Дисертації з теми "Environmental management not elsewhere classified"
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(9875528), DP Irwin. "Evaluation of water quality monitoring networks using the concept of information entropy." Thesis, 1996. https://figshare.com/articles/thesis/Evaluation_of_water_quality_monitoring_networks_using_the_concept_of_information_entropy/13425992.
Повний текст джерела(12608132), Roslyn Howse. "Biological impacts of acid mine drainage in the Dee River, downstream of the Mt Morgan Mine, Central Queensland, Australia." Thesis, 2003. https://figshare.com/articles/thesis/Biological_impacts_of_acid_mine_drainage_in_the_Dee_River_downstream_of_the_Mt_Morgan_Mine_Central_Queensland_Australia/19836388.
Повний текст джерелаMining for gold and copper was undertaken for nearly 100 years from 1882 at Mount Morgan in Central Queensland. Re -processing of. tailings ceased in the early 1990s and no
mining has been conducted since. The legacy of the historical mining practices is an open cut (threatening to overflow) and acid mine drainage (AMD) extending for a considerable distance along the -Dee River.
The first -18 km- of the river downstream- of- the mine, to its junction with Fletcher Creek, is severely impacted with pH consistently below 3.5. Water metal concentrations are many times higher than the water quality standards for freshwater biota. For example, the filtered mean concentrations of Al and Cu at 4 sites in this section of the river were 87.3 and 6.45 mg/L, respectively. Fish, molluscs and shrimp were absent and macroinvertebrate species richness was limited to only insects in this severely impacted region. Water quality of the river improves at the junction with Fletcher Creek and downstream the water quality is only severely impacted during periods of flow following rain events.
This study examined the biological impacts downstream of the mine including the response of biota to flows in the river. Whilst previous studies had investigated spatial variations in macroinvertebrate communities this study also examined temporal variation and response to flow. The metal content of fish and mussels from the river were determined for the first time.
(10695907), Wo Jae Lee. "AI-DRIVEN PREDICTIVE WELLNESS OF MECHANICAL SYSTEMS: ASSESSMENT OF TECHNICAL, ENVIRONMENTAL, AND ECONOMIC PERFORMANCE." Thesis, 2021.
Знайти повний текст джерелаOne way to reduce the lifecycle cost and environmental impact of a product in a circular economy is to extend its lifespan by either creating longer-lasting products or managing the product properly during its use stage. Life extension of a product is envisioned to help better utilize raw materials efficiently and slow the rate of resource depletion. In the case of manufacturing equipment (e.g., an electric motor on a machine tool), securing reliable service life as well as the life extension are important for consistent production and operational excellence in a factory. However, manufacturing equipment is often utilized without a planned maintenance approach. Such a strategy frequently results in unplanned downtime, owing to unexpected failures. Scheduled maintenance replaces components frequently to avoid unexpected equipment stoppages, but increases the time associated with machine non-operation and maintenance cost.
Recently, the emergence of Industry 4.0 and smart systems is leading to increasing attention to predictive maintenance (PdM) strategies that can decrease the cost of downtime and increase the availability (utilization rate) of manufacturing equipment. PdM also has the potential to foster sustainable practices in manufacturing by maximizing the useful lives of components. In addition, advances in sensor technology (e.g., lower fabrication cost) enable greater use of sensors in a factory, which in turn is producing greater and more diverse sets of data. Widespread use of wireless sensor networks (WSNs) and plug-and-play interfaces for the data collection on product/equipment states are allowing predictive maintenance on a much greater scale. Through advances in computing, big data analysis is faster/improved and has allowed maintenance to transition from run-to-failure to statistical inference-based or machine learning prediction methods.
Moreover, maintenance practice in a factory is evolving from equipment “health management” to equipment “wellness” by establishing an integrated and collaborative manufacturing system that responds in real-time to changing conditions in a factory. The equipment wellness is an active process of becoming aware of the health condition and of making choices that achieve the full potential of the equipment. In order to enable this, a large amount of machine condition data obtained from sensors needs to be analyzed to diagnose the current health condition and predict future behavior (e.g., remaining useful life). If a fault is detected during this diagnosis, a root cause of a fault must be identified to extend equipment life and prevent problem reoccurrence.
However, it is challenging to build a model capturing a relationship between multi-sensor signals and mechanical failures, considering the dynamic manufacturing environment and the complex mechanical system in equipment. Another key challenge is to obtain usable machine condition data to validate a method.
