The purpose of this study was to explore student, teacher, and administrator perspectives regarding student attachment in three secondary school environments that contained a wide variety of programs and served a diverse spectrum of student needs. Student attachment was examined by using a questionnaire, by interviewing students and teachers in focus group meetings, and by documenting student, teacher, and administrator perspectives regarding student attachment and the ways schools may encourage student attachment to school. The central question posed was, "What is student attachment to school, and does it exist to the same extent in different schools and school programs?" </p> <p>The study employed data collected from three secondary schools--an alternative community school with block scheduling, a collegiate organized with teacher advisory groupings, and a comprehensive collegiate with technical--vocational elective courses. Within two of the schools were French Immersion programs and one school held an advanced program for academically talented students. In total, 373 students completed a questionnaire, 88 students and 20 teachers participated in 19 focus group meetings and three administrators, one at each site, were interviewed. </p><p>Several techniques were employed to analyze the quantitative and qualitative data collected through the questionnaire, focus groups, and administrator interviews. Using factor analysis, seven factors were generated, providing a framework for examining student attachment to school. The factors delineated were belongingness, self esteem, friendships, teacher relationships, valuing school, involvement, and security. These seven factors allowed for a clear description of how this construct was perceived by students, teachers, and administrators within the three school sites. It was found that students scoring high on some or all of these factors were attached to school. Low scores on most or all factors indicated alienation or a lack of attachment to school. Students in a school with a philosophy of support and an emphasis on relationships had higher scores for belongingness and teacher relationships, while students in specialized programs such as Advanced or French Immersion had higher scores for self esteem and friendships. Students in modified-tracked courses exhibited lower scores on many of the attachment to school factors. </p><p>Student attachment to school existed in all three sites examined through this study, but the extent of the individual constructs comprising attachment to school varied. As the scores for the seven factors outlined by the responses to the questionnaire varied a great deal by program and by school, it became apparent that each of the learning environments affected student perceptions of their belongingness, friendships, relationships with teachers, valuing of school, involvement in activities, and security. Self esteem appeared to be the product of more than just the present learning environment. </p><p>Measuring student attachment to school is one way to gauge the effectiveness of the learning environment. Since a significant difference in student attachment to school has been identified between schools participating in this study and even between student programs within the same school, findings of the study support addressing student attachment to school when determining the organizational structure of a secondary school. It is apparent there is a relationship for students between marks and attachment to school. Further studies are necessary to understand to what extent student achievement influences each of the attachment factors or to what extent each of the factors influences student achievement.

The purpose of this study was to explore student, teacher, and administrator perspectives regarding student attachment in three secondary school environments that contained a wide variety of programs and served a diverse spectrum of student needs. Student attachment was examined by using a questionnaire, by interviewing students and teachers in focus group meetings, and by documenting student, teacher, and administrator perspectives regarding student attachment and the ways schools may encourage student attachment to school. The central question posed was, "What is student attachment to school, and does it exist to the same extent in different schools and school programs?" </p> <p>The study employed data collected from three secondary schools--an alternative community school with block scheduling, a collegiate organized with teacher advisory groupings, and a comprehensive collegiate with technical--vocational elective courses. Within two of the schools were French Immersion programs and one school held an advanced program for academically talented students. In total, 373 students completed a questionnaire, 88 students and 20 teachers participated in 19 focus group meetings and three administrators, one at each site, were interviewed. </p><p>Several techniques were employed to analyze the quantitative and qualitative data collected through the questionnaire, focus groups, and administrator interviews. Using factor analysis, seven factors were generated, providing a framework for examining student attachment to school. The factors delineated were belongingness, self esteem, friendships, teacher relationships, valuing school, involvement, and security. These seven factors allowed for a clear description of how this construct was perceived by students, teachers, and administrators within the three school sites. It was found that students scoring high on some or all of these factors were attached to school. Low scores on most or all factors indicated alienation or a lack of attachment to school. Students in a school with a philosophy of support and an emphasis on relationships had higher scores for belongingness and teacher relationships, while students in specialized programs such as Advanced or French Immersion had higher scores for self esteem and friendships. Students in modified-tracked courses exhibited lower scores on many of the attachment to school factors. </p><p>Student attachment to school existed in all three sites examined through this study, but the extent of the individual constructs comprising attachment to school varied. As the scores for the seven factors outlined by the responses to the questionnaire varied a great deal by program and by school, it became apparent that each of the learning environments affected student perceptions of their belongingness, friendships, relationships with teachers, valuing of school, involvement in activities, and security. Self esteem appeared to be the product of more than just the present learning environment. </p><p>Measuring student attachment to school is one way to gauge the effectiveness of the learning environment. Since a significant difference in student attachment to school has been identified between schools participating in this study and even between student programs within the same school, findings of the study support addressing student attachment to school when determining the organizational structure of a secondary school. It is apparent there is a relationship for students between marks and attachment to school. Further studies are necessary to understand to what extent student achievement influences each of the attachment factors or to what extent each of the factors influences student achievement.

