1,721,036 research outputs found
Hybrid active and passive control of vibratory power flow in flexible isolation system
Full text linkA hybrid active and passive vibration control strategy is developed to reduce the total power flows from machines, subject to multiple excitations, to supporting flexible structures. The dynamic interactions between machines, controllers, and receiving structures are studied. A force feedback control process governed by a proportional control law is adopted to produce active control forces to cancel the transmitted forces in the mounts. Computational simulations of a simple and a multiple dimensional hybrid vibration isolation system are performed to study the force transmissibility and the total power flows from vibration sources through active and passive isolators to the supporting structures. The investigation focuses on the effects of a hybrid control approach to the reduction of power flow transmissions and the influence of the dynamic characteristics of the control on power flow spectra. The hybrid control mechanism is synthesised from the power flow analysis. Conclusions and control strategies, well supported by numerical simulations, are deduced providing very useful guidelines for hybrid vibration isolation design
Gibberifera glaciata
No full textGibberifera glaciata (Meyrick, 1907) Cydia glaciata Meyrick, 1907: 143. TL: India, Assam, Khasi Hills; TD: NHMUK. Eucosma glaciata: Clarke, 1958: 364. Gibberifera simplana glaciata: Diakonoff, 1964: 24. Gibberifera glaciata: Kawabe & Nasu, 1994: 85; Razowski, 1999: 448; Kuznetzov, 2001, in: Ler (ed.): 347; Liu & Li, 2002: 320. Gibberifera simplana: Kawabe & Sakurai, 1988: 110; Kawabe, 1989: 54; Kawabe, Komai & Razowski, 1992: 107. [Misidentification] Specimens examined. 1♂, 3♀, Lijiang, Yunnan Province, alt. 2650 m, 17 July 2001, leg. Li H.H. & Wang X.P.; 1♀, Weishan County, Yunnan Province, alt. 2200 m, 20 July 2001, leg. Li H.H. & Wang X.P.; 2♂, Sangzhi County, Hunan Province, alt. 1250 m, 13 August 2001, leg. Li H.H. & Wang X.P.; 1♂, 1♀, Zhangjiajie, Hunan Province, alt. 650 m, 7 August 2001, leg. Li H.H. & Wang X.P.; 5♂, 2♀, Bomi County, Xizang Autonomous Region, alt. 2800 m, 19 August 2003, leg. Wang X.P. & Xue H.J.; 1♂, 1♀, Neixiang County, Henan Province, alt. 1350 m, 14 July 1998, leg. Li H.H.; 1♂, 1♀, Songxian, Henan Province, alt. 1580 m, 19–25 July 2002, leg. Wang X.P.; 6♂, 1♀, Yadong County, Xizang Autonomous Region, alt. 2950 m, 26–28 August 2003, leg. Wang X.P. & Xue H.J.; 16♂, 6♀, Linzhi County, Xizang Autonomous Region, 22 June–31 July 1983, leg. Li H.H.; 8♂, 3♀, Linzhi County, Xizang Autonomous Region, alt. 2900 m, 6 August 2003, leg. Wang X.P. & Xue H.J.; 4♂, 1♀, Mt. Fanjing, Guizhou Province, alt. 1300 m, 2–3 July 2001, leg. Li H.H.; 1♂, Baozigou (32.91 ºN, 104.16 ºE), Wanglang National Nature Reserve, Sichuan Province, alt. 2369 m, 19 July 2017, leg. Qi M.J. & Yang X.F. Host plants. Salix spp. (Salicaceae). Distribution. China (Henan, Hunan, Sichuan, Guizhou, Yunnan, Xizang, Taiwan), Thailand, India, Nepal, Pakistan. Remarks. This species was considered as a subspecies of G. simplana (Fischer von Röslerstamm) by Diakonoff (1964) based on the similarity of wing pattern and genitalia. Kawabe & Nasu (1994) upgraded it to species level based on the presence of a bifurcated uncus and a non-deciduous cornutus. Subsequently it has always been regarded as an independent species of Gibberifera (Liu & Li, 2002; Zhang & Li, 2004; Gilligan et al., 2018). The male genitalia of this species is characteristic by having the uncus shallowly or deeply bifurcated and the vesica with one or two non-deciduous cornuti.Published as part of Zhang, Aihuan, 2021, Review of Gibberifera Obraztsov (Lepidoptera: Tortricidae) from China, with description of a new species, pp. 409-416 in Zootaxa 5039 (3) on pages 412-413, DOI: 10.11646/zootaxa.5039.3.5, http://zenodo.org/record/551149
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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