15,415 research outputs found
Theorizing Audience and Spectatorial Agency
This chapter analyses Georgian audiences and spectatorial agency through several lenses: psychoanalytic film theory, theories of the public sphere and of mass publicity, and media studies of cultural convergence. The first section reads Georgian theatre’s heterogeneous playbills as a syntactical rendering of the audience, the imaginary community of the nation in process of negotiation. The second section shows theatrical paratexts blurring the boundary between theatre and coffee house, creating a theatrical public sphere in which the audience exercises daily public agency in saving or damning the play. The third section highlights the mingling of vulnerability and charisma in the celebrity prologue-speaker, a figure who both judges and entrances the audience while also embodying actors’ exposure to possible audience wrath. The final section looks at the theatres’ encouragement of spouting clubs as a means of channelling spectatorial agency
Drying of the disperse material in the aero spouted bed with horizontal material moving
Проведено аналіз діючих сушильних пристроїв, показані їх достоїнства й недоліки.. Розглянуто конструкцію сушильної установки з використанням киплячого прошарку з газоди-намічним транспортуванням матеріалу.Проведен анализ действующих сушильных устройств, показаны их достоинства и недостатки. Предложена конструкция сушильной установки с использованием кипящего слоя с газодинамической транспортировкой материала.The analysis of operating drying devices is carried out, their advantages and disadvantages are shown. The design of drying unit with use of a boiling layer and gasdynamic material transportation is offered
Fiber Orientation as a Means to Control Formation on the Ultra-Former Through Changes in the Spouting Jet to Wire Speed Ratio and Stock Consistency in the Headbox
The Ultra-Former is a new type of multi-ply board machine. It uses a cylinder mold without a vat and has a stock delivery system that uses a headbox similar to that found on a fourdrinier machine. The board made on the Ultra-Former has several improved qualities over the board made on the conventional type board machines. Of these several improved qualities formation is one of the most important.
Formation is important because it affects the physical properties of the finished product. One of the major physical properties affected is the tensile strength of the sheet. The tensile strength is reduced due to the higher probability of premature strain failure in areas of low fiber substance caused by poor formation.
Formation is change through the adjustment of five key machine variables found on the fourdrinier type headbox. The spouting jet to wire speed ratio and the consistency in the headbox are the most important of the five variables and the easiest to control.
This project involved the controlling of formation through fiber orientation as the most important variables, spouting jet to wire speed ratio and the consistency in the headbox are the most important of the five variables and the easiest to control.
This project involved the controlling of formation through fiber orientation as the most important variables, spouting jet to wire speed ratio and consistency in the headbox, are changed. The fiber orientation is deplicted by using a ratio between the machine direction (MD) tensile and cross machine direction (CM) tensile as determined using the zero span tensile test.
The results obtained indicate strongly that fiber orientation cannot be used for a formation control because the values are too random. At high degrees of fiber orientation the formation may be good one time and low at another time. Formation tended to be more dependent upon basis weight than fiber orientation
Characterization of the pneumatic behavior of a novel spouted bed apparatus
Recently the importance of spouted bed technology has significantly increased in the context of drying processes as well as granulation, agglomeration or coating processes. Particulate systems concerning very fine or non spherical particles that are difficult to fluidize, often cannot be treated in conventional fluidized beds. In contrast to those fluidized beds, the spouted bed technology with its specific flow structure offers the opportunity of stable fluidization under controlled conditions. Within this work the fluid dynamics of a novel spouted bed with two adjustable gas inlets is investigated. By analysis of gas fluctuation spectra by means of a fast Fourier transformation algorithm, different operation regimes are identified and depicted graphically. Furthermore, continuum CFD-modeling of the granular solid phase motion by means of an Euler/Euler approach and comparisons with experimental obtained velocity vector fields by means of particle image velocimetry (PIV) measurements will be presented in this work
