Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2006. / Includes bibliographical references (leaves 209-213). / In this thesis, an innovative architecture for real-time adaptive and cooperative control of autonomous sensor platforms in a marine sensor network is described in the context of the autonomous oceanographic network scenario. This architecture has three major components, an intelligent, logical sensor that provides high-level environmental state information to a behavior-based autonomous vehicle control system, a new approach to behavior-based control of autonomous vehicles using multiple objective functions that allows reactive control in complex environments with multiple constraints, and an approach to cooperative robotics that is a hybrid between the swarm cooperation and intentional cooperation approaches. The mobility of the sensor platforms is a key advantage of this strategy, allowing dynamic optimization of the sensor locations with respect to the classification or localization of a process of interest including processes which can be time varying, not spatially isotropic and for which action is required in real-time. Experimental results are presented for a 2-D target tracking application in which fully autonomous surface craft using simulated bearing sensors acquire and track a moving target in open water. / (cont.) In the first example, a single sensor vehicle adaptively tracks a target while simultaneously relaying the estimated track to a second vehicle acting as a classification platform. In the second example, two spatially distributed sensor vehicles adaptively track a moving target by fusing their sensor information to form a single target track estimate. In both cases the goal is to adapt the platform motion to minimize the uncertainty of the target track parameter estimates. The link between the sensor platform motion and the target track estimate uncertainty is fully derived and this information is used to develop the behaviors for the sensor platform control system. The experimental results clearly illustrate the significant processing gain that spatially distributed sensors can achieve over a single sensor when observing a dynamic phenomenon as well as the viability of behavior-based control for dealing with uncertainty in complex situations in marine sensor networks. / by Donald Patrick Eickstedt. / Ph.D.

Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and, the Woods Hole Oceanographic Institution), 2004. / Includes bibliographical references. / This study is a geochemical investigation into the accretion of lower oceanic crust and processes of shallow melt-rock reaction at mid-ocean ridges. Major-, trace-elements, and isotopes from whole-rocks and minerals from the Lyngen Gabbro, a 480-My old dismembered ophiolite from the Scandinavian Caledonides, indicate that this igneous complex was produced from hydrous supra-subduction zone magmas, a remnant of an incipient ocean-arc. Such ophiolites are better models for the structural evolution than the geochemical evolution of the lower oceanic crust at mid-ocean ridges. Minerals in gabbros from Atlantis Bank, Southwest Indian Ridge, a modern, in-situ example of lower ocean-crust, were analyzed for major and trace-elements. The MELTS algorithm indicates that these gabbros formed by near-fractional crystallization at mid-crustal pressures. The gabbroic crust is more evolved than the lavas and represents melts fractionated 50-95% relative to a mantle-derived melt-composition, supported by trace-element models. This argues against the often-cited gabbro-glacier accretion model, where mantle-derived melts are transported to a shallow melt-lens and fractionates there before eruption. There remain >770-m of additional primitive cumulates below 1500-m deep Hole 735B or within the underlying mantle. Thus, the seismic Moho, beneath Hole 735B, could be the crust-mantle boundary, rather than an alteration front as suggested elsewhere. The Atlantis Bank gabbros have augites that are more primitive than plagioclases and olivines with which they coexist. Melt-rock interaction, where ascending melts dissolve the pre-existing gabbroic rocks and create hybrid magma may have caused this. Dissolution-experiments for plagioclase-olivine and plagioclase-augite mineral pairs / (cont.) were performed at 1180⁰-1330⁰C and 20-min - 24hrs. Dissolution occurs rapidly and out of equilibrium, with the dissolution rates dependent on the [delta]T above the solidus. Rocks with small grain-boundary areas (coarse grained or nearly mono-mineralic) heat internally when enclosed in hot magma, causing xenoliths or wall-rock to melt and disaggregate. The dissolution-derived magma crystallizes minerals more refractory-looking than the melts that precipitated the original gabbroic rocks. Assimilation of gabbroic rocks increases the Na content and decreases the Fe content of the melt that digests it, thus basaltic glasses formed after this hybridization will falsely reflect a lower degree and pressure of mantle melting. / by Astri Jæger Sweetman Kvassnes. / Ph.D.

Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2006. / Includes bibliographical references (p. 155-169). / Hurricanes, powerful storms with wind speeds that can exceed 80 m/s, are one of the most destructive natural disasters known to man. While current satellite technology has made it possible to effectively detect and track hurricanes, expensive 'hurricane-hunting' aircraft are required to accurately classify their destructive power. Here we show that passive undersea acoustic techniques may provide a promising tool for accurately quantifying the destructive power of a hurricane and so may provide a safe and inexpensive alternative to aircraft-based techniques. It is well known that the crashing of wind-driven waves generates underwater noise in the 10 Hz to 10 kHz range. Theoretical and empirical evidence are combined to show that underwater acoustic sensing techniques may be valuable for measuring the wind speed and determining the destructive power of a hurricane. This is done by first developing a model for the acoustic intensity and mutual intensity in an ocean waveguide due to a hurricane and then determining the relationship between local wind speed and underwater acoustic intensity. / (cont.) Acoustic measurements of the underwater noise generated by hurricane Gert are correlated with meteorological data from reconnaissance aircraft and satellites to show that underwater noise intensity between 10 and 50 Hz is approximately proportional to the cube of the local wind speed. From this it is shown that it should be feasible to accurately measure the local wind speed and quantify the destructive power of a hurricane if its eye wall passes directly over a single underwater acoustic sensor. The potential advantages and disadvantages of the proposed acoustic method are weighed against those of currently employed techniques. It has also long been known that hurricanes generate microseisms in the 0.1 to 0.6 Hz frequency range through the non-linear interaction of ocean surface waves. Here we model microseisms generated by the spatially inhomogeneous waves of a hurricane with the non-linear wave equation where a second-order acoustic field is created by first-order ocean surface wave motion. We account for the propagation of microseismic noise through range-dependent waveguide environments from the deep ocean to a receiver on land. We compare estimates based on the ocean surface wave field measured in hurricane Bonnie with seismic measurements from Florida. / by Joshua David Wilson. / Ph.D.

Thesis (Ph. D.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2006. / Includes bibliographical references (leaves 155-173). / A fundamental problem in limnology and oceanography is the inability to quickly identify and map distributions of plankton. This thesis addresses the problem by applying statistical machine learning to video images collected by an optical sampler, the Video Plankton Recorder (VPR). The research is focused on development of a real-time automatic plankton recognition system to estimate plankton abundance. The system includes four major components: pattern representation/feature measurement, feature extraction/selection, classification, and abundance estimation. After an extensive study on a traditional learning vector quantization (LVQ) neural network (NN) classifier built on shape-based features and different pattern representation methods, I developed a classification system combined multi-scale cooccurrence matrices feature with support vector machine classifier. This new method outperforms the traditional shape-based-NN classifier method by 12% in classification accuracy. Subsequent plankton abundance estimates are improved in the regions of low relative abundance by more than 50%. Both the NN and SVM classifiers have no rejection metrics. In this thesis, two rejection metrics were developed. / (cont.) One was based on the Euclidean distance in the feature space for NN classifier. The other used dual classifier (NN and SVM) voting as output. Using the dual-classification method alone yields almost as good abundance estimation as human labeling on a test-bed of real world data. However, the distance rejection metric for NN classifier might be more useful when the training samples are not "good" ie, representative of the field data. In summary, this thesis advances the current state-of-the-art plankton recognition system by demonstrating multi-scale texture-based features are more suitable for classifying field-collected images. The system was verified on a very large real-world dataset in systematic way for the first time. The accomplishments include developing a multi-scale occurrence matrices and support vector machine system, a dual-classification system, automatic correction in abundance estimation, and ability to get accurate abundance estimation from real-time automatic classification. The methods developed are generic and are likely to work on range of other image classification applications. / by Qiao Hu. / Ph.D.

