Results 51 to 60 of about 1,574 (174)

Network Connectivity and Local Hydrology Drive DOM Composition in a Nonperennial Stream

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 5, May 2026.
Abstract Nonperennial streams are dynamic sites of biogeochemical processing, yet much remains to be learned about how hydrologic connectivity at different spatial and temporal scales impacts the composition of dissolved organic matter (DOM). We characterized spatial and temporal patterns of DOM composition in a nonperennial prairie stream network ...
Sarah M. Flynn, Rebecca L. Hale, Erin Seybold, Stephen Plont, Michelle Busch, Alexi Sommerville, Connor L. Brown, Amy J. Burgin   +7 more
wiley   +1 more source

Automated Spectral Deconvolution for Quantitative Dye Tracing

Water Resources Research, Volume 62, Issue 5, May 2026.
Abstract Dye tracing using fluorescent dyes is an essential tool for investigating flow path distribution, conduit networks, and connectivity in complex hydrogeologic systems, such as karst and fractured aquifers. The breakthrough curve, derived from the dye concentration measured at a downstream location with near‐continuous time resolution, provides ...
Fabian Quichimbo‐Miguitama, Seonkyoo Yoon, Jana Kramer, John D. Barry, Scott C. Alexander, Peter K. Kang   +5 more
wiley   +1 more source

Identifying the sources and sinks of CDOM/FDOM across the Mauritanian Shelf and their potential rolein the decomposition of Superoxide (O2-)

Frontiers in Marine Science, 2016
Superoxide (O2-) is a short lived reactive oxygen species (ROS) formed in seawater by photochemical or biological sources, it is important in the redox cycling of trace elements and organic matter in the ocean.
Maija Iris Heller, Maija Iris Heller, Kathrin Wuttig, Kathrin Wuttig, Peter Leslie Croot, Peter Leslie Croot   +5 more
doaj   +1 more source

Maximum Likelihood Solution to the Parafac Model

Behaviormetrika, 1987
The traditional factor analytic view of the PARAFAC model and its extension to a four mode situation with the derivation of the maximum likelihood estimation procedure by the generalized EM algorithm was presented. The four mode model was applied to six ASVAB data matrices defined by three specialty (clerical, mechanical, and electrical), times two ...
openaire   +1 more source

On Kruskal’s uniqueness condition for the Candecomp/Parafac decomposition

Linear Algebra and its Applications, 2007
The Candecomp/Parafac-decomposition of the real valued three-way array \(X\) is written as \(X=\underline{Y}^{(1)} + \ldots + \underline{Y}^{(R)} +\underline{E}\), where \(\underline{Y}^{(r)}\) are rank one arrays defined as outer products of three specified vectors and \(\underline E\) is a rest term.
Stegeman, A., Sidiropoulos, N. D.
openaire   +3 more sources

Fast adaptive PARAFAC decomposition algorithm with linear complexity [PDF]

2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2016
We present a fast adaptive PARAFAC decomposition algorithm with low computational complexity. The proposed algorithm generalizes the Orthonormal Projection Approximation Subspace Tracking (OPAST) approach for tracking a class of third-order tensors which have one dimension grow- ing with time.
Nguyen, Viet-Dung, Abed-Meraim, Karim, Nguyen, Linh-Trung   +2 more
openaire   +3 more sources

Interactions Between O‐Phospho‐L‐Serine and Trivalent Metal Ions: Studies in Solution and Solid State

European Journal of Inorganic Chemistry, Volume 29, Issue 10, 1 April 2026.
The interaction between the phosphorylated amino acid O‐phospho‐L‐serine and trivalent ions of f‐elements such as La3+, Eu3+, and Lu3+, supplemented by Y3+, has been studied in aqueous media. Nuclear magnetic resonance (NMR) spectroscopy in solution and in the solid state examined complex formation from the ligand perspective, while time‐resolved laser‐
Jonas Kunigkeit, Björn Drobot, Dominik Goldbach, Silvia Paasch, Gudrun Scholz, Thorsten Stumpf, Eike Brunner, Jerome Kretzschmar   +7 more
wiley   +1 more source

Fluorescence quantum yields of natural organic matter and organic compounds: Implications for the fluorescence-based interpretation of organic matter composition

Frontiers in Marine Science, 2015
Absorbance and fluorescence spectroscopy are economical tools for tracing the supply, turnover and fate of dissolved organic matter (DOM). The colored and fluorescent fractions of DOM (CDOM and FDOM, respectively) are linked by the apparent fluorescence ...
Urban Johannes Wünsch, Kathleen R Murphy, Colin Andrew Stedmon   +2 more
doaj   +1 more source

Multi-Aspect Incremental Tensor Decomposition Based on Distributed In-Memory Big Data Systems

Journal of Data and Information Science, 2020
We propose InParTen2, a multi-aspect parallel factor analysis three-dimensional tensor decomposition algorithm based on the Apache Spark framework. The proposed method reduces re-decomposition cost and can handle large tensors.
Yang Hye-Kyung, Yong Hwan-Seung
doaj   +1 more source

Continuous in situ monitoring provides new evidence of storm‐induced riverine hypoxia following climatic extremes

Limnology and Oceanography, Volume 71, Issue 4, April 2026.
Abstract June 2023, the warmest June on record at that point in the United Kingdom, was marked by an exceptional warm‐dry period followed by convective storms that triggered pronounced dissolved oxygen (DO) depletion across four river sites spanning a 25–5000 km2 basin gradient.
Hongzheng Zhu, Kieran Khamis, Rob Stevens, David M. Hannah, Stefan Krause   +4 more
wiley   +1 more source