1,093 research outputs found
On compatibility between isogenies and polarisations of abelian varieties
We discuss the notion of polarised isogenies of abelian varieties, that is,
isogenies which are compatible with given principal polarisations. This is
motivated by problems of unlikely intersections in Shimura varieties. Our aim
is to show that certain questions about polarised isogenies can be reduced to
questions about unpolarised isogenies or vice versa.
Our main theorem concerns abelian varieties B which are isogenous to a fixed
abelian variety A. It establishes the existence of a polarised isogeny A to B
whose degree is polynomially bounded in n, if there exist both an unpolarised
isogeny A to B of degree n and a polarised isogeny A to B of unknown degree. As
a further result, we prove that given any two principally polarised abelian
varieties related by an unpolarised isogeny, there exists a polarised isogeny
between their fourth powers.
The proofs of both theorems involve calculations in the endomorphism algebras
of the abelian varieties, using the Albert classification of these endomorphism
algebras and the classification of Hermitian forms over division algebras
Change in blood glucose level in rats after immobilization
Experiments were carried out on male white rats divided into four groups. In group one the blood glucose level was determined immediately after immobilization. In the other three groups, two hours following immobilization, the blood glucose level was determined every 20 minutes for 3 hours 40 minutes by the glucose oxidase method. Preliminary immobilization for 2 hours removed the increase in the blood glucose caused by the stress reaction. By the 2nd hour of immobilization in the presence of continuing stress, the blood glucose level stabilized and varied within 42 + or - 5.5 and 47 + or - 8.1 mg %. Within 2 hours after the immobilization, the differences in the blood glucose level of the rats from the control groups were statistically insignificant
Introduction of open E-learning system as a factor of regional development
The article analyses the economic and socio-cultural premises for introducing the open e-learning in the Ural region, as well as the potential economic effect of this type of educational activity. The article strives to prove a regular pattern of the universitiesβ transition to e-learning, also in connection with the changes of the educational paradigm and the nature of the educational system management. The hypothesis of the paper is connected with bringing the economic dimension to a humanitarian concept of e-learning, which becomes more and more widespread. The methodology of the article is based on the recognition of the fact that the macroeconomic processes in the information society and the processes occurring in a particular industry β higher education β are of isomorphic nature. On the basis of the analysis of global experience and basic theoretical approaches to e-learning, including the Lifelong Learning concept, the authors make a conclusion of the progressive growth of interest in different countries and regions. The e-learning is treated primarily as a tool to improve quality and efficiency of the educational process. The accuracy of understanding functions and peculiarities of e-learning allows one to determine a positive economic effect of its application for the university, the