657 research outputs found
Økonomi på tværs:Festskrift til Jesper Jespersen
No full textI dette festskrift fortæller en række danske økonomer, hvordan deres kollega Jesper Jespersen har sat gedigne aftryk på dansk økonomisk forskning. Han har været et fyrtårn som fortaler for den keynesianske økonomi og dens teorier – selv i en mere og mere neoliberal verden.Professor Jesper Jespersen er en institution inden for dansk økonomisk forskning. Økonomi på tværs er udkommet i anledning af hans pensionering i marts 2019. Bogen består af bidrag fra Jespersens kollegaer, og hver artikel i bogen koncentrerer sig om emner, der har ligget Jesper Jespersen nært i hans egen forskning, f.eks. de ministerielle regnemodeller, neoliberalismen, finanskrise, borgerløn og Brexit.Jesper Jespersen er kendt af mange som 'den røde økonom'. Han har dog hverken været marxist (som beskyldningen lød i 1990’erne) eller borgerlig (som han blev påduttet i 1970’erne). Derimod har Jespersen på tværs af politiske strømninger holdt fast i sit ståsted: John Maynard Keynes’ tanker og teorier.Jesper Jespersen har på landsplan og internationalt markeret sig som en hård kritiker af den udvikling, der har ledt til, at politik og sociale forhold ses som arenaer for konkurrence og individuel nyttemaksimering, og han har skarpt kritiseret Finansministeriets regnemodeller for subjektivitet. Hans bidrag til dansk økonomisk forskning er ikke til at overse
Picard - an electrostatic particle in cell simulation code
No full textThis is a particle-in-cell plasma code 'picard' that was developed
by Jesper Lindkvist and Herbert Gunell with start in 2016 using
resources provided by the Swedish National Infrastructure for
Computing (SNIC) at the High Performance Computing Center North
(HPC2N), Umeå University, Sweden. Jesper Lindkvist was funded by
the Swedish National Space Board (SNSB project 201/15) and
Herbert Gunell by the Swedish National Space Agency (SNSA
project 108/18).
A paper based on the first version was published in A&A .
The present version has been updated to include ionisation as a source of cometary ions, and hdf5 files are used for writing the output. The changes in this version were made by Herbert Gunell.
The files included are:
picard.tgz Package containing all source file, some matlab m-files
that can be used for plotting of the results, and an input
file that was used for a simulation that will be used in an
upcoming publication by Herbert Gunell and Charlotte Götz.
fig-cur.mp4 Videoclip showing results from the simulation defined by the input file, specifically
three-dimensional current paths from different angles.
@author : Jesper Lindkvist
Email : [email protected]
@author : Herbert Gunell
Email : [email protected]
Validity of the definite and semidefinite questionnaire version of the Hamilton Depression Scale, the Hamilton subscale and the Melancholia Scale. Part I.
No full textInstruments for self-rating in depression are available, but their psychometric properties have not been fully explored; discrepancies with clinician ratings have been identified. This study was longitudinal with 85 patients fulfilling the DSM-III-R diagnosis of Seasonal Affective Disorder. Self-reporting versions (definitely and semidefinitely anchored) corresponding to the Hamilton Depression Scale (HAMD), the Hamilton Subscale (HAM6), and the Bech-Rafaelsen Melancholia Scale (MES) were compared to each other and the clinician-rated version. The unidimensional property of the sum score in each scale was tested by the item-response theory model ad modum Rasch. The scales were also tested for their sensitivity to discriminate between placebo and citalopram therapy. The sum scores and the sum score variances of the definite self-rating versions did not differ significantly from the sum scores of the corresponding observer scales at any of the five time points. The semidefinite scales significantly over-scored at all time points. The convergent validity between corresponding definite self-ratings and observer ratings was very high with correlations exceeding 0.90. Only item responses from the MES, the HAM6, and their corresponding definite versions of the self-rating questionnaires DMQ and DHAM6 were accepted by the Rasch analysis, and only these four valid scales discriminated significantly between the effect of citalopram and placebo treatment. Our results are limited to patients with moderate depression. Two new self-report scales with unparalleled construct validity, reliability, sensitivity, and convergent validity have been identified (DMQ and DHAM6). We have also identified a crucial importance of format for the means and variances of self-rating scales. These findings are of high practical and scientific value
Type Theory Unchained: Extending Agda with User-Defined Rewrite Rules
No full textDependently typed languages such as Coq and Agda can statically guarantee the correctness of our proofs and programs. To provide this guarantee, they restrict users to certain schemes a- such as strictly positive datatypes, complete case analysis, and well-founded induction a- that are known to be safe. However, these restrictions can be too strict, making programs and proofs harder to write than necessary. On a higher level, they also prevent us from imagining the different ways the language could be extended. In this paper I show how to extend a dependently typed language with user-defined higher-order non-linear rewrite rules. Rewrite rules are a form of equality reflection that is applied automatically by the typechecker. I have implemented rewrite rules as an extension to Agda, and I give six examples how to use them both to make proofs easier and to experiment with extensions of type theory. I also show how to make rewrite rules interact well with other features of Agda such as-equality, implicit arguments, data and record types, irrelevance, and universe level polymorphism. Thus rewrite rules break the chains on computation and put its power back into the hands of its rightful owner: Yours.Programming Language
35 frågor och svar inför en edering av Jesper Swedbergs Swensk Ordabok
No full textIn this paper, the author accounts for his work on editing an early 18th centurydictionary manuscript, bishop Jesper Swedberg’s Swensk Ordabok. A similar project– i.e. editing an old, hitherto unpublished dictionary manuscript – has beenperformed in Sweden only once before. This means that there is no tradition onwhich the solution of many problems concerning the edition of Swedberg'sdictionary could be based. For instance, there are no less than five manuscriptversions. Which of them should be selected as the basis manuscript of the edition,and to what extent should the differences between the manuscripts be accounted forin the edition? As argued by the author, none of the manuscripts written bySwedberg himself can serve as the basis manuscript, since they are all incomplete.Also, a relatively restricted account of the differences between the manuscripts issuggested; otherwise, the readability of the edition would be too low
Lost and found:om virkelighed og samfundsøkonomisk videnskab
No full textDet neoklassiske paradigme afskrev fra slutningen af det 19. århundrede virkelighedens betydning for det videnskabelige arbejde med samfundsøkonomi. Dette præger fortsat hovedstrømmen og bidrager til at vanskeliggøre den økonomiske videnskabs arbejde med at begribe og forstå den samfundsmæssige samtid. Bidraget undersøger primært Jesper Jespersens forsøg på at genindføre virkeligheden i makroøkonomisk videnskab ved at trække på kritisk realistisk videnskabsfilosofi
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