Semiclassical quantization of Rotating Strings in Pilch-Warner geometry

Some of the recent important developments in understanding string/ gauge dualities are based on the idea of highly symmetric motion of ``string solitons'' in $AdS_5\times S^5$ geometry originally suggested by Gubser, Klebanov and Polyakov. In this paper we study symmetric motion of certain string configurations in so called Pilch-Warner geometry. The two-form field $A_2$ breaks down the supersymmetry to $\mathcal{N}=1$ but for the string configurations considered in this paper the classical values of the energy and the spin are the same as for string in $AdS\times S^5$. Although trivial at classical level, the presence of NS-NS antisymmetric field couples the fluctuation modes that indicates changes in the quantum corrections to the energy spectrum. We compare our results with those obtained in the case of pp-wave limit in hep-th/0206045.Comment: 31 pages, no figures, v2 - a few typos correcte

АНАЛИЗ ДИАГРАММЫ НАПРАВЛЕННОСТИ ПРИЕМО-ПЕРЕДАЮЩЕЙ КОЛЬЦЕВОЙ АНТЕННОЙ РЕШЕТКИ С МАЛЫМ УРОВНЕМ БОКОВЫХ ЛЕПЕСТКОВ

Context. A particular advantage of uniform circular arrays is the possibility of scanning the beam within 360° in azimuth withoutdistorting the characteristics of the directivity pattern only by changing the amplitude-phase distribution of the current on its elements.This feature, combined with modern beamforming techniques and digital methods of beamforming opens the prospect of usingcircular arrays in surveillance radars for military and civil purposes instead of antenna systems with mechanical rotation.Objective. Investigation of the possibility of reducing the sidelobe level of a uniform circular transmit-receive array using known amplitude distributions used for linear arrays.Methods. For the study, a phase-mode excitation technique is used in which an arbitrary excitation function of a uniform circular array is represented as a sum of phase excitation components (modes), and the circular array antenna pattern is a superposition of patterns produced by individual phase excitation modes. This technique makes it possible to apply for circular arrays the methods used to pattern synthesis and reduce the side lobe level in linear arrays due to the use of a special transformation matrix.Results. An imitation mathematical model of a discrete uniform circular array has been developed that provides an opportunity to study the efficiency of using amplitude distributions, known for linear arrays, to reduce its side lobe level.Conclusions. The computational experiments have confirmed the possibility of using the phase-mode excitation technique for a pattern synthesis with low sidelobe level in the uniform circular transmits-receive array. A variant of the practical application of the Dolph-Chebyshev amplitude distribution for the synthesis of a circular array pattern is shown.Актуальность. Преимуществом кольцевых антенных решеток является возможность кругового электронного сканирования лучом без искажения характеристик диаграммы направленности за счет изменения распределения тока на ее элементах. Данная особенность, в сочетании с современными технологиями и цифровыми методами диаграммообразования открывает перспективу применения кольцевых антенных решеток в обзорных РЛС военного и гражданского назначения вместо антенных систем с механическим вращением.Цель. Исследование возможностей уменьшения уровня боковых лепестков диаграммы направленности однокольцевой приемо-передающей антенной решетки при использовании известных амплитудных распределений, применяемых для линейных антенных решеток.Метод. Для проведения исследования использован метод фазовых мод, при котором произвольная функция возбуждения кольцевой антенной решетки представляется в виде суммы компонент (мод) фазового возбуждения, а диаграмма на-правленности кольцевой антенной решетки являет собой суперпозицию диаграмм направленности, создаваемых отдельными фазовыми модами возбуждения. Данный метод позволяет применять к кольцевым антенным решеткам методы, используемые для синтеза диаграмм направленности и уменьшения уровня боковых лепестков линейных антенных решеток за счет использования специальной трансформационной матрицы.Результаты. Разработана имитационная математическая модель дискретной однокольцевой антенной решетки, которая обеспечивает возможность исследования эффективности использования амплитудных распределений, известных для линейных антенных решеток, для уменьшения ее уровня боковых лепестков.Выводы. Проведенные вычислительные эксперименты подтвердили возможность применения метода фазовых мод для формирования диаграммы направленности с малым уровнем боковых лепестков в приемо-передающих кольцевых антенныхрешетках. Показан вариант практического применения амплитудного распределения Дольфа-Чебышева для формирования диаграммы направленности кольцевой решетки

