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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Hunger och klasskamp : Västervik 1917 / Hunger and class struggle : Västervik 1917

Sjöstedt, Emil January 2019 (has links)
The protests and strikes in Västervik 1917 have been considered to be the start of the hunger movement in Sweden. The events have been called the Swedish revolution. The Swedes who participated were inspired by the February revolution in Russia, and there were similarities, but the reformist side won and the outcome was the equal vote for most men and women. This essay analyzes the way four newspapers report from the events in relation to the political orientation of the newspapers, the involvement of women in the strikes and protests, and how the events in Västervik can be used for educational purposes. The two right wing newspapers wrote negatively about the worker´s movement and, the two left wing newspapers published articles that acknowledged the struggle of the workers and the abuse against the workers by the factory owners. Three of the newspapers (Smålands Allehanda, Smålands Folkblad and Västerviks Veckoblad) initially have relatively neutral articles and the comments about the opposing political side are relatively subtle. The revolutionary syndicalist newspaper Syndikalisten has a more aggressive tone because it functions as the official paper of SAC, the Swedish workers central organization. The inquiry shows that women were not that much involved in the strikes and protests in Västervik. They were active in the certain sectors, such as foodstuff, where they, in certain cases, could make a big difference. The events in Västervik 1917 can be used in school when the students work with the history of their local communities in a social learning environment.
32

Maslach Burnout Inventory – General Survey (MBI-GS): aplicação em trabalhadores externos de instituições bancárias

