What explains variation in the costs of treating patients in English obstetrics specialties?

We assess patients admitted to English obstetrics departments to identify what proportion of variation in their costs is explained by patient characteristics and what proportion is due to departmental characteristics. Hospital Episode Statistics records for every patient admitted to obstetrics departments are matched to Reference Cost data by HRG reported by all English hospitals for the year 2005/6. Our sample consists of 951,277 patients in 136 departments. We estimate fixed effects models analysing patient-level costs, explore departmental characteristics that drive variation in costs at department-level and explore the sensitivity of results to the use of the full sample and sub-samples of obstetrics patients. Patient costs depend on various diagnostic characteristics over and above the HRG classification, particularly whether the patient suffered infection. After controlling for patient characteristics a substantial amount of unexplained variation in costs remains at departmental level. Higher costs are evident in departments that are not supported by a neonatology specialty and where factor prices are higher. There is evidence of lower costs in departments with high volumes of activity. We identify departments where further scrutiny of their high costs is required.

Diplomatic Realisation of the EU's "Geoeconomic Pivot": Sanctions, Trade, and Development Policy Reform

At a time when policymakers of the European Union (EU) are pivoting towards a more assertive use of economic power in external relations, this article discusses the merits of situating the much-debated use of economic sanctions and other economic power-based instruments in the broader terminology of EU diplomatic capabilities. Pointing out a number of shortcomings in traditional literature on geoeconomics and economic statecraft, the article applies the concept of “geoeconomic diplomacy” to demonstrate how the EU’s geoeconomic success will heavily depend on the abilities of diplomats and civil servants from institutions and member states to engage in viable relationships with relevant public and private actors in the state-market realm. Based hereon, it identifies institutional and context-specific challenges that could affect the comprehensive realisation of recent EU policy reforms relevant to the geoeconomic agenda: (a) institutional measures to ensure a more robust enforcement of sanctions, (b) a new anti-coercion instrument to counter coercive trade practices by third countries, and (c) a more efficient, focused, and strategic utilisation of EU development funds for purposes of stability and peace. The article concludes by discussing the prospects for bringing such instruments closer together at the level of practical implementation through the establishment of stronger relationships between practitioners working across the EU’s various geoeconomic intervention areas

Multi-object spectroscopy of low-redshift EIS clusters IV. Reliability of matched-filter results at z~0.3-0.4

abridged) In this paper we present new redshifts for 747 galaxies in 23 ESO Imaging Survey (EIS) cluster fields. We use the "gap"-technique to search for significant overdensities in redshift space for identifying groups/clusters of galaxies. In this way we spectroscopically confirm systems in 10 of the 23 cluster candidate fields with a matched-filter estimated redshift z_MF=0.3-0.4 and with spectroscopic redshifts in the range from z=0.158 to z=0.534. We find that the systems identified in the present paper span a broad range of one-dimensional velocity dispersion (175-497 km/s) and richness (12L*<=L<=65L*). Both undersampling and contamination by substructures contribute to the uncertainty of these measurements. From the analysis of the colours of the galaxy populations we find that ~60% of the spectroscopically confirmed systems have a "significant" red sequence with a colour matching passive stellar evolution models. With this paper we complete our spectroscopic survey of the fields of 58 EIS cluster candidates with estimated redshifts z<=0.4. We have measured a total of 1954 galaxy redshifts in the range z=0.0065 to z=0.6706. Of the 58 systems we confirm 42 (~75%) with redshifts between z=0.095 and z=0.534.Comment: Accepted for publication in A&A, 19 pages, 11 figure

Germany's Economic Myths Debunked: Rethinking State-Business Ties for Economic Security

German economic policy has been in flux since the supply chain shocks of the pandemic and the Russian invasion of Ukraine. Partners in Europe are keen for reassurance that they can rely on Germany in a geopolitical crisis, even when its commercial interests are at stake. Germany is aware of this but has been guarded about its intentions and has merely signalled what it thinks partners want to hear. This runs counter to Germany’s reputation as a supporter of constructive business ties, an open and secure EU, global multilateral bodies, and its steadiness and reliability as a partner

