Romanian street beggars in Stockholm. A conflict between global city aspirations and informal livelihoods.

This thesis is looking into the issue of Romanian street beggars in Stockholm, Sweden. In the last couple of years there was an increase in the number of beggars in the Swedish capital, while most of them seem to come from Romania. This lead quickly to a national debate. The aim of the paper is to shed some light on this issue and see why it is a problem and for whom, looking at three main stakeholders: the state, the activists and the beggars. The theoretical framework for this project is mainly based on the concept of the conflict of rationalities, with Stockholm as an aspiring global city and those which are begging as livelihood strategy. The data is collected mainly through semi-structured interviews, informal interviews and personal observations. Also, the literature review provides context and brings similar examples for a better grasp of the situation in Sweden. The results show that Stockholm sends a branded image of itself to the world, while the new type of migrant is in conflict with this view. The activists try to make the life better for the beggars which are virtually not doing anything illegal. The Swedish state opened discussions with the Romanian state, but did nothing to integrate the newcomers. In this case, the beggars share similar experience in the city.

Zr-Laponite pillared clay-based nickel catalysts for methane reforming with carbon dioxide

Zr-Laponite pillared clays were prepared and used as supports of nickel catalysts for the methane reforming reaction with carbon dioxide to synthesis gas. The structural and textural characteristics of supports and catalysts were systematically examined by N-2 adsorption/desorption and X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron spectroscopy (TEM) techniques. The catalytic performance and carbon deposition were investigated. It is found that Zr-Laponite pillared clays are promising catalyst supports for carbon dioxide reforming of methane. The pore structure and surface properties of such supports greatly affect the catalytic behaviors of catalysts derived. Carbon deposition on catalysts was also affected by the property and structure of supports. The sintering of nickel metal and zirconia was another factor responsible for catalyst deactivation. This new-type nickel supported catalyst Ni/Zr-Laponite(8), with well-developed porosity, gave a higher initial conversion and a relatively long-term stability, and is therefore a promising catalyst for potential application to carbon dioxide reforming of methane to synthesis gas. (C) 2002 Elsevier Science B.V All rights reserved.

Galaxy threshing and ultra-compact dwarfs in the Fornax cluster

We have discovered a new type of galaxy in the Fornax Cluster: 'ultra-compact' dwarfs (UCDs). The UCDs are unresolved in ground-based imaging and have spectra typical of old stellar systems. Although the UCDs resemble overgrown globular clusters, based on VLT UVES echelle spectroscopy, they appear to be dynamically distinct systems with higher internal velocity dispersions and M/L ratios for a given luminosity than Milky Way or M31 globulars. Our preferred explanation for their origin is that they are the remnant nuclei of dwarf elliptical galaxies which have been tidally stripped, or 'threshed' by repeated encounters with the central cluster galaxy, NGC1399. If correct, then tidal stripping of nucleated dwarfs to form UCDs may, over a Hubble time, be an important source of the plentiful globular cluster population in the halo of NGC1399, and, by implication, other cD galaxies. In this picture, the dwarf elliptical halo contents, up to 99% of the original dwarf luminosity, contribute a significant fraction of the populations of intergalactic stars, globulars, and gas in galaxy clusters.

Quantum doubles from a class of noncocommutative weak Hopf algebras

The concept of biperfect (noncocommutative) weak Hopf algebras is introduced and their properties are discussed. A new type of quasi-bicrossed products is constructed by means of weak Hopf skew-pairs of the weak Hopf algebras which are generalizations of the Hopf pairs introduced by Takeuchi. As a special case, the quantum double of a finite dimensional biperfect (noncocommutative) weak Hopf algebra is built. Examples of quantum doubles from a Clifford monoid as well as a noncommutative and noncocommutative weak Hopf algebra are given, generalizing quantum doubles from a group and a noncommutative and noncocommutative Hopf algebra, respectively. Moreover, some characterizations of quantum doubles of finite dimensional biperfect weak Hopf algebras are obtained. (C) 2004 American Institute of Physics.

