98,263 research outputs found
The Riccati Equation
No full textcontributions by G. Ammar, T. Basar, R. Bitmead, S. Bittanti, F. M. C. Callier, P. Colaneri, G. De Nicolao, M. Gevers, V. Kucera, P. Lancaster, A. J. Laub, C.F. Martin, L. Rodman, M. A. Shayman, H. L. Trentelman, J. L. Willems, J. C. Willem
Paris-Concert n°1 - Recueil Willems 7 chansons [Victor Willems (1884-1939 parolier éditeur)] [portrait de Victor Willems nc]
No full textParis-Concert n°1 - Recueil Willems 7 chansons [Victor Willems (1884-1939 parolier éditeur)] [portrait de Victor Willems nc] ; exemplaire agraphé ; édition belge Willems, 23 Faubourg Saint-Denis, Paris ;datation 1919 par contexte (Landru, loi des huit heures) ; contient : 1) “La chaumière d’amour”, paroles Willems et Dommel / musique de Montlery [Benoist Treynet dit Montléry (18..-19.. compositeur)] et Defoisde, incipit “Bien que souffrant de son dédain” [titre inconnu BNF] ; 2) “Gardtagalette ou Le vrai tuyau du jour : chanson d’actualité sur la reprise des courses”, peut se chanter sur l’air de “Celle que j’aime est parmi vous”, incipit “Viv’ la Paix, viv’ le bon temps” [sans musique] [auteurs et éditeur du timbre non précisés, Jean Rodor et J. Bertet [Jean Bertet (1887-1962)] / Vincent Scotto / ed. Henri Delormel ©1917 / créée par Georgel] [titre inconnu BNF] ; 3) “Pour le baiser de celle qu’on aime”, paroles Jean Rodor et Willems, musique Eugène Gavel, incipit “Il a vingt ans et dans la vie, / L'homme va chercher le bonheur” ; 4) “Les huit heures : chanson d’actualités”, se chante sur l’air de “Quand on vient en permission”, incipit “Enfin ça y est nos députés”, publié avec l’autorisation de Mr Dufrenne, éditeur [sans musique] [auteurs du timbre non précisés, Fernand Maisondieu et Ch. Pothier / Paul Dalbret / ed. Oscar Dufrenne ©1918 / créée par Dalbret] [titre inconnu BNF] ; 5) “Le chant du retour : créé par Dona le chanteur populaire” [Gaston Dona], “hommage au Maréchal Joffre”, paroles et musique de Willems ; 6) “Le sérail à Landru”, peut se chanter sur l’air de “Elle m’aime pas”, incipit “Combien d’homm’s se fourr’nt les doigts dans l’ nez”, refrain : “J’ peux en faire que des chipolatas”, chanson publiée avec l’autorisation de Messieurs Pauley et [Charles] Jardin [sans musique] [timbre : Pauley / Charles Jardin / auto-éditée s.d. / créée par Dranem] [chanson inconnue BNF en musique imprimée, connue en enregistrements] ; 7) “Un jour viendra”, paroles de Willems et Dommel, musique de E. Jaquinot et G. Robichon, incipit “J’ t’aime follement comme on aime d’amour”, refrain “Un jour viendra / Où, lassé des menteuses caresses, / Tu reviendras”. [titre inconnu BNF] //
The subspace Nevanlinna interpolation problem and the most powerful unfalsified model
No full textA generalization of the tangential Nevanlinna interpolation problem will be studied from a behavioral point of view. Necessary and sufficient conditions for its solvability and a characterization of art its solutions are derived. These results are obtained by associating to the interpolation data a behavior that enjoys a special structure. (C) 1997 Elsevier Science B.V
En cueillant des pissenlits : chanson gaie chantée par Giselle, Lona-Dilva, Morin, Berthe Sylva, Constantin, Charl. Desbly, Flory Marc … (17 artistes) [verso photo NC de Victor Willems] [photo non-créditée de Giselle] [illustration anonyme]
No full textEn cueillant des pissenlits : chanson gaie chantée par Giselle, Lona-Dilva, Morin, Berthe Sylva, Constantin, Charl. Desbly, Flory Marc, E. Castel, Saunières, Elise Puget, Signard, Fonta, S. d’Avricourt, Méryal, Lili Warton, Simone Dorgeval, Andrée Dorsy (17 artistes) ; (dédicace) “à Lucette de Verly & G. Périer” ; “Les chansons de Willems” [Victor Willems (1884-1939 parolier éditeur)] ; “Répertoire Giselle” ; photo non-créditée de Giselle ; illustration anonyme (frise ornementale) ; paroles de Victor Willems ; musique de D. Berniaux & Willy Michels ; Philippo éditeur, 24 boulevard Poissonnière, Paris ; ©1914 by Philippo ; imprimerie Cavel ; [intérieur : aucune (mention artiste, chansons de…, répertoire, dédicace, sous-titre) ; cotage L75 (? papier grignoté par une souris) ; Ch. Douin gravure ; imprimerie Cavel frères] ; verso “Du même auteur” (8 titres avec photo NC de Victor Willems medihal-01510157) ; incipit “Dans une hôtellerie” ; datation (titre et exemplaire) 1914 par ©, cotage (Daphy, éditeur inconnu de D&L) et analyse des titres au verso
Uncinorhynchus linusi Willems & Artois, n. sp.
