gebhart/patrepeval huggingface dataset:
Shape-Memory Polymers with Adjustable High Glass Transition Temperatures (2015)

Shape-memory polymers (SMPs) are synthesized with adjustable glass transition temperature (Tg) ranging from 299 to 322 °C, higher than those reported previously. The polyimide containing thermal stable but flexible linkages within the backbone act as reversible phase, and high molecular weight (Mn) is necessary to form physical cross-links as fixed phase of thermoplastic shape-memory polyimide. The critical Mn is 21.3 kg/mol, and the relationship between Mn and Tg is explored. Thermoset polyimides show higher storage modulus and better shape-memory effects than thermoplastic counterparts due to covalent cross-linking, and the effective cross-link density with the influence on their physical properties is studied. The mechanism of high-temperature shape-memory effect of polyimide on the basis of chain flexibility, molecular weight, and cross-link density is proposed, which will benefit further research on high-temperature SMPs.
Geometric validation of self‐gating <i>k</i>‐space‐sorted 4D‐MRI vs 4D‐CT using a respiratory motion phantom (2015)

The k-space self-gated 4D-MRI technique provides a robust method for accurately imaging phase-based target motion and geometry. Compared to 4D-CT, the current 4D-MRI technique demonstrates superior spatiotemporal resolution, and robust resistance to motion artifacts caused by fast target motion and irregular breathing patterns. The technique can be used extensively in abdominal targeting, motion gating, and toward implementing MRI-based adaptive radiotherapy.
Flexible quasi-solid-state planar micro-supercapacitor based on cellular graphene films (2017)

Quasi-solid-state micro-supercapacitors with cellular graphene film as the active material and polyvinyl alcohol/H<sub>3</sub>PO<sub>4</sub>as the gel electrolyte have been fabricated. The 3D porous graphene films not only serve as high performance supercapacitor electrodes, but also provide an abundant ion reservoir for the gel electrolyte.
Rapid Scenario and Risk Analysis for a Complex Gas Field with Large Uncertainties (2004)

Abstract Increasingly, the industry is aware of the need to improve field development planning decisions with more rigorous risk analysis. A key is to have technology and work processes supporting the complex evaluation of projects as a whole, i.e. from subsurface to processing with economics, while preserving physical fidelity and interdependent uncertainties. This paper will illustrate how an integrated stochastic approach with scenario analysis, sensitivity analysis, and Monte Carlo simulation assisted an asset team to understand overall project uncertainties and sensitivities for a large gas project. This understanding gave a better basis for the planning decisions. The richness and speed of the integrated stochastic approach is compared with more conventional case study analysis. The latter requires manual iteration to investigate how variations of input variables as e.g. reservoir properties impact reserves and production. It is followed by manual input to the economic model and manual analysis. Outputs presented from hundreds of simulations from the integrated stoachastic approach include distributions and histograms of original fluids in place, cumulative production, plateau period, net present value, production rate, discounted cash flows, and rates of return etc. Correlation coefficients between input uncertainties and output uncertainites indicate which input uncertainties give the major contribution to the output uncertainties. This helps the asset team to focus on the important factors for major decisions, and use less time on the less important issues.
HEROIC: homomorphically EncRypted one instruction computer (2014)

As cloud computing becomes mainstream, the need to ensure the privacy of the data entrusted to third parties keeps rising. Cloud providers resort to numerous security controls and encryption to thwart potential attackers. Still, since the actual computation inside cloud microprocessors remains unencrypted, the opportunity of leakage is theoretically possible. Therefore, in order to address the challenge of protecting the computation inside the microprocessor, we introduce a novel general purpose architecture for secure data processing, called HEROIC (Homomorphically EncRypted One Instruction Computer). This new design utilizes a single instruction architecture and provides native processing of encrypted data at the architecture level. The security of the solution is assured by a variant of Paillier's homomorphic encryption scheme, used to encrypt both instructions and data. Experimental results using our hardware-cognizant software simulator, indicate an average execution overhead between 5 and 45 times for the encrypted computation (depending on the security parameter), compared to the unencrypted variant, for a 16-bit single instruction architecture.
Fatty acid development in a soybean mutant with high stearic acid (1985)

