gebhart/patrepeval huggingface dataset:
Mitigate Funnel Effect in Sensor Networks with Multi-interface Relay Nodes (2012)

Overlay network architectures that use orthogonal channels have been known to provide effective additional resources to underlying networks in high demand. Overlays are composed of relay nodes provided with rich computational resources and multiple wireless interfaces that make them capable of establishing several non-interfering networks. These networks can be used to move traffic around in a non-interfering manner. It is possible to deploy such overlays in sensor networks where sensors suffer from the funnel effect caused by excess traffic flows, to help mitigate this effect. In this paper we address the geographical placement of relay nodes in the region to mitigate the funnel effect in sensor networks. We provide an O (mlog (h) ) algorithm of congested region size m and computed Convex Hull size h that finds the placement of the minimum number of relay nodes to cover the entire congested region. In a greedy fashion, we place a relay node given the following placement conditions: the closest position such that it covers the largest amount of peers up to an extent parameter bounded by its transmission range, and that is closest to the sink. Our simulated results show that using a minimum number of relays, we could save up to 43% of nodes compared to a simple placement strategy, the underlying network increases its delivery ratio and throughput, improves its jitter, and opens the possibility of load balancing and fairness advantages.
Poroelastic modeling of seismic boundary conditions across a fracture (2007)

Permeability of a fracture can affect how the fracture interacts with seismic waves. To examine this effect, a simple mathematical model that describes the poroelastic nature of wave-fracture interaction is useful. In this paper, a set of boundary conditions is presented which relate wave-induced particle velocity (or displacement) and stress including fluid pressure across a compliant, fluid-bearing fracture. These conditions are derived by modeling a fracture as a thin porous layer with increased compliance and finite permeability. Assuming a small layer thickness, the boundary conditions can be derived by integrating the governing equations of poroelastic wave propagation. A finite jump in the stress and velocity across a fracture is expressed as a function of the stress and velocity at the boundaries. Further simplification for a thin fracture yields a set of characteristic parameters that control the seismic response of single fractures with a wide range of mechanical and hydraulic properties. These boundary conditions have potential applications in simplifying numerical models such as finite-difference and finite-element methods to compute seismic wave scattering off nonplanar (e.g., curved and intersecting) fractures.
DejaView (2007)

As users interact with the world and their peers through their computers, it is becoming important to archive and later search the information that they have viewed . We present DejaView, a personal virtual computer recorder that provides a complete record of a desktop computing experience that a user can playback, browse, search, and revive seamlessly. DejaView records visual output, checkpoints corresponding application and file system state, and captures displayed text with contextual information to index the record. A user can then browse and search the record for any visual information that has been displayed on the desktop, and revive and interact with the desktop computing state corresponding to any point in the record. DejaView combines display, operating system, and file system virtualization to provide its functionality transparently without any modifications to applications, window systems, or operating system kernels. We have implemented DejaView and evaluated its performance on real-world desktop applications. Our results demonstrate that DejaView can provide continuous low-overhead recording without any user noticeable performance degradation, and allows browsing, search and playback of records fast enough for interactive use.
Design and field test of drilling composite impactor (2020)

Abstract When the PDC drill bit encounters the heterogeneous and highly abrasive formation, it comes up with problems such as serious stick-slip phenomenon, shallow depth of penetration and short service life, and meanwhile, the rapid drilling tool with a single impact function cannot meet the drilling acceleration demand of exploration and development in deeper and more complex formation. Therefore, as a complementary implement of the traditional percussion drilling tools, a efficient drilling composite impactor has been designed, which is capable of applying both the reciprocating torsional impact and the reciprocating axial impact. The impact characteristic parameters of the tool have been obtained through the ground performance test, which also verifying the reliability of the composite impact timing, in addition, the field application has been carried out in Tian17-Xie12 well. And the results show that the key drilling parameters, such as well inclination and azimuth, change stably, thus shortening the sliding drilling time, and compared with adjacent wells, the tool above-mentioned has improved the mechanical drilling rate by 38%.
Structurally and morphologically engineered chalcogenide materials for optical and photonic devices (2021)