No description available.

Este trabajo de título tiene como objetivo el investigar y aplicar dos estándares de servicios Web llamados WS-Attachment y WS-Security. Estos estándares proveen una mejor comunicación y coordinación entre aplicaciones colaborativas que necesitan intercambiar información y autenticarse. Además, ellos facilitan la integración de servicios expuestos o consumidos en dispositivos computacionales móviles, lo que permiten un trabajo colaborativo en escenarios adhoc. Para llevar a cabo este trabajo se tomó como base un servidor Web para dispositivos móviles, el cual fue diseñado para ocupar el mínimo de recursos de hardware. Este servidor solamente aceptaba clientes que solicitaban algún servicio Web, ejecutaba el servicio requerido y enviaba al cliente la respuesta del servicio. Por lo tanto, luego de conocer en detalle las especificaciones estándares para adjuntos (WS-Attachments) y seguridad (WS-Security), se estudiaron los procesos generados por el servidor Web, para así poder agregarle de la forma más modular posible, las nuevas implementaciones correspondientes a dichos estándares. De esta forma, se obtuvo un MicroServidor Web ideal para aplicaciones colaborativas móviles que necesiten intercambio de archivos y autenticación. Además, este producto utiliza pocos recursos de hardware y permite obtener buenos tiempos de respuesta aún en dispositivos pequeños como PDAs. El MicroServidor fue sometido a pruebas de desempeño y de concurrencia, alcanzando resultados muy alentadores. Sin duda, las mejoras desarrolladas en el MicroServidor, sobre adjuntos y seguridad, le permiten a los servicios Web abarcar muchos más escenarios de integración de sistemas. La memoria también presenta un par de aplicaciones colaborativas, cuyos desarrollos fueron inicialmente independientes del MicroServidor. Sin embargo, luego de re-implementarlas sobre el MicroServidor, se pueden ver las mejoras en los servicios introducidos por el uso de este componente base. A pesar de lo útil que es ahora el MicroServidor, se debe continuar su desarrollo en base a otros estándares, para un mayor beneficio a usuarios que, con el uso de dispositivos móviles, buscan mejorar sus capacidades de trabajo.

Proper attachment of chromosomes to microtubules is important for the accurate segregation of chromosomes and genome stability. The initial engagement of chromosomes happens along the lateral wall of microtubules through a highly specialised protein structure assembled on the centromeric DNA, the kinetochore. Ultimately, kinetochores must be attached to the ends of microtubules (a geometry called end- on attachment). A series of highly dynamic steps called the end-on conversion process, converts the initial immature lateral attachments into mature end-on attachments. How this process is finely tuned by phosphorylation and dephosphorylation to achieve stable attachments is still unclear. Furthermore, what is the role of microtubule-associated proteins in the stabilisation of kinetochore-microtubule attachments is unknown. This project aimed to study the role of phosphatases in the regulation of the end-on conversion process. First, I investigated the different contribution of the two outer-kinetochore phosphatases - BubR1- recruited PP2A-B56 and KNL1-recruited PP1 - in counteracting Aurora B kinase during the end-on conversion process. I found that BubR1-recruited PP2A-B56 plays an essential role in the process, but KNL1-recruited PP1 does not. I also investigated whether the HEC1/Ndc80 N-tail is a critical substrate of Aurora B phosphorylation for the stabilisation of the end-on attachments. Using a phospho-dead mutant of the HEC1/Ndc80 N-tail, I discovered that cells are still susceptible to Aurora B activity, indicating downstream pathways independent of HEC1/Ndc80. Then, I studied the biological role of the Astrin C-terminus, where an evolutionarily conserved RVMF motif, a putative PP1 binding site, is located. My findings show C-terminal Astrin mutants fail to localise at kinetochores of both monopolar and bipolar spindles; induce defects in the end-on conversion process in monopolar spindles and prolong mitosis time with increased Mad2 levels at the outer-kinetochore. A kinase inhibitor assay showed that kinetochore-microtubule attachment defects in Astrin mutant expressing cells could be rescued when both Aurora B and Cdk1 kinases are inhibited, suggesting a role for Astrin’s C-terminus in counteracting Aurora B and Cdk1 activity. Finally, I probed the putative interaction of the Astrin C-terminus and PP1 using biochemistry, cell biology and fluorescence microscopy techniques. I discovered that artificially targeting PP1 onto the Astrin C-terminus but not on the N-terminus rescues mutants localisation defects at the kinetochore. In summary, my results indicate that Astrin and PP1 interact at the kinetochore of living cells. In conclusion, my work shows that mitotic phosphatases have distinctive contributions in the regulation of the dynamic steps of the end-on conversion process and that Astrin is a potential PP1 phosphatase recruiter at the outer-kinetochore, where is necessary for the stabilisation of end-on attachments.