A goal of the proposed work is to develop a systematic tool for maintenance in manufacturing plants using emerging technologies (e.g., AI, Smart Sensor, and IoT). The proposed method will facilitate decision-making that supports equipment maintenance by rapidly detecting a worn component and estimating remaining useful life. In order to diagnose and prognose a health condition of equipment, several data-driven models that describe the relationships between proxy measures (i.e., sensor signals) and machine health conditions are developed and validated through the experiment for several different manufacturing-oriented cases (e.g., cutting tool, gear, and bearing). To enhance the robustness and the prediction capability of the data-driven models, signal processing is conducted to preprocess the raw signals using domain knowledge. Through this process, useful features from the large dataset are extracted and selected, thus increasing computational efficiency in model training. To make a decision using the processed signals, a customized deep learning architecture for each case is designed to effectively and efficiently learn the relationship between the processed signals and the model’s outputs (e.g., health indicators). Ultimately, the method developed through this research helps to avoid catastrophic mechanical failures, products with unacceptable quality, defective products in the manufacturing process as well as to extend equipment service life.
To summarize, in this dissertation, the assessment of technical, environmental and economic performance of the AI-driven method for the wellness of mechanical systems is conducted. The proposed methods are applied to (1) quantify the level of tool wear in a machining process, (2) detect different faults from a power transmission mini-motor testbed (CNN), (3) detect a fault in a motor operated under various rotation speeds, and (4) to predict the time to failure of rotating machinery. Also, the effectiveness of maintenance in the use stage is examined from an environmental and economic perspective using a power efficiency loss as a metric for decision making between repair and replacement.
(9823415), Darryl O'Brien. "Re-evaluation of the existing change management models to improve the response of the Building Code of Australia to environmental docility." Thesis, 2016. https://figshare.com/articles/thesis/Re-evaluation_of_the_existing_change_management_models_to_improve_the_response_of_the_Building_Code_of_Australia_to_environmental_docility/13387187.
Повний текст джерелаHarris, Howard. "An account of courage in management decision making." 1999. http://arrow.unisa.edu.au:8081/1959.8/28298.
Повний текст джерела(11176893), Toy W. Andrews. "Opportunities from Disaster: The Case for Using The Circular Economy in Debris Management." Thesis, 2021.
Знайти повний текст джерела(9830960), Brett Roe. "Ecologically engineered primary production in Central Queensland, Australia: Integrated fish and crayfish culture, constructed wetlands, floral hydorponics, and industrial wastewater." Thesis, 2005. https://figshare.com/articles/thesis/Ecologically_engineered_primary_production_in_Central_Queensland_Australia_Integrated_fish_and_crayfish_culture_constructed_wetlands_floral_hydorponics_and_industrial_wastewater/13420664.
Повний текст джерела(6564809), Elisabeth Krueger. "Dynamics of Coupled Natural-Human-Engineered Systems: An Urban Water Perspective on the Sustainable Management of Security and Resilience." Thesis, 2019.
Знайти повний текст джерелаSung, Ching Ing. "Managerial characteristics and business strategy as determinants of business performance as moderated by business environment of Chinese SMEs in the State of Sarawak, East Malaysia." 2006. http://arrow.unisa.edu.au:8081/1959.8/48659.
Повний текст джерелаThangavadivel, Kandasamy. "Development and application of ultrasound technology for treatment of organic pollutants." 2010. http://arrow.unisa.edu.au:8081/1959.8/93186.
Повний текст джерелаThesis (PhD)--University of South Australia, 2010
(5930588), Michael W. Coots. "LEARNING ENVIRONMENTS FOR STEM INTEGRATION." Thesis, 2021.
Знайти повний текст джерелаSTEM education has been a topic of reform in education for many years and it has recently focused primarily on the education methodology called STEM integration. Universities and state departments of education have defined teacher education programs and STEM initiatives that explore the necessary ingredients for a curriculum using this methodology, but they do not provide explicit instructions for the design of the learning environment. The purpose of this study was to explore the question "What are the characteristics of high school learning environments that support integrated STEM instruction?"
This qualitative study used a postpositive lens and multiple-case study framework to distill the experiences and evidence gathered from four STEM certified high schools in the state of Indiana. This distillation resulted in three universal themes common to each school which were: the allocation of universally accessible free space for STEM integration, the importance for mobility of resources and students, and the need for supportive technological resources.
This study is applicable to both those who are educators working in STEM education and those researchers looking to understand the STEM integration paradigm or learning environment design. Educators can use this study to plan their own learning environments and researchers can use this study as a pilot to many other outlets in the topic of STEM integration.
(14239390), Vaughan J. G. Higgins. "Smoothing the process of change? A genealogy of the governance of farm viability in Australia (1967-1997)." Thesis, 2000. https://figshare.com/articles/thesis/Smoothing_the_process_of_change_A_genealogy_of_the_governance_of_farm_viability_in_Australia_1967-1997_/21700763.
Повний текст джерелаThis thesis focuses on how, since the 1960s, farm viability in Australia has been constituted as a formal political problem by various authorities. It argues, in particular, that the 'problem' of farm viability has come to be based increasingly on the individual managerial capacities of farmers themselves. In the past thirty years, the issue of viability has been characterised by agricultural economists and governments alike as one of 'smoothing the process of change' whereby resources are re-distributed from farmers who are deemed to have little future in the industry, to the more economically 'viable' producers. This approach rests on the assumption that it is possible to define accurately viability - as the basis for eventual state action.
