Relevant bibliographies by topics / M-PBI

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'M-PBI'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "M-PBI"

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Kumar, V. Vijaya, C. Ramesh Kumar, A. Suresh, S. Jayalakshmi, U. Kamachi Mudali, and N. Sivaraman. "Evaluation of polybenzimidazole-based polymers for the removal of uranium, thorium and palladium from aqueous medium." Royal Society Open Science 5, no. 6 (June 2018): 171701. http://dx.doi.org/10.1098/rsos.171701.

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Four types of polybenzimidazole (PBI)-based polymers ( m -PBI, p -PBI, pyridine-based m -PBI and alkylated m -PBI) have been prepared and characterized. Extraction behaviour of heavy metal ions, viz. U(VI), Th(IV) and Pd(II), with these polymers was investigated. Distribution ratios for the extraction of these metal ions were measured as a function of nitric acid concentration. Extraction data reveal that, in general, p -PBI exhibits a higher distribution ratio for U(VI), Th(IV) and Pd(II) compared with the other polymeric resins evaluated in the present study. Column chromatography experiments were carried out with a solution of U(VI), Th(IV) and Pd(II) in dilute nitric acid media using columns packed with m - and p -PBI polymeric material for understanding the sorption and elution behaviour. The p -PBI-based resin has shown higher palladium sorption capacity (1.8 mmol g −1 ). The studies also established that p -PBI resin is a potential candidate material for the recovery of U(VI) and Th(IV) (capacity 0.22 mmol g −1 and 0.13 mmol g −1 ) from an aqueous stream, e.g. mine water samples.
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Xiao, Li, Jia Xu, Jing Chen, Jicheng Luan, Yi Yang, Bing Zhang, Jianxi Yao, and Songyuan Dai. "Interface modification effects using a halide-free lead source for perovskite solar cells." Sustainable Energy & Fuels 1, no. 6 (2017): 1358–65. http://dx.doi.org/10.1039/c7se00200a.

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The control over remnant PbI2 at the m-TiO2/CH3NH3PbI3 interface by PbAc2 solution provides an efficient way to reduce carrier recombination.
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Fuentes, Isabel, Andreu Andrio, Abel García-Bernabé, Jorge Escorihuela, Clara Viñas, Francesc Teixidor, and Vicente Compañ. "Structural and dielectric properties of cobaltacarborane composite polybenzimidazole membranes as solid polymer electrolytes at high temperature." Physical Chemistry Chemical Physics 20, no. 15 (2018): 10173–84. http://dx.doi.org/10.1039/c8cp00372f.

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Escorihuela, Jorge, Abel García-Bernabé, and Vicente Compañ. "A Deep Insight into Different Acidic Additives as Doping Agents for Enhancing Proton Conductivity on Polybenzimidazole Membranes." Polymers 12, no. 6 (June 18, 2020): 1374. http://dx.doi.org/10.3390/polym12061374.

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The use of phosphoric acid doped polybenzimidazole (PBI) membranes for fuel cell applications has been extensively studied in the past decades. In this article, we present a systematic study of the physicochemical properties and proton conductivity of PBI membranes doped with the commonly used phosphoric acid at different concentrations (0.1, 1, and 14 M), and with other alternative acids such as phytic acid (0.075 M) and phosphotungstic acid (HPW, 0.1 M). The use of these three acids was reflected in the formation of channels in the polymeric network as observed by cross-section SEM images. The acid doping enhanced proton conductivity of PBI membranes and, after doping, these conducting materials maintained their mechanical properties and thermal stability for their application as proton exchange membrane fuel cells, capable of operating at intermediate or high temperatures. Under doping with similar acidic concentrations, membranes with phytic acid displayed a superior conducting behavior when compared to doping with phosphoric acid or phosphotungstic acid.
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Bolland, M. D. A., and D. G. Allen. "Phosphorus sorption by sandy soils from Western Australia: effect of previously sorbed P on P buffer capacity and single-point P sorption indices." Soil Research 41, no. 7 (2003): 1369. http://dx.doi.org/10.1071/sr02098.

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Soil samples collected from 8 field experiments in Western Australia to which 5–8 amounts of superphosphate had been applied once only 13–23 years previously were used to measure the phosphorus (P) buffer capacity of soil (PBC) and P sorption by several single-point indices. PBC was estimated from well-defined P sorption curves when several levels of P were added to soil suspensions, and was the amount of P sorbed when the concentration of P in the final solution was raised from 0.25 to 0.35 mg P/L. The single-point P sorption indices were measured by adding one amount of P (10 mg P/L) to soil suspensions (1 : 20, soil : 0.02 M KCl or 0.01 M CaCl2). Three indices were calculated from the amount of P sorbed by soil (S, mg P/kg soil) and the amount of P in solution (c, mg P/L)—(1) the phosphorus retention index (PRI, S/c [L/kg]), (2) the Freundlich retention index (FRI, S/c0.35 [dimensionless]), and (3) the phosphorus sorption index (PSI, S/log10 [c × 1000] [dimensionless])—to provide PRI K & Ca, FRI K & Ca, and PSI K & Ca values. P sorption was also measured by the P buffer index (PBI), the new single-point P sorption index recommended for national use, to provide PBICa values. To estimate the previous P sorbed by soil (native soil P is negligible for these soils, so previously sorbed P originates from fertiliser P applied in a previous year), the amount of P extracted by 0.5 M sodium bicarbonate from soil (Colwell soil test P) was added to the amount of P sorbed by soil to calculate PRI*K & Ca, FRI*K & Ca, PSI*K & Ca, and PBI*Ca values. In addition, previously sorbed P was estimated using the q coefficient of the Freundlich equation; q was added to P sorption to calculate PSI**, FRI**, PSI** and PBI** values to take account of previously sorbed P.For the 8 experiments, PBC values significantly decreased where more fertiliser P had been applied to the soils 13–23 years previously. This indicated that the capacity of the 8 soils to sorb P decreased as more P was applied in a previous year, and a single-point P sorption index would need to reflect this decrease. As the amount of P applied to soil in the field plots increased, the following trends occurred : (1) Colwell soil test P always increased; (2) PRIK & Ca, FRIK & Ca, PSIK & Ca, and PBICa consistently decreased; (3) PRI*K & Ca, FRI*K & Ca, PSI*K & Ca, and PBI*Ca mostly increased, but with some values being unaffected or decreasing; (4) PRI**, FRI**, PSI**, and PBI** values were largely unaffected by the amount of P applied in a previous year. Evidently, either adding Colwell soil test P or q to P sorption to calculate the single-point P sorption indices mostly overestimated P sorption by the sandy, low P sorbing soils used, but the overestimate was larger for Colwell soil test P than for q.
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Parrondo, Javier, Chitturi Venkateswara Rao, Sundara L. Ghatty, and B. Rambabu. "Electrochemical Performance Measurements of PBI-Based High-Temperature PEMFCs." International Journal of Electrochemistry 2011 (2011): 1–8. http://dx.doi.org/10.4061/2011/261065.

