gebhart/patrepeval huggingface dataset:
Robust yaw damping of cars with front and rear wheel steering (1993)

For a linear model of active car steering, a robust decoupling control law by feedback of the yaw rate to front wheel steering has previously been derived. This control law is extended by feedback of the yaw rate to rear wheel steering. A controller structure with one free damping parameter k/sub D/ is derived with the following properties: damping and natural frequency of the yaw mode are independent of speed; k/sub D/ can be adjusted to the desired damping level; and a variation of k/sub D/ has no influence on the natural frequency of the yaw mode and no influence on the steering transfer function by which the driver keeps the car-considered as a mass point at the front axle-on a planned path. Simulations with a nonlinear car steering model show significant safety advantages of the new control concept in situations when the driver of the conventional car has to stabilize unexpected yaw motions.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Operations of the dominant harmonic active filter (DHAF) under realistic utility conditions (2002)

This paper presents laboratory test results of the dominant harmonic active filter (DHAF) prototype. The DHAF system achieves harmonic isolation at the dominant harmonics using a square-wave active filter inverter. The key advantages of the DHAF system are the low rating and low bandwidth requirements of the active filter inverter. Such characteristics allow cost-effective and viable applications of the DHAF system to mitigate harmonic problems for high power nonlinear loads (10-100 MW and above). Several practical situations, including source-sink resonance, ambient harmonic interferences and unbalance grid voltages are applied to the DHAF prototype to validate its performance. The operation principles of the DHAF system and the synchronous reference frame (SRF) based controller are discussed to explain how harmonic isolation at the dominant harmonics is accomplished. A design example of the DHAF system for a 20 MVA rectifier load at an industrial site is also given to illustrate its application.
Two- Phase Estimation Method and Improved RBFN for Taste Sensor (2005)

In this paper, we propose two-phase estimation method and improved RBFN(radial basis function network: RBFN) for taste sensor. Estimation of taste is important not only for analytical chemistry but also for robotics and development of products. Taste sensor estimates the taste from ion concentrations. Ion concentration is estimated from responses of a chemical sensor. Sometimes a sensor response for an ion is affected by two or more ions. In such a case, we have to know their concentrations in advance. In order to estimate such ion concentration, two-phase estimation method is employed for neural network: some outputs of the neural networks in the first phase are used as inputs in the second phase. RBFN is very fast in network training. However, the accuracy depends on learning datasets and it often falls into over-learning. We modified RBFN to solve these problems. There are two improvements: basis function optimization and weight decay term. Due to basis function optimization, basis functions can be constructed depending on distribution of learning datasets. It adjusts the radii of basis functions so that estimation with high accuracy is possible for wide range, and interpolation capability of the network is also improved. Weight decay term prevents weights from adapting to the noise. It contributes to reduce the problem of over-learning.
No app needed (2017)

For tourists, interactions with digital public displays often depend on specific technologies that users may not be familiar with (QR codes, NFC, Bluetooth); may not have access to because of networking issues (SMS), may lack a required app (QR codes), or device technology (NFC); may not want to use because of time constraints (WiFi, Bluetooth); or may not want to use because they are worried about sharing their data with a third-party service (text, WiFi). In this demonstration, we introduce ItineraryScanner, a system that allows users to seamlessly share content with a public travel kiosk system.
Structure-Preserving Subgraph Query Services (2015)

A fundamental problem of graph databases is subgraph isomorphism query (a.k.a subgraph query): given a query graph Q and a graph database, it retrieves the graphs Gs from the database that contain Q. Due to the cost of managing massive data coupled with the computational hardness of subgraph isomorphism testing, outsourcing the computations to a third-party provider is an appealing alternative. However, confidentiality has been a critical attribute of quality of service (QoS) in query services. To the best of our knowledge, subgraph query services with tunable preservation of privacy of structural information have never been addressed. In this paper, we present the first work on structure-preserving subIso (SPsubIso). A crucial step of our work is to transform subIso-the seminal subgraph isomorphism algorithm (the Ullmann's algorithm)-into a series of matrix operations. We propose a novel cyclic group based encryption (CGBE) method for private matrix operations. We propose a protocol that involves the query client and static indexes to optimize SPsubIso. We prove that the structural information of both Q and G are preserved under CGBE and analyze the privacy preservation in the presence of the optimizations. Our extensive experiments on both real and synthetic datasets verify that SPsubIso is efficient and the optimizations are effective.
In-situ single cell electroporation using optoelectronic tweezers (2008)

