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Die invloed van teken op die ontwikkeling van skryfvaardighehe van Graad R-leerders in 'n landelike multigraadskoolvan der Merwe, Rene January 2012 (has links)
Die tesis is voorgelê ter verwerwing van die
graad: Magister in Opvoedkunde aan die
KAAPSE SKIEREILAND UNIVERSITEIT VAN TEGNOLOGIE
Fakulteit Onderwys en Sosiale Wetenskappe, 2012 / The aim of the research was to examine the development of writing skills through drawing in order to identify skills and strategies needed by grade R learners of a rural multi-grade school for motor development and invented writing. Appropriate teaching was researched according to which an intervention programme was developed, applied and evaluated. Literature was examined to establish what is already being taught in this development phase and context. When drawing, children not only go through the same universal development stages and inherent biological processes, but their mark-making has meaning regarding communication and writing. During the drawing process children develop control of large and small motor muscle groups. Through daily drawing activities on different levels through interesting presentation these muscle groups are developed, skills mastered and concentration on the learning process improved. When, however, children come from a home context where a stimulating milieu of learning is lacking, it leads, not only to weak sosio-emotional and cognitive development, but can also be linked to weak health and physical growth, which includes large and small motor skills. These large and small motor skills are required for the development of writing skills which in turn are required for future formal teaching.
The following questions were answered: Which characteristics of drawing are important in writing skills? What appropriate teaching is necessary for drawing and writing competence? How are teaching of drawing and writing skills currently applied in grade R classes in multi-grade schools? Of what components should an intervention programme consist so that grade R learners of a multi-grade school can benefit with regard to writing skills? What requirements must the intervention programme for this special group meet to implement drawing and writing skills in a sustainable way?
Design based research was used as methodology. A literature study was done during the preliminary phase and an intervention programme was designed. During the prototype phase the intervention programme was implemented and honed by repeated design cycles. Assessment showed that the intervention met the preconceived specifications by achieving remarkable results in respect of the general poise, action of drawing, position of drawing, posture, dominance and grip. The development levels of the children were increased by daily drawing accompanied by conversation and writing modelling. During the three phases data was collected in the following ways: informal conversations with the teacher; a semi-structured interview with the teacher; check-lists; a pre and post test; participatory observation; artefacts (children’s art); video recordings and field-notes. A needs analyses and expert appraisal were used as strategies.
To be able to write is a basic skill, and without it the future prospects of the children are seriously hampered. Early stimulation and exposure to drawing media and instruments, the manipulation thereof and the development of large and small motor skills to enhance writing skills, therefore play a decisive role in the optimal development of the children. When children have the ability to write it leads to a future of opportunities for schooled and highly schooled labour which in turn contributes to the economic stability of the country.
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Coping strategies of new school principalsBruintjies, Brent Peter Francois January 2007 (has links)
Thesis submitted in partial fulfillment of the requirements for the degree of
Magister of Technologiae:
Educationis
In the Faculty of Education and Social Sciences
at the
Cape Peninsula University of Technology
2007 / Currently any Post Level One Educator in South Africa may be appointed to the position of
School Principal with only the basic qualification, i.e. matric and a three-year teaching diploma
(REQV 13). As per the Educators Employment Act (1998), the minimum teaching experience
required for a principalship range from 3-7 years depending on the grading of the school (P1- 4
for primary schools and S1 -4 for secondary schools). According to these stipulations, a
qualification in management or another form of validation to ensure that candidates have the
ability to cope with the demands of the management of a school is not a requirement.
The purpose of this study is to investigate the challenges experienced and coping strategies new
school managers (school principals) employ to manage their institutions. It also addresses the
common challenges and obstacles faced by new school managers.
The study was conducted in the Western Cape using a mixed method qualitative approach to
investigate the research questions. After the development of the data collecting instruments, data
was collected using semi-structured questionnaires and interviews. The questionnaires were sent
to thirty school managers in primary and secondary schools in the seven Education Management
Development Centres. The data collected was used to ascertain what the challenges are school
manager's face. Subsequently five new school managers were interviewed to find what coping
strategies they use. A second set of questionnaires were sent to 100 new school principals to
ascertain the challenges experienced and coping strategies employed.
The research reveals the following aspects: (1) there is a lack of support from the Western Cape
Education Department for new school principals; (2) research respondents identified a need for
mentoring to assist them to cope; (3) there is a need for a management qualification to help
principals to manage their schools as educators are only trained to become classroom teachers;
( 4) the Western Cape Education Department need to consult with schools regarding, among
others, schools' year programs as this clash with dates of departmental programmes.
