Explicit diversification of event aspects for temporal summarization

During major events, such as emergencies and disasters, a large volume of information is reported on newswire and social media platforms. Temporal summarization (TS) approaches are used to automatically produce concise overviews of such events by extracting text snippets from related articles over time. Current TS approaches rely on a combination of event relevance and textual novelty for snippet selection. However, for events that span multiple days, textual novelty is often a poor criterion for selecting snippets, since many snippets are textually unique but are semantically redundant or non-informative. In this article, we propose a framework for the diversification of snippets using explicit event aspects, building on recent works in search result diversification. In particular, we first propose two techniques to identify explicit aspects that a user might want to see covered in a summary for different types of event. We then extend a state-of-the-art explicit diversification framework to maximize the coverage of these aspects when selecting summary snippets for unseen events. Through experimentation over the TREC TS 2013, 2014, and 2015 datasets, we show that explicit diversification for temporal summarization significantly outperforms classical novelty-based diversification, as the use of explicit event aspects reduces the amount of redundant and off-topic snippets returned, while also increasing summary timeliness

Closing the loop: assisting archival appraisal and information retrieval in one sweep

In this article, we examine the similarities between the concept of appraisal, a process that takes place within the archives, and the concept of relevance judgement, a process fundamental to the evaluation of information retrieval systems. More specifically, we revisit selection criteria proposed as result of archival research, and work within the digital curation communities, and, compare them to relevance criteria as discussed within information retrieval's literature based discovery. We illustrate how closely these criteria relate to each other and discuss how understanding the relationships between the these disciplines could form a basis for proposing automated selection for archival processes and initiating multi-objective learning with respect to information retrieval

Corporate strategy revisited: A view from complexity theory

Despite its long tradition and well known contributions, corporate strategy research is yet far from being mature. This paper proposes an innovative framework that approaches the field from the theoretical perspective provided by complexity theory. We propose to see the corporate level of the organization as the driver, pacer and framer of the overall firm's evolution process. Drive is provided by the cognitive representation of the corporate fitness landscape that is implicit in the firm's corporate plan. Pacing is a consequence of the kind of strategic initiatives ("search strategy") developed by the company. Framing is achieved through the architectural design that the corporate level implements for the firm.corporate strategy; complexity theory; self-organizing;

Policies for promoting technological catch up: a post-Washington approach

This paper analyzes the evolution of policies for technology catch-up through three periods: the import substitution period, the (augmented) Washington Consensus period and the post-Washington period. We analyze the dominant policy models and practices in each of these periods as co-evolving with the dominant academic ideas, thereby changing the conditions for catching up. We develop several dimensions or building blocks that characterize the policies for technology catch-up. These dimensions are used to characterize each of the three policy periods with the objective of outlining the generic features of an emerging post-Washington approach to technology catch-up policies in relation to past approaches

Alternative frameworks for providing financial services

Drawing on country experience, the authors analyze alternative frameworks for providing financial services. Scope of permissible activities: The integrated banking model (commercial banking fully integrated with other financial services, including investment banking) benefits both financial institutions and consumers. Potential costs, such as extending the safety net to non-deposit financial services, can be mitigated with safeguards and firewalls, which require regulatory enforcement and monitoring. Internationally, countries are moving toward the integrated model. The wider scope of services appears to improve financial stability and mitigate the risk of a banking crisis. Degree of competitiveness and contestability (openness to competition): Competitiveness need not only require many financial institutions; a concentrated system can be competitive if contestable. Allowing the liberal entry of foreign banks lowers the franchise value of (domestic) institutions, but the evidence suggests that on balance foreign entry provides important benefits. Systems should not be over-competitive, however. They should allow enough franchise value that future profits give institutions an incentive to behave prudently. Design of safety net: the design of the safety net is important in the tradeoff between ensuring the safety and soundness of financial institutions and allocating resources efficiently. A well-functioning safety net minimizes regulatory forbearance and gives banks incentives to act prudently. Owners of financial institutions behave more prudently if they have much at risk, in the form of capital, future expected profits, or their own jobs. The wrong safety net, especially the wrong deposit insurance, entails great moral hazard. Large deposit holders are more likely to provide market discipline if they are not covered by deposit insurance (explicit or implicit), if disclosure is extensive, and if the accounting framework is adequate. Supervision: Best international practice suggests that supervision of the financial conglomerate should probably be consolidated in one agency. Supervisors should have incentives both to monitor and to take appropriate action. Supervisory salaries should be sufficient, relative to those in the private sector, to attract and retain competent and motivated staff.Payment Systems&Infrastructure,Banks&Banking Reform,Environmental Economics&Policies,Financial Intermediation,Labor Policies,Banks&Banking Reform,Financial Intermediation,Environmental Economics&Policies,Knowledge Economy,Education for the Knowledge Economy

Policies for promoting technological catching up: towards post-Washington approach

This paper analyses the evolution of policies for technology catch-up through three periods: import-substitution, (augmented) Washington consensus and post-Washington period. We analyse the dominant policy models and practices in each of these periods as co-evolving with the dominant academic ideas, and changing the conditions for catching-up. We develop several dimensions or building blocks that characterise the policies for technology catch-up. These dimensions are used to characterise each of the three policy periods with the objective of outlining the generic features of an emerging post-Washington approach to technology catch-up policies in relation to past approaches