Thesis (S.M.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2007. / Includes bibliographical references (p. 73-76). / In order to overcome the challenges that an anisotropic noise field poses for underwater target tracking, we conduct an onboard estimation of the horizontal noise directionality in the real-time processing suite of an autonomous underwater vehicle (AUV) towing a horizontal line array. The estimation of the noise directionality is a precursor to another adaptive behavior: optimizing tracking capability of a towed array by choosing a particular heading that minimizes the detection level in the target's direction. In each distinct simulated anisotropic noise field, the AUV successfully calculates the optimal towed array headings based on the real-time estimation of the horizontal noise directionality. The findings reveal a clear advantage over the conventional broadside beam tracking method, with some limitations due predominantly to the noise field itself. / by Maria Alejandra Parra-Orlandoni. / S.M.

Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, and the Woods Hole Oceanographic Institution), 2003. / Includes bibliographical references. / The presence of aqueous organic compounds derived from sedimentary organic matter has the potential to influence a range of chemical processes in hydrothermal vent environments. For example, hydrothermal alteration experiments indicate that alteration of organic-rich sediments leads to up to an order of magnitude more metals in solution than alteration of organic-poor basalt. This result is in contrast to traditional models for the evolution of vent fluids at sediment-covered mid-ocean ridge axis environments, and indicates the fundamental importance of including the effects of organic compounds in models of crustal alteration processes. However, in order to rigorously constrain their role in crustal alteration processes, quantitative information on the abundances and distributions of organic compounds in hydrothermal vent fluids is required. This thesis was undertaken to provide quantitative information on the distributions and stable carbon isotopic compositions of several low-molecular weight organic compounds (C1-C4 alkanes, C2-C3 alkenes, benzene and toluene) in fluids collected in July, 2000, at three sites on the northern Juan de Fuca Ridge: the Dead Dog and ODP Mound fields, which are located at Middle Valley, and the Main Endeavour Field, located on the Endeavour segment. At Middle Valley, the ridge axis is covered by up to 1.5 km of hemipelagic sediment containing up to 0.5 wt. % organic carbon. The Main Endeavour Field (MEF) is located approximately 70 km south of Middle Valley in a sediment-free ridge-crest environment, but previously measured high concentrations of NH3 and isotopically light CH4 relative to other bare-rock sites suggest that the chemical composition of these fluids is affected by sub-seafloor alteration of sedimentary material (LILLEY et al., 1993). / (cont.) Differences in the absolute and relative concentrations of NH3 and organic compounds and the stable carbon isotopic compositions of the C1-C3 organic compounds suggest that the three fields represent a continuum in terms of the extent of secondary alteration of the aqueous organic compounds, with the Dead Dog fluids the least altered, the MEF fluids the most altered and ODP Mound fluids in an intermediate state. At the two Middle Valley sites, the greater extent of alteration in the ODP Mound fluids as compared to the Dead Dog fluids is due either to higher temperatures in the subsurface reaction zone, or a greater residence time of the fluids at high temperatures. Higher reaction zone temperatures at the ODP Mound field than at the Dead Dog field are consistent with differences in endmember Cl concentrations between the two fields. The greater extent of alteration in the MEF fluids is caused by relatively oxidizing conditions in the subsurface reaction zone that promote faster reaction kinetics. Temperatures in the subsurface reaction zones calculated by assuming equilibrium among aqueous alkanes, alkenes and hydrogen are ... / by Anna M. Cruse. / Ph.D.

