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Littérature scientifique sur le sujet « Dispersion.11 »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Dispersion.11"

Duru, M., I. Melek, E. Seyfeli, T. Duman, G. Kuvandik, H. Kaya et F. Yalçm. « QTC Dispersion and P-Wave Dispersion during Migraine Attacks ». Cephalalgia 26, n^o 6 (juin 2006) : 672–77. http://dx.doi.org/10.1111/j.1468-2982.2006.01081.x.

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The aim of this study was to investigate increase of QTc dispersion and P-wave dispersion during migraine attacks. Fifty-five patients (16–65 years of age, 49 women, six men) with migraine were included in our study. Heart rate, QTc interval, maximum and minimum QTc interval, QTc dispersion, maximum and minimum P-wave duration and P-wave dispersion were measured from 12-lead ECG recording during migraine attacks and pain-free periods. ECGs were transferred to a personal computer via a scanner and then used for magnification of x400 by Adobe Photoshop software. Maximum QTc interval (454 ± 24 ms vs. 429 ± 23 ms, P < 0.001), QTc interval (443 ± 26 ms vs. 408 ± 22 ms, P <0.001) and QTc dispersion (63 ± 18 ms vs. 43 ± 14 ms, P <0.001) were found significantly higher during migraine attacks compared with pain-free periods. Maximum P-wave duration (107 ± 11 ms vs. 100 ± 11 ms, P <0.001) and P-wave dispersion (45 ± 13 ms vs. 35 ± 13 ms, P <0.001) were found higher during migraine attacks than pain-free periods. We concluded that migraine attacks are associated with increased QTc and P-wave dispersion compared with pain-free periods.

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Carlberg, Raymond G., et Carl J. Grillmair. « Testing for Dark Matter in the Outskirts of Globular Clusters ». Astrophysical Journal 922, n^o 2 (24 novembre 2021) : 104. http://dx.doi.org/10.3847/1538-4357/ac289f.

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Abstract The proper motions of stars in the outskirts of globular clusters are used to estimate cluster velocity dispersion profiles as far as possible within their tidal radii. We use individual color–magnitude diagrams to select high-probability cluster stars for 25 metal-poor globular clusters within 20 kpc of the Sun, 19 of which have substantial numbers of stars at large radii. Of the 19, 11 clusters have a falling velocity dispersion in the 3–6 half-mass radii range, 6 are flat, and 2 plausibly have a rising velocity dispersion. The profiles are all in the range expected from simulated clusters that started at high redshift in a zoom-in cosmological simulation. The 11 clusters with falling velocity dispersion profiles are consistent with no dark matter above the Galactic background. The six clusters with approximately flat velocity dispersion profiles could have local dark matter, but are ambiguous. The two clusters with rising velocity dispersion profiles are consistent with a remnant local dark matter halo, but need membership confirmation and detailed orbital modeling to further test these preliminary results.

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Shehadi, Maher. « Particle dispersion analysis in an 11-row Boeing 767 cabin mockup ». Science and Technology for the Built Environment 25, n^o 7 (19 juin 2019) : 849–57. http://dx.doi.org/10.1080/23744731.2019.1573057.

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Haldar, Susanta, Ramachandran Gnanasekaran et Pavel Hobza. « A comparison of ab initio quantum-mechanical and experimental D0 binding energies of eleven H-bonded and eleven dispersion-bound complexes ». Physical Chemistry Chemical Physics 17, n^o 40 (2015) : 26645–52. http://dx.doi.org/10.1039/c5cp04427h.

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Liu, Ping, Jie Ren et Yuhan Sun. « Synthesis, characterization and catalytic properties of SAPO-11 with high silicon dispersion ». Catalysis Communications 9, n^o 9 (mai 2008) : 1804–9. http://dx.doi.org/10.1016/j.catcom.2008.01.030.

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Zhang, Li Li, Yu Hong Chen et Li Min Qi. « Dispersion Behavior of Silicon Carbide Whisker ». Key Engineering Materials 602-603 (mars 2014) : 114–17. http://dx.doi.org/10.4028/www.scientific.net/kem.602-603.114.

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The dispersion stability of silicon carbide whisker (SiCw) which is by-product of SiC was researched using distilled water as dispersing medium, polyethylene imine (PEI), tetramethylammonium hydroxide (TMAH), poly(meth)acrylamide (PMAM) as the dispersants. The sedimentation and optical microscope technology are used to observe whisker dispersion ，FTIR and ZETA electric potential are used to explore its dispersion mechanism . The results show that the order of dispersion capacity of the dispersant was PEI> TMAH> PMAM.When 1.25vol% PEI was used as dispersant, SiCw can be dispersed homogeneously at pH=9 and 10, in the meanwhile, if TMAH was used, the added amount would be 0.75vol% in which the pH is in range of 11-12.

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André, P. S., Armando Pinto, J. L. Pinto, Rute A. Sá Ferreira, Sonia S. Nobre, P. Monteiro et Luís D. Carlos. « Chromatic Dispersion in Ge-Doped SiO₂-Based Single Mode Fibres due to Temperature Dependence of the Ultraviolet Absorption : Numerical and Experimental Results ». Materials Science Forum 514-516 (mai 2006) : 369–76. http://dx.doi.org/10.4028/www.scientific.net/msf.514-516.369.

