Search results for "Pf"
showing 10 items of 526 documents
Brief an Garlieb H. Merkel
1798
Ms. 930a, Nr. 12, Bl. 31r-34v Johannes Daniel Falk. Brief an Garlieb H. Merkel, Weimar, den 3. December 179[8?] Autora rokraksts / Autograph, vācu val. / Deutsch [8] lpp. / S. Attēlu numuri / Bildnummern: 930a-012-1, 930a-012-2-3, 930a-012-4-5, 930a-012-6-7, 930a-012-8 Im vorliegenden Brief vermischen sich private und berufliche Angelegenheiten sowie Klatsch miteinander. Nachdem Falk seine lange Antwortzeit zunächst damit begründet, dass er Merkels aktuelle Adresse nicht kenne, bringt er Neuigkeiten von der Krankheit einer nicht näher benannten Kammerrätin und nimmt an deren Leiden rege Anteil. Direkt im Anschluss präsentiert Falk den Stand seiner Verhandlungen mit Verlegern. Auch wenn Falk…
A natural and rigid model of quantum groups
1992
We introduce a natural (Frechet-Hopf) algebra A containing all generic Jimbo algebras U t (sl(2)) (as dense subalgebras). The Hopf structures on A extend (in a continuous way) the Hopf structures of generic U t (sl(2)). The Universal R-matrices converge in A\(\hat \otimes \)A. Using the (topological) dual of A, we recover the formalism of functions of noncommutative arguments. In addition, we show that all these Hopf structures on A are isomorphic (as bialgebras), and rigid in the category of bialgebras.
Minimal Morse flows on compact manifolds
2006
Abstract In this paper we prove, using the Poincare–Hopf inequalities, that a minimal number of non-degenerate singularities can be computed in terms only of abstract homological boundary information. Furthermore, this minimal number can be realized on some manifold with non-empty boundary satisfying the abstract homological boundary information. In fact, we present all possible indices and types (connecting or disconnecting) of singularities realizing this minimal number. The Euler characteristics of all manifolds realizing this minimal number are obtained and the associated Lyapunov graphs of Morse type are described and shown to have the lowest topological complexity.
A Survey of Continuous-Time Computation Theory
1997
Motivated partly by the resurgence of neural computation research, and partly by advances in device technology, there has been a recent increase of interest in analog, continuous-time computation. However, while special-case algorithms and devices are being developed, relatively little work exists on the general theory of continuous- time models of computation. In this paper, we survey the existing models and results in this area, and point to some of the open research questions. Final Draft peerReviewed
Are the new genetic tools for diagnosis of Wilson disease helpful in clinical practice?
2020
Summary The diagnosis of Wilson disease is not always easy. For many patients, a combination of tests reflecting disturbed copper metabolism may be needed. Testing for ATP7B variants has become part of the routine diagnostic approach. The methods of genetic testing include analysis of the 21 coding exons and intronic flanking sequences, in which exons with recurrent variants would be prioritised depending on the mutation frequency in the local population. If sequencing the entire ATP7B gene cannot identify 2 variants and the suspicion for Wilson disease is high, after reviewing the clinical data, WES (whole-exome sequencing) or WGS (whole-genome sequencing) could be applied. A workflow base…
Dracocephalum ruyschiana L. (Numerne, 1888)
1888
Nordischer Drachenkopf finden in lichte Kieferwaldhouge Nemerno. /// Ruiša pūķgalve, atradne: gaiša priežu meža nogāne Numernē. /// Northern Dragon-head, deposit: light pine forest slope in Numerne. [Attēls no LU Muzeja kolekcijas Herbarium Balticum (RIG I); (BOT2791_12)]
Dracocephalum ruyschiana L. (Ogres Kangari pie Ikšķiles)
1923
Nordischer Drachenkopf finden in sonnigers Abhang des Grandhügels am Ogre - Kanger bei Üxküll. /// Ruiša pūķgalve, atradne: liela kalna saulaina nogāze Ogres Kangaros pie Ikšķiles. /// Northern Dragon-head, deposit: sunny slope of the grand hill on the Ogre - Kanger near Ikskil. [Attēls no LU Muzeja kolekcijas Herbarium Balticum (RIG I); (BOT 2791_7)]
Dracocephalum ruyschiana L. (Grants-kalns pie Ogres Kangariem, Rīgas apriņķis)
1895
Nordischer Drachenkopf finden in Livland, Kreis Riga, Hügel, genannt "Grant-kalns" am Oger Kanger zwischen Üxkull und Oger. /// Ruiša pūķgalve, atradne: Livlande, Rīgas apriņķis, tā sautā "Grants-kalns" pie Ogres Kangariem starp Ikšķili un Ogri. /// Northern Dragon-head, deposit: Riga district, hill, called "Grant-kalns" on the Ogres Kangar between Ikskil and Ogre. [Attēls no LU Muzeja kolekcijas Herbarium Balticum (RIG I); (BOT2791_11)]
Dracocephalum ruyschiana L. (Svētezers, Livlande)
2020
Nordischer Drachenkopf. Karl Reinhold Kupffer Anmerkung: Von Herr Raudsep erhalten als bei Heiligensee in Livland gesamellt. Ende des 19., Anfang des 20. Jahrhunderts. /// Ruiša pūķgalve. Uzraksts: no Raudsepa kunga saņemts kā pie Svētezera Livlandē ievākts. 19.gadsimta beigas, 20. gadsimta sākums. /// Northern Dragon-head. Annotation: received from Mr. Raudsepp as collected at Svētezers in Livland.Late 19th century, early 20th century. [Attēls no LU Muzeja kolekcijas Herbarium Balticum (RIG I); (BOT2791_5).]
Optimal Operating Point Calculation for Medium Voltage Distribution Systems
2007
The paper deals with the calculation of the optimal working point of a distribution system, equipped with several distributed generators, able to operate also autonomously, i.e. disconnected from the main grid. When connected to the main grid, it appears in general convenient to assign the slack bus role to the bus that represents such a connection. The problem becomes more complex when maximum power transfer constraints through the connection must be taken into account. The adequate slack bus treatment is even more important when the optimal operating condition must refer to the condition subsequent to an intentional or unintentional disconnection from the main grid. The paper presents an …