The two aims of the project involved: 1. Devising a system for prediction o f areas of bathymetric change within the Fal estuary 2. Formulating and evaluating a method for interpolating single beam acoustic bathymetry to avoid artefacts o f interpolation. In order to address these aims, sources of bathymetric data for the Fal estuary were identified as Truro Harbour Office, Cornwall County Council and the Environment Agency. The data collected from these sources included red wavelength Lidar, aerial photography and single beam acoustic bathymetry from a number of different years. These data were input into a Geographic Information System (GIS) and assessed for suitability for the purposes o f data comparison and hence assessment of temporal trends in bathymetry within the estuary Problems encountered during mterpolation of the acoustic bathymetry resulted in the later aim of the project, to formulate an interpolation system suitable for interpolation of the single beam, bathymetric data in a realistic way, avoiding serious artefacts of interpolation. This aim was met, successfully, through the following processes: 1. An interpolation system was developed, using polygonal zones, bounded by channels and coastlines, to prevent interpolation across these boundaries. This system, based on Inverse Distance Weighting (IDW) interpolation, was referred to as Zoned Inverse Distance Weighting (ZIDW). 2. ZIDW was found, by visual inspection, to eliminate the interpolation artefacts described above. 3. The processes of identification of sounding lines and charmels, and the allocation of soundings and output grid cells to polygons, were successfully automated to allow ZIDW to be applied to large and multiple data sets. Manual intervention was maintained for processes performed most successfully by the human brain to optimise the results o f ZIDW. 4. To formalise the theory of ZIDW it was applied to a range of idealised, mathematically defined chaimels. For simple straight and regular curved, mathematical channels interpolation by the standard TIN method was found to perform as well as ZIDW. 5. Investigation of sinusoidal channels within a rectangular estuary, however, revealed that the TIN method begins to produce serious interpolation artefacts where sounding lines are not parallel to the centre lines o f channels and ridges. Hence, overall ZIDW was determined mathematically to represent the optimum method o f interpolation for single beam, bathymelric data. 6. Finally, ZIDW was refined, using data from the Humber and Gironde estuaries, to achieve universal applicability for interpolation of single beam, echo soimding data from any estuary. 7. The refinements involved allowance for non-continuous, flood and ebb type charmels; consideration of the effects of the scale of the estuary; smoothing of the channels using cubic splines; interpolation using a 'smart' ellipse and the option to reconstruct sounding lines from data that had previously been re-ordered.

Varieties of masonry units such as burnt clay bricks, stones and concrete products are used for masonry construction. Even though these materials are durable, they are considered as unsustainable options because of the issues concerning energy, environment and conservation of natural resources. The walling materials are consumed in bulk quantities and hence large quantities of natural resources are depleted. There is a need for energy efficient and environment friendly alternative materials for masonry. Fly ash is an industrial by-product from the coal based thermal power plants which can be exploited for manufacturing of masonry units such as fly ash blocks/bricks, which are an alternative for conventional masonry units. Fly ash-Lime-Gypsum (FaL-G) bricks can be manufactured by compaction of a mixture of fly ash-lime-gypsum and water. The behaviour of FaL-G brick masonry is inadequately explored area and hence the thesis is focused on understanding the flexural behaviour of FaL-G brick masonry and bond development phenomenon at FaL-G brick-mortar interface. A brief introduction to the fly ash-based masonry units and literature review with respect to utilizing fly ash in manufacturing masonry units are presented. Characteristics of raw materials used and the procedure followed in casting of masonry units/compacts, mortar and their assemblages including testing methods have been discussed. Characteristics of FaL-G brick, mortars, FaL-G brick masonry are presented. Apart from determining the stress-strain relationships for these materials shear strength parameters of FaL-G compact, mortar and brick-mortar joint were determined. Mohr-Coulomb failure envelopes for FaL-G compact and mortar are presented. The mechanism of bond development in masonry is discussed. FaL-G brick masonry shows considerably higher bond strength when compared with the bond strength of conventional brick masonry. Results of micro-structure analysis (SEM, XRD and TGA) of the FaL-G brick-mortar interfaces confirm the formation of chemical bond in addition to mechanical interlocking of cement hydration products into brick pores. Flexural behaviour of FaL-G brick masonry wallettes in the two orthogonal directions was studied. The flexural strength, displacement profiles and load-displacement curves were determined, and moment-curvature relationships were established. Linear elastic analysis performed closely predicted the cracking flexural stress in FaL-G brick masonry. A brief introduction to the computational modelling of masonry using different approaches has been presented. Literature review with respect to simplified micro-modelling approach has been discussed. The flexural behaviour of FaL-G brick masonry panels under lateral loads was predicted using a non-linear 3D finite element analysis. The finite element model reasonably predicted the flexural behaviour of FaL-G brick masonry panels. The thesis ends with summary of research work with a note on scope for further research.