We discuss several recent advances in the development of methodologies and techniques used to structurally and morphologically engineer chalcogenide (ChG) materials. We introduce two ChG patterning techniques both offering spatial resolution beyond the classical single-photon diffraction limit: multiphoton lithography and thermal scanning probe lithography (TSPL). The former was applied to produce nanoscale modifications in thermally deposited As2S3, and we realized gradient refractive index (GRIN) effective medium lens fabrication in multilayer As2S3-As2Se3 films with features as small as 120 nm using this approach. The GRIN lens was shown to be optically functional. ChG Ge-Sb-Se-Te (GSST) material was also explored for its potential as a phase-change material (PCM). We demonstrated nanoscale feature patterning using TSPL in PCMs with critical dimensions below 100 nm. In addition, new patterning methods, we also report solution processing of GSST PCMs as an alternative route for ChG film deposition. These new material processing and structuring techniques will offer new pathways for creating functional planar optical and photonic devices.
Search for Pair Production of Scalar Top Quarks Decaying to aτLepton and abQuark inpp¯Collisions ats=1.96  TeV (2008)

We search for pair production of supersymmetric top quarks (t over1), followed by R-parity violating decay t over1-->taub with a branching ratio beta, using 322 pb(-1) of pp over collisions at sqrt s=1.96 TeV collected by the upgraded Collider Detector at Fermilab. Two candidate events pass our final selection criteria, consistent with the standard model expectation. We set upper limits on the cross section sigma(t over1t over1) x beta2 as a function of the top-squark mass m(t over1). Assuming beta=1, we set a 95% confidence level limit m(t over1)>153 GeV/c2. The limits are also applicable to the case of a third-generation scalar leptoquark (LQ3) decaying LQ3-->taub.
Echantillonnage et reconstitution analogique (2007)

Auteur de l'ouvrage : Emmanuel Godoy
Thermal Energy Storage Technology (1987)

Revue des developpements en cours concernant le stockage de l'energie solaire: accumulation par chaleur sensible avec d'autres milieux que l'eau, l'accumulation par chaleur latente et chimique
An Area based Technique for Image-to-Image Registration of Multi-Modal Remote Sensing Data (2008)

This paper outlines further tests of the automatic image-to-image registration technique of Bunting et al with the inclusion of joint histogram image similarity metrics. These metrics were expected to increase the accuracy of the algorithms results given that previous literature has highlighted these metrics as optimal for multi-modal registration. But, this study has demonstrated the opposite with the correlation coefficient producing better matching results than the mutual information, kolmogorov distance and distance to independence metrics.
2,4-dienoyl-CoA reductase regulates lipid homeostasis in treatment-resistant prostate cancer (2020)

Despite the clinical success of Androgen Receptor (AR)-targeted therapies, reactivation of AR signalling remains the main driver of castration-resistant prostate cancer (CRPC) progression. In this study, we perform a comprehensive unbiased characterisation of LNCaP cells chronically exposed to multiple AR inhibitors (ARI). Combined proteomics and metabolomics analyses implicate an acquired metabolic phenotype common in ARI-resistant cells and associated with perturbed glucose and lipid metabolism. To exploit this phenotype, we delineate a subset of proteins consistently associated with ARI resistance and highlight mitochondrial 2,4-dienoyl-CoA reductase (DECR1), an auxiliary enzyme of beta-oxidation, as a clinically relevant biomarker for CRPC. Mechanistically, DECR1 participates in redox homeostasis by controlling the balance between saturated and unsaturated phospholipids. DECR1 knockout induces ER stress and sensitises CRPC cells to ferroptosis. In vivo, DECR1 deletion impairs lipid metabolism and reduces CRPC tumour growth, emphasizing the importance of DECR1 in the development of treatment resistance.
Widespread aplasia cutis congenita in sibs with PLEC1 and ITGB4 variants (2019)