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The main information transmission limitation in optical communications employing SiO2 optical fibres is imposed by the optical pulses temporal broadening, resulting from the dispersive properties of the transmission medium (chromatic dispersion). Usually, this dispersion is modelled assuming a -0.4 meV/°C dependence of the 11 eV gap energy. We have monitored the 4.3 eV absorption band, with temperature and obtained a thermal dependence of -0.026 meV/°C. With this value we can predict the first and second order chromatic dispersion for a wavelength of 1550 nm.

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Aghanim, N., Y. Akrami, M. Ashdown, J. Aumont, C. Baccigalupi, M. Ballardini, A. J. Banday et al. « Planck intermediate results ». Astronomy & ; Astrophysics 617 (septembre 2018) : A48. http://dx.doi.org/10.1051/0004-6361/201731489.

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Using the Planck full-mission data, we present a detection of the temperature (and therefore velocity) dispersion due to the kinetic Sunyaev-Zeldovich (kSZ) effect from clusters of galaxies. To suppress the primary CMB and instrumental noise we derive a matched filter and then convolve it with the Planck foreground-cleaned “2D-ILC” maps. By using the Meta Catalogue of X-ray detected Clusters of galaxies (MCXC), we determine the normalized rms dispersion of the temperature fluctuations at the positions of clusters, finding that this shows excess variance compared with the noise expectation. We then build an unbiased statistical estimator of the signal, determining that the normalized mean temperature dispersion of 1526 clusters is 〈(ΔT/T)2 〉 = (1.64 ± 0.48) × 10−11. However, comparison with analytic calculations and simulations suggest that around 0.7 σ of this result is due to cluster lensing rather than the kSZ effect. By correcting this, the temperature dispersion is measured to be 〈(ΔT/T)2〉 = (1.35 ± 0.48) × 10−11, which gives a detection at the 2.8 σ level. We further convert uniform-weight temperature dispersion into a measurement of the line-of-sight velocity dispersion, by using estimates of the optical depth of each cluster (which introduces additional uncertainty into the estimate). We find that the velocity dispersion is 〈υ2〉 = (123 000 ± 71 000) (km s−1)2, which is consistent with findings from other large-scale structure studies, and provides direct evidence of statistical homogeneity on scales of 600 h−1 Mpc. Our study shows the promise of using cross-correlations of the kSZ effect with large-scale structure in order to constrain the growth of structure.

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Tyagi, Preeti, Thomas Schrinner, Steffen Richter, Amiya Ray et Harlad Grossmann. « Factors influencing polymeric granule-assisted dispersion of ultraviolet ink ». January 2017 15, n^o 1 (1 février 2016) : 19–29. http://dx.doi.org/10.32964/tj15.1.19.

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The objective of this research is to identify and evaluate the factors influencing polymeric granuleassisted dispersion of ultraviolet (UV) ink particles. First time, granule-assisted alternative dispersion was observed during adsorption deinking. By optimizing and combining this alternative dispersion process with pulping, we aim to minimize the energy consumption in the dispersion process and thus reduce the environmental impact of the paper recycling process on carbon footprint. For experimental confirmation, a combination of printed paper and polymeric granules was selected such that ink detached from the fibers would not be adsorbed onto the surface of polymeric granules. Factors that affect the mechanical dispersion process were chosen and varied for optimization of the newly developed dispersion method. Results show that at 15% consistency, temperature 45°C, and mass ratio of oven dry pulp and granules of 1:1.5 (200 g pulp and 300 g granules), the granule-assisted dispersion process gives optimum results for reduction of specks size. All experiments were carried out at rotor speed 2 of Hobart pulper (INGEDE Method 11 “Assessment of print product recyclability–Deinkability test”). These optimized parameters are similar to the optimized parameters of adsorption deinking, which give a further option to combine both of the steps (adsorption deinking and granule assisted dispersion) into one. We also demonstrated that the polymeric granule-assisted dispersion method is a viable replacement for the conventional dispersion process by assuring no alteration in fiber length, water retention value of pulp, and strength properties of the handsheets.

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Akamatsu, K., T. Kawamura et S. Deki. « Composition dependence on dispersion of Au/Cu bimetallic nanoparticles in nylon 11 thin films ». European Physical Journal D 16, n^o 1 (octobre 2001) : 305–8. http://dx.doi.org/10.1007/s100530170116.

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Thèses sur le sujet "Dispersion.11"

Mohebi, Mehrdad. « Dispersion of the Nonlinear Refractive Index of CS₂ in the Spectral Range of 9-11 μm ». Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc332448/.

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The nonlinear refractive index (n2) of room temperature liquid CS2 in the wavelength range of 9 to 11 micrometers is measured. A line tunable hybrid C02 TEA laser and amplifier system is used for the experiments. In these measurements the well known photoacoustic method is utilized to observe the onset of whole beam self-focusing. The photoacoustic signal in a CS2 cell, much longer than the confocal parameter, is monitored. The departure of the acoustic signal from linear growth marks the critical power for the onset of nonlinearity. It is experimentally verified that the phenomenon is power dependent as expected from self-focusing theory. The value of n2 is then calculated from the theoretical model of self focusing. Measurements of the on-axis irradiance transmitted through the nonlinear material as well as the measurements of beam distortion are used to verify the validity of the photoacoustic method. In all the measurements the on-axis intensity was smaller than the calculated threshold intensity for stimulated Brillouin scattering. The back reflection was monitored to make sure that stimulated Brillouin scattering was not playing a role in the phenomenon.

