Controlled-release formulations for pesticide applications act as depot systems that continuously release the active ingredients into the environment over a speci ed period, usually from months to years. However, some applications require fast-dissolving drug delivery. The interest of this research is in fast-release of water-insoluble pesticides into aquatic environments. This study considered the use of dextrin starch and urea eutectics as fast release, solid dosage carrier forms that contain an active ingredient. The chosen active for this study is an acaricide called amitraz (N-methylbis-(2,4-xylyliminomethyl)- methylamine). The focus is on matrix-based dosage forms such as tablets, granules or bres that either disintegrate or dissolve to release a water-insoluble active. These types of dosage forms can be fabricated using processes such as lyophilisation, spray drying, solvent casting, hot melt extrusion, compression moulding, wet granulation, compaction and electrospinning. A simple melt-casting procedure has been discussed in the present work. Dextrin is a water-soluble form of partially hydrolysed starch and is a promising candidate matrix material for dissolving solid dosage forms. The molecular weight of the dextrin was analysed with MALDI-TOF methods and rheological relations. Glycerolplasticized thermoplastic dextrin-based nanocomposites were prepared with a twin-screw extrusion-compounding process. The nano llers included a layered double hydroxide (LDH), cellulose nano bres (CNF) and stearic acid. The time-dependent retrogradation of the compounds was monitored by X-ray di raction (XRD) and dynamic mechanical thermal analysis (DMA). XRD showed that the inclusion of stearic acid in the formulations led to the formation of an amylose-lipid complex and a stable crystallinity during ageing. Dissolution rates in water for samples containing dextrin starch, were characterised using an iodine indicator and UV-visible spectroscopy. High pressure di erential scanning calorimetry (HPDSC) indicated that the addition of stearic acid led to the formation of amylose-lipid complexes (ALC's). An additive system containing stearic acid and CNF was deemed suitable for compounding with amitraz. Compounding at temperatures above the melting point of the latter led, on dissolution in water, to the release of much ner particles of the acaricide, which was con rmed with particle size analysis (PSA). The addition of the acaricide caused an apparent increase in the dissolution rate of the thermoplastic dextrin. Two eutectic urea systems were considered for casting with amitraz. A eutectic system of urea and acetamide was found to display a melting point of 44 C at a 37 wt.% urea composition. The other system consisting of urea and 1,3-dimethylurea displayed a eutectic point at 32 wt.% urea composition which melted at 59 C. Di erential scanning calorimetry (DSC), however, con rmed a melting point depression due to a high moisture content caused by the compounds high hygroscopicity. The endotherm of the sample containing no excess moisture showed a melting point of 70 C. The 1,3-dimethylurea system was deemed suitable for casting with amitraz. XRD of the eutectic composition indicated a small amount of co-crystallisation. The samples were cast as disks of various diameters while keeping the height of the disks constant. The creation of the cast disks showed automatic generation of a nely dispersed form of the active through the process of melting the deep eutectic solvent, the dissolution of the active and its phase separation on cooling and solidi cation of the eutectic. This implies that ne grinding of the actives might not be necessary. Eutectic casts containing 20 wt.% amitraz dissolved at a slower rate than casts not containing the hydrophobic active ingredient. The advantageous features of these casts were exempli ed using the acaricide incorporated into the urea & 1,3-dimethylurea eutectic. This work provides two safe, biodegradable and water soluble materials for use as a matrix to contain active ingredients. One material, the eutectic organic salt casts, can be produced at low temperatures (<100 C) and can be directly cast into storage containers. The complete dissolution of the cast compounded with a hydrophilic active is rapid (4-6 min). The second material, a thermoplastic dextrin, was melt compounded in an extruder at temperatures not exceeding 120 C. This compound containing 20 wt.% of the active dissolved over a 12 hour period. Dextrin, known to be widely used as an adhesive, will aid in the adhesion of the active ingredient to the surface where it must be used. / Dissertation (MEng (Chemical Engineering))--University of Pretoria, 2020. / PAMSA / Department of Science and Innovation under Grant DST/CON 0004/2019 / Chemical Engineering / MEng (Chemical Engineering) / Unrestricted

This document contains basic principles and processes regarding secure access to web information system. It consists of theoretic and applied part. These are mainly written together in thesis’s chapters. Theoretic informations were tested on simple web application created in PHP computer language on Apache web server using MySQL database. In the beginning, there is an analysis of used programming environment, especially it’s advantages and disadvantages. The main part of this document is simple characterization of many security problems which can be found on many websites all around the world. In the first place it’s a handling problem of inputs and outputs in the web applications. Password disputableness is solving separatelly. Theory of a problem is analysed first of all. Then a couple of solving methods are suggested and the one which is practically realized is described in detail. There is a notification system created which is used to inform user about errors appeared in web application. In the last section there is a client and server certificates described. This document contains fully characterization of used scripts and connection between them. They are supplemented with many pictures and screenshots which are used to better understanding the disputableness of web security.

