Obstacles to measuring global output gaps

Monetary policymakers pay close attention to levels of resource use. In the past, the focus was largely on domestic slack. Now, some analysts contend the ongoing process of globalization requires policymakers to look at global slack as well.

Geoid, topography, and convection-driven crustal deformation on Venus

High-resolution Magellan images and altimetry of Venus reveal a wide range of styles and scales of surface deformation that cannot readily be explained within the classical terrestrial plate tectonic paradigm. The high correlation of long-wavelength topography and gravity and the large apparent depths of compensation suggest that Venus lacks an upper-mantle low-viscosity zone. A key difference between Earth and Venus may be the degree of coupling between the convecting mantle and the overlying lithosphere. Mantle flow should then have recognizable signatures in the relationships between surface topography, crustal deformation, and the observed gravity field

Flexural analysis of uplifted rift flanks on Venus

Knowledge of the thermal structure of a planet is vital to a thorough understanding of its general scheme of tectonics. Since no direct measurements of heat flow or thermal gradient are available for Venus, most estimates have been derived from theoretical considerations or by analog with the Earth. The flexural response of the lithosphere to applied loads is sensitive to regional thermal structure. Under the assumption that the yield strength as a function of depth can be specified, the temperature gradient can be inferred from the effective elastic plate thickness. Previous estimates of the effective elastic plate thickness of Venus range from 11-18 km for the foredeep north of Uorsar Rupes to 30-60 km for the annular troughs around several coronae. Thermal gradients inferred for these regions are 14-23 K km(exp -1) and 4-9 K km(exp -1) respectively. In this study, we apply the same techniques to investigate the uplifted flanks of an extensional rift. Hypotheses for the origin of uplifted rift flanks on Earth include lateral transport of heat from the center of the rift, vertical transport of heat by small-scale convection, differential thinning of the lithosphere, dynamical uplift, and isostatic response to mechanical uploading of the lithosphere. The 1st hypothesis is considered the dominant contributor to terrestrial rift flanks lacking evidence for volcanic activity, particularly for rift structures that are no longer active. In this study, we model the uplifted flanks of a venusian rift as the flexural response to a vertical end load

A second-order approximation for the variance of a renewal reward process

AbstractLet {C(t), t ⩾ 0} be a renewal reward process. We obtain the approximation Var C(t) = ct + d + o(1), and explicitly identify c and d

Assessment of Non-Indexed Open Access Journals Impact

The journal impact factor remains a controversial metric and its widespread adoption has critical implications for the development of open access journals not indexed by the Web of Science. The present study evolved from collaborations with editors of a small open-access locally published social sciences journal to assess its global reach and research value according to the professed scope and mission of the journal. Using a combination of Google Scholar and BePress data, we built a customized multifaceted framework to measure the success of this journal beyond citation counts. Our analysis incorporated the bibliometric concepts of popularity and prestige, as well as measures of readership and global reach in order to quantify the journal\u27s impact for prospective contributors. This poster will highlight the issues and benefits of using various types of data available to assess the impact of a journal