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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.
631

Parâmetros reprodutivos de perdizes machos (Rhynchotus rufescens) criadas em cativeiro: comparação entre os índices reprodutivos de animais acasalados e inseminados / Reproductive parameters of captive male partridge (Rhynchotus rufescens): artificial insemination versus natural service

Cavalcante, Ana Karina da Silva 24 April 2006 (has links)
A perdiz (Rhynchotus rufescens) é um tinamídeo com amplos músculos peitorais muito apreciados por mercados especializados. No entanto, a produção em larga escala é inexpressiva, podendo ser melhorada através da inseminação artificial (IA). Sendo assim, o presente experimento teve como objetivos padronizar a coleta de sêmen, o teste hipo-osmótico, testar diferentes diluidores, tempos de refrigeração e doses inseminantes. Amostras seminais de 100 animais, pertencentes a FCAV/UNESP/Jaboticabal, foram empregadas na descrição do volume, pH, motilidade, vigor, concentração e alterações morfológicas. As coletas de sêmen foram realizadas em 2 ciclos. No primeiro ciclo foram realizadas a padronização da técnica de coleta de sêmen e a determinação do melhor meio hipo-osmótico, por meio de oito soluções. No segundo ciclo de coletas aplicou-se as técnicas já padronizadas; descreveu-se a motilidade e vigor espermático de amostras seminais diluídas em meios para sêmen de peru, TCM 199, TQC e solução fisiológica, refrigeradas por até 48h; além de terem sido realizadas IA em 128 fêmeas utilizando sêmen de 32 machos, os animais foram agrupados em quintetos (1 macho:4 fêmeas) no início do ciclo reprodutivo de 2004-2005. Metade dos quintetos foi mantida no sistema de monta natural e empregada como grupo controle (GC). A outra metade foi mantida em quintetos por apenas 2 meses. Em seguida, retirou-se os machos dos boxes das fêmeas, para formar os grupos inseminados (GI), cada um com uma dose inseminante de 10, 20, 30 ou 40x106sptz. No primeiro ciclo padronizou-se o método de coleta, no segundo empregou-se a técnica padronizada e os valores encontrados para a média e erro padrão da média de 231 amostras para volume, aspecto, motilidade, vigor, pH e concentração espermática foram: 23,59±1,30µ l; 1,81±0,03; 73,06±1,41%; 3,06±0,08; 8±0; 5,25±0,74x109sptz/ml; respectivamente. A motilidade correlacionou positivamente com a porcentagem média de células normais (r=0,4; p<0,0001) e negativamente com as porcentagens de defeitos totais e de cabeça solta (r=-0,4; p<0,0001). A porcentagem de caudas enroladas nas soluções hipo-osmóticas testadas variaram de 73,25±3,3 a 84,52±2,21%. A solução hipo-osmótica de 100mOsm demonstrou ser adequada e foi empregada em 81 amostras, resultando em 82,0±1,38% de espermatozóides com membrana íntegra, gerando uma correlação positiva (r=0,4; p<0,0002) entre esta variável e a motilidade. As amostras seminais diluídas em solução fisiológica não apresentaram motilidade e vigor após refrigeração, diferente das demais. As amostras refrigeradas por 24 e 48h em TCM 199 apresentaram melhores resultados de motilidade e vigor do que as que permaneceram no diluidor para sêmen de peru e TQC. Não foi possível observar diferenças estatísticas significantes entre os resultados da comparação dos índices reprodutivos entre GI e GC, porém os valores médios de ovos férteis obtidos no sistema de monta natural (2,22±0,29) foram menores do que os grupos inseminados com 30 (4,44±1,81) e 40x106sptz/dose inseminante (3,65±1,66). Os resultados do presente experimento permitiram concluir que é possível a coleta e avaliação de sêmen de perdizes para o posterior emprego de biotecnologias tais como a inseminação artificial, sendo que esta pode ser utilizada a curtíssimo prazo, com a finalidade de aumentar a produção e melhorar o manejo genético deste animal. / The partridge (Rhynchotus rufescens) belongs to the tinamidae family and possesses breast muscles which are quite appreciated in high cuisine However, there is an insignificant large scale production, which could be improved using the artificial insemination (AI). The present experiment aimed to standardize semen collection and the hipoosmotic swelling test and to test dilutors, refrigeration times and insemination doses in partridges. Semen samples of 100 animals, belonging to the FCAV/UNESP/Jaboticabal, were used to describe the volume, pH, motility, vigor, concentration and morphologic alterations. Semen collections were performed in 2 stages. The first stage consisted of standardizing the technique of semen collection and of verifying the most adequate hipoosmotic medium (8 different osmolarities). In the second stage, the standardized techniques were applied; motility and vigor were evaluated in samples diluted in turkey semen extender, TCM 199, TQC and physiologic saline solution, refrigerated until 48 hours. Still in the second stage, 128 females and 32 males were allocated in groups of 5 (1 male:4 females) in the beginning of 2004-2005 reproductive season. Half of the quintets were bred using natural service (control group - CG); the other half was kept as quintets for 2 months, after which males were removed and allocated in quartets with no physical contact with the females. The females of this group were then inseminated (inseminated group ? IG) with 10, 20, 30 e 40x106sptz/ insemination dose. In the first experimental stage, 231 samples were evaluated for volume, aspect, motility, vigor, pH e sperm concentration with values averaging 23.59±1.30µl, 1.81±0.03, 73.06±1.41%, 3.06±0.08; 8±0; 5.25±0.74x109sptz/ml, respectively. Motility was positively correlated with percentage of normal cells (r=0.4; p<0.0001) and negatively correlated with the percentages of total sperm defects (r=-0.4; p<0.0001) and detached head (r=-0.4; p<0.0001). Percentage of swollen tails in the hipoosmotic solutions ranged from 73.25±3.3 a 84.52±2.21%. The solution of 100mOsm was the most adequate, being used in 81 samples, which averaged 82.0±1.38% of sperm cells with intact membrane. A positive correlation (r=0.4; p<0.0002) was found between the percentage of cells with intact membrane and motility. Neither motility or vigor were observed in samples diluted in physiologic saline solution, different for the other tested solutions. After both 24 and 48 hours of refrigeration, TCM 199 showed the highest results of motility and vigor when compared to the turkey extender and the TQC. No differences on the general reproductive indexes were found between animals from IG or CG. However, mean values of fertile eggs from CG (2.22±0.29) were lower (p<0.05) than groups inseminated with 30 (4.44±1.81) and 40x106sptz/insemination dose (3.65±1.66). Results allowed to infer that the techniques of semen collection and evaluation in partridges standardized in the present experiment may be used in a short term period for reproductive technologies such as artificial insemination, which could increase the production and improve the genetic management of these animals.
632

