Grain boundaries in vortex matter

We explore the statistical properties of grain boundaries in the vortex polycrystalline phase of type-II superconductors. Treating grain boundaries as arrays of dislocations interacting through linear elasticity, we show that self-interaction of a deformed grain boundary is equivalent to a nonlocal long-range surface tension. This affects the pinning properties of grain boundaries, which are found to be less rough than isolated dislocations. The presence of grain boundaries has an important effect on the transport properties of type-II superconductors as we show by numerical simulations: our results indicate that the critical current is higher for a vortex polycrystal than for a regular vortex lattice. Finally, we discuss the possible role of grain boundaries in vortex lattice melting. Through a phenomenological theory we show that melting can be preceded by an intermediate polycrystalline phase.

Les seus episcopals de Girona i Empúries i les terres del nord-est de Catalunya a les fonts escrites d'època tardoantiga (segles IV-VII)

La present tesi pretèn ser,tal com el seu mateix nom indica, un estudi de totes aquelles informacions que ens proporcionen les fonts escrites d'època tardoantiga (segles IV-VII)i que fan referència, directament o indirecta, a les terres del nord-est de Catalunya.Fou aquesta àrea geogràfica la que, d'ençà el segle IX, i un cop superada la invasió sarraïna que suposà, entre altres coses, la definitiva desaparició de la seu episcopal emporitana, acabà per convertir-se en el futur territori del bisbat de Girona, una demarcació que englovava els antics dominis eclesiàstics i territorials de les seus visigòtiques de Gerunda i Impurias. És una realitat que l'estudi de la tardoantiguitat al nord-est de Catalunya ha experimentat un important impuls en els darrers anys. Es en aquest marc, que la investigació que presentem, pretén ser una aportació a una millor comprensió d'aquest període, amb la sistematització i catalogació de tots aquells textos, la cronologia dels quals abraça el període comprés entre els segles IV-VII, on es fa menció expressa a l'àrea geogràfica que ens ocupa. Aquest estudi s'estructura en set parts clarament diferenciades encara que interdependents entre si, cadascuna de les quals amb una especificitat i una metodologia pròpia. A la primera d'elles (caps.2-3), i a mode d'introducció, es fixen els límits territorials (marc geogràfic) i cronològics (marc històric) de la investigació, elements del tot indispensables i necessaris per a comprendre millor l'escenari on tenen lloc els fets descrits. Un segon gran apartat està enterament dedicat a l'estudi i anàlisi de les principals aportacions realitzades per la historiografia del nostre país en els darrers segles, del XVII fins a l'actualitat, en l'estudi del tema que ens ocupa. En tercer lloc, es passa a analitzar individualment totes i cadascuna de les referències textuals recollides en aquest estudi. L'anàlisi l'hem divididida en cin grans apartats, atenent i respectant la diversa tipologia de les fonts consultades: 1) els itineraria romana; 2) els textos de la patrologia tardoantiga; 3) les actes conciliars; 4) els textos litúrgics; i 5) l'epigrafia. L'estudi de cada text es realitza d'una manera global i sitemàtica, analitzant l'autor, el text i l'època de composició, i tot això en el marc més ampli de la societat del seu temps. Un apartat certament important és enterament dedicat a l'estudi dels orígens i difusió del culte al màrtir Feliu de Girona durant l'antiguitat tardana, a partir sobretot de la informació proporcionada per les fonts escrites i epigràfiques de l'època. El culte al màrtir gironí del segle IV fou, sense cap mena de dubtes, un dels elements característics i definidors en la vida de la Gerunda tardoantiga i, al mateix temps, un signe del gran prestigi assolit per la seu episcopal gironina a la resta d'Hispània durant l'antiguitat tardana. Finalment, i després de presentar, a tall de síntesi, les principals conclusions d'aquesta investigació, un darrer gran apartat ve constituït per un apèndix documental, en el qual s'hi recullen, seguint un criteri cronològic, tots els textos estudiats, transcrits segons les principals edicions crítiques citades. Val a dir, que en aquesta investigació hem utilitzat en la majoria dels casos les millors edicions crítiques de cadascuna de les obres estudiades, un fet que ha permès, en ocasions, corregir antigues transcripcions molt menys acurades i crítiques que s'havien inclòs en moltes de les obres dels darrers dos-cents anys on s'estudiava el període històric que ens ocupa.

