Automating condition monitoring of vegetation on railway trackbeds and embankments

Vegetation growing on railway trackbeds and embankments present potential problems. The presence of vegetation threatens the safety of personnel inspecting the railway infrastructure. In addition vegetation growth clogs the ballast and results in inadequate track drainage which in turn could lead to the collapse of the railway embankment. Assessing vegetation within the realm of railway maintenance is mainly carried out manually by making visual inspections along the track. This is done either on-site or by watching videos recorded by maintenance vehicles mainly operated by the national railway administrative body. A need for the automated detection and characterisation of vegetation on railways (a subset of vegetation control/management) has been identified in collaboration with local railway maintenance subcontractors and Trafikverket, the Swedish Transport Administration (STA). The latter is responsible for long-term planning of the transport system for all types of traffic, as well as for the building, operation and maintenance of public roads and railways. The purpose of this research project was to investigate how vegetation can be measured and quantified by human raters and how machine vision can automate the same process. Data were acquired at railway trackbeds and embankments during field measurement experiments. All field data (such as images) in this thesis work was acquired on operational, lightly trafficked railway tracks, mostly trafficked by goods trains. Data were also generated by letting (human) raters conduct visual estimates of plant cover and/or count the number of plants, either on-site or in-house by making visual estimates of the images acquired from the field experiments. Later, the degree of reliability of(human) raters’ visual estimates were investigated and compared against machine vision algorithms. The overall results of the investigations involving human raters showed inconsistency in their estimates, and are therefore unreliable. As a result of the exploration of machine vision, computational methods and algorithms enabling automatic detection and characterisation of vegetation along railways were developed. The results achieved in the current work have shown that the use of image data for detecting vegetation is indeed possible and that such results could form the base for decisions regarding vegetation control. The performance of the machine vision algorithm which quantifies the vegetation cover was able to process 98% of the im-age data. Investigations of classifying plants from images were conducted in in order to recognise the specie. The classification rate accuracy was 95%.Objective measurements such as the ones proposed in thesis offers easy access to the measurements to all the involved parties and makes the subcontracting process easier i.e., both the subcontractors and the national railway administration are given the same reference framework concerning vegetation before signing a contract, which can then be crosschecked post maintenance.A very important issue which comes with an increasing ability to recognise species is the maintenance of biological diversity. Biological diversity along the trackbeds and embankments can be mapped, and maintained, through better and robust monitoring procedures. Continuously monitoring the state of vegetation along railways is highly recommended in order to identify a need for maintenance actions, and in addition to keep track of biodiversity. The computational methods or algorithms developed form the foundation of an automatic inspection system capable of objectively supporting manual inspections, or replacing manual inspections.

Housing development in Latin America and the Caribean, its measuring and its determinants

This text briejly describes the Housing Development lndex (HDI). Following a concise introduction on the reasons for this research, HDI's methodology, characteristics, properties and databases supporting its calculation are discussed. Next, the third part presents, analyzes and compares the HDI's figures for Brazil and some other Latin American countries. The part that follows shows HDI figures for all states in Brazil and points out the regional differences and the indicator 's recent growth. Then, this paper analyses the injluence of some social and economic variables on the HDI and, finally, it makes some considerations on HDI.

Analysis of the restructuring of the Russian defence industry (by the example of aviation industry and knaapo) and the creation of United Aviation Construction Corporation

The present study is focused on the analysis of the three main governmental measures occurred in 2000-2006 in Russian defense industry: the creation of the holding structures, the establishing of the state monopoly in arms export, and creation of the United Aviation Construction Corporation (Ob¿edinennaya Aviastroitel¿naya Corporatziya), which was initiated by the President and Government of Russian Federation in 2006. The last project assumes the consolidation and joining of all producers of civil and military aviation into one united corporation in order to save the technological and productive potential of the sector after serious crisis in 1990-s. On the other hand, this project can be considered as one of the measures to establish state control and hierarchy in the defense industry. The current project tries to analyze the necessity and the possible impacts of restructuring processes. In order to perform such analysis, I need to observe the evolution of the sector, which involves the description of the restructuring and reforming of the industry since the disintegration of the Soviet Union. The current situation in aviation sector was shaped by number of reforms performed by Government of Russian Federation, which I describe in phases: conversion, privatization, decentralization, followed by evident desire of the state to establish control over some companies. Later on, I am trying to understand the reasons lying behind all reforms of 2000-2006 and the integration of the industry. I also try to predict which impacts on the companies it will have. The last part presents the main conclusions of the paper.

