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Recent research

Analysis of the weathering of solid waste incineration ash evaluated by indices for natural rock

Incineration treatment of municipal solid waste generates inorganic ash. The question arises as to whether waste incineration ash is converted to natural soil after it is disposed in landfill sites? And importantly, if so, how long would take?

Production and application of PHB.

Heat distribution control with a new zone-control induction heating system

Heat processing of next-generation wide-band gap semiconductors is expected to require temperatures higher than 1500 K and rapid heat-up rates of greater than 100 K/s. Of the various methods available for high temperature treatment of semiconductors high-frequency induction heating is one of the most promising candidates that satisfies the aforementioned requirements.

System configuration of the developed zone-control induction heating system.

Polysilane rings: Selective cyclopolymerization using transition metals

Polysilanes, composed of the Si–Si linkage, exhibit unique electronic and optical properties that result from the extensive delocalization of σ-electrons along the polymer backbones.

(a) Nickel-catalyzed polymerization to afford linear or cyclic polysilanes and (b) one of possible intermediates in the cyclopolymerization.

Advances in mathematics: Solution to a problem in the nineteenth century theory of meromorphic functions

General theory of meromorphic functions in the complex plane began in the nineteenth century, when E. Picard proved his famous ‘Picard’s little theorem’. Then, in the 1920s, R. Nevanlinna created the modern theory of meromorphic functions, where his ‘second main theorem (SMT)’ provides a far-reaching generalization of Picard’s theorem. Nowadays, the theory is well-established as a result of many excellent research studies. Nevertheless, the theory still has several unresolved problems, including the following one:

The statement of Gol’dberg conjecture from the original paper.