Previous research regarding the biosocial approach to aggression suggests that the interaction between biological and environmental variables contribute to aggression. However, this particular relationship has not yet been fully explored in children. Therefore, this study examined the moderating influence of psychophysiological activity, particularly resting heart rate (HR) and HR variability (HRV), on the relationship between child abuse potential (CAP) and child reactive and proactive aggression. Thirty-six children, between the ages of 7 and 13, and their parents were recruited from the local schools and community in Southwestern Virginia. Parents completed self-report measures for child abuse potential (CAP) and the type of aggression displayed by their children (i.e., reactive or proactive). Children were assessed for resting HR and HRV for four minutes during a rest period. CAP was related to increased proactive (i.e., instrumental) and reactive (i.e., hostile) aggression in children with low levels of resting HR. CAP was also related to increased proactive aggression in children with high resting HRV. Significant main effects were not found for CAP or psychophysiological functioning, indicating the importance of examining the interaction of these variables. Taken together, the findings suggest the existence of an interaction of these two biological and social variables above and beyond their individual influences as risk factors. The role of cardiovascular underarousal in relation to proactive and reactive aggression in abused children is discussed. Overall, this study supports the notion of a biosocial interaction for aggression in children, and thus has implications for future research and treatment. / Master of Science

The use of digital technology is becoming increasingly popular in equine research. Current applied technologies for livestock are being used to detect pathogens, observe locomotion patterns, determine estrus periods, and measure vital parameters. These sensors leverage global positioning systems, accelerometers, magnetometers, goniometers, optics, among other emerging sensing technologies. The success of these devices has led to the introduction of various equine wearable sensors into market. These technologies seek to promote mobile devices to be used in equine training, monitoring, and clinical contexts. Therefore, the objective of this research is to characterize advancements, opportunities, and gaps in our existing knowledge of equine wearable sensor technology. Specifically, this research explores two innovative sensors designed for equines and their potential to enhance animal safety and health. The purpose of the research on these sensors is to (1) better contextualize biomechanical data in practically applicable terms and (2) evaluate the accuracy of a photoplethysmography based pulse sensor to detect heart rates of adult horses. In addition, currently marketed equine wearable sensors are reviewed, and their limitations are evaluated. Areas of future research and developments of equine wearable technologies are also explored. / Master of Science / The use of digital technology is becoming increasingly popular in equine research. Several biosensors exist for livestock species which have been successful in helping manage health and wellbeing of these animals. Although commercial development of equine wearable sensors has begun, the success of initial industry prototypes is limited. Commercially available equine wearable sensors currently marketed often seek to provide support in equine training, monitoring, and clinical contexts. Despite several commercially available equine wearable sensors, there has been slow adoption of this type of technology in the industry. Therefore, the objective of this research is to characterize advancements, opportunities, and gaps in our existing knowledge of equine wearable sensor technology. Specifically, it explores two innovative sensors designed for equines and their potential to improve the safety and health these animals. The purpose of these sensors are to (1) better understand factors that influence the safety of equestrian sports with jumping phases and (2) evaluate the accuracy of a sensor to detect heart rates of adult horses. In addition, current marketed equine wearable sensors are reviewed, and their limitations are evaluated. Areas of future research and developments of equine wearable technologies are also explored.

