103,335 research outputs found
Procerobaetis freitagi Kaltenbach & Garces & Gattolliat 2020, gen. et sp. nov.
No full textProcerobaetis freitagi Kaltenbach & Gattolliat gen. et sp. nov. urn:lsid:zoobank.org:act: 8F16 E 037- FA 56-46C9- BE 5 F- 1530 CB 545115 Figs 8–11, 13, 14C Diagnosis: larva The main diagnostic character is the shape of gills III–VII, with long extended points at the apex (Fig. 10 D–H). The diagnostic characters of all species are summarized in Table 3. Etymology P. freitagi gen. et sp. nov. is dedicated to Professor Hendrik Freitag (Ateneo de Manila University) for his outstanding contribution to aquatic insect studies and for leading the passionate group of aquatic entomologists in the Philippines. Material examined Holotype PHILIPPINES • larva; Luzon, Nueva Ecija, Pantabangan, Candaclan River, rural; 15°46.80′ N, 121°13.28′ E; 240 m a.s.l.; 5 Feb. 1998; Mendoza leg.; on slide; voucher: GBIFCH 00592245; PNM. Paratypes PHILIPPINES • 1 larva; same collection data as for holotype; on slide; voucher GBIFCH 00515324; ZSM • 1 larva; same collection data as for holotype; on slide; voucher: GBIFCH 00658095; AdMU • 1 larva; same collection data as for holotype; in alcohol; voucher: GBIFCH 00515331; ZSM. Other material PHILIPPINES • 1 larva; Oriental Mindoro, Roxas, Barangay San Vicente, lower reach of Taugad River; 12°37.30′ N, 121°22.97′ E; 140 m a.s.l.; 8 Nov. 2018; J. Garces leg.; on slide; voucher: GBIFCH 00515323; ZSM. Description: larva (Figs 8–11, 13 A–B) BODY LENGTH. 4.5–4.8 mm. COLOURATION (Fig. 13A). Head, thorax and abdomen dorsally brown, head and thorax with bright median dorsal suture. Head, thorax and abdomen ventrally light brown, abdominal segments VI to IX gradually darker. Legs transparent, caudal filaments transparent. Head ANTENNA (Fig. 10A). Approximately 2× as long as head length; flagellum with lanceolate spines at apex of each segment, longer at inner lateral margin, increasing in length distally until segment IX–XI and decreasing thereafter. LABRUM (Fig. 8A). Rectangular, length 0.6× maximum width. Distal margin with medial emargination and a small process. Dorsally with some medium, fine, simple setae and some medium, stout, simple setae scattered over surface in proximal area; many long, stout, simple setae in anteromedial area, erratically distributed, not arranged in an arc. Ventrally with marginal row of setae composed of lateral and anterolateral long, feathered setae and medial long, bifid, pectinate setae; ventral surface with about five short, spine-like setae near lateral and anterolateral margin. RIGHT MANDIBLE (Fig. 8 B–C). Outer and inner set of denticles with 4+1+3 denticles. Margin between prostheca and mola straight, with a row of long, stout setae. Tuft of setae at apex of mola present. LEFT MANDIBLE (Fig. 8 D–E). Outer and inner set of denticles with 4+3 denticles. Subtriangular process long and slender, above level of area between prostheca and mola. Denticles of mola apically constricted. Setae at apex of mola absent. Both mandibles with lateral margins almost straight. Basal half with fine, simple setae scattered over dorsal surface. HYPOPHARYNX (Fig. 8F). Lingua shorter than superlingua, longer than broad, with medial tuft of long, stout setae. Superlingua distally almost straight, lateral margin rounded, with fine, long, simple setae along distal margin. MAXILLA (Fig. 8g). Galea-lacinia with two simple, robust apical setae under crown. Medially with one pectinate, spine-like seta and a row of 5–6 long, simple setae. Maxillary palp 2× as long as length of galea-lacinia; palp segment II 0.7× length of segment I, palp segment III 0.5× length of segment II; setae on maxillary palp fine, simple, scattered over surface of segments I, II and III; apex of last segment rounded. LABIUM (Fig. 8H). Glossae basally broad, narrowing toward apex, slightly shorter than paraglossae; inner margin with 9–10 spine-like setae; apex with two long and one medium, robust, pectinate setae; outer margin with seven spine-like setae, increasing in length distally; ventral surface with medium, fine, simple, scattered setae. Paraglossae sub-rectangular, apically curved inward; apex rounded, with three rows of long, robust