18,215 research outputs found
Scottish ferry policy
No full textThe purpose of this paper is to review the evolution of Scottish policy for the provision of ferry services 1999-2009, a period broadly coinciding with the life of the re-established Scottish parliament. We shall argue that, despite clear and consistent warnings by this author and others, the government failed to put in place measures and safeguards that were regarded as standard practice for such an industry providing essential services
q-Differential equations for q-classical polynomials and q-Jacobi-Stirling numbers
No full textWe introduce, characterise and provide a combinatorial interpretation for the so-called q-Jacobi–Stirling numbers.
This study is motivated by their key role in the (reciprocal) expansion of any power of a second order
q-differential operator having the q-classical polynomials as eigenfunctions in terms of other even order operators,
which we explicitly construct in this work. The results here obtained can be viewed as the q-version of
those given by Everitt et al. and by the first author, whilst the combinatorics of this new set of numbers is a
q-version of the Jacobi–Stirling numbers given by Gelineau and the second author
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Network Q
No full textA press release from Network Q announcing that they will begin featuring Brian McNaught, a gay columnist and author, for a monthly segment
Network Q
No full textA press release from Network Q announcing that they will begin featuring Brian McNaught, a gay columnist and author, for a monthly segment
Tobin's Q and Financial Policy
No full textRecent research in macroeconomics has emphasized the importance of linking the financial and real sectors and the need for working with optimizing models. Tobin’s Q model of investment would appear to provide a framework that can satisfy these two criteria. In contrast to the original presentation of the Q model, the formal development has not recognized that the firm actively participates in a number of financial markets; in this broader context, we show that Q is likely to be an uninformative and possibly misleading signal for investment expenditures . We then endeavor to turn this negative theoretical result to positive advantage in resolving a number of empirical problems with Q models, but the modifications dictated by the theory receive little support from the data.
Rideau Ferry
No full textOblique aerial view of Rideau Ferry with concentration on beach and boat launch areas.Image is situated at 44.854° North (Latitude), 76.139° West (Longitude)
Supporting Data for Spectral Engineering with Quantum Dot Films for Enhanced Lettuce Growth
No full textTwelve .csv files were used to conduct the simulations and generate the figures reported in the journal article and its corresponding supporting information file.To improve crop yields without the added cost of supplementary lighting, passive spectral manipulation shifts sunlight into critical wavebands for plant growth. Quantum dot (QD) films shift higher energy photons to lower energies, serving as tunable sunlight filters, but are understudied in this application space. Herein, we identify QD film properties to pro-mote lettuce growth. By simulating films with nine different nontoxic QDs, we calculate a concentration-dependent lettuce yield improvement of up to 45%. QDs that strongly absorb blue/green light and downshift this light to red/far-red wavebands result in the highest lettuce yield enhancements. Despite this strong absorption, we find that QD films can be utilized broadly in the United States. Contrary to common intuition, increasing the photoluminescence quantum yield or film outcoupling efficiency does not further increase lettuce yield, indicating that filtered absorption is the most important factor in design. This study points to the need for more directed investigation into QD films for increasing plant growth.K.Q.L. was partially supported by the National Science Foundation Graduate Research Fellowship under grant no. 2237827 and received support from the University of Minnesota under the Ronald L. and Janet A. Christenson Chair in Renewable Energy.Loh, Kristine Q; Eylands, Nathan J; Ferry, Vivian E; Kortshagen, Uwe R. (2025). Supporting Data for Spectral Engineering with Quantum Dot Films for Enhanced Lettuce Growth. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/kafz-yc82
The threat of "currency wars": A European perspective
No full textThe ‘currency war’, as it has become known, has three aspects: 1) the inflexible pegs of
undervalued currencies; 2) recent attempts by floating exchange-rate countries to resist
currency appreciation; 3) quantitative easing. Europe should primarily be concerned
about the first issue, which relates to the renewed debate about the international
monetary system. The attempts of floating exchange-rate countries to resist currency
appreciation are generally justified while China retains a peg. Quantitative easing cannot
be deemed a ‘beggar-thy-neighbour’ policy as long as the Fed’s policy is geared towards price stability. Current US inflationary expectations are at historically low levels. Central banks should come to an agreement about the definition of price stability at a time of deflationary pressures. The euro’s exchange rate has not been greatly impacted by the recent currency war; the euro continues to be overvalued, but less than before
A Q-learning based multi-strategy integrated artificial bee colony algorithm with application in unmanned vehicle path planning
No full textArtificial bee colony (ABC) is a prominent algorithm that offers great exploration capabilities among various meta-heuristic algorithms. However, its monotonous and one-dimensional search strategy limits its searching performance in the solving process. Thus, to address this issue, a Q-learning based multi-strategy integrated ABC algorithm (QMABC) is proposed. In the QMABC, multiple search strategies are proposed to utilize different individual experiences and search approaches for solution updates. Then, Q-learning is employed for strategy selection. In comparison to previous studies, this paper introduces more effective state and action configurations within the framework of Q-learning. To evaluate the performance of the QMABC, CEC 2017 benchmark functions are adopted to compare it to different meta-heuristic algorithms including ABC based and non-ABC based algorithms. Moreover, applications in path planning are implemented to further verify the effectiveness of the QMABC. Overall, it should be highlighted that the proposed QMABC demonstrates superiority in both numerical and practical experiments.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Discrete Mathematics and Optimizatio
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