gebhart/patrepeval huggingface dataset:
Conceptual Design of a Communication-based Deep Space Navigation Network (2012)

As the need grows for increased autonomy and position knowledge accuracy to support missions beyond Earth orbit, engineers must push and develop more advanced navigation sensors and systems that operate independent of Earth-based analysis and processing. Several spacecraft are approaching this problem using inter-spacecraft radiometric tracking and onboard autonomous optical navigation methods. This paper proposes an alternative implementation to aid in spacecraft position fixing. The proposed method Network-Based Navigation technique takes advantage of the communication data being sent between spacecraft and between spacecraft and ground control to embed navigation information. The navigation system uses these packets to provide navigation estimates to an onboard navigation filter to augment traditional ground-based radiometric tracking techniques. As opposed to using digital signal measurements to capture inherent information of the transmitted signal itself, this method relies on the embedded navigation packet headers to calculate a navigation estimate. This method is heavily dependent on clock accuracy and the initial results show the promising performance of a notional system.
ChemInform Abstract: STRUCTURAL STUDIES ON POLYNUCLEAR OSMIUM CARBONYL HYDRIDES. 22. CRYSTAL STRUCTURE AND CARBON‐13 NMR SPECTRA OF (μ‐H)2OS3FE(CO)13 (1982)

Abstract Die Titelverbinrltlng wird durch eine 1:2‐mo1are Umsetzung des Triosmiumcltisters (1) mit dem Fe‐curbonyl (II) erstmalig in einer hohen Ausb. synthetisiert und mittels 13 C‐NMR‐Spektroskopie sowie EinkristalI‐Röntgendiffraktionsmesstmgen charakterisiert.
Development of an Efficient Hot Mix Asphalt Fracture Mechanics-Based Crack Growth Simulator (2003)

Development of an Efficient Hot Mix Asphalt Fracture Mechanics-Based Crack Growth Simulator
Search for the rare radiative decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi><mml:mo>→</mml:mo><mml:mi>π</mml:mi><mml:mi>γ</mml:mi></mml:math>in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math>collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>1.96</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:math> (2012)

We present a search for the rare radiative decay ${W}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\gamma}$ using data corresponding to an integrated luminosity of $4.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of proton-antiproton collisions at a center-of-mass energy of 1.96 TeV collected by the CDF experiment at Fermilab. As no statistically significant signal is observed, we set a 95%-confidence-level upper limit on the relative branching fraction $\ensuremath{\Gamma}({W}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\gamma})/\ensuremath{\Gamma}({W}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{e}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\nu})$ at $6.4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$, a factor of 10 improvement over the previous limit.
Experimental Studies on the Catalytic Distillation for Hydrolysis of Methyl Acetate (2001)

In this paper, the feasibility of applying catalytic distillation for the hydrolysis of methyl acetate is studied experimentally. An optimum technological process for the hydrolysis is determined, based on experimental results and mathematical simulations. The methyl acetate conversion can be greatly increased, and the energy consumption reduced, for certain operation conditions via the catalytic distillation process.
Structural and Electronic Transport Properties in Sr-Doped BiCuSeO (2012)

We report on the structural and electronic transport properties of BiCuSeO based compounds, that have recently been reported as promising thermoelectric materials with figure of merit ZT > 0.8 at 923 K, and share the same crystal structure as the high-Tc iron based 1111 oxypnictides. We show that the substitution of Bi3+ by Sr2+ induces a strong decrease of the electrical resistivity up to the solubility limit reached for x = 0.35, which originates from the strong increase of the carriers concentration. Two anomalies in the resistivity curves have been observed, one for the undoped compound near 260 K and the other for the doped samples at very low temperature. However, structural and magnetic measurements do not provide indications of structural or magnetic phase transition or superconductivity as it had been previously suggested in BiCu1–xOS. We show that the thermoelectric properties of Bi1–xSrxCuSeO materials can be well understood through the analysis of the electronic band structure and the density of states close to the Fermi level and we provide possible directions toward the enhancement of the thermoelectric figure of merit of these materials.
First Field Demonstration of Network Function Virtualization via Dynamic Optical Networks with OpenContrail and Enhanced NOX Orchestration (2013)

An overlay network function virtualization framework that utilizes dynamic optical substrate as the underlay network is demonstrated via field networks. On-demand bandwidth provisioning is allowed by the combination of OpenContrail and enhanced NOX.
Studies on the adoption of CFD codes in the analysis of stability in heated channels with supercritical fluids (2012)

