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Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.

Aedes aegypti Linnaeus, 1762 es una especie de Diptero que pertenece a la familia Culicidae, subgénero Stegomyia Theobald, 1901. La investigación túvo como objetivos: Realizar vigilancia epidemiológica de Aedes aegypti en el distrito de Villa El Salvador, determinar indicadores entomológicos: Índice Aédico (IA), Índice de Recipientes (IR) e Índice de Breteau (IB) y si existía diferencias significativas entre ellos. Para ellos se realizó un diseño de estudio donde se incluye el protocolo establecido por el Ministerio de Salud para el estudio de la localidad, visita a las viviendas y colección de muestras. Al comparar las fluctuaciones de los Índices Entomológicos (IE): Índice Aédico (IA), Índice de Recipientes (IR) e Índice de Breteau (IB), por sectores y meses se observó que no existieron diferencias estadísticamente significativas. Solo se halló foco positivos de Aedes aegypti durante los meses de Marzo y Abril en los sectores 2 y 3 respectivamente. Aun cuando se focalizó el análisis para los dos meses y sectores, estadísticamente no se encontraron diferencias significativas ni riesgo entomológico; esto último de acuerdo a los porcentaje establecidos en la estratificación de riesgo entomológico.Aedes aegypti Linnaeus, 1762 is a species of Diptera that belongs to the Culicidae family, subgenus Stegomyia Theobald, 1901. This study aimed to: perform a surveillance of Aedes aegypti in the district of Villa El Salvador, determine the entomological indicators: Aédico Index (AI), Container Index (RI) and Breteau Index (BI) and if there were significant differences between them. For those purposes, it a study design that includes the established Ministry of Health protocol for the study of the town, home visitings and sample collection. When comparing the fluctuations of the Entomological indices (EI): Aédico Index (AI), Container Index (RI) and Breteau Index (BI), by sector and months, no statistically significant differences were observed. The only positive focus for Aedes aegypti was found during the months of March and April in sectors two and three, respectively. Although further analysis was focused for the two months and sectors mentiones, no statistically significant differences or entomological risk was found, the latter according to the percentage specified in entomological risk stratification

Approved for public release; distribution is unlimited / The thesis research examines the emergence of wireless technology as a pragmatic baseline supporting the goals of the Department of Defense developing towards Network Centric Forces. Increased international attention to the field of surveillance has developed parallel to the desire to interconnect all possible friendly forces in military operations and the Global War on Terror (GWOT). Ubiquitous surveillance is accomplished by prototyping a network node that is then integrated on board of a military type unmanned aerial vehicle (UAV). Although the commercial off the shelf network solution itself is broadly deployed, little is known so far how to operate and manage an airborne surveillance network node. The author shows that the use of unmanned aerial vehicles for networking purposes is not only possible but also manageable, even with remote operation of the unmanned aerial vehicle. The documented experiments over three generations of prototypes give insight about possibilities of how network infrastructure independence for the purpose of surveillance can be reached. / Kapitänleutnant, Federal German Navy

CHDS State/Local / After mainland United States suffered a violent attack upon its citizenry, Homeland Security professionals recognized the need to protect a growing number of critical infrastructure locations. Millions of dollars earmarked for emergency management programs were funneled into technologies that enabled public safety to â do more with less." Closed circuit television surveillance systems rocketed to the forefront as the must-have technology. Citizens of the United States became subject to video surveillance during their normal daily routines. This thesis examines the management of CCTV systems used by municipal police departments and analyzes the policies created to control the technology and prevent abuse. Using U.S. Census Bureau data, the police departments responsible for protecting the 50 largest cities were contacted and surveyed. The initial step determined what jurisdictions utilized surveillance cameras to monitor public domains. The follow-up steps gathered information about the systems being used; the management decisions regarding where to place the cameras; the training for its operators; supervision standards; the written policies regulating the department's program; analyzing those directives; and finally, presenting step-by-step recommendations for implementing CCTV surveillance systems for Homeland Security use. / Captain, Philadelphia Police Department

CIVINS / The US Navy has identified a need for an autonomous, persistent, forward deployed system to Detect, Classify, and Locate submarines. In this context, we investigate a novel method for multiple sensor platforms acting cooperatively to locate an uncooperative target. Conventional tracking methods based on techniques such as Kalman filtering or particle filters have been used with great success for tracking targets from a single manned platform; the application of these methods can be difficult for a cooperative tracking scenario with multiple unmanned platforms that have considerable navigation error. This motivates investigation of an alternative, set-based tracking algorithm, first proposed by Detweiler et al. for sensor network localization, to the cooperative tracking problem. The Detweiler algorithm is appealing for its conceptual simplicity and minimal assumptions about the target motion. The key idea of this approach is to compute the temporal evolution of potential target positions in terms of bounded regions that grow between measurements as the target moves and shrink when measurements do occur based on an assumed worst-case bound for uncertainty. In this thesis, we adapt the Detweiler algorithm to the scenario of cooperative tracking for persistent undersea surveillance, and explore its limitations when applied to this domain. The algorithm has been fully implemented and tested both in simulation and with postprocessing of autonomous surface craft (ASC) data from the PLUSNet Monterey Bay 2006 experiment. The results indicate that the method provides disappointing performance when applied to this domain, especially in situations where communication links between the autonomous tracking platforms are poor. We conclude that the method is more appropriate for a large N tracking scenario, with a large number of small, expendable tracking nodes, instead of our intended scenario with a smaller number of more sophisticated mobile trackers. / CIVINS / US Navy (USN) author.

Following colonoscopic polypectomy, US Multisociety Task Force (USMSTF) guidelines stratify patients based on risk of subsequent advanced neoplasia (AN) using number, size, and histology of resected polyps, but have only moderate sensitivity and specificity. We hypothesized that a state-of-the-art statistical prediction model might improve identification of patients at high risk of future AN and address these challenges. Data were pooled from seven prospective studies which had follow-up ascertainment of metachronous AN within 3-5 years of baseline polypectomy (combined n = 8,228). Pooled data were randomly split into training (n = 5,483) and validation (n = 2,745) sets. A prognostic model was developed using best practices. Two risk cut-points were identified in the training data which achieved a 10 percentage point improvement in sensitivity and specificity, respectively, over current USMSTF guidelines. Clinical benefit of USMSTF versus model-based risk stratification was then estimated using validation data. The final model included polyp location, prior polyp history, patient age, and number, size and histology of resected polyps. The first risk cut-point improved sensitivity but with loss of specificity. The second risk cut-point improved specificity without loss of sensitivity (specificity 46.2 % model vs. 42.1 % guidelines, p < 0.001; sensitivity 75.8 % model vs. 74.0 % guidelines, p = 0.64). Estimated AUC was 65 % (95 % CI: 62-69 %). This model-based approach allows flexibility in trading sensitivity and specificity, which can optimize colonoscopy over- versus underuse rates. Only modest improvements in prognostic power are possible using currently available clinical data. Research considering additional factors such as adenoma detection rate for risk prediction appears warranted.

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Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.

Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.