The RF Cycle of the PIMMS Medical Synchrotron

This paper presents the design of the RF cycle of the medical synchrotron of the PIMMS (Proton-Ion Medical Machine Study) hosted at CERN. The cycle comprises adiabatic trapping, acceleration and RF gymnastics, for either protons or fully stripped carbon ions. The injection energy is 20 MeV for protons and 7 MeV/u for carbon. Maximum extraction energies are 250 MeV for protons and 400 MeV/u for carbon ions. The cycle duration is less than 1 s, with a maximum magnetic field ramp below 3 T/s. The simulations show that the beam stays inside the aperture of the machine, and that, theoretically, there are no longitudinal losses. At the end of the cycle, the beam is ready for extraction with a Dp/p = 0.4 %. The peak RF voltage is 3 kV and the frequency ranges from 0.4 to 3 MHz

The RF Cycle of the PIMMS Synchrotron

This paper deals with the study of the rf cycle of the synchrotron of the Proton-Ion Medical Machine Study (PIMMS) hosted at CERN. The cycle comprises the adiabatic trapping, the acceleration and the rf gymnastics, both for protons and fully stripped carbon ions. The injection energy is 20 MeV for protons and 7 MeV/u for carbon. The maximum extraction energies are 250 MeV for protons and 400 MeV/u for carbon ions. The reserved time is less than 1 s, with a maximum magnetic field ramp of less than 3 T/s. The simulations show that the beam stays inside the aperture of the machine, and that there are no longitudinal losses. At the end of the cycle the beam is ready for extraction with a Dp/p of 0.4 %. The peak rf voltage is 3 kV and the frequency range is from 0.49 to 2.85 MHz

BMBF-Verbund-Projekt: "Interdisziplinarität von Wissenschaftseinrichtungen - Strukturen und Effekte" (INTERDIS), Teilvorhaben "Detailanalysen zur MPG"

1 Einleitung 3 2 Datenquellen und Methoden 4 2.1 Externe Datenquellen 4 2.2 Datenaufbereitung und Auswahl 5 2.3 Fachklassifikationen 7 2.4 Topic-Modelling 8 2.4.1 Latent Dirichlet Allocation 8 2.4.2 Korpora 8 2.4.3 Linguistische Vorverarbeitung der Textdokumente 8 2.4.4 LDA-Modellierung 9 2.5 Indikatoren der Interdisziplinarität 10 2.5.1 Teilmengen (Sets) 10 2.5.2 Einfache Indikatoren 10 2.5.3 Auf Zitationsnetzwerken basierende Indikatoren 10 2.6 Statistik, Visualisierung, Archivierung 11 3 Ergebnisse 12 3.1 Klassische Bibliometrische Indikatoren zur Messung der Interdisziplinarität 12 3.1.1 Überblick Deutschland 12 3.1.2 Teilgruppen der Max Planck Gesellschaft 15 3.2 Neue Methoden zur Messung von Interdisziplinarität 17 3.2.1 Patente 17 3.2.2 Kooperationsprojekte 19 3.2.3 Personal 21 3.2.4 Text-basierte Indikatoren 23 3.3 Synthese der Indikatoren 26 4 Diskussion 28 Literatur und Software 3

Tomographic Measurements of Longitudinal Phase Space Density

Tomography is now a very broad topic with a wealth of algorithms for the reconstruction of both qualitative and quantitative images. One of the simplest algorithms has been modified to take into accou nt the non-linearity of large-amplitude synchrotron motion. This permits the accurate reconstruction of longitudinal phase space density from one-dimensional bunch profile data. The method is a hybrid one which incorporates particle tracking, and considerable effort has been invested to optimize the computer code so that it may also be compiled to exploit parallel architectures efficiently. A selec tion of the results obtained at different CERN accelerators is presented. The starting-point in each case is simply a "mountain range" of digitized bunch profiles

The Media Pedagogy Futurelab: Quality Development – Professionalisation – Standards. Thesis Paper on the 2017 GMK Forum on Communication Culture

