Electrical and Dielectric Properties of Nanoisland Systems Below Percolation Threshold

Electric and dielectric properties of nanoisland metal films were studied in this work. Permittivity of these films was determined from the analysis of the dependences of the susceptance of the films. It is found that the effective permittivity of the researched structures has abnormally high positive value (107-108). The temperature dependence of the permittivity of the films practically does not differ from the temperature dependence of the conductivity of these films. Such behavior of these dependences is possible, if the reasons for the change of permittivity and conductivity of the films with the temperature are of the same nature. With the growth of the electric field effective permittivity of the films decreases and the conductivity increases. The cause behind the high effective permittivity of the films is the island nature of these metal films, and it is associated with the polarization of the dipoles, formed by couples negatively and positively charged metal islands. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3481

Multilayered Structures from Periodically Alternating Magnetic Island Layers: Magnetization Processes and Magnetoresistance

The multilayered structures from periodically alternating of island layers of various ferromagnetic are investigated. This island structures possessed a magnetoresistance of ~1-3 % and can detect of superweak magnetic fields up to 10-6 Oe at room temperature that allows using them as sensors of magnetic fields. The new specific vorticose states of magnetization which arises under some conditions in island structures is offered. Magnetization of these vortical states is distributed on many islands of island structures. It is supposed, what exactly this vortical magnetization is responsible for appearance of unidirectional magnetic anisotropy too. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3530

Excerpts from the life of the bukharian artist

The article examines and scientifically analyzes the works of the famous Bukhara miniaturist Sadriddin Pochchayev, covering the history of the last period of the Bukhara Emirate and the former Soviet government. In particular, the study of the Middle Ages, the emirate, historical events of the former Soviet Union, miniatures, portraits, jewelry depicting subjects. The article also recommends visiting the Bukhara Museum of Fine Arts for an exhibition of works by the famous Bukhara miniaturist Sadriddin Pochchayev

Targeting neurons with small molecule probes: from imaging to modulation

Our body is governed through a complex network of diverse set of synapses created by many different neurons, which extend throughout the body. A great progress has been made to monitor and modulate these cells using genetic methods in limited settings, while chemical approaches have not achieved comparable successful results. Yet given the versatility of chemical probes, it has been important to create platforms which would allow us to generate compounds with characteristics of neuronal targeting and modulation. In our effort to modulate neurons and their synapses, a platform of assays was developed to find agonists and modulators of the brain derived neurotrophic factor, BDNF, and its receptor, TrkB, which is a central signaling system for neurogenesis and synaptic plasticity. These assays were used to evaluate reported TrkB agonists and perform a high throughput screen. In addition, an alternative approach in the form of phage display targeting TrkB was employed, since TrkB proved to be a challenging target for identification of small molecule agonist or modulator. To visualize different parts as well as various types of neurons, two different platforms were developed. A diversity oriented fluorescent library coupled with high content screening provided an opportunity to identify probes that could specifically stain neurons and synapses. In the second approach a new phage display method was developed that could identify probes with the ability to bind to neuronal cell surface markers. The developed platforms that we developed have a great potential to generate promising probes for vast array of applications

Kichik biznesning moliyaviy resurs manbalari

Maqolada kichik biznesning moliyaviy resurs manbalari to‘g‘risida fikr yuritilgan. Shuningdek maqolada zarar ko’rib ishlayotgan kichik biznes korxonalarini moliyalashtirish manbalari to‘g‘risida bayon etilgan

Der Kusch-Tepa-Kanal in Nordafghanistan: Faustpfand der Taliban, Bürde für Zentralasien?

2022 haben die Taliban im Norden Afghanistans mit dem Bau des Kusch-Tepa-Kanals und damit der Umsetzung einer Idee begonnen, die noch auf den ersten Präsidenten Mohammad Daoud Khan aus den 1970er Jahren zurückgeht. Aufgrund der anhaltenden Ernährungskrise ist das Großbauprojekt, das in den Provinzen Balch, Dschuzdschan und Farjab enorme landwirtschaftliche Potenziale freisetzen könnte, von hoher Priorität für die seit 2021 regierenden Taliban. Seit dem Baubeginn im März 2022 wird im Höchsttempo an dem Kanal gearbeitet und von den geplanten 285 Kilometern wurden bereits rund 100 Kilometer fertiggestellt. Da sich der Kanal aus dem Amu-Darja speist, von dem er bis zu 20 % der jährlichen Wassermenge abzweigen könnte, birgt das Projekt Risiken, Konflikte mit den Nachbarstaaten Usbekistan und Turkmenistan hervorzurufen, die ihre Landwirtschaft durch den Kanal gefährdet sehen. Der Beitrag untersucht die regionalen Implikationen des Bauprojektes, das u. a. wirtschaftliche, rechtliche und geopolitische Fragen aufwirft

Factors Affecting the Sensitivity of Moving Electromagnetic Screen Converters

The article found that by changing the parameters affecting the sensitivity of the moving screen converters, the screen should be made of materials with a small coefficient of temperature change, even if the specific resistance is large, and the high active resistance of the moving screen does not affect the linearity of the static characteristic

Im Griff des Drachen? Usbekistans technologische Abhängigkeit von China als strategische Herausforderung für den grünen Wandel

Die usbekische Regierung strebt bis 2050 vollständige Klimaneutralität an und setzt dafür aktuell eine Reihe von ehrgeizigen Projekten im Bereich der erneuerbaren Energien um. Während Taschkent für geplante Solar- und Windkraftprojekte eine Vielzahl internationaler Investoren gewinnen konnte, stammen die technologischen Komponenten zur Umsetzung der Projekte überwiegend aus China. Im Bereich der Elektrofahrzeuge genießt China schon heute fast eine Monopolstellung im Land. Der Beitrag beleuchtet die strategischen Implikationen der technologischen Abhängigkeit von China für den grünen Wandel in Usbekistan. Eine weitere Vertiefung dieser Abhängigkeit könnte die wirtschaftliche Autonomie des Landes gefährden und den Erfolg der Transformation des Energiesektors übermäßig an externe Akteure und Faktoren koppeln