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Paraleptostylis vityazi Vassilenko & Tzareva, 2004, sp. nov.
No full text<i>Paraleptostylis vityazi</i> sp. nov. <p>(FIGS. 3–4)</p> <p> <i>Material examined:</i> Holotype is a female 5.5 mm length with rudimentary oostegites, kept</p> <p>in the collection of Zoological Institute, (ZIN ­ 1/88370), R/V “Vityaz”, 52nd cruise, sta. 6649; 7.06.1972, Sea of Japan, 42º37´8´´N, 134º18´5´´E, depth 1130 m, substrate: pelitic silt, “SIGSBY” trawl.</p> <p> <i>Paratypes</i>: (ZIN ­ 2/88371) 1 female 6.4 mm length with rudimentary oostegites, same locality; (ZIN ­ 3/88372) 3 females 4.7–5.0 mm length with eggs, 3 females 4.3–5.1 mm length with rudimentary oostegites, 1 mature male with pleon torn away (peduncle of antenna I is reinforced, antenna II are elongated), 4 males of 4–4.5 mm length and 4 juveniles of 3.3–4.0 mm length – R/V “Vityaz”, 52nd cruise, sta. 6667; 21.06.1972, Sea of Japan, 37º43´7´´N, 136º20´2´´E, depth 209 m, substrate: watery silt of brown color.</p> <p> <i>Diagnosis:</i> Carapace bulging widened in middle part, rather sharply narrowing anteriorly. Pseudorosrum long and sharp. Pereopod I very long, protruding beyond carapace edge by 2/3 of its length; basis of pereopod I comparatively short and curved, length equal to that of carpus; propodus longest, considerably exceeding carpus length, dactylus short, three times shorter than propodus. Pereopod II significantly shorter than pereopod I, carpus noticeably exceeding length of propodus, dactylus longest and slightly shorter than two preceding ones together. Uropodal peduncle 2.3 times longer than telson.</p> <p> <i>Description of the holotype:</i> Female. Body (Fig. 3, A) weakly calciferous, tegument semitransparent. Carapace surface is smooth. Carapace bulging on each side, elongated, length slightly bigger than width, widened in middle, rather sharply narrowing anteriorly; pseudorostrum long and sharp. Antero­lateral angles not produced, lower edge of carapace dentate, denticles having a form of rectangular lugs with rounded corners.</p> <p>Abdomen without telson slightly shorter than cephalothorax; postero­lateral angles of I–V abdominal segments well produced. Fifth abdominal segment longest; length slightly shorter than that of two preceding abdominal segments together.</p> <p>Telson (Fig. 3, D) shorter than last abdominal segment; sharply narrowing in distal part, pre­anal and post­anal parts approximately similar in length. Telson bearing three spines on each lateral side of its narrowed part, and on the end – two long spines and a very little one.</p> <p>Basis of maxilliped III (Fig. 4, E) slender, highly curved, length exceeding that of other five articles combined; outer distal edge of the basal article bearing three long plumose setae.</p> <p>Pereopod I (Fig. 4, A) very long, protruding beyond carapace edge by 2/3 of its length, considerably longer than other pereopods; its carpus and propodus unusually thin and long. Basis of pereopod I comparatively short and curved, length equal to that of carpus, noticeably shorter than propodus; propodus longest, considerably exceeding carpus length, dactylus short, three times shorter than propodus, and slightly narrowing to the distal end.</p> <p>Pereopod II (Fig. 4, C) significantly shorter than pereopod I, carpus noticeably exceeding length of propodus, and bearing one long stout setae and two thin setae on outer distal corner; dactylus longest and slightly shorter than two preceding ones together, bearing several thin long setae on each side, and two terminal setae, one of which is very long.</p> <p>Pereopods III and IV (Fig. 4, D, B) shortened, baculiform, and similar in construction with small rudimentary double­articled exopodite.</p> <p>Pereopods V without exopodite.