71,200 research outputs found
Eruption of the Eyjafjallajokull Volcano in spring 2010 : Multiwavelength Raman lidar measurements of sulphate particles in the lower troposphere
No full textA fraction of the volcanic plume that originated from the Eyjafjallajokull volcanic eruption on Iceland in 2010 reached the southern Iberian Peninsula in May 2010. The plume was monitored and characterized in terms of optical and microphysical properties with a combination of Raman lidar and star- and Sun-photometers. Our observations showed that the plume arriving at the Iberian Peninsula was mainly composed of sulphate and sulphuric-acid particles. To our knowledge, this is the first study of optical properties and inverted microphysical properties of volcanic sulphate particles in the lower troposphere/boundary layer based on multiwavelength Raman lidar measurements. A remarkable increase in the particle number concentration in the accumulation mode was determined from the inversion of the aerosol optical properties. The large Angstrom exponents and low linear particle depolarization ratios (4-7%) indicated the presence of small and spherical particles. The particle effective radii ranged between 0.30 and 0.55 mu m. In situ instrumentation confirmed an increase of sulphate particles at ground level during this period. Citation: Navas-Guzman, F., D. Muller, J. A. Bravo-Aranda, J. L. Guerrero-Rascado, M. J. Granados-Munoz, D. Perez-Ramirez, F. J. Olmo, and L. Alados-Arboledas (2013), Eruption of the Eyjafjallajokull Volcano in spring 2010: Multiwavelength Raman lidar measurements of sulphate particles in the lower troposphere, J. Geophys. Res. Atmos., 118, 1804-1813, doi:10.1002/jgrd.50116
Optical and microphysical properties of fresh biomass burning aerosol retrieved by Raman lidar, and star-and sun-photometry
No full textA fresh biomass-burning pollution plume was monitored and characterized in terms of optical and microphysical properties for the first time with a combination of Raman lidar and star- and sun-photometers. Such an instrument combination is highly useful for 24-h monitoring of pollution events. The observations were made at Granada (37.16 degrees N, 3.6 degrees W), Spain. The fresh smoke particles show a rather pronounced accumulation mode and features markedly different from those reported for aged particles. We find lidar ratios around 60-65 sr at 355 nm and 532 nm, and particle effective radii below 0.20 mu m. We find low values of the single-scattering albedo of 0.76-0.9 depending on measurement wavelength. The numbers are lower than what have been found for aged, long-range-transported smoke that originated from boreal fires in Canada and Siberia. Citation: Alados-Arboledas, L., D. Muller, J. L. Guerrero-Rascado, F. Navas-Guzman, D. Perez-Ramirez, and F. J. Olmo (2011), Optical and microphysical properties of fresh biomass burning aerosol retrieved by Raman lidar, and star- and sun-photometry, Geophys. Res. Lett., 38, L01807, doi:10.1029/2010GL045999
[Letter from Arthur S. Rosichan to J. L. Zuber - August 11, 1944]
No full textLetter from Arthur S. Rosichan to J. L. Zuber: August 11, 1944. Subject of the letter is the author moving to Houston to work for the Jewish Community Council
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Leonhard Schultze-Jena y sus investigaciones sobre la Montaña de Guerrero. 1 Año 1 (2014) enero-marzo. Rutas de Campo. Estudiosos de Guerrero: Semblanzas
No full textBroda, Johanna, Convocar a los dioses: Ofrendas mesoamericanas, Jalapa, Instituto Veracruzano de la Cultura, 2013a.Broda, Johanna, “Ofrendas mesoamericanas en una perspectiva comparativa”, en J. Broda (coord.), Convocar a los dioses: ofrendas mesoamericanas, Jalapa, Instituto Veracruzano de Cultura, 2013b, pp. 639-702.Broda, Johanna, “Leonhard Schultze-Jena y sus investigaciones sobre ritualidad en la Montaña de Guerrero”, Anales de Antropología, vol. 42, 2008, pp. 117-145.Broda, Johanna, “La etnografía de la fiesta de la Santa Cruz: una perspectiva histórica”, en J. Broda y Félix Báez-Jorge (coords.), Cosmovisión, ritual e identidad de los pueblos indígenas de México, México, FCE, 2001, pp. 165-238.Broda, Johanna, “Cosmovisión