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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Influência do pólen sobre o desenvolvimento de colônias de abelhas africanizadas (Apis mellifera L.) / Influence of pollen on the Africanized bee colonies development (Apis mellifera L.)

Anna Frida Hatsue Modro 18 March 2011 (has links)
O conhecimento da qualidade do pólen apícola e a sua influência sobre o desenvolvimento de colônias pode contribuir, principalmente, para a melhoria da atividade apícola e para o controle de qualidade do pólen comercializado para o consumo animal e humano. O presente trabalho objetivou caracterizar o pólen quanto a origem botânica, determinar parâmetros físicoquímicos e, relacionar com o desenvolvimento de colônias de abelhas africanizadas (Apis mellifera L.), medido pelo tamanho da área ocupada com pólen, mel e cria dentro da colméia (cm²) e a assimetria flutuante das asas de abelhas operárias. O experimento de campo foi realizado no apiário do Departamento de Entomologia e Acarologia da Escola Superior de Agricultura Luiz de Queiroz em Piracicaba, SP, onde foram instaladas cinco colméias de A. mellifera com um coletor de pólen tipo frontal. As coletas foram realizadas nas quatro estações climáticas do ano: outono (02/abr. a 28/maio/2008), inverno (09/jul. a 03/set./2008), primavera (07/out. a 02/dez./2008) e verão (09/jan. a 06/mar./2009). O local de instalação do apiário apresenta domínio de vegetação de Floresta Estacional Semidecidual (Mata Atlântica), porém com amplas áreas antropizadas, onde existem cultivos agrícolas e canteiros ornamentais com árvores e ervas. Ao longo do ano foram encontrados 81 tipos polínicos nas cargas de pólen interceptadas, pertencentes a 32 famílias botânicas. Pão de abelhas apresentou 86 tipos polínicos, pertencentes a 34 famílias botânicas, sendo Fabaceae, Asteraceae e Malvaceae as famílias com maior freqüência de tipos polínicos ( 5 tipos polínicos) e, Myrtaceae, a família com alta freqüência de grãos de pólen. As médias anuais de matéria seca (67,41%), proteína bruta (27,02%), extrato etéreo (3,66%), matéria mineral (3,34%) e carboidratos totais (65,41%) de cargas e, matéria seca (78,80%) e proteína bruta (25,89%) de pão de abelhas estão de acordo com o regulamento técnico para comercialização do pólen no Brasil. A composição polínica apresentou relação com os valores de matéria seca (Piper sp. e Vernonia polyanthes), proteína bruta (Eucalyptus sp., Fabaceae tipo 2 e Myrcia sp.), extrato etéreo (Astrocaryum sp., Parthenium sp. e V. polyanthes), matéria mineral (Myrcia sp.) e, com carboidratos totais (Parthenium sp. e V. polyanthes). Proteína bruta e extrato etéreo tenderam em se relacionar com indivíduos mais simétricos. A área ocupada dentro da colméia esteve relacionada com a quantidade de pólen coletado, riqueza e equitabilidade da composição polínica (n=45; p-valor<0,05). Com base nos resultados obtidos, conclui-se que, as famílias botânicas Fabaceae, Asteraceae, Malvaceae e Myrtaceae são as mais importantes fontes poliníferas em Piracicaba. A origem botânica do pólen apícola tem efeito sobre a sua qualidade físico-química. Os valores de proteína bruta, extrato etéreo, quantidade de pólen coletado, riqueza e equitabilidade da composição polínica influenciam positivamente o desenvolvimento de colônias. / The knowledge of the apiarist pollen and its influence on the colonies development could contribute mainly for the improvement of the apiarist activity and for the quality control of the commercialized pollen for animal and human consumption. This assignment had as a goal to characterize the pollen in respect of the botanical origin, to determine physicochemical parameters and to relate it with the africanized bee colonies development (Apis mellifera L.), measured by the area size occupied with pollen, honey and breed inside the beehive (cm²) and the wings fluctuating asymmetry from the worker bees. The outside experiment was performed in the apiary of the Entomology and Acarology Department from the Agriculture College Luiz de Queiroz in Piracicaba, SP, where there were mounted five beehives of A. mellifera with a frontal pollen collector. The swabs were done in the four year seasons: fall (02/april to 28/may/2008), winter (09/july to 03/september/2008), spring (07/october to 02/december/2008) and summer (09/january to 06/march/2009). The apiary installation place presents predominance of Semidecidual Seasonal Forest vegetation (Atlantic Forest), but with wide cultivated areas, where it exist several agricultural crops and ornamental sites with trees and herbs. During the year, there were found 81 pollinical types in the intercepted pollen load, which belong to 32 botanical families. Bees bread presented 86 pollinical types, which belong to 34 botanical families, in that Fabaceae, Asteraceae and Malvaceae are the families with higher frequency of pollinical types ( 5 pollinical types) and, Myrtaceae, the family with high frequency of pollen seeds. The annual averages of dry matter (67.41%), crude protein (27.02%), ether extract (3.66%), mineral matter (3.34%) and total carbohydrates (65.41%) of loads and, dry matter (78.80%) and crude protein (25.89%) of bees bread are in accordance with the technical regulation for pollen commercialization in Brazil. The pollinical composition presented relation with the values of dry matter (Piper sp. and Vernonia polyanthes), crude protein (Eucalyptus sp., Fabaceae type 2 and Myrcia sp.), ether extract (Astrocaryum sp., Parthenium sp. and V. polyanthes), mineral matter (Myrcia sp.) and with total carbohydrates (Parthenium sp. and V. polyanthes). Crude protein and ether extract tended to relate to individuals more symmetrical. The area occupied within the hive was related to the amount of pollen collected, richness and evenness of pollen composition (n=45; p-value<0.05). According the results, it is concluded that the Fabaceae, Asteraceae, Malvaceae and Myrtaceae botanical families are the most important polliniferous sources in Piracicaba. The botanical origin of apiarist pollen has effect on its physicochemical quality. The values of crude protein, ether extract, collected pollen quantity, richness and evenness of pollinical composition have positive influence in the colonies development.
12

