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ORBi

Some Reflections on a Computer-aided Theory Exploration Study in Category Theory (Extended Abstract) Benzmüller, Christoph ; in 3rd Conference on Artificial Intelligence and Theorem Proving (AITP 2018), Book of Abstracts (2018) Detailed reference viewed: 36 (0 UL)Some reflections on the flow of knowledge in digital history Hofmann, Frank Diverse speeches and writings (2020) Detailed reference viewed: 47 (1 UL)Some Reflections on the Resilience of Luxembourg's Food System Reckinger, Rachel Article for general public (2020) Moments of crisis like the current one sparked by Covid-19, engage social, economic, cultural and political institutions of a society and stress-test their resourcefulness, while individual and collective ... [more ▼] Moments of crisis like the current one sparked by Covid-19, engage social, economic, cultural and political institutions of a society and stress-test their resourcefulness, while individual and collective food supplies become primary concerns. Where does even the wealthiest of EU member States stand when it comes to food sovereignty and specific vulnerabilities, what needs to change and which food policies are needed to facilitate a sustainable food system – both locally and internationally? Combining qualitative, empirical research methods to textual and statistical analysis, as well as transformative research, I focus on key areas of Luxembourg’s food system presenting challenges – specific ones and structural ones intertwined with issues in other countries – and discuss current and planned pathways of optimisation. I will start out with an analysis of agricultural and commercial specificities of a food system with low self-sufficiency rates, linked to meat and dairy specialisations, but also to market accessibility and market structure issues, leading to heavy imports. I will then shed light on pathways currently put into practice by the State, by economic actors, by educational actors and by social movements and coalitions of the willing, advocating ecological, ethical and qualitative production methods. Finally, I will show how the first Food Policy Council at national level that Luxembourg is currently founding is favoring a deliberate shift towards a multi-stakeholder-lead effective food policy. [less ▲] Detailed reference viewed: 89 (4 UL)Some Remarks on the Efficiency of Exequatur Cuniberti, Gilles in Festschrift für Bernd von Hoffmann (2012) Detailed reference viewed: 88 (3 UL)Some remarks on the heat flow for functions and forms Thalmaier, Anton in Electronic Communications in Probability (1998), 3 Detailed reference viewed: 277 (17 UL)Some remarks on the influence of temperature-variations, non-linearities, repeatability and ageing on modal-analysis for structural health monitoring of real bridges Maas, Stefan ; Schommer, Sebastian ; Nguyen, Viet Ha et al in MATEC Web of Conferences (2015, October 19), 24(Article No. 05006), Structural Health Monitoring (SHM) intends to identify damage by changes of characteristics as for instance the modal parameters. The eigenfrequencies, mode-shapes and damping-values are either directly ... [more ▼] Structural Health Monitoring (SHM) intends to identify damage by changes of characteristics as for instance the modal parameters. The eigenfrequencies, mode-shapes and damping-values are either directly used as damage indicators or the changes of derived parameters are analysed, such as e.g. flexibilities or updated finite element models. One common way is a ontinuous monitoring under environmental excitation forces, such as wind or traffic, i.e. the so-called output-only modal analysis. Alternatively, a forced measured external excitation in distinct time-intervals may be used for input-output modal analysis. Both methods are limited by the precision or the repeatability under real-life conditions at site. The paper will summarize everal field tests of artificially step by step damaged bridges prior to their final demolishment and it will show the changes of eigenfrequencies due to induced artificial damage. Additionally, some results of a monitoring campaign of a healthy bridge in Luxembourg are presented. Reinforced concrete shows non-linear behaviour in the sense that modal parameters depend on the excitation force amplitude, i.e. higher forces lead often to lower eigenfrequencies than smaller forces. Furthermore, the temperature of real bridges is neither constant in space nor in time, while for instance the stiffness of asphalt is strongly dependant on it. Finally, ageing as uch can also change a bridge’s stiffness and its modal parameters, e.g. because creep and hrinkage of concrete or ageing of elastomeric bearing pads influence their modulus of elasticity. These effects cannot be considered as damage, though they influence the measurement of modal parameters and hinder damage detection. [less ▲] Detailed reference viewed: 263 (61 UL)Some remarks on the pending constitutional change in the Grand Duchy of Luxemburg Gerkrath, Jörg in European Public Law (2013), 19(3), 449-459 In the history of constitutional changes in Europe, the making of a new constitution is often linked to violent incidents like a revolution, a coup d'état or a war. That is why the change of the ... [more ▼] In the history of constitutional changes in Europe, the