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Boaga, Jacopo. « Seismic noise and controlled source surveys : tools for seismic hazard deterministic approach (field measurements in Venice Plain, Italy) ». Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425085.

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The work concerns the study of surface wave dispersion in order to infer shear wave structural model of a Venice Plain area, Italy. Wave dispersion is studied using controlled source survays and seismic noise cross correlation. The study involves also local earthquakes monitoring and HVSR technique. The structural model obtained is used to compute a detrministic hazard seismic scenario of the studied area.

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FRIGERIO, PAOLA. « Biopolymers in elastomers : lignins as biofiller for tyre compound ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2014. http://hdl.handle.net/10281/49989.

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Lignocellulosic biomass is a natural complex composite of cellulose, hemicellulose, lignin, ashes and other soluble substances called extractives. The significant difficulties related to the separation of lignin-carbohydrates complexes are the major obstacle to overcome for lignocellulosic biomass utilization. In order to free the locked polysaccharides in cellulose, a number of lignocellulose pretreatment technologies is under intensive investigations, such as steam explosion, organosolv process, chemical treatment with acids or bases (ammonia, NaOH) and ionic liquid pretreatment. The relevance of lignocellulosic biorefinery relies not only on the recovery of carbohydrates, but also on the added value of lignin which is the second most abundant natural polymer, exceeded only by cellulose and hemicellulose. Lignin’s structure is determined by its botanical origin and the adopted isolation process. Depending on the plant source, lignins can be divided into three classes: hardwood (angiosperm), softwood (gymnosperm) and annual plant (graminaceous); on the other hand, according to the isolation process, lignins can be divided into two groups: lignin from sulfite process and sulfur free lignin. The latter is receiving increasing attentions because it offers a greater versatility than the former and it can be heat-processed avoiding the irritating odor-release commonly associated with commercial kraft lignin. In addition to cost advantages, annual renewability and huge availability are factors that could promote the use of sulfur-free lignin. Lignin’s structure contains a variety of chemical functional groups that affect its reactivity making it able to meet the needs of industry. It’s worth noting that lignin can be used for several industrial applications owing to its surface-active properties. It has also been applied as a filler in many elastomers (butadienestyrene- butadiene, isoprene-styrene-butadiene; styrenebutadiene) or in natural rubber. Moreover, lignin has shown a high antioxidant efficiency both as it is and in combination with commercial antioxidants. The main purpose of my doctorate has been testing sulfur free lignins (obtained from herbaceous plants as by-products of steam explosion and soda pulping processes) as fillers in rubber compounds in order to evaluate their reinforcement ability and their use as a partial replacement of carbon black. The objective is to realize lighter tyres characterized by a low rolling resistance and a reduced amount of material derived from no renewable sources. Lignin has some disadvantages that make its application as a rubber-reinforcing filler difficult, such as large particle size, strong polar surface and high tendency of its particles to link together by intermolecular hydrogen bonding arranging agglomerates. To improve the interaction between filler and elastomer, two strategies have been adopted: the chemical modification of lignin and the reduction of the size of its particles. Concerning the chemical modification, lignin can be functionalized by way of esterification, etherification, reaction with coupling agents (silane) and with hexamethylenetetramine (HMT), so that also its dispersion in the elastomer is improved. Instead, spray drying and the co-precipitation of latex with lignin have proved to be effective in reducing the particles’s size. All the products obtained have been characterized by IR, 31P NMR, GPC and microscope analysis and tested in rubber compounds as it is or as partial replacement of carbon black.

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Gil-Díaz, Teba. « Comportement biogéochimique d’antimoine (Sb) et de tellure (Te) dans le milieu côtier : vers des scénarios de dispersion des radionucléides de Sb et de Te en cas de rejets accidentels de centrales nucléaires (projet AMORAD, ANR-11-RSNR-0002) ». Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0004/document.

