gebhart/patrepeval huggingface dataset:
Crystallization and morphology of semicrystalline polyimides (1991)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallization and morphology of semicrystalline polyimidesDaniel P. Heberer, Stephen Z. D. Cheng, Jeffrey S. Barley, Shawn H. S. Lien, Robert G. Bryant, and Frank W. HarrisCite this: Macromolecules 1991, 24, 8, 1890–1898Publication Date (Print):April 1, 1991Publication History Published online1 May 2002Published inissue 1 April 1991https://pubs.acs.org/doi/10.1021/ma00008a029https://doi.org/10.1021/ma00008a029research-articleACS PublicationsRequest reuse permissionsArticle Views510Altmetric-Citations50LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Theoretical and Experimental Investigation of Morphology and Temperature Effects on Adsorption of Organic Vapors in Single-Walled Carbon Nanotubes (2006)

Hexane adsorption on single-walled carbon nanotube (SWNT) bundles is studied by both simulation and experimentally using a previously developed computer-aided methodology, which employed a smaller physisorbed probe molecule, nitrogen, to explore the porosity of nanotube samples. Configurational-bias grand canonical Monte Carlo simulation of hexane adsorption on localized sites of the bundles is carried out to predict adsorption on their external surface and in their internal sites. These localized isotherms are then combined into a global isotherm for a given sample by using knowledge of its tube-diameter distribution and structural parameters, such as the fraction of open-ended nanotubes and the external surface area of bundles in samples, which have been independently determined from the standard nitrogen adsorption isotherm. The near-perfect replication of experimental isotherms demonstrates the validity of our method for structural characterization of SWNT samples. The effect of temperature on adsorption is also studied and the simulation results are extrapolated to predict the limiting hexane adsorption capacity of the samples. The similarity between the hexane adsorption isotherms and those of other organic molecules demonstrates that the adsorption mechanisms explored here are not specific to hexane, and that the proposed methodology can be potentially applicable to other sorbates with equal success.
Polymorphisms Identified through Genome-Wide Association Studies and Their Associations with Type 2 Diabetes in Chinese, Malays, and Asian-Indians in Singapore (2009)

SNPs at T2DM susceptibility loci identified through GWAS in populations of European ancestry show similar effects in Asian populations. Failure to detect these effects across different populations may be due to issues of power owing to limited sample size, lower minor allele frequency, or differences in genetic effect sizes.
Multistability analysis of phase locking patterns in a bursting biological neural system (2002)

We quantitatively analyze the multistability of dynamic patterns of a bursting neural system with diffusive coupling. Through effective coupling analysis, we show that the system is not in-phase locking but exhibits various phase locking patterns, each of which corresponds to the stable fixed points of the effective coupling. The simulation proves the validity of the effective coupling method in analyzing the multistability of neural systems which presents complicated dynamic patterns such as bursting.
SoSharP: Recommending Sharing Policies in Multiuser Privacy Scenarios (2018)

Users often share information about others; sometimes this inadvertently violates others' privacy. Thus, here the authors propose SoSharP, an agent-based approach to help users maintain their own and others' privacy by guiding a selection of sharing policies in multiuser scenarios. SoSharP learns incrementally and asks for users' input only when required, reducing users' effort.
Wind‐Based Estimations of Ocean Surface Currents From Massive Clusters of Drifters in the Gulf of Mexico (2019)