Making fashionable furniture in England and France during the 'age of elegance'

Riall, Ernest January 2010 (has links)
The primary aim of this thesis has been to describe the complex influences governing the production of fashionable furniture in C18th England and France in order to reassess the connection between material practices, the cultures in which they reside and the philosophical ideas from which they emerge. This has been achieved by detailing the factors influencing the design and production of late C18th furniture in England and France and developing a comparative model developed around the Harewood Library Table by Thomas Chippendale and The Wallace Collection F302 Secrétaire á abattant by Riesener, in order to isolate, identify and interpret differences between them. This innovative case study sits at the heart of this thesis and describes in detail how these pieces were designed and constructed and how they relate to the wider cultures from which they emerged. The result of this is apparent in a number of outcomes. Firstly, the thesis offers a definitive summary of the key characteristics of Chippendale’s and Riesener’s work which will better enable practitioners (conservators, curators, collectors, etc.) to identify pieces made by these makers, analyze their condition and help conserve these important pieces of furniture: furniture history currently is over‐dependent on much more subjective approaches to this process of identification. Secondly, the thesis examines different aspects of furniture making in England and France (literature on the workshops, information on economic conditions, evidence relating to tools and materials etc.) and integrates them in such a way as to provide an authoritative account of the complex processes involved in the commissioning of such fashionable furniture. The thesis not only helps us better understand furniture making in England and France at a structural level during this key period of transition but also provides an original and systematic approach to writing a history around such material cultures, demonstrating how important it is to the full(est) comprehension of history that such fashionable objects be understood. Where other frequently more privileged objects (written documents, paintings and sculptures etc.) have been seen to provide valuable historical insights, this thesis argues that fashionable furniture can now be seen to provide its own unique perspectives on the time and on the society in which it was created.
633

Development of a Chloride Concentration Sampling Protocol for Concrete Bridge Decks

Montgomery, Sharlan Renae 18 March 2014 (has links)
As the primary cause of concrete bridge deck deterioration in the United States is corrosion of the steel reinforcement as a result of the application of chloride-based deicing salts, chloride concentration testing is among the most common techniques for evaluating the condition of a concrete bridge deck. The objectives of this research were to 1) compare concrete drilling and powder collection techniques to develop a sampling protocol for accurately measuring chloride concentrations and 2) determine the number of chloride concentration test locations necessary for adequately characterizing the chloride concentration of a given bridge deck. Laboratory experiments on concrete drilling and powder collection were conducted to compare current concrete powder sampling techniques, including constant and stepwise drilling methods and spoon and vacuum powder collection methods. In addition, three charts were prepared to determine the number of chloride concentration test locations necessary for adequately characterizing the chloride concentration of a given bridge deck. The number of samples is dependent on reliability, spatial variability in chloride concentration, and an allowable difference between sample and population means. For the experiment on drilling, this research shows that the practice of decreasing the size of the drill bit in a stepwise fashion with increasing sampling depth reduces the possibility of abrading concrete from the sides of the hole above the sampling depth, where the chloride concentrations are higher, during drilling of lower lifts. For the experiment on powder collection, this research demonstrates that representative samples of concrete powder can be collected with either a spoon or a vacuum. Based on the results of this research, the stepwise drilling method and either the spoon or vacuum powder collection method are recommended for application. In addition, the charts developed in this research are recommended for estimating the number of chloride concentration test locations necessary for adequately characterizing the chloride concentration of a given bridge deck. This research will be helpful in effectively assessing the condition of concrete bridge decks with respect to chloride-induced corrosion of the reinforcing steel and prioritizing bridge maintenance and rehabilitation projects.
634

