gebhart/patrepeval huggingface dataset:
Multiresolution BSP trees applied to terrain, transparency, and general objects (1997)

We present a system for incorporating multiple level of detail (LOD) models of 3D objects within a single hierarchical data structure. This system was designed for a scientific visualization application involving terrain and volume rendering. Our data structure is a modified Binary Space Partitioning (BSP) tree. We describe how our tree construction and traversal routines may be used with a variety of LOD methods. This is demonstrated with two different LOD methods: a new method specialized for terrain elevation height fields, and an existing method for general objects. Images, timings, and storage data for our implementation are provided.
Wavefield extrapolation in laterally varying VTI media (2003)

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2003Wavefield extrapolation in laterally varying VTI mediaAuthors: Anatoly BaumsteinJohn E. AndersonAnatoly BaumsteinExxonMobil Upstream Research Company, P.O. Box 2189, Houston TX 77252‐2189 and John E. AndersonExxonMobil Upstream Research Company, P.O. Box 2189, Houston TX 77252‐2189https://doi.org/10.1190/1.1818100 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink: https://doi.org/10.1190/1.1818100FiguresReferencesRelatedDetailsCited byAngle-domain common-image gathers from anisotropic Gaussian beam migration and its application to anisotropy-induced imaging errors analysis18 January 2017 | Journal of Earth System Science, Vol. 126, No. 1Inline delayed-shot migration in tilted elliptical-cylindrical coordinatesJeffrey Shragge and Guojian Shan5 October 2010 | GEOPHYSICS, Vol. 75, No. 5Plane wave migration in TI mediaLi Han, Liguo Han, Xiangbo Gong, and Jie Cui21 October 2010Optimized implicit finite-difference and Fourier finite-difference migration for VTI mediaGuojian Shan15 December 2009 | GEOPHYSICS, Vol. 74, No. 6An upside‐down approach to efficient surface‐related and interbed multiple predictionAnatoly Baumstein15 December 2008Anisotropic reverse-time migration for tilted TI mediaGeophysical Prospecting, Vol. 55, No. 6Optimized implicit finite‐difference migration for TTI mediaGuojian Shan14 September 2007Selection of reference‐anisotropy parameters for wavefield extrapolation by Lloyd's algorithmYaxun Tang and Robert G. Clapp6 October 2006Optimized implicit finite‐difference migration for VTI mediaGuojian Shan6 October 20063D wavefield extrapolation in laterally‐varying tilted TI mediaGuojian Shan and Biondo Biondi7 December 2005Imaging steeply dipping reflectors in TI media by wavefield extrapolationGuojian Shan and Biondo Biondi7 December 20053D fourier finite difference anisotropic depth migrationLinbin Zhang, Biaolong Hua, and Henri Calandra7 December 2005Wave equation prestack depth migration in laterally varying VTI mediaJiaxiang Ren, Clive Gerrard, James McClean, and Mikhail Orlovich7 December 2005Ray tracing in tilted transversely isotropic media: a group velocity approachThomas A. Dickens3 January 2005 SEG Technical Program Expanded Abstracts 2003ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2003 Pages: 2452 publication data© 2003 Copyright © 2003 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 03 Jan 2005 CITATION INFORMATION Anatoly Baumstein and John E. Anderson, (2003), "Wavefield extrapolation in laterally varying VTI media," SEG Technical Program Expanded Abstracts : 945-948. https://doi.org/10.1190/1.1818100 Plain-Language Summary PDF DownloadLoading ...
Appletizing: running legacy Java code remotely from a Web browser (2005)

Adding distributed capabilities to existing programs has come to the forefront of software evolution. As a standard Java distributed technology, applets offer the advantages of being easily deploy able over Web browsers and requiring little to no explicit distributed programming. Yet applets are inflexible: they download remote code and run it only on the client machine. We present appletizing: a semi-automatic approach to transforming a Java GUI application into a client-server application, in which the client runs as a Java applet that communicates with the server through RMI. To enable appletizing, we have expanded the capabilities of J-Orchestra, our automatic partitioning system that takes as input a Java application in bytecode format and transforms it into a distributed application, running across multiple standard JVMs. We discuss the motivation, benefits, and J-Orchestra support for appletizing, and validate our approach via a set of case studies and associated benchmarks.
On-line monitoring of HV bushings and current transformers (2006)

