4,608 research outputs found
Expedition diary β insights into the history of organizing and conducting Russian Arctic expeditions in the early XXth century
The collections belonging to the Museum-Archive of the history of study and development of the European North of the Barents Center of the Humanities β Branch of the Federal Research Center Β«Kola Science Centre of the Russian Academy of SciencesΒ» (BCH KSC RAS), contain several handwritten diaries by members of Arctic expeditions organized in the first half of the XXth century. The article discusses the value of the expedition diary of a member of a Russian Arctic expedition to Dikson Island (1916), the hydrometeorologist Innokenty Tikhomirov (1890β1955), as a possible source of data on the history of organizing and conducting scientific research in the Arctic. Based on the data presented in the diary, the paper reconstructs the progress of work on the organization of the northernmost meteorological station on Dikson Island in 1916.Π ΡΠΎΠ½Π΄Π°Ρ
, ΠΏΡΠΈΠ½Π°Π΄Π»Π΅ΠΆΠ°ΡΠΈΡ
ΠΡΠ·Π΅Ρ-Π°ΡΡ
ΠΈΠ²Ρ ΠΈΡΡΠΎΡΠΈΠΈ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΠΈ ΠΎΡΠ²ΠΎΠ΅Π½ΠΈΡ ΠΠ²ΡΠΎΠΏΠ΅ΠΉΡΠΊΠΎΠ³ΠΎ Π‘Π΅Π²Π΅ΡΠ° Π¦Π΅Π½ΡΡΠ° Π³ΡΠΌΠ°Π½ΠΈΡΠ°ΡΠ½ΡΡ
ΠΏΡΠΎΠ±Π»Π΅ΠΌ ΠΠ°ΡΠ΅Π½Ρ ΡΠ΅Π³ΠΈΠΎΠ½Π° β ΡΠΈΠ»ΠΈΠ°Π»Π° Π€ΠΠ¦ ΠΠΠ¦ Π ΠΠ, Ρ
ΡΠ°Π½ΡΡΡΡ Π½Π΅ΡΠΊΠΎΠ»ΡΠΊΠΎ ΡΡΠΊΠΎΠΏΠΈΡΠ½ΡΡ
Π΄Π½Π΅Π²Π½ΠΈΠΊΠΎΠ², Π°Π²ΡΠΎΡΡ ΠΊΠΎΡΠΎΡΡΡ
Π² ΠΏΠ΅ΡΠ²ΠΎΠΉ ΠΏΠΎΠ»ΠΎΠ²ΠΈΠ½Π΅ Π₯Π₯ Π². Π±ΡΠ»ΠΈ ΡΡΠ°ΡΡΠ½ΠΈΠΊΠ°ΠΌΠΈ Π°ΡΠΊΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΊΡΠΏΠ΅Π΄ΠΈΡΠΈΠΉ. Π ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π» ΡΠΊΡΠΏΠ΅Π΄ΠΈΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ Π΄Π½Π΅Π²Π½ΠΈΠΊΠ° ΡΡΠ°ΡΡΠ½ΠΈΠΊΠ° ΡΠΎΡΡΠΈΠΉΡΠΊΠΎΠΉ ΡΠΊΡΠΏΠ΅Π΄ΠΈΡΠΈΠΈ Π½Π° ΠΎ. ΠΠΈΠΊΡΠΎΠ½ (1916) Π³ΠΈΠ΄ΡΠΎΠΌΠ΅ΡΠ΅ΠΎΡΠΎΠ»ΠΎΠ³Π° ΠΈ ΠΊΠ»ΠΈΠΌΠ°ΡΠΎΠ»ΠΎΠ³Π° ΠΠ½Π½ΠΎΠΊΠ΅Π½ΡΠΈΡ ΠΠΎΠ½ΡΡΠ°Π½ΡΠΈΠ½ΠΎΠ²ΠΈΡΠ° Π’ΠΈΡ
ΠΎΠΌΠΈΡΠΎΠ²Π° (1890β1955) ΠΊΠ°ΠΊ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΠ³ΠΎ ΠΈΡΡΠΎΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ° ΠΏΠΎ ΠΈΡΡΠΎΡΠΈΠΈ ΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΠΈ ΠΈ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ Π½Π°ΡΡΠ½ΡΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ Π² ΠΡΠΊΡΠΈΠΊΠ΅. ΠΠ»Π°Π³ΠΎΠ΄Π°ΡΡ Π΄Π½Π΅Π²Π½ΠΈΠΊΡ Π. Π. Π’ΠΈΡ
ΠΎΠΌΠΈΡΠΎΠ²Π° ΡΠ΅ΠΊΠΎΠ½ΡΡΡΡΠΈΡΠΎΠ²Π°Π½ Ρ
ΠΎΠ΄ ΡΠ°Π±ΠΎΡ ΠΏΠΎ ΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΠΈ Π² 1916 Π³. ΡΠ°ΠΌΠΎΠΉ ΡΠ΅Π²Π΅ΡΠ½ΠΎΠΉ Π½Π° ΡΠΎΡ ΠΌΠΎΠΌΠ΅Π½Ρ ΠΌΠ΅ΡΠ΅ΠΎΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡΠ°Π½ΡΠΈΠΈ Π½Π° ΠΎ. ΠΠΈΠΊΡΠΎΠ½
On the Centenary of Yekaterinburg Opera House and Music School n. a. Piotr Tchaikovsky: Archival Researches and Publications
ΠΡΠ²Π΅ΡΠ°Π΅ΡΡΡ ΠΈΡΡΠΎΡΠΈΡ Π°ΡΡ
ΠΈΠ²Π½ΡΡ
ΠΈΠ·ΡΡΠΊΠ°Π½ΠΈΠΉ ΠΈ ΠΏΠΎΠ΄Π³ΠΎΡΠΎΠ²ΠΊΠΈ ΠΊ ΠΈΠ·Π΄Π°Π½ΠΈΡ Π΄Π²ΡΡ