region, and the employers. The article shows organisational mechanisms and financial model of implementing e-learning in the Ural Federal University. The description is made of the cost options for open-type e-learning course development, investment parameters for their establishment, as well as costs of implementing educational programmes with the application of e-learning. The analysis of the activities of Ural Federal University on implementing e-learning gives the opportunity to further imagine the effect from the introduction of e-learning in other universities in the region. The results of the research may be applied in the institutions of secondary and higher education in the decision concerning the volume and form of the e-learning system
Pricing of construction contract taking into account the of security of object of real estate
The study focuses on the analysis of pricing of construction products in the conditions of tender. The purpose of this article is to establish the cost of the construction of safe buildings. The subject is investment projects in building constriction in the regions of the Russian Federation. The research looks at organizational and economic relations and management processes associated with the formation of the value of investment projects for construction of permanent structures. The article analyzes the instruments used in value management in construction, including the pricing system, contract system and cost engineering. It is revealed that these tools do not ensure the safety of property. A modern approach to the concept of βcost engineeringβ as a tool of cost management, limits its use to the system of pricing of construction products that does not ensure their the safety in the conditions of tendering. The principles of fair price and non-price competition embodied in the current contract system does not solve the problem of the safety of real estate, because there is no limit to the reduction in the price of the contract. The authors reveal the imperfection of the contract system and the operating scheme tenders. The conclusion is that to ensure the safety of real estate it is necessary to consider the concept of βcost engineeringβ in a broader context, that is, to view it as a tool to control not only costs but also the market price and behavior of participants in competitive tenders. The article also analyzes tendering schemes in the West and in Russia. The authors developed a method to influence the behavior of participants in tenders and propose introducing the concept of βcost of securityβ into scientific discourse. The author proposed a system of tenders with the use of value engineering that ensures the safety of real estate throughout its construction and operation.ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΠΎΡΠ²ΡΡΠ΅Π½ΠΎ Π°Π½Π°Π»ΠΈΠ·Ρ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΡΠΎΠΈΠΌΠΎΡΡΠΈ ΡΡΡΠΎΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΠΏΡΠΎΠ΄ΡΠΊΡΠΈΠΈ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΠΏΠΎΠ΄ΡΡΠ΄Π½ΡΡ
ΡΠΎΡΠ³ΠΎΠ². Π¦Π΅Π»Ρ ΡΡΠ°ΡΡΠΈ - ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΡΡΠΎΠΈΠΌΠΎΡΡΠΈ ΡΡΡΠΎΠΈΡΠ΅Π»ΡΡΡΠ²Π° Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΡΡ
ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ² Π½Π΅Π΄Π²ΠΈΠΆΠΈΠΌΠΎΡΡΠΈ. ΠΠ±ΡΠ΅ΠΊΡΠΎΠΌ Π²ΡΡΡΡΠΏΠ°ΡΡ ΠΈΠ½Π²Π΅ΡΡΠΈΡΠΈΠΎΠ½Π½ΡΠ΅ ΠΏΡΠΎΠ΅ΠΊΡΡ ΡΡΡΠΎΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ² Π½Π΅Π΄Π²ΠΈΠΆΠΈΠΌΠΎΡΡΠΈ ΡΡΠ±ΡΠ΅ΠΊΡΠΎΠ² Π ΠΎΡΡΠΈΠΉΡΠΊΠΎΠΉ Π€Π΅Π΄Π΅ΡΠ°ΡΠΈΠΈ. ΠΡΠ΅Π΄ΠΌΠ΅ΡΠΎΠΌ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΠ²Π»ΡΡΡΡΡ ΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΠΎΠ½Π½ΠΎ-ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΠΈ ΡΠΏΡΠ°Π²Π»Π΅Π½ΡΠ΅ΡΠΊΠΈΠ΅ ΠΏΡΠΎΡΠ΅ΡΡΡ, Π²ΠΎΠ·Π½ΠΈΠΊΠ°ΡΡΠΈΠ΅ ΠΏΡΠΈ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ ΡΡΠΎΠΈΠΌΠΎΡΡΠΈ ΠΈΠ½Π²Π΅ΡΡΠΈΡΠΈΠΎΠ½Π½ΡΡ
ΠΏΡΠΎΠ΅ΠΊΡΠΎΠ² ΡΡΡΠΎΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ² Π½Π΅Π΄Π²ΠΈΠΆΠΈΠΌΠΎΡΡΠΈ. Π ΡΡΠ°ΡΡΠ΅ Π°Π½Π°Π»ΠΈΠ·ΠΈΡΡΡΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΠΌΡΠ΅ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΡ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΡΡΠΎΠΈΠΌΠΎΡΡΡΡ Π² ΡΡΡΠΎΠΈΡΠ΅Π»ΡΡΡΠ²Π΅, Π² ΡΠΎΠΌ ΡΠΈΡΠ»Π΅ ΡΠΈΡΡΠ΅ΠΌΠ° ΡΠ΅Π½ΠΎΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ, ΠΊΠΎΠ½ΡΡΠ°ΠΊΡΠ½Π°Ρ ΡΠΈΡΡΠ΅ΠΌΠ° ΠΈ ΡΡΠΎΠΈΠΌΠΎΡΡΠ½ΡΠΉ ΠΈΠ½ΠΆΠΈΠ½ΠΈΡΠΈΠ½Π³. ΠΠΎΠ΄ΠΌΠ΅ΡΠ΅Π½ΠΎ, ΡΡΠΎ ΡΡΠΈ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΡ Π½Π΅ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°ΡΡ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΡ ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ² Π½Π΅Π΄Π²ΠΈΠΆΠΈΠΌΠΎΡΡΠΈ. Π‘ΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠΉ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ ΠΊ ΠΏΠΎΠ½ΡΡΠΈΡ Β«ΡΡΠΎΠΈΠΌΠΎΡΡΠ½ΡΠΉ ΠΈΠ½ΠΆΠΈΠ½ΠΈΡΠΈΠ½Π³Β» ΠΊΠ°ΠΊ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΡ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ Π·Π°ΡΡΠ°ΡΠ°ΠΌΠΈ ΠΏΡΠ΅Π΄ΠΏΠΎΠ»Π°Π³Π°Π΅Ρ Π΅Π³ΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ Π² ΡΠ°ΠΌΠΊΠ°Ρ
ΡΠΈΡΡΠ΅ΠΌΡ ΡΠ΅Π½ΠΎΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ ΡΡΡΠΎΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΠΏΡΠΎΠ΄ΡΠΊΡΠΈΠΈ, ΡΡΠΎ Π½Π΅Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ Π΄Π»Ρ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ Π΅Π΅ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠΈ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΠΏΠΎΠ΄ΡΡΠ΄Π½ΡΡ
ΡΠΎΡΠ³ΠΎΠ². ΠΡΠΈΠ½ΡΠΈΠΏΡ Π΄ΠΎΠ±ΡΠΎΡΠΎΠ²Π΅ΡΡΠ½ΠΎΠΉ ΡΠ΅Π½ΠΎΠ²ΠΎΠΉ ΠΈ Π½Π΅ΡΠ΅Π½ΠΎΠ²ΠΎΠΉ ΠΊΠΎΠ½ΠΊΡΡΠ΅Π½ΡΠΈΠΈ, ΠΈΠ·Π»ΠΎΠΆΠ΅Π½Π½ΡΠ΅ Π² Π΄Π΅ΠΉΡΡΠ²ΡΡΡΠ΅ΠΉ ΠΊΠΎΠ½ΡΡΠ°ΠΊΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΠ΅, ΡΠ°ΠΊΠΆΠ΅ Π½Π΅ ΡΠ΅ΡΠ°ΡΡ ΠΏΡΠΎΠ±Π»Π΅ΠΌΡ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠΈ ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ² Π½Π΅Π΄Π²ΠΈΠΆΠΈΠΌΠΎΡΡΠΈ, ΡΠ°ΠΊ ΠΊΠ°ΠΊ Π½Π΅ ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½ ΠΏΡΠ΅Π΄Π΅Π» ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΡ ΡΠ΅Π½Ρ ΠΊΠΎΠ½ΡΡΠ°ΠΊΡΠ°. ΠΠΌΠ΅ΡΡΠ΅ Ρ ΡΠ΅ΠΌ Π²ΡΡΠ²Π»Π΅Π½ΠΎ Π½Π΅ΡΠΎΠ²Π΅ΡΡΠ΅Π½ΡΡΠ²ΠΎ ΠΊΠΎΠ½ΡΡΠ°ΠΊΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ ΠΈ Π΄Π΅ΠΉΡΡΠ²ΡΡΡΠ΅ΠΉ ΡΡ
Π΅ΠΌΡ ΠΏΠΎΠ΄ΡΡΠ΄Π½ΡΡ
ΡΠΎΡΠ³ΠΎΠ². Π‘Π΄Π΅Π»Π°Π½ Π²ΡΠ²ΠΎΠ΄ ΠΎ ΡΠΎΠΌ, ΡΡΠΎ Π΄Π»Ρ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠΈ ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ² Π½Π΅Π΄Π²ΠΈΠΆΠΈΠΌΠΎΡΡΠΈ ΡΡΠ΅Π±ΡΠ΅ΡΡΡ Π² Π±ΠΎΠ»Π΅Π΅ ΡΠΈΡΠΎΠΊΠΎΠΌ ΡΠΌΡΡΠ»Π΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡ ΠΏΠΎΠ½ΡΡΠΈΠ΅ Β«ΡΡΠΎΠΈΠΌΠΎΡΡΠ½ΡΠΉ ΠΈΠ½ΠΆΠΈΠ½ΠΈΡΠΈΠ½Π³Β», Π½Π΅ ΡΠΎΠ»ΡΠΊΠΎ Π² ΡΠ°ΠΌΠΊΠ°Ρ
ΡΠΈΡΡΠ΅ΠΌΡ ΡΠ΅Π½ΠΎΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ, Π½ΠΎ ΠΈ ΠΏΡΠΈΠΌΠ΅Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎ ΠΊ ΠΊΠΎΠ½ΡΡΠ°ΠΊΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΠ΅. Π’ΠΎ Π΅ΡΡΡ ΡΡΠΎΠΈΠΌΠΎΡΡΠ½ΡΠΉ ΠΈΠ½ΠΆΠΈΠ½ΠΈΡΠΈΠ½Π³ - ΡΡΠΎ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½Ρ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ Π½Π΅ ΡΠΎΠ»ΡΠΊΠΎ Π·Π°ΡΡΠ°ΡΠ°ΠΌΠΈ, Π½ΠΎ ΡΠ°ΠΊΠΆΠ΅ ΡΡΠ½ΠΎΡΠ½ΠΎΠΉ ΡΠ΅Π½ΠΎΠΉ ΠΈ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ΠΌ ΡΡΠ°ΡΡΠ½ΠΈΠΊΠΎΠ² ΠΏΠΎΠ΄ΡΡΠ΄Π½ΡΡ