setae; ventrally two medium, simple setae in anteromedial area; dorsally with a row of five long, spine-like setae near inner margin. Labial palp with segment I 0.9× length of segments II and III combined, ventrally with scattered short, fine, simple setae; segment II with very small distomedial expansion, ventrally with scattered short, fine, simple setae, dorsally with a row of 4–6 long, spine-like setae; segment III subquadrangular, apex rounded, ventrally covered with short spine-like, simple setae and short, fine, simple setae. Mentum distally with scattered fine, simple setae. Thorax FORELEG (Figs 9 A–G, 11A). Ratio of foreleg segments 1.4:1.0:1.0:0.3. Femur. Length 3.5–3.8× maximum width; dorsal margin with a row of 6–7 curved, spine-like setae; length of setae 0.25× maximum width of femur; apex rounded, with one pair of spine-like setae; many stout, lanceolate, laterally pectinate setae scattered along ventral margin; femoral patch absent. Tibia. Dorsal margin with a row of fine, simple setae; ventral margin with a row of curved, laterally pectinate, spine-like setae, at apex some longer, laterally pectinate, spine-like setae; anterior surface with scattered stout, lanceolate, laterally pectinate setae; patellotibial suture present on basal ⅓. Tarsus. Dorsal margin with a row of fine, simple setae; ventral margin with a row of curved, laterally pectinate, spine-like setae; tarsal claw elongate, slender, apically pointed, with one row of 7–10 larger denticles and many minute denticles, ventral margin at apex straight, with many stripes. MIDDLE LEG (Fig. 11B). As foreleg, but dorsal margin of femur slightly concave. HIND LEG (Fig. 11C). As foreleg, but dorsal margin of femur slightly concave and tarsal claw with one row of 10–12 larger denticles and many minute denticles. Abdomen TERGITES (Fig. 9H). Surface with scattered scales, U-shaped scale bases and micropores. Posterior margin of tergites VIII and IX with triangular spines. GILLS (Fig. 10 B–H). Present on segments I–VII; elongate, with very long, extended points; margin with very small denticles intercalating fine, simple setae; tracheae limited to main trunk. Gill I as long as length of segments II and III combined, gill II as long as length of segments III and ⅔ of IV combined, gill III as long as length of segments IV and V combined, gill IV as long as length of segments V and VI combined, gill V as long as length of segments VI and VII combined, gill VI as long as length of segments VII and VIII combined, gill VII as long as length of segments VIII to X combined. PARAPROCT (Fig. 9I). Posterior margin with 10–14 stout spines; surface with scattered U-shaped scale bases; posterolateral extension (cercotractor) with numerous small, marginal spines. CAUDAL FILAMENTS (Fig. 13A). Cerci ca 0.5× body length, median caudal filament ca. 0.8× length of cerci. Distribution Philippines: Luzon, Mindoro (Fig. 14C). Remarks The specimens were collected at low altitudes from 140 to 240 m a.s.l. in meandering alluvial rivers of small to medium size (width 2–12 m, depth 15–30 cm, water current 0.08–0.80 m /s, temperature 23–28.7° C, pH 6.8–8.3, dissolved oxygen 3.8–8.3 mg /l). The streams are surrounded by secondary vegetation, rarely secondary forest, with a few houses and farmland at some distance from the river bed as described in Garces et al. 2018. Genetics COI sequences were obtained from all three of the new species (Table 1). The genetic distances between these species are between 13% and 20%, much higher than 3.5%, which is generally considered as a likely maximal value for intraspecific divergence (Hebert et al. 2003; Ball et al. 2005; Zhou et al. 2010) (Table 4). Very limited genetic distances between 0 and 1% were found between specimens of the same species.Published as part of Kaltenbach, Thomas, Garces, Jhoana M. & Gattolliat, Jean-Luc, 2020, A new genus of Baetidae (Insecta, Ephemeroptera) from Southeast Asia, pp. 1-32 in European Journal of Taxonomy 612 on pages 17-23, DOI: 10.5852/ejt.2020.612, http://zenodo.org/record/370217
Texture, microstructure and mechanical properties of asymmetrically rolled AA6082 Aluminium alloy
No full textProcerobaetis Kaltenbach & Garces & Gattolliat 2020, gen. nov.
