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1
Galano, Lucie. "Montpellier et sa lagune : histoire sociale et culturelle d'un milieu naturel (XIe-XVe)." Thesis, Montpellier 3, 2017. http://www.theses.fr/2017MON30005/document.
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J'étudie la gestion des zones humides et des étangs du Bas-Languedoc durant la période médiévale, en mettant en avant les relations entre la ville de Montpellier et son arrière-pays lagunaire. Mes recherches présentent les différentes juridictions qui possédaient des droits sur la lagune, et la manière dont elles organisaient les exploitations en accord avec les acteurs locaux. J'étudie ainsi l'exploitation des étangs, que ce soit pour la pêche, l'exploitation du sel ou pour la navigationMy studies are on the management of the Bas Languedoc’s lagoon during the Middle Ages and particularly the interaction between the town of Montpellier and its hinterland. My research shows the many jurisdictions of the waters and shores and how the overlords share the rights related to the management of this area. I also study the conditions of the operation of the ponds (fishing, hunting, salt farming and navigation)
2
Viljoen, Christina Elizabeth. "Urban Consulate." Diss., University of Pretoria, 2018. http://hdl.handle.net/2263/63649.
Повний текст джерелаАнотація:
ABSTRACT
Urban Consulate is an exploration of urban exchange and growth within the 21st century paradigm. This dissertation investigates the potential of reclaimed civic space within the city as urban catalyst for participation and growth – a platform with which to regenerate meaningful participation within the urban environments and ensure densification without negation and destruction.
The suburb of Brixton is one of the oldest suburbs in Johannesburg. Located to the west of Braamfontein and viewed as a compartmentalized fragment within the city of Johannesburg, this urban suburb forms the laboratory of investigation for the dissertation. Currently in flux, the area is rezoned for urbanisation and densification within the Johannesburg City plan. There are various proposals to relink the suburb back to the city.
The chosen site of investigation is concerned with harnessing both the local condition and its potential to connect to the city of Johannesburg. In an attempt to redefine concepts of territory and boundary in civic architecture, the investigation is contextually located between urban fragments of suburbia, urban conditions and veld (natural environment). The site is a lost urban asset on the edge of Brixton next to the Sentech Tower. The urban intention is to reprogram the site as part of a productive public landscape, while the programmatic intentions are to enable the urban condition of city growth through facilitating local needs and desire lines. The dissertation therefore blurs the present day distinctions of ‘public’, ‘social’, ‘productive’, and ‘natural’ space while at the same time placing focus on local and socio-economic conditions. It investigates how the support of community and local conditions enables the urban.
The architectural intentions are to “blur” the physical and perceived boundaries between the dweller and the city, the suburban and the urban. The scheme seeks to find how architecture as an enabler of “structures of enchantment” – the ordinary and extraordinary that make up a city – can facilitate individual and collective memory and couple the idea of city and the fantastical with that of home-finding and the everyday. In short, the 21st century approach to design and city-making must shift towards a participative approach in terms of urban exchange and place-making.Mini Dissertation MArch(Prof)--University of Pretoria, 2018.
Architecture
MArch(Prof)
Unrestricted
3
Lam, Pik-yee Bessy, and 林碧儀. "American Consulate and Cultural Centre." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31983431.
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Lam, Pik-yee Bessy. "American Consulate and Cultural Centre." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2595359x.
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Ito, Hikoko, and 伊藤彥子. "The Japanese Consulate and the Japanese Cultural Centre." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31982840.
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Ito, Hikoko. "The Japanese Consulate and the Japanese Cultural Centre." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25951610.
Повний текст джерелаАнотація:
Thesis (M. Arch.)--University of Hong Kong, 1996.Added title page title: Japanese cultural centre in Hong Kong. Includes special report study entitled: Semiotic meaning of Mezirushi in architecture. Includes bibliographical references.
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Wong, Ka-man Carman, and 黃嘉雯. "The French Consulate in HK and the French Cultural Centre." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31982220.
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Wong, Ka-man Carman. "The French Consulate in HK and the French Cultural Centre." Hong Kong : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25944812.
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Schwalbach, Evandro. "[Re]presenting Mozambique: A Mozambican consulate and cultural centre in Cape Town." Master's thesis, University of Cape Town, 2009. http://hdl.handle.net/11427/24584.
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Souza, Karina Marinho de. "Processamento de consultas em redes de sensores sem fio : uma abordagem de detecção de novidades para o controle da qualidade dos serviços de consultas." Universidade de Fortaleza, 2009. http://dspace.unifor.br/handle/tede/83501.
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Previous issue date: 2009-11-19Wireless Sensor Networks (WSNs) are communication networks composed of geographically distributed devices (sensor nodes) which can be used to monitor a variety of physical phenomena in real time. Due to the nature of these devices, WSNs have computational restrictions in terms of data processing and storage, and they are usually prone to failures. The main critical point of these networks, however, is in the way the levels of energy available in the sensor nodes are consumed; if this is done properly, the operational lifetime of the WSN can be prolonged. This work presents an approach for adapting query processing in WSNs based on notions of quality of query service and novelty detection (ND). While the former concept captures the idea of possibly having different queries serviced in different ways by the same WSN, the latter relates to a machine learning technique embedded in the WSN components that allows them to modify their query processing behaviours in a dynamic fashion. This approach aims at the intelligent consumption of the limited resources available in these networks while still trying to deliver the data quality as expected by their users. In this context, four classes of quality of query service have been specified having in mind distinct levels of requirements in terms of accuracy and temporal behaviour of the sensed data. Moreover, a new ND-based algorithm, named AdaQuali (ADAptive QUALIty control for query processing in wireless sensor networks), is introduced in detail as a way to control the activities of sensor nodes through the adjustment of their rates of data collection and transmission. For validation purposes, experiments with a prototype have been conducted over real data, and the results achieved point to gains in terms of energy consumption reduction that vary from 1.73% to 42.99% for different classes of quality of query service in the experiment that varies the number of sensor nodes of the network. KEY WORDS: Wireless Sensor Networks. Query processing. Novelty detection. Quality of query services.
Redes de Sensores Sem Fio (RSSFs) são redes de comunicação compostas por dispositivos de sensoriamento distribuídos geograficamente, nós-sensores, que podem ser empregadas para monitorar fenômenos físicos em tempo real. Devido à natureza física desses dispositivos, as RSSFs são usualmente propensas a falhas e possuem restrições computacionais para armazenar e processar dados. Apesar disso, o ponto crítico dessas redes está no modo como a energia disponível nos nós-sensores é consumida; se isso for feito apropriadamente, a vida operacional da RSSF poderá ser prolongada. Este trabalho apresenta uma abordagem para adaptar o processamento de consultas em RSSFs baseada em noções de qualidade de serviço das consultas e detecção de novidades. Enquanto o primeiro conceito captura a idéia de se possivelmente ter diferentes consultas servidas de diferentes maneiras em uma mesma RSSF, o segundo refere-se a técnicas de aprendizado de máquina embutidas nos seus componentes para possibilitá-los alterar dinamicamente seus comportamentos durante o processamento de consultas. Essa abordagem foca o consumo inteligente dos limitados recursos dessas redes ao passo que tenta manter a qualidade dos dados esperada pelos seus usuários. Nesse contexto, quatro classes de qualidade de serviço de consultas foram definidas tendo-se em conta níveis distintos de requisitos relativos à acurácia e ao comportamento temporal dos dados coletados. Além disso, um novo algoritmo baseado em detecção de novidades, nomeado AdaQuali (ADAptive QUALIty control for query processing in wireless sensor networks), é introduzido em detalhe como uma forma de controlar as atividades dos nós-sensores, através da adaptação de suas freqüências de coletas e transmissões de dados. Para propósitos de validação, experimentos foram conduzidos com um protótipo sobre dados reais, e os resultados apontam para ganhos de conservação de energia que variam de 1,73% a 42,99% para diferentes classes de qualidade de serviço no experimento que varia o número de nós-sensores da rede. PALAVRAS-CHAVE: Redes de sensores sem fio. Processamento de consulta. Detecção de novidades. Qualidade de serviço da consulta.
