An approach for assessing software prototypes

A procedure for evaluating a software prototype is presented. The need to assess the prototype itself arises from the use of prototyping to demonstrate the feasibility of a design or development stategy. The assessment procedure can also be of use in deciding whether to evolve a prototype into a complete system. The procedure consists of identifying evaluations criteria, defining alterative design approaches, and ranking the alternatives according to the criteria

East Timor's transition to independence: Building up an economy from scratch

After the extensive destruction caused by the violence that followed the vote for independence on August 30th, 1999, the reconstruction of East Timor's infrastructure inevitably was the top priority. Supported by massive aid inflows, achievements in this area have been quite remarkable. As a result, East Timor's production capacity is likely to return to pre-crisis levels within a few years. The much more difficult task is to initiate and then sustain a long-run development process. This requires a whole bundle of measures of which only a part has been introduced up to now. At the macroeconomic level, three policy areas figure most prominently. First, to ensure a certain degree of macroeconomic stability as a prerequisite for growth, it is recommended to implement a combination of a Currency Board regime for the exchange rate and a sound fiscal policy based on a broad domestic revenue base. Second, permanent growth can only be achieved via the accumulation of physical and human capital. Secure property rights and a transparent investment code are among the essential conditions for physical capital formation. Human capital formation can be fostered by reallocating public resources towards basic services, which were seriously neglected under Indonesian rule. Third, a country like East Timor with its very small domestic market and its limited technical knowledge can reap large benefits from adopting an open trade and foreign investment regime. From a sectoral perspective, agriculture will remain the backbone of the economy in the foreseeable future. Incentives that lead to a more dynamic development of this sector are thus of particular importance, not only for growth but also for poverty alleviation as the vast majority of poor people live in rural areas. Such incentives include a market-oriented pricing policy, a stable and competitive exchange rate, access to credit, a basic rural infrastructure, and the provision of adequate research and extension facilities. A development strategy based on agriculture alone would, however, leave the economy vulnerable to shocks. Only a diversification of production will open the way to more robust growth. One significant step in this direction could be the exploitation of existing oil fields. If future oil revenues live up to expectations, the main policy challenge will be to avoid an overvaluation of the domestic currency (Dutch Disease). In the medium run, the establishment of labor-intensive industries could be another step towards a more diversified economy. Whether this option can be realized will depend to a large extent on East Timor's ability to import capital and know-how via foreign direct investment. Overall, if political stability prevails, the outlook for sustained progress seems better than in many other low-income countries, where the international community is less consistently engaged and where much stronger vested interests block reform efforts. At the moment, the most significant danger for long-term development in East Timor arises from the uncertainty of land and property rights, which is likely to hamper investment and agricultural development. Moreover, it has to be kept in mind that various important measures, such as investments in education, will take considerable time to materialize fully. --

Part 4: The payments system and the market for interbank funds

The Federal Reserve Bank of New York released a report -- New Directions for Understanding Systemic Risk -- that presents key findings from a cross-disciplinary conference that it cosponsored in May 2006 with the National Academy of Sciences' Board on Mathematical Sciences and Their Applications. ; The pace of financial innovation over the past decade has increased the complexity and interconnectedness of the financial system. This development is important to central banks, such as the Federal Reserve, because of their traditional role in addressing systemic risks to the financial system. ; To encourage innovative thinking about systemic issues, the New York Fed partnered with the National Academy of Sciences to bring together more than 100 experts on systemic risk from 22 countries to compare cross-disciplinary perspectives on monitoring, addressing and preventing this type of risk. ; This report, released as part of the Bank's Economic Policy Review series, outlines some of the key points concerning systemic risk made by the various disciplines represented - including economic research, ecology, physics and engineering - as well as presentations on market-oriented models of financial crises, and systemic risk in the payments system and the interbank funds market. The report concludes with observations gathered from the sessions and a discussion of potential applications to policy. ; The three papers presented in this conference session highlighted the positive feedback effects that produce herdlike behavior in markets, and the subsequent discussion focused in part on means of encouraging heterogeneous investment strategies to counter such behavior. Participants in the session also discussed the types of models used to study systemic risk and commented on the challenges and trade-offs researchers face in developing their models.Financial risk management ; Financial markets ; Financial stability ; Financial crises

The Post Carbon City and Smart Metering

Buildings and districts are an appropriate focus for smart metering infrastructure in the urban environment. While properties and buildings have traditionally been metered for revenue recovery purposes, energy management of these buildings has not been available. In the way we account for money, we should account for energy; energy in its own right carries a direct cost with it to the end user. Along with carrying a cost, energy also carries carbon emissions. Smart meters are a vital component to the making and management of post carbon cities and can be used to monitor not only electricity use but also water and gas consumption. Energy Management Systems combined with structured metering also enable consumers with renewable energy generation such as photovoltaic (PV) panels to monitor their own generation, consumption, import and export. As battery storage becomes integrated with renewable energy generation, consumers will have the ability to consume cheaper renewable energy than can be bought from the grid and sell energy back to the grid at the most economically viable times. While uncertainty surrounds the grid and its impact on rising electricity prices, smart metering, intelligent control systems and utilities offering consumers more amenities and the ability for consumers to participate in the wholesale market will ensure the smart grid can contribute to future carbon neutral urban environments

