127,482 research outputs found
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
Generalized rainbow Turan problems
No full textAlon and Shikhelman [J. Comb. Theory, B. 121 (2016)] initiated the systematic study of the following generalized Turan problem: for fixed graphs H and F and an integer n, what is the maximum number of copies of H in an n-vertex F-free graph?An edge-colored graph is called rainbow if all its edges have different colors. The rainbow Turan number of F is defined as the maximum number of edges in a properly edge-colored graph on n vertices with no rainbow copy of F. The study of rainbow Turan problems was initiated by Keevash, Mubayi, Sudakov and Verstraete [Comb. Probab. Comput. 16 (2007)].Motivated by the above problems, we study the following problem: What is the maximum number of copies of F in a properly edge-colored graph on n vertices without a rainbow copy of F? We establish several results, including when F is a path, cycle or tree
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Alburnoides velioglui Turan, Kaya, Ekmekci & Dogan 2014
No full text<i>Alburnoides velioglui</i> Turan, Kaya, Ekmekçi & Doğan, 2014 [N]—Fırat chub <p> <b>Taxonomy.</b> Original description: <i>Alburnoides velioglui</i> Turan, Kaya, Ekmekçi & Doğan, 2014: 106, fig. 3 [Erzurum Province, Sirli Stream, Euphrates River drainage, 40°12’34"N, 41°4’30"E, Turkey; holotype: FFR 01094].— Iraq synonyms: None.—Revisions: None.—Illustration: Turan <i>et al</i>. (2014: 106, fig. 3).</p> <p> <b>Status in Iraq.</b> First record from Iraq by Freyhof <i>et al</i>. (2021).—Iraq materials: None.</p> <p> <b>Distribution and habitat.</b> Distribution in Iraq: Euphrates River drainages.—General distribution: Asia Minor: Euphrates River [Firat Nehri] basin (Persian Gulf tributary), Mardin Province (Turkey).—Habitat: This species is frequently found in slow-moving water. The species prefers the mid- and foothill zones of rivers. Freshwater.</p> <p> <b>Economic importance.</b> No commercial importance.</p> <p> <b>Conservation.</b> Conservation Status in Iraq: Unknown.—IUCN: NE (2023).—Threats: Unknown.—Moderate sensitivity to human activities.—Not considered as a keystone species.—Decline status: Unknown.— Moderate priority for conservation action.</p>Published as part of <i>Çiçek, Erdoğan, Jawad, Laith, Eagderi, Soheil, Esmaeili, Hamid Reza, Mouludi-Saleh, Atta, Sungur, Sevil & Fricke, Ronald, 2023, Freshwater fishes of Iraq: a revised and updated annotated checklist- 2023, pp. 1-49 in Zootaxa 5357 (1)</i> on page 20, DOI: 10.11646/zootaxa.5357.1.1, <a href="http://zenodo.org/record/10012543">http://zenodo.org/record/10012543</a>
Türkiye İç Sularından Dokuz Cyprinid Türünün Boy-Ağırlık İlişkisi
No full textBu çalışmada, Türkiye iç sularından kaydedilen dokuz yeni Cyprinid türü için (Barbus niluferensis Turan, Kottelat and Ekmekçi, 2009, Capoeta baliki Turan, Kottelat, Ekmekçi and Imamoglu, 2006, Capoeta banarescui Turan, Kottelat, Ekmekçi and Imamoglu, 2006, Capoeta ekmekciae Turan, Kottelat, Kirankaya and Engin, 2006, Capoeta erhani Turan, Kottelat and Ekmekçi, 2008, Capoeta turani Özuluğ and Freyhof, 2008, Luciobarbus kottelati Turan, Ekmekçi, Ilhan and Engin, 2008, Squalius kottelati Turan, Yilmaz and Kaya, 2009 and Squalius seyhanensis Turan, Kottelat and Doğan, 2013) boy-ağırlık ilişkileri (LWRs) ilk kez rapor edilmiştir. Determinasyon katsayısı (r2) 0,9951 ve 0,9767 arasında hesaplanmıştır. Türler için hesaplanan b değerleri ise 2.7895 ve 3.1176 arasında değişim göstermiştir. C. baliki (Pauly's t test: t 9.7098; P0.001) ve S. seyhanensis (Pauly's t test: t 6.5348; P0.001) türleri için allometrik büyüme özelliği tespit edilmiştirThis study reports first estimation of length-weight relationships for nine Cyprinid species; Barbus niluferensis Turan, Kottelat and Ekmekçi, 2009, Capoeta baliki Turan, Kottelat, Ekmekçi and Imamoglu, 2006, Capoeta banarescui