Thesis (PhD)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: Organisations attempt to select employees that will make an effective contribution towards organisational performance. Traditionally, the emphasis was on selecting new staff on the basis of cognitive and behavioural attributes, which are linked to positive constructs such as technical competence, involvement, commitment and productivity. More recently, the domain of staff selection has widened to include the selection of individuals who would avoid counterproductive work behaviours. Based on previous studies, this study investigated the three most dominant constructs in this domain, i.e. personality, integrity and counterproductive work behaviour. The goal of this study was to investigate the relationship between selected personality dimensions and integrity, and how these personality dimensions and integrity are related to counterproductive work behaviour. Based on the existing literature, a theoretical model depicting how these constructs are related to one another was developed and a number of hypotheses were formulated. The data for this study were obtained via questionnaires from a non-probability sample in the South African retail and security industries. The total sample size consisted of 1176 non-managerial employees and job applicants. The postulated relationships were empirically tested using various statistical methods. Reliability analyses were done on all the measurement scales and adequate reliability was found. The content and structure of the measured constructs were investigated by means of confirmatory, and where necessary, exploratory factor analyses. The results indicated that reasonable fit was achieved for all the refined measurement models. Subsequently, Structural Equation Modelling (SEM) was used to determine the extent to which the conceptual model fitted the data obtained from the sample and to test the relationships between the constructs. In line with previous research, the results indicated positive relationships between conscientiousness and integrity, and adjustment and integrity. Negative relationships between neuroticism and integrity and fearfulness and integrity were found. Contrary to the literature, agreeableness showed a negative relationship with integrity and external locus of control and personalised power showed non-significant relationships with integrity. In line with the literature, positive relationships were found between neuroticism and counterproductive work behaviour, external locus of control and counterproductive work behaviour, personalised power and counterproductive behaviour. Negative relationships were found between conscientiousness and counterproductive work behaviour, and integrity and counterproductive work behaviour. Contrary to the literature, positive relationships were found between adjustment and counterproductive work behaviour, and agreeableness and fearfulness showed non-significant relationships with counterproductive work behaviour. The present study contributes meaningfully to existing literature on personality, integrity and counterproductive work behaviour by providing insights into the nature of the relationships amongst these constructs. The study also specifies practical implications to be considered by management in order to enhance integrity behaviour and to reduce counterproductive behaviour in organisations. The limitations and recommendations provide additional insights and opportunities to be explored through future studies. / AFRIKAANSE OPSOMMING: Organisasies poog om werknemers aan te stel wat ‘n doeltreffende bydrae tot organisatoriese werkverrigting sal lewer. Voorheen was die klem hoofsaaklik op die keuring van personeel aan die hand van positiewe konstrukte soos vakkundige bedrewenheid, sowel as kognitiewe en gedragseienskappe, byvoorbeeld betrokkenheid, verbondenheid en produktiwiteit. Die fokusgebied van personeelkeuring het egter onlangs verder uitgebrei sodat teen-produktiewe werksgedrag as ‘n bykomende konstruk ingesluit is. Hierdie studie fokus op die drie mees prominente konstrukte op hierdie terrein, naamlik persoonlikheid, integriteit en teen-produktiewe werksgedrag. Die doel van hierdie studie was om die verwantskap tussen bepaalde persoonlikheidsfaktore en integriteit te ondersoek en vas te stel hoe die gekose persoonlikheidsfaktore en integriteit met teen-produktiewe werksgedrag verband hou. ‘n Teoretiese model wat aandui hoe die verskillende konstrukte met mekaar verband hou, is op grond van die bevindings wat in bestaande literatuur vervat is, ontwikkel. Verskeie hipoteses is geformuleer. Die data vir hierdie studie is deur middel van vraelyste ingesamel. ‘n Nie-waarskynlikheidsteekproef in die Suid-Afrikaanse kleinhandel- en veiligheidsektore is gebruik. Die totale steekproef het bestaan uit 1176 persone in nie-bestuursposte asook werkaansoekers. Die gepostuleerde verwantskappe en die konseptuele model is empiries met behulp van verskeie statistiese metodes getoets. Betroubaarheidsontleding van die relevante meetinstrumente is gedoen en voldoende betroubaarheid is gevind. Die inhoud sowel as die struktuur van die konstrukte is ontleed aan die hand van bevestigende en, waar nodig, verkennende faktorontleding. Die resultate het redelike goeie passings vir al die hersiene metingsmodelle getoon. Vervolgens is Struktuur-Vergelykings-Modellering (SVM) aangewend om te bepaal in hoeverre die konseptuele model die data pas, en om die verwantskappe tussen die verskillende konstrukte te toets. Ooreenkomstig vorige navorsing is positiewe verwantskappe gevind tussen toegewydheid en integriteit, en tussen aanpassing en integriteit; negatiewe verwantskappe tussen neurotisisme en integriteit, en vrees en integriteit; positiewe verwantskappe tussen neurotisisme en teen-produktiewe werksgedrag, eksterne lokus van kontrole en teen-produktiewe werksgedrag; verpersoonlikte mag en teen-produktiewe werksgedrag; negatiewe verwantskappe tussen toegewydheid en teen-produktiewe werksgedrag, en integriteit en teen-produktiewe werksgedrag. Teenstrydig met vorige navorsing is ‘n negatiewe verwantskap gevind tussen inskiklikheid en integriteit. Ook teenstrydig met vorige navorsing is onbeduidende verwantskappe gevind tussen inskiklikheid en teen-produktiewe werksgedrag, eksterne lokus van kontrole sowel as verpersoonlikte mag en integriteit, asook tussen inskiklikheid, vrees, en teen-produktiewe werksgedrag, en aanpassing en teen-produktiewe werksgedrag. Hierdie studie vul die bestaande literatuur aan ten opsigte van persoonlikheid, integriteit en teen-produktiewe werksgedrag deurdat dit insig verskaf betreffende die aard van die verband tussen hierdie konstrukte. Die studie noem ook praktiese implikasies wat deur bestuur oorweeg kan word om bestuurspraktyke te verbeter ten einde integriteitsgedrag te verhoog, asook teen-produktiewe werksgedrag te verminder. Die beperkings van die studie wat uitgelig word en aanbevelings wat gemaak word, verskaf bykomende insig en moontlikhede wat in toekomstige navorsing ondersoek kan word.

