveform sets are developed.Various propertks of these codes and their relatiomhip (0 aero sidelobe periodk codes arc stated and proved.Also, some radar applications and prsctkal adderatiom of using these d e s are briefly discussed.
Robust treatment planning with conditional value at risk chance constraints in intensity‐modulated proton therapy (2017)

With explicit control of plan robustness, the chance-constrained robust optimization model generated superior IMPT plans compared to the PTV-based method.
Elliptical helical antenna with parasitic wire for CP band enhancement (2007)

In this paper, elliptical helical antenna with parasitic element is proposed to radiate the circularly polarized waves. By winding a parasitic wire properly in parallel with the elliptical helical antenna, the axial ratio bandwidth is enhanced, and simple single feeding mechanism is maintained. The simulation by IE3D shows that the CP bandwidth can be increased from 13.6% to 25%, and the directivity is enhanced by 2dB in the frequency band when the eccentricity of the cross-section is 0.94.
Power supply arcing (2002)

The trend to pack more power in smaller spaces is leading to higher rates of computer power supply arcing in the field. Power density increase is being achieved by decreasing the spacing between features such as the power train MOSFET leads and by increasing the switching frequency. Both of these changes make power supplies more prone to field arcing. This paper discloses a technique called the partial vacuum test to predict the arcing propensity in power supplies. The partial vacuum test also helps determine the corrective actions needed to avoid field arcing by indicating the locations susceptible to arcing. The paper also describes a test called the zinc spray test that can help determine the minimum spacing between features, subjected to high voltages with high frequency harmonics, that will not arc in the field.
Antiviral Activity of Single‐Dose PRO 140, a CCR5 Monoclonal Antibody, in HIV‐Infected Adults (2008)

ISRCTN Register: ISRCTN45537485 .
Graphite-Fiber-Reinforced Glass for Spacecraft Applications (1981)

A recent report [1] describes a program performed under National Aeronautics Space Administration (NASA) Langley sponsorship to establish the fabrication procedures and properties of a new graphite-fiber-reinforced composite for applications requiring exceptional stability over a wide range of temperatures and environments. The system, based on the use of a wide variety of graphite fibers to reinforce glass matrices, will help meet the increasing need for high-temperature, stable, low-density composites. It is a direct outgrowth of the well-developed technology of resin-matrix composites in that the matrix can be caused to flow and encapsulate the reinforcing fibers without damaging them. Also, as in the case of resin- and metal-matrix composites, the elastic modulus of the fibers exceeds that of the matrix enough to provide effective reinforcement. The development of the fabrication procedures and technology that led to these recent data can be traced through three interim technical reports [2–4] and several publications [5–7]. The current report summarizes the most important aspects of the work and describes the most recently developed composites and their properties.