2017-2024

98. Qiu D and Azadani AN. Enhancing Transcatheter Aortic Valve Design to Mitigate the Risk of Subclinical Leaflet Thrombosis.. Journal of the American College of Cardiology 84 (18_Supplement), B406-B406 (2024).

97. Briansky JT, Qiu D, and Azadani AN. Laser Ablation: A Novel Approach to Mitigate Coronary Obstruction and Maintain Coronary Access in Transcatheter Aortic Valve Replacement Procedures.. Journal of the American College of Cardiology 84 (18_Supplement), B344-B344 (2024).

96. Qiu D and Azadani AN. TCT-951 Is the Pinwheeling Index a Potential Surrogate for Accelerated Leaflet Failure in Transcatheter Heart Valves?. Journal of the American College of Cardiology 84 (18_Supplement), B405-B405. (2024)

95. Clinkenbeard B, Bauer H, Corr E, Qiu D, Anzellini F, Anzellini N, and Azadani AN. Design, Fabrication, and Testing of a High-Efficiency Left Atrium Unloading Device. Circulation 150 (Suppl_1), A4142998-A4142998 (2024).

94. Qiu D and Azadani AN. Optimizing Transcatheter Aortic Valve Design to Mitigate Subclinical Leaflet Thrombosis. Circulation 150 (Suppl_1), A4142998-A4142998 (2024).

93. Briansky JT, Qiu D, and Azadani AN. Laser Ablation to Prevent Coronary Obstruction and Sustain Coronary Access in redo-TAVR: a Feasibility Study . Circulation 150 (Suppl_1), A4141954-A4141954 (2024).

92. Qiu D and Azadani AN. Subclinical Leaflet Thrombosis in Transcatheter Aortic Valves: Insights of Local Hemodynamics and the importance of Leaflet Design. MechBio Symposium - Boulder Colorado (2024).

91. Clinkenbeard B and Azadani AN. Computational Fluid Dynamics and Fluid Structure Interaction Modeling in Healthy Vertebral Arteries: A Comparative Study. MechBio Symposium - Boulder Colorado (2024).

90. Briansky JT, Qiu D, and Azadani AN. Laser Ablation as a Novel Approach to Mitigate Coronary Obstruction and Maintain Coronary Access in Transcatheter Aortic Valve Replacement. MechBio Symposium - Boulder Colorado - Award-Winning Abstract (2024).

89. Said A and Azadani AN. Effects of Alcohol Septal Ablation on the Mechanical Properties of Myocardium. MechBio Symposium - Boulder Colorado  - Award-Winning Abstract (2024).

88. Briansky JT, Sadipour M, and Azadani AN. Laser Ablation: A New Leaflet Modification Strategy to Prevent Coronary Obstruction in Redo TAVR. Summer Biomechanics, Bioengineering, and Biotransport Conference (2023).

87. Sadipour M, Azadani AN. Fluid-Structure Interaction Simulation and Experimental Validation Of Bioprosthetic Heart Valves . Summer Biomechanics, Bioengineering, and Biotransport Conference (2023).

86. Sadipour M, Azadani AN. Bovine Pericardium Density Measurement and Its Implications On Leaflet Stress Distribution In Bioprosthetic Heart Valves. Summer Biomechanics, Bioengineering, and Biotransport Conference (2023).

85. Azadani AN and J Brlansky. Laser Ablation: A New Leaflet Modification Strategy to Prevent Coronary Obstruction in TAVR-in-TAVR. Journal of the American College of Cardiology 80 (12), B207-B207 (2022).

84. Shafiei M, Qiu D and Azadani AN. On the Likelihood of Leaflet Thrombosis Following Transcatheter Pulmonary Valve Replacement. Journal of the American College of Cardiology 80 (12), B146 (2022).

83. Qiu D and Azadani AN. The Importance of Leaflet Design in Initiation and Growth of Leaflet Thrombosis in Transcatheter Aortic Valves. Journal of the American College of Cardiology 80 (12), B145-B146 (2022).

82. Shafiei M, Qiu D and Azadani AN. Transcatheter Versus Surgical Pulmonary Valve Replacement: A Side-by-side Structural And Hemodynamic Characterization. The Heart Valve Society Annual Meeting (2022).