A discrete particle simulation study on the influence of restitution coefficient on spout fluidized bed dynamics
In this paper the influence of the normal restitution coefficient on the bed dynamics\ud
during different flow regimes was studied using the discrete element model. The three flow\ud
regimes comprise the intermediate/spout-fluidization, spouting-with-aeration regime and the jetin-\ud
fluidized-bed. It is shown that with increase of the restitution coefficient the average bed\ud
height decreases for all flow regime cases. To study the influence of the granule impact velocity\ud
and the liquid film on the wall surface the free-fall experiments in the velocity range of 0.5-\ud
4.5 m/s were performed with spherical γ-Al2O3 granules. During the free-fall tests, the impact\ud
angle from 0° to 80° and the viscosity of thin liquid film in the range of 1-300 mPa·s were\ud
varied
Boston University Choral Ensembles, December 1, 2012
This is the concert program of the Boston University Choral Ensembles performance on Saturday, December 1, 2012 at 8:00 p.m., at the Boston University Concert Hall, 855 Commonwealth Avenue, Boston, Massachusetts. Works performed were Elegischer Gesang, op. 118 by Ludwig van Beethoven, Cantata No. 6, Flower Songs, op. 157 by Vincent Persichetti, At the Round Earth's Imagined Corners by Williametta Spender, Warum ist das Licht gegeben den Mühseligen from op, 74 by Johannes Brahms, and Ring out, wild bells from The Passing of the Year by Jonathan Dove. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund
Analysis of the fluidization behaviour and application of a novel spouted bed\ud apparatus for spray granulation and coating
Spouted beds are well known for their good mixing of the solid phase and for their intensive heat\ud
and mass transfers between the fluid phase and the solid phase. Nearly isothermal conditions are\ud
enabled which is of advantage for the treatment of granular solid materials in granulation,\ud
agglomeration or coating processes. In this work the hydrodynamic behaviour of a novel spouted\ud
bed apparatus with two horizontal and slit-shaped gas inlets is investigated by high-frequency\ud
recordings of the gas phase pressure fluctuations over the entire bed. The hydrodynamic stable\ud
operation domain, which is of importance for operating the apparatus, will be identified and\ud
depicted in the Re-G-Ar-diagram by Mitev [1]. Another focus of this work is the simulation of the\ud
spouting process by application of a continuum approach in FLUENT 6.2. The effect of the\ud
frictional stresses on the hydrodynamic behaviour is examined by performing simulations with and\ud
without consideration of friction. The angle of internal friction fi in Schaeffer`s [10] model will be\ud
varied and the simulation results will be compared with experiments. It was found that the influence\ud
of friction is not very big by application of the quite simple and empirical frictional viscosity model\ud
by Schaeffer [10] basing on soil mechanical principles. Also the simulation results under negligence\ud
of friction were similar to those under consideration of friction. Another part of this work is the\ud
industrial application of the novel spouted bed in granulation and coating processes. Compared to\ud
classical fluidized beds, a much narrower particle size distribution, a higher yield and a higher\ud
product quality was obtained in the novel spouted be
Processing of Rosmarinus officinalis linne extract on spray and spouted bed dryers
This article presents an investigation of the potential of spray and spouted bed technology for the production of dried extracts of Rosmarinus officinalis Linné, popularly known as rosemary. The extractive solution was characterized by loss on drying, extractable matter and total phenolic and flavonoid compounds (chemical markers). The product was characterized by determination of loss on drying, size distribution, morphology, flow properties and thermal degradation and thermal behavior. The spray and spouted bed dryer performance were assessed through estimation of thermal efficiency, product accumulation and product recovery. The parameters studied were the inlet temperature of the spouting gas (80 and 150ºC) and the feed mass flow rate of concentrated extract relative to the evaporation capacity of the dryer, Ws/Wmax (15 to 75%). The atomizing air flow rate was maintained at 20 l/min with a pressure of 196.1 kPa. The spouting gas flow rate used in the drying runs was 40% higher than the gas flow under the condition of minimum spouting. The spray drying gas flow rate was fixed at 0.0118 kg/s. Under the conditions studied, performance in the spray and spouted bed drying of rosemary extract was poor, causing high degradation of the marker compounds (mainly the phenolic compounds). Thus, process improvements are required before use on an industrial scale.FAPESPCNPq - IM-INOFA
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