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Добірка наукової літератури з теми "Apparent volume"

Автор: Grafiati
Опубліковано: 10 лютого 2024

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Статті в журналах з теми "Apparent volume"

1

Repetto, Horacio A., and Roberto Penna. "Apparent Bicarbonate Space in Children." Scientific World JOURNAL 6 (2006): 148–53. http://dx.doi.org/10.1100/tsw.2006.32.

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The amount needed to change the concentration of a solute requires the knowledge of its volume of distribution in the solution. Electrolytes that do not participate in active metabolic reactions have a fixed volume of distribution that corresponds to the volume of water in which they solubilize. Bicarbonate infusion is used to correct hyperchloremic metabolic acidosis. Its volume of distribution (bicarbonate space) changes with its participation in the blood buffer systems. In other words, it is not a fixed physical volume, like that of other solutes. In this paper, we shall review experimental studies that supported evidence for this knowledge and analyze the basic hypothesis to explain the phenomena. Since we have not found clinical studies in children, we shall report our experience in a group of patients with metabolic acidosis treated with bicarbonate infusion in whom apparent bicarbonate space was measured and compared with data in adults from the literature. Guidelines for amount of bicarbonate needed to increase its concentration according to baseline bicarbonate concentration will be suggested.
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2

Kumar, D. "Apparent molar volume of some ω-amino acids in aqueous electrolyte systems". Canadian Journal of Chemistry 77, № 7 (1 липня 1999): 1288–94. http://dx.doi.org/10.1139/v99-117.

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Apparent molar volumes (Vϕ) of some ω-amino acids have been determined in aqueous guanidine hydrochloride (6 m GuHCl) and sodium sulphate (2 m Na2SO4) solutions at 288.15 and 298.15 K using a vibrating tube digital densimeter. The transfer volumes of amino acids from water to aqueous electrolyte systems have been reported. The transfer properties are interpreted in terms of strong interactions, based on a cosphere overlap model of guanidine hydrochloride/sodium sulphate molecules with the charged centers of the zwitterions (amino acid molecules), as compared to ion - nonpolar group interactions.Key words: amino acids, denaturation, guanidine hydrochloride, sodium sulphate, apparent molar volume, zwitterions, limiting apparent molar volume.
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3

Quick, Christopher M., David S. Berger, and Abraham Noordergraaf. "Apparent arterial compliance." American Journal of Physiology-Heart and Circulatory Physiology 274, no. 4 (April 1, 1998): H1393—H1403. http://dx.doi.org/10.1152/ajpheart.1998.274.4.h1393.

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Recently, there has been renewed interest in estimating total arterial compliance. Because it cannot be measured directly, a lumped model is usually applied to derive compliance from aortic pressure and flow. The archetypical model, the classical two-element windkessel, assumes 1) system linearity and 2) infinite pulse wave velocity. To generalize this model, investigators have added more elements and have incorporated nonlinearities. A different approach is taken here. It is assumed that the arterial system 1) is linear and 2) has finite pulse wave velocity. In doing so, the windkessel is generalized by describing compliance as a complex function of frequency that relates input pressure to volume stored. By applying transmission theory, this relationship is shown to be a function of heart rate, peripheral resistance, and pulse wave reflection. Because this pressure-volume relationship is generally not equal to total arterial compliance, it is termed “apparent compliance.” This new concept forms the natural counterpart to the established concept of apparent pulse wave velocity.
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4

Bons, P. "APPARENT EXTENSIONAL STRUCTURES DUE TO VOLUME LOSS." Proceedings of the Estonian Academy of Sciences. Geology 48, no. 1 (1999): 3. http://dx.doi.org/10.3176/geol.1999.1.01.

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5

Alauddin, J., S. Pande, S. C. Mohanta, and M. Alauddin. "Volumetric Properties of Secondary Butanol and Tertiary Butanol in Water and Aqueous Micellar Systems of Sodium Dodecyl Sulphate." Journal of Scientific Research 12, no. 3 (May 1, 2020): 419–29. http://dx.doi.org/10.3329/jsr.v12i3.44614.

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The apparent molal volumes of sec-butanol and t-butanol in water and in aqueous micellar system of sodium dodecyl sulphate have been determined from density measurements at different surfactant concentrations and temperatures. The partial molal volumes of the alcohols in aqueous micellar system at infinite dilution, V20 (mean, mic) were obtained from apparent molal volume data and compared with the corresponding values in aqueous solvent, V20 (mean, aq). The standard partial molal expansibilities, E20 (mean) of the alcohols were evaluated from V20 (mean) data at various temperatures. The transfer apparent molal volumes, ∆φtr0 for the alcohols from water to surfactant-water system are determined from apparent molal volume data. The sign and magnitude of these parameters are used to analyze the location of the solubilizate (alcohols) in the micellar system and the nature of interactions between alcohols and the micellar aggregates.
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6

Greenway, C. V. "Effects of hemorrhage and hepatic nerve stimulation on venous compliance and unstressed volume in cat liver." Canadian Journal of Physiology and Pharmacology 65, no. 11 (November 1, 1987): 2168–74. http://dx.doi.org/10.1139/y87-342.

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Intrahepatic blood volume–pressure relationships were studied using plethysmography to measure hepatic blood volume and a hepatic venous long-circuit to control intrahepatic pressure. In cats anesthetized with pentobarbital or with ketamine–chloralose, hemorrhage (to reduce hepatic blood flow to 60% of control) caused marked reductions in hepatic blood volume and intrahepatic pressure but did not significantly change hepatic blood volume–pressure relationships. We were unable to demonstrate an active reflex venous response to hemorrhage in these preparations, although a large passive response occurred. The volume–pressure relationships in innervated livers were different from those in denervated livers: apparent venous compliance was much greater and apparent unstressed volume was zero or negative. Hepatic nerve stimulation in denervated livers caused a marked decrease in hepatic blood volume at low intrahepatic pressures but failed to alter hepatic blood volumes at high intrahepatic pressures (15 mmHg) (1 mmHg = 133.3 Pa). This resulted in large apparent compliances and apparently negative unstressed volumes, as seen in the innervated livers. Thus blood volume–pressure relationships in innervated livers may not give valid measurements of compliance and unstressed volume. A remarkable feature in all these experiments was the linearity of the relationship between hepatic blood volume and intrahepatic pressure. Exudation of fluid begins at higher intrahepatic pressures in innervated compared with denervated livers.
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7

Cui, Wanjing, Hongfang Hou, Jiaojiao Chen, Yafei Guo, Lingzong Meng, and Tianlong Deng. "Apparent molar volumes of sodium arsenate aqueous solution from 283.15 K to 363.15 K at ambient pressure: an experimental and thermodynamic modeling study." Pure and Applied Chemistry 92, no. 10 (October 25, 2020): 1673–82. http://dx.doi.org/10.1515/pac-2019-1102.

