The Design and Development of a Closed Chamber for the in‐situ Quantification of Dryland Soil Carbon Dioxide Fluxes

This paper describes the design features and capabilities of a portable automated in‐situ closed chamber (ISCC) for the quantification of CO₂ fluxes in dryland soils where both photosynthetic and respiratory components may be associated with a cyanobacterial crust. The processes of CO₂ flux in dryland soils are briefly described in order to clarify the conditions that make quantification of these fluxes problematic. The instrumentation currently available for in‐situ soil CO₂ flux measurements is then reviewed demonstrating their inadequacies for the dryland environment. The ISCC described here is a member of the closed or enrichment class of soil respiration chambers. The ISCC, however, features an optical window possessing high (>90%) transmission in the photosynthetic active region (PAR) of the solar irradiance spectrum, permitting observations of photosynthesis. The ISCC possesses automatic venting and purging so that gaseous concentrations inside the chamber do not change from ambient sufficiently to significantly affect diffusion. The ISCC features both active and passive cooling employing internal solid‐state Peltier coolers and external aluminised Mylar respectively. This avoids severe disturbance of the microclimate within the chamber due to admission of high fluxes of PAR and permits in‐situ operation under a wide range of ambient field temperatures (~ ?5 to 40°C). Sensors internal to the chamber monitor temperature, relative humidity, irradiance and pressure. In this implementation the ISCC is coupled to a portable gas chromatograph (Agilent GC‐3000) to sample the chamber atmosphere. Indicative data for Kalahari Sand soils of Botswana are presented as an illustration of the general performance characteristics.     

Getting the best of both worlds? Britain,the EU and migration policy

In perhaps unexpected ways Britain has become quite closely linked to key aspects of EU migration and asylum policy. This could be a rather surprising outcome given that the UK is outside Schengen, opted out of the free movement, asylum and migration provisions of the Amsterdam Treaty and remains fixed on the maintenance of border controls at ports of entry to the UK. However, the differential and conditional engagement that has developed with EU migration and asylum policy has been described by Tony Blair as ‘getting the best of both worlds’. What could it mean to get the best of both worlds? Can the ‘two worlds’ of Britain and Europe be so neatly distinguished? To answer these questions the article surveys the extent of British engagement with EU migration and asylum policy and explains when, how and why the UK has opted into key aspects of it, particularly the more coercive components concerned with asylum and border controls.     

Planning post‐conflict reconstruction in Iraq: what can we learn?

Efforts to improve national and international capabilities to plan and manage post-conflict reconstruction operations are underway in many countries and are high on the agenda of several multilateral institutions. The international community has learned lessons from the numerous post-conflict reconstruction and nation-building operations that it has engaged in since the end of the Cold War but Iraq represented the most difficult and ambitious operation undertaken to date. Although the coalition effort in Iraq had many unique features, we can nonetheless draw lessons from the tenure of the Coalition Provisional Authority (CPA) both for the ongoing effort in Iraq and more broadly for future post-conflict reconstruction operations.
This article discusses the challenges of post-conflict reconstruction planning and mission management and assesses what happened under the CPA. It draws lessons for the future international effort in Iraq and for the international community as it considers how to plan and organize future such missions.     

Courtroom to Classroom: Justice Harlan's Lectures at George Washington University Law School

John Marshall Harlan had a singularly successful legal career as an Associate Justice of the Supreme Court that spanned thirty-three years, from 1877 to 1911, one of the longest terms in history. For twenty-one of those years on the Court he also distinguished himself as a professor of constitutional law at George Washington University. Along with his colleague on the Bench and on the faculty, Associate Justice David J. Brewer, Harlan carried a full course load, teaching just about every subject: evidence, torts, property law, corporation law, commercial law, international law, and his specialty, constitutional law.     

THE DEVELOPMENT of NEOLITHIC and COPPER AGE SETTLEMENT IN the GREAT HUNGARIAN PLAIN PART I: the REGIONAL SETTING

Summary: This paper describes the development of settlement over the period 6000-4000 BC in part of central Europe. It contrasts the patterns of initial agrarian occupation with the subsequent expansion of population in the eastern part of the Carpathian Basin. This area is of particular interest, both as a major focus of prehistoric settlement, and because it is possible to compare the results of recent local surveys with a well documented series of regional distributions.