Syftet med studien är att undersöka hur behandlingspersonal på SiS-institutioner uppfattarvillkoren för att behandla tvångsomhändertagna ungdomar med psykiatriska tillstånd. Enskilda intervjuer med behandlingspersonal från SiS-institutioner har genomförts. Begreppen habitualisering och typifiering användes för vidare analys av resultatet tillsammans med olika förhållningssätt gentemot ungdomarna utifrån personaltyperna informella supporters, administratörer och vårdgivare. Resultatet påvisade att en majoritet av ungdomarna på SiS-institution har psykiatriska tillstånd. Behandlingspersonalen ska behandla psykosociala problem, men det framkommer att de även behöver hantera ungdomarnas psykiatriska vårdbehov trots bristande kompetens. De möjligheter och hinder som framkommit är ofta sammanvävdamed varandra men de aspekterna av vikt är behandlingsmetoder, formell och personlig kompetens samt personalens förhållningssätt gentemot ungdomarna. Även organisatoriska faktorer har framkommit ha en påverkan på behandlingsarbetet. Studien visar att felaktig behandling kan förlänga ungdomarnas sjukdomsförlopp. Vi anser därför att behandlingssituationen för placerade ungdomar med psykiatriska tillstånd behöver förbättras. / The study aims to explore how treatment staff at SiS-institutions perceive the conditions for treating youths with psychiatric conditions in compulsory care. Interviews were conducted with staff from SiS institutions. The concepts habitualization and typification are used for analysis of the results along with different approaches towards the youth based on the staff types informal supporters, administrators and caregivers. The results indicate that the majority of youths at SiS-institutions have psychiatric conditions. While the staff's primary focus is on treating psychosocial issues, it became evident that they handle the youths' psychiatric needs despite lacking competence. Identified possibilities and challenges are intertwined, emphasizing the importance of treatment methods, formal and personal competence, and the staff's approach. Organizational factors are found to influence treatment outcomes. The study shows that incorrect treatment can prolong the youths' illness. Therefore, we believe that the treatment situation for youths with psychiatric conditions needs improvement.

Text in German / This thesis takes as a starting point the societal change in Germany with its concomitant economic risks for substantial parts of the population. Evangelical churches in Germany have yet to react to this change. While the relationship between social work and mission has been a point of widespread discussion within the evangelical movement internationally, it fails to have any impact on local churches. The question is thus: how can a mission-oriented church benefit from Christian social reform movements? Transformative as well as holistic understandings of mission have already yielded an enlarged vision of mission as encompassing social justice. But how about a missiological paradigm which is practically translatable into cultural and social relevance as far as the local church’s vision for becoming an agent of societal change/reform is concerned? When interpreted missiologically, mediation can be such a useful paradigm, as its essence is conflict as a constant anthropological signifier of human/divine distance on the one side and God’s purpose of redemption as reflected in the church’s mission on the other. Thus mediation could be called a category of the missio dei. This practical implementation into the church’s work as being relevant for its community is reached by reverting to the sciences of social work, namely the concept of community development. As mediative community work, this approach will add to the profile of a mission-oriented church as determined to serve a holistic vision of the gospel. At the focus is thus the immediate social environment of a local church, in which it can trigger spiritual, personal, social, cultural and economic processes of transformation. In the social context of Germany this way of expressing the missiological drive of a local church seems to be a hopeful avenue, since the social