y observación de la naturaleza: el ejemplo del culto de los cerros”, en J. Broda, Stanislaw Iwaniszewski y Lucrecia Maupomé (eds.), Arqueoastronomía y etnoastronomía en Mesoamérica, México, Instituto de Investigaciones Históricas-UNAM, 1991, 461-500.Broda, Johanna (coord.), Códice Cospi, ed. facsimilar, Graz, Akademische Druck-und Verlagsanstalt (Adeva), 1968.Celestino Solís, Eustaquio, “Gotas de maíz: sistema de cargos y ritual agrícola en San Juan Tetelcingo, Guerrero”, tesis de doctorado en antropología, México, Facultad de Filosofía y Letras-UNAM, 1997.Códice Laud, ed. facsimilar, Graz, Adeva, 1966.Códice Fejérváry-Mayer, ed. facsimilar, Graz, Adeva, 1971.Dehouve, Daniele, “El depósito ritual tlapaneco”, en J. Broda (coord.), Convocar a los dioses: ofrendas mesoamericanas, Jalapa, Instituto Veracruzano de la Cultura, 2013a, pp. 127-170.Dehouve, Daniele, “El depósito ritual: un ritual figurativo”, en J. Broda (coord.), Convocar a los dioses: Ofrendas mesoamericanas, Jalapa, Instituto Veracruzano de la Cultura, 2013b, pp. 605-639.Dehouve, Daniele, L’imaginaire des nombres chez les anciens Mexicains, Rennes, Presses Universitaires de Rennes, 2011.Dehouve, Daniele, La ofrenda sacrificial entre los tlapanecos de Guerrero, Chilpancingo, Universidad Autónoma de Guerrero/Plaza y Valdés/CEMCA, 2007.Dehouve, Daniele, “El Fuego Nuevo: interpretación de una ‘ofrenda contada’ tlapaneca (Guerrero, México)”, Journal de la Societé des Americanistes, núm. 97, 2001, pp. 89-112.Good Eshelman, Catharine, “La circulación de la fuerza en el ritual: las ofrendas nahuas y sus implicaciones para analizar las prácticas religiosas mesoamericanas”, en J. Broda (coord.), Convocar a los dioses: ofrendas mesoamericanas, Jalapa, Instituto Veracruzano de la Cultura, 2013, pp. 45-82.Good Eshelman, Catharine, “Oztotempan: el ombligo del mundo”, en J. Broda, Stanislaw Iwaniszewski y Arturo Montero (coords.), La montaña en el paisaje ritual (estudios arqueológicos, etnohistóricos y etnográficos), México, ENAH/IIH-UNAM, 2001, pp. 375-393.Lehmann, Walter, Zentralamerika.I. Teil: Die Sprachen Zentral- Amerikas in ihren Beziehungen zueinander sowie zu SüdAmerika und Mexiko, Berlín, vols.1 y 2, 1920.Leib, Jürgen, “100 Jahre Lehrstuhl für Geographie an der Philipps-Universität Marburg”, en 100 Jahre Geographie in Marburg, Marburger Geographische Schriften, núm. 71, 1977, pp. 179-207.Nowotny, Karl Anton, Tlacuilolli: Die Mexikanischen Bilderhandschriften, Berlín, Verlag Gebr. Mann, 1961.Olivera, Mercedes, “Huémitl de Mayo en Citlala: ¿ofrendas para Chicomecóatl o para la Santa Cruz?”, en Barbro Dahlgren (ed.), Mesoamérica: homenaje al doctor Paul Kirchhoff, México, INAH, 1979, pp. 143-158.Schultze-Jena, Leonhard, Alt-Aztekische Gesänge, Stuttgart, Verlag Kohlhammer, 1957.Schultze-Jena, Leonhard Gliederung des altaztekischen Volkes in Familie, Stand und Beruf, traducción del manuscrito náhuatl de Bernardino de Sahagún, Stuttgart, Verlag Kohlhammer, 1952.Schultze-Jena, Leonhard, Wahrsagerei, Himmelskunde und Kalender der alten Azteken, traducción del manuscrito náhuatl de Bernardino de Sahagún, Stuttgart, Verlag Kohlhammer, 1950.Schultze-Jena, Leonhard, La vida y las creencias de los indígenas quichés de Guatemala, Guatemala, Ministerio de Educación Pública (Biblioteca de Cultura Popular, 49), 1947.Schultze-Jena, Leonhard, Popol Vuh, das Heilige Buch der Quiché-Indianer, traducción y comentarios, Sttutgart-Berlín, Verlag Kohlhammer, 1944.Schultze-Jena, Leonhard, Bei den Azteken, Mixteken und Tlapaneken der Sierra Madre del Sur von Mexiko, Jena, G. Fischer-Verlag (Indiana, III), 1938.Schultze-Jena, Leonhard, Mythen in der Muttersprache der Pipil von Izalco in El Salvador, Jena, G. Fischer-Verlag (Indiana, II), 1935.Schultze-Jena, Leonhard, Leben, Glaube und Sprache der Quiché von Guatemala, Jena, G. Fischer-Verlag (Indiana, I), 1933.Schultze-Jena, Leonhard, Zur Kenntnis des Körpers der Hottentotten und Buschmänner, Jena, 1928.Schultze-Jena, Leonhard, Makedonien, Landschafts-und Kulturbilder, Jena, 1927.Schultze-Jena, Leonhard, Forschungen im Inneren der Insel Neuguinea, Berlín, Mitteilungen an den Deutschen Schutzgebieten, Ergänzungsheft , núm. 11, 1914.Schultze-Jena, Leonhard, Zur