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Meira, Diorgens Miguel. "Um mecanismo de processamento de consultas distribuído em redes de sensores sem fio." Universidade de Fortaleza, 2007. http://dspace.unifor.br/handle/tede/76604.
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Previous issue date: 2007-11-29A wireless sensor network (WSN) consists of groups of spatially distributed networked sensors sending data to a sink node, called base station. These sensors are usually strongly resource constrained. In a WSN, collected data are passed from sensor to sensor until the base station is reached. Considering common available bandwidths, large data volumes may produce heavy traffic congestion in WSNs. In this work, we advocate the use of database technology in sensor networks to reduce the amount of data to be transmitted by sensors and consequently the data traffic in the network. Since data communication by means of a wireless medium consumes a lot of energy, reducing data transmitted by sensors can improve significantly the sensor network lifetime. This work presents a query engine for processing queries in WSNs. The main goal of the proposed query engine is to improve significantly the sensor network lifetime. The key feature of the proposed engine is to execute queries in a distributed way through the various sensor nodes of a WSN. Experimental results presented in this work prove the efficiency of the proposed query engine.
Uma rede de sensores sem fio (RSSF) consiste de grupos de sensores em rede, distribuídos espacialmente e enviando dados a um nó sumidouro, denominado estação base. Estes sensores em geral são fortemente limitados em recursos. Em uma RSSF os dados coletados são passados de sensor a sensor até que a estação base seja alcançada. Considerando as larguras de bandas mais comuns disponíveis, grandes volumes de dados podem produzir congestionamento no tráfego das RSSFs. Neste trabalho, defendemos o uso de tecnologias de bancos de dados em redes de sensores sem fio para reduzir a quantidade de dados que devem ser transmitidos e, conseqüentemente, reduzir o tráfego de dados na rede. Pelo fato da comunicação através de um meio sem fio consumir grandes quantidades de energia, reduzir a quantidade de dados transmitidos pelos sensores pode melhorar significativamente o tempo de vida da RSSF. Este trabalho apresenta um mecanismo de processamento de consultas em RSSFs. O principal objetivo do mecanismo proposto é melhorar o tempo de vida útil da RSSF, e tem como característica fundamental à execução de consultas de maneira distribuída através de vários nós sensores. Os resultados experimentais apresentados neste trabalho provam a eficiência do mecanismo proposto.
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Gonçalves, Joana Rita Patrício. "Renovação da prescrição sem consulta médica de benzodiazepinas." Master's thesis, Universidade da Beira Interior, 2011. http://hdl.handle.net/10400.6/948.
Повний текст джерелаАнотація:
Introdução: As benzodiazepinas (BZDs) constituem um grupo de fármacos com diferentes aplicações terapêuticas, largamente utilizadas na clínica a partir da década de 60. As BZDs são fármacos seguros, contudo a sua utilização prolongada não é recomendada pelo elevado risco de dependência e tolerância. Portugal destaca-se como um dos países Europeus com maior consumo de BZDs. Esta situação pode ter implicações preocupantes, como alterações cognitivas, quedas, acidentes de viação e risco de desenvolvimento de tolerância e dependência.
O modelo de receita médica renovável aprovado em Portugal visa aumentar a acessibilidade à terapêutica que o doente necessita para tratamentos prolongados, através da repetição da prescrição de fármacos sem consulta médica presencial (RPSCM). A receita médica renovável tem uma validade de 6 meses, possibilitando a prescrição de BZDs por períodos superiores à duração de tratamento recomendada em normas de orientação clínica (NOCs). A dimensão desta realidade e as suas implicações permanecem, no entanto, por estudar.
Objectivo: Identificar a população que RPSCM de BZDs e analisar possíveis indicadores de dependência e tolerância a estes fármacos.
Métodos: Foi efectuado um estudo descritivo numa farmácia comunitária da cidade da Covilhã. Durante 2 meses, todos os utentes que apresentaram uma receita renovável com prescrição de BZDs foram convidados para o estudo e questionados sobre a duração do tratamento com BZDs, eventuais tentativas de suspensão ou substituição terapêutica e possíveis sintomas de tolerância e dependência.
Resultados: Das 755 receitas renováveis, 164 (21,72%) continham BZDs. Do total de RPSCM 74,40% eram referentes a mulheres e 61,60% a idosos. As BZDs com maior RPSCM neste estudo foram o lorazepam (32,30%) e o alprazolam (29,30%) e 95,70% dos doentes apontou a insónia como a causa para o uso da BZD. As BZDs de acção longa e intermédia são as mais usadas para tratar a insónia. A população geriátrica RPSCM maioritariamente de BZDs ansiolíticas de acção intermédia (71,30%) e de acção longa (25,80%). A duração do tratamento com BZDs foi superior a 3 anos em 94,50% dos doentes e 73,20% relatou a existência de sintomas associados a tolerância e dependência. Quanto ao conhecimento sobre o tempo que o tratamento deveria durar 92,70% dos doentes referiu não possuir essa informação e 70,70% revelou não ter sido feita nenhuma tentativa de suspensão do tratamento.
Conclusões: As BZDs são efectivas em tratamentos curtos, contudo a sua utilização prolongada não é recomendada devido a potenciais efeitos adversos. A RPSCM de BZDs é uma prática frequente, com maior prevalência nas mulheres e idosos, maioritariamente para BZDs ansiolíticas de acção intermédia/longa no tratamento da insónia. Os princípios activos mais RPSCM foram o alprazolam e lorazepam, na maioria dos casos para tratamento superior a 3 anos, sem qualquer tentativa de descontinuação. Assim a RPSCM de BZDs parece não reflectir um padrão de utilização de acordo com as NOCs. Os riscos desta prática devem ser ponderados em relação aos seus benefícios em termos de acessibilidade à terapêutica. A colaboração do farmacêutico pode revelar-se importante na sinalização de situações com necessidade de controlo clínico.Introduction: Benzodiazepines (BZDs) are a group of drugs with different therapeutic applications, widely used in the clinic since the sixties. BZDs are safe drugs, but their prolonged use is not recommended owing to their high risk of dependence and tolerance. Portugal stands out as one of the European countries with higher consumption of BZDs. This can have disturbing implications, such as cognitive impairment, falls, traffic accidents and risk of development of tolerance and dependence. The model of renewable prescription approved in Portugal aims to increase the access to therapy that the patient need for prolonged treatment by repeat prescribing without the doctorpatient contact (RPSCM). The renewable prescription is valid for six months, allowing the prescription of BZDs for longer than the recommended duration of treatment in clinical practice guidelines (CPGs). However the dimension of this reality and its implications remain to be studied. Goal: Identify the population that RPSCM of BZDs and possible indicators of dependence and tolerance to these drugs. Methods: A descriptive study was conducted in a community pharmacy in Covilhã. During two months, all users who submitted a renewable prescription of benzodiazepines were asked for the study and asked about the duration of treatment with BZDs, attempts to suspend or replacement therapy and possible symptoms of tolerance and dependence. Results: Of the 755 renewable prescriptions, 164 (21.72%) contained BZDs. Of the total 74.40% were RPSCM concerning women and 61.60% for the elderly. In this study the most prescribed BZDs, trough RPSCM, were lorazepam (32.30%) and alprazolam (29.30%), and 95.70% of patients indicated insomnia as the cause for the use of BZD. The BZDs with long and intermediate duration of action are commonly used to treat insomnia. The majority of the geriatric population have RPSCM mostly to anxiolytic with intermediate (71.30%) and long (25.80%) acting BZDs. The duration of treatment with BZDs was more than 3 years in 94.5% and 73.20% of patients reported the existence of symptoms associated with tolerance and dependence. Regarding to the knowledge of how long the treatment should last, 92.70% of patients reported not having this information and 70.70% had not been made any attempt to suspend the treatment. Conclusions: BZDs are effective in short treatments, however long term use is not recommended due to the potential adverse effects. The RPSCM of benzodiazepines is a common practice, with higher prevalence in women and the elderly, mainly for anxiolytic intermediate/long acting benzodiazepine in the treatment of insomnia. The drugs more prescribed were alprazolam and lorazepam, in most cases used for more than 3 years without any attempt to discontinuation. So RPSCM of benzodiazepines does not seem to reflect a pattern of use according to the CPGs. The risks of this practice must be weighed against the benefits in terms of accessibility to the treatment. The collaboration of the pharmacist may be important in detecting situations requiring clinical management.
