Electronic divider and multiplier using photocells Patent

Electronic divider and multiplier for analog electric signal

Heat-shrink plastic tubing seals joints in glass tubing

Small units of standard glass apparatus held together by short lengths of transparent heat-shrinkable polyolefin tubing. The tubing is shrunk over glass O-ring type connectors having O-rings but no lubricant

Iterated amplitudes in the high-energy limit

We consider the high-energy limits of the colour ordered four-, five- and six-gluon MHV amplitudes of the maximally supersymmetric QCD in the multi-Regge kinematics where all the gluons are strongly ordered in rapidity. We show that various building blocks occurring in the Regge factorisation (the Regge trajectory, the coefficient functions and the Lipatov vertex) satisfy an iterative structure very similar to the Bern-Dixon-Smirnov (BDS) ansatz. This iterative structure, combined with the universality of the building blocks, enables us to show that in the Euclidean region any two- and three-loop amplitude in multi-Regge kinematics is guaranteed to satisfy the BDS ansatz. We also consider slightly more general kinematics where the strong rapidity ordering applies to all the gluons except the two with either the largest or smallest rapidities, and we derive the iterative formula for the associated coefficient function. We show that in this kinematic limit the BDS ansatz is also satisfied. Finally, we argue that only for more general kinematics - e.g. with three gluons having similar rapidities, or where the two central gluons have similar rapidities - can a disagreement with the BDS ansatz arise.Comment: Version corresponding to the Erratum sent to JHEP on October 16th 200

Macro-financial vulnerabilities and future financial stress: assessing systemic risks and predicting systemic events

This paper develops a framework for assessing systemic risks and for predicting (out-of-sample) systemic events, i.e. periods of extreme financial instability with potential real costs. We test the ability of a wide range of “stand alone” and composite indicators in predicting systemic events and evaluate them by taking into account policy makers’ preferences between false alarms and missing signals. Our results highlight the importance of considering jointly various indicators in a multivariate framework. We find that taking into account jointly domestic and global macrofinancial vulnerabilities greatly improves the performance of discrete choice models in forecasting systemic events. Our framework shows a good out-of-sample performance in predicting the last financial crisis. Finally, our model would have issued an early warning signal for the United States in 2006 Q2, 5 quarters before the emergence of money markets tensions in August 2007. JEL Classification: E44, E58, F01, F37, G01Asset Price Booms and Busts, Early Warning Indicators, Financial stress, Macro-Prudential Policies

The massless hexagon integral in D = 6 dimensions

We evaluate the massless one-loop hexagon integral in six dimensions. The result is given in terms of standard polylogarithms of uniform transcendental weight three, its functional form resembling the one of the remainder function of the two-loop hexagon Wilson loop in four dimensions.Comment: 3 page

The One-Loop One-Mass Hexagon Integral in D=6 Dimensions

We evaluate analytically the one-loop one-mass hexagon in six dimensions. The result is given in terms of standard polylogarithms of uniform transcendental weight three.Comment: 9 page

Using Extended Realities To Teach Construction Management

This project aimed to analyze the implementation of extended realities to teach construction management at the university level. Extended realities in this context are referring to augmented reality (AR) and virtual reality (VR); these are the two for which funding was received by Cavrnus. The foundation for this project started with the pre-existing lesson for the California Polytechnic State University’s (Cal Poly) residential construction class. The original lesson was constructed with the students learning the wood framing of a house by reading. While this is a suitable learning method for some it is not the best for all. This project introduces VR and AR into the learning environment bringing kinesthetic and visual learning into the scenario. The theory is by providing a 3D experience one can improve the amount of information retained. With the information gathered, it is determined that VR and AR could be used more in the near future and a good resource to teach. However, there are some software issues that need to be worked on before it becomes available for teaching purposes

Scientific inquiry based education and FOSS

ВВПЗ являє собою важливий компонент у просуванні та реалізації наукового дослідження на основі концепції освіти в рамках сучасного університету. Там представлені деякі приклади застосування ВВПЗ в організації освіти, наукових досліджень і управлінської діяльності Університету Академії наук Молдови.FOSS represents an important component in promotion and implementation of scientific inquiry based education concept in frame of a modern University. There are presented some examples of application of FOSSes in organization of educational, research and management activity of the University of the Academy of Sciences of Moldova