The problem of determining the eigenvalues of a vibrational system having multiple lumped attachments has been investigated extensively. However, most of the research conducted in this field focuses on determining the natural frequencies of the combined system assuming that the characteristics of the combined vibrational system are known (forward problem). A problem of great interest from the point of view of engineering design is the ability to impose certain frequencies on the vibrational system or to avoid certain frequencies by modifying the characteristics of the vibrational system (inverse problem). In this thesis, the effects of adding lumped masses to an Euler-Bernoulli beam on its frequencies and their corresponding mode shapes are investigated for simply-supported as well as fixed-free boundary conditions. This investigation paves the way for proposing a method to impose two frequencies on a system consisting of a beam and a lumped mass by determining the magnitude of the mass as well as its position along the beam.

The purpose of this study is to scrutinize consumers attachment in fashion and clothing in relation to impulse buying behaviour. The study further investigates how attachment and detachment correspondent in late modern consumerism. Design/ Methodology/ Approach – This study adopted a mixed-method approach. Initially previous research on the chosen field has been reviewed to know what research has been done. Following that, an online quantitative survey has been conducted to distinguish whether any relationship endures between consumers attachment to existing clothing and their compulsive buying tendencies. Based on the results of the quantitative study a qualitative investigation has also been conducted with the intention of gaining in-depth knowledge of the chosen area of research. Findings – The data reveals that survey and interview respondents show different conception regarding attachment requiring different motivational stimuli. Moreover, this study identifies the triangle of fashion attachment, detachment and impulse consumerism that emerges as relevant to existing consumer behaviour spectrum. Implications – The study delivers explorative understanding on the clothing attachment, which was an underdeveloped area of research. Further, this establishment provide progression to combine two self-contradictory area in same study which is paradoxical and therefore, provides a novel approach to continue father research. Originality/ Value – The study provides narrative insights into the field of clothing attachment In combination with impulsive buying behaviour in a fashion and clothing context. Further, through the combination of a mix methodological approach which is also a new angle to study this phenomenon

The problem of determining the eigenvalues of a vibrational system having multiple lumped attachments has been investigated extensively. However, most of the research conducted in this field focuses on determining the natural frequencies of the combined system assuming that the characteristics of the combined vibrational system are known (forward problem). A problem of great interest from the point of view of engineering design is the ability to impose certain frequencies on the vibrational system or to avoid certain frequencies by modifying the characteristics of the vibrational system (inverse problem). In this thesis, the effects of adding lumped masses to an Euler-Bernoulli beam on its frequencies and their corresponding mode shapes are investigated for simply-supported as well as fixed-free boundary conditions. This investigation paves the way for proposing a method to impose two frequencies on a system consisting of a beam and a lumped mass by determining the magnitude of the mass as well as its position along the beam.