There has been a pressing need for on-line monitoring and diagnostic techniques for HV bushings and current transformers where deterioration often results in catastrophic failure. This paper expands the available information on this topic and presents the technique for the on-line measurement of dielectric power-factor and capacitance using the Doble M4000 insulation analyzer.
On the Debt of Chinese Railway (2000)

Chinese railway is in situation of the shortage of railway construction capital and the heavy debt. This paper presents the causes of the debt of Chinese railway from many aspects. Based on the analysis of the financial ratio, the paper points out the defects such as the low capacity of the debt service and the single structure of the debt of Chinese railway in its operation and construction. The paper also suggests that how to deal with the debt has become the key to the development of Chinese railway, and makes discussion further on optimization of the debt of Chinese railway as to the defects of its.
Efficient Second-Harmonic Generation with a Slab Waveguide Composed of Periodically Corona-Poled Organic Copolymer (1992)

Using the slab waveguide composed of spin-coated vinylidene cyanide/vinyl acetate (VDCN/VAc) organic copolymer having the square-shaped corrugation of nonlinear optical susceptibility χ (2) with corona discharge in the guiding layer, and taking quasi-phase matching between the dominant modes of both fundamental and second-harmonic waves, enhancement of second-harmonic generation (SHG) has been demonstrated at Nd:YAG 1.06 µm and Er:YAG 2.94 µm laser lines. The SHG power with this χ (2) corrugated slab guide is theoretically evaluated, together with its enhancement factor ( E.F. ) to a bulk scheme. The E.F. of 500 to 800 obtained in the experiments is consistent with the theoretical estimates.
Surveying the complementary role of automatic data analysis and visualization in knowledge discovery (2009)

The aim of this work is to survey and reflect on the various ways to integrate visualization and data mining techniques toward a mixed-initiative knowledge discovery taking the best of human and machine capabilities. Following a bottom-up bibliographic research approach, the article categorizes the observed techniques in classes, highlighting current trends, gaps, and potential future directions for research. In particular it looks at strengths and weaknesses of information visualization and data mining, and for which purposes researchers in infovis use data mining techniques and reversely how researchers in data mining employ infovis techniques. The article further uses this information to analyze the discovery process by comparing the analysis steps from the perspective of information visualization and data mining. The comparison permits to bring to light new perspectives on how mining and visualization can best employ human and machine skills.
Simplified spiking neural network architecture and STDP learning algorithm applied to image classification (2015)

Spiking neural networks (SNN) have gained popularity in embedded applications such as robotics and computer vision. The main advantages of SNN are the temporal plasticity, ease of use in neural interface circuits and reduced computation complexity. SNN have been successfully used for image classification. They provide a model for the mammalian visual cortex, image segmentation and pattern recognition. Different spiking neuron mathematical models exist, but their computational complexity makes them ill-suited for hardware implementation. In this paper, a novel, simplified and computationally efficient model of spike response model (SRM) neuron with spike-time dependent plasticity (STDP) learning is presented. Frequency spike coding based on receptive fields is used for data representation; images are encoded by the network and processed in a similar manner as the primary layers in visual cortex. The network output can be used as a primary feature extractor for further refined recognition or as a simple object classifier. Results show that the model can successfully learn and classify black and white images with added noise or partially obscured samples with up to ×20 computing speed-up at an equivalent classification ratio when compared to classic SRM neuron membrane models. The proposed solution combines spike encoding, network topology, neuron membrane model and STDP learning.
Enhanced Anti-tumor Reactivity of Cytotoxic T Lymphocytes Expressing PD-1 Decoy (2016)