Adolescence: A useful concept for this millennium

‘Adolescence’ has become increasingly recognised as a nebulous concept. Previous conceptualisations of adolescence have adopted a ‘deficit’ view, regarding teenagers as ‘unfinished’ adults. The deficit view of adolescence is highly problematic in an era where adulthood itself is difficult to define. The terms ‘kidult’ or ‘adultescent’ have emerged to describe adult-age people whose interests and priorities match those of their teenage counterparts. Rather than relying on ‘lock-step’ models of physical, cognitive and social growth put forward by developmental psychology, adolescence can be more usefully defined by looking at the common experiences of people in their teenage years. Common experiences arise at an institutional level; for example, all adolescents are treated as the same by legal and education systems. The transition from primary to secondary schooling is a milestone for all children, exposing them to a new type of educational environment. Shared experiences also arise from generational factors. Today’s adolescents belong to the millennial generation, characterised by technological competence, global perspectives, high susceptibility to media influence, individualisation and rapid interactions. This generation focuses on teamwork, achievement, modesty and good conduct, and has great potential for significant collective accomplishments. These generational factors challenge educators to provide relevant learning experiences for today’s students. Many classrooms still utilise textbook-based pedagogy more suited to previous generations, resulting in disengagement among millennial students. Curriculum content must also be tailored to generational needs. The rapid pace of change, as well as the fluidity of identity created by dissolving geographical and vocational boundaries, mean that the millennial generation will need more than a fixed set of skills and knowledge to enter adulthood. Teachers must enable their students to think like ‘expert novices’, adept at assimilating new concepts in depth and prepared to engage in lifelong learning.

Finding temporal features of event-oriented patterns

A major task of traditional temporal event sequence mining is to predict the occurrences of a special type of event (called target event) in a long temporal sequence. Our previous work has defined a new type of pattern, called event-oriented pattern, which can potentially predict the target event within a certain period of time. However, in the event-oriented pattern discovery, because the size of interval for prediction is pre-defined, the mining results could be inaccurate and carry misleading information. In this paper, we introduce a new concept, called temporal feature, to rectify this shortcoming. Generally, for any event-oriented pattern discovered under the pre-given size of interval, the temporal feature is the minimal size of interval that makes the pattern interesting. Thus, by further investigating the temporal features of discovered event-oriented patterns, we can refine the knowledge for the target event prediction.

Experiments with Bose-Einstein condensates on an atom chip

We describe the production of BECs on a new type of atom chip based on silver foil. Our atom chip is fabricated with thick wires capable of carrying currents of several amperes without overheating. The silver surface is highly reflective to light resonant with optical transitions used for Rb. The pattern on the chip consists of two parallel Z-trap wires, capable of producing two-wire guide, and two additional endcap wires for varying the axial confinement. Condensates are produced in magnetic microtraps formed within 1 mm of surface of the chip. We have observed the fragmentation of cold atom clouds when brought close to the chip surface. This results from a perturbed trapping potential caused by nanometer deviations of the current path through the wires on the chip. We present results of fragmentation of cold clouds at distances below 100 µm from the wires and investigate the origin of the deviating current. The fragmentation has different characteristics to those seen with copper conductors. The dynamics of atoms in these microtraps is also investigated. ©2005 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

A profissão de pastor presbiteriano na cidade de São Paulo

A pesquisa realizada entre pastores pertencentes à Igreja Presbiteriana do Brasil (IPB) na cidade de São Paulo mostra que o pastor presbiteriano perdeu o privilegiado status de que gozava até o final da primeira metade do século XX. Longe se vão os dias em que o pastor era um profissional cuja ocupação era respeitada e valorizada e a carreira pastoral era vista como um caminho seguro para a ascensão social de muitos jovens, especialmente os oriundos de cidades pequenas e do mundo rural. Principalmente após os anos 50, mudanças de várias ordens ocorreram, alterando a antiga situação. O processo de secula rização e a conseqüente desvalorização das instituições religiosas tradicionais afetaram diretamente o pastor presbiteriano. Desde então, ganhou força a indagação: Para que serve o pastor? Por sua vez, o campo religioso brasileiro, particularmente nos últimos 25 anos do século XX, assistiu à irrupção de novos movimentos religiosos, aumentando então a competitividade. Surgiram, por exemplo, movimentos e igrejas neopentecostais lideradas por um novo tipo de pastor, que age conforme outros scripts, assumindo papéis mais adequados às regras de uma sociedade midiática. Nesse novo contexto, o pastor presbiteriano reagiu com perplexidade e foi buscar formas de recuperar o prestígio perdido. Um dos caminhos encontrados foi a profissionalização do papel de pastor, que assim se tornou um especialista em assistência social, ensino ou aconselhamento, estratégia aliás bastante valorizada na sociedade contemporânea. Entretanto, teológica e ideologicamente, esse especialista religioso continua se legitimando como um pastor ortodoxo e conservador, já que esse é o papel a ele atribuído na organização religiosa à qual pertence, a condição sine qua non para que ele siga desenvolvendo a sua carreira como pastor da IPB.

