Relevant bibliographies by topics / Two flute

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

Academic literature on the topic 'Two flute'

Author: Grafiati
Published: 4 June 2025
Last updated: 23 June 2025

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Journal articles on the topic "Two flute"

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Bholuram Gurjar, P. K. Sahoo, and Adarsh Kumar. "Design and Development of Variable Rate Metering System for Fertilizer Application." Journal of Agricultural Engineering (India) 54, no. 3 (2024): 12–21. http://dx.doi.org/10.52151/jae2017543.1627.

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A variable rate fertilizer metering mechanism was designed by changing the speed of the feed shaft for use in variable rate fertilizer applicator. A micro-controller unit programmed with a Pulse Width Modulation (PWM) motor driver was used to run the feed shaft for varying speeds. Two types of fluted rollers (straight and helical flute) were used with varying number of flutes having same volume for each fluted roller. No significant difference in discharge rate between helical and straight fluted roller was observed with varying number of flutes (6, 8, 10, and 12). However the discharge rate of SSP fertilizer was significantly higher than that for DAP. Also, significant difference was observed in applied torque and power requirement for straight and helical flute.
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Srinivasan, Vijayaragham, Kambiz Vafai, and Richard N. Christensen. "Analysis of Heat Transfer and Fluid Flow Through a Spirally Fluted Tube Using a Porous Substrate Approach." Journal of Heat Transfer 116, no. 3 (1994): 543–51. http://dx.doi.org/10.1115/1.2910905.

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An innovative approach was opted for modeling the flow and heat transfer through spirally fluted tubes. The model divided the flow domain into two regions. The flutes were modeled as a porous substrate with direction-dependent permeabilities. This enabled modeling the swirl component in the fluted tube. The properties of the porous substrate such as its thickness, porosity, and ratio of the direction-dependent permeabilities were obtained from the geometry of the fluted tube. Experimental data on laminar Nusselt numbers and friction factors for different types of fluted tubes representing a broad range of flute geometry were available. Experimental data from a few of the tubes tested were used to propose a relationship between the permeability of the porous substrate and the flute parameters, particularly the flute spacing. The governing equations were discretized using the Finite Element Method. The model was verified and applied to the other tubes in the test matrix. Very good agreement was found between the numerical predictions and the experimental data.
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Wang, Jianxiao, Wei Sun, Petru Aurelian Simionescu, and Yuanjin Ju. "Optimization of the Fluted Force-Feed Seeder Meter with the Helical Roller Using the Discrete Element Method and Response Surface Analysis." Agriculture 13, no. 7 (2023): 1400. http://dx.doi.org/10.3390/agriculture13071400.

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The seed metering process of a fluted force-feed seeder was simulated using the Discrete Element Method and its parameters optimized using the Box–Behnken Design of Experiments and the Response Surface Method. The rotational speed of the feed roller, the lead (helix) angle of the flutes, and the number of flutes were the independent variables, while the response value was the seeding uniformity index. Two regression models were investigated, and the following conclusions drawn. For the flute lead angle between 0 and 10 degrees, and the number of flutes between 10 and 14, it was found that the number of flutes and the lead angle influenced the seeding performance the most, with the order of importance being the (i) number of flutes, (ii) lead angle and (iii) roller speed. For the flute lead angle between 5 and 15 degrees, and the number of flutes between 12 and 16, it was found that the roller speed and the number of flutes influenced the seeding performance the most, with the order of importance being the (i) roller speed, (ii) number of flutes and (iii) flute lead angle. The two regression models were then minimized for the seeding uniformity index and the corresponding optima verified experimentally on a conveyor belt test stand fitted with an image recognition system.
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Ramsey, Gordon P., and Amanda Newton. "A comparative study of flutes I." Journal of the Acoustical Society of America 156, no. 4_Supplement (2024): A68. https://doi.org/10.1121/10.0035143.

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This is part one of two presentations on the same project. Various types of flutes have been used for centuries and they are popular in many genres of music. We have done a comparative study of six different flute type instruments to determine what factors play a role in their differences in timbre. The effects of flute geometry, type of mouthpiece, body size, and material were considered on how each affected their sounds. The study included an orchestral flute, a piccolo, two Native American flutes, and two recorders. Measurements were taken at the Loyola acoustics lab and the anechoic chamber at Northwestern. This talk will present theoretical basis for our measurements, including impedance calculations, and will discuss the observations for the individual instruments. The following talk will discuss the comparative study and how our results contribute to selection of the appropriate flute to use in different genres.
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Stein, Robert. "Proms 2014: Holt and Widmann." Tempo 69, no. 271 (2015): 78–79. http://dx.doi.org/10.1017/s0040298214000722.

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How many flutes are there in Simon Holt's flute concerto Morpheus Wakes? Nominally one, here the amazing Emanuel Pahud, but more usefully two or more. Scored for alto as well as standard flute, Holt exploits the timbral possibilities of both while ensuring that the orchestra's own flautist (doubling bass flute) and alto flautist (doubling piccolo) continue the idea of ‘two-in-one’ so central to his other recent concerto Centauromachy for clarinet, flugelhorn and orchestra written in 2010 and given its London premiere at the 2011 Proms.
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Mohd Abbas, Norliana, Muhammad Azriq Haikal Azahari, Muhammad Najib Ibrahim Mat Zaki, and Zanuar Ahmad. "INVESTIGATION ON THE END MILLING CUTTING IN MACHINING POLYVINYL CHLORIDE (PVC) FOAM BOARD FOR ISLAMIC ART." International Journal of Education, Psychology and Counseling 9, no. 53 (2024): 584–90. http://dx.doi.org/10.35631/ijepc.953044.

