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Utbytets och malningens inverkan på NSSC-massans egenskaper / The impact of yield and refining on the properties of NSSC-pulpLarsson, Markus, Kullander, Johan January 2010 (has links)
<p>Neutralsulfitkokning av björk möjliggör ett högt utbyte av hemicellulosa, vilket bidrar positivt till flutingens egenskaper och minskar vedkostnaden. Neutralsulfitkoket ska avbrytas när delignifieringen nått tillräckligt långt för att veden ska kunna defibreras skonsamt med en rimlig energiinsats, men innan nedbrytningen av hemicellulosa hunnit accelerera. Syftet med detta examensarbete var att undersöka utbytets och malningens inverkan på NSSC-massans egenskaper.</p><p>En laboratoriestudie genomfördes där massan kokades till olika utbyten och maldes vid olika insatser. Resultatet av den studien användes sedan för att ställa om kokaren och raffinörerna på lämpligt sätt vid fabriksförsöken. Massaprover togs ut efter det andra kvarnsteget och skickades för analys. De mest väsentliga egenskaperna för fluting testades genom CCT (Corrugated Crush Test), CMT (Concora Medium Test) och SCT (Short Span Compression test) men övriga konventionella egenskaper testades likväl. En avgörande egenskap för fluting är också dess krypstyvhet som undersöktes på laboratorie genom isokrona kryptester. För att få en djupare förståelse för NSSC-massans egenskaper samt kokningens och malningens inverkan på dessa utfördes även fiberkaraktärisering.</p><p>Resultatet visar att styrkan på NSSC-massan kan påverkas genom att variera både utbytet och effekten i raffinörerna. För att åstadkomma en signifikant styrkeökning krävs ett lågt utbyte tillsammans med en hög effekt i raffinörerna. Kraftiga ändringar av dessa parametrar leder dessvärre till att papperets egenskaper förändras i den grad att körbarheten på maskin kan påverkas. Studien visar även att fluting som uppfyller dagens riktvärden kan framställas kostnadseffektivt genom ett högt utbyte i kokaren och en hög insats i raffinörerna. Samtidigt erhålls då en ljusare massa, vilket kan vara betydande i vissa fall. Krypmätningarna visar samtidigt att malningen i positiv bemärkelse påverkar krypstyvheten medan utbytets inverkan är mer svårtolkat. Ett allt för högt utbyte verkar dock vara negativt ur krypstyvhetssynpunkt.</p> / <p>Neutral sulphite cooking of birch enables a high yield of hemicelluloses. This contributes positively to the properties of the flute, reduces the amount of wood needed and hence the cost. The neutral sulphite cook is to be terminated when the delignification has gone sufficiently far so that the wood can be refined mercifully with a reasonable energy input, but before the delignification has gone so far that the degradation of hemicelluloses has started to accelerate. The objective with this thesis was to examine how yield and refining affects the properties of the NSSC pulp.</p><p>A laboratory study was performed where the pulp was cooked to different yields and then beaten with different energy inputs. The results from this study were then used to determine how to set the boiler and the refiners appropriately in the paper mill trials. Pulp samples were collected after the second refiner and were then sent for analysis. The most important properties for flute were tested through CCT (Corrugated Crush Test), CMT (Concora Medium Test) and SCT (Short Span Compression test). More conventional properties were tested as well. Another important property for flute, the creep resistance, was tested in the laboratory through isochronous creep tests. To get a deeper understanding of the properties of NSSC-pulp, along with the effects of cooking and refining, fiber characterization was also performed.The results indicate that it is possible to affect the strength properties on the NSSC pulp by varying both the yield and the energy input in the refiners. To accomplish a large increase in strength, a relatively low yield is needed, along with increased refining. Large changes of those parameters may unfortunately lead to changes in paper properties in such a way that the runability on the paper machine is affected.</p><p>The results also indicate that it is possible to manufacture flute in a more cost efficient way by lowering the H-factor in the boiler while increasing the degree of refining, still keeping the strength properties above the critical values.A pulp with a higher brightness is also acquired when running the mill this way, which can be important in some aspects. The creep studies indicate that increased refining has a positive effect on the creep resistance. It is harder to make conclusions about the impact of yield, but it seems as though all too high yields affects the creep resistance negatively.</p>
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Utbytets och malningens inverkan på NSSC-massans egenskaper / The impact of yield and refining on the properties of NSSC-pulpLarsson, Markus, Kullander, Johan January 2010 (has links)
Neutralsulfitkokning av björk möjliggör ett högt utbyte av hemicellulosa, vilket bidrar positivt till flutingens egenskaper och minskar vedkostnaden. Neutralsulfitkoket ska avbrytas när delignifieringen nått tillräckligt långt för att veden ska kunna defibreras skonsamt med en rimlig energiinsats, men innan nedbrytningen av hemicellulosa hunnit accelerera. Syftet med detta examensarbete var att undersöka utbytets och malningens inverkan på NSSC-massans egenskaper. En laboratoriestudie genomfördes där massan kokades till olika utbyten och maldes vid olika insatser. Resultatet av den studien användes sedan för att ställa om kokaren och raffinörerna på lämpligt sätt vid fabriksförsöken. Massaprover togs ut efter det andra kvarnsteget och skickades för analys. De mest väsentliga egenskaperna för fluting testades genom CCT (Corrugated Crush Test), CMT (Concora Medium Test) och SCT (Short Span Compression test) men övriga konventionella egenskaper testades likväl. En