gebhart/patrepeval huggingface dataset:
Theory of inert gas-condensing vapor thermoacoustics: Transport equations (2002)

The preceding paper [J. Acoust. Soc. Am. 112, 1414-1422 (2002)] derives the propagation equation for sound in an inert gas-condensing vapor mixture in a wet-walled pore with an imposed temperature gradient. In this paper the mass, enthalpy, heat, and work transport equations necessary to describe the steady-state operation of a wet-walled thermoacoustic refrigerator are derived and presented in a form suitable for numerical evaluation. The requirement that the refrigerator operate in the steady state imposes zero mass flux for each species through a cross section. This in turn leads to the evaluation of the mass flux of vapor in the system. The vapor transport and heat transport are shown to work in parallel to produce additional cooling power in the wet refrigerator. An idealized calculation of the coefficient of performance (COP) of a wet-walled thermoacoustic refrigerator is derived and evaluated for a refrigeration system. The results of this calculation indicate that the wet-walled system can improve the performance of thermoacoustic refrigerators. Several experimental and practical questions and problems that must be addressed before a practical device can be designed and tested are described.
A cluster centroid method for room response equalization at multiple locations (2002)

We address the problem of simultaneous room response equalization for multiple listeners. Traditional approaches to this problem have used a single microphone at the listening position to measure impulse responses from a loudspeaker and then use an inverse filter to correct the frequency response. The problem with that approach is that it only works well for that one point and in most cases is not practical even for one listener with a typical ear spacing of 18 cm. It does not work at all for other listeners in the room, or if the listener changes positions even slightly. We propose a new approach that is based on the fuzzy c-means clustering technique. We use this method to design equalization filters and demonstrate that we can achieve better equalization performance for several locations in the room simultaneously as compared to single point or simple averaging methods.
Kino-Dynamic, Harmonic, Potential-based Motion Planning (2006)

This paper extends the capabilities of the harmonic potential field (HPF) approach to planning to cover both the kinematic and dynamic aspects of a robot's motion. The suggested approach converts the gradient guidance field from a harmonic potential to a control signal by augmenting it with a novel type of dampening forces suggested in this paper called: nonlinear, anisotropic, dampening forces (NADFs). The combination of the two provides a signal that can both guide a robot and effectively manage its dynamics. The kinodynamic planning signal inherits, fully, the guidance capabilities of the harmonic gradient field. It can also be easily configured to efficiently suppress the inertia-induced transients in the robot's trajectory without compromising the speed of operation. Theoretical developments and simulation results are provided in the paper
Chiral Nematic Stained Glass: Controlling the Optical Properties of Nanocrystalline Cellulose-Templated Materials (2012)

Chiral nematic mesoporous materials decorated with metal nanoparticles have been prepared using the templated self-assembly of nanocrystalline cellulose (NCC). By adding small quantities of ionic compounds to aqueous dispersions of NCC and tetramethoxysilane (TMOS), the helical pitch of the chiral nematic structure could be manipulated in a manner complementary to the ratio of NCC/TMOS previously demonstrated by our group. We have studied the transformation of these ion-loaded composites into high surface area mesoporous silica and carbon films decorated with metal nanoparticles through calcination and carbonization, respectively. This general and straightforward approach to prepare chiral nematic metal nanoparticle assemblies may be useful in a variety of applications, particularly for their chiral optical properties.
Study of low-temperature crystallization of amorphous Si films obtained using ferritin with Ni nanoparticles (2005)

A polycrystalline silicon thin film with a high crystallinity was obtained using ferritin with a Ni core (7nm), which enabled us to precisely control the density and position of the nucleus for crystal growth. The core density of ferritin adsorbed on the amorphous silicon surface was controlled in the range from 109cm−2to1011cm−2. Crystal growth was performed at 550°C in N2. Crystallinity or grain size strongly depended on Ni core density. Polycrystalline silicon film with the average grain size of 3μm and a high crystallinity was obtained at a low Ni atom density of 1012cm−2.
Virtual Memory Support for Multiple Pages (1993)