Fontes, Leonardo Lopes 28 August 2017 (has links)
Submitted by JOSIANE SANTOS DE OLIVEIRA (josianeso) on 2017-11-16T12:55:21Z No. of bitstreams: 1 Leonardo Lopes Fontes_.pdf: 664121 bytes, checksum: 77126538096938adc686cf80dbf8ebf5 (MD5) / Made available in DSpace on 2017-11-16T12:55:21Z (GMT). No. of bitstreams: 1 Leonardo Lopes Fontes_.pdf: 664121 bytes, checksum: 77126538096938adc686cf80dbf8ebf5 (MD5) Previous issue date: 2017-08-28 / Nenhuma / Este estudo foi realizado com 71 trabalhadores de instituições bancárias da região sul do país, que atuem em atividades externas às agências. Apresenta como principal objetivo avaliar os graus de Síndrome de burnout em bancos da Região Sul do Brasil a partir da aplicação da escala Maslach Burnout Inventory – General Survey (MBI-GS). A pesquisa teve abordagem quantitativa, e natureza de pesquisa pelos tipos pesquisa descritiva e tendo como estratégia a pesquisa de campo. A coleta de dados deu-se através de Survey e de aplicação da escala MBI. Como resultado, identificou-se a presença de níveis moderados de burnout no setor bancário, conforme os critérios estabelecidos por McLaurine (2008), haja vista que seriam indicativos de burnout altos índices de Exaustão Emocional e Despersonalização e moderados índices de Envolvimento Pessoal no Trabalho. No referencial teórico, a Exaustão Emocional seria a primeira dimensão a surgir como indicativo da patologia, apresentando pontuação mais elevada quando comparada as outras dimensões. De acordo com as médias de Exaustão Emocional, obteve-se resultados que variam de 1,37 até 3,24. No caso deste estudo, verificou-se que a Exaustão, apresentou resultado médio de 2,38, indicando que o sentimento de exaustão é frequente nos indivíduos que fizeram parte deste estudo. Quando analisados os níveis de cinismo, os níveis encontrados nesta pesquisa vão de 1 até 1,61, encontrando aqui média em 1,15, caracterizando-se como moderado nível de cinismo. A dimensão Eficácia no Trabalho apresenta suas médias invertidas pelo aspecto positivo dos questionamentos, com resultados entre 4,13 e 5,24, teve média de 4,83, apresentando moderado nível de eficácia no trabalho. Os dados desse estudo apontaram para um desvio padrão considerado elevado, o que demonstra que pode haver uma variação muito grande entre níveis bastante baixos e altos de burnout entre os indivíduos pesquisados. A média de burnout foi de 1,62, caracterizando como moderado o índice de burnout. Em relação ao gênero, observou-se uma correlação significativa com os componentes do burnout, apontando que as mulheres têm uma percepção de exaustão, em média, ligeiramente superior aos homens. Da mesma forma, também se verifica uma tendência para os homens apresentarem níveis médios de Eficácia no Trabalho superiores. Foram propostos três tipos de estratégias de intervenção para a prevenção e tratamento da síndrome de burnout: estratégias individuais; estratégias grupais; e estratégias organizacionais. O estudo apresentou limitações, mesmo ante ao rigor científico e metodológico utilizado. Há limitação na pesquisa em função da escolha da população pesquisada ter sido por acessibilidade ou conveniência, como também os trabalhadores escolhidos nas instituições financeiras formarem uma amostra menor, haja vista que os trabalhadores internos são uma parcela mais representativa no quadro de colaboradores. O número de respondentes reduzido da amostra também representou uma limitação. Para trabalhos futuros, sugere-se a replicação do estudo junto aos trabalhadores bancários internos e com maior número de respondentes, possibilitando uma análise mais detalhada de cada amostra, bem como a replicação em outros tipos de indústria ou regiões do Brasil, possibilitando a comparação entre as mesmas e entre regiões. Recomenda-se também a adoção de outras escalas de mensuração da síndrome de burnout. / This study was carried out with 71 employees from banking institutions in the southern region of the country, who work in activities outside the agencies. The main objective was to evaluate the degrees of Burnout Syndrome in banks in the Southern Region of Brazil from the application of the Maslach Burnout Inventory - General Survey (MBI-GS) scale. The research had quantitative approach, and nature of research by the types descriptive research and having as strategy the field research. The data collection was done through Survey and application of the MBI scale. As a result, the presence of moderate levels of burnout in the banking sector was identified, according to the criteria established by McLaurine (2008), since it would be indicative of high burnout rates of Emotional Exhaustion and Depersonalization and moderate levels of Personal Involvement in Work. In the theoretical reference, Emotional Exhaustion would be the first dimension to appear as indicative of the pathology, presenting a higher score when compared to the other dimensions. According with the Emotional Exhaustion averages, results were obtained that varied from 1.37 to 3.24. In the case of this study, it was verified that the Exhaustion presented an average result of 2.38, indicating that the feeling of exhaustion is frequent in the individuals who were part of this study. When analyzed the levels of cynicism, the levels found in this research range from 1 to 1.61, finding here average in 1.15, characterizing as moderate level of cynicism. The Efficacy dimension in the Work presents its means inverted by the positive aspect of the questions, with results between 4.13 and 5.24, with an average of 4.83, presenting moderate level of work efficiency. The data from this study pointed to a standard deviation considered high, which shows that there may be a very large variation between very low and high levels of burnout among the individuals surveyed. The mean of burnout was 1.62, characterizing as moderate the burnout index. Regarding gender, there was a significant correlation with the components of burnout, indicating that women have a perception of exhaustion, on average, slightly higher than men. In the same way, there is also a tendency for men to have higher average levels of Work Efficacy. Three types of intervention strategies for the prevention and treatment of burnout syndrome were proposed: individual strategies; group strategies; and organizational strategies. The study presented limitations, even before the scientific and methodological rigor used. There is a limitation in the research as a result of the choice of the researched population for accessibility or convenience, as well as the workers chosen in the financial institutions to form a smaller sample, since internal workers are a more representative group of employees. The reduced number of respondents from the sample also represented a limitation. For future work, it is suggested that the study be replicated with internal banking workers and with a larger number of respondents, allowing a more detailed analysis of each sample, as well as replication in other types of industry or regions of Brazil, making it possible to compare the same and between regions. It is also recommended to adopt other measures of burnout syndrome.
33

Infecção por Giardia duodenalis e diversidade da microbiota intestinal em crianças de 0 a 6 anos de idade