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The polyvinyl chloride (PVC) foam board is utilized for decorative purpose such as a backdrop stand or three-dimensional (3-D) model. Some of the advantages are lightweight, mobile and ease in adding realistic details through printing or machining. The Selangor Islamic International Arts Complex employs the PVC foam board to create 3-D Islamic art for mosque ornamentation. However, the quality of the product produced does not meet the required quality and rework need to be done when the two flutes end mill cutting tool is used. This study focuses on identifying the reason of the unexpected surface finish and proposing method to improve the quality of the pattern produced. The investigation was done by comparing the pattern exhibits after a four continuous hours of machining between two flutes and single flute of end mill tool under the same parameter setting. It was found that, the single flute end milling yielded good surface finish compared to the two flutes which exhibit burrs and rough surface finish. This is because the single flute end mill tool gives lower friction and less heat during machining and facilitating proper chip removal in comparison to the two flutes end mill tool.
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Powell, Ardal. "The Hotteterre Flute: Six Replicas in Search of a Myth." Journal of the American Musicological Society 49, no. 2 (1996): 225–63. http://dx.doi.org/10.2307/831990.

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Three instruments attributed to "Hotteterre" are considered the earliest baroque flutes. But two of these, once in the collection of César Charles Snoeck, prove to be copies, made at different times in the nineteenth century in La Couture-Boussey, Normandy. These, and other replicas made for the Brussels Conservatory and Dayton C. Miller collections, have fostered the growing myth of the "Hotteterre flute." Recently discovered flutes by Richard Haka and others argue against the presumption that the baroque flute was a sudden invention. New and wider studies of seventeenth-century woodwind instruments throughout Europe are beginning to indicate that the flute underwent a process of change far more complex than previously thought.
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Newton, Amanda, and Gordon P. Ramsey. "A comparative study of flutes II." Journal of the Acoustical Society of America 156, no. 4_Supplement (2024): A69. https://doi.org/10.1121/10.0035144.

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This is part two of the previous presentation on flute acoustics. This talk will expand on the individual observations of each of the six flutes to include a cross-instrument comparison. Factors used in the comparison include instrument range, material, geometry, and instrument types. Findings conclude that material had the predicted effect on tone and geometry was more significant than predicted. Additional findings and confirmation of these from the NW anechoic chamber will be discussed, as well. These comparative findings are significant as they provide insight into the physics of the sound produced in each instrument and how that contributes to the unique tone of each instrument. This is significant for musicians, including flute players and composers, as predicting and manipulating the tone of different flutes is instrumental in making music, from knowing how to make, play, and compose for flutes, including when choosing what flute instruments are applicable in certain musical settings. This talk will also discuss possible extensions of this project, including to extended members of the flute family, and more note ranges tested on each instrument.
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Kachmarchyk, Volodymyr, and Nataliia Kachmarchyk. "A “Well-tempered Flute” by T. Boehm – The Final Stage of its Evolution and the Standardization of its Tuning System." Studia Universitatis Babeş-Bolyai Musica 67, Special Issue 1 (2022): 49–62. http://dx.doi.org/10.24193/subbmusica.2022.spiss1.04.

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"The article is dedicated to the development of the flute acoustic and tuning systems during the 18th-19th centuries. Based on the analysis of J. J. Quantz's treatise »Versuch einer Anweisung, die Flöte traversiere zu spielen« and the flute of its construction with two enharmonically unequal keys Es and Di s, the intonation and technological features of using pure tuning system in playing an instrument are revealed. Following Quantz’s ideas was another German musician, the Leipzig master instrument maker J. G. Tromlitz. He strongly recommended maintaining the dominant position of the pure tuning system while performing on the flute. The defining stage in the development of the flute design and the establishment of the well-tempered tuning system as the basis of its acoustic features was the reform of T. Boehm. The models of the inverse conical bore flute with open ring keys (1832) and the cylindrical flute with flap keys (1847) created step-by-step give evidence of the evolution of T. Boehm's views on expanding the sound dynamics and improving the intonation capabilities of the instrument. Keywords: Boehm’s flute, pure tuning system, equal temperament, conical flute, cylindrical instrument, acoustic system, key mechanics. "
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Dyakonov, M. I., and M. S. Shur. "Two dimensional electronic flute." Applied Physics Letters 67, no. 8 (1995): 1137–39. http://dx.doi.org/10.1063/1.114986.

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Dissertations / Theses on the topic "Two flute"

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Cannon, Angela Renee Fredrickson William E. "A preliminary study of the effectiveness of two breath management exercises on three aspects of flutists' performance duration, breath control, and tone quality /." Diss., UMK access, 2005.

