<p>This Ph.D. thesis addresses topics related to overlay networks, their de_nition,<br />formalization and applications. Descriptions of the Chord and Synapse protocols using<br />the ASM formalism is presented, and both a high-level and a re_ned proof of the<br />correctness of the Chord formalization is given. A probabilistic assessment of the<br />exhaustiveness of the Synapse protocol is performed. An updated version of the<br />Proposal of metadata schemata for movable cultural heritage as well as a Proposal of<br />metadata schemata for describing collections are provided. Based of the Chord protocol, a Distributed catalog of digitized collections of Serbian cultural herigate is implemented.</p> / <p>Doktorska disertacija se bavi temama vezanim za prekrivajuće mreže, njihovom<br />definicijom, formalizacijom i primenama. Dati su opisi Chord i Synapse protokola<br />kori&scaron;ćenjem ASM formalizma, kao i dokaz korektnosti formalizacije Chord protokola<br />na visokom nivou, kao i njegovo profinjenje. Izvr&scaron;ena je verovatnosna ocena uspe&scaron;nosti pretrage pomoću Synapse protokola. Predstavljena je ažurirana verzija Predloga sheme meta podataka za pokretna kulturna dobra, kao i Predlog sheme meta podataka za opis kolekcija. Implementiran je Distribuirani katalog digitalizovanih kolekcija kulturne ba&scaron;tine Srbije zasnovan na Chord protokolu.</p>

Eine Digitalisierung des EAWS-Verfahrens kann bei der Identifikation ergonomischer Probleme und der Ableitung darauf aufbauender Maßnahmen unterstützen. Aktuelle EAWS-Digitalisierungen beschränken sich mehrheitlich auf die Darstellung von EAWS-Punkten und Belastungen. Um EAWS-Auswertungen bedarfsgerecht weiterzuent-wickeln, wurden mit Hilfe einer Online-Befragung der Bedarf und die Anforderungen an EAWS-Auswertungsfunktionen und Gestaltungs-elemente ermittelt. Hierzu wurden auch der EAWS-Nutzungskontext sowie die eingesetzten EAWS-Auswertungssysteme und deren Bewertung erhoben. Insgesamt nahmen 61 Personen u. a. aus den Bereichen Arbeits-planung, IE, Ergonomie, Gesundheitswesen und Management teil. Die Ergebnisse zeigen, für was das EAWS-Verfahren eingesetzt wird, welche Personen daran beteiligt sind, welche Systeme genutzt und welchen Auswertungsfunktionen ein besonderer Bedarf zugeordnet wird. Daraus lassen sich Schwerpunkte für die Weiterentwicklung von EAWS-Auswertungen ableiten.

The master thesis The position and the function of the public service radio in the age of multimedia deals with changes of production of Český rozhlas (Czech radio) from 2005 till the present time in connection with the beginning of multimedia technologies. The most important chapteres of the theoretical part introduce definitions of basic concepts which are important basis for the analytical part: multimedia, media convergence, concept of active audience, interactivity and digitization. Another chapteres deal with public service media and technological and cultural development in the territory of Czech republic. The aim of practical part is to analyze technological changes, which happend in Český rozhlas after beginning of multimedia era, by using the method of case study. The purpose is to do complex introduction of multimedia platforms by means radio mediates its production. Another aim is to find out, how multimedia influence interaction between radio and its audience. The master thesis focus on the analysis of social networks through which Český rozhlas communicates with audience. The text also deal with the question, if beginning of multimedia era influences forms of traditional formats of broadcasting or if new formats emerge.