Turan, Kottelat, Ekmekçi and Imamoglu, 2006, Capoeta ekmekciae Turan, Kottelat, Kirankaya and Engin, 2006, Capoeta erhani Turan, Kottelat and Ekmekçi, 2008, Capoeta turani Özuluğ and Freyhof, 2008, Luciobarbus kottelati Turan, Ekmekçi, Ilhan and Engin, 2008, Squalius kottelati Turan, Yilmaz and Kaya, 2009 and Squalius seyhanensis Turan, Kottelat and Doğan, 2013 from inland waters of Turkey. Coefficient of determinations (r2) ranged from 0.9951-0.9767 and b values ranged between 2.7895 and 3.1176. Allometric growth pattern was statistically observed for C. baliki (Pauly's t test: t 9.7098, P<0.001) and S. seyhanensis (Pauly's t test: t 6.5348, P<0.001
Barbus niluferensis Turan, Kottelat & Ekmekçi, 2009, new species
No full textBarbus niluferensis, new species Figure 5 Holotype. FFR 381, 143 mm SL; Turkey: Bursa Prov.: Orhangazi County: Karaköprü Stream, entering Doġancı Reservoir, Nilüfer River drainage, 40 °04'N 29 °00'E; D. Turan & Ş. G. Kırankaya, 14 September 2004. Paratypes. FFR 218, 50, 63–134 mm; CMK 18818, 5, 67–113 mm SL; CMK 18520, 5, 97–131 mm SL; CGE uncat., 21, 62– 119 mm SL; same data as holotype. Additional material (non types). FFR 2523, 12, 75–146 mm SL; Turkey: Bursa Prov.: Harmancık county: Kepekdere Stream at Kepekdere Village, Koca River drainage; D. Turan & R. Buyurucu, 8 July 2007. Diagnosis. Barbus niluferensis is distinguished from the other species of the genus in Turkey and the Aegean basin by having a less strongly ossified last simple dorsal-fin ray and with fewer serrae along the proximal part of its posterior margin (serrated along 49–52 % of its length, vs. 56–77; 15–17 serrae, vs. 18–32; Fig. 2 b) and fewer gill rakers on the first gill arch (6–8, modally 8, vs. 7–14, modally 9–11 in the different species; Table 2). It is further distinguished by the following characters (none unique to the species): a small size (largest known specimen 146 mm SL); a short caudal fin (15.7–20.4 % SL); large and numerous irregular black spots on the back, as well as on the fins and flank, and small black spots on the head, extending downwards to the cheek; fleshy lips; 62–71 lateral line scales; 13–15 scale rows between the lateral line and the dorsal-fin origin; 8–10 scale rows between the lateral line and the anal-fin origin; last simple dorsal-fin ray weakly ossified; body depth at dorsal-fin origin 17.2–22.4 % SL; and head length 23.3–25.7 % SL. Description. General appearance is shown in Figure 5 and head from below in Figure 3 b; morphometric and meristic data are given in Tables 1 and 2. Body slender and slightly compressed laterally. Upper profile arched in specimens smaller than about 100 mm SL, almost straight in larger ones; ventral profile almost straight at all sizes. Head deep, dorsal profile convex. Lips weakly developed, with papillae; lower lip with a short median lobe (Fig. 3 b). Maxillary barbel usually reaching nostrils. Dorsal fin with 4 simple and 8 ½ branched rays; posterior margin slightly convex; origin slightly in front of vertical through pelvic-fin origin; last simple ray weakly ossified and serrated along proximal 49–52 % of its posterior margin (Fig. 2 b). Pectoral fin rounded, with 1 simple and 16–18 branched rays. Pelvic fin rounded, with 1 simple and 8 branched rays. Anal fin with 3 simple and 5 ½ branched rays; outer margin convex; reaching base of caudal fin. Caudal fin forked, lobes rounded. Lateral line with 62 (2), 63 (4), 64 (2), 65 (3), 66 (3), 67 (4), 68 (1) and 71 (1) scales; 13 (8), 14 (9) and 15 (3) scale rows between lateral line and dorsalfin origin; 8 (5), 9 (13) and 10 (2) scale rows between lateral line and anal-fin origin. Gill rakers 2–3 + 4–5 = 6–8 on outer side of first gill arch. Vertebrae 27 + 16 = 43 (1), 28 + 15 = 43 (16), 28 + 16 = 44 (3). Pharyngeal teeth 5.3.2–2.3.5. Sexual dimorphism. Anal fin of female markedly longer than that of male. Coloration. Formalin preserved adults and juveniles grayish