The intent of this study was to monitor the effect of Canadian winter commercial transport conditions on animal outcomes. A methodology was developed to measure acceleration on trailers transporting cull cows and a preliminary comparison of acceleration and carcass bruising revealed that further study of the relationship was warranted. The accelerometer methodology was used as one tool to examine factors influencing internal trailer microclimate and trailer acceleration on shrink, and severe bruising in finished cattle. This research has improved our understanding of Canadian winter transport conditions affecting finished cattle and demonstrated that there is a relationship between vertical rms of acceleration (P=0.0025), beta agonist use (P=0.0323), total wait time (P=0.0052) and the two way interaction of carcass position and yield score (P=0.0025) with cattle bruising. It also demonstrated that there is a relationship between journey duration (P<0.001), allometric coefficient (P<0.001), temperature humidity index (P<0.001) and prod use during loading (P=0.0012) with cattle shrink. / October 2015

Physical inactivity is a modifiable risk factor for cardiovascular diseases and other chronic diseases of life. In countries undergoing economic transition from underdeveloped to being developed, there is an increasing rate of physical inactivity. Accurate assessment of physical activity behaviours is important for determining the presence of physical inactivity, for setting goals for physical therapy interventions to increase physical activity and to utilize physical activity as an outcome measure for physical therapy interventions. There are different techniques used to measure physical activity, namely questionnaires, motion sensors (pedometers and accelerometers) and doubly labelled water. The most used method in large epidemiological research is questionnaires because of their affordability and feasibility. Limitations of physical activity questionnaires include the exclusion of house-hold activities, intensity of work done, bicycling, duration and frequency of leisure time activities. Motion sensors have been mostly used in developed and westernized countries. In the North West Province (NWP) of South Africa the only method that has been used to determine physical activity among the Tswana speaking people was the Transition of Health during urbanization physical activity questionnaire (THUSA-PAQ). The application of other methods such as the motion sensors has never been done. Objectives: The study comprised two major objectives: The first objective was to determine the physical activity levels of the rural and urban Tswana speaking people of the NWP using the THUS A questionnaire and pedometers. The second objective was to determine whether there is a relationship in physical activity determined by the THUSA-PAQ, promotional pedometer and an accelerometer determined activity. Methods The participants recruited for this study form part of the larger prospective urban and rural epidemiology (PURE) longitudinal study running over 12 years which started in 2005. A subsample of 200 was randomly selected of which hundred and eighty signed the informed consent (90 urban and 90 rural) to participate in the study. The participants completed the THUSA-PAQ with the assistance help of the fieldworkers in their native language and wore pedometers for seven consecutive days. The number of steps taken per day distance travelled and energy expenditure were recorded in a logbook. Another thirty eight participants from a co-hort in the same geographical area were issued with accelerometers to wear simultaneously with pedometers for a period of twenty four hours and also completed the THUSA-PAQ. Results The rural male and female participants reported higher average physical activity index (PAT) with the THUSA questionnaire (9.49 ± 3.67 and 8.10 ± 1.26) than urban male and female participants (8.13 ± 2.47 and 7.51 ± 1.65) respectively. The same trend was observed with the objectively determined physical activity with the pedometers. A partial correlation adjusted for age and gender showed no statistical significance between the subjectively determined physical activity index (PAT) and the objectively determined activity (average steps per day). Results from the co-hort participants indicated that both male and female participants spent a larger percentage of their time on sedentary activities (66.45 ± 15.84% and 70.13 ± 8.39%) respectively. Most of the participants, 64.7% females and 52.1% males, recorded fewer than 5000 steps per day with a pedometer and reported high PAI (9.61 ± 1.83 males and 7.79 ± 1.26 females) with the THUSA-PAQ. On this population partial correlation analyses that was adjusted for age and body mass index (BMT) showed a statistical significant relationship between (p<0.05) time spent on vigorous activities and commute index between male and female participants. There was no statistical significant relationship between the PAI (THUSA-PAQ), activity energy expenditure (AEE) determined with an accelerometer and the number of steps per day determined with a pedometer. Conclusion The major conclusion that can be drawn from this study is that the participants did not meet the recommended physical activity levels (30 min moderate physical activity or 10 000 pedometer determined steps per day). The participants reported high subjective physical activity index (PAI) with the THXJSA-PAQ which did not correlate with the low objectively determined number of steps per day using the pedometer and AEE. Possible reasons for this include the influence of perception toward physical activity, social desrrabiUty, seasonal changes, reactivity and time of the year. Motion sensors gave a better indication of habitual physical activity among the Tswana speaking people of the NWP and should be considered for further research. / Thesis (M.Sc. (Human Movement Science))--North-West University, Potchefstroom Campus, 2009.

