This dissertation examines a recent work for flute and piano, Here Everything Shines, by a living composer, Charlotte Bray, including a study, analysis and performance guide. The composition was largely inspired by the late Cape Verdean singer Cesária Évora and her song Petit Pays. My research explores the influence of Évora's song on Here Everything Shines, including the melodic development, tonal center, style and freedom of her singing and the impact the song has on a performer's interpretation of Here Everything Shines. The study examines the text of the song, the emotions evoked and reflects on the compositional elements in Here Everything Shines. Originally written for flute and guitar and commissioned by Tom Kerstens for International Guitar Foundation, Here Everything Shines was published in 2015. Bray transcribed it for violin and piano at request of Darragh Morgan and Mary Dullea and subsequently for flute and piano at my request. This dissertation compares the three versions for flute and guitar, violin and piano, and flute and piano and examines the variations between flute and violin as well as guitar and piano parts. The performance guide includes the composer's input on both interpretation and implementation of her ideas throughout the work.

Future 450mm semiconductor wafer foundries are expected to produce billions of low cost, leading-edge processors, memories, and wireless sensors for Internet of Everything applications in smart cities, smart grids, and smart infrastructures. The problem has been a lack of wise investment decision making using traditional semiconductor industry models. The purpose of this study was to design decision-making models to conserve financial resources from conception to commercialization using real options to optimize production capacity, to defer an investment, and to abandon the project. The study consisted of 4 research questions that compared net present value from real option closed-form equations and binomial lattice models using the Black-Scholes option pricing theory. Three had focused on sensitivity parameters. Moore's second law was applied to find the total foundry cost. Data were collected using snowball sampling and face-to-face surveys. Original survey data from 46 Americans in the U.S.A. were compared to 46 Europeans in Germany. Data were analyzed with a paired-difference test and the Box-Behnken design was employed to create prediction models to support each hypothesis. Data from the real option models and survey findings indicate American 450mm foundries will likely capture greater value and will choose the differentiation strategy to produce premium chips, whereas higher capacity, cost leadership European foundries will produce commodity chips. Positive social change and global quality of life improvements are expected to occur by 2020 when semiconductors will be needed for the $14 trillion Internet of Everything market to create safe self-driving vehicles, autonomous robots, smart homes, novel medical electronics, wearable computers with streaming augmented reality information, and digital wallets for cashless societies.

Homeotherms and many poikilotherms display a positive relationship between body size and latitude, but this has rarely been investigated in microscopic animals. We analysed all published records of marine Tardigrada to address whether microscopic marine invertebrates have similar ecogeographical patterns to macroscopic animals. The data were analysed using spatially explicit generalized least squares models and linear models. We looked for latitudinal patterns in body size and species richness, testing for sampling bias and phylogenetic constraints. No latitudinal pattern was detected for species richness, and sampling bias was the strongest correlate of species richness. A hump-shaped increase in median body size with latitude was found, and the effect remained significant for the Northern Hemisphere but not for the Southern. The most significant effect supporting the latitudinal gradient was on minimum body size, with smaller species disappearing at higher latitudes. Our results suggest that biogeographical signals were observed for body size, albeit difficult to detect in poorly studied groups because of swamping from biased sampling effort and from low sample size. We did not find a significant correlation with the latitudinal pattern of body size and ecologically relevant net primary productivity.

The Swedish government has set a target of a 100% renewable electricity system by 2040. To reach this goal, many actions have to be undertaken. Electrification of buildings is one action to be undertaken as the residential sector accounts for a large share of greenhouse gas emissions, where the most energy efficient method is to use heat pumps. Ground Source Heat Pumps typically have the highest efficiency out of the different heat pumps. These types of heat pumps are most commonly used in single family houses, as multi-family houses often are located in highly densely areas. However, when adding hybrid PV/thermal collectors to ground source heat pump systems, studies have shown that the borehole drilling area can be reduced, which increases the potential for combined PV/thermal collectors and ground source heat pump systems in multi-family areas.  In this project, a time-efficient, flexible and user- friendly model was developed to increase the potential for designing combined PV/thermal collectors and ground source heat pump systems. The model is based on the research model by Sommerfeldt and Madani (2019), where the flexibility and time step of the model was investigated and adjusted. The finished model was verified to the model by Sommerfelt and Madani (2019). Overall, the results show that the new model gives similar results to the original model, despite all adjustments. The heaviest adjustments were made in the heat pump where the quantitative results show a mean bias error of -0.51 kWh and a total yearly difference of -5.18% for the compressor power. The corresponding values for the condenser heating rate are -1.05 kWh and -2.86%. The user is able to change boundary conditions such as location, PVT array, building size, and borehole field size. The model takes approximately 2 minutes to run for a 20 years simulation on a business grade desktop computer, which is a five-hour twenty minute reduction from the original research model and assumed to be an acceptable time range for a commercial applications. / Regeringen har satt ett mål om att nå ett 100% förnybart energisystem till 2040. För att nå målet måste många insatser göras. Bostadssektorn står för höga halter av växthusgasutsläpp och elektrifiering av sektorn är en lovande väg att gå. Värmepumpar tillhör de mer energieffektiva tillvägagångssätten, av vilka bergvärmepumpar oftast erhåller den högsta effektiviteten. Bergvärmepumpar är idag mestadels installerat i enfamiljshus där det finns utrymme för att borra borrhål. Flerfamiljshus finns ofta i tätbebyggda områden där ytan tillgänglig för borrhål är begränsad. Emellertid har studier har visat att kombinerade PVT och bergvärmesystem kan minska borrhålsytorna, vilket ökar möjligheten för dessa typ av system även till flerfamiljshus.  Detta projekt syftar till att utveckla en kommersiell modell för design av PVT och bergvärmesystem för att underlätta design av dessa system. Att modellen är kommersiell antyder på att den är användarvänlig, flexibel och tidseffektiv. Modellen är baserad på en forskningsmodell av Sommerfeldt och Madani (2019) men justerades för att möta kraven för en kommersiell modell. Den färdiga modellen jämfördes och verifierades med modellen av Sommerfeldt och Madani (2019). Övergripande visades resultat som är jämförbara med forskningsmodellen, trots alla justeringar. De största justeringarna gjordes i värmepumpen där de kvantitativa resultaten visar ett mean bias error på -0.51 kWh och en årlig skillnad på -5.18% för elbehovet i kompressorn. Motsvarande värden för värmeutbytet i kondensorn är -1.05 kWh och -2.86%. Användaren har möjlighet att ändra gränsvillkor så som geografisk plats, PVT system, byggnadsstorlek och storleken på borrhålsfältet. Den färdiga modellen tar cirka två minuter att köra för en 20-års simulering på en typisk arbetsdator, vilket motsvarar en minskning på 5 timmar och 20 minuter jämfört med originalmodellen. Detta kan anses vara inom tidsramen för kommersiella appliceringar.

Thesis (MA (English))--University of Stellenbosch, 2009. / ENGLISH ABTRACT: In recent years, original and exciting developments have been taking place in Nigerian literature. This new body of literature, collectively referred to as the ―third generation‖, has lately received international acclaim. In this emergent literature, the negotiation of a new, contemporary identity has become a central focus. At the same time, recent Nigerian literary texts are articulating responses to various developments in the Nigerian nation: Nigeria‘s current political and socio-economic situation, diverse forms of cultural hybridisation, as well as an increasing trans-national consciousness, to mention only a few. Three 21st-century novels – Chimamanda Nogzi Adichie‘s Purple Hibiscus (2004), Sefi Atta‘s Everything Good Will Come (2004) and Chris Abani‘s GraceLand (2005) – reveal how new avenues of identity-negotiation and formation are being explored in various contemporary Nigerian situations. This study tracks the ways in which the Bildungsroman, the novel of self-development, serves as a vehicle through which this new identity is articulated. Concurrently, this study also grapples with the ways in which the articulation and negotiation of this new identity reshapes the conventions of the classical Bildungsroman genre, thereby establishing a unique and contemporary Nigerian Bildungsroman for the 21st century. The identity that is being negotiated by the third generation is multi-layered and inclusive, as opposed to the exclusive and unitary identities which are observable in Nigerian novels of the previous two generations. Such inclusivity, as well as the hybrid environments in which this identity is being negotiated, results in a form of ―identity layering‖. Thus, the individual comes into being at the point of intersection, overlap and collision of various modes of self-making. Such ―layering‖ allows the individual, albeit not without challenge, to perform a self-styled identity, which does not necessarily conform to the dictates of society. At the same time, the identity is negotiated by means of an engagement, in the form of intertextual dialoguing, with Nigeria‘s preceding literary generations. The most prominent arenas in which this new identity is negotiated include silenced domestic spaces, religo-cultural traditions, constructs of gender and nation, as well as in multicultural and hybrid communities. The investigation conducted in this thesis will, consequently, also focus on such areas of Nigerian life, as they are portrayed in the focal texts. Various theories of literary analysis (some of which specifically focus on Nigeria), Bildungsroman theory, theories of allegory, (imaginative) nation formation, feminism, gender and performativity, as well as theories of cultural identity and cultural exchanges, will form the critical and theoretical framework within which this investigation will be executed. Chapter One explores how Purple Hibiscus‘s protagonist, Kambili Achike, negotiates her gender identity and voice in order to constitute herself as an independent, self-authoring individual. Chapter Two, which focuses on Everything Good Will Come, investigates the dialectic relationship between Enitan Taiwo‘s national and personal identity, which inevitably leads to her quest to reconceive her gender identity, since national identity, as she finds out, is always an engendered construct. In its analysis of GraceLand, Chapter Three turns to the difficulties that Elvis Oke faces when he attempts to negotiate an alternative masculine identity within a rigid patriarchal system and between the cracks of a fraudulent African modernity. / AFRIKAANSE OPSOMMING: In die afgelope paar jaar was daar opwindende, oorspronklike ontwikkelinge in Nigeriese literatuur. Hierdie nuwe literatuurkorpus, wat gesamentlik bekend staan as die ―derde generasie, het onlangs internasionale erkenning ontvang. In hierdie opkomende literatuur, kry die soeke na 'n nuwe, kontemporêre identiteit ‘n sentrale fokus. Terselfdertyd reageer onlangse Nigeriese literêre werke met verskeie ontwikkelinge in die Negeriese nasie: Nigerië se huidige politieke en sosio-ekonomiese situasie, diverse vorme van kultuurverbastering asook 'n toenemende trans-nasionale bewustheid, om maar ‘n paar te noem. Drie 21ste eeuse romans – Chimamanda Nogzi Adichie se Purple Hibiscus (2004), Sefi Atta se Everything Good Will Come (2004) en Chris Abani se GraceLand (2005) – onthul hoe nuwe kanale van identiteidsonderhandeling en –vorming in verskeie kontemporêre Nigeriese situasies ondersoek word. Hierdie studie ondersoek die maniere waarop die Bildungsroman, die roman van selfontwikkeling, as ‗n medium dien waardeur hierdie nuwe identiteit geartikuleer word. Terselfdertyd sal hierdie studie ook worstel met die maniere waarin die artikulasie en soeke na hierdie nuwe identiteit die konvensies van die klassieke Bildungsroman genre hervorm, en daardeur 'n unieke en kontemporêre Nigeriese Bildungsroman vir die 21ste eeu vestig. Die identiteit wat ontwikkel deur die derde generasie is veelvlakkig en inklusief en staan teenoor die eksklusiewe, eenvormige identiteite wat in Nigeriese romans van die vorige twee generasies opgemerk word. Hierdie inklusiwiteit, sowel as die hibriede omgewings waarin hierdie identeite ontwikkel word, lei tot die vorming van identiteitslae. Die individu kom dus tot stand by die kruising, oorvleueling en botsing van verskillende metodes van selfvorming. Hierdie vorming van lae laat die individu toe, alhoewel nie sonder uitdagings nie, om 'n selfgevormde identiteit te hê wat nie noodwndig aan die eise van die gemeenskap voldoen nie. Terselfdertyd word hierdie identiteit onderhandel deur ‗n skakeling met Nigerië se voorafgaande literêre generasies in die vorm van intertekstuele dialoog. Die mees prominente omgewings waar hierdie nuwe identiteit onderhandel word, sluit stilgemaakte huishoudelike spasies, religieus-kulturele tradisies, konstrukte van gender en nasie, sowel as multi-kulturele en hibriede gemeenskappe in. Die ondersoek wat in hierdie tesis uitgevoer sal word, sal daarom ook fokus op hierdie areas van Nigeriese lewe, soos deur die fokale tekste voorgestel. Verskeie teorieë van literêre analise (sommige wat spesifiek op Nigerië fokus), Bildungsromanteorie, teorieë van allegorie, (denkbeeldige) nasievorming, feminisme, gender en performatiwiteit, sowel as teorieë van kultuuridentiteit en -uitruiling, vorm die kritiese en teoretiese raamwerk waarbinne hierdie ondersoek uitgevoer sal word. Hoofstuk een ondersoek hoe Purple Hibiscus se protagonist, Kambili Achike, haar genderidentiteit onderhandel en uitdrukking gee om haarself as onafhanklike, self-skeppende individu te vorm. Hoofstuk twee, wat fokus op Everything Good Will Come, ondersoek die dialektiese verhouding tussen Enitan Taiwo se nasionale en persoonlike identiteit, wat onvermydelik lei tot die herbedenking van haar genderidentiteit, aangesien nasionale identiteit, soos sy uitvind, altyd 'n gekweekte konstruk is. In sy analise van GraceLand, draai Hoofstuk drie om die moeilikhede wat Elvis Oke in die gesig staar wanneer hy probeer om ‘n alternatiewe manlike identiteit te onderhandel in 'n rigiede patriargale sisteem tussen krake van 'n bedrieglike Afrika-moderniteit.

Magister Legum - LLM / South Africa

Magister Legum - LLM

The introduction of Physical Unclonable Functions (PUFs) and lightweight consensus algorithms to aid in the bolstering of security and privacy in both IoT and IoE does show a great deal of promise not only in these areas, but in resource cost over traditional methods of blockchain.  However, several previous studies make claims regarding performance of novel solutions without providing detailed information as to the physical components of their experiments.  This comparative study shows that Proof of Authentication (PoAh) performs the best out of three selected consensus algorithms and that the claims made regarding the performance of PUFChain and Proof of PUF-enabled Authentication (PoP) could not be replicated in this instance.

With the continuous progress on autonomous vehicle and remote drivingtechniques, connection quality demands are changing compared withconventional quality of service. Vehicle to everything communication, asthe connectivity basis for these applications, has been built up on LongTerm Evolution basis, but due to various ethical and environmental issues,few implementations have been made in reality. Therefore simulation approachesare believed to provide valuable insights.To fully model an LTE vehicular network, in this work we first providea comparison study to select the preferable LTE simulator. Aimingto integrate communication nodes with mobility, a solution for simulationframework is developed based on a state-of-art comparison study on theexisting simulator frameworks. We then further develop the network simulator,and complement it with hybrid wireless channel modeling, channeland quality of service aware scheduler, and admission control strategies. Interms of instant optimization of the network, real-time access is emulatedfor external devices to communicate with the simulator. In this thesis,the evaluation of the framework performance considers two aspects: theperformance of the simulator in LTE V2X use case and the feasibility ofthe service, specifically, remote driving, under realistic network capacity.For our framework, the results indicate that it is feasible to realize remotedriving in an LTE urban scenario, but, as an example, we show that foran area of Kista, five vehicles could be hold by a base-station with guaranteedservice at most. / Med kontinuerliga framstegen p°a autonomt fordon och fj¨arrkontrollteknikf¨or¨andras kravet p°a anslutningskvalitet i j¨amf¨orelse med konventionell servicekvalitet.Fordon till allting (V2X) kommunikation, som anslutningsgrundf¨or dessa applikationer, har byggts upp p°a basis av Long TermEvolution (LTE) system, men p°a grund av olika etiska och milj¨om¨assigaproblem har f°a implementeringar gjorts i verkligheten. D¨arf¨or antas simuleringsmetoderge v¨ardefulla insikter.Att fullt ut modellera ett LTE-fordon n¨atverk, i det h¨ar arbetet ger vif¨orst en j¨amf¨orelsestudie f¨or att v¨alja den f¨oredragna LTE-simulatorn.I syfte att integrera kommunikationsnoder med r¨orlighet utvecklas enl¨osning f¨or ett simuleringsramverk baserat p°a en j¨amf¨orelsestudie p°a befintligasimulatorramar. Vi utvecklar sedan n¨atverkssimulatorn ytterligare,och kompletterar den med hybrid tr°adl¨os kanalmodellering, kanal ochservicekvalitetmedvetna schemal¨aggning och antagningskontrollstrategier.N¨ar det g¨aller direkt n¨atverksoptimering, emuleras realtidsanslutningav externa enheter f¨or att kommunicera med simulatorn. I denna avhandlingutv¨arderas ramverken i tv°a aspekter: simulatorns prestanda i LTEV2X-anv¨andningsomr°adet och genomf¨orbarheten av tj¨ansten, s¨arskilt fj¨arrk¨orning,under realistisk n¨atkapacitet. In v°ara ramverk visar resultaten att det ¨arm¨ojligt att realisera fj¨arrk¨orning i ett LTE-urbana scenario, men som exempelvisar vi att f¨or ett omr°ade i Kista skulle som mest fem fordon kunnask¨otas av en basstation med garanterad service.

This thesis consists of two projects focusing on how 5G can be used to make vehicles safer. The first project focuses on conceptualizing near-future use cases of how Advanced Driver Assistance Systems (ADAS) can be enhanced through 5G technology. Four concepts were developed in collaboration with various industry partners. These concepts were successfully demonstrated in a proof-of-concept at the 5G Automotive Association (5GAA) “The 5G Path of Vehicle-to-Everything Communication: From Local to Global” conference in Turin, Italy. This proof-of-concept was the world’s first demonstration of such a system. The second project focuses on a futuristic use case, namely remote operation of semi-autonomous vehicles (sAVs). As part of this work, it was explored if augmented reality (AR) can be used to warn remote operators of dangerous events. It was explored if such augmentations can be used to compensate during critical events. These events are defined as occurrences in which the network conditions are suboptimal, and information provided to the operator is limited. To evaluate this, a simulator environment was developed that uses eye- tracking technology to study the impact of such scenarios through user studies. The simulator establishes an extendable platform for future work. Through experiments, it was found that AR can be beneficial in spotting danger. However, it can also be used to directly affect the scanning patterns at which the operator views the scene and directly affect their visual scanning behavior. / Denna avhandling består av två projekt med fokus på hur 5G kan användas för att göra fordon säkrare. Det första projektet fokuserar på att konceptualisera användningsfall i närmaste framtid av hur Advanced Driver Assistance Systems (ADAS) kan förbättras genom 5G-teknik. Fyra koncept utvecklades i samarbete med olika branschpartner. Dessa koncept demonstrerade i ett proof-of- concept på 5G Automotive Association (5GAA) “5G Path of Vehicle to to Everything Communication: From Local to Global” -konferensen i Turin, Italien. Detta bevis-of-concept var världens första demonstration av ett sådant system. Det andra projektet fokuserar på ett långt futuristiskt användningsfall, nämligen fjärrstyrning av semi-autonoma fordon (sAVs). Som en del av detta arbete undersöktes det om augmented reality (AR) kan användas för att varna fjärroperatörer om farliga händelser. Det undersöktes om sådana förstärkningar kan användas för att kompensera under kritiska händelser. Dessa händelser definieras som händelser där nätverksförhållandena är suboptimala och information som tillhandahålls till operatören är begränsad. För att utvärdera detta utvecklades en simulatormiljö som använder ögonspårningsteknologi för att studera effekterna av sådana scenarier genom en användarstudie. Simulatorn bildar en utdragbar plattform för framtida arbete. Genom experiment fann man att AR kan vara fördelaktigt när det gäller att upptäcka fara. Men det kan också användas för att direkt påverka skanningsmönstret där operatören tittar på scenen och direkt påverka deras visuella skanningsbeteende.