The purpose of this research was to compare the design of Dose Error Reduction Software (DERS) between smart pumps to determine which features affect the ability of nurses to safely and efficiently program intravenous medications. A high-fidelity usability experiment was conducted. Twenty-four Registered Nurses completed a series of infusion tasks, in a simulated clinical environment, using three smart pumps (Cardinal Alaris System, BBraun Infusomat, and Hospira Symbiq). Results found significant differences in nursing performance across the smart pumps. Nurses were more likely to override clinically inappropriate soft limit alerts when using BBraun Infusomat, than when using Hospira Symbiq or Cardinal Alaris System. Furthermore, when asked to program an infusion over a specific duration, nurses were found to make significantly more parameter entry errors when using Hospira Symbiq than when using Cardinal Alaris System. Results from this study will help set DERS design principles, and assist hospitals during their procurement processes.

Users have difficulty relying on automated combat identification aids; however, verbally informing users of the automation reliability has helped them rely on the automation more appropriately. A number of interfaces that displayed automation reliability information in real time were developed and tested. In Experiment I, participants used the interfaces in the IMMERSIVE simulation, a first person shooter game. The results showed that the form of the interface affected both reliance on the automation and sensitivity in discriminating hostile and friendly targets. The difference in sensitivity and reliance may be attributed to how participants allocated their attention among the displays. In Experiment II, still combat scenes were presented to the participants for 400 or 800 milliseconds (as opposed to 10 seconds in Experiment I) to place additional time stress on attention resources. The results replicated the results of Experiment I, but sensitivity measures showed a dependence on reliability of the automation.

The purpose of this research was to compare the design of Dose Error Reduction Software (DERS) between smart pumps to determine which features affect the ability of nurses to safely and efficiently program intravenous medications. A high-fidelity usability experiment was conducted. Twenty-four Registered Nurses completed a series of infusion tasks, in a simulated clinical environment, using three smart pumps (Cardinal Alaris System, BBraun Infusomat, and Hospira Symbiq). Results found significant differences in nursing performance across the smart pumps. Nurses were more likely to override clinically inappropriate soft limit alerts when using BBraun Infusomat, than when using Hospira Symbiq or Cardinal Alaris System. Furthermore, when asked to program an infusion over a specific duration, nurses were found to make significantly more parameter entry errors when using Hospira Symbiq than when using Cardinal Alaris System. Results from this study will help set DERS design principles, and assist hospitals during their procurement processes.

Users have difficulty relying on automated combat identification aids; however, verbally informing users of the automation reliability has helped them rely on the automation more appropriately. A number of interfaces that displayed automation reliability information in real time were developed and tested. In Experiment I, participants used the interfaces in the IMMERSIVE simulation, a first person shooter game. The results showed that the form of the interface affected both reliance on the automation and sensitivity in discriminating hostile and friendly targets. The difference in sensitivity and reliance may be attributed to how participants allocated their attention among the displays. In Experiment II, still combat scenes were presented to the participants for 400 or 800 milliseconds (as opposed to 10 seconds in Experiment I) to place additional time stress on attention resources. The results replicated the results of Experiment I, but sensitivity measures showed a dependence on reliability of the automation.

With the rise of mobile computing and an ever-growing variety of ubiquitous sensors, computers are becoming increasingly context-aware. A revolutionary step in this process that has seen much progress will be user-awareness: the ability of a computing device to infer its user's emotions. This research project attempts to study the effectiveness of enabling a computer to adapt its visual interface to counter user frustration. A two-group experiment was designed to engage participants in a goal-oriented task disguised as a simple usability study with a performance incentive. Five frustrating stimuli were triggered throughout a single 15-minute task in the form of complete system unresponsiveness or delay. An algorithm was implemented to attempt to detect sudden rises in user arousal measured via a skin conductance sensor. Following a successful detection, or otherwise a maximum of a 10-second delay, the application resumed responsiveness. In the control condition, participants were exposed to a “please wait” pop-up near the end of the delay whereas those in the adaption condition were exposed to an additional visual transition to a user interface with calming colours and larger touch targets. This proposed adaptive condition was hypothesized to reduce the recovery time associated with the frustration response. The experiment was successfully able to induce frustration (via measurable skin conductance responses) in the majority of trials. The mean recovery half-time of participants in the first trial adaptive condition was significantly longer than that of the control. This was attributed to a possibility of a large chromatic difference between the adaptive and control colour schemes, habituation and prediction, causal association of adaptation to the frustrating stimulus, as well as insufficient subtlety in the transition and visual look of the adaptive interface. The study produced findings and guidelines that will be crucial in the future design of adaptive affective user interfaces.

