A class of continua that are not attractors of any IFS

This paper presents a sufficient condition for a continuum in $R^n$ to be embeddable in $R^n$ in such a way that its image is not an attractor of any iterated function system. An example of a continuum in $R^2$ that is not an attractor of any weakly contracting iterated function system is also given

POLSKIE BADANIA NAD POSTACIĄ METROPOLITY ANDRZEJA SZEPTYCKIEGO

Andrei Sheptyts’kyi has been the object of interests of scholars in Poland of both Polish and Ukrainian origin. Polish studies on metropolitan Andrei Sheptyts’kyi have begun form publications of historical sources. Th ey have been prepared by scholars who have performed fi rst analysis of facts connected with his life and activity. Th e most important Polish researches on metropolitan started aft er 1989/1990. Since then a number of monographies concentrating on various aspects of his activity have been prepared. However, a majority of Polish publications on the topic have been single papers each dealing with a particular problem of Sheptyts’kyi’s life and thought. Th ose have rarely been continued by their authors. Further research on metropolitan requires more eff ective cooperation between Polish and Ukrainian historians in order to propose the most complementary picture of Sheptyts’kyi’s personality.Andrei Sheptyts’kyi has been the object of interests of scholars in Poland of both Polish and Ukrainian origin. Polish studies on metropolitan Andrei Sheptyts’kyi have begun form publications of historical sources. Th ey have been prepared by scholars who have performed fi rst analysis of facts connected with his life and activity. Th e most important Polish researches on metropolitan started aft er 1989/1990. Since then a number of monographies concentrating on various aspects of his activity have been prepared. However, a majority of Polish publications on the topic have been single papers each dealing with a particular problem of Sheptyts’kyi’s life and thought. Th ose have rarely been continued by their authors. Further research on metropolitan requires more eff ective cooperation between Polish and Ukrainian historians in order to propose the most complementary picture of Sheptyts’kyi’s personality

Topological classification of scattered IFS-attractors

We study countable compact spaces as potential attractors of iterated function systems. We give an example of a convergent sequence in the real line which is not an IFS-attractor and for each countable ordinal $\delta$ we show that a countable compact space of height $\delta+1$ can be embedded in the real line so that it becomes the attractor of an IFS. On the other hand, we show that a scattered compact metric space of limit height is never an IFS-attractor

Development of Niobium Boron grain retainer for aluminium silicon alloys

This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel UniversityAluminium castings with a large grain structure have poor mechanical properties which are primarily due to casting defects as opposed to fine grain structure. The grain refinement practice using chemical addition is well established for wrought alloys, however in the case of casting alloys, the practice of adding grain refiners and the impact on castability is not well established. The addition of well known Al-5Ti-B grain refiner to casting alloys with silicon (Si) content above 3 wt.% is not effective. This is believed to be due to the chemical reaction between Ti and Si. The current research aim is to find an alternative, but effective, chemical phase which can refine Al-Si alloy grains. Based on a crystallographic database search and intermetallic phases found in Aluminium–Niobium-Boron, there exists several iso-structural phases similar to those of Al3Ti and TiB2. We have selected a phase which exhibits chemical phase stability with Si (below 900 oC) and developed a potential novel grain refiner Nb-B for Al-Si cast alloys. Various Al-Si binary alloys and a commercial sourced LM6 (Al-10Si-Mg) cast alloys were cast after novel grain refiner addition to the melt. It is the first time that such fine grain structures were achieved for Al-Si alloys when Si >4wt.%. It is believed that Nb-B grain refiner enhances the heterogeneous nuclei in the melt. The effectiveness of this grain refiner under various cooling rate conditions is investigated to simulate various practical casting conditions. Due to increased heterogeneous nuclei density, a fine grain structure is also obtained at low cooling rates and the grain size is less sensitive to the cooling rate. The processing of high Si containing alloys for complex shaped castings with reduced defects, fine grain structure and improved mechanical properties are now possible.Isambard Research Scholarships

The Hot Struggle Over the Cold Waters: The Strategic Position of the Arctic Region During and After the Cold War