</p> <p>Uropods (Fig. 3, D) long, almost equal to length of last three abdominal segments and telson length combined; uropodal peduncle 2 times longer than VI abdominal segment, bearing 12–13 spines along inner edge; uropodal branches long, they longer than a half length of peduncle; outer branch slightly shorter than inner one, consisting of two articles: short basal and very long distal, which bears two long and two relatively short apical setae; inner branch consisting of three articles: basal article longer than articles 2 and 3 combined, terminal article bearing two long and one short setae.</p> <p>Male. Males without pleopods. Mature male with flat carapace (Fig. 3, B) bearing one dentate lateral ridge on each side, denticles on ridges have form of small rectangular lugs, same ridges developed on carapace back: beginning from pseudorostrum and fringe lobe area, spreading backwards up to middle of carapace; antenna I (Fig. 3, C) biramous, with reinforced articles of the peduncle, with thick bunch of hairs on last article of peduncle, main flagellum consist of five articles, additional flagellum – of three articles with thin terminal setae; antenna II elongate, exceeding carapace length; exopodites normally developed on pereopods I–IV. In young males lateral and spinal ridges not developed; antenna I biramous, with reinforced peduncle articles, but without thick bunch of thin hairs on terminal article of peduncle, but with several thin hairs: main flagellum with five articles, and accessory flagella with three articles; telson length considerably greater than that of VI abdominal segment.</p> <p> <i>Remarks.</i> This new species <i>Paraleptostylis vityazi</i> certainly belongs to the <i>Paraleptostylis</i> genus (Vassilenko, 1990). The new species is close to <i>Paraleptostylis arctica</i> (Vassilenko, 1990), but differs from it by the larger sizes of females (up to 6.4 mm), by longer pereopods I and II, uropods, by a different ratios of articles length of pereopods I and II; and by a different ratios of the length of uropods and telson.</p>Published as part of <i>Vassilenko, Stella & Tzareva, Ludmila, 2004, New Cumacea species (Malacostraca, Peracarida) from the deepwater area of the Sea of Japan (Collections of the 52 Cruise by the R / V « Vityaz », 1972), pp. 1-16 in Zootaxa 702</i> on pages 6-9, DOI: <a href="http://zenodo.org/record/158429">10.5281/zenodo.158429</a>
Bodotria furugelmiensis Tzareva & Vassilenko 2006, sp. nov.
No full textBodotria furugelmiensis sp. nov. (Figs. 3, 4) Material examined Holotype, ZIN1/88380, female 6.0 mm, with empty marsupium, Sea of Japan, Peter the Great Bay, near Furugelm Island, 31 Jul 1998, 16 m, dredge. Paratype: ZIN1/88381, 1 female 5.7 mm, Sea of Japan, Peter the Great Bay, near Large Pelis Island, 7 Aug 1986, 20 m, from silted sand, qualitative collection. Diagnosis Integument well calcified. Carapace sculpture reticulate, with numerous pits. Carapace, thoracic and abdominal somites with middorsal carina. Carapace 2.8 times longer than first thoracic somite. Basis of first pereopod 4 times longer than carpus. E ndopod of uropod 1segmented, with six spinous setae on inner edge; and one large, thick spinous seta dorsally. Description Holotype (Fig. 3A). Integument well calcified. Carapace (Fig. 3C) sculpture reticulate, each “cell” of reticulation with pit. In dorsal view, carapace elongated, subrectangular. Carapace shorter than onethird of total body length. Carapace, thoracic and abdominal somites with middorsal carina. Middorsal carina well developed on carapace, thoracic somites, first five abdominal somites, and on anterior half of sixth abdominal somite. Lateral surface with two welldeveloped carinae running from anterior edge of carapace to end of thoracic somites and onto first abdominal somite. Pseudorostrum short and truncated. Antennal notch angularly concave, with subacute anterolateral angle. Maxilliped III (Fig. 3B) with