The purpose of this study was to explore and highlight positive psychological strengths that are required and, to a lesser extent, negative psychological factors that are to be eliminated in employees attending EAP in the public service in order to make the EAP beneficial and successful. EAPs in the public service have not been as successful as expected because employees drop-out prematurely and/or benefit minimally from attending their sessions. Through the use of a qualitative research approach, this study explored positive psychological strengths that played a significant role in assisting employees attending EAP to achieve their health goals. Research data was collected through the narratives and in-depth interviews from eight participants, who shared their EAP experiences with the researcher. The collected data was analysed through the use of content analysis and positive psychological strengths in the form of themes emerged. The themes were compared with the framework of positive psychology, which is known as the VIA classification system of strengths and virtues framework, in order to determine alignment or compatibility with it. In addition, a few negative emotions were also reported as having been experienced by the participants while attending EAP. The results of this study indicate that certain positive psychological strengths possessed by employees while attending EAP contributed significantly in making them benefit from their EAP consultations. Although a few negative emotions were also reported as having being present during the EAP consultation, they did not affect the progression and success of the EAP. An EAP intervention model is recommended herein for future use, in order to facilitate the success of EAP sessions. / Psychology / D. Litt. et Phil. (Psychology)

The purpose of this study was to explore and highlight positive psychological strengths that are required and, to a lesser extent, negative psychological factors that are to be eliminated in employees attending EAP in the public service in order to make the EAP beneficial and successful. EAPs in the public service have not been as successful as expected because employees drop-out prematurely and/or benefit minimally from attending their sessions. Through the use of a qualitative research approach, this study explored positive psychological strengths that played a significant role in assisting employees attending EAP to achieve their health goals. Research data was collected through the narratives and in-depth interviews from eight participants, who shared their EAP experiences with the researcher. The collected data was analysed through the use of content analysis and positive psychological strengths in the form of themes emerged. The themes were compared with the framework of positive psychology, which is known as the VIA classification system of strengths and virtues framework, in order to determine alignment or compatibility with it. In addition, a few negative emotions were also reported as having been experienced by the participants while attending EAP. The results of this study indicate that certain positive psychological strengths possessed by employees while attending EAP contributed significantly in making them benefit from their EAP consultations. Although a few negative emotions were also reported as having being present during the EAP consultation, they did not affect the progression and success of the EAP. An EAP intervention model is recommended herein for future use, in order to facilitate the success of EAP sessions. / Psychology / D. Litt. et Phil. (Psychology)

In this study, the intersections between Equine Assisted Psychotherapeutic interventions and adolescence are explored. Equine Assisted therapeutic work has recently gained much popularity in the field of psychology, due to many reported benefits, which include the value of the use of the horse as a tool in psychotherapy. Adolescence is acknowledged to be a difficult transitional phase, punctuated with many challenges, such as identity development. As this study is conducted by a trainee psychotherapist and researcher, the work also contains a reflexive exploration of these fields, with personal reflections regarding the researcher‟s own experience in the fields. This study is framed as a transtheoretical bricolage, which includes elements of reflexivity, heuristics, transpersonal, and phenomenological research approaches. Data was gathered from individual interviews with co-researchers, focus group interviews, personal reflections, and inclusion of non-verbal information from the horses who formed part of this study. Data analysis was done by means of a Thematic Data Analysis. The research findings reflect themes on different levels, which are: content themes, process themes, meta-reflections on the research process, and a meta-analysis of the research and individual developmental process which took place in the production of this work / Psychology / M.A. (Clinical Psychology)