Abstract The fatty acid composition of developing soybean ( Glycine max [L.] Merrill) seeds was evaluated in the mutant line, A6, and its parent, FA8077. Seeds of both lines were harvested at 2‐day intervals from 15 to 39 days after flowering (DAF) and at 4‐day intervals from 39 DAF until maturity. Significant differences between the two lines were observed for stearic and oleic acid percentages at 19 DAF. The maximum difference between the lines was at 25 DAF, when A6 had 45.4% and FA8077 had 4.1% stearic acid. The increase in stearic acid percentage in A6 was accompanied by a decrease in oleic acid to 16.8% at 25 DAF, compared with 53.7% oleic acid for FA8077. The two lines did not differ in development of palmitic, linoleic and linolenic acids. The protein and oil content of mature seeds were similar for the two lines.
Whole Field 3D Internal Strain Distribution in a Composite Beam Under Three-Point Bent (2015)

In this paper we present a new technique that can map the whole field 3D information of internal deformation of composites. The technique, called Digital Volumetric Speckle Photography (DVSP) is an extension of the 2D version developed by the senior author and his colleagues in 1993 called Digital Speckle Photography (DSP) or Computer Aided Speckle Interferometry (CASI). DVSP requires the use of an X-ray Micro CT to record a volume image of the object. Appropriate algorithm using 3D FFT is developed to process the data. As a demonstration we apply the technique to mapping the internal strain field of a composite beam under three-point bending load. Strain distribution in three transverse sections and two longitudinal sections of the beam are fully mapped. It should be noted that the technique can calculate the strain field in any section of the specimen and as many sections as needed. It is a truly whole field technique.
Interface structure and phase of epitaxial SrTiO3 (110) thin films grown directly on silicon (2005)

The interface structure and phase between SrTiO3 (110) on Si (100) have been investigated using high-resolution transmission electron microscopy and x-ray photoelectron spectroscopy. The SrTiO3∕Si interface was found to be epitaxially crystallized without any amorphous oxide layer. The formation of Sr silicate at the interface was suggested by considering the fact of the core-level spectra of the Si 2p, O 1s, and Sr 3d. Our results suggest that the presence of a coincident site lattice at the interface between Si and a Sr silicate and/or SrTiO3 may help to stabilize SrTiO3 in the epitaxial orientation reported in the work.
Self‐Processing, Diffusion‐Based Photopolymers for Holographic Applications (2010)

Abstract The new photopolymers for holographic applications described herein are based on a cross‐linked matrix in which the holographic grating is formed by photo‐polymerization of guest monomers in an interference pattern of the recording light. Diffusion of monomer, triggered by this photo‐polymerization, from the dark to the bright fringes of the interference pattern is the key parameter for creating high modulation in refractive index Δn during hologram recording. This leads to bright visual volume holograms with high diffraction efficiency. The holographic photopolymers are self‐processing. After recording the hologram only (incoherent) light exposure is necessary to bleach the final product and fix the hologram. Unlike earlier photopolymers used in holography, these new materials offer the advantages of no chemical or thermal processing combined with low shrinkage and detuning. Additionally, due to good light sensitivity the formation of the holograms is fast and the film obtained after curing is highly transparent, which makes the material suitable for both, reflection and transmission holography.
In the eighties French project for fission molybdenum-99 production (1993)

