Stability analysis of closed-path tape transports

Institute of Mechanical Engineering, St. Petersburg. Translated from Prikladnaya Mekhanika, Vol. 28, No. 2, pp. 67–74, February, 1992.     

Quasiwidths and optimization of methods of mixed approximation of multidimensional singular integrals with kernels of hilbert type

We consider the problem of application of mixed methods to the construction of algorithms, optimal in accuracy, for the calculation of multidimensional singular integrals with Hilbert-type kernels. We propose a method for the optimization of cubature formulas for singular integrals with Hilbert-type kernels based on the theory of quasiwidths.     

Spectral measurements of reflected radiation brightness for monitoring the dispersion and moisture content of concentrated water-oil emulsions

Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 49, No. 6, pp. 990–994, December, 1988.     

Synthesis of 1,4-dioxo-5,8-endomethylene-3,8,9,10-tetrahydrobenz-2,3-oxazine from 3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride

Latvian Institute for Organic Synthesis, Riga LV-1006. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, 417–418. March, 1995. Original article submitted February 13, 1995.     

Space-time locality in theSp(2)-symmetric Lagrangian formalism

The existence of a local solution to the Sp(2) master equation for the gauge field theory is proved in the perturbation theory under standard regularity assumptions for the action. The arbitrariness of solutions to the Sp(2) master equation is described, provided they are proper. The effective action can be chosen to be Sp(2) invariant and (under the additional assumption that the gauge transformation generators are Lorentz tensors) Lorentz invariant. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 115. No. 3, pp. 373–388, June, 1998.     

Features of the extraction of essential oils from plant raw material in the presence of surface-active agents

It has been established that the influence of surface-active agents (SAAs), on the extraction of essential oils (EOs) is connected with a fall in the surface tension of water, which facilitates the process of steeping, wetting, and swelling of plant raw material and also the solubilization of the EOs in micellar solutions of SAAs. A. Sultanov Uzbek Scientific Research Institute of Pharmaceutical Chemistry, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 648–652, September–October, 1998.