| 1. |
- Hagberg, Hans E., et al.
(författare)
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Value of transsternal core biopsy in patients with a newly diagnosed mediastinal mass
- 2000
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Ingår i: Acta Oncologica. - 0284-186X .- 1651-226X. ; 39:2, s. 195-198
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Tidskriftsartikel (refereegranskat)abstract
- Histopathologic analysis of an anterior mediastinal mass of unknown origin is essential for treatment decision. Mediastinoscopy is the most common procedure performed to obtain biopsies, but general anaesthesia and hospitalization are necessary. The aim of this study was to evaluate whether transsternal core biopsies, an easy outpatient biopsy technique, could be an alternative to mediastinoscopy. A biopsy instrument that makes it possible to reach tumours hidden behind bone was used for transsternal CT-guided core biopsies in 21 patients with a newly diagnosed anterior mediastinal mass. No severe side effects were observed. In 19/21 (90%) patients the biopsies were diagnostic. In 2/21 patients additional biopsy techniques had to be used. In these two patients Hodgkin's disease was suspected in the first biopsy procedures. The diagnosis was confirmed by new core biopsies, from other parts of the tumour, not using a transsternal approach (transclavicular and parasternal, respectively). In addition, one mediastinoscopy was performed in a patient who was diagnosed with a non-Hodgkin's lymphoma but where more material was needed for lymphoma subclassification. It is concluded that CT-guided transsternal core biopsy is a clinically valuable method in patients with a newly diagnosed anterior mediastinal mass.
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| 2. |
- magnusson, Anders, et al.
(författare)
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Behaviour of the extensible elastica solution
- 2001
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Ingår i: International Journal of Solids and Structures. - 0020-7683. ; 38:46-47, s. 8441-8457
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Tidskriftsartikel (refereegranskat)abstract
- The general form of the virtual work expression for the large strain Euler–Bernoulli beam theory is derived using the nominal strain (Biot's) tensor. From the equilibrium equations, derived from the virtual work expression, it turns out that a linear relation between Biot's stress tensor and the (Biot) nominal strain tensor forms the differential equation used to derive the elastica solution. Moreover, in the differential equation one additional term enters which is related to the extensibility of the beam axis. As a special application, the well-known problem of an axially loaded beam is analysed. Due to the extensibility of the beam axis, it is shown that the buckling load of the extensible elastica solution depends on the slenderness, and it is of interest that for small slenderness the bifurcation point becomes unstable. This means the bifurcation point changes from being supercritical, which always hold for the inextensible case, i.e. the classical elastica solution, to being a subcritical point. In addition, higher order singularities are found as well as nonbifurcating (isolated) branches.
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| 3. |
- Magnusson, Anna-Karin, 1965-
(författare)
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Blinda personers icke-verbala kommunikation : studier om kroppsspråk, icke-verbal samtalsreglering och icke-verbala uttryck
- 2003
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The purpose of this thesis is to deepen the understanding of grown-up blind people’s non-verbal communication, including body expressions and paralinguistic (voice) expressions. More specifically, the thesis includes the following three studies: Blind people’s different forms of body expressions, blind people’s non-verbal conversation regulation and blind people’s experience of their own non-verbal expressions. The focus has been on the blind participants’ competence and on their subjective perspectives. I have also compared congenitally and adventitiously blind in all of the studies. The approach is mainly phenomenological and the qualitative empirical phenomenological psychological method is the primary methodological source of inspiration. Fourteen blind persons (and also some sigthed persons) participated. They have no other obvious disability than the blindness and their ages vary between 18 and 54. Data in the first two studies consisted of video recordings and data in the last study consisted of interviews. The overall results can be summarized in the following three points: 1. There are (almost) only similarities between the congenitally blind and adventitiously blind persons concerning their paralinguistic expressions. 2. There are mainly similarities between the two groups with respect to the occurrences of different body expressive forms. 3. There are also some differences between the groups. For example, the congenitally blind persons seem to have a limited ability to use the body in an abstract and symbolic way and they often mentioned that they have been told that their body expressions deviate from sighted people’s norms. But the persons in both groups also struggle to see themselves as unique persons who express themselves on the basis of their conditions and their previous experiences.
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| 4. |
- Magnusson, Christer, et al.
