gebhart/patrepeval huggingface dataset:
A circular Viterbi algorithm for decoding tailbiting convolutional codes (2002)

These algorithms are used in blockwide transmission to save the overhead of a known tail. The basic ideas are: (1) continue conventional seamless continuous Viterbi decoding beyond the block boundary by recording and repeating the received block of (soft) symbols; (2) start the decoding process in all states; and (3) end the decoding process either adaptively or with a fixed length. Three robust adaptive stopping rules are constructed and evaluated. Simulation results and a comparison to previously known algorithms are presented.
VIP (2014)

Emerging information-centric networking architectures seek to optimally utilize both bandwidth and storage for efficient content distribution. This highlights the need for joint design of traffic engineering and caching strategies, in order to optimize network performance in view of both current traffic loads and future traffic demands. We present a systematic framework for joint dynamic interest request forwarding and dynamic cache placement and eviction, within the context of the Named Data Networking (NDN) architecture. The framework employs a virtual control plane which operates on the user demand rate for data objects in the network, and an actual plane which handles Interest Packets and Data Packets. We develop distributed algorithms within the virtual plane to achieve network load balancing through dynamic forwarding and caching, thereby maximiz- ing the user demand rate that the NDN network can satisfy. Numerical experiments within a number of network settings demonstrate the superior performance of the resulting algorithms for the actual plane in terms of low user delay and high rate of cache hits.
Digital Enhanced V$^{2}$-Type Constant On-Time Control Using Inductor Current Ramp Estimation for a Buck Converter With Low-ESR Capacitors (2012)

This paper proposes a new digital enhanced V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> -type constant on-time control architecture for solving the ripple oscillation issues when using low-equivalent series resistance (ESR) capacitors in a buck converter. Instead of directly sensing the inductor current, an inductor current ramp estimator with the drift compensation is presented as adding a virtual ESR ripple to the output voltage. Only the input and output voltages are required to be sampled with analog-to-digital converters (ADCs) for estimating the inductor current ramp. Since the sampling rate and resolution requirements of ADCs for voltage sensing are usually less critical with compared to direct current sensing, the proposed digital control architecture is practical for low-cost applications. Besides, the limit-cycle oscillations due to the sampling effects can also be improved by using the estimated current ramp. Furthermore, the small-signal model of the proposed digital enhanced V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> control architecture is provided to design the estimated current ramp amplitude to stabilize the system and to optimize the system performance. The drift compensation effect is also analyzed in this paper. The effectiveness of the proposed control architecture with the current ramp estimator has been verified with simulation and experimental results by using an FPGA-based hardware platform.
ATandT: The TagandParse Approach to Semantic Parsing of Robot Spatial Commands (2014)

The Tag&Parse approach to semantic parsing first assigns semantic tags to each word in a sentence and then parses the tag sequence into a semantic tree. We use statistical approach for tagging, parsing, and reference resolution stages. Each stage produces multiple hypotheses which are re-ranked using spatial validation. We evaluate the Tag&Parse approach on a corpus of Robotic Spatial Commands as part of the SemEval Task6 exercise. Our system accuracy is 87.35% and 60.84% with and without spatial validation.
A Transient Hydrostatic Dynamometer for Single Cylinder Engine Research With Real Time Multi-Cylinder Dynamic Simulation (2003)

A new high-bandwidth transient hydrostatic dynamometer test system has been developed that accurately replicates multi-cylinder engine operation using a single-cylinder research engine. Single-cylinder engines are typically used for research because of their low cost and good cylinder accessibility for instrumentation and optics. This dynamometer maintains these advantages while dramatically improving transient and low speed testing capabilities. The system also incorporates hardware-in-the-loop models for simulation of other components that would typically be present in a vehicle application. These models include: adjoining cylinders and ancillary components in the engine, the transmission, driveline, and vehicle load. Utilizing these models it is possible to replicate actual driving cycles. This high-bandwidth transient dynamometer extends the test capabilities of single-cylinder research far beyond the traditional steady state regime, enabling transient speed single-cylinder engine research while providing single-cylinder engine operation that is comparable to the multi-cylinder engine.
Synthetic tracked aperture ultrasound imaging: design, simulation, and experimental evaluation (2016)

