https://repositorio.ufms.br/handle/123456789/52 Thu, 23 Jul 2026 01:19:04 GMT 2026-07-23T01:19:04Z https://repositorio.ufms.br/handle/123456789/14620 Título: Sexagem de Aves Utilizando Espectroscopia no Infravermelho por Transformada de Fourier e Machine Learning Abstract: Early identification of sex in birds plays a crucial role in reproduction, breeding, commercialization, and scientific knowledge production. DNA-based molecular techniques have been the primary approach for sex determination, distinguished by their accuracy and risk-free nature for the bird, but they face challenges related to time consumption, costs, and the need for specialized laboratories. This study investigates the application of Fourier Transform Infrared Spectroscopy (FTIR) combined with machine learning algorithms as a non-invasive and precise technique for early sex determination in birds, through measurements made in a feather region known as the vexil. The research focuses on four species: Oryzoborus maximiliani (Bicudo), Nymphicus hollandicus (Cockatiel), Oryzoborus angolensis (Curió), and Psittacula krameri (Ring Neck). The methodology involved collecting feather FTIR spectra from young birds (sex confirmed by DNA analysis) using the Attenuated Total Reflectance (ATR) accessory. Spectra obtained in the range of 3800 to 800 cm⁻¹ were processed using Standard Normal Variate (SNV) and subjected to Principal Component Analysis (PCA) to reduce dimensionality and identify significant variables. The combination of FTIR with the Random Forest classifier demonstrated promising results. Significant accuracies were obtained in the identification of bird sex, with emphasis on Bicudo and Curió (94.4%), Cockatiel (77,8%) and Ring Neck (72,2%). In this way, the study shows great potential for application in avian sexing and indicates the need for additional studies to allow its generalized application in certain species. Tipo: Tese Fri, 15 May 2026 00:00:00 GMT https://repositorio.ufms.br/handle/123456789/14620 2026-05-15T00:00:00Z https://repositorio.ufms.br/handle/123456789/14607 Título: Tecnologias Governamentais aplicadas a gestão pública no agronegócio Abstract: This thesis investigates the application of governmental technologies (Govtechs) in public management of the agribusiness sector, with a focus on urban agriculture as a strategic axis for sustainable public policies. The research begins with an international bibliometric analysis of the Govtech concept, highlighting its recent growth and the gaps in the literature regarding its application to the agricultural sector. Subsequently, a survey is conducted on digital technologies and geotechnologies aimed at public agribusiness management, both in Brazil and abroad, revealing opportunities for governmental innovation. As a case study, the urban agriculture policy of the Municipality of Campo Grande (MS) is analyzed, characterizing its productive units and emphasizing their role in food security, sustainable land use, and social inclusion. Based on the identified practical demands, a technological solution is developed using artificial intelligence: the YOLOv8 model, trained to automatically detect urban gardens through georeferenced imagery. Based on the results obtained, an integrated Govtech application is proposed and developed, aimed at public agencies, bringing together tools for registration, monitoring, geographic visualization, and decision-making support. This thesis contributes to the fields of environmental technologies and public policy by proposing pathways for modernizing management in agribusiness. Tipo: Tese Wed, 01 Jan 2025 00:00:00 GMT https://repositorio.ufms.br/handle/123456789/14607 2025-01-01T00:00:00Z https://repositorio.ufms.br/handle/123456789/14432 Título: (RE)EXISTIR, SUBVERTER E (DES)CONSTRUIR: A literatura afro-diaspórica como dispositivo de Formação Cultural Contextual e resistência Abstract: This doctoral dissertation, developed within the Research Group Formação e Cultura na Sociedade Contemporânea (EduForP/UFMS–CNPq), investigates Afro-diasporic literature as a field of formation, memory, and (re)existence. Grounded in Critical Theory and Decolonial Thought, it revisits the notion of Bildung (Adorno 1995; Horkheimer 1944; Marcuse 1973), understood as a Eurocentric formative ideal that, under the logic of instrumental reason, universalized a particular model of subject while producing racial, epistemic, and ontological exclusions. In response, the research proposes the concept of Cultural Contextual Formation (Formação Cultural Contextual – FCC), defined as an ethical, aesthetic, and political process of reconstructing humanity in contexts marked by colonial trauma and systemic racism. The FCC is structured upon the interrelation between body, ancestry, orality, and insurgent memory, promoting a form of learning based not on assimilation but on rootedness and critical listening. Drawing from thinkers such as Frantz Fanon (1952/2008), Lélia Gonzalez (1988), bell hooks (1994), Stuart Hall (1997), Catherine Walsh (2009), Achille Mbembe (2017), and Walter Mignolo (2003), this dissertation articulates a decolonial epistemological shift that conceives formation as an act of rehumanization and re-existence. Within this horizon, the study develops the Diasporic Psychic Dialectics (D.P.D.), a methodological approach that interweaves the psychic, political, and aesthetic dimensions of the Black experience. Inspired by Freud (1915; 1923), Fanon (1952/2008), and Kilomba (2008), the D.P.D. operates as a practice of listening and interpretation oriented toward symbolic elaboration of trauma and restitution of diasporic subjectivity. The work Plantation Memories (Kilomba 2008) occupies a methodological place of emergence in this construction, providing the epistemological ground for such practice of listening. The literary analyses focus on Beloved (Morrison 1987) and Torto Arado (Vieira Junior 2019), which, in different historical and aesthetic contexts, elaborate the pain and resistance of Black bodies, transforming literature into a territory of formation and symbolic healing. These narratives reveal that Afro-diasporic writing not only denounces the violences of modernity but also produces epistemologies rooted in ancestry and the circularity of time.The dissertation concludes that Cultural Contextual Formation, articulated with the methodological listening of the Diasporic Psychic Dialectics, offers the field of Education a new formative grammar: situated, insurgent, and reparative. By recognizing literature as a locus of thought, memory, and transformation, this study reaffirms the power of the word as a technology of rehumanization and a political practice of (re)existence. Tipo: Tese Wed, 01 Jan 2025 00:00:00 GMT https://repositorio.ufms.br/handle/123456789/14432 2025-01-01T00:00:00Z https://repositorio.ufms.br/handle/123456789/14408 Título: Influência dos Parâmetros de Anodização no Crescimento de Nanotubos de TiO2 Visando Sua Aplicação na Fotodegradação de Contaminantes Orgânicos Abstract: Titanium dioxide (TiO2) is a semiconductor with a prominent position for various applications, mainly due to its chemical stability, non-toxicity, biocompatibility, and environmental friendliness. Among these applications, photocatalytic processes for the degradation of organic compounds and energy storage through the production of green hydrogen stand out. However, despite its promise, many research groups are still seeking to optimize its properties in order to enhance the photocatalytic properties of TiO2 and make its production method simple, inexpensive, and environmentally viable. In this sense, scaling up materials from bulk to nanostructures represents a significant increase in the photocatalytic efficiency of TiO2, as it provides more adsorption/reactive sites and transport pathways. Within this context, this work presents a systematic study of the growth mechanisms of titanium nanotubes (TNTs) using the anodic oxidation technique. For this purpose, metallic titanium (Ti) plates were used as anodes and a metallic copper (Cu) plate as cathodes. Ammonium fluoride (NH4F) solution was used as the electrolyte. Voltages of 10V, 20V, and 30V were used, and anodizing times of 30 min, 60 min, and 120 min were applied. During electrocorrosion, the electrolyte was kept under magnetic stirring and at room temperature by a water cooling system. The distance between the electrodes was kept fixed at 0.5 cm in all electrocorrosions. Once the process was finished, the samples were subjected to heat treatment in a tubular furnace for 2 hours at 450ºC, with a ramp of 5ºC/min, at ambient pressure. The properties of the non-woven fabrics (NTF) were studied by X-ray diffraction, Raman scattering, and Scanning Electron Microscopy. Finally, the photocatalytic properties of the TNTs were evaluated by photodegradation tests of methylene blue dye using a UV light source, which showed greater effectiveness in samples anodized for 60 min at 30 V. Tipo: Dissertação Thu, 01 Jan 2026 00:00:00 GMT https://repositorio.ufms.br/handle/123456789/14408 2026-01-01T00:00:00Z