Das 13. Internationale Oberflächenkolloquium war das erste Treffen in der neuen Veranstaltungsreihe Industry meets standardization and science (IMSAS), mit dem ein Forum für Entwickler, Fertigungstechniker, Normungsexperten und Wissenschaftlern geschaffen werden soll. Vom 12. bis zum 14. März 2012 haben wir in diesem Rahmen über das Thema Kanten und Radien informiert. Viele internationale Normen existieren bereits zur Spezifikation und Verifikation. In einigen Bereichen sind diese Festlegungen jedoch noch lückenhaft. Kanten und Radien sind dafür ein perfektes Beispiel. Default Angaben zu Toleranzzonen und Verifikationsfestlegungen zur Extraktion, Filterung und Assoziation werden benötigt, um Spielräume bei der Interpretation und Bewertung auszuschließen und die Funktion eindeutig beschreiben zu können. Unsere Ziele für das Kolloquium waren die Einführung der neuen Veranstaltungsreihe IMSAS, die Information der Teilnehmer über den aktuellen Stand der Normung auf dem Gebiet von Kanten und Radien, die Präsentation von Problemstellungen und aktuell verfügbaren Lösungen zu diesem Thema und die Ableitung des zukünftigen Normungs- und Entwicklungsbedarfs auf diesem Gebiet. Das Kolloquium wurde vom Institut für Fertigungsmesstechnik und Qualitätssicherung IFMQ (Prof. M. Dietzsch und Dr.-Ing. Sophie Gröger ) der Technischen Universität Chemnitz in Zusammenarbeit mit dem Normungsauschuss Technische Grundlagen (NA 152) (J. Zymnossek) des Deutschen Instituts für Normung (DIN) organisiert.

Shear sheltering is defined as the effect of the mean flow velocity profile in a boundary layer on the turbulence caused by an imposed gust. In aeroacoustic applications turbulent boundary layers interacting with blade trailing edges or roughness elements are an important source of sound, and the effect of shear sheltering on these noise sources has not been studied in detail. Since the surface pressure spectrum below the boundary layer is the primary driver of trailing edge and roughness noise, this thesis considers the effect that shear sheltering has on the surface pressure spectrum below a boundary layer. This study presents a model of the incoming turbulence as a vortex sheet at a specified height above the surface and shows, using canonical boundary layers and approximations to numerical results, how the mean flow velocity profile can be manipulated to alter the surface pressure spectrum and hence the associated trailing edge noise. The results from this model demonstrate that different mean velocity profiles drive significant changes in the unsteady characteristics of the flow. The surface pressure fluctuations results also suggest that boundary layers where the shear in the mean velocity profile is significant can be beneficial for the reduction of trailing edge noise at particular frequencies. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2020. / FAU Electronic Theses and Dissertations Collection

Placement of virtual objects in Augmented Reality is often done without regarding the artifacts in the physical environment. This thesis investigates how placement can be done with the artifacts included. It only considers placement of wall mounted objects. Through the development of two prototypes, using detected edges in RGB-images in combination with volumetric properties to identify the artifacts, arreas will be suggested for placement of virtual objects. The first prototype analyze each triangle in the model, which is an intensive and with low precision on the localization of the physical artifacts. The second prototype analyzed the detected RGB-edges in world space, which proved to detect the features with precise localization and a reduce calculation time. The second prototype manages this in a controlled setting. However, a more challenging environment would possibly pose other issues. In conclusion, placement in relation to volumetric and edge information from images in the environment is possible and could enhance the experience of being in a mixed reality, where physical and virtual objects coexist in the same world. / Placering av virtuella objekt i Augumented Reality görs ofta utan att ta hänsyn till objekt i den fysiska miljön. Den här studien utreder hur placering kan göras med hänsyn till den fysiska miljön och dess objekt. Den behandlar enbart placering av objekt på vertikala ytor. För undersökningen utvecklas två prototyper som använder sig av kantigenkänning i foton samt en volymmetrisk representation av den fysiska miljön. I denna miljö föreslår prototyperna var placering av objekt kan ske. Den första prototypen analyserar varje triangel i den volymmetriska representationen av rummet, vilket visade sig vara krävande och med låg precision av lokaliseringen av objekt i miljön. Den andra prototypen analyserar de detekterade kanterna i fotona och projicerar dem till deras positioner i miljön. Vilket var något som visade sig hitta objekt i rummet med god precision samt snabbare än den första prototypen. Den andra prototypen lyckas med detta i en kontrollerad miljö. I en mer komplex och utmanande miljö kan problem uppstå. Placering av objekt i Augumented Reality med hänsyn till både en volymmetrisk och texturerad representation av en miljö kan uppnås. Placeringen kan då ske på ett mer naturligt sätt och därmed förstärka upplevelsen av att virtuella och verkliga objekt befinner sig i samma värld.

