Projection of relativistically moving objects on a two-dimensional plane, the `train' paradox and the visibility of the Lorentz contraction

Although many papers have appeared on the theory of photographing relativistically moving objects, pioneered by the classic work of Penrose and Terrell, three problems remain outstanding. (1) There does not seem to exist a general formula which gives the projection of a relativistically moving object, applicable to any object no matter how complicated, on a two-dimensional plane in conformity with Terrell's observation. (2) No resolution seems to have been provided for the associated so-called `train' paradox. (3) No analytical demonstration seems to have been offered on how the Lorentz contraction may be actually detected on a photograph. This paper addresses all of these three problems. The analysis does not require any more than trigonometry and elementary differentiation.Comment: LaTeX, 14 pages, 6 figures, misprint correcte

Functional treatment of quantum scattering via the dynamical principle

A careful functional treatment of quantum scattering is given using Schwinger's dynamical principle which involves a functional differentiation operation applied to a generating functional written in closed form. For long range interactions, such as for the Coulomb one, it is shown that this expression may be used to obtain explicitly the asymptotic "free" modified Green function near the energy shell.Comment: 7 page

Graffiti on Cities’ Forgotten Landscapes: An Application of Adverse Possession Law to the Visual Artists Rights Act

Artists use any surface available to them as a canvas. There is the common: cloth and paper; the modern: skin; and even the illegal: buildings and privately-owned property. However, today, the cultural value that artwork instills in its community has grown, regardless of its legal status. Examples can be found in artwork created by graffiti artist Banksy, or even the urban installations of Tyree Guyton, creator of the Heidelberg Project in Detroit. Artists create masterpieces placed in plain sight that enrich the surrounding communities but often interfere with others’ property rights. However, the illegal or encroaching nature of the artwork makes it vulnerable to destruction just as often as it brings it fame. What if the hard work that artists put into creating their urban artwork was not in vain? What if there was a way artists could consistently protect artistic moral rights against the property rights of building owners who have abandoned any upkeep or maintenance on the building, or who have not seen the building in years

The Enzymatic Microestimation of Urea

Peer Reviewe