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AbstractDensities of the sodium arsenate aqueous solution with the molality varied from (0.04165 to 0.37306) mol · kg−1 were determined experimentally at temperature intervals of 5 K from 283.15 K to 363.15 K and ambient pressure using a precise Anton Paar Digital vibrating-tube densimeter. The apparent molar volumes (Vϕ), thermal expansion coefficient (α) and partial molar volume $({\bar V_{\rm{B}}})$ were obtained based on the results of density measurement. The 3D diagram of apparent molar volume against temperature and molality as well as the diagram of thermal expansion coefficient and partial molar volume against molality were plotted, respectively. On the basis of the Pitzer ion-interaction equation of apparent molar volume model, the Pitzer single-salt parameters ($(\beta _{{\rm{M,X}}}^{(0)v},\beta _{{\rm{M,X}}}^{(1)v},{\rm{ }}\beta _{{\rm{M,X}}}^{(2)v}{\rm{ and }}C_{{\rm{M,X}}}^v,MX = N{a_3}As{O_4})$ and their temperature-dependent correlation F(i, p, T) = a1 + a2ln(T/298.15) + a3(T – 298.15) + a4/(620 – T) + a5/(T – 227) (where T is temperature in Kelvin, ai is the correlation coefficient) for Na3AsO4 were obtained on account of the least-squares method. Predictive apparent molar volumes agree well with the experimental values, and those results indicate that the single-salt parameters and their relational coefficients of temperature-dependence for Na3AsO4 obtained are reliable.
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8

Zenk, Karin E., Jeffrey Barnes, and Steven Sarandis. "Apparent volume discrepancy among vials of Indocin I.V." American Journal of Health-System Pharmacy 43, no. 4 (April 1, 1986): 874–78. http://dx.doi.org/10.1093/ajhp/43.4.874.

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9

Mehrotra, K. N., and M. Anis. "Apparent molar volume and viscosity of zirconyl soaps." Colloids and Surfaces A: Physicochemical and Engineering Aspects 122, no. 1-3 (April 1997): 27–32. http://dx.doi.org/10.1016/s0927-7757(96)03822-8.

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10

Casolla, Barbara, Gregory Kuchcinski, Maéva Kyheng, Riyad Hanafi, Jean-Paul Lejeune, Didier Leys, Charlotte Cordonnier, and Hilde Hénon. "Infarct Volume Before Hemicraniectomy in Large Middle Cerebral Artery Infarcts Poorly Predicts Catastrophic Outcome." Stroke 51, no. 8 (August 2020): 2404–10. http://dx.doi.org/10.1161/strokeaha.120.029920.

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Background and Purpose: Infarct volumes predict malignant infarcts in patients undergoing decompressive hemicraniectomy (DH) for large middle cerebral artery territory infarcts. The aim of the study was to determine the optimal magnetic resonance imaging infarct volume threshold that predicts a catastrophic outcome at 1 year (modified Rankin Scale score of 5 or death). Methods: We included consecutive patients who underwent DH for large middle cerebral artery infarcts. We analyzed infarct volumes before DH with semi-automated methods on b1000 diffusion-weighted imaging sequences and apparent diffusion coefficient maps. We studied infarct volume thresholds for prediction of catastrophic outcomes, and analyzed sensitivity, specificity, and the area under the curve, a value ≥0.70 indicating an acceptable prediction. Results: Of 173 patients (109 men, 63%; median age 53 years), 42 (24.3%) had catastrophic outcomes. Magnetic resonance imaging b1000 diffusion-weighted imaging and apparent diffusion coefficient infarct volumes were associated to the occurrence of 1-year catastrophic outcome (adjusted odds ratio, 9.17 [95% CI, 2.00–42.04] and odds ratio, 4.18 [95% CI, 1.33–13.19], respectively, per 1 log increase). The optimal volume cutoff of were 211 mL on b1000 diffusion-weighted imaging and 181 mL on apparent diffusion coefficient maps. The 2 methods showed similar sensitivities and specificities and overlapping area under the curve of 0.64 (95% CI, 0.54–0.74). Conclusions: In patients with large middle cerebral artery infarcts, optimal magnetic resonance imaging infarct volume thresholds showed poor accuracy and low specificity to predict 1-year catastrophic outcome, with different b1000 diffusion-weighted imaging and apparent diffusion coefficient thresholds. In the setting of DH, optimal infarct volumes alone should not be used to deny DH, irrespectively of the method used.
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Дисертації з теми "Apparent volume"

1

Wang, Zhongning. "Apparent and partial molar heat capacities and volumes of aqueous chelating agents, EDTA and NTA." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ36191.pdf.

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2

Salmi, Moncef. "Homogénéisation des composites linéaires : Etude des comportements apparents et effectif." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00766795.

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Les travaux effectués au cours de cette thèse portent principalement sur la construction de nouvelles bornes du comportement effectif des matériaux biphasés de type matrice-inclusions à comportement linéaire élastique. Dans un premier temps, afin d'encadrer le comportement effectif, nous présentons une nouvelle approche numérique, inspirée des travaux de Huet (J. Mech. Phys. Solids 1990 ; 38:813-41), qui repose sur le calcul des comportements apparents associés à des volumes élémentaires (VE) non-carrés construits à partir d'assemblages de cellules de Voronoï, chaque cellule contenant une inclusion entourée de matrice. De tels VE non-carrés permettent d'éviter l'application directe des CL sur les inclusions à l'origine d'une surestimation artificielle des comportements apparents. En utilisant les théorèmes énergétiques de l'élasticité linéaire et des procédures de moyennisation appropriées portant sur les comportements apparents, un nouvel encadrement du comportement effectif est obtenu. Son application au cas d'un composite biphasé, constitué d'une matrice isotrope et de fibres cylindriques parallèles et identiques distribuées aléatoirement dans le plan transverse, conduit à des bornes plus resserrées que celles obtenues par Huet. En nous appuyant sur cette nouvelle procédure numérique, nous avons ensuite réalisé une étude statistique des comportements apparents à l'aide de simulations de type Monté Carlo. Puis, à partir des tendances issues de cette étude statistique, nous avons proposé et mis en œuvre de nouveaux critères de tailles de VER.
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3

Liu, Bing. "Properties Model for Aqueous Sodium Chloride Solutions near the Critical Point of Water." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd1034.pdf.

