Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-01-05T16:51:31Z No. of bitstreams: 1 AndreLuizLopesToledo_DISSERT.pdf: 3174228 bytes, checksum: f818f27305b477f7bd49409718209f31 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-01-07T21:53:38Z (GMT) No. of bitstreams: 1 AndreLuizLopesToledo_DISSERT.pdf: 3174228 bytes, checksum: f818f27305b477f7bd49409718209f31 (MD5) / Made available in DSpace on 2016-01-07T21:53:38Z (GMT). No. of bitstreams: 1 AndreLuizLopesToledo_DISSERT.pdf: 3174228 bytes, checksum: f818f27305b477f7bd49409718209f31 (MD5) Previous issue date: 2014-11-17 / A perfura??o de po?os para extra??o de petr?leo gera, entre outros res?duos, fragmentos de rochas e solos. Estes fragmentos s?o denominados cascalho de perfura??o de petr?leo ou simplesmente res?duo de perfura??o de petr?leo. Nos locais de explora??o onshore s?o formados grandes dep?sitos de cascalho de perfura??o, material de onerosa destina??o final. Sendo assim, este trabalho apresenta uma pesquisa com o objetivo de avaliar o emprego de res?duo de perfura??o misturado a um solo later?tico, como material comp?sito a ser utilizado na execu??o de aterros compactados em obras de terra. Solo e res?duo foram avaliados atrav?s de difra??o de raios X (DRX), fluoresc?ncia de raios X (FRX) e mediante ensaios de laborat?rio tradicionalmente empregados na mec?nica dos solos, como, an?lise granulom?trica, determina??o de limite de liquidez e de plasticidade e ensaios de compacta??o. Ap?s a caracteriza??o de solo e res?duo individualmente foram estudadas misturas de solo e res?duo, segundo as dosagens de 2,5%, 5%, 10%, e 15% de res?duo em rela??o ? massa de solo seco. Essas misturas foram submetidas aos ensaios de compacta??o, CBR, cisalhamento direto e adensamento. Os resultados dos ensaios foram comparados com as normas vigentes do DNIT para execu??o de aterros compactados. Os resultados encontrados nos ensaios das misturas atendem aos par?metros m?nimos necess?rios, permitindo, sob o ponto de vista da an?lise geot?cnica, a utiliza??o dessas misturas para execu??o de aterros compactados / The drilling of wells for petroleum extraction generates rocks and soils fragments, among other residues. These fragments are denominated petroleum drilling gravel or simply petroleum drilling residue. On the sites of onshore exploration are formed big deposits of drilling gravel, an expensive final destination material. This work aims at evaluating the addition of drilling residue to a lateritic soil, as composite material, for construction of compacted fills for earth work projects. Soil and residue were evaluated by X-ray diffraction (XRD) and X-ray fluorescence (XRF) and by laboratory tests traditionally used in soil mechanics, as particle-size analysis of soils, determination of liquid and plasticity indexes and compaction test. After soil and residue characterization, soil-residue mixtures were studied, using dosages of 2,5%, 5%, 10%, and 15% of residue in relation to the dry soil mass. These mixtures were submitted to compaction test, CBR, direct shear test and consolidation test. The test results were compared to the current legislation of DNIT for compacted fill construction. The results showed that the mixtures presented the minimal necessary parameters, allowing, from the point of view of geotechnical analysis, the use of these mixtures for construction of compacted fills

