gebhart/patrepeval huggingface dataset:
Enzyme-Catalyzed Synthesis of Oligosaccharides That Contain Functionalized Sialic Acids (1997)

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTEnzyme-Catalyzed Synthesis of Oligosaccharides That Contain Functionalized Sialic AcidsMark D. Chappell and Randall L. HalcombView Author Information Department of Chemistry and Biochemistry University of Colorado Boulder, Colorado 80309-0215 Cite this: J. Am. Chem. Soc. 1997, 119, 14, 3393–3394Publication Date (Web):April 9, 1997Publication History Received12 November 1996Published online9 April 1997Published inissue 1 April 1997https://doi.org/10.1021/ja963894pCopyright © 1997 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views431Altmetric-Citations31LEARN 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 InReddit Read OnlinePDF (155 KB) Get e-AlertsSupporting Info (1)»Supporting Information Supporting Information SUBJECTS:Chemical synthesis,Oligosaccharides,Peptides and proteins,Post-translational modification,Reaction products Get e-Alerts
Performance of coded higher order modulation and hybrid ARQ for next generation cellular CDMA systems (2002)

A key requirement for next generation CDMA systems is to provide a high bit rate packet data service and improved sector throughput for both low and high mobility applications. A 1.25 MHz DS-CDMA evolution called 1XTREME (Third Generation Enhanced Modulation and Encoding) has been proposed. 1XTREME uses a forward shared channel (F-SHCH) that is shared by multiple packet data users and is capable of supporting peak rates of up to 5 Mbps, compared to third generation CDMA system indoor peak data rates of 460 kbps and 2 Mbps for IS-2000 and W-CDMA, respectively. In this paper the link performance of the F-SHCH is evaluated for different modulation and coding scheme (MCS) configurations. Based on the link results, the average sector throughput is presented for two simple scheduling algorithms, as well as performance as a function of the maximum allowed FER operating point.
Fast Pockels light modulator using guided wave resonance (1985)

A new type of optical modulator is proposed in which a guided wave is resonantly excited by a grating coupler. The guiding layer is made of electrooptic (EO) material. The excitation of the resonance is controlled by a modulation voltage across the EO layer. This device acts either as a bulk EO modulator or an EO waveguide modulator.
Changes in the Parameters of the Electromagnetic Response of Model Dielectric Samples with Air Cavity Defects under External Deterministic Acoustic Impact (2021)

The paper discusses the possibility of testing the air inclusions saturation in cement-sand samples using the acoustic-electrical transformations phenomenon in heterogeneous dielectric materials. An experiment technique is presented including contact external acoustic excitation and contactless registration of the electromagnetic response to such an impact. Methods of samples deterministic acoustic excitation by a ball impact and the experimental determination of the impact energy are described. The model samples size and composition are described, including air cavities in a polyethylene sheath. The experimental studies geometry is shown, indicating the direction of the samples acoustic excitation and the location of the electromagnetic receiving plates. It is shown that the defect-free samples and with air cavities, have different amplitude and frequency of the electromagnetic signals spectral components. The samples with air cavities have the average weight of the EMS spectrum changes towards lower frequencies. This frequency shift effectively reflects the concentration of air cavities defects in a cement-sand samples and this effect can be used when testing concrete products for the presence of air inclusions, and, accordingly, will allow determining the frost resistance of products.
Evolution of thyroid hormone binding by transthyretins in birds and mammals (1999)

Transthyretin, a protein synthesized and secreted by the choroid plexus and liver, binds thyroid hormones in extracellular compartments. This binding prevents accumulation of thyroid hormones in the lipids of membranes, establishing extracellular thyroid hormone pools for the distribution of the hormones throughout the body and brain. The N-termini of the transthyretin subunits are longer and more hydrophobic in chicken than in eutherian transthyretins. Here, we show that this is a general structural feature of avian transthyretins. Systematic changes of protein structure during evolution result from selection pressure leading to changes in function. The evolution of transthyretin function, namely, the binding of thyroid hormones, was studied in nine vertebrate species. The affinity of thyroxine binding to transthyretin is lowest in avians (mean Kd of about 30 nm), intermediate in metatherians (mean Kd of about 17 nm) and highest in eutherians (mean Kd of about 11 nm). The affinity for 3,5,3'-triiodothyronine shows an opposite trend, being four times higher for avian transthyretins than for mammalian transthyretins.
VoizLock - Human Voice Authentication System using Hidden Markov Model (2008)

