Cosmic multi-muon bundles measured at DELPHI

The DELPHI detector at LEP, located 100 $m$ underground, has been used to detect the multi-muon bundles by cathode readout of its hadron calorimeter and its tracking detectors (TPC, muon chambers). The experimental apparatus allows us to study muon bundles originating from primary cosmic particles with energies in the interval $10^{14}$ - $10^{17} eV$. The cosmic events registered during the years 1999 and 2000 correspond roughly to $1.6 10^6 s$ of effective run time. The aim of the work is to compare the measured muon multiplicity distributions and predictions of high energy interaction models for different types of primary particles and also to determine the absolute flux of events in certain muon multiplicity range. The presentation describes the current status of the analysis.Comment: 2 pages, 1 figure, presented at XXXVIIth Rencontres de Moriond Electroweak Interactions and Unified Theories 2002 (Young Scientists Forum

Porážka a zpracování masa a masných výrobků v ekologickém zemědělství

Tato příručka poskytuje návody a doporučení, jak jednoduše zorganizovat porážku, vybudovat a uvést do provozu zpracovnu masa i masných výrobků přímo na úrovni zemědělského podniku. Je určena stávajícím i budoucím zpracovatelům, provozujícím porážku a zpracování masa na farmě. Příručka obsahuje přehled potřebných zákonů, předpisů a vyhlášek, obecné požadavky na vybavení provozu pro porážku a zpracování, následně samotné zpracování a výroba faremních produktů, seznam a vzory dokumentů HACCP, potřebné informace pro prodej ze dvora, možnost finanční podpory v oblasti zpracování masa a nakonec užitečné odkazy a publikace. Součástí metodiky je fotopříloha názorných příkladů z provozu porážky a zpracování

All Sky Camera for the CTA Atmospheric Calibration work package

The All Sky Camera (ASC) is a passive non-invasive imaging system for rapid night sky atmosphere monitoring. By design, the operation of the ASC will not affect the measurement procedure of the CTA observatory, for which we discuss its application in this report. The data collected should enable improved productivity and increased measurement time for the CTA observatory. The goal of ASC is to identify cloud position, atmosphere attenuation and time evolution of the sky condition, working within the CTA Central Calibration Facilities (CCF) group. Clouds and atmosphere monitoring may allow near-future prediction of the night-sky quality, helping scheduling. Also, in the case of partly cloudy night sky the cameras will identify the uncovered regions of the sky during the operation time, and define potential observable sources that can be measured. By doing so, a higher productivity of the CTA observatory measurements may be possible

A Study of Modified Characteristics of Hadronic Interactions

We have implemented ad-hoc modifications to the CORSIKA Monte-Carlo generator which allow us to simultaneously adjust the multiplicity, elasticity and cross-section of hadronic interactions with respect to the predictions of the Sibyll 2.3d interaction model, in order to assess whether a reasonable combination of changes (that is not excluded by current experimental data) could alleviate the observed tension between the model predictions and observed features of extensive air showers induced by ultra-high energy cosmic rays (UHECR). Previously, we have studied the effects of such changes on proton-initiated showers. Because a multitude of experimental data suggest that the primary composition of the UHECR is mixed, we have expanded the modification procedure to include nuclear projectiles in a consistent way based on the superposition model, in a similar manner as was used in the previous studies carried out using one-dimensional simulation methods. As we are using a fully three-dimensional approach, we can quantify the effects of the changes on both longitudinal and lateral features of the showers. With the inclusion of nuclear projectiles, we can study the impact of the changes on observable quantities for realistic primary beams as well as on the determination of the primary composition from data under the assumption of the modified hadronic interactions.Comment: 6 pages, 9 figures, a conference proceeding for UHECR202