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Acid-doped poly(2,2′-m-phenylene-5,5′-bibenzimidazole) membranes have been prepared and used to assemble membrane electrode assemblies (MEAs) with various contents of PBI (1–30 wt.%) in the gas diffusion electrode (GDE). The MEAs were tested in the temperature range of140∘C–200∘C showing that the PBI content in the electrocatalyst layer influences strongly the electrochemical performance of the fuel cell. The MEAs were assembled using polyphosphoric acid doped PBI membranes having conductivities of 0.1 Scm−1at180∘C. The ionic resistance of the cathode decreased from 0.29 to 0.14 Ohm-cm2(180∘C) when the content of PBI is varied from 1 to 10 wt.%. Similarly, the mass transfer resistance or Warburg impedance increased 2.5 times, reaching values of 6 Ohm-cm2. 5 wt.% PBI-based MEA showed the best performance. The electrochemical impedance measurements were in good agreement with the fuel cell polarization curves obtained, and the optimum performance was obtained when overall resistance was minimal.
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Paglia, L., V. Genova, M. P. Bracciale, C. Bartuli, F. Marra, M. Natali, and G. Pulci. "Thermochemical characterization of polybenzimidazole with and without nano-ZrO2 for ablative materials application." Journal of Thermal Analysis and Calorimetry 142, no. 5 (October 28, 2020): 2149–61. http://dx.doi.org/10.1007/s10973-020-10343-4.

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AbstractDuring the ballistic atmospheric re-entry, a space vehicle has to withstand huge thermo-mechanical solicitations because of its high velocity and the friction with the atmosphere. According to the kind of the re-entry mission, the heat fluxes can be very high (in the order of some MW m−2) ;thus, an adequate thermal protection system is mandatory in order to preserve the structure of the vehicle, the payload and, for manned mission, the crew. Carbon phenolic ablators have been chosen for several missions because they are able to dissipate the incident heat flux very efficiently. Phenolic resin presents satisfying performance but also environmental drawbacks. Thus, a more environmental-friendly solution was conceived: a high-performance thermoplastic material, polybenzimidazole (PBI), was employed instead of phenolic resin. In this work PBI-ablative material samples were manufactured with and without the addition of nano-ZrO2 and tested with an oxyacetylene flame. For comparison, some carbon-phenolic ablators with the same density were manufactured and tested too. Thermogravimetric analysis on PBI samples was carried out at different heating rates, and the obtained TG data were elaborated to evaluate the activation energy of PBI and nano-filled PBI. The thermokinetics results for PBI show an improvement in thermal stability due to the addition of nano-ZrO2, while the oxyacetylene flame test enlightens how PBI ablators are able to overcome the carbon phenolic ablators performance, in particular when modified by the addition of nano-ZrO2.
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Lee, Sangrae, Ki-Ho Nam, Kwangwon Seo, Gunhwi Kim, and Haksoo Han. "Phase Inversion-Induced Porous Polybenzimidazole Fuel Cell Membranes: An Efficient Architecture for High-Temperature Water-Free Proton Transport." Polymers 12, no. 7 (July 19, 2020): 1604. http://dx.doi.org/10.3390/polym12071604.

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To cope with the demand for cleaner alternative energy, polymer electrolyte membrane fuel cells (PEMFCs) have received significant research attention owing to their high-power density, high fuel efficiency, and low polluting by-product. However, the water requirement of these cells has necessitated research on systems that do not require water and/or use other mediums with higher boiling points. In this work, a highly porous meta-polybenzimidazole (m-PBI) membrane was fabricated through the non-solvent induced phase inversion technique and thermal cross-linking for high-temperature PEMFC (HT-PEMFC) applications. Standard non-thermally treated porous membranes are susceptible to phosphoric acid (PA) even at low concentrations and are unsuitable as polymer electrolyte membranes (PEMs). With the porous structure of m-PBI membranes, higher PA uptake and minimal swelling, which is controlled via cross-linking, was achieved. In addition, the membranes exhibited partial asymmetrical morphology and are directly applicable to fuel cell systems without any further modifications. Membranes with insufficient cross-linking resulted in an unstable performance in HT-PEMFC environments. By optimizing thermal treatment, a high-performance membrane with limited swelling and improved proton conductivity was achieved. Finally, the m-PBI membrane exhibited enhanced acid retention, proton conductivity, and fuel cell performance.
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Meng, Chao, Sheng Huang, Dongmei Han, Shan Ren, Shuanjin Wang, and Min Xiao. "Semi-interpenetrating Network Membrane from Polyethyleneimine-Epoxy Resin and Polybenzimidazole for HT-PEM Fuel Cells." Advances in Polymer Technology 2020 (December 29, 2020): 1–8. http://dx.doi.org/10.1155/2020/3845982.

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In the present work, a semi-interpenetrating network (semi-IPN) high-temperature proton exchange membrane based on polyethyleneimine (PEI), epoxy resin (ER), and polybenzimidazole (PBI) was prepared and characterized, aiming at their future application in fuel cell devices. The physical properties of the semi-IPN membrane are characterized by thermogravimetric analysis (TGA) and tensile strength test. The results indicate that the as-prepared PEI-ER/PBI semi-IPN membranes possess excellent thermal stability and mechanical strength. After phosphoric acid (PA) doping treatment, the semi-IPN membranes show high proton conductivities. PA doping level and volume swelling ratio as well as proton conductivities of the semi-IPN membranes are found to be positively related to the PEI content. High proton conductivities of 3.9 ∽ 7.8 × 10 − 2 S c m − 1 are achieved at 160°C for these PA-doped PEI-ER/PBI series membranes. H2/O2 fuel cell assembled with PA-doped PEI-ER(1 : 2)/PBI membrane delivered a peak power density of 170 mW cm-2 at 160°C under anhydrous conditions.
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Верещагин, А. Л., О. Б. Кудряшова, Е. А. Морозова, Н. В. Бычин, and А. Н. Паседкина. "SONOCHEMICAL SYNTHESIS OF LEAD IODIDE." Южно-Сибирский научный вестник, no. 2(36) (April 30, 2021): 31–39. http://dx.doi.org/10.25699/sssb.2021.36.2.025.

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Йодид свинца образовывался при дозировании 0,02 М раствора KI в эквивалентное количество 0,01 М Pb(CH3COO)2 при комнатной температуре (с добавлением уксусной кислоты) и при ультразвуковом облучении с интенсивностью 8 или 16 Вт/см2. Установлено, что морфология частиц PbI2 образующегося при ультразвуковом облучении определяется рН среды. При рН 2,8…2,9 имеет место увеличение размера частиц в результате сварки вследствие столкновения частиц. Методом сканирующей электронной микроскопии обнаружены следы оплавления частиц и следы соударений. При рН 4,5…4,6 происходит диспергирование частиц вследствие соногидролиза и образования PbI(OH). Морфология образующихся частиц также зависит от способа получения: при дозировании йодида калия в раствор ацетата свинца образуются звездообразные структуры, при перекристаллизации – гексагональные пластины – во всех случаях размером порядка 10 мкм. Lead iodide was formed by dosing 0.02 M KI solution into an equivalent amount of 0.01 M Pb (CH3COO) 2 at room temperature (with the addition of acetic acid) and under ultrasonic irradiation with an intensity of 8 or 16 W / cm2. It was found that the morphology of PbI2 particles formed under ultrasonic irradiation is determined by the pH of the medium. At pH 2.8 ... 2.9, there is an increase in the particle size as a result of welding due to the collision of particles. Scanning electron microscopy revealed traces of particle fusion and impact traces. At pH 4.5 ... 4.6, the particles are dispersed due to sonohydrolysis and the formation of PbI (OH). The morphology of the resulting particles also depends on the method of production: when dosing potassium iodide into a solution of lead acetate, star-shaped structures are formed, during recrystallization, hexagonal plates are formed, in all cases about 10 μm in size
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Dissertations / Theses on the topic "M-PBI"

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Arredondo, Rosas Marcial. "Diseño y eficacia de un programa de entrenamiento en mindfulness y compasión basado en prácticas breves integradas." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/454897.