This thesis deals with the process of contract management in the company Duo Form Ltd. and it's conceptual departments as well as it's manufacturing process. The aim of this work is to analyze the current situation and to propose a better way of contract management. The proposal consists of two parts. The first part deals with contract processing and the proposal talks about implementation of a new management information system. In the second part, the production process is proposed to purchase a new machinery to replace the existing laser. These two parts intend to use the time and cost more effectively in the contract management side and are hoping to be a great asset for customers and for the company Duo Form itself.

The thesis entitled “This is Africa giving form to the informal” arose from a concern with the growing levels of poverty and unemployment in South Africa and the recognition that small scale, self-generated economic activity provides an important means of survival for the very poor. It acknowledges the positive contributions that informal street trading makes to the urban environment. The dissertation draws upon a study of recently initiated projects that aimed to legitimise informal trading, by integrating it in the built environment. It is also driven by a study of the way in which traders organise, claim and define space in the urban environment. This process can be seen as the way in which traders themselves seek legitimacy. Collectively, case studies revealed a number of key elements necessary for the legitimisation of informal trade. Although the area of the proposed intervention is the Pretoria Station precinct, the study acknowledges that there are universal elements contained in informal trading. These elements establish a set of principles that define the minimal intervention necessary in order to allow opportunities for trade to as many people as possible whilst giving the traders themselves the maximum possible room to manoeuvre. In essence, the approach does not argue for the formalisation or ‘neatening’ of informal activity, but aims to give form to activities frequently regarded as illegal, and to provide street market spaces that can function as essential forms of urban infrastructure (Dewar 1990:xi). / Mini Dissertation (MInt(Prof))--University of Pretoria, 2010. / Architecture / unrestricted

This dissertation investigates the transformative possibilities inherent in a contemporary urban artefact in Jeppestown, a significant historical suburb dating back to the settlement of early prospectors who sought a precious yellow metal beneath the red earth of a treeless veld. On this veld today stands the City of Johannesburg. The Johannesburg metropolis is scarred by the intersection of differences between those who have inhabited its streets. It has endured these differences and become a part of them through the multiple generations of its lifetime. Jeppestown or Jeppe to its residents, endures today with latent markings of apartheid as a transitional industrial buffer area west of the Johannesburg Central Business District (CBD). Jeppe exists today as a piece of this narrative and is one of the longest threads in the chronology of the habitation of the greater Johannesburg city. Imminent threats of gentrification and signs of poorly considered urban renewal schemes aimed at the transformation of public space in Jeppe provoke the following questions: What is the potential role of Jeppe within the greater metropolis? And how could the transformation of urban form in this context, through the act of design, begin to transform its potential value, meaning and significance as a place of belonging and becoming – to both those who currently inhabit it and the greater population of the fluctuating metropolis that surrounds it? The proposed intervention is situated in the vicinity of Jeppe market and train station. It forms a part of an investigative framework of architectural and landscape interventions along a regenerative urban spine that connects the station square to Gilfillan Park (Jeppe Park). The objective of the framework is defined as the conditional amplification of extant rituals, negotiated territories and lives & deaths through the introduction of responsive and constructive spatial interventions and the reconciliation of these with the existing fabric. Jeppestown is the subject of this inquiry and intervention, yet its post-apartheid predisposition in the urban context is not exclusive. The intention of the study through design is to postulate and identify a manner of working within the means of the architectural discipline, that itself is aligned with the endeavour of fostering an approach toward place making in the contemporary South African metropolis. This text serves as a record of events that have unfolded through the thoughts, actions and adopted processes for the design and investigation of a transformative urban artefact manifested as a social club in Jeppestown, Johannesburg. / Dissertation (MArch(Prof))--University of Pretoria, 2014. / Architecture / MArch(Prof) / Unrestricted

