Gardner's deformations of the N=2 supersymmetric a=4-KdV equation

We prove that P.Mathieu's Open problem on constructing Gardner's deformation for the N=2 supersymmetric a=4-Korteweg-de Vries equation has no supersymmetry invariant solutions, whenever it is assumed that they retract to Gardner's deformation of the scalar KdV equation under the component reduction. At the same time, we propose a two-step scheme for the recursive production of the integrals of motion for the N=2, a=4-SKdV. First, we find a new Gardner's deformation of the Kaup-Boussinesq equation, which is contained in the bosonic limit of the super-hierarchy. This yields the recurrence relation between the Hamiltonians of the limit, whence we determine the bosonic super-Hamiltonians of the full N=2, a=4-SKdV hierarchy. Our method is applicable towards the solution of Gardner's deformation problems for other supersymmetric KdV-type systems.Comment: Extended version of the talks given by A.V.K. at 8th International conference `Symmetry in Nonlinear Mathematical Physics' (June 20-27, 2009, Kiev, Ukraine) and 9th International workshop `Supersymmetry and Quantum Symmetries' (July 29 - August 3, 2009, JINR, Dubna, Russia); 22 page

The Control System for a new Pixel Detector at the sLHC

For the upgrade of the LHC, the sLHC (super Large Hadron Collider), a new ATLAS Pixel Detector is planned, which will require a completely new control system. To reduce the material budget new power distribution schemes are under investigation, where the active power conversion is located inside the detector volume. Such a new power supply system will need new control strategies. Parts of the control must be located closer to the loads. The minimization of mass, the demand for less cables and the re-use of the outer existing services are the main restrictions to the design of the control system. The requirements of the DCS (Detector Control System) and a first concept will be presented. We will focus on a control chip which necessarily has to be implemented in the new system. A setup of discrete components has been built up to investigate and verify the chip’s requirements. We report on the status of the work

Variational Lie algebroids and homological evolutionary vector fields

We define Lie algebroids over infinite jet spaces and establish their equivalent representation through homological evolutionary vector fields.Comment: Int. Workshop "Nonlinear Physics: Theory and Experiment VI" (Gallipoli, Italy; June-July 2010). Published v3 = v2 minus typos, to appear in: Theoret. and Mathem. Phys. (2011) Vol.167:3 (168:1), 18 page

A new life for sterile neutrino dark matter after the pandemic

We propose a novel mechanism to generate sterile neutrinos $\nu_s$ in theearly Universe, by converting ordinary neutrinos $\nu_\alpha$ in scatteringprocesses $\nu_s\nu_\alpha\to\nu_s\nu_s$. After initial production byoscillations, this leads to an exponential growth in the $\nu_s$ abundance. Weshow that such a production regime naturally occurs for self-interacting$\nu_s$, and that this opens up significant new parameter space where $\nu_s$make up all of the observed dark matter. Our results provide strong motivationto further push the sensitivity of X-ray line searches, and to improve onconstraints from structure formation.<br

A new life for sterile neutrino dark matter after the pandemic

We propose a novel mechanism to generate sterile neutrinos $\nu_s$ in theearly Universe, by converting ordinary neutrinos $\nu_\alpha$ in scatteringprocesses $\nu_s\nu_\alpha\to\nu_s\nu_s$. After initial production byoscillations, this leads to an exponential growth in the $\nu_s$ abundance. Weshow that such a production regime naturally occurs for self-interacting$\nu_s$, and that this opens up significant new parameter space where $\nu_s$make up all of the observed dark matter. Our results provide strong motivationto further push the sensitivity of X-ray line searches, and to improve onconstraints from structure formation.<br

A new life for sterile neutrino dark matter after the pandemic

We propose a novel mechanism to generate sterile neutrinos $\nu_s$ in the early Universe, by converting ordinary neutrinos $\nu_\alpha$ in scattering processes $\nu_s\nu_\alpha\to\nu_s\nu_s$. After initial production by oscillations, this leads to an exponential growth in the $\nu_s$ abundance. We show that such a production regime naturally occurs for self-interacting $\nu_s$, and that this opens up significant new parameter space where $\nu_s$ make up all of the observed dark matter. Our results provide strong motivation to further push the sensitivity of X-ray line searches, and to improve on constraints from structure formation

System Tests of the ATLAS Pixel Detector

The innermost part of the ATLAS (A Toroidal LHC ApparatuS) experiment at the LHC (Large Hadron Collider) will be a pixel detector, which is presently under construction. Once installed into the experimental area, access will be extremely limited. To ensure that the integrated detector assembly operates as expected, a fraction of the detector which includes the power supplies and monitoring system, the optical readout, and the pixel modules themselves, has been assembled and operated in a laboratory setting for what we refer to as system tests. Results from these tests are presented.Comment: 5 Pages, 9 Figures, to appear in Proceedings of the Eleventh Workshop on Electronics for LHC and Future Experiment