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Thesis (D.M.A.)--Conservatory of Music. University of Missouri--Kansas City, 2005.<br>"A dissertation in performance, flute." Advisor: William E. Fredrickson. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed Nov. 13, 2007. Includes bibliographical references (leaves 178-183). Online version of the print edition.
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Edwards, Peter Ivan Edwards Peter Ivan. "Two explorations in musical objects /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2005. http://wwwlib.umi.com/cr/ucsd/fullcit?p3170275.

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Thesis (Ph. D.)--University of California, San Diego, 2005.<br>Includes 2 compositions: Puer natus est nobis (zu irgendeiner Zeit) for full orchestra, and Annicha, for flute, clarinet, and piano. Vita. Includes audio reel tape of compositions (analog, stereo., 7 1/2 ips : 7 in.).
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Okajima, Shuri. "A Comparison Between the Two Works for Flute, Viola, and Harp by Toru Takemitsu and Claude Debussy: Influences of Debussy on Takemitsu and Similarities Between the Two Composers." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/194224.

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This study serves as a comparison between the two works for flute, viola, and harp by Toru Takemitsu and Claude Debussy; influences of Debussy on Takemitsu and similarities between the two composers. It examines how cultural influences from both Japan and France affected each composer, and explores how other artists and composers impacted their writing. Particular focus will be put on Takemitsu's philosophical aesthetics, especially in his later years, and a comparative analysis between the two composers' trios, which include the harp. This study will present a comparative analysis of Takemitsu's trio, And then I knew 'twas Wind for Flute, Viola, and Harp, and Debussy's Sonata for Flute, Viola, and Harp, pointing out similarities and possible influences upon the composers, focusing on elements indicated in the score and writings by and about the composers.
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Cunningham, Jennifer Ann Reinert. "A critical edition of Johann Christoph Schultze’s Six sonatas for two flutes without basso and a chaconne for two equal voices in canon." Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/1578.

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By the eighteenth century, the business of music publishing in Europe had exploded. Europe had become more culturally international, and interest in purchasing and performing music written by foreign composers was in vogue. Unfortunately laws governing copyright and editing of music were either difficult to enforce or non-existent, and most were not applicable on an international level. Around 1750 music publishers Leclerc and Boivin published an edition of flute sonatas in Paris. This edition was attributed to Georg Friderich Handel, whose work, at the time, was the most sought after in Western Europe. This particular collection is identical to an earlier edition published in 1729 in Hamburg, Germany by an unknown German composer, Johann Christoph Schultze. This paper is the first modern critical edition of Schultze’s Six Sonate â Doi Flauti Traversi Senza Basso Con una Ciacconna tra mischiata di doi Canoni nella medesima nascosti (Six Sonatas for Two Flute without Basso and A Chaconne for Two Equal Voices in Canon) and marks the first time the Chaconne has appeared in modern notation. The edition aims to be as true as possible to the 1729 publication, notes standard performance practices, and answers the question as to why the 1750 edition may have been falsely attributed to Handel.
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Ruppe, Elizabeth Ambler. "Form and tonality as elements of neoclassical style in two works by Jean Francaix: Divertimento pour flute et piano (1955) and Suite pour flute seule (1963) with three recitals of selected works of Mozart, Widor, Feld, Muczynski and others." Thesis, University of North Texas, 1996. https://digital.library.unt.edu/ark:/67531/metadc278680/.

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The music of Jean Francaix is well known to those familiar with woodwind chamber literature. His long, successful career began in the 1930s when French composers rejected the excessively chromatic harmonies, intense emotionalism and grandiose proportions of late Romantic music. Embracing the concepts of neoclassicism, economy of means, clarity and objectivity, and a return to diatonicism and formal structures, the new "Classical" music contained the added spice of twentieth-century harmonic techniques including bitonality, modality, and quartal and quintal harmonies. Francaix has written many concertos and solos for woodwind instruments, but his enduring popularity resides in his chamber music for various combinations. His publisher for the last six decades has been B. Schott's Sohne who commissioned Francaix to write several chamber works in honor of his eightieth birthday. Two of his works for flute, Divertimento pour flute et piano and Suite pour flute seule, are known to professional flutists but not considered standards in the flute repertoire. The purpose of this paper is to call attention to the wide variety of Francaix's repertoire which is eminently suitable for concert and recital programming. The identification of formal and tonal elements in Francaix's two works for flute helps to place his prodigious output within the context of the prevailing musical and philosophical aesthetic in France of the 1920s through 1940s. An annotated list of Francaix's works with flute in a primary role is included as an appendix.
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Ti, Yu-ju. "Duo Sonatas and Sonatinas for Two Clarinets, or Clarinet and Another Woodwind Instrument: An Annotated Catalog." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243880660.

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Stirzaker, Kim E. (Kim Elizabeth). "Structure and Form in Two Late Works for Flute and Orchestra by Ernest Bloch (1880-1959): Suite Modale (1956) and Two Last Poems (Maybe. . .) (1958) -- a Lecture Recital, Together With Three Recitals of Selected Works of J.S. Bach, Jolivet, Mozart,and Others." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc278196/.