Laboratory scale activated sludge experiments were conducted on primary effluent municipal wastewater to evaluate the effects of anoxic selectors on controlling activated sludge bulking and foaming. These experiments were conducted with two pilot plants; a three stage anoxic selector preceding a complete mix system (experimental unit) and a complete mix system (control unit). Successful selector operation requires balancing two conflicting requirements; obtain a high substrate concentration in the selector while achieving a high substrate removal efficiency in the selector. The high substrate concentration enables rapid substrate uptake to occur predominately by floc forming microorganisms while the high substrate removal efficiency ensures that a feed-starve cycle is created whereby filamentous microorganisms are selected against. The reported metabolic mechanisms responsible for substrate uptake in the selector are the formation of internal storage products and high rate metabolism. As presented by Jenkins et al., (1993) small amounts of substrate are oxidized in the selector during the formation of internal storage products. Hence, large quantities of substrate can be removed while reducing only small amounts of the terminal electron acceptor. The internal stores are metabolized in the main biological reactor only after the exogenous substrate has been exhausted. High rate metabolism in the selector results in larger amounts of substrate oxidation. Consequently, for successful selector operation large quantities of the terminal electron acceptor must be reduced. The anoxic selector pilot unit successfully reduced activated sludge settleability and biological foams relative to the control unit. Results from this study indicate that the mode of substrate removal was influenced by the initial selector floc load. This is in general agreement with the findings by Goel and Gaudy (1968) and Gaudy and Gaudy (1988) on oxidative assimilation in activated sludge treatment. The floc load depicts the instantaneous organic loading in the selector irrespective of hydraulic retention time. Results from this study further indicate that for lower floc loadings substrate storage is predominate. Alternatively, at higher floc loadings high rate substrate metabolism is predominate. Therefore, it is hypothesized that for selector zones with high enough F/M ratios to promote rapid substrate uptake, the mechanism predominately responsible for substrate removal is influenced by the floc loading. / Master of Science

No / Introduction There is increasing evidence that lowering HR in cardiovascular disease may be beneficial. Recent trials have documented heart rate (HR) using supine ECG and the NICE guideline for heart failure[1,2] suggests lowering HR below 75 bpm but without specifying how HR should be measured. There is no published data on how HR measured by supine ECG compares to “real world” measurement in the clinic or surgery and any discrepancy might lead to overzealous introduction of HR lowering treatment. Method HR was measured in 136 consecutive patients attending a new cardiology OP clinic. Three methods of measuring HR were compared in the following sequence: Supine HR measured by ECG “real world” measurement by the nurse using Dynamat (auto) Manually over 30 sec during examination (Dr). Patients with dysrhythmia were excluded. Findings HR measured using these 3 methods has been presented separately and has shown a significant difference with ECG HR slower on average by >6bpm vs. either auto or Dr Measurement. The table shows the number and % of patients where HR was either ≥ 70bpm (Shift evidence) or ≥ 75 bpm (Nice guidelines) measured by one or two methods but not all three. Conclusion Real world HR measurement is consistently higher than supine ECG HR and may therefore lead to over inclusive treatment according to guideline recommendations. The method used to measure HR should be defined both in clinical trials and in published guidelines. Supine ECG is suggested as the preferred method for documenting HR prior to initiating rate lowering therapy.

The main focus of the paper is the problem of exchange-rate exposure of Swedish firms between Jan, 1st 2002 and Sep, 27th 2006. Defined as “a measure of the potential for a firm’s profitability, net cash flow, market value to change because of a change in exchange rates”, the problem of exchange rate exposure is investigated, making use of the “Market Value Approach” (also known as “Stock Market Ap-proach”), with certain additional extensions. With Sweden being a very open economy with strong export orientation, we expected to find a greater number of firms showing significant ex-change rate exposure to one or more of the chosen 6 bilateral exchange rates (SEK/EUR, SEK/USD, SEK/DKK, SEK/NOK, SEK/GBP and SEK/JPY). Also, companies are divided into categories with respect to their main operating activity. The empirical study finds 78% of all companies in the sample with significant exposure, with dominance of lagged effect over con-temporaneous. This percentage is higher than found in previous empirical studies, being in sup-port of the suggestion that relation exists between economy openness and exchange rate expo-sure of firms. However, the significant cross-section differences across categories and the high level of heterogeneity within categories deter us from determining the sign, direction and magni-tude of the exchange rate exposure. Suggestions are made for further studies and possible exten-sions of the topic of the present paper.