The following study involve the issue of physical form in public parks and consequently how form is affecting the use of public parks. Subject of the study is that many public parks have the potential of attracting greater numbers of users than the physical form can allow, and that there’s physical aspects that contribute to how parks are used. A greater understanding of the topic and what further measures that can be taken to change the pattern of use in these places are also subjects of the study. These are important topics in the discussion of understanding and furthermore the improvement of public spaces for the use of spatial planners and other related professionals. The study involves observation of form and observation of use in the three chosen public parks of Strandbjörket, Spetsamossen and Linnéparken in Växjö Sweden. The analysis of the observation shows specific qualities but also flaws in the three parks and furthermore opportunities of improvement. The conclusion of the study also shows that additional research in the subject and further studies in the specific parks needs to be done for an improved understanding of the topic and a basis for strategies of improvement in the specific parks. / Följande arbete berör ämnet om offentliga parkers fysiska former och vidare hur dessa inverkar på hur platsen används. Att många offentliga parker har potentialen till att attrahera fler användare än vad formen möjliggör och att det finns fysiska aspekter som är starkt bidragande till hur parkerna används är frågor som undersökningen berör. En förståelse om ämnet och vidare vilka åtgärder som kan förändra användningen av dessa platser är också frågor som omfattas i undersökningen. Dessa frågor är viktiga för fysiska planerare och andra ansvariga yrkesutövare i diskussionen om ämnet och vidare i förbättringsarbetet av offentliga parker. Undersökningen innefattar att observera form och användning av de tre utvalda offentliga parkerna Strandbjörket, Spetsamossen och Linnéparken i Växjö. Analysen av observationerna visar på att tydliga kvalitéer och brister med tillhörande förbättringsmöjligheter förekommer i alla tre offentliga parker. Slutsatserna visar även på att vidare undersökningar inom ämnet och specifikt de tre utvalda parkerna kan vara till fördel för forskningen och bidra till att utgöra ett underlag för åtgärder till förbättring i de tre parkerna.

The increasing challenges caused by non-renewable energy in regard to climate change, the increased flux of migration to urban areas, and the undeniable impact of human activities on these phenomena have given rise to a wide range of scientific work analysing the relationship between urban form and energy. Pioneering research in this field shows a link between the density of cities and their energy consumption. While concerns surrounding sustainable urbanism have grown, urban thinking has evolved, and the interdependence between planning and mobility, and planning and building are increasingly being explored beyond the traditional ways in which they have been considered in isolation. Environmentally conscious design of dense urban forms is thus at the heart of sustainable urbanism. This research uses the concept of urban form to explain the city as a spatial phenomenon. Urban form is proposed as an analytical lens through which the contributions of design characteristics are revealed, for an energy-efficient urban planning policy.Although the link between urban form and energy performance is clearly established, research is lacking on the influence of spatial organization on energy saving in cities from efficient urban fabrics. The urban scale dimension of research on energy consumption attracts much less interest than that of the building, which is very present within the literature. Therefore, the research question was formulated as follows: “How can urban form and energy performance be connected to meet the increasingly unique and changing expectations or needs of places and populations?”. In this regard, the approach adopted in this research is a methodological contribution to knowledge.To answer this question, a research framework was developed with several research methods were employed to answer a set of sub-questions. The first –“What are the links between urban form and energy consumption?”– should be seen as exploratory questions to form a complete picture of the problem. It is answered through a combination of literature review and analysis of urban form elements. The second sub-question –“How can urban form indicators be integrated into the decision-making process for an energy-efficient urban planning policy?– is a fundamental question and is theoretically answered by a literature review and through the development of a theoretical framework. The third sub-question –“What are the links between socio-economic variables, transport infrastructure energy consumption and urban form?”– is the first of three questions that structure the empirical research. It resulted in a statistical data analysis for the selected case area, i.e. the Brussels-Capital Region. The fourth sub-question –“ What are the links between building geometry and solar gains?”– is answered with the analysis of a 3D simulation model of a district area in renovation. The last sub-question –“What are the design priorities required to reduce urban energy use?”– led to the development of a conclusion at multiple scales of urban form analysis. After introducing the topic, the research question and the research framework in the first chapter, chapters 2 to 6 respectively respond to each of the sub-questions. To answer the first sub-question, a historical analysis of the relationship between energy and urban form is presented in chapter 2. The discipline of urban form study in the fields of architecture urbanism and geography introduced four main schools of thought and three main approaches to analyse the urban form during the period 1960-2018. These schools support the viability of urban form analysis as an instrument for planning, as it makes us consider how urban form design affects the energy usage of the city. At the same time, urban planners need to consider the urban not to be simply a set of data, but a subject of inquiry that depends on an assumed initial definition and conceptualisation.In chapter 3, the methodological aspects used in this research are detailed and give an answer to the second sub-question. Four complementary systems of urban form elements are highlighted and connected to the energy indicators identified in the literature review. The scale of analysis for each of the urban form elements is also presented in this chapter with argumentation and detailed definition of the urban indicators. At the same time, the econometric statistical analysis is developed and explain the potential of; correlation, cointegration and causality analysis in building an efficient urban planning policy. In chapter 4, the Brussels-Capital Region mobility data for a 26 years period (1990-2016) are statistically analysed. The link between urban form indicators, transport and socio-economic indicators show the importance of road length development on increasing energy consumption in transport for the region. It also highlights the need for policy planning more inclined to take the “time” into consideration to be able to support future energy-efficient policy measure. In chapter 5, the analysis of the relationships between urban form and energy is scaled down to the street and building scales. A solar analysis is conducted on two different urban form models (the closed block and the open block). The results point to the importance of urban planning design considering open space an object of inquiry rather than simply leftover space between buildings. It is also reasserting the need for 3D model analyses in the preliminary stages of the conception of the technical specifications provided by the region for each project. Finally, in the chapter 6, the applicability and merits of the theoretical framework are first reflected upon. Next, the newly gained insights about the processes behind urban form and energy nexus are presented. Then, an answer is given to the main research question in the form of recommendations. These recommendations are based on the idea that the study of urban form development could be used as a powerful tool for crafting urban regulation guidelines and practices for a more integrated, sustainable urbanism. / Doctorat en Art de bâtir et urbanisme (Polytechnique) / info:eu-repo/semantics/nonPublished

