Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 53 for “"greenhouses"”.
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DEHUMIDIFICATION OF GREENHOUSES IN COLD REGIONS
Greenhouses in cold regions often exhibit conditions of high relative humidity (RH). Frequent high RH levels of over 80% result in poor yields and undesirable crop quality, as well as poor working conditions for employees. The objective of this study was to seek an effective and economical …
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Light and Heat Selective Polymer Nanocomposite Films for Sustainable Greenhouses
… production and reducing energy consumption in greenhouses. The QDs, synthesized by colloidal chemistry using a single-molecular precursor method, along with commercial SA particles were integrated into EVA films by melt mixing the particles with the plastic in a mini-compounder. The resulting …
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Study of Liquid Desiccant Air-Conditioning for High Performance Greenhouses
Greenhouses have become an invaluable source of year-round food production. Further development of viable and efficient high performance greenhouses is important for future food security. Closing the greenhouse envelope from the environment can provide benefits in space heating energy savings, pest …
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Evaluating energy consumption within Icelandic greenhouses : towards sustainable and efficient vegetable production
… looks at options for increased efficiency in greenhouses to determine how local food production could increase without the increasing electricity demand. Additionally, various calculations were made to determine how much energy is required to meet the Icelandic dietary recommendations for …
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A systematic heat recovery approach for designing integrated heating, cooling, and ventilation systems for greenhouses
La récupération de chaleur joue un rôle crucial dans l'amélioration de l'efficacité énergétique et la réduction des coûts opérationnels dans le secteur de l'énergie. Dans le contexte de la gestion de l'énergie des serres, les mesures de récupération de chaleur offrent un potentiel significatif pour …
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Development of safety and sustainability metrics for greenhouses and analysis of selected greenhouse sites in North America
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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Investigating optimum wavelength(s) for growth of Lactuca sativa, L. using tunable LED sources and developing thin-film filters for glass greenhouses
With the increase in world population, the continued advances in modern greenhouse agriculture and plant growth practices are expected to help overcome the global problem of future food shortages. This research investigates a way to assist in stemming the problem of food shortage by using optimised …
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Ecology and Management of Pythium species in Float Greenhouse Tobacco Transplant Production
… to 70% seedling loss in hydroponic (float-bed) greenhouses. However, the symptoms and consequences of Pythium diseases are often variable among these greenhouses. A tobacco transplant greenhouse survey was conducted in 2017 in order to investigate the sources of this variability, especially the …
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Anemometry tools and procedures for greenhouse experiments
Greenhouses provide a useful environment for conducting plant studies, facilitating manipulation and measurement of many variables in the plant microclimate. Photosynthesis, transpiration, thigmomorphogenic responses, and particle transport all depend on the level of air speed at the …
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El Milagro De Almeria, Espana: A Political Ecology of Landscape Change and Greenhouse Agriculture
… of Almería has the highest concentration of greenhouses in the world and determines what processes led to this industry. The research focuses on local-global scale interactions and environmental history analysis within a political ecology framework. The methods for data collection included …
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El Milagro De Almeria, Espana: A Political Ecology of Landscape Change and Greenhouse Agriculture
… of Almería has the highest concentration of greenhouses in the world and determines what processes led to this industry. The research focuses on local-global scale interactions and environmental history analysis within a political ecology framework. The methods for data collection included …
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Nuove tecniche per l'allevamento massale di Ditteri del genere Coenosia Meigen
… of the ‘tigrina group’ are naturally present in greenhouses, where they can establish for long periods. As their wide preys range includes important pests of protected crops, as Aleyrodidae, Sciaridae and Agromyzidae, Coenosia species are considered promising potential biological control agents. …
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Greenhouse Tomatoes: Process Simulation
… technology of significant interest is the use of greenhouses for food production. Greenhouses create a stable and adaptable environment for crops such as tomatoes to grow year-round. Fresh tomatoes are the second most consumed vegetable per capita in U.S. diets, currently averaging 20.7 pounds. …
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Advanced Energy Modelling and Life Cycle Assessment of Indoor Agriculture
… energy into the energy supplying systems of the greenhouses, a hybrid Solar Thermal/Photovoltaic-Battery Energy Storage (ST/PV-BES) system is modeled. Evaluation of the best configuration of photovoltaic (PV) and solar thermal (ST) modules, and battery energy storage (BES) size to have the …
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Evaluation of Passive Reduction of Salts and Nutrients from Greenhouse Effluent using Vegetated Bioreactors
… while recycling it for repeated irrigation in greenhouses could reduce costs and save on water and nutrient resources. However, the crop damage caused by the accumulated salinity in the recirculation systems is a major drawback to this otherwise sustainable practice. In this study, engineered …
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Air Circulation Under Reduced Atmospheric Pressures
… plant life in off-world, low pressure,</p> <p>greenhouses. The ability to control this process was limited by methodology and</p> <p>technology. Mathematical models, based on classical mechanics are created to enhance</p> <p>our control capabilities. Data is collected using various sensors …
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Soil microbial community structure and function of agriculturally used Mollisols in the periurban area around Buenos Aires, Argentina, with emphasis on pesticide and heavy metal contamination
… are conducted on open fields and under greenhouses, while also anthropogenically unaffected areas with soils representing a reference for natural soil condition still exist. The objectives of this dissertation were to examine whether inputs of pesticides and heavy metals cause soil …
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Quantifying How High Tunnels Create a Microclimate For Improved Crop Growth
… Basin are investing in inexpensive low-tech greenhouses, known as high tunnels (HTs) or hoop houses. This study evaluated the microclimate inside HTs, how farmers were using HTs to grow crops and how the microclimate inside HTs led to improved crop growth. The HT microclimate varied by …
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Investigation of air control on chunkwood combustor
Many small scale agricultural operations such as greenhouses, peanut drying and tobacco curing, use significant quantities of thermal energy. Direct combustion of biomass is a potential source of heat energy for those agricultural applications to substitute for the electricity or fossil fuels …
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Mercury Transportation in Soil Using Gypsum from Flue Gas Desulphurization Unit in Coal-Fired Power Plant
… <p>Recent studies have been carried out in greenhouses to investigate mercury transport in FGD gypsum treated soil. Major aspects include uptake of mercury by plants and emission of mercury into the atmosphere based on application rates of FGD gypsum. Additional aspects include rainfall, …
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