No description available.

<p>In almost every workplace today IT-systems have strong and significant roll in theeveryday work. It is therefore important that the systems have a good functionalityand that they work as an aid for the users. This thesis aims to study the systems atthe company Telge Nät and to analyse them from a usability perspective. By using thisperspective it has been obvious how difficult it is to make improvements on usability,once the system is in place. Even other larger improvements of the systems aredifficult to make at this stage and this is something that the users are aware of. Evenso, it seems that not enough investigation is made beforehand to make sure that thesystems are what the company is looking for.</p>

In almost every workplace today IT-systems have strong and significant roll in theeveryday work. It is therefore important that the systems have a good functionalityand that they work as an aid for the users. This thesis aims to study the systems atthe company Telge Nät and to analyse them from a usability perspective. By using thisperspective it has been obvious how difficult it is to make improvements on usability,once the system is in place. Even other larger improvements of the systems aredifficult to make at this stage and this is something that the users are aware of. Evenso, it seems that not enough investigation is made beforehand to make sure that thesystems are what the company is looking for.

No description available.

Powerful remote sensing techniques can covert time variability of polarization profiles of stellar spectral lines into vector magnetic fields maps of stellar surfaces. These techniques are widely applied to interpret observations but have been tested using only simplistic tests. It would be of interest to test magnetic inversion methods using polarization spectra simulated for realistic and physical models of stellar magnetic fields provided by recent 3D numerical simulations. Doppler Imaging is a method to reconstruct vector magnetic field maps of stellar surfaces from variation of polarization profiles. The work in this thesis presents numerical experiments to evaluate the performance of Magnetic Doppler Imaging (MDI) code INVERS10. The numerical experiments showed that in given high-resolution observations in four Stokes parameters, the code is capable of reconstructing magnetic field vector distributions, over the stellar surface, simultaneously and without any prior assumptions about the magnetic field geometry. Input data consists of polarization measurements in the line profiles and the reconstruction is performed by solving the regularized inverse problem. Right results were obtained by testing different type of models covering simple, complex and unusual complex magnetic field distribution. Whilst using incomplete Stokes parameter datasets containing only Stokes I and V profiles, the INVERS10 code was able to reconstruct a global stellar magnetic fields of only simple models and give accurate and reliable results. Testing the code with different inclination and azimuth angle successfully gave the lowest deviation when same values are used from the true map.

No description available.

<p>The company GEMS PET Systems produces cyclotrons which is a type of particle accelerator. The cyclotrons create log files that are analyzed by the company’s employees for different purposes like troubleshooting or installation. The purpose of the project is to with a usage-centered design method create a paper prototype of a tool that will help the employees to analyze the log files in a more efficient way than earlier.</p><p>The result shows how the usage-centered design method was used to create the paper prototype and how the user interface was created according to human-computer interaction (HCI).</p>

No description available.

The company GEMS PET Systems produces cyclotrons which is a type of particle accelerator. The cyclotrons create log files that are analyzed by the company’s employees for different purposes like troubleshooting or installation. The purpose of the project is to with a usage-centered design method create a paper prototype of a tool that will help the employees to analyze the log files in a more efficient way than earlier. The result shows how the usage-centered design method was used to create the paper prototype and how the user interface was created according to human-computer interaction (HCI).

Människans samspel med teknik har blivit allt mer vanligt förekommande. Detta medför en allt större vikt på användbarhet, något som lämpligen uppnås med hjälp av användarcentrerade designansatser. Forskningsfältet människa-datorinteraktion (MDI) är idag högst aktuellt och snabbt växande, men det har trots detta uppvisats ett gap mellan teori och praktik där de tekniker som vetenskapen presenterar ej tillämpas. En fallstudie med aktionsforskningsperspektiv utfördes för att få en förståelse för vilka aktiviteter från de användarcentrerade designansatserna som tillämpas, vilka som ej tillämpas, samt varför. Studien genomfördes på ett företag som arbetar med högteknologisk utveckling med hjälp av datainsamlingsteknikerna observation och intervju. Vidare studerades problemet även genom ett aktivt deltagande i en av företagets designprocesser. Resultatet tyder på ett bristande användbarhetsarbete och genom en integrering av den insamlade empirin och den teoretiska referensramen har sex rekommendationer för ökad användning av aktiviteter från de användarcentrerade designansatserna tagits fram.