Denna empiriska studie utgår från problemlösningsuppgifter och syftar till att beskriva hur ungaelever använder laborativt material i en problemlösningsuppgift, samt hur eleverna utvecklar modelleri sina lösningar. Empirin till studien har samlats in genom intervjuer och observationer.Datainsamlingen genomfördes i fem omgångar med två elever under varje tillfälle. Eleverna fickgemensamt lösa problemlösningsuppgifter med multibasmaterial. Metoden för att analysera datan varinnehållsanalys, utifrån en kvalitativ ansats med utgångspunkt i teorin Realistic MathematicsEducation. Resultatet visar att eleverna genom att använda sig av multibasmaterial kan visa sinförståelse och använda det som stöd vid samtal. Det framkommer även i resultatet att majoriteten aveleverna besitter kunskaper om hur de använder multibasmaterialet som en modell av verkligheten.Enstaka elever upplevdes vara på god väg att automatisera modell av till en modell för, för abstraktmatematik. Slutsatsen som kan dras utifrån genomförd studie är att multibasmaterialet underlättar föreleverna i deras samtal och utbyte av tankar i deras lösningsprocess, samt möjliggör för eleverna attskapa modeller av problemlösningsuppgiftens innehåll.

The Party Exercise found on countless career guidance websites and popularized by the best-selling, job-hunting book What Color Is Your Parachute (Bolles, 2015) purports to provide an estimate of an individual's Holland's code. This study examines whether this commonly used Party Exercise accurately predicts an individual's Holland's code (Holland, 1997). Undergraduate students (N=473) completed The Party Exercise and then the Self- Directed Search (Holland & Messer, 2013). The results of this study do not support the use of this popular “Party Exercise” as a valid estimate of an individual's Holland code.

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This thesis explores the design and implementation of a simulation framework created for C2 training environments, focusing on simulating the movement of aircraft and other moving targets between waypoints. The core objective was to develop an extensible, reliable, and realistic simulation system that can adapt to simulate a variety of entities, each characterized by unique movement patterns defined by their type. The simulated input scenarios involve a collection of targets, where each target traverses through a defined set of waypoints according to their specified movement behavior at initialization. The research involved a evaluation of established theories and ideologies of both aircraft and computer simulation, leading to the creation of a framework that leverages Java for its scalability and performance. The framework was designed from the ground up to promote extensibility of various types of moving targets beyond of just that of aircraft, such as helicopters, boats, missiles, and surface vehicles.  The accuracy of the simulation was tested by comparing its output to real-world flight data, demonstrating its capability to mimic realistic aircraft movement within predefined training scenarios. Additionally, the system's extensibility is showcased by simulating two different categories of aircraft—a commercial airliner and a small fighter jet—and illustrating the differences in their generated trajectories. Another outcome is the framework's ability to support real-time simulation, crucial for training scenarios in a C2 context. The system integrates and utilizes concurrent design techniques and dependable design patterns to ensure high throughput and performance, even when scaling to large numbers of targets. The framework's architecture allows for future extension and integration of new target types, without requiring modifications to the existing codebase, by the utilization of Javas SPI.

Firm competitiveness is no longer an industry-specific or regional phenomenon, but it has evolved to have global impacts. The increase in intensity of regional and international competition, ineffectiveness of regional development policies and models has led to the focus on regional economic development. In particular, a focus on industrial cluster promotion, both in developed and developing countries has proliferated owing to their increased success as a sustainable source of economic growth and development. Industrial clusters are a geographically proximate group of inter-connected companies and associated institutions in a particular field, linked by commonalities and complementarities. In addition to industrial cluster formation, firms can also maintain competitiveness through internationalisation. Internationalisation ensures that firms are able to serve many markets from existing manufacturing bases without having to establish production plants in other markets. It reduces the over dependence on domestic markets and business risks associated with dependence on one market. This study identified industrial clusters for the North West Province (NWP) of South Africa using the Structural Path Analysis (SPA) method, as a strategy to enhance firm competitiveness. It contributes to the methods to identify industrial clusters by applying the Power of Pull (PoP) method to prioritise the number of clusters for the NWP. The ten identified industrial clusters and their respective PoP rankings were (i) communication; (ii) real estate; (iii) grain mill, bakery and animal feed products; (iv) building and other construction; (v) basic metal products; (vi) other food products; (vii) agriculture; (viii) non-metallic mineral products; (ix) trade; and (x) dairy products. This study identified the most important centres, in terms of the most contributions to output, employment and profit at the local municipal level across all the ten identified clusters. These centres were Madibeng, Rustenburg, City of Matlosana, Mafikeng and Ditsobotla. This indicates that efforts to stimulate cluster formation in this sector should be focused in these regions. This study also determined whether any association exists between the identified industrial clusters‟ products and services and the realistic export opportunities according to the DSM for products and the DSM for services. Four of the six product clusters were found to have REOs according to the DSM for products, namely grain mill, bakery and animal feeds products, agriculture, non-metallic mineral products and the basic metal products clusters. In terms of services, only two service clusters, namely communication and building and other construction services clusters, were found to have with REOs according to the DSM for services. This study further demonstrated the effects of industrial cluster formation on the regional economy, using social accounting matrix (SAM) multipliers. SAM multiplier analysis was used to demonstrate the output, employment, employment income and gross domestic product (GDP) supported by cluster formation for the NWP. The supported activity for the agriculture and trade clusters was less than the actual activity. The following clusters‟ supported activity was greater than the actual activity; communication; real estate; grain mill, bakery and animal feed products; building and other construction; basic metal products; other food products; non-metallic mineral products; and dairy products. The identified industrial clusters‟ REOs were explored further to provide more details on the products or services identified as having REOs. In addition, the countries to which the identified REOs (products and services) can be exported were discussed. In terms of product clusters identified to have REOs, the export potential values, cell classifications and market accessibility index scores were discussed. In terms of the service clusters identified as having REOs, countries, market access, market openness, import demand and cell classifications were discussed. / PhD (International Trade), North-West University, Potchefstroom Campus, 2014