81. Qiu D and Azadani AN. Subclinical Leaflet Thrombosis Following Transcatheter Valve-in-valve Procedures: A Comparative Simulation Study Of Sapien 3 And Corevalve. The Heart Valve Society Annual Meeting (2022).

80. Qiu D and Azadani AN. Assessing the Risk of Leaflet Thrombosis following Transcatheter Aortic Valve-in-Valve Procedures: A Simulation Study. 74th Annual Meeting of the APS Division of Fluid Dynamics (2021).

79. Qiu D and Azadani AN. Transcatheter Aortic Valve Replacement in Bicuspid Valves: The Synergistic Impact of Eccentric and Incomplete Stent Deployment. The Annual Transcatheter Cardiovascular Therapeutics (TCT) Conference (2020).

78. Qiu D, Barakat M, Ravaghi S, Azadani AN. Transcatheter Aortic Valve Replacement in Bicuspid Valves: The Synergistic Impact of Eccentric and Incomplete Stent Deployment. Summer Biomechanics, Bioengineering, and Biotransport Conference (2020).

77. Ravaghi S, Qiu D, Barakat M, Azadani AN. Comparison of Transcathter Mitral Valve and Surgical Mitral Valve Leaflet Mechanical Properties. Summer Biomechanics, Bioengineering, and Biotransport Conference (2020).

76. Qiu D, Hopkins B, Barakat M, Azadani AN. Structural Analysis of Transcatheter Aortic Valve Replacement in Bicuspid Aortic Valves. The Annual Transcatheter Cardiovascular Therapeutics (TCT) Conference (2019).

75. Ravaghi S, Khodaee F, Qiu D, Hsu YC, Barakat M, Azadani P, Azadani AN. Transcatheter Mitral Valve Position Affects Risk of Valve Thrombosis Following TMVR Procedure. The Annual Transcatheter Cardiovascular Therapeutics (TCT) Conference (2019).

74. Barakat M, Zalloum J, Khodaee F, Azadani AN. A Non-Invasive Approach for Assessment the Severity of Paravalvular Leakage and Transvalvular Energy Loss using Echocardiography. The Annual Transcatheter Cardiovascular Therapeutics (TCT) Conference (2019).

73. Khodaee F, Barakat M, Abbasi M, Dvir D, Azadani AN. Transcatheter Heart Valve Under-Expansion increases the Likelihood of Leaflet Thrombosis. Journal of the American College of Cardiology 74 (13 Supplement), B703 (2019).

72. Khodaee F, D Qiu, YC Hsu, Dvir D, Azadani AN. Reducing the Risk of Leaflet Thrombosis following Transcatheter Aortic Valve-in-Valve Implantation by BASILICA Procedure: A Computational Simulation Study. Structural Heart 3 (sup1), 72-73 (2019).

71. Abbasi M, Barakat M, Dvir D, Azadani AN. Detailed Stress Analysis of Edwards-SAPIEN and Medtronic CoreValve Devices. Is Leaflet Stress Comparable to Surgical Carpentier-Edwards PERIMOUNT Magna Bioprosthesis? Structural Heart 3 (sup1), 192-192 (2019).

70. Khodaee F, Dvir D, Azadani AN. The Effect of Transcatheter Laceration of Degenerated Bioprosthetic Valve Leaets on the Likelihood of leaet thrombosis following Transcatheter Aortic Valve-in-Valve Implantation: A Computational Simulation Study. Journal of the American College of Cardiology 72 (13 Supplement), B137-B138 (2018).

69. Barakat M and Azadani AN. Severity Assessment of Transcatheter Aortic Valve Paravalvular Regurgitation Based on the Leakage Momentum Flux. Journal of the American College of Cardiology 72 (13 Supplement), B180 (2018).

68. Vahidkhah K, Abbasi M, Barakat M, Dvir D, Azadani AN. Multi-physics 3D computational study of leaflet thrombus formation following surgical and transcatheter aortic valve replacement. 70th Annual Meeting of the APS Division of Fluid Dynamics (2017).

67. Barakat M, Lengsfeld C, Dvir D, Azadani AN. Investigation of Flow Structures Downstream of SAPIEN 3, CoreValve, and PERIMOUNT Magna Using Particle Image Velocimetry. 70th Annual Meeting of the APS Division of Fluid Dynamics (2017).