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-22T23:50:58Z No. of bitstreams: 1 PauloRychardsonFreireBeserraNascimento_DISSERT.pdf: 5936488 bytes, checksum: 7d2c8e903ba6c76641e0854940adcea8 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-02-26T21:32:16Z (GMT) No. of bitstreams: 1 PauloRychardsonFreireBeserraNascimento_DISSERT.pdf: 5936488 bytes, checksum: 7d2c8e903ba6c76641e0854940adcea8 (MD5) / Made available in DSpace on 2016-02-26T21:32:16Z (GMT). No. of bitstreams: 1 PauloRychardsonFreireBeserraNascimento_DISSERT.pdf: 5936488 bytes, checksum: 7d2c8e903ba6c76641e0854940adcea8 (MD5) Previous issue date: 2015-02-27 / Os esfor?os estatais visando alcan?ar uma melhor infraestrutura para o pa?s t?m encontrado algumas barreiras, em especial o atendimento de intranspon?veis requisitos de preserva??o ambiental. H? a necessidade de desenvolvimento de novas t?cnicas que abandonem o exagero na explora??o dos recursos ambientais sem pesar contra o ponto de vista t?cnico-econ?mico. O presente estudo trata da avalia??o da capacidade de carga de um comp?sito formado pela mistura de solo later?tico (classificado para estudo como uma areia argilosa) e desbastes de pneum?ticos inserv?veis. Neste sentido, foi desenvolvido um modelo de aterro rodovi?rio para se avaliar a capacidade de carga do comp?sito. Foi avaliado o comportamento do comp?sito para propor??es de mistura de 0, 10, 20 e 40 % em peso. Provas de carga em placa foram realizadas em modelos compactados com cada propor??o de mistura. Os modelos foram confeccionados em uma caixa de a?o de 1,40 x 1,40 x 0,80 m. Ap?s a compacta??o de quatro camadas do comp?sito, um ensaio de placa foi realizado, sendo obtida a curva tens?o-recalque para o comp?sito. Dificuldades executivas foram observadas na compacta??o dos aterros com teor de incorpora??o de borracha de 20% e 40 %. Verificou-se uma redu??o significativa da capacidade de carga do sistema solo-placa com o aumento do teor de borracha. O comp?sito que apresentou menor perda da capacidade portante em rela??o ao solo de refer?ncia foi ii aquele com um teor de mistura igual a 10%. Al?m dos ensaios de capacidade de carga, um outro aspecto foi avaliado: a capacidade de suporte dos comp?sitos comparados com o solo de refer?ncia em termos do valor do ISC. Os resultados tamb?m mostram uma gradativa queda da capacidade portante nos comp?sitos ? medida com que o teor de incorpora??o de borracha aumenta. Assim como na prova de carga em placa, o comp?sito que perdeu menos capacidade de suporte desempenho foi, tamb?m, aquele com um teor de 10%. / Government efforts have found some obstacles in achieving a better infrastructure regarding environmental preservation requirements. There is a need to develop new techniques that leave the big exploitation of environmental resources. This study measures the evaluation of the behavior of a composite formed by lateritic soil mix and tire buffings. In this way, a road embankment model was developed to assess the bearing capacity of the composite. This study measured the load capacity of the composites with 0%, 10%, 20% and 40% rubber mixed with the soil, by weight, iron plate loading tests on a simulated embankment in a metal box of 1.40 x 1.40 x 0.80 m. After four compaction layers of the composite, a plate test was performed, and then stress-settlement curves were obtained for the material. The embankments with 20% and 40% rubber content was difficult to compact. There was a significant reduction in the load capacity of the soil-plate system with increasing rubber content. The composite with the lowest loss of bearing capacity in relation to the reference soil was the one with a ? = 10%. In the load capacity tests, another aspect noted was the bearing capacity in terms of CBR. The results also show a gradual decrease in bearing capacity in the composites as with the rubber incorporation content increases. As in the plate load tests, the composite that had the lower bearing capacity loss was also that with 10% content.

A hallmark of human behaviour is that we can either couple or decouple our thoughts, decision and motor plans from actions. Previous studies have reported evidence of gating of information between intention and action that can happen at different levels in the central nervous system (CNS) involving the motor cortex, subcortical structures such as the basal ganglia and even in the spinal cord. In my research I examine the extent of this gating and its modulation by task context. I will present results obtained by data collected from (a) neck muscles and neural recording from frontal eye field (FEF) in macaque monkeys and (b) putative motor units (MUs) from high density electrode arrays using surface EMG signals in human to delineate the type of information that leaks into muscles in the periphery when subjects are involved in preparing eye and hand movements, respectively, and its modulation by task context Overall, my results reveal that we can assess some aspects of central planning in the activity of motor units Further, the recruitment of these motor units depend on task context.

This thesis examines variation within the microlith industries of the Later Stone Age (LSA) of Northwest Africa, around the time of the Last Glacial Maximum (LGM) until the onset of the Holocene, between ∼25 - 11.5 ka. The traditionally held view is that whilst there is variation amongst the lithic assemblages, this can all be accommodated by a single definable industry, known as the Iberomaurusian. This thesis indicates an alternative scenario. Based on the typo-technological analysis of 16,689 lithic artefacts recovered from recent excavations at the site of Grotte des Pigeons (Taforalt, Morocco) and the re-analysis of published data using the multivariate statistical approach of correspondence analysis (CA), this thesis shows that there was much greater variation than previously proposed within the Pleistocene LSA. This thesis indicates that the LSA industries can be sub-divided into four chronologically distinct variants, an Initial LSA time-coincident with the first appearance of microlithic technology from ∼25 ka and lasting up until Heinrich event 2, a succeeding Early LSA at ∼22 ka that continued until Heinrich event 1, a Middle LSA marking a shift in technologies around this event at ∼16 ka, and an Upper LSA occurring with the climatic amelioration of the Bølling-Allørod at ∼14.5 ka. The proposed chronological model provides a new framework for categorising variation within the LSA, which is a necessary pre-requisite for potential future research addressing wider anthropological and archaeological issues, such as reasons for shifts in subsistence and settlement.