Speaker authentication is the process of automatically recognizing who is speaking on the basis of individual information included in speech waves. Many principles are used in the area of voice recognition. This paper provides a method of storing the voiceprints of individuals uniquely, based on the Hidden Markov Model. HMM has been used in the speech recognition area for a long period of time, but VoizLock project explores a way of using HMM for voice authentication which is different from speech recognition. This voiceprint will then be used for voice authentication, using text-independent speaker recognition methods in which the system does not rely on a specific text being spoken, but solely on the voice of the speaker. This paper also provides details about certain misconceptions with regard to voice authentication that exist in the society. This paper explains more about the user training phase detailing how the voice print of an individual is stored in the system by extracting certain values of the waveform using HMM. Apart from the training phase this analyses the results obtained from the testing done covering different scenarios pertaining to voice authentication.
Sensitive White Space Detection with Spectral Covariance Sensing (2010)

This paper proposes a novel, highly effective spectrum sensing algorithm for cognitive radio and white space applications. The proposed spectral covariance sensing (SCS) algorithm exploits the different statistical correlations of the received signal and noise in the frequency domain. Test statistics are computed from the covariance matrix of a partial spectrogram and compared with a decision threshold to determine whether a primary signal or arbitrary type is present or not. This detector is analyzed theoretically and verified through realistic open-source simulations using actual digital television signals captured in the US. Compared to the state of the art in the literature, SCS improves sensitivity by 3 dB for the same dwell time, which is a very significant improvement for this application. Further, it is shown that SCS is highly robust to noise uncertainty, whereas many other spectrum sensors are not.
STUDIES ON THE POSTERIOR SILK GLAND OF THE SILKWORM <i>BOMBIX MORI </i> (1970)

Ultracentrifugal analyses of the native silk proteins extracted from the various parts of the middle silk gland of the mature silkworm have revealed that there exist four components with S degrees (20,w) values of 10S, 9-10S, 9S, and 4S in the extract. It is suggested that the fastest 10S component is the native fibroin synthesized in the posterior silk gland and transferred to the middle silk gland to be stored there, while the slower three components probably correspond to inner, middle, and outer sericins which were synthesized in the posterior, middle, and anterior portion of the middle silk gland, respectively. Native fibroin solution was prepared from the most posterior part of the middle silk gland. Ultracentrifugal analyses have shown that the solution contains considerable amounts of aggregates in addition to the main 10S component. Treatment with lithium bromide (LiBr), urea, or guanidine hydrochloride solution up to 6 M all have failed to dissociate the 10S component. From the sedimentation equilibrium analyses and partial specific volume of 0.71(6), the molecular weight of the 10S component of the native fibroin solution was found to be between 3.2 - 4.2 x 10(5), with a tendency to lie fairly close to 3.7 x 10(5).
Lift enhancement of an airfoil using a Gurney flap and vortex generators (1993)

Experimental measurements of surface pressure distributions and wake profiles were obtained for an NACA 4412 airfoil to determine the lift, drag, and pitching-moment coefficients for various configurations.The addition of a Gurney flap increased the maximum lift coefficient from 1.49 up to 1.96, and decreased the drag near the maximum lift condition.There was, however, a drag increment at low-to-moderate lift coefficients.Additional nose-down pitching moment was also generated by increasing the Gurney flap height.Good correlation was observed between the experiment and Navier-Stokes computations of the airfoil with a Gurney flap.Two deploy able configurations were also tested with the hinge line forward of the trailing edge by one and 1.5 flap heights, respectively.These configurations provided performance comparable to that of the Gurney flap.The application of vortex generators to the baseline airfoil delayed boundary-layer separation and yielded an increase in the maximum lift coefficient of 0.34.In addition, there was a significant drag penalty associated with the vortex generators, which suggests that they should be placed where they will be concealed during cruise.The two devices were also shown to work well in concert.
ERP, a new member of the ets transcription factor/oncoprotein family: cloning, characterization, and differential expression during B-lymphocyte development. (1994)

The ets gene family encodes a group of proteins which function as transcription factors under physiological conditions and, if aberrantly expressed, can cause cellular transformation. We have recently identified two regulatory elements in the murine immunoglobulin heavy-chain (IgH) enhancer, pi and microB, which exhibit striking similarity to binding sites for ets-related proteins. To identify ets-related transcriptional regulators expressed in pre-B lymphocytes that may interact with either the pi or the microB site, we have used a PCR approach with degenerate oligonucleotides encoding conserved sequences in all members of the ets family. We have cloned the gene for a new ets-related transcription factor, ERP (ets-related protein), from the murine pre-B cell line BASC 6C2 and from mouse lung tissue. The ERP protein contains a region of high homology with the ETS DNA-binding domain common to all members of the ets transcription factor/oncoprotein family. Three additional smaller regions show homology to the ELK-1 and SAP-1 genes, a subgroup of the ets gene family that interacts with the serum response factor. Full-length ERP expresses only negligible DNA-binding activity by itself. Removal of the carboxy terminus enables ERP to interact with a variety of ets-binding sites including the E74 site, the IgH enhancer pi site, and the lck promoter ets site, suggesting a carboxy-terminal negative regulatory domain. At least three ERP-related transcripts are expressed in a variety of tissues. However, within the B-cell lineage, ERP is highly expressed primarily at early stages of B-lymphocyte development, and expression declines drastically upon B-cell maturation, correlating with the enhancer activity of the IgH pi site. These data suggest that ERP might play a role in B-cell development and in IgH gene regulation.
Reviews (1970)

