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Dematteis, Giuseppe

doi:10.1023/a:1006833200307

Cited by 21 publications

(8 citation statements)

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“…Those urban agglomerations (nodes) serve as the economic and social hinges and have a wide influencing domain (Liang 2009) in the urban cluster. Urban spatial clusters detected by our method show close resemblance to the regional network of cities delineated by Gu et al (2008) based on the strength of territorial relations, which are defined as the social and economic proximity relationship between neighboring cities (Dematteis 1997). For instance, the Shanghai urban system identified by Gu et al (2008) includes most of the cities in the detected urban spatial cluster (Table 8) except for City Guichi.…”

supporting

confidence: 67%

“…Rectangularity (REC) International Journal of Geographical Information Science 2335 administrative areas for the sake of convenience (Zhou 1991, Batten 1995, Dematteis 1997, Assuncao et al 2006, Chen et al 2006. The distance between the city centers was computed to quantify their spatial proximity in previous studies (Portnov et al 2004, Luo et al 2009, Terzi et al 2011.…”

Section: Attributes Definitionmentioning

confidence: 99%

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Object-based spatial cluster analysis of urban landscape pattern using nighttime light satellite images: a case study of China

Shu

Liu

et al. 2014

International Journal of Geographical Information Science

181

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supporting

confidence: 67%

Section: Attributes Definitionmentioning

confidence: 99%

Object-based spatial cluster analysis of urban landscape pattern using nighttime light satellite images: a case study of China

Shu

Liu

et al. 2014

International Journal of Geographical Information Science

181

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“…and one superficially Chrysolaena-like species of Lessingianthus (L. simplex Less.). Dematteis (1996) found a consistent base of x= 10, based on three species, for what is herein recognized as Chrysolaena.…”

Section: Distinguishing Features Of the Vernonieaesupporting

confidence: 57%

“…Some of these studies, and work of other recent authors, emphasized trichomes (Faust and Jones, 1973;Pope, 1983), underground systems (Menezes et al, 1979); anatomy (Magalhiies and Alencastro, 1973;Alencastro, 1978;Carlquist, 1964;Petriella, 1966), pollen (Stix, 1960;C.E. Smith, 1969;Kingham, 1976;Jones, 1979bJones, , 1981aJones, 1977b, 1979;Bolick, 1983;Isawumi et al, 1996), presence of latex (Lewinsohn,199 l), chromosome numbers (Jones, 1974(Jones, , 1979aKeeley, 1978;Dematteis, 1996), and nomenclatural details (Nicolson, 1991;Jeffrey and Hind, 1994;Grant, 1994). Jones (1977), Harborne and Williams (1977), and Robinson, Bohlmann, and King (1980) presented some early apparent correlations of chemical data with classification or geography, and the extensive subsequent studies of secondary metabolites were summarized by Bohlmann and Jakupovic (1990).…”

Section: Introductionmentioning

confidence: 99%

Generic and subtribal classification of American Vernonieae /

Robinson¹

1999

179

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A B S T R A C TRobinson, Harold. Generic and Subtribal Classification of American Vernonieae. Smithsoniun Contributions to Botany, number 89, 116 pages, 1999.-The Vernonieae in America is herein defined to exclude the Liabeae and Pseudostifftiu (Moquinieae), and to include elements sometimes placed in the Heliantheae (Trichospiru) or Lactuceae (Stokesiu). Pollen, style bases, raphids, inflorescence form, involucre, anther appendage, and chemistry are some characters used in the reclassification. Tables 1-12 indicate the distribution of these characteristics in most American genera. Vernoniu s.s., with type A pollen, is typified by K noveborucensis (L.) and occurs in the Bahamas, eastern North America, south to central Mexico and has two species in temperate South America. All other species previously placed in Vernoniu need to be removed from the genus, a process that is nearly complete for neotropical species. Most American Vernonieae seem to form a single related subgroup in the tribe. Subtribes included in the related subgroup are the Lychnophorinae (x = 15, 17, 18) and Centratherinae (x = 16) with type A pollen and hroheliangolides; Piptocarphinae (x= 17) with type A pollen, deciduous inner involucre, and sometimes opposite leaves; Vernoniinae (x = 17), many with glanduliferous anther appendages (including the Lepiduplou complex mostly with echinolophate pollen); and the newly proposed subtribes Sipolisiinae with type A pollen, armed receptacles, and carbonized achenes; Chrestinae with echinolophate pollen; and Leiboldiinae ( x = 19) with type A pollen, large heads, and a modified callus at the top of the achene. Of uncertain relationship to the preceding related subgroup are Stokesiu (x = 7), the Elephantopodinae (x = 1 1, 13), and the Rolandrinae (x = 8) with echinolophate pollen; three genera with type E pollen (Pucourinu, Acilepidopsis, and Mesunthophoru); and the Trichospirinae with type A pollen and flattened bicornute achenes. Ten subtribes are recognized, plus four unplaced generic groups. Three of the subtribal names, Leiboldiinae, Chrestinae, and Sipolisiinae are validated in the treatment. The genus Cuutingunthus of eastern Brazil, a possible relative of the Elephantopinae, is described as new. A list of the 76 accepted genera of Vernonieae, native or introduced in the New World, is provided, and a complete list of names of American Vernonieae is given with an indication of their present taxonomic dispositions and geographical distributions. Fifteen new combinations are provided.

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“…Megaregion has been defined as a functional polycentric network of metropolitan areas and their lower density surrounding areas [20,21], which is consistent with the network paradigm in urban systems [22,23]. A very important idea that this notion of 'megaregions' includes is an emphasis on transactional flows of people, goods, and services, which are considered at least as relevant as what happens within cities that determines cities' positions within urban systems [24,25]. Different cities within the megaregion network show a marked degree of spatial interaction and hence integration.…”

Section: Megaregions: the New Strategic Terrainmentioning

confidence: 98%

Development of Economic Integration in the Central Yangtze River Megaregion from the Perspective of Urban Network Evolution

2019

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Megaregions are the new engines of global and regional economic growth, and they often are considered a principal urbanization platform in China. To understand megaregional processes’ responses to China’s regional policies, this study focused on two aspects of integration development in the Central Yangtze River megaregion between 2000 and 2014: The internal collaborative networks using enterprises’ headquarters-branch locations as a proxy measurement and the role of regional transportation in the integration networks. Based on a three-step network analysis, the Central Yangtze River megaregion was increasingly similar to a polycentric urban system with Wuhan, Changsha, and Nanchang as the dominant service cities, and there were some indications of a preliminary urban network formation. However, integration development remained a government-led administrative process with administrative boundaries that significantly influenced the network structure. A panel regression analysis further suggested that transportation accessibility to the three central cities was the key determinant of network participation for the peripheral cities compared to economic performance. This work contributes to the debate on the hierarchical-administrative properties of China’s megaregions and transportation implications of the economic integration process.

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Cited by 21 publications

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Object-based spatial cluster analysis of urban landscape pattern using nighttime light satellite images: a case study of China

Object-based spatial cluster analysis of urban landscape pattern using nighttime light satellite images: a case study of China

Generic and subtribal classification of American Vernonieae /

Development of Economic Integration in the Central Yangtze River Megaregion from the Perspective of Urban Network Evolution

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