Constructing Hamiltonian quantum theories from path integrals in a diffeomorphism invariant context

Osterwalder and Schrader introduced a procedure to obtain a (Lorentzian) Hamiltonian quantum theory starting from a measure on the space of (Euclidean) histories of a scalar quantum field. In this paper, we extend that construction to more general theories which do not refer to any background, space-time metric (and in which the space of histories does not admit a natural linear structure). Examples include certain gauge theories, topological field theories and relativistic gravitational theories. The treatment is self-contained in the sense that an a priori knowledge of the Osterwalder-Schrader theorem is not assumed.Comment: Plain Latex, 25 p., references added, abstract and title changed (originally :``Osterwalder Schrader Reconstruction and Diffeomorphism Invariance''), introduction extended, one appendix with illustrative model added, accepted by Class. Quantum Gra

THE VERTICAL COORDINATION CONTINUUM AND THE DETERMINANTS OF FIRM-LEVEL COORDINATION STRATEGY

A number of past authors have argued that vertical coordination strategies lie along a continuum running from spot markets to vertical integration. However, the strategies that make up the middle of this continuum have remained ill defined and the sense in which the continuum is truly a continuum has not been made specific. This paper attempts to define the continuum and its "middle" strategies in such a manner that the continuum is truly a continuum has not been made specific. This paper attempts to define the continuum and its "middle" strategies in such a manner that the continuum becomes a useful means by which firm-level decision makers could examine their options for vertical coordination strategy.Industrial Organization,

A Survey of the Growth of Canadian Research in Information Science.

The development of information science in the United States has been discussed in a number of papers. ln comparison to the United States very little is known about the development of information science in Canada. This paper presents a survey of the research contributions Canadians have made to information science and describes how the discipline has grown in Canada. Our data show that the strength of Canadian research has been in the areas of classification and indexing, and information storage and retrieval. Research was generated from different disciplines. The highest producers of research were from library and information science schools, followed by those from computer science departments. Although Canadian journals were founded in the 1970s as forums for research, Canadians still prefer to publish in foreign journals. The cumulative growth of Canadian research publications over the last three decades is evidence that Canadians will continue to contribute to the development of the discipline as a whole

Resampling-based simultaneous confidence intervals for location shift using medians

A method for computing simultaneous pairwise confidence intervals for location shift is presented, based on the permutation distribution of the maximum absolute pairwise difference among all pairs. The method guarantees strong control of familywise confidence, and does not require assumptions about the form of the population distribution. Simulations compare the permutation procedure to a bootstrap procedure, as well as to the Tukey–Kramer procedure. Simulation results suggest the proposed permutation method produces intervals that maintain simultaneous coverage, and that can be more precise for heavy-tailed distributions compared to competing methods. The permutation intervals may be preferred for data from heavy-tailed distributions

Sun, Moon, Stars, Rain, Vol. 7 No. 11

Official publication of the Sigma Tau Delta English Honor Society, Alpha Zet Chapter, Stephen F. Austin State University. Published one a year in the Fall Semester, in cooperation with the English Department of Stephen F. Austin State University.https://scholarworks.sfasu.edu/smsr/1000/thumbnail.jp

USA v. Harold Schrader

USDC for the Middle District of Pennsylvani