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An analysis of industry relevance of acquired project management skills within a University of TechnologyEigelaar, Andries J January 2012 (has links)
Master of Technology Business Administration in Project Management in the Faculty of
Business at the Cape Peninsula University of Technology, 2012 / The purpose of this study is to investigate the understanding and awareness of Project
Management graduates regarding the soft and hard skills of Project Management,
specifically the application of these skills in the successful outcome of projects. The research
participants for this study were BTech Project Management graduates from CPUT.
This study investigates the perceptions of the critical cross-field outcomes of the BTech
Project Management programme in association with the Project Management Body of
Knowledge (PMBOK) with regard to hard and soft skills.
As Project Management continues to grow as a discipline; it is becoming more evident that
success of the role of project managers cannot be attained with technical skills only. Hard
skills are being recognized as one of the minimal requirements for a project manager. A
need for excellent interpersonal or soft skills are necessary conditions for success, and
although some would disagree, others advocate that these are skills that can be taught and
learned rather than skills that are innate or genetic.
Considerable effort has been made in the area of hard skills processes, tools and
techniques. Project Management methodologies are being developed and improved, but still
a large number of projects do not deliver. Apart from hard skills, research in the area of soft
skills is promising. A range of soft skills attributes required by project managers has been
acknowledged.
Good Project Management requires not only knowledge of and the ability to apply technical
or “science” skills, but also the softer “art” skills, which include human behaviour and
interactions.
Applying the right balance or mix of art and science, which will vary for different projects, is
key to successful Project Management.
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Development of a power distribution module for a nanosatelliteMaleka, Motlokwe January 2013 (has links)
Thesis submitted in partial fulfilment of the requirements for the degree
Magister Technologiae: Electrical Engineering
in the Faculty of Engineering
at the Cape Peninsula University of Technology
2013 / The space environment is characterised by harsh radiation, extreme temperatures and
vacuum. Electronics subsystems for satellite applications are designed to be fault tolerant
and robust enough to survive this environment. A power distribution module (PDM) for a
CubeSat nanosatellite application is developed here, with the aim to distribute power to
CubeSat subsystems reliably. The PDM prototype is carefully designed with reference to an
extensive literature study. The study dwells on the low Earth orbit (LEO) space environment,
critically identifying radiation sources and temperature ranges in the LEO. The study further
investigates traditional analogue techniques of logic circuit design using bipolar junction
transistors (BJTs) which are known for their higher tolerance to radiation sources as
compared to recent integrated circuits (ICs). Careful consideration is given to different ways
of designing a fault tolerant system. The study specifically looks at redundant circuit design
within the limitations of weight and space of a nanosatellite. Possible electrical faults in
power systems are identified, which include over-currents, over-voltages, over-temperatures,
inrush currents and latchup. This study shows that identified faults generally are overcurrents.
A power switch is included in each power distribution channel to trip the current in
case a faulty condition is detected. The PDM is designed to have eight power output
distribution channels to allow a subsystem load to connect to more than one channel,
thereby meeting its power requirements. The PDM power channels are designed identically.
Upon application, current limits are selected by a two-resistor divider circuit and connectors
are used to connect to a required voltage bus at manufacturing time. The system’s
functionality is tested and verified using an Arduino development board interfaced to all I2C
devices as a master node, typically the on-board computer (OBC) in a real satellite mission.
The system’s functionality in a Gamma irradiated laboratory environment is verified to
perform as required. The PDM system is further tested in a temperature cycled chamber
from -31°C to 61°C. The system survived the entire eight hour test duration of two cycles. It
is observed that the system is fault tolerant to radiation sources up to 10 krad and the
temperature limits mentioned. The PDM system is recommended as an additional module to
the CubeSat electrical power subsystem (EPS), thereby improving the reliability of the power
subsystem.
Keywords: CubeSat, power channel, module, radiation, reliability, efficiency, I2C, prototype.
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Design and development of medium voltage open rack harmonic filters for distribution networksMeru, Alan Henry Micheni January 2013 (has links)
Thesis submitted in fulfilment of the requirements for the degree
Master of Technology: Electrical Engineering
in the Faculty of Engineering
at the Cape Peninsula University of Technology
2013 / Harmonic voltages and currents in distribution networks are on the increase in recent times
due to the introduction of a proliferation of electronic controlled devices such as variable
speed drives. These non-linear devices improve efficiency but distort the supply waveforms.
