Results 11 to 20 of about 2,357,602 (292)

The Propagators for δ and δ′ Potentials With Time-Dependent Strengths [PDF]

open access: yesFrontiers in Physics, 2020
We study the time-dependent Schrödinger equation with finite number of Dirac δ and δ′ potentials with time dependent strengths in one dimension. We obtain the formal solution for generic time dependent strengths and then we study the particular cases for
Fatih Erman, Manuel Gadella, Haydar Uncu
doaj   +3 more sources

Mixed conducting yttrium-barium-cobalt-oxide for high oxygen permeation [PDF]

open access: yes, 1994
Yttrium-barium-cobalt-oxide (YBC), especially with low Y content, has been prepared. Oxygen permeation in these materials is very high at moderate temperature.
Brinkman, H.W.   +4 more
core   +3 more sources

The vertical distribution of iron stable isotopes in the North Atlantic near Bermuda [PDF]

open access: yes, 2012
Seawater dissolved iron isotope ratios (δ^(56)Fe) have been measured in the North Atlantic near Bermuda. In a full-depth profile, seawater dissolved δ^(56)Fe is isotopically heavy compared to crustal values throughout the water column (δ^(56)Fe_(IRMM-014)
Adkins, Jess, John, Seth G.
core   +1 more source

A deep-sea coral record of North Atlantic radiocarbon through the Younger Dryas: Evidence for intermediate water/deepwater reorganization [PDF]

open access: yes, 2006
Our record of Younger Dryas intermediate-depth seawater Δ^(14)C from North Atlantic deep-sea corals supports a link between abrupt climate change and intermediate ocean variability.
Adkins, Jess F.   +4 more
core   +2 more sources

Residual log-periodogram inference for long-run relationships [PDF]

open access: yes, 2006
We assume that some consistent estimator of an equilibrium relation between non-stationary series integrated of order d(0.5,1.5) is used to compute residuals (or differences thereof).
Hassler, U.   +2 more
core   +2 more sources

Countable ordinals and the analytical hierarchy, I [PDF]

open access: yes, 1975
The following results are proved, using the axiom of Projective Determinacy: (i) For n ≥ 1, every II(1/2n+1) set of countable ordinals contains a Δ(1/2n+1) ordinal, (ii) For n ≥ 1, the set of reals Δ(1/2n) in an ordinal is equal to the largest countable ...
Kechris, A. S.
core   +2 more sources

Systematic investigation of changes in oxidized cerebral cytochrome c oxidase concentration during frontal lobe activation in healthy adults [PDF]

open access: yes, 2012
Using transcranial near-infrared spectroscopy (NIRS) to measure changes in the redox state of cerebral cytochrome c oxidase (Δ[oxCCO]) during functional activation in healthy adults is hampered by instrumentation and algorithm issues.
Asgari   +48 more
core   +1 more source

Βιβλιοπαρουσίαση: "Δεσμός, συναίσθημα και διαπροσωπικές σχέσεις" (2005)

open access: yesΨυχολογία: το Περιοδικό της Ελληνικής Ψυχολογικής Εταιρείας, 2020
ΔΕΝ ΔΙΑΤΙΘΕΤΑΙ ...
Γεώργιος Δ. Σιδερίδης
doaj   +1 more source

Ethanolamine induced modification in glycine betaine and proline metabolism in Nicotiana rustica under salt stress

open access: yesBiologia Plantarum, 2017
The present study aimed to investigate the effects of ethanolamine on glycine betaine and proline metabolism in Nicotiana rustica under salt stress.
S. Rajaeian   +3 more
doaj   +1 more source

Analysis of Incomplete Data and an Intrinsic-Dimension Helly Theorem [PDF]

open access: yes, 2008
The analysis of incomplete data is a long-standing challenge in practical statistics. When, as is typical, data objects are represented by points in R^d , incomplete data objects correspond to affine subspaces (lines or Δ-flats).With this motivation we ...
Gao, Jie   +2 more
core   +2 more sources

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