Uma prótese dental quando planejada, tem como objetivo manter o equilíbrio entre saúde e função do sistema estomatognático, preservar suas estruturas, proporcionar estética e conforto ao paciente durante o uso. Portanto, sabendo-se da repercussão que pode causar nos dentes suporte, o planejamento deve ser correto, evitando o estabelecimento de uma patologia mais severa no sistema suporte. O uso de encaixes em PPRs de extremidades livres se justifica pela melhora da estética e satisfação do paciente. A análise fotoelástica é uma técnica experimental para análise de tensões capaz de produzir resultados bastante confiáveis e fiéis aos parâmetros clínicos. Assim o presente estudo teve como objetivo avaliar a força de retenção simulando cinco anos de uso de três diferentes tipos de encaixes extracoronários: ASC 52: resiliente, movimento vertical/rotacional e retenção friccional ajustável; SR 3: semi-rígido, movimento rotacional e retenção friccional/mecânica, Swiss-Ex: rígido, retenção friccional/mecânica e as tensões desenvolvidas nas estruturas de suporte destas próteses. Para avaliar a retenção foi utilizada matriz metálica em Co-Cr, representando um hemi-arco inferior parcialmente desdentado com os dentes remanescentes 43/44 preparados para coroas totais e ausência dos dentes 45/46/47. Foram fundidas coroas totais em Ni-Cr com machos dos encaixes na distal do dente 44. Estruturas de PPR foram fundidas e as fêmeas dos encaixes capturadas. O total de corpos-de-prova foi 18 (6 por tipo de encaixe). Foram realizados 7205 ciclos de inserção/remoção a 20 ciclos/min, com o conjunto imerso em água deionizada (±37º C). Foram observados os valores de força (N) para t=0, ½, 1, 2, 3, 4 e 5 anos. Para análise estatística foi utilizado o modelo linear de efeitos mistos (efeitos aleatórios e fixos) que é utilizado na análise de dados onde as respostas de um mesmo corpo-de-prova estão agrupadas e a suposição de independência entre as observações num mesmo grupo não é adequada. O ajuste do modelo foi feito através do procedimento PROC MIXED do software SAS® 9.1. Houve diferença estatística significante (p=0,000) entre os grupos: ASC52(8,15±1,12N); SR 3(3,84±1,80N); Swiss-Ex(2,05±0,83N). Avaliando os tempos não houve diferença significante entre os encaixes ASC 52 e Swiss-Ex. Para o SR 3 a força diminuiu ao longo dos tempos. O ASC 52 proporcionou maior estabilidade na prótese e manteve a capacidade retentiva durante os 5 anos simulados. Para análise fotoelástica foi confeccionado um modelo mestre em plexiglass representando um hemi-arco inferior de extremidade livre com os dentes 43 e 44 preparados para coroa total e ausência do 45, 46 e 47. Foram fundidas coroas totais em Ni-Cr com machos dos encaixes na distal do dente 44. Estruturas de PPR foram fundidas e as fêmeas dos encaixes capturadas. Sobre a sela foram montados os dentes artificiais 45 e 46. Posicionou-se os dentes 43 e 44 preparados e com as raízes simulando o ligamento periodontal no molde do modelo mestre e verteu-se resina fotoelástica. As análises foram realizadas em 3 diferentes aplicações de força (15N) nas distais: pontual no dente 45 e 46 e simultânea nos dentes 44 e 46. Os encaixes semi-rígido e resiliente ciclados geraram mais tensão nos pontos mais distais localizados no rebordo e a aplicação de carga pontual na distal do dente 46 foi a que gerou menos tensão nos dentes pilares para todos os encaixes novos e ciclados. Projeto FAPESP 05/58363-5 / A planned dental prosthesis aims to maintain the balance between health and function of the stomatognathic system, preserving its structures, providing aesthetics and patient comfort during use. Therefore, knowing the repercussions that may result on the support teeth, it must be correctly planned to avoid the establishment of a more severe pathology in the support system. The use of distal-extension removable partial dentures with attachments is justified by the improved aesthetics and patient satisfaction. The photoelastic analysis is an experimental technique for analysis of stresses capable of producing reliable and faithful results to clinical parameters. Thus, this study aimed to evaluate the retention force of three different extracoronal attachments simulating five years of use: ASC 52: resilient, vertical/rotational movement and adjustable fictional retention; SR 3: semi-rigid, rotational movement and frictional/mechanical retention; Swiss-Ex: rigid, frictional/mechanical retention and the stresses developed in the support structures