Seismic Noise Characteristics at the Romanian Broadband Seismic Network

The noise level of the Romanian broadband stations operating since 2006 has been studied in order to identify the variations in background seismic noise as a function of time of day, season, and particular conditions at the stations. Power spectral densities and their corresponding probability density functions are used in this paper to characterize the background seismic noise. At high frequencies (> 1 Hz), seismic noise seems to have cultural origin, since significant variations (up to 55 dB) between daytime and nighttime noise levels are observed at almost all of the stations. However, this variability appears not to influence the detection capabilities of the Romanian Seismic Network in case of intermediate-depth earthquakes and earthquakes with magnitude over 3.0. For smaller magnitude events (Mw < 3), we showed that the number of stations detecting an event decreases during daytime. We studied the seasonal variation of the seismic noise for primary and secondary microseisms (with emphasize for the latter) and we demonstrated that the noise levels are higher in winter than in summer. We also observed a shift of the double-frequency peak from lower periods in summer to longer periods in winter. The polarization analysis indicated that the main sources of secondary microseisms for stations close to the Black Sea are coming from the Black Sea, while for the others the main sources are found in the Mediterranean Sea and Atlantic Ocean. Finally, the analysis of the probability density functions for stations located in different geologic conditions has pointed out that the noise level is higher for stations sited on softer formations than those sited on hard rocks.     

The Two Social Philosophies of Ostroms' Institutionalism

The article argues that Ostroms' institutionalism has a dimension that is complex and profound enough to deserve to be considered a “social theory” or a “social philosophy.” The article pivots around the thesis that the “social philosophy” behind the Bloomington School's research agenda has in fact two facets that may or may not be consistent with each other. The article describes the main features of the two facets, offers a brief overview of the development of these ideas, and clarifies their relationship to Public Choice theory and alternative visions of public goods analysis, public administration, and governance. The argument goes further to raise the provocative question whether the two “social philosophies” involved in the approach undertaken by Elinor Ostrom and Vincent Ostrom are necessarily and inseparably connected with the rest of their research program.     

Kinds of environments—a framework for reflecting on the possible contours of a better world

One of the significant developments in the interdisciplinary field of judgment and decision making is the classification of environments as a function of (a) their capacity to enable people to learn from experience (kind environments vs. wicked environments) and (b) the consequences of having failed to understand and adapt to them (exacting environments vs. lenient environments). Based on the premise that ‘environment’ is a key geographical concept, I explore the usefulness of appropriating these classifications in geography and argue that they can stimulate normative work on the possible contours of a better world as well as illuminate in novel ways long‐standing geographical concerns with the problematic of fairness.     

A POLYMORPHIC APPROACH TO POLICY ANALYSIS: A CASE STUDY OF ONTARIO'S ETHANOL IN GASOLINE REGULATION

This article develops a “polymorphic” approach to policy analysis, that is, an approach that draws on multiple forms of spatial reasoning. Specifically, the proposed framework deploys scale and network not merely as epistemological devices that make sense of “horizontal” and “vertical” politico‐institutional structures, but as co‐constitutive ontological processes that involve an ever‐shifting interplay among legacies, rhythms, and events. This polymorphic approach, we argue, facilitates the identification and the examination of the mobilization of social networks and of the attendant cross‐scalar interactions that must be articulated whenever a given policy is framed as a sensible and politically viable place‐based solution. The novel conceptual framework is then applied to the empirical investigation of the formulation of the complex moral, political, and economic environment that enabled the emergence of Ontario's controversial Ethanol in Gasoline Regulation. Our polymorphic approach reveals how this regulation is a (failed) attempt to reconcile Canada's legacy as a resource‐based economy and Ontario's legacy as a manufacturing‐based economy where value is added, with the need for more rational and less harmful resource extraction and for greener fuels that can sustain the current order. We build on the lessons drawn from this case study to suggest that our approach has wider applicability in that it can help create a process‐oriented, dynamic, and multi‐dimensional geography of policy‐making.