66. Vahidkhah K, Abbasi M, Barakat M, Dvir D, Azadani AN. Leaflet Thrombosis Following Transcatheter Aortic Valve-in-Valve Implantation: A Comparative Modeling Study of SAPIEN 3 and CoreValve in PERIMOUNT Magna Surgical Bioprosthesis. Transcatheter Cardiovascular Therapeutics (TCT) Conference (2017).

65. Gao T, Javani S, Azadani AN. Quantification of the Relationship between the Left Atrium Pressure and the Ostial Diameter of the Left Atrial Appendage: A Patient-Specific Simulation Study. Transcatheter Cardiovascular Therapeutics (TCT) Conference (2017).

64. Abbasi M, Qiu D, Behnam Y, Dvir D, Clary C, Azadani AN. Three-dimensional Strain Mapping by Digital Image Correlation in Bioprosthetic Heart Valves: A Comparative Study of PERIMOUNT Magna, SAPIEN 3, and CoreValve. American Heart Association Scientific Session (2017).

63. Azadani AN. Transcatheter Aortic Valve Thrombosis: Mechanism, Prediction, and Prevention. BloodSurf Conference (2017, invited talk).

62. Vahidkhah K, Abbasi M, Barakat M, Dvir D, Azadani AN. Leaflet Thrombosis Following Surgical and Transcatheter Bioprosthetic Aortic Valve Replacement: A Comparative Modeling Study of PERIMOUNT Magna, SAPIEN 3, and CoreValve. American Heart Association Scientific Session (2017).

61. Vahidkhah K, Barakat M, Azadani AN. Severity Assessment of Transcatheter Aortic Valve Paravalvular Regurgitation: A New Approach Based on the Leakage Momentum Flux. American Heart Association Scientific Session (2017).

60. Vahidkhah K, Abbasi M, Javani S, Azadani PN, Tandar A, Azadani AN. Valve Thrombosis Following Transcatheter Aortic Valve Replacement: Implications of Reduced Cardiac Output. American College of Cardiology Scientific Session (2017).

59. Simonato M, Azadani AN, Reardon M, Aldea G, Nicjenig G, Kornowski R, Dvir D. Effect of Transcatheter Aortic Valve Size and Position on Valve-in-Valve Hemodynamics: An In-vitro Study. JACC: Cardiovascular Interventions (2017).

2016

58. Vahidkhah K, Javani S, Abbasi M, Azadani PN, Tandar A, Azadani AN. Increased Blood Residence Time on Transcatheter Aortic Valve Leaflets as a Precursor Mechanism to Leaflet Thrombosis following Valve-in-Valve Procedure: A Patient-Specific Simulation Study. Circulation 134 (Suppl 1), A13473-A13473 (2016).

57. Vahidkhah K and Azadani AN. Drawback of the Circumferential Extent of Paravalvular Regurgitation as a Semi-quantitative Parameter to Evaluate the Severity of Transcatheter Aortic Valve Leakage. Journal of the American College of Cardiology 68 (18_S), B287-B288 (2016).

56. Abbasi M and Azadani AN. A Geometry Optimization Framework for Transcatheter Aortic Valve Leaflet Shape. Journal of the American College of Cardiology 68 (18_S), B285-B285 (2016).

55. Vahidkhah K, Barakat M, Abbasi M, Javani S, Azadani PN, Tandar A, Dvir D, Azadani AN. Prolong Blood Stasis on Transcatheter Aortic Valve Leaflets as a Possible Mechanism for Thrombogenesis. Journal of the American College of Cardiology 68 (18_S), B266-B266 (2016).

54. Javani S, Azadani PN, Azadani AN. Patient-Specific Computational Modeling of the Left Atrium and Left Atrial Appendage: Application to Left Atrial Appendage Closure Devices. Biomedical Engineering Society Annual Meeting (2016).

53. Stewart B, Javani S, Wilcox D, Lengsfeld C, Azadani AN. 3D Bioprinting of Tissue Engineered Aortic Root Scaffolds with Hydrogels. Biomedical Engineering Society Annual Meeting (2016).

52. Abbasi M, Barakat M, Vahidkhah K, Azadani AN. Characterization of Three-dimensional Anisotropic Heart Valve Tissue Mechanical Properties at Various Rates of Deformation. Biomedical Engineering Society Annual Meeting (2016).