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La presente tesis pretende demostrar que un programa de entrenamiento basado en prácticas breves de mindfulness, respiración coherente y compasión (como prácticas principales) y así como también, acceder a un estado “mindful” de consciencia a través de “prácticas informales” en la vida cotidiana, produce cambios significativos en la disminución de síntomas de ansiedad, depresión estrés y burnout y en el aumento de las capacidades de mindfulness, descentramiento y autocompasión, así como también produce un incremento de la HRV en los participantes. Para demostrar esto, se presenta el diseño del protocolo M-PBI y dos estudios: En el protocolo se describe el programa y las diferentes prácticas que se realizan, en el primer estudio piloto (pre-post) no controlado, con una muestra de 74 participantes, se pudieron observar las diferencias estadísticamente significativas del efecto del programa M-PBI entre las medidas previas a la intervención y una vez finalizado el programa, en cuanto a ansiedad, depresión, estrés y capacidades de mindfulness y descentramiento, tanto para personas que estaban en tratamiento psicológico al momento de iniciar el programa 25% de la muestra), como en población no clínica (75% de la muestra); el segundo estudio se realizó en un entorno laboral, con una muestra de 40 sujetos, y consistió en un estudio intervencionista, aleatorizado y controlado con un grupo en lista de espera, evaluando el efecto del programa M-PBI sobre el estrés, burnout, HRV, mindfulness, descentramiento y autocompasión. Se pudo concluir que el Programa de entrenamiento en Mindfulness y Compasión basado en Prácticas Breves Integradas (M-PBI) se ha mostrado eficaz en la reducción de síntomas de estrés y burnout, y en el aumento de la capacidad de mindfulness, descentramiento y autocompasión. Se ha observado también un aumento de la HRV de los participantes, así como también, cambios significativos en la disminución de síntomas de ansiedad y depresión (pre vs. post entrenamiento). Se requieren estudios posteriores, con un tamaño muestral más grande, para confirmar estos resultados.
The present thesis aims to demonstrate that a training program based on brief practices of mindfulness, coherent breathing and compassion (as main practices) and also, access to a "mindful" state of consciousness through "informal practices" in life produces significant changes in the reduction of symptoms of anxiety, depression, stress and burnout and in the increase of the abilities of mindfulness, decentralization and self-compassion, as well as also an increase of the HRV in the participants. To demonstrate this, the design of the M-PBI protocol and two studies are presented: The protocol describes the program and the different practices that are performed in the first uncontrolled (pre-post) pilot study with a sample of 74 Participants, it was possible to observe the statistically significant differences in the effect of the M-PBI program between the measures prior to the intervention and at the end of the program, in terms of anxiety, depression, stress and mindfulness and decentralization capacities, both for people who were In psychological treatment at the time of starting the program 25% of the sample), as in non-clinical population (75% of the sample); The second study was performed in a work environment with a sample of 40 subjects, and consisted of an interventionist, randomized and controlled study with a waiting list group, evaluating the effect of the M-PBI program on stress, burnout, HRV , Mindfulness, decentering and self-compassion. It was concluded that the Mindfulness and Compassion Training Program based on Integrated Brief Practices (M-PBI) has been shown to be effective in reducing symptoms of stress and burnout, and in increasing the capacity for mindfulness, decentration and self-pity. An increase in participants' HRV has also been observed, as well as significant changes in the decrease in anxiety and depression symptoms (pre vs. post training). Further studies, with a larger sample size, are required to confirm these results.
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Zolfaghari, Ali M. (Ali Mohammad). "Electron cyclotron emissions fluctuation diagnostic on JET and PBX-M tokamaks." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/28077.

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Giraud, Sophie. "Nouvelles phases du système PbO-Bi2O3-M2O5 (M=P) : synthèses, structures, caractérisations et phases homologues (M=V, As)." Lille 1, 1999. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1999/50376-1999-335.pdf.

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Plusieurs nouveaux oxyphosphates de bismuth et de plomb ont été synthétisés lors de l'étude du système ternaire PbO-Bi2O3-P2O5 ; des études structurales par diffraction des rayons X ont été essentiellement effectuées. Pb4BiPO8 cristallise dans une maille triclinique (groupe d'espace P 1) et sa structure présente de nombreuses similitudes avec celles de alpha-PbO et Pb5SO8. L'utilisation d'un rayonnement à courte longueur d'onde (source synchrotron) permet de s'affranchir du phénomène d'absorption et augmente la précision des résultats. PbBiPO5, de symétrie triclinique, subit une transformation allotropique à 725°C. La forme haute température possède une maille monoclinique C. L'existence du compose PbBi6P4O20 a été confirmée et sa structure affinée sur poudre à partir des données structurales de la phase haute température isotype Bi6,67P4O 20. L'atome de plomb occupe alors totalement le site occupe aux 2/3 par un atome de bismuth dans la structure de Bi6,67P4O20. Les homologues isomorphes PbBi6V4O20 et PbBi6As4O 20 ont été mis en évidence. Pb5Bi18P4O42, surstructure de la phase fluorine delta-Bi2O3, cristallise dans une maille monoclinique I. La structure a été résolue dans le groupe d'espace I2/m à partir de données collectées au synchrotron (à courte longueur d'onde). Les atomes de plomb, bismuth et phosphore occupent sensiblement les mêmes positions que ceux du bismuth dans delta-Bi2O3. Pb10Bi33,33P10O85, de maille monoclinique centrée, présente également une surstructure de delta-Bi2O3. La substitution totale du phosphore par le vanadium et l'arsenic conduit à des composés isomorphes Pb5Bi18V4O42, Pb5Bi18As4O42, ainsi que Pb10Bi33,33V10O85 et Pb10Bi33,33As10O85. La conductivité de toutes ces phases a été mesurée. Les vanadates présentent une meilleure conductivité que leurs homologues isoformulaires. Les phases plus riches en bismuth et structurellement liées à delta-Bi2O3 sont meilleures conductrices.
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Fran?a, Roberto Ranniere Cavalcante de. "Dispositivos planares integrados utilizando m?todo din?mico com metamateriais e PBG." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15189.

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Made available in DSpace on 2014-12-17T14:55:05Z (GMT). No. of bitstreams: 1 RobertoRCF_TESE.pdf: 987513 bytes, checksum: 957f5ea8a43b953deeae4b60b26191b2 (MD5) Previous issue date: 2012-05-18
Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
This work presents a theoretical, numerical and computation analysis of parameters of a rectangular microstrip antenna with metamaterial substrate, fin line as a coupler and also integrated devices like integrated filter antenna. It is applied theory to full-wave of Transverse Transmission Line - TTL method, to characterize the magnitude of the substrate and obtain the general equations of the electromagnetic fields. About the metamaterial, they are characterized by permittivity and permeability tensor, reaching to the general equations for the electromagnetic fields of the antenna. It is presented a study about main representation of PBG(Photonic Band Gap) material and its applied for a specific configuration. A few parameters are simulated some structures in order to reduce the physical dimensions and increase the bandwidth. The results are presented through graphs. The theoretical and computational analysis of this work have shown accurate and relatively concise. Conclusions are drawn and suggestions for future work
Este trabalho apresenta a an?lise te?rica, num?rica e computacional dos par?metros de uma antena de microfita do tipo retangular sobre substrato metamaterial, linha de laminas na forma de acoplador e tamb?m de estruturas integrada como a antena filtro integrada. ? aplicada a teoria de onda completa do m?todo da Linha de Transmiss?o Transversa - LTT, para a caracteriza??o das grandezas do substrato e obten??o das equa??es gerais dos campos eletromagn?ticos. Sobre o metamaterial, os mesmos s?o caracterizados atrav?s de tensores permissividade e permeabilidade, chegando-se ?s equa??es gerais para os campos eletromagn?ticos da antena. ? apresentado um estudo das principais representa??es do material PBG (Photonic Band Gap) e suas aplica??es para determinadas configura??es. S?o simulados v?rios par?metros de algumas estruturas com o intuito de diminuir as dimens?es f?sicas e aumentar a largura de banda das mesmas. Os resultados s?o apresentados atrav?s de gr?ficos. A an?lise te?rico-computacional desse trabalho se mostra precisa e relativamente concisa. S?o apresentadas as conclus?es e sugest?es para trabalhos futuros
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Ilali, Jaffar. "Contribution à l'étude des systèmes M²+F-M+F-LnF, avec M+ = Pb, Ba, Sr et Ca, M+ = K, Na et Rb Ln³Yn La." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376144866.