weakly curved basis, propodus and dactylus equal length. Pereopod I (Fig. 4A) slender, basis elongated and four times longer than carpus; carpus widened with several setae along lower edge. Pereopod II (Fig. 4B) 6segmented, almost half length of pereopod I; dactylus with three spinous dorsal setae and one small seta in middle of outer edge; carpus with two spinous setae on outer distal corner. Pereopod III (Fig. 4C) with elongated basis, five times longer than carpus; carpus and merus of equal length. Uropod (Fig. 4D) more than twice as long as last abdominal somite; uropodal peduncle 1.5 times longer than last abdominal somite; exopod slightly longer than endopod, with two slender distal setae (long and short ones), and several slender setae along inner edge; endopod 1segmented, with six spinous setae on inner edge; and one large thick spinous seta dorsally. Males are not known. Etymology The new species is named for the Island near where the species was found—Furugelm Island, which is a part of the FarEastern State Marine Biosphere Reserve. Remarks The new species, Bodotria furugelmiensis, is very close to B. carinata Gamo, 1964, from Sagami Bay.Published as part of Tzareva, Ludmila & Vassilenko, Stella, 2006, Two new species of Cumacea (Malacostraca, Peracarida) from Peter The Great Bay (Sea of Japan), pp. 41-48 in Zootaxa 1174 on pages 45-46, DOI: 10.5281/zenodo.264580
Eudorella bathyalis Vassilenko & Tzareva, 2004, sp. nov.
No full text<i>Eudorella bathyalis</i> sp. nov. <p>(Figs. 5–6)</p> <p> <i>Material examined:</i> holotype: adult female with an empty marsupium, the length is 6.4 mm, kept in the collection of Zoological Institute, (ZIN ­ 1/88373), R/V “Vityaz”, 52nd cruise, sta. 6650, 08.06.1972; Sea of Japan, 42º35´7´´N, 134º19´E, depth 1760 m, substrate: liquid mud, “SIGSBY” trawl.</p> <p>Paratypes: (ZIN ­ 2/88374), 2 females (6.3, 6.8 mm length) with an empty marsupium; 3 females (5.0–6.0 mm length) with rudimentary oostegites; 2 males (6.0– 6.5 mm length) with developed pleopods; 4 males (4.5–5.0 mm length) with rudimentary pleopods; 3 juveniles (2.5–4.0 mm length) — same locality, by “SIGSBY” trawl, (ZIN ­ 3/88375), 1 female (6.3 mm length) with an empty marsupium — same locality, depth 1840 m, substrate: thick gray clay, bottom sampling grab “Okean”.</p> <p> <i>Diagnosis:</i> Body slender, smooth without hairs. Sub­rostral notch of complicated shape – with two grooves, upper groove dorsally limited to projection with three denticles, directed forward; this groove separated from lower groove by weakly projected protrusion with three denticles, directed downwards; sub­rostral spine is strong and sharp, dentate on adjoining lower part of carapace.</p> <p> <i>Description of the holotype:</i> Female. (Fig. 5, A). Slender, elongated, smooth body without hairs. Carapace surface sculpture reticulates. Sub­rostral notch of complicated shape — with two grooves: upper groove deeper than lower one; dorsally limited to projection with three denticles, anteriorly directed; grooves separated by weakly projected protrusion with three denticles, directed downwards; sub­rostral spine is strong and sharp, curved downwards and forwards, dentate on adjoining lower part of carapace (Fig. 5, D).</p> <p>Antenna I (Fig. 5, C). Length of terminal peduncle article of antenna I considerably smaller than that of main flagellum. Accessory flagellum shorter than the article 1 of main flagellum.</p> <p>Basis of maxilliped III (Fig. 6, A) curved and slightly longer than other five articles combined together, its distal outer angle bearing two long plumose setae, merus bearing one long plumose setae on outer distal angle, length of carpus­dactylus gradually decreasing from carpus five to dactylus, peak of dactylus wide and bearing several setae.