51. Vahidkhah K, Barakat M, Abbasi M, Javani S, Azadani PN, Tandar A, Dvir D, Azadani AN. Prolonged Blood Residence Time on Transcatheter Aortic Valve Leaflets as a Permissive Factor in Valve Thrombosis. Biomedical Engineering Society Annual Meeting (2016).

50. Vahidkhah K, Cordasco D, Abbasi M, Ge L, Tseng E, Bagchi P, Azadani AN. Flow-Induced Damage to Blood Cells in Aortic Valve Stenosis: A Multiscale Analysis. Biomedical Engineering Society Annual Meeting (2016).

49. Barakat M, Vahidkhah K, Abbasi M, Azadani AN. Pulsatile Flow Studies of a Bovine Pericardial Heart Valve Bioprosthesis in Low, Normal, and High Cardiac Outputs: PIV Measurements. Biomedical Engineering Society Annual Meeting (2016).

48. Abbasi M, Barakat M, Vahidkhah K, Azadani AN. Frame Flexibility Effects on Leaflet Stress Distribution: Comparison of Transcatheter versus Surgical Aortic Valve Bioprostheses. The Heart Valve Society Scientific Meeting (2016).

47. Vahidkhah K, Cordasco D, Abbasi M, Ge L, Tseng E, Bagchi P, Azadani AN. Multiscale Analysis of Blood Flow through Aortic Valve Stenosis: Implications on Red Blood Cell Membrane Damage. The Heart Valve Society Scientific Meeting (2016).

46. Azadani AN and Azadani PN. Noninvasive Assessment of Paravalvular Aortic Regurgitation following Transcatheter Aortic Valve Replacement Based on Energy Loss. The Heart Valve Society Scientific Meeting (2016).

45. Azadani PN and Azadani AN. Quantitative Assessment of Paravalvular Aortic Regurgitation following Transcatheter Valve Replacement Based on Transvalvular Energy Loss. American College of Cardiology (2016).

2015

44. Abbasi M and Azadani AN. The Synergistic Impact of Eccentric and Incomplete Stent Deployment on Transcatheter Aortic Valve LeaFLet Stress Distribution. Journal of the American College of Cardiology (2015).

43. Abbasi M, Barakat MS, Javani S, Azadani AN. Stress Analysis of Transcatheter Aortic Valves under Dynamic Loading: Impact of Tissue Thickness. Biomedical Engineering Society Annual Meeting (2015).

42. Abbasi M, Barakat MS, Javani S, Azadani AN. Assessment of Viscous Damping Coefficient of Bioprosthetic Valves under Physiological Loading. Biomedical Engineering Society Annual Meeting (2015).

41. Javani S, Abbasi M, Gordon M, Azadani AN. Passive Biaxial Mechanical Properties of Different Anatomical Regions of Normal Ovine Heart. Biomedical Engineering Society Annual Meeting (2015).

40. Talukder R, Stewart B, Clinkenbeard A, Beheshtian A, Azadani PN, Azadani AN. Ex-Vivo Slaughterhouse Porcine Crystalloid-Perfused Beating Heart Organ via Langendorff Method. Biomedical Engineering Society Annual Meeting (2015).

39. Abbasi M and Azadani AN. Effect of Transcatheter Aortic Valve Tissue Thickness on Leaflet Stress Distribution: A Finite Element Study under Dynamic Loading Condition. Heart Valve Society Annual Scientific Meeting. (2015).

2013 - 2014

38. Abbasi M and Azadani AN. Transcatheter Aortic Valve Oversizing: A Comparison of Leaflet Stress and Strain Distribution. Journal of the American College of Cardiology. 64(11) (2014).

37. Abbasi M and Azadani AN. Impact of Transcatheter Aortic Valve Oversizing on Leaflet Stress and Strain Distribution. Biomedical Engineering Society Annual Meeting (2014).

36. Krishnan K, Ye J, Dvir D, Azadani AN, Guccione J, Ge L, Tseng E. Finite Element AnalysesStent and Leaflet Stresses on 26mm Transcatheter Aortic Valve. Journal of the American College of Cardiology. 64(1) (2014).

35. Scott N, TalukderR, Clinkenbeard A, Lengsfeld C, Azadani AN. A Fully-Coupled Fluid Structure Interaction Simulation of Transcatheter Aortic Valve: Implication for Long-Term Valve Durability. Journal of the American College of Cardiology. 62(18) (2013).