Programmed death-1 (PD-1) is a strong negative regulator of T lymphocytes in tumor-microenvironment. By engaging PD-1 ligand (PD-L1) on tumor cells, PD-1 on T cell surface inhibits anti-tumor reactivity of tumor-infiltrating T cells. Systemic blockade of PD-1 function using blocking antibodies has shown significant therapeutic efficacy in clinical trials. However, approximately 10 to 15% of treated patients exhibited serious autoimmune responses due to the activation of self-reactive lymphocytes. To achieve selective activation of tumor-specific T cells, we generated T cells expressing a dominant-negative deletion mutant of PD-1 (PD-1 decoy) via retroviral transduction. PD-1 decoy increased IFN-γ secretion of antigen-specific T cells in response to tumor cells expressing the cognate antigen. Adoptive transfer of PD-1 decoy-expressing T cells into tumor-bearing mice potentiated T cell-mediated tumor regression. Thus, T cell-specific blockade of PD-1 could be a useful strategy for enhancing both efficacy and safety of anti-tumor T cell therapy.
QoS-based WebRTC access to an EPS network infrastructure (2015)

This paper describes a method to support QoS using WebRTC-based Clients integrated in mobile devices conformed to 3GPP Rel. 8 Public Land Mobile Network infrastructure. To enrich the experience for mobile customers using this upcoming technology, the article focuses on the merging of the technical capabilities arising from both the Evolved Packet System inherent QoS mechanisms and the WebRTC specific session establishment procedures. Advantages of these different technologies are introduced and involved in the authors' concept. The presented proposal reuses the 3GPP-based EPS network infrastructure and the IMS-based WebRTC client access architecture as well as a state of the art WebRTC browser client. The ongoing WebRTC standardisation process is considered. A first prototype for session signalling has been successfully developed involving an OpenIMSCore testbed, an EPC infrastructure as well as a typical WebRTC client.
Valmet: A New Validation Tool for Assessing and Improving 3D Object Segmentation (2001)

Extracting 3D structures from volumetric images like MRI or CT is becoming a routine process for diagnosis based on quantitation, for radiotherapy planning, for surgical planning and image-guided intervention, for studying neurodevelopmental and neurodegenerative aspects of brain diseases, and for clinical drug trials. Key issues for segmenting anatomical objects from 3D medical images are validity and reliability. We have developed VALMET, a new tool for validation and comparison of object segmentation. New features not available in commercial and public-domain image processing packages are the choice between different metrics to describe differences between segmentations and the use of graphical overlay and 3D display for visual assessment of the locality and magnitude of segmentation variability. Input to the tool are an original 3D image (MRI, CT, ultrasound), and a series of segmentations either generated by several human raters and/or by automatic methods (machine). Quantitative evaluation includes intra-class correlation of resulting volumes and four different shape distance metrics, a) percentage overlap of segmented structures (R intersect S)/(R union S), b) probabilistic overlap measure for non-binary segmentations, c) mean/median absolute distances between object surfaces, and maximum (Hausdorff) distance. All these measures are calculated for arbitrarily selected 2D cross-sections and full 3D segmentations. Segmentation results are overlaid onto the original image data for visual comparison. A 3D graphical display of the segmented organ is color-coded depending on the selected metric for measuring segmentation difference. The new tool is in routine use for intra- and inter-rater reliability studies and for testing novel automatic machine-segmentation versus a gold standard established by human experts. Preliminary studies showed that the new tool could significantly improve intra- and inter-rater reliability of hippocampus segmentation to achieve intra-class correlation coefficients significantly higher than published elsewhere.
d-Peptide Ligands for the Co-chaperone DnaJ (1998)

