Face au développement des services à haute intensité technologique, se pose le problème de leur acceptation. En téléphonie mobile, les Français se rallient progressivement à ces services et cette thèse vise à comprendre cette adoption. La revue de littérature fondée sur l’adoption des innovations et son adaptation au domaine des services permet d’identifier les principaux facteurs qui influencent l’adoption des services à haute intensité technologique. Une étude qualitative exploratoire a permis d’enrichir notre cadre conceptuel que nous avons testé dans une seconde phase auprès de 350 utilisateurs de services mobiles. Finalement, la réalisation d’une étude de cas s’est avérée nécessaire pour expliquer le décollage des services de données en France à partir du lancement sur le marché d’un nouveau téléphone multifonction Smartphone en 2007-2008. Les résultats des trois études réalisées révèlent que les principaux construits du TAM sont pertinents pour expliquer l’utilisation des services à haute intensité technologique. Nos résultats mettent en valeur l’influence des communautés de marque dans le processus d’adoption des équipements et services mobiles. / With the development of technology-based services the question of the level of their acceptance was raised. In mobile communication, the French progressively adopt these services. This thesis aims to understand this adoption. The study of the literature in innovations adoption helped us to identify the main factors influencing technology-based services adoption. An exploratory quality study helped us to enrich our conceptual framework. The proposed model was evaluated by quantitative survey among 350 mobile services users. Finally, the execution of a case study proved itself necessary to explain the take-off of the mobile data services in France due to the launch of a multifunction Smartphone device. The results of the three studies reveal that the TAM constructions are pertinent in the explanation of the technology-based services usage. Our results highlight the influence of brand communities in the technology-based services adoption process.

Thèse d'exercice : Médecine. Médecine générale : Nantes : 2007. / Bibliogr.

In future, Mobile Ad Hoc Networks (MANETs) may provide access to services in the Internet. MANETs should therefore support diverse applications and data types. This introduces a need for quality of service (QoS), a process of discriminating different data types to provide them with an appropriate level of service. However, QoS can be affected by nodes performing packet forwarding attacks. A critical analysis of the related literature shows that research into QoS and security has typically proceeded independently. However, QoS and security should be considered together as attacks may adversely affect QoS. A simulation study demonstrates this by investigating two single-path packet forwarding approaches under a range of conditions. The study shows that using single-path packet forwarding in the presence of attackers is generally insufficient to support QoS.Based on this background research, a novel 2-Dimensional Adaptation ARChitecture (2-DAARC) and a Priority-based Multi-path Type Selection (PMTS) algorithm are proposed. 2-DAARC integrates two modes of adaptation. The single-path adaptation (SPA) mode uses adaptive bandwidth reservations over a single path for QoS in the presence of node mobility. The multi-path adaptation (MPA) mode uses duplicated data packet transmissions over multiple paths for QoS in the presence of packet forwarding attackers. Adaptation occurs within and between modes to optimize priority packet forwarding in the dynamic MANET environment. The MPA mode uses the PMTS algorithm to select a secondary path which is maximally-disjoint with the primary path. This aims to select a path which may enhance reliability whilst keeping the costs of path selection low. Simulating 2-DAARC shows that under light loads it achieves better QoS than related work, but with a higher control packet overhead. Simulating PMTS shows that under light loads it achieves packet deliveries which are at best as good as a related approach, with lower end-to-end delays and control packet overhead. A novel Congestion and ATtack (CAT) detection mechanism is proposed to improve the performance of 2-DAARC in heavily loaded networks. CAT detection differentiates the causes of packet loss so that adaptation can be better tailored to the network conditions. Without CAT detection, 2-DAARC uses the MPA mode in congested conditions, and this worsens QoS. Simulating 2-DAARC with CAT detection shows that it generally achieves packet deliveries which are greater than or similar to, and end-to-end delays which are less than or similar to related work, and it does so with a lower control packet overhead.

Reproduction de : Thèse d'exercice : Médecine. Médecine générale : Nantes : 2008. / Bibliogr.

Reproduction de : Thèse d'exercice : Médecine. Médecine générale : Nantes : 2008. / Bibliogr.

Reproduction de : Thèse d'exercice : Médecine : Nancy 1 : 2006. / Titre provenant de l'écran-titre.

