Дисертації з теми "Production Environmental aspects"
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Revheim, Lars Petter Rein. "Energy and Environmental Aspects of an FPSO for LNG Production." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-12880.
Повний текст джерелаKimm, Nicola Karin. "Economic and Environmental Aspects of Integration in Chemical Production Sites." [S.l. : s.n.], 2008. http://digbib.ubka.uni-karlsruhe.de/volltexte/1000009071.
Повний текст джерелаYu, Chuan, and 余川. "Life cycle analysis of different feedstocks of biodiesel production." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B49618027.
Повний текст джерелаpublished_or_final_version
Mechanical Engineering
Master
Master of Philosophy
Coulter, Stewart. "Reducing environmental impact through systematic product evolution." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/17932.
Повний текст джерелаBiehl, Markus. "The value of clean manufacturing strategies for manufacturing management under the influence of environmental policy." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/30330.
Повний текст джерелаAschner, Andrew Mechanical & Manufacturing Engineering Faculty of Engineering UNSW. "Planning for sustainability through cleaner production." Awarded by:University of New South Wales. School of Mechanical and Manufacturing Engineering, 2004. http://handle.unsw.edu.au/1959.4/20669.
Повний текст джерелаWilgenbusch, Brian. "Developing an information management system for an environmental and economic monitoring system." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17331.
Повний текст джерелаPage, Andre Paul. "The barriers and opportunities of resource efficiency and cleaner production within a South African context." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2800.
Повний текст джерелаThis research study investigates how environmental tools such as Resource Efficiency and Cleaner Production (RECP) can contribute to sustaining and supporting economic growth in South Africa. Resource optimisation is crucial when considering the concept of sustainable development. It also contributes to addressing the challenges of global warming and climate change, which in turn threaten industrial growth and sustainability in the long term. The study places emphasis on the barriers that prevent industry from implementing RECP recommendations, and identifies opportunities that could potentially reposition businesses should they consider implementation. It also promotes other sustainability tools that are available through collaboration with international entities, and this could be of great benefit to the South African industry. Factors of unemployment and urbanisation restricts national growth to some degree, hence the study explores how RECP can contribute to job retention by introducing new resource optimisation methodologies for the manufacturing sector, Moreover, it examines the imbalance between the demand as well as limitations of these resources. Through the compilation of data collated from questionnaires completed by industry, government and civil society participants, this study looks at achieving a balance between environmental sustainability and growth. It also looks at aligning this balance with the integration of specific economic and environmental policies, which also includes social aspects. What comes through significantly in this research is the lack of awareness within industry in terms of RECP, as well as the importance of prioritising the uptake of environmental initiatives to ensure that industry is compliant with the stringent policies and legislation designed by government to drive the sustainability process. Consequently the study shows that communication between public and private sector, as well as the awareness raising and marketing of sustainability to consumers need to be improved. An analysis of the various government support mechanisms is conducted, in respect of how industry could potentially leverage growth and drive positive change within their businesses. In addition to RECP, emphasis is placed on other Sustainable Consumption and Production (SCP) initiatives and tools that could possibly entrench sustainable practices and help with their incorporation into their business strategies.
Flanagan, Mark Steven. "Environmental and agronomic aspects of municipal solid waste heavy fraction used for turfgrass production." Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-07282008-134805/.
Повний текст джерелаChan, Tak-him, and 陳德謙. "From international regulation to green production: continuous challenges to our textile and clothingindustry." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B43893648.
Повний текст джерелаChow, Kwok-on Desmond, and 周國安. "The environmental improvement due to the relocation of base load gas production plant from Ma Tau Kok to Tai Po industrial estate." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B4257433X.
Повний текст джерелаStuart, Julie Ann. "A strategic environmentally conscious production decision model." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/24160.
Повний текст джерелаMuller, Johannes Christoffel. "Comparative financial and environmental life cycle assessment of three South African pork production chains." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96815.
Повний текст джерелаENGLISH ABSTRACT: The world demand for animal proteins and profit-driven production has led to producing animal proteins intensively. Intensive pork production systems have traditionally had a poor image with the public, because these production systems are associated with environmental pollution. Currently, pigs are produced on highly specialised farms, and are fed concentrated (often imported) pig feed. The resulting higher production and higher animal densities contribute to an increased pollution of water, soil and air. The aim of this study is to determine the energy balance and emissions of three case studies, and to compare these results with their financial performance. The impacts will be recorded in the following impact categories: global warming potential (GWP), acidification potential (AP), eutrophication potential (EP) and Energy Use (EU). The case studies are three typical South African pig production facilities selected by the South African pork producer’s organisation (SAPPO). The production inputs, from the feed acquisition to the delivery of one kg of pig at the farm gate, were included. The three farms are located in different areas in South Africa, namely KwaZulu-Natal province (Case study 1), North-West province (Case study 2) and Western Cape province (Case study 3). The functional unit (FU) for this study is defined as 1 kg of South African pig (live-weight) at the farm gate. This study found that the GWP/FU of Case study 2 is 4 and 2 % higher than Case studies 1 and 3 respectively. The EP/FU of Case study 1 is 9 and 6 % higher than Case studies 2 and 3 respectively. The AP/FU of Case study 1 is 4 and 5 % higher than Case studies 2 and 3 respectively. The EU/FU of Case study 3 is 45 % and 16 % higher than Case studies 1 and 2 respectively. The major activities that contributed to the environmental impact categories were the slurry management activity, followed by electricity usage. The financial and environmental performance comparison did show deviations. Therefore, it is recommended that environmental and financial performance measurements be made, in order to create a true reflection of the impacts. The potential for improvement in financial and environmental performance proved to be significant in the productivity of the sow herd, as well as in the management of the piglets. The location of the production facility does not claim to hold have significant environmental or financial implications. Management of the emissions produced by piggeries can offset the impact of the piggery's location.
AFRIKAANSE OPSOMMING: Nie beskikbaar.
Pornprasitpol, Pornwan Mechanical & Manufacturing Engineering Faculty of Engineering UNSW. "Selective disassembly for re-use of industrial products." Awarded by:University of New South Wales. School of Mechanical and Manufacturing Engineering, 2006. http://handle.unsw.edu.au/1959.4/24274.
Повний текст джерелаEllis, Ciaran R. "Valuing wild pollinators for sustainable crop production." Thesis, University of Stirling, 2014. http://hdl.handle.net/1893/22327.
Повний текст джерелаNeill, Holly Ann. "The Production of Organic Nitrates in Portland Oregon and the Columbia River Gorge." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/681.
Повний текст джерелаMazhar, Muhammad Ilyas Mechanical & Manufacturing Engineering Faculty of Engineering UNSW. "Lifetime monitoring of appliances for reuse." Awarded by:University of New South Wales. School of Mechanical and Manufacturing Engineering, 2006. http://handle.unsw.edu.au/1959.4/25963.
Повний текст джерелаSmith, Kiara L. "Anaerobic Degradation of Polycyclic Aromatic Hydrocarbons at a Creosote-Contaminated Superfund Site and the Significance of Increased Methane Production in an Organophilic Clay Sediment Cap." PDXScholar, 2010. https://pdxscholar.library.pdx.edu/open_access_etds/101.