This thesis is about a potential trade-off between integrity and long-term usability in the choice of file formats for preservation of text documents. Five common formats are discussed: plain text, PDF/A, Office Open XML Document, Open Document Text, and Markdown. The formats are compared with respect to four criteria related to integrity and usability and to the records continuum model: support by widely used software, stability, rendering of contents and reusability. It is concluded that no single format is optimal with respect to all four criteria, when it comes to preserving typical documents in a modern environment, with more or less complex formatting and document structure. Therefore, the feasiblity of using two or more formats for preservation of a single document (e.g. PDF/A combined with Markdown and/or Office Open XML) is discussed. It is necessary to weigh the importance of integrity and long-term usability against the costs of preserving documents in multiple formats. This is a two years master's thesis in Archival Science, Library and Museum studies.

The functional performance of joint implants is largely determined by the surface layer properties in contact. Wear/debris-induced osteolysis and aseptic loosening has been identified as the major cause of failure of metal-on-metal joint implants. A crucial requirement for the long-term stability of the artificial joint is to minimize the release of debris particles. Severe plastic deformation (SPD) processes have been used to modify the surface integrity properties by generating ultrafine, or even nano-sized grains and grain size gradients in the surface region of many materials. These fine grained materials often exhibit enhanced surface integrity properties and improved functional performance (wear resistance, corrosion resistance, fatigue life, etc.) compared with their conventional coarse grained counterparts. The aim of the present work is to investigate the effect of a SPD process, cryogenic burnishing, on the surface integrity modifications of a Co-Cr-Mo alloy, and the resulting wear performance of this alloy due to the burnishing-induced surface integrity properties. A systematic experimental study was conducted to investigate the influence of different burnishing parameters on distribution of grain size, phase structure and residual stresses of the processed material. The wear performance of the processed Co-Cr-Mo alloy was tested via pin-on-disk wear tests. The results from this work show that the cryogenic burnishing can significant improve the surface integrity of the Co-Cr-Mo alloy which would finally lead to advanced wear performance due to refined microstructure, high hardness, compressive residual stresses and favorable phase structure on the surface layer. A finite element model (FEM) was developed for predicting the grain size changes during burnishing of Co-Cr-Mo alloy under both dry and cryogenic conditions. A new material model was used for incorporating flow stress softening and associated grain size refinement caused by the dynamic recrystallization (DRX). The new material model was implemented in a commercial FEM software as a customized user subroutine. Good agreement between predictions and experimental observations was achieved. Encouraging trends are revealed with great potential for application in industry.

<p>My analysis consists of an in-depth study of the experience of a group of development programme participants who were exposed to the use of art and artistic work in organisation and leadership development, resulting in positive effects. My starting point is creativity as a concept according to paediatrician and psychoanalyst DW Winnicott who stresses how important playing and creativity is for us, even as an adult, for us to utilise our full potential. He believes that we have a psychological space – a crossover area – where the outer, objective reality and the inner, subjective reality meet. Playing, creative development and experiences occur in this space. The purpose of my paper is to investigate art and artistic creation to determine if it can be used in the work environment as a means to provide individuals access to the crossover space, thereby developing creativity and the creative power.</p><p>Risks have also been addressed within my paper. Art and culture can be brought down to a level where its use is only justifiable in those instances where value and economic benefits can be shown. In my opinion, this risk must be taken seriously. This does not mean, however, that one should not work across borders. This is about letting art and culture provide value in the leadership and organisation development by concurrently complementing logical and rationale methods, plans, and decision-making with the goal of striving to maintain the integrity and autonomy of the artistic endeavours.</p>

The development of modern digital communication systems has been entered a new era with faster signal transmission and processing capability, called high-speed circuit systems. As their clock frequencies have increased and rise times of signals have decreased, the signal integrity of interconnects in the packaging and printed circuit boards plays a more and more important role. In high-speed circuit systems, the well-designed logic functions most likely will not work well if their interconnects are not taken into account.This dissertation addresses to profoundly understand the signal integrity knowledge, be proficient in calculation, simulation and measurements, and be capable of solving related signal integrity problems. The research mainly emphasizes on three aspects. First of all, the impact of on-wafer calibration methods on the measured results of coplanar waveguide circuits is comprehensively investigated, with their measurement repeatability and accuracy. Furthermore, a method is presented to characterize the physically-consistent broadband material properties for both rigid and flexible dielectric materials. Last but not least, a hybrid method for efficient modeling of three dimensional via structures is developed, in order to simplify the traditional 3D full-length via simulations and dramatically reduce the via build and simulation time and complexity.

