gebhart/patrepeval huggingface dataset:
Boron‐substituted ZSM‐5 membranes: Preparation and separation performance (2000)

Abstract ZSM‐5 zeolite membranes with boron substituted into the framework for silicon were prepared on porous stainless‐steel and α‐alumina tubular supports. These membranes had higher n‐C 4 H 10 /i‐C 4 H 10 separation selectivities, and effectively separated these isomer mixtures to higher temperatures than membranes with aluminum substituted into the framework. Membranes were prepared with Si/B ratios as low as 12, and the best membranes were prepared from alkali‐free gels. The highest n‐C 4 H 10 /i‐C 4 H 10 permselectivity at 473 K was 60, and the highest at 527 K was 24. For most alkali‐free membranes, the n‐C 4 H 10 /i‐C 4 H 10 permselectivities and separation selectivities increased with boron content, and membranes on α‐alumina supports had both higher permeances and separation selectivities. Membranes with the same permeances and selectivities can be reproducibly prepared, and they are stable at elevated temperatures.
Electronic and Optical Confinement in Semiconductors: Towards Nanoscale Photonic Devices (2004)

The recent advances in semiconductor growth and nanoprocessing allow the control of both electron and photon wavefunctions on the nanoscale. Electronic confinement in 3D nanoislands (quantum dots) leads to complete energy quantization, and provides a solid‐state equivalent to atomic physics. On the other hand, optical confinement in 3D microcavities allows the control of spontaneous emission. This may bring improved performance as well as completely new functionality in semiconductor optical sources (lasers, light‐emitting diodes). This paper reviews the state‐of‐the‐art in the field, with particular emphasis on possible device applications.
An extensive study of the influence of dopants on the ferroelectric properties of HfO<sub>2</sub> (2016)

The ferroelectric properties of hafnium oxide based thin films prepared by chemical solution deposition (CSD) are investigated.
The effect of thermal stresses on the EMI (electromagnetic interference) shielding of conductive plastics (1986)

Abstract The electrical properties of a number of filled and coated plastics were examined after subjecting the materials to rigorous thermal cycling between −20 and 80°C. Filled compounds that obtained their conductivity through the addition of carbon based conductive fillers maintained their conductivity throughout the thermal cycling. Compositions which contained metal fillers were able to maintain their conductivity only when a high temperature thermally stable polymer was used as the polymer matrix. Plaques coated by a zinc arc spray or with acrylic paints containing graphite, silver, and nickel particles were unaffected by thermal cycling. Plaques coated with an acrylic paint containing copper particles lost most of their conductivity during the changes in sample temperature.
Tissue-specific regulation of IL-6 production by IL-4. Differential effects of IL-4 on nuclear factor-<i>kappa</i> B activity in monocytes and fibroblasts. (1993)

IL-4 inhibits production of certain proinflammatory cytokines, including IL-1 beta, TNF-alpha, and IL-6, by activated monocytes. Although monocytes are a major source of IL-6, other cell types such as fibroblasts and endothelial cells can also express this cytokine. To determine whether IL-4 inhibits IL-6 expression in non-hemopoietic cells, we investigated the effects of IL-4 on IL-6 production in both primary human fibroblasts and fibroblast lines. Rheumatoid synovial fibroblasts were evaluated in these studies because, like monocytes, they produce high levels of IL-6 when stimulated with IL-1. Although peripheral blood monocytes did not constitutively express IL-6 mRNA or protein, stimulation with IL-1 or LPS induced de novo IL-6 expression in these cells. In contrast, synovial fibroblasts displayed a significant basal level of IL-6 production, which was markedly increased after stimulation with IL-1. IL-4 suppressed IL-6 expression in monocytes, but did not inhibit IL-6 production in synovial fibroblasts. The inability of IL-4 to suppress IL-6 synthesis in rheumatoid synovial fibroblasts was not caused by a lack of IL-4R and was not unique to these cells because IL-4 also failed to inhibit IL-6 production in normal fibroblast lines derived from other tissues. Inhibition of IL-6 production by IL-4 in monocytes was associated with decreased nuclear NF-kappa B levels. However, IL-4 does not globally suppress the activity of all DNA-binding proteins because IL-4 treatment did not reduce the levels of NF-IL-6 or NF-IL-1 beta B in the same cells. Because NF-kappa B activation is required for transcription of many cytokine genes, including IL-6, the ability of IL-4 to suppress NF-kappa B activity in monocytes suggests a potential mechanism by which this molecule may inhibit the expression of multiple cytokines.
Heterogeneous Catalysis in Acetylation of Alcohols and Phenols Promoted by Zirconium Sulfophenyl Phosphonate (2000)