</p> <p>Pereopod I (Fig. 6, B) protruding beyond carapace edge almost by length of last three articles; basal article bearing several big plumose setae, length slightly exceeding length of ischium­carpus combined, propodus considerably exceeding carpus one in length and more than twice dactylus.</p> <p>Pereopod II (Fig. 5, B) with rather wide articles, basal article fused with ischium, carpus considerably exceeds length of merus and almost equal to length of propodus and dactylus combined; dactylus not widened, narrower than carpus, distal part bearing several strong distal setae, forming.</p> <p>Uropodal length (Fig. 6, C) considerably exceeding length of last abdominal segment; uropodal peduncle similar in length to exopodite; exopodite shorter than endopodite; terminal article of endopodite short, and less than 1/3 length of article 1, distal end is obtuse, bearing two long setae.</p> <p>Male immature, similar in appearance to female. Anterior edge of lobes on pseudorostrum of different construction in comparison with that of a female. Antero­lower edge of lobes on pseudorostrum almost vertical, bearing nine denticles (Fig. 5, E). Antenna II elongated.</p> <p> <i>Remarks.</i> Some females from paratypes bear four denticles on the upper protrusion of sub­rostral notch; up to five denticles can be developed on the protrusion between grooves. Females with rudimentary oostegites have weakly developed dents on the sub­rostral notch protrusions (Fig. 5, F).</p> <p> By the form of sub­rostral notch <i>Eudorella bathyalis</i> is slightly similar to <i>Eudorella hispida Sars, 1871,</i> but sub­rostral projection of bearing another number of denticle than E. hispida, the new species body is not covered with hairs, and its uropods also have a different structure.</p>Published as part of <i>Vassilenko, Stella & Tzareva, Ludmila, 2004, New Cumacea species (Malacostraca, Peracarida) from the deepwater area of the Sea of Japan (Collections of the 52 Cruise by the R / V « Vityaz », 1972), pp. 1-16 in Zootaxa 702</i> on pages 9-13, DOI: <a href="http://zenodo.org/record/158429">10.5281/zenodo.158429</a>
Diastylis moskalevi Vassilenko & Tzareva, 2004, sp. nov.
No full text<i>Diastylis moskalevi</i> sp. nov. <p>(Figs. 1–2)</p> <p> <i>Material examined:</i> holotype, female of 16 mm length (with telson) with eggs, eggs diameter is 0.6 mm, kept in the collection of Zoological Institute, (ZIN ­ 1/88366), R/V “Vityaz”, 52 cruise, sta. 6671; 23.06.1972, Pacific Ocean, 40º19´N, 143º35´4´´E, depth 2400–2720 m; “SIGSBI <i>”</i> trawl, washed, only large ground fractions were left.</p> <p>Paratypes: (ZIN ­ 2/88367) 1 female, 20 mm length, with an empty marsupium; 1 female 19 mm length with, 2 females 15 mm and 15.5.mm length with oostegite rudiments; 2 females with eggs and abdomen torn away, same locality; (ZIN ­ 3/88368) 1 female 14 mm length with eggs; 1 male 9 mm long with 2 pairs of pleopods; R/V “Vityaz”, 52nd cruise, sta. 6666, 20.06.1972, Sea of Japan, 37º52´3´´N, 136º20´E, depth 513– 365 m; substrate: large silted aleurite, “SIGSBY” trawl; (ZIN ­ 4/88369) 1 male 8.5 mm long with developed pleopods and long antenna II; R/V “Vityaz”, 52nd cruise, sta. 6659, 16.06.1972, Sea of Japan, 40º14´5´´N, 134º42´8´´E, depth 1340–1610 m; substrate: washed trawl, many large foraminiferans were collected, “SIGSBY” trawl.</p> <p> <i>Diagnosis:</i> Carapace swollen, covered with very fine denticles, lower lateral borders of carapace with groove. Pseudorostrum short, not pointed. Postero­lateral angles of last thoracic segment slightly elongated and round­shaped. Pre­anal part of telson almost equal to that post­anal part; post­anal part of telson gradually narrowing, bearing eight­nine lateral and two apical spines. Peduncle length of uropods equal to telson length; endopodite slightly longer exopodite.