The molecular chaperone DnaK, the Hsp70 homolog of Escherichia coli, binds hydrophobic polypeptide segments in extended conformation. The co-chaperone DnaJ (Hsp40) has been reported to bind native and denatured proteins as well as peptides. We tested pseudo-peptides of D-amino acids as ligands for both chaperones. In comparison to the parent all-L peptide, these mimetics had either enantiomorphic side chain positions combined with retained main chain direction (normal all-D peptide) or unchanged side chain topology together with reverse direction of the peptide backbone (retro all-D peptide). The peptides were labeled with acrylodan (a), and their binding to DnaK and DnaJ was monitored by the accompanying increase in fluorescence intensity. The parent all-L peptide a-CALLLSAARR bound to both DnaK (Kd = 0.1 microM) and DnaJ (Kd = 9.2 microM). In contrast, the normal all-D and retro all-D peptides did not bind to DnaK; they bound, however, to DnaJ with Kd values of 6.8 microM and 0.9 microM, respectively. The emission spectra of the DnaJ-bound peptides suggests that DnaJ bound both D-peptides with the same main chain direction as L-peptides. Binding of the normal all-D and all-L peptides inhibited the DnaJ-induced stimulation of DnaK ATPase. However, binding of the retro all-D analog to DnaJ did not impair the stimulation, indicating the existence of separate binding sites for peptides and DnaK.
Antibody-enhanced pneumococcal adherence requires IgA1 protease (2003)

IgA, the major class of Ig in secretions, classically functions by interfering with microbial attachment to host tissues. Many mucosal pathogens, including Streptococcus pneumoniae, express an IgA1 protease that may circumvent the protective effects of this Ig subclass. Because these proteases are specific for human IgA1, we generated human mAbs to the major surface antigen of the pneumococcus, its capsular polysaccharide, and tested their effect in a colonization model of bacterial adherence to respiratory epithelial cells in culture. Rather than inhibiting adherence, type-specific IgA1 markedly enhanced bacterial attachment to host cells, but only when cleaved by IgA1 protease. Neither antibodies of protease-insensitive subclasses (IgA2 and IgG) nor those directed against heterologous capsules had such activity. The adherence-promoting properties of cleaved antibodies correlated with the cationic characteristics of their variable segments, suggesting that bound Fab fragments may neutralize the inhibitory effect of negatively charged capsules on adhesive interaction with host cells. Coating of pneumococci with anticapsular polysaccharide antibody unmasked the bacterial phosphorylcholine ligand, allowing for increased adherence mediated by binding to the platelet activating factor receptor on epithelial cells. In addition, our findings provide evidence for a novel function of bacterial IgA1 proteases. These enzymes may enable pathogens to subvert the antigen specificity of the humoral immune response to facilitate adhesive interactions and persistence on the mucosal surface.
Synthesis of Highly Monodisperse Silver Nanoparticles from AOT Reverse Micelles:  A Way to 2D and 3D Self-Organization (1997)

A simple method is used to prepare highly monodispersed silver nanoparticles in the liquid phase, which starts from an initial synthesis in functionalized AOT reverse micelles. To narrow the particle size distribution from 43% to 12.5% in dispersion, the particles are extracted from the micellar solution. The size-selected precipitation method is used. The decrease in polydispersity of the silver nanoparticles is followed by transmission electron microscopy, by UV−vis spectroscopy, and by small-angle X-ray scattering. The nanocrystallites dispersed in hexane are deposited on a support. A monolayer made of nanoparticles with spontaneous hexagonal organization is observed. The immersion of the support on the solution yields to the formation of organized multilayers arranged as microcrystal in a face-centered cubic structure.
An Efficient Intensity Correction Algorithm for High Definition Video Surveillance Applications (2011)

