Pipeline steels that carry oil and natural gas in severe environments suffer from two important modes of failure: stress corrosion cracking (SCC) and hydrogen-induced cracking (HIC). The SCC has been studied extensively in the literature; however, HIC phenomenon in pipeline steels is less investigated by researchers. Nevertheless, HIC is recognized as the most important damage mode in sour environment. Hydrogen atoms produced due to surface corrosion of the steel diffuse into it through microstructural defects. When a critical amount of hydrogen is accumulated in such defects, HIC cracks initiate and propagate. The main objectives of this thesis are to find the HIC crack nucleation and propagation sites, evaluate a role of texture and grain boundary character distribution in crack growth and finally establish the effect of different microstructural parameters contributing to the HIC related failure in pipeline steel. In this thesis, HIC standard test and electrochemical hydrogen-charging experiments were used to induce HIC cracks in pipeline steels. HIC cracks at the cross section of tested samples were observed using scanning electron microscope (SEM). The SEM observations clearly indicate that the investigated X60 and X70 steels are susceptible to HIC while the X60SS steel showed a higher resistance to HIC. This experiment also proved that the X70 steel has higher susceptibility to HIC than the other investigated steel. Energy dispersive spectroscopic (EDS) analyses indicated that two types of inclusion namely manganese sulfide and carbonitiride precipitates serve as crack nucleation sites. HIC cracks were observed to propagate at the center of cross section where the segregation of some elements such as carbon and manganese occurred. Moreover, two other experiments were carried out in order to evaluate the capability of pipeline steels for hydrogen-trapping. The first test, hydrogen-permeation experiment, showed that all pipeline steel specimens, such as X70, X60 and X60SS steels, contain both reversible and irreversible hydrogen traps. However, the density of traps at the center of cross section was higher than other regions in all tested specimens. The hydrogen-discharging experiments also showed that all specimens keep a considerable amount of hydrogen inside their traps. The hydrogen traps, based on their binding energy with the metal matrix, are categorized as reversible (weak) and irreversible (strong) traps and the roles of each type of traps are explained. Electron backscatter diffraction (EBSD) measurements were done along the HIC crack in X70 steel after standard HIC test. The results showed that the {100} texture was strong while the {111} texture was weak. Some special texture components, such as the {110}, {332} and {112}, were observed after the HIC crack-stoppage. EBSD results also documented that fine grain colonies were prone to intergranular HIC crack propagation and IPF and PF, calculated in both sides of HIC cracks, showed the preferences of ND||<100> orientation. Both susceptible X60 and non-susceptible X60SS steel to HIC were compared based on the EBSD results. It was observed that the high amount of recrystallization fraction with no stored energy is one of the main reasons for a higher HIC resistance of X60SS steel to HIC. Moreover, Kernel Average Misorientation (KAM) data showed that the deformation is more concentrated in the as-received and HIC tested X60 specimens. The effect of hydrogen-charging during tensile/fatigue loading of X60SS steel was studied and it was observed that some HIC cracks at the cross section of X60SS steel were appeared after hydrogen-charging at stresses below the yield stress. Experiments were carried out to understand the effect of cold-rolling and annealing on HIC susceptibility in pipeline steels. The results documented that the {100} dominant texture is more pronounced in 50% and 90% cold-rolled and annealed specimens. The effect of different factors such as KAM degree and recrystallized fraction affecting HIC susceptibility on cold-rolled and annealed specimens was investigated. The obtained results showed that the cold-rolling and annealing process may not be considered as an effective method to increase HIC resistance in pipeline steels.

