5,909 research outputs found

    Shoes of our ancestors in Bahia. The Companhia de Calcados Trocadeiro (1879-1923)

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    The Neogene of Portugal

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    After a briefhistorical introduction, this paper deals with the main concerned geotectonic units: the Lower Tagus and Alvalade basins, the Western and Southern borders, and their infillings. Most of the Neogene events and record concern areas South of the Iberian Central Chain, a nearly inverse situation as that of Paleogene times. In the most important of these units, the Lower Tagus basin, there are quite thick detrital series, mostly marine in its distal part near Lisboa (albeit with several continental intercalations), and mainly continental in its inner part. Sedimentological record is almost complete since Lowermost to Upper Miocene. The richness ofdata (paleontology, isotope chronology, paleoclimate, etc.) it gives and the possibility of direct marine-continental correlations render this basin one of the more interesting ones in Western Europe. Alvalade basin is separated from the previous one by a barrier ofPaleozoic rocks. Two transgressions events (Upper Tortonian and Messinian in age) are recorded. Active sedimentation may be correlated to Late Miocene tectonics events. In Algarve, chiefly marine units from Lower to Upper Miocene are well developped. The Lower unit (Lagos-Portimao Formation) is best exposed in Western Algarve, but desappears eastwards. Middle Miocene is not as well known, whereas Upper Miocene main outcrops are in Eastern Algarve. Cacela Formation is remarquable for its beautiful fossils. Sedimentation as a whole refletcts the tectonic activity and in special the evolution of the Algarve flexures. There is scant evidence of post-Lower Miocene volcanism, the latest known in Portugal. Pliocene has not been recognized there beyond doubt. . Miocene sediments are much less important to the North of the Central Iberian Chain. Continental beds near Leiria that yielded the well-known "Hisp anotherium fauna" are lower Middle Miocene. Pliocene corresponds to dramatic changes in paleogeography. At Setiibal Peninsula there is some evidence of a minor Lower Pliocene transgression. Continental detrital sediments, often coarse, occupy rather large areas. In Western Portugal between the Seta hal Peninsula and Pombal there is good evidence of a marine Upper Pliocene transgression, followed up by dune sands overlain by marsh clays, diatomites, lignites and boghead levels that can be partly Pleistocene in age

    Noise correction on LANDSAT images using a spline-like algorithm

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    Many applications using LANDSAT images face a dilemma: the user needs a certain scene (for example, a flooded region), but that particular image may present interference or noise in form of horizontal stripes. During automatic analysis, this interference or noise may cause false readings of the region of interest. In order to minimize this interference or noise, many solutions are used, for instane, that of using the average (simple or weighted) values of the neighboring vertical points. In the case of high interference (more than one adjacent line lost) the method of averages may not suit the desired purpose. The solution proposed is to use a spline-like algorithm (weighted splines). This type of interpolation is simple to be computer implemented, fast, uses only four points in each interval, and eliminates the necessity of solving a linear equation system. In the normal mode of operation, the first and second derivatives of the solution function are continuous and determined by data points, as in cubic splines. It is possible, however, to impose the values of the first derivatives, in order to account for shapr boundaries, without increasing the computational effort. Some examples using the proposed method are also shown

    The Neogene of Portugal

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    After a brief historical introduction, this paper deals with the main concerned geotectonic units: the Lower Tagus and Alvalade basins, the Western and Southern borders, and their infillings. Most of the Neogene events and record concern areas South of the Iberian Central Chain, a nearly inverse situation as that of Paleogene times. In the most important of these units, the Lower Tagus basin, there are quite thick detrital series, mostly marine in its distal part near Lisboa (albeit with several continental intercalations), and mainly continental in its inner part. Sedimentological record is almost complete since Lowermost to Upper Miocene. The richness ofdata (paleontology, isotope chronology, paleoclimate, etc.) it gives and the possibility of direct marine-continental correlations render this basin one of the more interesting ones in Western Europe. Alvalade basin is separated from the previous one by a barrier of Paleozoic rocks. Two transgressions events (Upper Tortonian and Messinian in age) are recorded. Active sedimentation may be correlated to Late Miocene tectonics events. In Algarve, chiefly marine units from Lower to Upper Miocene are well developped. The Lower unit (Lagos-Portim√£o Formation) is best exposed in Western Algarve, but desappears eastwards. Middle Miocene is not as well known, whereas Upper Miocene main outcrops are in Eastern Algarve. Cacela Formation is remarquable for its beautiful fossils. Sedimentation as a whole refletcts the tectonic activity and in special the evolution of the Algarve flexures. There is scant evidence of post-Lower Miocene volcanism, the latest known in Portugal. Pliocene has not been recognized there beyond doubt. Miocene sediments are much less important to the North of the Central Iberian Chain. Continental beds near Leiria that yielded the well-known "Hisp anotherium fauna" are lower Middle Miocene. Pliocene corresponds to dramatic changes in paleogeography. At Setiibal Peninsula there is some evidence of a minor Lower Pliocene transgression. Continental detrital sediments, often coarse, occupy rather large areas. In Western Portugal between the Set√ļbal Peninsula and Pombal there is good evidence of a marine Upper Pliocene transgression, followed up by dune sands overlain by marsh clays, diatomites, lignites and boghead levels that can be partly Pleistocene in age

