258 research outputs found
SR Workshop 1 - Online workshop on climate data analysis for climate extremes for Senior Researchers
No full textThis workshop was held on April 12, 13, 15, 21. and 22. 2021 at the University of Novi Sad Faculty of Sciences, as the first in a series of EXtremeClimTwin workshops on Climate extremes to foster outcome-oriented, interactive training. The aim of this event is to improve the overall scientific and research capacity of UNSPMF and to encourage and enhance the networking of the UNSPMF research group with other research-intensive institutions to foster future long-term cooperation and sustainability.
The first day was dedicated to “Advanced Introduction to Climate Time Series Analysis and Trend Estimation”. Dr. Manfred Mudelsee introduced the advanced statistical methods of climate time series analysis: Persistence Models, Bootstrap Confidence Intervals, and Regression.
Prof Dr. Robert L. Wilby was the lecturer on the second day of the Workshop. The title of his lecture was “When is a trend not a trend? Homogeneity and stationarity checks”. Prof. Dr. Wilby discussed the key concepts of data homogeneity and introduced state-of-the-art research done at LU as well as case studies related to the subject of data quality checks.
The third day of the Workshop was reserved for an introductory lecture about climate models and climate reanalysis. Dr. Carley Iles talked about the global and regional climate models, their use in the studies of climate extremes and impact studies. The afternoon session of the third day of the Workshop was presented by Dr. Tom Matthews. The title of the practical session was “Programmatic downloading and manipulation of weather station data”.
The fourth day of the Workshop was reserved for a presentation by Dr. Jana Sillmann. The title of the morning session was ”Identification and attribution of climate extremes?; Extreme temperature indices; Extreme precipitation indices”. The afternoon, practical session was hosted by Dr. Marit Sandstad. The title of the presentation was “Downloading and working with netcdf files”
ESRs Workshop 1 - Online workshop on climate data analysis for climate extremes for Early Stage Researchers
No full textThe Online workshop on climate data analysis for climate extremes for Early stage researchers (ESRs) was held on April 12, 13, 15, 21 and 22, 2021. at the University of Novi Sad, Faculty of Science as an activity in the ExtremeClimTwin project.
This workshop was the first in a series of EXtremeClimTwin ESRs workshops on Climate extremes to foster an outcome-oriented, interactive trainings.
The first day of the Workshop was dedicated to “Hydro-climate information sources and applications” by Prof. Dr. Robert Wilby. The aim of the morning session was: to introduce the hydromet information flow, to raise awareness of the various causes and types of errors that can occur within climate and hydrological data, and to cover ways of detecting errors and biases in climate and hydrological information flows.
The title of the lecture delivered by Dr. Manfred Mudelsee during the morning session on the second day was “Basic Introduction to Climate Time Series Analysis: Lecture”. The focus of the lecture was on the basics of climate time series analysis and the application of the different methods on climate extremes. The afternoon practical session was dedicated to presenting the software and its application to climate data.
On the third day of the Workshop, Dr. Carley Iles introduced the participants to climate models and climate reanalysis. The talk was about the global and regional climate models, their use in the studies of climate extremes, and impact studies. Dr. Tom Matthews hosted the afternoon session of the third day of the ESRs Workshop. The title of the practical session was “Programmatic downloading and manipulation of weather station data”.
Dr. Jana Sillmann presented her lecture on the fourth day of the Workshop. The title of the presentation was ”Weather and climate extremes - What are extreme events? How do we identify them? Indices of extreme temperature events; Extreme precipitation”. The afternoon, practical session was hosted by Dr. Marit Sandstad who introduced the participants to the NetCDF file format, their sources, structure, manipulation and visualization. The title of the presentation was “Downloading and working with netcdf files”
Quantum Geometry of the Ising model
No full textWe introduce some modern mathematical and theoretical tools in 2-dimensional physics, and apply them to the Ising model. We rederive some well-known results, but also some new properties of this important model. All the tools presented here have applications for beyond the Ising model.
We explore several aspects of conformal field theory, proving, analysing, and testing Zamolodchikov's C-theorem. We explore finite size effects in critical and non-critical systems on the cylinder and the torus, and discuss the implications of modular invariance. Using BCFT, we explore the implications for theories with a boundary, and look at an interesting relationship between BCFTs and non-critical theories for integrable models, which indicates that there is a deep link between conformal symmetry and the symmetry of integrability. Finally we explore the holographic projection of critical and off-critical models which relates flat 2-dimensional models to 3-dimensional gravity
<b>Applying global warming levels of emergence to highlight the increasing population exposure to temperature and precipitation extremes - Data & Codes</b>.
