This study explores how contemporary Afrikaans churches represent gender in their visual culture. For these purposes, a Barthean semiotic analysis is done on visual material produced between 2007 and 2008 by three Afrikaans corporate churches in the Pretoria- Centurion area, namely the Dutch Reformed congregations Moreletapark and kerksondermure (“church without walls”), and Doxa Deo’s Brooklyn and East campuses – Afrikaans Apostolic Faith Mission congregations. The analysis seeks to demystify and denaturalise the material’s potentially mythical, ideological and hegemonic underpinnings. Operating from an interdisciplinary theoretical framework comprising aspects of Visual Culture Studies and Gender Studies, this study primarily provides a focused analysis of the representation of men and masculinity in the selected churches according to three themes, namely professional occupation and leadership; physical activity and adventurism; and fatherhood. This focus was adopted owing to the lack of available literature on men and masculinity in the church and Christianity, as opposed to the more ready availability of research on women and femininity. The representation of gender in Moreletapark, kerksondermure and Doxa Deo is conceptualised in broad terms through a comparison of the representation of masculinity with femininity as its foil. In this regard gender is analysed in the three churches according to notions of gendered ontology and matters of work, marriage and family. Exscripted, or non-represented, themes are also problematised. It is argued that the churches under investigation represent gender in dualistic, essentialist and often stereotypical terms. This particular depiction of gender attests to the churches‟ participation in the biological essentialising of gender, polarising men and women into strict binary dualisms, whilst also visually denying the existence of homosexuality and alternative sexualities. This tendency is problematic, not only because it fails to provide a realistic portrayal of men and women in the three churches, but also because it visually participates in conservative and fundamentalist gender discourses. / Dissertation (MA)--University of Pretoria, 2013. / Visual Arts / unrestricted

The aim of this master’s thesis is to describe the Robotic Vision for Bin Picking usage and creating an application for the realization of this task. This application will be able to distinguish several objects based on data from a camera with deep perception and should find the location of object, recognize it and determine its location and orientation. Bin Picking is one of the biggest challenges in today's automation.

This diploma thesis describes the design and assessment of steel structural design of the steel aggregate bins including roofing. The construction has a ground plan of about 33 x 9 m and it is divided into 8 cells bins. Main material is steel, grade S355 and S235. There is developed a static analysis of the main load-bearing parts of the structure, including joints and selected details.

Advances in machine learning, together with an abundance of available data has lead to an explosion in personalized offerings and being able to predict what consumers want, and need without them having to ask for it. During the last decade, it has become a multi billion dollar industry, and a capability upon many of the leading tech companies rely on in their business model. Indeed, in today's business world, it is not only a capability for competitive advantage, but in many cases a matter of survival. This thesis aims to create a machine learning model able to predict customers interested in an upselling opportunity of changing their payment method after completing a purchase with the Swedish payment solutions company, Klarna Bank. Hence, the overall aim is to personalize the customer experience on the confirmation page. Two gradient boosting methods and one deep learning method were trained, evaluated and compared for this task. A logistic regression model was also trained and used as a baseline model. The results showed that all models performed better than the baseline model, with the gradient boosting methods showing the best performance. All of the models were also able to outperform the current solution with no personalization, with the best model reducing the amount of false positives by 50%. / Tillgång till stora datamängder har tillsammans med framsteg inom maskininlärning resulterat i en explotionsartad ökning i personifierade erbjudanden och möjligheter att förutspå kunders behov. Det har under det senaste decenniet utvecklats till en multimiljardindustri och en förmåga som många av de ledande techbolagen i världen förlitar sig på i sina verksamheter. I många fall är det till och med en förutsättning för att överleva i dagens industrilandskap. Det här examensarbetet ämnar att skapa en maskininlärningsmodell som är kapabel till att förutspå kunders intresse för att "uppgradera" sin betalmetod efter ett slutfört köp med den svenska betallösningsföretaget Klarna Bank. Konceptet att erbjuda en kund att uppgradera en redan vald produkt eller tjänst är på engelska känt som upselling. Det övergripande syftet för detta projekt är därför att skapa en personifierad kundupplevelse på Klarnas bekräftelsesida. Följaktligen implementerades och utvärderades två så kallade gradient boosting - metoder samt en djupinlärningsmetod. Vidare implementerades även en logistisk regressionsmodell som basmodell för att jämföra de övriga modeller med. Resultaten visar hur alla modeller överträffade den tillämpade basmodellen, där gradient boosting-metoderna påvisade bättre resultat än djupinlärningsmetoden. Därtill visar alla modeller en förbättring i jämförelse med dagens lösning på Klarnas bekräftelssesida, utan personifiering, där den bästa modellen förbättrade utfallet med 50%.