The video surveillance market is increasingly moving toward cheaper, efficient, portable, and high resolution systems. A typical video surveillance system consists of several cameras, which issue warnings or initiate smart reactions according to the analysis results of the captured video data. Many algorithms in video surveillance systems assume fixed lighting conditions for the monitored area. The performance of these algorithms is severely affected by the illumination changes of the monitored area. This paper presents an efficient intensity correction algorithm for high definition video surveillance applications. The new algorithm corrects both the global and the local intensity changes. It uses an apparent gain factor to correct the global intensity changes. In addition it corrects the local intensity changes using the local intensity mean and standard deviation. The proposed algorithm shows a promising performance when compared with other intensity correction algorithms. It has a low computational cost that makes it a suitable choice for real-time hardware implementation. This paper also presents a hardware implementation of the proposed algorithm using Xilinx Spartan3A digital signal processor (DSP) XC3SD3400A device. The targeted resolution is 1920 × 1080 at 30 f/s. The hardware prototype utilizes 17% of the slices, 21% of the block random access memories, and 24% of the DSP48As available in Spartan3A DSP XC3SD3400A device.
[Culture of chondrocytes using allogenous acellular cartilaginous matrix]. (1999)

The surface condition of the scaffold has a notable influence on the growth of the cells. The allogenous acellular cartilaginous matrix may provide a suitable condition for chondrocytes, and it has the possibility to be developed as a natural scaffold for tissue engineering.
Carbonyl-Iron Electrodes for Rechargeable-Iron Batteries (2015)

Abstract Nickel-iron and iron-air batteries are attractive for large-scale-electrical-energy storage because iron is abundant, low-cost and non-toxic. However, these batteries suffer from poor charge acceptance due to hydrogen evolution during charging. In this study, we have demonstrated iron electrodes prepared from carbonyl iron powder (CIP) that are capable of delivering a specific discharge capacity of about 400 mAh g−1 at a current density of 100 mA g−1 with a faradaic efficiency of about 80%. The specific capacity of the electrodes increases gradually during formation cycles and reaches a maximum in the 180th cycle. The slow increase in the specific capacity is attributed to the low surface area and limited porosity of the pristine CIP. Evolution of charge potential profiles is investigated to understand the extent of charge acceptance during formation cycles. In situ XRD pattern for the electrodes subsequent to 300 charge/discharge cycles confirms the presence of Fe with Fe(OH)2 as dominant phase.
Solving, rating and generating Sudoku puzzles with GA (2007)

This paper studies the problems involved in solving, rating and generating Sudoku puzzles with genetic algorithms (GA). Sudoku is a number puzzle that has recently become a worldwide phenomenon. Sudoku can be regarded as a constraint satisfaction problem. When solved with genetic algorithms it can be handled as a multi-objective optimization problem. The three objectives of this study was: 1. to test if genetic algorithm optimization is an efficient method for solving Sudoku puzzles, 2. can GA be used to generate new puzzles efficiently, and 3. can GA be used as a rating machine that evaluates the difficulty of a given Sudoku puzzle. The last of these objectives is approached by testing if puzzles that are considered difficult for a human solver are also difficult for the genetic algorithm. The results presented in this paper seem to support the conclusion that these objectives are reasonably well met with genetic algorithm optimization.
Morphogenic Light Reflected to Developing Cotton Leaves Affects Insect‐Attracting Terpene Concentrations (2004)

Cotton ( Gossypium hirsutum L.) leaves accumulate volatile terpenes that have been implicated in the attraction of both insect pests and the arthropods which prey on them. Our objective was to determine if altering the light environment of developing cotton leaves could affect the accumulation of these attractants. Plants were grown in drip‐irrigated plots over colored polyethylene soil covers that reflected various combinations and intensities of red (R), far‐red (FR), blue (BL), and photosynthetic photon flux (PPF). Individual terpenes were quantified by gas chromatography and identified by mass spectroscopy. Leaves exposed to a low amount of reflected BL and a FR/R ratio higher than that of incoming sunlight were thinner than leaves exposed to high amounts of reflected BL and PPF during development. Increasing the FR/R ratio while decreasing the amount of BL reflected to developing cotton leaves increased the leaf content of insect‐attracting terpenes such as α‐pinene and β‐pinene on both leaf area and fresh weight bases. We conclude that altering the color of light reflected to developing cotton leaves can affect leaf content of insect attractants.