Den globala “miljökrisen” är ett frekvent ämne som genomsyrat världsdebatten under senare år. Koldioxidutsläppen ökar, samtidigt som jordens begränsade reserver töms i allt större utsträckning. Klimatförändringar är ett fenomen som står oss nära och som påverkar oss individer starkt. Under rådande pandemi (Covid19) kan man se resultatet av hur klimatförstöring påverkat vår planet, vilket till stor del beror att den miljöförstörande industrin står stilla. Covid19 pandemin visar verkligen hur relevant studien är och hur viktigt det är med miljöförbättringsåtgärder när det gäller framtida generationers överlevnad. Då kommuner, regioner och landet som stort tar sitt ansvar och arbetar aktivt mot de olika uppsatta miljömålen kan vi successivt minska på det globala avtrycket.  I detta arbete har kommunerna en framträdande roll, och ifall kommunen inte arbetar med ett aktivt klimatarbete kommer inte morgondagens miljökrav att uppnås. Uppsatsens syfte är att undersöka hur miljöarbetet i två närliggande kommuner med liknande stor areal och befolkning skiljer sig åt. Syftet är att se hur olika strategier påverkar kommunernas val av miljösatsningar inom dess fastighetsorganisation/fastighetsbestånd. Uppsatsen har utgått ifrån relevant teori, kurslitteratur, genomförda intervjuer med miljöstrateg och förvaltare i respektive kommun.  Resultatet visar att skillnaderna mellan kommunernas strategier och miljösatsningar är stora. Kommun 1 anställda saknade ett reviderat miljömålsprogram att sträva efter vilket resulterade i att kommunens miljöarbete stod stilla.  Trots de två respondenternas stora vilja till förändring inom området miljö, saknades detta i organisationen. Kommun 2 som bedrev sin förvaltning genom det allmännyttiga bolaget låg i framkant när det gäller dessföre i sitt miljöarbete. Dessutom hade bolaget blivit prisat för sitt miljöarbete då individerna i bolaget arbetade aktivt med miljösatsningar inom dess fastighetsbestånd. / The global “environmental crisis” is a frequent and highly discussed topic that has permeated the world debate in recent years. Carbon dioxide emissions are increasing, while the earth’s limited reserves are being increasingly depleted. Climate change is a phenomenon that is close to us and affects us on an individual level. During the current pandemic (Covid-19) climate destructive industries have shut-down, and now one can clearly see the result of climate change. Covid-19 truly shows how relevant this study is and how important it is with environmental improvement measures regarding future generations survival. In order to reduce our global imprint, municipalities, regions and the country as a whole needs to take responsibility and actively work towards achieving the set environmental goals. In this work, municipalities have a prominent role, and if the municipalities do not actively work with reducing our imprint, tomorrow's environmental requirements will not be met. The purpose of the thesis is to investigate how the environmental work in two neighbouring municipalities' with similar large area and population differ. The purpose is to see how different strategies affect the municipalities' choice of environmental initiatives within their property holdings. The results show major differences between the municipalities strategies and environmental initiatives. Municipality 1 lacked a revised environmental target program to strive for which resulted in the municipality's environmental work standing still. Despite the the two respondents' great desire to make a change in the environment, this was lacking in the organization.  Municipality 2, which carried out its management through the public utility company, was at the forefront of its environmental work. In addition, muncipality 2, had been praised for its environmental work as it actively worked with environmental investments in their property portfolio.

月あるいは火星近傍における持続可能な宇宙空間利用のために、月面および火星表層を覆う複合酸化物から成るレゴリスを資源としたその場資源利用に関する技術の発展が不可欠である。本研究では、不揮発不燃性の溶融塩を反応媒体に用い、電気化学プロセシングにより、その場資源であるレゴリスに含まれる有用な元素の分離・回収・利用する技術を新たに提案した。また、溶融ハライド塩中での各種金属元素やイオン及びその酸化物等の物理化学特性を明らかにした。 / High temperature molten salt plays a key role in power generation systems such as solar cells, nuclear fission reactor, and nuclear fusion reactor on the moon and Mars. In this thesis, the physicochemical phenomena of metallic atoms, metallic ions, and its oxides in molten halides were investigated in order to obtain fundamental knowledges for electrochemical/materials science and to develop electrochemical processing in molten salt for in-situ resource utilization. The significant effects of melt structure, melt composition, and interfacial flow phenomena on the Si electrodeposition process was discussed. The corrosion behavior of major alloys and a unique steel in molten halides was also discussed. / 博士(工学) / Doctor of Philosophy in Engineering / 同志社大学 / Doshisha University

