Free-Space Quantum Key Distribution

Based on the firm laws of physics rather than unproven foundations of mathematical complexity, quantum cryptography provides a radically different solution for encryption and promises unconditional security. Quantum cryptography systems are typically built between two nodes connected to each other through fiber optic. This chapter focuses on quantum cryptography systems operating over free-space optical channels as a cost-effective and license-free alternative to fiber optic counterparts. It provides an overview of the different parts of an experimental free-space quantum communication link developed in the Spanish National Research Council (Madrid, Spain).Comment: 22 pages, 15 figure

Natural pressured gas vehicles filling stations: guidelines for performing a course project

The guide includes general guidelines, content, and procedure for performing a course project, the amount of its graphical part and list of literature. For students of the specialty code 142 «Power Machinery» of the specialization «Gas Turbine Plants and Compressor Stations».Посібник містить загальні рекомендації, зміст та порядок виконання курсового проекту, кількість його графічної частини та перелік літератури. Для студентів спеціальності 142 «Енергетичне машинобудування» спеціалізація «Газотурбінні установки і компресорні станції».Пособие содержит общие рекомендации, содержание и порядок выполнения курсового проекта, количество его графической части и перечень литературы. Для студентов специальности 142 «Энергетическое машиностроение» специализация «Газотурбинные установки и компрессорные станции»

Unsupervised discovery of temporal sequences in high-dimensional datasets, with applications to neuroscience.

Identifying low-dimensional features that describe large-scale neural recordings is a major challenge in neuroscience. Repeated temporal patterns (sequences) are thought to be a salient feature of neural dynamics, but are not succinctly captured by traditional dimensionality reduction techniques. Here, we describe a software toolbox-called seqNMF-with new methods for extracting informative, non-redundant, sequences from high-dimensional neural data, testing the significance of these extracted patterns, and assessing the prevalence of sequential structure in data. We test these methods on simulated data under multiple noise conditions, and on several real neural and behavioral datas. In hippocampal data, seqNMF identifies neural sequences that match those calculated manually by reference to behavioral events. In songbird data, seqNMF discovers neural sequences in untutored birds that lack stereotyped songs. Thus, by identifying temporal structure directly from neural data, seqNMF enables dissection of complex neural circuits without relying on temporal references from stimuli or behavioral outputs

Syndecan-3 and syndecan-4 are enriched in Schwann cell perinodal processes

BACKGROUND: Nodes of Ranvier correspond to specialized axonal domains where voltage-gated sodium channels are highly concentrated. In the peripheral nervous system, they are covered by Schwann cells microvilli, where three homologous cytoskeletal-associated proteins, ezrin, radixin and moesin (ERM proteins) have been found, to be enriched. These glial processes are thought to play a crucial role in organizing axonal nodal domains during development. However, little is known about the molecules present in Schwann cell processes that could mediate axoglial interactions. The aim of this study is to identify by immunocytochemistry transmembrane proteins enriched in Schwann cells processes that could interact, directly or indirectly, with axonal proteins. RESULTS: We show that syndecan-3 (S3) and syndecan-4 (S4), two proteoglycans expressed in Schwann cells, are enriched in perinodal processes in rat sciatic nerves. S3 labeling was localized in close vicinity of sodium channels as early as post-natal day 2, and highly concentrated at nodes of Ranvier in the adult. S4 immunoreactivity accumulated at nodes later, and was also prominent in internodal regions of myelinated fibers. Both S3 and S4 were co-localized with ezrin in perinodal processes. CONCLUSIONS: Our data identify S3 and S4 as transmembrane proteins specifically enriched in Schwann cell perinodal processes, and suggest that S3 may be involved in early axoglial interactions during development

Natural pressured gas vehicles filling stations: guidelines for performing a course project

The guide includes general guidelines, content, and procedure for performing a course project, the amount of its graphical part and list of literature. For students of the specialty code 142 «Power Machinery» of the specialization «Gas Turbine Plants and Compressor Stations».Посібник містить загальні рекомендації, зміст та порядок виконання курсового проекту, кількість його графічної частини та перелік літератури. Для студентів спеціальності 142 «Енергетичне машинобудування» спеціалізація «Газотурбінні установки і компресорні станції».Пособие содержит общие рекомендации, содержание и порядок выполнения курсового проекта, количество его графической части и перечень литературы. Для студентов специальности 142 «Энергетическое машиностроение» специализация «Газотурбинные установки и компрессорные станции»

Assessment of the effectiveness of correspondence teacher education

The article examines one of the features of the development of modern society is the process of informatization, which has now acquired a global character. It has been proven that under the influence of informatization, changes are currently taking place in all spheres of life. One of the elements of informatization are new information technologies, the use of which allows finding new approaches to solving various problems. The consequence of the general informatization of society is the informatization of education, one of the forms of which is distance learning. Distance education technology is an element of distance education. However, along with the intensive introduction of new educational technologies into the educational process, the question arises: how effective is the distance learning system

Methodological guidelines of dialogization of cultural and educational practices

The article deals with the methodological ideas of dialogue. It is stated that the dialogue, as a construct of understanding, is within the limits of constructivism to be the basis of the theoretical and methodological support of the spiritual development of a man. The attention is also focused on the functional purpose of the dialogue, namely on its definition as a goal (deliberately chosen image of the intended result) and as a mechanism of transformation of the world that infinitely creates new goals (goalsetting). Everyday dialogical communication outside the philosophical and nonscientific worldview positions of subjects often loses human activity and even makes it impossible for certain productive ways, means and receptions of interaction. In an effort to understand the world and another person, the person always faces new problems that require the abandonment of previous views, so the constructs allow you to gradually move in the world of objects by doing logical operations, interpreting them for mutual understanding