gebhart/patrepeval huggingface dataset:
Natural neighbors interpolation method for correcting IDW (2009)

Digital Elevation Model (DEM) interpolation is one of basic functions for spatial description and spatial analysis in GIS and related spatial information fields. Interpolation can be viewed as a function for estimating the heights of unknown points using a set of proper known data. It is a key problem of DEM. Inverse distance weighting (IDW) interpolation is the most commonly used in DEM. The reference points selected by IDW might not be well distributed in space. This leads to the discontinuity problem of interpolated DEM surface and some artifacts might be generated. In order to solve the problem caused by ill-distribution of the number and position of reference points in searching process, this paper put forward a new surface interpolation model about first-order natural neighbor interpolation. The use of first-order natural neighbor interpolation based on TIN can adapt well to poor data distributions because inserting into a point generates a well-defined set of neighbors. In the fitting process, according to range of influence composed by first-order natural neighbor points and the triangle area as weight base of the known point, a non-linear fitting equation can be constructed. Comparative experiments show that this method has higher precision and more practical application value.
Curves and surfaces with applications in CAGD (1997)

Carefully refereed and edited papers on the most current developments in the theory and applications of curves and surfaces. This volume, with its companion volume, contains a selection of papers presented at the Third International Conference on Curves and Surfaces which was held in June 1996 at Chamonix, France. Each book contains several invited survey lectures prepared by leading experts in the fields of approximation theory, computer- aided geometric design, numerical analysis, and wavelets. In addition, each book includes a number of closely related full-length research papers which have been refereed and meticulously edited. These books should be of great interest to mathematicians, engineers, and computer scientists working in the field of Approximation Theory, Computer-Aided Geometric Design (CAGD), Computer Graphics, Numerical Analysis, CAD/CAM, and application areas.
Moving Schemes for Mobile Sinks in Wireless Sensor Networks (2007)

In a wireless sensor network for data-gathering applications, if all network data congregate to a stationary sink node hop by hop, the sensor nodes near the sink have to consume more energy on forwarding data for other nodes, which probably causes the early function loss of the sensor network. Employing a mobile sink can alleviate the hotspot problem and balance the energy consumption among the sensor nodes. In this paper, we propose two autonomous moving schemes for the mobile sink. In our schemes, the sink makes moving decisions without complete knowledge of network topology and the energy distribution of all sensor nodes. We evaluated the performance of our moving schemes by simulation and the results show that both the two schemes can extend the network lifetime prominently.
The Phosphoglycerate Mutases (1989)

The phosphoglycerate mutase family is generally very well documented with respect to structure, evolution, and mode of action. However, a few individuals in the family remain relatively poorly characterized and will clearly require more detailed study. Furthermore, certain aspects of the detailed behavior of these enzymes are, as yet, incompletely understood and require further investigation. Cofactor-dependent monophosphoglycerate mutase and bisphosphoglycerate mutase are undoubtedly very closely related. Their amino acid sequences are strongly similar, they can form active heterodimers, and they catalyze the same three reactions, albeit at substantially different relative rates. Both enzymes catalyze a ping-pong type of reaction with a phosphohistidine intermediate. The presence of an additional phospho ligand at the active site of monophosphoglycerate mutase helps to explain why this enzyme is better at retaining the 2,3-bisphosphoglycerate intermediate and why it is thus more efficient (by a factor of about 10(3)) at catalyzing the interconversion of 3- and 2-phosphoglycerates. The reason why 1,3-bisphosphoglycerate is a better substrate for bisphosphoglycerate mutase than for monophosphoglycerate mutase (by a factor of about 30) is not yet apparent but presumably relates to the relative positioning of the two phospho-binding sites. Both enzymes are equally good as phosphatases when the reaction is activated by 2-phosphoglycollate. Available evidence indicates that these mutases are similar in many respects to the much smaller, cofactor-dependent monophosphoglycerate mutase from Schizosaccharomyces pombe, but further information is required to define the relationship more precisely. Cofactor-independent monophosphoglycerate mutase belongs to a quite distinct branch of the phosphoglycerate mutase family. It is not known at present whether this branch is related divergently or convergently to the cofactor-dependent monophosphoglycerate mutase/bisphosphoglycerate mutase branch. Existing evidence can be argued both ways. For example, the kinetic evidence shows a ping-pong type of reaction and would be consistent with a phosphohistidine intermediate as encountered in the other mutases. Thus the cofactor-independent enzyme may also have arisen by gene duplication--but, in this case, yielding an enzyme of about twice the size, with slightly different residues at the active site and C-terminal tail. An alternative possibility, of course, is that the two branches of the phosphoglycerate mutase family are quite unrelated in a divergent sense and are little more similar structurally than is, for example, the catalytically similar enzyme phosphoglucomutase.(ABSTRACT TRUNCATED AT 400 WORDS)
Altered responsiveness of rat liver epithelial cells to transforming growth factor beta 1 following their transformation with v-raf. (1990)

