12,244 research outputs found
Commentary: Intentional Observer Effects on Quantum Randomness: A Bayesian Analysis Reveals Evidence Against Micro-Psychokinesis
The paper titled `Intentional Observer Effects on Quantum Randomness: A
Bayesian Analysis Reveals Evidence Against Micro-Psychokinesis', published in
Frontiers of Psychology in March 2018, reports on a mind-matter experiment with
the main result of strong evidence against Micro-Psychokinesis. Despite this
conclusion, the authors interpret the observed pattern in their data as
possible evidence for Micro-Psychokinesis, albeit of a different kind.
Suggesting a connection to some existing models, the authors put forward the
hypothesis that a higher frequency of slow data variations can be observed in
their experiment data than in a set of control data. This commentary analyses
this claim and concludes that the variation in the data motivating this
hypothesis would show up just by chance with a probability of p=0.328 under a
null hypothesis. Therefore, there is no evidence for the hypothesis of faster
data variations, and thus for this kind of suggested Micro-Psychokinesis in
this experiment
On the possibility of Vacuum-QED measurements with gravitational wave detectors
Quantum electro dynamics (QED) comprises virtual particle production and thus
gives rise to a refractive index of the vacuum larger than unity in the
presence of a magnetic field. This predicted effect has not been measured to
date, even after considerable effort of a number of experiments. It has been
proposed by other authors to possibly use gravitational wave detectors for such
vacuum QED measurements, and we give this proposal some new consideration in
this paper. In particular we look at possible source field magnet designs and
further constraints on the implementation at a gravitational wave detector. We
conclude that such an experiment seems to be feasible with permanent magnets,
yet still challenging in its implementation.Comment: 11 pages, 10 figure
Foreign banksâ attraction to the financial centre Frankfurt : a "u"-shaped relationship
This paper traces the location of foreign banks in Germany from 1949 to 2006. As suggested by new economic geography models we find a âuâ-shaped concentration of foreign banks in Germany. Only after a competition between several cities, Frankfurt has emerged as the pre-eminent financial centre, triggered by the âhistorical eventâ of setting up the German central bank in Frankfurt. After a strong increase, Frankfurtâs share in the location of foreign banks in Germany decreases slowly but significantly since the mid 1980âs. We conclude that there will be a lesser role in Europe for secondtier financial centres in the future
Fixing a Flat at 65 MPH: Restructuring Services to Improve Program Performance in Workforce Development
Business leaders have easy access to primers on organizational change; indeed many are bestsellers. In contrast, little is available to nonprofit executives intent on restructuring their organizations. And, while many lessons from the business world are relevant, there are unique aspects of nonprofits' missions and organizational cultures that demand special attention. This report examines the restructuring of three leading workforce development organizations that were seeking to improve performance. Based on their many achievements and the occasional misstep, Fixing a Flat at 65 MPH offers nonprofit managers seven guiding principles addressing the most significant challenges likely to arise during a major reorganization
Frankfurt - an emerging international financial centre
Characterised as the mighty capital of the eurozone (Sassen 1999, 83), Frankfurt is said to be a rising world city primarily due to its financial centre. This is reflected in the use of such common catchphrases as Bankfurt and Mainhattan for the city, as well as its reference in scientific publications. As Ronneberger and Keil (1995, 305) state, for instance, a service economy [...] mastered by the finance sector forms the basis for the continuing integration of Frankfurt into the international market. Frankfurt is the most important German as well as European financial centres. Thirteen of the 30 largest German banks and about two thirds of Germany s foreign banks are seated here. Frankfurt s stock exchange (ranked 4th in the world) is by far the biggest in Germany with a turnover-share of more than 80%. Its derivatives exchange (Eurex) aims to become the biggest in the world. As the host city for the European Central Bank, it is also the centre of European monetary policy. As a major node in the global financial network today, Frankfurt s specific functions within this network will be investigated in this paper. Unlike most other predominant national financial centres, Frankfurt has not continuously held this position in Germany s since the middle ages: It re-gained it s position from Berlin only after World War II. In contrast to the static phenomenon financial centre which is well covered in the literature emergence and development of financial centres is not as well understood. The study of the development of the financial centre Frankfurt after World War II gives insights into the dynamics of the self-reinforcing mechanisms within financial centres; the second topic covered in the paper. The paper is organised as follows: the remainder of this chapter looks at the method used in this study and the theory of financial centres with an emphasis on the basic approaches to the emergence of financial centres. After that it is asked whether Frankfurt meets the basic requirements for the concept of path dependence, i.e. that there are self-reinforcing mechanisms. After a positive answer to that, the development of Frankfurt as a financial centre is discussed as well as its role as a node in the world (financial) system today in chapter two. Chapter three provides some more or less speculative remarks about Frankfurt s future; the last chapter briefly summarises the findings of the paper
Environmental Labeling, Protected Geographical Indications and the Interests of Developing Countries
Among developing countries, one can identify both proponents and opponents of extending the use of geographical indications (GIs) beyond wines and spirits. Such an extension is currently being discussed under the Agreement on Trade-Related Aspects of Intellectual Property Rights (TRIPS) of the World Trade Organization. While labeling is mostly based on private initiatives, GIs are considered to be long-term public rights. Proponents therefore regard GIs as the stronger tools for protecting their national property rights and offering them new opportunities to develop their export markets. Opponents, however, consider GIs to be new barriers to trade that impede their export opportunities. This article clarifies these positions and pulls together some evidence on costs and benefits related to GIs versus labels.developing countries, geographical indications, labeling, WTO, Food Consumption/Nutrition/Food Safety, International Relations/Trade,
Explicit local time-stepping methods for time-dependent wave propagation
Semi-discrete Galerkin formulations of transient wave equations, either with
conforming or discontinuous Galerkin finite element discretizations, typically
lead to large systems of ordinary differential equations. When explicit time
integration is used, the time-step is constrained by the smallest elements in
the mesh for numerical stability, possibly a high price to pay. To overcome
that overly restrictive stability constraint on the time-step, yet without
resorting to implicit methods, explicit local time-stepping schemes (LTS) are
presented here for transient wave equations either with or without damping. In
the undamped case, leap-frog based LTS methods lead to high-order explicit LTS
schemes, which conserve the energy. In the damped case, when energy is no
longer conserved, Adams-Bashforth based LTS methods also lead to explicit LTS
schemes of arbitrarily high accuracy. When combined with a finite element
discretization in space with an essentially diagonal mass matrix, the resulting
time-marching schemes are fully explicit and thus inherently parallel.
Numerical experiments with continuous and discontinuous Galerkin finite element
discretizations validate the theory and illustrate the usefulness of these
local time-stepping methods.Comment: overview paper, typos added, references updated. arXiv admin note:
substantial text overlap with arXiv:1109.448
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