734 research outputs found
Professor Ingvar Kärnefelt - a birthday tribute
No full textOn 19 July 2009 Ingvar Kärnefelt celebrated his 65th birthday. This could have meant that we, his former students, would be celebrating him in his retirement from his position as head of the Biological Museums at Lund University. We are grateful that this is not the case, as Ingvar will carry on, probably for at least one or two more years. Instead, we celebrate Ingvar because he is the main reason for all of us having studied lichenology in Lund. This special issue of The Lichenologist is dedicated to him as a birthday tribute in honour of his long and fruitful lichenological career. The main authors of all the papers in this issue are former students of Ingvar. For several of us he has not only acted as supervisor but later also as the director of the Botanical Museum where we meet him in our daily work.</p
Combining Keynes and Schumpeter. Ingvar Svennilson's Contribution to the Swedish Growth School and Modern Economics
No full textIn a study of European growth in the interwar period, the Swedish economist Ingvar Svennilson integrated a Keynesian theory of cumulative growth with a Schumpeterian analysis of economic transformation. Svennilson emphasised that innovations and the use of new technologies had been stimulated by high demand and production growth. Svennilson’s strong commitment to "Vendoorn's Law" which actually was "Svennilson's Law", made it difficult to incorporate him in a Schumpeterian tradition. A synthesis between Keynes and Schumpeter with Svennilson as a mediator was also prevented by the decisive role of entrepreneurship and the critique of Keynesian models in works by Schumpeter and the Swedish growth school. However, a synthesis has been facilitated by neo-Schumpeterian theories of demand-led innovations and cumulative economic processes. Svennilson’s study has been superseded by later contributions to economics except for a theory of a negative, "Keynesian", relationship between unemployment and growth and an exceptional "un-Verdoornian" theory that high aggregate demand may lead to crowding-out of new firms from capital markets. Besides, Svennilson's integration of short run and long run macro analysis and of theoretical and empirical work is still a fruitful research strategy in economics.Innovations; Cumulative Growth; Productivity Growth; Verdoorn’s Law; Swedish Growth School
Austrian lichenologists exploring the Alps
No full textBiographic sketches are provided for 19 of Austrian botanists who contributed in different ways to the knowledge on lichens of the European Alps: Othmar Breuss, Carl Wilhelm von Dalla Torre, Helmut Gams, Georg Gärtner, Martin Grube, Josef Hafellner, Karl von Keissler, Ernst Kernstock, Helmut Mayrhofer, Walter Obermayer, Josef Poelt, Karl Redinger, Julius Steiner, Elfriede Stocker-Wörgötter, Elisabeth Tschermak-Woess, Franz X. von Wulfen, and Alexander Zahlbruckner
A key to the Parmeliaceae in the Alps with notes on their distribution and phylogeny
No full textA key to the lichen family Parmeliaceae in the Alps is presented. Notes on their distribution and phylogeny are added. The family is represented in the Alps by 41 genera and c. 147 species
sj-docx-2-dhj-10.1177_20552076231152160 - Supplemental material for Development of the key performance indicators for digital health interventions: A scoping review
No full textSupplemental material, sj-docx-2-dhj-10.1177_20552076231152160 for Development of the key performance indicators for digital health interventions: A scoping review by Maria Brenner, Arielle Weir, Margaret McCann, Carmel Doyle, Mary Hughes, Anne Moen, Martin Ingvar, Koen Nauwelaerts, Eva Turk and Catherine McCabe in Digital Health</p
sj-docx-1-dhj-10.1177_20552076231152160 - Supplemental material for Development of the key performance indicators for digital health interventions: A scoping review
No full textSupplemental material, sj-docx-1-dhj-10.1177_20552076231152160 for Development of the key performance indicators for digital health interventions: A scoping review by Maria Brenner, Arielle Weir, Margaret McCann, Carmel Doyle, Mary Hughes, Anne Moen, Martin Ingvar, Koen Nauwelaerts, Eva Turk and Catherine McCabe in Digital Health</p
«Det absurde ved å være fanget i blodbankende materie»: Om rus og litteratur i Ingvar Ambjørnsens \u27Skogens hjerte\u27
No full textThis article explores Norwegian author Ingvar Ambjørnsen’s short story «The Heart of the Forest» from his collection Dark Dawn (1997) and focuses on the story’s prime experience, that of drugs. Peter Sloterdijk’s account of the historical development of drugs from the early Greek era to modernity is the theoretical framework. His understanding is found in Ambjørnsen’s short text, which also contains a notion of intertextuality. Therefore, the article highlights both literary (Vesaas) and philosophical references (Huxley). «The Heart of the Forest» is also the precursor for Ambjørnsen’s novel The Night Dreaming of Day (2012), which implies that the author sampled his own short story and gave it a pessimistic reinterpretation.Artikkelen undersøker Ingvar Ambjørnsens novelle «Skogens hjerte» fra novellesamlingen Natt til mørk morgen (1997) og fokuserer på fremstillingen av ruserfaringer som står sentralt i teksten. Utgangspunktet for lesningen er Peter Sloterdijks beskrivelse av den historiske utviklingen av ruserfaringer fra antikken til det moderne. Hans forståelse finner man også i Ambjørnsens korttekst, men denne omfatter dessuten en bestemt bruk av intertekstualitet. Herved fokuseres det både på litterære (f.eks. Vesaas) og idéhistoriske referanser (Huxley). «Skogens hjerte» ble i tillegg det intertekstuelle forelegget for deler av Ambjørnsens roman Natten drømmer om dagen (2012). På en måte ‘sampler’ forfatteren sin egen novelle, som får en mer pessimistisk omfortolking
Relativistic Many-Body Theory: A New Field-Theoretical Approach
No full textRelativistic Many-Body Theory treats — for the first time — the combination of relativistic atomic many-body theory with quantum-electrodynamics (QED) in a unified manner. This book can be regarded as a continuation of the book by Lindgren and Morrison, Atomic Many-Body Theory (Springer 1986), which deals with the non-relativistic theory of many-electron systems, describing several means of treating the electron correlation to essentially all orders of perturbation theory. The treatment of the present book is based upon quantum-field theory, and demonstrates that when the procedure is carried to all orders of perturbation theory, two-particle systems are fully compatible with the relativistically covariant Bethe-Salpeter equation. This procedure can be applied to arbitrary open-shell systems, in analogy with the standard many-body theory, and it is also applicable to systems with more than two particles. Presently existing theoretical procedures for treating atomic systems are, in several cases, insufficient to explain the accurate experimental data recently obtained, particularly for highly charged ions. This shortcoming is expected to be due to omission of combined QED-correlational effects, included in the new unified procedure. All methods treated in Relativistic Many-Body Theory are illustrated with numerical examples. The main text is divided into three parts. In Part I, the standard time-independent and time-dependent perturbation procedures are reviewed. Part II describes three methods for QED calculations, a) the standard S-matrix formulation, b) the Two-times Green’s-function method, developed by the St Petersburg Atomic Theory group, and c) the Covariant-evolution-operator (CEO) method, recently developed by the Gothenburg Atomic Theory group. In Part III, the CEO method is combined with electron correlation to arbitrary order to a unified MBPT-QED procedure. In this procedure the electron correlation can be included to high order, and therefore this procedure is expected to lead to faster convergence than treating the BS equation order by order. Ingvar Lindgren is also the author of the highly-cited "Atomic Many-Body Theory" book published by Springer
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