Variability in basal metabolic rate of a long-distance migrant shorebird (Red Knot, <i>Calidris canutus</i>) reflects shifts in organ sizes

We studied differences in body composition and basal metabolic rate (BMR, measured in postabsorptive birds under thermoneutral conditions at night) in two subspecies of red knots, Calidris canutus: one that spends the nonbreeding season under energetically costly climatic conditions at temperate latitudes (subspecies islandica in western Europe) and one that winters in the hot and humid tropics (subspecies canutus in West and South Africa). To examine whether the possible differences would be upheld under identical conditions, we kept both groups in captivity as well. Body composition was quantified with respect to the fat and lean components of 10 ''organs'' (breast muscles, leg muscles, stomach, intestine, liver kidneys, lungs, heart, and the skin, and skeleton and attached muscle). Captive birds had lighter lean tissues than wild birds, especially those of the stomach, intestine, kidneys, and liver (the nutritional organs). During the northern winter wild islandica knots had higher lean masses than canutus knots in tropical Africa. Tropically wintering red knots had lower BMRs than their temperate-wintering conspecifics, and birds in long-term captivity had lower BMR values than their free-living counterparts. Average BMR values per category of birds (wild or captive of either subspecies) were strongly correlated with the group averages of lean mass. Prediction of BMR on the basis of total lean mass of red knots undergoing incipient starvation follows this same relationship because metabolically active tissue is being depleted. That the two subspecies converged to similar body composition in captivity indicates that individual red knots may possess considerable flexibility. We argue that red knots, and probably most other long-distance migrants, have metabolic machinery that is able to adjust continuously, depending on the ecological conditions and food types encountered in the course of the year. We further argue that variation in (functional components of) lean mass is the vehicle for seasonal adjustments in metabolic physiology to variable demand levels. Body mass adjustments offer a flexible response enabling red knots to economize on total daily metabolic expenditure whenever conditions allow a relaxation of metabolic scope, such as during winter in the Tropics.</p

EMPOWERing older people and their communities to manage their own CARE (EMPOWERCARE): Evaluation study of a social innovation initiative across four European countries

This paper outlines the evaluation strategy of the EMPOWERCARE, an EU Interreg 2 Seas funded social innovation project, which involves a partnership of local authorities, universities and non-governmental organisations from four European countries: Belgium, France, the Netherlands and the United Kingdom. Partners are working in collaboration with local people aged 65+, and those aged 50+ with at least one chronic condition, to respond to current gaps in the care of older people. The project aims specifically to contribute to person-centred care and technology knowledge transfer whilst reducing isolation, loneliness and increasing solidarity amongst older people and their communities. During the project, partners are jointly developing a strategy for implementing good-practice models, a workforce transformation approach via shared training and a technology blueprint with emphasis on caring digital technologies to address the rising demand for health and social care services for older people. The project addresses this challenge by drawing on community assets, involving older people in decisions about their own health and wellbeing, enabling them to keep healthier and in their own homes and communities safely for longer. The project’s evaluation aims to measure the impact of the EMPOWERCARE initiative across 7 pilot sites in the 4 participating countries. Given the Covid-19 pandemic, the evaluation design has been developed with a view to being agile and able to respond to complex and shifting situations, and especially so in terms of what and how data are collected. A realist synthesis approach (Pawson & Tilley, 2004) guides the evaluation within a descriptive case study design (Yin 2003) to identify and contextualise the project strategies that are influential within and across the 7 different case study sites. The evaluation uses multiple interdisciplinary methods, such as surveys, Photovoice and Social Return on Investment, to capture a range of perspectives across three timepoints, baseline (T0), mid-point (T1) and end-point (T2). Online surveys are conducted with both end-users and the workforce in all pilot sites at T0 and T2. At T1, end-users are actively involved in creating visual data through Photovoice to capture their lived experiences with local initiatives in pilot sites. Visual data are going to be displayed at pilot site exhibitions targeted to key local stakeholders and members of the workforce. Focus groups will be conducted with all participants reflecting on the visual data exhibition to explore insights about the initiative from current and future perspectives. This aspect is informed by a Social Return on Investment approach. The sequential data collection of multiple sources and longitudinal study design identify patterns of change and impact. The evaluation design will deliver a theory-driven rich explanation of what works about EMPOWERCARE and for whom, why, how and in what circumstances it works. The analysis of the evaluation findings will contribute to a more empowered person-centred approach, with more inclusive and caring digital health solutions that will allow policy makers to develop localised, efficient and social-value driven services to meet the rising needs of older people in the European regions