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Tannous, Wilfrid. "Lo primer mariner fou savi mercader : la naissance d’une profession plurielle : essai de socio-histoire des marins de Majorque (1229 - ca. 1440)." Thesis, Strasbourg, 2022. https://publication-theses.unistra.fr/restreint/theses_doctorat/2022/tannous_wilfrid_2022_ED519.pdf.
Повний текст джерелаАнотація:
Cette thèse se présente comme un essai de socio-histoire de la profession plurielle de marin dans le royaume de Majorque sur la longue durée, de la conquête de l’île par Jacques Ier d’Aragon en 1229 au soutien majorquin à la conquête du royaume de Naples par Alphonse V le Magnanime dans les années 1440. La substitution de la notion de « professionnel de mer » à celle floue de « gens de mer », employée dans l’historiographie, permet d’observer plus précisément ces hommes, en discernant pour chacun, de manière synchronique et diachronique grâce à la reconstitution de trajectoires individuelles, compétences et activités navales, fonctions à bord, et statut social à terre, dans un contexte médiéval où les statuts juridiques, des aristocrates aux esclaves, occupaient une place centrale dans l’identification des individus et la hiérarchisation de la société majorquine. Dans trois grandes parties successives, l’étude articulée et interdépendante des dimensions pratiques, institutionnelles et sociales de cette professionnalisation offre ainsi des réalités vécues multiples, individuellement et collectivement, tant en mer qu’à terre, qui dépassent le simple cadre normatif présenté dans les différentes coutumes de mer, les collectifs professionnels et les juridictions maritimes en vigueur dans le royaume de MajorqueThis thesis is a socio-historical essay about the plural profession of mariner in the kingdom of Majorca over the long term, from the conquest of the island by James I of Aragon in 1229 to Majorcan support for the conquest of the kingdom of Naples by Alfonso V the Magnanimous in the 1440s. The substitution of the notion of "professional of the sea" for that of "seaman", used in historiography, allows for a more precise observation of these men, discerning for each of them, synchronously and diachronically thanks to the reconstitution of individual trajectories, naval skills and activities, functions on board, and social status on land, in a medieval context where legal status, from aristocrats to slaves, occupied a central place in the identification of individuals and in the hierarchisation of Majorcan society. In three main successive parts, the articulated and interdependent study of the practical, institutional and social dimensions of this professionalisation thus offers multiple lived realities, individually and collectively, both at sea and on land, which go beyond the simple normative framework presented in the different sea customs, professional collectives and maritime jurisdictions in force in the Kingdom of Majorca
14
Damer, Mouminat. "From Syrian Sea to Shining Sea." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10751850.
Повний текст джерелаАнотація:
From Syrian Sea to Shining Sea is a collection of poetry that reflects the lives of Arab-Americans. Whether they may be first generation, Muslim, or immigrants, there is a piece within their self that reflects a longing for the homeland, ties to the motherland, and struggles that arose as a result of the Syrian Civil War. As a first-generation, Arab-American, Muslim woman I wrote these poems through the raw lens that is my experience.
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Matos, Raimundo Tales Benigno Rocha. "Agregação e predição de dados no processamento de consultas em redes de sensores sem fio." Universidade de Fortaleza, 2008. http://dspace.unifor.br/handle/tede/79977.
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Previous issue date: 2008-10-21Over the past few years, many research works in Wireless Sensor Networks (WSN) have been focused on node power saving. In order to achieve this goal, the amount of data sent over the node network should be reduced. In this work, we propose an efficient strategy that aggregates and predicts data in WSN, aiming at to reduce the data volume sent over the network and thus maximizing the network lifetime. The proposed prediction strategy, denote ADAGA-p, is based on linear regression model, using data acquired from one or several sensors. Furthermore, ADAGA-p is fully distributed, being executed in-network by several sensors distributed in a WSN. Experimental results show that ADAGA-p is able to reduce power consumption in WSN. Keywords: DataBase, Aggregation, Data Prediction, Wireless Sensor Networks
Muitas pesquisas em redes de sensores sem fio (RSSF) têm sido desenvolvidas nos últimos anos, com foco na economia de energia dos nós sensores. Para alcançar este objetivo, tais pesquisas utilizam como estratégia a redução de dados enviados na rede. Neste trabalho, é proposta uma estratégia eficiente de agregação e predição de dados em RSSF, com o objetivo de reduzir o volume de dados enviados através da rede e assim maximizando a vida útil desta. A estratégia de predição proposta, chamada ADAGA-p, é baseada em um modelo de regressão linear, utilizando dados obtidos a partir de um ou vários sensores. Além disso, ADAGA-p é totalmente distribuído, sendo executado em rede por vários sensores distribuídos em uma RSSF. Resultados experimentais demonstram que ADAGA-p é capaz de reduzir o consumo de energia em RSSF. Palavras-chave: Banco de Dados, Agregação, Predição de Dados, Redes de Sensores Sem Fio
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Babb, David. "Sea ice motion within the Beaufort Sea." American Geophysical Union, 2013. http://hdl.handle.net/1993/23694.
Повний текст джерелаАнотація:
Sea ice drift and associated forcing mechanisms within the Beaufort Sea are examined within the context of a mechanically weakening Arctic ice pack. Extensive in situ observations of ice drift, ice mass balance and surface winds are supplemented by remotely sensed and modeled data to analyse the forcing of sea ice motion. First we analyse the anomalous export of 13.4 x 103 km2 of sea ice through the Bering Strait during winter 2011-2012. The event highlights a tendency towards increased ice transport through the Bering Strait since 2008 as a result of climate induced weakening of the arctic ice pack. Secondly, as part of the Beaufort Regional Environmental Assessment we analyse the seasonal evolution of ice drift in the Beaufort Sea during Spring as the ice pack transitions from mechanically strong conditions in late winter to weak summer conditions that foster free drift and thus increased ice drift speeds.
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Wilkinson, Jeremy. "Sea ice, convection and the Greenland Sea." Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/25132/.