Повний текст джерелаLarwood, Andrew John. "Cleaner production : promoting and achieving it in the South Australian foundry industry." Title page, table of contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09ENV/09envl336.pdf.
Повний текст джерелаBezy, Susana Elizabeth. "A life-cycle assessment of concrete in Hong Kong: the consumption and disposal of concrete materials andthe environmental criteria and factors regarding its production, useand disposal." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31253040.
Повний текст джерелаMay, John R. (John Robert) 1978. "Sustainability of electricity generation using Australian fossil fuels." Monash University, Dept. of Chemical Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/9537.
Повний текст джерелаCheung, Wai-hung Tony, and 張偉雄. "Harbour reclamation in Hong Kong: land production and landuse planning : the environmental perspective." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31980156.
Повний текст джерелаDuncan, Scott Joseph. "A mass and energy data collection system to support environmental and economic assessment of a coating line in carpet manufacturing." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/17330.
Повний текст джерелаKowey, Bernadette Nola. "An example of planning for sustainable production : the dry-cell battery problem." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29975.
Повний текст джерелаApplied Science, Faculty of
Community and Regional Planning (SCARP), School of
Graduate
Newcomb, Patrick James. "Implications of modularity on product design for the life cycle." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17593.
Повний текст джерелаBeiker, Kair Alexandros, and Konstantinos Sofos. "Additive Manufacturing and Production of Metallic Parts in Automotive Industry : A Case Study on Technical, Economic and Environmental Sustainability Aspects." Thesis, KTH, Industriell produktion, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149669.
Повний текст джерелаAdditive Manufacturing (AM) består av en familj av olika teknologier som bygger upp komponenter genom att lägga till material lager efter lager ett lager i taget baserat på en digital 3D solid modell. Efter trettio år av utveckling, har AM blivit en mainstream tillverkningsprocess med fler material och nya teknologier involverade i denna process. Utan tvekan har den mest dramatiska och utmanande utvecklingen inom denna grupp av teknologier varit tryckningen av metaller. Nuförtiden fortsätter användningen av AM för tillverkning av delar till slutprodukter att växa. Företag runtom i världen använder tekniken framgångsrikt för produktionen av färdiga varor. AM tillåter designoptimering och tillverkar kundanpassade delar on-demand med nästan samma materialegenskaper som konventionellt tillverkade delar. Det behövs inte användning av kylmedel, fixturer, skärverktyg och andra källor. Fördelarna med AM jämfört med konventionell tillverkning kan förändra den industriella världen och leda till en ny industriell revolution. Efter att mestadels ha gått igenom de olika tekniker och material som används i metallisk AM, beskrivs i denna forskning applikationen av dem i en komponent av motorn till en personbil. En kritikalitet analys görs för att bestämma vilken AM utveckling av de delar som utgör den slutgiltiga produkten som är viktigast för effektiviteten av den totala produktionen. Baserat på denna utveckling utförs en hållbarhetsanalys som består av en analys av miljöpåverkan, produktionskostnad och de samhälleliga effekterna. Men det som har härletts från analysen är att trots den lägre miljöpåverkan i jämförelse med gjutning som en konventionell metod för formning av metaller, är AM kostsamt för produktionen av ett fåtal industriella produkter och dess samhälleliga effekter behöver studeras ytterligare. I själva verket beror kostnaden på produktionsvolymen, satsstorleken samt det höga priset på materialpulvren och byggnadstakten av maskinerna. I framtiden, med mer avancerade maskiner och billigare material kommer kostnaden för metallisk AM att sjunka dramatiskt. Trots alla utveckling, är applikationen av metallisk AM fortfarande inte utbredd. Eftersom materialen samt dess teknik fortfarande är under utveckling förutses en bättre och mer lovande framtid för metallisk AM. Nyckelord: Additive Manufacturing, Direct Digital Manufacturing, massproduktion, bilindustrin, förbränningsmotor, Turbocharger, utveckling, hållbarhetsanalys, livscykelanalys.
Sheridan, Craig. "A critical process analysis of wine production to improve cost efficiency, wine quality and environmental performance." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53239.
Повний текст джерелаENGLISH ABSTRACT: Wine cellars are diverse in terms of equipment types and process configurations. Whilst other food production processes have, in many cases, been properly analysed and modelled, this process diversity has resulted in an absence of process analyses in the wine industry. Each wine cellar is unique and represents a fully integrated agro-business, starting with a raw material (grapes) and extending to marketing and selling of the final product (wine). This makes the wine industry unique in this context. This study is the first attempt to analyse winemaking procedures in the form of a process audit. The study was approached in the following manner: • A questionnaire was developed to assess cellar configurations and conditions. This questionnaire was submitted to a statistically significant number of cellars, and a statistically significant number of questionnaires were returned. • The data collected from the questionnaire were statistically analysed and associations between equipment or procedures and wine faults were identified. • Three cellars were studied in depth. These three cellars had their processes audited and their effluent characterised. Additional data were obtained from current sampling projects and these data were analysed to complement the data obtained from the questionnaire • A preliminary input/output model was developed. The major results of this study are: • It was found that certain faults that appear in wine might be associated with equipment and/or process faults. These associations are statistically significant and they show that cellar hygiene is of critical importance when assessing these wine faults. The most important of these faults are VA, microbial contamination of the wine, sluggish and stuck fermentations. A risk hierarchy was derived to indicate which events are associated with others most strongly. • It was found that few wineries measure water consumption and even fewer wineries measure the quantity of effluent produced. • Correlations have been developed to predict winery parameters in terms of tons of grapes pressed per annum. These parameters include water and electricity consumed, wine produced and the quantity of effluent produced. Effluent characteristics have also been correlated to the tons of grapes pressed per annum. These characteristics include chemical oxygen demand, sodium absorption ratio and total dissolved solids in solution. Chemical oxygen demand was identified as the most important contributing factor in winery effluent. It was shown that all variables rise with an increase in cellar size, but the rise is not linear. This implies that large cellars have greater quantities of effluent of lower quality than small cellars. Most cellars have effluent concentrations that require some form of effluent treatment. The characterisation of effluent shows that the most widely used disposal practice is irrigation, and that the effluent disposed in this manner does not meet legislative requirements. • A preliminary input/output model was developed in order to enable wineries that have not measured the relevant parameters to predict the abovementioned variations. The resolution of these predictions is low but the model serves to provide an initial estimate if there are no data available. The model will give industrial averages for any given cellar size. • An economic balance was performed using this preliminary model. It was shown that if cellars were to lower the consumption of utilities and to reduce the strength of their effluent (using cleaner practices and not dilution) the reduction of operating costs could be reduced by 14% for smaller cellars to 17% for larger cellars. This study has shown that it is possible to make wine in a more environmentally friendly manner, producing better quality wines, without incurring extra costs.