Design and Modeling of a New Biomimetic Soft Robotic Jellyfish Using IPMC-Based Electroactive Polymers

Smart materials and soft robotics have been seen to be particularly well-suited for developing biomimetic devices and are active fields of research. In this study, the design and modeling of a new biomimetic soft robot is described. Initial work was made in the modeling of a biomimetic robot based on the locomotion and kinematics of jellyfish. Modifications were made to the governing equations for jellyfish locomotion that accounted for geometric differences between biology and the robotic design. In particular, the capability of the model to account for the mass and geometry of the robot design has been added for better flexibility in the model setup. A simple geometrically defined model is developed and used to show the feasibility of a proposed biomimetic robot under a prescribed geometric deformation to the robot structure. A more robust mechanics model is then developed which uses linear beam theory is coupled to an equivalent circuit model to simulate actuation of the robot with ionic polymer-metal composite (IPMC) actuators. The mechanics model of the soft robot is compared to that of the geometric model as well as biological jellyfish swimming to highlight its improved efficiency. The design models are characterized against a biological jellyfish model in terms of propulsive efficiency. Using the mechanics model, the locomotive energetics as modeled in literature on biological jellyfish are explored. Locomotive efficiency and cost as a function of swimming cycles are examined for various swimming modes developed, followed by an analysis of the initial transient and steady-state swimming velocities. Applications for fluid pumping or thrust vectoring utilizing the same basic robot design are also proposed. The new design shows a clear advantage over its purely biological counterpart for a soft-robot, with the newly proposed biomimetic swimming mode offering enhanced swimming efficiency and steady-state velocities for a given size and volume exchange

Effects of ground movements on realistic guide models for the European Spallation Source

We model the effect of ground movement, based on empirical experience, on the transport properties of long neutron guides by ray-tracing simulations. Our results reproduce the large losses found by an earlier study for a simple model, while for a more realistic engineering model of guide mounting, we find the losses to be significantly smaller than earlier predicted. A detailed study of the guide for the cold neutron spectrometer BIFROST at the European Spallation Source shows that the loss is 7.0(5) % for wavelengths of 2.3-4.0 {\AA}; the typical operational wavelength range of the instrument. This amount of loss does not call for mitigation by overillumination as suggested in the previous work. Our work serves to quantify the robustness of the transport properties of long neutron guides, in construction or planning at neutron facilities worldwide.Comment: 8 pages, 12 figure

On the Efficiency of Fast RSA Variants in Modern Mobile Phones

Modern mobile phones are increasingly being used for more services that require modern security mechanisms such as the public key cryptosystem RSA. It is, however, well known that public key cryptography demands considerable computing resources and that RSA encryption is much faster than RSA decryption. It is consequently an interesting question if RSA as a whole can be executed efficiently on modern mobile phones. In this paper, we explore the efficiency on modern mobile phones of variants of the RSA cryptosystem, covering CRT, MultiPrime RSA, MultiPower RSA, Rebalanced RSA and R Prime RSA by comparing the encryption and decryption time using a simple Java implementation and a typical RSA setup.Comment: 5 pages IEEE format, International Journal of Computer Science and Information Security, IJCSIS December 2009, ISSN 1947 5500, http://sites.google.com/site/ijcsis

Strict and Uniform: Improving EU Sanctions Enforcement

For as long as the EU has been using sanctions as a foreign policy instrument, countering violations has been a challenge. With the EU rapidly expanding the breadth and depth of its sanctions, its ­institutions and member states must find ways to ensure stricter and more uniform enforcement to deter violations, enhance efficiency, and ensure a more level playing field for economic actors. The stakes are high: the success of the EU's response to Russia’s military aggression hinges largely on effective sanctions, and the long-term legitimacy of the tool itself depends on its enforcement