In 1985, French Atomic Energy Commission decided to implant on the site of Saclay a production unit of fission Molybdenum-99 for supplying ORIS with this isotope for medical applications. A structure of project has been created where the Department of Radioactive Engineering was committed to define and entire new process of reprocessing of uranium in view of production of 2000 Ci {sup 99}Mo per week involving particularly severe work constraints. The production unit working in semi-automatic has been never permitted to operate in active. This article focuses mainly on the RD the head-end a dissolution of the irradiated {sup 235}U/Al targets in sulfuric acid, warranting the keeping iodine in iodide and tellurium at elementary state permitting in this way their easy elimination as Te(0) and AgI, in respect to the safety constraints; the purification of molybdenum with the tributlyaceto-hydroxamine (TBAH), extractant of an exceptional affinity for Mo, used in chromatographic extraction allowing the direct extraction (with yields close to 1) of this element from the dissolution solution relieved of iodine and tellurium and without uranium extraction.
Piezoelectrically tuned short-cavity dye-laser design (1984)

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text A. J. Cox and Gary W. Scott, "Piezoelectrically tuned short-cavity dye-laser design," Appl. Opt. 23, 1135-1137 (1984) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Multiscale Edge Detection and Fiber Enhancement Using Differences of Oriented Means (2007)

We present an algorithm for edge detection suitable for both natural as well as noisy images. Our method is based on efficient multiscale utilization of elongated filters measuring the difference of oriented means of various lengths and orientations, along with a theoretical estimation of the effect of noise on the response of such filters. We use a scale adaptive threshold along with a recursive decision process to reveal the significant edges of all lengths and orientations and to localize them accurately even in low-contrast and very noisy images. We further use this algorithm for fiber detection and enhancement by utilizing stochastic completion-like process from both sides of a fiber. Our algorithm relies on an efficient multiscale algorithm for computing all "significantly different" oriented means in an image in O(N log rho), where N is the number of pixels, and p is the length of the longest structure of interest. Experimental results on both natural and noisy images are presented.
Fcγ Receptor Polymorphisms (1999)

Two decades ago, seminal studies from the National Institute of Health identified impairment of in vivo Fc receptor specific function in patients with systemic lupus erythematosus (SLE) (1). Further work demonstrated that this receptor dysfunction correlated with immune complex levels measured by complement-independent assays (2), varied with disease activity both within individual patients and across patient cohorts (2–5), and also occurred in patients with various types of immune complex disease (6,7). Efforts to understand the molecular basis of these findings accelerated with the cloning of eight distinct genes, grouped in three highly homologous families, for human Fcγ receptors. Through intrinsic differences in each gene and through alternative splicing, these genes yield 10 or so distinct protein products (8–14).
Isolation, characterization, and chromosomal localization of human brain cDNA clones coding for the precursor of the amyloid of brain in Alzheimer's disease, Down's syndrome and aging. (1987)

Four clones have been isolated from the adult human brain cDNA library using an oligonucleotide probe corresponding to the first 20 amino acids of the brain amyloid polypeptide. The open reading frame of the sequenced clone coded for the known full amino acid sequence of the brain amyloid polypeptide. The 3 kb messenger RNA has been detected in a variety of tissues from human and many nonhuman species. The gene is highly conserved in evolution and has been mapped on human chromosome 21.
New electrochromic thin-film materials (1992)

New transition metal oxyhydroxides containing one or two metals such as W, Nb and Ti have been recently synthetized by "soft chemistry". All these materials have a crystal structure that allows further ionic insertion reactions. Moreover, the reduction of W<sup>6+</sup>, Nb<sup>5+</sup> and Ti<sup>4+</sup> during electrochemical insertion may lead to a colored material. For these reasons, the electrochromic properties of thin films of some of these oxyhydroxides, obtained by vacuum evaporation from bulk materials, have been investigated. This presentation will describe the method of preparation of thin films obtained from H<sub>2</sub>Ti<sub>3</sub>O<sub>7</sub>, HNbWO<sub>6</sub>, H<sub>2</sub>0 and from mixtures of these two metal oxyhydroxides. Their composition are determined. The electrochromic properties in aqueous acid electrolyte and in lithium electrolyte will be presented and compared to those of amorphous W0<sub>3</sub> films. It will be shown that the coloration efficiency of these films may be improved by coevaporating mixtures of two oxyhydroxides. Moreover, the presence of Ti and Nb in the films has been shown to be directly connected to the nature of the oxyhydroxides precursors.
Buffer insertion with adaptive blockage avoidance (2002)

Buffer insertion is a fundamental technology for VLSI interconnect optimization. Several existing buffer insertion algorithms have evolved from van Ginneken's classic algorithm. In this work, we extend van Ginneken's algorithm to handle blockages in the layout. Given a Steiner tree containing a Steiner point that overlaps a blockage, a local adjustment is made to the tree topology that enables additional buffer insertion candidates to be considered. This adjustment is adaptive to the demand on buffer insertion and is incurred only when it facilitates the maximal slack solution. This approach can be combined with any performance-driven Steiner tree construction. The overall time complexity has linear dependence on the number of blockages and quadratic dependence on the number of potential buffer locations. Experiments on several large nets confirm that high-quality solutions can be obtained through this technique with little CPU cost.
Dental non-linear image registration and collection method with 3D reconstruction and change detection (2017)

The capability of a software algorithm to automatically align same-patient dental bitewing and panoramic x-rays over time is complicated by differences in collection perspectives. We successfully used image correlation with an affine transform for each pixel to discover common image borders, followed by a non-linear homography perspective adjustment to closely align the images. However, significant improvements in image registration could be realized if images were collected from the same perspective, thus facilitating change analysis. The perspective differences due to current dental image collection devices are so significant that straightforward change analysis is not possible. To address this, a new custom dental tray could be used to provide the standard reference needed for consistent positioning of a patient’s mouth. Similar to sports mouth guards, the dental tray could be fabricated in standard sizes from plastic and use integrated electronics that have been miniaturized. In addition, the x-ray source needs to be consistently positioned in order to collect images with similar angles and scales. Solving this pose correction is similar to solving for collection angle in aerial imagery for change detection. A standard collection system would provide a method for consistent source positioning using real-time sensor position feedback from a digital x-ray image reference. Automated, robotic sensor positioning could replace manual adjustments. Given an image set from a standard collection, a disparity map between images can be created using parallax from overlapping viewpoints to enable change detection. This perspective data can be rectified and used to create a three-dimensional dental model reconstruction.
Growth Factors and Corneal Epithelium (1987)

Regeneration of corneal epithelium following injury is essential for visual rehabilitation. A limited number of approaches are available for treating patients who fail to heal epithelial injuries adequately. The presence of specific receptors for epidermal growth factor (EGF) on epithelial cells suggests that this potent mitogen may play a role in normal epithelial wound healing. Topical application of biosynthetic human EGF significantly accelerated epithelial regeneration in primates following epikeratophakia surgery. Epidermal growth factor alone and with fibronectin accelerated epithelial regeneration of rabbits following mild alkali burns. Since prolonged exposure of cells to EGF is necessary to induce mitosis, the dynamics of EGF in the eye and with various lenses was studied. When applied in methylcellulose-based eye drops, 90% of the EGF was lost from tear film within 10 min, while a small amount (10%) remained associated with conjuctival tissue. Soft contact lenses or epikeratophakia lenticles took up substantial amounts of EGF (50 micrograms) and released 85% of the EGF within 24 h, with a half-life of 4 h in vitro. Epidermal growth factor did not diffuse through corneas or lenticles and did not promote epithelial downgrowth along sutures in primate corneas. These results suggest that biosynthetic growth factors may be useful in the treatment of some epithelial injuries.
One‐Step Process for Creating Triple‐Shape Capability of AB Polymer Networks (2008)