AFRIKAANSE OPSOMMING: Wynkelders is diverse eenhede ten opsigte van die tipe toerusting en prosesse wat gebruik word. Terwyl ander prosesse rondom voedselproduksie in baie gevalle reeds geanaliseer en gemodelleer is, het die diversiteit in die wynindustrie gelei tot 'n afwesigheid van prosesanalises. Elke wynkelder is uniek en verteenwoordig 'n ten voile geintegreerde agro-besigheid wat begin met die rou materiaal (druiwe) en lei tot die bemarking en verkope van die finale produk (wyn), 'n eienskap wat die wynindustrie uniek maak in hierdie verband. Hierdie studie is die eerste poging om die wynmaakproses in die vorm van ‘n proses-oudit te analiseer. Die studie is soos volg aangepak: • ‘n Vraelys is ontwikkel om kelderkonfigurasies en -toestande te ondersoek. Die vraelys is aan ‘n statisties betekenisvolle aantal kelders voorgele, en ‘n statisties betekenisvolle aantal vraelyste is terugontvang. • Die data wat uit die vraelyste ontvang is, is statisties ontleed en verwantskappe tussen toerusting of prosesse en wyngebreke is geidentifiseer. • Drie kelders is in diepte bestudeer. Hierdie drie kelders se prosesse is geoudit en die afvloeiwater is gekarakteriseer. Addisionele data is verkry van huidige projekte en hierdie data is ge-analiseer om die data van die vraelys aan te vul. • ‘n Voorlopige inset / uitset model is ontwikkel. Die belangrikste resultate van hierdie studie is: • Dit is bevind dat sekere gebreke wat in wyn voorkom geassosieer kan word met tekortkominge in toerusting en/of prosesse in die kelder. Hierdie assosiasies is statisties betekenisvol en toon dat kelderhigtene van kritiese belang is wanneer gebreke in wyn ondersoek word. Die mees belangrike gebreke wat voorkom is vlugtige suur, mikrobiese kontaminasie van wyn, slepende en gestaakte fermentasie. ‘n Risikohierargie is afgelei om die gebeure te toon wat die sterktste met mekaar geassosieer word. • Dit is gevind dat min wynkelders waterverbruik meet. Selfs minder kelders meet die hoeveelheid afvloeiwater wat geproduseer word. • Korrelasies is ontwikkel om kelderparameters te voorspel in terme van ton druiwe gepars per jaar. Hierdie parameters sluit in water- en elektrisiteitsverbruik, wyn geprosuseer en hoeveelheid afvloeiwater geproduseer. Eienskappe van afvloeiwater is ook gekorreleer met die ton druiwe wat per jaar gepars word. Hierdie eienskappe sluit in chemiese suurstofbehoeftes, natrium absorpsieverhoudings en totale opgeloste soliede materiaal in oplossing. Chemiese suurstofbehoeftes is geidentifiseer as die mees belangrike bydraende faktor tot afvloeiwater in kelders. Dit is getoon dat alle veranderlikes verhoog hoe groter die kelder, maar hierdie verhoging is nie lineer nie. Dit impliseer dat groter kelder meer afvloeiwater van ‘n laer kwaliteit produseer. Die meeste kelders produseer afvloeiwater van sodanige konsentrasies dat behandeling daarvan nodig is. Die ondersoek van hierdie afvloeiwater toon dat die mees algemene wyse van wegdoening van afvloeiwater besproeiing is, en dat afvloeiwater wat op hierdie manier weggedoen word, nie voldoen aan die wetgewing se vereistes nie. • 'n Voorlopige inset/uitset model is ontwikkel om kelders wat nie die toepaslike parameters gemeet het nie in staat te stel om hierdie parameters te voorspel. Die akuraatheid van hierdie voorspellings is nie hoog nie, maar die model verskaf ‘n aanvanklike skatting waar daar geen data beskikbaar is nie. Die model verskaf industriele gemiddeldes aan kelders van enige grootte. • ‘n Ekonomiese balans is uitgevoer deur van hierdie model gebruik te maak. Dit is getoon dat indien kelders die gebruik van water en elektrisiteit verminder en die konsentrasie van afvloeiwater verlaag (deur van skoner paktyke gebruik te maak, en nie verdunning nie) die bestuurskoste met 14% vir kleiner kelders tot 17% vir groter kelders verlaag kan word. Die studie het getoon dat dit moontlik is om wyn te maak op ‘n meer omgewingsvriendelike wyse, en sodoende beter kwaliteit wyn te produseer sonder addisionele kostes.
Jebe, Thulisa. "Potential socio-economic implications of ethanol production as a green economic initiative in Cradock, Eastern Cape." Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2776.
Повний текст джерелаSouth Africa is taking a continental lead towards the transition of the green economy, and the energy sector has been identified as one of the cornerstones integral in this transition. This transition pays attention to alternative energy sources to gradually replace fossil fuels. Recently, the production of ethanol is seen as an energy source that is an integral player in achieving a green economy. The ethanol production project is linked to the improvement of the economy, and social well-being concomitant with the enhancement of the environmental quality tenets embodied by the green economy. Scholars have noted that these projects tend to ignore socio-economic realities of under privileged people especially in rural areas and small towns. While the green energy is often presented by the state there is, however, no evidence of the positive as well as negative impacts of ethanol projects on improving the livelihoods of the local communities or contributing to the substance of the local economies while protecting the quality of the environment. This thesis explored the subject of ethanol projects as green economic models in the context of the ethanol project in Cradock. The thesis investigated the socio-economic implications of the ethanol project in Cradock as a green economic model. The research study argues that the inclusion of the local people in decision making for the ethanol project is crucial to securing their benefits from the project. This means that local people should be involved early in the decision making process. Failure to engage the local residents in the initial stages of decision making, may create a lack of sense of ownership resulting in a lack of socio-economic benefits for the residents. The research study adopted a qualitative research design and an inductive approach. The ethanol project in Cradock was used as a case study for the research, and two sampling techniques, purposive sampling and random sampling were used. Interviews, questionnaires and observations were used to collect data from the residents of Cradock, the business sector (hospitality, tourism and agricultural retail), the emerging farmers, the farm workers, the Agrarian Research Development Agency, and Government Departments (Local Economic Development, Department of Agriculture, Department of Rural Development and Land Reform). The findings illustrate that the ethanol project in Cradock is not consistent with the tenets of a green economic model. The results suggested that the project does not improve the livelihood of the community or contribute to the sustenance of the local economies while protecting the quality of the environment. From an environmental perspective, while the ethanol project regarding providing ethanol fuel contributes positively to the global green agenda, it deteriorates the quality of the local environment. The project pollutes the local environment which is a source of livelihood for the local people and the economy. Therefore, the adverse effect of the project on the local environment contributes to a negative effect on the local economy and livelihood of the residents. The results also revealed that the project stakeholders, particularly the residents of Cradock and the emerging farmers, were not involved in the early stages of the project where the benefits were determined. As a result, the stakeholders do not have a sense of ownership of the project, and there are uncertainties about the sustainability of their socio-economic benefits. The ethanol project introduces a shift from the traditional commercial agriculture to the production of biofuel feedstock. This causes an effect on the local economy and livelihood because traditional commercial agriculture has sustained the town for more than 200 years. The thesis raises questions about the notion that ethanol projects are green economic models.
Mainganye, Dakalo. "Synthesis of zeolites from South African coal fly ash: investigation of scale-up conditions." Thesis, Cape Peninsula University of Technology, 2012. http://hdl.handle.net/20.500.11838/915.
