Cette thèse porte sur la visibilité de groupes qualifiés d’extrémistes sur internet. Si plusieurs études ont décrit les différents usages des technologies numériques par des groupes radicaux et la manière dont internet serait un catalyseur de radicalisation, peu d’études ont cherché à analyser la relation constitutive entre un dispositif technique et des militants extrémistes. L’objectif de la thèse est de renouveler le modèle de la visibilité médiatisée de groupuscules qualifiés d’extrémistes, en tenant compte des reconfigurations mutuelles entre les plateformes numériques et le groupe militant. Sur le plan théorique, cette recherche se situe à l’intersection de la théorie de l’acteur-réseau, des software studies et des travaux de Lucy Suchman (2007) sur les dynamiques de reconfigurations mutuelles et permanentes des relations entre humains et machines. Basée sur l’étude du cas de l’État islamique, l’analyse s’ancre dans des données provenant d’un terrain de recherche de type ethnographique, collectées sur un an et demi. L’enquête est composée d’une observation non participante menée sur plusieurs plateformes numériques exploitées par le groupe jihadiste, de l’archivage et l’analyse des traces en ligne, ainsi que d’un corpus documentaire. Nos résultats contribuent premièrement à une meilleure compréhension de la visibilité des groupes qualifiés d’extrémiste sur les plateformes numériques, en démontrant qu’elle est relationnelle, technicisée et conflictuelle. Notre étude fait tout d’abord ressortir qu’on assiste à une complexification du tableau de la visibilité. La visibilité en ligne de l’État islamique nécessite un vaste réseau d’acteurs, tels que spécialistes des médias, militants, spécialistes en cybersécurité et botnets. La visibilité mêle ainsi des procédés hors-ligne et en ligne, décentralisés et centralisés. L’analyse des pratiques quotidiennes de visibilité montre que le travail d’apparence des militants de l’État islamique suit un objectif d’amplification et d’abondance de leur flux informationnel. Le but est d’inonder les plateformes de réseaux sociaux de contenus pro État islamique, afin de mener une « guerre médiatique ». Par ailleurs, les résultats suggèrent que la visibilité est complexe en raison des séries de contraintes et de forces ennemies qui contrecarrent le projet en ligne de l’État islamique, tel que la modération de leurs contenus. Parallèlement, notre étude montre que la présence de ces usagers a redessiné la régulation de ces technologies en les rendant plus contraignantes. Enfin, nos résultats dévoilent que les militants de l’État islamique refusent l’assujettissement face aux suspensions répétées dont ils font l’objet. Pour limiter les effets négatifs de la modération, le collectif travaille activement à mettre en place des tactiques de résistance. Dans un second temps, la thèse s’intéresse aux formes de visibilité que cette médiation technique entre les militants et les plateformes numériques configure. Nous proposons le concept de visibilité technicisée pour rendre compte de la visibilité en ligne des opinions politiques. Ce type de visibilité se fonde sur l’incessant déploiement d’une raison technique. En cela, la visibilité devient une activité spécialisée qui exploite les dimensions techniques et automatisées des technologies numériques, avec leurs normativités propres. Si la visibilité technicisée confère aux utilisateurs du pouvoir pour assurer leur visibilité, la thèse émet certaines réserves quant à la valeur réelle de ce faire-voir. Elle montre que, dans la quête d’efficacité et d’abondance qui la caractérise, ce type de visibilité technicisée généralise un ensemble de comportements nuisibles et de procédures trompeuses pour exprimer une opinion politique. Révélatrices de nouvelles formes de domination et d’asymétrie, nous plaidons qu’elle pourrait à terme contraindre le jeu démocratique. / This thesis focuses on the visibility of extremist groups on the internet. While several studies have focused on describing the different uses of digital technologies by radical groups and the way the internet would operate as a catalyst for radicalization, few studies have sought to analyze the constitutive relationship between the technical apparatus and the militant extremist. The objective of the thesis is to renew the visibility model of groups classified as extremists, taking into account the mutual reconfigurations between digital platforms and the militant groups. At a theoretical level, our study is situated at the intersection of actor-network theory (ANT), software studies and Lucy Suchman’s work (2007) on the dynamic reconfiguration of mutual and permanent relationships between humans and machines. Based on the case study of the Islamic State, this analysis, lasting one and a half years, was anchored in data from an ethnographic research field. The survey consists of non-participant observation of several digital platforms exploited by the jihadist group, online archiving and analysis of online traces, as well as a documentary corpus. Our results contribute to better understanding how groups qualified as extremist develop their visibility on digital platforms, by emphasizing that it is relational, technical and conflictual. First of all, our study demonstrates the evolution to a more complex development of the resources used to obtain visibility. The online visibility of the Islamic state requires a vast network of actors, such as media specialists, activists, cybersecurity specialists and botnets. For this reason, offline and online, decentralized and centralized processes are combined. The analysis of their daily practices shows that the work of Islamic state militants to obtain visibility strive at amplification and abundance of their information flow. Their goal is to inundate social media platforms with their contents, conducting a “media war”. Furthermore, the results obtained suggest that developing visibility is complex due to a series of constraints and enemy forces that thwart the Islamic State project, such as moderation of contents as an example. At the same time, our study shows that the presence of this type of users has resulted in the redesign of the regulation of these technologies, making them more restrictive. Finally, the results reveal that the Islamic state militants are actively working to put in place resistance tactics in order to limit the negative effects of that moderation. In a second step, the thesis focuses on the forms of visibility evolving from this technical mediation between activists and digital platforms. We suggest the concept of technical visibility to highlight the online visibility of political opinions. This type of visibility is based on the deployments of a technical rationality. Therein the creation of visibility becomes a specialized activity using the technical as well as mechanized dimensions of digital technologies, each with their own mode of normativity. If technical visibility gives users the possibility to develop their visibility, the thesis expresses certain reservations as to the real value of this “ faire-voir ”. It shows that this type of technical visibility, due to its characteristic quest for efficiency and abundance of information, generalizes bulk, aggressive, or deceptive activity. This results in new forms of domination and asymmetry. We therefore argue that it could jeopardize democracy.