Parròquia i societat rural al Bisbat de Girona, segles XIII i XIV

La parròquia, poc valorada per la historiografia medieval, fou una la institució fonamental per a l'ordenació de la societat rural del bisbat de Girona entre els segles X i XIV. Constituïa un territori ben delimitat, els habitants del qual rebien els sagraments eclesiàstics dels clergues que regien l'església i, a través de l'obreria i dels obrers, participaven en la gestió del temple i de la seva economia. La parròquia va incidir directament en l'ordenació del poblament rural a través tant dels nuclis eclesials o "celleres" com dels masos dispersos pel terme d'una parròquia. A més, la parròquia era una important font de rendes: a través de la documentació generada pel bisbe de Girona, el delme era una renda en mans, sobretot, de senyors feudals, cavallers i importants institucions eclesiàstiques; els clergues parroquials només rebien les primícies i altres drets de menor valor. Finalment, la parròquia contribuí enormement a la configuració de les comunitats rurals de bona part del bisbat de Girona.

The unsteady flow of a weakly compressible fluid in a thin porous layer. I: Two-dimensional theory

We consider the problem of determining the pressure and velocity fields for a weakly compressible fluid flowing in a two-dimensional reservoir in an inhomogeneous, anisotropic porous medium, with vertical side walls and variable upper and lower boundaries, in the presence of vertical wells injecting or extracting fluid. Numerical solution of this problem may be expensive, particularly in the case that the depth scale of the layer h is small compared to the horizontal length scale l. This is a situation which occurs frequently in the application to oil reservoir recovery. Under the assumption that epsilon=h/l<<1, we show that the pressure field varies only in the horizontal direction away from the wells (the outer region). We construct two-term asymptotic expansions in epsilon in both the inner (near the wells) and outer regions and use the asymptotic matching principle to derive analytical expressions for all significant process quantities. This approach, via the method of matched asymptotic expansions, takes advantage of the small aspect ratio of the reservoir, epsilon, at precisely the stage where full numerical computations become stiff, and also reveals the detailed structure of the dynamics of the flow, both in the neighborhood of wells and away from wells.

India’s disappearing common lands: fuzzy boundaries, encroachment, and evolving property rights

Opportunistic land encroachment occurs in many low-income countries, gradually yet pervasively, until discrete areas of common land disappear. This paper, motivated by field observations in Karnataka, India, demonstrates that such an evolution of property rights from common to private may be efficient when the boundaries between common and private land are poorly defined, or ‘‘fuzzy.’’ Using a multi-period optimization model, and introducing the concept of stock and flow enforcement, I show how effectiveness of enforcement effort, whether encroachment is reversible, and punitive fines, influence whether an area of common land is fully defined and protected or gradually or rapidly encroached.

Portals to the world: technological extensions to the boundaries of the home

This article examines the ways that technological objects inside the home are viewed and productively used by a group of older people to extend their access to environments beyond the home. Beginning with a discussion of types of domestic object, we highlight appliances and gadgets, and focus our attentions on the latter. The changes in life brought on by ageing, in particular a reduction in mobility, provide the context for our study, in which access to the outside world becomes increasingly difficult. Recognising their changing circumstances led our participants to actively and selectively engage with these objects, mitigating the shrinking of their accessible environment by using them as a gateway to the many virtual worlds now available. We coin the term ‘portal objects’ to describe the potential that this type of technological object provides, and suggest that the investigation of interiors can be enriched by recognising and including the worlds outside that become integral to occupation inside.

Motion of the dayside polar cap boundary during substorm cycles: I. Observations of pulses in the magnetopause reconnection rate

Using data from the EISCAT (European Incoherent Scatter) VHF radar and DMSP (Defense Meteorological Satellite Program) spacecraft passes, we study the motion of the dayside open-closed field line boundary during two substorm cycles. The satellite data show that the motions of ion and electron temperature boundaries in EISCAT data, as reported by Moen et al. (2004), are not localised around the radar; rather, they reflect motions of the open-closed field line boundary at all MLT throughout the dayside auroral ionosphere. The boundary is shown to erode equatorward when the IMF points southward, consistent with the effect of magnetopause reconnection. During the substorm expansion and recovery phases, the dayside boundary returns poleward, whether the IMF points northward or southward. However, the poleward retreat was much faster during the substorm for which the IMF had returned to northward than for the substorm for which the IMF remained southward – even though the former substorm is much the weaker of the two. These poleward retreats are consistent with the destruction of open flux at the tail current sheet. Application of a new analysis of the peak ion energies at the equatorward edge of the cleft/cusp/mantle dispersion seen by the DMSP satellites identifies the dayside reconnection merging gap to extend in MLT from about 9.5 to 15.5 h for most of the interval. Analysis of the boundary motion, and of the convection velocities seen near the boundary by EISCAT, allows calculation of the reconnection rate (mapped down to the ionosphere) from the flow component normal to the boundary in its own rest frame. This reconnection rate is not, in general, significantly different from zero before 06:45 UT (MLT<9.5 h) – indicating that the X line footprint expands over the EISCAT field-of-view to earlier MLT only occasionally and briefly. Between 06:45 UT and 12:45UT (9.5