Cette thèse est le fruit d'un partenariat entre la BL TVFE de NXP Semiconductors et l'ESIEE dans le cadre d'une thèse CIFRE. Le but est d'apporter une solution qui permette la réception de plusieurs canaux pour le câble. Ce sujet est lié à la problématique de numérisation large bande. Dans la première partie, nous faisons un état-de-l'art sur les convertisseurs analogiques-numériques (CAN), sur les architectures parallèles (entrelacement temporel et bancs de filtres hybrides (BFH)), et sur les méthodes d'échantillonnage (passe-bande et complexe). Puis, nous étudions une architecture composée d'un banc de filtres analogiques et un banc de CANs. Nous cherchons à réduire surtout le taux d'échantillonnage. Nous comparons notre solution à un CAN large bande performant, avec notre fonction de coût. L'un des avantages de cette architecture est que tous les composants sont faisables, même les CANs, et qu'il est possible d'éteindre des sous-bandes pour diminuer la consommation. Cette solution est intéressante pour le moment mais n'est pas compétitive en termes de consommation et de surface. Nous proposons une alternative dans la partie 3, avec les BFH. Nous étudions cette architecture, en gardant à l'esprit la faisabilité de la solution. Nous avons choisi un BFH à deux voies, avec un filtre analogique passe-bas et un passe-haut. Puis, nous proposons un algorithme d'optimisation des filtres de synthèse pour atteindre nos objectifs de distorsion et de réjection de repliement. Une identification des filtres analogiques est aussi présentée. Finalement, une réalisation physique prouve le concept et valide les limitations théoriques de cette architecture / This thesis is a partnership between the BL TVFE of NXP Semiconductors and ESIEE. Its goal is to provide a solution to multi-channel reception for cable network. This is linked to the problematic of broadband digitization. In the first part, the state-of-the art of ADCs, parallel architectures (TI and HFB) and sampling methods (bandpass sampling and complex sampling) is recalled. Then we study an architecture called RFFB with a bank of analog filters and a bank of ADCs. We try to reduce the constraints on ADCs, especially the sampling rate with the different sampling. We propose an interesting solution to broadband digitization and compare this solution to a challenging wideband ADC, using the cost function we introduce. This architecture has the major advantage that all the components are feasible, even the ADCs, and it is possible to switch-off subbands to save power. It could be a good solution at the present time but it is not competitive in terms of power consumption and surface. An alternative is proposed in Part 3, where we study Hybrid Filter Banks. It is interesting to study this architecture with realization feasibility in mind. This is why we select a 2-channel HFB with a lowpass filter and a highpass filter as analog filters. Then we propose an efficient optimization algorithm to find the best synthesis filters and reach our targets of distortion and aliasing rejection. An identification of analog filters is also suggested to cope with the issue of sensitivity to analog errors. Finally, a physical realization proves the concept of aliasing rejection and confirms the theoretical issues of this architecture

Aim of the thesis is to analyze the ability of media to provide a sense of ontological security to their users. Changes, related to the transformation of traditional society into a modern society caused in the opinion of Anthony Giddens a weakening of the sense of ontological security of individuals. Such an outcome was a result of the space-time distanciation and individuals opting out of social systems as an impact of some globalization processes. Mass media in the modern society work as a main factor of social integration and differentiation. The ability to construct the sense of ontological security among its recipients is attributing in the field of television studies attributed to the traditional medium, television. But some basic characteristics of television broadcast and the role of television in households have changed with a digital television transition. Employing the methods of qualitative sociological research I will analyze whether new media have the potential to substitute television in the role of providing the sense of ontological security among its users. Powered by TCPDF (www.tcpdf.org)

Digitalisering är en av framtidens starkaste förändringskrafter vilket påverkar revisionsbranschen i en snabb och accelererande takt. Med hjälp av datorer och avancerade programvaror har tekniker utvecklats för att på ett mer effektivt sätt genomföra revision. Idag kan en tydlig förändring inom branschen ses i form av en förenklad vardag, ökad rörlighet och ökad effektivitet som ett resultat av digitalisering. Syftet med denna studie är att undersöka hur de fyra ledande byråerna inom revisionsbranschen arbetar i en allt mer digitaliserad arbetsmiljö. Det som undersöks är digitalisering och dess bidrag till en effektivare revisionsprocess samt digitalisering och dess bidrag till hur revisorns roll har förändrats till att bli allt mer effektiv. Studien är av kvalitativt slag med en ansats som växlar mellan teori och empiri. En dokumentanalys av de fyra ledande byråerna inom revisionsbranschen samt sju semistrukturella intervjuer har gjorts som grund för resultatet. Undersökningarna görs för att utifrån studiens resultat kunna identifiera om digitalisering har de positiva effekter på revisionsprocessen och revisorns roll som tidigare forskning påvisar. Studiens resultat och slutsats visar på att både revisionsprocessen och revisorns roll har påverkats positivt av digitalisering. Idag kan en revision bestående av bättre kvalitét ges tack vare digitalisering och dess utveckling av revisionsprocessen i form av förändrad arbetsmetodik samt implementering av nya verktyg och system, vilket har effektiviserat revisionsprocessen. Resultatet av studien visar även på att revisorns roll har blivit allt mer effektiv som ett resultat av digitalisering och en effektivare revisionsprocess. Revisorns roll har förändrats i de avseenden vilka rör tid, kompetens, ansvar, klientkontakt och social kontakt men där ansvar inte har förändrats i lika stor utsträckning. Då digitalisering frigör tid kan revisorn agera mer likt en rådgivare och lägga mer tid på komplexa frågor inom revision och komplexa samtal med klienter. / Digitization is one of the biggest shifts in today’s world that is affecting the auditing branch rapidly. With the help of computers and advanced software, technologies have been developed to make audits more efficient. Today, as a result of digitization, a clear change in the industry can be seen in form of simplified everyday life, increased mobility and increased efficiency. In this study the purpose is to investigate how the four leading agencies in the auditing industry work in todays digitized environment. What is being investigated is how digitization contributes to a more efficient audit response and how digitization contributes to change the auditor's role to become more effective. This study is a qualitative type that alternates between theory and empirical data. Data that has been used for this study is a document analysis of the four leading agencies in the auditing industry together with seven semi-structural interviews. Surveys are done in order to identify previous researchers’ predication whether digitization has positive effects on auditor's role and their audit process. The results and the conclusion of the study shows that both the audit process and the auditor's role have been positively affected by digitization. Today, an audit consisting of better quality can be achieved thanks to digitization and its development of the audit process in the form of changed work methodology and implementation of new tools and systems, which leads to a more qualified audit. The results of the study also show that the auditor's role has become increasingly effective because of digitization and a more efficient audit process. It also confirms that digitization does have an impact on auditor's role when it comes to time, competence, responsibility, client and social contact, where responsibility has not been affected as much as the other. Digitization also give the auditor the possibility to be more like an advisor, spend more time with clients and deal with more complex issues within auditing.

