World-wide it is estimated that workers suffer 250 million accidents every year, with 330 000 fatalities. In South a c a , the fatality rate is 426 per annum. Sishen mine also experienced safety problems, namely a high injury rate, an average of one fatality per annum, and 85% of injuries being caused by risk behaviour. Furthermore, the safety culture at the mine was moderate. A proper safety management system requires continual attention to three domains, namely the environment (equipment, tools and housekeeping), the person (knowledge, skills, abilities, intelligence and personality), and behaviour. Sishen mine previously concentrated on the domains of environment and person, and virtually ignored safety behaviour. To correct this, Sishen mine adapted a behaviour based safety intervention programme. The aims of this research were to determine drivers that motivate safety and risk behaviour, to identify critical factors for the successful implementation of such a programme, and to determine if the safety culture and performance were affected by the implementation of a behaviour based safety intervention programme. A single-group non-experimental design was used. Questionnaires were used to conduct non-experimental surveys. The questionnaires addressed certain safety culture dimensions. A longitudinal survey was carried out before and after implementation of the behaviour based safety intervention programme. The results showed that the safety culture at the mine improved since implementation of the intervention programme. Management support for safety improved by 6%, peer support for safety by 13%, personal responsibility for safety by 7%, management systems by 6%, and employees actively caring for safety, by 3%. The improvement in safety culture also positively impacted on the injury rate at Sishen mine. Results indicated the following factors as being critical for a successful behaviour based safety implementation (in order of importance): participation, structured implementation, training, readiness for such a programme, communication, observation and feedback, target critical behaviours, flexibility, effective intervention actions, and data management. The study identified issues and challenges which must be dealt with, especially those applicable in developing countries like South Africa, with unique circumstances such as social and political diversity. The conclusion was that safety behaviour is mainly d i e d by activators, and motivated by consequences. The ABC model was identified as an important tool to analyse the drivers for safety behaviour in an effort to develop effective intervention actions. It is recommended that companies shift their focus from traditional safety approaches to the human dimension of safety. Thus, it is recommended that the behaviour based safety model must be applied by companies in order to focus on behaviour. Secondly, it is recommended that factors that are critical for a successful implementation must be identified and ranked in order of importance. The attention which is paid to each critical factor should then be related to its relative importance. It is also recommended that activators and consequences must be regarded as important drivers for safety behaviour when intervention actions are to be developed, and that the ABC technique should be applied in practice to analyse the appropriateness of the intervention actions. By way of conclusion, recommendations for future research are made. / Thesis (Ph.D. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2004.

World-wide it is estimated that workers suffer 250 million accidents every year, with 330 000 fatalities. In South a c a , the fatality rate is 426 per annum. Sishen mine also experienced safety problems, namely a high injury rate, an average of one fatality per annum, and 85% of injuries being caused by risk behaviour. Furthermore, the safety culture at the mine was moderate. A proper safety management system requires continual attention to three domains, namely the environment (equipment, tools and housekeeping), the person (knowledge, skills, abilities, intelligence and personality), and behaviour. Sishen mine previously concentrated on the domains of environment and person, and virtually ignored safety behaviour. To correct this, Sishen mine adapted a behaviour based safety intervention programme. The aims of this research were to determine drivers that motivate safety and risk behaviour, to identify critical factors for the successful implementation of such a programme, and to determine if the safety culture and performance were affected by the implementation of a behaviour based safety intervention programme. A single-group non-experimental design was used. Questionnaires were used to conduct non-experimental surveys. The questionnaires addressed certain safety culture dimensions. A longitudinal survey was carried out before and after implementation of the behaviour based safety intervention programme. The results showed that the safety culture at the mine improved since implementation of the intervention programme. Management support for safety improved by 6%, peer support for safety by 13%, personal responsibility for safety by 7%, management systems by 6%, and employees actively caring for safety, by 3%. The improvement in safety culture also positively impacted on the injury rate at Sishen mine. Results indicated the following factors as being critical for a successful behaviour based safety implementation (in order of importance): participation, structured implementation, training, readiness for such a programme, communication, observation and feedback, target critical behaviours, flexibility, effective intervention actions, and data management. The study identified issues and challenges which must be dealt with, especially those applicable in developing countries like South Africa, with unique circumstances such as social and political diversity. The conclusion was that safety behaviour is mainly d i e d by activators, and motivated by consequences. The ABC model was identified as an important tool to analyse the drivers for safety behaviour in an effort to develop effective intervention actions. It is recommended that companies shift their focus from traditional safety approaches to the human dimension of safety. Thus, it is recommended that the behaviour based safety model must be applied by companies in order to focus on behaviour. Secondly, it is recommended that factors that are critical for a successful implementation must be identified and ranked in order of importance. The attention which is paid to each critical factor should then be related to its relative importance. It is also recommended that activators and consequences must be regarded as important drivers for safety behaviour when intervention actions are to be developed, and that the ABC technique should be applied in practice to analyse the appropriateness of the intervention actions. By way of conclusion, recommendations for future research are made. / Thesis (Ph.D. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2004.