Physical inactivity is a modifiable risk factor for cardiovascular diseases and other chronic diseases of life. In countries undergoing economic transition from underdeveloped to being developed, there is an increasing rate of physical inactivity. Accurate assessment of physical activity behaviours is important for determining the presence of physical inactivity, for setting goals for physical therapy interventions to increase physical activity and to utilize physical activity as an outcome measure for physical therapy interventions. There are different techniques used to measure physical activity, namely questionnaires, motion sensors (pedometers and accelerometers) and doubly labelled water. The most used method in large epidemiological research is questionnaires because of their affordability and feasibility. Limitations of physical activity questionnaires include the exclusion of house-hold activities, intensity of work done, bicycling, duration and frequency of leisure time activities. Motion sensors have been mostly used in developed and westernized countries. In the North West Province (NWP) of South Africa the only method that has been used to determine physical activity among the Tswana speaking people was the Transition of Health during urbanization physical activity questionnaire (THUSA-PAQ). The application of other methods such as the motion sensors has never been done. Objectives: The study comprised two major objectives: The first objective was to determine the physical activity levels of the rural and urban Tswana speaking people of the NWP using the THUS A questionnaire and pedometers. The second objective was to determine whether there is a relationship in physical activity determined by the THUSA-PAQ, promotional pedometer and an accelerometer determined activity. Methods The participants recruited for this study form part of the larger prospective urban and rural epidemiology (PURE) longitudinal study running over 12 years which started in 2005. A subsample of 200 was randomly selected of which hundred and eighty signed the informed consent (90 urban and 90 rural) to participate in the study. The participants completed the THUSA-PAQ with the assistance help of the fieldworkers in their native language and wore pedometers for seven consecutive days. The number of steps taken per day distance travelled and energy expenditure were recorded in a logbook. Another thirty eight participants from a co-hort in the same geographical area were issued with accelerometers to wear simultaneously with pedometers for a period of twenty four hours and also completed the THUSA-PAQ. Results The rural male and female participants reported higher average physical activity index (PAT) with the THUSA questionnaire (9.49 ± 3.67 and 8.10 ± 1.26) than urban male and female participants (8.13 ± 2.47 and 7.51 ± 1.65) respectively. The same trend was observed with the objectively determined physical activity with the pedometers. A partial correlation adjusted for age and gender showed no statistical significance between the subjectively determined physical activity index (PAT) and the objectively determined activity (average steps per day). Results from the co-hort participants indicated that both male and female participants spent a larger percentage of their time on sedentary activities (66.45 ± 15.84% and 70.13 ± 8.39%) respectively. Most of the participants, 64.7% females and 52.1% males, recorded fewer than 5000 steps per day with a pedometer and reported high PAI (9.61 ± 1.83 males and 7.79 ± 1.26 females) with the THUSA-PAQ. On this population partial correlation analyses that was adjusted for age and body mass index (BMT) showed a statistical significant relationship between (p<0.05) time spent on vigorous activities and commute index between male and female participants. There was no statistical significant relationship between the PAI (THUSA-PAQ), activity energy expenditure (AEE) determined with an accelerometer and the number of steps per day determined with a pedometer. Conclusion The major conclusion that can be drawn from this study is that the participants did not meet the recommended physical activity levels (30 min moderate physical activity or 10 000 pedometer determined steps per day). The participants reported high subjective physical activity index (PAI) with the THXJSA-PAQ which did not correlate with the low objectively determined number of steps per day using the pedometer and AEE. Possible reasons for this include the influence of perception toward physical activity, social desrrabiUty, seasonal changes, reactivity and time of the year. Motion sensors gave a better indication of habitual physical activity among the Tswana speaking people of the NWP and should be considered for further research. / Thesis (M.Sc. (Human Movement Science))--North-West University, Potchefstroom Campus, 2009.

