The Spin Foam Approach to Quantum Gravity

This article reviews the present status of the spin foam approach to the quantization of gravity. Special attention is payed to the pedagogical presentation of the recently introduced new models for four dimensional quantum gravity. The models are motivated by a suitable implementation of the path integral quantization of the Plebanski formulation of gravity on a simplicial regularization. The article also includes a self-contained treatment of the 2+1 gravity. The simple nature of the latter provides the basis and a perspective for the analysis of both conceptual and technical issues that remain open in four dimensions.Comment: To appear in Living Reviews in Relativit

A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)

Meeting abstrac

Global patient outcomes after elective surgery: prospective cohort study in 27 low-, middle- and high-income countries.

BACKGROUND: As global initiatives increase patient access to surgical treatments, there remains a need to understand the adverse effects of surgery and define appropriate levels of perioperative care. METHODS: We designed a prospective international 7-day cohort study of outcomes following elective adult inpatient surgery in 27 countries. The primary outcome was in-hospital complications. Secondary outcomes were death following a complication (failure to rescue) and death in hospital. Process measures were admission to critical care immediately after surgery or to treat a complication and duration of hospital stay. A single definition of critical care was used for all countries. RESULTS: A total of 474 hospitals in 19 high-, 7 middle- and 1 low-income country were included in the primary analysis. Data included 44 814 patients with a median hospital stay of 4 (range 2-7) days. A total of 7508 patients (16.8%) developed one or more postoperative complication and 207 died (0.5%). The overall mortality among patients who developed complications was 2.8%. Mortality following complications ranged from 2.4% for pulmonary embolism to 43.9% for cardiac arrest. A total of 4360 (9.7%) patients were admitted to a critical care unit as routine immediately after surgery, of whom 2198 (50.4%) developed a complication, with 105 (2.4%) deaths. A total of 1233 patients (16.4%) were admitted to a critical care unit to treat complications, with 119 (9.7%) deaths. Despite lower baseline risk, outcomes were similar in low- and middle-income compared with high-income countries. CONCLUSIONS: Poor patient outcomes are common after inpatient surgery. Global initiatives to increase access to surgical treatments should also address the need for safe perioperative care. STUDY REGISTRATION: ISRCTN5181700

Trends and connections across the Antarctic cryosphere

Satellite observations have transformed our understanding of the Antarctic cryosphere. The continent holds the vast majority of Earth’s fresh water, and blankets swathes of the Southern Hemisphere in ice. Reductions in the thickness and extent of floating ice shelves have disturbed inland ice, triggering retreat, acceleration and drawdown of marine-terminating glaciers. The waxing and waning of Antarctic sea ice is one of Earth’s greatest seasonal habitat changes, and although the maximum extent of the sea ice has increased modestly since the 1970s, inter-annual variability is high, and there is evidence of longer-term decline in its extent

Towards “Smart Governance” Through a Multidisciplinary Approach to E-government Integration, Interoperability and Information Sharing: A Case of the LMIP Project in South Africa

Part 1: Smart Governance, Government and CitiesInternational audienceThe integration and interoperability of e-government systems, and information sharing is essential in transforming governments to “smart governments” that deliver services to enhance the socio- economic inclusion and the quality of life of its citizens. The aim of this doctoral study is to understand institutional barriers to e-government integration, interoperability and information sharing preventing governments from transforming to smart governments. The study is an interpretive case study, using South Africa as a unique case of a developing country which has adopted the “smart” agenda. Findings will contribute to theory through advancing knowledge in the new research area of smart government as well as contributing to practice through generating applicable knowledge on digital transformation in the public sector

In search of ICT in smart cities : Policy documents as idea carriers in urban development

This paper explores how policy documents carry and institutionalize smart city ideas from high policy level to concrete policy level in an urban development context. We analyze the national urban development vision for Sweden and documents in a local urban development project in a Swedish city, in order to explore what kind of roles and expectations ICT is given in these documents. We contrast this with views of how social and environmental aspects are discussed in the studied documents. In order to understand and analyze the result we apply the concept of institutional carriers from institutional theory to our findings. Our analysis shows that as carriers of how ICT can contribute to increased sustainabilityin urban development, the policy documents do not function very well. ICT aspects are not put forth by any policy-making actor, neither on national nor on local level. The notion of institutional carriers helped us understand that without a responsible actor focusing on ICT’s role in smart cities, it is easy to forget or lose sight of technologyFunding agencies: Swedish Energy AgencySwedish Energy Agency</p