[Truncated abstract] During the last fifty years mathematical models of catchment hydrology have been widely developed and used for hydrologic forecasting, design and water resources management. Most of these models need large numbers of parameters to represent the flow generation process. The model parameters are estimated through calibration techniques and often lead to ‘unrealistic’ values due to structural error in the model formulations. This thesis presents a new strategy for developing catchment hydrology models for representing streamflow and salinity generation processes. The strategy seeks to ‘learn from data’ in order to specify a conceptual framework that is appropriate for the particular space and time scale under consideration. Initially, the conceptual framework is developed by considering large space and time scales. The space and time scales are then progressively reduced and conceptual model complexity systematically increased until ultimately, an adequate simulation of daily streamflow and salinity is achieved. This strategy leads to identification of a few key physically meaningful parameters, most of which can be estimated a priori and with minimal or no calibration. Initially, the annual streamflow data from ten experimental catchments (control and cleared for agriculture) were analysed. The streamflow increased in two phases: (i) immediately after clearing due to reduced evapotranspiration, and (ii) through an increase in stream zone saturated area. The annual evapotranspiration losses from native vegetation and pasture, the ‘excess’ water (resulting from reduced transpiration after land use change), runoff and deep storage were estimated by a simple water balance model. The model parameters are obtained a priori without calibration. The annual model was then elaborated by analysing the monthly rainfall-runoff, groundwater and soil moisture data from four experimental catchments. Ernies (control, fully forested) and Lemon (53% cleared) catchments are located in zone with a mean annual rainfall of 725 mm. Salmon (control, fully forested) and Wights (100% cleared) are located in zone with mean annual rainfall of 1125 mm. Groundwater levels rose and the stream zone saturated area increased significantly after clearing. From analysis of this data it was evident that at a monthly time step the conceptual model framework needed to include a systematic gain/loss to storage component in order to adequately describe the observed lags between peak monthly rainfall and runoff.

[Truncated abstract] The use of uncertainty analysis is gaining considerable attention in catchment hydrological modeling. In particular, the choice of an appropriate model structure, the identifiability of parameter values, and the reduction of model predictive uncertainty are deemed as essential elements of hydrological modelling. The chosen model structure must be parsimonious, and the parameters used must either be derivable from field measured data or inferred unambiguously from analysis of catchment response data. In this thesis, a long-term water balance model for the Susannah Brook catchment in Western Australia has been pursued using the ?downward approach?, which is a systematic approach to determine the model with the minimum level of complexity, with parameter values that in theory are derivable from existing physiographic data relating to the catchment. Through the analysis of the rainfall-runoff response at different timescales, and the exploration of the climate, soil and vegetation controls on the water balance response, an initial model structure was formulated, and a priori model parameter values estimated. Further investigation with the use of auxiliary data such as deuterium concentration in the stream and groundwater level data exposed inadequacies in the model structure. Two more model structures were then proposed and investigated through formulating alternative hypotheses regarding the underlying causes of observed variability, including those associated with the absence of a contribution of deep groundwater flow to the streamflow, which was indicated by deuterium concentration and internal dynamics characterized by the observed groundwater levels. ... These differences are due to differences in the time delay between rainfall and recharge between upland and riparian regions. The ages of water recharging the groundwater and discharging from the catchment were estimated by assuming a piston flow mechanism. In the deeper, upland soils, the age of recharging water was considerably larger than the unsaturated zone delay would suggest; a recharge response 16 days after an infiltration event may involve water as much as 160 days old. On the other hand, the delay and the age of recharging water were much lower in the shallow riparian zone. Where the upland zone contributes significantly to discharge, the predicted difference between the rainfall-discharge response time and the average age of discharging water can be significant.

This thesis presents an extension to the Temporal Fast Downward planning system that integrates motion planning in it and algorithms for generating two types of temporal macro operators expressible in PDDL2.1. The extension to the Temporal Fast Downward planning system includes, in addition to the integration of motion planning itself, an extension to the context-enhanced additive heuristic that uses information from the motion planning part to improve the heuristic estimate. The temporal macro operators expressible in PDDL2.1 are, to the author's knowledge, an area that is not studied within the context of plan repair before. Two types of temporal macro operators are presented along with algorithms for automatically constructing and using them when solving plan repair problems by replanning. Both the heuristic extension and the temporal macro operators were evaluated in the context of simulated unmanned aerial vehicles autonomously executing reconnaissance missions to identify targets and avoiding threats in unexplored areas. The heuristic extension was proved to be very helpful in the scenario. Unfortunately, the evaluation of the temporal macro operators indicated that the cost of introducing them is higher than the gain of using them for the scenario.