Thesis (M.S.)--Michigan State University. Small Animal Clinical Sciences, 2008. / Title from PDF t.p. (viewed on July 27, 2009) Includes bibliographical references. Also issued in print.

Neste trabalho foram desenvolvidos sistemas de aquisição portáteis de formato esférico, capazes de sensoriar forças de compressão e impacto ao longo dos três eixos cartesianos. Os instrumentos desenvolvidos foram utilizados em diferentes experimentos feitos em estabelecimentos de beneficiamento de frutas (packinghouses) durante o processo de pós-colheita a fim de verificar os danos mecânicos sofridos pelas mesmas. Os instrumentos são sistemas microcontrolados compostos por quarto sensores (acelerômetros, célula de carga, temperatura e umidade), memória Flash para o armazenamento dos dados, transceptor de rádio freqüência e uma porta de comunicações serial universal (USB). A coleta, apresentação e processamentos dos dados obtidos foram feitos por um software desenvolvido em ambiente C++ para o sistema operacional Windows. Fortes forças de compressão e impacto foram registradas, sugerindo a necessidade de mudanças no processo de seleção (mecânica e manual), empacotamento e transporte de frutas. Quatro protótipos diferentes foram desenvolvidos, dois com cabos e dois sem. Os dispositivos provaram ser úteis, funcionando como esperado e o seu projeto modular permite o desenvolvimento de diferentes instrumentos. Os resultados obtidos propiciaram pesquisas relativas aos danos sofridos por frutas durante o processo de pós-colheita. / In this work, spherical shape portable data acquisition systems that are capable of sensing compression and impact forces along the three Cartesian axes were developed. The developed instruments were utilized in several different experiments done in fruit packinghouses during the post harvest process in order to check the mechanical damages they suffer. They are microcontrolled systems composed by four sensors (accelerometers, load cell, temperature and humidity), Flash memory for data storage, radio frequency transceiver and a universal serial bus (USB) communication port. The download, presentation and data processing were done by developed C++ software that runs in a Windows environment. Strong compression and impact forces were recorded, suggesting a need for changes in the mechanical and manual selection, packing and transportation of fruits. Four different prototypes were developed, two corded and two wireless versions. The devices developed were proven to be useful, worked as expected and their modular design permit future developments. The results allowed for different research concerning the damages suffered by the fruits, during the post harvest process.

Neste trabalho foram desenvolvidos sistemas de aquisição portáteis de formato esférico, capazes de sensoriar forças de compressão e impacto ao longo dos três eixos cartesianos. Os instrumentos desenvolvidos foram utilizados em diferentes experimentos feitos em estabelecimentos de beneficiamento de frutas (packinghouses) durante o processo de pós-colheita a fim de verificar os danos mecânicos sofridos pelas mesmas. Os instrumentos são sistemas microcontrolados compostos por quarto sensores (acelerômetros, célula de carga, temperatura e umidade), memória Flash para o armazenamento dos dados, transceptor de rádio freqüência e uma porta de comunicações serial universal (USB). A coleta, apresentação e processamentos dos dados obtidos foram feitos por um software desenvolvido em ambiente C++ para o sistema operacional Windows. Fortes forças de compressão e impacto foram registradas, sugerindo a necessidade de mudanças no processo de seleção (mecânica e manual), empacotamento e transporte de frutas. Quatro protótipos diferentes foram desenvolvidos, dois com cabos e dois sem. Os dispositivos provaram ser úteis, funcionando como esperado e o seu projeto modular permite o desenvolvimento de diferentes instrumentos. Os resultados obtidos propiciaram pesquisas relativas aos danos sofridos por frutas durante o processo de pós-colheita. / In this work, spherical shape portable data acquisition systems that are capable of sensing compression and impact forces along the three Cartesian axes were developed. The developed instruments were utilized in several different experiments done in fruit packinghouses during the post harvest process in order to check the mechanical damages they suffer. They are microcontrolled systems composed by four sensors (accelerometers, load cell, temperature and humidity), Flash memory for data storage, radio frequency transceiver and a universal serial bus (USB) communication port. The download, presentation and data processing were done by developed C++ software that runs in a Windows environment. Strong compression and impact forces were recorded, suggesting a need for changes in the mechanical and manual selection, packing and transportation of fruits. Four different prototypes were developed, two corded and two wireless versions. The devices developed were proven to be useful, worked as expected and their modular design permit future developments. The results allowed for different research concerning the damages suffered by the fruits, during the post harvest process.