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4

Ho, Thi Thu Suong. "Développement d'une nouvelle équation d'état applicable aux solutions d'électrolytes." Palaiseau, Ecole polytechnique, 2012. http://www.theses.fr/2012EPXX0006.

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5

Marais, Caroline. "Formation de concrétions calcomagnésiennes par polarisation cathodique associée à la biocalcification et à l’utilisation de matériaux recyclés pour la protection côtière." Electronic Thesis or Diss., La Rochelle, 2023. http://www.theses.fr/2023LAROS020.

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L’objectif de cette étude vise à développer une solution à faible impact environnemental pour la consolidation des zones côtières partiellement immergées. Cette solution, la formation d’un agglomérat calcomagnésien par électrolyse de l’eau de mer, s’appuie d’une part sur l’économie des ressources locales par valorisation des déchets inertes du BTP (granulats recyclés (GR)) ; et d’autre part sur le processus de biominéralisation impliquant l’hydratation du CO2 par l’enzyme anhydrase carbonique (AC) présente chez les bactéries marines prélevées dans le Port de La Rochelle. Trois axes majeurs ont été étudiés pour optimiser la précipitation d’un liant composé de CaCO3 et de Mg(OH)2 (le dépôt calcomagnésien) au sein de l’agglomérat : l’effet de la dissolution des GR dans l’eau de mer, l’application d’une polarisation cathodique via à un écoulement d’eau de mer et l’étude de la bio-précipitation de CaCO3 par piégeage du CO2 (rôle de l’AC) par les souches marines L’écoulement d’eau de mer a permis de former un agglomérat de 200 cm3 en 60 jours, à -500µA/cm², soit une cinétique de croissance de 3 cm3/jr. Une augmentation de 10% de la compacité a été constatée dans le cas d’une grille enfouie (dans les GR) en immersion et en émersion. L’écoulement et la présence des granulats recyclés favorisent la précipitation du CaCO3 sous forme de calcite pour tendre vers un rapport Mg(OH)2/CaCO3 inférieur ou égale à 1, en polarisation continu ou cyclique. La libération excessive des ions calcium et sulfate en solution liée à la dissolution de la matrice cimentaire contenue au sein des GR, peut expliquer l’augmentation de CaCO3. Toutes les souches ont bio-précipité du CaCO3 dans leur milieu optimal et en présence d’eau de mer naturelle. Leur production a drastiquement chuté avec une teneur à 3% en CO2 (CO2 atmosphérique =0,4%) ainsi qu’en présence de lixiviat de granulats recyclés. À 3% en CO2, le pH du milieu augmente en présence des souches, pouvant témoigner d’une activité de l’AC
The objective of this study is to develop a low environmental impact solution for the consolidation of partially submerged coastal areas. This solution, the formation of a limestone concretion based on seawater electolysis, relies on two main aspects: firstly, the efficient use of local resources through the valorization of inert construction waste (recycled aggregates (RA)); and secondly, the biomineralization process involving the hydration of CO2 by the enzyme carbonic anhydrase (CA) found in marine bacteria sampled from the Port of La Rochelle. Three major axes were studied to optimize the precipitation of a binder within the limeston concretion composed of CaCO3 and Mg(OH)2 (the calcareous deposit): the effect of RA dissolution in seawater, the application of cathodic polarization via seawater flow, and the study of CaCO3 bio-precipitation by CO2 capture (the role of CA) by marine strains. Seawater flow allowed the formation of a 200 cm3 agglomerate in 60 days at -500µA/cm², resulting in a growth rate of 3 cm3/day. A 10% increase in compactness was observed when the grid was buried (within the RA) either submerged or emerged. Seawater flow and the presence of RA favored the precipitation of CaCO3, particularly in the form of calcite, leading to an Mg(OH)2/CaCO3 ratio less than or equal to 1, whether under continuous or cyclic polarization. The excessive release of calcium and sulfate ions into solution due to the dissolution of the cementitious matrix within the RA could explain the increase in CaCO3. All strains bio-precipitated CaCO3 in their optimal medium and in the presence of natural seawater. Their production drastically decreased at 3% CO2 (atmospheric CO2 = 0.4%) and in the presence of leachate from recycled aggregates. At 3% CO2, the pH of the medium increased in the presence of the strains, which could indicate the activity of CA
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6

Aroulmoji, Vincent. "Approches physico-chimique et par RMN du proton des intéractions eau-molécules sapides et mécanisme de perception des mélanges de saveurs." Reims, 2002. http://www.theses.fr/2002REIMS017.

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Les propriétés physico-chimiques des sucres (glucose, fructose, saccharose) des gluconates de Na, K et Mg, de la caféine et de leurs mélanges sont déterminées dans l'eau avec l'objectif d'interpréter le mécanisme de perception de leur saveur. Les méthodes utilisées sont la viscosimétrie, la densitométrie, la compressibilité, les propriétés de surface et la RMN du proton. A partir des résultats de viscosimétrie, on accède au volume hydrodynamique et au coefficient d'interaction solvant/soluté. Le volume spécifique apparent informe sur la compatibilité entre soluté et solvant. Les propriétés de surface informent sur l'hydrophobie des substances étudiées et leur aptitude à s'adsorber sur une interface hydrophobe. La RMN du proton (vitesses de relaxation) aide à interpréter la chimioréception du goût à partir de la mobilité de l'eau. Les résultants obtenus à partir de deux groupes de méthodes indépendantes (physico-chimie, RMN) aident à élucider le rôle de l'eau dans la perception du goût.
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7

Nagaraju, Yathiraj. "Contribution to the Understanding of the Rheological Behaviour of Recycled Concrete Aggregate Mixtures Made of Coarse and Fine Particles." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40684.