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Antimoine (Sb) et tellure (Te), sont des contaminants peu étudiés (isotopes stables) et leurs radionucléides artificiels peuvent être rejetés dans le milieu aquatique lors des accidents nucléaires. La connaissance de leurs comportements biogéochimiques respectifs est nécessaire à l'évaluation du risque radiologique post-accidentel.Ce travail présente des données originales sur le comportement biogéochimique de Sb et de Te dans les systèmes de transition continent-océan, tels que l'estuaire de la Gironde et la rivière du Rhône. Un suivi de 14 ans et des campagnes océanographiques dans le bassin versant de l’estuaire de la Gironde ont permis d’identifier des concentrations, des flux, et des réactivités (variabilités spatio-temporelles et distribution solide/liquide) plus élevés pour Sb que pour Te, mettant en évidence un comportement additif pour Sb et de soustraction pour Te le long des gradients de salinité et de turbidité estuariennes. Des expériences couplant l’adsorption d’isotopes marqués sur des matières en suspension (MES) et des extractions sélectives des phases porteuses, suggèrent que les formes apportées de Sb et de Te sont plus mobiles et potentiellement plus biodisponibles que leurs équivalents naturels. De plus, l’observation de la bioaccumulation non-négligeable de Sb et de Te naturels dans les huîtres sauvages à l’embouchure de l’estuaire permet d’envisager une absorption potentielle de leurs homologues radioactifs.Ainsi, le développement de scenarios de dispersion de radionucléides rejetés dans les zones de transition dépendra (i) de la position géographique de la source (Rhône) et/ou de la zone de turbidité maximale (ZTM; système fluvio-estuarien de Gironde), (ii) de la situation hydrologique pendant et post accident, ainsi que (iii) de la réactivité biogéochimique et des temps de demi-vies des radionucléides. Les premiers scénarios de dispersion de radionucléides dans l'estuaire de la Gironde suggèrent (i) un transport préférentiel de Sb dissous vers la zone côtière, et (ii) une forte rétention de Te radioactif dans la ZTM si la dernière est présente en aval du site d’accident, impliquant le risque de migration saisonnière de la radioactivité vers la ville de Bordeaux pendant l’étiage suivant. Ainsi, la dynamique intra estuarienne (marée, débit et migration de la ZTM) sera le facteur prédominant dans le devenir de Te radioactif, depuis son rejet jusqu’à sa désintégration complète en iode radioactif. L’ensemble de ce travail met en évidence la nécessité d’une évaluation plus approfondie de la radiotoxicité potentielle de Sb et Te lors de leurs rejets en milieu aquatique
Antimony (Sb) and tellurium (Te) are relatively uncommon contaminants (stable isotopes) and may form short-lived fission products (radionuclides) released into the environment during nuclear power plants accidents. Little is known about their respective biogeochemical behaviours, necessary for general contamination studies and post-accidental radiological risk assessment.This work provides original knowledge on Sb and Te biogeochemical behaviour in highly dynamic continent-ocean transition systems: the Gironde Estuary and the Rhône River. Concentrations, spatial/temporal variations, solid/liquid partitioning (Kd), and fluxes are studied from long-term records at the watershed scale. Four estuarine sampling campaigns during contrasting hydrological conditions show higher Sb solubility and Te particle affinity in the estuary than in the upstream fluvial reaches. Historical records (1984-2017) in wild oysters from the estuary mouth do not show clear trends of past or recent contamination, but measurable bioaccumulation suggests that potential uptake of radionuclides is likely to occur. Combined adsorption experiments using isotopically-labelled (spiked) Sb and Te, and subsequent selective extractions of carrier phases from suspended particulate matter (SPM) suggest that spiked Sb and Te are more mobile and potentially bioaccessible than their environmental (inherited) equivalents. Radiotracer adsorption experiments using environmentally representative concentrations of both Gironde and Rhône systems underpin that highly soluble elements may show contrasting reactivity between inherited and spiked forms.Radionuclide dispersion will greatly depend on (i) the geographical position of the source (Rhône) and/or the maximum turbidity zone (MTZ; Gironde fluvial-estuarine system), (ii) the succession of hydrological situations during and after the accident, and (iii) the biogeochemical reactivity and half-lives of the radionuclides. First scenarios on hypothetical dissolved radionuclide dispersion in the Gironde Estuary suggest (i) low sorption of Sb to the SPM, implying a transport of radionuclides in dissolved phase towards the coast, and (ii) high retention of Te within the MTZ, especially for accidental releases during flood conditions, linking the fate of radioactive Te to long estuarine SPM residence times (1-2 years). Potential upstream migration of Te radionuclides in the MTZ towards the city of Bordeaux during the following summer season and Te decay into radioactive iodine warrants further evaluation of the associated potential radiotoxicity

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QUADRI, ROBERTO. « HASPIN ROLE IN VESICLE DELIVERY AND POLARITY DISPERSION ». Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/457676.

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The atypical protein kinase haspin is conserved in all eukaryotes and promotes the correct alignment of chromosomes on the metaphase plate by recruitment of the CPC. Here, using budding yeast as a model organism, we identified new functions for haspin paralogues (Alk1 and Alk2) in regulating actin and nuclear dynamics. Indeed, we show that haspin mutants experiencing mitotic delays accumulate actin and elongate their spindles entirely in daughter cells, with the consequence of generating anucleated mothers and binucleated daughters that are not vital. These defects are due to a hyperaccumulation of polarity proteins at the bud tip and indeed dispersion of these polarity factors or restoration of their physiological localization reduces the severity of the defects of haspin lacking cells. We also demonstrate that haspin regulates polarisome dispersion by affecting the distribution of Cdc42 activity in cells, particularly regulating the localization of Cdc24, the Cdc42 GEF. We report that localization of this GEF is regulated by Ras in mitosis and that haspin regulates the localization of Ras. We also noticed that loss of haspin causes a polarized delivery of exocytic vesicles towards the bud tip that could explain the defective localization of Ras in alk1∆alk2∆ cells. Moreover, we identified Fab1 kinase as a putative interactor of Alk2 and provide evidences for a interplay between haspin and Fab1 complex.

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Liu, Ping. « Structural, Kinetic and Mutational Analysis of Two Bacterial Carboxylesterases ». Digital Archive @ GSU, 2007. http://digitalarchive.gsu.edu/biology_diss/26.