ΡΠΎΡΠ³ΠΎΠ². ΠΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ ΡΡ
Π΅ΠΌΡ ΠΏΠΎΠ΄ΡΡΠ΄Π½ΡΡ
ΡΠΎΡΠ³ΠΎΠ², Π΄Π΅ΠΉΡΡΠ²ΡΡΡΠΈΠ΅ Π½Π° ΠΠ°ΠΏΠ°Π΄Π΅ ΠΈ Π² Π ΠΎΡΡΠΈΠΈ. ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Π° ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠ° ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ΠΌ ΡΡΠ°ΡΡΠ½ΠΈΠΊΠΎΠ² ΠΏΠΎΠ΄ΡΡΠ΄Π½ΡΡ
ΡΠΎΡΠ³ΠΎΠ². ΠΡΠ³ΡΠΌΠ΅Π½ΡΠΈΡΠΎΠ²Π°Π½Π° Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΡ Π²Π²Π΅Π΄Π΅Π½ΠΈΡ Π² Π½Π°ΡΡΠ½ΡΠΉ ΠΎΠ±ΠΎΡΠΎΡ ΠΏΠΎΠ½ΡΡΠΈΡ Β«ΡΡΠΎΠΈΠΌΠΎΡΡΡ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠΈΒ». ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π° Π°Π²ΡΠΎΡΡΠΊΠ°Ρ ΡΡ
Π΅ΠΌΠ° ΠΏΠΎΠ΄ΡΡΠ΄Π½ΡΡ
ΡΠΎΡΠ³ΠΎΠ² Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΡΠΎΠΈΠΌΠΎΡΡΠ½ΠΎΠ³ΠΎ ΠΈΠ½ΠΆΠΈΠ½ΠΈΡΠΈΠ½Π³Π°, ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°ΡΡΠ°Ρ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΡ ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ² Π½Π΅Π΄Π²ΠΈΠΆΠΈΠΌΠΎΡΡΠΈ Π² ΠΏΡΠΎΡΠ΅ΡΡΠ΅ ΠΈΡ
ΡΡΡΠΎΠΈΡΠ΅Π»ΡΡΡΠ²Π° ΠΈ ΡΠΊΡΠΏΠ»ΡΠ°ΡΠ°ΡΠΈΠΈ
Coulomb driven energy boost of heavy ions for laser plasma acceleration
An unprecedented increase of kinetic energy of laser accelerated heavy ions
is demonstrated. Ultra thin gold foils have been irradiated by an ultra short
laser pulse at an intensity of W/cm. Highly charged
gold ions with kinetic energies up to MeV and a bandwidth limited
energy distribution have been reached by using Joule laser energy on
target. D and D Particle in Cell simulations show how a spatial
dependence on the ions ionization leads to an enhancement of the accelerating
electrical field. Our theoretical model considers a varying charge density
along the target normal and is capable of explaining the energy boost of highly
charged ions, leading to a higher efficiency in laser acceleration of heavy
ions
Multifractal observations of eddies, oil spills and natural slicks in the ocean surface
Natural and man-made distributions of tensioactive substance concentrations in the sea surface features exhibit self-similarity at all radar reflectivity levels when illuminated by SAR. This allows the investigation of the traces produced by vortices and other features in the ocean surface. The man-made oil spills besides often presenting some linear axis of the pollutant concentration produced by moving ships also show their artificial production in the sea surface by the reduced range of scales, which widens as time measured in terms of the local eddy diffusivity distorts the shape of the oil spills. Thanks to this, multifractal analysis of the different
backscattered intensity levels in SAR imagery can be used to distinguish between natural and man-made sea surface features due to their distinct self-similar properties. The differences are detected using the multifractal
box-counting algorithm on different sets of SAR images giving also information on the age of the spills.
Different multifractal algorithms are compared presenting the differences in scaling as a function of some physical generating process such as the locality or the spectral
energy cascade
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