Dissertations / Theses on the topic 'Agriculture connectée'
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Bouyedda, Abdellatif. "Optimisation de la chaîne de transmission radio en bande ISM pour des applications IoT, notamment en agriculture connectée." Electronic Thesis or Diss., Limoges, 2024. http://www.theses.fr/2024LIMO0116.
Full textThis thesis examined innovative solutions to optimize the connectivity and performance of connected objects, particularly focusing on connected agriculture, where ensuring connectivity is crucial. By analyzing LPWAN and satellite technologies, we demonstrated that hybrid connectivity represents a promising approach to covering white zones, especially in isolated rural areas. A satellite communication antenna prototype was designed to ensure effective reception with the Kinéis constellation, while a frequency-reconfigurable antenna was developed to facilitate flexible communications between terrestrial and satellite networks. Additionally, the enhancement of a TPMS system, specifically aimed at agricultural machinery, significantly increased the sensitivity and robustness of the system, thus meeting the requirements of applications in challenging environments. Despite certain challenges related to manufacturing complexity, this research lays a solid foundation for IoT solutions tailored to the specific needs of connected agriculture and opens perspectives for other sectors requiring coverage in remote areas
Leca, Dimitri. "Navigation autonome d'un robot agricole." Thesis, Toulouse 3, 2021. http://www.theses.fr/2021TOU30036.
Full textThis thesis explores the field of agricultural robotics. It aims at developing navigation strategies allowing a mobile robot to navigate safely and autonomously inside a farm. This kind of agricultural environment is highly evolutive and includes many static obstacles (buildings, storage areas, etc.) and dynamic obstacles (cars, agricultural machines, human operators, animals, etc.). The proposed navigation strategy must therefore be both reactive and adaptive. Consequently, this thesis focuses on the design of sensor-based navigation methods (LiDAR, vision, ...) and obstacle avoidance techniques in static but also highly dynamic environments. Due to the diversity of environments and possible cases, we have developed methods that are as generic as possible, able to handle both static and dynamic cases. Thus, we will first introduce the spirals, which allow to obtain relevant and flexible avoidance trajectories. Then, we will present our method of navigation and obstacle avoidance, based on a dynamic parametrization of the spirals according to the evolution of the environment. We will show that due to the generic aspect of spirals, this method can be easily adapted to avoid both static and dynamic obstacles. Finally, these solutions will be first validated in simulation, then implemented on a mobile robot for experiments in real conditions
Nguyen, Quang-Duy. "Interoperability and Upgradability Improvement for Context-Aware Systems in Agriculture 4.0." Thesis, Université Clermont Auvergne (2017-2020), 2020. http://www.theses.fr/2020CLFAC017.
Full textThe next evolution of agriculture is Agriculture 4.0. Agriculture 4.0 is about using technologies ofthe Internet of Things (IoT) and Context-Aware Systems (CASs) to increase the performance offarming activities. A CAS can react automatically and adequately to the environment based onits context. Applying CASs in agriculture can reduce farm labor and increase the precision offarming activities. However, it encounters two challenges specific to agriculture. The firstchallenge relies on the need to upgrade a CAS regularly with new computing devices orsoftware programs without changing its functionality. Indeed, natural factors, such as violentweather and wild animals, can damage the computing devices located on farmland. Moreover,after each farming season, farmers may need to upgrade their system with new computingdevices and software programs. The second challenge is the data heterogeneity generated froma CAS. In agriculture, various phenomena involve the need to have different sensor devices thatmake numerous types of measurements and produce heterogeneous data. Representing all ofthese heterogeneous data is necessary for the interoperability of different computing devices ina CAS or the interoperability between different CASs in the IoT ecosystem. This thesis proposesthree contributions. The first contribution addresses the first challenge. It is a new architecturebased on the microservice mindset that allows system developers to focus on the services’goals rather than the computing devices and software programs of a CAS. This newarchitecture is called the stack of services for CASs. The second contribution addresses thesecond challenge. It is a new ontology for CASs named CASO. The ontology provides avocabulary to model heterogeneous data generated from CASs and embodies a mechanism tomake rules for reasoning. The third contribution is to build a decision support system (DSS) forthe irrigation CAS in the research unit TSCF, INRAE. The design of the DSS relies on the stackof services for CASs. Moreover, the DSS uses a new ontology called IRRIG, a specialization ofCASO for irrigation. The DSS is an automation version of the manual irrigation methodIRRINOV®. All the guidelines for farmers in IRRINOV® are transformed into rules for reasoning.The contributions of this thesis are going to be applied to build a smart irrigation CAS deployedin AgroTechnoPôle, located in Montoldre, France
Mohammad, Ammad Uddin. "UAV Routing Protocol (URP) for crop health management." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0147/document.