The dynamics and relationships of precipitation, temperature and convection boundaries in the dayside auroral ionosphere

A continuous band of high ion temperature, which persisted for about 8 h and zigzagged north-south across more than five degrees in latitude in the dayside (07:00– 15:00MLT) auroral ionosphere, was observed by the EISCAT VHF radar on 23 November 1999. Latitudinal gradients in the temperature of the F-region electron and ion gases (Te and Ti , respectively) have been compared with concurrent observations of particle precipitation and field-perpendicular convection by DMSP satellites, in order to reveal a physical explanation for the persistent band of high Ti , and to test the potential role of Ti and Te gradients as possible markers for the open-closed field line boundary. The north/south movement of the equatorward Ti boundary was found to be consistent with the contraction/expansion of the polar cap due to an unbalanced dayside and nightside reconnection. Sporadic intensifications in Ti , recurring on _10-min time scales, indicate that frictional heating was modulated by time-varying reconnection, and the band of high Ti was located on open flux. However, the equatorward Ti boundary was not found to be a close proxy of the open-closed boundary. The closest definable proxy of the open-closed boundary is the magnetosheath electron edge observed by DMSP. Although Te appears to be sensitive to magnetosheath electron fluxes, it is not found to be a suitable parameter for routine tracking of the open-closed boundary, as it involves case dependent analysis of the thermal balance. Finally, we have documented a region of newly-opened sunward convecting flux. This region is situated between the convection reversal boundary and the magnetosheath electron edge defining the openclosed boundary. This is consistent with a delay of several minutes between the arrival of the first (super-Alfv´enic) magnetosheath electrons and the response in the ionospheric convection, conveyed to the ionosphere by the interior Alfv´en wave. It represents a candidate footprint of the low-latitude boundary mixing layer on sunward convecting open flux

Oljudens musik : En revolution i kompositionsteknik?

Noise music is created around sounds not often welcome in a musical context. Since the birth of electronic music in the 1950s a new perspective on composing has emerged. In electronic music, sounds and their timbre are as much important as melody, harmony and rhythm. This composing perspective is not often observed. Therefore I have examined a musical genre that stretches the boundaries of what we consider music, sound, noise, beautiful and terrible. The aim of this thesis is to investigate what aesthetic ideals noise musicians have when they create music. I examine the composing processes of three noise musicians, by asking the following questions: Do you compose in advance or do you improvise, how do your control of sound look like, how do you use the human voice and how do you categorize sound? The thesis is constructed around interviews I have made with the musicians and an extensive historical background concentrated on the alternative composing techniques that has led to the development of noise music. Among the results I found that these noise musicians always improvise with material, but the real essence of noise music is the character of the sounds, not their origins or material. Composing in advance for sound is a lot more difficult than traditional composing. Another result is that these noise musicians have extensive control of their instruments and can produce the sounds they wanted. They point out the importance of instruments that produce sound not directly controlled by themselves, something that create a musical quality that they aspire.

Meningen och innebörden i det goda mötet för vårdgivaren : En fenomenologisk intervjustudie med kvalitativ ansats

The purpose with this qualitative interview-study was to try, from the carer´s point of view, to describe the meaning and the essence of the good meeting. The participants were selectively chosen and were all women of varying life- and professional experience. They were interviewed with four interrogative forms that dealt with the experiences of the meaning and the essence of the good meeting. The analysis of the contents of the four interviews produced five themes: the meaning and the essence of aware presence in the good meeting, the meaning and the essence of the personal alliance, the carer's need of being seen and getting appreciation, the courage to bring up insulting behaviors while still preserving the relationship, personal qualities of the care. Aware presence was to be a main theme through out the meeting. Mutual satisfaction and attention to personal boundaries was emphasized primarily in the personal alliance and trust and confidence was important. It was considered difficult, sharing your personality while still stake out boundaries. The carer also had the need to feel seen and to receive appreciation. The carer as a reward for a work, well done, took positive signals from the person in receipt of care. In close relationships and meetings, the carer sometimes felt insulted by the persons in receipt of care and their relatives. The informants to create the good meeting used personal qualities like courage, sensitivity, flair and common sense.

