Perceived emotional competence and emotion appraisal skills in middle childhood in typically developing and behaviourally challenged children.

This thesis addresses whether children with severe behavioural problems lack emotional competence in key areas and, if so, whether this is reflected in their ability to appraise emotions in others. Self-rated and objectively rated emotional competence of children in mainstream schooling was compared with 20 children aged seven to 11 excluded for severe social, emotional and behavioural difficulties. In Study 1 self-report questionnaires measured affect perception, empathy and expressivity in typically developing (N=203), special educational needs (N=36) and socially, emotionally and behaviourally disordered (N=30) children in mainstream schooling. Younger children were less perceptive of affect than older children and scored lower for cognitive empathy. Boys scored lower in cognitive and affective empathy than girls and were less intimate, and more covert, in their expression of emotion. Special educational needs children appeared less emotionally perceptive than their peers. In Studies 2a and 2b, affect appraisal and the ability to describe emotional change were examined using a new measure employing pictorial representations of children in ambiguous postures and facial representations of emotion. Typical patterns of appraisal of possibly threatening, depressive and innocuous postures were established (N=242). A developmental progression in reasons given for emotional change was seen with older children providing more socially based and mentalising answers than younger children. Study 3 developed an interactive computerised measure to examine the point at which children recognise the emergence of emotion from an interpolation of photographic facial expressions. Eighty-five typically developing children manipulated 26 emotional changes, including emotion/emotion and emotion/neutral transitions and chose a point of uncertainty in the transformation. A significant effect was found for facial representations of fear and anger, indicating a threat detection mechanism in response to emergent emotion. In Study 4 children with severe behavioural problems were compared across all measures with typically developing children from the first three studies. Behaviourally challenged children were deficient in cognitive and affective empathy and exhibited a hostile appraisal bias when assessing ambiguous postures of other children. No deficit was found in the ability to evaluate emotional change and provide age-appropriate reasons. However, anger was dominant in the perception even over fear stimuli when assessing emotional transition. Overall, children excluded from mainstream schooling with severe behavioural problems showed a very different profile to mainstream children with behavioural problems, suggesting a qualitative difference in cognitive functioning that could have a predictive function. This thesis not only supports the premise that severe SEBD children exhibit altered emotional functioning but has developed a series of tests that will have ongoing value in applied research

Propagation of sound through the Earth's atmosphere

The data collected at a pressure of one atmosphere for the different temperatures and relative humidities of the air-water vapor mixtures is summarized. The dew point hygrometer used in these measurements did not give reliable results for dew points much above the ambient room temperature. For this reason measurements were not attempted at the higher temperatures and humidities. Viscous wall losses in the resonant tube at 0 C so dominate the molecular relaxation of nitrogen, in the air-water vapor mixture, that reliable data could not be obtained using the free decay method in a resonant tube at one atmosphere. In an effort to obtain viable data at these temperatures, measurements were performed at a pressure of 10 atmospheres. Since the molecular relaxation peak is proportional to the pressure and the viscous losses are proportional to the inverse square root of the pressure the peak height should be measurable at the higher pressure. The tradeoff here is that at 10 atmospheres; the highest relative humidity attainable is 10 percent. The data collected at 10 atmospheres is also summarized

Propagation of sound through the Earth's atmosphere. 1: Measurement of sound absorption in the air: 2: Measurement of ground impedance

Parts were fabricated for the acoustic ground impedance meter and the instrument was tested. A rubber hose was used to connect the resonator neck to the chamber in order to suppress vibration from the volume velocity source which caused chatter. An analog to digital converter was successfully hardwired to the computer detection system. The cooling system for the resonant tube was modified to use liquid nitrogen cooling. This produced the required temperature for the tube, but the temperature gradients within each of the four tube sections reached unacceptable levels. Final measurements of the deexcitation of nitrogen by water vapor indicate that the responsible physical process is not the direct vibration-translation energy transfer, but is a vibration-vibration energy transfer

Learning medical alarms whilst performing other tasks.

Two studies are reported which first observe, and then attempt to replicate, the cognitive demands of intensive care unit (ICU) activity whilst concurrently learning audible alarms. The first study, an observational study in an ICU ward, showed that the alarms are very frequent and co-occur with some activities more than others. The three most frequently observed activities observed in the ICU were drugs (calculation, preparation and administration), patient observation and talking. The cognitive demands of these activities were simulated in a second, laboratory-based experiment in which alarms were learned. The results showed that performance in the alarm task generally improved as participants were exposed to more repetitions of those alarms, but that performance decrements were observed in the secondary tasks, particularly when there were two or three of them. Some confusions between the alarms persisted to the end of the study despite prolonged exposure to the alarms, confusions which were likely caused by both acoustic and verbal labelling similarities. PRACTITIONER SUMMARY: The cognitive demands of working in an ICU were observed and simulated whilst alarms were learned. Alarms should generally avoid sharing similar rhythmic (and other) characteristics. The simulation task described here could be used for testing alarm learning without requiring a clinical environment

The contribution of molecular relaxation in nitrogen to the absorption of sound in the atmosphere

Results and statistical analysis are presented for sound absorption in N2-H2O binary mixtures at room temperature. Experimental procedure, temperature effects, and preliminary results are presented for sound absorption in N2-H2O binary mixtures at elevated temperatures

Land Quality and International Agricultural Productivity: A Distance Function Approach

Agricultural productivity measurement has been of great interest in recent years. Although analysts have long recognized that land quality plays an important role in agricultural productivity, land quality has been difficult to quantify and include in productivity models due to d ata limitations. Poor land quality, in the form of desertification, erosion, and poor soil quality, as well as climate and precipitation may limit growth in productivity over time. A Malmquist productivity index is proposed that decomposes productivity into efficiency change, technical change and land quality components and accounts for inter-country differences in land quality. The index is then applied to a 109-country data set covering 1980 to 2003. Many countries with lower productivity growth are limited by their resource endowment, and thus require policies and technology that reflect the needs of those environments.Land Economics/Use, Productivity Analysis,

Propagation of sound through the Earth's atmosphere

Progress is reported in the development of hardware and software for an experiment to detect and measure sound transmission through air