Abstract Layered zirconium sulfophenyl phosphonate was found to be an efficient heterogeneous catalyst for the acetylation of alcohols and phenols.
Digital Design, Analysis and 3D Printing of Prosthesis Scaffolds for Mandibular Reconstruction (2019)

Segmental mandibular reconstruction has been a challenge for medical practitioners, despite significant advances in medical technology. There is a recent trend in relation to customized implants, made up of porous structures. These lightweight prosthesis scaffolds present a new direction in the evolution of mandibular restoration. Indeed, the design and properties of porous implants for mandibular reconstruction should be able to recover the anatomy and contour of the missing region as well as restore the functions, including mastication, swallowing, etc. In this work, two different designs for customized prosthesis scaffold have been assessed for mandibular continuity. These designs have been evaluated for functional and aesthetic aspects along with effective osseointegration. The two designs classified as top and bottom porous plate and inner porous plate were designed and realized through the integration of imaging technology (computer tomography), processing software and additive manufacturing (Electron Beam Melting). In addition, the proposed designs for prosthesis scaffolds were analyzed for their biomechanical properties, structural integrity, fitting accuracy and heaviness. The simulation of biomechanical activity revealed that the scaffold with top and bottom porous plate design inherited lower Von Mises stress (214.77 MPa) as compared to scaffold design with inner porous plate design (360.22 MPa). Moreover, the top and bottom porous plate design resulted in a better fit with an average deviation of 0.8274 mm and its structure was more efficiently interconnected through the network of channels without any cracks or powder material. Verily, this study has demonstrated the feasibility and effectiveness of the customized porous titanium implants in mandibular reconstruction. Notice that the design and formation of the porous implant play a crucial role in restoring the desired mandibular performance.
Serving dynamic groups in application-level multicast (2005)

We propose an ALM framework for dynamic groups (such as stock-quote application) in this paper, where users may hop from one multicast group to another quite frequently even though the total pool of users in the system may remain quite stable. Our approach efficiently maintains multiple multicast trees for dynamic subsets of end-hosts, and hence is called subset-ALM (SALM). SALM first builds a relatively stable mesh consisting of all end-hosts for control messaging, which is used to efficiently guide the construction of dynamic overlay trees for data multicast. We choose Delaunay triangulation (DT) as an example for mesh formation, and study various tree construction mechanisms based on the degree of embedding of the tree branches in the mesh (embedded, bypass and intermediate trees). Using simulation on Internet-like topologies, we show that SALM achieves low costs in terms of relative delay penalty and physical link stress, even for large multicast groups (in excess of a thousand end-hosts).
High-power microwave generation using optically activated semiconductor switches (1990)

The two prominent types of optically controlled switches, the optically controlled linear (OCL) switch and the optically initiated avalanche (OIA) switch, are described, and their operating parameters are characterized. Two transmission line approaches, one using a frozen-wave generator and the other using an injected-wave generator, for generation of multiple cycles of high-power microwave energy using optically controlled switches are discussed. The point design performances of the series-switch, frozen-wave generator and the parallel-switch, injected-wave generator are compared. The operating and performance limitations of the optically controlled switch types are discussed, and additional research needed to advance the development of the optically controlled, bulk, semiconductor switches is indicated.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Minimum leakage vector computation using weighted partial MaxSAT (2010)