avgörande egenskap för fluting är också dess krypstyvhet som undersöktes på laboratorie genom isokrona kryptester. För att få en djupare förståelse för NSSC-massans egenskaper samt kokningens och malningens inverkan på dessa utfördes även fiberkaraktärisering. Resultatet visar att styrkan på NSSC-massan kan påverkas genom att variera både utbytet och effekten i raffinörerna. För att åstadkomma en signifikant styrkeökning krävs ett lågt utbyte tillsammans med en hög effekt i raffinörerna. Kraftiga ändringar av dessa parametrar leder dessvärre till att papperets egenskaper förändras i den grad att körbarheten på maskin kan påverkas. Studien visar även att fluting som uppfyller dagens riktvärden kan framställas kostnadseffektivt genom ett högt utbyte i kokaren och en hög insats i raffinörerna. Samtidigt erhålls då en ljusare massa, vilket kan vara betydande i vissa fall. Krypmätningarna visar samtidigt att malningen i positiv bemärkelse påverkar krypstyvheten medan utbytets inverkan är mer svårtolkat. Ett allt för högt utbyte verkar dock vara negativt ur krypstyvhetssynpunkt. / Neutral sulphite cooking of birch enables a high yield of hemicelluloses. This contributes positively to the properties of the flute, reduces the amount of wood needed and hence the cost. The neutral sulphite cook is to be terminated when the delignification has gone sufficiently far so that the wood can be refined mercifully with a reasonable energy input, but before the delignification has gone so far that the degradation of hemicelluloses has started to accelerate. The objective with this thesis was to examine how yield and refining affects the properties of the NSSC pulp. A laboratory study was performed where the pulp was cooked to different yields and then beaten with different energy inputs. The results from this study were then used to determine how to set the boiler and the refiners appropriately in the paper mill trials. Pulp samples were collected after the second refiner and were then sent for analysis. The most important properties for flute were tested through CCT (Corrugated Crush Test), CMT (Concora Medium Test) and SCT (Short Span Compression test). More conventional properties were tested as well. Another important property for flute, the creep resistance, was tested in the laboratory through isochronous creep tests. To get a deeper understanding of the properties of NSSC-pulp, along with the effects of cooking and refining, fiber characterization was also performed.The results indicate that it is possible to affect the strength properties on the NSSC pulp by varying both the yield and the energy input in the refiners. To accomplish a large increase in strength, a relatively low yield is needed, along with increased refining. Large changes of those parameters may unfortunately lead to changes in paper properties in such a way that the runability on the paper machine is affected. The results also indicate that it is possible to manufacture flute in a more cost efficient way by lowering the H-factor in the boiler while increasing the degree of refining, still keeping the strength properties above the critical values.A pulp with a higher brightness is also acquired when running the mill this way, which can be important in some aspects. The creep studies indicate that increased refining has a positive effect on the creep resistance. It is harder to make conclusions about the impact of yield, but it seems as though all too high yields affects the creep resistance negatively.
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A recital of compositionsCrutchley, Ian Joseph 05 1900 (has links)
Each composition in the following document has resulted from my desire to explore problems and possibilities that are to be found in the various ensembles and/or techniques chosen. For each new composition a particular issue or set of issues was established at the outset and dealt with from different angles at all stages of the works' creation. [1] Chansons Precieux: In these three songs I was interested in reducing my material choices to a minimum and also in creating a small fragment for the text which could be exploded into syllabic utterances. These were, over the course of the three songs, utilized in small groups. Only in the final song is the entire text revealed. [2] Across The Gorge Is The Bridge: Synthesized and concrete sounds constitute the palette of this tape piece. In processing the sounds I selected evolutionary characteristics with the intention of exploiting these characteristics in a particular manner - the notes in the piece are of extremely long duration (c. 12') and so the evolution takes place at a very slow pace. In a sense time is slowed down in the work, almost to the point of absolute stasis. [3] Triangle: Here I examined the concept of an imagined triangular pathway in which each intersection of two lines consisted of the same object viewed in a different way. The lines themselves are manipulations of the object. The original inspiration for this piece came from reading about Stonehenge and other such prehistoric laboratories designed as viewing points for the sun and moon and their risings and settings at key times of the year. [4] Anya Manas: A small item, in this case a chord, is never presented literally, but begins its life in this piece by already having been bent, altered, linearized and otherwise mutilated. Eventually the chord has completely lost its own sense of its own reality. "Anya Manas" is a Sanskrit saying that refers to a state of mind in which confusion of identity prevails. [5] Wo Weilest Du?: This work involved the desire to eliminate such traditional concepts as motivic development, regular phrasing and clear form. Sound objects appear, vanish and may or may not return later. There is no formal goal or climax. The piece simply begins and ends where it does. The title is German and means where are you waiting? It comes from Wagner's Tristan und lsolde.