Abstract During the Lagrangian submesoscale experiment (LASER), 1,000 drifters were launched to sample the surface ocean flow in the northern Gulf of Mexico. Due to half a dozen strong winter storms, about 40% of the drifters lost their drogue. This unintended situation facilitated documentation of both near‐surface (5 cm) and deeper (60 cm) flows. These depths are relevant to transport of oil spills, as well as marine debris, such as microplastics, a rapidly growing environmental problem. Here, we improve the surface Lagrangian current prediction by combining a state‐of‐the‐art ocean forecast model with wind and wave data. The ocean surface velocities are obtained from the Navy Coordinate Ocean Model at 1‐km horizontal resolution, while the wind and wave fields are from the Unified Wave INterface Coupled Model coupled atmosphere‐wave‐ocean model. Two Lagrangian parameterizations are tested: one is based on Ekman dynamics, and the other directly on the surface winds. LASER data set is then used to assess the performance of these formulations, as a function of wind/wave conditions, as well as geographic region. It is found that incorporation of wind and wave data into the ocean circulation model can lead to major prediction improvement, by reducing the average 2‐day separation from the modeled and real LASER trajectories by a factor ranging from 1.4 to 4.9. This is a significant improvement for applications, where a rapid deployment of assets is needed, such as oil spill response, or other tracking problems.
Synthesis and Crystal Structure of Zeolite RUB-41 Obtained as Calcination Product of a Layered Precursor:  a Systematic Approach to a New Synthesis Route (2004)

Zeolite RUB-41, framework type code RRO, having a new framework structure has been synthesized as a calcination product using a layered silicate, RUB-39, as precursor. The precursor was obtained from hydrothermal synthesis using dimethyldipropylammonium hydroxide as structure directing agent. RUB-41, 18SiO2 per unit cell, crystallizes in the monoclinic space group P2/c with a = 7.345(1) Å, b = 8.724(1) Å, c = 17.125(1) Å, and β = 114.2(1)°. The material has a 2-dimensional channel system with intersecting 8- and 10-membered ring pores. The pore openings determined from structure analysis are 5.8 Å × 4.1 Å (8MR) and 5.9 Å × 4.1 Å (10MR). The surface area determined from nitrogen adsorption experiments is 510 m2/g and the pore space is accessible for linear molecules. The material shows high sorption interaction for C4 alkenes and excludes i-butane from the pore system.
Beauveria bassiana (Balsamo) Vuillemin (Deuteromycetes) Applied to Laboratory Colonies of Solenopsis invicta Buren (Hymenoptera: Formicidae) in Soil (1993)

Laboratory experiments were done to evaluate effects of a Beauveria bassiana (Balsamo) Vuillemin, strain on Brazilian and American populations of Solenopsis Invicta Buren. Three application methods used for treatment of fire ants were sprinkling material on the soil surface, injection into the nest, and mixing conidia into soil. Two hundred grams of B. bassiana-rice material was applied on colonies with ≈7 g of ants in plastic pots with nest soil. Mortality of ants treated with B. bassiana and infection of cadavers were significantly higher than in the control during the first 3 wk of the experiments in the United States and in Brazil. No differences were observed in susceptibility of the S. invicta populations to B. bassiana strain 447 or in the effects of soil on the performance of the fungus. A maximum 70% reduction of the population occurred when colonies with 3 g of ants in 300 g of soil were injected with 0.3 g of a powder formulation containing 50% of B. bassiana conidia. In large colonies with ≈10,000 ants, application of 25 g of formulation (1 part conidia:4 parts diatomaceous earth) by injection into nest or surface treatment caused ant mortality of between 70 and 92%. Application of fungus by mixing conidia into soil did not cause significant mortality of ants. Injection of powder formulation of B. bassiana can be advantageous because better fungus-host contact occurs and lower doses are required.
Optical network design and restoration (2002)