O presente trabalho consta da descrição explicativa dos processos de ocupação da Região das Missões Jesuítico-Guarani, que contribuíram para que a mesma tenha se constituído hoje, em uma \"Região Turística Transfronteiriça\". Sua configuração atual resulta do processo de expansão colonial ibérica e das relações que se estabeleceram entre os colonizadores e os habitantes locais e, entre ambos e o ambiente com seus recursos. Constatou-se que sua singularidade é uma conseqüência dos processos históricos que são evidenciados em três períodos bem característicos: Período pré-jesuítico: caracterizado pela organização dos Guarani em pequenas comunidades, que ocupavam os lugares com solo fértil para a prática da agricultura, como as várzeas dos grandes rios, vales e lugares com matas. Mantinham uma relação ecológica com o território, retirando da terra somente o necessário à sua sobrevivência. Período jesuítico: no qual houve a ?redução? da comunidade indígena, que passou a manter uma nova forma de se relacionar com o território; implantando, ao mesmo tempo, um sistema de produção coletivo-complementar, aliado a um sistema comercial responsável por enviar, para a Europa, produtos como sebo, erva-mate, algodão, chifre e couro. Período pós-jesuítico: vai, desde a derrocada das Missões até os dias de hoje. Caracterizado pelos desajustes sociais, econômicos e ambientais, frutos das expansões agropecuárias, mineiras e industrial, baseada em um modelo que se caracterizou pelo deterioramento do meio ambiente como custo necessário ao progresso, não se mostrou viável para resolver os problemas econômicos e sociais da população regional. Esse período caracteriza-se também pela busca de soluções para os problemas regionais, através da dinamização do uso público do rico patrimônio histórico-cultural através do turismo. Surgem projetos e programas voltados para a dinamização do turismo regional, no entanto os mesmos não atingiram totalmente os objetivos a que se propuseram. O uso do método evolutivo histórico, a partir da pesquisa bibliográfica e da pesquisa de campo, com observação direta sistematizada e realização de entrevistas, proporcionou o alcance dos objetivos de: analisar a importância das Missões Jesuíticas na consolidação das fronteiras do sul do Brasil; analisar a situação dos sítios arqueológicos das antigas reduções jesuítico-Guarani, avaliar a importância dos remanescentes arquitetônicos das reduções como potencial turístico; analisar os programas e projetos propostos para a Região das Missões em relação ao turismo, além de fornecer subsídios que possam contribuir para a implementação, intensificação e expansão da atividade turística regional. / The present work is a descriptive explanation of the processes of the occupation of the Jesuit-Guarani Missions, which ended up transforming it into a tourist atiraction beyond borders. Its present-day status is a result of the relations which have been established between the Iberian sett and the Local inhabitants and among themselves, and the environment with its resources. It can be said that its singularity is a consequence of the history´s processes which are evident in three welI-defined periods: Pre-Jesuit period it is characterized by the organization of the Guarani Indians in small communities which occupied places having a fertile soil, good for agriculture, like the flat lands along rivers, valleys and woodland. They maintained an ecological relation with lhe territory, extracting from the soil only the every day necessities for their survival. Jesuit Period: in which there was a \"reduction\" of the Indian community and which started a new way of interaction with the territory, irnplementing, at the same time, a coilective cornplementary production system together with a business-like system responsible for sending to Europe products like tallow, mate, cotton, horn and leather. Post-Jesuit Period: beginn ing since the destruction of the Missions till nowadays. lt is characterized by social , economical and environmental due to agronornic , mineral and industrial expansion, based on a model which is characterized by the deterioration of the environment as a by-product of progress, not being able to solve the economic and social problems of the regional population. This period is also characterized because of a search for solutions for regional problems, through a dynarnic use of its rich cultural-historical touristic patrirnony. The use of lhe historical evolutionary rnethod, through bibliographic and field research, with direct and systematic observation and interviews Ied to the following objectives: to analyze the irnportance of lhe Jesuit Missions in the consolidation of the Southern Brazilian boundaries; to analyze the situation of the archeological sites of the former Jesuit-Guarani reductions, to evaluate the importance of lhe architectonic remainings of the old Jesuit-Guarani reductions as a touristic potential; tlo analyze the prograrns and the projects destined to the Missions Region as far as tourism is concerned, besides best subsidies which can contribute in the implementation, intensification and expansion of lhe regional tourism activity.

