Results 21 to 30 of about 7,376 (196)

Quasi-regular Sasakian and K-contact structures on Smale–Barden manifolds [PDF]

open access: yesRevista matemática iberoamericana, 2020
Smale-Barden manifolds are simply-connected closed 5-manifolds. It is an important and difficult question to decide when a Smale-Barden manifold admits a Sasakian or a K-contact structure.
Alejandro Cañas   +3 more
semanticscholar   +1 more source

A Smale–Barden manifold admitting K-contact but not Sasakian structure [PDF]

open access: yesJournal of the European Mathematical Society (Print), 2020
We give the first example of a simply connected compact 5-manifold (Smale-Barden manifold) which admits a K-contact structure but does not admit any Sasakian structure, settling a long standing question of Boyer and Galicki.
V. Muñoz
semanticscholar   +1 more source

Gompf connected sum for orbifolds and K-contact Smale–Barden manifolds [PDF]

open access: yes, 2020
We develop the Gompf fiber connected sum operation for symplectic orbifolds. We use it to construct a symplectic 4-orbifold with b1=0{b_{1}=0} and containing symplectic surfaces of genus 1 and 2 that are disjoint and span the rational homology.
V. Muñoz
semanticscholar   +1 more source

CANDELS: THE COSMIC ASSEMBLY NEAR-INFRARED DEEP EXTRAGALACTIC LEGACY SURVEY—THE HUBBLE SPACE TELESCOPE OBSERVATIONS, IMAGING DATA PRODUCTS, AND MOSAICS [PDF]

open access: yes, 2011
This paper describes the Hubble Space Telescope imaging data products and data reduction procedures for the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS).
A. Koekemoer   +123 more
semanticscholar   +1 more source

Galaxy Groups in the SDSS DR4. I. The Catalog and Basic Properties [PDF]

open access: yes, 2007
We use a modified version of the halo-based group finder developed by Yang et al. to select galaxy groups from the Sloan Digital Sky Survey (SDSS DR4).
Xiaohu Yang   +5 more
semanticscholar   +1 more source

CANDELS: THE COSMIC ASSEMBLY NEAR-INFRARED DEEP EXTRAGALACTIC LEGACY SURVEY [PDF]

open access: yes, 2011
The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) is designed to document the first third of galactic evolution, over the approximate redshift (z) range 8–1.5.
N. Grogin   +106 more
semanticscholar   +1 more source

A review on emerging contaminants in wastewaters and the environment: current knowledge, understudied areas and recommendations for future monitoring.

open access: yesWater Research, 2015
This review identifies understudied areas of emerging contaminant (EC) research in wastewaters and the environment, and recommends direction for future monitoring. Non-regulated trace organic ECs including pharmaceuticals, illicit drugs and personal care
Bruce Petrie   +2 more
semanticscholar   +1 more source

Molecfit: A general tool for telluric absorption correction - I. Method and application to ESO instruments [PDF]

open access: yes, 2015
Context. The interaction of the light from astronomical objects with the constituents of the Earth’s atmosphere leads to the formation of telluric absorption lines in ground-based collected spectra. Correcting for these lines, mostly a ecting the red and
A. Smette   +13 more
semanticscholar   +1 more source

Availability of family planning services and quality of counseling by faith-based organizations: a three country comparative analysis

open access: yesReproductive Health, 2017
Background Faith-based organizations (FBOs) have a long history of providing health services in developing countries and are important contributors to healthcare systems.
Janine Barden-O’Fallon
doaj   +1 more source

National Nurse Work Environments - October 2021: A Status Report.

open access: yesCritical Care Nurse, 2022
BACKGROUND The health of nurse work environments has been shown to affect both patient and nurse outcomes. In 2005, the American Association of Critical-Care Nurses published the AACN Standards for Establishing and Sustaining Healthy Work Environments: A
B. Ulrich   +4 more
semanticscholar   +1 more source

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