The explosion of data traffic and the availability of enormous bandwidth via dense wavelength division multiplexing (DWDM) and optical amplifier (OA) technologies make it important to study optical layer networking and restoration. This paper is concerned with fast distributed restoration and provisioning for generic mesh-based optical networks. We consider two problems of practical importance: determining the best restoration route for each wavelength demand, given the network topology and the capacities and primary routes of all demands, and determining primary and restoration routes for each wavelength demand to minimize network capacity and cost. The approach we propose for both problems is based on precomputing. For each problem, we describe specific algorithms used for computing routes. We also describe endpoint-based failure detection, message flows, and cross-connect actions for execution of fast restorations. Finally, we report test results for large carrier-scale networks that include both the computational performance of the optimization algorithms and the restoration speed obtained by simulation. Our results indicate that subsecond restoration, high capacity efficiency, and scalability can be achieved without fault isolation and with moderate processing. We also discuss methods for scaling algorithms to problems with very large numbers of demands. The wavelength routing and restoration algorithms, the failure detection, and the message exchange and activation architectures we propose are collectively known as WaveStar™ advanced routing platform.
Sourcing thermotolerant poly(ethylene terephthalate) hydrolase scaffolds from natural diversity (2022)

Enzymatic deconstruction of poly(ethylene terephthalate) (PET) is under intense investigation, given the ability of hydrolase enzymes to depolymerize PET to its constituent monomers near the polymer glass transition temperature. To date, reported PET hydrolases have been sourced from a relatively narrow sequence space. Here, we identify additional PET-active biocatalysts from natural diversity by using bioinformatics and machine learning to mine 74 putative thermotolerant PET hydrolases. We successfully express, purify, and assay 51 enzymes from seven distinct phylogenetic groups; observing PET hydrolysis activity on amorphous PET film from 37 enzymes in reactions spanning pH from 4.5-9.0 and temperatures from 30-70 °C. We conduct PET hydrolysis time-course reactions with the best-performing enzymes, where we observe differences in substrate selectivity as function of PET morphology. We employed X-ray crystallography and AlphaFold to examine the enzyme architectures of all 74 candidates, revealing protein folds and accessory domains not previously associated with PET deconstruction. Overall, this study expands the number and diversity of thermotolerant scaffolds for enzymatic PET deconstruction.
Regulation of NF-κB activity through lysinemonomethylation of p65 (2009)

NF-κB is a key activator of inflammatory and immune responses with important pathological roles in cancer, heart disease, and autoimmune diseases. Transcriptional activity of NF-κB is regulated by different posttranslational modifications. Here, we report a novel mechanism of NF-κB regulation through lysine monomethylation by SET9 methyltransferase. Set9 specifically methylates p65 at lysine 37. Both TNFα and IL-1β treatments induced methylation of p65. Methylated p65 is restricted to the nucleus and this modification regulates the promoter binding of p65. Moreover, Set9 mediated methylation of p65 is required for the expression of a subset of NF-κB target genes in response to TNFα stimulation.
Do genome‐scale models need exact solvers or clearer standards? (2015)

Constraint‐based analysis of genome‐scale models (GEMs) arose shortly after the first genome sequences became available. As numerous reviews of the field show, this approach and methodology has proven to be successful in studying a wide range of biological phenomena (McCloskey et al, 2013; Bordbar et al, 2014). However, efforts to expand the user base are impeded by hurdles in correctly formulating these problems to obtain numerical solutions. In particular, in a study entitled “An exact arithmetic toolbox for a consistent and reproducible structural analysis of metabolic network models” (Chindelevitch et al, 2014), the authors apply an exact solver to 88 genome‐scale constraint‐based models of metabolism. The authors claim that COBRA calculations (Orth et al, 2010) are inconsistent with their results and that many published and actively used (Lee et al, 2007; McCloskey et al, 2013) genome‐scale models do support cellular growth in existing studies only because of numerical errors. They base these broad claims on two observations: (i) three reconstructions (iAF1260, iIT341, and iNJ661) compute feasibly in COBRA, but are infeasible when exact numerical algorithms are used by their software (entitled MONGOOSE); (ii) linear programs generated by MONGOOSE for iIT341 were submitted to the NEOS Server (a Web site that runs linear programs through various solvers) and gave inconsistent results. They further claim that a large percentage of these COBRA models are actually unable to produce biomass flux. Here, we demonstrate that the claims made by Chindelevitch et al (2014) stem from an incorrect parsing of models from files rather than actual problems with numerical error or COBRA computations.
Electrodeposition of Aluminum from Aluminum Chloride–Trihexyl(tetradecyl) Phosphonium Chloride (2007)