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The use of recycled concrete aggregates (RCA) has gained increased attention in the past few decades as an alternative to decrease the carbon footprint of concrete construction. Yet, most of the research performed so far demonstrates that RCA concrete displays inferior performance in the fresh and hardened states when compared to conventional concrete (CC). The latter is believed due to the fact that very often the different microstructure of RCA is not accounted for while the mix-proportioning of RCA concrete. Recently, a number of mix-design procedures accounting for RCA microstructure have been proposed. Amongst them, the Equivalent Volume (EV) method seems to be quite promising. The EV method may proportion RCA concrete made of coarse (CRCA) or fine (FRCA) RCA and is based on a companion CC. Previous research has demonstrated that the fresh and hardened properties of EV mix-designed CRCA are suitable for structural applications. Yet, very few research, analysis and quantification have been conducted on the fresh behaviour of EV mix- proportioned FRCA concrete. This work presents a comprehensive study on the rheological behaviour of EV mix-designed CRCA and FRCA concrete presenting distinct features (i.e. inner qualities, mineralogy, fabrication process, etc.) through the use of a planetary rheometer (IBB). Results show that the EV is capable of proportioning low embodied energy CRCA and FRCA concrete with shear thinning profiles. The latter suggests that these mixtures are suitable for applications under high torque regimes such as vibrated or pumped concrete.
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8

Chan, Hoi Ying. "Designing a fabric planning process for low volume orders in apparel industry /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?IELM%202007%20CHAN.

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9

Seigneur, Alain. "Cytométrie en flux : conception d'un appareil et validation expérimentale." Paris 11, 1987. http://www.theses.fr/1987PA112025.

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La cytométrie en flux est une technique qui permet l'analyse et le tri de cellules biologiques vivantes à des cadences pouvant atteindre cinq à dix mille évènements par seconde. Après un rapide historique, nous présentons dans ce mémoire la conception et le développement d'un appareil "haut-de-gamme" ainsi que les résultats expérimentaux. La première partie expose les principes physiques permettant l'étude morphologique et fonctionnelle des cellules ou des constituants cellulaires. Les paramètres accessibles sont la mesure électrique du volume, la diffusion de la e et la fluorescence. Le principe du centrage hydrodynamique y est également présenté, ainsi que le fractionnement d'un jet d'eau en gouttelettes permettant le tri électrostatique des particules. Dans la deuxième partie, nous décrivons l'appareil que nous avons conçu au Commissariat à l'Energie Atomique (C. E. A. ) et industrialisé par la Société ODAM (ATC 3000). La dernière partie de cette thèse est consacrée à l'évaluation des performances de ce cytomètre. Nous analysons la différence entre les deux méthodes de mesure de la taille volume par la méthode électrique comparé à la diffusion aux petits angles. Nous montrons que notre optique originale a une sensibilité élevée pour la mesure·de la fluorescence des ondes biologiques : le bruit obtenu est équivalent à six cents molécules d'isothiocynate de fluorescéine (FITC). Nous analysons également les performances du tri et prouvons qu'il respecte la viabilité cellulaire
The flow cytometry techniques allow the analysis and sorting of living biologic cells at rates above five for then thousand events per second. After a short review, we present in this report the design and development of a "high-tech" apparatus intended for research laboratories and the experimental results. The first part deals with the physical principles allowing morphologic and functional analysis of cells or cellular components. The measured parameters are as follows: electrical resistance pulse sizing, light scattering and fluorescence. Hydrodynamic centering is used, and in the same way, the division of a water-stream into droplets leading to electrostatic sorting of particules. The second part deals with the apparatus design at the "Commissariat à l'Energie Atomique" (C. E. A. ) and industrialised by "ODAM" (ATC 3000). The last part of this thesis work is the performance evaluations of this cytometer. The difference between the two size measurement methods are analyzed: electrical resistance pulse sizing versus small-angle light scattering. By an original optics design, high sensitivity has been reached in the fluorescence measurement: the equivalent noise corresponds to six hundred fluorescein isothiocyanate (FITC) molecules. The sorting performances have also been analyzed and the cell viability proven
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10

Rollins, Paul. "Development of planning and scheduling reference architectures for the medium volume apparel industry." Thesis, University of Huddersfield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289420.

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Книги з теми "Apparent volume"

1

Australia, Standards Association of. Methods of testing concrete: Determination of water absorption and apparent volume of permeable voids in hardened concrete. [Sydney]: Standards Australia, 1999.

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2

De Benedetto, Nancy, and Ines Ravasini. Le letterature ispaniche nelle riviste del secondo Novecento italiano. Venice: Fondazione Università Ca’ Foscari, 2020. http://dx.doi.org/10.30687/978-88-6969-459-2.

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Da qualche anno è in vita un progetto di ricerca dell’Università degli Studi di Bari, che ha all’attivo ormai diversi contributi, sulla ricezione della letteratura spagnola nell’Italia del Novecento. Se il primo obiettivo è stato quello di avere un quadro esaustivo delle traduzioni di letteratura spagnola in volume, non meno significativo appare il lavoro di recensione degli articoli pubblicati nelle riviste di cultura. Relativamente alle riviste della prima metà del secolo abbiamo strumenti che supportano la ricerca e studi che offrono delle prime conclusioni, mentre molto meno chiaro è il quadro del secondo Novecento di cui si offre in questo volume una prima esplorazione, in vista di uno spoglio sistematico, e di una disamina puntuale dei contenuti.
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3

Nuvolati, Giampaolo, ed. Sviluppo urbano e politiche per la qualità della vita. Florence: Firenze University Press, 2018. http://dx.doi.org/10.36253/978-88-6453-736-8.

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La società attuale appare sempre più vulnerabile, incerta, complessa e ambigua ed in questo contesto aumenta la necessità di creare efficienti ed efficaci ecosistemi per la promozione locale della qualità della vita e dell’innovazione sociale. Il volume propone un excursus delle principali pratiche e politiche innovative che stanno accompagnando lo sviluppo urbano. Ogni saggio approfondisce un ambito di interesse – qualità della vita, innovazione sociale e sharing economy, smart city, mobilità urbana, nuovi luoghi del lavoro, abitare condiviso, eHealth, sicurezza urbana, giovani e turismo, food policy, innovazione didattica e amministrazione condivisa – offrendo una panoramica di riferimento per lo studio, la progettazione e l’implementazione di nuove strategie di intervento e politiche pubbliche. Il testo è rivolto a studenti, docenti, operatori che lavorano a vario livello in settori del sociale.
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Rossi, Monica, and Federica Ottone, eds. Teorie e sperimentalismo progettuale per la ricerca in tecnologia dell’architettura / Theories and experimental design for research in architectural technology. Florence: Firenze University Press, 2013. http://dx.doi.org/10.36253/978-88-6655-406-6.

