In this paper we analyze the physical meaning of suband superluminal soliton-like solutions (as the X-waves) of the relativistic wave equations and of some non-trivial solutions of the free Schrödinger equations for which the concepts of phase and group velocities have a different meaning than in the case of plane wave solutions. If we accept the strict validity of the principle of relativity, ...

Launching the Tidal Model: evaluating the evidence This paper reports on two evaluations of the Tidal Model, in the context of two separate acute admission wards, one in Birmingham (2004) and the other in Newcastle (2001), and makes recommendations concerning the criteria and type of reasoning appropriate to evaluating the evidence the two projects have generated. In the Birmingham study, resul...

The security model of the Android OS is based on the effective combination of a number of well-known security mechanisms (e.g. statically defined permissions for applications, the isolation offered by the Dalvik Virtual Machine, and the well-known Linux discretionary access control model). Although each security mechanism has been extensively tested and proved to be effective in isolation, thei...

which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. decided to make a new section of sub-specialty " Biomedical Engineering " in addition to 36 present sections. A few articles in the field of biomedical engineering have been published every year in JKMS under several subspe-cialty categories. The new section...

financial derivatives are new instruments through which hedging, investment and arbitrage are done in a modern economy. although the word 'derivative'primarily reminds us of options and futures, the major focus of the equity derivatives industry worldwide is on index derivatives. launching index options and index futures in tehran stock exchange, not only increases financial market de...

Vascular cognitive impairment/vascular dementia have been the subject of a large number of studies, due to their high prevalence and broad preventive and compensatory therapeutic potential. The knowledge of the cerebral anatomy correlated to the vascular territories of irrigation enables understanding of clinical manifestations, as well as classification into the several types of syndromic pres...

Theoretical studies of the properties of nonlinear grating structures'3 have predicted the existence of gap solitons in these media. Recent experiments by Sankey et al. 4 confirm some of these predictions; in particular, they observe all-optical switching behavior' in silicon waveguide structures. The switching occurs between a low-transmissivity state, in which the structure essentially behave...

T he BRCA1 gene was cloned in 1994 as the first tumor suppressor of hereditary breast cancer, and it has been heavily studied ever since. The Brca1 protein is multifunctional and critical for the maintenance of genomic stability. Among its many roles, Brca1 is part of an E3 ubiquitin ligase important for homologous recombination (HR) and signaling of double-strand DNA breaks (DSBs). In response...

We carried out axisymmetric simulations of disk accretion to a rapidly rotating magnetized star in the “propeller” regime. Simulations show that propellers may be “weak” (with no outflows), and “strong” (with outflows). Investigation of the difference between these two regimes have shown that outflows appear only in the case where the “friction” between the disk and magnetosphere is sufficientl...

ost offices are well aware of the hassles involved in administering flu vaccines. By November, the phone lines become jammed with patients asking, “When will it be available?” “How much will it cost?” “Do I need an appointment?” and “Can my sister get one even if she’s not a patient of yours?” Meeting this demand ties up resources and makes it hard to get regular business done. The vaccine shor...