Introdução: A mortalidade materna é aquela resultante de complicações diretas e indiretas da gravidez, parto ou puerpério, e um indicador de saúde da mulher bem como do desempenho dos sistemas de atenção à saúde. O Planejamento Familiar é considerado fundamental na diminuição das taxas de mortalidade materna. A implantação de estratégias efetivas de planejamento familiar no pós-parto (PFPP) poderia contribuir na diminuição das taxas de morbidade e mortalidade materna e infantil, bem como do número de gestações não planejadas e abortos inseguros. O uso de Tecnologias de Informação e Comunicação (TIC) em uma intervenção educativa em saúde de PFPP poderia ser considerado uma ferramenta complementar útil na atenção pós-natal. Objetivo: Determinar se o envio de mensagens de texto via Short Message Service (SMS) sobre PFPP, é um complemento útil para o acompanhamento pós-natal, incentivando o uso de anticoncepcional no pós-parto e o retorno à consulta de puerpério. Métodos: Ensaio clínico aleatorizado controlado por grupo . Realizado entre fevereiro de 2015 e junho de 2016 em Ribeirão Preto. Com 420 mulheres, 326 mulheres do grupo de controle e 94 mulheres do grupo com intervenção, cada grupo estava composto por 10 Unidades Básicas e Distritais de Saúde. Mulheres do grupo com intervenção, com idade igual ou superior a 18 anos e com idade gestacional inferior a 20 semanas, foram convidadas a cadastrar-se no programa, após o aceite de participação, foi enviado o primeiro grupo de mensagens com informações referentes ao parto e gravidez, este envio terminava após o parto. Dentro das primeiras 48 horas pós-parto a mulher era entrevistada na maternidade, sendo coletados dados sociodemográficos, e do histórico sexual e reprodutivo, quatro dias após o parto as mulheres do grupo com intervenção que aceitaram receber as mensagens após o parto, receberam o segundo grupo de mensagens durante oito semanas com informações sobre contracepção no pós-parto. No terceiro mês após o parto foram entrevistadas as 420 no domicílio, o uso de anticoncepcional no pós-parto e assistência à consulta puerperal foram avaliados como desfechos principais. Todas as mulheres assinaram o Termo de Consentimento Livre e Esclarecido. Resultados: A taxa total de uso de anticoncepcional foi de 92% no terceiro mês após o parto, 89% foram anticoncepcionais hormonais. Em relação á consulta puerperal, 76% das mulheres compareceram à consulta. 7 Conclusões: Não houve diferencia estatisticamente significante entre os grupos, talvez o impacto deste tipo de intervenção educativa pode ser diferente em outros contextos e regiões brasileiras onde a informação em saúde é mais defasada e as mulheres têm mais dificuldades no acesso ao serviço de saúde. Este foi o primeiro estudo da literatura que avaliou o impacto de mensagens educativas via SMS sobre uso de contraceptivos após três meses do parto. Além de promover informação através de SMS, numa linguagem de fácil entendimento para as mulheres sobre saúde reprodutiva, a proposta deste estudo possibilitou a participação ativa dessas mulheres, por possuir um sistema de mensagem de texto bidirecional. / Introduction: Maternal mortality is the result of direct and indirect complications of pregnancy, childbirth or puerperium, and an indicator of women\'s health as well as the performance of health care systems. Family Planning is considered to be crucial in reducing maternal mortality rates. The implementation of effective family planning strategies in the postpartum period (FPPP) could contribute to the reduction of rates of maternal and infant morbidity and mortality, as well as the number of unplanned pregnancies and unsafe abortions. The use of Information and Communication Technologies (CIT) in a FPPP health education intervention could be considered a useful complementary tool in postnatal care. Objective: To determine if the sending of text messages via Short Message Service (SMS) on FPPP is a useful complement to postnatal follow-up, encouraging postpartum contraceptive use and the return to puerperal consultation. Methods: Conglomerate-controlled randomized clinical trial. Held between February 2015 and June 2016 in Ribeirão Preto. With 420 women, 326 women from the conglomerate control and 94 women from the conglomerate with intervention, each conglomerate was composed of 10 Basic and District Health Units. Women of the conglomerate with intervention, aged 18 years or above and with gestational age less than 20 weeks, were invited to join the program, after accepting participation, was sent the first group of messages with information regarding delivery and pregnancy, this shipment ended after delivery. Within the first 48 hours postpartum, the woman was interviewed in the maternity ward, and socio-demographic data and sexual and reproductive history were collected. Four days after delivery, women from the conglomerate with intervention who accepted to receive postpartum messages received the second group of messages for eight weeks with information on postpartum contraception. In the third month after delivery, the 420 women were interviewed at home, postpartum contraceptive use and puerperal consultation were evaluated as the main outcomes. All the women signed the Free and Informed Consent Form. Results: The total contraceptive use rate was 92% in the third month after delivery, 89% were hormonal contraceptives. Regarding the puerperal consultation, 76% of the women attended the consultation. Conclusions: There was no statistically significant 9 difference between groups, perhaps the impact of this type of educational intervention may be different in other Brazilian contexts and regions where health information is more lagged and women have more difficulties in accessing the health service. This was the first study in the literature that evaluated the impact of educational messages via SMS on contraceptive use after three months of childbirth. In addition to promoting information through SMS, in a language that women can easily understand about reproductive health, the proposal of this study made possible the active participation of these women, because it has a two-way text message system.