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Feja, Steffen. "Darstellung und Charakterisierung ternärer Molybdate in den Systemen M - Mo - O (M = Sn, Pb, Sb)." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1101201293828-88525.

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Das Phasendiagramm Sn - Mo - O wurde für 500°C und 1000°C experimentell abgeleitet. Als ternäre Phasen konnten SnMo2O8 und Sn1-xMo4-yO6-2y dargestellt werden. Die Phasen SnMo5O8 und Sn4,4Mo24O38 konnten unterhalb von 1000°C nicht dargestellt werden. Die Phase SnMo2O8 wurde über Festkörper - Gasphasenreaktion einkristallin dargestellt und auf ihr thermisches Verhalten untersucht. Anhand dieser Untersuchungen konnte das Phasendiagramm SnO2 - MoO3 abgeleitet werden. An dieser Phase wurden Einkristall-untersuchungen durchgeführt. Die Struktur der Phase SnMo2O8 wurde in der Raumgruppe Pa (a = 8,967 Å) gelöst. Die Zinnatome besetzen die Flächen - und Kantenmitten der Elementarzelle. Die Lage der Molybdän - und Sauerstoffpositionen kann über ein Fehlordnungsmodell beschrieben werden. Die Phase Sn1-xMo4-yO6-2y konnte über chemischen Transport mit Wasser einkristallin hergestellt werden. Einkristalluntersuchungen bestätigten eine Überstruktur zur NaMo4O6 - Struktur. Die Phase weist mit hoher Wahrscheinlichkeit eine Unterstöchiometrie im Zinngehalt, sowie im Molybdän - bzw. Sauerstoffgehalt auf. Diese Tatsache konnte durch Mößbaueruntersuchungen am Pulver von Sn1-xMo4-yO6-2y bestätigt werden. Eine Lösung der Struktur von Sn1-xMo4-yO6-2y war bisher nicht möglich. Die thermodynamischen Daten der Phasen SnMo2O8 und SnMo4O6 (vereinfacht für Sn1-xMo4-yO6-2y) konnten theoretisch abgeleitet werden. Das Zustandsdiagramm Sn - Mo - O wurde berechnet. Die Überprüfung der Daten erfolgte durch die Berechnung der Bodenkörper - Gasphasengleichgewichte mit dem Programm TRAGMIN. Mit den abgeleiteten Daten wurden Berechnungen zum chemischen Transportverhalten durchgeführt. Dabei wurde gefunden, dass sich die Phase Sn1-xMo4-yO6-2y über chemischen Transport abscheiden lässt. Das Phasendiagramm Pb - Mo - O wurde bis 1000°C experimentell abgeleitet. Die Phasen PbMoO4 und Pb2MoO5 konnten als einphasige Pulver hergestellt werden. Die Phase Pb0,75Mo4O6 konnte über chemischen Transport einkristallin abgeschieden werden. Beim Erhitzen auf 1250°C wurde die Zersetzung dieser Phase in die Phase PbMo5O8 und Mo beobachtet. Die thermodynamischen Daten der Phasen PbMoO4, Pb2MoO5, Pb5MoO8 und Pb0,75Mo4O6 konnten theoretisch abgeleitet werden. Das Zustandsdiagramm Pb - Mo - O wurde berechnet. Im Verlauf der Rechnungen wurde das Zustandsdiagramm PbO - MoO3 mit dem Programm CHEMSAGE berechnet und mit den Literaturdaten verglichen. Die Überprüfung der Daten erfolgte durch die Berechnung der Bodenkörper - Gasphasengleichgewichte mit dem Programm TRAGMIN. Mit den abgeleiteten Daten wurden Berechnungen zum chemischen Transportverhalten durchgeführt. Dabei wurde gefunden, dass sich die Phase Pb0,75Mo4O6 über chemischen Transport abscheiden lässt. Das Phasendiagramm Sb - Mo - O wurde bei 500°C bzw. 700°C experimentell abgeleitet. Im System existieren die Phasen Sb2MoO6 und Sb2Mo10O31. Sb2Mo10O31 konnte einphasig als Pulver hergestellt werden. Die Existenz einer Phase mit der Zusammensetzung Sb4Mo10O31 konnte nicht bestätigt werden. Es wurden Hinweise auf eine dritte ternäre Phase im System Sb - Mo - O gefunden. Die Phasen Sb2MoO6 und Sb2Mo10O31 konnten über chemischen Transport einkristallin dargestellt werden. Mößbaueruntersuchungen an Sb2Mo10O31 ergaben, dass in der Verbindung ausschliesslich dreiwertiges Sb vorliegt und somit Mo gemischtvalent sein muss. Die thermodynamischen Daten der Phasen Sb2MoO6 und Sb2Mo10O31 konnten theoretisch abgeleitet werden. Das Zustandsdiagramm Sb - Mo - O wurde berechnet. Die Überprüfung der Daten erfolgte durch die Berechnung der Bodenkörper - Gasphasengleichgewichte mit dem Programm TRAGMIN. Mit den abgeleiteten Daten wurden Berechnungen zum chemischen Transportverhalten durchgeführt. Dabei wurde gefunden, dass sich beide ternäre Phasen über chemischen Transport abscheiden lassen.
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AURIEL, CHRISTOPHE. "Phases incommensurables (mx)#n(tx#2)#m avec m=pb, sn; t=ti, nb; x=s, se et m=1 et 2." Nantes, 1993. http://www.theses.fr/1993NANT2072.

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Les composes (mx)#n(tx#2)#m avec m=pb, sn; t=ti, nb, ta et x=s, se, (m=1 ou 2) etudies durant ma these constituent une nouvelle famille ou l'on retrouve les caracteristiques generales des structures composites (les entites tx#2 alternent regulierement avec celles de mx). Une faible interaction mutuelle lie ces feuillets. En raison de cette interaction, les atomes a l'interface se reordonnent conduisant ainsi a une modulation de chaque sous-structure. Une etude basee sur le concept de cristal composite (affinement sur des mailles distinctes) nous a conduit a des structures moyennes. Cette approche est une base suffisante pour decrire la structure complete dans le cadre de la theorie des groupes de super-espace, qui est la seule veritable solution pour de telles structures. Cette description sera aussi presentee, avec l'affinement de pbnb#2s#5 en groupe de super-espace. La caracterisation de ces nouvelles phases nous a naturellement conduit a passer des composes monocouches (m=1) aux composes bicouches (m=2) et de distinguer 2 groupes suivant l'environnement du cation t. Lors de ces determinations structurales nous avons aussi observe l'existence de polytypisme pour pbnb#2s#5. Ces phases presentent aussi des proprietes physiques interessantes et diverses. Par exemple, l'evolution des proprietes electriques en fonction de t et du mode d'empilement des feuillets tx#2 montre une forte correlation structure-proprietes physiques. Ces dernieres tres similaires a celles observees dans les intercalaires m#xtx#2 nous permettent d'apprehender ces phases comme un cas limite d'intercalation. La presence de sites disponibles dans la lacune de van der waals (dans les composes bicouches), nous a permis aussi d'envisager une chimie d'intercalation pouvant modifier certaines proprietes de ces composes. Une etude menee en spectroscopie de perte d'energie nous a permis, de suivre l'evolution electronique de la structure hote et du metal intercale, et de localiser les ions lithium
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Santos, K?sia Cristiane dos. "Aplica??o do m?todo LTT ?s estruturas retangulares e triangulares em multicamadas e empilhadas em substratos PBG para comunica??es m?veis." Universidade Federal do Rio Grande do Norte, 2005. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15434.