In contrast to this approach, the Foucauldian-inspired literature on governmentality points to the desirability of examining the contingent foundations upon which attempts to define, and govern, viable/unviable farmers are based. The thesis investigates the different ways in which farm viability has historically been governed as a knowable object, and the forms of conduct that this authorises. To do this, I reconstruct genealogically - commencing in the 1990s and working back to 1967 - the specific rationalities, technologies, and forms of expertise that have enabled farm viability to emerge as a governable problem, and to be assembled into a programmatic form. Policy documents, Acts of Parliament, parliamentary debates, agricultural economics literature, National Farmers' Federation publications, secondary data from a recent study on drought, and interviews with Federal and State public servants and farm organisation representatives are used as the basis for reconstructing how farm viability has been governed.
My thesis suggests that since the late 1980s, an 'advanced liberal' regime of governing has underpinned the governing of farm viability, with the adoption of formal business skills constituted as a means of providing farmers with the appropriate capacities to manage their properties. However, the governing of producers in this way has not always been seen as appropriate. The thesis examines how the constitution of viability has shifted since the late 1960s as part of attempts to define and redefine both 'normal' farms, and the capacities of farmers. This study concludes that the governing of farm viability is more complex than simply smoothing the process of change. Such change, and responses to it, are constituted and rendered knowable through a variety of rationalities and technologies of governing that attempt to shape the conduct of both authorities and farmers.
Kalaitzidis, Evdokia. "professional ethics for professional nursing." 2006. http://arrow.unisa.edu.au:8081/1959.8/30081.
Повний текст джерела(5929667), Julie A. Feldpausch. "Interactive Effects of Nutrition, Environment, and Processing on Fresh Pork Quality, Intestinal Biomarkers of Heat Stress in Swine, and Career Success Factors for Agricultural Students." Thesis, 2019.
Знайти повний текст джерела(9780230), Sharmina Begum. "Assessment of alternative waste technologies for energy recovery from solid waste in Australia." Thesis, 2016. https://figshare.com/articles/thesis/Assessment_of_alternative_waste_technologies_for_energy_recovery_from_solid_waste_in_Australia/13436876.
Повний текст джерела(11205324), Benjamin Joseph Rivera. "The Establishment, Control, and Post-Control Response of Amur Honeysuckle (Lonicera maackii)." Thesis, 2021.
Знайти повний текст джерелаAmur honeysuckle (Lonicera maackii) is a shrub endemic to East Asia which has become invasive and nearly ubiquitous to the forest ecosystems of eastern North America. Through its extended growing season, competitive ability, and potential allelopathy, Amur honeysuckle alters native herbaceous-layer plant communities and inhibits the regeneration of native tree species. As such, it is representative of a range of invasive shrub species imported from East Asia. My thesis contributes to questions fundamental to the understanding this and other invasive shrubs: 1) How do species become invasive? 2) How can the invasions of the species be effectively controlled? 3) How does the ecosystem respond to treatment of the invasive species?
First, I examined the role of self-compatibility within Amur honeysuckle. I compared the berry production, seed production, and germination rates between closed-pollinated and open-pollinated flowering branches of Amur honeysuckle individuals across multiple types of invasions (heavy, light, and sprouting). I found that Amur honeysuckle not only possesses the ability to self-pollinate, but that it can produce viable self-pollinated seed sets. This ability may help explain how Amur honeysuckle able to invade isolated forest patches far removed from the main invasion.
Second, I evaluated the effectiveness of a novel herbicide adjuvant in reducing the amount of herbicide needed in the ‘cut-stump’ method of controlling Amur honeysuckle. Combining various concentrations of the most common herbicide in the world, glyphosate, with concentrations of cellulases derived from fungi, 2XL, I examined whether the cellulases improved the effectiveness of glyphosate, potentially by increasing glyphosate movement into the vascular tissue of Amur honeysuckle through the degradation of cell walls. While 2XL was not an effective adjuvant, glyphosate concentrations of less than half the recommended dosages were equally effective as higher concentrations in preventing sprouting of treated stumps. The ineffectiveness of 2XL may imply a need for protein-mitigated diffusion of glyphosate across cell walls and into the vascular tissue of the plant, which would be inhibited by the breakdown of cell walls.
Finally, I tested how deeper intensities of mulching-head treatments affected the sprouting response of Amur honeysuckle and the response of the herbaceous-layer plant community after treatment. I found a negative relationship between the volume of sprouting Amur honeysuckle and increasing depth of mulching-head treatment. Additionally, increasing mulching-head intensities were correlated with increased herbaceous layer diversity and conservation value as represented by Floristic Quality Index. Mulching-head treatments are a promising tool in controlling heavy invasions of non-native shrubs.