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The lecture was presented on November 18, 1991. This presentation focused on the only two compositions for solo flute and orchestra by Ernest Bloch. Written during the last three years of the composer's life, the pieces are representative of his last style period. While Suite Modale is neobaroque in style, Two Last Poems is much more subjective. Together they represent a synthesis of many of the stylistic characteristics of Ernest Bloch. The musical parameters discussed included form, melody, texture, rhythm, harmony, and expressive devices.
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Kesner, Lori Ann. "Krishna meets Pan Indian-Western fusion in two works for flute and harp by Ravi Shankar and John Mayer /." Cincinnati, Ohio : University of Cincinnati, 2006. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1154446863.

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Thesis (Dr. of Musical Arts)--University of Cincinnati, 2006.<br>Title from electronic thesis title page (viewed Oct.10, 2006). Includes abstract. Keywords: Ravi Shankar; John Mayer; Nava Rasa; Enchanted Dawn; L'aube enchantee Includes bibliographical references.
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KESNER, LORI ANN. "KRISHNA MEETS PAN: INDIAN-WESTERN FUSION IN TWO WORKS FOR FLUTE AND HARP BY RAVI SHANKAR AND JOHN MAYER." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1154446863.

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Krystal, Kuhns R. "Organizational Principles in Two of George Crumb's Chamber Works with Flute: Madrigals, Book II and Federico's Little Songs for Children." Kent State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=kent1309128280.

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Books on the topic "Two flute"

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Mumford, Jeffrey. Filaments: For two flutes. T. Presser, 1998.

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Schocker, Gary. Dangerous duets: For two flutes. T. Presser, 1995.

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Müller, August Eberhard. Journal pour la flûte: Für 2 Flöten = for two flutes. Universal Edition, 1985.

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Bordner, Gerald. Synergism: For two flutes. Southern Music Co., 1987.

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List, Erich, and Willi Pretzsch. Old and new duets: For two flutes. Masters Music Publications, 1995.

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Kuhlau, Friedrich. Three virtuoso duets: For two flutes, opus 102. McGinnis & Marx, 1987.

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Fauré, Gabriel. Nocturne for flute, two oboes, two clarinets, two horns, and two bassoons, op. 33, no. 1. Masters Music Publications, 1998.

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Kaebitzsch, Garry. Twenty-two flute repair tips for the player. Free Bee Publication, 1986.

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Cage, John. Two: Parts for flute and piano : April 1987. C.F. Peters, 1987.

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Boismortier, Joseph Bodin de. Concerto h-Moll für zwei Soloinstrumente (Querflöte und Violine, zwei Querflöten, Querflöte und Oboe), Streicher (drei Violinen) und Basso continuo oder für zwei Soloinstrumente und Basso continuo =: Concerto in B minor for two solo instruments (flute and violin, two flutes, flute and oboe), strings (three violins) and basso continuo or for two solo instruments and basso continuo, op. 21/4. Bärenreiter, 1988.

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Book chapters on the topic "Two flute"

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Praful, K., and B. Sudarshan. "Experimental study on two-octave Indian flute acoustics." In Aerospace and Associated Technology. Routledge, 2022. http://dx.doi.org/10.1201/9781003324539-16.

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Forbes, Andrew B. "Liver fluke." In Parasites of cattle and sheep: a practical guide to their biology and control. CABI, 2021. http://dx.doi.org/10.1079/9781789245158.0149.

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Ding, Hao, Ke Li, and Liang Cheng. "Two-Dimensional Flume Model Experiments of Submerged Floating Tunnels." In Submerged Floating Tunnel Model Experiment Under Wave-Current Field. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-7304-6_4.

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Penny, Jean. "Performing intercultural music for flute and electronics." In The Routledge Companion to Music, Autoethnography, and Reflexivity. Routledge, 2024. https://doi.org/10.4324/9780429330049-4.

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Dincauze, Dena F. "Fluted Points in the Eastern Forests." In From Kostenki to Clovis. Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-1112-4_20.

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Forbes, Andrew B. "The lancet or lanceolate fluke." In Parasites of cattle and sheep: a practical guide to their biology and control. CABI, 2021. http://dx.doi.org/10.1079/9781789245158.0217.

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Clark, Kate, and Amanda Markwick. "Music Suitable for Two Flutes." In The Renaissance Flute. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190913335.003.0008.

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Chapter 8 presents our own editions (in score format) of music for two flutes. (Individual parts can be downloaded from the accompanying website.) Many renaissance duets were intended as instructional pieces for learning the modes, but we have selected bicinia that also stand as strong performance pieces. Some pieces are for two tenor flutes, others for tenor and bass. An introduction to each piece presents the mode and useful tips for flutists approaching these works for the first time. Each piece also includes a hexachordal analysis and text (when applicable).
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Solum, John, and Anne Smith. "Some Historical Considerations." In The Early Flute. Oxford University PressOxford, 1992. http://dx.doi.org/10.1093/oso/9780198162537.003.0001.