Exploring the Solar System is an ongoing process of humanity that cannot be stopped. It requires large amounts of resources to explore space, which need to be acquired from somewhere. Resources mined on Earth cannot be diverted from vital productions on Earth as those required for energy systems transition and developing a sustainable society. With an ever-increasing demand of resources on Earth, resource extraction needs to be increased and diverted to avoid resource depletion. One such diversion is resource extraction from terrestrial bodies other than Earth, such as asteroids, meteorites, and the Moon. This thesis looks at the resources present on the Moon by compiling a chemical database which is then fed to mathematical models aimed to compare historical trends of Earth mining operations and prospected trends from lunar resources. Such approach is expected to establish if lunar mining is viable. The results are discussed in a larger context of how lunar resources can be used for in-situ resource utilization for solar system exploration, as well as questions regarding space law and possible colonialization.

As research continues for the habitation of the Lunar and Martian surfaces, the need for materials for construction of structural parts, mechanical components, and tools remains as a major milestone. The use of in-situ resource utilization (ISRU) techniques is critical due to the financial, physical, and logistical burdens of sending supplies beyond low-Earth orbit. The Bosch process is currently in development as a life support system at the National Aeronautics and Space Administration’s (NASA) Marshall Space Flight Center (MSFC) to regenerate oxygen (O2) from metabolic carbon dioxide (CO2) with the byproduct of elemental carbon (C). The Bosch process presents a possible way of regenerating O2 without the disposal of hydrogen (H2) like the Sabatier. Ionic liquids (ILs) are also studied at MSFC as a means to harvest metallic elements from regolith oxides and meteorites. IL technology provides an energy efficient method of extracting critical manufacturing materials, such as iron (Fe) that could be used for ferrous alloy production. This dissertation seeks to explore the use of Bosch C and IL-Fe for ferrous alloy production through a series of studies. These studies included individually using Bosch C with commercial elements to cast low carbon steel and gray cast iron, investigating as-produced IL-Fe in a laser-based powder bed fusion (PBF-LB) printer to determine IL-Fe metallurgical characteristics, using the IL-Fe composition to design a ductile iron (DI) alloy of similar performance to a commercially available DI alloy, and lastly, refining this DI alloy to produce a DI alloy more representative of an alloy producible from IL-Fe and Bosch byproduct C in a Martian environment. The results presented here suggest that with advances in production rate and control of IL-Fe oxidation, and by providing a sufficient energy grid to operate equipment, a range of high quality DI materials could be manufactured with IL and Bosch process ISRU feedstocks.

Server consolidation is currently widely employed in order to improve the energy efficiency of data centers. While being a promising technique, server consolidation may lead to resource interference between applications and thus, reduced performance of applications. Current approaches to account for possible resource interference are not well suited to respect the variation in the workloads for the applications. As a consequence, these approaches cannot prevent resource interference if workload for applications vary. It is assumed that having models for the resource utilization and power consumption of applications as functions of the workload to the applications can improve decision making and help to prevent resource interference in scenarios with varying workload. This thesis aims to develop such models for selected applications. To produce varying workload that resembles statistical properties of real-world workload a workload generator is developed in a first step. Usually, the measurement data for such models origins from different sensors and equipment, all producing data at different frequencies. In order to account for these different frequencies, in a second step this thesis particularly investigates the feasibility to employ quantile functions as model inputs. Complementary, since conventional goodness-of-fit tests are not appropriate for this approach, an alternative to assess the estimation error is presented. / Serverkonsolidierung wird derzeit weithin zur Verbesserung der Energieeffizienz von Rechenzentren eingesetzt. Während diese Technik vielversprechende Ergebnisse zeitigt, kann sie zu Ressourceninterferenz und somit zu verringerter Performanz von Anwendungen führen. Derzeitige Ansätze, um dieses Problem zu adressieren, sind nicht gut für Szenarien geeignet, in denen die Workload für die Anwendungen variiert. Als Konsequenz daraus folgt, dass diese Ansätze Ressourceninterferenz in solchen Szenarien nicht verhindern können. Es wird angenommen, dass Modelle für Anwendungen, die deren Ressourenauslastung und die Leistungsaufnahme als Funktion der Workload beschreiben, die Entscheidungsfindung bei der Konsolidierung verbessern und Ressourceninterferenz verhindern können. Diese Arbeit zielt darauf ab, solche Modelle für ausgewählte Anwendungen zu entwickeln. Um variierende Workload zu erzeugen, welche den statistischen Eigenschaften realer Workload folgt, wird zunächst ein Workload-Generator entwickelt. Gewöhnlicherweise stammen Messdaten für die Modelle aus verschienenen Sensoren und Messgeräten, welche jeweils mit unterschiedlichen Frequenzen Daten erzeugen. Um diesen verschiedenen Frequenzen Rechnung zu tragen, untersucht diese Arbeit insbesondere die Möglichkeit, Quantilfunktionen als Eingabeparameter für die Modelle zu verwenden. Da konventionelle Anpassungsgütetests bei diesem Ansatz ungeeignet sind, wird ergänzend eine Alternative vorgestellt, um den durch die Modellierung entstehenden Schätzfehler zu bemessen.