ΠΌΠΎΠ½ΠΎΠ³ΡΠ°ΡΠΈΠΉ: "ΠΠΈΠ²Π°Ρ ΠΆΠΈΠ·Π½Ρ ΡΠ΅Π°ΡΡΠ°: Π²Π΅ΠΊΠΎΠ²Π°Ρ ΠΏΠ°Π½ΠΎΡΠ°ΠΌΠ°, ΠΏΡΠ΅ΠΌΡΠ΅ΡΡ, ΠΌΠ°ΡΡΠ΅ΡΠ°", ΠΏΠΎΡΠ²ΡΡΠ΅Π½Π½Π°Ρ 100-Π»Π΅ΡΠΈΡ ΡΠ΅Π°ΡΡΠ° ΠΎΠΏΠ΅ΡΡ ΠΈ Π±Π°Π»Π΅ΡΠ°, ΠΈ "ΠΠ΅ΡΠ²ΠΎΠ΅ ΠΌΡΠ·ΡΠΊΠ°Π»ΡΠ½ΠΎΠ΅ ΡΡΠΈΠ»ΠΈΡΠ΅ Π£ΡΠ°Π»Π°", ΠΏΠΎΡΠ²ΡΡΠ΅Π½Π½ΠΎΠ΅ 100-Π»Π΅ΡΠΈΡ ΠΌΡΠ·ΡΠΊΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΡΠΈΠ»ΠΈΡΠ° ΠΈΠΌΠ΅Π½ΠΈ Π. Π. Π§Π°ΠΉΠΊΠΎΠ²ΡΠΊΠΎΠ³ΠΎ.There is exposed the history of archival researches and sub-editing of two monographs β βThe Vivid Life of Theatre: Panorama of the Century, First Nights, Mastersβ dedicated to the 100th anniversary of the Opera House and βThe First Music Schoolβ dedicated to the 100th anniversary of the Music School n. a. Piotr Tchaikovsky
From the Concept of National Security to the Concept of Civilizational Security as the Basis of Eurasian Integration
In the conditions of the global crisis of the modern world order, the nation-state ceases to be a form adequate to the globalizing world, transforming into corporations-states, on the one hand, and into states-civilizations, on the other. This objectively leads to the transformation of the concept of national security into the concept of civilizational security, corresponding to the needs of transforming states and societies in the conditions of active confrontation of competing concepts of the future global world order.Aim. Substantiation of the evolution of the concept of national security into the concept of civilizational security and identification of its essence.Tasks. Identification of objective reasons for the evolution of security concepts, their differences and essence, development of proposals for the formation of the concept of Eurasian civilizational security.Methods. The structural-functional approach, comparative-historical analysis, system analysis, generalization, synthesis were used.Results. In the process of the development of the global crisis of the world order, there is a growing crisis of national states as a form of organization of societies. In parallel with the transformation of the nation-state into a corporation-state and a state-civilization, there is an objective process of formation of a new concept of civilizational security. The main objects of civilizational security are systems of civilizational values and civilizational identities that ensure the very existence of both civilizations and civilizational States.Conclusions. The ess ence of civilizational security is the maintenance and defense by civilization of its identity based on its own system of values, its model of society and the state, its system of historical and spiritual coordinates
Estimation of Hydrodynamical Model Parameters from the Invariant Spectrum and the Bose-Einstein Correlations of pi-mesons Produced in (pi+/K+)p Interactions at 250 GeV/c
The invariant spectra of pi- mesons produced in (pi+/K+)p interactions at 250
GeV/c are analysed in the framework of the hydrodynamical model of
three-dimensionally expanding cylindrically symmetric finite systems.
