Investigation of the mechanical behavior of electrodes after calendering and its influence on singulation and cell performance

Battery cell production is a complex process chain with interlinked manufacturing processes. Calendering in particular has an enormous influence on the subsequent manufacturing steps and final cell performance. However, the effects on the mechanical properties of the electrode, in particular, have been insufficiently investigated. For this reason, the impact of different densification rates during calendering on the electrochemical cell performance of NMC811 (LiNi$_{0.8}$Mn$_{0.1}$Co$_{0.1}$O$_{2}$) half-cells are investigated to identify the relevant calendering parameters. Based on this investigation, an experimental design has been derived. Electrode elongations after calendering in and orthogonal to the running direction of the NMC811 cathode are investigated in comparison with a hard carbon anode after calendering. Elongations orthogonal to the machine direction are observed to have no major dependencies on the compaction rate during calendering. In the machine direction, however, significant elongation occurs as a dependency of the compaction rate for both the hard carbon anode and the NMC811. In addition, the geometric shape of the NMC811 electrodes after separation into individual sheets is investigated with regard to different compaction rates during calendering. It is shown that the corrugations that occur during calendering are propagated into the single electrode, depending on the compaction rate

Can integrated agriculture - nutrition programs change gender norms on land and asset ownership? Evidence from Burkina Faso.

There is a high degree of interest in the potential for agricultural programs to be designed and implemented to achieve health and nutrition objectives. Policymakers have often looked to the experience of civil society organizations in designing and implementing such programs, particularly in different social and cultural contexts. For the past 20 years, Helen Keller International (HKI) has implemented homestead food production programs in Asia and recently has started to adapt and implement these programs in Africa south of the Sahara. The goal of these programs is to improve the nutritional status of and young children through a number of production and nutrition interventions. These interventions are targeted to mothers under the presumption that increasing women’s access to and control over productive assets and enhancing women’s human capital to improve production and health and nutrition care practices will translate into improved nutritional status for their children. However, there is very little evidence documenting the ways in which HKI’s homestead food production programs influence women’s access to and control over productive assets and enhance women’s human capital in ways that may improve nutritional outcomes. This paper uses a mixed-methods approach to analyze the impact of HKI’s Enhanced-Homestead Food Production pilot program in Burkina Faso on women’s and men’s assets and on norms regarding ownership, use, and control of those assets. Even though men continue to own and control most land and specific assets in the study area, women’s control over and ownership of assets has started to change, both in terms of quantifiable changes as well as changes in people’s perceptions and opinions about who can own and control certain assets. The paper also discusses the implications of such changes for program sustainability

An integrated agriculture - nutrition program in Burkina Faso can change gender norms on land and asset ownership.

Helen Keller International (HKI) carried out a two-year Enhanced-Homestead Food Production (E-HFP) pilot program (2010–2012) in Gourma Province in eastern Burkina Faso. The program’s goal was to improve women’s and children’s nutrition and health outcomes through production and nutrition interventions. One way in which the program sought to improve its production and nutrition out-comes was by directly increasing women’s access to and control over productive assets. To accomplish this objective, HKI trained women and gave them inputs for raising small animals and growing nutrient-rich foods, as well as health-and nutrition -related education delivered through a behavior change communication (BCC) strategy (Dillon et al. 2012). HKI partnered with the Gender, Agriculture, and Assets Project (GAAP) to measure the impact of the program’s interventions on men’s and women’s accumulation, ownership, and control over productive assets, and to assess changes in norms and perceptions regarding the ownership, use, and control over these assets

Measurement of the Luminosity in the ZEUS Experiment at HERA II

The luminosity in the ZEUS detector was measured using photons from electron bremsstrahlung. In 2001 the HERA collider was upgraded for operation at higher luminosity. At the same time the luminosity-measuring system of the ZEUS experiment was modified to tackle the expected higher photon rate and synchrotron radiation. The existing lead-scintillator calorimeter was equipped with radiation hard scintillator tiles and shielded against synchrotron radiation. In addition, a magnetic spectrometer was installed to measure the luminosity independently using photons converted in the beam-pipe exit window. The redundancy provided a reliable and robust luminosity determination with a systematic uncertainty of 1.7%. The experimental setup, the techniques used for luminosity determination and the estimate of the systematic uncertainty are reported.Comment: 25 pages, 11 figure

Physiological integration of coral colonies is correlated with bleaching resistance

Inter-module physiological integration of colonial organisms can facilitate colony-wide coordinated responses to stimuli that strengthen colony fitness and stress resistance. In scleractinian corals, whose colonial integration ranges from isolated polyps to a seamless continuum of polyp structures and functions, this coordination improves responses to injury, predation, disease, and stress and may be one of the indications of an evolutionary origin of Symbiodinium symbiosis. However, observations of species-specific coral bleaching patterns suggest that highly integrated coral colonies may be more susceptible to thermal stress, and support the hypothesis that communication pathways between highly integrated polyps facilitate the dissemination of toxic byproducts created during the bleaching response. Here we reassess this hypothesis by parameterizing an integration index using 7 skeletal features that have been historically employed to infer physiological integration. We examine the relationship between this index and bleaching response across a phylogeny of 88 diverse coral species. Correcting for phylogenetic relationships among species in the analyses reveals significant patterns among species characters that could otherwise be obscured in simple cross-species comparisons using standard statistics, whose assumptions of independence are violated by the shared evolutionary history among species. Similar to the observed benefits of in creased coloniality for other types of stressors, the results indicate a significantly reduced bleaching response among coral species with highly integrated colonies

Triggering events with GPUs at ATLAS

The growing complexity of events produced in LHC collisions demands increasing computing power both for the online selection and for the offline reconstruction of events. In recent years there have been significant advances in the performance of Graphics Processing Units (GPUs) both in terms of increased compute power and reduced power consumption that make GPUs extremely attractive for use in a complex particle physics experiments such as ATLAS. A small scale prototype of the full ATLAS High Level Trigger has been implemented that exploits reconstruction algorithms optimized for this new massively parallel paradigm. We discuss the integration procedure followed for this prototype and present the performance achieved and the prospects for the future.Peer Reviewe