Arbex, Ana Paula Oliveira. January 2019 (has links)
Orientador: Semíramis Guimarães Ferraz Viana / Resumo: Giardia duodenalis é um dos principais agentes etiológicos de diarreia infecciosa, sobretudo em crianças em idade pré-escolar que vivem em comunidades de baixa renda. Estudos da diversidade genética de G. duodenalis ampliaram o conhecimento da epidemiologia nas infecções humanas, entretanto um dos temas mais interessantes e menos conhecidos é a possível interação de Giardia com o microbioma do hospedeiro e com patógenos concomitantes. No presente estudo, avaliou-se a composição e a diversidade da comunidade bacteriana de crianças saudáveis e crianças com diarreia, parasitadas por Giardia e outros protozoários intestinais. Os isolados de Giardia obtidos nessa população foram caracterizados geneticamente. Amostras de fezes foram obtidas de 181 crianças de 0 a 6 anos de idade, das quais 156 crianças hígidas atendidas em centros de educação infantil e 25 crianças com diarreia atendidas no PS Infantil Municipal. Cada amostra de fezes foi processada para o exame microscópico e submetida à extração de DNA a ser empregado em duas etapas distintas: (1) amplificação e sequenciamento Sanger para a caracterização genética de Giardia e o diagnóstico de Blastocystis sp, Dientamoeba fragilis, Enterocytozoon bieneusi e Cryptosporidium spp. e (2) amplificação do gene 16s RNA ribossomal e sequenciamento de nova geração (plataforma Illumina MiSeq) para a caracterização da microbiota intestinal. Giardia (36,5%) e Blastocystis (41,7%) foram os parasitas mais prevalentes. A caracterização genética... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Giardia duodenalis is one of the major etiological agents of infectious diarrhea, especially in preschool children living in low-income settings. Studies focused on genetic diversity of G. duodenalis have provided insights for a better understanding of epidemiology in human infections. However, one of the most interesting and least known issues is the possible interplay between Giardia and the host microbiome and concomitant pathogens. In this work, we evaluated the diversity and composition of bacterial community of healthy children and children presenting with diarrhea infected by Giardia and/or other intestinal protozoa. In addition, Giardia isolates infecting this population were genotyping. A total of 181 stool samples from children aged 0 to 6 years old (156 from daycare children and 25 from diarrheic children attending in an emergence pediatric center) were tested by microscopic examination and submitted to DNA extraction for the following steps: (1) conventional PCR/sequencing for Giardia genotyping and the diagnosis of Blastocystis sp, Dientamoeba fragilis, Enterocytozoon bieneusi and Cryptosporidium spp and (2) next-generation sequencing (Illumina MiSeq) based analysis of intestinal microbiota. Giardia (36.5%) and Blastocystis (41.7%) were the most prevalent parasites. Analysis of Giardia sequences retrieved from 61 isolates revealed infections by assemblages A (31%), B (69%) and mixed infections A+B (3%). Metagenomic analyzes revealed similarity of bacterial microb... (Complete abstract click electronic access below) / Doutor
34

臺灣3G手機服務使用者的期待-價值滿足之研究 / A Study on the Expectancy–Value Gratification of 3G Mobile Phone Service Users in Taiwan

吉佳媛, KHIL KHA WON Unknown Date (has links)
隨著廣播、電信、網路的匯流與數位科技發展,消費者在手機上隨時隨地接受「到處存在」(ubiquitous)的電視服務時代已來臨。2003年,第三代行動通訊系統(The Third Generation,3G)服務在台灣正式推行,2009年2月底3G用戶數首度超越2G,使得3G用戶數佔全行動電話用戶數的一半以上。台灣的3G市場及3G用戶數正繼續成長,不過,卻出現許多3G用戶未(曾)使用3G服務的現象,值得關注。 因此,本研究以使用者角度出發,以Palmgreen與Rayburn的GS-GO模式為主軸,探討目前3G服務使用者跟曾使用3G服務者、3G服務非使用者的追求滿足(GS)。另外,也探討目前3G服務使用者,與曾使用3G服務者的獲得滿足(GO),以及此兩者的GS與GO差異及相關性;並討論此差異是否動搖使用者原始信念,並對後續行為產生影響。還有,目前3G服務使用者與曾使用3G服務者,其滿意度差異為何。進一步,本論文還以Rogers的「創新傳佈理論」,加以比較目前3G服務使用者、曾使用3G服務者,與3G服務非使用者之間的創行特質為何。 本研究選定《i.Q線上問卷調查網》會員作為研究樣本,進行電子郵件的網路問卷調查。研究結論如下: 一、探討目前3G服務使用者、曾使用3G服務者及3G服務非使用者的GS因素部分,本研究結果獲得:以下的GS因素中,三者皆相同,且依序為便利追求、娛樂追求、資訊追求、個人化、社會性、時髦性,以及價格因素。然而,三者在GS因素中,時髦因素無差異,其餘因素則都有差異。而目前3G服務使用者與曾使用3G服務者的GO因素中,三者亦相同,依序為便利追求、娛樂追求、資訊追求、個人化、社會性、時髦性,以及價格因素。然而,兩者間的GO因素中,資訊追求顯示有差異,其他GO因素則沒有差異。 二、探討目前3G服務使用者與曾使用3G服務者的追求滿足(GS)、獲得滿足(GO)差異,與相關性部分,據本研究推論:滿意程度會影響後續使用3G手機服務與否,然而,不滿意程度不會影響後續使用3G使用服務與否。 三、探討創新特質部分:目前3G服務使用者與曾使用3G服務者的兩者間,其創新性並不影響使用3G服務與否。然而,目前3G服務使用者與3G服務非使用者兩者間的創新性差異,則會影響3G服務的使用。此外,創新性差異與各項GS因素的分析結果皆呈現顯著性,其中,又與GS因素中的時髦性因素產生最高度相關。
35