Aplasia cutis congenita (ACC) is a heterogeneous group of disorders characterized by localized or widespread absence of skin. ACC can occur isolated or as part of a syndrome. Here we report two consanguineous families, each with two affected offspring. Affected individuals showed widespread ACC while the skin in between had a normal appearance. Ears and nose of the four patients were underdeveloped, otherwise there were no unusual physical characteristics and no internal organ anomalies. "Whole" exome sequencing (WES) of the mother of Family 1 yielded a pathogenic heterozygote variant in ITGB4. The father and healthy offspring were heterozygous for the same variant. WES of the mother of Family 2 yielded a variant in PLEC1. The father and grandmother, who had a history of two offspring with fatal ACC, were heterozygous for the same variant. PLEC1 and ITGB4 have both been previously been reported in association with ACC. We compare findings in earlier reported individuals with variants in ITGB4 and PLEC1, and provide a short summary of other entities going along with ACC.
An accurate gradient and Hessian reconstruction method for cell‐centered finite volume discretizations on general unstructured grids (2009)

Abstract In this paper, a novel reconstruction of the gradient and Hessian tensors on an arbitrary unstructured grid, developed for implementation in a cell‐centered finite volume framework, is presented. The reconstruction, based on the application of Gauss' theorem, provides a fully second‐order accurate estimate of the gradient, along with a first‐order estimate of the Hessian tensor. The reconstruction is implemented through the construction of coefficient matrices for the gradient components and independent components of the Hessian tensor, resulting in a linear system for the gradient and Hessian fields, which may be solved to an arbitrary precision by employing one of the many methods available for the efficient inversion of large sparse matrices. Numerical experiments are conducted to demonstrate the accuracy, robustness, and computational efficiency of the reconstruction by comparison with other common methods. Copyright © 2009 John Wiley &amp; Sons, Ltd.
Supplementary Figure 2 from Targeting uPAR with Antagonistic Recombinant Human Antibodies in Aggressive Breast Cancer (2023)

&lt;p&gt;PDF file - 71K, Scrambled matched isotype control IgGs labeld with AlexaFlupr 680 at 72hrs in MDA-MB-231 xenografts imaged in the Cy 5.5 channel at 72hr&lt;/p&gt;
Preparation of Cyclobutyl Group Carrying Cyclobutanones and Related Synthetic Building Blocks (2000)

Compounds 3, 4, 10, 12, 16, 17, and 19 have been prepared as possible starting materials for liquid crystals containing two cyclobutyl moieties combined in a 1,3-fashion. Further typical conversions of these have been tested giving 5, 7, and 14 for example. Useful intermediates 16 and 17 were also made.
Analysis and Design of Repetitive Control Systems Using the Regeneration Spectrum (1991)

The absolute and relative stability of continuous-time SISO repetitive control systems is examined here using a function of frequency termed the regeneration spectrum. The regeneration spectrum is easily computed and is related to important features of the characteristic root distribution of such systems, for large values of the time delay. The regeneration spectrum is combined with other frequency domain measures of control system performance such as the sensitivity and complementary sensitivity functions to obtain improved insight into the tradeoffs in repetitive control system design. The result is a more rational approach to repetitive control system design and is illustrated by an example.
Electro-organic Synthesis of N-Hexyl Carbamate by Carbonylation of Methanol and Hexylamine with CO over Au Supported on Carbon Anode (2002)

Abstract It has been found that Au anode, [AuBr3/AC+VGCF], showed the electro-catalysis for carbonylation of methanol, hexylamine and CO to 6-amino-hexyl-carbamic acid methyl ester (N-hexyl carbamate) using LiBr electrolyte.
Novel fluorescence resonance energy transfer optical sensors for vitamin B12 detection using thermally reduced carbon dots (2014)

After thermal reduction, the quantum yield of thermally reduced carbon dots demonstrated a 5-fold increase over that of the original carbon dots.
Processing techniques for vertical interconnects (2002)