Introdução: A mortalidade materna é aquela resultante de complicações diretas e indiretas da gravidez, parto ou puerpério, e um indicador de saúde da mulher bem como do desempenho dos sistemas de atenção à saúde. O Planejamento Familiar é considerado fundamental na diminuição das taxas de mortalidade materna. A implantação de estratégias efetivas de planejamento familiar no pós-parto (PFPP) poderia contribuir na diminuição das taxas de morbidade e mortalidade materna e infantil, bem como do número de gestações não planejadas e abortos inseguros. O uso de Tecnologias de Informação e Comunicação (TIC) em uma intervenção educativa em saúde de PFPP poderia ser considerado uma ferramenta complementar útil na atenção pós-natal. Objetivo: Determinar se o envio de mensagens de texto via Short Message Service (SMS) sobre PFPP, é um complemento útil para o acompanhamento pós-natal, incentivando o uso de anticoncepcional no pós-parto e o retorno à consulta de puerpério. Métodos: Ensaio clínico aleatorizado controlado por grupo . Realizado entre fevereiro de 2015 e junho de 2016 em Ribeirão Preto. Com 420 mulheres, 326 mulheres do grupo de controle e 94 mulheres do grupo com intervenção, cada grupo estava composto por 10 Unidades Básicas e Distritais de Saúde. Mulheres do grupo com intervenção, com idade igual ou superior a 18 anos e com idade gestacional inferior a 20 semanas, foram convidadas a cadastrar-se no programa, após o aceite de participação, foi enviado o primeiro grupo de mensagens com informações referentes ao parto e gravidez, este envio terminava após o parto. Dentro das primeiras 48 horas pós-parto a mulher era entrevistada na maternidade, sendo coletados dados sociodemográficos, e do histórico sexual e reprodutivo, quatro dias após o parto as mulheres do grupo com intervenção que aceitaram receber as mensagens após o parto, receberam o segundo grupo de mensagens durante oito semanas com informações sobre contracepção no pós-parto. No terceiro mês após o parto foram entrevistadas as 420 no domicílio, o uso de anticoncepcional no pós-parto e assistência à consulta puerperal foram avaliados como desfechos principais. Todas as mulheres assinaram o Termo de Consentimento Livre e Esclarecido. Resultados: A taxa total de uso de anticoncepcional foi de 92% no terceiro mês após o parto, 89% foram anticoncepcionais hormonais. Em relação á consulta puerperal, 76% das mulheres compareceram à consulta. 7 Conclusões: Não houve diferencia estatisticamente significante entre os grupos, talvez o impacto deste tipo de intervenção educativa pode ser diferente em outros contextos e regiões brasileiras onde a informação em saúde é mais defasada e as mulheres têm mais dificuldades no acesso ao serviço de saúde. Este foi o primeiro estudo da literatura que avaliou o impacto de mensagens educativas via SMS sobre uso de contraceptivos após três meses do parto. Além de promover informação através de SMS, numa linguagem de fácil entendimento para as mulheres sobre saúde reprodutiva, a proposta deste estudo possibilitou a participação ativa dessas mulheres, por possuir um sistema de mensagem de texto bidirecional. / Introduction: Maternal mortality is the result of direct and indirect complications of pregnancy, childbirth or puerperium, and an indicator of women\'s health as well as the performance of health care systems. Family Planning is considered to be crucial in reducing maternal mortality rates. The implementation of effective family planning strategies in the postpartum period (FPPP) could contribute to the reduction of rates of maternal and infant morbidity and mortality, as well as the number of unplanned pregnancies and unsafe abortions. The use of Information and Communication Technologies (CIT) in a FPPP health education intervention could be considered a useful complementary tool in postnatal care. Objective: To determine if the sending of text messages via Short Message Service (SMS) on FPPP is a useful complement to postnatal follow-up, encouraging postpartum contraceptive use and the return to puerperal consultation. Methods: Conglomerate-controlled randomized clinical trial. Held between February 2015 and June 2016 in Ribeirão Preto. With 420 women, 326 women from the conglomerate control and 94 women from the conglomerate with intervention, each conglomerate was composed of 10 Basic and District Health Units. Women of the conglomerate with intervention, aged 18 years or above and with gestational age less than 20 weeks, were invited to join the program, after accepting participation, was sent the first group of messages with information regarding delivery and pregnancy, this shipment ended after delivery. Within the first 48 hours postpartum, the woman was interviewed in the maternity ward, and socio-demographic data and sexual and reproductive history were collected. Four days after delivery, women from the conglomerate with intervention who accepted to receive postpartum messages received the second group of messages for eight weeks with information on postpartum contraception. In the third month after delivery, the 420 women were interviewed at home, postpartum contraceptive use and puerperal consultation were evaluated as the main outcomes. All the women signed the Free and Informed Consent Form. Results: The total contraceptive use rate was 92% in the third month after delivery, 89% were hormonal contraceptives. Regarding the puerperal consultation, 76% of the women attended the consultation. Conclusions: There was no statistically significant 9 difference between groups, perhaps the impact of this type of educational intervention may be different in other Brazilian contexts and regions where health information is more lagged and women have more difficulties in accessing the health service. This was the first study in the literature that evaluated the impact of educational messages via SMS on contraceptive use after three months of childbirth. In addition to promoting information through SMS, in a language that women can easily understand about reproductive health, the proposal of this study made possible the active participation of these women, because it has a two-way text message system.