Aggressive scaling of CMOS technology has enabled faster and smaller designs but has posed new challenges. In the deep-submicron era, leakage power has become a major contributor to the overall power dissipation of an IC. In this paper, we present a weighted partial Max-SAT (WPMax-SAT) based approach to find the minimum leakage vector (MLV) of a combinational design. In its exact form, this technique computes the input vector which gives the lowest leakage for a combinational design. For large designs, the exact WPMax-SAT based technique may require large runtimes. Therefore, for such designs, the exact technique is run for a fixed amount of time followed by a guided random search around the best leakage vector computed by the WPMax-SAT solver. We also present a variant of our approach in which the MLV is generated by including the effect of random variations in leakage due to variations in process, voltage and temperature (PVT). Experimental results on ISCAS85 and MCNC91 benchmark circuits show that for larger circuits on average, our method reports a 3.62% improvement in mean, 4.20% improvement in standard deviation and 3.67% improvement in μ + 3*σ leakage of the circuit under PVT variations, compared to a random vector based MLV determination approach (with the same runtime as the random vector based approach).
Stereochemical Analysis of the Enzymic Synthesis and Hydrolysis of Ap<sub>4</sub>A (1991)

Abstract The stereochemical course of synthesis of PlP4-Bis(5′-adenosyl) tetraphosphate (Ap4A) from ATP catalysed by phenylalanyl-tRNA synthetase in the presence of Zn2+ has been shown to proceed with retention of configuration at Pα in accord with the mechanism involving phenylalanyl-adenylate as an intermediate. The hydrolysis of Ap4A by the unsymmetrical Ap4A phosphodiesterase from lupin seeds proceeds with inversion of configuration at Pα indicating that the hydrolysis takes place by a direct 'in line' displacement mechanism.
CopyCatch (2013)

How can web services that depend on user generated content discern fraudulent input by spammers from legitimate input? In this paper we focus on the social network Facebook and the problem of discerning ill-gotten Page Likes, made by spammers hoping to turn a profit, from legitimate Page Likes. Our method, which we refer to as CopyCatch, detects lockstep Page Like patterns on Facebook by analyzing only the social graph between users and Pages and the times at which the edges in the graph (the Likes) were created. We offer the following contributions: (1) We give a novel problem formulation, with a simple concrete definition of suspicious behavior in terms of graph structure and edge constraints. (2) We offer two algorithms to find such suspicious lockstep behavior - one provably-convergent iterative algorithm and one approximate, scalable MapReduce implementation. (3) We show that our method severely limits "greedy attacks" and analyze the bounds from the application of the Zarankiewicz problem to our setting. Finally, we demonstrate and discuss the effectiveness of CopyCatch at Facebook and on synthetic data, as well as potential extensions to anomaly detection problems in other domains. CopyCatch is actively in use at Facebook, searching for attacks on Facebook's social graph of over a billion users, many millions of Pages, and billions of Page Likes.
A 5 GHz, 32 mW CMOS frequency synthesizer with an injection locked frequency divider (2003)

A fully integrated 5 GHz phase locked loop- (PLL-) based frequency synthesizer is designed in a 0.24 /spl mu/m CMOS technology. A voltage-controlled differential injection-locked frequency divider (VCDILFD) is used as the first frequency divider in the PLL feedback loop to reduce power consumption and eliminate the need for an off-chip frequency divider. The total synthesizer power consumption is 32 mW. The phase noise is measured to be -101 dBc/Hz at 1 MHz offset frequency. The PLL bandwidth is 300 kHz and the measured spurious level at the adjacent channel is less than -54 dBc.
Acute Primary Hyperparathyroidism (1987)

No AccessJournal of UrologyMetabolism, Endocrinology and Immunology1 Jul 1987Acute Primary Hyperparathyroidism L.A. Fitzpatrick and J.P. Bilezikian L.A. FitzpatrickL.A. Fitzpatrick More articles by this author and J.P. BilezikianJ.P. Bilezikian More articles by this author View All Author Informationhttps://doi.org/10.1016/S0022-5347(17)43092-8AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail "Acute Primary Hyperparathyroidism." The Journal of Urology, 138(1), p. 232 © 1987 by The American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 138Issue 1July 1987Page: 232 Advertisement Copyright & Permissions© 1987 by The American Urological Association Education and Research, Inc.MetricsAuthor Information L.A. Fitzpatrick More articles by this author J.P. Bilezikian More articles by this author Expand All Advertisement PDF downloadLoading ...
Nitric Oxide Release in Response to Gut Injury (1993)