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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
Recently the planar antennas have been studied due to their characteristics as well as the advantages that they offers when compared with another types of antennas. In the mobile communications area, the need for this kind of antennas have became each time bigger due to the intense increase of the mobile communications that needs of antennas which operate in multifrequency and wide bandwidth. The microstrip antennas presents narrow bandwidth due the loss in the dielectric generated by radiation. Another limitation is the radiation pattern degradation due the generation of surface waves in the substrate. In this work some used techniques to minimize the disadvantages (previously mentioned) of the use of microstrip antennas are presented, those are: substrates with PBG material - Photonic Bandgap, multilayer antennas and with stacked patches. The developed analysis in this work used the TTL - Transverse Transmission Line method in the domain of Fourier transform, that uses a component of propagation in the y direction (transverse to the direction real of propagation z), treating the general equations of electric and magnetic field as functions of y and y . This work has as objective the application of the TTL method to microstrip structures with single and multilayers of rectangular and triangular patches, to obtaining the resonance frequency and radiation pattern of each structure. This method is applied for the treatment of the fields in stacked structures. The Homogenization theory will be applied to obtaining the effective permittivity for s and p polarizations of the substrate composed of PBG material. Numerical results for the triangular and rectangular antennas with single layer, multilayers resonators with triangular and rectangular patches are presented (in photonic and isotropic substrates). Conclusions and suggestions for continuity of this work are presented
Recentemente as antenas planares t?m despertado interesses devido ?s suas caracter?sticas assim como pelas vantagens que oferecem quando comparadas com os demais tipos de antenas. Na ?rea de comunica??es m?veis a necessidade de antenas desse tipo tem se tornado cada vez maior devido ao intenso crescimento das comunica??es m?veis que necessitam de antenas que operem em multifreq??ncia e em banda larga. As antenas de microfita apresentam largura de banda estreita devido ?s perdas no diel?trico geradas pela irradia??o. Outra limita??o ? a degrada??o do diagrama de irradia??o devido ? gera??o de ondas de superf?cie no substrato. Neste trabalho s?o apresentadas algumas t?cnicas usadas para tentar minimizar as desvantagens (citadas acima) do uso de antenas de microfita, sendo elas: substratos com material PBG – Photonic Bandgap, antenas em multicamadas e com patches empilhados. As an?lises desenvolvidas neste trabalho foram realizadas com a utiliza??o do m?todo LTT – Linha de Transmiss?o Transversa no dom?nio da transformada de Fourier que utiliza uma componente de propaga??o na dire??o y (transversa ? dire??o real de propaga??o z), tratando assim as equa??es gerais dos campos el?tricos e magn?ticos em fun??es de y e y . Este trabalho tem como objetivo a aplica??o do m?todo LTT ?s estruturas de microfita com uma e multicamadas de patch retangular e triangular, para a obten??o da freq??ncia de resson?ncia e diagrama de irradia??o de cada estrutura. Este m?todo ? aplicado para o tratamento dos campos em estruturas planares empilhadas. A teoria da Homogeneiza??o ser? aplicada para a obten??o da permissividade efetiva para as polariza??es s e p dos substratos compostos de material PBG - Photonic Bandgap. Resultados num?ricos para as antenas triangulares e retangulares com uma camada e ressoadores com multicamadas de patch retangular e triangular s?o apresentados (em substratos isotr?picos e fot?nicos). S?o apresentadas conclus?es e sugest?es para a continuidade deste trabalho
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9

Lazaro, Sergio Ricardo de. "Estudo da estrutura eletrônica dos matewriais PbTiO3 e Pb1-XMXTiO3 (M=Ca, Sr, Ba)." Universidade Federal de São Carlos, 2006. https://repositorio.ufscar.br/handle/ufscar/6084.

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In this project about STUDY OF THE STRUCTURE ELECTRONIC OF THE PbTiO3 MATERIAL is presented results, discussions and conclusions to respect of the use of theoretical-computational chemistry in the modeling of structures type Perovskites at applications in the eletro-electronic area. It was used ab initio methodology and the Density of Funcional Theory (DFT) to calculate the structure electronic of the PbTiO3 (PT) e Pb1-xMxTiO3 (M = Ca, Sr e Ba) materials. It was idealized this propose due to need of better understanding the influence of the surface, the substitution of atoms and defects in the lattice ceramic type Perovskites and anticipate tendencies through modeling of these materials. The density of states (DOS), bands structure, Mulliken charges, polarization and chemical potential were used to analysis of these systems.
A presente tese sobre o Estudo da estrutura eletrônica do material PbTiO3 apresenta resultados, discussões e conclusões a respeito do uso de química teórica computacional para modelar estruturas tipo Perovskita com aplicações na área de eletro-eletrônico. Essa área mais especificamente é voltada para memórias ferroelétricas (FRAM). Como em qualquer estudo químico a estrutura molecular em questão é de fundamental importância para o desenvolvimento do projeto. Para a propriedade de ferroeletricidade a influência da superfície da partícula e da transformação da fase do sólido, por meio de adições de átomos causa modificações na simetria local. Essa simetria local se encontra no átomo de Ti sendo denominado formador da rede para os titanatos. Os átomos de Pb, Ca, Sr e Ba são especificados como modificadores da rede. Idealizou-se essa proposta devido à necessidade do melhor entendimento da influência dos fatores: superfície, substituição de átomos e defeitos na estrutura eletrônica das cerâmicas do tipo Perovskitas para prever tendências por meio de modelos para esses materiais. Está implícito nesse trabalho o uso do efeito Jahn- Teller para entender o conceito de ordem-desordem local, responsável por propriedades como a fotoluminescência a temperatura ambiente em sólidos amorfos; aqui chamados sólidos desordenados. Esses matérias têm grande possibilidade de aplicação em dispositivos tipo LED´s (Light Emission Devices). Utilizou-se método ab initio e a Teoria do Funcional de Densidade (DFT) com o potencial B3LYP para o cálculo da estrutura eletrônica dos materiais PbTiO3 (PT) e Pb1-xMxTiO3 (M = Ca, Sr e Ba). Para isso utilizaram-se resultados como a densidade de estados (DOS) que é a estatística das contribuições dos orbitais atômicos (autovetores) em cada orbital cristalino (autovalor). A análise da estrutura de bandas é a distribuição dos níveis de energia do sólido entre suas regiões simétricas (Zonas de Brilloun). Cargas de Mulliken é uma forma de se estimar a carga dos átomos do material. O dado de polarização entre átomos está restrito ente dois átomos; e o potencial químico foi estimado pela energia de Fermi do sistema a temperatura de zero Kelvin que, no presente nível de cálculo, coincide com a energia da última banda de valência do sistema em investigação.
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10

Burgstaller, Georg. "Kritikerdämmerung : Heinrich Schenker and music journalism." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/378160/.