(författare)
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Method for insuring IT risks
- 2004
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Konferensbidrag (refereegranskat)abstract
- This paper explains in detail the method behind the insurance database Estimated Maximum information technology Loss (EMitL). The database has been a crucial tool to make it possible to insure IT perils. It helps to insure IT-perils financially in the same professional way as consequences of traditional perils like fire, flood, and robbery are insured, and thereby secures shareholders' investments. EMitL estimates the security awareness in an existing IT-platform. Based on that information, existing security measures can be "priced" as they may reduce the estimated maximum loss figures - and thereby the costs for the insurance. In addition, a more cost-effective decision can be made on additional security measures. Furthermore, the costs for the loss exposure inherent in a business service/product can be estimated in a better way, and thereby be incorporated in the product's price. The IT insurances are based on the traditional industries' classes: Liability, Loss of Property, and Business Interruption. The insurance class Liability is divided into insurance policies for: Business Interruption, Fraud and Embezzlement, Robbery and Theft, Defamation, Infringement of Privacy, and Infringement of code, trademark etc. The insurance policies in the class Loss of Property are: Fraud and Embezzlement, and Robbery and Theft. The database EMitL layers insurance covers, which is a common method in the insurance industry. This means that the insurance policies are layered according to the amount of financial cover they provide. The insurance levels relate and are converted to security levels. These levels are built on the IT security properties Integrity, Availability and Confidentiality, and are utilized differently, depending on the insurance level and the type of insurance policy. The properties and the levels constitute the base of the Security Polices produced by EMitL; they are used for the estimation of security awareness and as terms of insurance.
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| 5. |
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| 6. |
- Persson, Christer, et al.
(författare)
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Kvaliteten i uppmätta nederbördsmängder inom svenska nederbördskemiska stationsnät
- 2003
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- För att uppmätta föroreningshalter i vecko- eller månadsprover från de svenskanederbördskemiska stationsnäten EMEP, PMK (svenska Luft- och Nederbördskemiskanätet) och REG (regionala nederbördskemiska stationsnät, som drivs av IVLi flertalet län, här sammanförda till ett nät) ska vara riktiga krävs att den uppmättanederbördsmängden vid varje station och nederbördstillfälle är representativ för dennederbördsmängd som verkligen fallit. Korrekt bestämda föroreningshalter inederbörden är i sin tur en förutsättning för att den beräknade våtdepositionen ska blikorrekt. Detta gäller oavsett om våtdepositionsberäkningarna baseras enbart pånederbördskemiska mätdata eller om MATCH-Sverige modellen, som inkluderarförenklad dataassimilation av föroreningshalter, utnyttjas. Det är emellertid svårt attmäta upp korrekta nederbördsmängder, flera felkällor finns.I denna studie har en utvärdering gjorts av kvaliteten i uppmätta nederbördsmängderinom de svenska nederbördskemiska stationsnäten. Detta har gjorts med hjälp avobjektivt analyserade nederbördsfält över Sverige, baserade på SMHIs samtliganederbördsstationer samt fjärranalysdata. Resultaten visar att det under vissaperioder under 1998-2001 finns brister i kvaliteten för uppmätta nederbördsmängdervid de svenska EMEP-stationerna Aspvreten och Vavihill och att nederbördsmätningarnainom PMK- och REG-näten visar bristande kvalitet undervinterhalvåren. Det finns dessutom systematiska skillnader i uppsamlingseffektivitetmellan sommar- och vinterhalvår vid dessa båda stationsnät.
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| 7. |
- Wagner, Matthias, 1969-, et al.
(författare)
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Electronic structure of the neutral silicon vacancy in 4H and 6H SiC
- 2000
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Ingår i: Physical review. B, Condensed matter and materials physics. - 2469-9950. ; 62:24, s. 16555-16560
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Tidskriftsartikel (refereegranskat)abstract
- Detailed information about the electronic structure of the lowest-lying excited states and the ground state of the neutral silicon vacancy in 4H and 6H SiC has been obtained by high-resolution photoluminescence (PL), PL excitation (PLE), and Zeeman spectroscopy of both PL and PLE. The excited states and the ground states involved in the characteristic luminescence of the defect with no-phonon (NP) lines at 1.438 and 1.352 eV in 4H SiC and 1.433, 1.398, and 1.368 eV in 6H SiC are shown to be singlets. The orbital degeneracy of the excited states is lifted by the crystal field for the highest-lying NP lines corresponding to one of the inequivalent lattice sites in both polytypes, leading to the appearance of hot lines at slightly higher energies. Polarization studies of the NP lines show a different behavior for the inequivalent sites. A comparison of this behavior in the two polytypes together with parameters from spin resonance studies provides useful hints for the assignment of the no-phonon lines to the inequivalent sites. In strained samples an additional fine structure of the NP lines can be resolved. This splitting may be due to strain variations in the samples.
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| 8. |
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