The effects of transforming growth factor beta (type 1) (TGF-beta 1) on DNA synthesis, cell proliferation, and protein synthesis were examined in a series of v-raf-transformed rat liver epithelial (RLE) cells, which exhibit a range of transformed phenotypes. All of the transformed cells were relatively resistant to the growth-inhibitory effects of TGF-beta 1, compared to normal RLE cells and control cells infected with a helper virus. The more tumorigenic cell lines had very few surface receptors for TGF-beta 1 and showed no increase in the secretion of a number of specific proteins, including fibronectin, following TGF-beta 1 treatment. In contrast, the more normal-looking, less tumorigenic v-raf-transformed cells bound similar amounts of TGF-beta 1 as normal RLE and control cells and showed a similar pattern of TGF-beta 1-stimulated protein secretion. These findings suggest that the effects of TGF-beta 1 on cell proliferation and on the expression of certain secreted proteins are mediated through different mechanisms. Following transformation of RLE cells with v-raf, the signalling pathways controlling TGF-beta 1 growth inhibition are perturbed, while those involved in regulating the synthesis of certain proteins may remain intact. Thus, the escape from the various distinct biological effects of TGF-beta 1 may be an important stage in the progression of neoplastic transformation of RLE cells in vitro.
Parallel meta-blocking: Realizing scalable entity resolution over large, heterogeneous data (2015)

Entity resolution constitutes a crucial task for many applications, but has an inherently quadratic complexity. Typically, it scales to large volumes of data through blocking: similar entities are clustered into blocks so that it suffices to perform comparisons only within each block. Meta-blocking further increases efficiency by cleaning the overlapping blocks from unnecessary comparisons. However, even Meta-blocking can be time-consuming: applying it to blocks with 7.4 million entities and 2.21011 comparisons takes almost 8 days on a modern high-end server. In this paper, we parallelize Meta-blocking based on MapReduce. We propose a simple strategy that explicitly creates the core concept of Meta-blocking, the blocking graph. We then describe an advanced strategy that creates the blocking graph implicitly, reducing the overhead of data exchange. We also introduce a load balancing algorithm that distributes the computationally intensive workload evenly among the available compute nodes. Our experimental analysis verifies the superiority of our advanced strategy and demonstrates an almost linear speedup for all meta-blocking techniques with respect to the number of available nodes.
[A case of posttraumatic delayed cerebral arterial spasm; case report and review of the literature on the pathogenesis]. (1992)

A case of posttraumatic delayed cerebral arterial spasm is presented. A 71-year-old man was admitted to our hospital with head injury. Neurological examination on admission only revealed consciousness disturbance (Japan Coma Scale 30). CT scan 19 hours after the injury demonstrated a contusional hematoma in the right frontal lobe, faint subarachnoid hemorrhage in the left sylvian fissure and subdural hematoma in the interhemispheric fissure. His consciousness was disturbed on the 14th day. CT scan demonstrated a left subdural effusion, which was surgically evacuated. However, from the next day the patient developed left hemiparesis. Right carotid angiogram on the 17th day after the injury revealed multiple segmental arterial narrowing in the right anterior cerebral artery (ACA) and middle cerebral artery (MCA). We diagnosed a posttraumatic delayed cerebral arterial spasm. CT scan revealed low density areas in the right ACA and MCA territory. The pathogenesis of posttraumatic delayed arterial spasm is not yet well known. Now, four theories have been suggested as follows: (1) Subarachnoid hemorrhage, (2) Direct mechanical injury to the arterial wall, (3) Hypothalamus dysfunction, and (4) Disturbed autoregulation. In our case, three important factors are suggested. The first is direct injury to the artery, the second is cerebral contusion, and the third is subdural effusion.
Surface organometallic chemistry: formation of HFe<sub>3</sub>(CO)<sub>11</sub>- from Fe<sub>3</sub>(CO)<sub>12</sub> and Fe(CO)<sub>5</sub> on silica, alumina, magnesia, and zinc oxide (1982)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface organometallic chemistry: formation of HFe3(CO)11- from Fe3(CO)12 and Fe(CO)5 on silica, alumina, magnesia, and zinc oxideF. Hugues, J. M. Bassett, Y. Ben Taarit, A. Choplin, M. Primet, D. Rojas, and A. K. SmithCite this: J. Am. Chem. Soc. 1982, 104, 25, 7020–7024Publication Date (Print):December 1, 1982Publication History Published online1 May 2002Published inissue 1 December 1982https://pubs.acs.org/doi/10.1021/ja00389a022https://doi.org/10.1021/ja00389a022research-articleACS PublicationsRequest reuse permissionsArticle Views358Altmetric-Citations79LEARN 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
High-Efficiency Second Harmonic Generation from a Single Hybrid ZnO Nanowire/Au Plasmonic Nano-Oligomer (2014)