The Printz is Great, but Don’t Forget the Alex! Collection Development and Reading Promotion for Upper-Level High School Students

Lyons, Reneé C., Parrott, Deborah 07 November 2015 (has links)
Eleventh and twelfth grade high school students are ready to meet the world; or are they? If your library collects and promotes award-winning ALEX award-winners, they are! Visit this session to discover ALEX titles conducive to the needs and interests of an age group ready to tackle the big, bad world, while also receiving sound motivational, get-the-book-in-the-hand strategies. (S2-E161)
635

The attitudes of the residents and the municipality of Thulamahashe in the Limpopo Province of South Africa towards waste management

Mathebula, N. P. January 2006 (has links)
Thesis (MPA.) --University of Limpopo, 2006 / Refer to the document
636

Review of Great Masters of Mexican Folk Art: From the Collection of Fomento Cultural Baname

Tolley, Rebecca 01 March 2002 (has links)
No description available.
637

Creating abstractly and teaching simply insects : a collection in multiple dimensions

Chamberlain, Kevin Franz 01 July 2012 (has links)
I study art, and that is because I like to think about how it helps people learn. In particular I like to create insects as abstractions of nature to invite a different perspective on how the world works. I strive to create synergy through interdisciplinary projects so that people can learn through science, technology and art simultaneously. The point of intersection between these fields of study is where my work can be found. My artwork includes scientific photography of insect collections, 3-D scanning, rapid prototyping, molds and ceramic sculptures. All of these have specific processes and through them I have created abstractions of nature to invite a different perspective.
638

A HOUSE WITH PEOPLE IN IT: STORIES

Johnson, Isabelle 01 January 2019 (has links)
A House with People in It is a collection of stories working through concepts of identity, family, relationships, and how those things renew and replace themselves in perpetuity. I think of identity less of a rigid, singular thing and more of a swirling, fluid multitude. If the body is a house, then identity is the people who live inside it. How they live next to each other—who butts up against who, who sleeps in what bed—is what’s interesting to me. These works collected in this thesis are largely the stories that I think hew closest to the things that I am concerned with, in the identities that I occupy.
639

IMPROVING DATA QUALITY WITH FOUR SHORT SENTENCES: HOW AN HONOR CODE CAN MAKE THE DIFFERENCE DURING DATA COLLECTION

McKay, Alexander Scott 01 June 2014 (has links)
Careless responders have a large impact on a study by causing issues such as Type II errors (failing to reject a false null hypothesis), which then waste researchers’ time and money. Research on careless responding has focused primarily on detecting and removing careless responders rather than on reducing careless responding before data collection begins. The purpose of the present study was to test the use of honor codes with or without the presentation of a picture of watchful eyes to increase self-awareness thereby reducing careless responding. Participants (N = 305) were randomly assigned to one of five honor code conditions (control condition, read-only condition, type condition, read-and-eyes condition, or type-and-eyes condition) and then completed a number of personality measures. Participant’s responses were screened for careless responding. I found that when participant’s only read an honor code without a picture of watchful eyes on the screen, they were significantly more likely to engage in careless responding than were people in the control condition. There was no significant difference in careless responding in the control condition compared to the other three conditions (type condition, read-and-eyes condition, or type-and-eyes condition). This finding indicates that participants being presented only with an honor code, and no other cues of moral behavior, might lead to psychological reactance (i.e., participants perceiving their freedom or control was threatened). This psychological reactance was likely due to participants feeling coerced to respond honestly by the honor code rather than participants responding honestly on their own accord. Additionally, there were no differences on participant’s responses across conditions on a number of personality measures that may be sensitive to increased self-awareness. A number of exploratory analyses were also conducted to further examine psychological reactance. The present study provides answers and possible directions to a number of useful questions that could improve data quality and reduce potential negative effects of honor codes under certain circumstances.
640

The Edge of the World, and Other Stories

Ukani, Amreen 01 January 2011 (has links)
The six short stories in this collection explore the lives and desires of disparate women. In "Sentinel," a woman visits an ex-boyfriend, injured in the army, and his family, with whom she has a fraught relationship, in their vacation home. A diagnosis of cancer spurs a woman to change her life in "Cell Division"; when a new possibility for treatment arises, she reconsiders the choice she made to take her life apart. In the story, "A Wake," a funeral and an unexpected pregnancy set the stage for the breakdown of a couple's relationship. In "A Cyclic Process," a woman conflates her ambivalence toward the anti-depressants she takes with her feelings about her relationship; in the end, she cannot let go of either. A woman, traveling with a new acquaintance, takes a trip to Venice in "The Edge of the World," and falls into an unsettling relationship with a man she meets there. The process of protein denaturation serves as a metaphor in "Marina," for the unraveling of a friendship between two teenage girls.

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