The paper addresses the issue of the prediction of flow stability in heated channels containing supercritical water by the use of computational fluid-dynamics techniques. The long term aim of the research is to qualify a methodology for analyzing stability by CFD codes, basing on previous preliminary experience by the FLUENT code and making use of the present capabilities of the STAR-CCM+ code. The effect of using first and second order schemes with different time-step size for a simple thermal-hydraulic problem is firstly checked, mainly making use of the implicit transient coupled scheme available in STAR-CCM+; this step was required in order to clarify the effect of truncation error that in such implicit schemes is predicted to be quite large. Then, the analysis progresses considering a more realistic bundle slice, including the fluid and the fuel rod, with UO2, cladding and gap regions, simplified only by neglecting the effects of spacer grids and inlet throttling, to be addressed in a later phase of the research. The coupling with a point kinetics model, obtained by using an external program, developed in java, is also parametrically assessed. Conclusions are finally drawn on the observed numerical effects, sketching the lines for further research on this topic.
Ion Implanted MOSFET's With Very Short Channel Lengths (2007)

Ion implantation allows the fabrication of very small MOSFET switching devices with considerably thicker gate insulators. Capacitance from the source and drain to the substrate and to the gate is reduced by more than a factor of two compared to conventional structures. Conversely, for a given thickness, smaller devices can be achieved using ion implantation.
Jet nebulization of budesonide suspension into a neonatal ventilator circuit: Synchronized versus continuous nebulizer flow (1997)

To determine the dose of inhaled budesonide suspension in the treatment of preterm infants with ventilator-dependent lung disease, we measured the dose of nebulized budesonide delivered through an endotracheal tube (ETT), using a test lung and filters. The effect of delivering the nebulized aerosol to two different locations in the same ventilatory circuit was evaluated. In addition, a new synchronized jet nebulizer was tested. The median drug delivery to the test lung was 0.3% (range, 0-0.4%) of the nominal dose when the nebulizer activated by continuous gas flow was inserted into the inspiratory line of the circuit. Drug delivery could be increased to 0.7% (range, 0.5-0.8%) by delivering the nebulizer output directly to the ETT. When using the synchronized jet nebulizer, drug delivery was 1.1% (range, 0.8-1.6%). The particle size of aerosol emerging from the ETT was 2.14 microns. The nebulization time with the synchronized nebulizer set-up was 38 min, while the other set-ups delivered an equal volume of solution in 6-7 min. Drug delivery of 0.3-1.1% to the test lung illustrates the problems encountered in aerosol treatment of intubated neonates. We conclude that the delivery of budesonide to the test lung can be increased by delivering the nebulizer output to the ETT directly. Using synchronized nebulization during inspiration only can achieve further increases in drug delivery, and wastage of drug during expiration is decreased. Synchronized nebulization may, therefore, have an important place in the delivery of expensive aerosolized drugs.
Changes in the Exciton-Related Photoluminescence of 4H- and 6H-SiC Induced by Uniaxial Stress (1998)

Changes in the exciton-related photoluminescence of 4H- and 6H-SiC induced by uniaxial stress
Long-term wavelength stability of 1.55-μm tunable distributed Bragg reflector lasers (1999)

To investigate physical mechanisms involved in long-term wavelength drift of tunable distributed Bragg reflector (DBR) laser, the evolution of the tuning characteristics as well as the Bragg section intensity modulation response of several DBR lasers have been simultaneously assessed by current injection in the Bragg section only. Current versus voltage I(V) characteristics under aging have also been recorded to compare the role of leakage current and nonradiative recombination defect evolution. The wavelength drift as well as the carrier lifetime of the tuning section varies following an exponential law A+Bexp(-t/sub A///spl tau/) versus aging time t/sub A/. The time constant /spl tau/ is aging temperature and Bragg current dependant. The carrier lifetime decreases with time indicating a wavelength drift mainly due to nonradiative recombination defect increase. Modeling of the I/sub B/(V) and /spl lambda//sub B/(I/sub B/) characteristics is presented, that fits nicely the experimental data. The exponential form of the wavelength drift is used to propose novel and adequate burning conditions of DBR lasers.
Improving Rate Capability of Li-Ion Capacitors Using Nano Graphite Anodes (2017)

Li-ion capacitors are receiving considerable attention as potential energy storage device due to their high power density, high energy density, as well as long cycle life. The energy density of the capacitor is determined by the specific capacitance of high surface area double layer carbon cathodes while the power performance is dependent upon the rate capability of the anode. In this investigation, we demonstrate a high energy density lithium ion capacitor that can be charged and discharged between 2.2V – 4.2V with energy density exceeding 100 Wh/kg based on both the masses of the electrode and discharge time < 1 min can be fabricated. The capacitor was capable of being cycled at 1 A/g with 90% capacitance retention over 5000 cycles. The high voltage stability of the capacitor upto 4.2V was also determined using an accelerated floating voltage tests. The high performance of the capacitor was due to the use of a high purity polymer derived carbon cathode with controlled pore size distribution along with a nanocrystalline prelithated graphite as the anode.
TCDD-Induced Alterations in Gene Expression Profiles of the Developing Mouse Paw Do Not Influence Morphological Differentiation of This Potential Target Tissue (2006)

