120,007 research outputs found
High power fiber sources: more than kilowatts
No full textFiber lasers and amplifiers have reached several kilowatts of output power, and offer many attractions beyond raw power. This tutorial discusses basic scientific and practical issues of fiber sources, and advantages and limitations that derive from them
Introduction à la flore pollinique Scandinave, de G. Erdtman, J. Praglowski et S. Nilsson
No full textElhaï Henri. Introduction à la flore pollinique Scandinave, de G. Erdtman, J. Praglowski et S. Nilsson. In: Annales de Géographie, t. 74, n°404, 1965. p. 477
Introduction à la flore pollinique Scandinave, de G. Erdtman, J. Praglowski et S. Nilsson
No full textElhaï Henri. Introduction à la flore pollinique Scandinave, de G. Erdtman, J. Praglowski et S. Nilsson. In: Annales de Géographie, t. 74, n°404, 1965. p. 477
S. Wide et P. Nilsson, Griechische und römische Religion, 4e édition, B. G. Teubner, Leipzig, 1931
No full textBill Auguste. S. Wide et P. Nilsson, Griechische und römische Religion, 4e édition, B. G. Teubner, Leipzig, 1931. In: Revue d'histoire et de philosophie religieuses, 13e année n°2, Mars-avril 1933. pp. 181-182
Generalized Proportional Allocation Policies for Robust Control of Dynamical Flow Networks
No full textWe study a robust control problem for dynamical flow networks. In the considered framework, traffic flows along the links of a transportation network —modeled as a capacited multigraph— and queues up at the nodes, whereby control policies determine which incoming queues are to be allocated service simultaneously, within some predetermined scheduling constraints. We first prove fundamental performance limitations on the system performance by showing that for a dynamical flow network to be stabilizable by some control policy it is necessary that the exogenous inflows belong to a certain stability region, that is determined by the network topology, the link capacities, and the scheduling constraints. Then, we introduce a family of distributed controls, referred to as Generalized Proportional Allocation (GPA) policies, and prove that they stabilize a dynamical transportation network whenever the exogenous inflows belong to such stability region. The proposed GPA control policies are decentralized and fully scalable as they rely on local feedback information only. Differently from previously studied maximally stabilizing control strategies, the GPA control policies do not require any global information about the network topology, the exogenous inflows, or the routing, which makes them robust to unpredicted network load variations and changes in the link capacities or the routing decisions. Moreover, the proposed GPA control policies also take into account the overhead time while switching between services. Our theoretical results find one application in the control of urban traffic networks with signalized intersections, where vehicles have to queue up at junctions and the traffic signal controls determine the green light allocation to the different incoming lanes
Svensk Botanisk Tidskrift : Volym 115: Häfte 4, 2021
No full textHäfte 4 195 Föreningsnytt Ordföranden har ordet: Ses vi på föreningskonferensen? 196–203 Kortare texter Andersson, U.-B., Fröberg, L., Nilsson, E. V., Stridh, B. 204 Reportage Utmarksbete vid Stensjö by Nilsson, E. V. 210 Hur skiljer man pipdån från toppdån Engfeldt, P. & Nilsson, E. V. 214 Inventering av kärlväxter i Stora Sjöfallets lågland Fröberg, L. 220 Norr möter söder på Söderåsen Risberg, B. 246 Gaffelglim i Ingas herbarium Björkman, G. 224 Artiklar Kalkbrytning hotar unik natur Petersson, J. 230 Biologiska museet listar nya arter för Sverige 2020 Tyler, T. 236 Årtusenden av jordbruk födde Herröns mångfald Olsson, G. A., Svensson, R. & Jonasson, I. 248 Läsvärt Finlands vedartade växter Sallmén, N. 249 Ädellövskogens flora på hundra sidor Nilsson, E.V. 250 Pedagogisk och mångsidig orkidébok Andersson, U.-B. 251 Illustrationer av Gotlands orkidéer Andersson, U.B. 252 Botaniska nycklar är ett nytt verktyg för artbestämning 253 Läger för floraväktare i Ulricehamn 254 Floraväktarsamordnare samlades i Halland 255 Till minne av Örjan Nilsson 256 Föreningskonferens och årsmöte 2022 256 Läger för floraväktare i Sunne, Värmland Omslagets insida Hitta din medlemsförening