Повний текст джерелаThe generation of electricity from coal in South Africa results in millions of tons of fly ash being produced each year. Less than 10 % of the fly ash generated is being used constructively and the remaining unused ash is currently inducing disposal and environmental problems. Intensive research on the utilisation of fly ash has been conducted either to reduce the cost of disposal or to minimise its impact on the environment. It has been shown that South African fly ash can be used as a feedstock for zeolite synthesis due to its compositional dominance of aluminosilicate and silicate phases. Most of the studies conducted on zeolite synthesis using South African fly ash are performed on small laboratory scale. Therefore, production of zeolites on an industrial/pilot plant scale would, in addition to producing a valuable product, help abate the pollution caused by the disposal of fly ash in the country. This research focuses on the investigation of the scale-up opportunity of zeolite synthesis from South African fly ashes with the view of understanding the effects of some reactor and operational parameters on the quality of the zeolite produced. Two types of zeolites (zeolite Na-P1 and zeolite A) were synthesised via two different routes in this study: (1) a two stage hydrothermal synthesis method (zeolite Na-P1) and (2) alkaline fusion prior to hydrothermal synthesis (zeolite A). The synthesis variables evaluated in this study were; the effect of impeller design and agitation rates during the aging step (zeolite Na-P1) using three different impellers (anchor, 4-flat-blade and Archimedes screw impeller) at three agitation speeds (150, 200 and 300 rpm), the effect of fly ash composition and solvents (water sources) on the phase purity of both zeolite Na-P1 and zeolite A, and the effect of the hydrothermal reaction time during the synthesis of zeolite Na-P1 using low amorphous phase fly ash i.e. aging time (12-48 hours) and hydrothermal treatment time (12-48 hours). The raw materials (fly ashes from Arnot, Hendrina, Tutuka, Lethabo and Matla power stations) and the synthesised zeolite product were characterised chemically, mineralogically and morphologically by X-ray fluorescence spectrometry, X-ray powder diffraction and scanning electron microscopy. Other characterisation techniques used in the study were 1) Fourier transform infrared spectroscopy to provide structural information and also monitor the evolution of the zeolite crystals during synthesis and 2) inductively coupled plasma atomic emission (ICP-AES) and mass spectrometry for multi-elemental analysis of the synthesis solution and the solvents used in this study. The experimental results demonstrated that the phase purity of zeolite Na-P1 was strongly affected by agitation and the type of impeller used during the aging step of the synthesis process. A high crystalline zeolite Na-P1 was obtained with a 4-flat-blade impeller at a low agitation rate of 200 rpm. Although a pure phase of zeolite Na-P1 was obtained at low agitation rates, the variation in the mineralogy of the fly ash was found to affect the quality of the zeolite produced significantly. The results suggested that each batch of fly ash would require a separate optimisation process of the synthesis conditions. Therefore, there is a need to develop a database of the synthesis conditions for zeolite Na-P1 based on the fly ash composition. As a consequence, the scale-up synthesis of zeolite Na-P1 would require step-by-step optimisation of the synthesis conditions, since this zeolite was sensitive to the SiO2/Al2O3 ratio, agitation and the mineralogy of the fly ash. On the other hand, zeolite A synthesis had several advantages over zeolite Na-P1. The results suggested that a pure phase of zeolite A can be produced at very low reaction temperature (i.e. below 100 °C, compared to 140 °C for zeolite Na-P1), shorter reaction times (i.e. less than 8 hours compared to 4 days for zeolite Na-P1), with complete dissolution of fly ash phases and more importantly less sensitive to the SiO2/Al2O3 ratio of the raw materials. The zeolite A synthesis process was found to be more robust and as a result, it would be less rigorous to scale-up despite the energy requirements for fusion. This study showed for the first time that different impeller designs and agitation during the aging step can have a profound impact on the quality of the zeolite produced. Therefore, it is not only the hydrothermal synthesis conditions and the molar regime but also the dissolution kinetics of the feedstock that influence the outcome of the zeolite synthesis process. This study has also shown for the first time that a pure phase of zeolite A can be synthesised from various sources of South African fly ash containing different mineralogical and chemical compositions via the alkali fusion method under the same synthesis conditions. Therefore, the effective zeolitisation of fly ash on a large scale would assist to mitigate the depletion of resources and environmental problems caused by the disposal of fly ash.
Picha, Edwardsson Malin. "Towards a sustainable media system : Explorative studies of emerging media consumption trends and media processes for content production." Doctoral thesis, KTH, Medieteknik och interaktionsdesign, MID, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-164395.
Повний текст джерелаQC 20150416
Bezuidenhout, Sol. "Advantages associated with the implementation and integration of environmental management systems in small manufacturing businesses." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/20902.
Повний текст джерелаENGLISH ABSTRACT: TheSouthAfrican economy islargely dependant on small enterprisesas a valuable source of job creation, gross domestic product as well as product development and innovation, However, unfortunately there existsan extremeiy high failure rate among small businesswith 20%of startup businessesfailing within the firstyear of operation, and an almost 60% failure rate within the first6 years of existence, Thesestatisticshave initiated several research studies,and have been the focus of many businessbooks, in itseif, creating a vast industry of small businesssuccesstools and quick fix solutions, When considering the high failure rates of small businesses,the concepts surrounding sustainable development come into question by pure method of association, Sustainable development issueshave become a top priority globally and have moved up the corporate agenda in recent years. When trying to "marry" these two concepts, questions arise regarding the effect of integrating sustainability principles and management systems,with contemporary small businessstrategy. Theaim of thisstudy isto investigate existingcritical successmodels and to integrate some simple initial stages of sustainable development business strategy within these models. Expectantly, some of the principles contained in the formalisation of management systems that address sustainability issues,could be incorporated in traditional management models in an attempt to identify possible interventions and tools that might positivelyimpact on the successrate of small businessenterprises. These concepts would be tested by means of implementing a formal environmental management system (based on the ISO 14001standard) as an initial approach to addressingsustainabilitygoals, as a case study, The successful implementation of an ISO 14001 environmental management system at this small businessenterprise, realised several advantages for the company, and have been used to adapt traditional management models to include for some of the simple concepts of sustainable development.
AFRIKAANSE OPSOMMING: Die Suid Afrikaanse ekonomie is in 'n groot mate afhanklik van klein besighede as 'n waardevolle bron van werkskepping, bruto binnelandse produk, asook van produk ontwikkeling en innovasie, Des nieteenstaande, bestaan daar ongelukkig 'n baie hoe faling syfer onder klein besighede, met 20%van aanvangsbesighede wat mislukbinne die eerste jaar van bedryf en ongeveer 60%van besighede wat mislukbinne die eerste 6jaar van bestaan. Hierdie statistieke het reeds verskeie navorsingstudiesgeinisieer en was reeds die tema van verskeie boeke, wat opsig self 'n reuse industrie genereer van sake sukseshandleidings en kits oplossings vir verskeie probleme, Wanneer hierdie hoe falings statistieke onder klein sake ondernemings oorweeg word, bevraagteken mens die konsepte rakende volhoubare ontwikkeiing, bloot as gevolg van assosiasie,Volhoubare ontwikkeling het in die laaste paar jaar baie aandag geniet op die prioriteitsagendas internationaal, asook van verskeie korporatiewe agendas. As gepoog word om hierdie twee konsepte met mekaar te vereenselwig, ontwikkel daar verskeievrae rakende die effek van die integrering van volhoubare ontwikkelingsbeginselsen verwante bestuurstelsels,met bestaande kiein sake onderneming strategie, Die doel van hierdie studie isom bestaande suksesmodelIe vir klein sake ondernemings te ondersoek, en om sommige van die begin fase beginselsvan volhoubare besigheids strategie, met mekaar te integreer. Daar sou verwag kon word dot sommige van .die konsepte bevat in die formaiisering van bestuurstelselsrakende volhoubare ontwikkeling, ook geinkorporeer kan word binne bestaande traditionele bestuursmodelle, in 'n poging om moontlike ingrypings en gereedskap te identifiseer wat 'n positiewe impak kan he op die suksessyfersvan kleinsake ondernemings. Hierdie konsepte is getoets aan die hand van 'n implimentering van 'n formele omgewingsbestuurstelsel(gebasseer op die ISO14001standaard) as 'ngevalle studie, wat die begin benadering vorm om die doelwitte van volhoubaarheid aan te spreek. Die suksesvolleimplimentering van 'n ISO 14001omgewingsbestuurselsel by 'n klein sake onderneming het verskeie voordele vir hierdie maatskappy tot gevolg gehad. en is gebruik om tradisionele suksesmodelleaan te pas, om voorsiening te maak vir sommige van die konsepte rakende volhoubare ontwikkeling.