AbstractIntroduction: - An estimated number of 40 to 80 new-born babies are being abandoned by their mother in Kampala –Uganda annually. These children are usually dumped into dust bins, on streets, on hospital facilities, in bushes or in pit latrines. Aim:-The aim of this study was to investigate the goals of the organizations/institutions working with child abandonment in Kampala, to find out whom they collaborated with, to examine how the staff working with the organization/institution perceive the women who abandon and issue behind. Furthermore their personal incentives to continue to work with the problem, Method: A qualitative approach was used in this study and face to face semi-structured interview were conducted, since this was the best way to explore feelings, thoughts and attitudes of the respondents who gave answers to complicated questions. Research Questions: What are the main goals of the organizations/institutions and with whom do they collaborate with? What are their major hinders and needs? Do they see any progress? What are their perceptions of the mothers who abandon their new-born babies as well as the issues behind this cruel action? When did the staff became aware of this problem and what are the incentives driving them to continue do this work? Results: The results of the study were consistent with the research namely; the role of the organizations was reported being rescuing of the abandoned babies. First they are taken to the hospital during the first critical hours, thereafter are taken. to children court to get a permission to keep them in the children’s home; or find adoptive parent for these children who can give them love, care and education. Tracing mothers or family members was on the agenda, and in some case eventual re-unification was possible. The hinder which were met by the organization while doing their work were financial resources, misinformation about the organizations in the community, poor flow of information, lack of facilities to accommodate abandoned children, and poor collaboration with the government. Conclusion: The organizations/institutions are doing a good work, but procedures which are used at the moment are unfortunately not enough to reduce the problem. Therefore acute and new even radical approaches are needed to be put into consideration.

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No description available.

<p dir="ltr">Corn, a vital cereal grain extensively used in various industries, exhibits viscoelastic properties when subjected to compressive forces. The effect of moisture content on the mechanical behavior of corn is crucial for understanding its storage, processing, and transportation requirements. Understanding the mechanical properties of bulk corn is crucial for ensuring a smooth flow of grains from the bin, thereby helping to prevent confined space-related accidents such as grain bin entrapment and engulfment, which can occur when workers enter the bin to facilitate grain flow. The objective of this study is to investigate the stress and strain relaxation of different bulk corn kernels qualities. In the first study various qualities of bulk corn, including clean corn, corn with impurities, and moldy corn samples were compressed at 42, 77, 106, and 130 N force levels. The compressive behavior of samples was measured at 13.22, 16.16, 18.93, and 21.70% wet basis moisture contents. The samples were compressed at a strain rate of 1.25mm/min, and the strain was kept constant for 200 s to determine the stress relaxation properties. For moldy corn, the energy absorbed increased with force resulting in clump formation irrespective of the force level. In the clean corn, the energy absorbed increased with moisture content, and formation of clumps was observed at 21.70% moisture content. Solidity decreased with moisture content, resulting in high cohesion at moisture contents 18.93% and 21.70% for clean corn. In corn with impurities, even though the energy absorbed increased with moisture content, no clump formation was observed. This study provides insights into the mechanical behavior of bulk corn under compression, such as solidity and compressive strength. An increase in the compressive strength or a decrease in the solidity of stored shelled corn in a grain bin increases compaction, cohesion, and the formation of clumps, and thereby affects the flow of grains during discharge from the bin. The study also highlights potential risks in grain bins when the kernels are moldy and stored at high moisture content.</p><p dir="ltr">The second study investigates the creep behavior of bulk corn kernels and its relationship with moisture content. Clean corn reconditioned to 16.23%, 19.02%, and 21.63% from the initial moisture content of 10.81% were compressed at 42, 77, 106, and 130 N. The viscoelastic behavior of the sample was measured by fitting the experimental data to a four-element Burgers model to obtain the model parameters E₀, E₁, η₀, and η₁. The results showed that the ranges of the elastic modulus (E₀) increase with an increase in moisture content, indicating an increase in compaction and elastic deformation of the sample. Retarded elastic modulus (E₁) values were also high at high moisture content, implying a high absorption of energy. The viscous component shows a dominance of the elastic component due to the low value of η₁ at high moisture content. The findings highlight the importance of considering moisture content in optimizing the handling of corn to enhance safety and efficiency in agricultural operations. Increase in the elastic modulus, retarded elastic modulus, and decrease in the viscous component leads to poor discharge of grains from the bin due to grain bridging or crust, or formation of clump due to out-of-conditioned grain, leading to a potential risk of grain entrapment and engulfment when the grain bin workers get inside the bin. This research contributes to the ongoing efforts to improve grain storage conditions.</p>