We evaluated nitric oxide release in several models of intestinal inflammation through luminal nitrite concentrations. In anesthetized rabbits, piglets, and guinea pigs, luminal lavages were collected from loops of normal or injured small intestine. Lavages were analyzed spectrophotometrically for nitrite (Griess reagent) and protein. Myeloperoxidase (MPO) content of intestinal segments was used as an index of granulocyte infiltration and intestinal inflammation. Acute ileal inflammation was induced by luminal acetic acid + casein in rabbits and luminal deoxycholate in neonatal piglets and adult rabbits. Chronic ileitis was induced in guinea pigs by intraluminal trinitrobenzenesulfonic acid. In each model nitrite levels in ileal lavages were significantly greater than control loops/animals. Increased luminal protein and intestinal MPO activity paralleled the changes in nitrite levels. To determine whether nitric oxide production influenced mucosal repair, segments of ileum were perfused with the L-arginine antagonist NG-nitro-L-arginine methyl ester (L-NAME, 10 mg/ml) after acute acetic acid + casein exposure. L-NAME administration reversed the decline in epithelial permeability characteristic of epithelial restitution, causing an increase in epithelial permeability which was readily reversible. These results suggest that nitrite production is a useful index of gut injury and that nitric oxide may contribute to the functional repair of the epithelial barrier under acute conditions.
Color-Multiplexing-Based Fluorescent Test Paper: Dosage-Sensitive Visualization of Arsenic(III) with Discernable Scale as Low as 5 ppb (2016)

Fluorescent colorimetry test papers are promising for the assays of environments, medicines, and foods by the observation of the naked eye on the variations of fluorescence brightness and color. Unlike dye-absorption-based pH test paper, however, the fluorescent test papers with wide color-emissive variations with target dosages for accurate quantification remain unsuccessful even if the multicolorful fluorescent probes are used. Here, we report the dosage-sensitive fluorescent colorimetry test paper with a very wide/consecutive "from red to cyan" response to the presence and amount of arsenic ions, As(III). Red quantum dots (QDs) were modified with glutathione and dithiothreitol to obtain the supersensitivity to As(III) by the quenching of red fluorescence through the formation of dispersive QDs aggregates. A small amount of cyan carbon dots (CDs) with spectral blue-green components as the photostable internal standard were mixed into the QDs solution to produce a composited red fluorescence. Upon the addition of As(III) into the sensory solution, the fluorescence color could gradually be reversed from red to cyan with a detection limit of 1.7 ppb As(III). When the sensory solution was printed onto a piece of filter paper, surprisingly a serial of color evolution from peach to pink to orange to khaki to yellowish to yellow-green to final cyan with the addition of As(III) was displayed and clearly discerned the dosage scale as low as 5 ppb. The methodology reported here opens a novel pathway toward the real applications of fluorescent test papers.
Three‐dimensional structures and contexts associated with recurrent amino acid sequence patterns (1997)

We have used cluster analysis to identify recurring sequence patterns that transcend protein family boundaries. A subset of these patterns occur predominantly in a single type of local structure in proteins. Here we characterize the three-dimensional structures and contexts in which these sequence patterns occur, with particular attention to the interactions responsible for their structural selectivity.
Highly Chemoselective Rhodium-Catalyzed Methylenation of Fluorine-Containing Ketones (2002)

[reaction: see text] The rhodium(I)-catalyzed methylenation of functionalized fluorinated ketones using trimethylsilyldiazomethane proceeds to give the corresponding fluoromethylalkenes in good yields (61-90%). Remarkable chemoselectivity was observed for the synthesis of keto-substituted organofluorine alkenes.
Triangular mesh model reconstruction from scan point clouds based on template (2009)