Barbora Votavová ISS FSV UK Diploma thesis abstract University career without a degree - drop-out phenomenon in the context of university education massification The thesis focuses on the phenomenon of not finishing university in the context of masification of tertiary education and changign character of labour market. Unlike educational reproduction and mobility, that is often studied in Czech context, only a couple of texts focus on the phenomenon of not finishing. This text therefore tries to open this topic by analyzing experiences and narration of those who leave university before getting a degree. Based on interviews with drop-outs, it searches for the specific aspects of their educational trajectories. It attempts to reconstruct the meanings that they ascribe various parts, moments and characteristics of their own educational trajectories. The thesis searches answers to basic questions about the significance and meaning of education, trajectories and aspects influencing the specific shape of the trajectory and identify areas that are relevant for the drop-out topic. Original data are analyzed in the broader context in which the trajectories take place - the context of dynamic and changing labour market and changing character of universities, and interpreted in the context of existing drop-out...

Humanitarian accountability has been a topic of discussion since the 1990s, in response to a number of high-level scandals. Dozens of initiatives highlighting the importance of accountability to affected populations have been established. However, humanitarian organisations still receive criticisms for lacking accountability. This thesis examines the research question: How does the World Food Programme use international standards to guide accountability in its humanitarian interventions in Iraq, and how these standards fulfil its commitments to the affected populations? This is done through an in-depth case study of the WFP, in the context of Iraq. The academic literature highlights the concept of humanitarian accountability as both a practical concern as well as a moral one. This is emphasised within the literature of humanitarian organisations together with how accountability, as a concept, have been poorly defined, and research as to its practice is continuously lacking. This research found that the accountability provided was mainly technical and accountability to affected populations in Iraq remain low. Accountability practices that are currently in place does not live up to the commitment made by the WFP to affected populations in Iraq. Further, the research pinpoints how accountability within the WFP has become more of a technical standard in practice, which has resulted in limited scope of accountability to affected populations in Iraq. This results in phantom accountability, characterised by meaningless mechanisms and indicators that instead portray an image of accountability while not translating into actual practical actions towards affected populations.

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Denna studie undersöker hur mödrars sociala jämförelser påverkar deras upplevda tilltro till att hantera specifika situationer inom föräldrarollen. Därtill undersöker studien om det är skillnad på att jämföra sig uppåtgående eller nedåtgående. Studiens urval består av 205 mödrar med barn i åldrarna 0-5 år, boendes i Sverige. Data har samlats in online och offline vid två tidpunkter (T1 och T2) med ett års mellanrum. Resultatet visar att sociala jämförelser inte påverkar mödrars upplevda tilltro i sig, specifikt uppåtgående jämförelser gör det. En spekulativ förklaring till resultatet är att sociala jämförelser kan ha en effekt på mödrars upplevda tilltro för stunden medans uppåtgående jämförelser påverkar långsiktigt. / The purpose of the study was to examine how mothers social comparison affect their believed self-efficacy managing specific situations within the parental role. Furthermore, the study has included a distinct difference between upward social comparison and downward social comparison to further emphasize the different outcomes of the two. The sample was based on 205 mothers with children ranging from ages 0-5 all based in Sweden. Data for the study was collected during two different occasions (T1 & T2) with a one year span in between them. The result showed in general, social comparison does not affect mothers believed self-efficacy per se, upward comparison do. A speculative explanation to the result is that social comparisons might have an effect on mothers self-efficacy in the moment while upward comparison have a long term effect.

No description available.

Social comparison influences well-being, especially during psychological threat. Social comparison outcomes have been theorized to depend on motivation, frequency, contrast versus identification, with a better- versus worse-off other. To reduce this complexity in the theory, 94 senior-housing residents were interviewed and cluster analysis was conducted. Four clusters emerged. Half the interviewees formed a cluster using only adaptive social comparison methods. Adaptives were contrasted with a cluster of indiscriminate comparers, a cluster striving for improvement, and a cluster of participants disagreeing with most questions. Clusters differed especially in patterns of downward identification, upward and downward contrast. Self-evaluation and uncertainty-reduction also differed between clusters; self-enhancement and self-improvement motivations did not. Cluster membership had no direct effect on well-being, but moderation analysis demonstrated threat-buffering of high neuroticism in the adaptive cluster. The benefits were not due to self-esteem or educational level. By separating individuals rather than behaviors, cluster analysis provides a fresh perspective.

Social comparison influences well-being, especially during psychological threat. Social comparison outcomes have been theorized to depend on motivation, frequency, contrast versus identification, with a better- versus worse-off other. To reduce this complexity in the theory, 94 senior-housing residents were interviewed and cluster analysis was conducted. Four clusters emerged. Half the interviewees formed a cluster using only adaptive social comparison methods. Adaptives were contrasted with a cluster of indiscriminate comparers, a cluster striving for improvement, and a cluster of participants disagreeing with most questions. Clusters differed especially in patterns of downward identification, upward and downward contrast. Self-evaluation and uncertainty-reduction also differed between clusters; self-enhancement and self-improvement motivations did not. Cluster membership had no direct effect on well-being, but moderation analysis demonstrated threat-buffering of high neuroticism in the adaptive cluster. The benefits were not due to self-esteem or educational level. By separating individuals rather than behaviors, cluster analysis provides a fresh perspective.