Preliminary Design and Simulation of a Thermal Management System with Integrated Secondary Power Generation Capability for a Mach 8 Aircraft Concept Exploiting Liquid Hydrogen

This paper introduces the concept of a thermal management system (TMS) with integrated on-board power generation capabilities for a Mach 8 hypersonic aircraft powered by liquid hydrogen (LH2). This work, developed within the EU-funded STRATOFLY Project, aims to demonstrate an opportunity for facing the challenges of hypersonic flight for civil applications, mainly dealing with thermal and environmental control, as well as propellant distribution and on-board power generation, adopting a highly integrated plant characterized by a multi-functional architecture. The TMS concept described in this paper makes benefit of the connection between the propellant storage and distribution subsystems of the aircraft to exploit hydrogen vapors and liquid flow as the means to drive a thermodynamic cycle able, on one hand, to ensure engine feed and thermal control of the cabin environment, while providing, on the other hand, the necessary power for other on-board systems and utilities, especially during the operation of high-speed propulsion plants, which cannot host traditional generators. The system layout, inspired by concepts studied within precursor EU-funded projects, is detailed and modified in order to suggest an operable solution that can be installed on-board the reference aircraft, with focus on those interfaces impacting its performance requirements and integration features as part of the overall systems architecture of the plane. Analysis and modeling of the system is performed, and the main results in terms of performance along the reference mission profile are discussed

An innovative framework for chemical and process facilities to support a comprehensive Natech risk assessment

The interaction between natural hazards and technological installations handling hazardous materials can produce complex cascading accidents termed as Natech events. Climate change and increasing vulnerability of industrial facilities caused a growing concern towards Natech hazards in recent years. Current methodologies addressing the identification and quantification of Natech scenarios mostly consider only the possibility of direct damage of process and storage equipment caused by natural hazards as earthquakes and floods. Nevertheless, recent severe Natech events as the Arkema accident (2017) demonstrated that the direct failure of equipment is not the sole possible accident trigger. Indeed, in these events the accident sequence was initiated by the impairment of auxiliary systems and utilities induced by the natural event. The present contribution proposes an innovative comprehensive framework to the identification of Natech scenarios and to the quantitative assessment of Natech risk. The new framework presented addresses the identification of both direct and indirect Natech scenarios and considers the possible failure of utilities in the evolution of the accident chain and in the escalation of accident consequences. Specific strategies for the identification of alternative routes leading to Natech events are suggested, considering loss of containment events caused either by the direct damage of equipment or by the failure of utilities or safety barriers. A test-case was defined to show the application of the framework. The results demonstrated the importance of the indirect route in determining the overall hazard due to Natech events when specific categories of hazardous substances are present on the site

A study of the very high order natural user language (with AI capabilities) for the NASA space station common module

The requirements are identified for a very high order natural language to be used by crew members on board the Space Station. The hardware facilities, databases, realtime processes, and software support are discussed. The operations and capabilities that will be required in both normal (routine) and abnormal (nonroutine) situations are evaluated. A structure and syntax for an interface (front-end) language to satisfy the above requirements are recommended

CERN openlab Whitepaper on Future IT Challenges in Scientific Research

This whitepaper describes the major IT challenges in scientific research at CERN and several other European and international research laboratories and projects. Each challenge is exemplified through a set of concrete use cases drawn from the requirements of large-scale scientific programs. The paper is based on contributions from many researchers and IT experts of the participating laboratories and also input from the existing CERN openlab industrial sponsors. The views expressed in this document are those of the individual contributors and do not necessarily reflect the view of their organisations and/or affiliates

Introducing Price Signals into Land Use Planning Decision-making - a Proposal

Although directed to the British system of land use planning this paper has relevance for many OECD countries. The paper starts by characterising the basic features of planning systems which seek to impose 'growth boundaries' as has been the case in Britain since 1947. In contrast to the planning literature this analyses such policies as an issue of resource allocation. A conclusion is that the system explicitly excludes any use of price signals from its decisions and effectively determines the supply of land for any use by fiat. Cumulatively over time the result has been to generate major distortions in land market prices. Because the planning system has deliberately constrained the supply of space, and space is an attribute of housing which is income elastic in demand, rising incomes not only drive rising real house prices but also mean that land prices have risen considerably faster than house prices. Several housing attributes other than garden space are to a degree substitutes for land but the underlying cause of the inelastic supply of housing in the UK is the constraint on land supply. The final section proposes a way of including the information embodied in the price premiums of neighbouring parcels of land zoned for different uses in determining land supply while safeguarding the underlying purposes of land use regulation. Such premiums signal the relative scarcity of land for different uses at each location and should become a key element in planning decision-making. If they were above some threshold, this should provide a presumption of development unless maintaining the land in its current use could be shown to be in the public interest. If combined with Impact Fees, such a change would not only make housing supply more elastic and the system more transparent but would help to distance land availability decisions from the political process.