The Experts below are selected from a list of 95181 Experts worldwide ranked by ideXlab platform
Hiroshi Hirai - One of the best experts on this subject based on the ideXlab platform.
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Uniform semimodular lattices and valuated matroids
Journal of Combinatorial Theory Series A, 2019Co-Authors: Hiroshi HiraiAbstract:Abstract In this paper, we present a lattice-theoretic characterization for valuated matroids, which is an extension of the well-known cryptomorphic equivalence between matroids and geometric lattices (= atomistic semimodular lattices). We introduce a class of semimodular lattices, called uniform semimodular lattices, and establish a cryptomorphic equivalence between integer-valued valuated matroids and uniform semimodular lattices. Our result includes a coordinate-free lattice-theoretic characterization of integer points in tropical linear spaces, incorporates the Dress-Terhalle Completion Process of valuated matroids, and establishes a smooth connection with Euclidean buildings of type A.
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Uniform semimodular lattice and valuated matroid
arXiv: Combinatorics, 2018Co-Authors: Hiroshi HiraiAbstract:In this paper, we present a lattice-theoretic characterization for valuated matroids, which is an extension of the well-known cryptomorphic equivalence between matroids and geometric lattices ($=$ atomistic semimodular lattices). We introduce a class of semimodular lattices, called uniform semimodular lattices, and establish a cryptomorphic equivalence between integer-valued valuated matroids and uniform semimodular lattices. Our result includes a coordinate-free lattice-theoretic characterization of integer points in tropical linear spaces, incorporates the Dress-Terhalle Completion Process of valuated matroids, and establishes a smooth connection with Euclidean buildings of type A.
Chris Steinhoff - One of the best experts on this subject based on the ideXlab platform.
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Integration of Multicomponent Processing and Interpretation of the Pouce Coupe Time-Lapse Survey: Focus on Shear-Wave Splitting Analysis
SEG Technical Program Expanded Abstracts 2013, 2013Co-Authors: Jeff P. Grossman, Gulia Popov, Chris SteinhoffAbstract:Multicomponent seismic Processing and interpretation have become disconnected in industry practice, hindering the ability to extract meaningful reservoir characterization conclusions. Integrating seismic Processing with the final interpretation goals elevates seismic characterization and drives advancements in Processing algorithms. The focus of this study was on seismic characterization using convertedwaves (C-waves) because of their high sensitivity to the azimuthal anisotropy caused by preferential fractures and differential stress, and ultimately because they provide a method of correlating hydraulic stimulation success to the enhanced permeability pathways created in the hydraulic Completion Process.
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Integration of multicomponent time-lapse Processing and interpretation: Focus on shear-wave splitting analysis
The Leading Edge, 2013Co-Authors: Jeff P. Grossman, Gulia Popov, Chris SteinhoffAbstract:Multicomponent seismic Processing and interpretation have become disconnected in industry practice, hindering the ability to extract meaningful reservoir characterization conclusions. Integrating seismic Processing with the final interpretation goals elevates the overall characterization that can be performed, and drives advancements in Processing algorithms. The focus of this study is on converted-waves because of their high sensitivity to the azimuthal anisotropy caused by preferential fractures and differential stress, and ultimately because they provide a method of correlating hydraulic stimulation success to the enhanced permeability pathways created in the hydraulic Completion Process.
Eckhard Klieme - One of the best experts on this subject based on the ideXlab platform.