Ultrasonography is a widely used imaging modality to visualize anatomical structures due to its low cost and ease of use; however, it is challenging to acquire acceptable image quality in deep tissue. Synthetic aperture (SA) is a technique used to increase image resolution by synthesizing information from multiple subapertures, but the resolution improvement is limited by the physical size of the array transducer. With a large F-number, it is difficult to achieve high resolution in deep regions without extending the effective aperture size. We propose a method to extend the available aperture size for SA-called synthetic tracked aperture ultrasound (STRATUS) imaging-by sweeping an ultrasound transducer while tracking its orientation and location. Tracking information of the ultrasound probe is used to synthesize the signals received at different positions. Considering the practical implementation, we estimated the effect of tracking and ultrasound calibration error to the quality of the final beamformed image through simulation. In addition, to experimentally validate this approach, a 6 degree-of-freedom robot arm was used as a mechanical tracker to hold an ultrasound transducer and to apply in-plane lateral translational motion. Results indicate that STRATUS imaging with robotic tracking has the potential to improve ultrasound image quality.
Gaze estimation for off-angle iris recognition based on the biometric eye model (2013)

Iris recognition is among the highest accuracy biometrics. However, its accuracy relies on controlled high quality capture data and is negatively affected by several factors such as angle, occlusion, and dilation. Non-ideal iris recognition is a new research focus in biometrics. In this paper, we present a gaze estimation method designed for use in an off-angle iris recognition framework based on the ORNL biometric eye model. Gaze estimation is an important prerequisite step to correct an off-angle iris images. To achieve the accurate frontal reconstruction of an off-angle iris image, we first need to estimate the eye gaze direction from elliptical features of an iris image. Typically additional information such as well-controlled light sources, head mounted equipment, and multiple cameras are not available. Our approach utilizes only the iris and pupil boundary segmentation allowing it to be applicable to all iris capture hardware. We compare the boundaries with a look-up-table generated by using our biologically inspired biometric eye model and find the closest feature point in the look-up-table to estimate the gaze. Based on the results from real images, the proposed method shows effectiveness in gaze estimation accuracy for our biometric eye model with an average error of approximately 3.5 degrees over a 50 degree range.
Synthesis of 5,6-Dihydro-4-hydroxy-2- pyrones as HIV-1 Protease Inhibitors:  The Profound Effect of Polarity on Antiviral Activity (1997)

ADVERTISEMENT RETURN TO ISSUELetterNEXTSynthesis of 5,6-Dihydro-4-hydroxy-2- pyrones as HIV-1 Protease Inhibitors: The Profound Effect of Polarity on Antiviral ActivitySusan E. Hagen, J. V. N. Vara Prasad, Frederick E. Boyer, John M. Domagala, Edmund L. Ellsworth, Christopher Gajda, Harriet W. Hamilton, Larry J. Markoski, Bruce A. Steinbaugh, Bradley D. Tait, Elizabeth A. Lunney, Peter J. Tummino, Donna Ferguson, Donald Hupe, Carolyn Nouhan, Stephen J. Gracheck, James M. Saunders, and Steven VanderRoestView Author Information Departments of Chemistry, Biomolecular Structure and Drug Design, Biochemistry, and Infectious Diseases, Parke-Davis Pharmaceutical Research, Division of Warner Lambert, 2800 Plymouth Road, Ann Arbor, Michigan 48105Cite this: J. Med. Chem. 1997, 40, 23, 3707–3711Publication Date (Web):November 7, 1997Publication History Received6 August 1997Published online7 November 1997Published inissue 1 November 1997https://pubs.acs.org/doi/10.1021/jm970522yhttps://doi.org/10.1021/jm970522yrapid-communicationACS PublicationsCopyright © 1997 American Chemical SocietyRequest reuse permissionsArticle Views614Altmetric-Citations55LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Alkyls,Antimicrobial agents,Inhibitors,Peptides and proteins,Viruses Get e-Alerts
Robust recognition of complex entities in text exploiting enterprise data and NLP-techniques (2008)

Data transactions between business partners often include unstructured data such as invoices or purchase orders. In order to process such automatically, complex business entities need to be identified. Examples for complex entities are products, business partners and purchase orders which are stored in a supplier relationship management system. Both, structured records in the enterprise system and text data, describe these complex entities. A major challenge is to correctly associate entities recognized in unstructured data with entities stored in structured data, e.g. enterprise databases. We address that problem and propose a robust process methodology which includes three phases: candidate extraction from unstructured text, generation of initial mappings with structured data and disambiguation of the mappings exploiting relationships among the entities in the enterprise data and the documentspsila structure. We describe each step in detail, propose a common architecture and introduce to our data model and algorithms.
Compressed Sensing Image Reconstruction of Scanning Electrochemical Microscopy Measurements Carried Out at Ultrahigh Scan Speeds Using Continuous Line Probes (2021)