O presente trabalho consta da descrição explicativa dos processos de ocupação da Região das Missões Jesuítico-Guarani, que contribuíram para que a mesma tenha se constituído hoje, em uma \"Região Turística Transfronteiriça\". Sua configuração atual resulta do processo de expansão colonial ibérica e das relações que se estabeleceram entre os colonizadores e os habitantes locais e, entre ambos e o ambiente com seus recursos. Constatou-se que sua singularidade é uma conseqüência dos processos históricos que são evidenciados em três períodos bem característicos: Período pré-jesuítico: caracterizado pela organização dos Guarani em pequenas comunidades, que ocupavam os lugares com solo fértil para a prática da agricultura, como as várzeas dos grandes rios, vales e lugares com matas. Mantinham uma relação ecológica com o território, retirando da terra somente o necessário à sua sobrevivência. Período jesuítico: no qual houve a ?redução? da comunidade indígena, que passou a manter uma nova forma de se relacionar com o território; implantando, ao mesmo tempo, um sistema de produção coletivo-complementar, aliado a um sistema comercial responsável por enviar, para a Europa, produtos como sebo, erva-mate, algodão, chifre e couro. Período pós-jesuítico: vai, desde a derrocada das Missões até os dias de hoje. Caracterizado pelos desajustes sociais, econômicos e ambientais, frutos das expansões agropecuárias, mineiras e industrial, baseada em um modelo que se caracterizou pelo deterioramento do meio ambiente como custo necessário ao progresso, não se mostrou viável para resolver os problemas econômicos e sociais da população regional. Esse período caracteriza-se também pela busca de soluções para os problemas regionais, através da dinamização do uso público do rico patrimônio histórico-cultural através do turismo. Surgem projetos e programas voltados para a dinamização do turismo regional, no entanto os mesmos não atingiram totalmente os objetivos a que se propuseram. O uso do método evolutivo histórico, a partir da pesquisa bibliográfica e da pesquisa de campo, com observação direta sistematizada e realização de entrevistas, proporcionou o alcance dos objetivos de: analisar a importância das Missões Jesuíticas na consolidação das fronteiras do sul do Brasil; analisar a situação dos sítios arqueológicos das antigas reduções jesuítico-Guarani, avaliar a importância dos remanescentes arquitetônicos das reduções como potencial turístico; analisar os programas e projetos propostos para a Região das Missões em relação ao turismo, além de fornecer subsídios que possam contribuir para a implementação, intensificação e expansão da atividade turística regional. / The present work is a descriptive explanation of the processes of the occupation of the Jesuit-Guarani Missions, which ended up transforming it into a tourist atiraction beyond borders. Its present-day status is a result of the relations which have been established between the Iberian sett and the Local inhabitants and among themselves, and the environment with its resources. It can be said that its singularity is a consequence of the history´s processes which are evident in three welI-defined periods: Pre-Jesuit period it is characterized by the organization of the Guarani Indians in small communities which occupied places having a fertile soil, good for agriculture, like the flat lands along rivers, valleys and woodland. They maintained an ecological relation with lhe territory, extracting from the soil only the every day necessities for their survival. Jesuit Period: in which there was a \"reduction\" of the Indian community and which started a new way of interaction with the territory, irnplementing, at the same time, a coilective cornplementary production system together with a business-like system responsible for sending to Europe products like tallow, mate, cotton, horn and leather. Post-Jesuit Period: beginn ing since the destruction of the Missions till nowadays. lt is characterized by social , economical and environmental due to agronornic , mineral and industrial expansion, based on a model which is characterized by the deterioration of the environment as a by-product of progress, not being able to solve the economic and social problems of the regional population. This period is also characterized because of a search for solutions for regional problems, through a dynarnic use of its rich cultural-historical touristic patrirnony. The use of lhe historical evolutionary rnethod, through bibliographic and field research, with direct and systematic observation and interviews Ied to the following objectives: to analyze the irnportance of lhe Jesuit Missions in the consolidation of the Southern Brazilian boundaries; to analyze the situation of the archeological sites of the former Jesuit-Guarani reductions, to evaluate the importance of lhe architectonic remainings of the old Jesuit-Guarani reductions as a touristic potential; tlo analyze the prograrns and the projects destined to the Missions Region as far as tourism is concerned, besides best subsidies which can contribute in the implementation, intensification and expansion of lhe regional tourism activity.

Lines are everywhere and as humans we produce lines all the time. In this project I used the line as a method, a metaphor, and a material to explore what are the elements that influence and condition the way we move and behave around different spaces. Lines can be read as many things and for this project I choose to work with lines that could be understood as boundaries and limits. How do we deal with lines in our everyday life? How do lines and bodies influence each other? How is the space choreographed and experienced according to the boundaries that exist in it?   However not all boundaries are made of matter. In fact, some of them are invisible and manifest as prohibitions, regulations, prejudice, or just cultural norms. These limits can also be understood as non-matter lines that have an impact on one's experiences. Through several explorations, the project proposes an installation that seeks to embody the spatial boundaries that cannot always be seen. Using light and sound as catalyzers for these experiences, the installation is a reflection on what happens when we meet those invisible lines, how they have the power to change our usual path and to make us move differently around a space.

No description available.