PROCESSOS COMUNICACIONAIS NAS RÁDIOS COMUNITÁRIAS DO SERTÃO DO NORDESTE BRASILEIRO NA INTERNET

A tese aborda os processos comunicacionais nas rádios comunitárias do Sertão do Nordeste do Brasil que estão na Internet. Objetiva-se entender teórica e empiricamente como ocorrem esses processos nestas emissoras e explorar suas especificidades; compreender as estruturas, programações, equipes, financiamentos e históricos de inserção digital; entender os processos de estímulo, emissão e interação, em termos de cidadania; compreender como se dão as novas vozes, territoriais e na Internet; entender como se dá a participação do usuário (internauta); e listar as rádios comunitárias ou que se assumem comunitárias sertanejas, entendendo suas peculiaridades de programação, diferencial em termos de emissão territorial e não territorial (via Internet). A metodologia empregada consiste em pesquisa bibliográfica e documental, em mapeamento prévio das emissoras, bem como de pesquisa de campo por meio visitas in loco e de entrevistas semiestruturadas para entender-se as emissoras nos oito Estados sertanejos nordestinos (Alagoas, Bahia, Ceará, Paraíba, Pernambuco, Piauí, Rio Grande do Norte e Sergipe). Acompanhou-se também o trabalho das emissoras na Internet, tanto em seus sites quanto a presença em redes sociais. Constata-se, com base em parâmetros teóricos, a existência de três tipos de emissoras de rádio comunitária na Internet: as off-line (que apenas têm espaço na Internet, mas não há transmissão simultânea), as online institucionais (que apenas transmitem simultaneamente a programação no dial) e as online dinâmicas (que têm conteúdo diferencial da emissora no dial e promovem interação e interatividade). O fato de estar na Internet faz com que as emissoras de rádio comunitária sertanejas aumentem sua capacidade de promover a participação, a interação e a interatividade, pois ocorre a retroalimentação da comunicação comunitária radiofônica com um novo tipo movido pela desterritorialização, que é o maior desafio dessas emissoras em lugares de baixo poder aquisitivo e comunicacional onde a presença do coronelismo eletrônico ainda persiste.

Design and fabrication of fibre Bragg gratings with V-shaped dispersion profile for multi-channel signal processing

We have designed and fabricated a new type of fibre Bragg grating (FBG) with a V-shaped dispersion profile for multi-channel dispersion compensation in communication links.

Design and fabrication of fiber Bragg gratings with V-shaped dispersion profile

We propose a new type of fiber Bragg grating (FBG) with a V-shaped dispersion profile. We demonstrate that such V-shaped FBGs bring advantages in manipulation of optical signals compared to conventional FBGs with a constant dispersion, e.g., they can produce larger chirp for the same input pulsewidth and/or can be used as pulse shapers. Application of the proposed V-shaped FBGs for signal prechirping in fiber transmission is examined. The proposed design of the V-shaped FBG can be easily extended to embrace multichannel devices.

Resource-definition policies for autonomic computing

The paper introduces a framework for the formal specification of autonomic computing policies, and uses it to define a new type of autonomic computing policy termed a resource-definition policy. We describe the semantics of resource-definition policies, explain how they can be used as a basis for the development of autonomic system of systems, and present a sample data-centre application built using the new policy type.