Estimating and forecasting the volatility of Brazilian finance series using arch models (Preliminary Version)

The goal of this paper is to present a comprehensive emprical analysis of the return and conditional variance of four Brazilian …nancial series using models of the ARCH class. Selected models are then compared regarding forecasting accuracy and goodness-of-…t statistics. To help understanding the empirical results, a self-contained theoretical discussion of ARCH models is also presented in such a way that it is useful for the applied researcher. Empirical results show that although all series share ARCH and are leptokurtic relative to the Normal, the return on the US$ has clearly regime switching and no asymmetry for the variance, the return on COCOA has no asymmetry, while the returns on the CBOND and TELEBRAS have clear signs of asymmetry favoring the leverage e¤ect. Regarding forecasting, the best model overall was the EGARCH(1; 1) in its Gaussian version. Regarding goodness-of-…t statistics, the SWARCH model did well, followed closely by the Student-t GARCH(1; 1)

Why merger talks collapse: an exploratory study about contributing factors to ‘wedding cold feet' and deal making failure in mergers and acquisitions from the perspective of active deal making professionals in Brazil

Why merger talks collapse: an exploratory study about contributing factors behind ‘wedding cold feet' and deal making failure in Mergers and Acquisitions from the perspective of active deal making professionals in Brazil. One basic question encouraged this study: after all the effort, expectations and money usually invested in dealmaking, why are so many transactions simply abandoned, even when the benefits are clear for the business, shareholders, customers and employees?

Construção de vínculos de confiança empresarial

O trabalho apresentado neste relatório tem por objetivo pesquisar a constituição e o desenvolvimento da confiança entre os empresários participantes do programa Cooperar para Competir, o qual compõe o conjunto de treinamentos oferecidos para o Arranjo Produtivo Local de Birigui pelo SEBRAE-SP em parceria com instituições locais como o Sindicato da Indústrias do Calçado e Vestuário de Birigui, o SESI de Birigui, entre outros. Em termos de metodologia, foi escolhido o método qualitativo para desenvolver uma pesquisa exploratória de estudo de caso (o Cooperar para Competir) e foram utilizadas duas técnicas de pesquisa – a entrevista aberta ou não-dirigida e a técnica de história oral. Para o seu desenvolvimento, foram estabelecidas três grandes áreas de investigação que, juntas, ofereceriam uma visão abrangente do tema analisado: a) a primeira grande área é responsável pelo estudo do contexto e da estrutura econômica do APL em geral, bem como de seus agentes presentes naquela região e suas particularidades. Nesta primeira parte são apresentadas discussões sobre clusters, sua importância e representatividade no Brasil e no mundo, bem como uma análise do cluster calçadista de Birigui de acordo com o Modelo Diamante proposto por Porter (1999); b) a segunda área abrange tanto a estrutura formal do Cooperar para Competir em cada uma das turmas quanto o processo dinâmico do curso, seus momentos críticos e as estratégias pedagógicas adotadas a cada momento em vista dos desafios. Esta parte contextualiza o programa, apresenta sua estrutura e reflete a construção das bases de cooperação em sala de aula por uma perspectiva axiológica; c) a terceira área, por fim, é caracterizada pela pesquisa de campo, quando foram investigadas as vivências, experiências e impactos dos e nos participantes do ponto de vista subjetivo e como eles entenderam os efeitos em suas vidas profissional e pessoal. As entrevistas abertas foram realizadas com dois grupos de participantes, o Grupo Graduado e o Grupo Novo, a fim entender o desenvolvimento de ambos os grupos, os resultados alcançados pelo primeiro e o efeito da suspensão do programa no segundo. Todo o processo seguido durante a pesquisa permitiu que se chegasse a inúmeras conclusões, como o porquê do sucesso do programa Cooperar para Competir – o sucesso, neste caso, reside no desenho pedagógico que atende a dimensão axiológica, ou seja, não apenas se falou de cooperação, mas se produziu cooperação ao integrar competências, interesses e valores. O programa serviu, então, como um espaço filosófico e laboratorial. Assim, o conteúdo e a sequência seguidos também tem sua importância relativizada frente as relações e a construção de algo que transcende o caráter utilitarista ou funcionalista das disciplinas. As entrevistas individuais e em grupo mostraram que se reconhecerem como iguais foi um fator gerador de confiança entre os participantes, a qual também é expressa quando estes se abrem para compreenderem o modo como os outros atribuem significados para a relação de desconfiança e confiança e passam a estabelecer um sistema de significação comum. Além disso, a consciência de sua realidade e o reconhecimento de sua responsabilidade junto a si mesmo, à sua empresa, ao projeto desenvolvido no Cooperar para Competir e à comunidade de Birigui marcam, também, a mudança do esquema mental de sapateiro para empresário.

