I stadens förändringsprocess, ständigt präglad av nya ideal, ska många intressen förenas och beaktas vid utformningen av skolgårdar. Med utgångspunkt i naturens betydelse för barns hälsa och utveckling undersöker denna studie två skolgårdar i Malmö utifrån tre perspektiv: skolgårdarnas utformning, högstadieelevers användning av och preferenser på skolgården samt planerarens prioriteringar och tillvägagångssätt vid utformningen av skolgårdsmiljöer. Syftet är, genom förståelse för hur dessa tre perspektiv kan förenas, öka kunskapen kring hur skolgårdarna kan planeras mer socialt och ekologiskt hållbart i den föränderliga staden. Detta undersöks med en mixad metod genom platsobservationer, enkätundersökningar och intervjuer. Empirin påvisar en relativt passiv inställning till skolgården bland eleverna, oberoende av skolgårdens storlek och mängd grönska samt att de överlag prioriterar social interaktion och mobilanvändande på rasterna. Tolkningen av det empiriska materialet utifrån teorin tyder på att det är grönskans kvalitet som påverkar elevernas intresse för att ta del av miljön. Genom intervjuerna framkom det att utformningen av ett grönt ramverk som erbjuder olika rumsligheter kan bidra till en mer jämlik, inkluderande och hållbar skolgårdsmiljö. Den ideala skolgårdsmiljön, som kan anses vara en där naturen företräds, speglar dock inte nödvändigtvis elevernas uppfattning av den ideala skolgården. Elevernas preferenser kan däremot få ta plats inom det hållbara ramverket, genom aktiv gestaltning. / Within the city's transformative process, constantly tinged by new ideals, different interests must be united and considered in the planning and design of school grounds. Based on the importance of nature for children's health and development, this study examines two school grounds in Malmö from three perspectives: the school grounds design and shape, the use and preferences of the students on the school grounds, and the planner´s priorities and proceedings in planning school ground environments. The purpose is, through an understanding of how these three perspectives can unite, to increase knowledge on how school grounds can be planned more socially and ecologically sustainable in the transformative city. This is investigated with a mixed method through site observations, surveys and interviews. The empirical evidence shows a relatively passive relation to the school ground among the students, regardless of the school grounds size and amount of greenery, and generally they prioritize social interaction and mobile phone use during breaks. The interpretation of the empirical material, based on the theory, indicates that it is the quality of the greenery that affects the student’s interest in using the environment. Through the interviews, it emerged that the design of a green framework that offers different spatialities can contribute to a more equal, inclusive and sustainable school ground. The ideal environment of the school ground, which can be considered one that is characterized by natural environments, does not necessarily reflect the student's ideal of it. The students' preferences can however be accommodated within the sustainable framework through continuous design.

Broadband spectral content is required to support ultrashort pulses. However this broadband content is subject to dispersion and hence the pulse duration of corresponding ultrashort pulses may be stretched accordingly. I used a commercially-available adaptive ultrashort pulse shaper featuring multiphoton intrapulse interference phase scan technology to characterise and compensate for the dispersion of the optical system in situ and conducted experimental and theoretical studies in various inter-linked topics relating to the light-matter interaction. Firstly, I examined the role of broadband ultrashort pulses in novel light-matter interacting systems involving optically co-trapped particle systems in which inter-particle light scattering occurs between optically-bound particles. Secondly, I delivered dispersion-compensated broadband ultrashort pulses in a dispersive microscope system to investigate the role of pulse duration in a biological light-matter interaction involving laser-induced cell membrane permeabilisation through linear and nonlinear optical absorption. Finally, I examined some of the propagation characteristics of broadband ultrashort pulse propagation using a computer-controlled spatial light modulator. The propagation characteristics of ultrashort pulses is of paramount importance for defining the light-matter interaction in systems. The ability to control ultrashort pulse propagation by using adaptive dispersion compensation enables chirp-free ultrashort pulses to be used in experiments requiring the shortest possible pulses for a specified spectral bandwidth. Ultrashort pulsed beams may be configured to provide high peak intensities over long propagation lengths, for example, using novel beam shapes such as Bessel-type beams, which has applications in biological light-matter interactions including phototransfection based on laser-induced cell membrane permeabilisation. The need for precise positioning of the beam focus on the cell membrane becomes less strenuous by virtue of the spatial properties of the Bessel beam. Dispersion compensation can be used to control the temporal properties of ultrashort pulses thus permitting, for example, a high peak intensity to be maintained along the length of a Bessel beam, thereby reducing the pulse energy required to permeabilise the cell membrane and potentially reduce damage therein.

This Master`s thesis is focused on through acquaintance of principles of the function circuits with switched capaticors and posibility of their application mainly in frequency filters or signal generators. The origin of the switched capacitor circuits is mentioned at the beginning of the work. There are references to the first scientific work and scientists who have dealt with this issue. Maxwell`s idea: lossy element (resistor) replace with lossless element (switched capacitor) in electric circuit, is further described. In the next chapter of this work are listed types of switching capacitors and their use in simple RC filters and in structures of inverted or noninverted integrators and their application in more complex higher order filters. The advantages and disadvantages of SC circuits versus circuit composed of discrete components are shown. It is also listed a simple low-pass switched RC filter implemented with analogue multiplexer 4053. Using the LTC1043 integrated circuit, which structure and properties are described and analyzed in detail in the work, the 1st order aktive or pasive low and high pass filters were designed and subsequently simulated in the computer simulator OrCAD PSpice v.10. Another chapter deals with the integrated circuits higher order filters, structure and properties of the integrated filter LTC1060 are further analyzed here. Except this IC there are mentioned integrated filters commercially less available from the corporations Linear Technology and Maxim. The main objective of thesis was to propose and establish laboratory device and laboratory measurment focused on the switched capacitor circuits. The laboratory device has been designed with integrated circuits LTC1043 and LTC1060, which is demonstrated by using passive and active integrator, 2nd order band-pass and 4th order band-pass with Chebyshevovou approximation.

Ultraprecision single point diamond turning is required to produce parts with sub-nanometer surface roughness and sub-micrometer surface profiles tolerances. These parts have applications in the optics industry, where tight form accuracy is required while achieving high surface finish quality. Generally, parts can be polished to achieve the desired finish, but then the form accuracy can easily be lost in the process rendering the part unusable. Currently, most mid to low spatial frequency surface finish errors are inspected offline. This is done by physically removing the workpiece from the machining fixture and mounting the part in a laser interferometer. This action introduces errors in itself through minute differences in the support conditions of the over constrained part on a machine as compared to the mounting conditions used for part measurement. Once removed, the fixture induced stresses and the part’s internal residual stresses relax and change the shape of the generally thin parts machined in these applications. Thereby, the offline inspection provides an erroneous description of the performance of the machine. This research explores the use of a single, high resolution, capacitance sensor to quickly and qualitatively measure the low to mid spatial frequencies on the workpiece surface, while it is mounted in a fixture on a standard ultraprecision single point diamond turning machine after a standard facing operation. Following initial testing, a strong qualitative correlation exists between the surface profiling on a standard offline system and this online measuring system. Despite environmental effects and the effects of the machine on the measurement system, the capacitive system with some modifications and awareness of its measurement method is a viable option for measuring mid to low spatial frequencies on a workpiece surface mounted on an ultraprecision machine with a resolution of 1nm with an error band of ±5nm with a 20kHz bandwidth. / Thesis / Master of Applied Science (MASc)