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Combinatorial knowledge bases: integrating cognitive, organizational and spatial dimensions in innovation studies and economic geography.

This paper has three aims. Firstly, to provide a critical review of previous conceptualizations of the knowledge base approach in the research fields of innovation studies and economic geography. Secondly, to propose a broadened interpretation of the knowledge base approach which allows for considering combinatorial knowledge bases within and across industries, regions and time periods and for ana

A New Version of Grain-128 with Authentication

A new version of the stream cipher Grain-128 is proposed. The new version, Grain-128a, is strengthened against all known attacks and observations on the original Grain-128, and has built-in support for authentication. The changes are modest, keeping the basic structure of Grain-128. This gives a high confidence in Grain-128a and allows for easy updating of existing implementations.

Integral Action - A Disturbance Observer Approach

Integral action is required in many controllers inorder to solve real world problems. Modeling errors anddisturbances are examples of issues that can be dealtwith by using controllers with integral action. This paper exploresthe use of disturbance observers to introduce integral action intoan output feedback controller. In particular, theproposed solution is generalized to include the case of plan

Designing simultaneous saccharification and co-fermentation of lignocellulose for improved xylose conversion

Popular Abstract in Swedish Global uppvärmning, säkerhetspolitik och framtida minskad tillgång på fossila bränslen har de senaste åren skyndat på sökandet efter nya, förnyelse-bara drivmedel. Användningen av bioetanol har ökat avsevärt och är idag ett av de vanligaste biobränslena i världen. Idag framställs bioetanol vanligen genom jäsning av socker från socker-rör eller från stärkelse (från tillFuel ethanol from lignocellulose is one sustainable alternative to the fossil fuels of today. All sugars in the material must be utilized in order to achieve high overall ethanol yields. Baker’s yeast, Saccharomyces cerevisiae, has been engineered to ferment the pentose sugar xylose from lignocellulose to ethanol. However, ethanol production from xylose is slow and often incomplete. In this work s