People, processes and teams form the basis of organisational success. Therefore the understanding and prediction of people and their behaviour- both individual and in a team - is a critical management activity. Behaviour of people are influenced by internal factors such as personality, abilities and skills, perception, beliefs and motives as well as by external factors from the environment in which the individual operates. Understanding these forces and their influence on the individual is paramount if one is to understand how to canalise these behaviours to achieve any given organisational goal. Another concept important to understand, is that of organisational culture which is regarded as beliefs, values and learned ways of coping with experience. Organisational culture develops during the course of an organisation's history, and has become a more and more important concept in organisations, due to its strategic nature and impact on business. The culture of an organisation can be influenced and changed naturally over time, or by using deliberate, carefully designed cultural change interventions. The maturity of an organisation's HSEC systems and processes and related improvement in performance, is related to the prevailing HSEC culture evident in the organisation. It is evident that as an organisation moves from a reactive safety culture to an interdependent safety culture, so does the HSEC performance and lagging indicators of the organisation increase. Behaviour-based safety processes endeavour to influence the individual employee's behaviour in order to improve the safety performance of an organisation. The benefits of behaviour-based safety programs are numerous and lead to reduced injuries and improved levels of safe behaviour amongst employees. Metalloys has selected behaviour-based safety as one of the tools to entrench a culture of zero harm in the organisation and to establish an empowered and enabled workforce. The effectiveness of this approach was assessed during this study The empirical research conducted for this study revealed that both the average response rate per construct and the responses per question within the various constructs reflect a positive response to the elements tested. It is evident from the results that a large proportion of the employees are of the opinion that communication processes are effectively established, employees are involved on a personal level, that there is sufficient supervisor support and that leadership exhibits visible leadership in the organisation. These are all constructs testing the elements required to effectively establish the culture of the organisation. In addition, a large proportion of the employees felt that HSEC systems are well entrenched and that facilities and equipment are of such a standard, as to ensure the safety of employees and that these are maintained at high levels. / Thesis (M.B.A.)--North-West University, Vaal Triangle Campus, 2010