In today’s society, businesses and organizations are facing increasing challenges to change and adapt to a digitizing world. In order to stay relevant in the market, businesses need to work constantly on developing and improving the efficiency of its various processes. This study is designed as a case study at MittSverige Vatten &amp; Avfall which is a municipal corporation in Sundsvall municipality. Its goal is to be a leader in its sector by the year 2021. The study’s objective was to investigate if the digitization of information gathering could bring benefit to a company and its customers. The investigation has focused on the digitization of information gathering from the customer's water meter. The study's objective has been to identify and analyze how digitization impacts business processes and its financial condition with help from value stream mapping and a customer survey. The study was conducted with the support of written and web based literary sources. A survey as well as interviews was conducted. An investment analysis has been conducted to study and evaluate the benefits that the investment brings the customer and MittSverige Vatten &amp; Avfall regarding cost. The study proved that the digitization of water meters would mean an improvement for both MittSverige Vatten &amp; Avfall and its customers. / Verksamheter och organisationer står i dagens samhälle framför ökande utmaningar till förändringar och anpassning till en digitaliserande värld. För att kunna fortsätta vara relevant på marknaden så behöver verksamheter arbeta ständigt med utveckling och effektivisering av dess olika processer. Denna studie är utförd som en fallstudie hos MittSverige Vatten &amp; Avfall som är ett kommunalt bolag i Sundsvall kommun. Studien hade som syfte att undersöka vad digitalisering av informationsinhämtning kunde tillföra för nytta för ett företag och dess kunder. Undersökningen har fokuserat på digitalisering av informationsinhämtning från kundens vattenmätare. Studien har haft som mål att kartlägga och analysera digitaliseringens effekt på verksamhetens processer och ekonomiskt tillstånd med hjälp av värdeflödesanalys och kundundersökning. En enkät och intervjuer har utförts. En investeringsanalys har utförts för att studera och värdera nyttan som investeringen tillför kunden och MittSverige Vatten &amp; Avfall med hänsyn till kostnaden. Studien bevisade att en digitalisering av vattenmätare skulle innebära en förbättring för både MittSverige Vatten &amp; Avfall och dess kunder.

Background: With the emergence of new digital technologies, the ongoing digital transformation is argued to heavily impact core societal pillars such as logistics and transportation. This has generated unique challenges and introduced an increasing need for organizations to take steps towards innovating their business models. Thus, a popular theoretical lens for keeping up with disruptive changes through business model innovation (BMI) is via the dynamic capability framework – consisting of sensing, seizing as well as transforming microfoundations. Purpose: The purpose of this thesis was to explore digital transformation through the framework of dynamic capabilities within the logistics and transportation industry. The study aimed at investigating the nature of building dynamic capabilities for business model innovation towards the ongoing digital transformation. Methodology: To explore how organizations build dynamic capabilities for business model innovation towards digital transformation, this study was carried out using semi-structured interviews. The interviews consisted of 11 participants in various senior management positions at 6 case companies whom are all global actors in the logistics and transportation industry. Additionally, documentary secondary data was included to provide additional information about the case companies. Findings: Our study revealed that business model innovation for digital transformation consisted of processes within 3 domains – new digital products &amp; services, new markets &amp; segments, as well as key partnerships. Additionally, the findings of our study acknowledged that logistics and transportation enterprises build dynamic capabilities via a total of 13 activities. These included: digital scanning and information management; digital learning; internal communication; digital asset investment; agile working; external partnerships; organizational restructuring; dynamic mindset; change management; and power redistribution. Finally, our study found that the main challenges for building dynamic capabilities towards BMI involved: size, agile working, data management and the changing of old mindsets.