brown on back and flank, yellowish on belly. All fins yellowish; numerous large and irregular black spots on back and flanks, and small black spots on head, extending downwards to cheek; fine black spots on rays of all fins. Distribution and notes on biology. Barbus niluferensis is presently known only from Karaköprü Stream, a tributary of Nilüfer River, and Kepekdere Stream, a tributary of the Kocasu (= Koca), a river entering Lake Ulubat. Nilüfer and Koca join at Hayirlar (40 ° 17 ' N 28 ° 27 'E) and drain to the Sea of Marmara (Fig. 4). It inhabits swift flowing water, with cobble and pebble bottom. Barbus oligolepis, Alburnoides bipunctatus and Capoeta tinca have been collected together with B. niluferensis. Its maximum known size is 146 mm SL.Published as part of Turan, Davut, Kottelat, Maurice & Ekmekçi, Güler, 2009, Barbus niluferensis, a new species of barbel (Teleostei: Cyprinidae) from Nilüfer River, Turkey, with re-description of B. oligolepis, pp. 15-28 in Zootaxa 1981 on pages 21-23, DOI: 10.5281/zenodo.18529
Designing the Radio Link for a Lunar CubeSat: the LUMIO Case
No full textThe Lunar Meteoroid Impact Observer (LUMIO) is a mission designed to observe, quantify, and characterize the meteoroid impacts by detecting their flashes on the lunar far side. Earth-based lunar observations are restricted by weather, geometric and illumination conditions, while a lunar orbiter can improve the detection rate of lunar meteoroid impact flashes, as it would allow for longer monitoring periods. This paper will focus on the communications and radio navigation system of the mission, designed for the ESA roadmap for lunar exploration. LUMIO has been designed to operate autonomously after deployment from a lunar mother spacecraft in a low inclination lunar orbit and to reach without human intervention his final destination orbit close to the Earth-Moon L2 point, where science can be carried out. Being the destination orbit always in view from Earth (despite a distance of 460000 - 480000 km), Direct-to-Earth communication was added to the mission as a mean to reduce risk and allow independent verification of several of the innovative technologies that would be demonstrated, first of all autonomous navigation. A detailed link budget analysis will be presented for all mission phases for both the link with the mother spacecraft in low lunar orbit and the link with Earth. Beside defining the achievable data transfer, we will focus also on evaluating the available ground stations to better evaluate mission cost with respect to science return. Radio-navigation performances will also be evaluated to estimate the position and relative velocity accuracy, given also the limited performances available for the on-board navigation transponder. This will help also better defining the on-board autonomous navigation system, constraining the total error budget. Further strategies, such as beacon tones, will be evaluated to lower the overall operational cost by employing continuous monitoring with a low performances ground station and, only when needed, perform high speed downlink using a deep-space class ground station. This strategy is considered of extreme importance, especially for small missions, to allow opportunistic operations on high gain antennas, given their very busy schedule. Keywords: LUMIO, CubeSat, Lunar, Radio, linkGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Space Systems Egineerin
Divrik’li Muhammed B. İbrahim ve El-Muvaddıhu’l-Vefiyy (Şerhu’l-Avamili’l-Cedid) adlı eseri (inceleme ve tahakik)