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The crystal structures of two thermostable carboxylesterase Est30 and Est55 from Geobacillus stearothermophilus were determined to help understand their functions and applications in industry or medicine. The crystal structure of Est30 was determined at 1.63 Å resolution by the multiple anomalous dispersion method. The two-domain Est30 structure showed a large domain with a modified alpha/beta hydrolase core including a seven, rather than an eight-stranded beta sheet, and a smaller cap domain comprising three alpha helices. A 100 Da tetrahedral ligand, propyl acetate, was observed to be covalently bound to the side chain of Ser94 in the catalytic triad. This ligand complex represents the first tetrahedral intermediate in the reaction mechanism. Therefore, this Est30 crystal structure will help understand the mode of action of all enzymes in the serine hydrolase superfamily. Est55 is a bacterial homologue of the mammalian carboxylesterases involved in hydrolysis and detoxification of numerous peptides and drugs and in prodrug activation. Est55 crystals were grown at pH 6.2 and pH 6.8 and the structures were determined at resolutions of 2.0 and 1.58 Å respectively. Est55 folds into three domains, a catalytic domain, an α/β domain and a regulatory domain. This structure is in an inactive form; the side chain of His409, one of the catalytic triad residues, is pointing away from the active site. Moreover, the adjacent Cys408 is triply oxidized and lies in the oxyanion hole, which would block the entry of substrate to its binding site. This structure suggested a self-inactivation mechanism, however, Cys408 is not essential for enzyme activity. Mutation of Cys408 showed that hydrophobic side chains at this position were favorable, while polar serine was unfavorable for enzyme activity. Both Est30 and Est55 were shown to hydrolyze the prodrug CPT-11 into the active form SN-38. Therefore, Est30 and Est55 are potential candidates for use with irinotecan in cancer therapy. The catalytic efficiency (kcat/Km) of Est30 is about 10-fold lower than that of Est55. The effects of the Cys408 substitutions on Est55 activity differed for the two substrates, p-NP butyrate and CPT-11. Mutant C408V may provide a more stable form of Est55.

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Kleckner, Ian Robert. « Thermodynamic, Kinetic, and Dynamics Studies of the Allosteric Ligand-Responsive Regulatory Protein TRAP ». The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313460041.

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Choi, Yeonsik. « Novel functional polymeric nanomaterials for energy harvesting applications ». Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/282877.

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Polymer-based piezoelectric and triboelectric generators form the basis of well-known energy harvesting methods that are capable of transforming ambient vibrational energy into electrical energy via electrical polarization changes in a material and contact electrification, respectively. However, the low energy conversion efficiency and limited thermal stability of polymeric materials hinder practical application. While nanostructured polymers and polymer-based nanocomposites have been widely studied to overcome these limitations, the performance improvement has not been satisfactory due to limitations pertaining to long-standing problems associated with polymeric materials; such as low crystallinity of nanostructured polymers, and in the case of nanocomposites, poor dispersion and distribution of nanoparticles in the polymer matrix. In this thesis, novel functional polymeric nanomaterials, for stable and physically robust energy harvesting applications, are proposed by developing advanced nanofabrication methods. The focus is on ferroelectric polymeric nanomaterials, as this class of materials is particularly well-suited for both piezoelectric and triboelectric energy harvesting. The thesis is broadly divided into two parts. The first part focuses on Nylon-11 nanowires grown by a template-wetting method. Nylon-11 was chosen due to its reasonably good ferroelectric properties and high thermal stability, relative to more commonly studied ferroelectric polymers such as polyvinylidene fluoride (PVDF) and polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE)). However, limitations in thin-film fabrication of Nylon-11 have led to poor control over crystallinity, and thus investigation of this material for practical applications had been mostly discontinued, and its energy harvesting potential never fully realised. The work in this thesis shows that these problems can be overcome by adopting nanoporous template-wetting as a versatile tool to grow Nylon-11 nanowires with controlled crystallinity. Since the template-grown Nylon-11 nanowires exhibit a polarisation without any additional electrical poling process by exploiting the nanoconfinement effect, they have been directly incorporated into nano-piezoelectric generators, exhibiting high temperature stability and excellent fatigue performance. To further enhance the energy harvesting capability of Nylon-11 nanowires, a gas -flow assisted nano-template (GANT) infiltration method has been developed, whereby rapid crystallisation induced by gas-flow leads to the formation of the ferroelectric δʹ-phase. The well-defined crystallisation conditions resulting from the GANT method not only lead to self-polarization but also increases average crystallinity from 29 % to 38 %. δʹ-phase Nylon-11 nanowires introduced into a prototype triboelectric generator are shown to give rise to a six-fold increase in output power density as observed relative to the δʹ-phase film-based device. Interestingly, based on the accumulated understanding of the template-wetting method, Nylon-11, and energy harvesting devices, it was found that thermodynamically stable α-phase Nylon-11 nanowires are most suitable for triboelectric energy generators, but not piezoelectric generators. Notably, definitive dipole alignment of α-phase nanowires is shown to have been achieved for the first time via a novel thermally assisted nano-template infiltration (TANI) method, resulting in exceptionally strong and thermally stable spontaneous polarization, as confirmed by molecular structure simulations. The output power density of a triboelectric generator based on α-phase nanowires is shown to be enhanced by 328 % compared to a δʹ-phase nanowire-based device under the same mechanical excitation. The second part of the thesis presents recent progress on polymer-based multi-layered nanocomposites for energy harvesting applications. To solve the existing issues related to poor dispersion and distribution of nanoparticles in the polymer matrix, a dual aerosol-jet printing method has been developed and applied. As a result, outstanding dispersion and distribution. Furthermore, this method allows precise control of the various physical properties of interest, including the dielectric permittivity. The resulting nanocomposite contributes to an overall enhancement of the device capacitance, which also leads to high-performance triboelectric generators. This thesis therefore presents advances in novel functional polymeric nanomaterials for energy harvesting applications, with improved performance and thermal stability. It further offers insight regarding the long-standing issues in the field of Nylon-11, template-wetting, and polymer-based nanocomposites.

