24,485 research outputs found
Chia-Chen Liu Piano Recital Program Notes
No full textThis thesis is the program notes of Chia-Chen Liu\ue2s piano recital held at the National Sun Yat-sen University on May 27, 2020. The recital program includes the works of four different composers, namely Fr\uc3\ua9d\uc3\ua9ric Chopin\ue2s Nocturne in F Major, Op. 15 No. 1, Nocturne in B Major, Op. 62 No. 1 and Nocturne in E Major, Op. 62 No. 2; Wolfgang Amadeus Mozart\ue2s Fantasia in C Minor, K. 475; Sergei Bortkiewicz\ue2s Elegie, Op. 46 and Fanny Hensel geb. Mendelssohn\ue2s \u27June, July, August, September, October \u27, from "Das Jahr". The program notes will introduce how the four composers created unique works in different time and space
A Study of Liu Chia-mo and His Poetry of Realism
No full textLiu Chia-mo (1814-1853), a native of Houguan in Fujian, once served as an educational instructor at Ningde and a school counselor in Taiwan Prefecture during the Daoguang and Hsienfeng reigns of the Ching Dynasty. Owing to a lack of relevant literature and access to his poetry, academics have not come up with any comprehensive study concerning Liu Chia-mo, his works and his social life. Therefore, this research was intended to construct the life story of Liu Chia-mo from the first-hand historical documents including Liu Chia-mo\ue2s works\ue2 First Draft by Waidingmoa Bridge Recluse, Dungyang Little Grass, Sword Poetry, Wandering Ambition in Crane Pen, Guanhai Chi, Haiyin Shi, Hsieh Chang-ting\ue2s Gambling Chess Villa Collection (Shi, Wen, Tsu, Tsu Words, Notebook), and the recently discovered Gambling Chess Villa Draft, Chang Chi-liang\ue2s Chang Heng-fu Collection, Si-Po-Tzu Hall Poetry, Huang Tsung-yi\ue2s Po-Suo Poetry, and Wei Hsiu-jen\ue2s Hai-Nan-Shan Hall Poetry.
This dissertation takes realism in the poetry by Liu Chia-mo as its subject. It will demonstrate his patriotism, concern over the livelihood of civilians and responsibilities and expectations for the world mainly through the textual study of First Draft by Waidingmoa Bridge Recluse, Dungyang Little Grass, Guanhai Chi and Haiyin Shi.
The Introduction section consists of a literature review of Liu Chia-mo and the characteristics of his poetry of realism. Chapter One briefly describes Liu Chia-mo\ue2s historical background in the spirit of knowing the person from the world. Chapter Two explores the life of Liu Chia-mo, his publication of poetry and literature, and his literary creativity with aside from his poetry. Chapter Three deals chiefly with First Draft by Waidingmoa Bridge Recluse to study his poetry on the Sino-British Opium War. Chapter Four examines Dungyang Little Grass together with Wandering Ambition in Crane Pen to study the poetry composed during his service as an educational instructor at Ningde. Chapter Five focuses on the discussion of Guanhai Chi and Haiyin Shi, two poetic texts composed by Liu Chia-mo during his service as a school counselor in Taiwan Prefecture that address social issues in the Chinese-dominated Taiwan society during the Daoguang and Hsienfeng reigns as an effort to cure social illness and improve public morality from a perspective of observing customs.
An estimated total of 1,100 poems were composed by Liu Chia-mo, whose contents range from the Opium War, Taiwanese social traditions and customs, expressions of praise for matters in painting, landscape description, and family relationships and friendship. Characterized by detailed quotations, occasional dialectal usages and transformation of vulgarity into gracefulness, they are all works that express a love of native land. In its concluding section the paper briefly considers the contents of Liu\ue2s poetry as an effort to deepen the study of Liu Chiao-mo and Taiwanese literature
Emprego da tecnologia supercrítica para a valorização do resíduo de semente de chia (Salvia hispanica)
Full text linkDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia de Alimentos, Florianópolis, 2014.A chia (Salvia hispanica) é uma planta cultivada nas Américas do Sul e Central, cuja semente é fonte de antioxidantes naturais e ácidos graxos essenciais. O presente estudo avaliou a obtenção de extratos de torta de chia, subproduto proveniente da extração do óleo de chia. Foram aplicadas as técnicas a baixa pressão como extração em Soxhlet (SOX), ultrassom (US) e maceração (MAC) utilizando etanol (EtOH), hexano (Hex) e acetato de etila (EtOAc) como solventes, a fim de comparar com o processo de extração supercrítica (ESC). As operações de ESC foram realizadas com pressões de 150 bar a 300 bar e temperaturas de 40 °C e 50 °C empregando o CO2 como solvente. Também foi realizada a aplicação de EtOH e EtOAc como cossolventes no processo de ESC em concentrações de 2,5 até 7,5 %. O processo de extração supercrítica sequencial (ESC-S) foi estudado, o qual possui duas etapas de extração, com uma despressurização rápida do sistema entre a primeira e a segunda etapa. A construção da curva cinética e modelagem matemática de processos de ESC e ESC-S foram executadas, além da estimativa de custos de manufatura da instalação de uma unidade industrial de ESC. Todos os extratos obtidos foram submetidos a análises de atividade antioxidante (método ABTS), teor de fenólicos totais (TFT), perfil de ácidos graxos e atividade antimicrobiana. Nas extrações a baixa pressão, os maiores rendimentos foram obtidos utilizando SOX com EtOH (15,4 ± 0,4 %). Nas ESC com CO2 puro, a pressão de 300 bar permitiu alcançar rendimentos de até 10,6 ± 0,2 %, na maior temperatura estudada. A utilização de cossolvente causou aumento no rendimento de extração (11,3 ± 0,1% utilizando EtOH a 7,5%). Os extratos obtidos em extrações a baixa pressão com EtOH e EtOAc obtiveram os melhores