Cette recherche vise à explorer l’organisation complexe et la structure actuelle de la scène Hip-hop underground à Montréal, afin d’expliquer les dynamiques sociales et relations de pouvoir régulant les interactions entre mainstream et underground. Dans une démarche d’étude de cas, nous avons rencontré les artistes-rappeurs des deux collectifs montréalais Kalmunity et Urban Science. Nous avons ainsi observé que ces collectifs sont le lieu d’une forme d’institutionnalisation de la scène. En l’absence de lieux dédiés à la culture, ils permettent la centralisation de ses acteurs et produisent un système de normes et de pratiques sociales partagées dans cette communauté. La scène Hip-hop à Montréal est organisée autour d’un enjeu de visibilité, articulant ses dynamiques sociales et logiques relationnelles. Si les collectifs limitent l’accès à la scène par un système de normes et de conditions d’accès, les médias mainstream quant à eux contrôlent l’accès à une audience de masse en imposant des règles propres à l’univers médiatique. Deux formes de visibilité s’opposent donc : une visibilité underground et sociale structurée par les collectifs, reposant sur la réputation à l’intérieur d’un groupe restreint d’interconnaissances, face à une visibilité mainstream et médiatique, fondée sur le principe de célébrité, propulsée par les médias. Enfin, les scènes underground et mainstream montréalaises ne valorisent pas les mêmes sources d’autorité quant à leurs pratiques sociales et artistiques. Le pouvoir représente pour les artistes underground une forme de domination s’exerçant par l’intermédiaire des médias, qu’ils refusent car jugée extérieure à la scène. À l’inverse, les collectifs représentent pour les artistes une autorité légitime car exercée à l'intérieur de leur communauté, et par conséquent adaptée à la réalité de leurs pratiques artistiques. / This study examines the current organization of the underground Hip-hop scene in Montreal and its power relations. To understand its dynamics, tensions and competition, we investigate the complex structure of the underground scene. Approaching this research as a case study, we met the artists-rappers from the two Montreal’s collectives Kalmunity et Urban Science. We then noticed that the collectives become institutions of the underground scene. With no actual locations dedicated to Montreal's Hip-hop culture, the collectives themselves embody a symbolic space where social actors can gather and create a hub for the network of professionals within the underground scene through a system of rules and social and artistic practices. The underground scene is hinged on the main issue of visibility, organizing the social dynamics and relational logics. We observe two types of visibility : an underground and social visibility structured around the collectives, based on reputation inside a restricted group of artists, facing a mainstream and mediatic visibility, built on fame and propelled by the media. Finally, the underground artists regard power as a form of domination by the media. They refuse the media injonctions seen as extrinsic to the scene. Conversely, the collectives represent a legitimate authority for underground artists, practiced inside their restricted community, therefore coherent to their artistic practices.

