The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform

Kunfeng Chen - One of the best experts on this subject based on the ideXlab platform.

  • Ex situ identification of the Cu+ long-Range Diffusion path of a Cu-based anode for lithium ion batteries
    Physical Chemistry Chemical Physics, 2014
    Co-Authors: Kunfeng Chen
    Abstract:

    An ex situ observation was made by XRD patterns, SEM and TEM images, as well as cyclic voltammogram curves of CuO/Cu integrated anodes for lithium ion batteries. For the first time, the existence of a Cu+ ion long-Range transfer path was identified at the potential widow of 1.30–1.60 V during both charging and discharging processes. Both SEM and TEM images show that these nanowires networks hanging CuO nanoparticles provide a Cu+ Diffusion path within our designed CuO/Cu integrated anode. This work provides new insights into the conversion reaction of inorganic anode materials, and can favor the development of high-performance conversion anodes for lithium-ion batteries.

  • ex situ identification of the cu long Range Diffusion path of a cu based anode for lithium ion batteries
    Physical Chemistry Chemical Physics, 2014
    Co-Authors: Kunfeng Chen
    Abstract:

    An ex situ observation was made by XRD patterns, SEM and TEM images, as well as cyclic voltammogram curves of CuO/Cu integrated anodes for lithium ion batteries. For the first time, the existence of a Cu+ ion long-Range transfer path was identified at the potential widow of 1.30–1.60 V during both charging and discharging processes. Both SEM and TEM images show that these nanowires networks hanging CuO nanoparticles provide a Cu+ Diffusion path within our designed CuO/Cu integrated anode. This work provides new insights into the conversion reaction of inorganic anode materials, and can favor the development of high-performance conversion anodes for lithium-ion batteries.

Mark S. Conradi - One of the best experts on this subject based on the ideXlab platform.

  • The Role of Collateral Paths in Long-Range Diffusion of 3He in Lungs
    Academic Radiology, 2008
    Co-Authors: Mark S. Conradi, Dmitriy A. Yablonskiy, Jason C. Woods, David S. Gierada, Seth-emil T. Bartel, Susan E. Haywood, Christopher Menard
    Abstract:

    Rationale and Objectives The hyperpolarized 3 He long-Range Diffusion coefficient (LRDC) in lungs is sensitive to changes in lung structure due to emphysema, reflecting the increase in collateral paths resulting from tissue destruction. However, no clear understanding of LRDC in healthy lungs has emerged. Here we compare LRDC measured in healthy lungs with computer simulations of Diffusion along the airway tree with no collateral connections. Materials and Methods Computer simulations of Diffusion of spatially modulated spin magnetization were performed in computer-generated, symmetric-branching models of lungs and compared with existing LRDC measurements in canine and human lungs. Results The simulations predict LRDC values of order 0.001 cm 2 /sec, approximately 20 times smaller than the measured LRDC. We consider and rule out possible mechanisms for LRDC not included in the simulations: incomplete breath hold, cardiac motion, and passage of dissolved 3 He through airway walls. However, a very low density of small (micron) holes in the airways is shown to account for the observed LRDC. Conclusion It is proposed that LRDC in healthy lungs is determined by small collateral pathways.

  • role of collateral paths in long Range Diffusion in lungs
    Journal of Applied Physiology, 2008
    Co-Authors: Seth-emil T. Bartel, Dmitriy A. Yablonskiy, Jason C. Woods, David S. Gierada, Susan E. Haywood, Christopher Menard, Yulin V Chang, Mark S. Conradi
    Abstract:

    The long-Range apparent Diffusion coefficient (LRADC) of 3He gas in lungs, measured over times of several seconds and distances of 1–3 cm, probes the connections between the airways. Previous work ...

  • long Range Diffusion of hyperpolarized 3he in explanted normal and emphysematous human lungs via magnetization tagging
    Journal of Applied Physiology, 2005
    Co-Authors: Jason C. Woods, Mark S. Conradi, Dmitriy A. Yablonskiy, Cliff Khuat Chye Choong, Kimiaki Chino, John A Pierce, James C Hogg, John Bentley, Joel D Cooper, Peter T Macklem
    Abstract:

    Long-Range diffusivity of hyperpolarized 3He gas was measured from the decay rate of sinusoidally modulated longitudinal nuclear magnetization in three normal donor and nine severely emphysematous ...