A satisfactory description of experimental data is achieved.
The data favour the pattern according to which the hadron matter undergoes
predominantly longitudinal expansion and non-relativistic transverse expansion
with mean transverse velocity = 0.20(7), and is characterized by a large
temperature inhomogeneity in the transverse direction: the extracted freeze-out
temperature at the center of the tube and at the transverse rms radius are
140(3) MeV and 82(7) MeV, respectively. The width of the (longitudinal)
space-time rapidity distribution of the pion source is found to be Delta eta =
1.36(2).
Combining this estimate with results of the Bose-Einstein correlation
analysis in the same experiment, one extracts a mean freeze-out time of the
source of = 1.4(1) fm/c and its transverse geometrical rms radius, R_G
(rms)=1.2(2) fm.Comment: latex, 14 pages, 5 figure
Effects of rotation and systematic occlusion on fiducial marker recognition
Β© 2017 The Authors. Fiducial marker systems consist of patterns that are placed in environment for miscellaneous applications and are further automatically detected with cameras. A variety of applications determines the criteria, which characterize qualitative properties of a marker and include such evaluation benchmarks as resilience to occlusion, distance to a marker, false positive and false negative rates, sensitivity to illumination, and others. The paper compares existing ARTag, AprilTag, and CALTag systems utilizing a high fidelity camera, which is a main vision sensor of a full-size Russian humanoid robot AR-601M. In experiments the comparison of the three marker systems reliability and detection rate in occlusions of various types and intensities was verified. Finally, a preferable for AR-601M robot visual applications marker system was selected
Comparing fiducial marker systems in the presence of occlusion
Β© 2017 IEEE. A fiducial marker system is a system of unique 2D (planar) marker, which is placed in an environment and automatically will be detected with a camera with a help of a corresponding detection algorithm. Application areas of these markers include industrial systems, augmented reality, robots navigation, human-robot interaction and others. Marker system designed for such different applications must be robust to such factors as view angles, occlusions, changing distances, etc. This paper compares three existing systems of markers: ARTag, AprilTag, and CALTag. As a benchmark, we use their reliability and detection rate in presence of occlusions of various types and intensity. The paper presents experimental comparison of these markers. The marker detection was performed with a simple inexpensive Web camera
ARTag, AprilTag and CALTag fiducial marker systems: Comparison in a presence of partial marker occlusion and rotation
Β© 2017 by SCITEPRESS - Science and Technology Publications, Lda. All Rights Reserved. Fiducial marker systems consist of patterns that are placed in environment and are automatically detected with a camera using appropriate for the marker detection algorithm. Marker systems are useful for many modern visual applications such as augmented reality, robot navigation and collaboration, industrial and space robotics, and human-robot interaction. A variety of applications demands certain quality assurance for marker properties. Among the most common criteria are resistance to partial occlusion and rotation, sensitivity to lightning conditions, marker size, false positive and false negative rates. This paper compares three types of markers for their resistance to partial occlusion in various types of occlusion and resistance to normal, lateral, and longitudinal rotations. Intensive experimental comparison of tags is presented with analysis. Detection of markers was performed with a common Web camera. Based on our experimental results, we have selected a marker system, which should be preferred for real world applications when only simple inexpensive hardware is available and appearance of rotation and occlusion disturbances are expected in the environment. Our long term goal is to calibrate humanoid robot manipulators in real-world environment applying a pre-calibrated camera of the robot, while the presented in this paper results help selecting a most suitable marker system for further calibration procedures
The Layer 0 Inner Silicon Detector of the D0 Experiment
This paper describes the design, fabrication, installation and performance of
the new inner layer called Layer 0 (L0) that was inserted in the existing Run
IIa Silicon Micro-Strip Tracker (SMT) of the D0 experiment at the Fermilab
Tevatron collider. L0 provides tracking information from two layers of sensors,
