101,431 research outputs found
Taller GBIF.ES online: Manejo, visualización y análisis de datos en ecología con R (nivel iniciación)
No full textEl taller forma parte del Programa de Formación de la Unidad de Coordinación de GBIF España.-- Se ha realizado en modalidad online en cuatro ocasiones (2018, 2019, 2020 y 2021) y fue registrado en el programa de cursos de especialización del Consejo Superior de Investigaciones Científicas.-- El contenido del taller se puede descargar desde su página web (https://www.gbif.es/talleres/iv-taller-online-r-en-ecologia-iniciacion/) donde se ubica un enlace a los vídeos-tutoriales subidos a YouTube y un archivo comprimido .zip que contiene presentaciones (PDF) y casos prácticos usados durante el taller.-- Para la realización autónoma del taller es necesario tener conexión a internet.-- Los profesores del taller son: Alejandro González Fernández de Castro (RJB-CSIC) y Julia Chacón Labella (INIA-CSIC).-- El material contenido en este taller está sujeto a licencia Creative Commons Reconocimiento 4.0 Internacional (CC-BY 4.0).Este taller teórico-práctico tiene como objetivo sentar las bases para usar y desarrollar R de una manera autónoma y utilizar el software para manejar, manipular, visualizar y analizar datos de ecología y biodiversidad. Se hace especial énfasis en aquellas herramientas que posibilitan ser un usuario eficiente del programa.-- El taller está dirigido a usuarios de datos de biodiversidad, en general, y de GBIF, en particular.N
Chusquea septentrionalis Ruiz-Sanchez, Art. Castro & Clark
No full textChusquea septentrionalis emend. Ruiz-Sanchez, Art. Castro & Clark TYPE:— MEXICO. Durango. Municipality Pueblo Nuevo: Santa Bárbara, Santa Bárbara State Park to the end of the interpretative trail, 3 km from the bifurcation to the Puentecillas State Park, 2724 m, 15 Dec 2015 (sterile), A. Castro-Castro and J. G. González-Gallegos 4241 (holotype: CIIDIR!; isotypes: IBUG!, ISC!, MEXU!). Description:—Rhizomes pachymorph, short-necked. Culms 1.5–3.0 m tall, 10–20 mm in basal diameter, erect, somewhat arching toward the apices. Internodes 80–170 mm long, 15–36 per culm, terete, glabrous, green to dark green purple, hollow, the walls 3–5 mm thick, the lacuna occupying 50% of the total diameter. Culm leaves 100–190 mm long, extending along the whole internode and overlapping the next node, persistent and disintegrating on the culm, glabrous; sheaths 90–140 mm long, rectangular with a strongly convex apex, 3.3–9.0 times as long as the blade, with margins ciliolate from white cilia; blades 10–42 mm long, triangular, erect, persistent, short mucronate at apex, with margins finely ciliate, abaxially and adaxially glabrous becoming adaxially sparsely pubescent toward the apex; girdle absent; inner ligule ca. 0.05 mm long, ciliate. Nodes at mid culm with the central bud slightly larger than the subsidiaries, triangular; subsidiary buds 3–6 per complement, axillary, closely adjacent and linearly arranged in 1 row, with the base of the buds arising about 2 mm above the nodal line; prophylls with ciliate margins; nodal line more or less horizontal, supranodal ridge present and prominent. Branching intravaginal; 3–6 branches per node, growing almost parallel to the main culm, 130–400 mm long, 1–2 mm in diameter, rebranching (second order) and developing a single branch. Foliage leaves 3–9 per complement; sheaths glabrous, with entire margin; blades 90–165 mm long, 5–12 mm wide, L:W 13–21; blades adaxially and abaxially strongly tessellate, glabrous, attenuate at base, subulate at apex, with finely scabrous margin; pseudopetioles 1.5–3.0 mm long, adaxially and abaxially glabrous; inner ligules 5–10 mm long, well developed, clasping the branch, abaxially glabrous; outer ligule a ciliate irregular rim 0.2–1.0 mm