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American Journal of Orthodontics and Dentofacial Orthopedics, 2014
Across-sectional study is an observational study in which the exposure and the outcome are determined at the same time point for each study participant. Cross-sectional studies comprise the simplest individual-level observational study design and are usually relatively inexpensive and easy to conduct compared with case-control or cohort studies.
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Across-sectional study is an observational study in which the exposure and the outcome are determined at the same time point for each study participant. Cross-sectional studies comprise the simplest individual-level observational study design and are usually relatively inexpensive and easy to conduct compared with case-control or cohort studies.
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MONOIDS WITH IDEMPOTENT CROSS-SECTIONS
International Journal of Algebra and Computation, 2001In this paper we consider monoids M with an idempotent cross-section Λ of regular [Formula: see text]-classes such that for all idempotents e, f of M with e≥f, there exists x in the unit group such that x-1ex, x-1fx∈Λ. Such monoids arise frequently in connection with group representations.
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Cross-Coupling of Heteroatomic Electrophiles
Chemical Reviews, 2019Katerina M Korch, Donald A Watson
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Nickel-Catalyzed Cross-Couplings Involving Carbon−Oxygen Bonds
Chemical Reviews, 2011Brad M Rosen +2 more
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Applications of Palladium-Catalyzed C–N Cross-Coupling Reactions
Chemical Reviews, 2016Stephen L Buchwald
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