No full textUncinorhynchus linusi Willems & Artois n. sp. (Fig. 2 E–H) Locality. iSimangaliso Wetland Park, Lake St. Lucia estuary, detritus-rich, fine-grained sand taken from the land side of a sandbank that cuts off the estuary from the Indian Ocean, December 16, 2009 (type locality). Material. One animal studied alive and whole mounted, designated holotype (SMNH, Type-8853). Etymology. Species dedicated to Linus Willems, the first author’s son. Diagnosis. Unpigmented species of Uncinorhynchus, lacking eyes; proboscis hooks ± 37 µm high with basal wings ± 33 µm long and a dagger-like hook; complex male hard part consisting of a 30 µm-long, hollow stylet, attached to a 35 µm-long, club-shaped plate and an 18 µm-long, spine-like projection. Description. Habitus and general organisation are almost identical to those of other species of Uncinorhynchus Karling, 1947 (see Karling 1947, 1989; Brunet 1973b). The rather slender animal is mainly colourless with a brownish intestine, and lacks eyes. It is 1.7 mm long (measured on a whole-mounted specimen). The pharynx is situated almost at midbody. The proboscis is approximately 1/10 of the body length long and carries two proboscis hooks (Fig. 2 E: h, 2F), which are 36–38 µm high, each with two 29–37-µm-long basal wings and a rather straight, dagger-like hook. Testis and ovary unpaired; a vitellarium could not be observed. The prostate vesicle is elongated and somewhat pear-shaped. It encloses the prostate glands, which have clearly-visible extracapsular parts, and a small internal seminal vesicle. Proximally, this internal seminal vesicle is connected to a large, external seminal vesicle. Distally, the prostate vesicle is connected to a complex hard part (Fig. 2 E: pst, 2G–H), which consists of the hollow stylet, a spine-like projection (x in Fig. 2 G) and a club-shaped plate (y in Fig. 2 G). The stylet proper is 30 µm long and has a cup-shaped, 12 - µm-wide proximal part and a curved and slender distal part. At the convex side of the cup-shaped part, the stylet carries a perpendicularly-bent, spine-like projection, which is 18 µm long. Additionally, the proximal part of the stylet also carries a 35 µm-long, bent, plate-like part, which is very slender proximally with a distal rectangular part, giving it the overall appearance of a golf club. Discussion. Species of Uncinorhynchus are characterised by the typical shape of their proboscis hooks, the absence of eyes, a hook-shaped stylet and the absence of a bursal organ in the female genital system (Karling 1947, 1952, 1989; Brunet 1973b; Kolasa 1977; Willems et al. 2007). At present, seven species are known, which can be distinguished from each other by the detailed structure of the stylet. Whereas the stylet is triangular in shape without any attached processes in U. flavidus Karling, 1947, U. karlingi Kolasa, 1977 and U. vorago Willems et al., 2007, it is funnel-shaped and carries a plate-like part in U. hamatus Brunet, 1973, U. pacificus Karling, 1989, U. proporus Brunet, 1973, U. westbladi Karling, 1952, and the new South African species. However, in U. linusi n. sp. this plate-like extension is only slightly curved, ends bluntly and is attached to the concave side of the stylet, whereas in the other four species the extension is spine-like, bent perpendicularly, has a sharp distal point and is attached to the convex side of the stylet. In addition, the stylet of U. linusi n. sp. carries a second, club-shaped projection, which is missing in all other species.Published as part of Willems, Wim R., Reygel, Patrick, Steenkiste, Niels Van, Tessens, Bart & Artois, Tom J., 2017, Kalyptorhynchia (Platyhelminthes: Rhabdocoela) from KwaZulu-Natal (South Africa), with the description of six new species, pp. 441-466 in Zootaxa 4242 (3) on pages 445-446, DOI: 10.11646/zootaxa.4242.3.2, http://zenodo.org/record/37690
An input-output continuous-time version of Willems’ lemma
No full textWe illustrate a novel version of Willems’ lemma for data-based representation of continuous-time systems. The main novelties compared to previous works are two. First, the proposed framework relies only on measured input-output trajectories from the system and no internal (state) information is required. Second, our system representation makes use of exact system trajectories, without resorting to orthogonal bases representations and consequent approximations. We first establish sufficient and necessary conditions for data-based generation of system trajectories in terms of suitable latent variables. Subsequently, we reformulate these conditions using measured input-output data and show how to span the full behavior of the system. Furthermore, we show how to use the developed framework to solve the data-based continuous-time simulation problem
Innovation and Governance in International Food Supply Chains: The Cases of Ghanaian Pineapples and South African Grapes
No full textThis paper reports an exploratory case study on innovation in, and governance of, international supply chains originating in developing countries. Two African fruit export chains are analyzed: the table grape chain from South Africa (a highly developed chain) and the pineapple chain from Ghana (a newly emerging chain). The most important market for both chains is the EU. The two cases present complementary perspectives on international supply chain development. The paper shows that Western demands in these cases lead to innovation at the producer end of the international supply chain and changes in governance structures towards chain coordination and vertical integration.international supply chains, innovation, governance, developing countries., Agribusiness, International Development, International Relations/Trade, Production Economics, Productivity Analysis,
On a Continuous-Time Version of Willems' Lemma
No full textIn this paper, a method to represent every input-output trajectory of a
continuous-time linear system in terms of previously collected data is
presented. This corresponds to a continuous-time version of the well-known
Willems' lemma. The result is obtained by sampling the continuous signals at
regular intervals, and constructing Hankel-like structures that closely
resemble their discrete-time counterparts. Then, it is shown how to use
measured persistently excited data to design a time-varying vector of
parameters that allows the generation of arbitrary piecewise differentiable
trajectories. A class of input signals that satisfies the conditions for
persistence of excitation is also provided.Comment: 6 pages, conference pape
Stenostomum steveoi Larsson & Willems, 2010, n. sp.