We introduce a plasmonic-semiconductor hybrid nanosystem, consisting of a ZnO nanowire coupled to a gold pentamer oligomer by crossing the hot-spot. It is demonstrated that the hybrid system exhibits a second harmonic (SH) conversion efficiency of ∼3 × 10(-5)%, which is among the highest values for a nanoscale object at optical frequencies reported so far. The SH intensity was found to be ∼1700 times larger than that from the same nanowire excited outside the hot-spot. Placing high nonlinear susceptibility materials precisely in plasmonic confined-field regions to enhance SH generation opens new perspectives for highly efficient light frequency up-conversion on the nanoscale.
Control of Gold Nanoparticle Aggregates by Manipulation of Interparticle Interaction (2005)

The size of gold nanoparticle aggregates was controlled by manipulating the interparticle interaction. To manipulate the interparticle interaction of gold nanoparticles prepared by citrate reduction, we applied the substitutive adsorption of benzyl mercaptan on the particle surface in the absence of the cross-linking effect. Various experimental techniques such as UV-vis absorption spectroscopy, surface-enhanced Raman scattering, quasi-elastic light scattering, and zeta-potential measurement were used to characterize the nanoparticle aggregates. Our results suggest that the replacement of the trivalent citrate ions adsorbed on the nanoparticle surface with monovalent benzyl mercaptan ions should destabilize the particles, causing aggregation and hence the increase in the size of nanoparticle aggregates. These experimental results were successfully rationalized by the classical DLVO (Derjaguin-Landau-Vervey-Overbeek) theory that describes the interparticle interaction and colloidal stability in solution. Our findings suggest that the control of surface potential is crucial in the design of stable gold nanoparticle aggregates.
Ferroelectric Behavior in Poly-L-Lactic Acid (1996)

Ferroelectric behavior was observed in poly-L-lactic acid (PLLA), though its crystal structure was previously reported to be nonpolar because the molecular chains are helical. The remanent polarization ( P r ) increased with increasing temperature while the coercive electric field ( E c ) decreased. The remanent polarization and coercive electric field at 130° C were 96 mC/m 2 and 20 MV/m, respectively. Structural change upon application of an external electric field was observed by IR analysis, XRD and DSC measurements which suggested the possibility of polarization reversal in PLLA. The pyroelectric constant of a poled sample ( T p =130° C t p =5 min E p =50 MV/m) at room temperature was 10 µ C/m 2 ·K and became almost zero at the glass transition temperature, but increased again to 20 µ C/m 2 ·K at 85° C, and was stable up to 140° C.
Fourier transform ion cyclotron resonance mass spectrometry: Personal computer-based instrument and two-dimensional spectroscopy (1989)

A personal computer based Fourier transform ion cyclotron resonance mass spectrometer has been designed and constructed. An IBM PC AT compatible computer is used to host the interface of the instrument. The advantages of using a personal computer to host the FT-ICR instrument include: (1) very low cost of the computer; (2) extensive graphic and mathematic capabilities; (3) easy performance alteration or expansion; (4) an abundance of application software; and (5) support for a wide range of output devices. A dedicated digital hardware interface, which provides high speed data transfer and accurate timing control, was assembled on the computer's extension board. The extension board is used to replace the frequency synthesizers and waveform recorders normally used for arbitrary waveform generation and data acquisition at a speed of several mega Hertz. The unique features of the digital hardware design include: (1) common memory for both excitation and data acquisition; (2) control logic for critical timing steps; (3) system memory mapping for fast data transfer. This design has not only led to great reduction in construction cost but has increased the flexibility of the instrument to perform complex experiments as well. A general phase modulation algorithm for the stored waveform inverse Fourier transform (SWIFT) excitation has been developed. The method can be used to generate arbitrary excitation waveforms with optimal dynamic range reduction. The maximum entropy spectral analysis (MEM) has been investigated. When the broad-band MEM method was demonstrated in the host computer, resolution and signal-to-noise ratio improvement was observed. New preamplifier, electron beam circuits, and the sample inlet system of the instrument were designed and constructed with computer control. This provides the instrument with reliability, stability, and functionality. A theoretical model for two dimensional Fourier transform ion cyclotron resonance mass spectrometry has been proposed. The model interprets the physical significance of the modulation of the ion signals in the additional dimension. According to the model, the additional time dimension (which is introduced as the duration between the pair of 2D excitation pulses) determines the speed of the primary ions just before the reaction period. The speed modulation may result in primary ion population modulation. In general, the speed modulation will transfer into ion signal modulation through a variety of channels, such as reactions and ion loss. The model also predicts that the ion modulation in the additional dimension is not sinusoidal (therefore, harmonics exist) and the ion signal modulation has definite phase relationships. The implementation of the 2D technique is developed and demonstrated.
Pre-Shared Key (PSK) Ciphersuites with NULL Encryption for Transport Layer Security (TLS) (2007)