<p>I en försäkringsavtalssituation har försäkringstagaren dels en huvudförpliktelse att betala försäkringspremien, dels ett antal biförpliktelser att ta hänsyn till för att försäkringsersättning skall komma att utbetalas. En av dessa biförpliktelser är räddningsplikten, vilken skall beaktas vid ett eventuellt försäkringsfall. Räddningsplikten innebär att den försäkrade åtar sig, genom avtalsingåendet, ett visst ansvar för att efter förmåga ingripa när ett försäkringsfall har inträffat eller befaras vara omedelbart förestående. Passivitet i dessa situationer kan leda till nedsättning av försäkringsersättningen. Räddningsplikten kommer till uttryck i 4 kap. 7 § samt 8 kap. 13 § FAL. Vid uppfyllelse av räddningsplikten kan den försäkrade vara tvungen att vidta räddningsåtgärder. Om den försäkrade i försäkringsfallet lyckas begränsa skadan kan ersättning betalas ut även för de extra kostnader som har drabbat den försäkrade vid begränsningen av skadan. Kostnaderna för dessa räddningsåtgärder ersätts enligt 6 kap. 5 § samt 8 kap. 13 § FAL. I denna uppsats diskuteras vilka begränsande åtgärder som bör vidtas för att räddningsplikten skall anses vara uppfylld och hur snabbt dessa åtgärder bör vidtas. Vidare diskuteras vilket syftet räddningsplikten har och vem som skall uppfylla plikten. Utöver detta diskuteras motiven bakom regeln om ersättning för räddningskostnader och vad som grundar rätten till ersättning för räddningskostnader.</p>

I en försäkringsavtalssituation har försäkringstagaren dels en huvudförpliktelse att betala försäkringspremien, dels ett antal biförpliktelser att ta hänsyn till för att försäkringsersättning skall komma att utbetalas. En av dessa biförpliktelser är räddningsplikten, vilken skall beaktas vid ett eventuellt försäkringsfall. Räddningsplikten innebär att den försäkrade åtar sig, genom avtalsingåendet, ett visst ansvar för att efter förmåga ingripa när ett försäkringsfall har inträffat eller befaras vara omedelbart förestående. Passivitet i dessa situationer kan leda till nedsättning av försäkringsersättningen. Räddningsplikten kommer till uttryck i 4 kap. 7 § samt 8 kap. 13 § FAL. Vid uppfyllelse av räddningsplikten kan den försäkrade vara tvungen att vidta räddningsåtgärder. Om den försäkrade i försäkringsfallet lyckas begränsa skadan kan ersättning betalas ut även för de extra kostnader som har drabbat den försäkrade vid begränsningen av skadan. Kostnaderna för dessa räddningsåtgärder ersätts enligt 6 kap. 5 § samt 8 kap. 13 § FAL. I denna uppsats diskuteras vilka begränsande åtgärder som bör vidtas för att räddningsplikten skall anses vara uppfylld och hur snabbt dessa åtgärder bör vidtas. Vidare diskuteras vilket syftet räddningsplikten har och vem som skall uppfylla plikten. Utöver detta diskuteras motiven bakom regeln om ersättning för räddningskostnader och vad som grundar rätten till ersättning för räddningskostnader.