Das Forum Kommunikationskultur der Gesellschaft für Medienpädagogik und Kommunikationskultur (GMK) steht im Jahr 2017 unter dem Anspruch, sich mit Fragen der Qualitätsentwicklung medienpädagogischen Handelns in Wissenschaft und Praxis auseinanderzusetzen. Dabei soll besonderes Augenmerk auf Fragen der Professionalisierung und der Entwicklung von Standards gelegt werden. Zu diesen Fragen stellen wir im Folgenden ausgewählte Thesen mit ergänzenden und erweiternden Erläuterungen im Sinne eines programmatischen Textes zur Diskussion. Die mit diesem Papier anzustossende Diskussion soll zunächst einer konstruktiv-weiterführenden internen Klärung wichtiger Fragen medienpädagogischer Praxis und Forschung dienen und dabei auch anzeigen, welche Positionen in der Community konsensfähig sind und welche möglicherweise strittig erscheinen. Zugleich sollen die Thesen und die Diskussion zu einer Positionsbestimmung der GMK bezüglich praktischer und wissenschaftlicher medienpädagogischer Arbeit nach aussen beitragen. Mit der Diskussion ist das Ziel verbunden, künftige Bedarfe für Handlungs- und Forschungsfelder der Medienpädagogik – jedoch ohne Anspruch auf Vollständigkeit – zu identifizieren. Um der Prägnanz und Kürze willen, wird der zu jeder These gehörende Hintergrund nur knapp angedeutet, ohne die damit verbundenen (teils sehr umfassenden) Diskurse im Detail nachzuzeichnen. Angegebene Literaturbezüge sollen jeweils beispielhaft auf differenzierende und tiefergehende Ausführungen verweisen. Die Thesenfolge beginnt mit Überlegungen zum technikinduzierten gesellschaftlichen Wandel („Digitalisierung“) und seiner Bedeutung für die Medienbildung. Dies vorausschickend, gehen wir auf Fragen der Qualifizierung und Professionalisierung für praktisches Handeln sowie auf die Rolle der Medienpädagogik als Wissenschaft und schliessend auf den Stellenwert von Standards zur Orientierung und Reflexion ein.The 2017 Forum on Communication Culture hosted by the Society for Media Pedagogy and Communication Culture (GMK – Gesellschaft für Medienpädagogik und Kommunikations­kultur) is devoted to quality development in media pedagogy in both research and practice. Particular focus is placed on issues of professionalisation and the development of standards. The following document contains selected theses with supplementary and explanatory notes and is intended to serve as a programmatic text for discussion. The discussion ensuing from this paper is intended first and foremost to serve the ongoing internal clarification of important issues related to media pedagogy in research and practice. Consequently, it seeks to identify those positions the community can agree on, and those which might transpire to be more contentious. At the same time, the theses and the accompanying discussion aim to assist the GMK in formally determining where it stands on practical and scholarly work being undertaken in media pedagogy, thereby enabling it to formulate an official position which it can represent externally. Inherent within the discussion is the goal of pinpointing any future requirements in the respective fields of practice and research in media pedagogy – albeit without claiming to be exhaustive in this respect. In the interests of concision and brevity, the accompanying background to each thesis is dealt with only briefly, without detailed scrutiny of its (often very comprehensive) associated discourse. Accompanying literature references are intended to provide examples of more finely grained and in-depth explanations. The theses begin with considerations on technology-driven social change («digitisation») and its significance for media education. Following on from this, we then discuss issues related to qualifications and the professionalisation of media pedagogy in practice; we also examine the role of media pedagogy as a scholarly activity, and conclude with the importance of standards as points of orientation and initiators of debate

What’s in your refrigerator? Children’s views on equality, work, money and access to food

This study investigates young children’s theorising about families and their differential access to food from a perspective of wealth and poverty. Fifty-two children, aged 6–7 years, attending a Western Australian school were invited to share their perspectives on this global issue. The single case study method utilised three children’s focus groups to gather a range of perspectives from the children. Photographs of full and empty refrigerators were used elaborate a story told to the children about two families with significantly different amounts of food in their refrigerator at home. The study demonstrates that researchers and educators may fruitfully consider social sustainability with young children whose insights into these issues provide evidence of their clearly formed perspectives on complex global issues. Conversations about global “wicked problems” enable children to express their point of view on economic and social as well as environmental issues. The findings indicate that the young children in this study hold clear and sophisticated opinions regarding fairness, poverty, the relationship between paid work and money, food security and social justice. They also had an optimistic outlook on how to address inequality. Significant insights into children’s theorising around social sustainability are presented in four themes

Long term global trends in open access. A data paper

Studies on long term trends in open access are of interest for the assessment of the evolution of scientific publishing and related markets. We therefore compiled and analysed a data set that integrated Web of Science as a global bibliographic data source on internationally relevant publications with data from Unpaywall, the primary provider of information related to open access at publication level. Data were captured in 2021 and show the open access categories as defined by Unpaywall for the publication years 2000 to 2020. In these two decades open access has gained substantial momentum. Starting with a few per cent, it now covers roughly half of the publications when embargo periods are over. The comparison of four variants of subsets of these data, however, show the wide variability in absolute and relative numbers. Results depend heavily on the characteristics of the data sources and the subsets selected within these. Major factors are listed and discussed. Aggregated data are provided in the MPG data repository

A Research and Strategy of Remote Sensing Image Denoising Algorithms

Most raw data download from satellites are useless, resulting in transmission waste, one solution is to process data directly on satellites, then only transmit the processed results to the ground. Image processing is the main data processing on satellites, in this paper, we focus on image denoising which is the basic image processing. There are many high-performance denoising approaches at present, however, most of them rely on advanced computing resources or rich images on the ground. Considering the limited computing resources of satellites and the characteristics of remote sensing images, we do some research on these high-performance ground image denoising approaches and compare them in simulation experiments to analyze whether they are suitable for satellites. According to the analysis results, we propose two feasible image denoising strategies for satellites based on satellite TianZhi-1.Comment: 9 pages, 4 figures, ICNC-FSKD 201

Ontogeny of synaptophysin and synaptoporin in the central nervous system

The expression of the synaptic vesicle antigens synaptophysin (SY) and synaptoporin (SO) was studied in the rat striatum, which contains a nearly homogeneous population of GABAergic neurons. In situ hybridization revealed high levels of SY transcripts in the striatal anlage from embryonic day (E) 14 until birth. In contrast. SO hybridization signals were low, and no immunoreactive cell bodies were detected at these stages of development. At E 14, SY-immunoreactivity was restricted to perikarya. In later prenatal stages of development SY-immunoreactivity appeared in puncta (identified as terminals containing immunostained synaptic vesicles), fibers, thick fiber bundles and ‘patches’. In postnatal and adult animals, perikarya of striatal neurons exhibited immunoreaction for SO; ultrastructurally SO antigen was found in the Golgi apparatus and in multivesicular bodies. SO-positive boutons were rare in the striatum. In the neuropil, numerous presynaptic terminals positive for SY were observed. Our data indicate that the expression of synaptic vesicle proteins in GABAergic neurons of the striatum is developmentally regulated. Whereas SY is prevalent during embryonic development, SO is the major synaptic vesicle antigen expressed postnatally by striatal neurons which project to the globus pallidus and the substantia nigra. In contrast synapses of striatal afferents (predominantly from cortex, thalamus and substantia nigra) contain SY