Повний текст джерелаАнотація:
The region where deep open-ocean convection occurs in the Greenland Sea corresponds to that where a sea ice winter feature, the Odden, usually forms. The role of sea ice in modifying the surface waters to overturn to depth is evaluated through the combination of in siu measurements, satellite imagery, meteorological measurements and drifting buoy data. Results suggest local meteorological and oceanographic conditions govern the ice conditions over the region. The high ambient wave energy precludes the formation of ice beyond the frazil-pancake stage; the changing surface pressure field, due to passing storm systems, influences the daily shape and extent of the Odden and enables pancake ice to expel brine at an increased rate. Finally, the analysis of drifting buoy data reveal that the ice is in free drift. t These characteristics suggests the Odden may be regarded as a large scale latent heat polynya, with the predominately northerly winds blowing newly formed sea-ice constantly southward such that it melts in a different area from that of its formation. This salt separation process whereby the majority of brine is deposited where the ice was formed, and a smaller amount being released, through brine drainage, as the ice drifts with the prevailing wind has important consequences for the spatial and temporal distribution of the salt flux and hence surrounding hydrography. This is clearly demonstrated through the development of a salt flux model, which involves brine drainage and drift. A simple one-dimensional mixed layer model, driven by results of the salt flux model, predicts a strong density enhancement and deepening of the mixed layer over time. It is therefore envisaged that the formation of sea ice, brine drainage and drift are fundamental in eroding the pycnocline between the surface waters and those below. Sea ice should therefore be viewed as a preconditioning activity to deep overturning of the waters of the central Greenland Sea.
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Ferrada, C. Margarita. "Telefónica S.A y el desarrollo de información y consulta. Anáilsis marco jurídico del derecho de información, consulta y participación de los trabajadores de la empresa multinacional telefónica S.A en su filiales de España y Chile." Tesis, Universidad de Chile, 2006. http://www.repositorio.uchile.cl/handle/2250/107694.
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Memoria (licenciado en ciencias jurídicas y sociales)No autorizada por el autor para ser publicada a texto completo
En la presente Tesis, se ha escogido a la empresa multinacional Telefónica S.A. como objeto de análisis del desarrollo de las relaciones laborales dentro de un Grupo Empresarial por diversas razones, entre las cuales se puede señalar el ser una de las 10 mayores compañías de Telecomunicaciones del mundo, siendo la primera multinacional de España por capitalización bursátil y, dentro de Chile, una de las empresas líderes en telefonía fija . Por otra parte, cabe señalar que las filiales de España y Chile representan dos visiones jurídicas completamente diversas. Es así como España ha adoptado un sistema de Bienestar de avanzada protección social, por medio del cual se amparan en forma rigurosa tanto constitucional como legalmente los derechos laborales de sus trabajadores. Por otro lado, Chile a través de su economía social de mercado es un país emergente, el que cuenta con una legislación laboral menos rígida que la europea, con el objeto de atraer inversión extranjera, la que configura el sustento de su desarrollo y progreso.
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Pettenuzzo, Daniele <1977>. "Sea Surface Temperature variations and air-sea physics parametrizations in the Mediterranean Sea." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2867/.
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Hui, Tabitha Cheng Yee. "Steller sea lions and fisheries : competition at sea?" Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/32588.
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A leading hypothesis to explain the decline of Steller sea lions (Eumetopias jubatus) in western Alaska is the reduction of prey abundance or change in prey distributions caused by commercial fisheries. We sought to improve on past studies that attempted to assess competition between sea lions and fisheries by estimating the local amounts of prey accessible to sea lions. We explored the relationships between sea lion population trends, fishery catches and the prey biomass accessible to sea lions around 33 rookeries from 2000-2008. We focused on three commercially important species that dominate the sea lion diet: walleye pollock, Pacific cod and Atka mackerel. We estimated available prey biomass by removing fishery catches from predicted prey biomass distributions in the Aleutian Islands, Bering Sea and Gulf of Alaska; and modelled the likelihood of sea lions foraging at different distances from rookeries (accessibility) using satellite telemetry locations of tracked animals. We combined this accessibility model with the prey distributions to estimate the prey biomass accessible to sea lions by rookery. For each rookery, we compared sea lion population change to accessible prey biomass (estimated using our accessibility model and also within 10, 20 and 50 km of each rookery). Of the 304 statistical models we constructed to compare accessible prey biomass and catch to sea lion population trends, only three relationships were significant. These three suggest that sea lion population change rates increased (became less negative) with increasing accessible pollock biomass in the Aleutian Islands and with cod biomass in the Gulf of Alaska. No relationships were found between sea lion population trends and Atka mackerel biomass. Given that the majority of the relationships we explored were insignificant, it seems unlikely that the availability of pollock, cod or Atka mackerel was limiting sea lion populations in the 2000s. Sea lion population trends appeared to be affected by some unknown factor associated with regional differences. Removing fish catches or adding catch to our predicted distributions of groundfish abundances had no measurable effect on sea lion population trends. These observations suggest that sea lion populations were largely unaffected by fishery removals during this period.
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Bonaduce, Antonio <1980>. "Sea-Level climate variability in the Mediterranean Sea." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4645/.
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Sea-level variability is characterized by multiple interacting factors described in the Fourth Assessment Report (Bindoff et al., 2007) of the Intergovernmental Panel on Climate Change (IPCC) that act over wide spectra of temporal and spatial scales. In Church et al. (2010) sea-level variability and changes are defined as manifestations of climate variability and change. The European Environmental Agency (EEA) defines sea level as one of most important indicators for monitoring climate change, as it integrates the response of different components of the Earths system and is also affected by anthropogenic contributions (EEA, 2011).
The balance between the different sea-level contributions represents an important source of uncertainty, involving stochastic processes that are very difficult to describe and understand in detail, to the point that they are defined as an enigma in Munk (2002). Sea-level rate estimates are affected by all these uncertainties, in particular if we look at possible responses to sea-level contributions to future climate.
At the regional scale, lateral fluxes also contribute to sea-level variability, adding complexity to sea-level dynamics.
The research strategy adopted in this work to approach such an interesting
and challenging topic has been to develop an objective methodology to study sea-level variability at different temporal and spatial scales, applicable in each part of the Mediterranean basin in particular, and in the global ocean in general, using all the best calibrated sources of data (for the Mediterranean): in-situ, remote-sensig and numerical models data. The global objective of this work was to achieve a deep understanding of all of the components of the sea-level signal contributing to sea-level variability,
tendency and trend and to quantify them.
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Von, Eye Maxine Jutta Erika. "Sea ice and convection in the Greenland Sea." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648527.
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Bianchi, Alejandro. "Sea-air CO2 fluxes in the Patagonia sea." Paris 6, 2010. http://www.theses.fr/2010PA066613.
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Les plateaux continentaux sont des régions très productives et pourraient constituer de régions de puits significatif de CO2 pour l’atmosphère. De 2000 à 2006, vingt-deux sections océanographiques sur le plateau continental de la Mer de Patagonie (Projets ARGAU et GEF PATAGONIA) ont permis d'étudier la variabilité saisonnière des différences de pression partielle de CO2 (pCO2) et des flux de CO2 (FCO2) entre la mer et l'atmosphère. Ce travail présente une analyse de l'influence des différentes variables environnementales et des processus physiques et biologiques sur les flux de CO2 à l’interface Océan-Atmosphère en mer de Patagonie. Malgré une variabilité saisonnière importante de pCO2 dans les eaux de surface, la mer de Patagonie constitue un puits pendant toutes les saisons. Dans ce plateau continental, le puits de CO2 est dû à des processus dynamiques (stratification, mélange vertical et fronts) et est intensifié par la pompe biologique. Il est montré que les diatomées sont beaucoup plus efficaces pour le pompage du CO2 que les dinoflagellées. Le premier bilan du CO2 (naturel et anthropique) pour l’Argentine montre que la mer de Patagonie capture une quantité de CO2 similaire aux émissions dues à la consommation d’énergie domestique.