To address the harmonic issues, harmonic filters are used to mitigate distortion levels and
prevent damage. These harmonic filters are commonly found at medium voltage levels in
power systems. The problem is that knowledge from the design to commissioning stages of
these medium voltage harmonic filters are neither well developed nor adequately
documented. The aim of this research is to investigate and expound upon the process whilst
taking into account all the factors involved throughout the process from bringing such a filter
into operation in the real world.
Medium voltage harmonic filters are usually the open rack type found in outdoor installations.
Capacitors and reactors are the main components used in the construction of such harmonic
filters and in some instances resistors are also used. The physical size and spacing of such
components determines the construction layout area and how this is done in practice
warrants being researched and explained in this thesis.
In order to make these factors explicit, a methodology is developed from design, to
installation and commissioning and is applied to two networks which are used to prove that
the developed methodology is applicable for the different types of harmonic filters designed.
The network voltage levels are also different, thus implying that the components will have
different design factors. The final arrangements of the harmonic filters are later drawn and
shown in three-dimension (3D) as per dimensions. The 3D figures are a further contribution
as the design is taken from theory and is ultimately implemented into an installation and
construction layout for erection at site.
Interviews and surveys are conducted with specialists in industry dealing with harmonic filter
applications and the results are analysed as part of implementation of the developed
methodology.
The design, installation and construction phases are documented and shown to be effective
in application and the work disclosed in this thesis will help newcomers to this specialised
field and is recommended for use in industry.
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Reduction of ammonia from wastewater effluent using modified activated clayIlunga, Wighens Ngoie January 2013 (has links)
Thesis submitted in partial fulfilment of the requirement for the degree of
Master of Technology: Chemical Engineering
at the Cape Peninsula University of Technology, 2013 / It has been noticed that effluent from wastewater treatment plants in South Africa does not
comply with the minimum requirements of environmental standards of wastewater effluent
for discharge into the environment. This is due to the presence of soluble, persistent organic
pollutants (POPs) and other related pollutants, in particular ammonia (PakWaterCare
Services, 2011).
To rectify this situation, this study sought to treat wastewater effluents, initially using natural
clay (bentonite and Montmorillonite). Secondly, the clay was activated by sulphuric acid to
increase its adsorptive properties. The concentration of sulphuric acid ranged from 0.5M to
18.4M so that the effective concentration could be reached. Tests were carried out to
evaluate the dosages and conditions (mixing and flocculation stirring speeds, durations, and
settling times) required to achieve optimum POPs capture. The experiment was conducted
two ways: 1) at first the only bentonite was used, and 2) samples were subsequently
activated with H2SO4 (6M; 8M and 11M). The dosage of the coagulant into the jar tester
beakers per litres of water was 0.5; 1; 1.5; 3; 5 and 10g. And then, by keeping the mixing
speed (rapid mixing at 150rpm for 1min and slow mixing at 20rpm for 20min) and settling
time constant (30min), the bentonite and Montmorillonite were activated by H2SO4 (0.5M;
3M; 5M; 11M and 18.4M).
It was observed that for an increase in coagulant dosage, a decrease in pH was observed.
This was due to an increase in acid dosage which influences the acidity of the water. The
achieved results for wastewater effluents indicated that using activated clay (bentonite) as a
coagulant with an optimum removal and maximum surface area for acid activation attained
at 5M concentration of sulphuric acid used for activation of clay. The combinations of 5M
bentonite clay to ZINPs (zero valent iron nano particles), in a mass ratio of 99:1 respectively,
reduced ammonia up to 96.85% with a dosage of 61.6mg coagulant, a reduction from the
raw water 277mg/L to 8.71mg/L. Most of the sample pH ranged from 6.5 to 9 as required by
the Department of Water Affairs and Forestry. The samples’ conductivities were below the
standard 2500μs/cm; the 5M+ZVINPs at 60.1mg had a conductivity of 259μs/cm. Hence,
this treatment is not only effective and economical, but also ecologically acceptable.
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Investigation of the mechanical properties and behaviour of hybrid polymer composites embedded with shape memory alloysAyodele, Olukayode Lawrence January 2008 (has links)
Thesis submitted in fulfilment of the requirements for the degree
Magister Technologiae: Mechanical Engineering
in the Faculty of Engineering
at the Cape Peninsula University of Technology
2008 / The increasing requirement for light weight constructions and the unsatisfactory performances of
traditional metals and conventional engineering materials, especially in their failure to positively
respond to environmental stimuli, in a demanding environment have made the search for the
development of alternative materials inevitable. Such alternative materials being sought, which
are the so-called adaptive, multifunctional, smart or intelligent composites would facilitate the
realization of some engineering applications that are simply difficult to achieve with the existing
conventional materials.