Överensstämmelsen mellan den kombinerade företagsförsäkringens villkor och försäkringsavtalslagen I uppsatsen undersöks hur väl villkoren avseende företagsförsäkring beaktar bestämmelser i försäkringsavtalslagen (2005:104), förkortad FAL. Det gäller både tvingande och dispositiva lagbestämmelser samt huruvida försäkringsbolag uppfyller den informationsplikt som under vissa förutsättningar föreligger. De försäkringsvillkor som används utgörs av befintliga villkor för den kombinerade företagsförsäkringen för små och medelstora företag hos Länsförsäkringar, If Skadeförsäkring och Trygg-Hansa. I uppsatsen framkommer slutsatsen att de granskade försäkringsvillkoren på flera punkter inte beaktar FAL. Detta gäller särskilt avseende informationsplikten, men också avseende de dispositiva bestämmelsernas syfte och motiv och även avseende tvingande bestämmelser. Vad gäller informationsplikten har samtliga försäkringsbolag brister, varav inget av bolagen uppfyller samtliga krav som lagen ställer upp. Vissa försäkringsbolag kan konstateras ha genomfört anpassningen till FAL bättre än andra. I de fall försäkringsvillkoren inte beaktar tvingande lagbestämmelser finns risk för rättsförlust om dessa villkor tillämpas och om skadereglerare och försäkrad inte är bekant med FAL:s bestämmelser.

Magister Educationis - MEd / In this study, it is assumed that non-mother tongue speakers of English are faced with the difficulty of writing and learning in English first additional language (FAL) or second language. In the context of Cape Town, this applies to isiXhosa mother-tongue speaking learners who are taught in an additional language, while their counterparts who speak either English or Afrikaans as a home language are taught through the medium of their home languages from primary to tertiary education. Snow (2014:17) claims that learners acquire academic language skills in the home language and are able to transfer those skills into an additional language e.g. English. In addition, if learners have their home language as the LoLT, language transfer may take place easily and the home language structure can assist them when writing in an additional language such as English. Language transfer, according to Odlin (1989:27), is the influence that 2 culminates from the differences or similarities evident between the target language and any other acquired language. There is a belief that strong proficiency in the home language enhances the learning of an additional language easier through language transfer (Odlin, 1989:1). According to Ellis (1994:302) errors mostly occur when there is a negative transfer from the mother-tongue to target language. Aziakpono and Bekker (2010:49) believe that there is certain terminology that cannot be easily transferred from the home language to the target language. However, the issue is not necessarily the transfer of language but rather the expression thereof, especially with individuals who use the home language more than the target language which is often English in South Africa. With regard to language transfer, it should be taken into account that languages have different phonetic and syntactic structures which may impede the learning of an additional language.