of these prostheses. To assess the retention a partially edentulous metallic matrix Co-Cr representing a lower hemi-ach was used with teeth 43/44 remaining prepared for crowns and lacking teeth 45/46/47. Crowns were cast in Ni-Cr, with male attachments on the distal of tooth 44. PPR structures were merged and the female attachments captured. The total sample was 18 (6 for each type). A total of 7205 cycles of insertion/removal were performed at 20 cycles/min with the set submerged in deionized water (±37°). Force values (N) for t = 0, ½, 1, 2, 3, 4, and 5 years were observed. The linear mixed effects model (random and fixed effects) that is used in data analysis where the responses of the same sample are grouped and the assumption of independence of observations within the same group is not appropriate was used for statistical analysis. The model adjustment was done using the PROC MIXED procedure of the SAS® 9.1 software. There was a significant difference (p =0,000) between groups: ASC 52 (8,15 ± 1,12N); SR 3 (3,84 ± 1,80N); Swiss-Ex (2,05 ± 0,83N). There was no significant difference in the time evaluation between the attachments ASC 52 and Swiss-Ex. The SR 3 force decreased over time. The ASC 52 provided greater stability and maintained the retentive capacity over the 5 year simulation. A Plexiglas master model representing a distal extension hemi-arch inferior with teeth 43 and 44 prepared for crowns and absence of teeth 45, 46 and 47 was made for photoelastic analysis. Crowns were cast in Ni-Cr, with male attachments on the distal of tooth 44. PPR structures were merged and the female attachments captured. Artificial teeth 45 and 46 were mounted on the saddle. Prepared teeth 43 and 44 with roots simulating the periodontal ligament were positioned in the master model and the photoelastic resin was poured. Analyses were performed in three different applications of force (15N) in the distal: specific on teeth 45 and 46 and simultaneously on teeth 44 and 46. Cycled semirigid and resilient attachments generated more tension on the most distal points located at the edge and load application on the distal of tooth 46 was the one that generated the least stress on the abutment teeth for all attachments, new and cycled.

Uma prótese dental quando planejada, tem como objetivo manter o equilíbrio entre saúde e função do sistema estomatognático, preservar suas estruturas, proporcionar estética e conforto ao paciente durante o uso. Portanto, sabendo-se da repercussão que pode causar nos dentes suporte, o planejamento deve ser correto, evitando o estabelecimento de uma patologia mais severa no sistema suporte. O uso de encaixes em PPRs de extremidades livres se justifica pela melhora da estética e satisfação do paciente. A análise fotoelástica é uma técnica experimental para análise de tensões capaz de produzir resultados bastante confiáveis e fiéis aos parâmetros clínicos. Assim o presente estudo teve como objetivo avaliar a força de retenção simulando cinco anos de uso de três diferentes tipos de encaixes extracoronários: ASC 52: resiliente, movimento vertical/rotacional e retenção friccional ajustável; SR 3: semi-rígido, movimento rotacional e retenção friccional/mecânica, Swiss-Ex: rígido, retenção friccional/mecânica e as tensões desenvolvidas nas estruturas de suporte destas próteses. Para avaliar a retenção foi utilizada matriz metálica em Co-Cr, representando um hemi-arco inferior parcialmente desdentado com os dentes remanescentes 43/44 preparados para coroas totais e ausência dos dentes 45/46/47. Foram fundidas coroas totais em Ni-Cr com machos dos encaixes na distal do dente 44. Estruturas de PPR foram fundidas e as fêmeas dos encaixes capturadas. O total de corpos-de-prova foi 18 (6 por tipo de encaixe). Foram realizados 7205 ciclos de inserção/remoção a 20 ciclos/min, com o conjunto imerso em água deionizada (±37º C). Foram observados os valores de força (N) para t=0, ½, 1, 2, 3, 4 e 5 anos. Para análise estatística foi utilizado o modelo linear de efeitos mistos (efeitos aleatórios e fixos) que é utilizado na análise de dados onde as respostas de um mesmo corpo-de-prova estão agrupadas e a suposição de independência entre as observações num mesmo grupo não é adequada. O ajuste do modelo foi feito através do procedimento PROC MIXED do software SAS® 9.1. Houve diferença estatística significante (p=0,000) entre os grupos: ASC52(8,15±1,12N); SR 3(3,84±1,80N); Swiss-Ex(2,05±0,83N). Avaliando os tempos não houve diferença significante