Zone measurements during wintertime in the Arctic. Comparision with recent measurements at the same places are made. Here the 30 hPa Temperatures are shown

Moon measurements made at Tromso, and at Spitzbergen, 70 and 78 N, back in the fifties have been re-evaluated. One has to take into account that the wedge calibration will change when the focussed image of the moon on the inlet slit is used. A correction was later decided to be used after several experiments in Dobsons Laboratory in Oxford. The absorption coefficients have been changed since the observations were taken and evaluated the first time. The re-evaluated ozone values have been plotted, in one diagram for Spitzbergen, and in one for Tromso. The zonal mean value for ozone is given as a reference. Ozone measurements from the winter season 1985/86 and 1986/87 made at the same places are presented. Here the daylight measurements are incorporated and also TIROS satellite data from single point data retrieval are given. The two winter seasons were very different. In the first we had a late final stratospheric warming, and in the other we had an early final stratospheric warming. This can be seen from the 30 millibar temperatures, provided by Barbara Naujokat, and plotted in the diagrams. Again the zonal mean values of ozone are given as reference

Quality Assurance for Civilian Mine and Munitions Clearance

Currently civilian mine-clearance operations are carried out according to military principles involving Standard Operating Procedures (SOP). SOPs, however, do not encompass quality assurance concepts, such as the ISO 9000 family, a set of standards developed by the International Standards Organization (ISO). These standards are typically used for civilian works

Regions of care: a political ecology of reciprocal materialities

Indigenous "country" or "land" is a region of reciprocities constituted through the relationships and obligations that preserve the continuity of life. It is a "region of care." In picking up and developing this phrase, this article opens a discussion about how regional political ecology can build from the materialist perspectives of contemporary scholarship and Indigenous politics. If, as some materialist scholars have argued, the political field in the Anthropocene is now more than ever an ecology of problems, how might regional political ecology use these perspectives to address the challenges of coexistence among humans, nonhumans, and other things? The article explores how praxis oriented around "regions of care" helps those involved in political-ecological work confront these challenges in an experimental politics that respects and works with nonhuman, material agencies through place-based relationships and networks. In this way, regional political ecology addresses the new environmental politics of the Anthropocene in a way that is attuned to the concerns of the many communities engaged in the challenges of coexistence. Key words: Anthropocene, Indigenous, materiality, political ecology, regio

Conservation Agriculture as Practised in Ghana

This case study presents the status of conservation agriculture in Ghana. It is one in a series of eight case studies about conservation agriculture in Africa, which were developed within the framework of a collaboration between CIRAD (French Agricultural Research Centre for International Development), FAO (Food and Agriculture Organization of the United Nations), RELMA-in-ICRAF (Regional Land Management Unit of the World Agroforestry Centre) and ACT (African Conservation Tillage Network)

A Young Globular Cluster in the Galaxy NGC 6946

A globular cluster ~15 My old that contains 5x10^5 Msun of stars inside an 11 pc radius has been found in the nearby spiral galaxy NGC 6946, surrounded by clouds of dust and smaller young clusters inside a giant circular bubble 300 pc in radius. At the edge of the bubble is an arc of regularly-spaced clusters that could have been triggered during the bubble's formation. The region is at the end of a spiral arm, suggesting an origin by the asymmetric collapse of spiral arm gas. The globular is one of the nearest examples of a cluster that is similar to the massive old globulars in the Milky Way. We consider the energetics of the bubble and possible formation mechanisms for the globular cluster, including the coalescence of smaller clusters.Comment: 20 pages, 7 figures, accepted for Astrophysical Journal Vol 535, June 1 200

Refreshing methods: reflections and provocations

This virtual special issue of Social & Cultural Geography is part of a series of retrospectives published in celebration of the journal’s twentieth anniversary. This issue features a selection of eight previously published articles on method that, taken together, highlight key themes and developments in methodological work since the journal’s inception in 2000. In this introduction, the editors introduce the featured articles and, engaging other notable publications in the journal, offer a framework for thinking about the twenty years of methodological work published in the pages of Social & Cultural Geography. We explore how these articles speak to current methodological issues and debates before concluding with a set of provocations for future methodological work

ISU Jazz Combo

Kemp Recital Hall Sunday Evening April 20, 1997 8:00 p.m

On the Size Difference between Red and Blue Globular Clusters

Several recent studies have reported a mean size difference of about 20% between the metal-rich and metal-poor subpopulations of globular clusters (GCs) in a variety of galaxies. In this paper we investigate the possibility that the size difference might be a projection effect, resulting from a correlation between cluster size and galactocentric distance, combined with different radial distributions of the GC subpopulations. We find that projection effects may indeed account for a size difference similar to the observed one, provided that there is a steep relation between GC size and galactocentric distance in the central parts of the GC system and that the density of GCs flattens off near the center in a manner similar to a King profile. For more centrally peaked distributions, such as a de Vaucouleurs law, or for shallower size-radius relations, projection effects are unable to produce the observed differences in the size distributions.Comment: 30 pages, including 14 figures and 2 tables. Accepted for publication in Ap