The aryl-hydrocarbon receptor (AhR) is a ligand-dependent transcription factor that mediates the toxicity of certain halogenated aromatic hydrocarbons including 2,3,7,8-tetra-chlorodibenzo-p-dioxin (TCDD). These compounds are potent developmental toxicants that can alter gene expression and disrupt processes of proliferation and differentiation. It has not yet been determined which tissues during development are most sensitive to these compounds, nor which genes are directly associated with the toxicities. We developed a transgenic (TG) mouse model to delineate the temporal and spatial context of transcriptionally active AhR by utilizing a dioxin responsive element-linked LacZ reporter system. The present study focuses on the pattern of TCDD-induced transgene expression localized to the footpad and digits of the paws between gestational days (GD) 13 and 18. Paw morphology was evaluated at several developmental stages following TCDD exposure. Gene expression profiles acquired by microarray technology were evaluated in the paws of fetuses exposed at GD 14.5. The results showed that TCDD exposure in utero induced LacZ expression in the developing paws. This expression appeared to be localized to the mesenchymal cell layer. Gross morphological changes were not observed in the paws prior to or after birth following TCDD exposure in utero. However, significant alterations in gene expression profiles in the developing paws were observed at 24 h following TCDD exposure in utero. These results indicate that the developing paw is a target tissue of TCDD in terms of altered gene expression, further validating the use of this AhR responsive reporter gene TG mouse model in studying AhR ligand-mediated responsiveness. However, the linkage of these changes to detectable biological outcomes in the paw remains unclear.
Using Specified Risk Materials-Based Peptides for Oil Sands Fluid Fine Tailings Management (2021)

Fluid fine tailings are produced in huge quantities by Canada's mined oil sands industry. Due to the high colloidal stability of the contained fine solids, settling of fluid fine tailings can take hundreds of years, making the entrapped water unavailable and posing challenges to public health and the environment. This study focuses on developing value-added aggregation agents from specified risk materials (SRM), a waste protein stream from slaughterhouse industries, to achieve an improved separation of fluid fine tailings into free water and solids. Settling results using synthetic kaolinite slurries demonstrated that, though not as effective as hydrolyzed polyacrylamide, a commercial flocculant, the use of SRM-derived peptides enabled a 2-3-fold faster initial settling rate than the blank control. The pH of synthetic kaolinite tailings was observed to be slightly reduced with increasing peptides dosage in the test range (10-50 kg/ton). The experiments on diluted fluid fine tailings (as a representation of real oil sands tailings) demonstrated an optimum peptides dosage of 14 kg/ton, which resulted in a 4-fold faster initial settling rate compared to the untreated tailings. Overall, this study demonstrates the novelty and feasibility of using SRM-peptides to address intractable oil sands fluid tailings.
Hydrolysis and Olation of Th(IV) Chelates of Polyaminopolycarboxylic Acids<sup>1</sup> (1958)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrolysis and Olation of Th(IV) Chelates of Polyaminopolycarboxylic Acids1Raymond F. Bogucki and Arthur E. MartellCite this: J. Am. Chem. Soc. 1958, 80, 16, 4170–4174Publication Date (Print):August 1, 1958Publication History Published online1 May 2002Published inissue 1 August 1958https://pubs.acs.org/doi/10.1021/ja01549a014https://doi.org/10.1021/ja01549a014research-articleACS PublicationsRequest reuse permissionsArticle Views99Altmetric-Citations44LEARN 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
Back Cover: Fundamental Properties of Phenylboronic‐Acid‐Coated Gate Field‐Effect Transistor for Saccharide Sensing (ChemElectroChem 10/2014) (2014)

Sweet, sweeter, sweetest! This cover picture shows the possibility of a semiconductor-based field-effect transistor (FET) biosensor for the highly sensitive detection of various saccharides by coating phenylboronic acid (PBA) on the gate sensing surface. We are required to enhance the selectivity of each saccharide detection, but this problem is solved by improving the signal transduction bio/device interface for each saccharid. The PBA-based FET platform will be useful for the convenient and highly sensitive detection of various saccharides in the fields of food engineering and medicine. For more detail see the Full Paper by T. Kajisa and T. Sakata on page 1647 (DOI: 10.1002/celc.201402193).
Perlecan Proteolysis Induces an α2β1 Integrin- and Src Family Kinase-dependent Anti-apoptotic Pathway in Fibroblasts in the Absence of Focal Adhesion Kinase Activation (2006)