Introdução: A doença de Alzheimer (DA) é considerada um dos importantes pro blemas de Saúde Pública, significando, portanto, grande desafio para a geron tologia e geriatria. É causa mais comum de demência que cursa com declínio cognitivo e funcional e alterações com portamentais, porém, poucos estudos relatam a correlação existente entre o declínio motor, considerando o equilíbrio, a força e a implicação na capacidade funcional e na ocorrência de quedas nessa população, principalmente na fase inicial da DA. Objetivos: Identificar o grau de capacidade funcional dos idosos portadores da DA e adequação do seu ambiente domiciliar propício às suas atividades de vida diária, e ocorrência de quedas, proporcionando, assim, melhor qualidade de vida. Métodos: Foi efetuado um estudo epide miológico descritivo, tipo inquérito pros pectivo. Foram estudados 30 pacientes portadores de DA, com idade acima de 60 anos. Foi utilizada avaliação pes soal do paciente, do ambiente e instru mento de avaliação da Medida de Inde pendência Funcional (MIF). Resultados e Conclusões: Dos pacientes estudados, 60% eram do sexo feminino, 47% a profissão era do lar, o intervalo modal do tempo de DA foi de 1,5 - 2 anos e 57% deles apresentaram pelo menos uma queda. Em relação aos cuidadores, 80% eram do sexo feminino e apresentaram média de idade de 59 anos. Em relação à MIF, foi observado grau 6 (independên cia modificada) nos parâmetros: função banho (70%), controle de esfíncter (27%), função transferência (90%), função locomoção (83%). Na função cognitiva, 100% dos pacientes apresentaram grau 5 em pelo menos uma função. Sobre o ambiente, observou-se que os principais fatores de risco foram calçados inadequados, móveis soltos pelo caminho, altura inadequada do vaso sanitário e ausência de barras de apoio. Através da MIF, pôde-se avaliar o grau de comprometimento das funções cognitivas/sociais e identificar a independência modificada das funções motoras dos pacientes com DA, na fase leve. Embora o número de pacientes estuda dos seja pequeno, contudo as evidências parecem mostrar que aumentou os riscos de quedas em função da MIF e do ambiente. / Alzheimer\'s disease is a major public health problem, meaning that it is considered a great challenge to Geria trics and Gerontology. It is the most common cause of dementia, which leads to cognitive and functional decline and behavioral changes. However, few studies report the existing relation between motor decline (balance), strength, and their influence on function abilities as well as the occurrence of falls among the population afflicted by AD, mainly in its early stage. Objectives: This study aimed to identify the functio nal ability level in AD senior citizens and home setting adjustment for a proper environment in which they could carry out daily activities. It also aimed to identify occurrence of falls in order to provide them with a better quality of life. Methods: A survey-like descriptive epidemiological study was conducted. Thirty AD patients over 60 years old were studied. An assessment of the patients and their environment using the Functional Independence Seale was made. Results: 60% of the patients studied were female and 47% were housewives. Their modal AD time interval was 1.5 - 2.0 years, and 57% of them had had at least one fall. As for caregivers, 80% of them were female and averaged 59 years of age. As for Functional Independence Scale, a level 6 (Altered Independence) was observed in the following parameters: Bathing function (70%), sphincter control (27%), transfer function (90%), and movement function (83%). Regarding cognitive function, 100% of the patients showed a 5 level for at least one function. As re gards environment, the main risk factors were inadequate footwear, pieces of furniture on the way, toilet height, and absence of supporting railing. Conclusion: It was possible to identify cognitive changes and altered independence motor functions through the IFS. Those changes, thus, increased risks of falls posed mainly by environ mental threats. Therefore, IFS is considered a good and important instrument to asses AD patients\' functional ability.

