53 research outputs found

    A case study on how design theory can be used to create guidelines to use when designing user friendly surveillance systems

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    Designprinciper anvĂ€nds av interaktionsdesigners för att underlĂ€tta skapandet av anvĂ€ndarvĂ€nlig design genom att fĂ„ dessa att tĂ€nka pĂ„ olika aspekter av designen. Dessa principer har vidareutvecklats sedan uppkomsten pĂ„ 1990-talet och idag anvĂ€nds de ofta inom interaktionsdesign. Genom att anvĂ€nda sig av dessa designprinciper kan dĂ„lig design undvikas och dĂ€rmed minska frustration hos anvĂ€ndaren. Designmönster beskrivs som strukturella och beteendemĂ€ssiga egenskaper som förbĂ€ttrar miljön för exempelvis anvĂ€ndargrĂ€nssnitt. Dessa egenskaper kan bidra till att göra saker lĂ€ttare att förstĂ„ eller förbĂ€ttra dess utseende, de gör verktyg mer anvĂ€ndbara. Syftet med denna uppsats Ă€r att ta fram ett antal designriktlinjer vid utformning av övervakningssystem. Det leder fram till frĂ„gestĂ€llningen: Vilka riktlinjer med fokus pĂ„ interaktionsdesign bör anvĂ€ndas vid utformning av anvĂ€ndarvĂ€nliga övervakningssystem? För att ta reda pĂ„ hur interaktion med övervakningssystem fungerar sĂ„ har vi samarbetat med Saab Electronic Defence Systems dĂ€r vi undersökt interaktionen med deras radarövervakningssystem ”Giraffe AMB”. Undersökningen bestod av observationer och intervjuer av personal pĂ„ Saab. Detta för att fĂ„ en bred bild av den insamlade datan att analysera. Resultatet av undersökningen analyserades och vi kom fram till en del riktlinjer som baseras pĂ„ tre teman och i vĂ„r slutsats presenteras tydlighet och konsekvens som tvĂ„ Ă„terkommande begrepp och ses som uppsatsen bidrag till den akademiska vĂ€rlden. Anledningen till detta Ă€r att begreppen tror vi Ă€r viktiga för att kunna tackla övervakningssystemens komplexitet och stora mĂ€ngd information som presenteras.Design principles are usually used by interaction designers to help creating a user friendly design by making the designer think about the different aspects of the design. These design principles has been further developed since they emerged in the 1990s, and today they're often used in the field of interaction design. By using the design principles, bad design can be avoided and the frustration of the user reduced. Design patterns is described as structural and behavioral characteristics to improve the environment in user interface amongst other areas. These characteristics could make things easier to understand or improve their appearance, they make tools more usable. The purpose with this essay is to identify design guidelinesto be used by developers when designing surveillance systems. The research question is: Which guidelines in the aspect of interaction design used as guidelines when designing user friendly surveillance systems? To examine the use of the system we observed Saab employees taking the roll as a radar operator. In addition to observing them we also interviewed the employees with hope of gathering data with wide range and depth. The result of our survey was analyzed and we determined some guidelines based on three themes, in the conclusion we identified two concepts that was a part of every guideline. Theese concepts are clarity and concistency and is our contribution to the field of research. This is to tackle the complexity of the surveillance system and large amount of information to interpret Resultatet av undersökningen analyserades och vi kom fram till en del riktlinjer som baseras pĂ„ tre teman och i vĂ„r slutsats presenteras tydlighet och konsekvens som tvĂ„ Ă„terkommande begrepp och ses som uppsatsen bidrag till den akademiska vĂ€rlden. Anledningen till detta Ă€r att begreppen tror vi Ă€r viktiga för att kunna tackla övervakningssystemens komplexitet och stora mĂ€ngd information som presenteras

    Dispersion and self-orientation of gold nanoparticles in sol–gel hybrid silica – optical transmission properties

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    International audienceSilica-based hybrid materials doped with gold nanoparticles (AuNPs) of different shapes were prepared with an adapted sol–gel technology (using MTEOS) and polished to high optical quality. Both spherical (23 and 45 nm in diameter) and bipyramidal (36, 50 and 78 nm in length) AuNPs were prepared and used as dopants. The AuNPs were functionalized with a novel silicone polymer for compatibilization with the sol–gel medium. The glass materials showed well defined localized surface plasmon resonance (SPR) absorbance from the visible to NIR. No redshifts in the spectra, due to the increase in doping concentration, were observed in the glasses, proving that no or very small SPR coupling effects occur. Spectroscopic Muller Matrix Ellipsometry showed that the shorter bipyramidal AuNPs (36 and 50 nm in length) have a clear preferred orientation in the MTEOS matrix, i.e. a tendency to be oriented with their long axis in the plane parallel to the glass surfaces. Dispersions of AuNPs have proven to be good optical power limiters that depend on particle size and geometry. The solid-state glass materials showed good optical power limiting at 532 nm for nanosecond pulses, which did not depend on the size or geometry of the AuNPs. In contrast to the observation at 532 nm, at 600 nm no optical limiting effect was observed. In these solids, as for dispersions of AuNPs, the optical limiting response is caused by scattering
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