No full textSoyadı : Ahat Taşcı lahiyat Arap Dili ve Belagatı Prof. Dr. Ahmet Turan Arslan Tez Türü ve Tarihi : Yüksek Lisans - Ağustos 2003 Muhammed, Muvaddıhu'l-Vefiyy, Avamil, Nahiv.Çalışmamızdaki amacımız Arap Dili ve Belagatı açısından önemli bulduğumuz bu eseri ilim alemine sunmak idi. Konumuz Divrik'li Muhammed b. İbrahim ve el-Muvaddıhu'l-Vefiyy (Şerhu'l-Avâmili'l-cedid) adlı eserinin inceleme ve tahkikidir. Üzerinde çalıştığımız bu eser İmam Birgivî'nin (981/ 1573) Arap Gramerine dair kaleme aldığı özet bir çalışma olan Avâmil isimli eserinin şerhidir. Divrik'li Muhammed b. İbrahim, XVIII. yy. ortalarında Tekirdağ'da müftülük yapmıştır ve ayrıca Süleymâniye Medresesi (II.) hocalarındandır. Çalışmamızın giriş bölümünde dönemin ilmî ve ictimâî durumunu ele alarak Arap grameri hakkında gerekli gördüğümüz bazı özet bilgiler verdik. Birinci bölümde müellifi, ikinci bölümde eseri tanıttık. Üçüncü bölümde ise tespit ettiğimiz müellif nüshasını esas alarak gerekli gördüğümüz diğer iki nüsha ile de karşılaştırıp şerhi tahkikli olarak takdim ettik. ABSRACT Announcing of the author's important work to the world of science was aimed in this work. The author Muhammed b. İbrahim and his work are very important in the Arabic Language and Meteoric area. My subject is the author Muhammed b. İbrahim who is from Divrik and his el-Muvaddıhu'l-Vefiyy (Şerhu'l-Avâmili'l-Cedîd) titled work. His work is an explanation on the work of İmam Birgivi (981/ 1573) which is titled Avâmil. The author was mufti in Tekirdağ in the middle of the XVIII th. Century. He worked as a teacher in the Süleymâniye Medresesi (II nd.). We presented a summary about science and social life at the beginning of this work. Also we gave some of the brief knowledge's on Arabic grammar in the first chapter the author and his work were introduced in the second chapter. The last one was left to investigation. Our investigation is based on the main manuscript of the author
Pragmatic Case Studies as a Source of Unity in Applied Psychology
No full textTo unify or not to unify applied psychology: that is the question. In this article we review pendulum swings in the historical efforts to answer this question—from a comprehensive, positivist, “top-down,” deductive yes between the 1930s and the early 60s, to a postmodern no since then. A rationale and proposal for a limited, “bottom-up,” inductive yes in applied psychology is then presented, employing a case-based paradigm that integrates both positivist and postmodern themes and components. This paradigm is labeled “pragmatic psychology” and, its specific use of case studies, the “Pragmatic Case Study Method” (“PCS Method”). We call for the creation of peer-reviewed journal-databases of pragmatic case studies as a foundational source of unifying applied knowledge in our discipline. As one example, the potential of the PCS Method for unifying different angles of theoretical regard is illustrated in an area of applied psychology, psychotherapy, via the case of Mrs. B. The article then turns to the broader historical and epistemological arguments for the unifying nature of the PCS Method in both applied and basic psychology.Peer reviewe
Asyrnptotics for the Turan number of Berge-K-2,K-t
No full textLet F be a graph. A hypergraph is called Berge-F if it can be obtained by replacing each edge in F by a hyperedge containing it.Let F be a family of graphs. The Turan number of the family Berge-F is the maximum possible number of edges in an r-uniform hypergraph on n vertices containing no Berge-F as a subhypergraph (for every F is an element of F) and is denoted by ex(r)(n, F).We determine the asymptotics for the Turan number of Berge-K-2,K-t, by showingex(3)(n, K-2,K-t) = (1 + o(1))1/6 (t - 1)(3/2) . n(3/2)for any given t >= 7. We study the analogous question for linear hypergraphs and showex(3)(n,{C-2, K-2,K-t}) = (1 + o(t)(1))1/6 root t - 1. n(3/2).We also prove general upper and lower bounds on the Turan numbers of a class of graphs including ex(r)(n, K-2,K-t), ex(r)(n, {C-2, K-2,K-t}), and ex,(n, C-2k) for r >= 3. Our bounds improve the results of Gerbner and Palmer [18], Fiiredi and Ozkahya [15], Timmons [37], and provide a new proof of a result of Jiang and Ma [26]. (C) 2019 Elsevier Inc. All rights reserved.DC
- …