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Despite the steady amount of research that has gone into the life and mind of Viennese music theorist Heinrich Schenker (1868-1935) in recent decades, certain facets of his thinking continue to puzzle scholars. These include the question of how a thinker nowadays highly regarded for his considerable powers of insight into the music of Bach, Mozart, and Beethoven came to hold views that were bigoted, odious, and militantly German-nationalist. This thesis confronts the issue by recapturing Schenker’s hitherto uncharted engagement with one of the phenomena of modern life that he vocally rejected: music journalism. Although a profession that is today considered as duly coexisting with the musical academy that Schenker’s analytical practice helped to shape, he was far less tolerant of what was written about music in the only mass medium of its day. This study offers a close reading of a variety of archival sources that include an unpublished essay on music criticism by the theorist as well as his diary and correspondence, most of which is newly accessible through Schenker Documents Online. In order to situate his thinking within the cultural hothouse of his day, my research also draws on an selection of newspaper articles, mostly on the subject of criticism, that Schenker deemed significant enough to file with his own papers. As a result of this procedure, this study establishes Schenker’s trepidations about music journalism and assesses their context. It reveals his critical view of journalism as a manifestation of individualism and democracy escalating alongside the rapid social and artistic transformations that he witnessed after the turn of the twentieth century. It also illustrates his increasingly agitated perception of music journalism as directly damaging his career. Finally, this thesis demonstrates how, in the course of the 1910s, Schenker came to conflate his antagonism towards one particular journalist, German critic Paul Bekker, with his embrace of German nationalism. By engaging not only with Schenker’s writings but also his reading materials, this study locates his thinking within that of his contemporaries and, as a result, helps us make sense of some of his often opaque assertions about art, society, and criticism.
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Books on the topic "M-PBI"

1

Guskos, Nikos. Wpływ zewnętrznego pola elektrycznego na kubiczne centra jonów Eu²+ I Gd³+ w monokryształach typu MF₂ (M²+ = Ca²+, Cd²+, Sr²+, Ba²+ i Pb²+). Szczecin: Wydawn. Uczelniane Politechniki Szczecińskiej, 1991.

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Messunsicherheit 2019. VDI Verlag, 2019. http://dx.doi.org/10.51202/9783181023655.

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parallel hat auch die 4. VDI-Fachtagung „Prüfprozesse in der industriellen Praxis 2019“ stattgefunden. Dieser VDI-Bericht ist ausschließlich als PDF-Dokument erschienen! Inhalt Keynotes Das neue internationale Einheitensystem – jetzt auch für Außerirdische 1 F. Härtig, K. Lehrmann, Physikalisch-Technische Bundesanstalt Braunschweig und Berlin Konformitätsbewertung und Messunsicherheit I Entscheidungsregeln und Konformitätsbewertung – ein Überblick 15 M. Czaske, Physikalisch-Technische Bundesanstalt (PTB), Braunschweig; M. Kemper, Physikalisch-Technische Bundesanstalt, Berlin Spezifikationen verstehen – Basis der Konformitätsbewertung und Messunsicherheitsbetrachung 23 A. C. Böck, esz AG calibration & metrology, Eichenau Entscheidungsregeln bei Konformitätsaussagen im Mess- und Kalibrierwesen – Beispiele aus der Praxis 35 E. Hage, K. Diedrich, Sartorius Lab Instruments, Göttingen Masse und Waagen The Planck-Balance (PB2) – Using a fixed value of th...
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Cross M/keith M Racism the City & the State Pb. HarperCollins Publishers Ltd, 1991.

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Syvanen Dr. M Molecular Evolution Pb. HarperCollins Publishers Ltd, 1991.

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Prof Driscoll M European Community Pb. HarperCollins Publishers Ltd, 1991.

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S Self/M Sykes Quantitative Volcanology Pb. HarperCollins Publishers Ltd, 1991.

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ZZ : KS3 Maths Pupil Book: Ks3 m pb. Pearson Education, Limited, 2008.

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Montgomery M: Go for English Term7 Pb(Cameroon). Macmillan Education Ltd, 1993.

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ZZ : KS3 Maths Pupil Book: Ks3 m pb. Pearson Education, Limited, 2008.

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NCCER. Sm Electrical Level 2 98 Rev Pb I/M. Pearson US Imports & PHIPEs, 1998.

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Book chapters on the topic "M-PBI"

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Klaudel, Hanna, and Franck Pommereau. "Asynchronous Links in the PBC and M-Nets." In Advances in Computing Science — ASIAN’99, 190–200. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/3-540-46674-6_17.

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Dajuma, Alima, Siélé Silué, Kehinde O. Ogunjobi, Heike Vogel, Evelyne Touré N’Datchoh, Véronique Yoboué, Arona Diedhiou, and Bernhard Vogel. "Biomass Burning Effects on the Climate over Southern West Africa During the Summer Monsoon." In African Handbook of Climate Change Adaptation, 1515–32. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_86.

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AbstractBiomass Burning (BB) aerosol has attracted considerable attention due to its detrimental effects on climate through its radiative properties. In Africa, fire patterns are anticorrelated with the southward-northward movement of the intertropical convergence zone (ITCZ). Each year between June and September, BB occurs in the southern hemisphere of Africa, and aerosols are carried westward by the African Easterly Jet (AEJ) and advected at an altitude of between 2 and 4 km. Observations made during a field campaign of Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa (DACCIWA) (Knippertz et al., Bull Am Meteorol Soc 96:1451–1460, 2015) during the West African Monsoon (WAM) of June–July 2016 have revealed large quantities of BB aerosols in the Planetary Boundary Layer (PBL) over southern West Africa (SWA).This chapter examines the effects of the long-range transport of BB aerosols on the climate over SWA by means of a modeling study, and proposes several adaptation and mitigation strategies for policy makers regarding this phenomenon. A high-resolution regional climate model, known as the Consortium for Small-scale Modelling – Aerosols and Reactive Traces (COSMO-ART) gases, was used to conduct two set of experiments, with and without BB emissions, to quantify their impacts on the SWA atmosphere. Results revealed a reduction in surface shortwave (SW) radiation of up to about 6.5 W m−2 and an 11% increase of Cloud Droplets Number Concentration (CDNC) over the SWA domain. Also, an increase of 12.45% in Particulate Matter (PM25) surface concentration was observed in Abidjan (9.75 μg m−3), Accra (10.7 μg m−3), Cotonou (10.7 μg m−3), and Lagos (8 μg m−3), while the carbon monoxide (CO) mixing ratio increased by 90 ppb in Abidjan and Accra due to BB. Moreover, BB aerosols were found to contribute to a 70% increase of organic carbon (OC) below 1 km in the PBL, followed by black carbon (BC) with 24.5%. This work highlights the contribution of the long-range transport of BB pollutants to pollution levels in SWA and their effects on the climate. It focuses on a case study of 3 days (5–7 July 2016). However, more research on a longer time period is necessary to inform decision making properly.This study emphasizes the need to implement a long-term air quality monitoring system in SWA as a method of climate change mitigation and adaptation.
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Reindl, S. L., G. M. Pastor, and K. H. Bennemann. "On the stability of Pb n m +-clusters." In Small Particles and Inorganic Clusters, 583–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76178-2_139.

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Greenblatt, M., L. E. H. Mcmills, S. Li, K. V. Ramanujachary, M. H. Pan, Z. Zhang, Thomas E. Sutto, Jian-Ming Zhu, and Bruce A. Averill. "Synthesis of Tl2Ba2Can-1CunO2n+4(n = 1, 2, 3), (Tl,M)Sr2Cuo5±δ(M = Bi, Pb), and (Tl, Pb)Sr2CaCu2O7+±δ." In Inorganic Syntheses, 201–7. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470132616.ch38.