Svensk Botanisk Tidskrift : Volym 115: Häfte 4, 2021
No full textHäfte 4 195 Föreningsnytt Ordföranden har ordet: Ses vi på föreningskonferensen? 196–203 Kortare texter Andersson, U.-B., Fröberg, L., Nilsson, E. V., Stridh, B. 204 Reportage Utmarksbete vid Stensjö by Nilsson, E. V. 210 Hur skiljer man pipdån från toppdån Engfeldt, P. & Nilsson, E. V. 214 Inventering av kärlväxter i Stora Sjöfallets lågland Fröberg, L. 220 Norr möter söder på Söderåsen Risberg, B. 246 Gaffelglim i Ingas herbarium Björkman, G. 224 Artiklar Kalkbrytning hotar unik natur Petersson, J. 230 Biologiska museet listar nya arter för Sverige 2020 Tyler, T. 236 Årtusenden av jordbruk födde Herröns mångfald Olsson, G. A., Svensson, R. & Jonasson, I. 248 Läsvärt Finlands vedartade växter Sallmén, N. 249 Ädellövskogens flora på hundra sidor Nilsson, E.V. 250 Pedagogisk och mångsidig orkidébok Andersson, U.-B. 251 Illustrationer av Gotlands orkidéer Andersson, U.B. 252 Botaniska nycklar är ett nytt verktyg för artbestämning 253 Läger för floraväktare i Ulricehamn 254 Floraväktarsamordnare samlades i Halland 255 Till minne av Örjan Nilsson 256 Föreningskonferens och årsmöte 2022 256 Läger för floraväktare i Sunne, Värmland Omslagets insida Hitta din medlemsförening
Platynectes major Nilsson 1998
No full textPlatynectes major Nilsson, 1998 (Figs 4C, 7F–G, 9C, 12A) Platynectes dissimilis major Nilsson, 1998: 114 (orig. descr.). Platynectes major Nilsson, 1998: Šťastný 2003: 233 (n. stat.). Type locality. “S Vietnam, N Dalat, Lang Bian”. Type material. Holotype ♂, deposited in NHMW. Material examined. CHINA: Yunnan: 2 ♂, 4 ♀, Lvchun County, ditches and terraces by the roadside, 22.8856N, 102.3264E, 1440 m, 1.v.2021, Z. Jiang, Z. Yang & Z. Mai leg. (SYSU). Notes. Habitus and male genitalia are given in Figs 4C and 7F–G. Collection details. The specimens from Lvchun were collected in ditches by the roadside (Fig. 9C). Distribution. Southern China (Yunnan) (Fig. 12A).Published as part of Jiang, Zhuo-Yin, Zhao, Shuang, Jia, Feng-Long & Šťastný, Jaroslav, 2023, Two new species of Platynectes Régimbart, 1879 from China with notes on other Chinese members of the genus, including a key to species (Coleoptera: Dytiscidae: Agabinae), pp. 401-425 in Zootaxa 5227 (4) on page 410, DOI: 10.11646/zootaxa.5227.4.1, http://zenodo.org/record/751887
On the well-posedness of deterministic queuing networks with feedback control
No full textWe study the well-posedness of a class of dynamical flow network systems describing the dynamical mass balance among a finite number of cells exchanging flow of traffic between themselves and with the external environment. Dynamical systems in the considered class are described as differential inclusions whereby the routing matrix is constant and the outflow from each cell in the network is limited by a control that is a Lipschitz continuous function of the state of the network. This framework finds application in particular within traffic signal control, whereby it is common that an empty queue can be allowed to have more outflow than vehicles in the queue. While models for this scenario have previously been presented for open-loop outflow controls, our result ensures the existence and uniqueness of solutions for the network flow dynamics in the case Lipschitz continuous feedback controllers
Lygephila dubatolovi Fibiger, Kononenko & Nilsson, new species
No full text<i>Lygephila dubatolovi</i> Fibiger, Kononenko & Nilsson, new species <p>(Figs. 1, 2, 4, 9, 12, 17, 22, 23)</p> <p> <b>Type material.</b> Holotype: male, RUSSIA: Primorye Territory, Arsenjev, 25.vii.1987, G. A. Grigoriev leg., in coll. Siberian Zoological Museum, Institute for Systematics and Ecology of Animals (Siberian Branch of Russian Academy of Sciences, Novosibirsk). Paratypes: 2 males, same locality and collector, 1 and 27.vii.1987, in coll. G. A. Grigoryev, St. Peterburg; 2 males, Primorye territory, Gornotaezhnoe, 18 km SE Ussuriisk, 8.viii.1995, V. Dubatolov leg., genit. prep. 5852 M. Fibiger, in coll. Siberian Zoological Museum, Institute for Systematics and Ecology of Animals; 2 females, same locality, 25–26.vii.2002, D. Nilsson & K. Larsen leg., one genit. prep. 5699 M. Fibiger, in colls. D. Nilsson and M. Fibiger (to be deposited at the Zoological Museum of Copenhagen University, Denmark). CHINA: 1 male, Prov. Liaoning, Jianchang, 14.viii.2007, H.L. Han leg., in coll. School of Forestry, Northeast Forestry University, Harbin.