Shielding and synchrotron radiation in toroidal waveguide

We develop a new approach to the calculation of the synchrotron radiation in a toroidal vacuum chamber. Using a small parameter ɛ = √ a/R, wherea is the characteristic size of the cross section of the toroid and R is the bending radius, we simplify Maxwell’s equations assuming that the characteristic frequency of the modes ω ∼ c/aɛ, and neglecte terms of higher order in ɛ. For a rectangular cross section of the waveguide, we find an analytical solution of the equations and analyze their asymptotics at very high frequency. We then obtain an equation which gives radiation into each synchronous mode. We demonstrate the flexibility of the new method by calculating the frequencies and the loss factors for the lowest modes in a square and round waveguides. For short bunches of high-energy electrons or positrons, typical for modern accelerators and photon sources, one of the important elements of the beam dynamics is the effect of coherent synchrotron radiation (CSR) of the beam [1]. In vacuum, if the reduced wavelength of the radiation exceeds the bunch length, the beam radiates coherently, and the power of the radiation increases many orders of magnitude relative to the incoherent radiation at the sam

The evolution of European policies on investment arbitration.

Over the last two decades, the European Commission radically altered its attitude towards investment arbitration and became its fierce opponent. This article considers the history of this change, attempts to fathom the pragmatic thinking of the European policy-makers, and considers its wisdom. The article analyses legal instruments that allowed the EU to implement the reform, examines their compliance with the Washington Convention 1965 and the Energy Charter Treaty and considers their practical effects on investment in Europe. It makes use of the historical and comparative legal methodology and occasionally relies on statistical data. The reasons behind the EU policies might have included the global backlash against the current system, the dissatisfaction with the Member States being targeted as respondents, the aspirations to move the Union towards a more centralised federation, and possibly the populist motives. Having started with the intra-EU BITs, the EU authorities are now leading the way of the global reform of ISDS with the idea of permanent tribunals bearing a strong resemblance to the state judiciary. Many remain sceptical, and the initial economic effects were unfavourable. A surprising aspect was the role the CJEU had to play. It delivered a decisive blow to the existing system in alignment with the Commission's policies, but without openly admitting the motives behind its decisions, and relying instead on the principle of autonomy of the EU law

The Vampire and the FOOL

This paper presents new features recently implemented in the theorem prover Vampire, namely support for first-order logic with a first class boolean sort (FOOL) and polymorphic arrays. In addition to having a first class boolean sort, FOOL also contains if-then-else and let-in expressions. We argue that presented extensions facilitate reasoning-based program analysis, both by increasing the expressivity of first-order reasoners and by gains in efficiency

Geological-morphological description of the Sedna and Guinevre planitiae on Venus (photomap sheets B-11, B-20, B-21)

Presented are descriptions and maps of the region of Sedna and Guinevra Planitiae--representatives of the largest geological providense on Venus comprised of volcanic rock. Units of different age are isolated and their relations are given, as well as interpretations of proposed mechanisms of formation

Geological-morphological description of the Ishtar Terra (photomap of the Venusian surface sheet B-5)

The main part of the Ishtar Terra east of the Maxwell Montes is covered with systems of areal dislocations of several directions, which are called Parquet. According to the structural patterns these may be divided into: (1) the central stable block; (2) the lesser peripheral blocks separated from the central one by gaps and grabens; (3) the zones of mobilized parquet, whose substance flowed downward at an incline in the directions away from the central block in the form of plastic flows; and (4) the partially parqueted lava sheets. The Maxwell Montes were formed as a result of the collision between the central parquet block and the Lakshmi Planum

Metabolic profiling of human lung cancer blood plasma using 1H NMR spectroscopy

Lung cancer (both small cell and non-small cell) is the second most common cancer in both men and women. The article represents results of evaluating of the plasma metabolic profiles of 100 lung cancer patients and 100 controls to investigate significant metabolites using 400 MHz 1H NMR spectrometer. The results of multivariate statistical analysis show that a medium-field NMR spectrometer can obtain the data which are already sufficient for clinical metabolomics

IMMEDIATE RESULTS OF HEPATECTOMY FOR METASTATIC COLORECTAL CANCER

Incorporation of bevacizumab to preoperative regional chemotherapy (CT) failed to increase the volume of intraoperative blood loss and the frequency of postoperative complications. Addition of the drug in the regional CT group significantly enhanced the rate of its effect up to 64 % and that of grade III medical pathomorphism up to 55 %. Regardless of the pattern of surgeries, the rate of complications after extended hepatectomy did not differ significantly in the treatment groups. Irrespective of treatment, the rate of acute liver failure rose when the volume of surgery was increased from conventional hemihepatectomy to extended hemihepatectomy. Acute liver failure was prominent (21%) among the complications in the treatment group. The highest incidence of acute liver failure in the comparable groups was observed in the preoperative regional CT group