HCCI combustion is well known and much results regarding its special properties have been published. Publications comparing the performance of different HCCI engines and comparing HCCI engines to conventional engines have indicated special features of HCCI engines regarding, among other things, emissions, efficiency and special feedback-control requirements. This paper attempts to contribute to th

An unlimited number of proteolytic reactions are carried out by enzymes in biological systems. These enzymes are a necessity of life, but they can also be dangerous if they are not controlled. Protease inhibitors regulate proteolytic enzymes by interacting and forming complexes with them, thereby preventing the substrate from gaining access to the active site of the enzyme. We have recently identi

We establish the local well-posedness for a new nonlinearly dispersive wave equation and we show that the equation has solutions that exist for indefinite times as well as solutions which blowup in finite time. Furthermore, we derive an explosion criterion for the equation and we give a sharp estimate from below for the existence time of solutions with smooth initial data.

The aim of this study was to analyze the composition of sway in adults and "healthy" elderly people and to evaluate the influence of vibration sensation and asymmetric vestibular function on the sway pattern. Ten adults with a mean age of 37.5 years and 40 healthy senior citizens with a mean age of 74.6 years living independently in the community were studied. Vibration-induced body sway was measu

PURPOSE: To determine the relevance of popliteal dilatations, knowledge of the normal popliteal artery diameter is essential. This study investigates the diameter of the popliteal artery in healthy males and females. METHODS: We measured the diameter of the popliteal artery in 121 healthy volunteers (59 males and 62 females), ages 8 to 81, with echo-tracking B-mode ultrasonography. We analyzed the

Popular Abstract in Swedish Denna avhandling beskriver hur fluorescens kan användas inom biomedicinområdet. Fluorescens är ett fenomen, som uppstår när molekyler absorberar inkommande ljus och sedan återutsänder ljus som har längre våglängd än det inkommande ljuset, och därför lägre energi, då en del av det absorberade ljuset omvandlats till värme i det omkringliggande mediet. I mänsklig vävnad fiThe main theme of this thesis is the use of fluorescence spectroscopy in biomedicine. The work presented in the thesis can be divided into three areas of applications. The first area involves the use of fluorescence to find the location of a deeply situated fluorophore within turbid media. Fluorescence emitted from the fluorophore will be attenuated when propagating through the medium, due to the

The budding yeast species Saccharomyces castellii has provided important new insights into molecular evolution when incorporated in comparative genomics studies and studies of mitochondrial inheritage. Although it shows some diversity in the specific molecular details, several analyses have shown that it contains many genetic pathways similar to those of S. cerevisiae. Here we have investigated th

Local-box hydrodynamical model atmospheres provide statistical information about the spatial dependence, as well as temporal evolution, of a star's emergent radiation field. Here, we consider late-type stellar atmospheres for which temporal changes of the radiative output are primarily related to convective (granular) surface flows. We derived relations for evaluating the granulation-induced, disk

This study explores the development of environmental and sustainability reporting in Sweden and the dynamics behind the corporate decision to introduce, or not to introduce, third-party assurance of voluntary reports. The results are based on interviews with 28 Swedish companies, an analysis of corporate environmental/sustainability/annuaI reports as well as interviews with assurance providers. Be

Test application time and core accessibility are two major issues in System-On-Chip (SOC) testing. The test application time must be minimised, and a test access mechanism (TAM) must be developed to transport test data to and from the cores. In this paper we present an approach to design a test interface (wrapper) at core level taking into account the P1500 restrictions, and to design a TAM archit

We investigate the recently suggested scheme of independent mass matrices for neutrinos and antineutrinos. Such a CPT violating scheme is able to account for all neutrino data with the three known flavors. For atmospheric neutrinos this means that it is possible to have different mass squared differences driving the oscillation for neutrinos and antineutrinos. We analyze the atmospheric and K2K da

"The paper treats the problem of frost resistance as a general problem for all porous materials. The difference between the new way of defining critical degree of saturation (as a materials constant) and the usual way (as functions of a combination of properties of material and environment) is discussed. Possible definitions of moisture conditions are provided. By comparison of the critical degree

Popular Abstract in Swedish Varje år besöker ungefär 100 000 människor från hela världen klostret i den lilla franska byn Taizé. De flesta är ungdomar. Och 4000 av dem är svenskar. Här stannar de en vecka och deltar i brödernas intensiva andaktsliv tre gånger dagligen. Andakterna kännetecknas av meditativ tystnad och korta repetitiva mantra-lika sånger. Vad händer med en människas religiösa attityA considerably small amount of empirical research was found on the process of religious facilitation through liturgical participation and worship (cf., Heimbrock & Boudewijnse, 1990; Wikström, 1994a, 1994b). Using a quasi-experimental design, the present investigation therefore addressed this issue. The process of religious facilitation through intense liturgical participation was regarded as

Macrolides have been used for decades as an important chemotherapeutic agent in the treatment of infectious diseases. In the last 10 years there has also been increasing interest in the interaction between macrolide antibiotics and the immune system. The aim of this review is to focus on the anti-inflammatory action of erythromycin and its derivatives in the treatment of chronic sinusitis and nasa

The research project aims at investigating the potential of new concrete materials technology (high performance concrete, HPC and self-compacting concete, SCC) for competitive design, production and function of structural frames of cast in-situ concrete in house building.