Ionic liquids (ILs) are solvents of interest for applications such as electroplating, winning, and refining of metals. In this study, the conductivity of the –trihexyl(tetradecyl) phosphonium chloride system was characterized over a wide range of concentration and temperature. Cyclic voltammetry was used to determine the electrochemical window of the neat IL using a Pt substrate. The anodic and cathodic potentiodynamic polarization behavior of Al was measured in at an concentration of fraction . Aluminum was electrodeposited at a constant potential over a range of potentials ; the deposit morphology, current efficiency, and power consumption are provided. The presence and effects of impurities such as and HCl in the ionic liquid are also addressed.
Bifunctional plasmonic metamaterials enabled by subwavelength nano-notches for broadband, polarization-independent enhanced optical transmission and passive beam-steering (2013)

In this work, we present the design, numerical experiments, and analysis of a plasmonic metamaterial thin film based on subwavelength nano-notch loaded modified fishnet structures. The resulting device offers a simultaneous bandpass filtering functionality with a broad enhanced optical transmission window and a gapless negative-zero-positive index transition to enable polarization-independent passive beam-steering. This unique characteristic is made possible by the introduced subwavelength nano-notches, which provide fine tuning and hybridization of the external and internal surface plasmon polariton modes. This allows tailoring of the dispersive properties of the plasmonic metamaterial for broadband operation. Specifically, a multilayer nanostructured modified fishnet with feature sizes accessible by modern nanofabrication techniques is presented, exhibiting a broad passband at the mid-infrared wavelengths from 3.0 to 3.7 µm and stopbands elsewhere in the 2.5 ~4.5 µm window. The transmittance normalized to area is around 3 dB within the broad 20% bandwidth of the passband. Additionally, the effective index undergoes a smooth transition from negative unity through zero to positive unity with low loss within the passband. The physical mechanism and the angular dispersion of the metamaterial are analyzed in detail. Finally, full-wave simulations of a prism formed from this metamaterial are performed to demonstrate that the proposed structure achieves simultaneous polarization-insensitive passive beam-steering and filtering functionalities.
BILATERAL CENTRAL RETINAL ARTERY OCCLUSION IN A PATIENT WITH ACUTE PANCREATITIS (2009)

It is postulated that the resultant complement activation with subsequent leukoembolization along with the combined effect of other variables led to microvascular damage resulting in bilateral central retinal artery occlusion.
Considerations of Design Requirement for a Broadband ATM Network (1991)

We investigate the onsiderations of design issues for a bradband ATM network. Three kimds of network design requirement are considered ; user grade-of-service(GOS) requirements. Network manager requirements, and system designer requirements. In this work, e are focusing on the balancing problems among performance measures. We suggest that design parameters for a bradband ATM echange would be tuned within the acceptable sets by a layering concept on the peformance objectives.
Preliminary analysis of the failure of well EW-05, Visalia Pole Yard, February 1, 1999 (1999)

No abstract prepared.
Patterning of the C. elegans 1° vulval lineage by RAS and Wnt pathways (2000)

In C. elegans, the descendants of the 1 degrees vulval precursor cell (VPC) establish a fixed spatial pattern of two different cell fates: E-F-F-E. The two inner granddaughters attach to the somatic gonadal anchor cell (AC) and generate four vulF cells, while the two outer granddaughters produce four vulE progeny. zmp-1::GFP, a molecular marker that distinguishes these two fates, is expressed in vulE cells, but not vulF cells. We demonstrate that a short-range AC signal is required to ensure that the pattern of vulE and vulF fates is properly established. In addition, signaling between the inner and outer 1 degrees VPC descendants, as well as intrinsic polarity of the 1 degrees VPC daughters, is involved in the asymmetric divisions of the 1 degrees VPC daughters and the proper orientation of the outcome. Finally, we provide evidence that RAS signaling is used during this new AC signaling event, while the Wnt receptor LIN-17 appears to mediate signaling between the inner and outer 1 degrees VPC descendants.
Photobleaching Mechanism in Amorphous Red Phosphorus (1989)