This diploma thesis deals with the analysis of selected properties of horizontal road marking (HRM). In terms of anti-skid properties measurements are made to determine the longitudinal friction coefficient, the coefficient of adhesion under different conditions and skid resistance of HRM. Measurements of anti-skid properties are supplemented by measurement of retroreflection of HRM. The theoretical part describes the current state of the issue, general characteristics of horizontal road marking and quantities measured in this thesis (friction and adhesion). The practical part consists of description of used measuring devices, custom solution and results analysis. The solution consists of the description of the measured samples, their preparation, subsequent measurement and a detailed description of the method of measured data evaluation. Data analysis is based on comparison of results obtained from individual sample groups and on comparison of measured values among themselves. The thesis is supplemented with photo documentation and video footage.

This diploma thesis is covering the coverage path planning problem for autonomous robotic lawn mower in an area, which is fully defined before and is not changing. It contains a review of the currently used methods and an implementation of a software with a graphic user interface, which is capable of generating optimalized path.

The occupation of Western Sahara is a question of a forgotten colonization with a very limited framework of international recognition, media acknowledgment and talks. To break the remaining silence and invisibility, human rights activists have developed different initiatives, shedding light on the current situation of Western Sahara. This study investigates the Sahara Marathon campaign, an international sport event that has been developed in the Western Sahara refugee camps of Smara, El Aaiún and Auserd for twenty consecutive years.  Framing the Sahara Marathon as a case study, this degree project aims at inquiring into the potential impact and long-term implications of the international sport campaign, seeking “if” and “how” it contributes towards a social change and an end to the enforced invisibility of “Africa's last colony”, (Güell, 2015). In particular, this qualitative study examines the participatory approach and community engagement promoted through the campaign as well as the awareness-raising and dialogical processes triggered as a result of the Sahara Marathon sport event. The study is grounded on 23 in-depth interviews that have contributed to the external reliability of the research, underlining the reflections shared by organizers of the Sahara Marathon, drivers, freelancers, runners and most importantly human rights activists from Western Sahara. Findings reveal that the Sahara Marathon campaign raises awareness about the current situation in Western Sahara, contributing to a transnational acknowledgment of the conflict. The study also shows that active listening and convivial experiences are promoted throughout the campaign, dismantling stereotypes among communities coming from abroad and Saharawi people living in the refugee camps. In terms of participation, it has been concluded that the campaign uses a participation by consultation approach, needing a new model to showcase the utility and effectiveness of the event as well as to ensure its sustainability in the future.

Supply chains in many industries are experiencing an ever-growing complexity. They involve many actors and, similar to intra-organizational processes, visibility is an important enabler for managing supply chains in an inter-organizational setting. It is the backbone of advanced sup-ply chain (event) management solutions, which serve to detect critical incidents in time and to determine alternative actions. Due to the numerous parties involved, distributed supply chains call for a modular system architecture that aims at re-using visibility data from standardized sources. Following the wide variety of supply chain configurations in many industries there are also many options to design such services. This paper sheds light on these aspects by conduct-ing a case study on EPCIS, a global service specification for capturing and sharing visibility data. Based on three implementations, it shows the main design options for a supply chain vis-ibility service, generic operator models as well as major potentials.:1. Introduction and motivation 2. Research questions and methodology 3. Literature analysis 4. EPCIS case study 4.1. Deutsche Post DHL 4.2. ThyssenKrupp 4.3. GS1 Germany 5. Discussion and findinds 5.1.Design options 5.2. Operator models 5.3. Potentials 6. Conclusions

The use of past archaeological survey data for examination of landscape dynamics became very popular during the last decades of the 20th century, when Geographical Information Systems analysis were introduced in archaeology. In the present thesis, past survey data from Northern Messenia’s Middle and Late Helladic periods are combined to the topography and the environment of the region. These data are examined under the GIS prism, which attempts to update our knowledge on this geographical area.             The main scope of this thesis is to examine potential settlement patterns and land use, connectivity between sites and sites’ hierarchies. In the first query, the Kernel Density analysis has been used for estimating settlements’ patterns, and to consequently estimate preference of specific topographical features for land use, such as slope. Based on the patterns formed as a result of the analysis conducted in the first query, connectivity and hierarchy between sites is being tested with the use of cost connectivity and visibility tools.             The outcome of this analysis shows that the inhabitants of the past were significantly interacting with the landscape, since they preferred to nest around the protective slopes of the Soulima and the Kyparissian valleys. The area around their settlements reveals that these inhabitants opted to cultivate in flat or marginal land, while visibility from the sites seems to be an important factor for monitoring the region. However, it has been proved that a good number of collaborating sites were required to supervise the entire territory, which disproves any hierarchical ranking between them. On the other hand, connectivity depicts potential movement over Northern Messenia’s terrain and indicates that a few sites in the heart of the study area were to be considered as panoptic meeting grounds of the eastern and the western side. In conclusion, the overall analysis reveals a potential spatial bond between sites rather than a relationship based on rivalry.