Jason C. Woods - One of the best experts on this subject based on the ideXlab platform.

  • The Role of Collateral Paths in Long-Range Diffusion of 3He in Lungs
    Academic Radiology, 2008
    Co-Authors: Mark S. Conradi, Dmitriy A. Yablonskiy, Jason C. Woods, David S. Gierada, Seth-emil T. Bartel, Susan E. Haywood, Christopher Menard
    Abstract:

    Rationale and Objectives The hyperpolarized 3 He long-Range Diffusion coefficient (LRDC) in lungs is sensitive to changes in lung structure due to emphysema, reflecting the increase in collateral paths resulting from tissue destruction. However, no clear understanding of LRDC in healthy lungs has emerged. Here we compare LRDC measured in healthy lungs with computer simulations of Diffusion along the airway tree with no collateral connections. Materials and Methods Computer simulations of Diffusion of spatially modulated spin magnetization were performed in computer-generated, symmetric-branching models of lungs and compared with existing LRDC measurements in canine and human lungs. Results The simulations predict LRDC values of order 0.001 cm 2 /sec, approximately 20 times smaller than the measured LRDC. We consider and rule out possible mechanisms for LRDC not included in the simulations: incomplete breath hold, cardiac motion, and passage of dissolved 3 He through airway walls. However, a very low density of small (micron) holes in the airways is shown to account for the observed LRDC. Conclusion It is proposed that LRDC in healthy lungs is determined by small collateral pathways.

  • role of collateral paths in long Range Diffusion in lungs
    Journal of Applied Physiology, 2008
    Co-Authors: Seth-emil T. Bartel, Dmitriy A. Yablonskiy, Jason C. Woods, David S. Gierada, Susan E. Haywood, Christopher Menard, Yulin V Chang, Mark S. Conradi
    Abstract:

    The long-Range apparent Diffusion coefficient (LRADC) of 3He gas in lungs, measured over times of several seconds and distances of 1–3 cm, probes the connections between the airways. Previous work ...

  • long Range Diffusion of hyperpolarized 3he in explanted normal and emphysematous human lungs via magnetization tagging
    Journal of Applied Physiology, 2005
    Co-Authors: Jason C. Woods, Mark S. Conradi, Dmitriy A. Yablonskiy, Cliff Khuat Chye Choong, Kimiaki Chino, John A Pierce, James C Hogg, John Bentley, Joel D Cooper, Peter T Macklem
    Abstract:

    Long-Range diffusivity of hyperpolarized 3He gas was measured from the decay rate of sinusoidally modulated longitudinal nuclear magnetization in three normal donor and nine severely emphysematous ...

Gideon Amir - One of the best experts on this subject based on the ideXlab platform.

  • one dimensional long Range Diffusion limited aggregation i
    Annals of Probability, 2016
    Co-Authors: Gideon Amir, Omer Angel, Itai Benjamini, Gady Kozma
    Abstract:

    We examine Diffusion-limited aggregation generated by a random walk on ZZ with long jumps. We derive upper and lower bounds on the growth rate of the aggregate as a function of the number of moments a single step of the walk has. Under various regularity conditions on the tail of the step distribution, we prove that the diameter grows as nβ+o(1)nβ+o(1), with an explicitly given ββ. The growth rate of the aggregate is shown to have three phase transitions, when the walk steps have finite third moment, finite variance, and conjecturally, finite half moment.

  • One-dimensional long-Range Diffusion Limited Aggregation II: the transient case
    arXiv: Probability, 2013
    Co-Authors: Gideon Amir, Omer Angel, Gady Kozma
    Abstract:

    We examine Diffusion-limited aggregation for a one-dimensional random walk with long jumps. We achieve upper and lower bounds on the growth rate of the aggregate as a function of the number of moments a single step of the walk has. In this paper we handle the case of transient walks.