Análisis de infra y sobretraducción entre sueco y español : Un análisis lingüístico contrastivo basado en las novelas <em>La casa de los espíritus</em> de Isabel Allende y <em>Simon och ekarna</em> de Marianne Fredriksson y sus traducciones respectivas al español y al sueco / An analysis of under and overtranslation between Swedish and Spanish. : A linguistic and contrastive analysis based on the novels <em>La casa de los espíritus</em> by  Isabel Allende and <em>Simon och ekarna</em> de Marianne Fredriksson and their respectiv  translations to Swedish and Spanish

Elf, Tora Isabella January 2009 (has links)
<p>Resumen</p><p>El tema del presente estudio se ubica dentro de la traductología y trata en particular los fenómenos de sobretraducción (ST) y infratraducción (IT), términos que significan una adición de información (ST) y una reducción de la información original en forma de una generalización del texto fuente (IT). Estos dos fenómenos pueden surgir por falta de isomorfismo entre los idiomas implicados en el proceso de traducción, cuando la idiosincrasia divergente de dos idiomas obliga al traductor a usar diferentes estrategias para poder expresar con la mayor equivalencia posible el mensaje del TF, en el texto meta (TM). El español, al igual que los idiomas románicas en general, se caracteriza por estructuras léxicas, dicho en terminos muy generales, menos complejas que los idiomas germánicos como el sueco y esta diferencia es uno de los aspectos que complica el trabajo del traductor. Siempre, al traducir un texto a cualquier idioma, ocurre un cambio y una pérdida inevitable del significado original, en uno o varios de los niveles sintáctico, semántico y pragmático de estructura, porque no existe isomorfismo absoluto entre dos idiomas. Por lo tanto una generalización es lo esperado de cada traducción. El objetivo de este estudio bidireccional es averiguar si dichas estructuras diferentes de los dos sistemas lingüísticos afectan la tendencia a ST o IT en las respectivas traducciones y hemos llevado a cabo el análisis mediante un corpus que consiste en las 30 primeras páginas de las dos obras <em>La casa de los espíritus</em> de Isabel Allende (1982) y <em>Simon och ekarna</em> de Marianne Fredriksson (1985), y sus respectivas traducciones. El resultado muestra, de acuerdo con la hipótesis, una tendencia a una mayor cantidad de ST en la traducción del español al sueco, y, de IT en la traducción del sueco al español.</p>
36

Next Generation End to End Avionics Bus Monitoring

Rodittis, Kathy, Cooke, Alan 10 1900 (has links)
ITC/USA 2013 Conference Proceedings / The Forty-Ninth Annual International Telemetering Conference and Technical Exhibition / October 21-24, 2013 / Bally's Hotel & Convention Center, Las Vegas, NV / With the advent of networked based data acquisition systems comes the opportunity to acquire, transmit and store potentially very large volumes of data. Despite this, and the increased size of the data acquisition networks, the use of tightly integrated hardware, and setup and analysis software enable the FTI engineer to save time and increase productivity. This paper outlines how the use of innovative bus packetizer technology and the close integration of FTI software can simplify this process. The paper describes how packetizer technology is used to acquire data from avionics buses, and how it packages this data in a format that is optimized for network based systems. The paper further describes how software can simplify the process of configuring avionics bus monitors in addition to automating and optimizing the transport of data from various nodes in the acquisition network for transmission to either network recorders or via a telemetry link.
37

The validation of two burnout measures in the South African earthmoving equipment industry / A.M. le Roux

Le Roux, Anleri Martha January 2004 (has links)
The objectives of this study were to validate the Maslach Burnout Inventory - General Survey (MBI-GS) and the Oldenburg Burnout Inventory (OLBI), to determine the construct equivalence and item bias of these instruments for employees in an earthmoving equipment industry in South &ca of different language groups, to determine the correlation between the MBI-GS and the OLBI, and to investigate the relationship between burnout and various demographic characteristics. A random sample of 326 employees in an earthmoving equipment industry of eight provinces in South Africa was taken. The MBI-GS, the OLBI and a biographical questionnaire were used as measuring instruments. Cronbach alpha coefficients, inter-item correlation coefficients, Pearson product-moment correlation coefficients and exploratory factor analysis were used to analyse the data The results showed that three factors of the MBI-GS and two factors of the OLBI exist for different language groups. Exploratory factor analysis with target rotations confirmed the construct equivalence of the three factors of the MBI-GS and the two factors for the OLBI for different language groups. No evidence was found for uniform or non-uniform bias of the items of the MBI-GS or the OLBI for different language groups. Results indicated that no differences with respect to levels of burnout exist between various demographic characteristics. Recommendations were made for further research. / Thesis (M.Com. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2005.
38