Denna uppsats innehåller en kvantitativ studie som syftar till att undersöka det kriminologiska fenomenet edges enligt Brantingham & Brantingham (1993). Edges är förklarade som en kriminogen miljö som attraherar ett högt antal predatory crimes (a.a.).Studien var utförd i en svensk kontext i staden Malmö, där nio centrala delområden inkluderades, bestående av totalt 218 gator: Gamla Staden, Lugnet, Möllevången, Norra Sofielund, Rådmansvången, Södervärn, Södra Sofielund, Västra Sorgenfri och Östra Sorgenfri. Antalet anmälda personrån under en treårsperiod (2013-2015) jämfördes med edges, bestående av de nämnda 218 gatorna som via observationer blivit indelade i tre kategorier (ingen edge, svag edge och skarp edge). Syftet med studien var att undersöka om där existerar ett signifikant samband mellan predatory crimes och edges.Resultaten visade att där finns ett svagt signifikant samband mellan antalet personrån och edges. Forskarna för studien upptäckte även att där kanske existerar ett samband mellan längden på en gata och huruvida gatan är en edge eller inte. Studiens slutsats är att mera vetenskaplig forskning rörande edges i en svensk kontext behövs i syfte att kunna fastställa ifall fenomenet är av vikt för svensk kriminologi. / This paper contains a quantitative study which aims to examine the criminological phenomena edges according to Brantingham & Brantingham (1993). Edges are explained as a criminogenic environment, which attracts a high number of predatory crimes (a.a.).The study was performed in a Swedish context in the city of Malmö, including nine central districts consisting of a total of 218 streets: Gamla Staden, Lugnet, Möllevången, Norra Sofielund, Rådmansvången, Södervärn, Södra Sofielund, Västra Sorgenfri and Östra Sorgenfri. The number of reported person robberies during a three year period (2013-2015) were compared to edges, consisting of the mentioned 218 streets who trough observations were split into three categories of edges (no edge, weak edge and sharp edge). The aim with the study was to examine if there exists a significant relation between predatory crimes and edges.The results showed that there is an existing but weak significant relation between the number of reported person robberies and edges. The scientists of the study also discovered that there may exist a relation between the length of the streets and whether the streets are an edge or not. The conclusion from the study is that more scientific research concerning edges in a Swedish context is needed in aim to have the ability to conclude if the phenomena is of real importance for Swedish criminology.

Low aspect ratio, highly-swept cranked arrow wing planforms are often proposed for high-speed civil transports. These wing planforms offer low supersonic drag without suffering greatly from low lift/drag ratios in low-speed flight. They can, however, suffer from pitch-up at modest angles of attack (as low as 5°) during low-speed flight due to leading edge vortex influence, flow separation and vortex breakdown. The work presented here describes an investigation conducted to study past research on the longitudinal aerodynamic characteristics of highly-swept cranked wing planforms, the development of a new method to estimate pitch-up of these configurations, and the applications of this new method to the analysis of tail designs for trim at high lift coefficients. The survey of past research placed emphasis on 1) understanding the problem of pitch-up, 2) ascertaining the effects of leading and trailing edge flaps, and 3) determining the benefits and shortfalls of tail, tailless, and canard configurations. The estimation method used a vortex lattice method to calculate the inviscid flow solution. Then, the results were adjusted to account for flow separation on the outboard wing section by imposing a limit on the equivalent 2-D sectional lift coefficient. The new method offered a means of making low cost estimates of the nonlinear pitching moment characteristics of slender, cranked arrow wing configurations with increased accuracy compared to conventional linear methods. Numerous comparisons with data are included. The new method was applied to analyze the trim requirement of slender wing designs generated by an aircraft configuration optimization and design program. The effects of trailing edge flaps and horizontal tail on the trimmed lift coefficient was demonstrated. Finally, recommendations were made to the application of this new method to multidisciplinary design optimization methods. / Master of Science