Retamales, Roberto. "A study of semi-intensive shrimp culture in Ecuador in relation to physical, chemical and biological conditions in the production ponds during El Nino and La Nina events (1996 to 1999)." Thesis, University of Stirling, 2002. http://hdl.handle.net/1893/3286.
Повний текст джерелаCopertino, Margareth. "Production ecology and ecophysiology of turf algal communities on a temperate reef (West Island, South Australia)." Title page, contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phc782.pdf.
Повний текст джерелаDohde, Farhan A. "Estimation of Air Emissions During Production Phase from Active Oil and Gas Wells in the Barnett Shale Basin: 2010-2013." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc799523/.
Повний текст джерелаBlanchard, Ryan. "An assessment of the potential biodiversity impacts from biofuel production in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95933.
Повний текст джерелаENGLISH ABSTRACT: Biofuels are being promoted as a global necessity to meet climate change targets through the replacement of fossil fuels. Many countries have identified biofuels as a potential mechanism to meet these challenges, with policy directives driving biofuel production. The South African government has proposed that biofuels form part of the country’s future renewable energy and has proposed a draft biofuel strategy. This study aims to investigate appropriate approaches to determine potential biodiversity impacts from biofuel production. Since biofuels are not currently grown to any large extent in South Africa, impact was modelled using future scenarios of converting available land within the Eastern Cape Province of South Africa. Suitable species were identified using the species distribution modelling programme MaxEnt. Some of the proposed biofuel crops were considered as invasive (i.e. they spread from sites where they are cultivated) or are very likely to be invasive in South Africa. This study also highlighted the considerable overlap between suitable growing areas and areas considered important for future biodiversity conservation. The biodiversity intactness index (BII), a broad based biodiversity indicator, was used to assess the biodiversity implications of transforming available land to biofuels. The BII indicates losses of biodiversity between 17.6% and 42.1% for the land use scenarios identified. An important finding was that excluding important biodiversity areas that occur outside of protected areas can reduce biodiversity losses by as much as 13% and maintain an overall intactness of ~70%. Currently the BII does not account for fragmentation or landscape configuration. This was addressed by developing a revised biodiversity intactness index (R-BII) which included the effect of patch-size and habitat fragmentation on biodiversity intactness. This study found that although the original BII reported on the biodiversity trends of large-scale shifts in land-use across multiple scales it could not detect changes in landscape configuration which was reflected by the R-BII. Land-use change can impact on ecosystem processes that underpin the provisioning of ecosystem services by changing the combinations of species and the plant functional traits within communities. The impacts of cultivating potential biofuel species (Acacia mearnsii, Sorghum halepense and Eucalyptus species) were investigated using a plant functional traits approach. These species were shown to affect the leaf nitrogen content, leaf phosphorous content and leaf dry matter content associated with important ecosystem functions within an ecosystem service hotspot in the Eastern Cape. A decline in functional diversity was reported for all transformed land-uses by as much as ~40%. These shifts may be used to identify potential changes to ecosystem services associated with natural vegetation. The methods used in this thesis highlight the overall relevance of this work and its importance to minimising biodiversity resulting from biofuel production. Some of the key findings address resolving spatial conflict, using biodiversity indicators, assessing impacts of potential invasive species and planning for ecosystem services. New drivers of change to land-use, such as biofuel production, are a major challenge to conservation biologists and planners and the insights derived in from this study can be successfully applied to guide biofuel production.
AFRIKAANSE OPSOMMING: Biobrandstof word internasionaal beskou as 'n noodsaaklike komponent in die bereiking van klimaatsverandering doelwitte deur fossielbrandstowwe daarmee te vervang. Daarom word biobrandstof deur verskeie lande geïmplementeer as 'n potensiële meganisme om aan hierdie uitdaging te voldoen. Die Suid-Afrikaanse regering het voorgestel dat biobrandstof deel vorm van die land se hernubare energie toekoms en het daarom 'n konsep biobrandstofstrategie voorgestel. Die aanvaarding van so 'n strategie sal waarskynlik ‘n aantal verreikende gevolge inhou. Hierdie studie gebruik verskeie benaderings ten einde die impak van biobrandstof produksie op biodiversiteit te bepaal. Aangesien biobrandstof nie tans ‘n beduidende bydra maak tot tradisionele brandstofproduksie in Suid-Afrika nie, word die impak daarvan geskoei op die omskakeling van beskikbare grond. Die Oos-Kaap provinsie van Suid-Afrika speel a sleutelrol in hierdie opsig en vorm daarom die fokus van hierdie analise. Geskikte spesies is geïdentifiseer deur die sagtewareprogram, MaxEnt, waardeur spesiesverspreiding gemodelleer word. Hierdie studie beklemtoon die aansienlike oorvleueling wat daar bestaan tussen geskikte aanplantingsgebiede en belangrike biodiversiteitsareas wat nie tans formeel bewaar word nie. Sommige van die voorgestelde biobrandstofgewasse is tans indringers, of het die potensiaal om indringerplante te word en daarom is daar toenemende kommer oor die kweek van biobrandstof gewasse in Suid-Afrika. Die “Biodiversity Intactness Index” (BII), 'n algemene biodiversiteitsaanwyser, is gebruik om die implikasies van grondomskakeling na biobrandstof op biodiversiteit te evalueer. Die BII dui op verliese van tussen 17,6% en 42,1% vir die grondgebruikscenario's wat geïdentifiseer is. 'n Belangrike bevinding was dat die uitsluiting van belangrike biodiversiteitsareas buite beskermde gebiede die verlies van biodiversiteit met soveel as 13% kan verminder en biodiversiteit eenheid van ~ 70% kan behou. Die BII maak egter nie tans voorsiening vir landskap fragmentasie nie. ‘n “Revised-Biodiversity Intactness Index” (R-BII) is ontwikkel wat die effek van kol-grootte en habitat op biodiversiteit eenheid insluit. Hierdie studie het bevind dat alhoewel die oorspronklike BII grootskaalse verandering in die grondgebruik op verskeie skale aandui, dit egter nie verandering in landskapsamestelling kon opspoor soos die R-BII nie. Ten slotte, die impak van die aanplanting van potensiële biobrandstofspesies (Acacia mearnsii, Sorghum halepense en Eucalyptus spesies) op biodiversiteit is ondersoek deur ‘n plant funksionele eienskappe benadering te gebruik. Daar is bevind dat hierdie spesies die stikstof, fosfor en droë materiaal inhoud van blare verander wat geassosieer word met belangrike ekosisteem funksies binne 'n biodiversiteit brandpunt in die Oos- Kaap. ‘n Vermindering van funksionele diversiteit van soveel as ~ 40% is binne alle omgeskakelde grondgebruike gevind. Hierdie skuiwe kan gebruik word om potensiële veranderinge van ekosisteemdienste te identifiseer en benadruk ook die potensiële impak van uitheemse spesies. Die metodes wat gebruik word in hierdie studie beklemtoon die relevansie van die werk asook die belangrikheid daarvan om die nadelige uitwerking van biobrandstofproduksie op biodiversiteit te minimaliseer. Verskeie benaderings tot die oplossing van ruimtelike konflik, die gebruik van biodiversiteitaanwysers, die beoordeling van die impak van die potensiële indringerspesies en die beplanning vir ekosisteemdienste. Nuwe dryfvere van grondgebruikverandering soos biobrandstof is 'n groot uitdaging en die insigte wat uit hierdie studie verkry is dra by tot die vermindering van die potensiële impak van biobrandstofproduksie op biodiversiteit.
