The Oyster River Culvert Analysis Project

Studies have already detected intensification of precipitation events consistent with climate change projections. Communities may have a window of opportunity to prepare, but information sufficiently quantified and localized to support adaptation programs is sparse: published literature is typically characterized by general resilience building or regional vulnerability studies. The Fourth Assessment Report of the IPCC observed that adaptation can no longer be postponed pending the effective elimination of uncertainty. Methods must be developed that manage residual uncertainty, providing community leaders with decision-support information sufficient for implementing infrastructure adaptation programs. This study developed a local-scale and actionable protocol for maintaining historical risk levels for communities facing significant impacts from climate change and population growth. For a coastal watershed, the study assessed the capacity of the present stormwater infrastructure capacity for conveying expected peak flow resulting from climate change and population growth. The project transferred coupled-climate model projections to the culvert system, in a form understandable to planners, resource managers and decision-makers; applied standard civil engineering methods to reverse-engineer culverts to determine existing and required capacities; modeled the potential for LID methods to manage peak flow in lieu of, or combination with, drainage system upsizing; and estimated replacement costs using local and national construction cost data. The mid-21st century, most likely 25-year, 24-hour precipitation is estimated to be 35% greater than the TP-40 precipitation for the SRES A1b trajectory, and 64% greater than the TP-40 value for the SRES A1fi trajectory. 5% of culverts are already undersized for the TP-40 event to which they should have been designed. Under the most likely A1b trajectory, an additional 12% of culverts likely will be undersized, while under the most likely A1fi scenario, an additional 19% likely will be undersized. These conditions place people and property at greater risk than that historically acceptable from the TP-4025-year design storm. This risk level may be maintained by a long-term upgrade program, utilizing existing strategies to manage uncertainty and costs. At the upper-95% confidence limit for the A1fi 25-year event, 65% of culverts are adequately sized, and building the remaining 35%, and planned, culverts to thrice the cross-sectional area specified from TP-40 should provide adequate capacity through this event. Realizable LID methods can mitigate significant impacts from climate change and population growth, however effectiveness is limited for the more pessimistic climate change projections. Results indicate that uncertainty in coupled-climate model projections is not an impediment to adaptation. This study makes a significant contribution toward the generation of reliable and specific estimates of impacts from climate change, in support of programs to adapt civil infrastructures. This study promotes a solution to today\u27s arguably most significant challenge in civil infrastructure adaptation: translating the extensive corpus of adaptation theory and regional-scale impacts analyses into localscale action

Optimizing Gradual SDN Upgrades in ISP Networks

Nowadays, there is a fast-paced shift from legacy telecommunication systems to novel software-defined network (SDN) architectures that can support on-the-fly network reconfiguration, therefore, empowering advanced traffic engineering mechanisms. Despite this momentum, migration to SDN cannot be realized at once especially in high-end networks of Internet service providers (ISPs). It is expected that ISPs will gradually upgrade their networks to SDN over a period that spans several years. In this paper, we study the SDN upgrading problem in an ISP network: which nodes to upgrade and when we consider a general model that captures different migration costs and network topologies, and two plausible ISP objectives: 1) the maximization of the traffic that traverses at least one SDN node, and 2) the maximization of the number of dynamically selectable routing paths enabled by SDN nodes. We leverage the theory of submodular and supermodular functions to devise algorithms with provable approximation ratios for each objective. Using real-world network topologies and traffic matrices, we evaluate the performance of our algorithms and show up to 54% gains over state-of-the-art methods. Moreover, we describe the interplay between the two objectives; maximizing one may cause a factor of 2 loss to the other. We also study the dual upgrading problem, i.e., minimizing the upgrading cost for the ISP while ensuring specific performance goals. Our analysis shows that our proposed algorithm can achieve up to 2.5 times lower cost to ensure performance goals over state-of-the-art methods.EC/H2020/679158/EU/Resolving the Tussle in the Internet: Mapping, Architecture, and Policy Making/ResolutioNe

A quiet flow Ludwieg tube for study of transition in compressible boundary layers: Design and feasibility

Since Ludwieg tubes have been around for many years, and NASA has already established the feasibility of creating quiet-flow wind tunnels, the major question addressed was the cost of the proposed facility. Cost estimates were obtained for major system components, and new designs which allowed fabrication at lower cost were developed. A large fraction of the facility cost comes from the fabrication of the highly polished quiet-flow supersonic nozzle. Methods for the design of this nozzle were studied at length in an attempt to find an effective but less expensive design. Progress was sufficient to show that a quality facility can be fabricated at a reasonable cost

Implementation of Ururguay Round commitments : the development challenge

At the Uruguay Round, developing countries took on unprecedented obligations not only to reduce trade barriers, but to implement significant reforms both of trade procedures, e.g., import licensing procedures, customs valuation and of many areas of regulation that establish the basic business environment in the domestic economy, e.g., technical, sanitary and phytosanitary standards (SPS), intellectual property law. Implementing such reforms are investment decisions in that implementation will require purchase of equipment, training of people, establishment of systems of checks and balances, etc. This will cost money and the amounts of money involved are substantial. Based on World Bank project experience in the areas covered by the agreements, an entire year's development budget is at stake in many of the least developed countries. Least developed country institutions in these areas are weak, and would benefit from strengthening and reform. However, the authors'analysis indicates that the World Trade Organization (WTO) obligations reflect little awareness of development problems and little appreciation of the capacities of the least developed countries to carry out the functions that SPS, customs valuation, intellectual property, etc. regulations address. The content of these obligations can be characterized as the advanced countries saying to the others,"Do it my way!"The authors touch at the beginning on another important point. Because of their limited capacity to participate in the Uruguay Round negotiations, the WTO process has generated no sense of"ownership"of the reforms to which WTO membership obligates them. From their perspective, the implementation exercise has been imposed in an imperial way, with little concern for what it will cost, how it will be done, or if it will support their development efforts.Economic Theory&Research,Judicial System Reform,Rules of Origin,Environmental Economics&Policies,Customs Administration,Economic Theory&Research,Rules of Origin,Trade and Regional Integration,Environmental Economics&Policies,Customs Administration

Municipal Infrastructure Delivery in Ethiopia: A bottomless pit or an option to reach the Millennium Development Goals?