I mitt examensarbete har jag valt att utforska mer komplexa former inom komponerande av rockmusik, för att ta reda på: vilka metoder jag kan använda mig av för att undvika traditionella formmönster, vilka resultat jag kan få när jag använder mig av otypiska formmönster och hur upplevelsen av formdelars funktioner blir när man använder sig av otypiska formdelar. Min metod har varit att ha en egen utgångspunkt till varje låt, till exempel att inte ha några återkommande formdelar, för att kunna bryta de formmönster som jag i vanliga fall använder mig av. I det här arbetet beskriver jag om hur jag gått tillväga under den kreativa processen, och om vad formdelars funktioner kan uppfattas när använder sig av otypiska mönster. De fyra låtarna har spelats in i replokal och i studio. Genom min studie har jag lärt mig att lita på mina instinkter även fast jag inte vet exakt vad de innebär och att saker och ting inte behöver vara självklara från första början.

This research study aims to determine the impact of urban form on social sustainability. Definitions of urban form vary in the literature. One of the definitions describe urban form as spaces that enhance the sense of community, healthy communities and place attachment, while promoting environmental mitigation and adaption measures (Eizenberg &amp; Jabareen, 2017). Likewise, social sustainability has not been clearly defined and universally understood and as a result its importance has been compromised (Vallance, Perkins &amp; Dixon, 2011). This study of urban form also includes testing the success of the process of implementation, with the aim of providing evidence with regards to its success in the shaping of urban form. Important implementation processes of urban form include: planning processes, policies, processes of collaboration and partnership between different agencies, local participation, financial incentives, tax incentives and investment (Burton, Jenks &amp; Williams, 2003). The case study of the research includes two contrasting housing developments that are at opposite ends of the housing spectrum. Masiphumelele, an informal settlement, and Lake Michelle, an Eco-Estate. Both these housing developments are situated between the areas of Noordhoek, Fish Hoek and Sun Valley in the City of Cape Town. This research project makes use of a multidisciplinary approach. Due to the spatial and social nature of the research, methods from both Geography and Urban Design were used. Qualitative methods were used, including interviews, field observation, volunteer work at an NGO, and spatial mapping. The research study finds that urban form does have an impact on social sustainability. The findings reveal that the measure of social sustainability is a result of firstly, the type of urban form. Secondly, it is a result of the nature of the implementation process of urban form. Third, it is a result of the residents’ response to the urban form. Social sustainability is thus not predictable, but the relationship between urban form and social sustainability is predictable. Both high-density and low-density urban forms have positive and negative results, depending on the specific context. Furthermore, the selected criteria with which to define both urban form and social sustainability will have an impact on the relationship between the two. Thus, calling for a uniform definition of both urban form and social sustainability, and the need for a context-specific approach to the design of urban form.

I mitt examensarbete vill jag undersöka form, yta och funktion. Alla tre komponenter kommer bilda en samtidsservis bestående av en serie bruksföremål som är inspirerade av enkla linjer och urban miljö. Min ambition är att de ska användas till vardags. Vilka funktioner behövs i vardagen? Vad är samtidens funktionalism? Jag vill addera olika slags relief som påminner om betong, det ska vara ett enkelt uttryck som kan binda ihop dem olika produkterna med varandra och samtidigt visa på materialens, glas och keramik, olika kvaliteter. Målet är att produkterna ska få fler än ett användningsområde. Hur kan jag ge fler funktioner åt ett objekt?