This thesis research is concerned with the exploration, design, and validation of novel haptic technologies and signals that feel natural and meaningful in a calm and pleasant way. Our ultimate goal is to expand the possibilities of human-machine interaction by developing a single tactile display and a set of signals through a systematic design approach. It is generally a challenge to evoke a broad range of emotions with vibrotactile stimulation, especially at low signal intensities. During the first part of this thesis research, three types of prototypes were developed and explored using novel haptic technologies. The first was a circular array braille display consisting of eight small six-pin braille modules. The forty-eight pins were arranged in a circular shape to deliver circular tactile information such as time and direction. The second was a braille stick consisting of sixteen six-pin braille modules arranged in a row. The entire display could be easily grasped in the hand so that tactile information can be easily accessible. The third was a 3-by-3 electroactive polymer actuator array driven at high voltages that gives a subtle “tapping” feel on the skin. However, each of the three prototypes suffered from a limited range of expression and was not pursued further.<br> After the initial prototyping efforts, a 2-by-2 vibrotactile display, the palmScape, was conceived and developed. Custom-designed stimulation patterns based on natural phenomena that feel calm and pleasant were designed and implemented with the palmScape. We use text labels to set the context for the vibrotactile icons that attempt to capture and expresses natural metaphors through variations in signal amplitude, frequency, duration, rhythm, modulation, spatial extent, as well as slow movements. Fourteen participants evaluated twenty vibrotactile icons by rating the perceived valence and arousal levels. The twenty stimuli included sixteen custom-designed vibrotactile icons from this thesis research and four reference patterns from two published studies. The results show that our custom-designed patterns were rated at higher valence levels than the corresponding reference signals at similar arousal ratings. Five of the sixteen vibrotactile icons from this research occupied the fourth quadrant of the valence-arousal space that corresponds to calm and pleasant signals. These findings support the validity of the palmScape display and our signal design approach for achieving a calm and pleasant experience and the possibility of reaching a broader range of expressiveness with vibrotactile signals.<br> Future studies will continue with the design of signals that can express a broader range of metaphors and emotions through the palmScape, and build an emotional evaluation database that can be combined with other modalities. Our work can be further expanded to support an immersive experience with naturalistic-feeling vibrotactile effects and broaden the expressiveness of human-computer interfaces in media consumption, gaming, and other communicative application domains.

Dielectric elastomer actuators (DEAs) have been used for artificial muscles for years. Recently the DEA-based deformable surfaces have demonstrated controllable microscale roughness, ease of operation, fast response, and possibilities for programmable control. DEA muscles used in bioinspired robotic arms for large deformation and strong force also become desirable for their efficiency, low manufacturing cost, high force-to-weight ratio, and noiseless operation. The DEA-based responsive surfaces in microscale roughness control, however, exhibit limited durability due to irreversible dielectric breakdown. Lowering device voltage to avoid this issue is hindered by an inadequate understanding of the electrically-induced wrinkling deformation as a function of the deformable dielectric film thickness. Also, the programmable control and geometric analysis of the structured surface deformation have not yet been fully explored. Current methods to generate anisotropic wrinkles rely on mechanical pre-loading such as stretching or bending, which complicates the fabrication and operation of the devices. With a fixed mechanical pre-loading, the device can only switch between the flat state and the preset wrinkling state. In this thesis, we overcome these shortcomings by demonstrating a simple method for fabricating fault-tolerant electro-responsive surfaces and for controlling surface wrinkling patterns. The DEA-based system can produce different reversible surface topographies (craters, irregular wrinkles, structured wrinkles) upon the geometrical design of electrode and application of voltage. It remains functional due to its ability to self-insulate breakdown faults even after multiple high voltage breakdowns, and the induced breakdown punctures can be used for amplification of local electric fields for wrinkle formation at lower applied voltages. We enhance fundamental understanding of the system by using different analytical models combined with numerical simulation to discuss the mechanism and critical conditions for wrinkle formation, and compare it with the experimental results from surface topography, critical field to induce wrinkles in films of different thickness, and wrinkling patterns quantitatively analysed by different disorder metrics. Based on the results, we demonstrate its wide applicability in adjustable transparency films, dynamic light-grating filter, molding for static surface patterns, and multi-stable mirror-diffusor-diffraction grating device. For DEAs used for macroscopic-scale deformation in robotic arms, the main issue that undermines the performance of DEA muscles is the trade-off between strong force and large displacement, which limits the durability and range of potential robotic and automation applications of DEA-driven devices. In this thesis, this challenge is tackled by using DEAs in loudspeaker configuration for independent scaling-up of force and displacement, developing a theoretical prediction to optimise the operation of such DEAs in bioinspired antagonistic system to maximise speed and power of the robotic arm, and designing a clutch-gear-shaft mechanical system collaborating with the muscles to decouple the displacement and output force. Therefore, the trade-off between force and displacement in traditional DEA muscles can be resolved. The mechanical system can also convert the short linear spurt to an unlimited rotary motion. Combining these advantages, continuous movement with high output force can be accomplished.