No full textStenostomum steveoi n. sp. (Fig. 3 F–H) Synonyms: Stenostomum smallpit (Larsson et al. 2008.) Localities. Loc. 11 (type locality), 16, 33. Material. Several individuals studied alive. Photograph (fig. 3 G) designated holotype (SMNH no. 7372), one serially-sectioned animal designated paratype (SMNH nos. 7373). There are DNA-sequences (accession numbers: FJ 196331, FJ 384890, FJ 384851, FJ 384939, FJ 384897, FJ 384872), which will facilitate unambiguous identification (see Larsson et al. 2008). Etymology. Species named after the first author’s dog Steve-O, a devoted fieldwork companion. Description. The length of the animal is 0.3 mm and animals with one or two zooids were observed. Specimens are white in incident light with a dark gut containing excretophores, which are more numerous close to the pharynx. The excretophores are white in incident light and appears black in reflected light. The body is slender and evenly-shaped with the posterior end slightly tapering. The anterior end is short, mobile and prostomium-like. The epidermis is entirely covered with short cilia. Epidermal rhabdoids absent. The ciliated pits are small and situated close to the anterior end. The anterior brain lobes are distinct with “metamerical” arranged ganglia consisting of six compartments, giving a striped appearance. The posterior brain lobes do not have this striped appearance and are situated posterior to the ciliated pits. Refractile organs are absent. The large ventral mouth opening is situated at approximately ¼ of the body length, and can be closed by a strong sphincter. When open, the mouth often is oval or rectangular in shape. The pharynx is simple and muscular and clearly visible in the living animal. The length of the pharynx is 1 / 5 of the total length. The sinuous protonephridium starts at the anterior brain lobes and ends in a nephridiopore in the posterior end of the animal. Individuals with a developed genital system were not found. Diagnosis. Stenostomum steveoi n. sp.: species of Stenostomum with one or two zooids, a short prostomium-like anterior end, small ciliated pits close to the anterior end, anterior brain lobes with six metamerically arranged compartments, large oval to rectangular mouth opening, which can be closed by a sphincter, pharynx conspicuous in live animals. Refractile organs absent. Discussion. Stenostomum steveoi is without doubt a member of the taxon Stenostomum. The most striking character of this species is the shape of the large mouth opening with a conspicuous sphincter, as seen in live individuals. This type of elongated mouth opening is also seen in Stenostomum membranosum Kepner & Carter, 1931 and Stenostomum saliens Kepner & Carter, 1931 (see Kepner & Carter 1931). S. membranosum lacks excretophores and the cilated pits are longer than in S. steveoi (Kepner & Carter 1931). In S. saliens excreteophores are absent, the cilated pits are small and close to the anterior end and the brain lobes are larger and more conspicuous than in S. steveoi (Kepner & Carter 1931). The short prostomium-like anterior end with its six metamerical compartments of the anterior brain lobes gives it a striped appearance. This is somewhat similar to the longer prostomium of S. anatirostrum (Noreña et al. 2005), S. bryophilum (Luther 1960), S. glandulosum (Noreña et al. 2005) and S. handoelense (see discussion of S. handoelense) but S. steveoi has much smaller cilated pits than those species. According to the molecular analyses of Swedish Catenulida in Larsson et al. 2008 (see figure 2), the closest relatives of S. steveoi are two other newly described species, S. handoelense and S. heebuktense.Published as part of Larsson, Karolina & Willems, Wim, 2010, Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species, pp. 1-18 in Zootaxa 2396 on pages 9-10, DOI: 10.5281/zenodo.19396
[correspondence] Brief van Antoine Guillaume Bernard Schayès aan Jan Frans Willems.
No full textBrussel, 17/03/1837Bols, Jan. Brieven aan Jan-Frans Willems (1909). Briefnummer: 351Bijzondere collectie
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