Model for Evaluating the Effectiveness of Search Operations

An automated search with human involvement consisting of two stages is given detailed consideration in this paper. In the first stage, a search without direct human involvement is implemented. In the second stage, the search assumes human involvement. Evaluations of the search operations' effectiveness are presented. These operations are implemented for searching one object exclusively among a variety of similar objects. The average number of similar objects recommended for further analysis was used as effectiveness indicator. A set of numerical evaluation criteria for search effectiveness is introduced. The basis of the search block is a pattern recognition algorithm characterized by two probabilities: 1) probability of missing a target, and 2) false alarm probability. An analytical model of the search block was developed. In this paper particular attention is given to the average length of the recommendatory list as an effectiveness indicator. Four properties of this indicator were determined

Electrical stress effect on Josephson tunneling through ultrathin AlOx barrier in Nb/Al/AlOx/Nb junctions

The effect of dc electrical stress and breakdown on Josephson and quasiparticle tunneling in Nb/Al/AlOx/Nb junctions with ultrathin AlOx barriers typical for applications in superconductor digital electronics has been investigated. The junctions' conductance at room temperature and current-voltage (I-V) characteristics at 4.2 K have been measured after the consecutive stressing of the tunnel barrier at room temperature. Electrical stress was applied using current ramps with increasing amplitude ranging from 0 to ~1000 Ic corresponding to voltages across the barrier up to 0.65 V where Ic is the Josephson critical current. A very soft breakdown has been observed with polarity-dependent breakdown current (voltage). A dramatic increase in subgap conductance of the junctions, the appearance of subharmonic current steps, and gradual increase in both the critical and the excess currents as well as a decrease in the normal-state resistance have been observed. The observed changes in superconducting tunneling suggest a model in which a progressively increasing number of defects and associated additional conduction channels (superconducting quantum point contacts (SQPCs)) are induced by electric field in the tunnel barrier. By comparing the I-V characteristics of these conduction channels with the nonstationary theory of current transport in SQPCs based on multiple Andreev reflections by Averin and Bardas, the typical transparency D of the induced SQPCs was estimated as D ~ 0.7. The number of induced SQPCs was found to grow with voltage across the barrier as sinh(V/V_0) with V_0 = 0.045 V, in good agreement with the proposed model of defect formation by ion electromigration. The observed polarity dependence of the breakdown current (voltage) is also consistent with the model.Comment: 11 pages, 10 figure

PROSPECTS OF SOCIAL AND ECONOMIC DEVELOPMENT OF THE BELGOROD REGION AS A BORDER AREA

Abstract. Crisis phenomena in the modern economy of Russia, as well as the world as a whole, unstableinternational relations with sanctions, destabilization of the political situation in Ukraine cause the relevance of the study of the development of border regions as a sphere of interaction of neighboring states, depending on social and economic development, needs and level of conflict. It can cover trade, investment, agro-industrial complex; cross-border cooperation can develop in multiple areas, contributing to the development and strengthening of economic, cultural, humanitarian relations between the border territories of the Russian Federation and neighboring countries, facilitating the creation and effective development of economic and social infrastructure in the border areas. Due to the situation in Ukraine, the question arises of the need to study the influence of the unstable political and economic development of the neighboring state on the social and economic development of the Belgorod region as a border area. Main results: the features of the development of the Belgorod region as a border territory, the impact of the political and economic crisis in Ukraine on the socio-economic development prospects of the region, and the features of international cooperation of the neighboring regions at the present time are considered.Keywords: Social and economic development, border region, border, import, export, migration flow, embargo, patent

Two Integration Projects in Europe: Dead End of Struggle

The report represents the first part of a project targeting the problems and prospects of two economic integration projects in Greater Europe — the European project (European Union) and the Eurasian project (Russia, the Customs Union and the Eurasian Economic Union). This topic is particularly relevant in light of the Ukrainian crisis, the signing of Association Agreements with the EU by Georgia, Moldova and Ukraine, as well as the looming threat of „continental fracture‟

Two Integration Projects in Europe: Dead End of Struggle

The report represents the first part of a project targeting the problems and prospects of two economic integration projects in Greater Europe — the European project (European Union) and the Eurasian project (Russia, the Customs Union and the Eurasian Economic Union). This topic is particularly relevant in light of the Ukrainian crisis, the signing of Association Agreements with the EU by Georgia, Moldova and Ukraine, as well as the looming threat of „continental fracture‟