Journal Article Reviews Get access A CONCORDANCE TO BEO WULF , edited by J. B. Bessenger , , programmed by Philip H. Smith , Ithaca , New York , Cornell University Press , 1969 ; pp. xxxiv, 373 ; £4 10s A CONCORDANCE TO BEOWULF , com piled by Albert S. Cook . Halle : Max Niemeyer , 1911 ; pp. iv, 436 ; reprinted by Gale Research Company , Detroit , 1968 ; $12.50 ALISTAIR CAMPBELL ALISTAIR CAMPBELL Search for other works by this author on: Oxford Academic Google Scholar Notes and Queries, Volume 17, Issue 3, March 1970, Pages 116–117, https://doi.org/10.1093/nq/17-3-116 Published: 01 March 1970
Characterization of ultrasound contrast microbubbles using<i>in vitro</i>experiments and viscous and viscoelastic interface models for encapsulation (2005)

Zero-thickness interface models are developed to describe the encapsulation of microbubble contrast agents. Two different rheological models of the interface, Newtonian (viscous) and viscoelastic, with rheological parameters such as surface tension, surface dilatational viscosity, and surface dilatational elasticity are presented to characterize the encapsulation. The models are applied to characterize a widely used microbubble based ultrasound contrast agent. Attenuation of ultrasound passing through a solution of contrast agent is measured. The model parameters for the contrast agent are determined by matching the linearized model dynamics with measured attenuation data. The models are investigated for its ability to match with other experiments. Specifically, model predictions are compared with scattered fundamental and subharmonic responses. Experiments and model prediction results are discussed along with those obtained using an existing model [Church, J. Acoust. Soc. Am. 97, 1510 (1995) and Hoff et al., J. Acoust. Soc. Am. 107, 2272 (2000)] of contrast agents.
Introduction. (1986)

In the introduction to this special issue on temporary worker programs, the author defines the term temporary worker and reviews worldwide research, writings, and policies to date pertaining to temporary workers. Labor market and economic effects, socio-administrative conditions, and effects on the labor-sending societies are discussed. Noting that mutually exclusive arguments are presented within one issue of the journal, the author introduces the authors of the individual articles and their subjects. It is determined that the temporary worker phenomenon is now global and that having an understanding of these workers is increasingly central to understanding key socioeconomic and political processes affecting modern industrial and nonindustrial societies.
Dialogue machine translation system using multiple translation processors (2002)

In natural dialogues, speakers may make some kinds of mistakes or so called irregular expressions. One of the most difficult problems which Dialogue Machine Translations must deal with is translating irregular expressions in the natural conversation, such as ungrammatical, incompleted, or ill-formed sentences. However most existing machine translation systems reject utterances including irregular expressions. The author proposes a multiple translation processors (MPT) approach for dialogue machine translation. In the MTP, several different types of translation processors are used in original language analysis and target language generation processing simultaneously: (I) Robust Parser based Translation Processor, (II) Example Based Translation Processor, (III) Family Modal based Translation Processor, and (IV) Super Function based Translation Processor. The Robust Parser based Translation Processor consists of the following three analysis models: (1) all information analysis model, (2) syntactic constraint analysis model, (3) semantic constraint analysis model. A prototype MTP system based on the proposed method has been built. Experimental results show that the proposed method is effective for the implementation of robust dialogue translation and the development of a practical dialogue machine translation system.
Correction of electrode modelling errors in multi-frequency EIT imaging (2016)

The differentiation of haemorrhagic from ischaemic stroke using electrical impedance tomography (EIT) requires measurements at multiple frequencies, since the general lack of healthy measurements on the same patient excludes time-difference imaging methods. It has previously been shown that the inaccurate modelling of electrodes constitutes one of the largest sources of image artefacts in non-linear multi-frequency EIT applications. To address this issue, we augmented the conductivity Jacobian matrix with a Jacobian matrix with respect to electrode movement. Using this new algorithm, simulated ischaemic and haemorrhagic strokes in a realistic head model were reconstructed for varying degrees of electrode position errors. The simultaneous recovery of conductivity spectra and electrode positions removed most artefacts caused by inaccurately modelled electrodes. Reconstructions were stable for electrode position errors of up to 1.5 mm standard deviation along both surface dimensions. We conclude that this method can be used for electrode model correction in multi-frequency EIT.
Efficient Reduction of Fringe Noise in Trace Gas Detection with Diode Laser Multipass Absorption Spectroscopy (2000)