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Vice, President Research Office of the. "Sea Change." Office of the Vice President Research, The University of British Columbia, 2009. http://hdl.handle.net/2429/9510.
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Hoskins, Robyn. "Sea Stories." ScholarWorks@UNO, 2017. http://scholarworks.uno.edu/td/2330.
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Sea Stories is a collection of creative nonfiction essays centered around the growth of a young woman through her experiences with water and ships. The pieces trace the origins of the narrator's tie to water from a childhood involving boating with her dad to sailing a brigantine across the Pacific Ocean and then a six-year career as an officer in the U.S. Coast Guard. The narrator's relationship with her father, predominantly viewed through their shared intimacy with water, is a base theme for the whole collection. Other themes explored in individual essays include reckoning expectations with reality, explorations of the self in and against a group, gender dynamics in military service, and the influence of fiction on life. Sea Stories shows that what we think we know, what we may have only imagined, and on the water, that self-constructed reality can be a dangerous thing.
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Kuninaka, Akira. "Air-sea interactions and water mass structure of the East China Sea and Yellow Sea." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA345980.
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Thesis (M.S. in Physical Oceanography) Naval Postgraduate School, March 1998."March 1998." Thesis advisor(s): Peter C. Chu, Robert H. Bourke. Includes bibliographical references (p. 61-62). Also available online.
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Else, Brent. "Air-sea CO2 cycling in the southeastern Beaufort Sea." American Geophysical Union, 2011. http://hdl.handle.net/1993/8905.
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During the fourth International Polar Year, an interdisciplinary study was conducted to examine the couplings between sea ice, ocean, atmosphere, and ecosystem in the southeastern Beaufort Sea. This thesis examines components of the system that control the air–sea exchange of carbon dioxide. Using eddy covariance measurements, we found enhanced CO2 exchange associated with new ice formation in winter flaw leads. This exchange was typically directed towards the surface, although we also measured one instance of outgassing. Sea surface dissolved CO2 measurements (pCO2sw) in Amundsen Gulf showed significant undersaturation with respect to the atmosphere at freeze–up, followed by a slow increase over the winter until spring phytoplankton blooms caused strong undersaturation at break–up. Over the summer, pCO2sw increased until becoming slightly supersaturated due to surface warming. Along the southern margins of Amundsen Gulf and on the Mackenzie Shelf we found pCO2sw supersaturations in the fall due to wind–driven coastal upwelling. In the spring, this upwelling occurred along the landfast ice edges of Amundsen Gulf. By combining observations of enhanced winter gas exchange with observations of pCO2sw in Amundsen Gulf, we derived an annual budget of air–sea CO2 exchange for the region. This exercise showed that uptake through the winter season was as important as the open water season, making the overall annual uptake of CO2 about double what had previously been calculated.
Prior to this work, the prevailing paradigm of air–sea CO2 cycling in Arctic polynya regions posited that strong CO2 absorption occurs in the open water seasons, and that a potential outgassing during the winter is inhibited by the sea ice cover. As a new paradigm, we propose that the spatial and temporal variability of many processes – including phytoplankton blooms, sea surface temperature and salinity changes, upwelling, river input, continental shelf processes, and the potential for high rates of winter gas exchange – need to be considered in order to understand the carbon source/sink status of a given Arctic polynya region. A paradigm that considers such varied processes is useful in understanding how climate change in the Arctic can impact air–sea CO2 exchange.
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Schulz, Eric Werner mathematics UNSW. "Air-sea flux parameterisations in a shallow tropical sea." Awarded by:University of New South Wales. mathematics, 2002. http://handle.unsw.edu.au/1959.4/18659.
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This thesis is a study of the air-sea fluxes of momentum, sensible heat and latent heat. Fluxes are estimated using the covariance, COARE2.6b bulk flux algorithm, and inertial dissipation methods. The bulk algorithm is validated against the covariance fluxes for the first time in a light-wind, shallow tropical sea, with strong atmospheric instability and low sea state conditions. The removal of ship motion contamination is investigated. This is the first study to quantify the errors associated with corrections for ship motion contamination, and the effects of motion contamination on the covariance calculated heat fluxes. Flow distortion is investigated. Bulk transfer coefficients and roughness lengths are computed and related to the sea state. Ship motion contamination is successfully removed in 86% of the runs. Error analysis of the motion removal algorithm indicates maximum uncertainties of 15% in the wind fluctuations, and 0.002 N/m/m for the wind stress. Motion correction changes the stress by more than 15% in half of the runs analysed. The ship is found to accelerate the mean air flow and deflect it above the horizontal. A correction is developed for the air flow acceleration. The scalar fluxes show good agreement on average for all the methods. As wind speed approaches zero, covariance wind stress is significantly larger than the bulk and inertial dissipation derived wind stress. The non-zero covariance wind stress is reflected in the drag coefficient, CdN10, and momentum roughness length, z0, which are much larger than the parameterisations used in the bulk algorithm. The MCTEX CdN10, wind speed (u10N) relation is 1000 x Cd10N = 1.03 + 7.88/(u10N)^2 0.8 < u10N < 7.5 m/s z0 is primarily a function of wind speed rather than sea state, with largest roughness lengths occurring as wind speed approaches zero. This relation is used in the bulk algorithm, yielding good agreement between covariance and bulk derived wind stress. A new parameterisation for the effects of gustiness, based on wind variance is developed. This brings the bulk wind stress into agreement with the covariance derived wind stress.
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Bramson, Laura S. "Air-sea interactions and deep convection in the Labrador Sea." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA342378.
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Thesis (M.S. in Meteorology and M.S. in Physical Oceanography) Naval Postgraduate School, December 1997."December 1997." Thesis advisor(s): Peter Guest, Roland Garwood. Includes bibliographical references (p. 73-74). Also available online.
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Hentati-Sundberg, Jonas. "SEA CHANGE : Social-ecological co-evolution in Baltic Sea fisheries." Doctoral thesis, Stockholms universitet, Stockholm Resilience Centre, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-122372.