People, processes and teams form the basis of organisational success. Therefore the understanding and prediction of people and their behaviour- both individual and in a team - is a critical management activity. Behaviour of people are influenced by internal factors such as personality, abilities and skills, perception, beliefs and motives as well as by external factors from the environment in which the individual operates. Understanding these forces and their influence on the individual is paramount if one is to understand how to canalise these behaviours to achieve any given organisational goal. Another concept important to understand, is that of organisational culture which is regarded as beliefs, values and learned ways of coping with experience. Organisational culture develops during the course of an organisation's history, and has become a more and more important concept in organisations, due to its strategic nature and impact on business. The culture of an organisation can be influenced and changed naturally over time, or by using deliberate, carefully designed cultural change interventions. The maturity of an organisation's HSEC systems and processes and related improvement in performance, is related to the prevailing HSEC culture evident in the organisation. It is evident that as an organisation moves from a reactive safety culture to an interdependent safety culture, so does the HSEC performance and lagging indicators of the organisation increase. Behaviour-based safety processes endeavour to influence the individual employee's behaviour in order to improve the safety performance of an organisation. The benefits of behaviour-based safety programs are numerous and lead to reduced injuries and improved levels of safe behaviour amongst employees. Metalloys has selected behaviour-based safety as one of the tools to entrench a culture of zero harm in the organisation and to establish an empowered and enabled workforce. The effectiveness of this approach was assessed during this study The empirical research conducted for this study revealed that both the average response rate per construct and the responses per question within the various constructs reflect a positive response to the elements tested. It is evident from the results that a large proportion of the employees are of the opinion that communication processes are effectively established, employees are involved on a personal level, that there is sufficient supervisor support and that leadership exhibits visible leadership in the organisation. These are all constructs testing the elements required to effectively establish the culture of the organisation. In addition, a large proportion of the employees felt that HSEC systems are well entrenched and that facilities and equipment are of such a standard, as to ensure the safety of employees and that these are maintained at high levels. / Thesis (M.B.A.)--North-West University, Vaal Triangle Campus, 2010

In agent based systems, especially in autonomous mobile robots, modelling the environment and its changes is a source of problems. It is not always possible to effectively model the uncertainity and the dynamic changes in complex, real-world domains. Control systems must be robust to changes and must be able to handle these uncertainties to overcome this problem. In this study, a reactive behaviour based agent control system is modelled and implemented. The control system is tested in a navigation task using an environment, which has randomly placed obstacles and a goal position to simulate an environment similar to an autonomous robot&rsquo / s indoor environment. Then the control system was extended to control an agent in a multi-agent environment. The main motivation of this study is to design a control system which is robust to errors and easy to modify. Behaviour based approach with the advantages of fuzzy reasoning systems is used in the system.

Integration is one of the driving themes in database and applied computing research. Starting with the development of Federated Information Systems and passing over to Enterprise Application Integration, the integration of distributed systems receives a lot of attention with the development of Web services these days. Integration on an architecture independent level can be cast to the integration of autonomous object oriented systems which requires the integration of object structure and object behaviour. Past research has mainly addressed the structural aspects meaning the integration of class attributes and relations. This thesis is addressing the integration of object behaviour and proposes a structured, model-driven approach for the integration of business processes specifying software application behaviour. It consists of the identification of correspondences between business processes on different levels of abstraction and associates the correspondences with integration patterns that lead to a specific technical integration. One advantage of the approach is that correspondences and patterns are defined separately, which enhances the re-usability of patterns in different integration scenarios. Integration scenarios can be distinguished between horizontal and vertical integration, and within or across enterprise borders. Within an enterprise, horizontal integration consists of integrating systems on the same level of abstraction and vertical integration consists of integrating systems on different levels of abstractions, whereas across enterprise borders, horizontal integration consists of determining the most appropriate systems, from among a set of functionally equivalent ones, and vertical integration consists of defining an appropriate combination of systems to create a new one. So far, there exist no approach that attempts to support all integration scenarios within a framework. This thesis proposes an integration approach that is able to support all integration scenarios mentioned before. The approach is built on a meta-meta layer architecture and provides generic methods and techniques for the logical integration of object behaviour based on a domain independent framework. The thesis proposes two alternative outcomes of an integration. First one creates a new global behaviour that integrates local behaviour and can be supported by a service oriented architecture. Second alternative outcome are synchronisation points between business process, so-called inter-process dependencies, that can be supported by an event-driven architecture. The advantages and disadvantages of both are discussed in detail.