The combination of a diode laser source and a multipass cell is attractive for the detection of trace gases. The sensitivity achievable with this system, however, is often limited by etalon fringes arising from path length difference among the optical components. In this paper, we describe a sensitive detection method that minimizes the effect of the fringes. In accordance with the expected widths of the 2 f (second-harmonic of the modulation frequency) absorption signals of the target molecule, the base length of a multipass cell is chosen so that the free spectral range of the fringes becomes much narrower than the signal widths. Then, the 2 f signal is subjected to multistage smoothing to remove the fringe noise by exploiting its periodicity. As a demonstration of this method, trace moisture in nitrogen is detected using a near-infrared, distributed-feedback diode laser and a multipass cell of 20 m absorption length. The detection limit of the system is found to be about 2.3 ppb, two orders of magnitude better than the limit before fringe elimination.
Merging BSP trees yields polyhedral set operations (1990)

BSP trees have been shown to provide an effective representation of polyhedra through the use of spatial subdivision, and are an alternative to the topologically based b-reps. While bsp tree algorithms are known for a number of important operations, such as rendering, no previous work on bsp trees has provided the capability of performing boolean set operations between two objects represented by bsp trees, i.e. there has been no closed boolean algebra when using bsp trees. This paper presents the algorithms required to perform such operations. In doing so, a distinction is made between the semantics of polyhedra and the more fundamental mechanism of spatial partitioning. Given a partitioning of a space, a particular semantics is induced on the space by associating attributes required by the desired semantics with the cells of the partitioning. So, for example, polyhedra are obtained simply by associating a boolean attribute with each cell. Set operations on polyhedra are then constructed on top of the operation of merging spatial partitionings. We present then the algorithm for merging two bsp trees independent of any attributes/semantics, and then follow this by the additional algorithmic considerations needed to provide set operations on polyhedra. The result is a simple and numerically robust algorithm for set operations.
OXIDATIVE REMOVAL OF <i>N</i>-(<i>p</i>-METHOXYBENZYL) GROUP ON DIKETOPIPERAZINE SKELETON WITH CERIC AMMONIUM NITRATE (1983)

Abstract N-(p-Methoxybenzyl) groups in some diketopiperazine derivatives were proved to be readily and efficiently removed with ceric ammonium nitrate in acetonitrile-water under mild conditions, where N-benzyl , methoxyl in the aminal structure, and isolated vinyl groups remained unchanged.
Insurance Based on Temperature protection against citrus losses from frost damage involves solution of difficult actuarial problems (1954)

California Agriculture - All Issues
Selective Detection of Live Pathogens via Surface-Confined Electric Field Perturbation on Interdigitated Silicon Transducers (2009)

Detection of physical changes of cells is emerging as a new diagnostic approach to determine their phenotypical features. One of such changes is related to their viability; live (viable) cells are more voluminous than the dead ones, and monitoring this parameter in tissue cells becomes essential in fields such as drug discovery and hazard evaluation. In the area of pathogen detection, an analytical system capable of specifically detecting viable cells with the simple sample preparation and detection process would be highly desirable since live microorganisms can rapidly increase their numbers even at extremely low concentration and become a severe health risk. However, current sensing strategies cannot clearly determine the viability of cells, and hence they are susceptible to false-positive signals from harmless dead pathogens. Here we developed a robust electronic immunoassay that uses a pair of polycrystalline silicon interdigitated electrodes for the rapid detection of pathogens with high specificity for live cells. After bacterial cells were specifically anchored to the surface of the antibody-modified electrode, the characteristic geometry of the transducer enables the selective detection of viable cells with a limit of detection of 3 x 10(2) cfu/mL and an incubation time of only 1 h. The CMOS compatible fabrication process of the chip along with the label-free, reagent-less electronic detection and the easy electrode regeneration to recycle for another impedance measurement make this approach an excellent candidate for oncoming economical in-field viable-cell detection systems, fully integrable with sophisticated signal processing circuits.
History, present status, and future directions of HF surface-wave radars in the U.S (2004)

HF surface-wave radars (HFSWRs) offer two distinct advantages when used over the sea: with vertical polarization, they see beyond the horizon, and the interaction of their signals with ocean waves is simple and well understood. As a result, many HFSWR research test programs were conducted in the U.S., beginning 35 years ago. This author was fortunate to have been immersed in these programs from the beginning. Early projects by the Defense Department focused on military target surveillance: ships, aircraft, and missiles. In the mid-70s, their potential was explored for environmental measurements: surface currents and sea state. Why after 35 years of testing and evaluation are none found in operational service today, except those made by CODAR for environmental monitoring? I discuss this question in the present paper.
The Safety of Perioperative Esmolol (2010)

This review suggests that titration of esmolol to a hemodynamic end point can be safe and effective. Safety data from studies in higher-risk patients are needed to establish a perioperative safety and efficacy profile of esmolol.