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Il volume, che raccoglie riflessioni intorno al tema della città, intesa come campo di sperimentazione, traccia un panorama aggiornato della ricerca dottorale e post-dottorale in Tecnologia dell’Architettura, da cui traspare la volontà di offrire spunti teorici di ampio respiro e, contemporaneamente, testimoniare una vasta gamma di applicazioni specialistiche. Nell’approccio ambientale, che accoglie i suggerimenti dei territori valorizzandone la "cultura materiale", appare il tratto comune sul quale sono impostate molte delle tematiche di ricerca qui esposte. The book, that gathers reflections on the theme of the city, intended as field of experimentation, gives an updated panorama of the doctoral (PhD) and postdoctoral research in Architectural Technology, and offers ample theoretical insights as well as a large collection of specialized applications. The environmental approach, that welcomes suggestions from the surrounding areas, highlighting the "material culture", shows the common traits that are present in many of the research themes here exposed.
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Michelet, Jules. Il Rinascimento. Edited by Leandro Perini. Florence: Firenze University Press, 2016. http://dx.doi.org/10.36253/978-88-6655-990-0.

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Il Rinascimento dello storico francese Jules Michelet (1798-1874), volume VII della sua Histoire de France au seizième sièc le (1855), è qui tradotto per la prima volta in italiano da Leandro Perini che lo ha anche annotato, a differenza dalle edizioni francesi. La città di Firenze che accolse l’opera appena uscita nel suo Gabinetto Vieusseux, suscitando viva curiosità (come appare dai registri di prestito), accolse più tardi (1870) l’Autore quando, esule dalla Francia napoleonica, si trasferì nell’allora capitale del Regno d’Italia, accolto dagli amici italiani (Amari, Villari, l’editore Le Monnier). Composto in un momento di felicità creativa, Il Rinascimento di Michelet è nato da un’intuizione geniale: il contatto, anzi lo choc, conseguenza dell’invasione francese in Italia a cominciare da Carlo VIII, l’urto di un paese arretrato come la Francia contro la raffinata civiltà dell’Italia. Il Rinascimento, oltre che un capolavoro della storiografia romantica francese, è stato il seme fecondo della sua storiografia contemporanea, da Bloch a Febvre e da Braudel a Le Goff, che si è spesso richiamata all’opera sua. Uno storico insigne, dunque, un capolavoro: quasi un eroico vessillo.
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N, Kourteli Elena, and Winter, Robert J. D. (Robert James David), eds. Maîtriser les épreuves fonctionnelles respiratoires: De la théorie à la clinique. Issy-les-Moulineaux: Elsevier Masson, 2007.

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7

Occult Sciences: The Philosophy of Magic, Prodigies, and Apparent Miracles. ; Volume I. Creative Media Partners, LLC, 2022.

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Salverte, Eusèbe, and Anthony Todd Thomson. Occult Sciences : Volume 2: The Philosophy of Magic, Prodigies and Apparent Miracles. Cambridge University Press, 2013.

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9

Salverte, Eusèbe, and Anthony Todd Thomson. Occult Sciences : Volume 1: The Philosophy of Magic, Prodigies and Apparent Miracles. Cambridge University Press, 2013.

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10

Salverte, Eusèbe. The Occult Sciences. The Philosophy of Magic, Prodigies, and Apparent Miracles: Volume 2. Adamant Media Corporation, 2004.

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Частини книг з теми "Apparent volume"

1

Scherrmann, Jean-Michel, Kim Wolff, Christine A. Franco, Marc N. Potenza, Tayfun Uzbay, Lisiane Bizarro, David C. S. Roberts, et al. "Apparent Volume of Distribution." In Encyclopedia of Psychopharmacology, 142. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-68706-1_4066.

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Zacharias, Peter. "Apparent Power and Volume at Inductive Components." In Magnetic Components, 331–76. Wiesbaden: Springer Fachmedien Wiesbaden, 2022. http://dx.doi.org/10.1007/978-3-658-37206-4_8.

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Marchand, Paul, Raj Singhal, and Mark O’Grady. "Force Limited Vibration Using the Apparent Mass Method." In Shock & Vibration, Aircraft/Aerospace, Energy Harvesting, Acoustics & Optics, Volume 9, 53–66. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30087-0_6.

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Govrin, Aner, Golan Shahar, and Sharon Ziv-Beiman. "Psychoanalytic psychotherapy in Israel: a tale of hegemony, strife, and (apparent) growth." In The State of the Psychoanalytic Nation, Volume II, 30–48. London: Routledge, 2023. http://dx.doi.org/10.4324/9781003434047-4.

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Polio, Charlene. "Afterword." In Research Methods in the Study of L2 Writing Processes, 364–81. Amsterdam: John Benjamins Publishing Company, 2023. http://dx.doi.org/10.1075/rmal.5.17pol.

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In this afterword, I summarize the strengths and challenges of different research methods used to study second language writing processes with reference to the various chapters in the volume. This is followed by a discussion of considerations researchers have to make when choosing a method. Next, I summarize themes that are apparent throughout the volume, and then focus on certain themes that I believe need more attention.
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Peng, Zhang, Si Xinhua, Liu Dayang, and Fang Pengcheng. "Detection method of apparent defects of concrete bridge based on target detection and depth of field image." In Frontiers of Civil Engineering and Disaster Prevention and Control Volume 2, 104–13. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003348436-14.

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Talevi, Alan, and Carolina L. Bellera. "Real and Apparent Volumes of Distribution." In The ADME Encyclopedia, 1043–51. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-84860-6_52.

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Talevi, Alan, and Carolina L. Bellera. "Real and Apparent Volumes of Distribution." In The ADME Encyclopedia, 1–9. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-51519-5_52-1.