valores de TFT e atividade antioxidante. A utilização de cossolvente afetou positivamente os resultados de TFT e atividade antioxidante dos extratos de ESC. O perfil de ácidos graxos dos extratos confirmou altos teores de ácido linoleico e a-linolênico em todos os extratos testados. Extratos obtidos pelas diferentes técnicas mostraram atividade antimicrobiana contra B. cereus. A ESC-S com despressurização rápida teve efeito positivo com relação ao rendimento, onde foi atingido rendimento de 8,7 ± 0,2%, estatisticamente igual ao rendimento obtido em ESC na mesma condição, porém reduzindo o tempo de extração pela metade. A realização da segunda etapa de ESC-S utilizando EtOH 7,5% ocasionou um aumento no TFT dos extratos obtidos. O modelo que melhor se ajustou as curvas experimentais foi o modelo de Martínez et al. (2003). Segundo o modelo de Sovová (1994), para os processos de ESC e primeira etapa de ESC-S, o mecanismo de convecção foi mais representativo. Na segunda etapa de ESC-S o mecanismo de difusão também mostrou representatividade. A ESC-S quando realizada até a etapa de despressurização (ESC-Desp) mostrou ser um processo economicamente viável e lucrativo para aplicação em escala industrial, com valores de extrato competitivos com os valores de mercado, gerando extratos de alta qualidade em um menor tempo de processo.Abstract : Chia (Salvia hispanica) is a plant cultivated in South and Central America, whose the seed is a source of natural antioxidants and essential fatty acids. The present study evaluated the extracts attainment from chia seed cake, which is a byproduct from chia seed oil extraction process. It were applied low-pressure techniques, like Soxhlet extraction (SOX), ultrasound assisted extraction (US) and maceration (MAC) using ethanol (EtOH), hexane (Hex) and ethyl acetate (EtOAc) and as solvents with the objective of comparing with the high pressure process, performed by supercritical fluid extraction (SFE). SFE were performed at pressures from 150 to 300 bar and temperatures of 40 °C and 50 °C, using CO2 as solvent. It was also performed an application of EtOH and EtOAc as cosolvents on SFE process, using concentrations from 2.5 to 7.5%. A sequential supercritical fluid extraction (S-SFE) process was studied, wich includes two steps of extraction, with a fast depressurization of the system between the first and the second step of extraction. The kinetic extraction curves of SFE and S-SFE processes were built and mathematical models adjusted the experimental data. It were also performed an estimative of manufacturing costs from installing a supercritical fluid extraction industrial unit. All extracts was submitted to antioxidant analysis (ABTS method), total phenolics content (TPC), fatty acids profile and antimicrobial analysis. Among low-pressure extraction, the highest yield was achieved using SOX with EtOH (15.4 ± 0.4 %). Among the SFE assays using pure CO2, the pressure of 300 bar allowed to achieve yields up to 10.6 ± 0.2 %, in the highest tested temperature. The use of a cosolvent caused increase in yield (11.3 ± 0.1% using EtOH 7,5%). Extracts obtained by lowpressure techniques using EtOH and EtOAc showed the best values of TPC and antioxidant activity. The using of a cosolvent affected in a positive way the results of TPC and antioxidant activity of SFE extracts. The fatty acids profile of the extracts confirmed the high content of linoleic and a-linolenic acids in all tested extracts. Extracts obtained by different techniques showed antimicrobial activity against B. cereus. SSFE process with fast depressurization caused a positive effect in yield, achieving a yield of 8.7 ± 0.2%, statiscally equal to the yield obtained by SFE using the same condition, but reducing the extraction time by half. The performance of the S-SFE second step using EtOH 7.5% caused an increase in the TPC of the obtained extracts. Martínez et al (2003) was the model which best-adjusted experimental data. According to Sovová s model (1994), in S-SFE first step and SFE processes, the convection mechanism was more representative. In the S-SFE second step, the diffusion mechanism showed to be representative. S-SFE process, when realized until the depressurization step (SFE-Desp), showed to be an economically viable and profitable process on an industrial scale application, with values of extract competitive with market values, generating high quality extracts in a shorter process time
A cohesive zone model for predicting delamination suppression in z-pin reinforced laminates
No full textThis paper presents a cohesive zone model based finite element analysis of
delamination resistance of z-pin reinforced double cantilever beam (DCB). The
main difference between this and existing cohesive zone models is that each z-
pin bridging force is governed by a traction-separation law derived from a meso-
mechanical model of the pin pullout process, which is independent of the
fracture toughness of unreinforced laminate. Therefore, two different traction-
separation laws are used: one representing the toughness of unreinforced
laminate and the other the enhanced delamination toughness owing to the pin
bridging action. This approach can account for the large scale bridging effect
and avoid using concentrated pin forces, thus removing the mesh dependency and
permitting more accurate analysis solution. Computations were performed using a
simplified unit strip model. Predicted delamination growth and load vs.
displacement relation are in excellent agreement with the prediction by a
complete model, and both models are in good agreement with test measured load
vs. displacement relation. For a pinned DCB specimen, the unit strip model can
reduce the computing time by 85%
- …