Full textWireless sensor networks are now a credible means for crop data collection. The installation of a fixed communication structure to relay the monitored data from the cluster head to its final destination can either be impractical because of land topology or prohibitive due to high initial cost. A plausible solution is to use Unmanned Aerial Vehicles (UAV) as an alternative means for both data collection and limited supervisory control of sensors status. In this paper, we consider the case of disjoint farming parcels each including clusters of sensors, organized in a predetermined way according to farming objectives. This research focuses to drive an optimal solution for UAV search and data gathering from all sensors installed in a crop field. Furthermore, the sensor routing protocol will take into account a tradeoff between energy management and data dissemination overhead.The proposed system is evaluated by using a simulated model and it should find out a class among all under consideration
Gnanguenon, guesse Girault. "Modélisation et visualisation des liens entre cinétiques de variables agro-environnementales et qualité des produits dans une approche parcimonieuse et structurée." Electronic Thesis or Diss., Montpellier, 2021. http://www.theses.fr/2021MONTS139.
Full textThe development of digital agriculture allows to observe at high frequency the dynamics of production according to the climate. Data from these dynamic observations can be considered as functional data. To analyze this new type of data, it is necessary to extend the usual statistical tools to the functional case or develop new ones.In this thesis, we have proposed a new approach (SpiceFP: Sparse and Structured Procedure to Identify Combined Effects of Functional Predictors) to explain the variations of a scalar response variable by two or three functional predictors in a context of joint influence of these predictors. Particular attention was paid to the interpretability of the results through the use of combined interval classes defining a partition of the observation domain of the explanatory factors. Recent developments around LASSO (Least Absolute Shrinkage and Selection Operator) models have been adapted to estimate the areas of influence in the partition via a generalized penalized regression. The approach also integrates a double selection, of models (among the possible partitions) and of variables (areas inside a given partition) based on AIC and BIC information criteria. The methodological description of the approach, its study through simulations as well as a case study based on real data have been presented in chapter 2 of this thesis.The real data used in this thesis were obtained from a vineyard experiment aimed at understanding the impact of climate change on anthcyanins accumulation in berries. Analysis of these data in chapter 3 using SpiceFP and one extension identified a negative impact of morning combinations of low irradiance (lower than about 100 µmol/s/m2 or 45 µmol/s/m2 depending on the advanced-delayed state of the berries) and high temperature (higher than about 25°C). A slight difference associated with overnight temperature occurred between these effects identified in the morning.In chapter 4 of this thesis, we propose an implementation of the proposed approach as an R package. This implementation provides a set of functions allowing to build the class intervals according to linear or logarithmic scales, to transform the functional predictors using the joint class intervals and finally to execute the approach in two or three dimensions. Other functions help to perform post-processing or allow the user to explore other models than those selected by the approach, such as an average of different models.Keywords: Penalized regressions, Interaction, information criteria, scalar-on-function, interpretable coefficients,grapevine microclimate
Durant, Valerie A. "Sustainable urban agriculture and forestation : the edible connected city." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/26246.
Full textDissertation (MTRP)--University of Pretoria, 2012.
Town and Regional Planning
unrestricted
Reda, Ali. "A multiscale mechanical study of flax stems and fibres for the development of an in-the-field tool capable of predicting optimum retting." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILN055.