A restrained relationship between the Soviet Union and Japan, great military and economic powers and geographically close neighbors in Northeast Asia, is an international anomaly of considerable magnitude. Resolution of this anomaly has been delayed for the last forty-five years by several factors, but none more so than that of what has commonly been referred to as the "Northern Territories" dispute. The territorial dispute of the Northern Territories, otherwise known as the four islands of Etorofu, Kunashiri, Shikotan and the Habomai group is discussed in relation to both the historical and contemporary policies of Japan and the USSR. According to the Soviet’s perspective these islands belong to them on the basis of their military annexation in 1945. Japan fails to recognize this sovereignty, hence, leaving Japan and the USSR in a technical state of war, impeding normal Soviet-Japanese relations. Presently, Gorbachev’s policy of Perestroika has indicated the possibility of concessions and rapprochement over the islands after forty-five years of consistent deadlock. This new Soviet policy is aimed at improving relations with Japan and moving toward more economic and political cooperation, allowing the Soviets to participate in the economic prosperity of the Pacific Basin. However, Japan refuses to comply with such concessions, and demands Soviet recognition of the territorial issue prior to negotiations. Furthermore, opposition toward such conciliation exists in the USSR since any concession might lead China and other nations to press their own territorial claims. Thus, the political, economic and strategic implications of the Northern Territories problem ensures that it will remain a critical contemporary geopolitical issue in Northeast Asia. / Master of Science

The boundaries of the cities are not immutable, they can be changed. With the development of the economies and societies, the population and pollution of cities are increasing. Some urban areas are expanding with more population or other dynamics of urbanization, while other urban areas are reducing with the changing of the dynamics. Therefore, detecting urban areas or delineating the boundaries of the cities is one of the most important steps for urban studies, which is closely related to human settlements and human activities. Remote sensing data (RS) is widely used to monitor and detect land use and land cover on the surface of the earth. But the extraction of urban areas from the ordinary RS data is not easy work. The Operational Linescan System (OLS) is the sensors of the Defense Meteorological Satellite Program (DMSP). The nighttime lights from the DMSP/OLS provide worldwide remotely sensed data to analyze long-term light emissions which are closely related to human activities. But the nighttime lights imagery data contains inherent errors. Therefore, the approaches to calibrate the data and extract the urban areas from the data are complicated. The long-term objective of this thesis is to delineate the boundaries of the natural cities of the continental United States of America (USA) from 1992 to 2010 of nightlight imagery data with all the different satellites. In this thesis, the coefficients for the intercalibration of the nightlight imagery data have been calculated based on the method developed by Elvidge, et al. (2009), but the coefficients are new and available. The approach used to determine the most appropriate threshold value is very important to eliminate the possible data error. The method to offset this possible error and delineate the boundaries of the cities from nightlight imagery data is the head/tail breaks classification, which is proposed by Jiang (2012b). The head/tail breaks classification is also useful for finding the ht-index of the extracted natural cities which is developed by Jiang and Yin (2013). The ht-index is an indicator of the underlying hierarchy of the data. The results of this study can be divided into two categories. In the first, the achieved coefficients for the intercalibration of nightlight images of the continental USA are shown in a table, and the achieved data of the urban areas are stored in a data archive. In the second, the different threshold values of the uncalibrated images and the individual threshold value of the calibrated images are shown in tables, and the results of the head/tail breaks classification and power law test are also drawn. The results show that the acquired natural cities obey the power law distribution. And the results also confirm that the head/tail breaks classification is available for finding a suitable threshold value for the nightlight imagery data. Key words: cities’ boundaries; DMSP/OLS; head/tail breaks classification; nighttime lights; power law; urban areas

No description available.