No full textProcerobaetis Kaltenbach & Gattolliat gen. nov. urn:lsid:zoobank.org:act: AF35EE1B-253D-4A27-8B46-AB1BED25D1F9 Figs 1–3, 6M, 7A, 12–14 Type species Procerobaetis leptobranchius gen. et sp. nov., by present designation. Diagnosis Larva This new genus is distinguished by the combination of the following characters: A) body elongate and slender, abdomen dorsoventrally flattened, head and thorax in lateral view rounded, head clearly hypognathous (Figs 12–13); B) base of antennae close to each other, with carina between them (Fig. 6M); C) antenna without process on scape, with spines on apex of flagellum segments, maximally expressed on flagellum segment IX (Fig. 3A); D) labrum on dorsal surface with many long, stout, simple setae, erratically distributed, not arranged in one arc (Fig. 1A); E) right mandible with a row of thin setae at inner margin of innermost denticle, a simple stick-like, apicolaterally pectinate prostheca and a row of long, stout setae between prostheca and mola (Fig. 1 B–C); F) left mandible with a row of short, stout setae and minute denticles between prostheca and mola, both directed toward subtriangular process, no setae at apex of mola (Fig. 1D); G) hypopharynx with a medial tuft of stout setae (Fig. 1F); H) 3-segmented maxillary palp much longer than galea-lacinia (Fig. 1G); I) glossae basally broad, narrowing toward apex, slightly shorter than paraglossae, ventral surface covered with erraticly distributed setae, paraglossae sub-rectangular, apically curved, labial palp segment II with small distolateral expansion, segment III sub-quadrangular (Fig. 1H); J) legs with short, laterally pectinate setae ventrally on femur, tibia and tarsus, femoral patch absent on all legs, patellotibial suture present on all legs, claw elongate and slender, pointed, slightly curved, with one row of many denticles increasing in length toward apex (Fig. 2 A–F); K) gills elongate, distally noticeably pointed, at least gills I and II with very long, extended apex (Figs 3 B–H, 10B–H); L) posterior margins of tergites I–VII without spines (Fig. 2G); M) paraproct without prolongation at posterior margin (Fig. 2H). Imagines Unknown. Etymology Procerobaetis is a combination of Procero – in reference to the elongate, slender habitus of the larvae – and baetis to highlight its superficial similarities with the genus Baetis Leach, 1815 s. lat. The gender is masculine. Description: larva Body Elongate and slender, abdomen dorsoventrally flattened, head and thorax in lateral view rounded, head hypognathous (Figs 12–13). Head ANTENNA (Figs 3A, 6M, 7A, 10A). Long, ca. 2× as long as head length; scape without process; scape and pedicel almost bare; flagellum with lanceolate spines at apex of each segment, longer at inner lateramargin, increasing in length distally until segment IX to XI and decreasing thereafter. Bases of antennae close to each other, with carina between them. LABRUM (Fig. 1A). Rectangular, wider than long; dorsal surface with many long, stout, simple setae, erratically distributed and not arranged in an arc; distolateral margin with feathered setae, distomedial margin with bifid setae. RIGHT MANDIBLE (Fig.1 B–C). Canine with largely fused incisors with well developed, apically rounded denticles, inner margin of innermost denticle with a row of thin setae; prostheca stick-like, apicolaterally pectinate; margin between prostheca and mola with a row of long, stout setae. LEFT MANDIBLE (Fig. 1 D–E). Canine with largely fused incisors with well developed, apically rounded denticles; prostheca robust, apically with small denticles and comb-shape structure; margin between prostheca and mola with a row of short stout setae and minute denticles, both directed toward subtriangular process; no setae at apex of mola. HYPOPHARYNX (Fig. 1F). With a medial tuft of stout setae. MAXILLA (Fig. 1G). Apically with three stout teeth and three denti-setae, distal denti-seta tooth-like, other denti-setae