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Modeling Analysis of Different Renewable Fuels in an Anode Supported SOFC

Background. It is expected that fuel cells will play a significant role in a future sustainable energy system, due to their high energy efficiency and possibility to use renewable fuels. Fuels, such as biogas, can be produced locally close to the customers. The improvement for fuel cells during the last years has been fast, but the technology is still in the early phases of development, however th

Sensorless Friction-Compensated Passive Lead-Through Programming for Industrial Robots

Industrial robots are important when the degree of automation in industry is increased. To enable the use of robots also when the products change rapidly, the programming must be quick and easy to perform. One way to accomplish this is to use lead-through programming, i.e., the user manually guides the robot. This paper presents a sensorless approach, and thus avoids the need for a typically expen

Sparse Chroma Estimation for Harmonic Non-Stationary Audio

In this work, we extend on our recently proposed block sparse chroma estimator, such that the method also allows for signals with time-varying envelopes. Using a spline-based amplitude modulation of the chroma dictionary, the refined estimator is able to model longer frames than our earlier approach, as well as to model highly time-localized signals, and signals containing sudden bursts, such as t

Är du genuskompetent? Kampen om genuscertifiering vid svensk universitet

Analysis of gender certification (genuscertifering) policies and actions at Lund, Uppsala and Umeå universities. Lund began a pilot program, Umeå used it as marketing strategy and Uppsala rejected the measures for further gender-based governance. Chapter to appear an anthology on Swedish higher education

On The Distribution of Linear Biases: Three Instructive Examples

Despite the fact that we evidently have very good block ciphers at hand today, some fundamental questions on their security are still unsolved. One such fundamental problem is to precisely assess the security of a given block cipher with respect to linear cryptanalysis. In by far most of the cases we have to make (clearly wrong) assumptions, e.g., assume independent round-keys. Besides being unsat

Fruktan, fascination och frändskap. Det svenska musiklivet och nazismen

Considers the close musical connections between Sweden and Germany, and how they were affected by the cultural policies of Nazi Germany in 1939-45. A wide range of topics are discussed including the reception of Swedish music in Nazi Germany, the relationship between Kurt Atterberg and Moses Pergament and national socialism, and the reaction of Swedish radio audiences to German music.

Machinability and process stability when turning Alloy 718 with standard and produced by selective laser sintering toolholders

The paper presents the results of a comparative analysis of machinability and dynamic stability when turning a nickel-based superalloy with WRA tools in a conventional and prototype toolholders. The use of the prototype toolholder with a spatial structure is shown to significantly suppress vibrations during the machining and stabilize the process within the cutting speed range between 200 and 400

Software code generation for dynamic dataflow programs

In this paper we address the problem of generating efficient software implementations for a large class of dataflow programs that is characterized by highly data-dependent behavior and which is therefore in general not amenable to compile-time scheduling. Previous work on implementing dataflow programs has emphasized classes of stream processing algorithms that exhibit sufficiently regular behavio