Indépendant depuis 1971, le Qatar a longtemps fait partie des micro-États. Le pays a ensuite vécu une forme de révolution avec l’accession au pouvoir de Hamad ben Khalîfa al-Thânî en juin 1995. Le nouvel émir a alors entrepris une politique volontariste de reconnaissance internationale. Le périmètre de son action diplomatique s'est renforcés dans un contexte où l’augmentation de la rente pétrolière a permis à la famille royale de satisfaire les demandes sociales des nationaux. Comme de nombreux États du monde arabe, le régime qatarien devait se doter d’une légitimité prenant en partie appui sur le socle religieux. Cette formule de légitimité a trouvé une part de sa réponse dans la relation nouée avec Yûsuf al-Qaradhâwî.Figure majeure de la scène islamiste contemporaine, cet ouléma a mené une intense activité de prédication. Sa longue présence dans l’émirat lui a permis de tisser un lien particulier avec la dynastie au pouvoir. Souffrant d’un déficit en matière de légitimité religieuse, celle-ci a cherché à utiliser le charisme de l’ouléma au service d’un dessein politique. Se faisant, quels ont été les mécanismes de cette relation originale entre les deux partenaires ? En mobilisant plusieurs concepts de la sociologie politique comme la théorie des champs ou celui des transactions collusives, notre thèse expliquera comment cette interaction a pu produire un dispositif complexe où le Qatar a tiré profit du réservoir de légitimité dont Yûsuf al-Qaradhâwî était le récipiendaire tout en assurant à ce dernier un large périmètre de liberté lui permettant de mobiliser, au profit de l’émirat, ce que nous avons qualifié de « soft power islamique de complémentarité » / Independent since 1971, Qatar has been part of the micro-States. The country then experienced a form of a revolution with the accession to the power of Hamad bin Khalifa al-Thani in June 1995. As a matter of fact, the new Emir undertook a determined policy, internationally recognized, ignoring Saudi Arabia’s role in the region. His diplomatic action was strengthened in a context in which the increase in the oil rent enabled the royal family to satisfy the social demands of the nationals. Like many states in the Muslim world, the Qatari regime had to acquire a legitimacy based on the religious foundation. A legitimacy that found its way into the relations forged with the Islamic scholar Yusuf al-Qaradhawi. Major figure in the contemporary Islamist scene, the ulema has carried out an intense activity of preaching by impelling strong faith-based media coverage with a political aim. His long presence in the emirate allowed him to weave a particular link with the dynasty in power. Suffering from a religious legitimacy deficit, this latter sought to use the charism of the ulema to serve a political purpose whose aim was to diminish the Saudi cultural impact while embodying a competing social model. What were the mechanisms of this original relationship between the two partners? By utilizing several concepts of political sociology such as field theory or collusive transactions, our thesis will explain how this interaction produced a complex mechanism where Qatar exploited Yusuf al-Qaradhawi’s legitimate religious authority figure by enabling him to mobilize, for the benefit of the emirate, what we have called « Islamic soft power for complementary »