The following paper examines the different options to finance local public infrastructure in Ethiopia based on the assumption that the federal government of Ethiopia will not provide any guarantees for local borrowing. Besides a detailed description of the local public finance system and the capital market in Ethiopia, the paper also sets out some international successful practices in municipal infrastructure financing. Based on the observation of the Ethiopian case and the consideration of the international experiences, the paper has two major pillars that very specifically identify actions required for implementation. On the one hand, the paper recommends a number of feasible arrangements to generate a revenue enhancement of the local authorities in the existing intergovernmental framework. On the other hand, the paper suggests a solution - for creditworthy as well as for potentially creditworthy urban local governments (ULG) - to finance their future demand of public infrastructure together with the national finance institutions as well as the international donors.Fiscal Federalism, Grants, Ethiopia, Urban and Rural Economies

A quiet flow Ludwieg tube for study of transition in compressible boundary layers: Design and feasibility

Laminar-turbulent transition in high speed boundary layers is a complicated problem which is still poorly understood, partly because of experimental ambiguities caused by operating in noisy wind tunnels. The NASA Langley experience with quiet tunnel design has been used to design a quiet flow tunnel which can be constructed less expensively. Fabrication techniques have been investigated, and inviscid, boundary layer, and stability computer codes have been adapted for use in the nozzle design. Construction of such a facility seems feasible, at a reasonable cost. Two facilities have been proposed: a large one, with a quiet flow region large enough to study the end of transition, and a smaller and less expensive one, capable of studying low Reynolds number issues such as receptivity. Funding for either facility remains to be obtained, although key facility elements have been obtained and are being integrated into the existing Purdue supersonic facilities

Management control: lecture notes

The main purpose of this book is to present a mainly financial, but also economic, view of the functioning of organizations, with theoretical and conceptual basis for the practice of financial project analysis capable of sustaining investment decisions and increasing the value of organizations. It also intends to able practitioners to use their practical need toward informed financial decisions in a range of engineering areas: mechanical, civil, industrial or manufacturing, among others.info:eu-repo/semantics/publishedVersio

Namibia's social safety net : issues and options for reform

This report describes Namibia's social safety net and issues and options for reform. In Namibia, the extended family is a big shock absorber: informal sharing arrangements between and within households are Namibia's unique sources of strength. Grandparents contribute enormously to the continuation of this safety net by letting the entire family share their social pension in times of need, and by looking after their grandchildren while parents are away or are AIDS-infected. Yet, these informal safety nets are not robust during periods of drought, and are strained in normal times due to the high levels of unemployment and the growing burden of children of AIDS-infected parents. Of all the formal safety net programs, the social pension program and the disability grant touch the lives of the poor more than other programs. Namibia is one of the few countries in Africa to administer a social pension program for every individual after attaining the age of 60. The three main grants for needy children also suffer from regional asymmetry and are heavily urban-biased. The pro-urban and middle class bias appear highest for in-kind programs, viz., school feeding programs and shelter/housing programs. Up gradation of squatter settlements and single-room apartments, and provision water and sanitation facilities are a priority; public resources need to be reallocated to those programs of direct relevance to the rural poor. The country has many other transfer programs including subsidization of welfare homes and remission of rent for apartments with overdue rents. The impact of these programs on poverty appears at best dubious. Elimination of these programs will release the administrative resources needed to implement social pensions and disability grants more effectively. The resource savings may contribute to overall fiscal sustainability of programs. The principal conclusion of this study is while the informal safety net is unable to cope with the increasing demands, the formal programs are too many and poorly administer.Services&Transfers to Poor,Public Health Promotion,Health Monitoring&Evaluation,Poverty Impact Evaluation,Banks&Banking Reform,Services&Transfers to Poor,Poverty Assessment,Health Monitoring&Evaluation,Rural Poverty Reduction,Safety Nets and Transfers

C-ITS road-side unit deployment on highways with ITS road-side systems : a techno-economic approach

Connectivity and cooperation are considered important prerequisites to automated driving, as they are crucial elements in increasing the safety of future automated vehicles and their full integration in the overall transport system. Although many European Member States, as part of the C-Roads Platform, have implemented and are still implementing Road-side Units (RSUs) for Cooperative Intelligent Transportation Systems (C-ITS) within pilot deployment projects, the platform aspires a wide extension of deployments in the coming years. Therefore, this paper investigates techno-economic aspects of C-ITS RSU deployments from a road authority viewpoint. A two-phased approach is used, in which firstly the optimal RSU locations are determined, taking into account existing road-side infrastructure. Secondly, a cost model translates the amount of RSUs into financial results. It was found that traffic density has a significant impact on required RSU density, hence impacting costs. Furthermore, major cost saving can be obtained by leveraging existing road-side infrastructure. The proposed methodology is valuable for other member states, and in general, to any other country aspiring to roll out C-ITS road infrastructure. Results can be used to estimate required investment costs based on legacy infrastructure, as well as to benchmark with the envisioned benefits from the deployed C-ITS services