    Cloud provider independence using DevOps methodologies with Infrastructure-as-Code

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    On choosing cloud computing infrastructure for IT needs there is a risk of becoming dependent and locked-in on a specific cloud provider from which it becomes difficult to switch should an entity decide to move all of the infrastructure resources into a different provider. There‚Äôs widespread information available on how to migrate existing infrastructure to the cloud notwithstanding common cloud solutions and providers don't have any clear path or framework for supporting their tenants to migrate off the cloud into another provider or cloud infrastructure with similar service levels should they decide to do so. Under these circumstances it becomes difficult to switch from cloud provider not just because of the technical complexity of recreating the entire infrastructure from scratch and moving related data but also because of the cost it may involve. One possible solution is to evaluate the use of Infrastructure-as-Code languages for defining infrastructure (‚ÄúInfrastructure-as-Code‚ÄĚ) combined with DevOps methodologies and technologies to create a mechanism that helps streamline the migration process between different cloud infrastructure especially if taken into account from the beginning of a project. A well-structured DevOps methodology combined with Infrastructure-as-Code may allow a more integrated control on cloud resources as those can be defined and controlled with specific languages and be submitted to automation processes. Such definitions must take into account what is currently available to support those operations under the chosen cloud infrastructure APIs, always seeking to guarantee the tenant an higher degree of control over its infrastructure and higher level of preparation of the necessary steps for the recreation or migration of such infrastructure should the need arise, somehow integrating cloud resources as part of a development model. The objective of this dissertation is to create a conceptual reference framework that can identify different forms for migration of IT infrastructure while always contemplating a higher provider independence by resorting to such mechanisms, as well as identify possible constraints or obstacles under this approach. Such a framework can be referenced from the beginning of a development project if foreseeable changes in infrastructure or provider are a possibility in the future, taking into account what the API‚Äôs provide in order to make such transitions easier.Ao optar-se por infraestruturas de computa√ß√£o em nuvem para solu√ß√Ķes de TI existe um risco associado de se ficar dependente de um fornecedor de servi√ßo espec√≠fico, do qual se torna dif√≠cil mudar caso se decida posteriormente movimentar toda essa infraestrutura para um outro fornecedor. Encontra-se dispon√≠vel extensa documenta√ß√£o sobre como migrar infraestrutura j√°‚Äā existente para modelos de computa√ß√£o em nuvem, de qualquer modo as solu√ß√Ķes e os fornecedores de servi√ßo n√£o disp√Ķem de formas ou metodologias claras que suportem os seus clientes em migra√ß√Ķes para fora da nuvem, seja para outro fornecedor ou infraestrutura com semelhantes tipos de servi√ßo, caso assim o desejem. Nestas circunst√Ęncias torna-se dif√≠cil mudar de fornecedor de servi√ßo n√£o apenas pela complexidade t√©cnica associada √† cria√ß√£o de toda a infraestrutura de raiz e movimenta√ß√£o de todos os dados associados a esta mas tamb√©m devido aos custos que envolve uma opera√ß√£o deste tipo. Uma poss√≠vel solu√ß√£o √© avaliar a utiliza√ß√£o de linguagens para defini√ß√£o de infraestrutura como c√≥digo (‚ÄúInfrastructure-as-Code‚ÄĚ) em conjun√ß√£o com metodologias e tecnologias ‚ÄúDevOps‚ÄĚ de forma a criar um mecanismo que permita flexibilizar um processo de migra√ß√£o entre diferentes infraestruturas de computa√ß√£o em nuvem, especialmente se for contemplado desde o in√≠cio de um projecto. Uma metodologia ‚ÄúDevOps‚ÄĚ devidamente estruturada quando combinada com defini√ß√£o de infraestrutura como c√≥digo pode permitir um controlo mais integrado de recursos na nuvem uma vez que estes podem ser definidos e controlados atrav√©s de linguagens espec√≠ficas e submetidos a processos de automa√ß√£o. Tais defini√ß√Ķes ter√£o de ter em considera√ß√£o o que existe dispon√≠vel para suportar as necess√°rias opera√ß√Ķes atrav√©s das ‚ÄúAPI‚Äôs‚ÄĚ das infraestruturas de computa√ß√£o em nuvem, procurando sempre garantir ao utilizador um elevado grau de controlo sobre a sua infraestrutura e um maior n√≠vel de prepara√ß√£o dos passos necess√°rios para recria√ß√£o ou migra√ß√£o da infraestrutura caso essa necessidade surja, integrando de certa forma os recursos de computa√ß√£o em nuvem como parte do modelo de desenvolvimento. Esta disserta√ß√£o tem como objetivo a cria√ß√£o de um modelo de refer√™ncia conceptual que identifique formas de migra√ß√£o de infraestruturas de computa√ß√£o procurando ao mesmo tempo uma maior independ√™ncia do fornecedor de servi√ßo com recurso a tais mecanismos, assim como identificar poss√≠veis constrangimentos ou impedimentos nesta aproxima√ß√£o. Tal modelo poder√° ser referenciado desde o in√≠cio de um projecto de desenvolvimento caso seja necess√°rio contemplar uma poss√≠vel necessidade futura de altera√ß√Ķes ao n√≠vel da infraestrutura ou de fornecedor, com base no que as ‚ÄúAPI‚Äôs‚ÄĚ disponibilizam, de modo a facilitar essa opera√ß√£o.info:eu-repo/semantics/publishedVersio