Föreningen av digitala tekniker och logistiska funktioner genom koncept som Industri 4.0 kan komma att förändra många marknader. Detta medför nya förutsättningar för industriföretag som vill fortsätta växa och vara konkurrenskraftiga. Denna studie syftade till att undersöka implementering av modern digital teknik i industriföretag. Författarna undersökte i denna studie vilka motiv som finns för en sådan implementering och vilka faktorer en verksamhet kan behöva beakta vid implementering. Dessutom undersöktes hur effektivitet kan mätas efter implementering både ur tillverkningsperspektiv och perspektiv på interna transporter. Intervjuer genomfördes med såväl ett tillverkande företag som implementerar ett modernt digitalt lagerhanteringssystem i sin verksamhet samt ett konsultföretag som bistod med kompetens för implementeringsprojektet. Fallföretaget i studien befann sig i slutfasen av implementering av ett digitalt lagerhanteringssystem med en funktion för att spåra material genom produktionen. Tidigare hade all planering och inventering gjorts manuellt. Författarna identifierade 14 motiv som kan finnas för tillverkande företag att implementera ett digitalt system samt åtta faktorer som är viktiga att beakta vid sådan implementering. Dessutom identifierade författarna KPI:er som de fann relevanta för mätning av tillverkningseffektivitet samt truckförares effektivitet efter implementering av ett digitalt system. / The union of digital technologies and logistical functions through concepts such as Industry 4.0 could change how a lot of markets operate. This creates new requirements for manufacturing companies who wish to keep growing and to stay competitive. The purpose of this study was to look at implementation of modern digital technologies in an industrial manufacturing context. The authors of this study explored which motives exist for such an implementation and which problems that need to be considered. Furthermore, the authors examined how effectiveness can be measured after implementation from both a manufacturing perspective as well an internal transport perspective. Interviews were conducted with a manufacturing company in the process of implementing a digital warehouse management system as well as a consulting company that provided support to the project. The case company in the study was in the final phase of implementing a digital warehouse management system with a primary feature of tracking material and goods through the production. Prior to this warehouse management system, all planning and stock keeping were performed manually. The authors proposed 14 different motives for manufacturing companies to implement a digital system and eight important factors to be considered when implementing a system such as the one the case company did. The authors also proposed Key Performance Indicators for measuring effectiveness and efficiency of manufacturing operations and forklift drivers, respectively, when a digital system is applied.

Syftet med denna studie är att undersöka hur undervisningen i teknik, kopplat till digitaliseringen, kan gestaltas i förskolan. För att ta reda på detta har intervjuer utförts med fyra pedagoger, dessa pedagoger har även fått svara på en mindre enkätundersökning om digitala verktyg. Resultatet av undersökningen visar att pedagogerna kopplar bygg, konstruktion, skapande, datorer och olika tekniker, exempelvis bak-tekniker till ämnet teknik. När det kommer till användandet av digitala verktyg, visar resultatet att samtliga pedagoger använder digitala verktyg och refererar då främst till lärplattan. Resultatet visar också att digitala verktyg används i låg utsträckning när det kommer till pedagogiska aktiviteter. Resultatet visar också att pedagogerna har olika förutsättningar för att kunna använda digitala verktyg i verksamheten. Detta visar sig när pedagogerna exempelvis berättar om chefernas kunskaper och intresse, tillgängligt material och sina egna kunskaper om digitala verktyg och dess funktioner. / The purpose of this study is to investigate how teaching in technology, linked to digitalisation, can be portrayed in the preschool. In order to find this out, interviews have been conducted with four preschool-educators, these educators have also answered a small questionnaire on digital tools. The result of the study shows that the preschool-educators connects building, construction, creation, computers and various technologies, for example, baking-techniques to the subject of technology. When it comes to the use of digital tools, the result shows that all preschool-educators use digital tools and then refer mainly to the learning tablet. The result also shows that digital tools are used to a limited extent when it comes to educational activities. The result also shows that the preschool educators have different conditions for being able to use digital tools in the preschool. This turns out when the preschool educators, for example, talk about the managers' knowledge and interest, available material and their own knowledge of digital tools and their functions.