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We show how a difference in the correlation length longitudinally and transversely, with respect to the jet axis in e+e- annihilation, arises naturally in a model for Bose-Einstein correlations based on the Lund string model. The difference is more apparent in genuine three-particle correlations and they are therfore a good probe for the longitudinal stretching of the string field.
Popular Abstract in Swedish Spionen var under kalla kriget en gäckande gestalt som i egenskap av sin synliga osynlighet blev en orienteringspunkt för vardagliga fantasier. Han – för denna det kalla krigets emblematiska figur var oftast en han – blev i flera avseenden just en samtidens mittpunkt i vilken en tudelad världsbild synliggjordes. Mannen i mitten handlar om Spionen i svensk kallakrigskultThe aim of this thesis is to contribute to a broadening of perspectives on Cold War Sweden. It is a study not primarily of the explicit political events or debates, but of the everyday cultural narratives of the era. During the long 1950s, Swedish Cold War imagination was largely characterised by a determination to maintain total security in the response to the threats that loomed on all sides, an
I rapportens inledning redovisas tidigare utarbetat förslag till egenskapsklassifikation för BSAB-systemet. I följande avsnitt analyseras uppbyggnaden av två olika system för redovis-ning av egenskaper, CIB Master List och OCCS:s egenskapsklassifikation. För båda har en jämförelse gjorts med BSAB-systemets egenskapsklassifikation. Resultatet visar att BSAB:s egenskaps¬klassifi¬kation ger möjlighet
Popular Abstract in Swedish Under 1990-talet fick gentekniken sitt verkliga genombrott – både forskningsmässigt och i människors medvetande. Medierna rapporterade nästan varje vecka om nya forskningsgenombrott. Klonade djur, lokaliserade gener, förhoppningar om nya läkemedel och larmrapporter om genförändrad mat är några exempel på vad de svenska massmedierna har berättat om gentekniken under 1990During the 1990’s gene technology got a break-through – both as a science and in people’s consciousness. Media reported frequently about scientific breakthroughs. Cloned animals, localized genes, hopes of new medicines and alarming reports on genetically modified food are a few examples on what Swedish mass media has reported on gene technology during the decade. The aim of the dissertation ”Dagen
GaAs and GaMnAs compounds grown by low temperature (LT) molecular beam epitaxy (MBE), are promising materials for fabricating novel devices. LT-GaAs has already been used in new devices, as it has subpicosecond carrier lifetimes, good carrier mobility and high dark resistivity. GaMnAs compounds are candidates for integrating ferromagnetic materials into semiconductor devices, as they can become fe
Two formulations of biphasic injectable bone substitutes have been developed for the treatment of bone defects and stabilisation of fragility fractures. The first formulation consists of a calcium sulphate matrix with embedded hydroxyapatite (HA) particles to provide osteoconductivity. The mechanical properties of this formulation were investigated by focussing on the factors affecting the compre
The history of Human Rights (HR) is often a story of success, where different obstacles have been overcome and the UN declaration of HR from 1948 marks the end of a centuries long struggle with different forces that has been against the fulfillment. In my article I question the often over-simplified understanding of the emergence of human rights standards and argue out of HR and religion that the
The paper analyses some properties that are obtained when using load current measurements to control DC-DC power converters. The analysis is made for the buck, boost, and buck-boost converters with current mode control. The two major properties obtained are low output impedance and an almost invariant control-to-output transfer function for different loads. It is shown that the use of the load cur
Sharp density features in protoplanetary discs, for instance at the edge of a magnetically dead zone, have recently been proposed as effective barriers to slow down or even stop the problematically fast migration of planetary cores into their central star. Density features on a radial scale approaching the disc vertical scaleheight might not exist, however, since they could be Rayleigh (or more ge
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