Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 23 of 23

Full-Text Articles in Physical Sciences and Mathematics

A Nonparametric Method For Separating Photosynthesis And Respiration Components In Co2 Flux Measurements, Chuixiang Yi, Runze Li, Peter S. Backwin, Ankur Desai, Daniel M. Ricciuto, Sean P. Burns, Andrew A. Turnipseed, Steven C. Wofsy, J. William Munger, Kell Wilson, Russell K. Monson Sep 2004

A Nonparametric Method For Separating Photosynthesis And Respiration Components In Co2 Flux Measurements, Chuixiang Yi, Runze Li, Peter S. Backwin, Ankur Desai, Daniel M. Ricciuto, Sean P. Burns, Andrew A. Turnipseed, Steven C. Wofsy, J. William Munger, Kell Wilson, Russell K. Monson

Publications and Research

Future climate change is expected to affect ecosystem-atmosphere CO2 exchange, particularly through the influence of temperature. To date, however, few studies have shown that differences in the response of net ecosystem CO2 exchange (NEE) to temperature among ecosystems can be explained by differences in the photosynthetic and respiratory processes that compose NEE. Using a new nonparametric statistical model, we analyzed data from four forest ecosystems. We observed that differences among forests in their ability to assimilate CO2 as a function of temperature were attributable to consistent differences in the temperature dependence of photosynthesis and respiration. This observation …


The Observed Covariance Between Ecosystem Carbon Exchange And Atmospheric Boundary Layer Dynamics At A Site In Northern Wisconsin, Chuixiang Yi, Kenneth J. Davis, Peter S. Bakwin, A. Scott Denning, Nina Zhang, Ankur Desai, John C. Lin, Christoph Gerbig Apr 2004

The Observed Covariance Between Ecosystem Carbon Exchange And Atmospheric Boundary Layer Dynamics At A Site In Northern Wisconsin, Chuixiang Yi, Kenneth J. Davis, Peter S. Bakwin, A. Scott Denning, Nina Zhang, Ankur Desai, John C. Lin, Christoph Gerbig

Publications and Research

Ecosystem CO2 exchange and atmosphere boundary layer (ABL) mixing are correlated diurnally and seasonally as they are both driven by solar insulation. Tracer transport models predict that these covariance signals produce a meridional gradient of annual mean CO2 concentration in the marine boundary layer that is half as strong as the signal produced by fossil fuel emissions. This rectifier effect is simulated by most global tracer transport models. However, observations to constrain the strength of these covariance signals in nature are lacking. We investigate the covariance between ecosystem carbon dioxide exchange and ABL dynamics by comparing one widely …


Tr-2004001: Tableaux For The Logic Of Proofs, Bryan Renne Jan 2004

Tr-2004001: Tableaux For The Logic Of Proofs, Bryan Renne

Computer Science Technical Reports

No abstract provided.


Tr-2004002: Oopn: An Object-Oriented Petri Nets And Its Integrated Development Environment, Jinzhong Niu, Jing Zou, Aihua Ren Jan 2004

Tr-2004002: Oopn: An Object-Oriented Petri Nets And Its Integrated Development Environment, Jinzhong Niu, Jing Zou, Aihua Ren

Computer Science Technical Reports

No abstract provided.


Tr-2004004: Implementing And Automating Basic Number Theory In Metaprl Proof Assistant, Yegor Bryukhov, Alexei Kopylov, Vladimir Krupski, Aleksey Nogin Jan 2004

Tr-2004004: Implementing And Automating Basic Number Theory In Metaprl Proof Assistant, Yegor Bryukhov, Alexei Kopylov, Vladimir Krupski, Aleksey Nogin

Computer Science Technical Reports

No abstract provided.


Tr-2004010: Optimal Reversible Quantum Circuit For Multiplication, Anh Quoc Nguyen Jan 2004

Tr-2004010: Optimal Reversible Quantum Circuit For Multiplication, Anh Quoc Nguyen

Computer Science Technical Reports

No abstract provided.


Tr-2004009: A Reduction Of The Matrix Eigenproblem To Polynomial Rootfinding Via Similarity Transforms Into Arrow-Head Matrices, Victor Y. Pan Jan 2004

Tr-2004009: A Reduction Of The Matrix Eigenproblem To Polynomial Rootfinding Via Similarity Transforms Into Arrow-Head Matrices, Victor Y. Pan

Computer Science Technical Reports

No abstract provided.


Tr-2004011: Logic Of Knowledge With Justifications From The Provability Perspective, Sergei Artemov, Elena Nogina Jan 2004

Tr-2004011: Logic Of Knowledge With Justifications From The Provability Perspective, Sergei Artemov, Elena Nogina

Computer Science Technical Reports

No abstract provided.


Tr-2004012: Single-Hop Probing Asymptotics In Available Bandwidth Estimation: Sample-Path Analysis, Xiliang Liu, Kaliappa Ravindran, Benyuan Liu, Dmitri Loguinov Jan 2004

Tr-2004012: Single-Hop Probing Asymptotics In Available Bandwidth Estimation: Sample-Path Analysis, Xiliang Liu, Kaliappa Ravindran, Benyuan Liu, Dmitri Loguinov

Computer Science Technical Reports

No abstract provided.