Tsang, Heung-chun, and 曾向俊. "The impact of the global-warming-led climate change on agricultural production of major grain producing regions in China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46733048.
Повний текст джерелаForan, Tira. "Rivers of contention : Pak Mun Dam, electricity planning, and state-society relations in Thailand, 1932-2004." Connect to full text, 2006. http://hdl.handle.net/2123/1984.
Повний текст джерелаThis study investigates how actions – especially narratives and claims – of civil society advocates influenced electricity generation planning and hydropower project implementation, in the context of a democratising authoritarian state. To pursue this research agenda, I use a critical realist philosophy of science to ground a conceptual framework whose fundamental components consist of institutions, interests, and discourses. The research presents three case studies from Thailand, a nation-state with distinct authoritarian legacies, as well as significant economic and political dynamism in the late 20th century. The cases step from macro to micro levels of analysis: (1) Electricity generation planning: an overview and critique of the social construction of peak power demand and supply options in Thailand, 1960s–2004. I focus on the rise of energy conservation advocacy in the early 1990s, and the rise of more confrontational energy activism in the late 1990s; (2) Pak Mun Dam: contention between EGAT, anti-dam villagers, and other state and civil society actors, 1989–2003; (3) Pak Mun Dam: analysis of how knowledge discourses shaped debates over fisheries and local livelihoods in the lower Mun river basin, 1999–2004. I pursue these cases in the larger context of Thai state–society relations, 1932–early 2000s: from the Khana Ratsadorn (People’s Party) and its founders’ increasingly authoritarian struggles to shape the state; through to the rise of civil society in the Indochina-war era; through the emergence of parliamentary politics and NGO evolution in the 1980s and early 1990s; to the Thai Rak Thai “money politics” party that emerged in 1998. Specific research questions focus on patterns and outcomes of state–society interaction, the role of lay and expert knowledge discourses in structuring conflict, and plausible causal connections between outcomes and concepts used in the conceptual framework. The study is based on fieldwork conducted between 2001 and 2005, with 18 months of intensive work concentrated in 2002 and 2004. Recurrent procedures consisted of collecting policy narratives and arguments and re-constructing actors’ interests (including those of leaders in organizations) via participant observation, interviews, and textual analysis. The thesis argues that anti-dam advocates influenced project implementation practices at Pak Mun Dam by forming social change networks, gaining contingent recognition as new political actors. Through innovative and disruptive action, through claims for transparency and justice, through mass performances of worthiness, unity, and commitment, and through the production of local knowledge, they helped set agendas. They triggered elite intervention, as well as reactive counter-mobilization and occasional violence. The escalation of uncertainty from unintended outcomes challenged elites – aided by deliberative exchanges – to reconsider unfavourable decisions, to reconsider their preferences, and to make concessions. At the same time, a number of events made the Assembly of the Poor, the main anti-dam movement organization, vulnerable to destabilizing action at the local and national levels. These include: the formation of competitive organizations in the lower Mun basin; complex and intractable issues (such as multiple rounds of compensation); and inability to take credit for championing the interests of vulnerable small farmers. Destabilizing interactions occurred particularly in the restricted media space of the post-financial and economic crisis years. Populist platforms put forward by Thai Rak Thai and Prime Minister Thaksin Shinawatra pre-empted the AOP’s influence. Sustainable energy advocates influenced practices of power system planning by teaching new techniques of energy conservation, and diffusing new norms. In the recent period, however, as some of them engaged in more contentious interaction, such as intervening in conflicts over new coal and hydroelectric power plants (in southern Thailand and Laos respectively) they disrupted dominant rationalities, and found themselves confronting some of the same core practices of a power-wielding bureaucracy and an authoritarian state, namely rhetorical strategies that police the boundaries of policy-relevant knowledge. The thesis, intended to contribute to social science methodology and theory, concludes with a critical appraisal of the conceptual framework. I suggest new research agendas for analysts interested in mechanisms of civil society advocacy in the context of democratising states.
Gottfried, Gerald J. "Effects of patch clearcutting on water yield improvement and on timber production in an Arizona mixed conifer watershed." Diss., The University of Arizona, 1989. http://ezproxy.library.arizona.edu/login?url=.
Повний текст джерелаNolte, Mirco. "Commercial biodiesel production in South Africa : a preliminary economic feasibility study." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/369.
Повний текст джерела周厚華 and Donna Chaw. "Biochemical changes in the fermentation bedding of the "pig-on-litter"method of pig farming: with special emphasison biodegradation of nitrogen compounds and odour production." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B43893740.
Повний текст джерелаRiul, Marília. "Diagnóstico e diretrizes para a gestão de aspectos sociais e ambientais no APL de móveis de João Pessoa-PB." Universidade Federal da Paraíba, 2010. http://tede.biblioteca.ufpb.br:8080/handle/tede/4579.
Повний текст джерелаCoordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Productive and management strategies that emphasize social and environmental aspects are crucial in the context of social and environmental crisis. The furniture industry is an activity that needs attention, in face of the various environmental aspects and impacts involved in its activity, like the exaggerated volume of waste of production, the overexploitation and waste of wood and the use of toxic substances. Furthermore, the furniture production is predominantly performed by micro and small enterprises (MSEs), what results in incipient strategies of environmental management. This research intended to present a diagnostic of the behavior of the furniture enterprises that participates of the local production system (LPS) of the furniture sector in João Pessoa, Paraíba, in relation to social and environmental aspects. The chosen methods for the data collection were interviews to the businesses owners and direct observations in the enterprises. The results diagnosed that the studied enterprises still do not behave proactively in relation to various social and environmental aspects of the activity, and sometimes disclaim any responsibility on the grounds that the MSEs did not exert negative pressure on the environment and society. We highlight the problem of inadequate waste management, which triggers series of social and environmental risks such as pollution and damage to workers' health. From the diagnosis, it was possible to systematize recommendations for improving the environmental performance of companies in the LPS, based on the principles of unity and cooperation among enterprises.