In dieser Doktorarbeit werden zwei Konzepte der Quanteninformationsverarbeitung realisiert. Der Quantenschlüsselaustausch ist revolutionär, weil er perfekte Sicherheit gewährleistet. Zahlreiche Quantenkryptografieprotokolle wurden schon untersucht. Zwei Probleme bestehen. Zum einen ist es sehr schwer, die Bedingungen herzustellen, die in den Annahmen für perfekte Sicherheit impliziert sind. Zum anderen sind die Reichweiten auf momentan etwa 200 km begrenzt, aufgrund des abnehmenden Signals gegenüber des konstanten Rauschens. Ein Experiment dieser Doktorarbeit beschäftigt sich mit dem ersten Problem. Insbesondere der übertragene Quantenzustands ist kritisch für die Sicherheit des Verfahrens. Es werden Einzelphotonen von Stickstoff- Fehlstellen-Zentren und zum ersten Mal von Silizium-Fehlstellen-Zentren für einen Quantenschlüsselaustausch mit Hilfe des BB84-Protokolls benutzt. Die Abweichung von idealen Einzelphotonenzuständen sowie deren Bedeutung für die Sicherheit werden analysiert. Die Übertragung von Quantenzuständen via Satellit könnte das Problem der begrenzten Reichweite lösen. Das neue Frequenz-Zeit- Protokoll eignet sich dafür besonders gut. Es wird während dieser Arbeit zum ersten Mal überhaupt implementiert. Umfangreiche Untersuchungen inklusive der Variation wesentlicher experimenteller Parameter geben Aufschluss über die Leistungsfähigkeit und Sicherheit des Protokolls. Außerdem werden elementare Bestandteile eines vollautomatischen Experiments zum Quantenschlüsselaustausch über Glasfasern in der sogenannten Time-bin-Implementierung mit autonomem Sender und Empfänger realisiert. Ein anderes Konzept der Quanteninformationsverarbeitung ist die Herstellung zufälliger Bitfolgen durch den Quantenzufall. Zufällige Bitfolgen haben zahlreiche Anwendungsgebiete in der Kryptografie und der Informatik. Die Realisierung eines Quantenzufallszahlengenerators mit mathematisch beschreibbarer und getesteter Zufälligkeit und hoher Bitrate wird ebenfalls beschrieben. / In this thesis, photonic quantum states are used for experimental realisations of two different concepts of quantum information processing. Quantum key distribution (QKD) is revolutionary because it is the only cryptographic scheme offering unconditional security. Two major problems prevail: Firstly, matching the conditions for unconditional security is challenging, secondly, long distance communication beyond 200 km is very demanding because an increasingly attenuated quantum state starts to fail the competition with constant noise. One experiment accomplished in this thesis is concerned with the first problem. The realisation of the actual quantum state is critical. Single photon states from nitrogen and for the first time also silicon vacancy defect centres are used for a QKD transmission under the BB84 (Bennett and Brassard 1984). The deviation of the used single photon states from the ideal state is thoroughly investigated and the information an eavesdropper obtains due to this deviation is analysed. Transmitting quantum states via satellites is a potential solution to the limited achievable distances in QKD. A novel protocol particularly suited for this is implemented for the first time in this thesis, the frequency-time (FT) protocol. The protocol is thoroughly investigated by varying the experimental parameters over a wide range and by evaluating the impact on the performance and the security. Finally, big steps towards a fully automated fibre-based BB84 QKD experiment in the time-bin implementation with autonomous sender and receiver units are accomplished. Another important concept using quantum mechanical properties as a resource is a quantum random number generator (QRNG). Random numbers are used for various applications in computing and cryptography. A QRNG supplying bits with high and quantifiable randomness at a record-breaking rate is reported and the statistical properties of the random output is thoroughly tested.