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Abstract Of all the musical instruments which we call ‘modern’, perhaps none has changed more radically from its historical precursors than the transverse flute. To begin with, a visual comparison alone offers striking differences. The modern flute is usually made of metal and has complicated fingering mechanisms soldered to the tube. Renaissance, baroque, and classical flutes, on the other hand, are made of wood or ivory and are notable for their simplicity of design and comparative lack of mechanical devices. For much of the first half of the twentieth century (especially in the period between the two World Wars), the old-style flute was generally considered to be a historical curiosity and a museum piece. These were the years when the Boehm-style flute achieved virtually universal acceptance by professionals.
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Solum, John, and Anne Smith. "Bringing It All to Life: Advice to the Contemporary Player." In The Early Flute. Oxford University PressOxford, 1992. http://dx.doi.org/10.1093/oso/9780198162537.003.0010.

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Abstract The flute treatises from the eighteenth and nineteenth centuries contain sufficient instruction to enable the old instrument to be played well by contemporary players without requiring a comparative knowledge of the modern flute. However, many modern traverso-players have come to the instrument from the Boehm flute, and many will continue to do so. Comparisons between the two types of flutes can be helpful. Such basic musical concepts as tone, pitch, intonation, tuning and temperament, acoustics, articulation, vibrato, tempo, and notation should be reconsidered by the modern player when preparing to learn the traverso because these concepts may have somewhat different meanings to the modern player from those they had to flautists in previous centuries.
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Morowitz, Harold J. "A Two-Coffee Culture." In Entropy and the Magic Flute. Oxford University PressNew York, NY, 1993. http://dx.doi.org/10.1093/oso/9780195081992.003.0018.

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Abstract I Was Quietly Studying my Linguaphone German book one evening and was startled to have Frau Pfaffinger state, “Kaffee schadet meiner Gesundheit.” The rough translation, “Coffee harms my health,” reminded me that I am behind on my triennial analysis of the medical literature on coffee. I carry out this periodic ritual to prepare myself for the many discussions I seem to get into on coffee and the state of health.
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Conference papers on the topic "Two flute"

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Dille, Eldon R. "Unusual Chemical Compounds in Flue Gas Desulfurization Systems." In CORROSION 1996. NACE International, 1996. https://doi.org/10.5006/c1996-96461.

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Abstract Flue gas desulfurization (FGD) systems continue to have deposits formed on internal surfaces of the materials of which the FGD systems are fabricated. These compounds contribute to crevice corrosion of the alloys of which some of the FGD systems are made. In the process of performing the failure analysis of the FGD fabrication materials, new compounds were discovered. This paper discusses two corrosion failure analysis case histories and the new compounds that were discovered and the chemical environment in which they were discovered.
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Zauter, R., and T. L. Ladwein. "Recent Experiences with Stainless Steels in Flue Gas Desulfurization Plants." In CORROSION 2000. NACE International, 2000. https://doi.org/10.5006/c2000-00579.

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Abstract Stainless steels in FGD installations provide the necessary corrosion resistance in the acidic and chloride containing environments and have been used since more than two decades as construction material for absorber towers. The paper presents stainless alloy material concepts for the double loop absorber in coal and lignite fired power stations. The different corrosive zones of the double loop absorber and the selection of corrosion resistant stainless steels are discussed. Expertise won over fifteen years and recent experiences in successful application of stainless steels lead to new reliable material selection guidelines.
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Lopez-Lopez, D., and A. Wong-Moreno. "Unusual Refinery Boiler Tube Failures Due to Corrosion by Sulfuric Acid Induced by Steam Leaks." In CORROSION 1998. NACE International, 1998. https://doi.org/10.5006/c1998-98720.

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Abstract Corrosion by sulfuric acid in boilers is a low probability event because gas temperature and metal temperature of boiler tubes are high enough to avoid the condensation of sulfuric acid from flue gases. This degradation mechanism is frequently considered as an important cause of air preheaters materials degradation, where flue gases are cooled by heat transfer to the combustion air. Corrosion is associated to the presence of sulfuric acid, which condensates if metal temperature (or gas temperature) is below of the acid dew point. In economizer tubes, sulfuric acid corrosion is an unlikely event because flue gas and tube temperatures are normally over the acid dewpoint. In this paper, the failure analysis of generator tubes (similar to the economizer of bigger boilers) of two small oil-fired subcritical boilers is reported. It is concluded that sulfuric acid corrosion was the cause of the failure. The sulfuric acid condensation was due to the contact of flue gases containing SO3 with water-steam spray coming from leaks at the interface of rolled tube to the drum. Considering the information gathered from these two cases studied, an analysis of this failure mechanism is presented including a description of the thermodynamics condition of water leaking from the drum, and an analysis of the factors favouring it.
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Asphahani, A. I., S. J. Matthews, and W. L. Silence. "Alloy Selection for Reheater Tubes in Flue Gas Desulfurization Systems." In CORROSION 1988. NACE International, 1988. https://doi.org/10.5006/c1988-88010.