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Sustainable management of natural resources requires an in-depth understanding of the interplay between social and ecological change. Linked social-ecological systems (SES) have been described as complex adaptive systems (CAS), which mean that they are irreducible, exhibit nonlinear dynamics, have interactions across scales and are uncertain and unpredictable. These propositions have however rarely been tested empirically, in part due to a lack of methodological approaches and suitable datasets. In this thesis, I address this methodological and empirical gap in a study of long-term change of Baltic Sea fisheries. In Paper I, we develop the concept of fishing style through integrating multivariate statistical analysis and in-depth interviews. We thereby identify an intermediate level of detail for analyzing social-ecological dynamics, embracing the case specific and context dependent approaches of the social sciences with the generalizable and quantifiable approaches from the natural sciences. In Paper II we ask: How has the Baltic Sea fishery been regulated over time, and can we identify a way to quantify regulations in order to be able to analyze their effects? We analyze all regulatory changes in Sweden since 1995 with a new methodology and conclude that there is a clear trend towards increased micro-management. In Paper III, we use the fishing styles developed in Paper I and examine how they have changed over time. We relate these changes to the dynamics of regulation (Paper II), as well as to the dynamics of fish stocks and prices. We conclude that regulation has been the main driving force for observed changes, but also that regulation has prompted significant specialization and decline in flexibility for fishers over time. These changes are unintended consequences and may represent a looming risk for the long-term sustainability of this social-ecological system. Paper IV zooms in on a particular fishery, the pelagic trawl fishery for sprat Sprattus sprattus and Atlantic herring Clupea harengus, mainly targeted for the production of fishmeal and fish oil. Suspicions of non-compliance in this fishery motivated us to apply a statistical approach where we used socioeconomic data to re-estimate the historical catches in this fishery (a novel approach to catch-reconstruction estimates). We found that catches had been significantly underreported over several years, with consequences for the quality of stock assessments and management. The study underlines the importance of understanding linked social, economic and ecological dynamics for sustainable outcomes. Finally, Paper V takes a longer historical look at the Baltic Sea fishery, using regionally disaggregated data from 1914-2009 (96 years), which were analyzed with a novel type of nonlinear statistical time-series methods (Empirical Dynamical Modeling). Our analysis explicitly recognized the potential nonlinear dynamics of SES and showed high predictability across regions of catches and prices of cod Gadus morhua and herring. The signal was generally nonlinear and predictability decreased strongly with time, suggesting that the dynamics of this SES are ever-changing. To our knowledge, this is the first long-term analysis of a SES using empirical data and methods developed from the CAS field of research. The main contributions of this thesis are the integrated analysis of social and ecological data, the development of novel methods for understanding SES dynamics, insights on the ever-changing nature of CAS and the quantitative analysis of management outcomes. Future work should focus on assessing the generality of these findings across a broad range of SES and evaluate alternative governance approaches given the complexity and uncertainty of SES suggested by this thesis.At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 5: Manuscript.
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Lea, Daniel James. "Joint assimilation of sea surface temperature and sea surface height." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393382.
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Huddleston, M. R. "Modelling the sea ice thickness distribution in the Greenland Sea." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604716.
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Following a detailed review of the history and theory of sea ice modelling in the Arctic, a further review is made of previous analysis of the ice thickness distribution. In addition to this, ten new or partially cited upward looking sonar ice draft datasets derived from moored buoys and submarine profiles have been used to provide a detailed set of statistics for comparison with modelled ice thickness distribution functions in the Greenland Sea. The moored sonar buoys datasets are from the period 1991-1994 and the submarine datasets are from the spring seasons of 1987 and 1991. Suitable atmospheric and oceanic forcing fields for 1991-94 have been derived from UK Meteorological Office unified model simulations and analysis and verified for a sea ice model of the Arctic Ocean and Greenland Seas. The model represents the sea ice thickness distribution using 28 levels of ice after Flato and Hibler [1995]. The use of synoptic daily varying winds is shown to create coastal polynyas and the application of spatially and temporally varying precipitation fall generated a realistic snow cover. An extensive comparison of modelled and observed ice thickness distributions is presented for the Greenland Sea. Ice fluxes for Fram Strait have been produced using a variety of methods using data from moored upward looking sonar thickness distributions, SSM/I ice concentrations and International Arctic Buoy Programme derived drift data. Results show that it is important to include the variation in the thickness and velocity fields both spatially and temporally across Fram Strait in the calculation of ice fluxes. The modelled variation in the velocities, thickness distributions and the ice fluxes in Fram Strait compare well with the observations although the absolute value of the fluxes are too low due to excessive winter oceanic heat fluxes. When the observed fluxes were used in a boundary-forced Greenland Sea regional model, it was shown that the mechanisms that preferentially melt ridged ice types not present in the model but the decay of the mean thickness of the ice downstream can be represented. Overall, the model results emphasise the need for further work on dynamic-thermodynamic coupling in ice models to resolve these processes.
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Siddall, Mark. "Paleo-circulation of the Red Sea and global sea level." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396754.
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Roy, Indrani. "Solar signals in sea level pressure and sea surface temperature." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6038.
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We investigate solar cycle signals in 150 years of Sea Level Pressure (SLP) and Sea Surface Temperature (SST) data, using multiple regression analysis. We detect a solar signal in both SLP and SST in the North Pacific during DJF, similar to that found by Van Loon et al. (2007) but of smaller magnitude. We do not, however, identify the signal they found in the tropics. Our results do not support mechanisms for a solar influence on climate directly involving tropical SSTs. We have used different reconstructions of total solar irradiance to investigate the sensitivity of the results. The series of Krivova & Solanki and Foster give similar results to those acquired using sunspot number but the Hoyt & Schatten solar index sometimes produces different results because of mixing of the solar signal with a long-term trend. Using different approaches Labitzke and van Loon (1992) and Camp and Tung (2007), arrived at different results for a solar influence on winter stratospheric polar temperatures and its relationship to the quasi-biennial oscillation (QBO) in tropical stratospheric zonal winds. We show that these differences appear different largely because of their choices of QBO height. We also show that the effect of the QBO (30, 40 or 50 hPa) combined with solar activity reveals a clear signal in polar annular modes expressed in SLP. We show that the nature of ENSO was different before 1950s (and after1997): this may affect any solar influence. Other authors have suggested that tropical circulations were different during the intervening period. Such observation may have implications relating to the sun, tropical circulation and climate change. During 1958-1997, omission of ENSO from regression gives false warming (cooling) signal of higher (lower) solar on SST in tropics. Such analysis, accompanied by our observation that the years of peak annual sunspot number used by van Loon et al. (2007) generally falls a year or more in advance of the maximum of the smoothed DSO, provides coherence to some apparently conflicting findings. Finally, an atmosphere-ocean coupling process, (mainly involving the Pacific Ocean) is proposed to account for the solar influences. This coupling appears to be disturbed during the later half of the 20th century, probably due to climate change.
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Moreton, Steven Grahame. "Quaternary tephrochronology of the Scotia Sea and Bellingshausen Sea, Antarctica." Thesis, University of Gloucestershire, 1999. http://eprints.glos.ac.uk/4865/.
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The Southern Ocean is a region of the world's ocean which is fundamental to the generation of cold deep ocean water which drives the global thermo-haline circulation. Previous investigations of deep-sea sediment cores south of the Polar Front have been significantly constrained by the lack of a suitable correlation and dating technique. In this study, deep-sea sediment cores from the Bellingshausen, Scotia and Weddell seas have been investigated for the presence of tephra layers. The major oxide and trace element composition of glass shards have been used to correlate tephra isochrones over distances in excess of 600 km. The source volcanoes for individual tephra layers have been identified. Atmospheric transport distances greater than 1500 km for >32 μm shards are reported. One megascopic tephra is identified and correlated across 7 sediment drifts on the continental rise in the Bellingshausen Sea. Its occurrence in a sedimentary unit that has been biostratigraphically dated to δ^18 0 substage 5e identifies it as a key regional marker horizon for that stage. An unusual bimodal megascopic ash layer erupted from Deception Island, South Shetland Islands, has been correlated between 6 sediment cores which form a 600 km NW-SW transect from the central Scotia Sea to Jane Basin. The megascopic ash layer has been ^14C dated at 10,670 years BP. It represents the last significant input of tephra into the Scotia Sea or Jane Basin from that volcano and forms an important early Holocene marker horizon for the region. Five disseminated tephras can be correlated to varying extents across the central Scotia Sea cores. Together with the megascopic tephra they form a tephrostratigraphic framework that will greatly aid palaeoclimatic, palaeoenvironmental and palaeoceanographic investigations in the region.
