Published      

 

Macroscopic consequences of calcium signaling in microdomains: a first passage time approach

with Robert Rovetti, Kunal Das, and Alan Garfinkel 

To apear in PRE. 

Modifying L-type Calcium Current Kinetics as a Novel Antifibrilatory Strategy.

Aman Mahajan*, Yohannes Shiferaw*, Lai-Hua Xie, Riccardo Olcese, Ali Baher, Jim Yang, Alain Karma, Peng-Sheng Chen, Alan Garfinkel, Zhilin Qu, and James N. Weiss.   (accepted for publication at Biophysical Journal).

(*shared first authorship)

Influence of L-Type Ca2+ Channel Subunit Composition on Rates of Inactivation and Recovery of the Ca2+ Conductance:  Implications for Novel Anti-fibrillatory Therapy

      Vadym Gudzenko *, Yohannes Shiferaw *, Nicoleta Savali, Roshni Vyas, James N. Weiss and Riccardo Olcese.   (shared first authorship)

Accepted for publication in the  American Journal of Physiology   

A Rabbit Ventricular Action Potential Model Replicating Cardiac Dynamics at Rapid Heart Rates.

Aman Mahajan*, Yohannes Shiferaw*, Lai-Hua Xie, Riccardo Olcese, Ali Baher, Jim Yang, Alain Karma, Peng-Sheng Chen, Alan Garfinkel, Zhilin Qu, and James N. Weiss.   (submitted for publication at Biophysical Journal).

            Biophys. J. ; Published ahead of print on May 4, 2007 as doi:10.1529/biophysj.106.098160

Nonlinear dynamics of cardiac excitation-contraction coupling: an iterated map study

Physical Review E 75, 011927  (2007)

with Zhilin Qu and James N. Weiss

Inferring the Cellular Origin of Voltage and Calcium Alternans From the Spatial Scales of Phase Reversal During Discordant Alternans

Biophysical Journal Letters, Dec. 15, (2006).

Nonlinear Dynamics of Paced Cardiac Cells

Ann. N.Y. Acad. Sci. 1080:376-394 (2006)

Yohannes Shiferaw, Alain Karma, Zhilin Qu, Alan Garfinkel, James N. Weiss, Annals of the New York Academy of Sciences (review article)

Dynamic Origin of Spatially Discordant Alternans in Cardiac Tissue

Biophys J. 2006 Oct 27

Hideki Hayashi*, Yohannes Shiferaw*, Daisuke Sato,  Motoki Nihei, Shien-Fong Lin,, Peng-Sheng Chen, Alan Garfinkel, James N. Weiss, Zhilin Qu  (Biophysical Journal)

(*shared first authorship)

Spatially discordant alternans in cardiac tissue: role of calcium cycling.

Sato D*, Shiferaw Y*, Garfinkel A, Weiss JN, Qu Z, Karma A.

Circ Res. 2006 Sep 1;99(5):520-7. Epub 2006 Aug 10. (*shared first authorship)

 

Turing instability mediated by voltage and calcium diffusion in paced cardiac cells.

Shiferaw Y, Karma A.

Proc Natl Acad Sci U S A. 2006 Apr 11;103(15):5670-5. Epub 2006 Mar 30.

 

From pulsus to pulseless: the saga of cardiac alternans.

Weiss JN, Karma A, Shiferaw Y, Chen PS, Garfinkel A, Qu Z.
Circ Res. 2006 May 26;98(10):1244-53. Review.

Coupled dynamics of voltage and calcium in paced cardiac cells.

Shiferaw Y, Sato D, Karma A.

Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Feb;71(2 Pt 1):021903. Epub 2005 Feb 8.

Model of intracellular calcium cycling in ventricular myocytes.

Shiferaw Y, Watanabe MA, Garfinkel A, Weiss JN, Karma A.

Biophys J. 2003 Dec;85(6):3666-86.

Publications in disordered systems

 1. cond-mat/0411195 [abs, ps, pdf, other] :
Title: Localization of Polymers in Random Media: Analogy with Quantum Particles in Disorder
Authors: Yadin Y. Goldschmidt, Yohannes Shiferaw
Comments: To be published as a book chapter in "Statistics of Linear Polymers in Disordered Media", edited by B.K. Chakrabarti, Elsevier 2005

          See Rudy Podgornik's review (in the Journal of Statistical Physics) of this book chapter. 


2. cond-mat/0207505 [abs, ps, pdf, other] :
Title: Polymers with self-avoiding interaction in random media: a localization-delocalization transition
Authors: Yadin Y. Goldschmidt, Yohannes Shiferaw
Comments: 20 pages, 2 figures, revtex4
Subj-class: Disordered Systems and Neural Networks
 
3. cond-mat/0109015 [abs, ps, pdf, other] :
Title: Localization of polymers in a finite medium with fixed random obstacles
Authors: Yadin Y. Goldschmidt, Yohannes Shiferaw
Comments: 23 pages, 3 figures, revtex
Subj-class: Disordered Systems and Neural Networks
 
4. cond-mat/0011064 [abs, ps, pdf, other] :
Title: Localization of a polymer in random media: Relation to the localization of a quantum particle
Authors: Yohannes Shiferaw, Yadin Y. Goldschmidt
Comments: RevTex, 44 pages, 13 figures
Subj-class: Disordered Systems and Neural Networks; Soft Condensed Matter
 
5. cond-mat/0003136 [abs, ps, pdf, other] :
Title: Solvable model of a polymer in random media with long ranged disorder correlations
Authors: Yohannes Shiferaw, Yadin Y. Goldschmidt (University of Pittsburgh)
Comments: REVTeX, 28 pages, 12 figures in eps format
Subj-class: Disordered Systems and Neural Networks; Statistical Mechanics
 

Undergraduate research

Gregory S. Adkins and Yohannes Shiferaw

Two-loop corrections to the orthopositronium and parapositronium decay rates due to vacuum polarization

Phys. Rev. A 52, 2442–2445 (1995) [Issue 3 – September 1995 ]

Calvin Stubins, Kunal Das, and Yohannes Shiferaw

Low-lying energy levels of the hydrogen atom in a strong magnetic field

J. Phys. B: At. Mol. Opt. Phys. 37 2201-2209

 

 

 

Publications