Full textAgriculture 4.0, also known under several aliases such as ‘digital agriculture', ‘smart farming', and ‘e-farming' is currently developing rapidly in terms of research, development, and commercial applications. As with Agriculture 1.0, 2.0, and 3.0, the objective of Agriculture 4.0 is the use of technology to improve all areas of agriculture. In Agriculture 4.0 it is the application of microelectronics and microtechnologies. Unlike before, these technologies bring things such as the internet-of-things, big data, telecommunications, novel sensing, rapid feedback, data analysis, connectivity, artificial intelligence etc. In principle, all these areas should result in a massive modernization of farming in terms of organisation, yield, efficiency, and quality of produce. However, Agriculture 4.0 is so vast that if one is to contribute to it, even in a minor way, one has to choose a specific area to contribute. The area chosen for the study in this PhD was flax fibre production. Flax fibres are naturally strong fibres which can be extracted from flax stems. The flax stems have evolved to have robust micrometre-diameter fibres running the length of the outside of the stem, and held in place in the external tissue of the stem. Once extracted and isolated, flax fibres have numerous applications ranging from textiles to composite materials. In order to facilitate the mechanical extraction of flax fibres from their parent stems, the stems undergo a process known as ‘retting'. Retting leads to the breakdown of the external tissue between the fibres. A common form of retting is known as ‘dew retting'. In dew retting, natural processes such as bacteria and fungi result in enzymes which break down the middle lamella and gradually separate fibre bunches and fibres from bunches. The length of dew retting depends heavily on the weather. Too little retting results in difficult fibre extraction in the factory, too much retting can result in a compromise in fibre quality. It has long been known that there is an optimum retting point-even the ancients knew this. Certain skilled artisan farmers are able to judge this point via a combination of manual manipulation of the stems, observation of damage caused to the external tissue via this manoeuvre, and also observing the colour and the smell of the stems during this very skilled, but artisanal, testing. It is clear that the artisan is performing rudimentary laboratory tests quite literally ‘in-the-field'. It would seem logical therefore to try to quantify such tests and see if a reliable tool can be made to help the artisan. And indeed, this is exactly what others have attempted. The introduction of the PhD gives examples of attempts to make optimal-retting tools in the 1980s and after. Inspired by this early work, the work of this PhD attempts a full multiscale mechanical characterization of flax stems and fibres during a retting cycle (summer 2022) and, somewhat ambitiously, performed in real time-to our knowledge for the first time. The mechanical characterization involved macroscopic mechanical tests (bending, crushing, and twisting), as well as novel microscopic mechanical testing of single flax fibres using novel methods inspired by MEMS. In addition, the nanoscopic mechanical properties of the primary cell wall of retting flax fibres was characterised using nanoindentation AFM. As the experimental work, analysis via analytical modelling, and interpretation descends in scale from macro, through micro, to nano, we learn a little more of how the retting affects the stems, their properties, and their fibres. In addition to simply learning, a very positive outcome of the PhD is that one is able to suggest a mechanically-induced damage mechanism in stems which could be the basis for a tool. One can note however, that the uncontrollable multiparameter nature of the subject, e.g. the weather, means that several studies would be needed to confirm beyond doubt observations from a single retting cycle
Bellón, de la Cruz Beatriz. "Une approche multiscalaire par télédétection pour la cartographie et la caractérisation des systèmes agricoles à l’échelle régionale." Thesis, Paris, AgroParisTech, 2018. http://www.theses.fr/2018AGPT0002.
Full text: In a context of regional land-use planning, agricultural systems’ mapping - crop types and cropping practices – allows monitoring of what is being produced, where and how, and therefore represents a key element for regional assessment of the agricultural production and its environmental impact. The production of information on agricultural systems generally requires a lot of data and expertise. This information is thus very heterogeneous in quantity and quality in space and time, the availability and updates being extremely variable between countries and regions. Remote sensing, through its ability to retrieve synoptic spatial information on the state and dynamics of vegetation from satellite images, represents a valuable tool for agricultural monitoring. However, the conversion of images into regional-scale map products remains a field of research for many applications. This thesis presents original methodological developments in a semi-automatic multiscale approach based on the processing and analysis of optical satellite imagery for the mapping and characterization of agricultural systems at regional scale. The approach is composed of two main methods: (i) regional stratification into landscape units and classification of these units to produce a map of agricultural land-use systems; (ii) field-level segmentation and unsupervised classification of the segments by a “landscape-clustering” method to produce a cropping systems’ map. The methods were developed on a region of intensive agriculture, the Brazilian state of Tocantins, where the cultivated area, as well as the main agricultural land-use systems and cropping systems were successfully mapped from an annual NDVI-MODIS time series and a mosaic of Landsat