For mesh reconstruction problems of point cloud models which have similar topological structure, a rapid and efficient method is presented to reconstruct triangular mesh surface. Based on projections of point cloud slicing that correspond to template sectional curves, the method constructs topological relevant information among discrete points, which makes unorganized points ordering and builds up optimal approximated B-spline curve, resamples every curve according to its curvature distribution and performes triangular mesh division on it. Finally, surface reconstruction is achieved. The experimental results demonstrate that the surface reconstruction is done as the point cloud hole is filled simultaneously.
Real-Time Virtual Machines (2008)

This paper tackles the problem of guaranteeing appropriate timeliness guarantees to real-time applications running in a virtualised Operating System. Preliminary experimental results are presented, highlighting how the appropriate use of well-established real-time scheduling strategies may be effective in facing with this challenging issue. 1 Introduction and related work Information and Communications Technologies (ICTs) are moving towards a new generation of business models for service provisioning, where connectivity will represent, for users, only the basic point of access to an infinity of
DNA probe for detection of the Leptospira interrogans serovar hardjo genotype hardjo-bovis (1987)

A DNA probe is described for the diagnostic and taxonomic identification of the North American cattle pathogen Leptospira interrogans genotype hardjo-bovis. The probe is specific for this genotype and does not hybridize to genomic DNA of any other leptospire pathogen commonly found in North America.
A Novel Method for Breeding Polyploid Cells by Heat-induced Endomitotic Diploidization in<i>Saccharomyces cerevisiae</i> (1993)

Endomitotic diploidization occurred as a result of heat treatment of spores during germination of the industrial yeast S. cerevisiae. Polyploid cells were obtained in both heterothallic and homothallic strains. In the heterothallic strains, the resultant diploid cells, with the ability to mate, were used to construct tetraploids. In the homothallic strains, tetraploid cells were obtained directly after a mating-type switch. In each strain, the highest frequency (approximately 10% of viable cells) of diploidization was obtained when spores were cultured for 30 min in liquid medium to initiate germination followed by subsequent heat treatment at 55°C for 10min.
Importance of the Hinge Region between α-Helix F and the Main Part of Serpins, Based upon Identification of the Epitope of Plasminogen Activator Inhibitor Type 1 Neutralizing Antibodies (2000)

The serpin plasminogen activator inhibitor type 1 (PAI-1) is an important protein in the regulation of fibrinolysis and inhibits its target proteinases through formation of a covalent complex. In the present study, we have identified the epitope of two PAI-1 neutralizing monoclonal antibodies (MA-33H1F7 and MA-55F4C12). Based upon differential cross-reactivity data of these monoclonals with PAI-1 from different species and on a sequence alignment between these PAI-1s, combined with the three-dimensional structure, we predicted that the residues Glu(128)-Val(129)-Glu(130)-Arg(131) and Lys(154) (at the hinge region between alpha-helix F and the main part of the PAI-1-molecule) might form the major site of interaction. Therefore a variety of alanine mutants were generated and evaluated for their affinity toward both monoclonal antibodies. The affinity constants of MA-55F4C12 and MA-33H1F7 for PAI-1 were 2.7 +/- 1.6 x 10(9) M(-1) and 5.4 +/- 1.7 x 10(9) M(-1), respectively, but decreased between 13- and 270-fold upon mutation of Lys(154) to Ala(154) or Glu(128)-Val(129)-Glu(130)-Arg(131) to Ala-Ala-Ala-Ala. The combined mutations (PAI-1-EVER/K), however, resulted in an absence of binding to either of the antibodies. Both antibodies bound to PAI-1-wt/t-PA complexes with a similar affinity as to PAI-1-wt (K(A) = 4-5 x 10(9) M(-1)). The epitope localization reveals the molecular basis for the neutralizing properties of both monoclonal antibodies. In addition, it provides new insights into the validity of various models that have been proposed for the serpin/proteinase complex, excluding full insertion of the reactive-site loop.