</p> <p> <i>Description of the holotype:</i> Female (Figs. 1, A, D, E). Carapace swollen, widely oval without folds. Carapace surface sculpture very typical for the species: entire carapace densely and almost evenly covered with very fine denticles and sparse thin setae. In dorsal view, carapace length slightly exceeds width, lateral sides parallel and slightly rounded, beginning from middle smoothly narrowing to end of pseudorostrum. Pseudorostrum relatively short, not pointed. Two rounded cavities in anterior part of carapace, triangular impression with sharp elongated forward peak, in posterior part of carapace, which passes into lengthwise crevice. Lower lateral borders of carapace finely serrate. Antero­lateral angles not pronounced.</p> <p>First and second thoracic segments finely serrate along anterior edge, almost fringed. Postero­lateral angles of last thoracic segment slightly elongated backwards, roundshaped, with small denticle.</p> <p>Abdomen section (without telson) shorter than thoracic one. Postero­lateral angles of abdominal segments I­V produced; every abdominal segment with oblique edge on lateral side.</p> <p>Pereopod I (Fig. 1, C) long, thin, considerably longer than other pereopods, basis thin and slightly shorter than total length of ischium­propodus, plumose setae along entire lower edge; ischium and merus short and approximately equal in length; three distal articles, very thin and elongated; carpus and propodus equal in length; dactyl slightly thinner and shorter than propodus one.</p> <p>Pereopod II (Fig. 2, D) considerably shorter than pereopod I, basis slightly reinforced, covered with rounded plates; carpus long, almost twice longer than two final articles combined.</p> <p>Pereopods III­V (Fig. 2, A, B, C) shorter than pereopod II and have a similar structure, gradually diminishing from III to V pair, basis very long and thin; propodus of pereopod III and pereopod IV with long stout terminal setae.</p> <p>Telson (Fig. 2, E) three times longer than last abdominal segment, length of post­anal part of telson almost equal to that of pre­anal part, pre­anal part of telson with parallel lateral sides, post­anal part of telson gradually narrowing, bearing eight­nine lateral spines and two apical spines.</p> <p>Uropods (Fig. 2, E) thin and long, peduncle length equal to telson length, inner and outer sides of peduncle bearing nine­ten setae; endopod slightly longer than its exopod, it consisting of three articles, inner side of articles bearing spine­like setae with terminal hair; exopod double­articled. Proximal articles of exopodite and endopodite almost equal in length; terminal article of exopodite bearing two long terminal setae, terminal article of endopod bearing one long and one short setae.</p> <p>Male. (Fig. 1, B). Carapace narrower in comparison with female; pseudorostrum longer and more pointed, carapace surface sculpture covered with small denticles, posterolateral angles of abdominal segments ending with small spines. Post­anal part of telson shorter than pre­anal.</p> <p> <i>Remarks:</i> When comparing paratypes of the new species with holotype some distinctions can be observed: postero­lateral angles of abdominal segments of smaller individuals (females with oostegite rudiments) are pointed or bear spines. Post­anal part of telson is shorter than pre­anal one. <i>D. moskalevi</i> resembles in appearance <i>D. hirsuta</i> (Lomakina, 1955). When describing <i>D. moskalevi</i>, n. sp. we reviewed collection materials of ZIN RAS on <i>D. hirsuta.</i> Since these species are similar in appearance, it is necessary to pay attention to the following distinctive features of the new species:</p> <p> 1. The most characteristic distinctive feature is carapace surface structure: carapace of <i>D. moskalevi</i> is covered with multiple small ripples, whereas carapace surface of <i>D. hirsuta</i> is fine­grained.