long. Synflorescences 45–90 mm long, 1–15 mm wide, narrow, somewhat congested, not fully exserted from the subtending sheath; rachis slightly sinuate, angular, slightly scabrous; branches appressed, but not strongly so, ascending, 10–20 mm long, angular, scabrous; pedicels 1–5(–7) mm long, angular, scabrous. Spikelets (6.2–)7.2–8.8(–10.8) mm long, 1–1.3 mm wide, glabrous, laterally compressed. Glumes I and II ovate, obtuse, glabrous, enervate; glume I (0.2–)0.6– 1(–1.4) mm long, 1/50–1/5 the spikelet length; glume II 0.6–1.2 mm long, 1/15–1/4 the spikelet length. Glumes III and IV scabrous, awned, margin entire, ciliate to the apex; glume III including the awn (4.4–)4.6–6.8(–7.2) mm long, 5-nerved, the awn (0.6–) 1.2–2.2 mm, 1/4–3/4 the spikelet length; glume IV including the awn (5.6–)5.8–7.8(–8.2) mm long, 3–4-nerved, the awn 0.6–1.2 mm long, 1/2–9/10 the spikelet length, 4–5-nerved. Lemmas (6–) 8–9 mm long, 7–nerved, green, scabrous, awned, margin ciliate toward the apex; awn 0.6–0.8 mm long, 5-nerved. Paleas (6–) 8–9 mm long, 2–nerved, scabrous; nerves scabrous, apex biapiculate, the sulcus scabrous. Lodicules 3, membranaceous, 0.6–0.8 mm long, glabrous, hyaline, margin entire, apex truncate. Stamens and stigmas not seen. Fruit not seen (Fig. 4). Habitat and distribution:— Chusquea septentrionalis was described from Durango state, known from three localities (Ruiz-Sanchez et al. 2017). This species inhabits coniferous forest growing from 2333–2729 m (including elevation data from the new records first reported here). We recorded the presence of this species far north (25°39’49.17’’N, 107°0’25.44’’W) in Sinaloa state from the type locality (Fig. 2, 5), making this species unquestionably the northernmost of the genus. Comparison:—Synflorescences and spikelets of C. septentrionalis are more similar to C. bilimekii than to C. perotensis (Table 2). Synflorescences are congested-paniculate in C. septentrionalis and C. bilimekii and openpaniculate in C. perotensis. Further comparisons will be between C. septentrionalis and C. bilimekii. Glumes I and II are glabrous in C. septentrionalis and abaxially pubescent in C. bilimekii. Glumes III and IV are abaxially scabrous in C. septentrionalis and pubescent in C. bilimekii. Glumes III and IV are awned in C. septentrionalis, but are subulate and apiculate in C. bilimekii. Lemmas are shorter (6–) 8–9 mm and abaxially scabrous in C. septentrionalis, and these are longer (9.6–10.1 mm) and pubescent in C. bilimekii (Table 2). Etymology:—The specific epithet refers to this species having the northernmost distribution among the members of Chusquea subg. Swallenochloa . Phenology:—The first known flowering record for this species was collected during the summer of 2019 (A. Castro-Castro et al. 4600). All flowers examined from this specimen, however, were past mature and had no fruits. Specimens examined:— Durango: Durango municipality, Salto del Agua Llovida, km 58 de la brecha Navios-El Regocijo-San Isidro-Molinillos, a partir del km 72 de la carretera Méx. 40 Durango-Mazatlán, 23°32’15.6’’N, 104°15’15.5’’W, 2333 m, 10 julio 2019, (fl), A. Castro-Castro et al. 4600 (CIIDIR, IBUG); Pueblo Nuevo, La Ciudad, Parque Ecoturístico Mexiquillo, alrededores de la cascada, 23°42’5’’N, 105°40’14.9’’W, 2551 m elevación, 8 agosto 2019, A. Castro-Castro et al. 4497 (CIIDIR); parque la Pirámide, camino en cañada, paralelo al primer túnel, carretera Durango-Mazatlán, 23°43’5.09’’N, 105°31’2.39’’W, 2729 m, 27 agosto 2021, S.E. Centeno & R. Machado 152 (CIIDIR). Sinaloa: Badiraguato, Santa Gertrudis, camino a Santa Gertrudis-Alisitos-La Herradura, 25°39’49.17’’N, 107°0’25.44’’W, 2560 m elevación, 1 noviembre 2020, E.I. Rojas-Aguilar & M.A. González-Bernal 398a (CIIDIR, IBUG).Published as part of Ruiz-Sanchez, Eduardo, Castro-Castro, Arturo & Clark, Lynn G., 2022, A new informal group in Chusquea subg. Swallenochloa (Poaceae: Bambusoideae: Bambuseae) and emended descriptions for the Mexican endemics C. enigmatica and C. septentrionalis, pp. 47-58 in Phytotaxa 554 (1) on pages 51-55, DOI: 10.11646/phytotaxa.554.1.3, http://zenodo.org/record/680977