and economic risks are likely to remain and are threatening a large percentage of the population with social marginalisation. It is here that the economy of community work will be furnishing useful aspects to help a mission-oriented church develop its mediative-communal thrust into its immediate social context in order to proclaim God’s redemptive purpose. / Ausgangspunkt dieser Arbeit ist die Beobachtung des gesellschaftlichen Wandels in der Bundesrepublik Deutschland samt seiner sozialen und ökonomischen Risiken für weite Teile der Bevölkerung. Eine Antwort auf diesen Transformationsprozess ist seitens der evangelikalen Kirchen in Deutschland ausgeblieben. Die Frage nach der Verhältnisbestimmung zwischen sozialer Arbeit und Mission ist in der evangelikalen Bewegung zwar international breit diskutiert worden, doch hat sie kaum Wirkung auf die Praxis der örtlichen Gemeinden in Deutschland gezeigt. Bearbeitet wird daher die Fragestellung, wie eine missionarisch orientierte Gemeinde in ihrem Sendungsauftrag Initiativen christlicher Sozialreformen umsetzen kann. Transformative und ganzheitliche Missionskonzepte haben bereits ein erweitertes Missionsverständnis hervorgebracht, welches die soziale Gerechtigkeit als missionarischen Auftrag mit einschließt. Die Frage stellt sich nun nach einem missionstheologischen Paradigma, welches praktisch in eine kultur- und gesellschaftsrelevante Tätigkeit einer missionalen Gemeinde umgesetzt werden kann, durch die sie zu einem Träger einer christlich geprägten Sozialreform wird. Das Paradigma, das hierfür erarbeitet und missionstheologisch gedeutet wird, ist das der Mediation. Sie offenbart in ihrem Wesen zum einen den Konflikt als anthropologische Konstante und somit die Distanz zu Gott und zum anderen die Heilsabsicht Gottes, die sich im Missionsauftrag an die Gemeinde widerspiegelt. So stellt sich die Mediation als Kategorie der missio dei dar. Die konkrete Umsetzung dieses Paradigmas in eine die Gesellschaft gestaltende Arbeit gelingt durch die Hinzuziehung des Arbeitsprinzips der Gemeinwesenarbeit aus der Sozialarbeitswissenschaft. In Form einer mediativ-gemeinwesenorientierten Arbeit gibt sie einer missional ausgerichteten Gemeinde die Möglichkeit ihren Sendungsauftrag mit einem umfassenden Heilsverständnis umzusetzen. Dabei steht der unmittelbare Sozialraum der lokalen Kirchengemeinde im Fokus des Interesses, in dem geistliche, persönliche, soziale kulturelle und ökonomische transformative Prozesse eingeleitet werden können. Bezugnehmend auf den Kontext der Bundesrepublik Deutschland erweist sich diese Art den Sendungsauftrag umzusetzen als hoffnungsträchtig, da die sozialen und ökonomischen Risiken in Zukunft weiter bestehen werden und ein nicht unerheblicher Teil der Bevölkerung bereits als sozial ausgegrenzt ist. Hier gibt insbesondere die Gemeinwesenökonomie Anhaltspunkte, wie eine mediativ-gemeinwesenorientierte missionale Gemeinde in ihrem Sozialraum den Heilswillen Gottes verkündigen kann. / Christian Spirituality,Church History and Missiology / D. Th. (Missiology)

我國都市土地採用土地使用分區管制制度，然而於此制度下，卻出現許多違規使用情形。而違規使用將可能破壞土地使用分區管制對社會財產權之配置，故考量整體社會福利，違規使用之問題實有必要妥善處理。 但面對違規使用，過去文獻與實務多就問題直接提出解決方式，而未討論問題肇因於制度的哪一個階段、或是制度階段之間是否存在矛盾，才進而導致違規使用，如此之解決方式將可能無法有效對症下藥，甚至產生新的問題。 又，隨著都市人口增加、商業活動趨於頻繁，住宅與商業使用在有限的土地競爭下，住宅區與商業區土地違規使用問題趨於明顯，有其必要加以重視。 因此，本研究利用住商違規使用代表個案—住宅區作不當商業違規使用之師大商圈，以及特定商業區作住宅違規使用之基隆河截彎取直地區，運用文獻歸納法，以及制度經濟之制度層次理論為基礎，將案例問題分為三階段，包含(1)制度制定：政府有限理性與機會主義之公共選擇問題、(2)制度本身：不完全制度之闕漏、(3)制度執行：政府內部與對外資訊不對稱、目標不一致之代理問題，將案例就各階段進行分析，找出問題根源；在釐清違規使用問題根源後，利用文獻之歸納找出可能解決方式，並對過去提出解決方式之應用限制加以改善，嘗試研擬個案問題之對策，並對類似之通案建立完整策略。 本研究分析結果發現 (1)師大商圈：制度本身、制度執行存在問題，而本研究針對制度本身問題提出重疊分區管制與投票式分區管制互相配合加以解決；至於制度執行問題短期應對地方政府給予監督及誘因，並可建立民眾檢舉違規使用資訊揭露之平台，改善制度環境，長期則應從改革政治機制做起。(2)基隆河截彎取直地區：制度制定、制度本身、制度執行三階段皆存在問題；由於制度制定問題既已產生，則短期內應從制度本身與制度制定階段改善，彌補制度制定之缺陷；至於制度本身問題，當前作法可採用浮動式規劃允許修改制度之限制；制度執行問題解決方式則同師大商圈。此外，本研究亦利用上述案例結果對未來通案建立完整解決對策，而本研究發現，在擬定完整對策前，必須先釐清制度之立法本意(即初始財產權賦予對象)，才能擬定一套完整對策，令不同階段制度之解決對策在應用上能相互串連、呼應。 本研究冀利用制度階段分析與解決對策之整合，嘗試建構住商違規使用問題之完整對策，以期未來能預防違規使用問題產生，或於問題產生時能有效處理，減少違規使用對財產權之損害。 / The land institution of urban land in Taiwan is “Zoning”. Even with the strict rules of zoning to control land use, there are still a lot of illegal land use cases. These illegal land uses may break the arrangements of social property rights and the entire social welfare. While most of the studies focus on finding the solution to the illegal land use problems, the causes of those problems are rarely discussed., which may not solve the illegal land use problems efficiently, or lead to more problems. Also, due to the increase of population in the cities and the business activities in the limited land, the illegal land use problems between housing and business land become more serious and need more attention. This research analyzes typical cases of illegal land use between housing and business in Taiwan. One of the cases is “Shida Business District”, where the business activities over used the land in the mixed residential commercial district. The other case is “Kee-Lung River Short Cut District”, which is low used as housing in the special business district. The research method is literature induction. On the basis of Institutional Economics (IE), this research divides the illegal land use problems into three levels: the institution making, the institution, and the institution performing. This research tries to analyze each level, find the source of the problems, and improve the restriction of past proposed solutions as well as build comprehensive strategies to these typical type cases. The results of the research show in the case of “Shida Business District”, the reasons of illegal land use problems exist in the level of the institution making and institution. The overlying zone and voting zone can solve the problems in the level of the institution making. The public oversight and intensive are the strategies to the institution performing problems in the short term. But in the long run, the political system needs improving. In the case of “Kee-Lung River Short Cut District”, the reasons of illegal land use problems exist in all three levels. In the short term, the institution correction by floating zone can modify the institution making and the institution problems. The solution of the institution performing problems is the same with the case of “Shida Business District”. Moreover, the analysis process of this research indicates that, before making any strategy, the most important thing is to clarify the original intention of the institution. It will be used to decide that who should won the initial property rights and develop complete strategies. This research analyzes the institution levels and integrates the solutions of illegal land use between housing and business to develop the strategies. We hope that in the future, this research can prevent the causes of illegal land use, or deal with illegal land use problems effectively to cut down the damages of property rights.

The Paris Principles, a UN document adopted in 1993, requires that states establish NationalHuman Rights Institutions [cit. NHRI] for the protection and promotion of human rights. AlthoughSweden was one of the countries that promoted the adoption of the Paris Principlesinternationally, on a national level there is a still ongoing debate on the necessity of such aninstitution. This paper aims to present arguments for and against the establishment of a NHRIin Sweden in accordance with the binding and additional provisions of the Paris Principles.The Swedish system for promotion and protection of human rights is discussed in this paper,including the issue of access to justice.The main purpose of the paper is to draw conclusions as to how the legal norms shouldbe formed. Primary sources being used are therefore legal literature (both Swedish and foreign)and Swedish preparatory works. The paper contains a comparative section where thecomparative method is used.The paper concludes that Sweden is in need of a NHRI established in accordance withthe binding provisions of the Paris Principles. In addition, in order to promote individuals’access to justice the additional principles should be implemented as well. Since there is arange of obstacles for that, both practical and constitutional, the author of the paper goes on todiscuss how the protection of human rights in Sweden can be reinforced in other ways.