The random-field specific heat critical behavior at high magnetic concentration: Fe(0.93)Zn(0.07)F2

The specific heat critical behavior is measured and analyzed for a single crystal of the random-field Ising system Fe(0.93)Zn(0.07)F2 using pulsed heat and optical birefringence techniques. This high magnetic concentration sample does not exhibit the severe scattering hysteresis at low temperature seen in lower concentration samples and its behavior is therefore that of an equilibrium random-field Ising model system. The equivalence of the behavior observed with pulsed heat techniques and optical birefringence is established. The critical peak appears to be a symmetric, logarithmic divergence, in disagreement with random-field model computer simulations. The random-field specific heat scaling function is determined.Comment: 9 pages, 4 figures, RevTeX, minor revision

Generalizing the Method of Images for Complex Boundary Conditions : Application on the LHC Beam Screen

This paper seeks to show that the beam screen of the LHC has an important effect on the electric field of the LHC beam, a few tens of sigmas away from its center. To do so, we develop two new methods for finding the effect of a complex conducting boundary for boundary value problems in electrostatics. Both methods are based on a generalization of the method of images and require low computing power. The result is an exact solution to the problem of a discretized conducting boundary, which we take to be an approximation of the real solution. As an application, we compute the total electric field inside the LHC beam screen and show that neglecting the effect of the conducting boundary is only accurate to 1% for locations closer than 10$\sigma$ from the center of the beam, and only accurate to 10% for locations closer than 30$\sigma$

The Materiality of the Book: Another Turn of the Screw

Summary of themes presented throughout the 1994 Clinic on Library applications of Data Processing, April 10-12, 1994: Literary texts in an electronic age: Scholarly implications and library services.published or submitted for publicatio

The Modern Application of the Best Interests of the Child Theory in Custodial Law

In its traditional sense, family law (aka domestic relations law) involves the legal relationships between husband and wife, parent and child, as a social, political, and economic unit. Recently, the boundaries of family law have to grown to encompass relationships among persons who live together but are not married, so-called non-traditional families. The legal aspects of families, whether they are traditional or non-traditional, include principles of constitutional law, property law, contract law, tort law, civil procedure, statutory regulations, equitable remedies, and marital property and support rights. Most family law statues are drafted as general guidelines. Consequently, state court judges normally have broad discretion in resolving many family law disputes. Moreover, a particular judge’s interpretation of family law issues will be guided by the law of the state whose family law governs the case, and the underlying law is rarely uniform from state to state. A judge may be bound by a state’s traditional family law statutes and judicial precedents, a more modern approach, or a combination of the two

Electroweak corrections to WWZ and ZZZ production at the linear collider

We calculate the electroweak corrections to the production of WWZ and ZZZ at the linear collider in the Standard Model. These processes are important for the extraction of the quartic couplings of the massive gauge bosons which can be a window on the mechanism of spontaneous symmetry breaking. We find that the weak corrections to some kinematic distributions show new features and hence cannot be explained by an overall scale factor.Comment: 5 pages, 2 figs, contribution to the Corfu 2009 proceeding

Experimental Characterization of the Ising Model in Disordered Antiferromagnets

The current status of experiments on the d=2 and d=3 random-exchange and random-field Ising models, as realized in dilute anisotropic antiferromagnets, is discussed. Two areas of current investigation are emphasized. For d=3, the large random field limit is being investigated and equilibrium critical behavior is being characterized at high magnetic concentrations.Comment: 19 pages, 7 figures, Ising Centennial Colloquium, to be published in the Brazilian Journal of Physic

Experiments on the random field Ising model

New advances in experiments on the random-field Ising model, as realized in dilute antiferromagnets, have brought us much closer to a full characterization of the static and dynamic critical behavior of the unusual phase transition in three dimensions (d=3). The most important experiments that have laid the ground work for our present understanding are reviewed. Comparisons of the data with Monte Carlo simulations of the d=3 critical behavior are made. We review the current experimental understanding of the destroyed d=2 transition and the experiments exploring the d=2 metastability at low T. Connections to theories most relevant to the interpretations of all the experiments are discussed.Comment: 25 pages, 5 figures, LaTeX, to be published in World Scientific "Spin Glasses and Random Fields", ed. A. P. Youn