The stability of laminar symmetric separated wakes
No full textTime-dependent computations of the two-dimensional incompressible uniform-velocity laminar flow past a normal flat plate (of unit half-width) in a channel are presented. Attention is restricted to cases in which the well-known anti-symmetric (von Kármán-type) vortex shedding is suppressed by the imposition of a symmetry plane on the downstream plate centreline. With a further symmetry plane at the channel's upper boundary, the only two governing parameters in the problem are the channel half-width, H, and the Reynolds number, Re (based on the body half-width and the upstream velocity, U). The former is restricted to the range 3?H?30 and the interest lies in determining the nature of the initial instability which occurs in the separated wake as Re is gradually increased. It is found that for sufficiently large H and at a critical Re, a long-time-scale global (supercritical) instability is initiated, which in its saturated (limit) state takes the form of ‘lumps’ of vorticity being periodically shed from the tail end of the separated bubble. Stability calculations of corresponding mean flow profiles (typical of those found in the separated wake) are undertaken by examining the impulse response of particular profiles via appropriate solution of the Orr–Sommerfeld equation. The results of this analysis extend those available from related published work and are consistent with the behaviour found from the numerical computations. Taken together, all the results suggest that this type of global instability may be generic to many kinds of separated wakes and, indeed, may provide the fundamental explanation for the very low-frequency oscillations often noticed in fully turbulent wake bubbles
The dialogue between the author and the hero in the “Notes” of G. R. Derzhavin
No full textВ центре внимания автора статьи «Записки» Г. Р. Державина, представляющие по своей сути его автобиографию. Труд этот был создан на закате жизни, он включает все важнейшие события жизни Г. Р. Державина, поэта и государственного деятеля. Рассказ ведется от третьего лица, что придает особую атмосферу повествованию, выстраивается своеобразный диалог между автором и героем, все это и является предметом исследования автора статьи.The focus of the author of the article “Notes” G. R. Derzhavin, representing in essence his autobiography. This work was created at the end of his life; it includes all the most important events in the life of G. R. Derzhavin, poet and statesman. The story is told in a third person, which gives a special atmosphere to the story, a certain dialogue emerges between the author and the hero, all this is the subject of the author's research
Glutamicibacter creatinolyticus strain LGCM 259 chromosome, complete genome
No full textNCBI Reference Sequence: NZ_CP034412.1
The complete genome sequencing of G. creatinolyticus LGCM 259 was deposited with the
National Center for Biotechnology Information (NCBI) under accession number CP034412; BioProject:
PRJNA507728, BioSample: SAMN10502625, Assembly: GCF_006094275.1 and the same became NCBI
RefSeq sequence NZ_CP034412.1. https://www.ncbi.nlm.nih.gov/nuccore/1679400616.
LOCUS NZ_CP034412 3309128 bp DNA circular CON 08JUN2019
DEFINITION Glutamicibacter creatinolyticus strain LGCM 259 chromosome,
complete genome.
ACCESSION NZ_CP034412
VERSION NZ_CP034412.1
DBLINK BioProject: PRJNA224116
BioSample: SAMN10502625
Assembly: GCF_006094275.1
KEYWORDS RefSeq.
