This work is dedicated to development of city furniture (station shed, bench, litter box). The first part contains the analysis of city furniture (historical, technical and design). Second part is dedicated to the design decision in particular. The main goal was to contemplate the design of station shed, which will be totally defending from bad weather; bench design, which would be impossible to be used as a ‘bed for homeless’; litter box, which would be aesthetically matching the shed and the bench. Additional task was to contemplate canopies of various sizes, enabling the city to install same type of canopies regardless of the size. The suggested design has been influenced by aesthetics, ergonomics, technology and other important aspects of industrial design.

In this thesis, the propagation of transient waves in heterogeneous media and the tuning of periodic elastic materials are studied. The behaviour of time harmonic waves in complex media is a well understood phenomenon. The primary aim of this text is to gain a deeper understanding into the propagation of transient waves in periodic media. The secondary aim is to explore the time harmonic behaviour of two dimensional pre-stressed elastic media and investigate the plausibility of band gap tuning. We begin this text by investigating the reflection of pulses from a semi-infinite set of point masses (we call 'beads') on a string. The reflected pulse is formulated using Fourier transforms which involve the harmonic reflection coefficient. We find that the reflected amplitude of a harmonic wave depends on its frequency. We then ask whether it is possible to find an effective reflection coefficient by assuming the beaded portion of the string is given by some effective homogeneous medium. An effective reflection coefficient is found by assuming the homogeneous medium has the wavenumber given by the infinite beaded string. This effective reflection coefficient is compared to the exact reflection coefficient found using the Wiener-Hopf technique. The results from studying the reflection problem gave inspiration to chapter 4, which focuses on the time dependent forcing of an infinite beaded string that is initially at rest. We again use the Fourier transform to find a time dependent solution. The z-transform is then used, after sampling the solution at the bead positions. We impose a sinusoidal loading which is switched on at a specified time. In doing this we are able to explore how the system behaves differently when excited in a stop band, a pass band and at a frequency on the edge between the two. An exact solution for the infinite beaded string is found at any point in time by expanding the branch points of the solution as a series of poles. We compare this exact solution to the long time asymptotics. The energy input into the system is studied with the results from the exact solution and long time approximation showing agreement. Interesting behaviour is discovered on the two edges between stop and pass bands. In chapter 5 the effect of a nonlinear elastic pre-stress on the wave band structure of a two dimensional phononic crystal is investigated. In this chapter we restrict ourselves to incompressible materials with the strain energy functions used being the neo-Hookean, Mooney-Rivlin and Fung. The method of small-on-large is used to derive the equation for incremental elastic waves and then the plane wave expansion method is used to find the band structure. Finally, chapter 6 focuses on the same geometry with a compressible elastic material. The strain energy function used is the one suggested by Levinson and Burgess. We use the theory of small-on-large to derive the incremental equations for coupled small amplitude pressure and shear waves in this material. In both compressible and incompressible materials we show how it is possible to control the stop bands in a material by applying a large elastic pre-stress.

The increasingly widespread use of surveillance as a cornerstone of crime control presents novel challenges to questions about personal autonomy, stigmatization, and the shape of social processes. In New York City, the end of stop-and-frisk policing meant the rise of “omnipresence,” built on a progression of the surveillance infrastructure. For residents of NYCHA public housing developments in New York City, the installation of highly visible surveillance structures provokes questions about the role of surveillance in increasing contact with the criminal justice system, as well about how use of these structures redefines spaces against a background of gentrification, a globalizing real estate market, and unbuffered income stratification. This project uses ethnographic methods, including interviews and participant observation to explore the phenomenology of social processes undertaken by individuals in relation to surveillance structures and to interrogate the use of surveillance in public housing. Engaging with the work of Bourdieu, Lefebvre, Wacquant, Goffman, and Sassen, the dissertation explores social ordering, stigmatization, norm durability, and place-making among NYCHA residents. The experiences of residents of neighborhoods that are on both sides of the city-wide demographic shifts associated with gentrification are further contrasted, contextualizing their interactions at the macro and micro levels. At the policy level, NYCHA housing becomes a focus of crime control measures as if containing public housing will address the root causes of crime. On the ground, however, cameras do not work to prevent crime, even when they are in good repair. Lights may make some individuals feel safer walking through courtyards late at night, but those same individuals fear that danger is just beyond the reach of the lights in the stairwells or playgrounds. If the cameras and lights fail to allay the fears of those in public housing, if their experiences with the system of surveillance have proven unsuccessful in preventing crime, giving the feeling of safety, or helping to solve crime, what is their purpose? This study posits that these structures are a spectacle. They are structures heavily laden with symbolism that reassure non-residents and residents alike of the neutralization of NYCHA residents. This symbolic dynamic ultimately stigmatizes NYCHA residents and pushes them further towards the systemic edge. Among the theoretical implications of the dissertation’s conclusions are an enhanced understanding of the connections between the persistence of social inequality, the “terra non grata” of certain urban spaces, and the dismantling of the social welfare state. The practical implications of this work are significant and add to discourses around the function of technology in the creation of new types of barriers.