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Gutiérrez-Loza, Lucía. "Mechanisms controlling air-sea gas exchange in the Baltic Sea." Licentiate thesis, Uppsala universitet, Luft-, vatten- och landskapslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-409744.
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Carbon plays a major role in physical and biogeochemical processes in the atmosphere, the biosphere, and the ocean. CO2 and CH4 are two of the most common carbon-containing compounds in the atmosphere, also recognized as major greenhouse gases. The exchange of CO2 and CH4 between the ocean and the atmosphere is an essential part of the global carbon cycle. The exchange is controlled by the air–sea concentration gradient and by the efficiency of the transfer processes. The lack of knowledge about the forcing mechanisms affecting the exchange of these climate-relevant gases is a major source of uncertainty in the estimation of the global oceanic contributions. Quantifying and understanding the air–sea exchange processes is essential to constrain the estimates and to improve our knowledge about the current and future climate. In this thesis, the mechanisms controlling the air–sea gas exchange in the Baltic Sea are investigated. The viability of micrometeorological techniques for CH4 monitoring in a coastal environment is evaluated. One year of semi-continuous measurements of air–sea CH4 fluxes using eddy covariance measurements suggests that the method is useful for CH4 flux estimations in marine environments. The measurements allow long-term monitoring at high frequency rates, thus, capturing the temporal variability of the flux. The region off Gotland is a net source of CH4, with both the air–sea concentration gradient and the wind as controlling mechanisms. A sensitivity analysis of the gas transfer velocity is performed to evaluate the effect of the forcing mechanisms controlling the air–sea CO2 exchange in the Baltic Sea. This analysis shows that the spatio-temporal variability of CO2 fluxes is strongly modulated by water-side convection, precipitation, and surfactants. The effect of these factors is relevant both at regional and global scales, as they are not included in the current budget estimates.
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Stampe, Elin. "Sonar Sea : The acoustic experience of the Baltic Sea dynamics." Thesis, Konstfack, Inredningsarkitektur & Möbeldesign, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-7830.
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This thesis project aims to discuss the conditions and importance of water as a dynamic body in our environment, as water is affecting life on Earth on all levels. By focusing on the Baltic Sea, a sensitive body of water, I am exploring the acoustic characters of the sea dynamics through sound recordings at three bays in the Stockholm Archipelago. How can an acoustic exploration of the Baltic Sea dynamics mediate a sensitive relationship to our marine environments? Sound defines environments and gives indications of their current state. In this project, I intertwine an artistic approach involving our senses with scientific research of measuring to further an understanding of the relationship between humans and nature. The project explores water and sound in two parts, first as a method for listening to the sea, second as a spatial composition created for a sensory experience of the sea’s endless motion. It is my hope that my installation can stir emotions and create an understanding for the environmental challenges facing the Baltic Sea and inspire action towards prosperous natural environments where we live with and not apart from nature.
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Thunblom, Viktor, and Robert Nyberg. "CLEAN SEA : ALGSKÖRDNINGSMASKIN." Thesis, University of Kalmar, Kalmar Maritime Academy, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-2505.
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Smith, Marian Brunn. "A Fugitive Sea." VCU Scholars Compass, 2007. http://hdl.handle.net/10156/1952.
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Hart, Chase M. "On sea-goats." Connect to this title online, 2008. http://etd.lib.clemson.edu/documents/1211390464/.
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Van, de Noort Robert. "North Sea archaeologies." Thesis, University of Exeter, 2011. http://hdl.handle.net/10036/3312.
Повний текст джерелаАнотація:
North Sea Archaeologies traces the way people engaged with the North Sea from the end of the last ice age, around 10,000 BC, to the close of the Middle Ages, about AD 1500, drawing upon archaeological research from many countries, including the UK, Netherlands, Germany, Denmark, Sweden, Norway, Belgium, and France. It addresses topics which include the first interactions of people with the emerging North Sea, the origin and development of fishing, the creation of coastal landscapes, the importance of islands and archipelagos, the development of seafaring ships and their use by early seafarers and pirates, and the treatment of boats and ships at the end of their useful lives. The study offers a ‘maritime turn’ in Archaeology through the investigation of aspects of human behaviour that have been, to various extents, disregarded, overlooked, or ignored in archaeological studies of the land. The study concludes that the relationship between humans and the sea challenges the frequently invoked dichotomy between pre-modernity and modernity, since many ancient beliefs, superstitions, and practices linked to seafaring and engagement with the sea are still widespread in the modern era.
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Gray, J. M. N. T. "Sea ice dynamics." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240183.
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Oyedokun, Titus Oluwale. "Sea clutter simulation." Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/14557.
Повний текст джерелаАнотація:
Includes bibliograpical references.This dissertation presents the results of a study, the aim of which was the prediction of sea clutter characteristics including the temporal properties of the return signals as observed by a maritime surveillance radar system. The compound K distribution model used to generate clutter amplitude statistic enables the simulation of sea clutter with a good level of approximation to real radar data and this model forms the basis for the simulation of sea clutter amplitude statistic in this dissertation. Using this distribution, a sea clutter simulator is designed to generate correlated K distributed random variates from a predefined correlation function using the method by Ward and Tough [1 ]. Results from the sea clutter simulator shows that the simulated correlated random variates fit the theoretical K distribution PDF. Experimental sea clutter measurements were carried out using an experimental netted radar system. This was done at Scarborough Cape Town. Result obtained from the monostatic node is presented. This shows the amplitude statistics of the clutter as well as the temporal variation of the Doppler spectrum. Conclusions are drawn based on this results and suggestions made for further work.
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Jakub, Lucy(Lucy Marita). "Sea of change." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/130207.
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Thesis: S.M., Massachusetts Institute of Technology, Department of Humanities, September, September, 2020Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 13-16).
The Gulf of Maine is warming at a faster rate than 99.9 percent of the world ocean, a trend with uncertain implications for the last great maritime fishery: American lobster. Every year, fishermen, scientists, and managers wait to see if the fishery reverses its fantastic growth, which has been a salutary effect of climate change over the past three decades. The gulf has as many horizons as it has islands, and nobody knows the whole thing. Like the story of the blind men and the elephant, every person you ask, even the most expert, will describe a different gulf to you, and a different crisis. What's clear is that the ecosystems of the region have been shaped by many different pressures: domesticated by management, depleted by overfishing, shuffled by natural climatic cycles. The future of the gulf will depend not just on the trajectory of ocean warming, but on whether people can rethink the way we use the environment, and adapt to a changing world.
by Lucy Jakub.
S.M.
S.M. Massachusetts Institute of Technology, Department of Humanities
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Chen, Hao. "Late Pleistocene palaeoenvironmental reconstruction using sediment cores from the Bohai Sea, the Huanghai Sea and the Arabian Sea." Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/14477.
Повний текст джерелаАнотація:
This thesis studied 9 sediment cores from the Bohai Sea (JX91-2A and JX91-3B), the Huanghai Sea (JX91-7m and 7G) and the Arabian Sea (cores 1733, 1734a, 1735, 1736 and 1739) through a multi-disciplinary approach including geochemistry, sedimentology, rock magnetism and radiochemistry. The purpose of this study is to retrieve the sedimentary records, characterise and compare the virtually different sedimentation processes in the Chinese and Arabian regions, and to reconstruct regional and trans-continental palaeoenvironmental changes since the Late Pleistocene. The main conclusions drawn from this study concerning A) the China Seas, B) the Arabian Sea and C) palaeoenvironment in the two regions include: A1. The Huanghe River plays a key role in the sedimentation in the Bohai and Huanghai Seas, and its well documented channel switching can be directly correlated with the lithological changes in the sediments; A2. Estuarine turbidity current can be formed in the Bohai Sea in a different way from that in deepwater, owing to the extremely turbid riverwater and highly diluted seawater; but it cannot in the Huanghai Sea; A3. Huanghe estuarine sediment in the Bohai Sea can be linked to the recent soil erosion on the Loess Plateau through geochemical and palaeomagnetic indicators, viz. P, Ti, REE and magnetic susceptibility; B1. Sediments in the Gulf of Oman in the Arabian Sea are generally of aeolian origin, though coarser sands can be found either as saltation population in nearshore cores or as cyclone deposits on the Murray Ridge; B2. Monsoonal variations since the Late Pleistocene in terms of both wind strength and wind direction are responsible for the lithological changes in the Arabian sediments directly, and biogeochemical changes indirectly, through the wind-driven coastal upwelling system in the Arabian Sea.
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Reddy, Tasha Elise. "Oceanography of the Ross Sea : ocean circulation, sea ice, and phytoplankton /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
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Tadross, Mark Alexander. "Microwave remote sensing of young sea ice in the Greenland Sea." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624765.
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Nelis, Patrick M. "The transfer of radionuclides from sea to land in sea spray." Thesis, University of Edinburgh, 1990. http://hdl.handle.net/1842/15496.
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This thesis reports on an investigation into the transport inland in sea spray of radionuclides discharged into the Irish Sea from the nuclear plant at Scllafield in Cumbria. The work was carried out in response to a concern about the increased incidence of childhood leukaemia in the vicinity of Britain's nuclear reprocessing facilities. It is proposed that the sea spray transfer is an important pathway of discharged radioactivity into the human environment. The inland transfer of contaminated sea spray was investigated on the beach at Drigg, between 6 and 10 km south of the BNFL Scllafield marine discharge pipeline, through which significant levels of radionuclides have been flushed since 1952. The radionuclide concentrations of coastal marram grass vegetation and collected on exposed muslin screen passive droplet collectors are reported. The method used to determine the mass of sea-salt collected by the exposed screens is described and the results of these measurements presented. The collection of the natural atmospheric radionuclide 7Bc on the exposed muslin screens was used to extract the effects of the changing wind flow on the collection of the spray droplets at different distances inland. This allowed an elucidation of the true reduction in the radionuclide air concentrations with distance from the sea. The Sellafield-produced radionuclides present on the exposed screens were found to decrease with distance inland at the same rate as the collected sea-salt, implicating the sea spray droplets as the carriers of the radioactivity. A model of the inland transfer of sea spray droplets produced in the turf zone along the shoreline is described. The collection of the contaminated spray in coastal soil, vegetation and muslin screen collectors is simulated. This model gives results which fit the measured reduction in radionuclide air concentrations with distance from the sea. A successful application to datasets of the inland transfer of spray and radioactivity reported elsewhere is also illustrated. The analysis of the changing surface air concentration with distance inland illustrated that the initially rapid reduction measured here and elsewhere is due more to the spray droplets being mixed to higher altitudes than their deposition to the ground. An analysis of a sea spray collection event in which very high radionuclide air concentrations were measured calculates that under certain conditions 1 km of coastline can produce 1.54xl05Bq of 239+240pu and 1.10xl05Bq of 241Am per hour. This material is thought to be efficiently transported inland in sea spray, and 60% of it is calculated to be still airborne 1 km from the coast. It is concluded that the sea spray transport of marine discharged radioactivity transfers significant levels of long-lived radionuclides to the land, much of it in the respirable size range, and that this material can be carried to large distances from the sea. This pathway merits further investigation as the causes of the increased leukaemia incidence in West Cumbria are sought.
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Morrison, Isobel. "Desert To Sea: White Fantasies, Red Rivers, and The Salton Sea." Scholarship @ Claremont, 2017. http://scholarship.claremont.edu/scripps_theses/1070.
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In the middle of the California Desert is an inland desert sea, called the Salton Sea. Its existence is curious, nearly magical. It is California’s largest lake, it is saltier than the Pacific Ocean, it is slowly dying, and its existence is a complete accident. This thesis breaks down the historical narrative of the Salton Sea from a white settler perspective, using theories posed by Yi Fu Tuan about distinctions between space and place. The temporality of spatial locations, the construction of the binaries natural/built, and the moralizing of landscapes all provide further understanding of the Salton Sea’s existence. Throughout history, the white settlers of the Imperial Desert have projected, their morals and desires upon the desert landscape, reforming the space into their vision of the future as a result of their abilities to tame and control rivers. Instead of a future, they produced a place replete with the past: a place considered worthless and potentially dangerous. Through looking at the constructions of space, place, memory, and history, we are better able to understand the birth of this desert sea.
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Torres, Parra R. Ricardo. "Sea-level variability in the Caribbean Sea over the last century." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/367215/.
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Mean sea level rise exposes coasts to increasing risks. For the Caribbean Sea, the regional and local sea-level behaviour is not well known. This study has investigated the sea level behavior in the region at different frequencies during the last century, to provide updated, accurate and useful information to implement coastal adaptation responses to sea-level hazards. Time series from 28 tide-gauges, 18 years of altimetry and various atmospheric and oceanographic climatologies have been used. Several new results have been found. The small Caribbean tides have significant long-term modulations. The net effect of the low frequency modulation of the tidal signal can change the maximum tidal range up to 23.5%. The seasonal sea level cycle is characterized by large spatial and temporal variability. The amplitude of the coastal annual harmonic ranges from 2 cm to 9 cm, peaking between August and October. The amplitude of the semi-annual harmonic has maximum amplitude of 6 cm but it is not significant at all stations. The barometric effect dominates the coastal semi-annual cycle, but it is insignificant in all the other sea level frequencies at the tide-gauges. The seasonal sea level cycle from altimetry confirms the results obtained from the tide-gauges and allows the identification of some dominant sea level forcing parameters such as the Panama-Colombia gyre driven by the wind stress curl and the Caribbean Low Level Jet modulating the sea level in the northern coast of South America and linked to the local upwelling. The basin average mean sea level rise from altimetry is 1.7±1.3 mm yr-1 for the period 1993-2010. Wind forcing changes causes the trends in the southern part of the basin, modulating the sea level through changes in the ocean circulation. Significant spatial and decadal variability of the trends is found. Secular coastal sea-level trends range from 1.3±0.2 mm yr-1 in Magueyes, where the steric contribution dominates, to 5.3±0.3 mm yr-1 in Cartagena, where other contributors including local vertical land movements are significant. Temporal changes in the sea level extremes are significant but in line with mean sea-level trends at each tide gauge. With the annual mean sea level removed, extremes range between 36 cm and 79 cm, the later recorded in Port Spain and caused by the largest tidal signal. The largest nontidal residual is 76 cm found in Magueyes, forced by a hurricane induced storm surge, however larger surges can occur in the basin. The interannual sea level signal and nontidal extremes correlate with El Niño-Southern Oscillation at different time and spatial scales. No correlation with the North Atlantic Oscillation is found at any frequency. The largest sea flooding probability in the Caribbean coasts is around October, when the different sea level contributors’ maximums interact. These sea flooding events are going to became more frequent in the future due to the secular mean sea level rise affecting the basin.