Made available in DSpace on 2014-10-09T12:51:53Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:06:43Z (GMT). No. of bitstreams: 0 / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

Made available in DSpace on 2014-10-09T12:43:55Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:08:37Z (GMT). No. of bitstreams: 1 06786.pdf: 7146263 bytes, checksum: 0ad9a0e558c3dc7c1847019c4d7753a1 (MD5) / Dissertacao [Mestrado] / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

Neste trabalho foram desenvolvidos sistemas de aquisição portáteis de formato esférico, capazes de sensoriar forças de compressão e impacto ao longo dos três eixos cartesianos. Os instrumentos desenvolvidos foram utilizados em diferentes experimentos feitos em estabelecimentos de beneficiamento de frutas (packinghouses) durante o processo de pós-colheita a fim de verificar os danos mecânicos sofridos pelas mesmas. Os instrumentos são sistemas microcontrolados compostos por quarto sensores (acelerômetros, célula de carga, temperatura e umidade), memória Flash para o armazenamento dos dados, transceptor de rádio freqüência e uma porta de comunicações serial universal (USB). A coleta, apresentação e processamentos dos dados obtidos foram feitos por um software desenvolvido em ambiente C++ para o sistema operacional Windows. Fortes forças de compressão e impacto foram registradas, sugerindo a necessidade de mudanças no processo de seleção (mecânica e manual), empacotamento e transporte de frutas. Quatro protótipos diferentes foram desenvolvidos, dois com cabos e dois sem. Os dispositivos provaram ser úteis, funcionando como esperado e o seu projeto modular permite o desenvolvimento de diferentes instrumentos. Os resultados obtidos propiciaram pesquisas relativas aos danos sofridos por frutas durante o processo de pós-colheita. / In this work, spherical shape portable data acquisition systems that are capable of sensing compression and impact forces along the three Cartesian axes were developed. The developed instruments were utilized in several different experiments done in fruit packinghouses during the post harvest process in order to check the mechanical damages they suffer. They are microcontrolled systems composed by four sensors (accelerometers, load cell, temperature and humidity), Flash memory for data storage, radio frequency transceiver and a universal serial bus (USB) communication port. The download, presentation and data processing were done by developed C++ software that runs in a Windows environment. Strong compression and impact forces were recorded, suggesting a need for changes in the mechanical and manual selection, packing and transportation of fruits. Four different prototypes were developed, two corded and two wireless versions. The devices developed were proven to be useful, worked as expected and their modular design permit future developments. The results allowed for different research concerning the damages suffered by the fruits, during the post harvest process.

Made available in DSpace on 2014-10-09T12:51:53Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:06:43Z (GMT). No. of bitstreams: 0 / Vazamentos em tubos pressurizados geram ondas acústicas que se propagam através das paredes destes tubos, as quais podem ser captadas por acelerômetros ou por sensores de emissão acústica. O conhecimento de como estas paredes podem vibrar, ou de outro modo como as ondas acústicas se propagam neste meio, é fundamental em um processo de detecção e localização da fonte de vazamento. Neste trabalho, foi implementado um modelo analítico, através das equações de movimento da casca cilíndrica, com o objetivo de entender o comportamento da superfície do tubo em função de uma excitação pontual. Como a superfície cilíndrica é um meio fechado na direção circunferencial, ondas que iniciaram sua jornada, a partir de uma fonte pontual sobre a superfície, se encontrarão com outras que já completaram a volta na casca cilíndrica, tanto no sentido horário como no anti-horário, gerando interferências construtivas e destrutivas. Após um tempo suficiente, uma estacionariedade é atingida, criando pontos de picos e vales na superfície da casca, os quais podem ser visualizadas através de uma representação gráfica do modelo analítico criado. Os resultados teóricos foram comprovados através de medidas realizadas em uma bancada de testes composta de um tubo de aço terminado em caixa de areia, simulando a condição de tubo infinito. Para proceder à localização da fonte pontual sobre a superfície, adotou-se o processo de solução inversa, ou seja, conhecidos os sinais dos sensores dispostos na superfície do tubo, determina-se através do modelo teórico onde a fonte que gerou estes sinais pode estar. / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP