Optimal flight in the vertical plane with a vehicle model intermediate in complexity between the point-mass and energy models is studied. Flight-path angle takes on the role of a control variable. Range-open problems feature subarcs of vertical flight and singular subarcs as previously studied. The class of altitude-speed-range-time optimization problems with fuel expenditure unspecified is investigated and some interesting phenomena uncovered. The maximum-lift-to-drag glide appears as part of the family, final-time-open, with appropriate initial and terminal transient maneuvers. A family of, climb-range paths appears for thrust exceeding level-flight drag, some members exhibiting oscillations. Oscillatory paths generally fail the Jacobi test for durations exceeding a period and furnish a minimum only for short-duration problems. Minimizing paths of long duration follow a certain corridor in the V-h chart. The features of the family sharpen for the special case of thrust and drag independent of altitude, and considerable analytical attention is accorded to this for the insight it provides to the more general model. The problem of "steepest climb" is found to be ill-posed with the vehicle model under consideration, straight-vertically-upward maneuver sequences being furnished by a family of paths alternating between upward and downward vertical flight and including a limiting "chattering" member. / Ph. D.

Thesis (MSc)--Stellenbosch University, 2015. / ENGLISH ABSTRACT: Heterophasic ethylene-propylene copolymers, also known as impact polypropylene (PP) copolymers (IPCs) or heterophasic copolymers (HECOs), are a unique group of polyolefins produced through the copolymerisation of ethylene and propylene, with the aim of improving the impact properties of the PP homopolymer at low temperatures. Therefore, this polymer comprises of a PP homopolymer matrix with a dispersed rubbery copolymer phase. Due to their unique properties, HECO polymers have become commercially important materials, with a wide range of applications. Therefore a fundamental understanding of the processes and chemistry that affects their final macroscopic properties needs to be expanded. The main focus of this investigation was to understand why specific organic peroxides influence or interact differently with the various phases of HECO polymers, in order to utilize their properties to obtain HECO polymers with optimal and desired properties. Two HECO polymers with different ethylene contents were fractionated into three fractions (30, 100 and 130 °C), using preparative temperature rising elution fractionation (P-TREF). Each individual TREF fraction was degraded with two different types of organic peroxides, and then characterised using four different analytical tools. The changes in the molecular structures of the different fractions were investigated by Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The changes in comonomer sequence distributions were investigated by carbon 13 nuclear magnetic resonance spectroscopy (13C-NMR). Moreover, the degradation of the different fractions was investigated by high temperature size exclusion chromatography (HT-SEC). The investigation showed that the HECO polymers with different ethylene contents were uniquely altered. It was evident that the ethylene content influenced the degradation behaviour of the HECO polymers. The ability of the peroxide to affect certain regions of the HECO polymer more than others is highly dependent upon its miscibility with certain regions of the HECO polymers. The “visbreaking” efficiency of a specific organic peroxide appears to be primarily dependent on the number of “peroxy” groups it contains in its molecular structure. Stellenbosch University https://scholar.sun.ac.za / AFRIKAANSE OPSOMMING: Heterofase etileen-propileen ko-polimere, ook bekend as impak PP ko-polimere (IPCS) of heterofase ko-polimere (HECO), is 'n unieke groep poliolefiene geproduseer deur die ko-polimerisasie van etileen en propileen, met die doel op die verbetering in die impak eienskappe van die PP homopolimeer by lae temperature. Hierdie polimeer bestaan dus uit 'n PP homopolimeer matriks met 'n verspreide rubberagtige ko-polimeer fase. As gevolg van hul unieke eienskappe, is HECO polimere van kommersiële belang, met 'n wye verskeidenheid van toepassings. 'n Fundamentele begrip van die prosesse en chemie wat die finale makroskopiese eienskappe beïnvloed moet dus uitgebrei word. Die hooffokus van hierdie ondersoek was om te verstaan waarom spesifieke organiese peroksiede verskillende invloede en interaksies met die verskillende fases van HECO polimere het, om sodoende van hul eienskappe gebruik te maak om HECO polimere te verkry met optimale en gewenste eienskappe. Twee HECO polimere met verskillende etileen inhoud was gefraksioneer in drie fraksies (30, 100 en 130 °C), met behulp van preparatiewe temperatuur styging eluering fraksionering (P-TREF). Elke individuele TREF fraksie was gedegradeer met twee verskillende tipes organiese peroksiede en daarna gekarakteriseer deur vier verskillende analitiese metodes. Die veranderinge in molekulêre strukture van die verskillende fraksies was geondersoek met behulp van Fourier transform infrarooi spektroskopie (FTIR) en differensiële skandering kalorimetrie (DSC). Die veranderinge in ko-monomeer volgorde distribusie was bestudeer deur middel van kern magnetiese resonans spektroskopie (KMR). Verder was die degradasie van die verskillende fraksies met behulp van hoë temperatuur grootte uitsluitingschromatografie (HT-SEC) bestudeer. Die ondersoek het getoon dat die HECO polimere met verskillende etileen inhoud uniek gedegradeer was. Dus is dit duidelik genoeg dat die etileen inhoud die degradasie gedrag van die HECO polimere beïnvloed het. Die vermoë van die peroksied om sekere areas van die HECO polimeer meer as ander te beïnvloed is hoogs afhanklik van die mengbaarheid met sekere areas van die HECO polimere. Die "visbreking" doeltreffendheid van 'n spesifieke organiese peroksiede is meestal afhanklik van die aantal "peroksie" groepe in die molekulêre struktuur.

This C-paper looks at Pierce Brown’s book Red Rising. The first book of a two trilogy series set in adystopian future where humankind has terraformed other planets and moons. The paper explains theways in which Red Rising handles class, and classism through a Marxist lens. Through this lens thispaper discusses how the society was due a revolution, and the factors that played a role in it. As Marxbelieves all lower classes will one day realize the oppression they are under and revolt against thebourgeoisie to create a classless system. The paper briefly looks at the societies from Plato’s TheRepublic as well as Aldous Huxley’s Brave New World.

Development of new asphalt technologies to reduce both energy consumption and CO2 production has attracted great interest in recent years. The use of foam bitumen, as one of them, is attractive due to the low investment and production cost. Formation and decay of foam bitumen is a highly dynamic temperature dependent process which makes characterization difficult. In this thesis, new experimental tools were developed and applied for characterizing the foam bitumen during the hot foaming process.  One of the main goals of this study was to improve understanding and characterization of the foam bitumen formation and decay. X-ray radiography was used to study the formation and decay of foam bitumen in 2D representation. The results demonstrate that the morphology of bubble formation depends on the types of bitumen used. Moreover, theoretical investigation based on the 3D X-ray computed tomography scan dataset of bubble merging showed that the disjoining pressure increased as the gap between the bubbles in the surface layer (foam film) decreased with time and finally was ruptured.   Examining the foam bitumen stream right at the nozzle revealed that foam bitumen at a very early stage contains fragmented pieces of irregular size rather resembling a liquid than foam. The result from thermogravimetric analysis demonstrated that residual water content depends on the initial water content, and was found to be between 38 wt% and 48 wt% of the initial water content of 4 wt% to 6 wt%. Moreover the influence of viscosity and surface tension on bubble shape and rise velocity of the bubbles using level-set method was implemented in finite element method. The modeling results were compared with bubble shape correlation map from literature. The results indicated that the bubble shapes are more dependent on the surface tension parameters than to the viscosity of the bitumen, whereas the bitumen viscosity is dominant for bubble rising velocity. / <p>QC 20160303</p>

This study investigated the demand patterns of poor households during a period of rising prices. Focus was on three main constructs namely the poor, rising prices and the demand patterns. The study was on Bophelong, a township in South Africa. This study was conducted from an empirical, quantitative approach which was preceded by a literature review. The main objective of conducting the literature review was to provide a theoretical framework for questionnaire design and empirical work. Cross sectional data was collected at Bophelong households. On completion of the survey, the poor were selected from the non-poor by means of a poverty line. The poor were further divided into two categories, namely moderately poor and the very poor. Moderately poor households were categorised by an income ranging 50% to 99% inclusively of their household poverty line. The very poor households were categorised by an income in the range of 0 to 49% inclusively of their poverty line. Using the above division, the total poverty rate was 56% of the total sample, 26% being moderately poor and 30% very poor. The poverty gap ratio for all the poor in the sample was 0.48, meaning that on average, the poor needed 48% of their current income to reach their poverty line. This ratio was 0.29 for the moderately poor households and 0.69 for the very poor households. A logistic regression done on the determinants of poverty in Bophelong showed that household size, age of the household head, monthly household income and the employment status of the household head were significant in determining poverty. The monthly average household income in Bophelong was R2 910. For the moderately poor households it was R1 641 for the and R932 for the very poor households. Household size was 3.96 for the whole sample size, 2.97 for the non-poor households, 4.2 for the moderately poor households and 4.7 for the very poor households. The study revealed that demand patterns of the poor differ from those of the non-poor. In addition the moderately poor households‟ demand patterns differ from the very poor An analysis of the poor‟s demand patterns during rising prices: the case of Bophelong household. The greatest part of income of the poor is spent on basic food stuffs. The very poor spent more than half of their income (53%) on food. The study indicated that bread is a giffen good only to the very poor households where quantity demanded moves in the same direction with price. In the non-poor households, bread is regarded inferior. A commodity can be overly a necessity, but the degree of necessity differs with a households‟ economic status. In some cases, a commodity was a necessity in the very poor households but a luxury in the non-poor. The way households substitute one good for another depends on their income levels. In conclusion, the study recommends that for poverty alleviation policies to effectively target the very poor in reducing malnutrition and hunger, these very poor should be studied separetely from the poor households. This is because households of different poverty levels face different challenges. A more detailed and deeper study relating to the demand structure of the poor is recommended. There is also a need to explore the survival means of the poor as to direct policy actions aimed at alleviating poverty among the poor in general. / Thesis (PhD (Economics))--North-West University, Vaal Triangle Campus, 2013

Försäljningspriser på den svenska bostadsmarknaden tenderar att i allt högre grad avvika från fastighetsmäklarnas utgångspriser. En förklaring till detta är att fastighetsmäklare inte omedelbart anpassar sig till en stigande prisnivå. Syftet med denna uppsats är att förklara vilka faktorer hos bostadsrätter som är svåra för fastighetsmäklare att värdera i en marknad med stigande priser. Undersökningen är begränsad till att endast behandla fastighetsanknutna faktorer. Genom syftet vill vi bidra till en bättre förståelse kring hur köpares betalningsvilja skiljer sig från fastighetsmäklares värdering i en sådan marknad. För att uppnå syftet har en kombination av kvantitativ och kvalitativ metod använts. Undersökningen baseras på 112 bostadsrätter avyttrade under en tidsperiod av sex efterföljande kalendermånader i Karlstad, Sverige. Grunden till undersökningen är de utvalda bostadsrätternas objektsbeskrivningar. Genom analys av samtliga objektsbeskrivningar och respektive bostadsrätts prisutveckling utifrån utgångspris till försäljningspris har resultat kring faktorer som är svåra att värdera uppnåtts. Resultatet visar att nästan samtliga undersökta faktorer inom värdeteorin är överrepresenterade hos bostadsrätterna med hög prisutveckling. Den faktor med högst representation bland bostadsrätter med en hög prisutveckling är förekomsten av både kakel och klinker i badrum. Tidigare forskning visar att ett väl underhållet och modernt badrum är av stor vikt för köparen. Läget, som enligt teorin är den viktigaste faktorn för en bostads värde, visar i undersökningen inte lika hög överrepresentation hos bostadsrätter med hög prisutveckling mätt i avstånd till kommunikationsmedel och dagligvaruhandel. Detta behöver dock inte betyda att läget inte är den viktigaste värdeskapande faktorn, utan att fastighetsmäklare är väl medvetna om lägets betydelse och således kan värdera denna faktor rätt. Andra faktorer som ingått i undersökningen är antal rum, standard i kök, balkong/uteplats, våningsplan, utsikt över vatten, parkeringsmöjlighet, månadsavgift samt kakelugn/öppen spis. En slutsats är att fastighetsmäklare har svårt att, i en marknad med stigande priser, följa med i utvecklingen och utföra enligt marknaden korrekta värderingar. Undersökningen visar förekomsten av faktorer som fastighetsmäklare värderar korrekt samtidigt som det finns vissa faktorer med större betydelse för köpare, vilket bidrar till att försäljningspriset väsentligt avviker från utgångspriset. / The prices of residentials on the Swedish housing market tends to increasingly deviate from the list price. One explanation is that real estate agents not immediately adapt to the rising prices. The purpose of this paper is to describe the factors of condominiums which are especially difficult for real estate agents to valuate in a period with rising prices. This paper is limited to discribe only the factors related to the condominiums. By this purpose, we want to contribute to a better understanding of how customers’ willingness to pay differs from real estate agents valuation. To fulfill the purpose both a quantitative and a qualitative method has been used. The survey is based on 112 condominiums sold during a period of six following months in Karlstad, Sweden. The basis for the survey are the prospects of the selected condominiums. Through analysis of the prospects and the respective tenant price trends, results about specific factors difficult to valuate are achieved. The result shows that almost all investigated factors in the theory of value are overrepresented among the condominiums with high price trends. The factor that has the highest connection with a high price trend is the presence of both wall and floor tiles and/or clinker in the bathroom. Previous research says that a well-maintained and modern bathroom is important for the buyer. The location, which according to the theory is the most important factor for a residential value, does not show equal high connection according to the survey. This does not clearly mean that the location not is the most important value influcencing factor, rather that real estate agents are well aware of the importance of the location and therefore can valuate this factor correctly. Other factors involved in the survey are the number of rooms, standard in kitchen, presence of balcony/patio, storey, view, parking, the monthly fee and the presence of a stove/fireplace. A conclusion is that real estate agents faces difficulties that in a market with rising prices valuate residential properly and keep up with developments in the market. There are some factors that real estate agents are valuing correctly while other factors have greater importance for buyers and thus contribute to a significantly increase from the initial list price to the selling price.

A análise do comportamento negociador de potências emergentes pode ser considerada como um dos indicadores do posicionamento desses países em um momento de transição de poder na ordem internacional. O modo como esse grupo de países defende seus interesses em uma mesa de negociação assim como as coalizões e estratégias que eles criam para atingir seus objetivos são aspectos definidores de suas políticas externas. A análise de como potências emergentes negociam pode revelar o tipo de potência que esses países podem se tornar em uma nova ordem global. Esta pesquisa investiga como o Brasil negocia para se tornar um tomador de decisão influente no Fundo Monetário Internacional (FMI), analisando se a abordagem brasileira em relação à atual ordem internacional é revisionista ou integracionista. O objeto dessa pesquisa é o comportamento negociador brasileiro no processo negociador que culminou em um novo acordo sobre a distribuição de quotas no FMI em 2010 durante a reunião ministerial do G20, na cidade sul-coreana Gyeongju. O argumento que se desenvolve ao longo do artigo é o de que a crise financeira de 2008 e o crescimento e a estabilidade da economia brasileira na década de 2000 aumentou o poder de barganha dos negociadores brasileiros nas negociações para a reforma do FMI. A conclusão da análise mostra que longe de ser revisionista o comportamento negociador revela estratégias de negociação que visam a integrar o país à ordem existente, buscando seu fortalecimento. / The analysis of the negotiation behavior of rising powers expresses one of the few indicators on their nature at a time of transition in the international order. How countries defend their interests at a table of negotiation as well as the coalitions and strategies they build to achieve their objectives are essential features of their foreign policy. The analysis of how emerging powers negotiate can reveal the type of power these countries may become in a forthcoming world order. This paper thus investigates how Brazil negotiates to become a major stakeholder in the International Monetary Fund (IMF), analyzing whether its approach toward the established order is either revisionist or integrationist. The object of this investigation is Brazilian negotiation behavior on the negotiations of the IMF ?s quota reform agreed in 2010 in Gyeongju (G20 Ministerial meeting), South Korea. It argues that the 2008 ?s financial crisis as well as the emergence of Brazil as an economic powerhouse provided Brazilian negotiators with an increased bargain power to reform the IMF. The outcome of the analysis demonstrates that rather than revisionist Brazilian strategies of negation aim to integrate the country in existing institutions.

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1979. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND AERONAUTICS. / Includes bibliographical references. / by Christopher Graham McMuldroch. / M.S.

In this thesis, I reflect on the ethical and theoretical foundations of researching (and re-searching) sexualized violence with Indigenous girls in remote communities in northern British Columbia, Canada, through a project called Sisters Rising, an Indigenous-led, community-based research study focused on centering Indigenous teachings related to sovereignty and gender well-being. Through an emergent methodology drawing from witnessing and borderland feminisms to conduct arts- and land-based workshops with girls and community members, I sought to unsettle my relationships as a diasporic frontline worker to the communities and lands I work with. To disrupt traditional hegemonic discourses of settler colonialism, I look to arts-based and collective witnessing, reflecting on how alternative, safer spaces for Indigenous girls can be created for resistance and (re)storying connections to land and relationships. / Graduate / 2020-09-12

Bakgrund Sedan början av nittonhundratalet har Storbritannien varit delaktig i flertalet COIN-operationer.Deras erfarenheter har bidragit till att de numera räknas som en framstående nation inom justCOIN. Undersökningen handlar om Irland 1916-1922 och Storbritanniens agerade i förhållande tillden nuvarande brittiska COIN-doktrinen. Syfte Undersökningen skall klargöra, utifrån den nuvarande brittiska doktrinen, vilka skillnader ochmisstag Storbritannien begick under början av nittonhundratalet på Irland i förhållande till dennuvarande COIN-doktrinen. Metod Undersökningen är teorikonsumerande och delar upp teorin i variablerna mål, medel och metod.Dessa jämförs mot analysenheter som utgörs av tre tidsepoker från det anglo-iriska kriget. Slutsatser Undersökningen påvisar att Storbritanniens agerande på Irland i början av nittonhundratalet skildesig markant mot vad den nuvarande doktrinen förespråkar. Framförallt i mängden våld somnyttjades. / Background Since the early twentieth century Britain has been active in many COIN operations. Theirexperiences have contributed to UK counts as a qualified COIN nation. The investigation is about1916-1922 Ireland, and how Britain acted in relation to the current UK COIN doctrine. Purpose The essay should clarify, based on current British doctrine, which differences and mistakes GreatBritain committed during the early twentieth century in Ireland in contrast to the present COINdoctrine. Method The study is theory-consuming and divides the theory in variables: goals, means and method.These are compared against analytical unit consisting of three eras from the Anglo-Irish War. Conclusions The survey reveals that Britain's actions in Ireland in the early twentieth century was verydifferent from what the current doctrine advocates. In particular, the amount of violence whichwere used.