Delta-Interference of Two Friedel Resonances

When a single resonator is coupled to a continuous spectrum one obtains a resonance of finite half-width. Such a resonance is known in many fields of physics. The Friedel resonance is an example where a d-impurity is dissolved in a simple metal. If two resonators are coupled to the continuous spectrum the resonances interfere. For identical coupling and frequencies one obtains two effective resonances. The effective coupling of one of them to the continuum can be tuned to zero yielding a delta-like resonance

The Past-Future Asymmetry

As the past-future asymmetry – that fact that we have records of the past but not the future – is still a puzzle the aim of this paper is twofold: a) to explain the asymmetry and its status in philosophy and physics and to critically review the proposed solutions to this puzzle; b) to advance a dynamic solution to the puzzle (which is lacking in alternative proposals) in terms of the ‘universality’ of the entropy relation in statistical mechanics

The molecular complexity of G34.3+0.2

Recent observations of the Orion-KL region$^{1,2,3}$ have shown that the chemical distribution in the region is much more complex than originally thought. There are not just one nitrogen rich core and one diffuse oxygen rich region. But rather, at higher resolution, each of these regions breaks up into smaller more compact components associated with individual heating/energy sources. Additionally, one molecular species, acetone [\chem{(CH_3)_2CO}], has a distinctly different distribution from any other large molecular species. These results cannot be explained by current chemical models. In order to expand our understanding of the chemistry in complex regions like Orion-KL, we have observed four additional high mass star forming regions: W3, G34.3+0.2, W75N, and W51 e1/e2 at several spatial resolutions (1"" - 5""). The results of these multi-resolution observations (with an emphasis on G34.3), a comparison to the results from Orion-KL, and their implications for astrochemical models, will be presented.\\\\ \noindent{\footnotesize $^1$ Friedel, D. N. \& Snyder, L. E. “High-Resolution $\lambda$=1 mm CARMA Observations of Large Molecules in Orion-KL.” Astrophysical Journal, 2008, 673, 962\\ $^2$ Widicus Weaver, S. L. \& Friedel, D. N. “Complex Organic Molecules at High Spatial Resolution toward ORION-KL. I. Spatial Scales.” Astrophysical Journal Supplements, 2012, 201, 16\\ $^3$ Friedel, D. N. \& Widicus Weaver, S. L. “Complex Organic Molecules at High Spatial Resolution toward ORION-KL. II. Kinematics.” Astrophysical Journal Supplements, 2012, 201, 17}Ope

Rekonstrukce výzkumné zplyňovací technologie na Výzkumném energetickém centru

Gasification technology was one of the first large projects of the Energy Research Center at the VSB - Technical University of Ostrava. The beginnings of the technology date back to 2006, when construction of the first version of the gasification plant with an autothermal generator was started. During these years of operation, a lot of testing was conducted on the technology to test different types of fuel (pellets from rice husks, pellets from miscanthus, straw pellets, RDF and many other types of fuels) and various modifications to the technology (testing of two cyclones, dolomite reactor testing, scrubber testing). Subsequently reconstructed gasification technology held tests by RDF fuel, wood pellet and mixtures of these fuels. The tests of the fuel was conducted at three temperatures (750, 850, 950 ° C).Zplyňovací technologie byla jedním z prvních velkých projektů Výzkumného energetického centra na Vysoké škole báňské - Technické univerzitě Ostrava. Počátky technologie se datují k roku 2006, kdy byla zahájena výstavba první verze zplyňovacího zařízení s autotermním generátorem. Během těchto let provozu bylo na technologii prováděno mnoho testů, kdy se zkoušely různé druhy paliv (pelety z rýžových slupek, pelety z miscantusu, pelety ze slámy, RDF a mnoho dalších druhů paliv) a byly prováděny různé úpravy na technologii (zkoušení dvou cyklonů, zkoušení dolomitového reaktoru, zkoušení vymývačky). Následně proběhly na rekonstruované technologii zplyňování testy paliva RDF, dřevěných pelet a směsi těchto paliv. Testy paliv probíhaly ve třech teplotách (750, 850, 950 °C)

A Price is a signal: on intrinsic motivation and crowding-out

If a previously unpaid activity (donating blood) is paid then we often observe that this activity is reduced. In this paper, it is hypothesised that the price offered is taken as a proxy for the "market value" of the activity. Depending on how the actor valued the activity previously, crowding-out or crowding-in, as well as persistence (or not) of the effect after the abandoning of payment is implied. This "naive" explanation is confronted with Bénabou and Tirole´s (2003) priciple-agent model where the opposite signalling effect is hypothesised: a higher price is taken as an indication for a lower value. --Intrinsic Motivation,Crowding-out,Signaling

Over- and under-investment according to different benchmarks

In a two-stage oligopoly, with investment in the first stage and quantity or price competition in the second stage, there is a kind of Folk Theorem: We find (i) over-investment if the goods are substitutes and competition is in strategic substitutes, (ii) under-investment if we have either complements instead of substitutes or strategic complements instead of strategic substitutes, and (iii) again over-investment if both attributes change. The existing literature, however, lacks a proof of this theorem and, in particular, it lacks a systematic comparison of the different benchmarks for over-and under-investment. A "naive" benchmark is the efficient investment with respect to the subgame perfect (closed loop) equilibrium quantities. Alternative benchmarks (which are more often proposed) are the open loop equilibrium investment or the welfare maximizing investment. The chosen benchmark is critical because the Folk Theorem applies (under certain conventional conditions) only for the naïve benchmark. The other two benchmarks require additional assumptions or the distinction of subcases. --Oligopoly,technology choice,efficiency,under-investment,overinvestment