Previous studies on scanning electrochemical microscopy (SECM) imaging with nonlocal continuous line probes (CLPs) have demonstrated the ability to increase areal imaging rates by an order of magnitude compared to SECM based on conventional ultramicroelectrode (UME) disk electrodes. Increasing the linear scan speed of the CLP during imaging presents an opportunity to increase imaging rates even further but results in a significant deterioration in image quality due to transport processes in the liquid electrolyte. Here, we show that compressed sensing (CS) postprocessing can be successfully applied to CLP-based SECM measurements to reconstruct images with minimal distortion at probe scan rates greatly exceeding the conventional SECM ″speed limit″. By systematically evaluating the image quality of images generated by adaptable postprocessing CS methods for CLP-SECM data collected at varying scan rates, this work establishes a new upper bound for CLP scan rates. While conventional SECM imaging typically uses probe scan speeds characterized by Péclet numbers (<i>Pe</i>) < 1, this study shows that CS postprocessing methods can allow for an accurate image reconstruction for <i>Pe</i> approaching 5, corresponding to an order of magnitude increase in the maximum probe scan speed. This upper limit corresponds to the onset of chaotic convective flows within the electrolyte for the probes investigated in this work, highlighting the importance of considering hydrodynamics in the design of fast-scanning probes.
100  Tbit/s free-space data link enabled by three-dimensional multiplexing of orbital angular momentum, polarization, and wavelength (2014)

We investigate the orthogonality of orbital angular momentum (OAM) with other multiplexing domains and present a free-space data link that uniquely combines OAM-, polarization-, and wavelength-division multiplexing. Specifically, we demonstrate the multiplexing/demultiplexing of 1008 data channels carried on 12 OAM beams, 2 polarizations, and 42 wavelengths. Each channel is encoded with 100 Gbit/s quadrature phase-shift keying data, providing an aggregate capacity of 100.8 Tbit/s (12×2×42×100 Gbit/s).
Diagnostics of Impulse Line Blockage with Multi-sensing Differential Pressure Transmitter at Air Line (2009)

Differential pressure transmitter with an orifice is widely used as a major field flowmeter. A major drawback of this flowmeter used at operation sites is the blockage of an impulse line, which connects a differential pressure transmitter with an orifice tap. In our previous studies, experiments at a water line showed that the diagnostic method based on the pressure fluctuations in the impulse line can diagnose the blockage in the steady state. In this method, however, there was a possibility of making a wrong diagnosis in the transient state. This paper clarifies the applicable conditions of two diagnostic methods: the diagnostic method based on the pressure fluctuations and the diagnostic method based on the phase difference. In particular, the effectiveness of two diagnostic methods in both steady and transient states is investigated by comparing the experimental results at an air line with those obtained at the water line. Through experimental investigations, the following results are derived: (1) The line pressure change has a harmful effect on the blockage diagnosis with the pressure fluctuations. (2) The diagnostic method based on the phase difference can diagnose the blockage even in the transient state; however, this method cannot diagnose the blockage, where the pressure fluctuations are not transmitted at an air line. Therefore, the method based on phase differences remains to be improved in the future work.
A de-jittering scheme for the transport of MPEG-4 and MPEG-2 video over ATM (2003)

A de-jittering scheme which can be used in the transport of MPEG-4 and MPEG-2 video to absorb any introduced network jitter is proposed. The essence of the de-jittering scheme is based on the statistical approximation of the delay variation in the arrival times of video packets carrying encoded clock reference values and a filtering and re-stamping mechanism. In addition, an overview of the MPEG-4 system is presented.
Integrated Fault Location System for Power Distribution Feeders (2013)

A fast accurate fault location solution for power distribution feeders enables utility companies to clear a fault quicker and reduce the outage duration. Traditional impedance-based fault location methods assume that all feeder sections have the same impedance characteristics. This assumption introduces errors on feeders that have branches and line sections with different conductor types and tower configurations. Automated meter reading and trouble call systems provide fault location estimation only for faults that are isolated by field devices. This paper presents a new impedance-based method that estimates all possible fault locations by using a detailed feeder model and fault event reports, complemented with information from other intelligent field devices. Field test results show significant benefits from using the new method over the traditional method. This paper also describes a real-world fault location system that implements the reported method and provides automated fault location estimation within 1 min after the fault occurs.
Cryptographic support for secure logs on untrusted machines (1998)

In many real-world applications, sensitive information must be kept in log files on an untrusted machine. In the event that an attacker captures this machine, we would like to guarantee that he will gain little or no information from the log files and to limit his ability to corrupt the log files. We describe a computationally cheap method for making all log entries generated prior to the logging machine&apos;s compromise impossible for the attacker to read, and also impossible to undetectably modify or destroy.
Construction and applications of an atomic magnetic gradiometer based on nonlinear magneto-optical rotation (2006)