A aplicação de práticas produtivas e de gestão com ênfase no respeito a aspectos sociais e ambientais é indispensável no contexto da crise socioambiental. A indústria moveleira é uma atividade que merece ser investigada, já que sua atuação envolve aspectos e impactos ambientais variados, a exemplo do grande volume de resíduos gerados, da exploração irracional e desperdício de madeira e do uso de substâncias tóxicas. Além disso, o setor moveleiro é composto predominantemente por micro e pequenas empresas, fato que implica em práticas incipientes de gestão com caráter ambiental, com prejuízos também para a sua economia. Nesse sentido, esta pesquisa pretendeu realizar um diagnóstico do comportamento atual das empresas de móveis que formam o arranjo produtivo local (APL) de Móveis de João Pessoa, Paraíba com relação a aspectos sociais e ambientais. A metodologia aplicada foi a pesquisa de campo, com coleta de dados através de um questionário direcionado aos empresários e um formulário para observação direta. Os resultados diagnosticaram que as empresas ainda não se comportam proativamente em relação a vários aspectos socioambientais da atividade, e por vezes se isentam de qualquer responsabilidade sob a justificativa de que as MPEs não exercem pressão negativa sobre o meio ambiente e social. Destaca-se o problema dos resíduos, cuja gestão ainda é inadequada, o que desencadeia série de riscos sociais e ambientais, como poluição e danos à saúde do trabalhador. A partir do diagnóstico, foi possível sistematizar recomendações para a melhoria do desempenho ambiental das empresas do APL, baseadas nos princípios de união e cooperação entre as empresas.
OLOFSSON, ELIN, ALEXANDER BRINK, and LINDA JOHANSSON. "En kartläggning av svensk ull och dess framtida användning." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-20174.
Повний текст джерелаAbstractThe thesis is developed from a proposition by Anders Ryberg at the county administration board of Västra Götaland. The proposition was to evaluate new fields of utility for the Swedish wool which today is disregarded. First off we give a basic description of the facts concerning the wool fiber in order for you as a reader to better comprehend how the wool fiber applies in different fields of utility, which is brought up later in the thesis. This is followed by a description of the environmental aspects which comes with the usage of wool, which also is important from a marketing point of view. The different types of wool we have in Sweden are then briefly described, followed by a presentation of Swedish companies and projects who are working with Swedish wool. Thereafter we describe the wool industries of Australia, Great Britain and Norway. Their marketing strategies and infrastructures for wool handling are important to acknowledge if the Swedish wool industry are to be able to compete in the future. We have also found many interesting fields of utility for the Swedish wool. Among many we have found geotextile, isolation and wool in waste management the easiest ones to produce looking at the prerequisites we have in Sweden. Our conclusions are that a lot of initiative will be needed, especially from the Swedish sheep owners, to be able to create a larger demand for Swedish wool. The way to go about it is by creating an infrastructure for collecting and sorting of the wool around the country, then implicate marketing with information about the unique abilities of wool and its positive environmental aspects.
Program: Textil produktutveckling med entreprenörs- och affärsinriktning
Ötsch, Rainald. "Stromerzeugung in Deutschland unter den Rahmenbedingungen von Klimapolitik und liberalisiertem Strommarkt : Bewertung von Kraftwerksinvestitionen mit Bayes’schen Einflussdiagrammen." Phd thesis, Universität Potsdam, 2012. http://opus.kobv.de/ubp/volltexte/2014/6905/.
Повний текст джерелаPower plant investors face large uncertainties due to ongoing liberalization, climate policy, and long investment horizons. This study provides a probabilistic appraisal of power plant investments within the framework of Bayesian decision theory. A Bayesian influence diagram is used for setting up a discounted cash flow model and analysing the profitability of power plants. As the study explicitly models merit order pricing, the pass-through of random fuel and carbon costs may be analysed. The study derives probabilistic statements about net present values of single investments and company portfolios and explores the sensitivity of profits to variations of select input variables. In the majority of cases, an increase in the price of emission allowances also increases the net present value of existing power plant portfolios. A substantially increased carbon prices also is the prerequisite to diversify power plant portfolios by gas and CCS plants. For the currently prevailing German electricity market, we argue that investors may lack incentives for new investments in fossil generation, a finding that holds true also with implementation of CCS. Our estimates are conservative, as profitability will further deteriorate with the build-up of renewables.
Graham, Garrett. ""Don't Frack with Denton"." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc984171/.
Повний текст джерелаMunro, Samantha Alanna. "A water footprint assessment of primary citrus production in the Lower Sundays River Valley Citrus Farms, Eastern Cape, South Africa." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1017558.
Повний текст джерелаRaffel, Ann Eileen. "Methyl Halide Production by Calcareous Periphyton Mats from the Florida Everglades." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/1524.
Повний текст джерелаJern, Isacsson Gretha, and Robin Emilie Elfsberg. "Rösterna bakom den blågröna vågen och jordbruksrevolutionen - Alternativ livsmedelsproduktion i prat och praktik." Thesis, Malmö universitet, Fakulteten för kultur och samhälle (KS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-22319.
Повний текст джерелаSweden's food system faces major challenges such as negative environmental impact and is dependent on importing both food and intermediate goods. Food production, which today is dominated by conventional agriculture, has meant, among other things, depleted soils and exploited resources as well as emissions of toxins. This study aims to compile and compare the scientific research and the public debate regarding alternative food production systems. The study is limited to account for the production systems regenerative agriculture and aquaponic systems. The scientific research regarding regenerative agriculture and aquaponic systems was compiled in a state of knowledge. A qualitative content analysis was performed to identify and compile the public debate about the systems. The public debate concerning alternative food production systems formed the following themes: the coordinating voice, the public voice, the researcher's voice, the operational voice, and the miscellaneous voice. Within these themes, the following six code words were identified: food supply, environmental aspects, economic aspects, social aspects, challenges and opportunities. In our study, we have not formulated any new concepts, however, we have found connections as well as discrepancies and gaps between the public debate and the scientific research.
Madzimure, James. "Climate change adaptation and economic valuation of local pig genetic resources in communal production systems of South Africa." Thesis, University of Fort Hare, 2011. http://hdl.handle.net/10353/427.
Повний текст джерелаStewart, Alan V. "Plant breeding aspects of ryegrasses (Lolium sp.) infected with endophytic fungi." Phd thesis, University of Canterbury. Lincoln College, 1987. http://theses.lincoln.ac.nz/public/adt-NZLIU20071005.172250/.
Повний текст джерелаBeyers, Hendrik Philippus. "The effect of haloxyfop-R-methyl ester and imazamox herbicides, tine or no tillage and nine different medic cultivars on the seed and dry matter production as well as the quality of medic pastures." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52517.