Authentication protocols are used for two parties to authenticate each other and build a secure channel over wired or wireless public channels. However, the present standards of authentication protocols are either insufficiently secure or inefficient for light weight devices. Therefore, we propose two authentication protocols for improving the security and user efficiency in wired and wireless environments, respectively. Traditionally, TLS/SSL is the standard of authentication and key exchange protocols in wired Internet. It is known that the security of TLS/SSL is not enough due to all sorts of client side attacks. To amend the client side security, multi-factor authentication is an effective solution. However, this solution brings about the issue of biometric privacy which raises public concern of revealing biometric data to an authentication server. Therefore, we propose a truly three factor authentication protocol, where the authentication server can verify their biometric data without the knowledge of users¡¦ templates and samples. In the major wireless technologies, extensible Authentication Protocol (EAP) is an authentication framework widely used in IEEE 802.11 WLANs. Authentication mechanisms built on EAP are called EAP methods. The requirements for EAP methods in WLANs authentication have been defined in RFC 4017. To achieve user efficiency and robust security, lightweight computation and forward secrecy, excluded in RFC 4017, are desired in WLAN authentication. However, all EAP methods and authentication protocols designed for WLANs so far do not satisfy all of the above properties. We will present a complete EAP method that utilizes stored secrets and passwords to verify users so that it can (1) meet the requirements of RFC 4017, (2) provide lightweight computation, and (3) allow for forward secrecy. In order to prove our proposed protocols completely, we apply two different models to examine their security properties: Bellare¡¦s model, a standard reduction based on computational model, that reduces the security properties to the computationally hard problems and the OFMC/AVISPA tool, a model checking approach based on formal model, that uses the concept of the search tree to systematically find the weaknesses of a protocol. Through adopting Bellare¡¦s model and OFMC/AVISPA tool, the security of our work is firmly established.

Academic writing is generally regarded as the most important communication medium through which people in the tertiary academic context choose to communicate their ideas. It is also well known that it is sometimes an arduous process for students to become accustomed to the requirements (the conventions and conditions) that hold for the production of appropriate written texts in this context. The initial impetus for the current study was provided by what appeared to be a significant problem that some supervisors at the University of Pretoria identified in terms of the academic writing ability of their postgraduate students. This study therefore investigates postgraduate academic writing with regard to a number of such issues, and does so within the broader confines of academic literacy. The ultimate purpose of this investigation is to discover how writing interventions may be designed that offer appropriate assistance to students who experience difficulty with their writing. The study commences with an attempt to find support for treating 'academic discourse' as a potentially productive area of academic enquiry. It therefore presents an account on the nature of a 'discourse community', and attempts to ascertain whether there are any grounds on which 'academic discourse' may be regarded as a unique type of discourse used for specific communicative functions in the tertiary academic environment. It further discusses critically some of the traditional features of academic texts. The research then proposes thirteen design principles that serve as injunctions that should be considered in the development of writing courses, and proceeds to a critical discussion of the most important approaches in the teaching and learning of writing. What is evident from this discussion is that none of the historical approaches will, on their own, enable one to design justifiable writing courses. As a result, an eclectic approach is required in order to integrate the strengths of these approaches into a strategy for writing course design that is theoretically and practically justifiable. Subsequently, the critical interpretation of the literature in the first part of the study is used in the design of a framework for writing course design in tertiary education. This framework consists of six focuses that stand in a relationship of dynamic interaction