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GALLI, MARTINA. « YEAST HASPIN KINASE REGULATES MITOTIC CELL CYCLE EVENTS : FROM G2/M TRANSITION TO POLARISOME DISPERSION ». Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/532121.

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Haspin is a serine/threonine atypical kinase that phosphorylates histone H3-T3 during metaphase, promoting the recruitment of the chromosomal passenger complex (CPC) at kinetochores. Haspin depletion leads to cell arrest in mitosis and prevents proper chromosome positioning at the metaphase plate. Saccharomyces cerevisiae genome encodes for two haspin paralogues ALK1 and ALK2. We recently showed that these genes are essential to coordinate polarization and cell cycle progression, ensuring the correct positioning of several polarity factors following a transient mitotic delay. The aim of this project is to identify new processes where haspin kinase is involved. The first part of this work shows that Alk1 has a role at the G2/M transition in S. cerevisiae. These findings constitute the first evidence for Alk1-specific functions that are not shared by its paralogue Alk2. Our results indicate that cells lacking ALK1 are sensitive to Latrunculin A and complete nuclear division within the unbudded mother cells. These observations pointed toward a defect in the morphogenesis checkpoint. We also observed that in absence of ALK1 the Cdc28-Y19 phosphorylation signal decreases significantly during a morphogenetic stress. Exploring the underlying mechanism, we found that the decrease in phosphorylation is caused by a misregulation in Mih1 phosphatase activity in absence of Alk1. Therefore in budding yeast Alk1 modulates G2/M cell cycle switch by regulating Mih1 3 activity. The second part of this work is focused on exploring the role of Alk1 and Alk2 in polarisome dispersion. We show that the previously reported role of haspin in polarization relies on its ability to modulate Ras localization. Our observations are indicative for a mitotic role of Ras, which, by regulating Cdc24 redistribution, influences Cdc42 activation at polarized sites. These observations may help to shed light on alterations in cell polarity, which often constitute the molecular mechanism for cancer insurgence.

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Sousa, Keliny Martins de Melo. « Modelos lineares generalizados e modelos de dispersão aplicados à modelagem de sinistros agrícolas ». Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-16032010-163501/.

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O presente trabalho tem por objetivo utilizar a abordagem dos modelos lineares generalizados e os modelos de dispersão no contexto do seguro agrícola. Os modelos lineares generalizados (MLG\'s) constituem uma extensão dos modelos lineares de regressão múltipla introduzida por Nelder e Wedderburn (1972), que inclui modelos cuja variável resposta pertence à família exponencial de distribuições. O MLG é formado por um componente aleatório, que possui distribuição pertencente à família exponencial, um componente sistemático, conectados por uma função de ligação. Jorgensen (1997) estende a utilização dos MLG para uma classe mais ampla de modelos probabilísticos, denominados modelos de dispersão. A estimação dos parâmetros foi baseada no método da máxima verossimilhança, e também, em função da amostra ser relativamente pequena, optou-se pelo método de bootstrap não-paramétrico. As duas abordagens foram aplicadas a dois conjuntos de dados de sinistros de 15 municípios do estado do Rio Grande do Sul. Os resultados mostraram que a precipitação acumulada tem influência na ocorrência de sinistros. Entretanto, na modelagem do montante do sinistro não foi encontrada nenhuma variável significativa. Usando o método de bootstrap, foi encontrada influência das variáveis precipitação acumulada e a temperatura média no numero de sinistros
The main objective of this work is to use the generalized linear models and dispersion models in the agricultural insurance context. The Generalized Linear Model (GLM) are an extension of the multiple regression linear models presented by Nelder e Wedderburn (1972). This approach include situations in which the response variable can be included in exponencial the family. The GLM is composed of a randomized component, a sistematic component and the link functions. JÁrgensen (1997) extend the application of the GLM for a more general class of probability models, called dispersion models. Both approaches were applied in two insurance datasets for 15 citys in Rio Grande do Sul. The parameters estimation was based in the maximum likelihood method, in addition, because of the relatively small sample, the non-parametric Bootstrap method was used. This study show, using GLM, that only the accumulated rainfall was statistically significant . However, any of the covariates was significant when modelling the amount of claims. In the analysis using Bootstrap method the accumulated rainfall and average temperature were significant when modelling the number of insurance clains.

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Livres sur le sujet "Dispersion.11"

Hall, R. C. Dispersion of releases of hazardous materials in the vicinity of buildings : Phase 11 - CFD modelling. Sudbury : HSE Books, 1997.