Firm competitiveness is no longer an industry-specific or regional phenomenon, but it has evolved to have global impacts. The increase in intensity of regional and international competition, ineffectiveness of regional development policies and models has led to the focus on regional economic development. In particular, a focus on industrial cluster promotion, both in developed and developing countries has proliferated owing to their increased success as a sustainable source of economic growth and development. Industrial clusters are a geographically proximate group of inter-connected companies and associated institutions in a particular field, linked by commonalities and complementarities. In addition to industrial cluster formation, firms can also maintain competitiveness through internationalisation. Internationalisation ensures that firms are able to serve many markets from existing manufacturing bases without having to establish production plants in other markets. It reduces the over dependence on domestic markets and business risks associated with dependence on one market. This study identified industrial clusters for the North West Province (NWP) of South Africa using the Structural Path Analysis (SPA) method, as a strategy to enhance firm competitiveness. It contributes to the methods to identify industrial clusters by applying the Power of Pull (PoP) method to prioritise the number of clusters for the NWP. The ten identified industrial clusters and their respective PoP rankings were (i) communication; (ii) real estate; (iii) grain mill, bakery and animal feed products; (iv) building and other construction; (v) basic metal products; (vi) other food products; (vii) agriculture; (viii) non-metallic mineral products; (ix) trade; and (x) dairy products. This study identified the most important centres, in terms of the most contributions to output, employment and profit at the local municipal level across all the ten identified clusters. These centres were Madibeng, Rustenburg, City of Matlosana, Mafikeng and Ditsobotla. This indicates that efforts to stimulate cluster formation in this sector should be focused in these regions. This study also determined whether any association exists between the identified industrial clusters‟ products and services and the realistic export opportunities according to the DSM for products and the DSM for services. Four of the six product clusters were found to have REOs according to the DSM for products, namely grain mill, bakery and animal feeds products, agriculture, non-metallic mineral products and the basic metal products clusters. In terms of services, only two service clusters, namely communication and building and other construction services clusters, were found to have with REOs according to the DSM for services. This study further demonstrated the effects of industrial cluster formation on the regional economy, using social accounting matrix (SAM) multipliers. SAM multiplier analysis was used to demonstrate the output, employment, employment income and gross domestic product (GDP) supported by cluster formation for the NWP. The supported activity for the agriculture and trade clusters was less than the actual activity. The following clusters‟ supported activity was greater than the actual activity; communication; real estate; grain mill, bakery and animal feed products; building and other construction; basic metal products; other food products; non-metallic mineral products; and dairy products. The identified industrial clusters‟ REOs were explored further to provide more details on the products or services identified as having REOs. In addition, the countries to which the identified REOs (products and services) can be exported were discussed. In terms of product clusters identified to have REOs, the export potential values, cell classifications and market accessibility index scores were discussed. In terms of the service clusters identified as having REOs, countries, market access, market openness, import demand and cell classifications were discussed. / PhD (International Trade), North-West University, Potchefstroom Campus, 2014