Run-time connector synthesis for autonomic systems of systems

A key objective of autonomic computing is to reduce the cost and expertise required for the management of complex IT systems. As a growing number of these systems are implemented as hierarchies or federations of lower-level systems, techniques that support the development of autonomic systems of systems are required. This article introduces one such technique, which involves the run-time synthesis of autonomic system connectors. These connectors are specified by means of a new type of autonomic computing policy termed a resource definition policy, and enable the dynamic realisation of collections of collaborating autonomic systems, as envisaged by the original vision of autonomic computing. We propose a framework for the formal specification of autonomic computing policies, and use it to define the new policy type and to describe its application to the development of autonomic system of systems. To validate the approach, we present a sample data-centre application that was built using connectors synthesised from resource-definition policies.

Radial-field magnetic electron lenses

This investigation looks critically at conventional magnetic lenses in the light of present-day technology with the aim of advancing electron microscopy in its broadest sense. By optimising the cooling arrangements and heat transfer characteristics of lens windings it was possible to increase substantially the current density in the winding, and achieve a large reduction in the size of conventional magnetic electron lenses. Following investigations into the properties of solenoidal lenses, a new type of lens with only one pole-piece was developed. The focal properties of such lenses, which differ considerably from those.of conventional lenses, have been derived from a combination of mathematical models and experimentally measured axial flux density distributions. These properties can be profitably discussed with reference to "half-lenses". Miniature conventional twin pole-piece lenses and the proposed radial field single pole-piece lenses have been designed and constructed and both types of lenses have been evaluated by constructing miniature electron optical columns. A miniature experimental transmission electron microscope (TEM), a miniature scanning electron microscope (SEM) and a scanning transmission microscope (STEM) have been built. A single pole-piece miniature one million volt projector lens of only lOcm diameter and weighing 2.lkg was designed, built and tested at 1 million volts in a commercial electron microscope. iii. Preliminary experiments indicate that in single pole lenses it is possible to extract secondary electrons from the specimen in spite of the presence of the magnetic field of the probe-forming lens. This may well be relevant for the SEM in which it is desirable to examine a large specimen at a moderately good resolution.

A psychological investigation into the relationship between hemispheric functioning and specific written language difficulties (dyslexia), using pharmaceutical intervention techniques

This thesis attempts a psychological investigation of hemispheric functioning in developmental dyslexia. Previous work using neuropsychological methods with developmental dyslexics is reviewed ,and original work is presented both of a conventional psychometric nature and also utilising a new means of intervention. At the inception of inquiry into dyslexia, comparisons were drawn between developmental dyslexia and acquired alexia, promoting a model of brain damage as the common cause. Subsequent investigators found developmental dyslexics to be neurologically intact, and so an alternative hypothesis was offered, namely that language is abnormally localized (not in the left hemisphere). Research in the last decade, using the advanced techniques of modern neuropsychology, has indicated that developmental dyslexics are probably left hemisphere dominant for language. The development of a new type of pharmaceutical prep~ration (that appears to have a left hemisphere effect) offers an oppertunity to test the experimental hypothesis. This hypothesis propounds that most dyslexics are left hemisphere language dominant, but some of these language related operations are dysfunctioning. The methods utilised are those of psychological assessment of cognitive function, both in a traditional psychometric situation, and with a new form of intervention (Piracetam). The information resulting from intervention will be judged on its therapeutic validity and contribution to the understanding of hemispheric functioning in dyslexics. The experimental studies using conventional psychometric evaluation revealed a dyslexic profile of poor sequencing and name coding ability, with adequate spatial and verbal reasoning skills. Neuropsychological information would tend to suggest that this profile was indicative of adequate right hemsiphere abilities and deficits in some left hemsiphere abilities. When an intervention agent (Piracetam) was used with young adult dyslexics there were improvements in both the rate of acquisition and conservation of verbal learning. An experimental study with dyslexic children revealed that Piracetam appeared to improve reading, writing and sequencing, but did not influence spatial abilities. This would seem to concord with other recent findings, that deve~mental dyslexics may have left hemisphere language localisation, although some of these language related abilities are dysfunctioning.