Fluorkemi används på varselkläder i syfte för att skydda textilen mot smuts, vatten, fett och olja. Kemikalierna är skadliga för människor och miljö, de är dessutom mycket svårnedbrutna eller så bryts de inte ner överhuvudtaget. Kemikalierna är utvecklade av människor och delas upp i perfluorerade och polyfluorerade ämnen (PFAS). PFAS klassificeras också som PBT-ämnen, vilket står för att de är persistenta, bioackumulerande och toxiska. Studien är utförd i ett samarbete med Tranemo Textil AB, där behovet av fluorkarbonberedning på varselkläder undersökts. Syftet med studien är att undersöka utifrån användning och tvättprocess om fluorkarbonberedning är essentiell på varselkläder. Genom intervjuer med experter och tvätterier har studien fått fram information om fluorkemi och hur tvättprocessen ser ut. Resultatet från intervjuerna har kombinerats med tester på tyger och på ett bärprov med ett byxben med fluorkarbonberedning och ett byxben utan. Bärprovet har testats av en person i dennes dagliga arbete under sex månader. Studien har sammanställt resultatet och kan konstatera att fluorkemin har negativ påverkan på människa och miljö, vilket ligger till grund för en diskussion kring vad som är nödvändig användning. Vidare kan det konstateras att fluorkarbonberedningens effekt försämras över tid, genom användning, tvätt och annan yttre påverkan. Slitaget sker ojämnt och vissa delar av ett plagg kan ha god avvisande effekt medan andra delar är så kallade öppna friytor. Smuts kan då gå in under beredningen och kapslas in. I resultatet har det också framkommit att rätt skötsel av den här typen av plagg är viktigt och att återaktivering genom värme är väsentlig. Samtidigt belyser respondenterna återkommande en mentalitet hos arbetare att de vill att plaggen ska visa att de arbetar och därför vara smutsiga, vilket medför att många plagg sällan tvättas. Genom utförda intervjuer och tester har studien kommit till slutsatsen att fluorkemi inte är nödvändig på varselkläder. Den yttre påverkan som relativt snabb sliter på beredningen genom användning och tvätt i kombination med att fluorkemin inte fyller någon långvarig avvisande funktion är aspekter som tagits i hänsyn för slutsatsen. / Fluor chemistry is used on high visibility workwear to protect the textile from dirt, water, grease, and oil. The chemicals are harmful to people and the environment, they are also very degraded, or they do not break down at all. The chemicals are developed by humans and divided into perfluorinated and polyfluorinated substances (PFAS). PFAS is also classified as PBT substances, which means that they are persistent, bioaccumulate, and toxic. The study was in collaboration with Tranemo Textil AB, where the need for fluorocarbon finish for high visibility workwear was explored. The purpose of the study is to investigate if a fluorocarbon finish is essential on high visibility workwear, based on the use phase and washing process. Through interviews with experts and laundries, the study has obtained information about fluor chemistry and how the washing process works. The results of the interviews have been combined with tests on fabrics and on a wear test that has been tested in the person’s daily work for six months. The wear test is trousers with one leg with fluorocarbon finish and the other leg without. The study has compiled the results and can find that fluor chemistry has a negative impact on humans and the environment, which forms the basis for a discussion about what is essential use. Furthermore, it can be found that the effect of the fluorocarbon finish impairs over time, through use, washing, and other external impacts. The abrasion is uneven, and some parts of the garment can still have a good repellent effect, while other parts have so-called open surfaces. On the open surfaces, dirt can enter during the fluorocarbon finish and be encapsulated. The study has also emerged that proper care of this type of garment is important and that reactivation through heat is essential. At the same time, respondents repeatedly highlight workers' mentality that the garment should show and reflect high work ethics. This causes that many garments are rarely washed and become very dirty. Through interviews and tests, the study has concluded that fluor chemistry is not necessary for high visibility workwear. The external effects with relatively quickly abrasion on the finish through use and washing, this in combination with that fluor chemistry does not fulfil any long-lasting function are aspects that have been considered in the conclusion.