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Bettinger, Patrick. "Educational Perspectives on Mediality and Subjectivation: Introduction." In Palgrave Studies in Educational Media, 1–18. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-84343-4_1.

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AbstractThe concept of the subject has long been a central construct of the social sciences, cultural studies and the humanities. While the philosophical roots of the concept go back to antiquity, new discourses have developed in recent years that critically question and further develop concepts such as subject or subjectivation. In addition to theoretical strands of discussion, the focus is increasingly on the empirical possibilities of subjectification research. It is becoming apparent that the constitutive power of digital mediality—also from the perspective of educational science—is playing an increasingly significant role in these contexts. The introductory chapter presents a brief outline of these developments and provides a first insight into the contributions in this volume.
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Toubøl, Jonas, and Anders Sevelsted. "Paradigm Revived? Concluding Sketches of an Emerging Research Agenda." In Nonprofit and Civil Society Studies, 317–21. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-98798-5_14.

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AbstractThe concluding chapter of the book points to research agendas that have emerged from the contributions to the volume on movements and morality. It does not sum up each contribution, since an introduction to concepts, methods, and applications can be found in the introductory Chap. 1. Instead, the chapter identifies six lacunae in social movement studies that have become apparent in the pages of the book. A first lacuna is related to the bias in focus on left-wing groups, a second on the causal effects of morality, a third foundational lacuna pertains to the relationship between social science and moral philosophy, a fourth to how we perceive of morality and time, a fifth to the global diffusion of moral claims, and finally a sixth lacuna relates to reflections on the dilemma of universal moral claims versus particular identities and situations.
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Тези доповідей конференцій з теми "Apparent volume"

1

Dunlop, Raynal, Ricardo Parraguez Rojas, and Rodrigo Zepeda. "Using the apparent volume parameter to estimate rock mass damage." In Second International Symposium on Block and Sublevel Caving. Australian Centre for Geomechanics, Perth, 2010. http://dx.doi.org/10.36487/acg_rep/1002_8_dunlop.

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Rimeika, Mindaugas, and Ramunė Albrektienė. "Reduction of Apparent Water Losses." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.087.

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The water loss levels are very different between European countries as water loss varies from 7% to 50%. According to data from the Lithuanian Water Supply Association, in 2015 about 124 mln. m³ of ground water was supplied to the network, but only 94 mln. m³ of it was sold, while the remaining share represented water losses – 30 mln. m³ per year. An average water loss level in Lithuania is 24%, varying from 52% to 17%. Local water utilities take a little care of apparent water losses. This article deals with an investigation of apparent losses in Alytus and other cities in Lithuania. The reduction of apparent water losses is quite a different field as it does not require large additional investments and can produce quick and efficient results. Article presents the results on the ways for reduction of apparent water losses in Lithuanian water supply systems. The aim of research is to show that apparent water losses consist of considerable share of water losses and to prove that inconsiderable efforts can significantly cut down water losses and improve the utilities’ financial situation. Article present findings of night water consumption, used for DMA allowed minimum water calculation. Analysing water consumption data in blockhouses the minimum night water volume was determined (0.9 l/h/flat).
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Celik, Dogan, Richard John Klimas, Steven Van Sciver, and Jalal Zia. "An apparatus to measure the apparent thermal conductivity of multilayer insulation (MLI)." In ADVANCES IN CRYOGENIC ENGINEERING: Transactions of the Cryogenic Engineering Conference - CEC, Volume 57. AIP, 2012. http://dx.doi.org/10.1063/1.4707056.

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Alves Fortunato, Maira, Samir Bekri, David Rousseau, Tiphaine Courtaud, and Nicolas Wartenberg. "Transport of EOR Surfactant in Reservoirs: Impact of Polymer on Apparent Surfactant Inaccessible Pore Volume." In SPE EuropEC - Europe Energy Conference featured at the 84th EAGE Annual Conference & Exhibition. SPE, 2023. http://dx.doi.org/10.2118/214411-ms.

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Abstract Designing chemical EOR processes requires reservoir simulations that need to be backed by a good understanding of the mechanisms at play when injecting surfactant-based solutions in porous media. One of the main challenges is that laboratory coreflood tests often show early surfactant breakthroughs that cannot be easily history matched. Indeed, contrary to polymer macromolecules, smaller surfactant molecules are not supposed to experience the inaccessible pore volume (IPV) effect. The study's aim was to determine if, in surfactant-polymer flooding, the polymer could influence the transport of the surfactant in such a way that it would not be able to invade a fraction of the pore space. To that end, two multi-steps coreflood tests were performed with cores of outcrop rock in conditions representative of a reference field case. In the first test, the surfactant was injected without polymer and then, after a brine injection flush, with polymer. In the second test, the surfactant was directly injected with polymer. For both tests, in order to bypass the adsorption effect, the surfactant injected volumes at breakthrough were determined on rocks having their surface already fully saturated by surfactant. Namely, a first surfactant slug was injected in order to fulfill maximum rock adsorption capacity, then, immediately after, a second at a higher concentration of which the breakthrough was potentially influenced by IPV only. The polymer IPV were estimated by the conventional two-slugs method. In the first test, the result showed that, without polymer, the surfactant accessed all of the pore volume of the core while, in presence of polymer, the surfactant could not access about 2% of the pore volume, which corresponded to the polymer IPV. In the second test, the surfactant was not able to access 12% of the pore volume, which also corresponded to the polymer IPV. These outcomes stand as evidence that the presence of polymer impacts the transport of surfactant, leading it to experience an "apparent" surfactant IPV effect equal to the polymer's one. This suggests that interactions between polymer and surfactant molecules take place at the pore level. This study illustrates that surfactant transport properties in reservoirs can be more complex than conventionally accounted for in dynamic reservoir simulation. As history-matching of the coreflood essays is needed to build a representative dataset for surfactant-based EOR processes, improvements of the simulation software appear required for cases where IPV cannot be neglected.
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Buelow, Thomas, Rafael Wiemker, Lina Arbash Meinel, Hans Buurman, Ursula Kose, and Gillian M. Newstead. "Temporal variations in apparent breast lesion volume in dynamic contrast enhanced breast MR imaging." In SPIE Medical Imaging, edited by Nico Karssemeijer and Maryellen L. Giger. SPIE, 2009. http://dx.doi.org/10.1117/12.812220.