No / Department of Health

Using a general, unsteady, nonlinear vortex lattice method, the aerodynamic loads have been found on a 75° delta wing with and without leading edge vortex flaps. The flap had an area approximately 26 percent of the wing area with a constant chord of 6.7 percent of the wing mean aerodynamic chord and was deflected at 30°. Results for lift, drag, axial force, and pitching moment coefficients are compared with experimental data and show very good agreement. Individual pressure difference coefficients along the wing and flap are also presented and compared with experimental data. Overall, the method shows the leading edge vortex flap to be very effective in reducing drag while maintaining lift comparable to that of the plain wing. / Master of Science

[pt] Neste trabalho, estudamos superfícies com curvatura média afim zero. Elas são chamadas de superfícies mínimas afins e para superfícies convexas, também são chamadas de superfícies máximas afins. Provamos que uma superfície mínima euclidiana também é uma superfície mínima afim se, e somente se, as linhas de curvatura da superfície mínima euclidiana conjugada são planas. Para uma superfície máxima afim, descrevemos como recuperá-la do campo de vetor conormal ao longo de uma determinada curva. Para algumas escolhas do vector conormal, a superfície máxima é singular e descrevemos as condições sob as quais as singularidades são arestas cuspidais ou swallowtails. / [en] In this work we study surfaces with zero affine mean curvature. They are called affine minimal surfaces and for convex surfaces, they are also called affine maximal surfaces. We prove that an euclidean minimal surface is also an affine minimal surface if and only if the curvature lines of the conjugate euclidean minimal surface are planar. For an affine maximal surface, we describe how to recover it from the conormal vector field along a given curve. For some choices of the conormal vector, the maximal surface is singular and we describe conditions under which the singularities are cuspidal edges or swallowtails.