images. The reproducibility of the approach was then assessed in Burkina Faso, where landscapes are shaped by the smallholder agriculture. Only the cultivated area could be mapped with satisfactory results, highlighting the limitations of these methods and the current offer in satellite imagery given the challenging specificities of this type of agriculture for remote sensing. The resulting maps were assessed with ground-truth data and agricultural statistics, and compared to other existing maps. The results of this thesis show the potential of the new method of regional stratification into landscape units which, based on NDVI time series and combined to the unsupervised “landscape-clustering” classification method, contributes to significantly improve discrimination of crop types and agricultural practices, and allows representing the agricultural systems at different levels of spatial organization. The originality of the developed methods lies mainly in the simplicity of their implementation. They are almost exclusively based on satellite data and require little “expert” intervention and external data, which gives them a high reproducibility potential. Thereupon, this thesis contributes, with these novel methods, to the development of generic tools to support large-scale monitoring of agriculture and to provide decision-support products for reasoned land-use planning
Diebel, Matthew Whitney. "Prioritizing stream restoration in agricultural landscapes." 2008. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textContreras-Moreno, Nancy. "Agricultural technology transfer : assessing 60 years of experiences in Mexico /." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textBennett, Elena Michele. "Patterns of soil phosphorus : concentrations and variability across an urbanizing agricultural landscape /." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textWood, Eric C. "Modeling and characterizing agricultural expansion : a case study in Senegal, West Africa /." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textForbes, Katherine Janet. "Movement and population dynamics of two ladybeetle (Coleoptera: Coccinellidae) species in agricultural crops." 2008. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textQuesada, Evelyn. "Moving towards food sovereignty: creating a connected, fair and sustainable food system in Winnipeg through productive urban landscapes." 2014. http://hdl.handle.net/1993/23275.
Full textNunes, Carolina Lopes. "Innovative business plan: online platform that connects the small farmers to consumers." Master's thesis, 2021. http://hdl.handle.net/10071/23100.
Full textO presente projeto teve como objetivo a apresentação de um plano de negócios para a criação de uma plataforma online que permita aos consumidores adquirir produtos hortícolas, produzidos através de práticas sustentáveis, por pequenos agricultores locais. Foi feita uma análise de mercado junto dos potenciais consumidores para avaliar o seu interesse em adquirir estes produtos e, junto dos pequenos agricultores, para avaliar o seu interesse em vender os seus produtos através da plataforma. Por último, foi ainda realizada uma análise à concorrência a fim de perceber se esta atividade apresenta atualmente um volume de vendas que permita a viabilidade económica e financeira do projeto. Da análise realizada, foi possível concluir que (1) há crescimento na procura por produtos hortícolas produzidos através de práticas sustentáveis; (2) que há interesse em adquirir produtos produzidos por pequenos agricultores locais, como forma de ajudar a economia local; (3) que esta crescente procura não é acompanhada por crescentes vendas, uma vez que o acesso a estes produtos não é facilitado. A conjugação destas 3 conclusões criou uma oportunidade de negócio para dar início ao projeto. Para dar início a este projeto será necessário um investimento inicial de 31.100€, destinado maioritariamente à criação e desenvolvimento da plataforma online. De acordo com a análise financeira do projeto, foi possível concluir que este é economicamente e financeiramente viável, com VAL de 9.860.245€, TIR de 417.34% e um período de recuperação de investimento de 2 anos.
Cardille, Jeffrey A. "Characterizing patterns of agricultural land use in Amazonia by merging satellite imagery and census data." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textMize, Ronald L. "The invisible workers : articulations of race and class in the life histories of braceros /." 2000. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textRenfrew, Rosalind B. "The influence of patch and landscape characteristics on grassland passerine density, nest success, and predators in southwestern Wisconsin pastures." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textMuangprom, Amorntip. "A novel dwarfing mutation in a "Green Revolution" gene in Brassica rapa : its role in the gibberellin pathway and its potential use in agriculture /." 2004. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textWelsh, Margaret O. "Management of mountain forest and pasture resources in Albania : local control and tenure security in a post reform economy /." 2001. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textKamarainen, Amy Marie. "Long-term trends in aquatic pollutants : chloride and phosphorus dynamics in lakes embedded in urban and agricultural watersheds /." 2009. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textBarquero, Francisco. "Identifying successful participation in women's lending groups in Nicaragua's agricultural frontier : the community bank "hand-in-hand" in Waslala, Nicaragua /." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.
Full textPeng, Tingjun. "A study of imperfect competition of the Asian dairy markets : the impacts of DOHA round agricultural negotiations and further trade liberalization /." 2006. http://www.library.wisc.edu/databases/connect/dissertations.html.
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