Dialectics of the Global and the Local in Contemporary Neo-Identities

Today’s social reality is shaped by controversial yet simultaneous phenomena of globalization and localization - overwhelming unification and interconnectedness in technology, economy, politics and culture that goes together with intensification of striving for recognition by local communities. The trends of constructing and presenting new, generally more fluid and flexible identities are strong and visible in different parts of the world and on various social levels. The aim of this research is to analyse contemporary phenomenon of paradoxical and complex interrelation and dialectics of processes of global unification and localization through study of newly constructed identities, articulations of individuality and uniqueness by certain communities. The new understanding of these creatively-constructed identities is coined into a new term of neo-identity, the title notion of this thesis. Neo-identities are constructed of a peculiar interplay of the global and the local: they emphasize differences and distinctiveness, local in other words, but they also originate to the global processes (global threat or global fashion) and tend to construct themselves in order to find better ways of inclusion into a global societal network, either economic, political or social and ideological. The practical part of the analysis provides illustrative material to the theoretical description of neo-identities. Two unrelated phenomena of South Ossetian national identity construction and emergence of Internet slang that unexpectedly fast spread offline in Russia are turned into case studies of neo-identities.fi=Opinnäytetyö kokotekstinä PDF-muodossa.|en=Thesis fulltext in PDF format.|sv=Lärdomsprov tillgängligt som fulltext i PDF-format

Magnetic fields in ring galaxies

Many galaxies contain magnetic fields supported by galactic dynamo action. However, nothing definitive is known about magnetic fields in ring galaxies. Here we investigate large-scale magnetic fields in a previously unexplored context, namely ring galaxies, and concentrate our efforts on the structures that appear most promising for galactic dynamo action, i.e. outer star-forming rings in visually unbarred galaxies. We use tested methods for modelling $\alpha-\Omega$ galactic dynamos, taking into account the available observational information concerning ionized interstellar matter in ring galaxies. Our main result is that dynamo drivers in ring galaxies are strong enough to excite large-scale magnetic fields in the ring galaxies studied. The variety of dynamo driven magnetic configurations in ring galaxies obtained in our modelling is much richer than that found in classical spiral galaxies. In particular, various long-lived transients are possible. An especially interesting case is that of NGC 4513 where the ring counter-rotates with respect to the disc. Strong shear in the region between the disc and the ring is associated with unusually strong dynamo drivers for the counter-rotators. The effect of the strong drivers is found to be unexpectedly moderate. With counter-rotation in the disc, a generic model shows that a steady mixed parity magnetic configuration, unknown for classical spiral galaxies, may be excited, although we do not specifically model NGC 4513. We deduce that ring galaxies constitute a morphological class of galaxies in which identification of large-scale magnetic fields from observations of polarized radio emission, as well as dynamo modelling, may be possible. Such studies have the potential to throw additional light on the physical nature of rings, their lifetimes and evolution.Comment: 25 pages, 12 figure

Energy-optimal steering of transitions through a fractal basin boundary.

We study fluctuational transitions in a discrete dy- namical system having two co-existing attractors in phase space, separated by a fractal basin boundary. It is shown that transitions occur via a unique ac- cessible point on the boundary. The complicated structure of the paths inside the fractal boundary is determined by a hierarchy of homoclinic original sad- dles. By exploiting an analogy between the control problem and the concept of an optimal fluctuational path, we identify the optimal deterministic control function as being equivalent to the optimal fluctu- ational force obtained from a numerical analysis of the fluctuational transitions between two states

Хеджування ризиків в опціонній торгівлі

У тезах представлено формування стратегії хеджування ризиків опціонної торгівлі на базі моделі Блека-Шоулз

Динамічна стратегія хеджування ризиків опціонної торгівлі

У статті пропонується корекція відомої моделі визначення справедливої ціни опціону Блека-Шоулза, яка враховує операційні витрати

Математичні методи у хеджуванні ризиків на ринку опціонів

У статті проаналізовані методи, які використовуються для прогнозування цін опціонів, у тому числі деякі модифікації моделі Блека-Шоулза, та запропоновано технологію знаходження аналітичного розв’язку

Chinese volunteers in the Civil War in Ural

Статья посвящена участию китайских добровольцев в Гражданской войне на Урале (1918). Рассмотрены история создания китайских формирований, их численность и состав. Особое внимание уделено биографии командира полка Жэнь Фучена. Дано описание боевого пути китайских частей. Подробно описано участие китайского полка в сражении за Верхотурье и станцию Выя. Анализируется вклад китайских добровольцев в общий ход Гражданской войны на Урале.The article is devoted to the participation of Chinese volunteers in the Civil War in Ural (1918). The history of the creation of the Chinese groups, their number and composition. Particular attention is paid to the biography of the regimental commander Ren Fucheng. The article contains a description of the military way of Chinese parts. Detailed part of the Chinese Regiment in the battle for Verkhoturye and Art. The paper also analyzes the contribution of Chinese volunteers in the general course of the civil war in Ural