which are mounted with center lines at a radial distance of 16.1 mm and 17.6 mm
respectively from the beam axis. The sensors and readout electronics are
mounted on a specially designed and fabricated carbon fiber structure that
includes cooling for sensor and readout electronics. The structure has a thin
polyimide circuit bonded to it so that the circuit couples electrically to the
carbon fiber allowing the support structure to be used both for detector
grounding and a low impedance connection between the remotely mounted hybrids
and the sensors.Comment: 28 pages, 9 figure
Correlation between nucleotide composition and folding energy of coding sequences with special attention to wobble bases
Background: The secondary structure and complexity of mRNA influences its
accessibility to regulatory molecules (proteins, micro-RNAs), its stability and
its level of expression. The mobile elements of the RNA sequence, the wobble
bases, are expected to regulate the formation of structures encompassing coding
sequences.
Results: The sequence/folding energy (FE) relationship was studied by
statistical, bioinformatic methods in 90 CDS containing 26,370 codons. I found
that the FE (dG) associated with coding sequences is significant and negative
(407 kcal/1000 bases, mean +/- S.E.M.) indicating that these sequences are able
to form structures. However, the FE has only a small free component, less than
10% of the total. The contribution of the 1st and 3rd codon bases to the FE is
larger than the contribution of the 2nd (central) bases. It is possible to
achieve a ~ 4-fold change in FE by altering the wobble bases in synonymous
codons. The sequence/FE relationship can be described with a simple algorithm,
and the total FE can be predicted solely from the sequence composition of the
nucleic acid. The contributions of different synonymous codons to the FE are
additive and one codon cannot replace another. The accumulated contributions of
synonymous codons of an amino acid to the total folding energy of an mRNA is
strongly correlated to the relative amount of that amino acid in the translated
protein.
Conclusion: Synonymous codons are not interchangable with regard to their
role in determining the mRNA FE and the relative amounts of amino acids in the
translated protein, even if they are indistinguishable in respect of amino acid
coding.Comment: 14 pages including 6 figures and 1 tabl
AUG_hairpin: prediction of a downstream secondary structure influencing the recognition of a translation start site
<p>Abstract</p> <p>Background</p> <p>The translation start site plays an important role in the control of translation efficiency of eukaryotic mRNAs. The recognition of the start AUG codon by eukaryotic ribosomes is considered to depend on its nucleotide context. However, the fraction of eukaryotic mRNAs with the start codon in a suboptimal context is relatively large. It may be expected that mRNA should possess some features providing efficient translation, including the proper recognition of a translation start site. It has been experimentally shown that a downstream hairpin located in certain positions with respect to start codon can compensate in part for the suboptimal AUG context and also increases translation from non-AUG initiation codons. Prediction of such a compensatory hairpin may be useful in the evaluation of eukaryotic mRNA translation properties.</p> <p>Results</p> <p>We evaluated interdependency between the start codon context and mRNA secondary structure at the CDS beginning: it was found that a suboptimal start codon context significantly correlated with higher base pairing probabilities at positions 13 β 17 of CDS of human and mouse mRNAs. It is likely that the downstream hairpins are used to enhance translation of some mammalian mRNAs <it>in vivo</it>. Thus, we have developed a tool, <it>AUG_hairpin</it>, to predict local stem-loop structures located within the defined region at the beginning of mRNA coding part. The implemented algorithm is based on the available published experimental data on the CDS-located stem-loop structures influencing the recognition of upstream start codons.</p> <p>Conclusion</p> <p>An occurrence of a potential secondary structure downstream of start AUG codon in a suboptimal context (or downstream of a potential non-AUG start codon) may provide researchers with a testable assumption on the presence of additional regulatory signal influencing mRNA translation initiation rate and the start codon choice. <it>AUG_hairpin</it>, which has a convenient Web-interface with adjustable parameters, will make such an evaluation easy and efficient.</p
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