Öppna arenor och slutna rum : några kommunikationskonsulter i Dalarna ser på opinionsbildning

Syftet med denna uppsats är att ta reda på hur lokala kommunikationskonsulter i Falun/Borlänge-regionen ser på opinionsbildning via professionella konsulter. De centrala begrepp som avhandlas är PR, opinionsbildning och lobbying.Den teoretiska ram som omger undersökningen består av de teoribyggen som skapats av Jürgen Habermas, James E. Grunig och Larsåke Larsson. Habermas ställer sig tveksam till den demokratiska nyttan av professionell opinionsbildning, Grunig är mer positiv och Larsson ser både för- och nackdelar med PR-verksamheten. Larssons undersökning av opinionskonsulter från 2005 refereras också.Undersökningen bygger på intervjuer med ett antal kommunikationskonsulter verksamma i Falun och Borlänge. Den lokala marknaden för opinionsbildande uppdrag diskuteras, men också huruvida politiska uppdrag förser byråerna med politisk färg. Huruvida medarbetarnas engagemang är viktigt och hur hög statusen på opinionsbildande uppdrag är ventileras, samt vilka arbetsmetoder som används. Intervjuerna behandlar också förekomsten av lobbying på lokal nivå. Till slut redogör de intervjuade för sin syn på hur opinionsbildning, PR och lobbying via konsulter påverkar demokratin.Under slutsatser diskuteras resultatet i relation till den teoretiska ramen. Att PR- och reklambranscherna alltmer växer samman och att opinionsbildning är ett vanligt inslag i många projekt är ett faktum som också skymtat fram i den teoretiska ramen. Men reklam- och PR-metoder integreras också i politiken, på gott och ont. Följaktligen växer den gråzon som finns mellan de olika typerna av kommunikation och mellan opinionsbildande och icke-opinionsbildande uppdrag. Det försvårar gränsdragning och tydlighet, men skapar nya kreativa möjligheter.Att den ökade användningen av kommunikationskonsulter kanske kan bidra till en orättvis fördel för resursstarka organisationer diskuteras. Ny teknik, t.ex. Internet, kan dock eventuellt vara den motvikt som gör det möjligt även för resurssvaga grupper att höras i det offentliga samtalet. Kommunikation som maktfaktor tas även upp utifrån termer som lobbying och medias dagordningsfunktion.Några aspekter av den outnyttjade potential som PR har ventileras också. PR som metod är en outnyttjad resurs på det lokala planet, något som kan bero både på okunskap hos de lokala kunderna och ett traditionellt arbetssätt hos byråerna. Utifrån intervjusvaren framkommer att både byråerna, deras kunder och media på landsorten skulle gynnas av ett större samarbete.Resultaten av intervjuerna stöder mycket i den teoretiska ramen, medan somligt förkastas. Som sammanfattning kan sägas att opinionsbildning via konsulter kan användas för både gott och ont. Vilket som blir resultatet handlar som oftast om etik, ansvar, öppenhet och professionalitet.ABSTRACTThe primary target for this report is to find out how communication consultants in the region of Falun and Borlänge views the practice of establishing public opinions by using professional public relations consultants. The concepts in focus are PR, the moulding of public opinion and lobbying.The theoretical framework surrounding this report is the writings by Jürgen Habermas, James E. Grunig and Larsåke Larsson. Habermas has doubts as to the democratic use of professional consultants working with public opinions, Grunig has a somewhat more positive approach and Larsson sees both advantages and disadvantages in a democratic sense with the PR industry. Larssons research concerning consultants working with the moulding of public opinions from 2005 is also reviewed. The research is carried out by interviewing some communication consultants working in the Falun /Borlänge- area. The local market for commissions concerning public opinions is discussed, but also if and how political commissions are forcing a political stamp upon the firms engaging in such commissions. The importance of personal commitment in the consultants and the level of prominence commissions concerning public opinion has in the business is discussed, but also which methods is used and preferred. The interviews also deal with the practice of lobbying in the local arena. Finally the participants state their views on how the moulding of public opinion, PR and lobbying effects the democracy. Conclusively, the result is put in relation to the theories earlier mentioned. The public relations market is merging with the advertising business, that is a fact, and establishing public opinion is a common element in a lot of projects. But methods used for advertising and PR are also integrated in the political sphere, for good and bad. That has made the distinction between different kinds of communication harder, thereby enhancing the difficulties of establishing boundaries and achieving clarity. Yet at the same time it facilitates new creative opportunities.The growing use of communication consultants may contribute to unfair advantages for organisations with large economic resources. New technical development though, such as the Internet for example, may prove to simplify communication for groups with lesser economic power. Communication as an aspect of power is being discussed in terms of lobbying and the agenda setting power of media.Some aspects of the unused potential that lies within PR are also in focus in this report. PR as a method is an unused resource in the local market, which can be due to the local clients lack of knowledge but also to the traditional work carried out by the communication firms. The findings of the interviews show that both communication firms, their clients and the local media would benefit from greater cooperation.The theoretical base in this work is mostly supported by the interviews, though a few of the findings does not agree. The moulding of public opinions by professional consultants can be used for both good and bad. What the result will be is, not surprisingly, a question of ethics, responsibility, openness and professionalism.

