Thesis (Ph.D. (Space Physics)--North-West University, Potchefstroom Campus, 2008.

We are currently experiencing a rapid development of quantum information, a new branch of science, being an interdisciplinary of quantum physics, information theory, telecommunications, computer science, and many others. This new science branch was born in the middle of the eighties, developed rapidly during the nineties, and in the current decade has brought a technological breakthrough in creating secure quantum key distribution (QKD), quantum secret sharing, and exciting promises in diverse technological fields. Recent QKD experiments have achieved high rate QKD at 200 km distance in optical fiber. Significant QKD results have also been achieved in free-space. Due to the rapid broadband access deployment in many industrialized countries and the standing increasing transmission security treats, the natural development awaiting quantum communications, being a part of quantum information, is its migration into commercial switched telecom networks. Such a migration concerns both multiuser quantum key distribution and multiparty quantum secret sharing that have been the main goal of my PhD studies. They are also the main concern of the thesis. Our research efforts in multiuser QKD has led to a development of the five-user setup for transmissions over switched fiber networks in a star and in a tree configuration. We have achieved longer secure quantum information distances and implemented more nodes than other multi-user QKD experiments. The measurements have shown feasibility of multiuser QKD over switched fiber networks, using standard fiber telecom components. Since circular architecture networks are important parts of both intranets and the Internet, Sagnac QKD has also been a subject of our research efforts. The published experiments in this area have been very few and results were not encouraging, mainly due to the single mode fiber (SMF) birefringence. Our research has led to a development of a computer controlled birefringence compensation in Sagnac that open the door to both classical and quantum Sagnac applications. On the quantum secret sharing side, we have achieved the first quantum secret sharing experiment over telecom fiber in a five-party implementation using the "plug & play" setup and in a four-party implementation using Sagnac configuration. The setup measurements have shown feasibility and scalability of multiparty quantum communication over commercial telecom fiber networks.

The purpose of this study was to examine the self-perception of leadership styles of practicing female superintendents in Texas and how their preferred leadership style affected their performance. The study posed the following questions:(1) What are the preferred leadership styles of the practicing female superintendents in Texas as measured by Bolman & Deal’s (2003) four frames of leadership? (2) What are the predominant behaviors that female superintendents in Texas identify within each frame of leadership? (3) How do the preferred leadership styles and behaviors influence the superintendents’ every day performance? This study was relied on a mixed method approach, quantitative and qualitative. The quantitative component involved surveying 50 female superintendents, using the Leadership Orientations (Self-Report) survey (Bolman & Deal, 1990). The qualitative component included a semi-structured interview which asked follow up questions with six selected female superintendents (two from rural, two from suburban, and two from urban districts) who consented to the interview regarding the influence of their leadership preferences. The findings suggest participants’ preferred leadership style relates to the Human Resource frame which include: being an inspirational leader, utilizing interpersonal skills, making good decisions; as well as, coaching and developing people. Findings also suggest that predominant behaviors include: supporting others, building trusting relationships through collaboration, and being participative. The preferred leadership styles and behaviors’ influence on female superintendents’ everyday performance resulted in embracing collaboration, being transparent, sharing a vision, being passionate, and building trusting relationships. Additionally, beliefs and behaviors that lead to success include: being honest, depersonalize the situations, education makes a difference, adopt flexibility, and power to make decisions. The characteristics that lead to success are: being spiritual, being organized, being committed, and willing to help others. Furthermore, the following advice was offered: learn to cope with high level of visibility, become knowledgeable of the district’s needs and characteristics, and develop a professional image. Finally, implications for aspiring female superintendents, superintendent preparation programs and school boards members are also presented. / text

Thesis (Ph.D. (Space Physics)--North-West University, Potchefstroom Campus, 2008.

Thesis (Ph.D. (Space Physics)--North-West University, Potchefstroom Campus, 2008.

