A methodological approach to BISDN signalling performance

Sophisticated signalling protocols are required to properly handle the complex multimedia, multiparty services supported by the forthcoming BISDN. The implementation feasibility of these protocols should be evaluated during their design phase, so that possible performance bottlenecks are identified and removed. In this paper we present a methodology for evaluating the performance of BISDN signalling systems under design. New performance parameters are introduced and their network-dependent values are extracted through a message flow model which has the capability to describe the impact of call and bearer control separation on the signalling performance. Signalling protocols are modelled through a modular decomposition of the seven OSI layers including the service user to three submodels. The workload model is user descriptive in the sense that it does not approximate the direct input traffic required for evaluating the performance of a layer protocol; instead, through a multi-level approach, it describes the actual implications of user signalling activity for the general signalling traffic. The signalling protocol model is derived from the global functional model of the signalling protocols and information flows using a network of queues incorporating synchronization and dependency functions. The same queueing approach is followed for the signalling transfer network which is used to define processing speed and signalling bandwidth requirements and to identify possible performance bottlenecks stemming from the realization of the related protocols

Blended Value Investing: Capital Opportunities for Social and Environmental Impact

This paper is offered not as a fully comprehensive survey of the emerging area of blended value investing, but rather as a set of examples of how such investing practices are being developed and applied around the world. The paper's intent is not to provide a single answer for all investment challenges, but to demonstrate how groups of investors are mobilizing capital on new terms to meet the challenges of emerging investment opportunities, as well as the demands of investors seeking out new asset classes in which to place their capital.This paper presents innovations in capital finance that promise to bridge market-rate interests with strategic opportunities to create blended value that benefits shareholder and stakeholder alike. The following examples speak to an evolving capital convergence wherein mainstream capital markets and investing will increasingly become drivers of new solutions to historic problems. Blended value investing funds and instruments offer financing strategies a set of tools that go beyond traditional philanthropy or market rate investing and which complement the vision we all share of a world with greater equity and opportunity for its members.This paper also identifies several areas of research that would help advance the field of blended value investing. Finally, the paper concludes with words of caution that suggest a prudent approach to developing blended value capital markets. It offers a critique of the state of the markets, presents a strategic vision for the blended value capital markets, and suggests specific steps that participants might take in moving toward the ideal

The Pro-Western Turn in Russia's Foreign Policy: Causes, Consequences and Prospects. OSW Point of View, September 2002

From Europe and Poland's point of view, one of the most important recent developments in international politics was the re-orientation of Russia's foreign policy. This paper aims to answer three important questions relating to this issue: 4. When and why did the "pro-Western turn" in the Russian Federation's policy take place? 5. Has it been profitable for Russia? 6. What goals will the Russian policy pursue in the future? An analysis of the last two years in Russia's foreign policy leads to the several conclusions, including those: 5. Clearly, the Russian leaders realise that in the longer term, Russia - in its desire for more influence in the world - will not be able to survive as an independent pole of power in international politics and it will have to join forces with the West (most likely, the European Union). 6. September 11 was not the cause of Russia's pro-Western turn, but rather a catalyst that put the process which started when Vladimir Putin took his office in sharp focus. 7. In the nearest future, this new direction of Russia's foreign policy seems not be challenged by internal opposition in Russia. 8. The "pro-Western turn" proved to be beneficial for Russia, although: d. Russia has not become a strategic ally of the US e. There has been no breakthrough in the relations between Russia and the European Union, and Moscow has not gained any real influence on NATO's important decisions. f. Russia has not become a major decision-maker of international politics. 5. Russia's closing to the West is in Poland's and Europe's interest

Remittances and Children's Capabilities: New Evidence from Kyrgyzstan, 2005-2008

The Kyrgyz Republic is one of the largest recipients of international remittances in the world; from a Balance of Payments measure of remittances, it ranked tenth in the world in 2008 in the ratio of remittances to GDP, a rapid increase from 30th place in 2004.Remittances can be used to maintain the household's standard of living by providing income to families with unemployed and underemployed adult members. Remittances can also be used to promote investment not only in businesses and communities but also in people. In this paper, we examine the role that remittances have played in the Kyrgyz Republic in promoting investments in children. Based on the capabilities approach to well-being initiated by Sen (2010), we look at the impact of remittances and domestic transfer payments primarily from internal migration on children's education and health. Our outcomes include enrollment in school and preschool, expenditures, stunting and wasting of preschool children, and health habits of older children. We use unique panel data from the Kyrgyz Republic for 2005-2008 and thus control for some of the biases inherent in cross-sectional studies of remittances and family outcomes. We find that overall remittances and domestic transfers have not promoted investments in the human capital of children. Specifically, preschool enrollments were higher in the urban north but secondary school enrollments were lower in other regions in remittance receiving households; expenditures were also negatively affected in the south and the mountain areas. These negative enrollment results were larger for girls than for boys. We also found evidence of stunting and wasting among young children and worse health habits among boys in remittance or transfer receiving households. In the long run, Kyrgyzstan needs human capital development for growth; our results suggest that remittances are not providing the boost needed in human capital to promote development in the future.Children’s education and health, Remittances, Kyrgyzstan, Central Asia