2007 - 2012

34. Ge L, Azadani AN, Chitsaz S, Mookhoek A, Wisneski A. Patient-Specific Computational Modeling of Transcatheter Aortic Valve Implantation. Journal of the American College of Cardiology. 60(17) (2012).

33. Azadani AN, Chitsaz S, Wisneski A, Lui N, Guccione J, Ge L, Tseng E. Finite Element Modeling of Transcatheter Aortic Valve Replacement. 5th Biennial Conference on Heart Valve Biology and Tissue Engineering. 82 (2012).

32. Lui N, Chitsaz S, Wisneski A, Takabe K, Azadani AN, Tseng E. Successful use of an eptibatide bridge for patients taking clopidogrel before cardiac surgery. Journal of the American College of Surgeons. 215(3) (2012).

31. Azadani AN, Jaussaud N, Ge L, Chitsaz S, Chuter TA, Tseng, EE. Impact of Orientation and Size Matched Transcatheter Aortic Valves on Valve-in-Valve Hemodynamics. Journal of the American College of Cardiology. 56; B31 (2011).

30. Azadani AN, Chitsaz, S, Tseng, EE, Ge L. Finite Element Analysis of Transcatheter Aortic Valve Implantation: Impact of Oversizing on Stent and Leaflet Stresses. Transcatheter Cardiovascular Therapeutics (TCT) Annual Meeting (2011).

29. Azadani AN, Jaussaud N, Ge L, Chitsaz S, Chuter TA, Tseng, EE. Impact of Orientation and Size Matched Transcatheter Aortic Valves on Valve-in-Valve Hemodynamics. Journal of the American College of Cardiology. 56; B31 (2011).

28. Azadani AN, Chitsaz S, Matthews P, Jaussaud N, Leung J, Tsinman T, Tseng EE. Significant Material Property Difference between Fresh Human Pulmonary and Aortic Roots. The 6th Biennial Meeting of the Society for Heart Valve Disease, Barcelona, Spain (2011).

27. Azadani AN, Tseng, EE, Ge L. Finite Element Analysis of Transcatheter Aortic Valve Implantation. American Society for Artificial Internal Organs 57th Annual Conference, Washington, DC (2011).

26. Azadani AN, Dwyer, HA, Matthews PB, Jaussaud, Chitsaz S, Ge L, Tseng EE. Fluid Dynamic Assessment of Transcatheter Aortic Valve Implantation. Cardiovascular Fluid Mechanics – Euromech Conference, Cagliari, Italy (2011).

25. Azadani AN, Jaussaud N, Ge L, Chitsaz S, Chuter T, Tseng EE. Impact of 20mm transcatheter aortic valves on valve-in-valve hemodynamics for small degenerated bioprostheses. Euro-Intervention (2011).

24. Azadani AN, Jaussaud N, Ge L, Chitsaz S, Chuter T, Tseng E. Impact of transcatheter aortic valve orientation on valve-in-valve hemodynamics. Euro-Intervention (2011).

23. Azadani AN. Energy Loss for Evaluating Transcatheter Valve Performance. Proceedings of ASME 5th Frontiers in Biomedical Devices Conference, Irvine, CA (2010).

22. Azadani AN, Jaussaud N, Matthews P, Ge L, Chuter T, Tseng EE. Oversized Transcatheter Aortic Valves Can Lead to Transcatheter Valve-Bioprosthesis Mismatch in Small Size Degenerated Bioprostheses. Euro PCR (2010).

21. Azadani AN, Jaussaud N, Ge L, Chuter TA, Tseng, EE. Patient-Transcatheter Aortic Valve Mismatch Adversely Effects Leaflet Kinematics and Flow Field. 4th Biennial Heart Valve Biology and Tissue Engineering Meeting (2010).

20. Azadani AN, Jaussaud N, Ge L, Chuter TA, Tseng, EE. A Novel Transcatheter Aortic Valve Engineered to Avoid Leaflet Distortion and Asymmetry. 4th Biennial Heart Valve Biology and Tissue Engineering Meeting (2010).

19. Azadani AN, Jaussaud N, Ge L, Chuter TA, Tseng EE. Transcatheter Aortic Valve Oversizing Adversely Impacts Leaflet Kinematics, Flow Field, and Durability. Annual Meeting of the Society for Biomaterials (2010).

