Sökresultat

Popular Abstract in Swedish Människan har märkbart ändrat Jordens ekosystem och dess funktioner. Genom avskogning och konvertering av naturliga ekosystem till åkrar och betesmarker så har människor skapat helt nya typer av ekosystem. Cirka en tredjedel av den koldioxid (CO2) som människor har släppt ut i atmosfären, kommer från dessa aktiviteter, resten beror till största delen på utsläpp från förThrough deforestation and conversion of natural ecosystems to croplands and pastures, have humans released vast amounts of carbon (C) dioxide (CO2) into the atmosphere. Roughly one third of the cumulative anthropogenic emissions until today stem from these practices, the remainder being mostly due to fossil fuel combustion. The extra CO2 has caused an increase in global air temperature, and both t

In this paper, the results from a joint industry-academia project in industrial robotic force control are presented. The extension and implementation of an external sensor system for an industrial robot system, which can be used for high-bandwidth force control, are described. Results from two industrial applications using the system are presented, a stub grinding application using a new compliant

Mit einer Thermopuppe wurde die Erwärmung durch langwellige Wärmestrahlung beim Tragen von Schutzkleidung erfasst, wobei Material und Anzahl der Schichten der Unterbekleidung variiert wurden. Die Unterbekleidung minderte die durch Strahlungs-Absorption hervorgerufene Erwärmung. Die dabei beobachtete hohe negative Korrelation mit der thermischen Isolation zeigt Möglichkeiten zur Berücksichtigung vo

A sequential Bayesian estimation algorithm for joint positioning and multipath mitigation in global navigation satellite systems is presented, with an underlying process model that is especially designed for dynamic user scenarios and dynamic channel conditions. In order to facilitate efficient integration into receivers it builds upon complexity reduction concepts that previously have been applie

We present fully self-consistent results for the self-energy of the electron gas within the GW approximation. This means that the self-consistent Green’s function G, as obtained from Dyson’s equation, is used not only for obtaining the self-energy but also for constructing the screened interaction W within the random-phase approximation. Such a theory is particle and energy conserving in the sense

The paper describes a novel method for self tuning cylinder pressure based heat release computation that is suitable for online usage in e.g. combustion phasing control applications. The method estimates the polytropic exponents and cylinder pressure offsets immediately preceding and succeeding the combustion event respectively using a fast nonlinear least squares method. The polytropic exponent a

“The death of distance” has become the battle cry of a modern generation of managers, policy makers and scientists who embrace the new globalized economy and its promise of frictionless exchange across the world. While highly influential, this view does not, however, stand unchallenged. Over the last 15 years, there has been a growing interest in the geographical clustering of industry. Well-known

Our purpose in this chapter is to give a brief perspective on islands in global historical-political ecology, focusing on ecologically unequal exchange and the formation of landesque capital. We emphasize how these processes are intertwined and recursively connected in broader contexts of uneven development. Empirical examples draw on our research into the historical-political ecology of islands a

In this paper, it is shown that tapered resistive sheets at the edges of the array can be used to transform the scattering properties of the antenna or the radome to that of a metallic plate and hence reduce the radar cross section. Numerical examples of a bandpass FSS radome are presented to illustrate the results. The RCS reduction is very good for TE polarization but not as efficient for the TM

This licentiate thesis examines the development of internationalization of production in Kazakhstan and its economic implications over the period 1991-2010. The main objectives of the thesis are to investigate the role of foreign investment and TNCs in the economic growth of Kazakhstan since its independence in 1991 and onward, to explore the motives that foreign enterprises have for investing in

This chapter describes a personal aerosol sampler with size fractionation and time resolution that gives samples for elemental analysis. An impaction stage collects coarse particles and a filtration stage collects finer ones. Sampling in consecutive time intervals is performed on different impaction and filtration surfaces. These sampling surfaces corresponding, for example, to 15-min intervals, m

In this paper we propose a novel trellis based soft-input soft-output MIMO detector with significantly reduced search space. The performance of the detector is measured by evaluating the ultimate communication rate that is achievable for a system employing the novel detector; this limit corresponds to a mutual information that can be determined by standard methods. We also derive an expression tha

Abstract not available