No full textData and material for the publication "Applying global warming levels of emergence to highlight the increasing population exposure to temperature and precipitation extremes" by Gampe et al. (2024). The folders contain the respective data sets and code to reproduce the corresponding figures in the manuscript. For any additional data and/or code please refer to the corresponding author.Gampe, D., Schwingshackl, C., Böhnisch, A., Mittermeier, M., Sandstad, M., & Wood, R. R. (2024). Applying global warming levels of emergence to highlight the increasing population exposure to temperature and precipitation extremes. Earth System Dynamics.</p
Sjeldne diagnoser i møte med NAV - En kvalitativ studie av personer med analatresi og Huntingtons og deres erfaring med NAV
No full textCorpuscular consideration of eternal inflation
No full textWe review the paradigm of eternal inflation in the light of the recently proposed corpuscular picture of space-time. Comparing the strength of the average fluctuation of the field up its potential with that of quantum depletion, we show that the latter can be dominant. We then study the full respective distributions in order to show that the fraction of the space-time which has an increasing potential is always below the eternal-inflation threshold. We prove that for monomial potentials eternal inflaton is excluded. This is likely to hold for other models as well
Baryon-number conservation in Bose-Einstein condensate black holes
No full textPrimordial black holes are studied in the Bose-Einstein condensate description of space-time. The question of baryon-number conservation is investigated with emphasis on the possible formation of bound states of the system's remaining captured baryons. This leads to distinct predictions both for the formation time, which for the naively natural assumptions is shown to lie between 10(-12) s and 10(12) s after the big bang, and for the remnant's mass, yielding approximately 3 x 10(23) kg in the same scheme. The consequences for astrophysically formed black holes are also considered.</p
JCA Book Reviews: <em>Wallanderland. Medieturisme og skandinavisk TV-krimi</em> by Anne Marit Waade
No full textThe Danish media theorist Anne Marit Waade explores in this timely study the phenomenon of media tourism, using tourism in the footsteps of Inspector Kurt Wallander as her example. The character of Wallander was invented in 1991 by the bestselling Swedish author Henning Mankell, one of the most successful authors of Nordic crime novels in recent decades, and further developed until 2009. The literary original has been translated and become successful in many countries including the UK, the US and Germany. The books were also adapted into several different TV series in Sweden (1994–2007, with Rolf Lassgård as Wallander, and 2004–2010, with Krister Henriksson) and in the UK (2008–2010, with Kenneth Branagh).</p
eine qualitative Untersuchung zu Potenzialen und Risiken bürgerschaftlichen Engagements im Grünflächenbereich vor dem Hintergrund des Wandels von Staat und Planung
No full textZweitveröffentlichungGemeinschaftsgärten unterscheiden sich von anderen urbanen Grünflächen dadurch, dass sie gemeinschaftlich und überwiegend unentgeltlich angelegt und gepflegt werden und einer breiteren Öffentlichkeit zur Verfügung stehen. Marit Rosol führt in ihrer stadtgeographischen Dissertation Gemeinschaftsgärten als einen neuen Freiraumtyp ein und analysiert ihn im Kontext aktueller Tendenzen der Freiraumpolitik, der Forschungen zum bürgerschaftlichen Engagement sowie des Wandels von Staat und Planung. Anhand von neun Berliner Fallbeispielen werden Gemeinschaftsgärten umfassend charakterisiert. Motive und Ziele der relevanten AkteurInnen werden ebenso herausgearbeitet wie Potenziale, Schwierigkeiten und Risiken. Schließlich leitet die Autorin praktische Handlungsempfehlungen sowohl für die GartenaktivistInnen als auch für die räumliche Planung ab. Dabei wird auch auf aktuelle Erfahrungen „grüner Zwischennutzungen“ sowie der community gardens in New York, Toronto und Seattle verwiesen. Gemeinschaftsgärten entstehen derzeit – so die These der Arbeit –vor dem Hintergrund eines gesellschaftlichen Wandels, der einerseits Freiräume für BewohnerInnen schafft, andererseits auch die Gefahr einer Abwälzung bislang kommunaler Aufgaben sowie eine ungleiche Versorgung mit öffentlichen Freiräumen befürchten lässt. Mit der Untersuchung der Bedingungen und Grenzen freiwilligen Engagements leistet die Arbeit einen empirischen und theoretischen Beitrag zur Diskussion um Stand und Entwicklung kommunaler Infrastrukturen.Community gardens differ from other urban green spaces like parks or allotments, because they are managed collectively and mostly voluntarily and are open to a broader public. Marit Rosol introduces community gardens as a new type of urban green spaces in Germany and analyses it in the context of landscape planning politics, research concerning civic engagement and changes of the (local) state and spatial planning. Based on qualitative research, especially in-depth interviews, nine Berlin case study community gardens are described comprehensively. Motivation and aims of the relevant actors as well as potentials, difficulties and risks are shown. Moreover the author gives practical advise both for gardening activists as for urban planners. For this purpose she also draws on experiences with “green” temporary uses as well as with community gardens in New York, Toronto and Seattle. Community gardens are currently coming into being in Berlin - so the thesis of the work - because of changes in society, which open up new opportunities for residents, but also imply the risk of downloading former state responsibilities onto them and unequal provision with open green spaces. With the study on conditions and barriers of voluntary engagement the work makes a theoretical and empirical contribution to the debates of state and development of municipal infrastructures
Effects of critical collapse on primordial black-hole mass spectra
No full textCertain inflationary models as well as realisations of phase transitions in the early Universe predict the formation of primordial black holes. For most mass ranges, the fraction of matter in the form of primordial black holes is limited by many different observations on various scales. Primordial black holes are assumed to be formed when overdensities that cross the horizon have Schwarzschild radii larger than the horizon. Traditionally it was therefore assumed that primordial black-hole masses were equal to the horizon mass at their time of formation. However, detailed calculations of their collapse show that primordial black holes formed at each point in time should rather form a spectrum of different masses, obeying critical scaling. Though this has been known for more than 15 years, the effect of this scaling behaviour is largely ignored when considering predictions for primordial black-hole mass spectra. In this paper we consider the critical collapse scaling for a variety of models which produce primordial black holes, and find that it generally leads to a shift, broadening and an overall decrease of the mass contained in primordial black holes. This effect is model and parameter dependent and cannot be contained by a constant rescaling of the spectrum; it can become important and should be taken into account when comparing to observational constraints
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