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Birchler, Brian A., James E. Guilkey, Benjamin J. Ellis, Steve Maas, and Jeffrey A. Weiss. "Effects of Interface Conditions and Volume Fraction on the Apparent Stiffness of Surrogate Multicellular Constructs." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176779.

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A common theme in tissue engineering and cell and tissue biomechanics is how the mechanical properties of individual tissue components or embedded cellular structures influence the continuum mechanical behavior of a tissue or construct. Meshless methods provide a useful and convenient computational framework for answering these questions [1], allowing predictions of both the effective mechanical properties of constructs and the local stresses and strains at the level of the cell. Our research focuses on understanding the mechanics of angiogenic microvessels embedded in surrogate extracellular matrix (ECM) materials [1–4]. As a first step toward understanding the interface interactions between microvessels and the ECM, the objectives of this study were to use the material point method (MPM) to analyze models of surrogate microvessels embedded in collagen gel and investigate the effects of microvessel volume fraction and interface conditions between the surrogate vessels and the collagen gel.
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Omar, Saad, and Dzevat Omeragic. "Use of apparent thickness for preprocessing of low-frequency electromagnetic data in inversion-based multibarrier evaluation workflow." In 44TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLUME 37. Author(s), 2018. http://dx.doi.org/10.1063/1.5031514.

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C. Baxter, Sarah, and Katherin A. Acton. "Distributions of Wave Velocities in Heterogeneous Media based on the Apparent Properties of Statistical Volume Elements." In Proceedings of the 8th International Conference on Computational Stochastic Mechanics (CSM 8). Singapore: Research Publishing Services, 2018. http://dx.doi.org/10.3850/978-981-11-2723-6_05-cd.

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Mostefai, Ilies, Marie Van Steene, and Ali Al-Mulla. "Three-Phase Saturation Evaluation Using Advanced Pulsed Neutron Measurement." In International Petroleum Technology Conference. IPTC, 2022. http://dx.doi.org/10.2523/iptc-22487-ms.

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Abstract Accurately monitoring saturation change mechanisms requires adequate surveillance methods and techniques. We present a methodology to evaluate three-phase saturation using an advanced pulsed neutron measurement. This is a complex reservoir monitoring situation, where gas saturation must be monitored in addition to oil saturation, in a variable water salinity environment. An advanced pulsed neutron logging tool provided robust thermal neutron measurement (hydrogen index) for gas quantification. Formation capture cross section (sigma) was not used for water saturation because of its sensitivity to water salinity, which changes vertically and laterally in the subject field. The apparent volume of oil from the tool's improved-precision carbon/oxygen (C/O) method provided a salinity-independent indicator of oil saturation. Since this C/O apparent oil volume combines the carbon contributions from oil and gas, elemental modeling provided the apparent oil volume response to gas. Lithology information and porosity from initial formation evaluation were also entered in a linear solver to resolve water, oil, and gas volumes. This methodology was applied in wells where all three fluid saturations (water, oil, and gas) were expected to change over time. Surveys were taken at regular intervals over a span of several years. With the improved precision of the advanced pulsed neutron measurement, it was possible to precisely map the saturation changes with time in the field and identify variations in the fluids’ volumes down to a few porosity units. This information was critical in understanding fluid movements inside the reservoir. This is the first implementation of this technique. The precision brought by the advanced pulsed neutron tool provides superior results for monitoring a complex fluid mixture.
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He, Lang, Bin Yang, Jing Liu, Xinyue Na, and Yang Ge. "A Novel Apparent Permeability Model in Shale Gas Reservoirs." In Offshore Technology Conference Asia. OTC, 2022. http://dx.doi.org/10.4043/31471-ms.

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Abstract A novel apparent permeability model of shale gas is derived considering the stress dependence, the thickness of adsorbed layer, slip flow, Knudsen diffusion and surface diffusion. The thickness of the adsorbed layer is derived according to the porosity occupied by the adsorbed phase in the capillary model. Consequently, the impact of the adsorbed layer and its change with the pressure on apparent permeability can be clearly revealed in the novel model in ultramicropores, or micropores, or mesopores, or macropores. With the stress dependence and the thickness of adsorbed layer considered simultaneously, the effective hole radius is substantiated to be smaller than the original hole radius to a certain degree. On account of this, the ratio of apparent permeability to the intrinsic permeability computed by the novel model is a lot distinct from the existing models. As the pressure increases, the ratio in the novel model declines from above 1 to below 1, followed by a slight upward trend. However, the ratio in other models drops all the way and yet remains above 1 as the pressure rises. Finally, the impact factors of permeability, including stress dependence coefficient, hole radius, reservoir pressure, Langmuir volume and Langmuir pressure, are analyzed. The contribution of slip flow, Knudsen diffusion and surface diffusion to apparent permeability is also illustrated.
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Звіти організацій з теми "Apparent volume"

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Hertel, Thomas, and Padma Swaminathan. Introducing Monopolistic Competition into the GTAP Model. GTAP Technical Paper, September 2000. http://dx.doi.org/10.21642/gtap.tp06.

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This technical paper documents one approach to incorporating monopolistic competition into the GTAP model. In this framework, consumer preferences are heterogeneous, leading to an apparent "love of variety" in the aggregate utility function for each region. The more heterogeneous are preferences, the smaller the elasticity of substitution in the aggregate utility function, and the greater the value placed on the addition of new varieties. The same is true for firms, which experience lower unit costs for differentiated, intermediate inputs, as the number of varieties on offer increases. In order to meet the diverse needs of consumers, firms differentiate their products through research and development (R&D) as well as advertising activities. These costs are assumed to be invariant to the total volume of sales for a given variety of product. With production occurring at constant returns to scale, this gives rise to declining average total costs. A zero profits equilibrium in this model is characterized by firms marking up their price over marginal costs by an amount sufficient to cover the fixed costs associated with establishing a new variety in the marketplace. Since the optimal markup is itself determined by the elasticity of substitution among varieties, this establishes a direct relationship between fixed costs and the degree of preference heterogeneity. The main differences between the monopolistically competitive sectors and the traditional GTAP sectors may be summarized as follows: We introduce two new variables: n, the number of firms in the industry and qof, the output per firm. Minimum expenditure and unit costs are declining in n. Average total costs are declining in output per firm. Unlike the Armington specification, foreign and domestic firms compete directly in the representative consumer's utility function. We illustrate this framework with a 2 commodity/3 region example in which we eliminate US antidumping duti
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Shumway, Dean A., Kimberly S. Corbin, Magdoleen H. Farah, Kelly E. Viola, Tarek Nayfeh, Samer Saadi, Vishal Shah, et al. Partial Breast Irradiation for Breast Cancer. Agency for Healthcare Research and Quality (AHRQ), January 2023. http://dx.doi.org/10.23970/ahrqepccer259.