slender, bifid and pectinate; maxillary palp with three segments, much longer than galea-lacinia. LABIUM (Fig. 1H). Glossae basally broad, narrowing toward apex, slightly shorter than paraglossae, ventral surface covered with erratically distributed setae; paraglossae sub-rectangular, apically curved inward, apical margin with three rows of long setae; labial palp 3-segmented, segment II with small distolateral expansion, segment III sub-quadrangular. Mentum with scattered fine, simple setae at least in distal area. Thorax HINDWING PADS (Fig. 2I). Absent. FORELEG (Fig. 2 A–F). Long and slender; dorsal margin of femur with a row of medium, spine-like setae and many stout, lanceolate, laterally pectinate setae scattered along ventral margin, femoral patch absent; dorsal margin of tibia bare or with a row of fine setae, ventral margin with a row of stout, lanceolate, laterally pectinate setae; tarsus dorsally bare or with a row of fine setae, ventral margin with a row of stout, lanceolate, laterally pectinate setae; tarsal claw elongate and slender, pointed, slightly curved, with one row of many denticles increasing in length toward apex, subapical setae absent. Abdomen TERGITES (Fig. 2G). Posterior margin of segments I–VII smooth, without spines. GILLS (Figs 3 B–H, 10B–H). Seven pairs of single gills on segments I–VII, dorsally oriented, elongate, slender, distally noticeably pointed, at least gills I and II with very long, extended apex. PARAPROCT (Fig. 2H). With stout marginal spines and without prolongation at posterior margin. CAUDAL FILAMENTS (Fig. 13A). Inner margin of cerci with very thin, long setae; median caudal filament slightly shorter than cerci, bilaterally with very thin, long setae. Description: imagines Unknown. Distribution (Fig. 14) Indonesia: Sumatra; Philippines:Luzon, Mindoro; Thailand (based on a photo provided by B. Boonsoong, pers. comm.). The Baetidae of Southeast Asia are still poorly known, and many locations have not yet been sampled at all. We expect a wider distribution and more species of this genus in Southeast Asia.Published as part of Kaltenbach, Thomas, Garces, Jhoana M. & Gattolliat, Jean-Luc, 2020, A new genus of Baetidae (Insecta, Ephemeroptera) from Southeast Asia, pp. 1-32 in European Journal of Taxonomy 612 on pages 4-6, DOI: 10.5852/ejt.2020.612, http://zenodo.org/record/370217
Taxon-specific analysis of growth and mortality rates of harmful dinoflagellates during bloom conditions
No full textGrowth and mortality rates of natural single Alexandrium spp. cells were measured by the Landry-Hassett dilution technique during different phases of blooms. Taxon-specific experiments were conducted between May and October 2002 during 3 intense blooms of A. taylori and A. catenella at different locations of the Mediterranean Sea. In addition, dilution experiments using chlorophyll a as a proxy for total phytoplankton biomass were used to estimate daily rates of net growth and mortality of the total phytoplankton community. A. taylori growth rates ranged from 0.04 to 0.67 d(-1) and mortality rates from -0.20 to -0.65 d(-1). Growth rates of Gyninodinium sp., an accompanying dinoflagellate species during the A. taylori bloom studied, were similar to those measured for A. taylori, whereas their mortality rates (-0.58 to -0.82 d(-1)) were slightly higher. A. catenella growth and mortality rates were balanced (0.24 and 0.44 d(-1) compared with -0.25 and -0.44 d-1, respectively). The highest mortality rates (-0.65 d(-1)) were measured during the decline phase of 2 A taylori blooms. At the decline of the blooms, A. taylori and A. catenella showed considerable mortality, but microzooplankton grazing was not confirmed to be the main cause of the bloom termination. In general, growth was not limited by nutrients in the experiments. There were a few cases of a potential nutrient limitation in these areas and, in general, blooms were not conditioned by nutrients. When changes in biomass (chlorophyll a) were measured, non-linearity of data due to saturation was observed. The interpretation of these results required a split-function model. Saturated grazing (G(s)) was 28.9 mu g chl a 1(-1) d(-1), during which the saturating phytoplankton population represented a chl a concentration of 16 mu g 1(-1) (P-s)