We report on the design, characterization, and applications of a sensitive atomic magnetic gradiometer. The device is based on nonlinear magneto-optical rotation in alkali-metal (Rb87) vapor and uses frequency-modulated laser light. The magnetic field produced by a sample is detected by measuring the frequency of a resonance in optical rotation that arises when the modulation frequency equals twice the Larmor precession frequency of the Rb atoms. The gradiometer consists of two atomic magnetometers. The rotation of light polarization in each magnetometer is detected with a balanced polarimeter. The sensitivity of the gradiometer is 0.8nG∕Hz1∕2 for near-dc (0.1Hz) magnetic fields, with a base line of 2.5cm. For applications in nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI), a long solenoid that pierces the magnetic shields provides an ∼0.5G leading field for the nuclear spins in the sample. Our apparatus is particularly suited for remote detection of NMR and MRI. We demonstrate a point-by-point free induction decay measurement and a spin echo reconstructed with a pulse sequence similar to the Carr-Purcell-Meiboom-Gill pulse. Additional applications and future improvements are also discussed.
Progressive geometry compression (2000)

We propose a new progressive compression scheme for arbitrary topology, highly detailed and densely sampled meshes arising from geometry scanning. We observe that meshes consist of three distinct components: geometry, parameter, and connectivity information. The latter two do not contribute to the reduction of error in a compression setting. Using semi-regular meshes, parameter and connectivity information can be virtually eliminated. Coupled with semi-regular wavelet transforms, zerotree coding, and subdivision based reconstruction we see improvements in error by a factor four (12dB) compared to other progressive coding schemes.
Loss-of-function mutation of the SCN3B-encoded sodium channel  3 subunit associated with a case of idiopathic ventricular fibrillation (2009)

This study provides molecular and cellular evidence implicating mutations in Navbeta3 as a cause of IVF.
Shaping mycolactone for therapeutic use against inflammatory disorders (2015)

Inflammation adversely affects the health of millions of people worldwide, and there is an unmet medical need for better anti-inflammatory drugs. We evaluated the therapeutic interest of mycolactone, a polyketide-derived macrolide produced by Mycobacterium ulcerans. Bacterial production of mycolactone in human skin causes a combination of ulcerative, analgesic, and anti-inflammatory effects. Whereas ulcer formation is mediated by the proapoptotic activity of mycolactone on skin cells via hyperactivation of Wiskott-Aldrich syndrome proteins, analgesia results from neuronal hyperpolarization via signaling through angiotensin II type 2 receptors. Mycolactone also blunts the capacity of immune cells to produce inflammatory mediators by an independent mechanism of protein synthesis blockade. In an attempt to isolate the structural determinants of mycolactone's immunosuppressive activity, we screened a library of synthetic subunits of mycolactone for inhibition of cytokine production by activated T cells. The minimal structure retaining immunosuppressive activity was a truncated version of mycolactone, missing one of the two core-branched polyketide chains. This compound inhibited the inflammatory cytokine responses of human primary cells at noncytotoxic doses and bound to angiotensin II type 2 receptors comparably to mycolactone in vitro. Notably, it was considerably less toxic than mycolactone in human primary dermal fibroblasts modeling ulcerative activity. In mouse models of human diseases, it conferred systemic protection against chronic skin inflammation and inflammatory pain, with no apparent side effects. In addition to establishing the anti-inflammatory potency of mycolactone in vivo, our study therefore highlights the translational potential of mycolactone core-derived structures as prospective immunosuppressants.
Sample-based synthesis of photo-realistic talking heads (2002)

The paper describes a system that generates photo-realistic video animations of talking heads. First the system derives head models from existing video footage using image recognition techniques. It locates, extracts and labels facial parts such as mouth, eyes, and eyebrows into a compact library. Then, using these face models and a text-to-speech synthesizer, it synthesizes new video sequences of the head where the lips are in synchrony with the accompanying soundtrack. Emotional cues and conversational signals are produced by combining head movements, raising eyebrows, wide open eyes, etc. with the mouth animation. For these animations to be believable, care has to be taken aligning the facial parts so that they blend smoothly into each other and produce seamless animations. Our system uses precise multi channel facial recognition techniques to track facial parts, and it derives the exact 3D position of the head, enabling the automatic extraction of normalized face parts. Such talking head animations are useful because they generally increase intelligibility of the human machine interface in applications where content needs to be narrated to the user, such as educative software.