Effects of immersed moonlets in the ring arc particles of Saturn

Ring arcs are the result of particles in corotation resonances with nearby satellites. Arcs are present in Saturn and Neptune systems, in Saturn they are also associated with small satellites immersed on them. The satellite Aegaeon is immersed in the G~ring arc, and the satellites Anthe and Methone are embedded in arcs named after them. Since most of the population of the arcs is formed by $\mu$m-sized particles the dissipative effects, such as the plasma drag and the solar radiation force, decrease the lifetime of the arcs. We analysed the effects of the immersed satellites on these arcs by computing the mass production rate and the perturbation caused by them in the arc particles. By comparing the lifetime of the particles and the mass production rate we concluded that Aegaeon, Anthe and Methone did not act as sources for their arcs. We took a step further by analysing a hypothetical scenario formed by an immersed moonlet of different sizes. As a result we found that regardless the size of the hypothetical moonlet (from about 0.10 km to 4.0 km) these moonlets will not act as a source. These arcs are temporary structures and they will disappear in a very short period of time

Physics and Performance Evaluation Group

We summarize the objectives and results of the ``international scoping study of a future neutrino factory and superbeam facility'' (ISS) physics working group. Furthermore, we discuss how the ISS study should develop into a neutrino factory design study (IDS-NF) from the point of view of physics and performance evaluation.Comment: 3 pages, 1 figure. Plenary talk given at the NuFact 07 conferenc

Futter- und Körnerleguminosen im Biologischen Landbau

Ein Praxisbuch für alle, die im Biologischen Landbau tätig sind! + Alle Anbauverfahren der wichtigsten Futter- und Körnerleguminosen im Haupt- und Zwischenfruchtanbau + Wissen aus Praxis und Forschung in übersichtlicher Form mittels Tabellen, Graphiken und Bildern Das breite Standortspektrum, welches für die einzelnen Kulturen angesprochen wird, sowie unterschiedliche betriebliche Situationen erlauben eine auf den jeweils eigenen Betrieb angepasste Strategie für den Anbau. Jede Pflanze mit systematischer Übersicht über: Systematik, Herkunft und Bedeutung, Sorten, Erträge, Inhaltsstoffe, Boden, Klima, Vegetationsperiode, Anbausysteme, Bodenbearbeitung und Saatbettbereitung, Saattechnik, Nährstoffhaushalt, Beikrautaufkommen und Beikrautregulierung, Krankheiten und Schädlinge sowie deren Regulierung, Ernte und Lagerung sowie Verwendung

The particle detector in your pocket: The Distributed Electronic Cosmic-ray Observatory

The total area of silicon in cell phone camera sensors worldwide surpasses that in any experiment to date. Based on semiconductor technology similar to that found in modern astronomical telescopes and particle detectors, these sensors can detect ionizing radiation in addition to photons. The Distributed Electronic Cosmic-ray Observatory (DECO) uses the global network of active cell phones in order to detect cosmic rays and other energetic particles such as those produced by radioactive decays. DECO consists of an Android application, database, and public data browser available to citizen scientists around the world (https://wipac.wisc.edu/deco). Candidate cosmic-ray events have been detected on all seven continents and can be categorized by the morphology of their corresponding images. We present the DECO project, a novel particle detector with wide applications in public outreach and education.Comment: Presented at ICRC 2017, Busan, Korea. See https://wipac.wisc.edu/deco for more informatio

Inventory of Viticultural Yield and Quality Parameters in Respect of Soil Management

Abstract.  The purpose of this research was to analyse the yeld and quality of eight grapevine varieties (two Romanian autochthonous varieties: ‘Fetească regală’, ‘Traminer roz’, and six world-wide varieties: ‘Rhin Riesling’, ‘Sauvignon Blanc’, ‘Muscat Ottonel’, ‘Pinot gris’, ‘Chardonnay’and ‘Italian Riesling’ cultivated in two different types of soil management (low and high intensity)

Mapping and maneuvering long-term natural orbits around Titania, a satellite of Uranus

In this work, we present the results of a set of numerical simulations carried out to obtain long-duration orbits for a probe around Titania, Uranus' largest satellite. We also propose orbital maneuvers to extend the lifetime of some orbits. Titania's $J_2$ and $C_{22}$ gravitational coefficients and Uranus' gravitational perturbation are considered. The analysis of lifetime sensitivity due to possible errors in $J_2$ and $C_{22}$ values is investigated using multiple regression models. Simulations were performed for eccentricity equal 10-4, and lifetime maps were constructed. The results show that low-altitude orbits have longer lifetimes due to the balance between the disturbance of Uranus and the gravitational coefficients of Titania. The results also show that non-zero values of periapsis longitude ($\omega$) and ascending node longitude ($\Omega$) are essential to increase lifespan. Furthermore, the results indicate that the most economical maneuver occurs for final orbits of radius equal to 1050 km, this is observed for all inclination values.Comment: 5 pages, 3 figures, 1 table. arXiv admin note: substantial text overlap with arXiv:2203.1444