Introdução: A doença de Alzheimer (DA) é considerada um dos importantes pro blemas de Saúde Pública, significando, portanto, grande desafio para a geron tologia e geriatria. É causa mais comum de demência que cursa com declínio cognitivo e funcional e alterações com portamentais, porém, poucos estudos relatam a correlação existente entre o declínio motor, considerando o equilíbrio, a força e a implicação na capacidade funcional e na ocorrência de quedas nessa população, principalmente na fase inicial da DA. Objetivos: Identificar o grau de capacidade funcional dos idosos portadores da DA e adequação do seu ambiente domiciliar propício às suas atividades de vida diária, e ocorrência de quedas, proporcionando, assim, melhor qualidade de vida. Métodos: Foi efetuado um estudo epide miológico descritivo, tipo inquérito pros pectivo. Foram estudados 30 pacientes portadores de DA, com idade acima de 60 anos. Foi utilizada avaliação pes soal do paciente, do ambiente e instru mento de avaliação da Medida de Inde pendência Funcional (MIF). Resultados e Conclusões: Dos pacientes estudados, 60% eram do sexo feminino, 47% a profissão era do lar, o intervalo modal do tempo de DA foi de 1,5 - 2 anos e 57% deles apresentaram pelo menos uma queda. Em relação aos cuidadores, 80% eram do sexo feminino e apresentaram média de idade de 59 anos. Em relação à MIF, foi observado grau 6 (independên cia modificada) nos parâmetros: função banho (70%), controle de esfíncter (27%), função transferência (90%), função locomoção (83%). Na função cognitiva, 100% dos pacientes apresentaram grau 5 em pelo menos uma função. Sobre o ambiente, observou-se que os principais fatores de risco foram calçados inadequados, móveis soltos pelo caminho, altura inadequada do vaso sanitário e ausência de barras de apoio. Através da MIF, pôde-se avaliar o grau de comprometimento das funções cognitivas/sociais e identificar a independência modificada das funções motoras dos pacientes com DA, na fase leve. Embora o número de pacientes estuda dos seja pequeno, contudo as evidências parecem mostrar que aumentou os riscos de quedas em função da MIF e do ambiente. / Alzheimer\'s disease is a major public health problem, meaning that it is considered a great challenge to Geria trics and Gerontology. It is the most common cause of dementia, which leads to cognitive and functional decline and behavioral changes. However, few studies report the existing relation between motor decline (balance), strength, and their influence on function abilities as well as the occurrence of falls among the population afflicted by AD, mainly in its early stage. Objectives: This study aimed to identify the functio nal ability level in AD senior citizens and home setting adjustment for a proper environment in which they could carry out daily activities. It also aimed to identify occurrence of falls in order to provide them with a better quality of life. Methods: A survey-like descriptive epidemiological study was conducted. Thirty AD patients over 60 years old were studied. An assessment of the patients and their environment using the Functional Independence Seale was made. Results: 60% of the patients studied were female and 47% were housewives. Their modal AD time interval was 1.5 - 2.0 years, and 57% of them had had at least one fall. As for caregivers, 80% of them were female and averaged 59 years of age. As for Functional Independence Scale, a level 6 (Altered Independence) was observed in the following parameters: Bathing function (70%), sphincter control (27%), transfer function (90%), and movement function (83%). Regarding cognitive function, 100% of the patients showed a 5 level for at least one function. As re gards environment, the main risk factors were inadequate footwear, pieces of furniture on the way, toilet height, and absence of supporting railing. Conclusion: It was possible to identify cognitive changes and altered independence motor functions through the IFS. Those changes, thus, increased risks of falls posed mainly by environ mental threats. Therefore, IFS is considered a good and important instrument to asses AD patients\' functional ability.