18. Azadani AN, Jaussaud N, Matthews P, Ge L, Chuter T, Tseng EE. Valve-in-Valve Implantation of Oversized Transcatheter Aortic Valves Lead to Transcatheter Valve-Bioprosthesis Mismatch in Small Size Degenerated Bioprostheses. CIT conference (2010).

17. Azadani AN, Jaussaud N, Matthews P, Ge L, Chuter T, Tseng EE. Hemodynamic Function of Transcatheter Aortic Valves within Degenerated Bioprosthetic Stenosis. Asia PCR, Singapore (2010).

16. Azadani AN, Jaussaud N, Matthews PB, Ge L, Guy TS, Saloner D, Chuter TA, Tseng, EE. Can Degenerated Bioprostheses Be Treated Effectively Using The Currently Available Transcatheter Aortic Valves? Transcatheter Cardiovascular Therapeutics Meeting (2009).

15. Azadani AN, Jaussaud N, Matthews PB, Ge L, Chuter TA, Tseng EE. Aortic Valve-in-Valve Implantation: Flow Field and Leaflet Kinematics. Biomedical Engineering Society Annual Fall Scientific Meeting (2009).

14. Chitsaz S, Jaussaud J, Chau E, Azadani AN, Guy TS, Ratcliffe M, Tseng EE. Veteran patients with severe aortic stenosis: Outcomes with and without aortic valve replacement. J Am Coll. Surg.:211(3):S30 (2010).

13. Ge L, Azadani AN, Tseng EE. Left Ventricle of Mammalian Hearts Optimized for High Hydrodynamic Efficiency. 62nd Annual Meeting of American Physical Society, Division of Fluid dynamics, Minneapolis (2009).

12. Matthews PB, Yaung S, Azadani AN, Jaussaud N, Jhun CS, Guccione J, Guy TS, Tseng EE. Pulmonary Autograft Wall Stress Calculation with Finite Element Modeling. 5th Biennial Meeting of the society for Heart Valve Disease, Berlin (2009).

11. Matthews P, Kim B, Azadani AN, Guccione J, Guy T, Saloner D, Tseng E. Finite Element Analysis of Pulmonary Autograft Dilation. Journal of the American College of Surgeons; 207(3): S32-S32 (2008).

10. Dwyer H, Matthews P, Azadani AN, Ge L, Saloner D, Guy T, Tseng E. Hemodynamics of Transcatheter Aortic Valve Stenosis. Journal of the American College of Surgeons ; 207(3): S26-S26 (2008).

9. Azadani AN, Lopez JM, Hirsa AH. Coupling of a protein-laden air/water interface to a shearing bulk flow. Bulletin of the American Physical Society (BAPS), 52 (2007).

8. Dexter A, Azadani AN, Sorci M, Belfort G, and Hirsa AH. Flow induced protein nucleation: Insulin oligomerization under shear. BASP, 52 (2007).

7. Azadani AN, Hirsa AH. Protein Crystallization Induced and Enhanced via Hydrodynamics. BAPS, 51 (9), 193 (2006).

6. Azadani AN, Hirsa AH. Flow Induced Gradients in 2-D Protein Crystallization on a Gas/Liquid Interface. 80th ACS Colloid and Surface Science, Boulder, CO (2006).

5. Azadani AN, Hirsa AH. Flow-Induced Protein Crystallization at Air/Water Interface. New England Complex Fluids Workshop, Harvard University, Cambridge, MA (2006).

4. Hirsa AH, Azadani AN, Belfort G, Liu H. Protein Crystallization on Liquid Surface: Forced versus Natural Crystallization. BAPS 50 (9), 88 (2005).

3. Taeibi M, Saeidi MH, Azadani AN. Numerical Modeling of a Centrifugal Pump at Design and Off-design Condition. The 1st Cappadocia Int. Mech. Eng. Conference, Turkey (2004).

2. Azadani AN, Saeidi M, Taeibi M. Numerical Prediction of the Hydrodynamic Performance of Centrifugal Pumps. 5th National Conf. of Iranian Aero. Society, Iran (2004).

1. Azadani AN, Motamedi R, Sadegipour M. Energy Consumption Optimization in Centrifugal Pumps. 9th Annual International Conference of Mech. Engineering, Iran (2001).