Aim: The aim of this comprehensive thesis is to explore different perceptions of public health nursing practice. The intention being to contribute to developing the service, theoretically and practically, in throe with current and future public health needs. Methods: The thesis comprises five studies. Public health nurses, young people, parents and decision makers are interviewed and share their perceptions of public health nursing practice (studies I, II, III and IV). Consultations at local child health clinics, clinics for young people and at school health services are observed (study III). A cross sectional study amongst a sample of doctors, public health nurses, midwives and child protection workers is carried out (study V). The first four studies have an explorative, descriptive design. Study V, with its focus on interprofessional collaboration, is based on the results of studies I, II, and IV. Findings: Study I, a case study, provides a backdrop for the remaining four studies. It focuses on changes the nurses have faced during the period 1984-2005. The results point to issues of visibility and that respect is more important for the nurses than authority or status. Study II is a philosophical study based on interviews with public health nurses. It gives an introduction to the philosophy of Emmanuel Levinas and develops a novel theoretical and practical understanding of aspects of responsibility in public health nursing. Study III shows the importance of relationships with service users in public health nursing practice; and that not only pleasantness but also honesty and openness are important. This study has contributed to further developing models of public health nursing interventions. Decision makers in study IV point to the challenges public health nurses face regarding collaboration, visibility and boundaries. Study V is a cross sectional questionnaire study that focuses on interprofessional collaboration. The results show that size of municipality can influence frequency of meeting points and views on issues relating to collaboration; and that mental health services are those most missed in collaborative relationships. The findings warrant further research and should be of interest when organising municipal health- and social services in Norway. Conclusions: The thesis concludes that service users and decision makers are satisfied with public health nursing services, but that public health nurses face challenges related to collaboration, to boundaries for knowledge and involvement, and in making their health promotive function visible / Denne doktorgradsavhandling: Perceptions of public health nursing practice - on borders and boundaries, visibility and voice, fokuserer på ulike oppfatninger av helsesøsters praksis. Helsesøstre, ungdom, foreldre, samt lokale politikere og administratorer er intervjuet om deres syn på helsesøstertjenesten. Konsultasjoner på helsestasjon for barn, ungdom og i skolehelsetjenesten er observert. Et utvalg av samarbeidspartnere har svart på et spørreskjema om samarbeidsforhold. Avhandlingen består av fem studier. De første fire studier har eksplorativ, deskriptiv design. Studie V er en tverrsnittsstudie som bygger på resultatene fra studiene I,II, og IV. Avhandlingen har til hensikt å løfte frem områder som respondentene mener fortjener oppmerksomhet og som kan ha praktiske og teoretiske implikasjoner for utvikling av tjenesten. Studie I, en case studie danner et bakteppe for de andre studiene. Den fokuserer på endringer i helsesøstertjenesten i perioden 1984-2005. Resultatene fra denne studien peker på helsesøstrenes opplevelse av usynlighet og at respekt er mer viktig for helsesøstrene i studien enn autoritet og status. Studie II er en filosofisk studie basert på intervjuer med helsesøstre. Den gir en introduksjon til Levinas’ filosofi og utvikler en dypere forståelse for teoretiske og praktiske aspekter av etisk ansvar i helsesøsters praksis. Studie III peker på betydningen av relasjoner i helsesøsters praksis. Det var viktig at konsultasjonene var hyggelige for helsesøstrene og brukerne, men ærlighet og åpenhet var også vesentlig for gode relasjoner. Beslutningstakere i studie IV peker på utfordringer helsesøstre har når det gjelder samarbeid, usynlighet, samt grenser for deres kunnskap og involvering. Studie V er en spørreskjemaundersøkelse som fokuserer på samarbeid. Resultatene viser at kommunestørrelse har betydning for hyppighet av møtepunkter og syn på samarbeid og at psykiske helsetjenester er savnet mest i samarbeidsrelasjoner. Disse funn burde være av interesse i fremtidig organisering av helse- og sosialtjenester. Avhandlingen konkluderer med at foreldre, ungdom og beslutningstakere er fornøyde med helsesøstertjenesten, men at helsesøstre står overfor viktige utfordringer i samarbeidsrelasjoner, i forhold til grenser for involvering og i å synliggjøre deres helsefremmende funksjon

Studien undersöker samt diskuterar vilka kommunikationsstrategier ideella organisationer använder för att nå externa intressenter och svarar på följande frågor: Vilka kommunikationsstrategier använder ideella organisationer för att nå externa intressenter? Finns likheter respektive skillnader i hur ideella organisationer kommunicerar, vilka? Studiens teoretiska ramverk bygger på ideella organisationers möjligheter samt utmaningar med perspektiv på strategisk kommunikation. Den primära metod som används är en kvalitativ textanalys av Cancerfondens samt Ung Cancers hemsida då vi granskar hur organisationerna strategiskt arbetar i sin kommunikation. Textanalysen kombineras med kvalitativa samtalsintervjuer och används som komplement för att lyfta samt stödja resonemang. Resultatet visar att Cancerfonden och Ung Cancer på olika vis är duktiga kommunikatörer inom ramen för ett gott anseende. Cancerfonden med fokus på forskningsfinansiering och kunskapsspridning är transparenta och konsistenta i sin kommunikation då statistiska redogörelser och resultat genomsyrar hemsidan. Ung Cancer låter på ett systematiskt sätt integrera frivilliga i kommunikationsprocessen och gör sig mer mottaglig samt öppen för dialog med externa intressenter, vilket resulterar i mer intima relationer med medlemmar. Vad som förenar organisationerna är deras initiativ att göra skillnad. Trots lika engagemang mynnar deras visioner ut i olika spår därmed krävs olika kommunikationsstrategier i den externa kommunikationen.

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10 ans après l’émergence des plates formes socio-collaboratives numériques, leur usage peine à se déployer dans les environnements professionnels, malgré les gains d’efficacité qu’elles permettent, malgré la proximité des outils avec les applications locales traditionnelles, malgré les efforts d’investissement, notamment dans des prestations qui ne parviennent pas à pérenniser les usages. Ce travail démontre qu'une nouvelle forme de visibilité induite par le partage, qui fonde la collaboration numérique, peut être un frein ou un levier à l'adoption, et qu’il convient de l’objectiver dans la démarche ; il approfondit la connaissance du paradigme collaboratif, en propose une typologie des usages fondée sur leur valeur intrinsèque et sociale, une méthodologie d'adoption orientée vers la transformation locale des pratiques professionnelles quotidiennes (Get Collaboration Done!™), ainsi qu'un indicateur de la « valeur » du comportement collaboratif, qui prend la forme d'un indice déterminé selon des modalités algorithmiques (Collaboration-Index™). / 10 years after digital socio-collaborative platforms have released, it appears their use is still not generalized, not taken for granted ; the integration in professional environments seems difficult, despite the promise of efficiencies, despite the proximity of tools with traditional local office applications, despite the efforts particularly in consulting services which fail to perpetuate uses. This work demonstrates that a new form of visibility induced by sharing, which is the foundation of digital collaboration, can be a brake or a leverage for adoption, and that it should be taken into account in the change process; It also contributes to the knowledge of the collaborative paradigm by proposing a typology of uses based on their intrinsic and social value, an adoption methodology geared towards the local transformation of daily work practices (Get Collaboration Done!™), And an indicator of the “Value” of the collaborative behavior, which is figurated (and calculated) by an index determined according to algorithmic modalities (Collaboration-Index™).

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