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the time on task effect in reading and problem solving is moderated by task difficulty and skill insights from a computer based large scale assessment
Journal of Educational Psychology, 2014Co-Authors: Frank Goldhammer, Johannes Naumann, Annette Stelter, Krisztina Toth, Heiko Rolke, Eckhard KliemeAbstract:Computer-based assessment can provide new insights into behavioral Processes of task Completion that cannot be uncovered by paper-based instruments. Time presents a major characteristic of the task Completion Process. Psychologically, time on task has 2 different interpretations, suggesting opposing associations with task outcome: Spending more time may be positively related to the outcome as the task is completed more carefully. However, the relation may be negative if working more fluently, and thus faster, reflects higher skill level. Using a dual Processing theory framework, the present study argues that the validity of each assumption is dependent on the relative degree of controlled versus routine cognitive Processing required by a task, as well as a person’s acquired skill. A total of 1,020 persons ages 16 to 65 years participated in the German field test of the Programme for the International Assessment of Adult Competencies. Test takers completed computer-based reading and problem solving tasks. As revealed by linear mixed models, in problem solving, which required controlled Processing, the time on task effect was positive and increased with task difficulty. In reading tasks, which required more routine Processing, the time on task effect was negative and the more negative, the easier a task was. In problem solving, the positive time on task effect decreased with increasing skill level. In reading, the negative time on task effect increased with increasing skill level. These heterogeneous effects suggest that time on task has no uniform interpretation but is a function of task difficulty and individual skill.
Jeff P. Grossman - One of the best experts on this subject based on the ideXlab platform.
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Integration of Multicomponent Processing and Interpretation of the Pouce Coupe Time-Lapse Survey: Focus on Shear-Wave Splitting Analysis
SEG Technical Program Expanded Abstracts 2013, 2013Co-Authors: Jeff P. Grossman, Gulia Popov, Chris SteinhoffAbstract:Multicomponent seismic Processing and interpretation have become disconnected in industry practice, hindering the ability to extract meaningful reservoir characterization conclusions. Integrating seismic Processing with the final interpretation goals elevates seismic characterization and drives advancements in Processing algorithms. The focus of this study was on seismic characterization using convertedwaves (C-waves) because of their high sensitivity to the azimuthal anisotropy caused by preferential fractures and differential stress, and ultimately because they provide a method of correlating hydraulic stimulation success to the enhanced permeability pathways created in the hydraulic Completion Process.
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Integration of multicomponent time-lapse Processing and interpretation: Focus on shear-wave splitting analysis
The Leading Edge, 2013Co-Authors: Jeff P. Grossman, Gulia Popov, Chris SteinhoffAbstract:Multicomponent seismic Processing and interpretation have become disconnected in industry practice, hindering the ability to extract meaningful reservoir characterization conclusions. Integrating seismic Processing with the final interpretation goals elevates the overall characterization that can be performed, and drives advancements in Processing algorithms. The focus of this study is on converted-waves because of their high sensitivity to the azimuthal anisotropy caused by preferential fractures and differential stress, and ultimately because they provide a method of correlating hydraulic stimulation success to the enhanced permeability pathways created in the hydraulic Completion Process.
Frank Goldhammer - One of the best experts on this subject based on the ideXlab platform.
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the time on task effect in reading and problem solving is moderated by task difficulty and skill insights from a computer based large scale assessment
Journal of Educational Psychology, 2014Co-Authors: Frank Goldhammer, Johannes Naumann, Annette Stelter, Krisztina Toth, Heiko Rolke, Eckhard KliemeAbstract:Computer-based assessment can provide new insights into behavioral Processes of task Completion that cannot be uncovered by paper-based instruments. Time presents a major characteristic of the task Completion Process. Psychologically, time on task has 2 different interpretations, suggesting opposing associations with task outcome: Spending more time may be positively related to the outcome as the task is completed more carefully. However, the relation may be negative if working more fluently, and thus faster, reflects higher skill level. Using a dual Processing theory framework, the present study argues that the validity of each assumption is dependent on the relative degree of controlled versus routine cognitive Processing required by a task, as well as a person’s acquired skill. A total of 1,020 persons ages 16 to 65 years participated in the German field test of the Programme for the International Assessment of Adult Competencies. Test takers completed computer-based reading and problem solving tasks. As revealed by linear mixed models, in problem solving, which required controlled Processing, the time on task effect was positive and increased with task difficulty. In reading tasks, which required more routine Processing, the time on task effect was negative and the more negative, the easier a task was. In problem solving, the positive time on task effect decreased with increasing skill level. In reading, the negative time on task effect increased with increasing skill level. These heterogeneous effects suggest that time on task has no uniform interpretation but is a function of task difficulty and individual skill.