SOURCE Glutamicibacter creatinolyticus
ORGANISM Glutamicibacter creatinolyticus
Bacteria; Actinobacteria; Micrococcales; Micrococcaceae;
Glutamicibacter.
REFERENCE 1 (bases 1 to 3309128)
AUTHORS Santos,R.G., Silva,A.L., Seyffert,N., Castro,T.L.P., Attili,A.R.,
Rifici,C., Mazzullo,G., Brenig,B., Venanzi,F. and Azevedo,V.
TITLE Complete Genome Sequence of Glutamicibacter creatinolyticus strain
LGCM259,isolated from an abscess of a 12yearold
mare in Italy
JOURNAL Unpublished
REFERENCE 2 (bases 1 to 3309128)
AUTHORS Santos,R.G., Silva,A.L., Seyffert,N., Castro,T.L.P., Attili,A.R.,
Rifici,C., Mazzullo,G., Brenig,B., Venanzi,F. and Azevedo,V.
TITLE Direct Submission
JOURNAL Submitted (07DEC2018)
General Biology, UFMG, Av Antonio Carlos
6627, Pampulha, Belo Horizonte, Minhas Gerais 31270901,
Brazil
COMMENT REFSEQ INFORMATION: The reference sequence was derived from
CP034412.
The annotation was added by the NCBI Prokaryotic Genome Annotation
Pipeline (PGAP). Information about PGAP can be found here:
https://www.ncbi.nlm.nih.gov/genome/annotation_prok/
Bacteria and source DNA available from GcLGCM259.
##GenomeAssemblyDataSTART##
Assembly Date :: OCT2018
Assembly Method :: SPAdes v. 3.9.1
Assembly Name :: GcLGCM259
Genome Representation :: Full
Expected Final Version :: Yes
Genome Coverage :: 286.0x
Sequencing Technology :: Illumina HiSeq
##GenomeAssemblyDataEND##
##GenomeAnnotationDataSTART##
Annotation Provider :: NCBI RefSeq
Annotation Date :: 06/07/2019 10:17:37
Annotation Pipeline :: NCBI Prokaryotic Genome
Annotation Pipeline (PGAP)
Annotation Method :: Bestplaced
reference protein
set; GeneMarkS2+
Annotation Software revision :: 4.8
Features Annotated :: Gene; CDS; rRNA; tRNA; ncRNA;
repeat_region
Genes (total) :: 3,035
CDSs (total) :: 2,962
Genes (coding) :: 2,882
CDSs (with protein) :: 2,882
Genes (RNA) :: 73
rRNAs :: 4, 4, 4 (5S, 16S, 23S)
complete rRNAs :: 4, 4, 4 (5S, 16S, 23S)
tRNAs :: 58
ncRNAs :: 3
Pseudo Genes (total) :: 80
CDSs (without protein) :: 80
Pseudo Genes (ambiguous residues) :: 0 of 80
Pseudo Genes (frameshifted) :: 31 of 80
Pseudo Genes (incomplete) :: 51 of 80
Pseudo Genes (internal stop) :: 6 of 80
GenBank
Due to the large size of this record, sequence and annotated features are not shown. Use the "Customize view" panel to change the display##GenomeAnnotationDataEND##
COMPLETENESS: full length.