Man kan både sitta bredbent och med benen i kors : En kvalitativ studie om hur genusvetare praktiserar genuskunskap

There is an awareness of the importance of gender equality in most western societies, both at the political level and in everyday life. In academia, for instance, gender is nowadays a scientific field which indicates that there is a lot of knowledge about the subject. What we do not have much knowledge about is whether gender knowledge leads to changes in gender relations in practice. The aim of this study is to explore how gender scholars relate to using – practicing – gender knowledge. Key issues in this study are how gender scholars construct gender, how they practice gender theoretical knowledge, and their reflections of gender boundaries.             Theoretically, this study is mainly based on Sara Ahmed’s perspective on gender. The main finding of the study is that despite gender knowledge gender scholars tend to reproduce traditional gender orders. By identifying concepts such as reflected and unreflected masculinity/femininity, different ideals of masculinity/femininity are made visible. There seems to be an ideal among gender scholars to practice their gender knowledge. This ideal is practiced among “gender scholar women” by doing reflected masculinity and reflected femininity. Among “gender scholar men”, however, the ideal to practice gender knowledge by doing unreflected masculinity and reflected femininity seems to be a taboo at the same time. For men, it seems important to mark a distance to a certain type of femininity and to maintain the heterosexual – straight – line. For women, it seems desirable both to distance themselves from a certain type of masculinity and femininity and thereby follow alternative – queer – lines.

Mellan etnologi och modern sociologi : K. Rob. V. Wikman som medlare i Finland och Sverige

Between ethnology and sociology: K. Rob. V. Wikman as a mediator in Finland and Sweden K. Rob. V. Wikman, professor in sociology at the Åbo Akademi University in Turku, Finland, played a central role both within Finnish and Swedish sociology in the 1940s and 1950s. He was a student of Westermarck and thus his own research represented an ethnosociological tradition, which at that time was challenged by modern, American-influenced sociological ideas. The aim of this article is to discuss the adaptation of “modern sociology” and the drawing of boundaries in Nordic sociology after the Second World War by focusing on Wikman’s work in Finnish as well as Swedish sociology, especially the assessor assignments he was given, and by giving emphasis to some of those that served as border poles or border markers in this process. The comparative starting point gives us reason to discuss some nationally characterized similarities and differences that can be observed in the establishment process of modern sociology in Finland and Sweden.

Tillhörighetens gränser : Internationell adoption och ursprungets betydelse i svensk utredningsretorik

Boundaries of belonging: transnational adoption and the significance of origin in Swedish official rhetoric This article explores how the category of ‘transnational adoptees’ in Sweden is constructed in two Official Government Reports (SOU). The article is inspired by poststructuralist perspectives on welfare and social categorization, and draws from a postcolonial and feminist theoretical framework. ‘Transnational adoptees’ as a category is understood as constituted through discourse, and given meaning in different contexts. In the reports, a fundamental importance is attached to the fact that individuals with a background as transnationally adopted have been separated from their birth family and country of birth. It is argued that mental problems and a split identity are consequences to be expected from the separation. (Re)connection to the origin is therefore considered to be crucial for the well-being of the group. The article concludes that this line of reasoning is based on a specific logic of blood and roots, in which ‘transnational adoptees’ are understood as belonging to their countries of birth, rather than Sweden. The logic of blood and roots can be read as a form of racialized othering, but also as a discursive exclusion of ‘transnational adoptees’ from Sweden as an imagined, national community.

”Ni är inte välkomna i vårt fina Malmö” : Premisser för samhällsgemenskap i kamp mot organiserad brottslighet

”You are not welcome in our lovely Malmo”: Conditions for belonging in mobilization against organized crime Several murders occurred in the Swedish city of Malmö between 2011 and 2012. Against this backdrop, the municipality and the police initiate a public campaign. The aim is to mobilize the city’s population against organized crime. In this study the ideology of the initiative is analysed. It is argued that the representation of organized crime as nurtured by the black economy can be read as an example of neoliberal revanchist city agenda, albeit an ambivalent one. The role of groups working in the low-price sphere of the economy becomes that of a threatening projection, while a consumption ideology regulates the boundaries of belonging