</p> <p> <b>Description.</b> Adult (Figs. 1, 2, 4). Wingspan: 44–47 mm. Antennae of male ciliate; those of female also ciliate, with shorter lamellae. Proboscis fully developed; eyes large, round; lower part of clypeofrons with deciduous scales; head above this area with long brown scales; coal-black scales between antennae and above on head and patagia; thorax and ground colour of forewing grey, suffused with brown scales, including fringes; all cross-lines present, well marked; postmedial area blackish brown; terminal line marked by small, black intervenal dots; reniform stigma dark brown, with four black spots; orbicular stigma absent. Hindwing blackish brown, with a narrow medial line, and a broad blackish subterminal band; fringes brown, outwards gradually whitish. Underside light brown, with medial lines and blackish postmedial bands on both wings; reniform stigma light brown, narrow, outlined by dark brown. <b>Male genitalia</b> (Figs. 9, 12). Uncus relatively short, much shorter compared to <i>L. ludicra</i> (Figs. 11, 14) and <i>L. maxima</i> (Figs. 10, 13); distal part of uncus subapically high; tegumen long, three times longer then vinculum; saccus short, apically broad, V-shaped; juxta anchor-shaped; valva narrow, much narrower than in <i>L. maxima</i> and <i>L. ludicra</i>; harpe finger-like, parallel with valva margins, placed distally; phallus long and narrow; vesica with multiple small diverticula, a few of them long and broad. <b>Female genitalia</b> (Fig. 17). Ovipositor lobes broadly triangular, setose; apophyses equally long and narrow, stick-like; ostium wide; antrum long, V-shaped, longer than in <i>L. ludicra</i> (Fig. 19), but shorter than in <i>L. maxima</i>, heavily sclerotised; ductus bursae short, cylindrical; corpus bursae pear-shaped, relatively larger than in <i>L. maxima</i> (Fig. 18).</p> <p> <b>Biology.</b> <i>L. dubatolovi</i> occurs in rich broadleaved forests with open grass meadows (Fig. 22); all specimens were collected by UV light from late July to the beginning of August. The early stages are unknown.</p> <p> <b>Distribution</b> (Fig. 23). The species is known from two localities from the Primorye Territory of Russian Far East, and from Liaoning Province in North China.</p> <p> <b>Etymology.</b> Name for the Russian lepidopterist, Vladimir Viktorovich Dubatolov (Senior Researcher, Institute for Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk; curator of Lepidoptera, Siberian Zoological Museum).</p> <p> <b>Notes.</b> <i>L. dubatolovi</i> is distinguished by a medial shadow, which is fused below the reniform, and is separated from that point into two gradually widening bands to the ventral margin; the costal patch of the postmedial area is narrow; the postmedial line is present though blurred; and the hindwing has a medial line, present at both wings on the underside. In the male genitalia, the uncus is relatively short; the distal part of the uncus is subapically high; the valva is narrow; and the vesica has a long and broad diverticulum. In the female genitalia the ostium is wide and corpus bursae pear-shaped. <i>L. dubatolovi</i> is smaller than <i>Lygephila maxima</i> (Figs. 3, 5, 10, 13, 18) and larger than <i>L. ludicra</i> (Figs. 6, 11, 14, 19). <i>L. dubatolovi</i> also differs from these other two <i>Lygephila</i> as follows: the two bands of the medial shade are not parallel; the postmedial line is blurred; a medial line is present on the hindwing; a shorter and wider uncus, and much narrower valva; a wider ostium bursae; a pear-shaped corpus bursae; and an antrum shorter than <i>L. maxima</i>, and longer <i>L. ludicra</i>.</p>Published as part of <i>Fibiger, Michael, Kononenko, Vladimir S. & Nilsson, Danny, 2008, Description of a new species of Lygephila Billberg, 1820 (Lepidoptera: Noctuidae, Catocalinae) from Russian Far East and North China, pp. 62-68 in Zootaxa 1922</i> on pages 62-65, DOI: <a href="http://zenodo.org/record/184735">10.5281/zenodo.184735</a>
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