Kenntnis der Melanesischen Sprache von der Insel Tumleo, Jena, 1911.Schultze-Jena, Leonhard, “Südwest-Afrika”, en Das Deutsche Kolonialreich, Leipzig-Viena, 1910.Schultze-Jena, Leonhard, Aus Namaland und Kalahari, Jena, 1907.Sepúlveda, María Teresa, “Petición de lluvias en Ostotempa”, Boletín INAH, 2a época, núm. 4, 1973, pp. 9-20.Stein, Harry, “Leonhard Schultze (1908-1911)”, en H. Stein, “Die Geographie an der Universität Jena (1786-1939”), Erdkundliches Wissen, Wiesbaden, núm. 29, 1972, pp. 105-111.Súarez Jácome, Cruz, “Petición de lluvia en Zitlala, Guerrero”, Boletín INAH, 3a época, núm. 22, 1978, pp. 3-13.Termer, Franz, “Leonhard Schultze-Jena (28/5/1872-29/3/1955)”, en Petermanns Geographische Mitteilungen, núm. 99, 1955, pp. 212-213.Loo, Peter L. van der, “Códices, costumbres, continuidad: un estudio de la religión mesoamericana”, Indiaanse Studies, vol. 2, 1987.Wal, Hans van der y María del Carmen Rojas Canales, “Un testimonio sobre los mixtecos, nahuas y tlapanecos. La Montaña de Guerrero por los ojos de Leonhard Schultze Jena”, ponencia presentada en el Coloquio Mixtecas Nahua Tlapaneca: 30 Años Después, México, IIA-UNAM, 7-11 de septiembre de 1992.Villela F., Samuel L., “Ídolos en los altares. La religiosidad indígena en la Montaña de Guerrero”, Arqueología Mexicana, núm. 82, 2006, 62-67.Villela F., Samuel L., “El culto a San Marcos y el ritual agrícola en la Mixteca nahua tlapaneca”, Suplemento Diario de Campo, núm. 28, 2004.Villela F., Samuel L., “Ritual agrícola en la Montaña de Guerrero”, Antropología, núm. 30, 1990, pp. 2-7
DNA barcoding of the genus Apaidia Hampson, 1900 for species delimitation from Western Mediterranean fauna (Lepidoptera, Erebidae)
No full textOrtiz, A. S., Rubio, R. M., Guerrero, J. J., Garre, M., Yela, J. L. (2023): DNA barcoding of the genus Apaidia Hampson, 1900 for species delimitation from Western Mediterranean fauna (Lepidoptera, Erebidae). Zootaxa 5343 (2): 193-200, DOI: 10.11646/zootaxa.5343.2.5, URL: http://dx.doi.org/10.11646/zootaxa.5343.2.
Recent advances in heartworm disease
No full textThis compilation of articles consists of four papers presented at the 19th International Conference of the World Association for the Advancement of Veterinary Parasitology (WAAVP) (held in New Orleans, LA, USA, on 10-14 August 2003) in a symposium session titled "Recent Advances in Heartworin Disease," organized and chaired by John W. McCall and Jorge Guerrero. The first paper (Guerrero) covered the American Heartworm Society's most recent revision of their guidelines for the diagnosis, prevention, and management of heartworm infection in dogs, based on new research and clinical expen*ence, particularly in the areas of heartworm chemoprophylaxis, adulticide therapy, and serologic testing and retesting. The entire updated 2003 "Guidelines" are presented herein. One paper (McCall) reviewed the "soft-kill" adulticidal and "safety-net" (reach-back, retroactive, clinical prophylactic) activity of prolonged dosing of prophylactic doses of macrocyclic lactones, concluding that ivermectin is the most effective in this way, milbemycin oxime is the least effective, and the activity of injectable moxidectin and selamectin lies between that of ivermectin and milbemycin oxime. The two remaining papers provided an overview of the discovery, rediscovery, phylogeny, and biological association between Wolbachia endosymbionts and filarial nematodes (Genchi and co-authors) and compelling evidence that Wolbachia may play a major role in the inummopathogenesis of filarial diseases of man and animals (Kramer and co-authors)
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
Hawking-like emission in kink-soliton escape from a potential well.
No full textThe escape of solitons over a potential barrier is analysed within the framework of a nonlinear Klein–Gordon equation. It is shown that the creation of a kink–antikink pair near the barrier through an internal mode instability can be followed by escape of the kink in a process analogous to Hawking radiation. These results have important implications in a wider context, including stochastic resonance and ratchet systems, which are also discussed
- …