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Abstract Service performance of reheater systems has been less than desirable in several flue gas desulfurization (FGD) units. The selection of proper alloys for optimum corrosion resistance is a key issue. Available results from high-nickel alloy evaluations suggest that optimum corrosion resistance has not been fully achieved. The conclusions state that alloy 625 had low general corrosion rate but suffered severe localized attack, while alloy C-276 did not undergo any localized attack but exhibited poor resistance to general corrosion. An alloy offering both low general corrosion rate and good resistance to localized attack has not yet been successfully identified. Recent advances in nickel-based alloy development have characterized two new improved materials to resist corrosion: HASTELLOY® alloys C-22 and H-9M. Pertinent laboratory tests were conducted to evaluate these new alloys and to assist in materials selection for reheater tubes. Data on alloy 625, alloy C-276, H-9M™ alloy and C-22™ alloy are presented and compared. The results confirm the advantage of H-9M alloy over that of alloy 625 and the better corrosion resistance of C-22 alloy compared to that of alloy C-276. The improved performance of C-22 alloy is maintained in the as finned and the as finned plus annealed tubular products.
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Rosenberg, H. S., and B. C. Syrett. "Effect of Environment on Coatings in FGD Ductwork." In CORROSION 1996. NACE International, 1996. https://doi.org/10.5006/c1996-96451.

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Abstract A partial factorial experimental design was implemented to determine the main effects of 16 environmental factors on the performance of coatings used for outlet ducts in wet FGD systems. Suppliers applied their coatings, which included three epoxies, two vinyl esters, two fluoropolymers, and a polyester, on 7 in. by 7 in. (17.8 cm by 17.8 cm) carbon steel panels. Panels with and without a vertical weld bead were used. Each coated panel was exposed under isothermal conditions to one of 24 simulated outlet duct environments created in 12 specially designed fog chambers. A total of 384 panels were exposed for 400 hours each, split between two exposure periods. Coating performance was monitored in situ by means of periodic electrochemical impedance measurements. Statistical analysis was used to determine the main effects of temperature, flue gas components, and flue gas condensate components. Detailed examples of practical use of the data are provided.
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Caudill, Dan L., and Gerhardus H. Koch. "Corrosion of Carbon Steel Substrate under Alloy C-276 Wallpaper." In CORROSION 1996. NACE International, 1996. https://doi.org/10.5006/c1996-96450.

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Abstract Flue gas desulfurization (FGD) systems or wet scrubbers are essentially chemical plants, which are used to reduce sulfur dioxide (SO2) emissions from coal fired power plants. The most common process involves wet limestone scrubbing. The scrubbed flue gas is discharged from the scrubber modules into an outlet duct that leads into the stack. The scrubbed flue gas enters the outlet duct at its adiabatic saturation temperature and, as a result, a considerable amount of condensation occurs on the duct walls. The condensate usually contains various mineral acids and many dissolved ions, which makes the condensate very corrosive. Following start up of two FGD systems, leaks were experienced in the welds of the C-276 wallpaper. In order to address the concern that absorber liquid or outlet duct condensate would cause unacceptable corrosion of the carbon steel shell, laboratory experiments were conducted. The results of these experiments demonstrated the indeed under certain conditions, significant corrosion of the carbon steel could occur.
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Asteman, Henrik, Patrick Keil, Walter Hartnagel, Else Müller-Lorenz, and Dietlinde Jakobi. "High Temperature Corrosion of Burner Tube Alloys Exposed to Flue Gas and Reducing Atmosphere Used for Annealing – A Laboratory Study." In CORROSION 2011. NACE International, 2011. https://doi.org/10.5006/c2011-11191.

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Abstract A demand for greater throughput and quality causes a ditto demand for higher temperatures in the annealing furnaces. The burners used for this application are already operating close to their upper temperature limit. This causes increased wear of the materials used in the burners and shortens their lifetime considerably. The wear is caused by several factors such as creep and high temperature corrosion. The burners are in contact with two distinct types of atmospheres, the flue gas inside the burner and the annealing gas on the outside. The latter could be either H2+N2 mixtures, H2, Ar or air. One way to increase the lifetime could be to use Al2O3 forming alloys instead of Cr2O3 formers. In this study the high temperature corrosion behaviour in flue gas as well as annealing gas of two such alloys has been investigated on lab scale. The alloys involved were spun cast 60 HT R (Al2O3) and G-NiCr28W (Cr2O3), they were exposed in a synthetic flue gas: 5.6%O2/14.7%H2O/8.1%CO2/71.6%N2, at 1100 °C and 1200 °C for up to 504 h. Centralloy® 60 HT R, NiCr25FeAlY, G-NiCr28W and GX40CrNiSiNb 26-35 were exposed to an annealing gas: 25%H2/75%N2 with traces of O2, at 1000°C for 504 h. The exposed samples were analysed by TG, SEM/EDX and GI-XRD.
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Pang, Liping, Shangmin Li, Hu Yuan, and Liqiang Duan. "Study on Gas-Liquid Two-Phase Flow Distribution Inside a Flute Header." In ASME 2020 Power Conference collocated with the 2020 International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/power2020-16710.