Purpose. Supply chain visibility is among the top concerns expressed by many supply chain leaders. While the traditional enablers of supply chain visibility are information sharing, IT implementation, and relationships between supply chain partners; the role of global supply chain standards as an integral part of each of these enablers is often underestimated. The purpose of this thesis is to investigate the adoption and applicability of global supply chain standards within the provisions of supply chain visibility among various supply chain designs. Methodology. With the aim of theoretical replication, three case studies within the retail industry were conducted. Axfood and IKEA cases were analyzed as examples of opposite types of supply chain design and as companies with different degrees of implementation regarding their global data identification standards. The Clas Ohlson case was analyzed to illustrate a company with open paths in regards to its adoption of future global supply chain standards. In-depth, semi-structured interviews were performed directly with company representatives as well as with GS1, which is one of the assignors of this project. Finally, an analytical model for the potential adoption of global standards was developed. Findings. The results of case analysis clearly illustrate that global data identification standards are one of the pillars of supply chain visibility. Different practices of global standard adoption in different supply chain designs are explained by a different need for supply chain visibility among various supply chains. Moreover, the higher the degree of adoption of global standards, the higher the possibility of gaining strategic benefits. Practical implication. The model developed in this research aims to help logistics and supply chain managers estimate the need for supply chain visibility within their supply chains, and to also assess the potential adoption of global data identification standards within their supply chain practices. Originality/value. This study contributes to theory in such areas of research as supply chain visibility, standardization in supply chain management, and supply chain design. The main contribution is made to the resource-based view (RBV) theory, which according to supply chain visibility can be seen as both a strategic resource and a tool for efficiency optimization. A new term in supply chain design which suggests many-to-many and exclusive supply chain classifications is proposed, as is a framework for assessing the need for supply chain visibility. An analytical model for the potential adoption of global standards is also developed. / Research project “The role of global standards for supply chain visibility” at the Industrial Engineering and Management department of KTH

The study of early Greek sacrificial rituals is an under-researched field, as previous scholarship has focused in Late Archaic and Classical Greece to understand and reconstruct Greek sacrifice. This thesis is an attempt to complement our knowledge of early Greek sacrificial practices, which are defined here as thysia, holocaust and moirocaust, focusing in the 8th and 7th century Peloponnese. To achieve this goal, all available archaeological and zooarchaeological evidence from the sanctuaries at Olympia, Isthmia, Nikoleika, Mt. Lykaion and Asea, is incorporated. It is argued that the reconstructed sacrificial norm of thysia is not reflected in the early Peloponnesian evidence and a re-evaluation of Greek sacrifice, at least for the Late Geometric–Early Archaic period, is suggested. The second aspect this thesis is to explore social competition in the given chronological and geographical framework through Greek sacrificial rituals. A new theory based on the notion of visibility is applied, according to which the sacrificer aims to promote themself and earn social capital through direct and indirect visibility achieved from the regular performance of sacrificial rites. It is suggested that the level of visibility in sacrifice is dependent on four parameters: sacrificial ritual and meals, sacrificial investment, sacrificial installation and the status of the sanctuary. / Tidig grekisk offerritual är ett understuderat område, då forskare framför allt fokuserat på det senarkaiska och klassiska Grekland för att förstå och rekonstruera grekisk offerpraktik. Denna uppsats är ett försök att utöka vår kunskap om tidiga grekiska offer, som här definieras som thysia, holokauster och moirokauster, med fokus på 700- och 600-talen på Peloponnesos. För att uppfylla detta syfte studeras all tillgängligt arkeologiskt och animalosteologiskt material från helgedomarna i Olympia, Isthmia, Nikoleika, Lykaionberget och Asea. Uppsatsen hävdar att den antagna normen för djuroffer i form av thysia inte återspeglas i det tidiga materialet från Peloponnesos och att det därför bör det ske en omvärdering av grekiskt offerbruk, åtminstone vad gäller den sengeometriska och tidigarkaiska perioden. Vidare utforskar uppsatsen hur social konkurrens uttrycktes genom offerritual inom samma period och geografiska område. Här appliceras en ny teori baserad på visibilitet. Enligt denna strävar den som offrar att framhäva sig själv och förvärva socialt kapital genom den direkta eller indirekta visibilitet som erhålls från att regelbundet genomföra offerritualer. Fyra parametrar avgör visibilitetens genomslagskraft: ritualen och de efterföljande måltiderna, investeringen i själva offret, installationer för offrets praktiska genomförande och helgedomens status.