Dysregulation of apoptosis in endothelial cells (EC) and fibroblasts contributes to fibrosis. We have shown previously that apoptosis of EC triggers the proteolysis of extracellular matrix components and the release of a C-terminal fragment of perlecan, which in turn inhibits apoptosis of fibroblasts. Here we have defined the receptors and pathways implicated in this anti-apoptotic response in fibroblasts. Neutralizing alpha2beta1 integrin activity in fibroblasts exposed to either medium conditioned by apoptotic EC (SSC) or a recombinant perlecan C-terminal fragment (LG3) prevented resistance to apoptosis and is associated with decreased levels of Akt phosphorylation. Co-incubation of fibroblasts for 24 h with SSC or LG3 in the presence of PP2 (AG1879), a biochemical inhibitor of Src family kinases (SFKs) and focal adhesion kinase, showed a significantly decreased anti-apoptotic response. However, focal adhesion kinase gene silencing with RNA interference did not inhibit the anti-apoptotic response in fibroblasts. Src phosphorylation was increased in fibroblasts exposed to SSC, and transfection of fibroblasts with constitutively active Src mutants induced an anti-apoptotic response that was not further increased by SSC. Also, Src(-/-)Fyn(-/-) fibroblasts failed to mount an anti-apoptotic response in presence of SSC for 24 h but developed a complete anti-apoptotic response when exposed to SSC for 7 days. These results suggest that extracellular matrix fragments produced by apoptotic EC initiate a state of resistance to apoptosis in fibroblasts via an alpha2beta1 integrin/SFK (Src and Fyn)/phosphatidylinositol 3-kinase (PI3K)-dependent pathway. In the long term, additional SFK members are recruited for sustaining the anti-apoptotic response, which could play crucial roles in abnormal fibrogenic healing.
ChemInform Abstract: COOCCURRENCE OF A TERPENOID ISOCYANIDE‐FORMAMIDE PAIR IN THE MARINE SPONGE HALICHONDRIA SP. (1975)

Abstract Von zwei aus Halichondria isolierten Isocyanid‐Formamid‐Paaren ist eines ein bicyclisches Sesquiterpen (80%) und das andere ein Diterpen (20%).
Cobalt‐Catalyzed Alkenylzincation of Unfunctionalized Alkynes (2015)

Abstract While transition metal catalyzed addition reactions of arylmetal reagents to unfunctionalized alkynes have been extensively developed in the last decade, analogous reactions using alkenylmetal reagents remain rare regardless of their potential utility for the synthesis of unsymmetrical 1,3‐dienes. Reported herein is the development of a cobalt/diphosphine catalyst which promotes efficient and stereoselective addition of alkenylzinc reagents to unfunctionalized internal alkynes. The resulting dienylzinc species serve as versatile intermediates for further synthetic transformations.
Fluoro Derivatives of Retinal Illuminate the Decisive Role of the C<sub>12</sub>-H Element in Photoisomerization and Rhodopsin Activation (2009)

Rhodopsin, the visual pigment of the vertebrate rod cell, is among the best investigated members of the G-protein-coupled receptor family. Within this family a unique characteristic of visual pigments is their covalently bound chromophore, 11-cis retinal, which acts as an inverse agonist. Upon illumination it can be transformed into the all-trans isomer that acts as a full agonist. This photoisomerization process is extremely efficient: 2 out of 3 photons are effective, full stereoselectivity is achieved, and stereoinversion occurs within 200 fs. The mechanism behind this process is still not really understood, although the available evidence points at the twisted C(9)-C(13) segment of the 11-cis ligand as the quintessence. To further dissect the role of this segment, we have generated the 10-fluoro, 12-fluoro, and 14-fluoro analogues of rhodopsin. A fluoro substituent brings in only little more volume than hydrogen, but considerably more mass and polarizability. The analogue pigments were compared to rhodopsin with respect to their photosensitivity (quantum yield), light-induced structural transitions (UV-vis and FT-IR spectroscopy), and signaling activity (G protein activation rate). We find that 14-F substitution is quite neutral, while 10-F and 12-F substitutions exert significant but distinct effects. The 10-F pigment exhibits a quantum yield similar to that of rhodopsin (0.65) but strongly perturbed thermodynamics of the structural transitions following photoactivation and only 20% of the native signaling activity. The 12-F pigment exhibits a significantly decreased quantum yield (0.47) and signaling activity (30%) but mixed effects on the structural transitions. These properties are compared to those of the corresponding methyl derivatives. We conclude that rotation of the C(12)-H bond of the rhodopsin chromophore is a major rate-limiting factor in the photoisomerization process, while the C(10)-H moiety plays a dominant role in ligand relaxation and further rearrangements following photoactivation.