FEATURES Location/Qualifiers
source 1..3309128
/organism="Glutamicibacter creatinolyticus"
/mol_type="genomic DNA"
/strain="LGCM 259"
/isolation_source="abcess of a mare"
/host="horse"
/db_xref="taxon:162496"
/country="Italy"
/collection_date="2015"
CONTIG join(CP034412.1:1..3309128)
/
Weakly stratified laminar flow past normal flat plates
No full textNumerical computations of the steady, two-dimensional, incompressible, uniform velocity but stably stratified flow past a normal flat plate (of unit half-width) in a channel are presented. Attention is restricted to cases in which the stratification is weak enough to avoid occurrence of the gravity wave motions familiar in more strongly stratified flows over obstacles. The nature of the flow is explored for channel half-widths, H, in the range 5 [less-than-or-eq, slant] H [less-than-or-eq, slant] 100, for Reynolds numbers, Re, (based on body half-width and the upstream velocity, U) up to 600 and for stratification levels between zero (i.e. neutral flow) and the limit set by the first appearance of waves. The fourth parameter governing the flow is the Schmidt number, Sc, the ratio of the molecular diffusion of the agent providing the stratification to the molecular viscosity. For cases of very large (in the limit, infinite) Sc a novel technique is used, which avoids solving the density equation explicitly. Results are compared with the implications of the asymptotic theory of Chernyshenko & Castro (1996) and with earlier computations of neutral flows over both flat plates and circular cylinders. The qualitative behaviour in the various flow regimes identified by the theory is demonstrated, but it is also shown that in some cases a flow zone additional to those identified by the theory appears and that, in any case, precise agreement would, for most regimes, require very much higher Re and/or H. Some examples of multiple (i.e. non-unique) solutions are shown and we discuss the likelihood of these being genuine, rather than an artefact of the numerical scheme.<br/
Archeologia nel territorio dei Monti Sicani (Harvesting Memories project). L’insediamento di lunga durata di Contrada Castro (Corleone, Palermo). Prima campagna di scavo 2017.
No full textThe “Harvesting Memories” project aims to address diachronic change in landscape and settlement patterns during the long-term in the area of Sicani Mountains in Central-West Sicily (Italy). This area is a sort of palimpsest of Mediterranean inland areas characterized by a long-term occupation of low-lying lands suitable for agriculture and hills for pastoral activi-ties. The settlement dynamics of this inner area are well documented in the archaeological sequence of the hilltop site of Contrada Castro. Recent excavation (spring 2017) showed dry-stone structures related to the Islamic and Norman period (9th-12th c. AD), a Byzantine infant burial (7th-8th c. AD) and evidence (layer of morphology regularization and pottery) con-nected to an archaic indigenous settlement (6th-5th c. BC). The investigation of this new rural site provided relevant insights of longue durée patterns in hilltop settlements of Sicily between Antiquity and Middle Ages
Shake-up Satellites In High Energy Auger Spectra Of The 4d Metals
No full textInterpretation of the satellites of the Cu L2,3M4,5M4,5 has involved considerable controversy in recent years. Reaching unambiguous conclusions is impeded by the contribution of Coster-Kronig (CK) transitions, requiring considerable experimental investigation before clarifying the relative roles of shake-up and CK processes. The L2,3M4,5M4,5 spectra of Ag, Pd and Rh excited by bremsstrahlung also have satellite features and manifest the following experimental systematics: both the L3 and L2 losses are displaced the same amount relative to their respective main peaks and their shapes are approximately the same; there seems to be little CK contribution; and comparison with alloy spectra indicate the intrinsic nature of the losses, consistent with energy loss measurements. We demonstrate that the satellite relative positions and lineshapes are consistent with the spectator vacancy interpretation, so that they appear to correspond basically to broadened, displaced "images" of the corresponding main spectra. It seems that the satellites are almost entirely caused by intra-atomic shake-up processes; the "image" nature of their lineshapes resembles that of extrinsic losses in other metals.357-358251254Kleiman, G.G., Landers, R., Nascente, P.A.P., De Castro, S.G.C., (1992) Phys. Rev. B, 46, p. 1970Mariot, J.