Motivated by the improving sensitivity, R, of experiments on μ T i → e T i and the enhanced Higgs nucleon interaction, we study this lepton number violating process induced by Higgs exchange. Taking the possible sensitivity, R ≃ 10, we obtain the constraint on the Higgs-muon-electron vertex, κμe, to be less than 2.4×10−7 if the masses of the Higgs scalar and W gauge boson are the same. κμe is a...

During the past decade there have been remarkable achievements in the immunopathogenesis of the inflammatory myopathies that laid the grounds for more eVective therapeutic interventions. This editorial summarises where we stand today in our understanding of these disorders and their treatment, identifies key biological issues that need further study, and considers possibilities of applying new ...

This is really the overarching question associated with model calibration: are the models good enough? But the question has to be asked in the framework of what the models will be asked to do, which is to evaluate remedial alternatives. (Problem identification is usually the first step in model evaluation; see, e.g., Ditmars et al., 1987.) The following sketch and discussion provide a framework...

Attachment theory is presented in this article as involving embodied relational processes within complex relational systems. Two narrative-like ‘events’ are re-presented to illustrate very young children playfully relating – connecting and communicating interand intrasubjectively. The ethnographic-inspired research methods included the researcher as a participant observer, an outsider, an other...

A numerical technique is presented which yields an exact solution to the one-dimensional scattering problem. The algorithm is used to compute phase shift error curves associated with the WKB approximation. A variety of scattering potentials are considered and cover cases for which the WKB solution varies from extremely good to poor. It is shown that some commonly assumed forms for ionospheric e...

provided x is sufficiently large. An asymptotic formula of type (1) Df (x; q, a) = (1 +O((log x)))Df (x; q) , in which the error term is smaller than the main term by a suitable power of log x, is good enough for basic applications. More important than the size of the error term is the range where (1) holds uniformly with respect to the modulus q. In this paper we consider the problem for the d...

In this paper, we present some guidelines for implementing various financial instruments for the purposes of credit and payment, including protocols for commercial transactions, dispute resolution, and establishing credit reputation. We strive to employ only widely used, standardized cryptography and keep the proposed procedures as simple as possible on the conceptual level. Also, we want all t...

Ende März 2001, just während der Tage, in denen sich die IT-Welt zur CeBIT in Hannover traf, machte die Nachricht über eine Attacke auf das verbreitete Verschlüsselungsprogramm PGP Schlagzeilen. Die Computerzeitschrift c’t stellte sogar vorübergehend die alljährlich angebotene Zertifizierung von PGP-Schlüsseln auf ihrem Messestand ein. Glücklicherweise erwiesen sich nach ersten Analysen der kur...

This paper provides a limit result for the provision of a public good in a mechanism design framework as the number of agents gets large. A canonical example for a public good that is produced with a direct provision technology is Open Source Software. 1 Motivation Limit theorems for the provision of goods under asymmetric information about individual valuations with many agents yield strongly ...

The dilution of academic standards and poor quality publications have become a global concern. Recently, in an editorial of Current Science, SC Lakhotia, an eminent scientist from Banaras Hindu University (BHU) has raised a very important issue regarding predatory journals and academic pollution. This problem is presently worrying almost every conscientious academician. [1] Substantial efforts ...