Mariner Mars 1964 telecommunication system

Radio, telemetry, and command subsystems of Mariner IV telecommunication syste

Orbiting Deep Space Relay Station (ODSRS). Volume 1: Requirement determination

The deep space communications requirements of the post-1985 time frame are described and the orbiting deep space relay station (ODSRS) is presented as an option for meeting these requirements. Under current conditions, the ODSRS is not yet cost competitive with Earth based stations to increase DSN telemetry performance, but has significant advantages over a ground station, and these are sufficient to maintain it as a future option. These advantages include: the ability to track a spacecraft 24 hours per day with ground stations located only in the USA; the ability to operate at higher frequencies that would be attenuated by Earth's atmosphere; and the potential for building very large structures without the constraints of Earth's gravity

Orbiting deep space relay station. Volume 3: Implementation plan

An implementation plan for the Orbiting Deep Space Relay Station (ODSRS) is described. A comparison of ODSRS life cycle costs to other configuration options meeting future communication requirements is presented

An empirical investigation of the relationship between the real economy and stock returns for the United States

This paper tests for the relationship between excess returns and economic growth rates in the U.S., using a Seemingly Unrelated Regression (SUR) approach. The system includes monthly data for inflation, consumption, narrow money supply and personal disposable income and each equation has up to 24-lagged Autoregressive terms. After removing the four major shocks associated with Black Monday, the Asian Crisis, “9·11” and its anniversary, we cannot find any ARCH behaviour in either the excess returns or the money series. The models are reduced to their parsimonious forms and the inflation and real consumption equations are corrected for ARCH. To make the result more robust we reduce our system to four equations by conditioning on income and testing the remaining equations for stability. The SUR model suggests strong long-run feedback between the financial sector and the real economy firstly through inflation, then consumption while the influence of real money supply appears transitory. Consumption is more sensitive to the economic variables in short and long run as compared with stock market windfalls

Current trends in the use of residential child care in Scotland

The survey was planned to examine how local authority residential care units were currently being used and to provide data relating to current issues in the use of residential child care. These issues were identified by Scottish Institute for Residential Child Care (SIRCC) staff as they provided training and development work with agencies across Scotland, and others have been part of wider professional and political concerns. They include matters such as the increasing numbers of children being admitted to care because of parentaldrug misuse. There is also anecdotal evidence about increasing numbers of seriously disturbed younger children having to be admitted to residential care because their difficulties preclude them being cared for in a foster home placement, or who had experienced a number of foster placement breakdowns. SIRCC provides a ‘Placement Information Service’ and over the past few years there has been a steady stream of enquiries from social workers looking for a ‘therapeutic placement’ for a younger child. There were also reports of sibling groups still being regularly split up on admission due to lack of places and a general reporting of a shortage of places. Noteworthy also has been the continued high level of emergency placements. As there has been a gradual reduction in residential places over the past 10 to15 years and as residential care is perceived to be an expensive resource it is important to understand what kinds of admissions are putting such pressure on existing resources. The survey therefore requested information about a wide range of topics related to admission to residential care including: age at admission length of stay; previous placement; whether placement was planned or not;whether siblings groups were kept together or not; whether the child was in full-time education or not; the reasons for admission including parental drug misuse; whether the placement was the placement of choice of the socialworker or residential services manager. The survey also asked respondents to give a broad measure of the effectiveness of the placement. It was hoped that the data might supplement the Looked After Children (LAC) statistics that are published annually by the Scottish Executive (SE), based onreturns from local authorities

Evaluation of fostering network Scottish care mentoring projects

Looked after children and young people are some of the most vulnerable in our society. For Scotland’s Children highlighted the ‘continuing failure of many local authorities as ‘corporate parents’ to provide these young people with the care and education they are entitled to by law’ (Scottish Executive, 2001, p. 10). One of the major issues facing looked after young people is the process of transition from care to independence. It is a time when they have ‘a right to expect the sort of help that loving parents would provide for their children, help to reach their full potential, and the same chance to make mistakes secure in the knowledge that there is a safety net of support’ (Jamieson, 2002, p. 2). However, over a number of years, research has highlighted the poor outcomes for children leaving care. Longitudinal studies which have followed up children and young people in care as part of national cohort studies present the stark contrast in life outcomes between those who have experienced care and those who have not. Cheung and Heath (1994) compare these two groups at age 33. Only one fifth of those who had been in care had achieved O levels compared to one-third of those who had not; only half as many had achieved A levels. Only one in a hundred of those who had been in care achieved a university degree compared to one on ten of those who had not. Two fifths of those who had been in care had no formal qualifications compared to one in seven (Cheung and Heath, 1994). This lack of qualifications converted into lack of success in the job market with three times as many being unemployed (10.8 % compared to 3.6 %) and larger proportions having manual jobs as opposed to professional or non-manual jobs

Soft computing in investment appraisal

Standard financial techniques neglect extreme situations and regards large market shifts as too unlikely to matter. Such approach accounts for what occurs most of the time in the market, but does not reflect the reality, as major events happen in the rest of the time and investors are ‘surprised’ by ‘unexpected’ market movements. An alternative fuzzy approach permits fluctuations well beyond the probability type of uncertainty and allows one to make fewer assumptions about the data distribution and market behaviour. Fuzzifying the present value criteria, we suggest a measure of the risk associated with each investment opportunity and estimate the project’s robustness towards market uncertainty. The procedure is applied to thirty-five UK companies traded on the London Stock Exchange and a neural network solution to the fuzzy criterion is provided to facilitate the decision-making process. Finally, we suggest a specific evolutionary algorithm to train a fuzzy neural net - the bidirectional incremental evolution will automatically identify the complexity of the problem and correspondingly adapt the parameters of the fuzzy network

Interoperable services based on activity monitoring in ambient assisted living environments

Ambient Assisted Living (AAL) is considered as the main technological solution that will enable the aged and people in recovery to maintain their independence and a consequent high quality of life for a longer period of time than would otherwise be the case. This goal is achieved by monitoring human’s activities and deploying the appropriate collection of services to set environmental features and satisfy user preferences in a given context. However, both human monitoring and services deployment are particularly hard to accomplish due to the uncertainty and ambiguity characterising human actions, and heterogeneity of hardware devices composed in an AAL system. This research addresses both the aforementioned challenges by introducing 1) an innovative system, based on Self Organising Feature Map (SOFM), for automatically classifying the resting location of a moving object in an indoor environment and 2) a strategy able to generate context-aware based Fuzzy Markup Language (FML) services in order to maximize the users’ comfort and hardware interoperability level. The overall system runs on a distributed embedded platform with a specialised ceiling- mounted video sensor for intelligent activity monitoring. The system has the ability to learn resting locations, to measure overall activity levels, to detect specific events such as potential falls and to deploy the right sequence of fuzzy services modelled through FML for supporting people in that particular context. Experimental results show less than 20% classification error in monitoring human activities and providing the right set of services, showing the robustness of our approach over others in literature with minimal power consumption