This thesis puts forward a novel way of control for robotic morphologies. Taking inspiration from Behaviour Based robotics and self-organisation principles, we present an interfacing mechanism, capable of adapting both to the user and the robot, while enabling a paradigm of intuitive control for the user. A transparent mechanism is presented, allowing for a seamless integration of control signals and robot behaviours. Instead of the user adapting to the interface and control paradigm, the proposed architecture allows the user to shape the control motifs in their way of preference, moving away from the cases where the user has to read and understand operation manuals or has to learn to operate a specific device. The seminal idea behind the work presented is the coupling of intuitive human behaviours with the dynamics of a machine in order to control and direct the machine dynamics. Starting from a tabula rasa basis, the architectures presented are able to identify control patterns (behaviours) for any given robotic morphology and successfully merge them with control signals from the user, regardless of the input device used. We provide a deep insight in the advantages of behaviour coupling, investigating the proposed system in detail, providing evidence for and quantifying emergent properties of the models proposed. The structural components of the interface are presented and assessed both individually and as a whole, as are inherent properties of the architectures. The proposed system is examined and tested both in vitro and in vivo, and is shown to work even in cases of complicated environments, as well as, complicated robotic morphologies. As a whole, this paradigm of control is found to highlight the potential for a change in the paradigm of robotic control, and a new level in the taxonomy of human in the loop systems.

The word addiction is almost immediately associated with notions of drug dependency and alcoholism, and drug addiction is often referred to as a pandemic that affects individuals, families, communities and society at large. Aetiological approaches to understanding and treating addiction have changed dramatically throughout history, and currently the most contemporary approach is that of the disease model which views addiction as an illness rather than as a ‘badness’. While the underpinnings of Narcotics Anonymous’ 12 step philosophy employs non-specific drug language as it views all drugs as having the capacity to become addictive, and while it does not distinguish between the capacity for substances and certain behaviours to become addictive, activities such as overeating, having sex and gambling are yet to be classified as legitimate addictions by the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR). As a result, it appears as if some confusion exists as to whether these behaviours should be classified as impulse control disorders or as genuine addictions due to the various similarities they share in common with substance based disorders. The research conducted explored how people recovering from addiction, as well as how people working with addiction understand addiction and multiple dependency, together with the factors that contribute to relapse and the ability to abstain. Various 12 Step meetings from a variety of 12 Step Fellowships were attended and members were invited to participate in the study. Ultimately seventy eight participants completed a self developed questionnaire which was utilised to assess how people recovering from addiction understood addiction and multiple dependency and the factors that contribute to relapse and the ability to abstain. Quantitative data were analysed via descriptive and inferential statistics. Furthermore twenty participants working with addiction were interviewed with the use of a semi structured interview schedule in order to explore their perceptions around addiction and the factors that contribute to relapse and sobriety. Qualitative data were analysed using thematic content analysis. Results indicated that the majority of recovering addicts and professionals working with addiction understand addiction as a disease. However, discrepancy was apparent with regards to whether or not all recovering addicts have the same disease and subsequently whether all addictions can be treated in the same manner. The above result suggested that there was no standardised, uniform way in which the disease model is understood and interpreted. Factors such as cross addiction, resistance to change and issues relating to the maintenance of change were identified as issues that contribute to relapse, while factors such as aftercare, following the 12 step programme and support were identified as the main aspects that contribute to sobriety. No statistical significance was noted between participants who had relapsed as opposed to those who had not for variables of sensation seeking, impulsivity and perceived stress (which may have been as a result of small sample size). Deeper understanding of the disease model together with broader application of it, and a focus on appropriate training and more comprehensive assessment could perhaps see a reduction in high rates of relapse and recidivism more commonly known as the ‘revolving door syndrome’.