-M., Ohno, M., (1986) Phys. Rev. B, 34, p. 2182Yoshii, K., Baba, Y., Sasaki, T.A., (1995) J. Electron Spectrosc., 72, p. 107Landers, R., Nascente, P.A.P., De Castro, S.G.C., Kleiman, G.G., (1992) J. Phys. Condens. Matter, 4, p. 5881Landers, R., Nascente, P.A.P., De Castro, S.G.C., Kleiman, G.G., (1993) Surf. Sci., 287-288, p. 802Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1993) Surf. Sci., 287-288, p. 798Landers, R., Kleiman, G., De Castro, S.G.C., (1995) J. Electron Spectrosc., 72, p. 211Kleiman, G.G., Landers, R., De Castro, S.G.C., (1994) J. Electron Spectrosc., 68, p. 329Kleiman, G.G., Landers, R., De Castro, S.G.C., (1994) Phys. Rev. B, 49, p. 2753Lang, N.D., Williams, A.R., (1977) Phys. Rev. B, 16, p. 2408Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1992) Phys. Rev. B, 45, p. 13899Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1991) Phys. Rev. B, 44, p. 3383Kleiman, G.G., Landers, R., De Castro, S.G.C., Nascente, P.A.P., (1992) J. Vac. Sci. Technol. A, 10, p. 2839Kleiman, G.G., Landers, R., Nascente, P.A.P., De Castro, S.G.C., (1992) Phys. Rev. B, 46, p. 4405Kleiman, G.G., Landers, R., Nascente, P.A.P., De Castro, S.G.C., (1993) Surf. Sci., 287-288, p. 794Kleiman, G.G., (1993) J. Phys. Condens. Matter, 5, p. 1Kleiman, G.G., Landers, R., De Castro, S.G.C., Rogers, J.D., (1991) Phys. Rev., 644, p. 8529Kleiman, G.G., (1982) Appl. Surf. Sci., 11-12, p. 730Nascente, P.A.P., De Castro, S.G.C., Landers, R., Kleiman, G.G., (1991) Phys. Rev. B, 43, p. 4659Wagner, C.D., Taylor, J.A., (1980) J. Electron Spectrosc., 20, p. 83Sundaram, V.S., Rogers, J.D., Landers, R., (1981) J. Vac. Sci. Technol. A, 19, p. 117Condon, E.U., Shortley, G.H., (1963) The Theory of Atomic Spectra, , Cambridge University, LondonKleiman, G.G., Landers, R., De Castro, S.G.C., unpublishedLanders, R., Kleiman, G.G., De Castro, S.G.C., J. Electron Spectrosc., , in pressNyholm, R., Mårtensson, N., (1980) J. Phys. C, 13, pp. L279Mårtensson, N., Nyholm, R., (1981) Phys. Rev. B, 24, p. 7121noteMartensson, N., Johansson, B., (1983) Phys. Rev. B, 28, p. 3733Drube, W., Lessmann, A., Materlik, G., (1992) Jpn. J. Appl. Phys., 32, p. 17
Stochastic strong-motion simulation of the Umbria-Marche earthquake of September 1997 (Mw 6): comparison of different approaches
No full textAbstract We simulated strong-motion records from the Umbria–Marche, central
Italy, earthquake (Mw 6) of September 1997 using a frequency-dependent S-wave
radiation function. We compared the observed acceleration spectra, from strongmotion
instruments located in the near field and at regional distances, with those simulated
using the stochastic modeling technique of Beresnev and Atkinson (1997,
1998), and modified to account for a frequency-dependent radiation pattern correction.
By using the frequency-dependent radiation function previously obtained by
Castro et al. (2006), we reduced the overall fitting error of the acceleration spectra
by about 9%. In general, we observed that the frequency-dependent radiation pattern
correction has a small effect on the spectral amplitudes compared with site effects,
which is an important factor controlling the strong-motion records generated
by the 1997 Umbria–Marche earthquake. In addition, we modeled the observed
ground-motion records using the dynamic corner frequency model of Motazedian
and Atkinson (2005) to reproduce the directivity effects, reducing the average error
of the spectral amplitudes by 24%. We concluded that although the frequencydependent
radiation pattern correction affects the frequency content of the spectral
amplitudes simulated, site and directivity effects are more relevant.Published662–6704.1. Metodologie sismologiche per l'ingegneria sismicaJCR Journalreserve
Le metodologie di scavo
No full textUn volume che presenta al grande pubblico le più recenti scoperte scientifiche di un sito chiave del Quaternario mediterraneo: Grotta Romanelli (Castro, Lecce). Le attività di scavo archeologico sono riprese dal 2015 a cura di Sapienza Università di Rom
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