Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal

When it comes to comprehension of complex phenomena, humans need to understand what interactions lie within them.These interactions are often captured with complex networks. However, the interaction pluralism is often shallowed by traditional network models. We propose a new way to look at these phenomena through the lens of multiplex networks, in which catalysts are drivers of the interaction through substrates. To study the entanglement of a multiplex network is to study how edges intertwine, in other words, how catalysts interact. Our entanglement analysis results in a full set of new objects which completes traditional network approaches: the entanglement homogeneity and intensity of the multiplex network, and the catalyst interaction network, with for each catalyst, an entanglement index. These objects are very suitable for embedment in a visual analytics framework, to enable comprehension of a complex structure. We thus propose of visual setting with coordinated multiple views. We take advantage of mental mapping and visual linking to present simultaneous information of a multiplex network at three different levels of abstraction. We complete brushing and linking with a leapfrog interaction that mimics the back-and-forth process involved in users' comprehension. The method is validated and enriched through multiple applications including assessing group cohesion in document collections, and identification of particular associations in social networks.

The present study group consists of 45 women with genuine stress incontinence who were selected for surgical treatment and randomized either to retropubic urethrocystopexy (n=30) or pubococcygeal repair (n=15). The preoperative assessment included medical history, gynecological examination, urine analysis and culture, residual urine, pad test, frequency-continence charts, water urethrocystoscopy, continence test and cystometry with analysis of micturition. Moreover, five semistructured interviews were performed with the women and two with their partner. The following questionnaires were used measuring a) personality characteristics: Karolinska Scales of Personality (KSP), Eysenck Personality Inventory (EPI), b) depression: Beck Depression Inventory (BDI) and c) social support: Interview Schedule for Social Interaction (ISSI). The results have shown that there was no difference in the subjective cure rate between the two surgical methods (73% vs. 80 % respectively). The bladder volume had increased in both groups and the intravesical pressure of the bladder filled to maximum had increased in the pubococcygeal repair group. Other urodynamic variables were unchanged by the operation. Pad tests have demonstrated that 67 % of the women in the urethrocystopexy group and 47 % in the pubococcygeal repair group ceased to leak urine. Postoperatively, 63 % of the women in the urethrocystopexy group needed high doses of analgesics compared with only 33 % in the pubococcygeal repair group. Among the women experiencing severe to very severe pain dysphoric subjects were overrepresented. Postoperative residual urine was a minor nursing problem in both groups. Women with SUI of long duration scored significantly higher than controls on the KSP scales of somatic anxiety, psychic anxiety, psychasthenia, suspicion and on the EPI lie-scale. There was no significant difference in sexual activity before and after surgery. One or two sexual dysfunctions within the desire, excitement, orgasmic and resolution phase were reported by the majority of women both before and after surgical intervention. The cured women reported a higher level of overall activities before surgery than the improved (i.e. not cured) women, whereas post surgery both the cured and the improved women obtained about the same level of activities. Regarding social support, no differences between the cured or improved women occured as concerns attachment. The cured women showed a higher degree of adequacy of social integration compared with the improved women. In order to delineate predictive factors for the surgical outcome the following variables were investigated: age of patient, duration of urine leakage, parity, personality, psychological and social factors. The following predictors of the outcome of surgical treatment emerged: duration of stress incontinence, neuroticism and age of patient. The results of the present study indicate the ecessity of a multidisciplinary approach to the treatment and nursing of women with SUI. / <p>Diss. (sammanfattning) Umeå : Umeå universitet, 1995</p> / digitalisering@umu

The purpose of this study is to demonstrate a practical application of social network analysis in the field of education using a large-scale data source. Using the Early Childhood Longitudinal Base Year data, a network is identified by examining the connections that occur between supports, both inside and outside formal special education resources for kindergarteners with access to special education programs. Social network mappings and quantitative findings are presented for formal and informal supports and primary disability category, along with policy implications and suggestions for further research. Findings indicate that social network analysis offers a unique and innovative perspective to educational research.