Tr-2004007: Optimal Reversible Quantum Circuit For Multiplication, Anh Quoc Nguyen Jan 2004

Tr-2004007: Optimal Reversible Quantum Circuit For Multiplication, Anh Quoc Nguyen

Computer Science Technical Reports

No abstract provided.


Tr-2004016: Semantics And Tableaus For Lps4, Melvin Fitting Jan 2004

Tr-2004016: Semantics And Tableaus For Lps4, Melvin Fitting

Computer Science Technical Reports

No abstract provided.


Tr-2004019: Quantified Lp, Melvin Fitting Jan 2004

Tr-2004019: Quantified Lp, Melvin Fitting

Computer Science Technical Reports

No abstract provided.


Tr-2004003: Intuitionistic Logic With Classical Atoms, Hidenori Kurokawa Jan 2004

Tr-2004003: Intuitionistic Logic With Classical Atoms, Hidenori Kurokawa

Computer Science Technical Reports

No abstract provided.


Tr-2004005: A Parallel Monte Carlo Simulation Of Five-Dimensional Hyperspheres Using A Webcomputing Framework, P. A. Whitlock, Marvin Bishop, Dino Klein Jan 2004

Tr-2004005: A Parallel Monte Carlo Simulation Of Five-Dimensional Hyperspheres Using A Webcomputing Framework, P. A. Whitlock, Marvin Bishop, Dino Klein

Computer Science Technical Reports

No abstract provided.


Tr-2004006: A Coordinate Ascent Approach To Tomographic Reconstruction Of Label Images From A Few Projections, Hstau Y. Liao, Gabor T. Harman Jan 2004

Tr-2004006: A Coordinate Ascent Approach To Tomographic Reconstruction Of Label Images From A Few Projections, Hstau Y. Liao, Gabor T. Harman

Computer Science Technical Reports

No abstract provided.


Tr-2004008: Simultaneous Fuzzy Segmentation Of Multiple Objects, Bruno M. Carvalho, Gabor T. Herman, T. Yung Kong Jan 2004

Tr-2004008: Simultaneous Fuzzy Segmentation Of Multiple Objects, Bruno M. Carvalho, Gabor T. Herman, T. Yung Kong

Computer Science Technical Reports

No abstract provided.


Tr-2004013: Toeplitz And Hankel Meet Hensel And Newton: Nearly Optimal Algorithms And Their Practical Acceleration With Saturated Initialization, Victor Y. Pan, Brian Murphy, Rhys E. Rosholt, Xinmao Wang Jan 2004

Tr-2004013: Toeplitz And Hankel Meet Hensel And Newton: Nearly Optimal Algorithms And Their Practical Acceleration With Saturated Initialization, Victor Y. Pan, Brian Murphy, Rhys E. Rosholt, Xinmao Wang

Computer Science Technical Reports

No abstract provided.


Tr-2004014: A Homotopic/Factorization Process For Toeplitz-Like Matrices With Newton's/Conjugate Gradient Stages, Victor Y. Pan Jan 2004

Tr-2004014: A Homotopic/Factorization Process For Toeplitz-Like Matrices With Newton's/Conjugate Gradient Stages, Victor Y. Pan

Computer Science Technical Reports

No abstract provided.


Tr-2004015: Superfast Algorithms For Singular Toeplitz-Like Matrices, Victor Y. Pan Jan 2004

Tr-2004015: Superfast Algorithms For Singular Toeplitz-Like Matrices, Victor Y. Pan

Computer Science Technical Reports

No abstract provided.


Tr-2004017: Towards A Formal Concept Analysis Approach To Exploring Communities On The World Wide Web, Jayson E. Rome, Robert M. Haralick Jan 2004

Tr-2004017: Towards A Formal Concept Analysis Approach To Exploring Communities On The World Wide Web, Jayson E. Rome, Robert M. Haralick

Computer Science Technical Reports

No abstract provided.


Tr-2004018: Evidence-Based Common Knowledge, Sergei Artemov Jan 2004

Tr-2004018: Evidence-Based Common Knowledge, Sergei Artemov

Computer Science Technical Reports

No abstract provided.


Biospeleologists, Aldemaro Romero Jr. Jan 2004

Biospeleologists, Aldemaro Romero Jr.

Publications and Research

No abstract provided.


The Mutamathil Type Style: Towards Free, Technology-Friendly, Arabetic Types, Saad D. Abulhab Jan 2004

The Mutamathil Type Style: Towards Free, Technology-Friendly, Arabetic Types, Saad D. Abulhab

Publications and Research

Efforts to adapt various Arabetic scripts to the machine are as old as the field of typography. But most of these efforts concentrated primarily on forcing the machine to duplicate the Arabetic handwritten forms. Others have practically advocated divorce from the calligraphic tradition rather than enrichment and reform. One reason why the few modern attempts to typographically solve the technology-induced Arabetic script problems had failed is that many typeforms (or many times just theoretical calligraphy style) was presented as replacement for the traditional ones rather than as optional working types. New “controversial” types should be made widely available for users …