Results 111 to 120 of about 27,007 (226)

Synthesis of hexa (imidazolyl) cyclotriphosphazene and its performance as curing catalyst of epoxy resin

open access: yesCailiao gongcheng, 2019
Hexa (imidazolyl) cyclotriphosphazene (HImCP) was synthesized by nucleophilic substitution reaction of hexachlorocyclotriphosphazene with imidazole. The chemical structure was characterized by FT-IR,1H-NMR, and 31P-NMR.
ZHANG Bo-wen   +6 more
doaj   +1 more source

Clearing the Dust from Globular Clusters

open access: yes, 2008
Recent Spitzer observations of the globular cluster M15 detected dust associated with its intracluster medium. Surprisingly, these observations imply that the dust must be very short-lived compared to the time since the last Galactic plane crossing of ...
Binney   +18 more
core   +1 more source

The great exchange: Rapid demonetization in Trinidad and Tobago

open access: yesLatin American Journal of Central Banking, 2020
Trinidad and Tobago executed a surprise demonetization of its largest currency note in December 2019 to address financial crimes. This evaluation of the outcome finds that the exercise was relatively well managed by the authorities within the short time ...
Alvin Hilaire, Reshma Mahabir
doaj  

Development and Testing of a Multidimensional iPhone Pain Assessment Application for Adolescents with Cancer

open access: yesJournal of Medical Internet Research, 2013
BackgroundPain is one of the most common and distressing symptoms reported by adolescents with cancer. Despite advancements in pain assessment and management research, pain due to cancer and/or its treatments continues to be poorly managed.
Stinson, Jennifer N   +12 more
doaj   +1 more source

Pseudo-spherical submanifolds with 1-type pseudo-spherical Gauss map

open access: yes, 2015
In this work, we study the pseudo-Riemannian submanifolds of a pseudo-sphere with 1-type pseudo-spherical Gauss map. First, we classify the Lorentzian surfaces in a 4-dimensional pseudo-sphere $\mathbb{S}^4_s(1)$ with index s, $s=1, 2$, and having ...
Bektaş, Burcu   +2 more
core   +1 more source

UN ENFOQUE MONETARIO DE LA INFLACIÓN EN EL LARGO PLAZO. El caso de Uruguay (1870-2010)

open access: yesEl Trimestre Económico, 2016
El objetivo de este artículo es explicar el comportamiento de la inflación en Uruguay durante el largo plazo (1870-2010). Se utiliza un modelo de inflación monetaria, pues se entiende que la trayectoria de largo plazo de la inflación debería estar ...
Conrado Brum   +2 more
doaj  

The Unique Type Ib Supernova 2005bf at Nebular Phases: A Possible Birth Event of A Strongly Magnetized Neutron Star

open access: yes, 2007
Late phase nebular spectra and photometry of Type Ib Supernova (SN) 2005bf taken by the Subaru telescope at ~ 270 and ~ 310 days since the explosion are presented.
Hattori, T.   +8 more
core   +1 more source

¿Existe evidencia de asimetrías en la gestión de la política monetaria por parte del Banco Central Europeo? (1999-2014)

open access: yesEl Trimestre Económico, 2016
El objetivo de este artículo es verificar la presencia de asimetrías en la actuación del Banco Central Europeo (BCE) desde el inicio de su mandato hasta finales de 2014. La metodología utilizada es doble: la estimación, mediante el método de los momentos
Esther Barros-Campello   +2 more
doaj  

A Luminous and Fast-Expanding Type Ib Supernova SN 2012au

open access: yes, 2013
We present a set of photometric and spectroscopic observations of a bright Type Ib supernova SN 2012au from -6d until ~+150d after maximum. The shape of its early R-band light curve is similar to that of an average Type Ib/c supernova.
Akitaya, H.   +17 more
core   +1 more source

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