Abstract Triple‐shape polymers can move from a first shape (A) to a second shape (B) and from there to a third shape (C), where both shape changes are induced by temperature increases. This triple‐shape capability is obtained for multiphase polymer networks after application of a complex thermomechanical programming process, which consists of two steps; these steps create shapes (B) and (A), while shape (C) is defined by the covalent crosslinks of the polymer network. Here, the creation of the triple‐shape capability for an AB polymer network system by a simple one‐step process similar to a conventional dual‐shape programming process is reported. The polymer networks are based on poly( ε ‐caprolactone) (PCL) and poly(cyclohexyl methacrylate); favorable compositions for obtaining a triple shape effect have a PCL content between 35 and 60 wt%. This finding substantially facilitates handling of the triple‐shape technology and is an important step toward the realization of potential applications in which more than one shape change is required.
Frequency-Domain Power Delivery Network Self-Characterization in FPGAs for Improved System Reliability (2018)

Modern field-programmable gate arrays (FPGAs) operate at a core voltage around 1 V and therefore even small voltage fluctuations lead to timing violations and logic errors. The power delivery network (PDN) between the voltage regulator and the FPGA core must be carefully designed to achieve a low output impedance over a broad range of frequencies. Simulation tools are commonly used to estimate the impedance, however, they do not account for aging, component variations, and inaccurate modeling of parasitic elements, all of which lead to PDN design deviation. In this paper, two schemes are presented: first, to extract the dc resistance in the power delivery path, and second, to identify the high impedance frequency band(s) in the PDN. The embedded impedance extraction tool is synthesized within the FPGA load, in coordination with a mixed-signal current-mode dc-dc converter. A new self-calibrated carry-chain-based analog-to-digital converter (CC-ADC) is used for high-speed sampling of the core voltage. The proposed schemes are demonstrated on an Intel Cyclone IV FPGA board. Real-time IR-drop compensation is shown to eliminate logic errors in an finite impulse response filter application. It is also shown that the fail/pass map of a crossbar application matches well with the extracted impedance profile versus voltage and frequency. By modifying the PDN based on the extracted results, the voltage operating range and reliability of the crossbar application are greatly extended.
High-frequency magnetic microstrip local bandpass filters (2005)

This paper presents results for a compact, local bandpass filter. We fabricated the filter using two different ferromagnetic materials, Fe and NiFe, in a microstrip geometry. The different values of saturation magnetization of the two ferromagnets give rise to different gyromagnetic resonance frequencies and provide a local bandpass region between them. The results show that the center frequency of the filter can be tuned over a wide range by adjusting the magnitude of the bias magnetic field. The filter’s bandwidth is almost constant (3.5±0.5GHz) over the entire tuning frequency range (6–26GHz). Theoretical calculations are in good agreement with the experimental results.
Design and Preparation of Ni-Co Bimetallic Nanocatalyst for Carbon Dioxide Reforming of Methane (2012)

Catalyst design and preparation for an ultra stable and highly active catalyst for CO2 reforming of CH4 is presented in this work. The objective was to develop a catalyst of inexpensive and commonly available materials that is able to overcome the long standing carbon formation and thermal sintering problems. The catalyst design began with a thorough investigation of the target reaction as well as possible side reactions, followed by the fundamental stoichiometric analysis, thermodynamic analysis, surface reaction mechanism discussion, and ended up with a list of desired properties of the to-be-developed catalyst, suggested catalyst components, and proposed preparation method. Based on the outcome of the design, cheap transition metal nickel (Ni) was proposed for the active metal, a mixture of mangnisium oxide (MgO) and aluminium oxide (Al2O3) was used as support, and other transition metals close to Ni in the periodic table were chosen to modify the properties of the Ni sites. The co-precipitation preparation method was suggested so as to give rise to strong metal-support interaction (MSI) and thus, grow small metal particles in the subsequent catalyst reduction. It turned out that Ni-Co bimetallic catalyst of small metal loading in the frame of MgAlOx perfomed the best in catalyzing a stable and high throughput of syn-gas from the CO2 reforming of CH4. Characterizations indicated that the synergy of Ni and Co, strong SMI, high metal dispersion, nano-scale particle sizes, and formation of spinel-type thermal stable solid solutions structures, which are ensential to the suppression of carbon formaton and thermal sintering, are made not only with a certain composition of the catalyst but also the catalyst preparation procedures. The latter is even more important.