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Objectives. To evaluate the comparative effectiveness and harms of partial breast irradiation (PBI) compared with whole breast irradiation (WBI) for early-stage breast cancer, and how differences in effectiveness and harms may be influenced by patient, tumor, and treatment factors, including treatment modality, target volume, dose, and fractionation. We also evaluated the relative financial toxicity of PBI versus WBI. Data sources. MEDLINE®, Embase®, Cochrane Central Registrar of Controlled Trials, Cochrane Database of Systematic Reviews, Scopus, and various grey literature sources from database inception to June 30, 2022. Review methods. We included randomized clinical trials (RCTs) and observational studies that enrolled adult women with early-stage breast cancer who received one of six PBI modalities: multi-catheter interstitial brachytherapy, single-entry catheter brachytherapy (also known as intracavitary brachytherapy), 3-dimensional conformal external beam radiation therapy (3DCRT), intensity-modulated radiation therapy (IMRT), proton radiation therapy, intraoperative radiotherapy (IORT). Pairs of independent reviewers screened and appraised studies. Results. Twenty-three original studies with 17,510 patients evaluated the comparative effectiveness of PBI, including 14 RCTs, 6 comparative observational studies, and 3 single-arm observational studies. PBI was not significantly different from WBI in terms of ipsilateral breast recurrence (IBR), overall survival, or cancer-free survival at 5 and 10 years (high strength of evidence [SOE]). Evidence for cosmetic outcomes was insufficient. Results were generally consistent when PBI modalities were compared with WBI, whether compared individually or combined. These PBI approaches included 3DCRT, IMRT, and multi-catheter interstitial brachytherapy. Compared with WBI, 3DCRT showed no difference in IBR, overall survival, or cancer-free survival at 5 and 10 years (moderate to high SOE); IMRT showed no difference in IBR or overall survival at 5 and 10 years (low SOE); multi-catheter interstitial brachytherapy showed no difference in IBR, overall survival, or cancer-free survival at 5 years (low SOE). Compared with WBI, IORT was associated with a higher IBR rate at 5, 10, and over 10 years (high SOE), with no difference in overall survival, cancer-free survival, or mastectomy-free survival (low to high SOE). There were significantly fewer acute adverse events (AEs) with PBI compared with WBI, with no apparent difference in late AEs (moderate SOE). Data about quality of life were limited. Head-to-head comparisons between the different PBI modalities showed insufficient evidence to estimate an effect on main outcomes. There were no significant differences in IBR or other outcomes according to patient, tumor, and treatment characteristics; however, data for subgroups were insufficient to draw conclusions. Eight studies addressed concepts closely related to financial toxicity. Compared with conventionally fractionated WBI, accelerated PBI was associated with lower transportation costs and days away from work. PBI was also associated with less subjective financial difficulty at various time points after radiotherapy. Conclusions. Clinical trials that compared PBI with WBI demonstrate no significant difference in the risk of IBR. PBI is associated with fewer acute AEs and may be associated with less financial toxicity. The current evidence supports the use of PBI in appropriately selected patients with early-stage breast cancer. Further investigation is needed to evaluate the outcomes of PBI in patients with various clinical and tumor characteristics, and to define optimal radiation treatment dose and technique for PBI.
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3

Jung, Carina, Matthew Carr, Eric Fleischman, and Chandler Roesch. Response of the green June beetle and its gut microbiome to RDX and phenanthrene. Engineer Research and Development Center (U.S.), November 2020. http://dx.doi.org/10.21079/11681/38799.

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Green June beetles are a cosmopolitan pest in the United States. Adults are voracious consumers of tree and vine fruit, while their larvae can dam-age and inadvertently consume root systems, particularly those of grasses, as they move through the soil and forage for detritus. Larvae ingest and process large volumes of soil while in the process of feeding. Due to their intimate contact with the soil it was hypothesized that soil contaminants that are known animal toxins would perturb the larval and affect their overall health and survival. Studies of this kind are important contribu-tions to the development of new model organisms and our understanding of interactions between the environment, contaminants, gut microbiome, and animal development, health, and survival. It is important to continue to develop relevant model organisms for monitoring toxicity as regulations for working with vertebrates becomes more prohibitive. In this study green June beetle larvae were exposed to RDX and phenanthrene through-out their entire soil-bound development, starting within the first few days of hatching through to their emergence as adults. The overall findings included that even at high concentrations, RDX and phenanthrene (25 ppm) exerted no significant effect on body weight or survival. Also, there was lit-tle apparent effect of RDX and phenanthrene on the bacterial microbiome, and no statistical association with measurable health effects. Nevertheless, the green June beetle is an interesting model for soil toxicity experiments in the future as is it easy to collect, house, and handle.
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L51655 Improved Intake Air Filtration Systems. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), September 1991. http://dx.doi.org/10.55274/r0010343.

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The quality of inlet air consumed by pipeline gas turbines plays a significant role in the performance, maintenance, and economy of turbine operations. The airborne contaminants may cause degradation of compressor blades and hot gas path components, primarily by erosion, corrosion, and fouling. For gas turbine service, air contamination is characterized by dust loading of the air (mass of dust per unit volume), chemical composition of the particulate matter, and particle size distribution. To ensure properly conditioned clean air for reliable performance under difficult conditions, the particulate contaminants must be removed by inlet air filters. The purpose of this program was to validate the use of new technology for self-cleaning are inlet filtration on gas turbine pumping applications. An approach utilizing triboelectrification of fabric filters was examined by testing to determine the efficiency, cleanability, pressure drop versus flow, and dust-holding capacity of seven pairs of filter cartridges: six fabric and one paper. While triboelectric (TE) properties of the fabric filter media yield no apparent improvement in filter properties relative to non-TE designs, electrically neutral fabric filters represent a major advance over conventional filters and the paper-media self-cleaning filter which were tested.
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