Composite materials have found increasing applications in construction, aerospace and
automotive industries due to their good characteristics of light weight, improved strength,
corrosion resistance, controlled anisotropic properties, and reduced manufacturing and
maintenance costs. However, there is a growing demand to improve on composite materials to
have “smart" capabilities so as to be able to sense, actuate and respond to the surrounding
environment.
Shape memory alloys (SMAs) are metallic alloys that can undergo martensitic phase
transformations as a result of applied thermomechanical loads and are capable of recovering
permanent strains when heated above a certain transformation temperature. SMAs possess
sensing and actuating functions and have the potential to control the mechanical properties and
responses of their hosts due to their inherent unique characteristics: shape memory effect (SME)
and pseudoelasticity. When integrated into structural components, they perform sensing,
diagnosing, actuating and repair or healing functions, thereby enhancing improved performance
characteristics of their hosts. Amongst the commercially available SMAs, NiTi (Nickel-Titanium)
alloys in forms of wires, ribbons, bars, particles and porous bulks are the most widely used
because of their excellent mechanical properties and superior material characteristics.
Embedding SMAs into composite materials can create smart or intelligent hybridized
composites.
This thesis details an investigation of the mechanical properties and behaviour of the hybridized
composites formed by embedding NiTi SMA wires into 60D polyurethane. The composites were
produced by the vacuum process of manufacturing. The properties of the implanted SMA wires
were enhanced by ageing and pre-straining. Uniaxial tensile and four point bending tests were
conducted to ascertain the significance of embedding SMA wires into the polyurethane host
matrix. It was found that the embedded SMA results in an increasing in elastic modulus, tensile
strength and bending stiffness. It was found that these improvements in the properties can not
be sustained at high temperature owing to degradation of interfacial strength between the SMA
and polyurethane as a result of the high recovery stress generated by the SMA upon activation.
Some measures that can ameliorate the interfacial breakdown were suggested.
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Numerical and experimental investigation of directional solidification in vacuum investment casting of superalloysRzyankina, Ekaterina January 2013 (has links)
Thesis submitted in fulfilment of the requirements for the degree
Master of Technology: Mechanical Engineering
in the Faculty of Engineering
at the Cape Peninsula University of Technology
2013 / High temperatures encountered in combustion chambers of jet engines has demanded the creation of new technologies and new materials for the construction of one of the most critical elements of these systems - the stator and rotor turbine blades. They have to withstand extreme temperatures for extended periods without the loss of mechanical strength, conditions under which many steels and alloys fail. Such failure is ascribed to the combination of high temperatures and high centrifugal forces, resulting in creep.
The high temperature creep mechanism of grain boundary sliding has limited the operation capability of fine-grained equiaxed castings. Higher operating temperatures were achieved with higher alloy contents and coarse-grained equiaxed castings. This is especially prevalent in multi-crystalline structures in which grain boundaries present weaknesses in the structure. However, notwithstanding these improvements, high temperature resistant alloys formed as single crystal structures offer the necessary material properties for safe performance under these extreme conditions.
Damage to turbine blade surfaces is often caused by oxidation and hot corrosion. For this reason, turbine blades are coated with a thermal barrier coating (TBC), which consists of ceramic materials that reduce the heat flux through the airfoil.
In this research work, modelling and simulation techniques were initially used to study the directional solidification (DS) of crystal structures during vacuum investment casting. The modelling of the solidification process was implemented using a Finite Element casting simulation software, ProCAST, to predict thermal and flow profiles.
These models allowed the study of the dendritic growth rate, the formation of new grains ahead of the solid/liquid interface and the morphology of the dendritic microstructure. These studies indicated the opportunity to optimise the velocity of the solidification front (solidification rate) for single crystal structures.
The aim of this research was therefore to investigate the effect of the solidification rate (or withdrawal velocity) on the quality of SC castings. The investigations were carried out for nickel-based superalloy CMSX-4 turbine blade casts and rods using the Bridgman process for vacuum investment casting. The SC castings were heat treated to improve the grain structure for enhanced creep resistance. The heat treated SC castings were inspected by X-ray diffraction to analyse crystallographic orientation and chemical composition; and by SEM,
OP (optical microscopy) and microprobe analysis to analyse the microstructure; in addition to macrostructural investigations.
In the experimental analysis, the formation of new grains ahead of the solidi/liquid interface and the effect of dendrite packing patterns on the primary dendrite spacing were investigated.
