Results 31 to 40 of about 2,198,757 (314)

Estructura [PDF]

open access: yes, 1989
Determinar el cambio de denominación de la Dirección Nacional de Educación Pre - Primaria y Primaria por el de Dirección Nacional de Educación Inicial y Primaria ...
Sábato [Ministro]
core   +1 more source

Synergistic efforts in specimen digitisation, curation and cataloguing of Brazil's megadiverse flora and funga

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
The advancement of digital technologies has brought a rapid global information exchange, impacting all areas of our lives. This also applies to science. Knowledge, conservation and scientific innovation on global biodiversity are being strengthened and disseminated at unprecedented scales.
Ana Flávia Alves Versiane   +9 more
wiley   +1 more source

3He(α,γ)7Be cross section measured using complementary techniques

open access: yesEPJ Web of Conferences, 2014
The astrophysical S-factor for the 3He(α,γ)7Be reaction plays an important role in the Solar Standard Model and in the Big Bang Nucleosynthesis scenario. The advances from two recent experiments performed using complementary techniques at center of mass (
Carmona-Gallardo M.   +8 more
doaj   +1 more source

How digitisation of herbaria reveals the botanical legacy of the First World War

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Digitisation of herbarium collections is bringing greater understanding to bear on the complexity of narratives relating to the First World War and its aftermath – scientific and societal. Plant collecting during the First World War was more widespread than previously understood, contributed to the psychological well‐being of those involved and ...
Christopher Kreuzer, James A. Wearn
wiley   +1 more source

Estructura de elevador automatizado [PDF]

open access: yes, 2013
Nuestro proyecto trata de un elevador de cuatro pisos que funciona por dos motores de pasos para subir y bajar y abrir y cerrar la puerta de este. Fue realizado principalmente con el propósito de ayudar a las personas con discapacidades visuales o ...
Mares Reséndiz, Marco Antonio Sanromán   +2 more
core  

Características histológicas del útero de Sympterygia acuta (Garman, 1877) y Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes; Rajidae) [PDF]

open access: yes, 2013
Los condrictios constituyen un clado sumamente conservado y vulnerable a la explotación, que ha cobrado una importancia creciente en los últimos años. Sin embargo, existe poca información sobre los aspectos morfológicos relacionados con la reproducción ...
Díaz Andrade, María Constanza   +2 more
core   +1 more source

Muelle y edificio de servicios en el puerto de Alicante, España (1997-1998-2000)

open access: yesInformes de la Construccion, 2004
El concurso consistía en el diseño de un muelle para eldesembarque de viajeros de cercanías y, sobre él, unaedificación que albergase un quiosco y sombra de espera.Una oportunidad espléndida para explorar los dos extremosde la construcción más ligada a ...
Javier García-Solera   +3 more
doaj   +1 more source

Leveraging machine learning and citizen science data to describe flowering phenology across South Africa

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Recent shifts in flowering times are an index of, and a response to, human driven climate change. However, most information on these flowering changes is heavily skewed to the northern hemisphere. This imbalance limits our understanding of how climate change is affecting ecosystems, including the mismatches of flowering times between species, increased
Ross D. Stewart   +3 more
wiley   +1 more source

Determinantes del tipo impositivo efectivo en el sector turístico: un modelo dinámico con datos de panel [PDF]

open access: yes, 2017
This paper presents a dynamic model of the Effective Tax Rate (ETR) in the tourism sector. A dynamic model where the lagged endogenous variable ETR has been included as a regressor to identify the dynamic structure of the variable due to the existence
González Rodríguez, María Rosario   +2 more
core  

The dynamic links between product and process innovations and productivity for Colombian manufacturing [PDF]

open access: yesApplied Economic Analysis
Purpose – This paper aims to examine the interrelation between two innovating strategies (product and process) on total factor productivity (TFP) growth and the dynamic linkages between these strategies, for Colombia. The authors first explore whether ex
Juan A. Sanchis Llopis   +2 more
doaj   +1 more source

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