This dissertation details the design and development of a mobile autonomous platform from which to conduct a 3D ground-penetrating radar survey. The system uses a three-rover multiagent team to perform a site-selection activity during a lunar analog mission. The work took place beginning in 2008 and culminated in a final field test on Mauna Kea in Hawaii. This demonstration of autonomous acquisition of 3D ground-penetrating radar in a space robtic application is promising not only for in-situ resource utilization, but also for the concept of multiagent teaming.

This dissertation details the design and development of a mobile autonomous platform from which to conduct a 3D ground-penetrating radar survey. The system uses a three-rover multiagent team to perform a site-selection activity during a lunar analog mission. The work took place beginning in 2008 and culminated in a final field test on Mauna Kea in Hawaii. This demonstration of autonomous acquisition of 3D ground-penetrating radar in a space robtic application is promising not only for in-situ resource utilization, but also for the concept of multiagent teaming.

農林水産研究情報センターで作成したPDFファイルを使用している。

The goals of this study were to use Geographic Information Systems (GIS) and remote sensing technologies to gain a better understanding of habitat requirements of a population of ocelots in south Texas, and then apply this knowledge to form a predictive model to locate areas of suitable habitat in Willacy and Cameron counties, Texas. Satellite imagery from August 1991 and August 2000 were classified into four land cover types: closed canopy, open canopy, water, and urban/barren. These classified images were converted into digital thematic maps for use in resource utilization studies and modeling. Location estimates (762 from 1991 and 406 from 2000) were entered into a GIS in order to extract information about home range and resource selection. Each animal's home range was calculated using both Minimum Convex Polygon (MCP) and Kernel home range estimators (95% and 50%). Habitat parameters of interest were: soil, land cover, human density, road density, and distance to closest road, city and water body. Ocelots were found to prefer closed canopy and avoid open canopy land cover types. Ocelots preferred soils known to support thorn scrub, an indication of the importance of this habitat. Landscape metrics associated with habitat used by ocelots were determined through the use of Patch Analyst, an extension for ArcView 3.2. Contrary to expectations, ocelots utilized areas with greater fragmentation than random areas available for use. However, this use of highly fragmented areas was an indication of the degree of fragmentation of suitable habitat in the area. Further investigation of patch size selection indicated that ocelots used large sized patches disproportionately to availability, indicating a preference for larger patches. A model was created using the resource selection and habitat preference GIS database from 1991. This model was used to identify areas of “optimal”, ”sub-optimal”, and “unsuitable” habitat for ocelots in 2000. This resultant map was compared to known locations of ocelots in 2000. Ocelots were found to prefer optimal habitat and avoid unsuitable habitat, an indication that the model created was valid.

<p> Inclement challenges of a changing climate and humanity's desire to explore extraterrestrial environments both necessitate efficient methods to obtain freshwater. To accommodate next generation water technology, there is a need for understanding and defining the energy efficiency for unconventional water sources over a broad range of environments. Exergy analysis provides a common description for efficiency that may be used to evaluate technologies and water sources for energy feasibility. This work uses robust thermodynamic theory coupled with atmospheric and planetary data to define water capture efficiency, explore its variation across climate conditions, and identify technological niches and development needs.  </p> <p><br></p> <p> We find that desalinating saline liquid brines, even when highly saline, could be the most energetically favorable option for obtaining water outside of Earth. The energy required to access water vapor may be four to ten times higher than accessing ice deposits, however it offers the capacity for decentralized systems. Considering atmospheric water vapor harvesting on Earth, we find that the thermodynamic minimum is anywhere from 0x (RH≥ 100%) to upwards of 250x (RH<10\%) the minimum energy requirement of seawater desalination. Sorbents, modelled as metal organic frameworks (MOFs), have a particular niche in arid and semi-arid regions (20-30%). Membrane-systems are best at low relative humidity and the region of applicability is strongly affected by the vacuum pumping efficiency. Dew harvesting is best at higher humidity and fog harvesting is optimal when super-saturated conditions exist. Component (e.g., pump, chiller, etc.) inefficiencies are the largest barrier in increasing process-level efficiency and strongly impact the regions optimal technology deployment. The analysis elucidates a fundamental basis for comparing water systems energy efficiency for outer space applications and provides the first thermodynamics-based comparison of classes of atmospheric water harvesting technologies on Earth.</p>