The Arctic became a hot spot on the global map and discussion over the cold waters became an important issue in international relations. During the Cold War, as it is today, the Arctic was a separate area of rivalry between the superpowers. Despite the fact that today\u27s debate is based on different issues, including sovereignty over the region, potential access to natural resources and the status of international waters, there is still a strong military component to the competing interests, as there was during the Cold War

Samohistorizacija putem fotografije i dokumentiranja. Arhiva Stanisława Ostoje- Kotkowskog u Nacionalnom muzeju u Varšavi

The article is based on the research I carried out on the archive of Stanisław Ostoja-Kotkowski (1922–1994), the Cold War-era Polish-Australian artist living in South Australia, which is currently kept in the National Museum in Warsaw. Ostoja-Kotkowski was a pioneer in electronic art, kinetic sculpture, laser art, computer graphics and light art in the 1960s and 1970s. The article analyzes the archive in the context of “self-historicization” (Badovinac), used by this émigré artist to create his artistic identity in both Australia and Poland. The archive proves that self-documentation by the less-known creators from peripheral hubs is helpful to contemporary researchers in deconstructing dominating historical narratives. The use of photographs in the archive is seen through Amelia Jones’ notion of “performative document”, which helps to see images of ephemeral performances and actions as equal to the works of art themselves.Članak se temelji na istraživanju koje sam provela radeći na arhivi Stanisława Ostoje-Kotkowskog (1922.– 1994.) — poljsko-australskog umjetnika iz doba hladnog rata koji je živio u Južnoj Australiji — koja se trenutačno čuva u Nacionalnom muzeju u Varšavi. Ostoja-Kotkowski bio je pionir elektroničke umjetnosti, kinetičke skulpture, laserske umjetnosti, računalne grafike i svjetlosne umjetnosti 1960-ih i 1970-ih. Članak analizira arhiv u kontekstu „samohistorizacije“ (Badovinac), kojom ovaj umjetnik emigrant stvara svoj umjetnički identitet u Australiji i Poljskoj. Arhiva predstavlja dokaz da samodokumentiranje manje poznatih stvaratelja iz perifernih čvorišta može pomoći suvremenim istraživačima u dekonstrukciji dominantnih povijesnih pripovijesti. Korištenje fotografija u arhivu sagledava se u pojmu „performativnog dokumenta“ Amelie Jones, koji nam pomaže da snimke efemernih izvedbi i radnji vidimo kao jednake samim umjetničkim djelima

Foreign bodies inside us - Trends and knowledge regarding long-acting reversible contraceptives (LARCs) use, factors influencing of contraceptives choice-making process, and the dual-method use among Polish college-aged women

Introduction: The choice-making process of the contraceptive method seems complex and influenced by many factors. Long-acting reversible contraceptives require mechanical interference with the woman's body. For some, it will be an insurmountable barrier whilst for others a chance to enjoy a successful sex life without fear of pregnancy. Recognizing the factors influencing their use will allow us to identify target groups, increase awareness, and spread knowledge about them. Purpose: This study aimed to assess contraceptive use trends and knowledge, focusing on long-acting reversible contraceptives (LARCs) and vaginal rings, also to identify predictors associated with their use and analyze the decision-making process for dual-method use (hormonal plus barrier method) among female college students in Poland. Materials and methods: A self-administered questionnaire including 44 questions in the form of a web-based survey distributed among peers in social media platforms and forums. Results: In the survey a total of 700 female students aged 19±25 took part. All the questions about LARC and vaginal rings were answered correctly by only 19 participants (2.71%). The most knowledgeable were medical students (p<0.0001). Out of 55 LARC and vaginal ring users (7.86%), 47 female students (76.4%,) stated the improvement of their life. Of the methods interfering with the body, the study group most frequently chose the vaginal ring (38.1%) and least frequently the hormone injection (0.1%).  Conclusions: Participants’ knowledge of LARC methods and vaginal rings is insufficient and its main influencing factors are faculty type and frequency of intercourse. LARC and vaginal disc are not the first contraception choice. Fear of pregnancy is the most common factor for dual method use