Photobleaching mechanism for amorphous red phosphorus film was discussed from the XPS results obtained here and the phenomenological results reported in part I. XPS spectra of the photobleached film gave two peaks in P-2p; one peak, which appears in the as-sputtered film, is due to P-P bonding, and another peak appearing on illumination is to P-O bonding. Photobleaching observed in this experiment was found to be induced by photo oxidation. Band gap illumination excites the σ-bonding electrons forming P-P bonds. A part of the excited P-P bonds dissociates and reacts with diffusing oxygen from atmosphere to form P-O bonds. The mechanism was considered to be composed of following two stages. In the first stage, a thin layer of phosphorus oxides forms on the surface of the film. The rate of this photo oxidation is controlled by the diffusion of oxygen from atmosphere. A simple experimental relationship between the decrease of the optical film thickness (Δdop) and the illumination time (t), Δdop∝t1/2, is obtained. Although the decrease of the optical thickness is observed in this stage, the film thickness (d) remains unchanged. In the second stage, photobleaching is due to the decrease in the film thickness, which is caused by evaporation of oxide layer; the decreasing rate of d is equal to that of dop.
The NOGO receptor NgR2, a novel αVβ3 integrin effector, induces neuroendocrine differentiation in prostate cancer (2022)

Androgen deprivation therapies aimed to target prostate cancer (PrCa) are only partially successful given the occurrence of neuroendocrine PrCa (NEPrCa), a highly aggressive and highly metastatic form of PrCa, for which there is no effective therapeutic approach. Our group has demonstrated that while absent in prostate adenocarcinoma, the αVβ3 integrin expression is increased during PrCa progression toward NEPrCa. Here, we show a novel pathway activated by αVβ3 that promotes NE differentiation (NED). This novel pathway requires the expression of a GPI-linked surface molecule, NgR2, also known as Nogo-66 receptor homolog 1. We show here that NgR2 is upregulated by αVβ3, to which it associates; we also show that it promotes NED and anchorage-independent growth, as well as a motile phenotype of PrCa cells. Given our observations that high levels of αVβ3 and, as shown here, of NgR2 are detected in human and mouse NEPrCa, our findings appear to be highly relevant to this aggressive and metastatic subtype of PrCa. This study is novel because NgR2 role has only minimally been investigated in cancer and has instead predominantly been analyzed in neurons. These data thus pave new avenues toward a comprehensive mechanistic understanding of integrin-directed signaling during PrCa progression toward a NE phenotype.
Lossless acousto-optic permutation switch (1990)

An innovative acousto-optic interconnection device is proposed that eliminates optical fan-out and fan-in losses suffered by other optical interconnection techniques. This approach allows essentially lossless permutations of about 30 single-mode fiber optic signals in a single integrated optics device, and supports arbitrary modulation formats and bandwidths since optical to electronic conversions are avoided. The reconfiguration time of this acousto-optic interconnection network is given by the aperture time of the Bragg cell and is usually between 100 ns and 10 µ s, which is fast enough for many applications. Surface acoustic wave acousto-optic technology can be efficiently utilized for the space division switching applications with three key advantages. First, almost lossless permutations can be obtained because fanout and fanin losses are avoided. Second, even though N frequencies must be simultaneously applied to the device, an incredibly low rf drive power is required due to a sophisticated utilization of beam steering and phase matching techniques. Finally, an entire switch network is realized on a single integrated optics substrate, and these can be stacked up and combined to implement a novel 3-dimensional folding of a larger Clos network. The design, analysis, applications, and initial experimental verification of the acousto-optic photonic switch concept will be presented.