Optoelectronic Tweezers are used to achieve light-induced, in-situ electroporation of HeLa cells. By controlling electrical bias, patterned light induces either single cell movement or electroporation. Fluorescent dye and dielectrophoretic response are used to monitor electroporation.
“Cut and Stick” Rubbery Ion Gels as High Capacitance Gate Dielectrics (2012)

A free-standing polymer electrolyte called an ion gel is employed in both organic and inorganic thin-film transistors as a high capacitance gate dielectric. To prepare a transistor, the free-standing ion gel is simply laid over a semiconductor channel and a side-gate electrode, which is possible because of the gel's high mechanical strength.
Small ultrahigh vacuum compatible hyperthermal oxygen atom generator (1994)

The development of a compact, ultrahigh vacuum (UHV) compatible instrument for generating a flux of pure hyperthermal oxygen atoms for NASA applications has been achieved. The instrument combines the mechanisms of O2 dissociation and transport through a hot Ag membrane to provide a continuous source of O atoms to a vacuum interface where they are subsequently emitted into the vacuum space by electron-stimulated desorption (ESD). A flux of neutral O atoms 4.5×1013 cm−2 s−1 (3P) with a mean ion kinetic energy of approximately 5 eV and a full width at half maximum of 4 eV was detected at a quadrupole mass spectrometer located 10 cm away. The geometry of the instrument is such that it is mounted on a 7-cm flange and can be tailored in length and orientation to fit most UHV systems. The data presented here are for ESD-controlled conditions where increases in the flux are strictly linear with electron bombardment current. Calculation shows that transport-controlled conditions can be achieved at temperatures as low as 350 °C with membrane thicknesses on the order of 10 μm.
Synthetic scanner arrays in tomographic reconstructions from fan- and cone-beam projections (1994)

A deterministic method for artifact-free reconstruction from truncated sets of fan-beam projections thatextends the artifact-free zone of fan-beam scanners is presented. Truncated partial sets of projectionsare merged into a complete virtual set of projections before reconstruction through synthetic scannerarrays. The reconstruction from the virtual set of projections yields the artifact-free representation ofthe whole object needed for evaluation of its global structure. The extent of the artifact-free zone in reconstructions from cone-beam projections is evaluated. The concept of synthetic linear and circular scanner arrays for reconstruction from truncated sets of projections is extended to cone-beam geometry. It is shown that linear scanner arrays are not directly applicable to cone-beam geometry but yieldreasonable approximations if the partial sets of projections are resorted into a virtual set of wedge-beam projections before reconstruction. The presented solution constitutes a practical and exact det rministic method of horizontally extending the artifact-free zone in cone-beam geometry. The extension of the vertical limits of the artifact-free zone is discussed. The proposed methods provide a practical low-cost approach to artifact-free reconstruction of large objects. Illustrative examples are provided.
Midwest Guardrail System for Standard and Special Applications (2004)

Development, testing, and evaluation of the Midwest Guardrail System were continued from the original research started in 2000. This new strong-post W-beam guardrail system provides increased safety for impacts with higher-center-of-mass vehicles. Additional design variations of the new system included stiffened versions using reduced (half and quarter) post spacings as well as a standard guardrail design configured with a concrete curb 152 mm (6 in.) high. All full-scale vehicle crash tests were successfully performed in accordance with the Test Level 3 requirements specified in NCHRP Report 350: Recommended Procedures for the Safety Performance Evaluation of Highway Features. The research study also included dynamic bogie testing on steel posts placed at various embedment depths and computer simulation modeling with BARRIER VII to analyze and predict dynamic guardrail performance. Recommendations for the placement of the original Midwest Guardrail System as well as its stiffened variations were also made.
Graphene electrostatic microphone and ultrasonic radio (2015)