The validation of two burnout measures in the South African earthmoving equipment industry / A.M. le Roux

Le Roux, Anleri Martha January 2004 (has links)
The objectives of this study were to validate the Maslach Burnout Inventory - General Survey (MBI-GS) and the Oldenburg Burnout Inventory (OLBI), to determine the construct equivalence and item bias of these instruments for employees in an earthmoving equipment industry in South &ca of different language groups, to determine the correlation between the MBI-GS and the OLBI, and to investigate the relationship between burnout and various demographic characteristics. A random sample of 326 employees in an earthmoving equipment industry of eight provinces in South Africa was taken. The MBI-GS, the OLBI and a biographical questionnaire were used as measuring instruments. Cronbach alpha coefficients, inter-item correlation coefficients, Pearson product-moment correlation coefficients and exploratory factor analysis were used to analyse the data The results showed that three factors of the MBI-GS and two factors of the OLBI exist for different language groups. Exploratory factor analysis with target rotations confirmed the construct equivalence of the three factors of the MBI-GS and the two factors for the OLBI for different language groups. No evidence was found for uniform or non-uniform bias of the items of the MBI-GS or the OLBI for different language groups. Results indicated that no differences with respect to levels of burnout exist between various demographic characteristics. Recommendations were made for further research. / Thesis (M.Com. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2005.
39

Testes cosmol?gicos aplicados a modelos de energia escura / Applied tests cosmological dark energy models