Assessment of the ergonomic design of diagnostic ultrasound transducers through wrist movements and subjective evaluation

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Aspectos clínico e cirúrgicos do tumor mamário canino: clinical and surgical evolution

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Histopathological and histomicrobiological study of root canal therapy medication, comparison of calcium hydroxide versus gutta-percha with zinc oxide/eugenol in the teeth of dogs

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Infectious bronchitis virus: detection and vaccine Strain differentiation by semi-nested RT-PCR

A semi-nested reverse transcription-polymerase chain reaction (Semi-N-RT-PCR) was developed and used to detect the S glycoprotein gene of infectious bronchitis virus (IBV) strains and to discriminate H120 vaccine strain from other strains. Viral RNA was extracted from the allantoic fluid of chicken embryos and from tissues of chickens experimentally infected with different strains of IBV. Amplification and identification of the viral RNA was performed using two sets of primers complementary to a region of the S glycoprotein gene in the Semi-N-RT-PCR assay. The pair of primers used in the first PCR consisted of universal oligonucleotides flanking a more variable region of S1-S2 gene. The second primer pair was used in the Semi-N-RT-PCR and was comprised of one of the primers from the first universal pair together with either another universal internal oligolucleotide or a oligonucleotide sequence specific for the H120 strain of IBV. The universal primers detected all reference IBV strains and field isolates tested herein. The Semi-N-RT-PCR had high sensitivity and specificity, and was able to differentiate the H120 vaccine strain from other reference IBV strains; including M41 strain. All tissue samples collected from chickens experimentally infected with H120 or M41 strains were positive in the semi-nested RT-PCR using universal primers, while only the H120-infected tissue samples were amplified by the set of primers containing the H120-oligonucleotide. In conclusion, the ability of Semi-N-RT-PCR to detect distinct IBV strains and preliminarily discriminate the vaccine strain (H120) closes a diagnostic gap and offers the opportunity to use comprehensive PCR procedures for the IBV diagnosis.

Antigenic characterization of Trypanosoma evansi using sera from experimentally and naturally infected bovines, equines, dogs, and coatis

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Soil, water and nutrient losses by interrill erosion from green cane cultivation

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Application of chemometric methods in the evaluation of chemical and spectroscopic data on organic matter from Oxisols in sewage sludge applications

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Genetic associations of sexual precocity with growth traits and visual scores of conformation, finishing, and muscling in Nelore cattle

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Secagem do resíduo industrial da acerola em leito de jorro: estudos fluidodinâmicos e análise do desempenho do secador

In this research, the drying process of acerola waste was investigated by using a spouted bed drier. The process was conducted using high density polyethylene inert particles with the objective of producing an ascorbic acid-rich final product. The fruit waste was ground and used to prepare different water-maltodextrin suspensions. Initially, fluidynamical experiments were conducted in order to evaluate the feeding effect on the spouted bed drier fluidynamics behavior. The experimental planning 23 + 3 was used to investigate the effect of the following variables: solids concentration, drying air temperature, intermittence time, production efficiency, solids retention and product losses by elutriation of fine particles on drier walls. The effect of selected independent variables on the drier stability was also evaluated based on a parameter defined as the ratio between the feed suspension volume and the total inert particles volume. Finally, the powder quality was verified in experiments with fixed feed flow and varying air drying temperature, drying air velocity and intermittence time. It was observed that the suspension interferes in the spouted bed drier fluidynamics behavior, and higher air flow is necessary to stabilize the drier. The suspension also promotes the expansion of the spouted bed diameter, decreases the solid circulation and favors the air distribution at the flush area. All variables interfere in the spouted bed performance, and the solids concentration has a major effect on the material retention and losses. The intermittence time also has great effect on the stability and material retention. When it comes to production efficiency, the main effect observed was the drying air temperature. First order models were well adjusted to retention and losses data. The acerola powder presented ascorbic acid levels around 600 to 700 mg/100g. Similar moisture and ascorbic acid levels were obtained for powders obtained by spouted bed and spray drier. However, the powder production efficiency of the spray drier was lower when compared to spouted bed drier. When it comes to energetic analysis, the spray drier process was superior. The results obtained for spouted bed drier are promising and highly dependent on the operational parameters chosen, but in general, it is inferred that this drying process is adequate for paste and suspension drying