towards a description of the context in which tertiary students write. Thus, relevant aspects concerning the writer, text, reader, institutional context and one's approach to writing are all essential elements that should be carefully considered in terms of their potential influence on the eventual design of materials that will constitute a writing course. The rest of the study consists of an application of the proposed framework that addresses firstly, the perceptions of supervisors at the University about the academic literacy ability of their postgraduate students, as well as their requirements for academic writing. It then proceeds to an investigation of a specific group of students' (from the Faculty of Natural and Agricultural Sciences) perceptions about their own academic literacy ability and a determination of their perceptions and expectations of academic writing at university. Because the information that was collected (by means of questionnaires) in both cases mentioned above is mainly perceptual in nature, it was considered essential to determine the academic literacy ability of students in the study group by means of a reliable testing instrument. A written text that these same students produced was further analysed in order to establish possible writing difficulties they experienced. In addition, it was important to confirm certain findings from the supervisor questionnaire, and more specific information had to be collected on particular writing issues that could inform discipline specific writing course design (this was accomplished through focus group interviews with supervisors of the School of Agricultural and Food Sciences). A combination of all the prominent findings of the empirical work mentioned above, as well as insights gained in the literature survey, is then used to make justifiable suggestions for the design of writing course materials for students in the study group. Finally, a number of issues were identified that could not be addressed by this study and, therefore, suggestions are made for future research that may investigate these matters. / Thesis (DPhil ( Linguistics))--University of Pretoria, 2007. / Unit for Academic Literacy / DPhil / Unrestricted

AFRIKAANS : Die navorsing is uitgevoer ten einde die aard en benutting van Personeelondersteuning- en Loopbaansentrum (POLS) se dienste aan die AID-personeel van die hoofkampus van UP, te verken en waar primêr gebruik gemaak was van ‘n kwantitatiewe navorsingsbenadering. Met die aanvang van die navorsingsprosedure was ‘n uitgebreide literatuurstudie oor verwante konsepte van WHPs en die universiteit as werkplek onderneem, gevolg deur empiriese navorsing deur die benutting van twee self-geadministreerde posvraelyste. Die eerste vraelys was aan geselekteerde AID-toesighouers en die tweede vraelys aan AID-werknemers ook geselekteer volgens die proporsioneel-gestratifiseerde steekproeftrekking, versprei. Daar was derhalwe deur middel van evaluerende navorsing ondersoek ingestel na werknemers en toesighouers se behoeftes en verwagtinge van die bestaande dienste, die mate van tevredenheid wat ervaar was en of hul deur die huidige dienste bereik word. Die behoefte aan ‘n volwaardige en gestruktureerde WHP vir UP was ook bepaal. Die studie het ‘n uitgebreide teoretiese deurskouing van die literatuur oor WHPs in die algemeen voorsien en aspekte soos die universiteit as werkplek, met spesifieke klem op die AID as werkplek, ondersoek en beskryf. Indien die literatuurstudie oor WHP in ag geneem word, blyk dit duidelik dat die dienste soos deur POLS gelewer, nie aan die standaarde en riglyne soos deur EAPA-SA gestel, voldoen nie. POLS voldoen op hierdie stadium ook nie aan ‘n tipiese WHP of Bedryfsmaatskaplike werk program nie, vanweë die lewering van beperkte dienste. Die literatuur het ook lig gewerp op die feit dat die WHP ten doel het om die organisasie se visie en missie te ondersteun. Die werksopset, organisasie dinamika en personeel diversiteit binne die Universiteit van Pretoria het dan ook aangedui dat die universiteit ‘n unieke werkgewer is en ook gebonde is tot die onderskrywing van verskeie wetgewing soos van toepassing op alle ander werkgewers. Die AID se missie, organisasiestruktuur, strategiese bestuur, fasiliteite en menslike hulpbronne dui daarop dat die AID nie van enige ander organisasie met betrekking tot werknemer en werkgewer verwagtinge verskil nie. Die literatuurstudie het aangedui dat die kern van WHPs gesetel is in ‘n doelgerigte en gestruktureerde program met die uitsluitlike doel om die werknemer se algehele maatskaplike funksionering te bevorder. Die empiriese navorsing het getoon dat POLS, as die Universiteit van Pretoria se hulpverleningsdiens, nie ten volle in