Results 61 to 70 of about 1,234,720 (380)

A pedagogy of abundance

Revista Española de Pedagogía, 2023
The digitalisation of content combined with a global network for delivery and an open system for sharing has seen radical changes in many industries. The economic model which has underpinned many content based industries has been based on an assumption of scarcity.
openaire   +2 more sources

Bewertung und Verbesserung der Biodiversität in landwirtschaftlichen Gebieten unter besonderer Berücksichtigung von Vogelarten als Bioindikatoren

Julius-Kühn-Archiv, 2013
Agricultural landscapes have crucial functions for biodiversity conservation. Contrary to the goals of biodiversity protection the habitat functions and the biological diversity are deteriorating, especially in arable areas.
Hoffmann, Jörg, Wiegand, Ina, Wittchen, Udo, Ehlert, Sigrid, Berger, Gert, Pfeffer, Holger   +5 more
doaj   +1 more source

Results of 40-year Studies of the X-Ray Binary Cyg X-1 = V1357 Cyg

Open Astronomy, 2016
This paper reviews the results of our 40-year studies of Cyg X-1 using various methods and observational data: mainly optical photometric, spectroscopic, and polarimetric ones, with X-ray data also considered.
Karitskaya E. A.
doaj   +1 more source

Chemical Analysis of the Brightest Star of the Cetus II Ultrafaint Dwarf Galaxy Candidate

The Astrophysical Journal, 2023
We present a detailed chemical abundance analysis of the brightest star in the ultrafaint dwarf (UFD) galaxy candidate Cetus II from high-resolution Magellan/MIKE spectra.
K. B. Webber, T. T. Hansen, J. L. Marshall, J. D. Simon, A. B. Pace, B. Mutlu-Pakdil, A. Drlica-Wagner, C. E. Martínez-Vázquez, M. Aguena, S. S. Allam, O. Alves, E. Bertin, D. Brooks, A. Carnero Rosell, J. Carretero, L. N. da Costa, J. De Vicente, P. Doel, I. Ferrero, D. Friedel, J. Frieman, J. García-Bellido, G. Giannini, D. Gruen, R. A. Gruendl, S. R. Hinton, D. L. Hollowood, K. Honscheid, K. Kuehn, J. Mena-Fernández, F. Menanteau, R. Miquel, R. L. C. Ogando, M. E. S. Pereira, A. Pieres, A. A. Plazas Malagón, E. Sanchez, B. Santiago, J. Allyn Smith, M. Smith, E. Suchyta, G. Tarle, C. To, N. Weaverdyck, B. Yanny   +44 more
doaj   +1 more source

Soil bacterial quantification approaches coupling with relative abundances reflecting the changes of taxa

Scientific Reports, 2017
Understanding the abundance change of certain bacterial taxa is quite important for the study of soil microbiology. However, the observed differences of relative abundances by high-throughput techniques may not accurately reflect those of the actual ...
Zhaojing Zhang, Y. Qu, Shuzhen Li, Kai Feng, Shang Wang, Weiwei Cai, Yuting Liang, Hui Li, Meiying Xu, Huaqun Yin, Ye Deng   +10 more
semanticscholar   +1 more source

Gaia FGK benchmark stars: abundances of α and iron-peak elements [PDF]

, 2015
Context. In the current era of large spectroscopic surveys of the Milky Way, reference stars for calibrating astrophysical parameters and chemical abundances are of paramount importance. Aims.
P. Jofre, U. Heiter, C. Soubiran, Sergi Blanco-Cuaresma, Sergi Blanco-Cuaresma, T. Masseron, T. Nordlander, L. Chemin, C. Worley, S. V. Eck, A. Hourihane, G. Gilmore, V. Adibekyan, M. Bergemann, M. Bergemann, T. Cantat-Gaudin, E. Delgado-Mena, J. I. G. Hernández, J. Hernández, G. Guiglion, C. Lardo, P. Laverny, K. Lind, L. Magrini, Š. Mikolaitis, Š. Mikolaitis, D. Montes, E. Pancino, E. Pancino, A. Recio-Blanco, R. Sordo, S. Sousa, H. Tabernero, A. Vallenari   +33 more
semanticscholar   +1 more source

Chemical sensitivity to the ratio of the cosmic-ray ionization rates of He and H2 in dense clouds [PDF]

, 2006
Aim: To determine whether or not gas-phase chemical models with homogeneous and time-independent physical conditions explain the many observed molecular abundances in astrophysical sources, it is crucial to estimate the uncertainties in the calculated ...
Baldwin, Bergin, Boger, Charnley, Dalgarno, E. Herbst, F. Selsis, G. Massacrier, Glassgold, Graedel, Herbst, Le Bourlot, Le Bourlot, Le Teuff, Lee, Pagani, Pineau des Forets, Shalabiea, Smith, Snell, Terzieva, V. Wakelam, Wakelam, Wakelam, Wakelam   +24 more
core   +3 more sources

Direct D-atom Incorporation in Radicals: An Overlooked Pathway for Deuterium Fractionation

The Astrophysical Journal, 2023
Direct D-H exchange in radicals is investigated in a quasi-uniform flow employing chirped-pulse millimeter-wave spectroscopy. Inspired by the H-atom catalyzed isomerization of C _3 H _2 reported in our previous study, D-atom reactions with the propargyl (
Nureshan Dias, Ranil M. Gurusinghe, Bernadette M. Broderick, Tom J Millar, Arthur G. Suits   +4 more
doaj   +1 more source

CHAOS I. DIRECT CHEMICAL ABUNDANCES FOR H II ?> REGIONS IN NGC 628 [PDF]

, 2015
The CHemical Abundances of Spirals (CHAOS) project leverages the combined power of the Large Binocular Telescope (LBT) with the broad spectral range and sensitivity of the Multi Object Double Spectrograph (MODS) to measure “direct” abundances (based on ...
D. Berg, E. Skillman, K. Croxall, R. Pogge, J. Moustakas, Mara Johnson-Groh   +5 more
semanticscholar   +1 more source

An abundance of heterotic vacua [PDF]

Journal of High Energy Physics, 2008
We explicitly construct the largest dataset to date of heterotic vacua arising from stable vector bundles on Calabi-Yau threefolds. Focusing on elliptically fibered Calabi-Yau manifolds with spectral cover bundles, we show that the number of heterotic models with non-zero number of generations is finite.
Gabella, M, He, Y, Lukas, A
openaire   +4 more sources