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Graduate recitalsMcKittrick, J. Cameron 11 1900 (has links)
The loss of personal meaning is explored by analogy through manipulation
of the relationship between musical content and its possible
interpretations. Recognized musical signals are used out of context.
Weightless signals are used in absolutely rigid and unified structures.
These approaches were brought to the stage before a
live audience in a
single recital on March 6, 1994.
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Two responses to modernism: minimalism and new complexity in solo flute repertoireBakker, Twila Dawn 27 April 2011 (has links)
Wind repertoire, especially for flute, has received little focused attention in the musicological world especially when compared with other instruments. This gap in scholarship is further exacerbated when the scope of time is narrowed to the last quarter of the twentieth century. Although Minimalism and New Complexity are – at least superficially – highly divergent styles of composition, they both exhibit aspects of a response to modernism. An examination of emblematic examples from the repertoire for solo flute (or recorder), specifically focusing on: Louis Andriessen’s Ende (1981); James Dillon’s Sgothan (1984), Brian Ferneyhough’s Carceri d’Invenzione IIb (1984), Superscripto (1981), and Unity Capsule (1975); Philip Glass’s Arabesque in Memoriam (1988); Henryk Górecki’s Valentine Piece (1996); and Steve Reich’s Vermont Counterpoint (1982), allows for the similarities in both genre’s response to modernism to be highlighted. These works are situated historically and characteristics of both styles are highlighted with particular regard to Late or Post-Modernism. / Graduate
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Black snow by Michael Smetanin : an analysis : and original compositionsO'Connor, Jennifer January 2004 (has links)
Black Snow, an orchestral work composed by Michael Smetanin in 1987, was named after the book Black Snow by Mikhael Bulgakov. Newspaper articles, reviews and the literature researched, all comment on Smetanin’s style and on the influences that shaped that style. The aggressive and confrontational style of much of Smetanin’s music can be attributed partly to his love of rock music and jazz and partly to his mentor in the Netherlands, Louis Andriessen. The same sources quote other composers who also influenced Smetanin’s style. Three works in particular are named, that is, Trans by Stockhausen, Keqrops by Xenakis and De Tijd by Andriessen. It was decided, in the light of previous investigations into Smetanin’s music, to take one of these composers, namely Stockhausen and his work Trans, and discover how much Smetanin was influenced by this composer and this particular work. Trans was chosen because the similarities with Black Snow are less obvious. All aspects of Black Snow were examined - namely the harmony, rhythms, the important textures, serial/mathematical techniques, orchestration, the dramatic program, how the instruments are played - and then compared with Trans for similarities and differences. The results of the analytical investigation show that, while the internal organisation of the two works is very different, there are significant similarities between the two works in most of these areas. Serial/mathematical techniques could only be demonstrated in one area, and this is only conjecture.
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20th century French oboe repertoire from two groups of composers "Le triton" and "Le jeune France".Kim, Yeong Su. Ko, Eunae. January 2006 (has links)
Thesis (D.M.A.)--University of Maryland, College Park, 2006. / Compact discs.
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Koncepce výuky hry na flétnu v zájmových střediscích / The Conception of Teaching Play the Floot in free time centresPRZECZKOVÁ, Lucie January 2009 (has links)
This disseartation deals with the conception of teaching play the floot in free time centers. It is specialised on music in the leisure time field and its farther using in life. The dissertation describes music in particular fields of the educational process. It is mentioned here the mission of primary art schools, the mission of kindergardens and the role of leisure time institutions for children in the teaching play the floot. The first part of the dissertation is concentrated on the meaning and influence of music on children. The chapters chart the conception music, the emotional reaction of child on music and musical climate in family. The second part of the dissertation deals with enumeration of particular musical activities. The last part of the dissertation concentrates on the Yamaha musical school and the examples of musical-moving activities.