making of a new constitution is often linked to violent incidents like a revolution, a coup d'état or a war. That is why the change of the constitution was mostly preceded by a change of the holder of the constituent power. The Grand Duchy of Luxembourg, however, is currently engaged in a process of constitution making in compliance with the revision procedure established by the existent document. The Constitution of the Grand Duchy, one of the oldest constitutional documents in Europe still in force, is undergoing a far-reaching revision aiming at a general overhaul.1 According to the parliamentary committee in charge, this revision shall finally give birth to a 'new' constitution, meaning that a modified and updated edition of the constitution shall be published in the national official journal (Mémorial). The revised text will then be considered as the Constitution of 2013 or, more likely, of 2014. The Constitution of 1868 is to be repealed. After the previous charters from 1841, 1848 and 1856 and the present text from 1868, it would thus become the fifth constitution of the Grand Duchy. As constitutional history also shows, this would not be the first time that Luxembourg adopts a new constitution following the formal amendment procedure foreseen by the previous document.2 Local politicians and lawyers seem to consider that the academic distinction between 'constitution making' by the will of an original pouvoir constituant and 'constitutional revision' through a parliamentary procedure prescribed by the constitution itself represents rather a gradual difference than a fundamental one. A number of good reasons convinced the Committee on Institutions and Constitutional Affairs of the Chamber of Deputies to introduce on 21 April 2009 a revision proposal aiming to modify and re-arrange the out-dated Constitution of 1868. While several initiatives for a general revision of the Constitution have been undertaken since the 1970s, none has been successful. Only fractional revisions were adopted in a century and a half. Between 1919 and 2009, no less than thirty-four amendments are listed, the last dating from 12 March 2009. Having occurred at different times and on various aspects, they have certainly undermined the coherence of the initial text. Nonetheless, the Constitution still includes a majority of provisions dating back to its origins. The main reasons put forward by the drafters of the revision proposal are: first, to modernize a terminology somewhat out-dated; second, to adapt the legal text to the political reality by re-writing the constitution and make it coincide with the 'living constitution' as reflected in the functioning of institutions, and third, to incorporate into the written constitution provisions relating to succession to the throne currently contained in a legal document of uncertain value, namely the Family Compact of the House of Nassau (Nassauischer Erbfolgeverein) of 1783. Almost four years after its launch, this amendment procedure, still far from being accomplished, is now, in February 2013, in a sufficiently advanced stage to allow some general commentaries. Given the limited format of this country report, the following remarks will focus on a brief presentation of the applicable revision procedure and a provisional scrutiny of some of the most substantial amendments under discussion. [less ▲] Detailed reference viewed: 482 (152 UL)Some remarks to the formal and local theory of the generalized Dhombres functional equation ; Tomaschek, Jörg in Results in Mathematics (2013), 63(1-2), 377-395 We are looking for local analytic respectively formal solutions of the generalized Dhombres functional equation $f(zf(z))=\varphi(f(z))$ in the complex domain. First we give two proofs of the existence ... [more ▼] We are looking for local analytic respectively formal solutions of the generalized Dhombres functional equation $f(zf(z))=\varphi(f(z))$ in the complex domain. First we give two proofs of the existence theorem about solutions $f$ with $f(0) = w_0$ and $w_0 \in \mathbb{C}^\star \setminus \mathbb{E}$ where $\mathbb{E}$ denotes the group of complex roots of $1$. Afterwards we represent solutions $f$ by means of infinite products where we use on the one hand the canonical convergence of complex analysis, on the other hand we show how solutions converge with respect to the weak topology. In this section we also study solutions where the initial value $z_0$ is different from zero. [less ▲] Detailed reference viewed: 97 (3 UL)Some Results of Heterogeneous Data Inversions for Oceanic Tides ; Francis, Olivier ; et al in Journal of Geophysical Research (1991), 96(B12), 20267-20288 Detailed reference viewed: 114 (9 UL)Some results of the Mariño-Vafa formula Li, Yi in Mathematical Research Letters (2006), 13(5-6), 847-864 Detailed reference viewed: 139 (7 UL)Some Simple Macroeconomics of Artificial Intelligence (AI) - A User’s Guide - Irmen, Andreas Presentation (2018) Detailed reference viewed: 132 (4 UL)Some simple variance bounds from Stein’s method Ley, Christophe ; ; et al in ALEA: Latin American Journal of Probability and Mathematical Statistics (2021), 18 Using coupling techniques based on Stein’s method for probability approximation, we revisit classical variance bounding inequalities of Chernoff, Cacoullos, Chen and Klaassen. Our bounds are immediate