The application of controllable shunt compensation by magnetic biased type controllable shunt reactors (CSR) is considered for improving the properties of long-length transmission lines by giving the example of Russian North-West 330 kV Kola-Karelian Interconnection. The reactive power consumed by CSRs in any operation condition is coordinated with the power flow through the line and voltage drop across the lines. The transfer capability is limited only by permissible current through the conductors. The investigations carried out completely confirm this statement. The type of AC transmission system proposed is strongly recommended to use as a reliable interconnection between the distant power systems.Index Terms--transmission lines, controllable shunt reactors, voltage control, steady state stability, power system transient stability. interests include power system stability problems as well as the issues of large energy pools operation, analysis and planning.

Industrial enterprises are responsible for increasing production waste. The purpose of the research is to develop tools of material resources management in lean production for sheet metal cutting at engineering enterprises with single or serial types of production. At the previous stages of the research, a situational analysis of the cutting process was conducted, a literature review was carried out, and the main provisions of the sorting method of sheet metal material resources after cutting were defined for dividing them into groups of business or non-business material resources. The main provisions of the proposed method are specified in this article. Further research tasks are also identified.

Improving the economic efficiency of industrial enterprises and ensuring their sustainable development depend, in particular, on the using of material resources management tools (MR) based on the principles of lean production using information technology. At the same time, the research of internal supply chains at enterprise allows identifying the main participants in the process, the material and information flows between them, determining the necessary change in the supply chain during the development of allocation innovations taking into account trends of digital economy. At the engineering enterprises, the managers face the task of increasing a sheet metal utilization rate in order to reduce unit technological costs, optimize the cost structure and increase net income. The relevance of this issue is confirmed by the theoretical and practical works of researchers in the field of cutting and packaging tasks, as well as in terms of the environmental problems which are because of increasing production and consumption waste. The purpose of the research is to develop tools of material resources management in lean production for sheet metal cutting at engineering enterprises with single or serial types of production. The tools are also based on the using of information technologies in economic system of an enterprise. At the previous stages of the research a situational analysis of sheet metal cutting and sheet metal material resources management at engineering enterprises was conducted, the main provisions of the sorting method of sheet metal MR after cutting were defined, approbation of certain aspects of the method was carried out using sheet metal cutting cards. The aspects related to micro logistical processes at an enterprise are specified in this article. Further research tasks are also identified.

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Photonic materials based on metal halide perovskites undergo rapid development owing to their unique optical properties and facile synthesis. Concurrently, there is also a growing interest in integrated photonics that can combine several elements on one chip. Nowadays technologies of integrated photonics are based on the traditional mask lithography combined with physical or chemical deposition methods. In this study, the possibility of facile fabrication of a simple pair of photonic elements is addressed, such as a microresonator with an outcoupling waveguide by means of inkjet printing on a glass substrate covered by a layer of polydimethylsiloxane (PDMS). The printed laser has revealed an appreciably high laser emission with a Q‐factor of 3300 and a threshold excitation fluence of 34 µJ·cm−2. The outcoupling waveguide has demonstrated the capability to transfer a reasonable part of the emitted radiation. The experimental results with a numerical simulation based on an appropriate physical model are also rationalized. Thus, the study points out a perspective for integrated photonics to be possibly implemented with this relatively cheap, flexible, and scalable fabrication method.