Latest Analysis Results from the KASCADE-Grande Data

KASCADE-Grande, the extension of the multi-detector setup of KASCADE, was devoted to measure the properties of extensive air showers initiated by high-energy cosmic rays in the primary energy range of 1~PeV up to 1~EeV. The observations of the energy spectrum and mass composition of cosmic rays contribute with great detail to the understanding of the transition from galactic to extragalactic origin of cosmic rays, and furthermore to validate the properties of hadronic interaction models in the air shower development. Although the experiment is fully dismantled, the analysis of the entire KASCADE-Grande data set continues. We have recently investigated the impact of different post-LHC hadronic interaction models, QGSJETII-04, EPOS-LHC, Sibyll 2.3d, on air shower predictions in terms of the reconstructed spectra of heavy and light primary masses, including systematic uncertainties. In addition, the conversely discussed evolution of the muon content of high-energy air showers in the atmosphere is compared with the predictions of different interaction models. In this contribution, the latest results from the KASCADE-Grande measurements will be discussed

The cosmic-ray spectrum in the PeV to EeV energy range

Cosmic rays around the so-called knee in the spectrum at around PeV primary energy are generally galactic in origin. Observations on the form of their energy spectrum and their mass composition are fundamental tools to understand the origin, acceleration and propagation mechanism of high-energy cosmic rays. In addition, it is required to find signatures to clarify the transition from galactic to extragalactic sources, which are believed to be responsible for the highest-energy cosmic rays above EeV. This brief review focuses on recent experimental results around the knee of the all-particle energy spectrum and composition in the energy range of the knee up to EeV energies

The KASCADE Cosmic-ray Data Centre KCDC: Releases and Future Perspectives

KCDC, the ’KASCADE Cosmic-ray Data Centre’, is a web-based interface where data from the astroparticle physics experimentKASCADE-Grande is made available for the scientific community as wellas for the interested public. Over the past 5 years, we have continuouslyextended the KASCADE DataShop with various releases and increasedboth the number of detector components from the KASCADE-Grandeexperiment and the data sets. With the latest release we added a new andindependent DataShop for a specific KASCADE-Grande event selectionand by that created the technology for integrating further DataShopsand data of other experiments in KCDC. We present a ‘brief history ofdata - from KASCADE to KCDC’ and will discuss future plans partlyrelated to GRADLCI, the German-Russian Astroparticle Data Life CycleInitiative

An Analysis Framework for KCDC

We will introduce a data analysis extension for the KAS-CADE Cosmic-ray Data Center (KCDC), based on the Jupyterhub/notebookecosystem. A user-friendly interface, easy access to data from KCDC, andmodern analysis software are of special interest. This contribution willdiscuss the service architecture, followed by a brief usage exampl

Data Aggregation Platform for Experiments of Astroparticle Physics

The big data revolution has overturned well-established ap-proaches to data analysis and intensified the demand for access to het-erogeneous data. Modern developed methods allow for the extraction ofnew knowledge from the data, which enables researchers to approachmany previously unsolved mysteries. This trend, observed in many areasof human activity, is also tangible in the field of astroparticle physics.Combined analysis of various experimental data allows researchers toderive deeper insights into the processes occurring in the universe andextend the borders of our knowledge about nature.Providing the infrastructure for such investigations is a topical issue ofthe astroparticle physics community.In this report we examine a service for the aggregated retrieval of hetero-geneous data from distributed storages of numerous astroparticle physicsexperiments. We describe its architecture, available data, principles offunctioning and interaction with users and data center

Facile preparation of water soluble curcuminoids extracted from turmeric (Curcuma longa L.) powder by using steviol glucosides

AbstractCurcuminoids from rhizomes of Curcuma longa possess various biological activities. However, low aqueous solubility and consequent poor bioavailability of curcuminoids are major limitations to their use. In this study, curcuminoids extracted from turmeric powder using stevioside (Ste), rebaudioside A (RebA), or steviol glucosides (SG) were solubilized in water. The optimum extraction condition by Ste, RebA, or SG resulted in 11.3, 9.7, or 6.7mg/ml water soluble curcuminoids. Curcuminoids solubilized in water showed 80% stability at pH from 6.0 to 10.0 after 1week of storage at 25°C. The particle sizes of curcuminoids prepared with Ste, RebA, and SG were 110.8, 95.7, and 32.7nm, respectively. The water soluble turmeric extracts prepared with Ste, RebA, and SG showed the 2,2-diphenyl-1-picrylhydrazyl radical scavenging (SC50) activities of 127.6, 105.4, and 109.8μg/ml, and the inhibition activities (IC50) against NS2B-NS3pro from dengue virus type IV of 14.1, 24.0 and 15.3μg/ml, respectively