Die doel van voorligting is om 'n persoon tot selfaktualisering te lei, of anders gestel, om hom te help om sy volle potensiaal te verwesenlik. Die doel wat ook op 'n leersituasie van toepassing is, word moeilik bereik indien 'n leerling onbewus van of onrealisties oar sy potensiaal is. So 'n leerling sal baat vind by 'n voorligtingsprogram waarin realistiese prestasievlakke bepaal word. 'n Empiriese ondersoek waarby 124 graad 11- leerlinge betrek is, is uitgevoer. Veranderlikes soos intelligensie, aanleg, selfkonsep, motivering, belangstelling (brein voorkeur) en studieorientasie is met betroubare instrumente gemeet en deur middel van regressie-analises gekombineer ten einde variansie in prestasie te verklaar. Regressievergelykings is opgestel waarmee realistiese punte in die vernaamste vakke bepaal kan word. / The aim of guidance is to lead a person to self-actualisation or stated differently, to help him to develop his full potential. This aim, which is also applicable to a learning situation, is difficult to attain if a pupil is unaware of, or unrealistic about his potential. Such a pupil will benefit from a guidance programme in which realistic achievement levels are determined. An empirical investigation which involved 124 grade 11 pupils was carried out. Variables such as intelligence, aptitude, self­ concept, motivation, interest (brain preference) and study orientation were measured with reliable instruments, and by means of regression analyses combinations were found to explain the variance in achievement. Regression equations were formulated with which realistic scores could be determined in the most important subjects. / Psychology of Education / M. Ed. (Voorligting)

The overall objectives of this research project were i) to develop and evaluate methods of characterizing nasal spray products using realistic nasal airway models as more clinically relevant in vitro tools and ii) to develop and evaluate a novel high-efficiency antibiotic nanoparticle dry powder formulation and delivery device. Two physically realistic nasal airway models were used to assess the effects of patient-use experimental conditions, nasal airway geometry and formulation / device properties on the delivery efficiency of nasal spray products. There was a large variability in drug delivery to the middle passages ranging from 17 – 57 % and 47 – 77 % with respect to patient use conditions for the two nasal airway geometries. The patient use variables of nasal spray position, head angle and nasal inhalation timing with respect to spray actuation were found to be significant in determining nasal valve penetration and middle passage deposition of Nasonex®. The developed test methods were able to reproducibly generate similar nasal deposition profiles for nasal spray products with similar plume and droplet characteristics. Differences in spray plume geometry (smaller plume diameter resulted in higher middle passage drug delivery) were observed to have more influence on regional nasal drug deposition than changes to droplet size for mometasone furoate formulations in the realistic airway models. Ciprofloxacin nanoparticles with a mean (SD) volume diameter of 120 (10) nm suitable for penetration through mucus and biofilm layers were prepared using sonocrystallization technique. These ciprofloxacin nanoparticles were then spray dried in a PVP K30 matrix to form nanocomposite particles with a mean (SD) volume diameter of 5.6 (0.1) µm. High efficiency targeted delivery of the nanocomposite nasal powder formulation was achieved using a modified low flow VCU DPI in combination with a novel breathing maneuver; delivering 73 % of the delivered dose to the middle passages. A modified version of the nasal airway model accommodating Transwell® inserts and a Calu-3 monolayer was developed to allow realistic deposition and evaluation of the nasal powder. The nanocomposite formulation was observed to demonstrate improved dissolution and transepithelial transport (flux = 725 ng/h/cm2) compared to unprocessed ciprofloxacin powder (flux = 321 ng/h/cm2).

The starting-point of the thesis was that teachers to a large extent teach on the basis of intuitive theories. This creates a tendency that a number of frequent conceptions, pedagogical and didactic theories, experiences of one's own school days etc. become parts of a more fragmentary structure of ideas, rather than a coherent theory of teaching. With the aim of creating a deeper understanding of questions related to teaching and learning, two dominating perspectives were described initial. By putting the intuitive ideas in relation to basic paradigmatic assumptions a picture was given of what the teacher has to know in order to thoroughly understand a certain perspective. In addition, examples of pedagogical theories were presented that can be referred to the perspective in question, which teachers can adopt to qualify their understanding. A critical discussion of the paradigmatic assumptions paved the way for a third perspective, where thoughts occurring in the other two were partly combined. Here a theoretical basis was also presented to explain why the use of mental tools of thinking, especially such that are linked to knowledge theory may lead the teacher to a more reflective way of dealing with questions of teaching and learning. The third perspective was illustrated, first with four examples of how teaching can be performed, and then also in the form of in-service training for teachers. In the empirical section and in the final conclusion the perspectives were illustrated, discussed and examined critically. On the basis of questionnaires answered by upper secondary school teachers, interviews and observations, assumed examples of intuitive theories were presented. The empirical material was also analysed from the same starting-points as the formulation of the perspectives. Ten teachers' systems of intuitive theories about teaching and learning could thus be constructed. Five of these were presented and a comparison with the perspectives was made. Some analyses, however, turned out to agree best with a further perspective, which had not been focused on in the thesis. It was also found that teachers' practice can be enriched by being confronted with scientific knowledge. The value of such knowledge was illustrated through the evaluation of an inservice programme for teachers.