Abstract  The purpose of this bachelor thesis is to deepen the understanding of the role of civil servants and officials within public management when implementing public policy as the One-Stop-shop solution of public service. Previous research states that there is no evident blueprint for implementing a One-Stop-shop, where all contact and task management is redirected to one entrance point. This is something that requires involvement of many actors from different divisions of the municipality and poses a great challenge for the executive civil servants. To achieve the thesis’ purpose, the study will apply qualitative methods and gather empirical materials through interviews with civil servants within Uppsala municipality who are responsible for the implementation of the Uppala One-Stop-shop. The material was analyzed through qualitative text analysis and the main findings were somewhat favourable and states that in this case cross-level communication, vertically and horizontally, within the municipality has been crucial to the success of implementation by minimizing the occurrence of common obstacles as well as overcoming obstacles. Lastly the results and analysis are discussed to indicate the strengths and weaknesses of this single case.

abstract: X-ray free electron lasers (XFELs) provide several orders of magnitude brighter x-rays than 3rd generation sources. However, the electron beamlines and undulator magnets required are on the scale of kilometers, costing billions of dollars with only a half dozen or so currently operating worldwide. One way to overcome these limitations is to prebunch the electron beam on the scale of the x-ray wavelength. In this paper one such scheme is discussed, which uses a nanopatterned grating called a dynamical beam stop. This uses diffraction from crystal planes of the etched portion of a grating to impart a transverse modulation which becomes a temporal modulation via an emittance exchange (EEX). To expand upon this topic, dynamical electron diffraction intensities for a 200 nm thick Si(001) unpatterned membrane are simulated via the multislice method and compared to experiment for various crystallographic orientations at MeV energies. From this as well as an analysis of the experimental inelastic plasmon diffuse scattering, it is determined that the optimal transverse modulation would be formed from a bright field image of the beam stop, with the nanopattern being etched all the way through the membrane. A model quantifying the quality of the modulation - the bunching factor - as a function of contrast and duty factor is formulated and the optimal modulation is determined analytically. A prototype beam stop is then imaged in a transmission electron microscope (TEM) at 200 KeV, with the measured bunching factor of 0.5 agreeing with the model and approaching a saturated XFEL. Using the angular spectrum method, it is determined that the spatial coherence of the MeV energy electron beam is insufficient for significant self-imaging to occur for gratings with pitches of hundreds of nanometers. Finally, the first-order EEX input requirements for the electron beam are examined in the transverse dimension as are newly proposed longitudinal requirements to compensate for lingering correlations between the initial and final longitudinal phase spaces. / Dissertation/Thesis / Doctoral Dissertation Physics 2020

京都大学 / 0048 / 新制・課程博士 / 博士(理学) / 甲第21612号 / 理博第4519号 / 新制||理||1648(附属図書館) / 京都大学大学院理学研究科生物科学専攻 / (主査)教授 高田 昌彦, 教授 中村 克樹, 教授 髙井 正成 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DFAM

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The smartphone has quickly become the most used device to access the internet. Academic and public concern has been raised if overuse of smartphone technology can have detrimental effects on brain and behavior. Preliminary results suggest that excessive smartphone usage may be linked to impaired inhibitory control. The present study investigates whether such a relationship is present in a sample of healthy individuals with varying degrees of usage. To investigate the proposed relationship, the Stroop color and word task and the stop-signal task was utilized to measure inhibitory control, while screen time was utilized to measure duration of smartphone usage. A Pearson‘s correlation analysis and an independent t-test/Mann Whitney-U test analyzed the results, which did not yield statistical significance.

This work is dedicated to development of bus shelter. The first part contains the analysis of city furniture (technical and design). Second part is dedicated to the design decision in particular. The main goal was to contemplate the design of bus shelter, which will be totally defending from bad weather. Additional task was to contemplate canopies of various sizes, enabling the city to install same type of canopies regardless of the size. The suggested design has been influenced by aesthetics, ergonomics, technology and other important aspects of industrial design.

The diploma thesis deals with the possibilities of using technical analysis to trade on the financial markets, particularly in futures trading derived from stock market indexes. Specifically specifies selected trading system and then analyzes the results achieved by this system.