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結髮鷹緣-絲路上的羯磐陀國紀實攝影展 / Eagle Successor’s Wedding on Silk Road Documentary Photography洪福燦, Horng, Fwutsann Unknown Date (has links)
新疆塔吉克族的婚禮,目前已是聯合國非物質文化遺產之一。塔吉克族的婚禮方式傳統特殊,有其特定的結婚季節,是塔吉克人引以為傲的慶典。隨著中國大陸「一帶一路」的全球經濟發展策略,塔吉克族的故鄉塔什庫爾干,因為位於一帶一路通往中亞與南亞的重要樞紐上,成為了經濟特區,帶動經濟飛快地發展,卻也造成維護傳統文化上的巨大衝擊。許多塔吉克族的傳統房屋被迫拆除,新建地現代樓房因為室內空間改變,而影響了塔吉克族的婚禮儀式。此外,隨著現代化的影響,許多傳統的禮俗慢慢地流失,塔吉克族特有的樂器鷹笛和羊皮鼓,已漸漸地被電子琴所取代。而騎馬迎娶新娘的儀式,也大多被汽車所取代。因此,此創作計畫透過三個多月的紀錄,將塔吉克婚禮的過程紀實攝影,最終展覽以攝影敘事的方式,結合動態影像與塔吉克鷹舞的互動體驗,以及問卷回饋的形式,反映社會大眾對於不同文化變遷的意見,也希望能特過此創作,對於塔吉克族文化的變遷與流失,做最後的紀錄與保存。 / The Xinjiang Tajik wedding is one of the United Nations Intangible Cultural Heritage. The Tajik wedding is particular, traditional which is only hold in wedding season. The Tajik is proud of their wedding ceremony. Via the One Belt One Road global economic strategy in mainland China, which leads to the dramatically change in Tashkurgan, the hometown of the Tajik. The location of Tashkurgan is in the hub of Central Asia and South Asia. The perfect location make Tashkurgan become the Fourth Special Economic Zone in China.
Being the Special Economic Zone brought to the increasing developing, on the other hand, which harmed to the cultural maintenance as well. Most of the traditional Tajik houses were demolished. The China government built the modern house to replace the original tradition one. The change of the house which also changed the indoor space leading to the change to the Tajik wedding ceremony. Otherwise, the modern life also make many customs vanished. Instead of playing the Eagle-flute and Lamb-drum, some wedding were playing the keyboard . The custom about horse-riding to escort the bride was substituted by the car.
Thus, this project has recorded the Tajik for three months. The process of the Tajik wedding was recorded with photography documentary. The exhibition that integrated Photography Narrative and dynamic phantom. In the exhibition, with the questionnaire and interaction in Eagle dance, which reflected the audience feedback to the other culture change. Furthermore, I hope that I could make a contribution to preserve images about the culture change for Tajik via this project.
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A flauta solista na música contemporânea brasileira: três propostas de análise técnico-interpretativas / A flauta solista na música contemporânea brasileira: três propostas de análise técnico-interpretativasCassia Carrascoza Bomfim 04 September 2009 (has links)
Esta dissertação discorre sobre os problemas relativos à performance de três obras brasileiras do repertório contemporâneo para flauta solo: Les silences d´un étrange jardin de Silvio Ferraz, Variações de Marisa Rezende e Sete palavras e um punhal de Aylton Escobar. As obras foram analisadas sob a ótica da análise técnico-interpretativa, com destaque às questões relativas às técnicas expandidas para flauta. Investiguei os problemas técnicos de execução em minúcias e procurei descrever as soluções que agregassem o gestual sonoro ao físico. Concluo ressaltando a importância do relacionamento compositor-performer para a criação e execução deste repertório. De maneira geral, todas as três obras dão uma grande liberdade ao intérprete: Les silences destaca-se pela variedade de técnicas expandidas; a obra de Marisa Rezende apesar da simplicidade aparente pode ser interpretada virtuosisticamente enquanto Sete palavras e um punhal o principal desafio é a preparação dos tapes o uso da fala exigidas pela partitura, a qual os músicos não estão habituados. / This thesis deals with the performance problems of three contemporary works from the Brazilian repertoire for solo flute: Les silences d´un Étrange Jardin by Silvio Ferraz, Variações by Marisa Rezende and Sete Palavras e um Punhal by Aylton Escobar. The pieces were analyzed from a technical-interpretive point of view, with emphasis on extended technique for the flute. I investigated the technical performance practice problems thoroughly while seeking to encounter solutions which combine sonorous and physical gestures. In general, all the pieces give a great deal of freedom to the performer. Les silences displays a great variety of extended techniques while Rezendes work, in spite of its apparent simplicity, could be played with virtuosity. The two main challenges of Sete palavras e um punhal are the preparation of the tapes and with the use the spoken language during performance, a situation to which musicians are normally not accustomed. I conclude by emphasizing the importance of the performer-composer relationship in the creation and performance of this repertoire.
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