A Three Decade Mixed-Method Bibliometric Investigation of the IEEE Transactions on Engineering Management
No full textThis paper offers a comprehensive overview of the IEEE Transactions on Engineering Management (IEEE TEM) from 1985 to 2017. This paper employs a mixed-method examination based on an in-depth interview with the new editor-in-chief regarding the challenges for the future of IEEE TEM, along with a bibliometric analysis of the journal. By using Web of Science Core Collection data, the analysis maps the knowledge produced and disseminated by IEEE TEM, revealing the most cited papers, the most frequently occurring keywords and the interconnection between them, the most prolific authors and their coauthorship network, and the most prolific countries for published articles. This paper also shows the main avenues of research covered by IEEE TEM and their evolution through the analysis of the correlation of keywords. This paper offers an example application of a mixed-method bibliometric analysis, seeking to extend the quantitative findings by including other sources of data
Product and process innovation in manufacturing firms: a 30-year bibliometric analysis
No full textBuilt upon a 30-year dataset collected from the web of science database, the present research aims to offer a comprehensive overview of papers, authors, streams of research, and the most influential journals that discuss product and process innovation in the manufacturing environment. The dataset is composed of 418 papers from more than 150 journals from the period between 1985 and 2015. Homogeneity analysis by means of alternating least squares (HOMALS) and social network analysis (SNA) are used to accomplish the objectives listed above through the keywords given by authors. Initially, the paper highlights and discusses the similarity between the topics debated by the main journals in this field. Subsequently, a wide-range map of topics is presented highlighting five main areas of interests; namely, performance, patent, small firm, product development, and organization. A SNA is also performed in order to validate the results that emerged from HOMALS. Finally, several insights about future research avenues in the manufacturing field are provided
Final Assessment of Preindustrial Solid-State Route for High-Performance Mg-System Alloys Production: Concluding the EU Green Metallurgy Project
No full textThe Green Metallurgy Project, a LIFE+ project co-financed by the European Union Commission, has now been completed. The purpose of the Green Metallurgy Project was to establish and assess a preindustrial process capable of using nanostructured-based high-performance Mg-Zn(Y) magnesium alloys and fully recycled eco-magnesium alloys. In this work, the Consortium presents the final outcome and verification of the completed prototype construction.
To compare upstream cradle-to-grave footprints when ternary
nanostructured Mg-Y-Zn alloys or recycled eco-magnesium chips are produced during the process cycle using the same equipment, a life cycle analysis was completed following the ISO 14040 methodology. During tests to fine tune the prototype machinery and compare the quality of semifinished bars produced using the scaled up system, the Buhler team produced interesting and significant results. Their tests showed the ternary Mg-Y-Zn magnesium alloys to have a highest specific strength over 6000 series wrought aluminum alloys usually employed in automotive components
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
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
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