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Abstract When the supercritical boiler is working at low load during flexible operation, the uneven distribution of the gas-liquid flow at the intermediate header may affect the safety of the water-cooled wall at the vertical parallel panels. In order to improve the uniformity of gas-liquid flow distribution in the water-cooled wall of intermediate header and study the internal flow mechanism, a flute inside the header is applied with parallel vertical parallel channels and experiments under different operating conditions are conducted to verify the effectiveness of this geometrical structure. The flow pattern in the experiment belongs to stratified and wavy flow. Computational fluid dynamic (CFD) simulation is conducted in order to investigate two-phase flow distribution behavior inside a flute header. It was found that the radial gas phase distribution in the flute tube shows a symmetrical relationship, and there are two vortexes in opposite directions. With the increasing distance from the inlet, the uniformity of the gas phase distribution becomes even. The gravity is greater than the drag force, which has effect on the two-phase flow distribution. The gas phase velocity has been improved inside flute section and liquid phase flow has more even flow distribution along annular section. It makes liquid phase sent to far end of flute header. That benefits two-phase flow distribution along 10 parallel channels equally.
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DENKENA, B. "Manufacturing of graded grinding wheels for flute grinding." In Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-132.

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Abstract. In this paper, two different methods for manufacturing of graded grinding wheels for two different metal bonds are presented. One method is based on the use of a mask and manual moulding and the other on a height-adjustable holder for moulding. For this purpose, a brittle and a ductile bronze bond are compared. The graded grinding wheels are fabricated through sintering with Field Assisted Sintering Technology (FAST). An analysis of the grain distribution is used to demonstrate the reproducibility of the manufacturing methodology. For analysis, light microscope images of cross-sections of the abrasive layers are taken. The grain distribution is determined using image processing software and a greyscale method. Finally, the advantages of each method are compared. As a result, both manufacturing methods are evaluated in terms of precision, feasibility and efficiency. From this, a recommendation on the implementation and further development of the methods is derived. This method enables the manufacturing of graded grinding wheels for an effective reduction of wear differences for grinding cemented carbide end mill cutters.
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Malcoci, Ion. "New techniques of interpretation in faux-bourdon 68 for pan flute solo by Daan Manneke." In International scientific conference "Valorization and preservation by digitization of the collections of academic and traditional music from the Republic of Moldova". Academy of Music, Theatre and Fine Arts, Republic of Moldova, 2023. http://dx.doi.org/10.55383/ca.09.

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This article refers to the piece for solo pan flute less known to us, by the Dutch composer Daan Manneke, written in 1997, when this instrument was enjoying great popularity in Western countries. The author presents an interpretative analysis of this work, from the perspective of the use of new, innovative techniques for the art of the contemporary Romanian nai(pan flute), which represents data on the history of the appearance of this work in the European cultural and musical context, as an example: various interpretative treatments such as the interpretation of two voices simultaneously on the nai and new musical effects, in the interpretative version of the Dutch pan flute player Matthijs Koene, etc. The appearance of a creation for the pan flute is not accidental in this country, as the pan flute has become a much-loved instrument in the Netherlands, with a pan flute class currently operating at the Amsterdam Conservatory. Daan Manneke's creation is also distinguished by the fact that the artist tackles a whole range of traditional instruments.
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Reports on the topic "Two flute"

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Kerr, D. E. Reconnaissance surficial geology, Clarke River, Northwest Territories, NTS 65-M north. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329416.

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The Clarke River map area (north half) comprises isolated areas of glacially and meltwater scoured bedrock, till veneers and blankets, locally fluted, and strongly fluted (mega-scale glacial lineations) streamlined till in the northeast. Ridged till may overlie fluted till blanket and streamlined till. Glaciofluvial esker complexes and associated meltwater outwash sediments trend westward (some may parallel pre-glacial valleys), southwestward, and northwestward. Glaciolacustrine sediments are a minor component. An early regional warm-based diverging southwestern and southern ice flow is well preserved in the central regions across the map area. The youngest late deglacial ice flows, in the extreme southwest and broader northeast region, are both northwesterly. The latter represents the Dubawnt Lake ice stream. During ice retreat, ridged till was deposited with minor moraines and larger recessional moraines locally. Ponding meltwater formed pro-glacial lakes with deltas, beaches, and trim lines from 355 m elevation, in the southwest, to 155 m, in the northeast.
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Montalvo-Bartolomei, Axel, Bryant Robbins, Erica Medley, and Benjamin Breland. Backward erosion testing : Magnolia Levee. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42140.

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Using a confined flume device, an experimental study investigated the critical horizontal gradient of soils obtained from a site identified as potentially vulnerable to backward erosion piping (BEP). Tests were conducted on glacial outwash material obtained from a sand and gravel quarry in the vicinity of Magnolia Levee in the community of Magnolia, OH. The two bulk samples collected from the quarry had similar grain-size distributions, grain roundness, and depositional environments as the foundation materials beneath the levee. Samples were prepared at various densities and subjected to gradual increases of flow in a wooden flume with an acrylic top until BEP was observed. The critical average horizontal gradient ranged from 0.21 to 0.30 for a bulk sample with a coefficient of uniformity of 1.6, while tests conducted on a bulk sample with a coefficient of uniformity of 2.5 yielded critical average horizontal gradients of 0.31 to 0.36. The critical average gradients measured during these tests compared favorably to values in the literature after applying adjustments according to Schmertmann’s method.
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Kerr, D. E. Reconnaissance surficial geology, Keller Lake, Northwest Territories, NTS 95-P. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328293.