No Estado de São Paulo, dentro de uma mesma zona climática, a floresta estacional semidecidual e o cerradão são comumente encontrados dividindo o espaço. Atualmente, essas duas formações encontram-se reduzidas a pequenos fragmentos florestais, em estágio avançado de perturbação. Com a fragmentação da floresta, há um aumento da luminosidade nas bordas dos remanescentes florestais e lianas heliófitas podem aumentar suas populações e competir vigorosamente com as espécies arbustivo-arbóreas. O objetivo desse estudo foi verificar o efeito do manejo das lianas sobre o processo de restauração florestal em bordas perturbadas de floresta estacional semidecidual e de cerradão. Também foi analisada a influência do tipo de vizinhança sobre a borda florestal e sobre os resultados do manejo. O experimento foi instalado na região de Santa Rita do Passa Quatro, SP, em bordas de floresta estacional semidecidual, com vizinhanças de cana-de-açúcar e rodovia e em bordas de cerradão, com vizinhanças de eucalipto, cana-deaçúcar e rodovia. O delineamento experimental foi de blocos casualizados, com parcelas de 100m2 e 3 repetições. Nas bordas de floresta estacional semidecidual foram testadas 3 técnicas de manejo: corte de lianas (C), corte de lianas + revolvimento do solo (CR) e corte de lianas + plantio de espécies arbóreas nativas (CP). Nas bordas de cerradão foram testadas 2 técnicas de manejo: corte de lianas (C) e corte de lianas + revolvimento do solo (CR). Para análise do processo de restauração florestal, foram avaliados o crescimento médio em altura e diâmetro das espécies arbustivoarbóreas, a mortalidade média e o número médio de indivíduos ingressantes no estrato arbustivoarbóreo, a chuva de sementes e a mortalidade média e o número médio de indivíduos ingressantes no estrato da regeneração. Nas duas formações florestais, verificou-se uma diminuição na riqueza de espécies arbustivo-arbóreas e no número de árvores de maior porte, no sentido das bordas com vizinhança de eucalipto, para as bordas com vizinhanças de cana-de-açúcar e rodovia, respectivamente. Tanto nas bordas de floresta estacional semidecidual, quanto de cerradão, os resultados do manejo das lianas foram influenciados pelo grau de infestação por lianas, pela estrutura da vegetação recém manejada, pelas espécies presentes e pela vizinhança do fragmento florestal. Embora na maioria dos casos as diferenças não tenham sido significativas, efeitos positivos do corte das lianas foram observados para o crescimento médio em altura ou diâmetro dos indivíduos, principalmente nas áreas mais infestadas. No entanto, nas bordas com vizinhança de rodovia, o corte das lianas pode intensificar os efeitos de borda, a ponto de prejudicar o ingresso das espécies arbustivo-arbóreas no estrato da regeneração. Nas bordas de floresta estacional semidecidual, o corte das lianas não será suficiente para promover a recuperação da fisionomia florestal, pois os indivíduos presentes sob as lianas correspondem a espécies de subbosque, sendo necessário o enriquecimento das bordas com espécies de dossel. Nas duas formações florestais, o revolvimento superficial do solo não favoreceu a regeneração das espécies arbustivo-arbóreas. / In São Paulo state, throughout the same climatic zone, semideciduous forests and cerradão patches commonly share the same geographic area. Currently, these two formations are reduced to small fragments, in advanced stage of disturbance. Along with the fragmentation of the forest, there is an increase in ligth incidence at the edges and lianas generally increase their populations, competing vigorously with trees and shrubs species. The objective of this study was to verify the effect of management of lianas on the processe of restoration of forest physionomy in disturbed edges of semideciduous forest and cerradão. It was also analyzed the influence of matrix on the edge of forests and the results of liana removal management. The experiment was installed in Santa Rita do Passa Quatro, SP, on the edges of semideciduous forest fragments surrounded by sugar cane and roads, and cerradão fragments bordered by eucalyptus plantations, sugar cane and roads. The experimental design was randomized with blocks of plots of 100m2 and 3 replications. At the edges of semideciduous forest three techniques of management were tested: cutting of lianas (C), cutting of lianas + revolving surface soil (CR) and cutting of lianas + planting of native tree species (CP). On the edges of cerradão two management alternatives were tested: cutting of lianas (C) and cutting of lianas + revolving surface soil (CR). To analyze the process of restoration of forest physionomy, we assessed the average growth in height and diameter of tree and shrub species, the average mortality and average number of individuals entering the tree stratum, the rain seed, the average mortality and the average number of individuals entering the stratum of regeneration. In both forests, there was a decrease in the richness of tree and shrub species and the number of larger trees from areas surrounded by eucalyptus to areas in a matrix of sugar cane and road. The results of lianas management, both on semideciduous forest and cerradão, were influenced by the degree of infestation, by the structure of vegetation recently managed, by the species composition and by the nature of surrounding matrix. Although in most cases the differences were not significant, positive effects of cutting lianas were observed on the average growth in height or diameter of the individual, mainly in the most infested areas. However, when the edges are contiguous to roads, lianas removal may intensify edge effects, as to disturb the number of individuals entering the stratum of regeneration. On semideciduous forests, cutting the lianas on the edges alone will not be enough to promote the recovery of the forest structure, because individuals providing support for lianas are understory species, being necessary the enrichment of the edges with the tree canopy species. In both forests, the revolving surface soil did not favor the regeneration of arbustive-arboreal species.

A tese desenvolvida neste trabalho trata de formas específicas de produção do espaço nas regiões de fronteira urbana. Investiga o caso de dois assentamentos clandestinos localizados no extremo da zona leste da cidade de São Paulo. Nossa hipótese identifica o início da década de 80 como um ponto de inflexão na dinâmica espacial da cidade, provocada por novos marcos regulatórios e pela ação de movimentos de luta por moradia. significa ainda uma tentativa de nomear processos e práticas relacionadas a formas específicas de apropriação do espaço, diferenciando do conceito de periferia, que não mais compreende a dinâmica espacial sócio-espacial da cidade nestas regiões. / This tesis deals with specific forms of the prodution of space at the edges of the city. It investigates the case of two illegal settlements located 22km from the city centre, at east zone. Our hypothesis sees the early 80\'s as a turning point in the spacial dynamics of the city, caused firstly by the introduction of new reglatory framework and secondly, by the rise of organized land occupation movements for housing. A central question is the attempt to nominate a set of processes and practices related to specific forms of space appropriation, that differentiate themselves from the ones practiced in the traditional concept of peripheral growth and that no longer follow the old socio-spacial city dinamic in these regions.