We present a graphene-based wideband microphone and a related ultrasonic radio that can be used for wireless communication. It is shown that graphene-based acoustic transmitters and receivers have a wide bandwidth, from the audible region (20∼20 kHz) to the ultrasonic region (20 kHz to at least 0.5 MHz). Using the graphene-based components, we demonstrate efficient high-fidelity information transmission using an ultrasonic band centered at 0.3 MHz. The graphene-based microphone is also shown to be capable of directly receiving ultrasound signals generated by bats in the field, and the ultrasonic radio, coupled to electromagnetic (EM) radio, is shown to function as a high-accuracy rangefinder. The ultrasonic radio could serve as a useful addition to wireless communication technology where the propagation of EM waves is difficult.
Direct uranium measurement by the prompt fission neutron method of pulsed neutron borehole logging (1979)

Objectives of the prompt fission neutron (PFN) logging project consist of a feasibility determination, development of the PFN method and log interpretation, field demonstration of the PFN method and hardware, and support for the commercialization of hardware. This paper presents the current status of the PFN development project. 10 figures. (DLC)
Local anaesthetic medication for the treatment of asthma (2005)

It is presumed that drugs able to prevent bronchial spasm and/or inflammation may have therapeutic potential to control asthma symptoms. The local anaesthetic lidocaine has recently received increased attention as an alternative form of treatment for asthmatic patients. This paper reviews the major findings on the topic and summarizes the putative mechanisms underlying the airway effects of local anaesthetic agents. We think that lidocaine extends the spectrum of options in asthma therapy, probably by counteracting both spasmogenic and inflammatory stimuli in the bronchial airways. The possibility of development of new anti-asthma compounds based on the synthesis of lidocaine derivatives is also on the horizon.
Analysis of Packet Loss for Compressed Video: Effect of Burst Losses and Correlation Between Error Frames (2008)

Video communication is often afflicted by various forms of losses, such as packet loss over the Internet. This paper examines the question of whether the packet loss pattern, and in particular, the burst length, is important for accurately estimating the expected mean-squared error distortion resulting from packet loss of compressed video. We focus on the challenging case of low-bit-rate video where each P-frame typically fits within a single packet. Specifically, we: 1) verify that the loss pattern does have a significant effect on the resulting distortion; 2) explain why a loss pattern, for example a burst loss, generally produces a larger distortion than an equal number of isolated losses; and 3) propose a model that accurately estimates the expected distortion by explicitly accounting for the loss pattern, inter-frame error propagation, and the correlation between error frames. The accuracy of the proposed model is validated with H.264/AVC coded video and previous frame concealment, where for most sequences the total distortion is predicted to within plusmn0.3 dB for burst loss of length two packets, as compared to prior models which underestimate the distortion by about 1.5 dB. Furthermore, as the burst length increases, our prediction is within plusmn0.7 dB, while prior models degrade and underestimate the distortion by over 3 dB. The proposed model works well for video-telephony-type of sequences with low to medium motion. We also present a simple illustrative example, of how knowledge of the effect of burst loss can be used to adapt the schedule of video streaming to provide improved performance for a burst loss channel, without requiring an increase in bit rate.
Separation of multiple secondary surveillance radar sources in a real environment for the near-far case (2007)

Multilateration systems based on secondary surveillance radar (SSR) systems and omnidirectional antennae are operational today (Bezousek, 1998 and Galat, 2004). Assuming the replacement of the single-element antenna by an array, we proposed new algorithms to discriminate overlapped signals in previous works (Petrochilos et al., 2002, 2004 and 2007); other solutions were also proposed in the literature (Roy and Kailath, 1989; Chaumette et al., 1993; and van der Veen and Tol, 1997). Unfortunately, all have either some shortcomings, or an expensive computational cost, or no simple practical implementation. Therefore, we proposed in the work of Petrochilos et al. (2005) a reliable, simple, and effective projection algorithm. Nevertheless, some issues were overlooked: in particular the relative power ratio between the signals to be separated may be important, which we study in this paper with real-life signals.
Poly(styrene-<i>co</i>-<i>n</i>-butyl acrylate) Nanofibers with Excellent Stability against Water by Electrospinning from Aqueous Colloidal Dispersions (2009)

Less brittle nanofibers with excellent stability against water can be prepared via electrospinning of dispersions of styrene−acrylate copolymers from an aqueous environment. The versatility of emulsion polymerization technique allows us to tailor a wide range of properties of the dispersed polymer and the subsequent nanofibers. It was shown that the minimum film formation temperature (MFFT) and correspondingly the glass transition temperature (Tg) of the colloidal polymer, which can be varied by changing the composition of the monomers, have to be in the range of processing temperature, resulting in formation of the fibers with homogeneous morphology and good dimensional stability.
Early disruption of photoreceptor cell architecture and loss of vision in a humanized pig model of usher syndromes (2022)

Usher syndrome (USH) is the most common form of monogenic deaf-blindness. Loss of vision is untreatable and there are no suitable animal models for testing therapeutic strategies of the ocular constituent of USH, so far. By introducing a human mutation into the harmonin-encoding USH1C gene in pigs, we generated the first translational animal model for USH type 1 with characteristic hearing defect, vestibular dysfunction, and visual impairment. Changes in photoreceptor architecture, quantitative motion analysis, and electroretinography were characteristics of the reduced retinal virtue in USH1C pigs. Fibroblasts from USH1C pigs or USH1C patients showed significantly elongated primary cilia, confirming USH as a true and general ciliopathy. Primary cells also proved their capacity for assessing the therapeutic potential of CRISPR/Cas-mediated gene repair or gene therapy in vitro. AAV-based delivery of harmonin into the eye of USH1C pigs indicated therapeutic efficacy in vivo.
Triplet MLCT Photosensitization of the Ring‐Closing Reaction of Diarylethenes by Design and Synthesis of a Photochromic Rhenium(<scp>I</scp>) Complex of a Diarylethene‐Containing 1,10‐Phenanthroline Ligand (2006)

Synthesis of the diarylethene-containing ligand L1 based on Suzuki cross-coupling reaction between thienyl boronic acid and the dibromophenanthroline ligand is reported. On coordination to the rhenium(I) tricarbonyl complex system, the photochromism of L1 could be photosensitized and consequently extended from intraligand excitation at lambda< or =340 nm in the free ligand to metal-to-ligand charge-transfer (MLCT) excitation at lambda< or =480 nm in the complex. The photochromic reactions were studied by (1)H NMR, UV/Vis, and steady-state emission spectroscopy. Photosensitization was further probed by ultrafast transient absorption and time-resolved emission spectroscopy. The results provided direct evidence that the formation of the closed form by the MLCT-sensitized photochromic process was derived from the (3)MLCT excited state. This supports the photosensitization mechanism, which involves an intramolecular energy-transfer process from the (3)MLCT to the (3)IL(L1) state that initiated the ring-closure reaction. The photophysical and electrochemical properties of the complex were also investigated.
In Vivo Intraocular Pressure Measurements Using A Miniaturized Nano-Photonic Sensor Implant (2016)

Purpose : We have been developing a nanophotonic pressure sensor whose optical resonance is directly related to intraocular pressure (IOP). Bench testing has demonstrated sensor near-infrared (NIR) reflectance to accurately track pressures from 0-50 mmHg. The current study examined sensor performance following implantation into rabbit eyes for up to one month.
Interspecies diversity of the occludin sequence: cDNA cloning of human, mouse, dog, and rat-kangaroo homologues. (1996)