Processing techniques that address the interconnect issues required for fabrication of deep sub-micron electronic devices and for three-dimensional (3D) integration of these components will be described. As the interconnect density increases, alternate methods of providing input/output (I/O) leads on a chip are required. One attractive approach to providing increased connectivity is to use through-wafer interconnects. This reduces the interconnect density on the front surface while providing additional I/Os on the back surface. It also provides a convenient mechanism for integrating two or more die to form a 3D integrated structure. Processing techniques under development include: high aspect ratio silicon etching, insulator lining, adhesion/barrier layer deposition, seed layer deposition, electroplating, and chemical mechanical planarization (CMP).
An adaptive method for the enhanced fusion of low-light visible and uncooled thermal infrared imagery (1997)

Night vision sensors, such as image-intensifier (II) tubes in night vision goggles and forward looking infrared sensors (FLIR) are routinely used by U.S. naval personnel for night operations. The quality of imagery from these devices however, can be extremely poor. Since these sensors exploit different regions of the electromagnetic spectrum, the information they provide is often complimentary, and therefore, improvements are possible with the enhancement and subsequent fusion of this information into a single presentation. Such processing can maximize scene content by incorporating information from both images as well as increase contrast and dynamic range. This thesis introduces a new algorithm, which produces such an enhanced/fused image. It performs adaptive enhancement of both the low-light visible (II) and thermal infrared imagery (IR) inputs, followed by a data fusion for combining the two images into a composite image. The methodology for visual testing of the algorithm for comparison of fused and original II and IR imagery is also presented and a discussion of the results is included. Tests confirmed that the fusion algorithm resulted in significant improvement over either single-band image
Improved gain chip holder design for high efficient, high power AlGaInP-VECSEL (2017)

In AlGaInP based VECSELs, a low thermal conductivity of the substrate with included distributed Bragg reflector leads to a strong temperature-dependent performance due to the limited charge-carrier confinement. For efficient heat removal, a good bonding between VECSEL-chip and intra-cavity heat spreader is indispensable. Here, a new designed sample holding device which allows improved bonding is presented. With this device, the laser performance of a barrier-pumped AlGaInP VECSEL emitting at 665 nm could be improved tremendously which resulted in an output power of more than 1W at a heatsink temperature of 10°C. We present a full characterization of the laser system including a comparison between standard and the new device.
Effect of Alcohol Solvents for Glycidyl Methacrylate in Radiation-Induced Graft Polymerization on Performance of Cation-Exchange Porous Membranes. (2002)

An epoxy-group-containing monomer, glycidyl methacrylate (GMA), was grafted onto a porous hollow-fiber membrane made of polyethylene, by radiation-induced graft polymerization. Four kinds of alcohol, i.e., methanol, ethanol, 1-propanol, and 1-butanol, were employed as the solvents for GMA. Grafting rate of GMA was decreased with increasing carbon number of alcohols. The epoxy group of the GMA-grafted membrane with a degree of grafting of 90 or 120% was converted to a sulfonic acid group at a molar conversion of 10 to 12%. Hen-egg lysozyme (HEL) dissolved in carbonate buffer solution (pH 9.0) was forced to permeate through the pores of the sulfonic-acid-group-containing porous hollow-fiber membranes prepared with various alcohol solvents. The binding capacity of HEL onto the membrane in equilibrium with the feed concentration of 0.5 g-HEL/L increased with the increase in the carbon number of alcohols. For example, the binding capacities of the membranes prepared with methanol and 1-butanol were 0.18 and 0.38 g-HEL/g-membrane, respectively. In contrast, the flux of the protein solution was decreased with increasing carbon number of alcohols. This demonstrates that longer polymer brushes are formed on the pore surface of the membrane prepared with a higher carbon number of alcohol employed as the solvent for GMA.
Double-blind, placebo-controlled study of botulinum toxin injections in the treatment of cervical dystonia. (1995)

