Thesis (Ph. D.)--University of Wisconsin--Madison, 1980. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 290-293).

Thesis (Ph.D.)--York University, 2008. Graduate Programme in Mathematics and Statistics. / Typescript. Includes bibliographical references (leaves 81-83). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:NR39029

No description available.

Thesis (Ph. D.)--State University of New York at Binghamton, Mathematical Sciences Department or Field of Study, 2007. / Includes bibliographical references.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1982. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 156-159).

The analysis of categorical data often leads to the analysis of a contingency table. For large samples, asymptotic approximations are sufficient when calculating p-values, but for small samples the tests can be unreliable. In these situations an exact test should be considered. This bases the test on the exact distribution of the test statistic. Sampling techniques can be used to estimate the distribution. Alternatively, the distribution can be found by complete enumeration. A new algorithm is developed that enables a model to be defined by a model matrix, and all tables that satisfy the model are found. This provides a more efficient enumeration mechanism for complex models and extends the range of models that can be tested. The technique can lead to large calculations and a distributed version of the algorithm is developed that enables a number of machines to work efficiently on the same problem.

<p> Methotrexate had been suspected to be harmful to the liver in psoriatic patients. The data of a prospective study to find out whether the drug affected the acquisition and worsening of various liver pathology was analysed. Personal particulars which would have adverse effect on the liver were also investigated. Log-linear models were fitted to this set of categorical data in the form of multidimensional contingency tables. It was found that methotrexate would be hepatotoxic if the drug was taken over a prolonged period and/or if the cumulative dose taken was large. Otherwise, methotrexate could be administered to psoriatic patients without causing much harm to the liver.</p> / Thesis / Master of Science (MSc)

In this report mark-recapture data are analyzed with the use of weighted log-linear models, mosaics, and computer drawings of fish. The data are from salmon hatcheries, subsequent returns to the hatcheries and commercial catches of salmon. The log-linear models were used to study the effects of several variables on catches and returns. It is shown that these variables may have opposite effects depending on the brood year of the fish, that hatchery returns and commercial catches do not respond in the same way to the variables, and that more research is needed to determine the causes of the brood year differences. The mosaics and fish drawings were used to study the migration of the salmon in the ocean. The results confirm that chinook salmon decrease their food intake during the return trip to the hatchery, and they are consistent with theories of ocean migration of other species of salmon. / Thesis / Master of Science (MSc)

No description available.

Universidade Federal do Cearà / VÃrios estudos relacionam a modernizaÃÃo imposta à agricultura nacional â perÃodo de elevado crescimento da agricultura brasileira â à desatenÃÃo do Estado em relaÃÃo aos pequenos produtores. O debate sobre as potencialidades da agricultura familiar brasileira tem sido muito freqÃente na pauta dos atores econÃmicos e sociais do Brasil. Para atender parte da sociedade rural brasileira que reivindicava um modelo diferente para a agricultura nacional e, principalmente, buscando encontrar as alternativas que pudessem minimizar a pobreza rural, foi criado em 1996, a partir de estudos acerca da agricultura familiar no Brasil, o Programa Nacional de Fortalecimento da Agricultura Familiar â PRONAF. O presente trabalho tem por objetivo avaliar o impacto do PRONAF na produÃÃo agrÃcola dos municÃpios do estado do CearÃ. Tomando como base dados secundÃrios, construiu-se um modelo economÃtrico log-linear, de onde se buscou analisar o impacto do crÃdito do PRONAF no valor adicionado agropecuÃrio das seis mesoregiÃes que compÃem o estado. A partir de estimativas estatisticamente robustas, comprovou se que os recursos despendidos pelo PRONAF impactam positivamente sobre a mÃdia do valor adicionado agropecuÃrio dos municÃpios do CearÃ. Ressalve-se que, quando analisado interativamente com um conjunto de municÃpios com caracterÃsticas semelhantes, as âmesoregiÃesâ, o efeito à reduzido, de acordo com a participaÃÃo da atividade agropecuÃria de cada regiÃo, conforme seria esperado.