entre os encaixes ASC 52 e Swiss-Ex. Para o SR 3 a força diminuiu ao longo dos tempos. O ASC 52 proporcionou maior estabilidade na prótese e manteve a capacidade retentiva durante os 5 anos simulados. Para análise fotoelástica foi confeccionado um modelo mestre em plexiglass representando um hemi-arco inferior de extremidade livre com os dentes 43 e 44 preparados para coroa total e ausência do 45, 46 e 47. Foram fundidas coroas totais em Ni-Cr com machos dos encaixes na distal do dente 44. Estruturas de PPR foram fundidas e as fêmeas dos encaixes capturadas. Sobre a sela foram montados os dentes artificiais 45 e 46. Posicionou-se os dentes 43 e 44 preparados e com as raízes simulando o ligamento periodontal no molde do modelo mestre e verteu-se resina fotoelástica. As análises foram realizadas em 3 diferentes aplicações de força (15N) nas distais: pontual no dente 45 e 46 e simultânea nos dentes 44 e 46. Os encaixes semi-rígido e resiliente ciclados geraram mais tensão nos pontos mais distais localizados no rebordo e a aplicação de carga pontual na distal do dente 46 foi a que gerou menos tensão nos dentes pilares para todos os encaixes novos e ciclados. Projeto FAPESP 05/58363-5 / A planned dental prosthesis aims to maintain the balance between health and function of the stomatognathic system, preserving its structures, providing aesthetics and patient comfort during use. Therefore, knowing the repercussions that may result on the support teeth, it must be correctly planned to avoid the establishment of a more severe pathology in the support system. The use of distal-extension removable partial dentures with attachments is justified by the improved aesthetics and patient satisfaction. The photoelastic analysis is an experimental technique for analysis of stresses capable of producing reliable and faithful results to clinical parameters. Thus, this study aimed to evaluate the retention force of three different extracoronal attachments simulating five years of use: ASC 52: resilient, vertical/rotational movement and adjustable fictional retention; SR 3: semi-rigid, rotational movement and frictional/mechanical retention; Swiss-Ex: rigid, frictional/mechanical retention and the stresses developed in the support structures of these prostheses. To assess the retention a partially edentulous metallic matrix Co-Cr representing a lower hemi-ach was used with teeth 43/44 remaining prepared for crowns and lacking teeth 45/46/47. Crowns were cast in Ni-Cr, with male attachments on the distal of tooth 44. PPR structures were merged and the female attachments captured. The total sample was 18 (6 for each type). A total of 7205 cycles of insertion/removal were performed at 20 cycles/min with the set submerged in deionized water (±37°). Force values (N) for t = 0, ½, 1, 2, 3, 4, and 5 years were observed. The linear mixed effects model (random and fixed effects) that is used in data analysis where the responses of the same sample are grouped and the assumption of independence of observations within the same group is not appropriate was used for statistical analysis. The model adjustment was done using the PROC MIXED procedure of the SAS® 9.1 software. There was a significant difference (p =0,000) between groups: ASC 52 (8,15 ± 1,12N); SR 3 (3,84 ± 1,80N); Swiss-Ex (2,05 ± 0,83N). There was no significant difference in the time evaluation between the attachments ASC 52 and Swiss-Ex. The SR 3 force decreased over time. The ASC 52 provided greater stability and maintained the retentive capacity over the 5 year simulation. A Plexiglas master model representing a distal extension hemi-arch inferior with teeth 43 and 44 prepared for crowns and absence of teeth 45, 46 and 47 was made for photoelastic analysis. Crowns were cast in Ni-Cr, with male attachments on the distal of tooth 44. PPR structures were merged and the female attachments captured. Artificial teeth 45 and 46 were mounted on the saddle. Prepared teeth 43 and 44 with roots simulating the periodontal ligament were positioned in the master model and the photoelastic resin was poured. Analyses were performed in three different applications of force (15N) in the distal: specific on teeth 45 and 46 and simultaneously on teeth 44 and 46. Cycled semirigid and resilient attachments generated more tension on the most distal points located at the edge and load application on the distal of tooth 46 was the one that generated the least stress on the abutment teeth for all attachments, new and cycled.