The advent of computers with 64-bit virtual address spaces and giga-bytes of physical memory will provide applications with many more orders of magnitude of memory than is possible today. However, to tap the potential of this new hardware, we need to re-examine how virtual memory is traditionally managed. We concentrate in this note on two aspects of virtual memory: software support for multiple page sizes, and memory management policies tuned to large amounts of physical memory. We argue for the need to examine these areas, and we identify several questions that need to be answered. In particular, we show that providing support for multiple page sizes is not as straightforward as may initially appear.
Incorporation of radioiodotyrosines into proteins formed during cell-free translation. [/sup 125/I, rat liver] (1978)

Radioiodination of transfer RNAs isolated from rat liver by a procedure chosen to preserve acylated amino acids resulted in the addition of iodine to bound tyrosine. The iodinated aminoacylated tRNA/sup Tyr/ was 10-fold purified from the total tRNA by rapid chromatography on benzoylated DEAE-cellulose. Nearly 90% of the isotope associated with the partially purified fraction was shown to occur in acylated monoiodotyrosine and diiodotyrosine, in approximately equal isotopic proportion. When the /sup 125/I-labeled aminoacyl-tRNAs were added to a rabbit reticulocyte lysate, iodotyrosines were incorporated into protein. Unlabeled aminoacylated liver tRNA reduced the incorporation of iodinated tyrosines as did purified, aminoacylated Escherichia coli tRNA/sup Tyr/. In a lysate coded by rat pituitary RNA the isotope was in part incorporated into a protein which was identical with rat prolactin or its prohormone, as determined by immunoprecipitation and electrophoresis. Following proteolytic digestion of the immunoprecipitate, 95% of the isotope was recovered in monoiodotyrosine and diiodotyrosine. The proportion of iodinated tyrosines incorporated into prolactin in the cell-free translation mixtures was increased 668-fold by pretreatment of the lysate with micrococcal nuclease.
Fluorescence and Aflatoxin Content of Individual Almond Kernels Naturally Contaminated with Aflatoxin (1984)

ABSTRACT An effort was made to relate the aflatoxin content of individual almond kernels to their fluorescent color. The fluorescence of individual blanched almonds and defective almonds, most of which lack an intact pellicle, was described by means of Methuen color charts before each kernel was analyzed for aflatoxin. Almonds that fluoresced violet‐purple under long‐wave UV light were found to contain high levels of aflatoxins B 1 and B 2 but, with perhaps one exception, no measurable amounts of aflatoxins G 1 and G 2 . Some diced almonds with blue fluorescence had all four aflatoxins present but at much lower levels than in the violet‐purple kernels. Aflatoxin ranged from 1.0 × 10 5 to 2.5 × 10 6 ppb in the violet‐purple kernels. These values agree with previous estimates of aflatoxin concentration per contaminated nut. Almond kernels with violet‐purple fluorescence should be culled.
Transgenic Evaluation of Activated Mutant Alleles of SOS2 Reveals a Critical Requirement for Its Kinase Activity and C-Terminal Regulatory Domain for Salt Tolerance in <i>Arabidopsis thaliana</i> (2004)

In Arabidopsis thaliana, the calcium binding protein Salt Overly Sensitive3 (SOS3) interacts with and activates the protein kinase SOS2, which in turn activates the plasma membrane Na(+)/H(+) antiporter SOS1 to bring about sodium ion homeostasis and salt tolerance. Constitutively active alleles of SOS2 can be constructed in vitro by changing Thr(168) to Asp in the activation loop of the kinase catalytic domain and/or by removing the autoinhibitory FISL motif from the C-terminal regulatory domain. We expressed various activated forms of SOS2 in Saccharomyces cerevisiae (yeast) and in A. thaliana and evaluated the salt tolerance of the transgenic organisms. Experiments in which the activated SOS2 alleles were coexpressed with SOS1 in S. cerevisiae showed that the kinase activity of SOS2 is partially sufficient for SOS1 activation in vivo, and higher kinase activity leads to greater SOS1 activation. Coexpression of SOS3 with SOS2 forms that retained the FISL motif resulted in more dramatic increases in salt tolerance. In planta assays showed that the Thr(168)-to-Asp-activated mutant SOS2 partially rescued the salt hypersensitivity in sos2 and sos3 mutant plants. By contrast, SOS2 lacking only the FISL domain suppressed the sos2 but not the sos3 mutation, whereas truncated forms in which the C terminus had been removed could not restore the growth of either sos2 or sos3 plants. Expression of some of the activated SOS2 proteins in wild-type A. thaliana conferred increased salt tolerance. These studies demonstrate that the protein kinase activity of SOS2 is partially sufficient for activation of SOS1 and for salt tolerance in vivo and in planta and that the kinase activity of SOS2 is limiting for plant salt tolerance. The results also reveal an essential in planta role for the SOS2 C-terminal regulatory domain in salt tolerance.
Grid Monitoring for Distributed Power Generation Systems to Comply with Grid Codes (2006)

This paper investigates the possibility of using the phase-locked loop (PLL) algorithms for grid monitoring. The main interest is on the ability of the PLL to determine accurately other grid variables except the phase angle. The main focus is set on the voltage amplitude and frequency estimation but other attributes of the PLL systems such as the possibility to detect unbalance and to extract the positive and negative sequence from the grid voltages are also discussed. A detailed description of standards for wind turbine (WT) and photovoltaic (PV) systems regarding grid monitoring is given and the simulation results of the proposed PLL are compared with the values stated in these standards. Based on this comparison, it can be concluded that PLL system can be used with success for grid monitoring
Bio‐distribution and<i>in vivo</i>antioxidant effects of cerium oxide nanoparticles in mice (2011)

Cerium oxide nanoparticles have oxygen defects in their lattice structure that enables them to act as a regenerative free radical scavenger in a physiological environment. We performed a comprehensive in vivo analysis of the biological distribution and antioxidant capabilities of nanoceria administered to mice perorally (PO), intravenously (IV), or intraperitoneally (IP) by dosing animals weekly for 2 or 5 weeks with 0.5 mg kg(-1) nanoceria. Next, we examined if nanoceria administration would decrease ROS production in mice treated with carbon tetrachloride (CCl(4)). Our results showed that the most extensive and cumulative nano-deposition was via IV and IP administered while PO administration showed mice excreted greater than 95% of their nanoceria within 24 h. Organ deposition for IV and IP mice was greatest in the spleen followed by the liver, lungs, and kidneys. Elimination for all administration routes was through feces. Nanoceria administration showed no overt toxicity, however, WBC counts were elevated with IV and IP administration. Our in vivo studies show that nanoceria administration to mice with induced liver toxicity (by CCl(4)) showed similar findings to mice treated with N-acetyl cystine (NAC), a common therapeutic to reduce oxidative stress. Taken together, our studies show that nanoceria remains deposited in tissues and may decrease ROS, thereby suggesting that cerium oxide nanoparticles may be a useful antioxidant treatment for oxidative stress.
Preparation of hydridometallocarboranes and their use as homogeneous catalysts (1974)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of hydridometallocarboranes and their use as homogeneous catalystsTimm E. Paxson and M. Frederick HawthorneCite this: J. Am. Chem. Soc. 1974, 96, 14, 4674–4676Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://pubs.acs.org/doi/10.1021/ja00821a054https://doi.org/10.1021/ja00821a054research-articleACS PublicationsRequest reuse permissionsArticle Views195Altmetric-Citations80LEARN 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 Get e-Alerts
An Efficient Polarity Detection Technique for Thermoelectric Harvester in L-based Converters (2016)

This paper presents a new method for detecting and reversing the polarity of a low-voltage thermoelectric generator (TEG) in inductor-based converters. The proposed technique makes use of the inductor response to a voltage change due to the flip in the TEG polarity. The inductor voltage provides two distinguishable states which correspond to the normal and the reversed TEG polarity. A switch matrix circuit is then used to correct the polarity by physically reversing the TEG connection. The detection circuit along with the switch matrix provide a positive input voltage from the TEG to the inductorbased converter. The proposed technique is an efficient polarity detection with all-digital implementation, fully integrated, small area and power overhead. The prototype chip is fabricated in 65-nm CMOS and occupies an area of 0.09 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . Measurement results confirm a maximum efficiency of 70% at 50 mV TEG voltage and 40 μA output current. The proposed technique is part of an autonomous thermal energy harvesting system that detects and corrects the TEG polarity.
Horn-Reflector Antenna-Eliminating Weather-Cover Reflections (1980)

This paper discusses measurements of flat and focused weather covers made on a scale-model, horn-reflector antenna (scaling factor 7.5). A focused weather cover eliminates the reflection lobes produced from the flat weather cover currently installed on the horn-reflector antenna. These antennas have extensive use in the Bell System microwave common-carrier radio relay network.
Genetics of<i>Heliothis</i>and<i>Helicoverpa</i>resistance to chemical insecticides and to<i>Bacillus thuringiensis</i> (1997)

Genetic linkage maps of Heliothis virescens and Helicoverpa armigera are being used to identify and characterize resistance-conferring genes. The insensitive acetylcholinesterase conferring resistance to organophosphorus insecticides and the insensitive sodium channel conferring resistance to pyrethroids have both been mapped in H. virescens. The linkage mapping approach permits a genetic dissection of resistance, even when the mode of action and lethal target are not precisely known, such as for the insecticidal toxins from the bacterium Bacillus thuringiensis (Bt). We have identified and mapped a major Bt-resistance locus in a strain of H. virescens exhibiting up to 10000-fold resistance to Cry1Ac toxin and are currently developing a linkage map for H. armigera with a set of ‘anchor’ loci to facilitate comparison with H. virescens. Both species are currently experiencing their first significant selective pressure in the field by transgenic cotton expressing Cry1Ac, and timely identification of resistance mechanisms and their underlying genetic basis will be essential in successfully managing the Bt resistance that will eventually appear. ©1997 SCI
Teledrive: An Intelligent Telepresence Solution for “Collaborative Multi-presence” through a Telerobot (2022)

This paper presents an Edge-centric architecture along with a novel communication topology for a practical robotic telepresence solution. The system has been experimented in real-life. The subjective user experience is quantified through a simple yet effective technique. The efficacy of the protocol is also proven through experiments in practical deployment.
Pick-up horn for high power TVAC test of spacecraft payloads for communication satellites (2006)

This paper presents a novel method for high power thermal vacuum tests of spacecraft payloads using pick-up horns (PUH). The PUH method has benefits of being cost-effective, compact, easy to implement, does not require breaking the vacuum several times and avoids physical contact with flight hardware. It is designed with four oversized slots to receive the high RF power from the flight horns, absorb almost all the power and efficiently transfer the heat outside the TVAC chamber with minimal reflections back to the horn and minimal RF leakage outside the PUH. The PUH has been successfully used for high power TVAC testing and validation of a Ku-band payload for satellite communications
Grating coupler dispersion compensation with a surface-relief reflection grating (1994)

Experimental results are presented that show that diffraction off a surface-relief reflection grating can be used to extend the FWHM input coupling efficiency versus the coupled-light wavelength of a grating coupler from 0.7 to 17 nm. Use of a surface-relief reflection grating allows high diffraction efficiency over a wide wavelength range. Dispersion-matching calculations are included that illustrate that for certain output coupling applications the FWHM can be extended to 33 am. Analysis shows that for inputcoupling applications the lateral beam shift resulting from angular dispersion may be the limiting factor for wavelength compensation.
Enhancement of 1,25-dihydroxyvitamin D<sub>3</sub>-mediated suppression of experimental autoimmune encephalomyelitis by calcitonin (2009)

The active form of vitamin D, 1alpha,25-dihydroxyvitamin D(3) [1,25(OH)(2)D(3)], suppresses disease development in the experimental autoimmune encephalomyelitis (EAE) model of multiple sclerosis (MS). However, complete disease prevention only occurs with doses that dramatically elevate serum calcium levels, thus limiting the usefulness of 1,25(OH)(2)D(3) as a potential MS therapeutic agent. Because calcitonin (CT) is believed to be released by hypercalcemia and has been shown to be anti-inflammatory, we examined whether suppression of EAE by 1,25(OH)(2)D(3) could be mediated either in part or entirely by CT. Continuous administration of pharmacological doses of CT did not prevent EAE. However, a combination of CT and a subtherapeutic dose of 1,25(OH)(2)D(3) additively suppressed EAE without causing hypercalcemia. Moreover, CT decreased the dose of 1,25(OH)(2)D(3) required for disease suppression. Our results suggest that CT may be a significant factor but cannot account entirely for 1,25(OH)(2)D(3)-mediated suppression of EAE.
Improved Quantization and Transform Coefficient Coding for the Emerging Versatile Video Coding (VVC) Standard (2019)

One key component of all block-based hybrid video codecs is transform coding of prediction residues, which consists of an orthogonal block transform, scalar quantization of transform coefficients, and entropy coding of the resulting quantization indexes. For improving coding efficiency relative to the state-of-the-art video coding standard HEVC, we propose the following modifications: (1) Replacing scalar quantization with trellis-coded quantization; and (2) utilizing additional statistical dependencies between quantization indexes for entropy coding. The proposed approach was integrated into the first test model VTM-1 for the new standardization project Versatile Video Coding (VVC). Our coding experiments showed average bit-rate savings of 4.9 % for intra-only, 3.4 % for random access, and 2.8 % for low-delay configurations.
IN SITU TISSUE ENGINEERING OF THE TRACHEA (2002)

We have succeeded to reconstruct the trachea with mesh type prosthesis and its long term efficacy was demonstrated in dog model. In this study we improved the structure of the tracheal wall and its feasibility was examined. A framework (50mm in length) was made with polypropylene mesh and spiral 5tent. It was dipped in 1% collagen solution and dried. Then collagen layers were attached on both sides with a thickness of 3 mm. In this step, we have previously used 1% collagen but in the present study, we used 3% collagen. Heat treatment was done at 140 C 24 h. 16 beagle dogs were used. The prosthesis (3%-T) was implanted into a cervical tracheal 5-cm defect of 8 dogs. Before implantation collagen was soaked with bone marrow aspirate. As control, the conventional prosthesis of 1% collagen (l%-T). was implanted in 8 dogs. At the operation, the air leakage pressure were measured: 3%T was 25 cm H2O (l%T:15cm H20). All the 16 dogs survived uneventfully until sacrifice (1M –12M). Pathologically implanted collagens were replaced with the host tissue and epithelium was accomplished. Recovery of the tissue and epithelium was remarkably slower in 1%T. This experiment indicates that the improvement of collagen facilitates the tissue regeneration on thy tracheal wall.
Noncrystalline films with the chemistry, bonding, and properties of diamond (1993)

The energetic condensation of multiple charged ions of carbon at keV energies produces textured noncrystalline films having many of the properties of diamond. Prepared in vacuum by the laser ablation of graphite at intensities in excess of 1011 W cm−2, a variety of structural morphologies can result that depend upon the kinetic energies and charge states employed. The most promising is an amorphous ceramic called ‘‘amorphic diamond’’ for convenience. It consists of sp3-bonded nodules of carbon in a matrix of other carbons. The high energies of condensation provide both for the chemical bonding of such films to a wide variety of substrates and for low values of residual compressive stress, 0.7–0.8 GPa. On selected films, hardness cannot be measured because of deformations of the diamond indenter, but a lower limit for hardness has been found at 78 GPa. Coatings of 2–5 μm thicknesses have extended lifetimes of materials such as Si, Ti, and ZnS against the erosive wear from high-speed particles and droplets by factors of tens to thousands.