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The Keller Lake map area contains three glacial terrains. First, ridged and fluted till cover the northeast region above 300 m elevation. Second, streamlined till, including mega-scale glacial lineations, and till plain with an extensive organic cover, dominate a low-lying basin in the north-central and central regions. Third, till blanket, ridged till, and undifferentiated till cover the highlands at 375 to 575 m elevation in the southeast, south, and west. A dominant regional northwestward ice flow first crossed the map area. Subsequently, an ice stream developed late during deglaciation, creating northwesterly oriented mega-scale glacial lineations in north-central regions. Late shifts in ice flow in the northeastern highlands also resulted in west-northwestward flutings superimposed on older northwestward-trending drumlinoids. Retreating remnant ice deposited minor moraines and other ridges over fluted till. In the extreme southeast, glacial Lake McConnell inundated lowlands to 275 m elevation, following retreat of southwesterly flowing ice. Meltwater corridors and glaciofluvial sediments are more prevalent in western regions and record variable flow directions.
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Zhu, Minjie, and Michael Scott. Two-Dimensional Debris-Fluid-Structure Interaction with the Particle Finite Element Method. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2024. http://dx.doi.org/10.55461/gsfh8371.

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In addition to tsunami wave loading, tsunami-driven debris can cause significant damage to coastal infrastructure and critical bridge lifelines. Using numerical simulations to predict loads imparted by debris on structures is necessary to supplement the limited number of physical experiments of in-water debris loading. To supplement SPH-FEM (Smoothed Particle Hydrodynamics-Finite Element Method) simulations described in a companion PEER report, fluid-structure-debris simulations using the Particle Finite Element Method (PFEM) show the debris modeling capabilities in OpenSees. A new contact element simulates solid to solid interaction with the PFEM. Two-dimensional simulations are compared to physical experiments conducted in the Oregon State University Large Wave Flume by other researchers and the formulations are extended to three-dimensional analysis. Computational times are reported to compare the PFEM simulations with other numerical methods of modeling fluid-structure interaction (FSI) with debris. The FSI and debris simulation capabilities complement the widely used structural and geotechnical earthquake simulation capabilities of OpenSees and establish the foundation for multi-hazard earthquake and tsunami simulation to include debris.
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Neetha Iyer, Neetha Iyer. How does lung fluke travel from snail to crab to human? Experiment, 2013. http://dx.doi.org/10.18258/1462.

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Swanson, Dr Larry, and Christopher Samuelson. PR-362-06208-R01 Evaluation of Byproduct Emissions from Gas Turbine SCR Catalyst. Pipeline Research Council International, Inc. (PRCI), 2009. http://dx.doi.org/10.55274/r0010978.

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The primary objective of the test program was to evaluate byproduct emissions at steady state and transient operating conditions for two commercially available SCR catalysts used in gas turbine applications. Both NOX removal efficiency and ammonia slip behavior were also examined to validate expected catalyst trends and activity. Even though the study replicated expected field catalyst process conditions as well as possible (e.g., flue gas temperatures, space velocities, and inlet species concentrations), the data and results are from pilot-scale testing only, and consequently may differ from actual gas turbine field tests.
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Lee, Michael H. Migrating Dari Clustergen Flite Text-to-Speech Voice from Desktop to Android. Defense Technical Information Center, 2014. http://dx.doi.org/10.21236/ada608577.

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Tim Merkel, Karl Amo, Richard Baker, et al. MEMBRANE PROCESS TO SEQUESTER CO2 FROM POWER PLANT FLUE GAS. Office of Scientific and Technical Information (OSTI), 2009. http://dx.doi.org/10.2172/1015458.

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Jinawath, Supatra. Development of products from Mae Moh flue-gas gypsum. Chulalongkorn University, 1999. https://doi.org/10.58837/chula.res.1999.34.

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The flue-gas desulfurization gypsum (FGD gypsum) from Mae Moh power station is characterized for its physical and chemical properties, precleaned by acid leaching and sedimentation to light coloured powder which is later used, in later used, in comparison with natural gypsum, as raw material for the syntheses of [beta]-hemihydrate, anhydrites and multiphase plasters. Based on the commercial specification, these gypsum plasters are fabricated into product, i.e. gypsum board and projection plaster slurry. With the employment of gypsum technology, the product performance can be engineered to match up to that of the natural gypsum.
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Gerald, Terry. Linking the SEDLZJ portable standalone library to the CMS coastal hydrodynamic model. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/47646.

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This document describes the repackaging and linkage of the Sandia National Laboratories Environmental Fluid Dynamics Sediment Processes Code (SNL-EFDC-SEDZLJ), (Thanh et al. 2008). It was originally incorporated within a modified version of the US Environmental Protection Agency’s (USEPA) EFDC public-domain surface-water flow, sediment transport, and water-quality model developed by John Hamrick (Hamrick 1992) and its linkage to the ERDC-CHL-CMS hydrodynamic model. SNL-EFDC simulates flow and transport of sediment as bedload and suspended load. SNL-EFDC-SEDZLJ improves EFDC with updated sediment kinetics subroutines. Sediment erosion is calculated using data collected with a Sediment Erosion at Depth flume (SEDflume). SEDflume measures erosion rates as a function of shear stress and depth from relatively undisturbed cores taken directly from the sediment bed below the water body of interest. The use of SEDflume data provides more accurate sediment erosion rates that are directly input to the model.
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