With the growing popularity of e-commerce applications that use software agents, the protection of mobile agent data has become imperative. To that end, the performance of four methods that protect the data integrity of mobile agents is evaluated. The methods investigated include existing approaches known as the Partial Result Authentication Codes, Hash Chaining, and Set Authentication Code methods, and a technique of our own design, called the Modified Set Authentication Code method, which addresses the limitations of the Set Authentication Code method. The experiments were run using the DADS agent system (developed at the Network Research Laboratory at UNT), for which a Data Integrity Module was designed. The experimental results show that our Modified Set Authentication Code technique performed comparably to the Set Authentication Code method.

Motor coaches are an integral part of the transportation system. It was observed that occupant fatalities and serious injuries occur in rollover more frequently than in any other type of accidents for these vehicles. Several regulations such as Economic Commission for Europe Regulation 66 (ECE R66) are issued to minimize the catastrophic consequences of rollover accidents. Passing “Motorcoach safety plan” which is based on a complete vehicle rollover test of ECE R66 will be mandatory in North America in the near future. However, the cost of a single physical test encourages researchers to perform numerical simulations prior to a complete vehicle rollover test. In this thesis, the integrity of a coach seat and the effects of different restraint configurations on the safety of passengers in rollover are numerically studied. To perform this research, a new modeling approach, which is computationally effective and highly suitable for parametric studies, is proposed. Firstly, a detailed model of two seats of a coach is developed and validated against experimental results. Anthropomorphic Test Devices are then introduced to the model and acceleration history of a physical rollover test is imposed on the system. The model is solved using non-linear explicit dynamic Finite Element code LS-DYNA®. Injury criteria values are extracted and compared to the experimental results. An acceptable level of correlation is achieved that confirms the validity of the model and the reliability of the modeling approach. The integrity of the seat in a rollover is analyzed showing the necessity of an anchorage test prior to a whole coach rollover test. The results of a parametric study on the safety of passengers reveal the high probability of partial ejection if the retractor does not lock properly in a rollover. It is also shown that the safety of occupants can be improved if retractor pretensioners be introduced to coaches. / February 2017

One of the main problems that affect the data integrity of passive RFID systems is the collision between the tags. A popular anticollision algorithm which dominates the standards in HF and UHF passive RFID systems is Framed Slotted Aloha (FSA) and some variations of FSA. Throughput and Average time delay of the RFID system which determines the performance/efficiency of the system are reduced rapidly when the number of tags inside the interrogation zone is increased. Using larger frame sizes is not always the solution. This thesis discusses and compares the existing protocols, and proposes a variation of FSA, called Progressing Scanning (PS) algorithm. The PS algorithm divides the tags in the interrogation zone into smaller groups, and gives the ability to the reader to communicate each time with one of them. For performance analysis, the PS algorithm was evaluated with the parameters of a typical passive RFID system at 2.45 GHz . The results showed that the PS algorithm can improve the efficiency of the RFID system and provide a reliable solution for cases with a high density of tags in the area (over 800 tags ).

Objective: Understanding the pathways through which treatments work to change symptom and diagnostic outcomes is important to the development and delivery of evidence-based treatments. This study assessed the extent to which adherence (therapist’s delivery of prescribed therapeutic interventions) and differentiation (therapist’s delivery of non-prescribed therapeutic interventions) to Coping Cat, a CBT program, affected client symptom and diagnostic outcomes. Method: The Therapy Process Observational Coding System for Child Psychotherapy – Revised Strategies Scale (McLeod et al., 2015) was used to characterize therapeutic interventions delivered within and outside of the Coping Cat program with youths aged 7-15 receiving treatment in one efficacy (n = 51; 41% female; 84% Caucasian, M age = 10.37) and one effectiveness (n = 17; 56% female, 39% Caucasian, M age = 10.90) trial. Youth- and parent-report symptom checklists and diagnostic interviews were used to assess symptom and diagnostic remission. Multiple hierarchical regression analyses and hierarchical binomial logistic regression were used to investigate the relation between adherence and differentiation and symptom change and remission of principal diagnosis. Results: Neither adherence nor differentiation were significantly related to symptom or diagnostic outcomes. No clear trend emerged, and results were inconsistent across parent and youth report, outcome type, and setting. Conclusion: These results are consistent with past literature. Two interpretations exist: (1) that there is no relation between treatment delivery and outcomes, and (2) that methodological and analytic flaws undercut the ability of the analyses to identify a relation.

Résumé confidentiel / Confidential abstract