This thesis deals with various aspects of indoor navigationfor mobile robots. For a system that moves around in ahousehold or office environment,two major problems must betackled. First, an appropriate control scheme has to bedesigned in order to navigate the platform. Second, the form ofrepresentations of the environment must be chosen. Behaviour based approaches have become the dominantmethodologies for designing control schemes for robotnavigation. One of them is the dynamical systems approach,which is based on the mathematical theory of nonlineardynamics. It provides a sound theoretical framework for bothbehaviour design and behaviour coordination. In the workpresented in this thesis, the approach has been used for thefirst time to construct a navigation system for realistic tasksin large-scale real-world environments. In particular, thecoordination scheme was exploited in order to combinecontinuous sensory signals and discrete events for decisionmaking processes. In addition, this coordination frameworkassures a continuous control signal at all times and permitsthe robot to deal with unexpected events. In order to act in the real world, the control system makesuse of representations of the environment. On the one hand,local geometrical representations parameterise the behaviours.On the other hand, context information and a predefined worldmodel enable the coordination scheme to switchbetweensubtasks. These representations constitute symbols, on thebasis of which the system makes decisions. These symbols mustbe anchored in the real world, requiring the capability ofrelating to sensory data. A general framework for theseanchoring processes in hybrid deliberative architectures isproposed. A distinction of anchoring on two different levels ofabstraction reduces the complexity of the problemsignificantly. A topological map was chosen as a world model. Through theadvanced behaviour coordination system and a proper choice ofrepresentations,the complexity of this map can be kept at aminimum. This allows the development of simple algorithms forautomatic map acquisition. When the robot is guided through theenvironment, it creates such a map of the area online. Theresulting map is precise enough for subsequent use innavigation. In addition, initial studies on navigation in human-robotinteraction tasks are presented. These kinds of tasks posedifferent constraints on a robotic system than, for example,delivery missions. It is shown that the methods developed inthis thesis can easily be applied to interactive navigation.Results show a personal robot maintaining formations with agroup of persons during social interaction. <b>Keywords:</b>mobile robots, robot navigation, indoornavigation, behaviour based robotics, hybrid deliberativesystems, dynamical systems approach, topological maps, symbolanchoring, autonomous mapping, human-robot interaction

<p>This thesis deals with various aspects of indoor navigationfor mobile robots. For a system that moves around in ahousehold or office environment,two major problems must betackled. First, an appropriate control scheme has to bedesigned in order to navigate the platform. Second, the form ofrepresentations of the environment must be chosen.</p><p>Behaviour based approaches have become the dominantmethodologies for designing control schemes for robotnavigation. One of them is the dynamical systems approach,which is based on the mathematical theory of nonlineardynamics. It provides a sound theoretical framework for bothbehaviour design and behaviour coordination. In the workpresented in this thesis, the approach has been used for thefirst time to construct a navigation system for realistic tasksin large-scale real-world environments. In particular, thecoordination scheme was exploited in order to combinecontinuous sensory signals and discrete events for decisionmaking processes. In addition, this coordination frameworkassures a continuous control signal at all times and permitsthe robot to deal with unexpected events.</p><p>In order to act in the real world, the control system makesuse of representations of the environment. On the one hand,local geometrical representations parameterise the behaviours.On the other hand, context information and a predefined worldmodel enable the coordination scheme to switchbetweensubtasks. These representations constitute symbols, on thebasis of which the system makes decisions. These symbols mustbe anchored in the real world, requiring the capability ofrelating to sensory data. A general framework for theseanchoring processes in hybrid deliberative architectures isproposed. A distinction of anchoring on two different levels ofabstraction reduces the complexity of the problemsignificantly.</p><p>A topological map was chosen as a world model. Through theadvanced behaviour coordination system and a proper choice ofrepresentations,the complexity of this map can be kept at aminimum. This allows the development of simple algorithms forautomatic map acquisition. When the robot is guided through theenvironment, it creates such a map of the area online. Theresulting map is precise enough for subsequent use innavigation.</p><p>In addition, initial studies on navigation in human-robotinteraction tasks are presented. These kinds of tasks posedifferent constraints on a robotic system than, for example,delivery missions. It is shown that the methods developed inthis thesis can easily be applied to interactive navigation.Results show a personal robot maintaining formations with agroup of persons during social interaction.</p><p><b>Keywords:</b>mobile robots, robot navigation, indoornavigation, behaviour based robotics, hybrid deliberativesystems, dynamical systems approach, topological maps, symbolanchoring, autonomous mapping, human-robot interaction</p>