in ... [more ▼] Using coupling techniques based on Stein’s method for probability approximation, we revisit classical variance bounding inequalities of Chernoff, Cacoullos, Chen and Klaassen. Our bounds are immediate in any context wherein a Stein identity is available. After providing illustrative examples for a Gaussian and a Gumbel target distribution, our main contributions are new variance bounds in settings where the underlying density function is unknown or intractable. Applications include bounds for analysis of the posterior in Bayesian statistics, bounds for asymptotically Gaussian random variables using zero-biased couplings, and bounds for random variables which are New Better (Worse) than Used in Expectation. [less ▲] Detailed reference viewed: 14 (0 UL)Some Things are Easier for the Dumb and the Bright Ones (Beware the Average!) Jamroga, Wojciech ; in Proceedings of the Twenty-Eighth International Joint Conference on Artificial Intelligence IJCAI (2019) Detailed reference viewed: 48 (0 UL)Some thoughts on the assessment of Collaborative Problem Solving. Greiff, Samuel ; ; Scientific Conference (2011, December 12) Detailed reference viewed: 122 (1 UL)Some thoughts on the nature and limits of the right to appeal in front of the ICC Mosna, Anna in Kritische Vierteljahresschrift für Gesetzgebung und Rechtswissenschaft (2017), 100(3), 265289 Detailed reference viewed: 122 (4 UL)Some thoughts on the process of scientific publishing Greiff, Samuel Presentation (2017, February) Detailed reference viewed: 37 (0 UL)Some unexpected facts about Lie Algebras Leytem, Alain Speeches/Talks (2013) Lie algebras and their morphisms do not behave as nicely as one might expect. We will discuss some of the most important illustrations. For example, the category of Lie algebras admits direct products ... [more ▼] Lie algebras and their morphisms do not behave as nicely as one might expect. We will discuss some of the most important illustrations. For example, the category of Lie algebras admits direct products, but no coproducts, and the object called "direct sum" is actually not a direct sum in the categorical sense. It admits kernels and cokernels, but it is neither abelian, nor additive, and the image of a morphism is not a categorical image. Nevertheless, one can still define short exact sequences of Lie algebras. We finish by discussing the Splitting Lemma, which for Lie algebras, in general, only holds in a weaker form than in the abelian case. [less ▲] Detailed reference viewed: 207 (11 UL)Some uniform bounds for elliptic curves over Q ; Tronto, Sebastiano E-print/Working paper (2021) We give explicit uniform bounds for several quantities relevant to the study of Galois representations attached to elliptic curves E/Q. We consider in particular the subgroup of scalars in the image of ... [more ▼] We give explicit uniform bounds for several quantities relevant to the study of Galois representations attached to elliptic curves E/Q. We consider in particular the subgroup of scalars in the image of Galois, the first Galois cohomology group with values in the torsion of E, and the Kummer extensions generated by points of infinite order in E(Q). [less ▲] Detailed reference viewed: 67 (1 UL)Something Fantastic ; ; et al Book published by Ruby Press (2010) Something Fantastic is the multifaceted manifesto of three young architects – Julian Schubert, Elena Schütz and Leonard Streich. It is also the name of their new Berlin-based studio; both book and studio ... [more ▼] Something Fantastic is the multifaceted manifesto of three young architects – Julian Schubert, Elena Schütz and Leonard Streich. It is also the name of their new Berlin-based studio; both book and studio derive from a diploma thesis at the University of the Arts, Berlin. Something Fantastic calls for increased consciousness in architectural thought and action, particularly in relation to the environment, energy and contemporary politics. Excerpts from thinkers and theorists – from Thomas Hobbes to Ludwig Mies van der Rohe – and interviews, including with Markus Miessen and Werner Sobek, inform a publication determined to call for change, and offer hope for the future. [less ▲] Detailed reference viewed: 46 (0 UL)Something out of Nothing? Neoclassical Growth and the ‘Trivial’ Steady State ; Irmen, Andreas Report (2006) A common perception about the neoclassical growth model is that an economy devoid of capital cannot evolve to strictly positive levels of output if capital is essential. We challenge this view by positing ... [more ▼] A common perception about the neoclassical growth model is that an economy devoid of capital cannot evolve to strictly positive levels of output if capital is essential. We challenge this view by positing a broad class of production functions, encompassing the neoclassical production function, that—surprisingly—show that a take-off is possible even though the initial capital stock is zero and capital is essential. Since the marginal product of capital is initially infinite, the “trivial” steady state becomes so unstable that the solution to the equation of motion involves the possibility of a take-off. When it happens, the take-off is spontaneous: there is no causality, not even randomness. [less ▲] Detailed reference viewed: 69 (1 UL) |
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