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2015-11-12T14:50:39Z No. of bitstreams: 1 CarlosDeSouzaJunior_DISSERT.pdf: 9843701 bytes, checksum: 8e563077102155eb9d912b0e87894399 (MD5) / Approved for entry into archive by Elisangela Moura (lilaalves@gmail.com) on 2015-11-16T13:32:44Z (GMT) No. of bitstreams: 1 CarlosDeSouzaJunior_DISSERT.pdf: 9843701 bytes, checksum: 8e563077102155eb9d912b0e87894399 (MD5) / Made available in DSpace on 2015-11-16T13:32:44Z (GMT). No. of bitstreams: 1 CarlosDeSouzaJunior_DISSERT.pdf: 9843701 bytes, checksum: 8e563077102155eb9d912b0e87894399 (MD5) Previous issue date: 2013-12-20 / As mudan?as naturais e antr?picas que v?m ocorrendo na zona costeira em todo o mundo representam um dos maiores problemas para a sociedade neste s?culo. Essa import?ncia se torna mais evidente devido ? elevada densidade das cidades litor?neas, ? crescente especula??o tur?stico-imobili?ria dessas ?reas e ?s altera??es clim?ticas que tendem a desencadear e acelerar esses processos. Nesse contexto, percebe-se cada vez mais um aumento significativo dos problemas relacionados ? eros?o costeira e recuo de fal?sias no estado do Rio Grande do Norte. A ?rea de estudo desta pesquisa localiza-se na zona costeira do munic?pio de Ba?a Formosa/RN, no litoral oriental-sul do Rio Grande do Norte, e possui uma extens?o de cerca de 1200 m ao longo da praia do Porto. O objetivo principal deste trabalho ? analisar a estabilidade dessas fal?sias, atrav?s de investiga??es de campo, ensaios e an?lises computacionais utilizando o M?todo dos Elementos Finitos e o M?todo de Bishop. Para atender aos objetivos deste trabalho, a ?rea foi subdividida em quatro trechos, e foram aplicados checklists e tamb?m realizados ensaios de caracteriza??o e de cisalhamento direto com materiais obtidos ao longo desses trechos. Os segmentos de fal?sia nessa zona costeira possuem alturas variando em torno de 4 m e 14 m e inclina??es de aproximadamente 40? a 90?. Os solos constituintes das fal?sias foram classificados, em termos gerais, como areias argilosas ou siltosas e argilas arenosas, sendo os solos mais argilosos e variegados pertencentes ? base da fal?sia. As an?lises de estabilidade mostraram que os fatores de seguran?a variaram, no trecho 01, de 2,38 a 6,06, no trecho 02, de 1,01 a 1,62, no trecho 03, de 1,29 a 1,78, e no trecho 04, de 0,83 a 2,48. Assim, os trechos 02 e 03, foram considerados como mais inst?veis. Entretanto, pode-se considerar o trecho 03 como o mais cr?tico devido ? aus?ncia de estruturas de prote??o costeira e ? estreita faixa de praia. Fato que n?o ocorre no trecho 02, o qual possui uma extensa faixa de praia e ? protegido por um muro de arrimo que restringe o acesso dos banhistas ?s ?reas adjacentes do p? da fal?sia. / The natural and anthropogenic changes that are occurring at the coastal zone around the world represent the greatest problem to society in this century. This problem becomes more evident due to high density of coastal cities, to growing tourist-estate speculation of those areas and to climate change that tend to trigger and accelerate the erosive processes that operating in the littoral. In this context, it?s possible perceive ever more a significant increase of problems associated to the coastal erosion and retreat of cliffs in the state of Rio Grande do Norte, where this study area of this search is located. The area is located in the coastal zone of the city of Ba?a Formosa/RN, in south-eastern coast of Rio Grande do Norte, and has a extension of about 1200 meters along the Porto beach. The main objective of this study is to analyze the stability of these cliffs in this region. Through field investigations, testings and computational analysis using the Finite Element Method and Equilibrium Limit Methods. The area was divided into four sections, and were applied checklists, and also realized characterization tests and direct shear tests with materials obtained along these sections. In this manner, it was found that the segments of cliff in this coastal zone have heights around 4 meters to 14 meters and inclinations of approximately 40? to 90?.However the constituents soils of the cliffs were classified, in general terms in accordance to Unified Soil Classification System (USCS), as clayey sands or silty sands, clays of low plasticity, clayey gravels and poorly graduaded sands. The most variegated and clayey soils belong to base of the cliff. The stability analysis showed that the safety factors ranged in section 01, from 1.92 to 4.93, in the section 02, from 1.00 to 1.43, in the section 03, from 1.36 to 1.75 , and section 04, from 1.00 to 3.64. Thus, the sections 02 and 03 were considered more unstable. However, the section 03 can be considered as the most critical section due to the absence of coastal protection structures and the narrow strip of beach.