    On the hydrogeology of the Lower Tagus Basin and its Cenozoic geologic evolution

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    The chemical features of the ground water in the Lower Tagus Cenozoic deposits are strongly influenced by lithology, by the velocity and direction of the water movement as well as by the localization of the recharge and discharge zones. The mineralization varies between 80 and 900 mg/l. It is minimal in the recharge zones and in the Pliocene sand and maximum in the Miocene carbonated and along the alluvial valley. Mineralization always reflects the time of permanence, the temperature and the pressure. The natural process of water mineralization is disturbed in agricultural areas because the saline concentration of the infiltration water exceeds that of the infiltrated rainwater. In the discharge zones, the rise of the more mineralized, some times thermal deep waters related to tectonic accidents give rise to anomalies in the distribution of the aquiferous system mineralization model. The diversity of the hydrochemical facies of the ground water may be related to several factors whose identification is some times difficult

    Unilateral vicious mastication ‚Äď The importance and resolution: a case report

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    Introduction: Patients presenting Temporomandibular Disorders (TMD) are common in our daily clinical practice. One of the possible conditions that lead to TMD is the habitual chewing side syndrome.Methods: In this case report a clinical approach is presented to manage the TMD related to unilateral vicious mastication. A 42 years old woman presented reporting headaches, difficulty to open mouth, presence of sensitivity in the left ear and TMJ region, soreness on the left side temporal region and sensitivity in the anterior inferior teeth. It was noted that the patient habitually clenched and ground teeth. Patient mentioned chew more on the left side.Results: After confirming the unilateral mastication, a modified therapy based on the Neuro occlusal Rehabilitation was applied through the use of a splint. After 60 days the patient described absence of the previous symptoms and pain relief.Conclusion: The evaluation of the masticatory pattern is often neglected; however, it is of great importance since it can lead to several conditions such as condyle wear, pain, alteration of the occlusal plane, deviation of the medial line, deviation of the mandible at mouth opening, bone alterations, Temporomandibular joint(TMJ) hypofunction, headache, among others

    A duna consolidada de Oitavos, a Oeste de Cascais, região de Lisboa : a sua datação pelo método do radiocarbono

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    A duna consolidada de Oitavos, atribu√≠da ao Quatern√°rio, situa-se junto ao litoral, a oeste de Cascais. Apresenta-se o programa de data√ß√Ķes pelo radiocarbono que permitiu a data√ß√£o dessa duna e discute-se a fiabilidade das datas obtidas. Processaram-se amostras de Helix provenientes n√£o s√≥ da duna de Oitavos, mas tamb√©m da duna consolidada de Magoito, localizada cerca de 16 km para norte e j√° devidamente datada por aquele m√©todo de data√ß√£o absoluta, e ainda amostras de um contexto arqueol√≥gico da Encosta de Sant'Ana (Baixa da cidade de Lisboa), com o objectivo de aferir a validade das data√ß√Ķes de Oitavos sobre Helix. Tamb√©m o paleossolo existente na base da duna de Oitavos foi objecto de data√ß√£o. Determinou-se assim uma data de elevada fiabilidade para a gera√ß√£o da duna de Oitavos, indicando que esta se ter√° formado no intervalo 33-30 ka BP, provavelmente durante o interestadial que precede a fase final do OIS 3
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