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Michigan State University. African Diaspora Research Project. International Advisory Committee. Creating a paradigm and research agenda for comparative studies of the worldwide dispersion of African peoples : Proceedings of the International Advisory Committee of the African Diaspora Research Project, November 9-11, 1988. East Lansing, Mich. (W-142 Owen Graduate Center, Michigan State University, East Lansing 48824) : The Project, 1990.

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Chapitres de livres sur le sujet "Dispersion.11"

Morita, R., T. Kondo, N. Ogasawara, S. Umegaki et R. Ito. « Dispersion of the Second-Order Nonlinear Optical Coefficient d 11 of Organic Crystal 2-Methyl-4-Nitroaniline ». Dans Springer Proceedings in Physics, 202–5. Berlin, Heidelberg : Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-93426-1_29.

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Biswas, Samarendra Kumar, Umesh Mathur et Swapan Kumar Hazra. « Dispersion of Gases and Vapors ». Dans Fundamentals of Process Safety Engineering, 297–326. Boca Raton : CRC Press, 2021. http://dx.doi.org/10.1201/9781003107873-11.

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Mudenda, Dale, et Lawrence Edwards. « Tariffs and intranational retail price dispersion ». Dans Inequality in Zambia, 181–211. London : Routledge, 2021. http://dx.doi.org/10.4324/9781003241027-11.

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Patra, Aditya Kumar, et Satya Prakash Sahu. « Spatiotemporal Dispersion of Particles in the Vicinity of an Opencast Mine in India ». Dans Bow Ties in Process Safety and Environmental Management, 199–210. Boca Raton : CRC Press, 2021. http://dx.doi.org/10.1201/9781003140382-11.

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« 11. ABOUT is dispersion ». Dans Word Power : Phrasal Verbs and Compounds. Berlin, New York : Mouton de Gruyter, 2003. http://dx.doi.org/10.1515/9783110197235.180.

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« 11. Regularities of Dispersion ». Dans Reflections on Time and Politics, 115–20. Penn State University Press, 2008. http://dx.doi.org/10.1515/9780271056593-013.

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« 11. Pigment dispersion and the role of surfactants in wetting ». Dans Industrial Applications II, 221–44. De Gruyter, 2017. http://dx.doi.org/10.1515/9783110578997-012.

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Kuhn, Mary. « “Wild Only Like Myself” : Thoreau at Home with Plants ». Dans Dispersion. Bloomsbury Academic, 2021. http://dx.doi.org/10.5040/9781501370618.ch-11.

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Pierre, Julien. « Chapitre 11. Le régime de la dispersion : quand les notifications s'invitent dans la vie privée ». Dans L'économie de l'attention, 191–203. La Découverte, 2014. http://dx.doi.org/10.3917/dec.citto.2014.01.0191.

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« - Hydrodynamic Dispersion ». Dans Environmental Transport Phenomena, 176–93. CRC Press, 2014. http://dx.doi.org/10.1201/b17930-11.

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Actes de conférences sur le sujet "Dispersion.11"

Asaki, Melanie, Chung-Po Huang, Dennis M. Garvey, Jianping Zhou, Howard Nathel, Henry C. Kapteyn et Margaret Mary Murnane. « 11 femtosecond pulses from a modelocked Ti:sapphire laser ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.pd17.

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Spielmann, Ch, A. Stingl, R. Szipöcs et F. Krausz. « 11 fs pulse generation from a Ti:sapphire laser without using intracavity prisms ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1993. http://dx.doi.org/10.1364/oam.1993.pdp.13.

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The generation of highly stable optical pulses as short as 11 fs from a Kerr-lens mode-locked Ti:S laser using specific dielectric mirrors as the source of broadband negative dispersion is demonstrated.

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Spielmann, Ch, A. Stingl, F. Krausz et R. Szipöcs. « Chirped multilayer mirrors for dispersion control of femtosecond pulses ». Dans The European Conference on Lasers and Electro-Optics. Washington, D.C. : Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.cmj2.

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Standard femtosecond self-mode-locked oscillators contain a pair of Brewster-angled prisms for producing a net negative group-delay dispersion (GDD) in the resonator. Prism pairs have been widely used for intracavity dispersion control in dye systems and adopted for the new generation of solid-state short-pulse lasers. Extensive theoretical and experimental research revealed that cubic phase dispersion introduced by the intracavity prism pair is the dominant factor limiting the minimum achievable pulse width in ultrafast solid state lasers. This finding prompted search for prism materials exhibiting low cubic phase error and led to the construction of fused-silica-prism-controlled Ti:sapphire lasers,1 which are capable of generating pulses down to 11/s in duration.2

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Guan Yali, Gong Yangdong, Jiang Zhongao et Jian Shuisheng. « A novel design of dual-mode fiber for dispersion compensation based on the LP/sub 11/ mode ». Dans Proceedings of APCC/OECC'99 - 5th Asia Pacific Conference on Communications/4th Optoelectronics and Communications Conference. IEEE, 1999. http://dx.doi.org/10.1109/apcc.1999.820527.

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Schriefl, Andreas J., Peter Regitnig, David M. Pierce et Gerhard A. Holzapfel. « Layer-Specific Distributed Collagen Fiber Orientations in Human Arteries, From Thoracic Aorta to Common Iliac ». Dans ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53403.