The flightcrew of a modern airliner operates in a multi-tasking environment with several tasks competing for the same attentional resources at the same time. Too many tasks vying for the crew's attention concurrently imposes a heavy workload on the flightcrew. This results in the satisfactory execution of some tasks at the expense of others. Consequently, flightcrews must manage cockpit tasks a process we call Cockpit Task Management (CTM). Funk (1991) defines cockpit task management (CTM) as the process flightcrews use to prioritize cockpit tasks, allocate required resources, initiate and terminate multiple concurrent tasks. Despite improvements in aircraft reliability and advancements in aircraft cockpit automation, "pilot error" is cited as the main reason (over 60% of all aircraft accidents) for planes still falling out of the skies. One of the objectives of this research was to determine the significance of CTM errors in "pilot errors". Having established its significance, the next step was to refine the existing error taxonomy of Chou & Funk (1991). A structured error classification methodology was also developed for classifying CTM errors and validated using 470 Aviation safety Reporting System (ASRS) airline incident reports. This study identified CTM errors as a significant component of "pilot errors" accounting for 231 of the 470 incidents analyzed (49.2%). While Task Initiation errors accounted for the largest of the general error categories (41.5%), it was the Task Prioritization errors (35% of general and specific error categories) that unlocked the door that led to error committals in the other error categories. Task Prioritization errors led to Resource allocation errors which, in turn, resulted in several kinds of errors being committed in the other categories. The findings had implications that were largely training-based. In particular, the importance of pilot education which CTM provides (as opposed to crew training that CRM provides) is emphasized. The incorporation of formal CTM concept into existing CRM training programs was advocated. In addition, a staggered scheduling mechanism in crew training agenda involving CTM, CRM, Line-Oriented-Flight-Training (LOFT) and simulator sessions was suggested. A recommendation was made for a comprehensive Cockpit Task Management System (CTMS) to be installed in the cockpit to help crews to prioritize tasks and remind them of the need to initiate, terminate or reprioritize tasks as necessary. The inclusion of Air Traffic Control personnel in flightcrew training sessions was also recommended. / Graduation date: 1994

Wood poles are popular and widely used in the Power Supply Industries in all over the world because of their high strength per unit weight, low installation and maintenance costs and excellent durability. Reliability of these components depends on a complex combination of age, usage, component durability, inspection, maintenance actions and environmental factors influencing decay and failure of components. Breakdown or failure of any one or more of these components can lead to outage and cause a huge loss to any organisation. Therefore, it is extremely important to predict the next failure to prevent it or reduce its effect by appropriate maintenance and contingency plans. In Australia, more than 5.3 million wooden poles are in use. This represents an investment of around AU$ 12 billion with a replacement cost varying between AU$1500-2500 per pole. Well-planned inspection and maintenance strategies considering the effect of environmental and human factors can extend the reliability and safety of these components. Maintenance and sophisticated inspection is worthwhile if the additional costs are less than the savings from the reduced cost of failures. Objectives of this research are to: * Investigate decay patterns of timber components based on age and environmental factors (e.g. clay composition) for power supply wood pole in the Queensland region. * Develop models for optimizing inspection schedules and Maintenance plans. Deterioration of wood poles in Queensland is found mostly due to inground soil condition. It is found that the moisture content, pH value (Acidity/ alkalinity), bulk density, salinity and electrical conductivity have influence over the deterioration process. Presence of Kaolin or Quartz has some indirect effect on the degradation process. It allows more water to be trapped inside the soil that cause algae, moss and mould to grow and attack the wood poles. On the other hand, by virtue of permeability, soils with high quartz content allows more water to infiltrate, preventing the growth of micro-organism. This research has increased fundamental understanding of inground wood decay process, developed testing methods for soil factors and proposed integrated models for performance improvement through optimal inspection, repair and replacement strategies considering durability, environmental and human factors in maintenance decisions. A computer program is also developed to analyse "what if" scenario for managerial decisions. This research has enhanced knowledge on the wood decay process in diverse environmental conditions. The outcomes of this research are important, not only to users of timber components with ingrond decay but also to the wood industry in general (the housing sector, railways for wooden sleepers and other structural applications such as timber bridges). Three refereed conference papers have already come out of this research and two more papers for refereed journal publication are in the process. This research can be extended to develop models for: * Qualitative as well as quantitative research database on lab/field wood decay process; * Assessment of the residual life of timber infrastructure; * Optimal condition monitoring and maintenance plans for timber components showing inground decay; And * Cost effective decisions for prevention of timber components and mitigation. Findings of this research can be applied to other equipment or assets showing time dependent failure rate and can be extended further to consider age/usage replacement policies, downtime and liability costs.

