1,720,992 research outputs found
Figures 13–17 in Comparative morphological study of reproductive system between Tipulidae and Limoniidae (Diptera: Tipuloidea)
No full textFigures 13–17. Hexatoma (Eriocera) cleopatroides. 13. Ovipositor and female internal reproductive system, lateral view. 14. Cercus and vaginal apodeme, dorsal view. 15. Hypovalva, dorsal view. 16. Female internal reproductive system, dorsal view. 17. Egg.Published as part of Men, Qiulei, Sun, Mengwei & Starkevich, Pavel, 2018, Comparative morphological study of reproductive system between Tipulidae and Limoniidae (Diptera: Tipuloidea), pp. 89-102 in Zoological Systematics 43 (1) on page 95, DOI: 10.11865/zs.201808, http://zenodo.org/record/536396
Figures 18–22 in Comparative morphological study of reproductive system between Tipulidae and Limoniidae (Diptera: Tipuloidea)
No full textFigures 18–22. Holorusia sp. 18. Ovipositor and female internal reproductive system, lateral view. 19. Hypovalva and vaginal apodeme, dorsal view. 20. Cercus, ventral view. 21. Female internal reproductive system, dorsal view. 22. Egg.Published as part of Men, Qiulei, Sun, Mengwei & Starkevich, Pavel, 2018, Comparative morphological study of reproductive system between Tipulidae and Limoniidae (Diptera: Tipuloidea), pp. 89-102 in Zoological Systematics 43 (1) on page 96, DOI: 10.11865/zs.201808, http://zenodo.org/record/536396
DBSCAN-based particle Gaussian mixture filters
No full textThis study addresses nonlinear and non-Gaussian state estimation problems where the particle filter (PF) exhibits the impoverishment issue. This issue arises from the discretisation of the continuous posterior distribution of the state and the use of importance sampling, where the true distribution of the state is unknown. In this study, we propose density-based spatial clustering of applications with noise (DBSCAN)-based particle Gaussian mixture (PGM) filters: the PGM-DS and PGM-DU filters, where DS indicates the PGM filter with D B S CAN and DU indicates the PGM filter with D BSCAN and the unscented transform ( U T). These filters assume the posterior distribution of the state to be a Gaussian mixture model (GMM) and sample particles from this GMM. At every time step, the particles are clustered into multiple Gaussian components using DBSCAN, the components are updated with the Kalman/linear minimum mean squared error (LMMSE) update, and the GMM is reconstructed with the updated means and covariances. The proposed filters are tested in three numerical simulation scenarios and compared with other state-of-the-art nonlinear filters. The results show enhanced performance and robustness across the tested simulation scenarios, with lower computational cost compared to the other filters.This research was supported by the Inha University funded project Precision Guidance and Navigation for Deep Space Exploration (project number P20962).Digital Signal Processin
Libnotes (Libnotes) pseudonohirai Men 2015
No full text3.1 Libnotes (Libnotes) pseudonohirai 3.1. 1 Male reproductive system Hypopygium. Ninth tergite rounded at caudal margin in dorsal view (Fig. 1). Gonocoxite thin in dorsal view but broad in lateral view (Figs 1, 3), slightly longer than inner gonostylus, with finger-shaped ventromesal lobe broad and elongate, almost reaching end of aedeagus (Figs 1–3). Inner gonostylus with two parts in lateral view, the ventral part triangular, and the dorsal part bifurcated forming two prominences, the upper prominence long with a wisp of long setae at apex, the lower prominence short, densely covered with strong setae (Fig. 3). Outer gonostylus hook-shaped, curved at end, expanded at basal one-third (Figs 1–3). Paramere leaf-shaped with a median ridge, straight at inner margins (Fig. 4). Aedeagus relatively thick, bifid at apex (Fig. 4). Internal reproductive system. Consisting of a pair of accessory glands generating from the distal end of ejaculatory duct, a pair of seminal vesicles, a pair of vasa deferentia linking to paired testes (Fig. 5). Ejaculatory duct relatively short, flexible, basally slender and gradually thick to apical end. Seminal vesicle paired, relatively thick and expanded, leading to the proximal end of vas deferens, running posterior to a narrowed duct which arising from the apex of ejaculatory duct. Accessory glands being a pair of tubular purses, simple, expanded medially, arising from base of seminal vesicle, subequal to seminal vesicle in length. Vas deferens flexible, tough, slightly shorter than seminal vesicle. Testis, an elliptical structure with grided surface, arising from the termination of vas deferens (Fig. 5).Published as part of Men, Qiulei, Sun, Mengwei & Starkevich, Pavel, 2018, Comparative morphological study of reproductive system between Tipulidae and Limoniidae (Diptera: Tipuloidea), pp. 89-102 in Zoological Systematics 43 (1) on page 91, DOI: 10.11865/zs.201808, http://zenodo.org/record/536396
Nephrotoma martynovi Alexander 1935
No full text<i>Nephrotoma martynovi</i> Alexander, 1935 (Figs 44–52) <p> <i>Nephrotoma martynovi</i> Alexander, 1935c: 234 (original description); Liu <i>et al</i>., 2009: 41 (redescription).</p> <p>Redescription. Hypopygium relatively massive, tergite ninth and sternite ninth separated totally (Fig. 44). Tergite ninth with a pair of lateral horns slender and glabrous; intermediate lobes having many black teeth, its apex further terminating into an acute point (Fig. 45). Sternite ninth split medially on lateral surface, shallowly emarginated on posterior border (Figs 44, 46). Outer gonostylus lanceolate, widened medially, rounded at apex (Fig. 47). Inner gonostylus with apical beak elongated, slightly rounded at tip, basal beak obtuse, its inner surface with a long triangular plate; posterolateral part rounded and obtused, with many long setae on its upper margin; dorsal crest absent (Fig. 48). Sternite eighth with caudal margin entire, or slightly emarginated, without lobe, densely covered with long setae but not modified into brushes (Figs 44, 46). Aedeagal guide obtuse apically, gonapophyses elongated, flattened, appearing as duck’s head, ventral appendage of aedeagal guide longer than gonapophyses, straight, oblique and acute at apex (Fig. 49). Semen pump with ejaculatory apodeme massive, elongated apically and protruding anteriorly, ejaculatory apodeme divided by a V-shaped notch (Fig. 50). Anterior immovable apodeme curved dorsally (Fig. 51). Posterior immovable apodeme short, slightly acute to apex (Fig. 51). Aedeagus truncated apically, with a hork at apical one third, and a long plate in middle region (Fig. 52).</p> <p>Material examined. 2♂, China, Heilongjiang, Baoquanling, 2.V.2019, leg. Yixin Huang.</p> <p>Distribution. China (Hebei, Heilongjiang, Inner Mongolia), Russia, Mongolia, North Korea.</p> <p> Remarks. The species is closely allied to <i>N. subpallida</i> Alexander, 1925 from Japan, but differs from the latter by the intermediate lobe of tergite ninth strongly protruded (slightly protruded in <i>N. subpallida</i>), and the dorsal crest of inner gonostylus absent (present in <i>N. subpallida</i>).</p>Published as part of <i>Men, Qiulei, Yu, Dong & Sun, Mengwei, 2023, Description of a new species in the genus Nephrotoma (Diptera: Tipuloidea: Tipulidae) from China, with redescriptions of hypopygiums of six species, pp. 249-263 in Zoological Systematics 48 (3)</i> on page 257, DOI: 10.11865/zs.2023304, <a href="http://zenodo.org/record/10941824">http://zenodo.org/record/10941824</a>
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
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