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We use the well established method of polarized microscopy on picrosirius red stained tissue samples and a dispersion model to quantify over 37000 measured layer-specific 3D fiber orientations of 11 human thoracic and abdominal aortas and common iliac arteries. Our results yield mean fiber directions, quantitative dispersion data and the existence of two distinct and prominent fiber families for all layers of the aortic wall.

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Forghieri, Fabrizio, Alan H. Gnauck, Robert W. Tkach, Andrew R. Chraplyvy et Richard M. Derosier. « Repeaterless Transmission of 8 10-Gb/s Channels over 137 km (11 Tb/s-km) of Dispersion-Shifted Fiber ». Dans Optical Fiber Communication Conference. Washington, D.C. : OSA, 1994. http://dx.doi.org/10.1364/ofc.1994.pd26.

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Kitayama, Y., et S. Tanaka. « Length dependence of LP 11 Mode Cutoff And Its Influence On The Chromatic Dispersion Measurement By Phase Shift Method ». Dans 1985 International Technical Symposium/Europe, sous la direction de Remy Bouillie. SPIE, 1986. http://dx.doi.org/10.1117/12.951001.

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Serkin, V. N., et V. A. Vysloukh. « Blue self-frequency shift of femtosecond optical solitons ». Dans Nonlinear Guided-Wave Phenomena. Washington, D.C. : Optica Publishing Group, 1993. http://dx.doi.org/10.1364/nlgwp.1993.tub.14.

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The effect of Raman self-scattering or the red self-frequency shifting of the soliton spectrum is one of the fundamental nonlinear effect in fibers [1-8]. Experimental and theoretical investigations of this effect have been carried out up to now in standard fibres using the traditional approximation of the NSE. This approximation corresponds to spectral-homogeneous dependence of GVD on frequency. However, even the first experiments with dispersion-shifted and erbium-doped fibres [8-11] and the theoretical works on femtosecond soliton propagation in fibers with potential barrier-like shaped dispersion [12,13] pointed to the possibility of new effects.

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Stravato, A., V. Mochalin, S. C. Picardi et R. Knight. « HVOF Sprayed Nylon-11/Nanodiamond Composite Coatings : Production & ; Characterization ». Dans ITSC2008, sous la direction de B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima et G. Montavon. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2008. http://dx.doi.org/10.31399/asm.cp.itsc2008p0625.

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Abstract High velocity oxy-fuel (HVOF) combustion spraying has previously been shown to be a viable method for depositing polymer and polymer/ceramic composite coatings. The addition of hard particulate reinforcing phases to soft polymeric matrices should improve their durability and wear performance. Nano-sized diamond is an ideal reinforcing phase, owing to its high hardness and desirable thermal properties. Composite coatings comprising a Nylon-11 matrix reinforced with nanodiamonds have been successfully produced by HVOF. An important challenge is preserving the structure of the nanoparticles after thermal spray deposition and achieving a uniform dispersion of them within the polymeric matrix. Raman spectroscopy and X-ray diffraction confirmed the presence and retention of nanodiamonds after HVOF deposition. Understanding of the role of variables including the % loading of reinforcing phase in the matrix and powder preparation route are necessary. The coatings exhibited improved sliding wear resistance in macromechanical tests. Nanoindentation studies demonstrated an improvement in deformation behavior and recovery of the HVOF nanodiamond Nylon-11/nanodiamond composites subjected to deformation.

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Gale, G. M., F. Hache et M. Cavallai. « Ultrabroadband Parametric Amplification in the Visible ». Dans The European Conference on Lasers and Electro-Optics. Washington, D.C. : Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cwh1.

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A general non-collinear geometric condition for broadband femtosecond parametric amplification (known as tangential phase-matching in the nanosecond regime) has recently been exploited to produce 13 fs pulses in the visible from an optica! parametric oscillator [1] and less than 11 fs from a single-stage optical parametric amplifier [2]. These results will be compared to detailed numerical simulations of the parametric process and it will be shown that pulse duration is limited by third- and higher order dispersion This opens up the possibility for the generation of significantly sub-10 fs pulses in the visible by use of mirror dispersion controlled systems.

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Rapports d'organisations sur le sujet "Dispersion.11"

Patrick Matthews. Corrective Action Decision Document for Corrective Action Unit 366 : Area 11 Plutonium Valley Dispersion Sites Nevada National Security Site, Nevada, Revision 0. Office of Scientific and Technical Information (OSTI), septembre 2012. http://dx.doi.org/10.2172/1056667.

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Patrick Matthews. Corrective Action Investigation Plan for Corrective Action Unit 366 : Area 11 Plutonium Valley Dispersion Sites, Nevada National Security Site, Nevada, Revision 0. Office of Scientific and Technical Information (OSTI), septembre 2011. http://dx.doi.org/10.2172/1028467.

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Closure Report for Corrective Action Unit 366 : Area 11 Plutonium Valley Dispersion Sites, Nevada National Security Site, Nevada. Office of Scientific and Technical Information (OSTI), décembre 2013. http://dx.doi.org/10.2172/1118629.

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Corrective Action Plan for Corrective Action Unit 366 : Area 11 Plutonium Valley Dispersion Sites, Nevada National Security Site, Nevada. Office of Scientific and Technical Information (OSTI), avril 2013. http://dx.doi.org/10.2172/1079484.

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