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-03-10T21:25:15Z No. of bitstreams: 1 JoaoRonybertoCavalcanteRibeiro_DISSERT.pdf: 10659688 bytes, checksum: 7ec8ae4a93f2bbc61768b6aa5b4d8027 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-03-17T21:43:40Z (GMT) No. of bitstreams: 1 JoaoRonybertoCavalcanteRibeiro_DISSERT.pdf: 10659688 bytes, checksum: 7ec8ae4a93f2bbc61768b6aa5b4d8027 (MD5) / Made available in DSpace on 2016-03-17T21:43:41Z (GMT). No. of bitstreams: 1 JoaoRonybertoCavalcanteRibeiro_DISSERT.pdf: 10659688 bytes, checksum: 7ec8ae4a93f2bbc61768b6aa5b4d8027 (MD5) Previous issue date: 2015-02-27 / O litoral do Estado do Rio Grande do Norte ? caracterizada pela presen?a de dunas e fal?sias. Estas ?ltimas consistem em taludes com altura de at? 40 metros e inclina??o variando de 30o a 90o com a horizontal. Assim, esta disserta??o teve como objetivo a avalia??o da estabilidade da fal?sia da Ponta do Pirambu em Tibau do Sul/RN, e a realiza??o de um estudo param?trico sobre a estabilidade de uma fal?sia homog?nea considerando como vari?veis a coes?o do material, a altura da fal?sia e a inclina??o do talude. O estudo na Ponta do Pirambu considerou ainda a possibilidade da exist?ncia de uma cobertura coluvionar com espessura variando de 0,50 a 5,00 metros. As an?lises foram realizadas pelo m?todo de Bishop, utilizando o programa GEO5. Na an?lise param?trica foram produzidos gr?ficos que relacionam altura da fal?sia com a inclina??o, para fatores de seguran?a iguais a 1,00 e 1,50; al?m de gr?ficos onde ? poss?vel obter facilmente o menor fator de seguran?a a partir da coes?o, altura da fal?sia e sua inclina??o. Concluiu-se que esses gr?ficos s?o muito ?teis para an?lises preliminares, para a defini??o de ?reas cr?ticas em mapeamentos de riscos em ?reas de fal?sias e para determina??o de uma equa??o para obten??o do menor fator de seguran?a em fun??o dos par?metros de resist?ncia e da geometria de um talude. Em rela??o ? fal?sia da Ponta do Pirambu, os resultados mostraram que a fal?sia est? sujeita a deslizamentos superficiais localizados nos pontos onde pode haver a presen?a do col?vio com espessuras superiores a dois metros. Entretanto, a fal?sia se mant?m est?vel, apresentando fator de seguran?a global igual ou superior a 2,50 na condi??o saturada. / The coastline from Rio Grande do Norte state is characterized for the presence of dunes and cliffs. The latter consist of slopes with height up to 40 meters and inclinations ranging from 30? to 90? wich horizontal. Thus, this dissertation had as objective the evaluation of the stability of cliff from Ponta do Pirambu in Tibau do Sul/RN, and the realization of a parametric study on the stability of a homogeneous cliff considering as variables the material's cohesion, the cliff height and the slope inclination. The study in Ponta do Pirambu considered yet the possibility of the existence of a colluvial cover with thickness ranging from 0.50 to 5.00 meters. The analyzes were performed by Bishop method, using GEO5 software. In parametric analysis were produced graphics that relate height cliff with the inclination, to safety factors equals to 1.00 and 1.50; besides graphics where it is possible easily get the lowest safety factor as from the cohesion, cliff height and its inclination. It was concluded that these graphs are very useful to preliminary analyzes, for the definition of critical areas in risk mappings in areas of cliffs and for determination of an equation for obtaining the lowest safety factor function of the strength parameters and of slope geometry. Regarding the cliff from Ponta do Pirambu, the results showed that the cliff is subject to superficial landslides located in the points where may there be the presence of colluvium with thicknesses greater than two meters. However, the cliff remains stable presenting the global safety factor equal or superior to 2.50 in the saturated condition.