Results 31 to 40 of about 6,810 (263)

New data on the anatomy of fuxianhuiid arthropod Guangweicaris spinatus from the lower Cambrian Guanshan Biota, Yunnan, China [PDF]

open access: yesActa Palaeontologica Polonica, 2020
The fuxianhuiid arthropod Guangweicaris spinatus, from the lower Cambrian (Series 2, Stage 4), Guanshan Biota (Wulongqing Member, Canglangpu Formation), located in the vicinity of Kunming (Yunnan Province, southwest China), is redescribed based on new ...
Hong Chen   +4 more
doaj   +1 more source

Cambrian fans

open access: yesJournal of the European Mathematical Society, 2009
For a finite Coxeter group W and a Coxeter element c of W, the
Nathan Reading, David E. Speyer
openaire   +3 more sources

Sedimentary characteristics and development model of Cambrian gypsum-salt rocks, Tarim Basin

open access: yesShiyou shiyan dizhi, 2021
The Cambrian gypsum-salt rocks in the Tarim Basin are key geological elements to the pre-salt play typical marine evaporites, yet little attention has been paid to this set of evaporites.
Qi FAN   +5 more
doaj   +1 more source

The Cambrian explosion [PDF]

open access: yesCurrent Biology, 2015
The sudden appearance of fossils that marks the so-called 'Cambrian explosion' has intrigued and exercised biologists since Darwin's time. In On the Origin of Species, Darwin made it clear that he believed that ancestral forms 'lived long before' their first fossil representatives.
openaire   +2 more sources

Accessing Heart Health: A Northern Experience

open access: yesOnline Journal of Rural Nursing and Health Care, 2011
Background and Research Purpose: Coronary heart disease (CHD) continues to be a major cause of death and disability across the globe. Regional differences in CHD exist throughout Canada, including Ontario. It is important to explore the complex interplay
Katherine Timmermans   +6 more
doaj   +1 more source

Causes of the Cambrian Explosion [PDF]

open access: yesScience, 2013
The rapid diversification of animal species in the early Cambrian was the result of a range of interacting biotic and abiotic processes.
Smith, M.P., Harper, D.A.T.
openaire   +3 more sources

Research on Reservoir Characteristics and Main Controlling Factors of Longwangmiao Formation of Cambrian in Sichuan Basin

open access: yesFrontiers in Earth Science, 2022
Based on the 4 measured profiles, 17 observation profiles, and 13 drilling core macroscopic and microscopic characteristics of the Cambrian Longwangmiao Formation in the Sichuan Basin, combined with analysis and testing, and reservoir logging ...
Qiang Wang   +3 more
doaj   +1 more source

Cambrian lattices

open access: yesAdvances in Mathematics, 2006
Revisions in exposition (partly in response to the suggestions of an anonymous referee) including many new figures. Also, Conjecture 1.4 and Theorem 1.5 are replaced by slightly more detailed statements. To appear in Adv. Math.
openaire   +3 more sources

Carbon isotope composition and its evolution around the base of the Drumian Stage in Linzhou area, northern Henan

open access: yes地质科技通报, 2022
Carbon isotope stratigraphy is an important means to subdivide and correlate the Cambrian strata. Based on the carbon isotope analysis of the carbonate strata of Lütuogou Section, northern Henan Province, it is found the δ13C value of carbonate samples ...
Yonglin Chen   +5 more
doaj   +1 more source

Critical Reflection on Educator Experiences of Negotiated Grading

open access: yesCanadian Journal for the Scholarship of Teaching and Learning
The paper “Critical Reflection on Educator Experiences of Negotiated Grading” reports on an alternative grading system in higher education. Instead of the traditional method where the teacher solely decides grades, this “negotiated grading” system ...
Laura Killam   +2 more
doaj   +1 more source

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