Developing effective strategies for international construction projects requires knowledge and expertise that is technically, socially, politically, economically and culturally based (Fellows et al., 2002). These strategies all require effective communication to work. Communication in the international environment is further complicated by the differences in languages and cultures involved. The importance of effective communication cannot be overemphasised because it is the ultimate means by which behaviour is modified, change is effected, knowledge is acquired and shared, and goals are achieved (Howes and Tah, 2003). According to Loosemore and Al Muslmani (1999), communication problems will emerge as one of the most significant contemporary challenges facing construction project managers in an increasingly international construction market. However, Dieckmann (1996) points out that communication is also regarded as one of the most neglected and overlooked parts of international operations, and lack of communication has been cited as one of the biggest reasons for the failure of change projects to meet their expectations (Pardu, 1996). Cross-cultural communication is defined as "the process whereby individuals from different cultural backgrounds attempt to share meanings and feelings through the exchange of verbal and non-verbal messages" (Harris and Moran, 2000). This sequential explanatory mixed methods study investigates the impact of cross-cultural communication on construction project management systems in Samoa. The first phase involved an opinion questionnaire survey with predominantly quantitative questions addressing the impact of human and cultural influences on project management and crosscultural communication evaluation processes, as experienced by expatriates and local managers, who have worked or are working in Samoa across a number of industries. Qualitative interviews were used in the second phase to probe significant themes and findings in the first phase by explaining and exploring aspects of the cross-cultural communication process focusing on construction project managers and supervisors working in Samoa. The quantitative results and qualitative findings generally confirmed the literature on crosscultural communication and related project management issues. The findings highlighted contrasting views between the different nationalities involved in projects in Samoa. Specific 'new themes' to a small island nation such as Samoa were identified. This research developed a generic conceptual framework for cross-cultural communication evaluation in an international project environment. An integrated cultural framework was also formulated to identify central differences in culture. In conclusion, it is clearly evident from this study that international project management requires an effective process regarding communication evaluation. The findings indicate there is no single 'best solution' to effectively manage the impact of cross-cultural communication on management systems. Rather, it requires the application of appropriate strategies by the proactive practitioners with the necessary cross-cultural skills that best suit the host environment in which the projects are being carried out.

This thesis aims to investigate the relationship between the provision of spatial order and perceived sense of community in high-rise housing developments in Korea from a socio-spatial and architectural perspective. It also considers relationships between the perception of neighbourhood, provision of facilities, design aspects, and socio-economic characteristics and sense of community. The study uses a questionnaire survey as the main research instrument conducted across four case studies in Bundang new town, in metropolitan Seoul, Korea. Two of the cases were selected as having a high provision of spatial order and the other two low provision according to the concepts of Altman (1975) and Newman (1972, 1975). Quantitative analysis is carried out using the Kruskal-Wallis/Mann-Whitney test and Spearman???s rank correlation to identify differences and correlations between cases. The results indicate that there is no clear evidence that a sense of community has a direct relationship with the provision of spatial order in the selected cases. However, in the high provision cases outdoor common spaces appear to have a role in contributing to social interaction. Among Buckner???s (1988) three sub-variables of his concept of neighbourhood cohesion, ???neighbouring??? appears to be more associated with the provision of spatial order rather than ???attraction-to-neighbourhood??? or ???psychological sense of community.??? A greater number of opportunities for social interactions occur in an intermediate space located between private dwelling units and public open space in cases with a high provision of spatial order. However, this is likely to be due to the location of shared facilities and their frequency of use. In terms of the relationship between design and a sense of community, ???landscaping??? was found to be the most important variable, followed by the ???design of streets/footpath??? and ???facilities for children???, ???parking???, and ???recreational activities???. Despite the lack of a clear relationship between design and a sense of community, a strong demand was found for improved outdoor amenity and greater provision of facilities. Socio-economic status appears not to be a significant factor directly influencing the sense of community however, age and the existence of children are associated with the perception of neighbourhood.

Thesis (M. S.)--Psychology, Georgia Institute of Technology, 2008. / Committee Chair: Fisk, Arthur; Committee Member: Corso, Gregory; Committee Member: Rogers, Wendy.