The fullest and most comprehensive unpacking of the term finis has yet to be achieved. Studies have narrowly focussed on the idea of border, boundary or frontier, without even entertaining the prospect of interpreting the study from the ancient point of view. This investigation considers the use of the word finis in Livy and attempts to recreate a conception of finis which mirrors as closely as possible that of a Roman of the Republic up to the very Early Empire. Besides the remarkably high usage of the term by Livy, the author’s work is also useful due to its chronological nature, which allows for broad investigation throughout the Republican Period, as well as shedding light on the Early Imperial concept of finis. The main aim of this dissertation is to provide a collective analysis of diverse cases, which together can help build a complete picture of the detectable features related to the term finis. As well as this, the analysis of the contexts – in which the term finis is used has also cast light on those features of finis – that have remained fixed despite the different historical contexts in which they appear. For example, throughout my study, two fundamental concepts will continue to pop up in front of the reader’s eyes: a) the inapplicability of modern conceptual categories to the idea of finis and b) finis – if translated as border, boundary or frontier – as a concept applicable not to a line, but to a spatial element. On the basis of Livy’s evidence – drawn from his work Ab Urbe Condita – this study attempts to present a reconstruction of the term through the identification of an entirely new concept. This study is conceived in terms of a crescendo, which begins with the basic definitions attached to finis and evolves, adding an increasing number of evidences until it reaches a climax, whereby the reader can see both those invariable features of finis in Livy’s account and the 4 Introduction: Research guidelines evolution of the term as fines are applied within different political contexts. Rome – a city that rose on a finis, the Tiber River – reinvented or remodelled the concept of finis, demonstrating behaviour antithetical to the notion of confining herself behind a ‘single line’. Once identified as a finis, the natural features helped the Romans to exert their imperium, which was itself an embodiment of the features contained within the concept of finis. The establishment of the fines provided an ‘imaginary’ subdivision of the territory subjected to the Roman imperium in a series of land strips. This is documented by Livy through Rome’s expansionist ‘finis-system’, from a single occupation of the Janiculum Hill to the scientific approach and setting of the treaty of Apamea. Although the lacunae in Ab Urbe Condita – from 168 B.C. onwards – do not permit a direct connection between the Late Republic and the Early Empire, some elements can be used to evidence an intimate relationship between Livy’s and Augustus’ thinking and terminology. To some extent, this common intent has made possible this attempted reconstruction of the ‘bordering practices’ used in the last 150 years of the Republic, as well as the possible evolution of such practices in the first 150 about years of the Empire.

Due to the emergent and dynamic nature of incidents, the complexity of emergency work is often referred to as a challenge for learning. Another recurrent challenge in emergency work is that of collaboration at and across established organizational boundaries involving actors with specific types of expertise who are operating under different regulations and responsibilities. In addition, training emergency service organizations in collaboration remains a challenge. In light of the difficulties and shortcomings that have been identified in major incident responses, the need for exercises for developing and maintaining collaborative response effectiveness prior to the next incident is often highlighted. The overall aim of this thesis is to understand how full-scale exercises can provide conditions for developing inter-organizational collaboration between the police, ambulance and rescue services at the incident site. Learning activities that carry the potential to support and develop collaborative capacity, and how the alignment of distributed expertise can be trained for, were of particular interest. Interviews with participants in eight full-scale exercises with professionals and interviews and observations of one exercise with senior-level students in Sweden served as the empirical base.Central concepts from Cultural-Historical Activity Theory (CHAT) provided theoretical tools to explore the exercises and understand boundaries between organizations with a wider, systemic approach. The empirical studies show that the participants understood full-scale exercises to be valuable opportunities for becoming involved in response work, making decisions, and acting and interacting in uncertain situations and realistic environments. As in real-life responses, exercises are characterized by the stabilization and confirmation of everyday routines on the one hand, and by improvisation and change on the other hand. The studies also show that exercises tend to focus on specific scenarios,intra-organizational routines, and leadership positions. Infrequent exercises inwhich the participants were only trained in a limited role were perceived to be in adequate for developing preparedness and collaboration. However, the analysis suggested that the way in which exercises were organized and performed had implications for how participants were trained in collaboration.Realizing the potential of boundaries as resources for learning in exercises depends on how boundaries are explicated and approached. Thus, rather than striving to ignore or eliminate boundaries in exercises, the studies illustrated the learning value of explicitly reflecting on the multiple understandings around boundaries. The studies demonstrated that much of the work at an incident site takes place around negotiations. Collaboration at the incident site was not only aquestion about boundary crossing; operational tasks may not always be aligned and have to be prioritized and sequenced. The exercises comprised work situations in which no single motive could explain or determine the collaboration,due to different types of expertise, primary responsibilities and needs forinformation. These factors were understood in terms of the concepts of boundarywork and boundary awareness. These concepts point at a more divergent understanding of collaboration that reaches beyond striving to create mutual understanding between organizations in learning activities. Differences between organizations, such as in terminology, time horizons, priorities, leadership structures, understandings of safety and how intra-organizational decisions and actions could impact the collaborating organizations' work, were central triggers for discussion and negotiation. These differences required explanations in order to make the actions and decisions of one organization understandable and justifiable to another, based on organizational mandates and types of expertise.Giving emergency services the opportunity to work together, to develop an awareness of their expectations of each other in various situations, to use and interpret their own and others' terminologies, and to identify internal hierarchies and motives for prioritizations was essential dimensions of exercises