Moura, ?caro Kennedy Francelino 02 March 2016 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-25T21:57:03Z No. of bitstreams: 1 IcaroKennedyFrancelinoMoura_DISSERT.pdf: 6308092 bytes, checksum: 65c9e0d99b3ea645902b37237e873ed1 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-08-03T20:32:51Z (GMT) No. of bitstreams: 1 IcaroKennedyFrancelinoMoura_DISSERT.pdf: 6308092 bytes, checksum: 65c9e0d99b3ea645902b37237e873ed1 (MD5) / Made available in DSpace on 2016-08-03T20:32:51Z (GMT). No. of bitstreams: 1 IcaroKennedyFrancelinoMoura_DISSERT.pdf: 6308092 bytes, checksum: 65c9e0d99b3ea645902b37237e873ed1 (MD5) Previous issue date: 2016-03-02 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Grandes esfor?os observacionais t?m sido direcionados para investigar a natureza da chamada energia escura. Nesta disserta??o derivamos v?nculos sobre modelos de energia escura utilizando tr?s diferentes observ?veis: medidas da taxa de expans?o H(z) (compiladas por Meng et al. em 2015); m?dulo de dist?ncia de 580 Supernovas do Tipo Ia (cat?logo Union Compilation 2.1, 2011); e as observa??es do pico de oscila??o de b?rions (BAO) e a radia??o c?smica de fundo (CMB) utilizando a chamada raz?o CMB/BAO, que relaciona 6 picos de BAO (um pico determinado atrav?s dos dados do Survey 6dFGS, dois atrav?s do SDSS e tr?s atrav?s do WiggleZ). A an?lise estat?stica utilizada foi o m?todo do ?2 m?nimo (marginalizado ou minimizado sobre h sempre que poss?vel) para vincular os par?metro cosmol?gicos: ?m, ??, ? e ??0. Esses testes foram aplicados em duas parametriza??es do par?metro ? da equa??o de estado da energia escura, p=?? (aqui, p ? a press?o e ? ? a densidade de energia da componente). Numa, ? ? considerado constante e menor que -1/3, conhecido como modelo XCDM; na outra parametriza??o, o par?metro da equa??o de estado varia com o redshift, no qual o chamamos de Modelo GS. Esta ?ltima parametriza??o ? baseada em argumentos que surgem da teoria da infla??o cosmol?gica. Para efeitos de compara??o tamb?m foi feita a an?lise do modelo ?CDM. A compara??o dos modelos cosmol?gicos com as diferentes observa??es leva a diferentes melhores ajustes. Assim, para classificar a viabilidade observacional dos diferentes modelos te?ricos, utilizamos dois crit?rios de informa??o, ou seja, o crit?rio de informa??o bayesiana (BIC) e o crit?rio de informa??o Akaike (AIC). A ferramenta matriz de Fisher foi incorporada aos nossos testes para nos fornecer a incerteza dos par?metros de cada modelo te?rico. Verificamos que a complementariedade dos testes ? necess?ria para n?o termos espa?os param?tricos degenerados. Fazendo o processo de minimiza??o encontramos, dentro da regi?o de 1? (68%), que para o Modelo XCDM os melhores ajustes dos par?metros s?o ?m=0,28?0,012 e ?X=-1,01?0,052. Enquanto que para o Modelo GS os melhores ajustes s?o ?m=0,28?0,011 e ??0=0,00?0,059. E realizando uma marginaliza??o encontramos, dentro da regi?o de 1? (68%), que para o Modelo XCDM os melhores ajustes dos par?metros s?o ?m=0,28?0,012 e ?X=-1,01?0,052. Enquanto que para o Modelo GS os melhores ajustes s?o ?m=0,28?0,011 e ??0=0,00?0,059. / A significant observational effort has been directed to investigate the nature of the so-called dark energy. In this dissertation we derive constraints on dark energy models using three different observable: measurements of the Hubble rate H(z) (compiled by Meng et al. in 2015.); distance modulus of 580 Supernovae Type Ia (Union catalog Compilation 2.1, 2011); and the observations of baryon acoustic oscilations (BAO) and the cosmic microwave background (CMB) by using the so-called CMB/BAO of six peaks of BAO (a peak determined through the Survey 6dFGS data, two through the SDSS and three through WiggleZ). The statistical analysis used was the method of the ?2 minimum (marginalized or minimized over h whenever possible) to link the cosmological parameter: m, ? and ??0. These tests were applied in two parameterization of the parameter ? of the equation of state of dark energy, p = ?? (here, p is the pressure and ? is the component of energy density). In one, ? is considered constant and less than -1/3, known as XCDM model; in the other the parameter of state equantion varies with the redshift, where we the call model GS. This last model is based on arguments that arise from the theory of cosmological inflation. For comparison it was also made the analysis of model CDM. Comparison of cosmological models with different observations lead to different optimal settings. Thus, to classify the observational viability of different theoretical models we use two criteria information, the Bayesian information criterion (BIC) and the Akaike information criteria (AIC). The Fisher matrix tool was incorporated into our testing to provide us with the uncertainty of the parameters of each theoretical model. We found that the complementarity of tests is necessary inorder we do not have degenerate parametric spaces. Making the minimization process we found (68%), for the Model XCDM the best fit parameters are m = 0.28 ? 0, 012 and ?X = ?1.01 ? 0, 052. While for Model GS the best settings are m = 0.28 ? 0, 011 and ??0 = 0.00 ? 0, 059. Performing a marginalization we found (68%), for the Model XCDM the best fit parameters are m = 0.28 ? 0, 012 and ?X = ?1.01 ? 0, 052. While for Model GS the best settings are M = 0.28 ? 0, 011 and ??0 = 0.00 ? 0, 059.
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Zisk a komplexní charakterizace extraktů aronie / Obtaining and complex charaterization of Aronia spp. extracts

Seidlová, Kateřina January 2020 (has links)
Aronia (Aronia melanocarpa) is a berry fruit with distinctive sensory characteristics and health-promoting properties. Polyphenols are the main bioactive compounds found in aronia including natural pigments – anthocyanins. Bioactive compounds are usually obtained from natural materials by extraction, in this work, two methods of extraction were compared – maceration and PHWE. Based on the total phenolic content, maceration was chosen as a more suitable method and then was optimized with statistical model – Design of Experiment. Optimal conditions were set to temperature of 30 °C, extraction agent 50 % ethanol, solid-solvent ratio 10 g per 50 ml and time of extraction for 30 minutes. Extract obtained under these conditions was characterised by total phenolic content – 1441 ± 90 mg/100 g DW, total anthocyanin content 943 ± 8 mg/100 g DW and antioxidation activity by ABTS 24,78 ± 0,09 molTE/g. In total of 25 volatile compounds were indentified in the optimal extract with content > 0,5 %. Major part created aldehydes and esters, with the main compounds being benzaldehyde (32,25 %) and methyl hexanoate (21,37 %).

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