</p> <p> 2. Females and males of the new species are considerably bigger (females have 15–20 mm length, males – 9 mm) than that of <i>D. hirsuta</i> (females 9–13 mm, males are unknown).</p> <p> <i>3. D. moskalevi</i> pseudorostrum is shorter than that of <i>D. hirsuta. 4. D. moskalevi</i> has a groove along the lower edge of carapace, whereas <i>D. hirsuta</i> has not it.</p>Published as part of <i>Vassilenko, Stella & Tzareva, Ludmila, 2004, New Cumacea species (Malacostraca, Peracarida) from the deepwater area of the Sea of Japan (Collections of the 52 Cruise by the R / V « Vityaz », 1972), pp. 1-16 in Zootaxa 702</i> on pages 2-6, DOI: <a href="http://zenodo.org/record/158429">10.5281/zenodo.158429</a>
FIGURE 4 in New Cumacea species (Malacostraca, Peracarida) from the deepwater area of the Sea of Japan (Collections of the 52 Cruise by the R / V « Vityaz », 1972)
No full textFIGURE 4. Paraleptostylis vityazi sp. nov. A — pereopod I; B — pereopod IV; C — pereopod II; D — pereopod III; E — maxilliped III.Published as part of Vassilenko, Stella & Tzareva, Ludmila, 2004, New Cumacea species (Malacostraca, Peracarida) from the deepwater area of the Sea of Japan (Collections of the 52 Cruise by the R / V « Vityaz », 1972), pp. 1-16 in Zootaxa 702 on page 8, DOI: 10.5281/zenodo.15842
FIGURE 4 in Two new species of Cumacea (Malacostraca, Peracarida) from Peter The Great Bay (Sea of Japan)
No full textFIGURE 4. Bodotria furugelmiensis sp. nov., holotype female, 6.0 mm. ZIN1/88380. A, pereopod I; B, pereopod II; C, pereopod III; D, uropod and sixth abdominal segment. Scale: A, B, D = 0.2 mm; C = 0.1 mm.Published as part of Tzareva, Ludmila & Vassilenko, Stella, 2006, Two new species of Cumacea (Malacostraca, Peracarida) from Peter The Great Bay (Sea of Japan), pp. 41-48 in Zootaxa 1174 on page 47, DOI: 10.5281/zenodo.264580
Deteriorating renal function and clinical outcomes in HIV-positive persons
No full textObjectives: To determine the relationship between measures of renal function [current estimated glomerular filtration rate (eGFR) and proportion of follow-up with a low eGFR (%FU <= 60 ml/min)] and fatal/ nonfatal AIDS, non-AIDS events and all-cause mortality. Design: An observational, longitudinal cohort study of 12 155 persons from EuroSIDA. Methods: Persons with at least one eGFR measurement after 1 January 2004, using the CKD-EPI formula, were included. Poisson regression analyses were used to determine whether current eGFR or %FU of 60 ml/min or less were independent prognostic markers for clinical events. Results: During 61 425 person-years of follow-up (PYFU), the crude incidence of deaths was 11.1/1000 PYFU [95% confidence interval (CI) 10.0-12.1] at current eGFR more than 90 ml/min and 199.6 (95% CI 1144.3-254.3/1000 PYFU) when current eGFR was 30 ml/min or less. Corresponding figures for AIDS were 12.2 (11.1-13.3) and 63.9 (36.5-103.7) and for non-AIDS were 16.0 (14.8-17.3) and 203.6 (147.7-259.5). After adjustment, current eGFR of 30 ml/min or less was a strong predictor of death [adjusted incidence rate ratios (aIRR) 4.35; 95% CI 3.20-5.91] and non-AIDS events (3.63; 95% CI 2.57-5.13), although the relationship with AIDS was less strong (1.45; 95% CI 1.01-2.08). After adjustment, %FU of 60 ml/min or less was associated with a 22% increased incidence of death (aIRR 1.22 per 10% longer; 95% CI 1.18-1.27), a 13% increased incidence of non-AIDS events (95% CI 1.08-1.18) and a 15% increased incidence of AIDS events (95% CI 1.06-1.24). Conclusion: Both current eGFR and %FU of 60 ml/min or less were associated with death and non-AIDS events in HIV-positive persons. Our findings highlight the association between underlying renal dysfunction and morbidity and mortality in HIV infection, although reverse causality cannot be excluded
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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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