Повний текст джерелаENGLISH ABSTRACT: The aim of this study was to determine the effect of a grass herbicide, a broadleaf herbicide with some grass control capabilities, method of tillage (tine and no-tillage) at planting of wheat as well as different medic cultivars on the regeneration, dry matter (OM) production and quality of a medic pasture. The trial was conducted at Langgewens experimental farm in the Swartland wheat producing area. Nine medic cultivars of three different species were evaluated after being sprayed with either haloxyfop-R-methyl (HAL) ester or imazamox (IMI) and subjected to either a tine tillage or a no tillage treatment at planting of wheat. Soil samples were taken during January 2000 to determine the size of the medic and weed seedbank as well as the degree of dormancy in the medic seeds, while OM samples were taken throughout the growing season to determine the OM production of the different medic cultivars and weed species. OM samples taken during October 1998 on the same pasture, were used to determine the crude protein (CP) and neutral detergent fibre (NOF) content of the pasture. The samples were subjected to in vitro digestion and the digestibility of pasture CP (OCP), NOF(ONOF) and DM (DOM)were determined. Results showed that seedling establishment differed between cultivars used, herbicide treatments applied as well as the crop stage in the rotation. The cultivars produced more seedlings where IMI was applied compared to HAL as well as where the area consisted of two year pasture compared to one year pasture (1998) and one year wheat (1999). After a year of pasture and a year of wheat, cultivars Sephi and Paraggio produced the most seedlings, while Caliph and Orion produced the least. Caliph however, showed a very high degree of seed dormancy while Orion's low seedling establishment was due to its sensitivity to the IMI herbicide used. Little difference was found between the nine cultivars early in the season (July - August) with regard to cumulative OM production, except for Orion, whose growth was severely damaged by the IMI treatment. At the end of the growing season (October), the cultivar Caliph's cumulative OM production (2010.1 kg/ha) was significantly higher than all the other cultivars, except for Parabinga (1053. 4 kg/ha). Oifferent pasture samples, of which the botanical composition was known, was analysed for CP, NOF, OOM, OCP and ONOF. There was no significant difference in pasture composition during 1998 but variation in the pasture composition did however cause the IMI treatment, compared to the HAL treatment, to have a lower ONOFand OOMcontent. A modelling procedure was used to predict the pasture quality parameters (CP, NOF, OOM,OCP and ONOF) from the pasture composition (medic hay, medic pods, grassy and broadleaf weeds). This prediction of CP, NOF, OOM, ONOF and OCP from the pasture components had a relative low accuracy (49 -74.1 %) and a further refinement of this model for possible use on farms in order to improve grazing management and animal production is advised. In conclusion it could be said that broadleaf weed control caused a definite increase in medic seed and OMproduction, but Orion should not be used with an IMI herbicide. All the cultivars, except for Orion, produced enough seedlings up to the second year to ensure sustainability of the medic pasture. All the cultivars, except for Orion, produced a sufficient amount of OM early in the growing season. Caliph however, produced by far the most OM later in the growing season. A reduction of broadleaf weeds and medic pods will increase the digestibility of NOFand OMand therefore increase the quality of the pasture. Pods however are an important part of summer forage and the aim should therefore rather be to reduce the number of broadleaf weeds in the pasture.
AFRIKAANSE OPSOMMING: Die doel van hierdie studie was om die effek van 'n gras en breëblaar onkruiddoder (wat sekere grasse beheer), metode van bewerking tydens die saai van koring asook nege verskillende medic kultivars op die regenerasie, droë materiaal produksie en kwaliteit van medic weidings te bepaal. Die proef is gedoen op Langgewens proefplaas wat geleë is in die Swartland koring produserende gebied. Nege medic kultivars is geëvalueer nadat die weiding met of haloxyfop-R-metiel ester (HAL) of imazamox (IMI) onkruiddoders gespuit is en onderwerp is aan of 'n vlak tand of geen bewerking tydens die saai van koring. Grondmonsters is geneem in Januarie 2000 om die grootte van die medic en onkruid saadbank asook om die graad van dormansie in die verskillende medic kultivars se sade te bepaal. Droë materiaal monsters is gedurende die 2000 groeiseisoen geneem om die droë materiaal produksie van die verskillende medic kultivars asook onkruid spesies te bepaal. Droë materiaal monsters is gedurende Oktober 1998 geneem en gebruik om die ruproteïn (CP) en neutraaloplosbare vesel (NDF) inhoud van die weiding te bepaal. Die monsters is in vitro verteer en die verteerbaarheid van CP (OCP), NDF (ONOF) en droë materiaal (DOM) is bepaal. Resultate wys dat saailing vestiging verskil tussen die verskillende kultivars wat gebruik is, verskillende onkruiddoder behandelings asook die stadium van die weidings/koring. Die kultivars het meer geproduseer waar die weiding met IMI behandel is in vergelyking met waar HAL toegedien is, asook waar koring nog nie gesaai is nie. Na 'n jaar van weiding en 'n jaar van koring, het die kultivars Sephi en Paraggio die meeste saailinge, en Caliph en Orion die minste saailinge gehad. Caliph het egter 'n hoë graad van dormansie in sy saad getoon, terwyl die swak vestiging van Orion die gevolg is van die kultivar se hoë sensitiwiteit teenoor IMI. Min verskil is gevind tussen die nege kultivars, vroeg in die groei seisoen (Julie - Augustus), wat kumulatiewe droë materiaal produksie betref, behalwe vir Orion wat erg beskadig is deur die IMI behandeling. Aan die einde van die groeiseisoen (Oktober 2000) was die kumulatiewe droë materiaal produksie van die kultivar Caliph (2010.1 kg/ha) betekenisvol hoër as al die ander kultivars behalwe vir Parabinga (1053.4 kg/ha). Weidingsmonsters, waarvan die botaniese samestelling bekend was, is ontleed vir CP, NDF, DDM, DCP en DNDF. Daar is geen betekenisvolle verskille gevind in die botaniese samestelling van die weidingmonsters geneem in 1998 nie,maar die variasie in botaniese samestelling het veroorsaak dat IMI in vergelyking met HAL 'n laer DNDF and DDM inhoud het. 'n Model is opgestel wat die weidingskomponente (medic hooi, medic peule, gras en breëblaar onkruide) gebruik om die kwaliteits parameters (CP, NDF, DDM, DCP en DNDF) van die weiding te skat. Hierdie skatting van CP, NDF, DDM, DCP en DNDF deur van die weidingskomponente gebruik te maak het 'n relatiewe lae akuraatheid gehad (49 -74.1 %) en verdere verfyning van hierdie model vir moontlike gebruik op plase, ten einde weidings bestuur en diere produksie te verbeter, word voorgestel. Die gevolgtrekking kan gemaak word dat breëblaar onkruidbeheer 'n definitiewe verbetering in die medic saailing en droë materiaal produksie van die medies te weeg gebring het, maar die kultivar Orion behoort nie saam met 'n IMI gebruik te word nie. AI die getoetste kultivars, behalwe Orion, het voldoende saad oorlewing vertoon tot en met die tweede jaar van die rotasie om lewensvatbaarheid van die sisteem te verseker en alle kultivars, behalwe Orion, het voldoende droë materiaal produseer vroeg in die groeiseisoen. Caliph het egter laat in die groeiseisoen by verre die meeste droë materiaal geproduseer. 'n Vermindering in die hoeveelheid breëblaar onkruide en peule in die weiding sal tot 'n verhoging in die verteerbaarheid van NDF en DM lei en dus 'n verhoging in die kwaliteit van die weiding tot gevolg hê. Peule is egter 'n belangrike bron van voedsel aan weidende diere gedurende droë somermaande en die verbetering van weidings moet eerder gedoen word deur te poog om breëblaar onkruide te beheer.