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Eichler, Jack F., Oliver Just, and William S. Rees. "A General Route to M4N4Heterocubanes: Synthesis and Crystal Structure of [M(μ3NSiMe3)]4(M=Ge, Pb)." In ACS Symposium Series, 122–36. Washington, DC: American Chemical Society, 2005. http://dx.doi.org/10.1021/bk-2005-0917.ch009.

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Meiners, Wilhelm, S. Heer, J. Volkert, F. Schaede, and P. Wagenblast. "Methodik zur Quantifizierung der Laserstrahl-Schmauch Interaktion in Multilaser PBF-LB/M Anlagen." In Proceedings of the 17th Rapid.Tech 3D Conference Erfurt, Germany, 22–23 June 2021, 67–79. München: Carl Hanser Verlag GmbH & Co. KG, 2021. http://dx.doi.org/10.3139/9783446471733.005.

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Yan, Yong Gao, Xin Feng Tang, Hai Jun Liu, Ling Ling Yin, and Qing Jie Zhang. "Thermoelectric Properties of Ag1-xPbmSbTe2+m Compounds." In Key Engineering Materials, 854–56. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.854.

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Chaupatnaik, Anshuman, and Prabeer Barpanda. "Combustion Synthesized MLi2Ti6O14 (M = Sr, Ba, Pb) Titanate Anodes for Lithium-Ion Batteries." In Recent Research Trends in Energy Storage Devices, 9–17. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6394-2_2.

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Rouxel, Jean, and Alain Meerschaut. "Misfit Layer Compounds (MX)1+x(TX2)m M= Pb, Bi, Sn; T = Ti, V, Cr, Ta, Nb; X = S, Se; 0.08." In Physics and Chemistry of Low-Dimensional Inorganic Conductors, 59–70. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1149-2_4.

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Thongtem, Titipun, Sulawan Kaowphong, and Somchai Thongtem. "Luminescence of MWO4 (M =Ca, Sr, Ba and Pb) Prepared by Solvothermal Reaction." In Solid State Phenomena, 315–18. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-31-0.315.

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Conference papers on the topic "M-PBI"

1

Cheddie, Denver F., and Norman D. H. Munroe. "Computational Modeling of PEM Fuel Cells With PBI Membranes." In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97127.

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A parametric model of a proton exchange membrane fuel cell (PEMFC) operating with a polybenzimidazole (PBI) membrane is presented. The model is three dimensional and applicable for PEMFCs operating at intermediate temperatures (120–150 °C). It accounts for all transport and polarization phenomena, and the results compare well with published experimental data for equivalent operating conditions. Results for oxygen concentration and temperature variations are presented. The model predicts the oxygen depletion, which occurs in the catalyst area under the ribs, and which gives an indication of the catalyst utilization. Results also predict that for an output power density of 1 kW m−2, a cell temperature rise of up to 30 K can be expected for typical laboratory operating conditions. Parametric analyses indicate that significant gain in fuel cell performance can be expected by increasing the conductivity of the PBI membrane. Further, results demonstrate that when the catalyst region is well utilized, increasing the catalyst activity results in only a small improvement in performance.
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Lobato, J., P. Can˜izares, M. A. Rodrigo, J. J. Linares, and B. Sa´nchez-Rivera. "Testing Different Catalysts for a Vapor-Fed PBI-Based Direct Ethanol Fuel Cell." In ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2009. http://dx.doi.org/10.1115/fuelcell2009-85055.

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With the aim of improving the ethanol oxidation in fuel cells, researchers have developed numerous catalysts to break up the C-C bond. Most of the tests have been carried out at low temperature, using Nafion membrane as electrolyte. The cell performance of the Direct Ethanol Fuel Cells (DEFCs) at low temperature is still far from its industrial application. To improve the DEFC power density, high temperature operation (150–200 °C) has been suggested to promote the complete oxidation of ethanol. Thus, three different catalysts (Pt-Ru (1:1), Pt-Sn (1:1) and Pt-Sn-Ru (1:1:0.3), all of them supported on both non-activated and activated carbon were tested in H3PO4 doped PBI-based fuel cell, using vapour fed ethanol, operating in the range of 150–200 °C, and high ethanol concentration 6.7 M. The catalyst were synthesized using NaBH4 as reducing agent and were characterized by XRD, ICP-AES and TPR analyses. The best performance was reached at the highest temperature and with the catalyst based on Pt-Ru. The best results for the Ru-based catalyst can be explained by the higher level of alloying reached for the Ru than for Sn, which modifies the crystalline structure of Pt and enhances the activity oxidation of ethanol and of intermediates that are generated during the oxidation of ethanol.
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Guzas, Emily L., Stephen E. Turner, Matthew Babina, Brandon Casper, Thomas N. Fetherston, and Joseph M. Ambrico. "Validation of a Surrogate Model for Marine Mammal Lung Dynamics Under Underwater Explosive Impulse." In ASME 2019 Verification and Validation Symposium. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/vvs2019-5143.

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Abstract Primary blast injury (PBI), which relates gross blast-related trauma or traces of injury in air-filled tissues or those tissues adjacent to air-filled regions (rupture/lesions, contusions, hemorrhaging), has been documented in a number of marine mammal species after blast exposure [1, 2, 3]. However, very little is known about marine mammal susceptibility to PBI except in rare cases of opportunistic studies. As a result, traditional techniques rely on analyses using small-scale terrestrial mammals as surrogates for large-scale marine mammals. For an In-house Laboratory Independent Research (ILIR) project sponsored by the Office of Naval Research (ONR), researchers at the Naval Undersea Warfare Center, Division Newport (NUWCDIVNPT), have undertaken a broad 3-year effort to integrate computational fluid-structure interaction techniques with marine mammal anatomical structure. The intent is to numerically simulate the dynamic response of a marine mammal thoracic cavity and air-filled lungs to shock loading, to enhance understanding of marine mammal lungs to shock loading in the underwater environment. In the absence of appropriate test data from live marine mammals, a crucial part of this work involves code validation to test data for a suitable surrogate test problem. This research employs a surrogate of an air-filled spherical membrane structure subjected to shock loading as a first order approximation to understanding marine mammal lung response to underwater explosions (UNDEX). This approach incrementally improves upon the currently used one-dimensional spherical air bubble approximation to marine mammal lung response by providing an encapsulating boundary for the air. The encapsulating structure is membranous, with minimal simplified representation not accounting for marine mammal species-specific and individual animal differences in tissue composition, rib mechanics, and mechanical properties of interior lung tissue. NUWCDIVNPT partnered with the Naval Submarine Medical Research Laboratory (NSMRL) to design and execute a set of experiments to investigate the shock response of an air-filled rubber dodgeball in a shallow underwater environment. These tests took place in the 2.13 m (7-ft) diameter pressure tank at the University of Rhode Island, with test measurements including pressure data and digital image correlation (DIC) data captured with high-speed cameras in a stereo setup. The authors developed 3-dimensional computational models of the dodgeball experiments using Dynamic System Mechanics Advanced Simulation (DYSMAS), a Navy fluid-structure interaction code. DYSMAS models of a variety of different problems involving submerged pressure vessel structures responding to hydrostatic and/or UNDEX loading have been validated against test data [4]. Proper validation of fluid structure interaction simulations is quite challenging, requiring measurements in both the fluid and structure domains. This paper details the development of metrics for comparison between test measurements and simulation results, with a discussion of potential sources of uncertainty.
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Ono, M., R. Cesario, T. K. Chu, H. Herrmann, B. LeBlanc, T. Seki, W. Tighe, et al. "PBX-M ion Bernstein wave heating overview." In The tenth topical conference on radio frequency power in plasmas. AIP, 1994. http://dx.doi.org/10.1063/1.44937.