Improving outcomes in the treatment of chronic cervicitis

The aim of the study was to improve the results of treatment of chronic cervicitis with the help of the drug benzidamine (rose Tantum) solution for douching.Material and methods – 76 patients of reproductive age with chronic cervicitis were included in the study. The criteria for the effectiveness of treatment were the disappearance of clinical symptoms and normalization of laboratory parameters.Results. Clinical and laboratory efficacy of therapy increased modestly to 86.8%. Insufficient effectiveness or ineffectiveness of the therapy was recorded in 13,2%. The average number of white blood cells was 12 in the field of view, there was an eradication of Gardnerella vaginalis and E. coli. In the whole group, no serious side effects were registered in the assessment of safety and tolerability of the drug.Conclusion. Therapy with a combined preparation of benzidamine (rose Tantum) with a solution for douching, in the treatment of chronic cervicitis has shown its high efficiency

SYNERGY OF BUILDING CYBERSECURITY SYSTEMS

The development of the modern world community is closely related to advances in computing resources and cyberspace. The formation and expansion of the range of services is based on the achievements of mankind in the field of high technologies. However, the rapid growth of computing resources, the emergence of a full-scale quantum computer tightens the requirements for security systems not only for information and communication systems, but also for cyber-physical systems and technologies. The methodological foundations of building security systems for critical infrastructure facilities based on modeling the processes of behavior of antagonistic agents in security systems are discussed in the first chapter. The concept of information security in social networks, based on mathematical models of data protection, taking into account the influence of specific parameters of the social network, the effects on the network are proposed in second chapter. The nonlinear relationships of the parameters of the defense system, attacks, social networks, as well as the influence of individual characteristics of users and the nature of the relationships between them, takes into account. In the third section, practical aspects of the methodology for constructing post-quantum algorithms for asymmetric McEliece and Niederreiter cryptosystems on algebraic codes (elliptic and modified elliptic codes), their mathematical models and practical algorithms are considered. Hybrid crypto-code constructions of McEliece and Niederreiter on defective codes are proposed. They can significantly reduce the energy costs for implementation, while ensuring the required level of cryptographic strength of the system as a whole. The concept of security of corporate information and educational systems based on the construction of an adaptive information security system is proposed

Salicaceae-Feeding Leaf-Mining Insects in Siberia: Distribution, Trophic Specialization, and Pest Status

International audienceThis paper provides an overview of the leaf-mining insect community feeding on willows (Salix spp.) and poplars (Populus spp.) in Siberia. According to published data and our own observations, 50 leaf-mining insect species (i.e., 24 species of Lepidoptera, 15 Coleoptera, 6 Diptera, and 5 Hymenoptera) feed on those two plant genera in Siberia. Using an integrative approach combining field work, morphological and DNA barcoding analyses, we identified 32 leaf-mining insect species from 14 regions across Siberia (i.e. 64% of all leaf-mining species known on Salicaceae in this part of Russia). Among them, 26 species most often found in parks and botanical gardens, represented new faunistic records for several poorly explored regions of Siberia. We have more than doubled the list of Salicaceae-feeding leaf-mining insects in Tomsk oblast, Altai krai, and the Republic of Tuva, and for the first time provided data on leaf-miners for the Khanty-Mansi Autonomous Okrug. The micromoth Phyllocnistis gracilistylella (Gracillariidae), recently described from Japan, was found on a new host plant (Salix caprea) in the south of Krasnoyarsk krai, is new for Russia. Eight leafmining insect species (i.e., five gracillariids: Phyllocnistis labyrinthella, Ph. unipunctella, Phyllonorycter apparella, Ph. sagitella, and Ph. populifoliella; two beetles: Zeugophora scutellaris and Isochnus sequensi; and one sawfly: Heterarthrus ochropoda) can outbreak on poplars, most often in urban plantations, botanical gardens, and plant nurseries in Siberia, and can also affect natural stands. Forty-five species of 50 leaf-mining insects known to feed on willow and poplar in Siberia also occur in Central and Eastern Europe. The remaining five species (Phyllocnistis gracilistylella, Phyllonorycter sibirica, Heterarthrus fasciatus, Tachyerges dauricus, and Isochnus arcticus) are recorded in Asia only. Species richness of the family Gracillariidae, the most diverse on Salicaceae in Siberia, displays 80% similarity to that in the European part of Russia and 71% to the Russian Far East. We discuss the faunal similarity of these regions and highlight the importance of applying an integrative approach combining ecological, morphological analyses, and DNA barcoding to explore and characterize the insect fauna of poorly studied regions of Asian part of Russia