Occludin has been identified from chick liver as a novel integral membrane protein localizing at tight junctions (Furuse, M., T. Hirase, M. Itoh, A. Nagafuchi, S. Yonemura, Sa. Tsukita, and Sh. Tsukita. 1993. J. Cell Biol. 123:1777-1788). To analyze and modulate the functions of tight junctions, it would be advantageous to know the mammalian homologues of occludin and their genes. Here we describe the nucleotide sequences of full length cDNAs encoding occludin of rat-kangaroo (potoroo), human, mouse, and dog. Rat-kangaroo occludin cDNA was prepared from RNA isolated from PtK2 cell culture, using a mAb against chicken occludin, whereas the others were amplified by polymerase chain reaction based on the sequence found around the human neuronal apoptosis inhibitory protein gene. The amino acid sequences of the three mammalian (human, murine, and canine) occludins were very closely related to each other (approximately 90% identity), whereas they diverged considerably from those of chicken and rat-kangaroo (approximately 50% identity). Implications of these data and novel experimental options in cell biological research are discussed.
Tripod fall: Concept and experiments of a novel approach to humanoid robot fall damage reduction (2014)

This paper addresses a new control strategy to reduce the damage to a humanoid robot during a fall. Instead of following the traditional approach of finding a favorable configuration with which to fall to the ground, this method attempts to stop the robot from falling all the way to the ground. This prevents the full transfer of the robot's potential energy to kinetic energy, and consequently results in a milder impact. The controlled motion of the falling robot involves a sequence of three deliberate contacts to the ground with the swing foot and two hands, in that order. In the final configuration the robot's center of mass (CoM) remains relatively high from the floor and the robot has a relatively stable three-point contact with the ground; hence the name tripod fall. The optimal location of the three contacts are learned through reinforcement learning algorithm. The controller is simulated on a full size humanoid, and experimentally tested on the NAO humanoid robot. In this work we apply our fall controller only to a forward fall.
A plane-wave-transformer photoelectron linac (2002)

We develop a novel photoelectron linear accelerator using a plane wave transformer (PWT) design. In this design, the input RF power is coupled to the accelerating cavities via a large concentric manifold cavity. The scheme makes possible very strong coupling between the accelerating cells, and relaxes manufacturing tolerances. The compact photoelectron linac integrates a photocathode directly into a PWT linac structure, and eliminates the drift space between a photoinjector and the linac which would otherwise lengthen the electron bunches. Using an emittance compensation scheme, the PWT photoelectron linac produces a high-brightness beam. We have demonstrated by simulations the feasibility of a 20 MeV PWT photoelectron linac design with a set of eleven iris-loaded disks suspended and cooled by four water tubes inside a large cylindrical tank.
Quantitative passive soil vapor sampling for VOCs- part 1: theory (2014)

Volatile organic compounds are the primary chemicals of concern at many contaminated sites and soil vapor sampling and analysis is a valuable tool for assessing the nature and extent of contamination. Soil gas samples are typically collected by applying vacuum to a probe in order to collect a whole-gas sample, or by drawing gas through a tube filled with an adsorbent (active sampling). There are challenges associated with flow and vacuum levels in low permeability materials, and leak prevention and detection during active sample collection can be cumbersome. Passive sampling has been available as an alternative to conventional gas sample collection for decades, but quantitative relationships between the mass of chemicals sorbed, the soil vapor concentrations, and the sampling time have not been established. This paper presents transient and steady-state mathematical models of radial vapor diffusion to a drilled hole and considerations for passive sampler sensitivity and practical sampling durations. The results indicate that uptake rates in the range of 0.1 to 1 mL min(-1) will minimize the starvation effect for most soil moisture conditions and provide adequate sensitivity for human health risk assessment with a practical sampling duration. This new knowledge provides a basis for improved passive soil vapour sampler design.
Direct Diode Pumped Kerr Lens Modelocked Ti:Sapphire Laser Oscillator (2012)

We describe a Ti:sapphire laser pumped directly with 445nm laser diodes. With 44 mW average power at 800 nm and bandwidth for <50 fs pulses, Kerr-lens-modelocked pulses are available with dramatically decreased pump cost.