for the Pre-Shared Key (PSK) based Transport Layer Security (TLS) protocol. These ciphersuites are useful when authentication and integrity protection is desired, but confidentiality is not needed or not permitted.
Coding image sequence intensities along motion trajectories using EC-CELP quantization (2002)

The goal of this work is to investigate a high quality, low bit rate image sequence coding scheme which takes full advantage of the temporal redundancies. Such schemes will be important for high-compression video coding, such as the one studied in MPEG-4. In conventional image sequence coding, a motion-compensated DPCM configuration is used to remove the temporal redundancies. The performance of the DPCM for such highly correlated sources at rates below one bps degenerates substantially. We have recently shown that for a highly correlated Gauss-Markov source, practical near rate-distortion function performance is possible. We used the entropy-constrained code-excited linear predictive (EC-CELP) quantization scheme to obtain such performances. Hence for low rate image sequence coding, to improve the rate-distortion performance, an EC-CELP configuration can replace the DPCM configuration to quantize the image intensities along motion trajectories. To apply EC-CELP quantization, we first investigate the methods of motion trajectory estimation and propose a temporal block motion compensation configuration. Then, the performance advantage of EC-CELP configuration over the conventional DPCM structures is shown.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Evaluation of a local DC load flow screening method for branch contingency selection of overloads (1988)

The author presents a novel screening method, involving a local DC solution, for branch flow limit violations (overloads) which, when incorporated with a performance index (PI) method, can greatly enhance the selection capabilities for online as well as study purposes. The local DC screening method and PI method are compared to results obtained from a full-system DC load flow assessment of two cases: a 24-bus system and a 584-bus representation of the Mid-Continent Area Power Pool system. The results indicate that, when these two methods are combined, excellent contingency selection capabilities are produced. The philosophy for this implementation and the details needed to implement the local DC screening method are presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
A novel grid impedance estimation technique based on adaptive virtual resistance control loop applied to distributed generation inverters (2013)

The penetration of the distributed power generation systems (DPGSs) based on renewable sources (PV, WT) is strongly dependent on the quality of the power injected to the utility grid. However, the grid impedance variation, mainly caused by grid faults somewhere in the electric network, can degrade the power quality and even damage some sensitive loads connected at the point of the common coupling (PCC). This paper presents detection-estimation method of the grid impedance variation. This estimation tehnique aims to improve the dynamic of the distributed generation (DG) interfacing inverter control and to take the decision of either keep the DG connected, or disconnect it from the utility grid. The proposed method is based on a fast and easy grid fault detection method. A virtual damping resistance is used to drive the system to the resonance in order to extract the grid impedance parameters, both resistive and inductive parts, using resonant filter frequency determination. Theoretical analysis and simulation results are presented to validate the proposed method.
Ex vivo and in vivo Protein A Perfusion: Background, Basic Investigations, and First Clinical Experiences (1987)

During the past several years clinical protein A perfusion has attracted much attention because it allows to selectively remove IgG subclasses 1, 2, 4 and probably IgG-containing immune complexes, and has a tumoricidal effect in experimental animals and in some cancer patients. Due to several drawbacks, this therapy is not yet generally accepted. Our first experience with laboratory and clinical protein A perfusions confirms several limitations of this new apheresis therapy. Plasma IgG extraction in the ex vivo system under investigation and during clinical application of protein A perfusion reached a 10:1 ratio of grams IgG removed per gram solid-phase protein A only in 2 of 5 runs. Nevertheless, the absolute amount of IgG removed was very low in all runs due to the restricted protein A load (maximum 200 mg) per column. Removal capacity can be increased by a two-column switch-over system with subsequent perfusion and elution. Furthermore, the side effects observed in both in vivo treatments exceeded by far those of other extracorporeal therapies and had not been observed in more than 1,200 unselective plasma exchanges or in 50 cascade filtrations in our center. C3a generation in protein A perfusion is, however, comparable to cascade filtration, but exceeds that of unselective plasma exchange and is lower than in hemodialysis. Consequently, side effects in protein A perfusion cannot be correlated with the total amount of anaphylatoxin generated but may be due to a leakage of protein A or contaminants. Clinical application of protein A perfusion needs a more detailed elaboration in respect to biocompatibility, removal capacity, and the significance of the induced biological effects.