die doel kon slaag nie. Die situasie kan grootliks toegeskryf word aan onkunde met betrekking tot POLS en gepaardgaande dienslewering asook die leemte aan doeltreffende bemarking deur POLS. Daar word derhalwe aanbeveel dat die Universiteit van Pretoria sterk oorweging skenk aan die ontwikkeling en implementering van ‘n volwaardige gestruktureerde werknemerhulpprogram, geskoei op die voorskrifte en beleid van EAPA-SA. ENGLISH : The research was performed to explore the nature and utilization of the Employee Assistance- and Career Centre's (EACC) services to the Academic Information Service (AIS) personnel on the main Campus of the University of Pretoria, and where a quantitative research approach was primarily used. With the commencement of the research procedure an extensive literature study about related concepts of EAP's and the University as a work place was undertaken, followed by empirical research through the usage of two self administered post questionnaires. The first questionnaire was sent to selected AIS-supervisors and the second questionnaire to the AIS-employees, also selected according to proportional stratified sampling procedure. An investigation was therefore done, through research evaluation, whether the employees and supervisors' needs and expectations of existing services, the extent of satisfaction experienced have been met and whether they are reached by the present services. The need for a full-fledged and structured EAP for UP was also determined. The study provided an extensive theoretical study of the literature on EAPs in general and surveyed and described aspects such as the university as work place, with specific emphasis on AIS as work place. Should the literature study on EAP be taken into account, it is evident that services provided by EACC, do not comply with standards and guidelines set by EAPA-SA. The EACC does not comply, at this stage, to a typical EAP or Occupational Social Work programme, because of the delivery of limited services. The literature also revealed the fact that EAPs purpose is to support the vision and mission of the organization. The work set-up, organization dynamics and personnel diversity with-in the University of Pretoria also indicated that the University is a unique employer who is also tied to the underwriting of several legislation applicable to all employers. The AIS's mission, organizational structure, strategical management, facilities and human resources, indicated that AIS do not differ from any other organization with regards to employee and employer expectations. The literature study indicated that the core of EAPs is settled in a purposeful and structured programme with the exclusive purpose to promote the employee's entire social well-being. The empirical study showed that the EACC, as employee assistance service of the University of Pretoria, could not reach the expected goals. This can be assigned to the lack of knowledge regarding EACC and their services, as well as the inefficient marketing by EACC. It is therefore recommended that the University of Pretoria should strongly consider a full-fledged Employee Assistance Programme based on the prescription and policies upheld by EAPA-SA. / Dissertation (MSD)--University of Pretoria, 2009. / Social Work and Criminology / unrestricted

In this study, the intersections between Equine Assisted Psychotherapeutic interventions and adolescence are explored. Equine Assisted therapeutic work has recently gained much popularity in the field of psychology, due to many reported benefits, which include the value of the use of the horse as a tool in psychotherapy. Adolescence is acknowledged to be a difficult transitional phase, punctuated with many challenges, such as identity development. As this study is conducted by a trainee psychotherapist and researcher, the work also contains a reflexive exploration of these fields, with personal reflections regarding the researcher‟s own experience in the fields. This study is framed as a transtheoretical bricolage, which includes elements of reflexivity, heuristics, transpersonal, and phenomenological research approaches. Data was gathered from individual interviews with co-researchers, focus group interviews, personal reflections, and inclusion of non-verbal information from the horses who formed part of this study. Data analysis was done by means of a Thematic Data Analysis. The research findings reflect themes on different levels, which are: content themes, process themes, meta-reflections on the research process, and a meta-analysis of the research and individual developmental process which took place in the production of this work / Psychology / M. A. (Clinical Psychology)