  • One-dimensional long-Range Diffusion-limited aggregation III -- The limit aggregate
    arXiv: Probability, 2009
    Co-Authors: Gideon Amir
    Abstract:

    In this paper we study the structure of the limit aggregate $A_\infty = \bigcup_{n\geq 0} A_n$ of the one-dimensional long Range Diffusion limited aggregation process defined in [AABK09]. We show (under some regularity conditions) that for walks with finite third moment $A_\infty$ has renewal structure and positive density, while for walks with finite variance the renewal structure no longer exists and $A_\infty$ has 0 density. We define a tree structure on the aggregates and show some results on the degrees and number of ends of these random trees. We introduce a new "harmonic competition" model where different colours compete for harmonic measure, and show how the tree structure is related to coexistence in this model.

  • one dimensional long Range Diffusion limited aggregation i
    arXiv: Probability, 2009
    Co-Authors: Gideon Amir, Omer Angel, Itai Benjamini, Gady Kozma
    Abstract:

    We examine Diffusion-limited aggregation generated by a random walk on Z with long jumps. We derive upper and lower bounds on the growth rate of the aggregate as a function of the number moments a single step of the walk has. Under various regularity conditions on the tail of the step distribution, we prove that the diameter grows as n^{beta+o(1)}, with an explicitly given beta. The growth rate of the aggregate is shown to have three phase transitions, when the walk steps have finite third moment, finite variance, and, conjecturally, finite half moment.

Dmitriy A. Yablonskiy - One of the best experts on this subject based on the ideXlab platform.

  • The Role of Collateral Paths in Long-Range Diffusion of 3He in Lungs
    Academic Radiology, 2008
    Co-Authors: Mark S. Conradi, Dmitriy A. Yablonskiy, Jason C. Woods, David S. Gierada, Seth-emil T. Bartel, Susan E. Haywood, Christopher Menard
    Abstract:

    Rationale and Objectives The hyperpolarized 3 He long-Range Diffusion coefficient (LRDC) in lungs is sensitive to changes in lung structure due to emphysema, reflecting the increase in collateral paths resulting from tissue destruction. However, no clear understanding of LRDC in healthy lungs has emerged. Here we compare LRDC measured in healthy lungs with computer simulations of Diffusion along the airway tree with no collateral connections. Materials and Methods Computer simulations of Diffusion of spatially modulated spin magnetization were performed in computer-generated, symmetric-branching models of lungs and compared with existing LRDC measurements in canine and human lungs. Results The simulations predict LRDC values of order 0.001 cm 2 /sec, approximately 20 times smaller than the measured LRDC. We consider and rule out possible mechanisms for LRDC not included in the simulations: incomplete breath hold, cardiac motion, and passage of dissolved 3 He through airway walls. However, a very low density of small (micron) holes in the airways is shown to account for the observed LRDC. Conclusion It is proposed that LRDC in healthy lungs is determined by small collateral pathways.

  • role of collateral paths in long Range Diffusion in lungs
    Journal of Applied Physiology, 2008
    Co-Authors: Seth-emil T. Bartel, Dmitriy A. Yablonskiy, Jason C. Woods, David S. Gierada, Susan E. Haywood, Christopher Menard, Yulin V Chang, Mark S. Conradi
    Abstract:

    The long-Range apparent Diffusion coefficient (LRADC) of 3He gas in lungs, measured over times of several seconds and distances of 1–3 cm, probes the connections between the airways. Previous work ...

  • long Range Diffusion of hyperpolarized 3he in explanted normal and emphysematous human lungs via magnetization tagging
    Journal of Applied Physiology, 2005
    Co-Authors: Jason C. Woods, Mark S. Conradi, Dmitriy A. Yablonskiy, Cliff Khuat Chye Choong, Kimiaki Chino, John A Pierce, James C Hogg, John Bentley, Joel D Cooper, Peter T Macklem
    Abstract:

    Long-Range diffusivity of hyperpolarized 3He gas was measured from the decay rate of sinusoidally modulated longitudinal nuclear magnetization in three normal donor and nine severely emphysematous ...