Creep tests were conducted to compare the creep properties of the SC castings for different withdrawal rates, and to draw conclusions regarding the effect of withdrawal rate on the microstructure (and hence the creep properties) of SC castings.
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Search engine exclusion policies: implications on indexing e-commerce websitesMbikiwa, Fernie Neo January 2005 (has links)
THESIS
Submitted in fulfilment
of the requirements for the degree
MAGISTER TECHNOLOGIAE
in
INFORMATION TECHNOLOGY
in the
FACULTY OF BUSINESS INFORMATICS
at the
CAPE PENINSULA UNIVERSITY OF TECHNOLOGY
2005 / The aim of this research was to determine how search engine exclusion
policies and spam affect the indexing of e-Commerce websites. The Internet
has brought along new ways of doing business. The unexpected growth of
the World Wide Web made it essential for firms to adopt e-commerce as a
means of obtaining a competitive edge. The introduction of e-commerce in
turn facilitated the breaking down of physical barriers that were evident in
traditional business operations.
It is important for e-commerce websites to attract visitors, otherwise the
website content is irrelevant. Websites can be accessed through the use of
search engines, and it is estimated that 88% of users start with search
engines when completing tasks on the web. This has resulted in web
designers aiming to have their websites appear in the top ten search engine
result list, as a high placement of websites in search engines is one of the
strongest contributors to a commercial website’s success.
To achieve such high rankings, web designers often adopt Search Engine
Optimization (SEO) practices. Some of these practices invariably culminate in
undeserving websites achieving top rankings. It is not clear how these SEO
practices are viewed by search engines, as some practices that are deemed
unacceptable by certain search engines are accepted by others. Furthermore,
there are no clear standards for assessing what is considered good or bad
SEO practices. This confuses web designers in determining what is spam,
resulting in the amount of search engine spam having increased over time,
impacting adversely on search engine results.
From the literature reviewed in this thesis, as well as the policies of five top
search engines (Google, Yahoo!, AskJeeves, AltaVista, and Ananzi), this
author was able to compile a list of what is generally considered as spam.
Furthermore, 47 e-commerce websites were analysed to determine if they
contain any form of spam. The five major search engines indexed some of
these websites. This enabled the author to determine to what extent search
engines adhere to their policies. This analysis returned two major findings. A
small amount of websites contained spam, and from the pre-compiled list of
spam tactics, only two were identified in the websites, namely keyword
stuffing and page redirects. Of the total number of websites analysed, it was
found that 21.3% of the websites contained spam.
From these findings, the research contained in this thesis concluded that
search engines adhere to their own policies, but lack stringent controls for the
majority of websites that contained spam, and were still listed by search
engines. In this study, the author only analysed e-commerce websites, and
cannot therefore generalise the results to other websites outside ecommerce.
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Software developer competency frameworkMinani, David Muhangwa January 2013 (has links)
Thesis submitted in fulfilment of the requirements for the degree
Master of Technology: Information Technology
in the Faculty of Informatics and Design
at the Cape Peninsula University of Technology
2013 / The application of software systems in business organizations continue to increase as the Internet technology grows. Business processes that previously required manual interventions are becoming automated using software systems. The use of software systems is fundamental to electronic processing of business transactions. More business organizations, large and small, are utilizing information technology in order to have competitive advantage in the business arena. Software is ubiquitous. Among areas where software plays core roles are e-Banking where software systems are used to process banking transactions, e-Health where software systems are used to facilitate activities in the health sector, e-Commerce where software systems are used to facilitate online business transactions, e-Government where software system are used to facilitate government activities and e-Learning where software systems are used to facilitate the teaching and learning process.
Nevertheless, the large number of failing software projects and the increase in software security problems coupled with shortage of skilled software developers are still major obstacles in the software development industry. Among others, the solution can be achieved by improving the competency of software developers so that software systems developed are of good quality, safe, robust, and support business objectives. Software companies and business organizations stand a big chance to increase their return on investment (ROI), if competencies of software developers are improved. A software developer plays critical roles in software development projects. A software developer, however, requires specific skills and knowledge in order to develop software systems that solve problems and deliver solutions.
This research is about competencies of software developers. The research focuses on software development activities performed by software companies and business organizations within the Western Cape Province. The unit of analysis is software developers. Data pertaining to tasks performed by software developers, tools used by software developers and skills required were collected, examined and analysed. The objective of the research is to develop a competency framework for software developers. It can be used by institutions and the industry to provide better education. Most importantly, the industry will have access to competent software developers who can perform their job well. As justified in this research, knowledge of a competency framework for software developers is extremely essential.ÿ
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