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Ono, M., G. J. Greene, and S. Bernabei. "Ion Bernstein wave heating experiments on PBX-M." In Radio−frequency power in plasmas. AIP, 1989. http://dx.doi.org/10.1063/1.38509.

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LeBlanc, B., M. Ono, W. Tighe, J. Dunlap, R. Bell, T. K. Chu, A. England, et al. "Density profile modification during IBW in PBX-M." In The tenth topical conference on radio frequency power in plasmas. AIP, 1994. http://dx.doi.org/10.1063/1.44938.

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Okabayashi, M., D. W. Ignat, S. C. Jardin, and Y. C. Sun. "Computational path to second stability in PBX-M." In The tenth topical conference on radio frequency power in plasmas. AIP, 1994. http://dx.doi.org/10.1063/1.44974.

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Sauthoff, N. R. "Plasma stability and confinement in the PBX-M tokamak." In 1990 Plasma Science IEEE Conference Record - Abstracts. IEEE, 1990. http://dx.doi.org/10.1109/plasma.1990.110599.

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Richards, Dylan, Frank Schwebel, Adrian Bravo, Matthew Pearson, and Cross-Cultural Addictions Study Team. "A Comparison of Engagement in Cannabis-related Protective Behavioral Strategies across Sex and Cultures." In 2020 Virtual Scientific Meeting of the Research Society on Marijuana. Research Society on Marijuana, 2021. http://dx.doi.org/10.26828/cannabis.2021.01.000.26.

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Cannabis-related protective behavioral strategies (PBS) are behaviors used before, during, and/or after using cannabis to reduce its associated harms. Despite the effectiveness of PBS in reducing both cannabis use and negative cannabis-related consequences, few studies have examined whether there are sex and cultural differences in PBS use. In the present study, we compare PBS use across males and females and across five countries. We also examine whether the associations of PBS use with cannabis-related outcomes differ by sex and country. We recruited 1,175 college students (63.3% female; Mage = 20.96, SD = 3.95; 45.1% Freshman, 20.2% Sophomore, 16.6% Junior, 9.7% Senior, 8.4% other) who reported past-month cannabis use from eight universities in five countries (U.S., Spain, Argentina, Uruguay, and the Netherlands) to complete an online survey. The online survey included the Marijuana Use Grid (MUG; Pearson & Marijuana Outcomes Study Team, 2020), Protective Behavioral Strategies for Marijuana scale (PBSM; Pedersen et al., 2016; revised by Pedersen et al., 2017), and Brief-Marijuana Consequences Questionnaire (B-MACQ; Simons et al., 2012). Results of a series of ANOVAs suggested differences across countries on the PBSM total score, F(4, 1,126) = 20.93, p < .001, such that participants in the U.S. (M = 4.53, SD = 1.11) and Spain (M = 4.48, SD = 0.95) endorsed the most frequent PBS use and participants in the Netherlands (M = 3.46, SD = 1.49) endorsed the least frequent PBS use. There were many item-level differences in PBS use across countries with a pattern similar to that for the PBSM total score. Results of a series of independent sample t-tests suggested that females (M = 4.51, SD = 1.11) scored higher than males (M = 4.17, SD =1.09) on the PBSM total score, t(1,123) = -4.88, p < .001, as well as nearly every item. The correlations between PBSM total score and cannabis-related outcomes across gender and countries were mostly in the expected direction: more frequent PBS use was associated with less cannabis use and fewer cannabis-related consequences. These correlations were largest for the U.S. sample. Interestingly, however, the correlation between the PBSM total score and B-MACQ was positive for the Argentina sample and every correlation between the PBSM total score and cannabis-related outcome was positive for the Netherlands sample. The results of the present study suggest there are several gender and cultural differences in the use of cannabis-related PBS. However, future studies are needed to replicate these findings, especially given the relatively small samples for some of the countries in the present study (our smallest sample size was for Uruguay [n = 46]). Gender and cultural differences in PBS use should be considered in developing and tailoring PBS interventions, especially because the PBSM was validated with a U.S. sample and most existing interventions were developed for use with U.S. participants.
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Bigelow, T. S., M. D. Carter, C. H. Fogelman, J. J. Yugo, F. W. Baity, G. L. Bell, W. L. Gardner, et al. "A folded waveguide ICRF antenna for PBX-M and TFTR." In The 11th topical conference on radio frequency power in plasmas. AIP, 1996. http://dx.doi.org/10.1063/1.49553.

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Reports on the topic "M-PBI"

1

Bell, R. E., S. Bernabei, N. Greenough, L. Lagin, B. Leblanc, M. Okabayashi, H. Takahashi, et al. Lower hybrid wave coupling in PBX-M. Office of Scientific and Technical Information (OSTI), July 1993. http://dx.doi.org/10.2172/6274813.

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Bell, R. E., S. Bernabei, N. Greenough, L. Lagin, B. Leblanc, M. Okabayashi, H. Takahashi, et al. Lower hybrid wave coupling in PBX-M. Office of Scientific and Technical Information (OSTI), July 1993. http://dx.doi.org/10.2172/10171894.

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Kugel, H. W., G. Gettelfinger, J. Semler, E. Thorsland, and J. Timberlake. Versatile TV system for PBX-M plasma control. Office of Scientific and Technical Information (OSTI), November 1994. http://dx.doi.org/10.2172/10196256.

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Kaye, S. M., H. Kugel, B. LeBlanc, S. Sesnic, J. L. Dunlap, L. Schmitz, and G. Tynan. An overview of PBX-M H-mode results. Office of Scientific and Technical Information (OSTI), April 1994. http://dx.doi.org/10.2172/10162596.

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Kaye, S. M., T. S. Hahm, S. Sesnic, W. Tang, P. Roney, W. Davis, J. L. Dunlap, and J. H. Harris. ELM-related fluctuations in PBX-M H-modes. Office of Scientific and Technical Information (OSTI), April 1994. http://dx.doi.org/10.2172/10162666.

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Takahashi, H., R. Bell, S. Bernabei, M. Chance, T. K. Chu, G. Gettelfinger, N. Greenough, et al. Accessibility for lower hybrid waves in PBX-M. Office of Scientific and Technical Information (OSTI), July 1993. http://dx.doi.org/10.2172/7368495.

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Takahashi, H., R. Bell, S. Bernabei, M. Chance, T. K. Chu, G. Gettelfinger, N. Greenough, et al. Accessibility for lower hybrid waves in PBX-M. Office of Scientific and Technical Information (OSTI), July 1993. http://dx.doi.org/10.2172/10169809.

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Sesnic, S., R. Kaita, S. Kaye, M. Okabayashi, R. E. Bell, H. W. Kugel, B. Leblanc, et al. Nonlinear coupling of low-n modes in PBX-M. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/10141649.

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Holland, A., E. T. Powell, and R. J. Fonck. Image reconstruction methods for the PBX-M pinhole camera. Office of Scientific and Technical Information (OSTI), March 1990. http://dx.doi.org/10.2172/7102065.

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Kugel, H. W., R. Bell, and S. Bernabei. Performance of the PBX-M passive plate stabilization system. Office of Scientific and Technical Information (OSTI), February 1994. http://dx.doi.org/10.2172/10129716.

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