Wireless Beehive Monitoring : Using edge computing and TinyML to classify sounds

Holmgren, Mattias, Holmér, Elias January 2022 (has links)
As an essential and indispensable contributor to pollinating the world's crops and plants, the honey bee is key to the sustainability of humans' and our ecosystems' continued survival. Following in the footsteps of the companies TietoEvry and Beelabs project, this report also works towards monitoring bees during their daily activities. This project aims to investigate the feasibility of using wireless, battery-driven devices inside beehives to detect the sound of bees using machine learning for edge devices. Beelab has focused on measurements in and around the beehive regarding weight, temperature, barometric pressure and humidity. Sound analysis is still in its infancy with few finished working alternatives; therefore, this project will focus on the sound attribute by implementing machine learning and classification algorithms and applying it to a prototype—the progress is thoroughly documented in this report. The device records a snippet of sound and prepares to send it over a wireless transmission medium. By streamlining the code and optimizing the hardware, the device runs continuously for a month using a small, cheap battery.
13

Vertical Occupations in the city center of São Paulo

Vazquez, Lisandra January 2017 (has links)
Vertical Occupations in the City Center of São Paulo has been prepared as part of the Degree Project for the Master in Urbanism Studies course at The Royal Institute of Technology in Stockholm, Sweden.This Degree Project deals with social housing challenges in the central urban environment of São Paulo, Brazil, narrowing down to an important part of these urban challenges: the occupations of vacant buildings in the city center of São Paulo by social housing movements. Although the theme is part of a wider context, focusing on social occupations is critical to understand how the right to proper housing, and to the city itself, is a paradoxal universe. / Vertical Occupations in the City Center of São Paulo é um projeto de Mestrado (MSc) em Urbanismo preparado para Kungliga Tekninska Högskoloan (KTH) em Estocolmo. O trabalho lida com os desafios contemporâneos em habitação social, focando nas ocupações verticais no centro de São Paulo. Embora este tema seja bastante abrangente, ao focar em ocupações no centro da cidade, o projeto critica o direito à cidade e à habitação digna, focando na esfera mais carente da cidade, este expõe um universo um tanto quanto paradoxal.

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