Botulinum toxin injections were given to 23 patients with cervical dystonia in a double-blind, placebo-controlled, crossover study. Each patient was randomly given 100 units of botulinum A toxin and placebo in two respective sets of injections into the two most active contracting neck muscles at least 3 months apart. Before and 3 weeks after each set of injections, the cervical dystonia was "blindly" scored by the investigator. Each patient was also asked to independently score the improvement of the dystonia and neck pain. Four patients dropped out and one patient showed spontaneous remission. The remaining 18 patients completed the study and showed a significant improvement after the injections of botulinum toxin in comparison with that of the placebo. The effect started about 1 week after injection and the maximal effect lasted about 11 weeks in patients with a satisfactory response. The neck pain was satisfactorily relieved in 9 of 10 patients affected. There were no significant side effects. Thus, botulinum toxin injection is effective in treating cervical dystonias; injection of a higher dose of botulinum toxin in a greater number of neck muscles is required for those patients with complex cervical dystonia.
Unusually Short Chalcogen Bonds Involving Organoselenium: Insights into the Se–N Bond Cleavage Mechanism of the Antioxidant Ebselen and Analogues (2015)

Structural studies on the polymorphs of the organoselenium antioxidant ebselen and its derivative show the potential of organic selenium to form unusually short Se⋅⋅⋅O chalcogen bonds that lead to conserved supramolecular recognition units. Se⋅⋅⋅O interactions observed in these polymorphs are the shortest such chalcogen bonds known for organoselenium compounds. The FTIR spectral evolution characteristics of this interaction from solution state to solid crystalline state further validates the robustness of this class of supramolecular recognition units. The strength and electronic nature of the Se⋅⋅⋅O chalcogen bonds were explored using high-resolution X-ray charge density analysis and atons-in-molecules (AIM) theoretical analysis. A charge density study unravels the strong electrostatic nature of Se⋅⋅⋅O chalcogen bonding and soft-metal-like behavior of organoselenium. An analysis of the charge density around Se-N and Se-C covalent bonds in conjunction with the Se⋅⋅⋅O chalcogen bonding modes in ebselen and its analogues provides insights into the mechanism of drug action in this class of organoselenium antioxidants. The potential role of the intermolecular Se⋅⋅⋅O chalcogen bonding in forming the intermediate supramolecular assembly that leads to the bond cleavage mechanism has been proposed in terms of electron density topological parameters in a series of molecular complexes of ebselen with reactive oxygen species (ROS).
Electron Microscope Studies Of Vpe Gainas Layer Structures Suitable For Use As Infrared Leds (1980)

SUMMARY Electron microscope investigations have been carried out on vapour grown (100) GaAs/GaInAs structures designed for use as infrared emitters of wavelength 1·06 μm. The structures consist of a GaAs substrate, a graded layer in which the indium concentration is increased from zero to 17 atomic %, and a constant composition Ga 0·83 In 0·17 As layer which contains a p‐n junction. X‐ray microprobe analysis of cross‐sections of the slices established the uniformity of the grading. TEM analysis showed a dense and extensive asymmetric network of misfit dislocations (1 × 10 12 m −2 (10 8 cm −2 )) in the graded layer, threading dislocations and other anomalous contrast features extending from the graded layer through the p‐n junction to the surface (local densities of 1 × 10 11 –1 × 10 12 m −2 (10 7 –10 8 cm −2 )), and a planar network of dislocations just below the surface (spacing 0·2–2 μm). SEM EBIC and CL studies of the layer above the junction revealed dark spots, and a cross‐grid of dark lines, which could be correlated with the threading defects, and the dislocation network just below the surface, respectively. The SEM results showed that these defects had a deleterious effect on the luminescent and electrical properties of the material in the vicinity of the p‐n junction, and would therefore impair the performance of devices made from these layer structures.
Interoperable and unified multimedia retrieval in distributed and heterogeneous environments (2010)

In this abstract, the research topics of my doctoral thesis will be introduced. These emerged within THESEUS1, in which I work as a third-party funded researcher. The overall aim of my work is to provide unified and interoperable multimedia retrieval in distributed and highly heterogeneous environments. In this case, I am focusing on multimedia databases, multimedia metadata formats, semantic web technologies as well as international standardization (MPEG/JPEG and W3C).
ChemInform Abstract: Synthesis of 2‐Azetidiniminium Salts. Part 1. Diastereoselectivity in Keteniminium Triflate/Imine Cycloadditions. (1997)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.