Both stroke and depression are major health problems in the elderly. In this study, the prevalence of major depression after stroke was investigated in a well-defined sample of acute stroke patients (n=80), followed up at 3 months, 1 year, 2 and 3 years after the stroke event. Links to biological and psychosocial factors were examined. Hypercortisolism was studied by the dexamethasone suppression test and compared with healthy elderly. Living conditions (including demographic caracteristics, economic resources, health, functional ability, activity/leisure, social network) and life satisfaction were described before and after stroke in relation to a general elderly population. Demographic caracteristics, economic resources, social network and psychiatric morbidity prestroke did not differ from the general elderly population. Already prior to the stroke, patients reported more health problems and lower functional ability in many aspects of daily life, more passive leisure time and a lower global life satisfaction. After stroke, contacts with children were maintained, whilst contacts outside the family declined and remained lower than in the general elderly population. Stroke involved a marked reduction in global life satisfaction. Poor life satisfaction at 1 year remained poor for the entire three years; these stroke victims had a higher frequency of major depression early after stroke. The prevalence of major depression was 25% at the acute stage, 31% at 3 months, decreased to 16% at 1 year, was 19% at 2 years and increased to 29% at 3 years. The most important predictors of immediate major depression were left anterior brain lesion, dysphasia, and living alone. Dependence in self-care ability and loss of social contacts outside the family were the most important predictors at 3 months. From 1 year onwards, loss of social contacts contributed most to depression and at 3 years also cerebral atrophy. Sixty percent of patients with early depression (0-3 months) had recovered at 1 year; those not recovered at 1 year had a high risk of chronicitation. Hypercortisolism as measured by the dexamethasone suppression test was associated with major depression late (3 years) but not early (0-3 months) after stroke. At 3 years, the dexamethasone suppression test had a sensitivity of 70%, a specificity of 97%, a positive predictive value of 88%, a negative predicitive value of 91%, and a diagnostic accuracy of 90%. Nonsuppression of dexamethasone at 3 months was a significant predictor of major depression at 3 years. / <p>Härtill 5 uppsatser</p> / digitalisering@umu

Individual shortcomings and the need for resources stimulates organizations desire to establish collaborative relations with each other. An organization tends to prefer to collaborate with other familiar organizations. The information available to an organization about its peers is necessary for its ability to appreciate the suitability of potential partners as well as their capabilities and ability to contribute to a successful collaborative relation. In a three stage analytical process, social network analysis and statistical network modelling is applied to investigate the correlation between patterns of communication and the extent to which organizations establish collaborative relationships. With a theoretical framework of resource dependence theory and social capital, data on information exchanges, resource exchanges and common advocacy among humanitarian 55 organizations is mapped. The first analytical stage explicates the structures of the collected information exchanges and evaluates the prevalence of coordination facilitating communication structures. The second stage appreciates the extent of inter-organizational involvement in collaborative relationships. The third step combines these results to demonstrate the covariance between the prevalence of coordination facilitating structures and extent of collaborative relations. The results indicate that the collected information exchanges exhibit few coordination facilitating structures and the organizations are only to a very limited extent engaged in collaborative relationships with each other. While consistent with previous research on the importance of communication for coordination, these observations illustrate the negative consequences of lacking communication. This analysis contributes with added empirical experiences to solidify our understanding of organizational behavior in inter-organizational interaction and tendencies to establish collaborative relations.

Avhandlingen består av tre empiriska studier som undersöker effekten av socialt kapital för individernas arbetsmarknadsutfall, utifrån två huvudsakliga frågeställningar. För det första: Vilka individuella egenskaper, såsom utbildningsnivå, genus och ursprungsland, underlättar eller försvårar tillgång till socialt kapital? Här studeras den avkastning som socialt kapital genererar på arbetsmarknaden, jämfört med utbildning och arbetslivserfarenhet. För det andra analyseras vilken betydelse en stigmatiserad social identitet hos vissa invandrade har för tillgången till socialt kapital och i vilken grad ett ”underskott” av socialt kapital påverkar deras arbetsmarknadsutfall. Resultatet av de empiriska undersökningarna tyder på att invandrare och deras barn, efter kontroll för produktionsrelaterade variabler, har mindre tillgång till socialt kapital och därför sämre arbetsmarknadsutfall. / This thesis consists of an introduction and three self-contained studies on the impact of social capital on individuals’ labour market outcomes. It focuses on labour market conditions for immigrants and their children in Sweden. The central research questions of the thesis are twofold. First, what individual characteristics, such as educational level, gender and country of origin, enhance or hinder access to social capital, and how well is social capital rewarded in the labour market compared with education and work experience? Second, does the stigmatized social identity of some immigrant groups affect their access to social capital, and to what degree does such a social capital ‘deficit’ affect their labour market outcomes? The results demonstrate that inequality between immigrants (and their children) and natives (and their children) in access to networks with valuable resources of social capital is an important issue in their labour market outcomes.