Longitudinal data (N = 263) was used to investigate the bidirectional relationship between engagement (engaged lifestyle activities) and cognition (crystallized & fluid intelligence). Extroversion and openness to experience were also tested as moderators of the relationship between engagement and cognition. Results showed that the relationship between engagement at Wave 1 and cognition at Wave 2 did not differ from the relationship between cognition at Wave 1 and engagement at Wave 2. Testing for moderation with regression indicated that neither extroversion nor openness was moderating the relationship between engagement and cognition in either direction. Structural equation models provided further summary evidence that the relationships among engagement at Wave 1, extroversion, openness, and cognition at Wave 2 were not strong. However, a strong limitation to these results was the measurement error associated with a new measure of engagement.

A survey was made of the graduates of an educationally -oriented church-sponsored foster home placement agency . The subjects for the study had been graduated from high schools in Idaho, Arizona, Canada, and throughout Utah. There were 235 students graduated during the period 1954-1967 . The survey of these subjects was made by the use of the mailed questionnaire method. Responses were received from 165 (70 . 21 percent) of the subjects. The investigator was searching for modal patterns of behavior among the graduates. Some significant trends seem to be emerging in their post-high school activities. Implications for future studies of the culturally disadvantaged are evident as a result of the study. The subjects of this study appear to be preparing themselves to become more self-reliant in their own culture and functional in the dominant culture. The accomplishments of the respondents compare favorably with those of their contemporaries of the non-Indian population.

When conducting initial forensic interviews, facilitating later retrieval in an efficient and timely manner is often important. A tool called The Self-Administered Interview (SAI) has been shown to facilitate later retrieval when completed initially. Even if less time-consuming than other interviewing protocols, it still takes considerable time to complete. This study compared the capability to facilitate later retrieval and temporal aspects of SAI and its separate parts to investigate the relative worth of each part. The two separate parts were a written, free recall and the rest of SAI without the free recall. Forty-five participants completed either of the parts after watching a fictious crime. Six days later a memory test was administered. This study used the same research design as two previous studies which allowed for integrated analysis using data from the three studies. SAI facilitated later retrieval by significantly increasing number of correct answers and decreasing number of incorrect answers. SAI without a free recall significantly decreased number of incorrect answers. SAI took approximately twice as long to complete as a written, free recall. SAI without free recall had comparable results as a free recall but took almost the same time to complete as SAI. An overall pattern for all initial actions was that an increase in complexity and comprehensive design, increased performance but also took longer to complete. If performance is priority and time is not a factor, SAI is recommended. If lowering time of completion is priority a free recall is the quickest action.

Although research has been conducted on marriage and volunteerism in later life, little is known about the impact of volunteerism on marital quality, particularly intense volunteer experiences. Missionary couples for the Church of Jesus Christ of Latter-day Saints (LDS) leave their homes for a period ranging from 6-18 months and dedicate the majority of their time to working in church assignments. Qualitative interviews were collected from couples who had served senior couples missions for the LDS Church and returned home in the last year. The mean age of participants was 69, and the mean length of marriage for couples was 37 years. Twelve couples were interviewed conjointly about the experience of their missions, and their perceived marital quality before, after, and during their missions. Qualitative analysis was conducted on these interviews, and several themes emerged from the data, as well as subthemes. The themes were divided into those that occurred prior to serving a mission, those that occurred during the mission, and a separate section for marital themes. Pre-mission themes included factors affecting decision to go on a mission, prior experience. Mission themes included type of mission, adjustments, things enjoyed, and things not enjoyed. Marital themes included arguments, closeness, power, and stress. Each section included an in-depth discussion of what each theme incorporated, as well as quotes from the interviews. Overall, couples felt like their missions had a positive impact on their marriages. Comparisons were done among couples serving different types of missions, as well as couples in first, second, and third marriages. Type of mission and number of marriages had little overall impact on a couple's perception of the effect of their mission on their marriage. Therapists can use these results to inform couples who are contemplating an intense voluntary experience.

No description available.

No description available.