Thesis (Ph.D. (Social Work)) -- University of Limpopo, 2021 / An Emergency Medical Service (EMS) is considered one of the most stressful work environments. Copious literature has demonstrated that emergency service work has an undesirable impact on the health and wellbeing of personnel. In South Africa, research findings described that emergency services personnel are among the highest group of professionals at risk of suffering from job-related stress. In spite of the fact, previous studies have examined the association between critical incidents and Post Traumatic Stress Disorder (PTSD) symptoms including the psychological influence of trauma, a minority studies have explored the EMS personnel’s traumatic experiences and the subsequent coping strategies applied. This study sought to explore and describe the lived experiences of Emergency Medical Personnel in Capricorn District and to develop a user led model for mitigating occupational stress among EMS personnel. The principal aim of this study was achieved through the following objectives; to profile work related stress and the lived experiences of EMS personnel in Capricorn District, to Identify and appraise coping strategies employed by EMS personnel, to establish how accessible and user friendly EAP services are to EMS personnel, to determine the nature of social support (colleagues and supervisors) EMS personnel receive and to develop a user-led model for EMS personnel. This study was rooted in three theories, namely; trauma theory, resilience theory and the strengths perspective theory. The three theories were appropriate in this study to offer a perspective of situation and to analyse the situation under study to provide an understanding into the way in which EMS personnel make sense of their situation of the challenges they come across and make use of the available resources. The three theories interlaced together played a critical role in this study as they both align with building resilience, recognise individual’s innate strengths and coping in the face of hardship. Owing to the inimitability role of the emergency personnel and the services’ work context, the study adopted a qualitative approach. The purpose of the study was exploratory descriptive in nature. Exploring both their experience of critical incidents and the coping strategies employed by them to mitigate work-related stress and traumatic incidents from this qualitative perspective allowed the researcher to employ phenomenological research design for this study. A sample size of 21 emergency employees comprising 7 station managers and 14 EMS personnel) was obtained through purposive sampling technique. Thematic analysis was used to analyse data.  The findings suggest that life in the emergency field can possibly have an undesirable long-term effect on employees’ overall health and welfare and higher risk of PTSD. The distressing incidents were those in which the participants experienced feelings of vulnerability and had no control of the situations. The study established that emergency personnel find it most hard to deal with incidents involving children and colleagues. Emergency personnel suffer from emotional and physical stress owing to high job demands and repeated exposure to traumatic incidents. Regardless of the traumatic nature of emergency work and the inimitable role of emergency personnel, this study discovered that fact several stressors originate from organisational failure such lack of involvement in decision-making process, lack of training and shortage of staff. Unsupportive work environment, Lack of personal and job resources were found to be the extensive contributory factors to the job pressure experienced by which lead to compassion fatigue and exhaustion. It was also discovered the current EAP programme in the Department of Health (DoH) is not known and inaccessible to EMS personnel. The coping strategies utilised by emergency personnel were not adequate to prevent the aftermath of critical incidents. However collegial and social support from supervisors were found helpful in dealing with work-related stress. The study findings revealed that emergency personnel were unaware of the available support services within the DoH in Capricorn District. Collectively, the findings confirm that there is a need for an extensive marketing strategy of the EAP services and the user-led model which will be implemented by the organisation. The researcher recommends that EAP policies should form part of package given to new recruits during induction or orientation programme and diverse marketing strategies should be adopted to familiarise employees with EAP services available to them. The DoH should consider decentralisation of EAP services to enhance accessibility.