نتایج جستجو برای: جهش δ 32
تعداد نتایج: 178577 فیلتر نتایج به سال:
Objectives: The majority (80%) of stroke survivors in Bangladesh have lived with either minor or major physical, emotional, and cognitive disabilities. Due to patients’ poor perceived experience in healthcare services, participation in rehabilitation care has become a significant challenge for them. Consequently, it increases the burden of stroke disability. Therefore, this study aimed to measu...
The terminal Neoproterozoic Era (850-542 Ma) is characterized by the most pronounced positive sulfur isotope ((34)S/(32)S) excursions in Earth's history, with strong variability and maximum values averaging δ(34)S∼+38‰. These excursions have been mostly interpreted in the framework of steady-state models, in which ocean sulfate concentrations do not fluctuate (that is, sulfate input equals sulf...
We study how spatial constraints are reflected in the percolation properties of networks embedded in one-dimensional chains and two-dimensional lattices. We assume longrange connections between sites on the lattice where two sites at distance r are chosen to be linked with probability p(r)∼ r−δ. Similar distributions have been found in spatially embedded real networks such as social and airline...
1 Discrepancy principle for the dynamical systems method Abstract Assume that Au = f, (1) is a solvable linear equation in a Hilbert space, ||A|| < ∞, and R(A) is not closed, so problem (1) is ill-posed. Here R(A) is the range of the linear operator A. A DSM (dynamical systems method) for solving (1), consists of solving the following Cauchy problem: ˙ u = −u + (B + (t)) −1 A * f, u(0) = u 0 , ...
In a three-year (2004-2006), field experiment, we aimed to study changes in leaf physiological traits (leaf water potential-Ψleaf, leaf water content-LWC, carbon isotope discrimination-Δ, specific leaf area-SLA, chlorophyll content as assessed by SPAD and modified SPAD-MSPAD) and elemental composition (K, Na, Ca, Mg, K/Na, Ca/Mg, total leaf salinity-TLS) of sugar beets (cv. Rizor) grown unde...
In order to reduce the operating temperature of solid oxide fuel cells (SOFCs), novel electrolyte materials based on CeO2 and BaCeO3 are being developed in the scientific realm. In this context, we propose a new methodology for preparing the nano-ceramic composite materials such as BaCe0.9Gd0.9O3-δ – Ce0.9Gd0.9O2-δ (BCGO–CGO) and BaCe0.8Sm0.2O3-δ – Ce0.8Sm0.2O2-δ (BCSO – CSO) as possible elec...
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