<p>The main focus of the paper is the problem of exchange-rate exposure of Swedish firms between Jan, 1st 2002 and Sep, 27th 2006. Defined as “a measure of the potential for a firm’s profitability, net cash flow, market value to change because of a change in exchange rates”, the problem of exchange rate exposure is investigated, making use of the “Market Value Approach” (also known as “Stock Market Ap-proach”), with certain additional extensions. With Sweden being a very open economy with strong export orientation, we expected to find a greater number of firms showing significant ex-change rate exposure to one or more of the chosen 6 bilateral exchange rates (SEK/EUR, SEK/USD, SEK/DKK, SEK/NOK, SEK/GBP and SEK/JPY). Also, companies are divided into categories with respect to their main operating activity. The empirical study finds 78% of all companies in the sample with significant exposure, with dominance of lagged effect over con-temporaneous. This percentage is higher than found in previous empirical studies, being in sup-port of the suggestion that relation exists between economy openness and exchange rate expo-sure of firms. However, the significant cross-section differences across categories and the high level of heterogeneity within categories deter us from determining the sign, direction and magni-tude of the exchange rate exposure. Suggestions are made for further studies and possible exten-sions of the topic of the present paper.</p>

No description available.

Thesis (M. Phil.)--University of Hong Kong, 1991.

In the beginning this thesis deals with the theory of the exchange rate, its quotations, significance of its economic effect and ultimately the parity rate of interest, which is divided into a covered and an uncovered interest parity. It is followed by the methodology, which includes formulas and procedures used to achieve the aim. The most important part is the practical part, which deals with the general presentation of selected countries (Czech Republic, Republic of Poland, Hungary, Republic of Croatia and Romania) in terms of significant macroeconomic indicators and also shows the development of the exchange rates and interest rates in those countries. Subsequently, the thesis focuses on the verification of the uncovered interest parity by means of a graphical analysis, a regression analysis and a paired t-test. In view of results of these methods the conclusion was reached, that the theory has not been proven. The last two chapters describe the differences between the results of the selected countries and the possible reasons for the failure of the uncovered interest rate parity.

Context: Sudden Infant Death Syndrome (SIDS) is a phenomenon in which new-born-infants die, often during sleeping, and no cause of death is identified after the autopsy and examination. Assumptions can be made in order to understand what happened to the infant, e.g. heart failures and insufficient breathing rate due to the position of the infant, although deeper studies are hard to be performed, since recording real-cases of sudden infant death on camera is not so trivial. Objectives: Our main objective with the work hereby presented is to perform a study on practical issues that may arise when one is contemplating to build a mobile application for monitoring the heart rate of individuals. These issues may include the levels of accuracy of heart rate measurements that can be retrieved by the current technology, best room conditions for the application to work and positioning of the device in respect to the subject under monitoring. Our secondary objective with this work is to present a heart rate monitor prototype application at a conceptual level. Methods: We conducted a literature review and an analysis of the current available technology, approaches and applications for smart-phones. We conducted experiments on a controlled environment by taking heart rate measurements and comparing results obtained from one smart phone application with results obtained with one standard electrocardiogram tool. After gathering the outputs of the experiments, we analyzed the patterns with the ultimate goal to identify the best set of parameters for the application to work. Results: Our main achievements were obtained through the data that we collected. Although related this work with SIDS, we collected data from adults. The procedures for obtaining the Heart Rate with the application analyze the skin of an individual and, thus, it does not matter if it is an infant or adult. We identified relevant parameters that affect directly the performance of the application, leading it to malfunction. Finally, we proposed a prototype of a mobile heart rate monitoring, that we named The Mobile Heart Rate Monitoring System (MHRMS) at a conceptual level, adding-up functionality to the existing technology and also outlining the best conditions and positioning for it to work correctly. Conclusions: The main conclusion that we reached is that it is reasonable to make use of the current technology that are available in today’s smart phones for having a trustworthy heart rate monitoring tool.