This thesis deals with questions concerning spatial agglomeration of economic activities. The object of study is the Internet industry in central Stockholm. Through the use of statistical data and an interview study the Internet industry is described, measured, and analyzed through theories concerning agglomerations, social network relations, and knowledge and information flows. These theories are interpreted through five agglomeration themes related to the role of customers, subcontractors and partners, competitors, financing, and labour market, respec-tively. The research has recognized the importance of proximity to create and maintain social networks, and to spread information and knowledge, especially tacit knowledge. The thesis also shows how social networks, and information and knowledge flows have an essential role in all the five agglomeration themes that are analyzed. The results of this analysis show that the proximity to customers is the most important factor for the location of the Internet indus-try. Also, the local labour market and access to suppliers and partners are important factors. Competitors and rivals have a role to play when it comes to the diffusion of knowledge and information, although its importance as a location factor is hard to estimate. The analysis of the firms’ financing demonstrate that this factor hardly has been of crucial importance for the location of the Internet industry, but access to (venture) capital might have been of indirect importance for the location and the pace of the development of the Internet industry.

Hensikten med denne studien var å søke kunnskap om brukerne ved dagsenter i Norge, og hvilken betydning det hadde for deres hverdag at dette tilbudet eksisterte. Dybdeintervju med ni brukere av dagsenter ble foretatt. I innsamling og analyse av data ble Grounded Theory brukt. En kjernekategori kom frem: Gjennom aktivitet og sosial kontakt med andre motvirkes opplevelsen av sosiale savn og depresjoner. Funnene viste at det var mye ensomhet og isolasjon blant informantene. Dagsenter-tilbud to-tre ganger i uken ga dem mulighet for et sosialt nettverk og sosial aktivitet. Dette førte til at de følte seg friskere og ved bedre helse. De viktigste funnene var at dagsentrene representerte fellesskap med andre eldre, aktivitet, trivsel ,og omsorg. / The aim of this study was to gain more insight about the users of day-care centres for the elderly and how their every-day lives benefited from having access to this service. For the purpose of this study, in-depth interviews with nine users were conducted. The principle of Grounded Theory was used in the data collection and analyses. One of the core categories that emerged was: The feeling of social deprivation and depression is amended through activities and social contact with other senior citizens. The results showed that loneliness and isolation were widespread among the participants. Having access to the day-care service two-three times a week provided them with a social network and social activities. This, in turn, made them feel more comfortable and in better general health. The most important findings were that the day-care centre represented a sense of community with other senior citizens, activity, a sense of well-being, and care / <p>ISBN 91-7997-122-0</p>

This research examined how college students feel about their professors requesting them to be a Facebook friend. Recognizing the ways in which professors and students communicating through social networking could produce additional educational opportunities for collaboration and instruction, while also causing tension or awkwardness as the process develops. Semistructured interviews were utilized by the researcher to obtain information from the selected participants, and the data were analyzed by comparative methods. Through this study, it was revealed that students are split on the appropriateness of professors as Facebook friends. They prefer little to no self-disclosure from their professors. They do not see Facebook friendships with professors as an invasion of their privacy. Although most students believe Facebook can be an effective educational tool, there are mixed feelings whether using Facebook as an educational tool strips the site of its originally intended social purpose, most students will accept their professor’s Facebook request but only because they feel that they have to. This study extends the limited initial research on Facebook usage in education, namely with students.