Dr. Ibrahim Yusuf
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Dr. Ibrahim Yusuf

Associate Professor
Bayero University, Nigeria

Highest Degree
Ph.D. in Mathematics from Bayero University Kano, Nigeria

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Area of Interest:

Mathematics
100%
Computational Mathematics
62%
Operational Research
90%
Stochastic Process
75%
Probability Theory
55%

Research Publications in Numbers

Books
0
Chapters
0
Articles
81
Abstracts
0

Selected Publications

  1. Yusuf, I., B. Sani and B. Yusuf, 2019. Profit analysis of a serial-parallel system under partial and complete failures. J. Applied Sci., 19: 565-574.
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  2. Yusuf, I., S.M. Umar and K. Suleiman, 2018. Performance analysis of a single host system with three types of heterogeneous software. Res. J. Appl. Sci., 13: 735-741.
  3. Yusuf, I., R.T. Gatawa and K. Suleiman, 2018. Availability analysis of a consecutive three stages deteriorating standby system considering maintenance and replacement. J. Math. Sci. Model., 1: 21-26.
  4. Yusuf, I., B. Yusuf, M. Babagana, B. Sani and A.M. Lawan, 2018. Some reliability characteristics of linear consecutive 2-out-of-4 system connected to 2-out-of-4 supporting device for operation. Int. J. Eng. Technol., 7: 135-139.
  5. Yusuf, I., B. Sani and M. Babagana, 2018. Availability modelling and enhancement of a computer system with redundant heterogeneous software. Eng. Math. Lett., 2018: 1-16.
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  6. Yusuf, I. and Y.B. Musa, 2018. Cost analysis of systems with mixed standby units. Int. J. Mech. Rob. Syst., 4: 234-251.
  7. Lado, A., V.V. Singh, H.K. Ismail and I. Yusuf, 2018. Performance and cost assessment of repairable complex system with two subsystems connected in series configuration. Int. J. Reliab. Appl., 19: 27-42.
  8. Yusuf, I. and N.J. Fagge, 2017. Evaluation of some reliability characteristics of a single unit system requiring two types of supporting device for operations. Appl. Applied Math. Int. J., 12: 803-812.
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  9. Yusuf, I. and B. Sani, 2017. Mathematical models for comparison of mean time to system failure of multi-states series-parallel system. J. Niger. Assoc. Math. Phys., 42: 103-106.
  10. Yusuf, B., S. Ali, S. Murtala, I. Yusuf and L.S. Abdurrahman, 2017. Assessment of some reliability measures of a duplicated standby system subject to individual and group replacement at failure. Bayero J. Phys. Math. Sci., 8: 167-179.
  11. Yusuf, B., B.M. Yakasai, A.J. Badakaya and I. Yusuf, 2017. Optimal preventive replacement model for a system subject to two types of failure. Bayero J. Pure Appl. Sci., 10: 89-94.
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  12. Waziri, T.A., B.M. Yakasai and I. Yusuf, 2017. Evaluation of instantaneous reliability measures for a gradual deteriorating system. Gen. Lett. Math., 3: 177-185.
  13. Usman, B.T., I. Yusuf, G.H. Anka, B. Sani and Z.I. Mayaki, 2017. Non reparable 2-out-of 3 system reliability prediction under online and offline preventive maintenance with replacement at system failure. J. Niger. Assoc. Math. Phys., 42: 107-112.
  14. Suleiman, K., U.A. Ali, I. Yusuf, A.D. Koko and S.I. Bala, 2017. Comparison between four dissimilar solar panel configurations. J. Ind. Eng. Int., 1: 3479-3486.
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  15. Suleiman, K., I. Yusuf, U.A. Ali, A.D. Koko and S.I. Bala, 2017. Availability comparison between three dissimilar solar panel configurations. Int. J. Applied Math. Res., 6: 80-84.
  16. Sani, B., R. Gatawa and I. Yusuf, 2017. Reliability assessment of deteriorating system, reliability theory and application. Int. J. Appl. Math. Res., 12: 20-29.
  17. Fagge, N.J., I. Yusuf and U.A. Ali, 2017. Availability evaluation of repairable system requiring two types of supporting device for operations. Int. J. Applied Math. Res., 6: 14-19.
  18. Bala, S.I., I. Yusuf and Y.A. Nuhu, 2017. Markov chain approach to availability and profit evaluation of a series-parallel system with minor and major failures. Int. J. Applied Math. Res., 6: 67-73.
  19. Bala, S.I. and I. Yusuf, 2017. Probabilistic approach to performance evaluation of a series-parallel system. Int. J. Applied Math. Res., 6: 74-79.
  20. Yusuf, I., M. Babagana, B. Yusuf and M.A. Lawan, 2016. Reliability analysis of a linear consecutive 2-out-of-3 system in the presence of supporting device and repairable service station. Int. J. Operat. Res., 13: 013-024.
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  21. Yusuf, I., A.S. Halilu and N.G. Khalil, 2016. Reliability modelling and analysis of a non repairable series-parallel system. J. Math. Comput. Sci., 6: 247-253.
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  22. Yusuf, I., 2016. Reliability modelling of a parallel system with a supporting device and two types of preventive maintenance. Int. J. Operat. Res., 25: 269-287.
  23. Yusuf, I. and R.I. Gatawa, 2016. Probabilistic models for reliability analysis of a system with three consecutive stages of deterioration. Reliability Theor. Appl., 11: 30-37.
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  24. Suleiman, K., I. Yusuf, U.A. Ali, A.D. Koko and S.I. Bala, 2016. Availability comparison between three dissimilar photovoltaic configurations. MJ J. Engi. Math., 1: 1-7.
  25. Jibrin, F.N., U.A. Ali and I. Yusuf, 2016. Mean time to system Failure assessment of a single unit system requiring two types of supporting device for operation. Reliability: Theor. Appl., 11: 55-61.
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  26. Bala, S.I., I. Yusuf and Y.A. Nuhu, 2016. Markov chain approach to availability and profit evaluation of a series-parallel system with minor and major failures. MJ J. Stat. Probab., 1: 9-16.
  27. Bala, S.I. and I. Yusuf, 2016. Probabilistic approach to performance evaluation of a series-parallel system. MJ J. Stati. Probab., 1: 1-8.
  28. Bala, S.I. and I. Yusuf, 2016. Markov chain profit modelling and evaluation between two dissimilar systems under two types of failures. Appl. Applied Math.: Int. J., 11: 489-503.
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  29. Babagana, M., B. Gimba and I. Yusuf, 2016. Introducing probabilistic models for redundant system reliability. Operation Res. Decisions J., 1: 5-18.
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  30. Yusuf, I., 2015. Availability modelling and evaluation of a repairable system subject to minor deterioration under imperfect repairs. Int. J. Math. Operat. Res., 7: 42-51.
  31. Yusuf, I. and U.A. Ali, 2015. Reliability analysis of four redundant communication networks. J. Niger. Assoc. Math. Phys., 29: 251-258.
  32. Yusuf, B., I. Yusuf and B.M. Yakasai, 2015. Minimal repair replacement model for a system with two types of failures. Applied Math. Sci., 9: 6868-6875.
  33. Suleiman, K., A.I. Aliyu, I. Cecillia, I. Yusuf, B. Yusuf and H. Awwal, 2015. Application of linear programming technique in minimizing cost of transportation: A case study of Coca Cola Botling Company Dutse Jigawa State. J. Pure Appl. Sci., 1: 114-125.
  34. Kabiru, S., I. Yusuf and U.A. Ali, 2015. Analysis of reliability characteristics of four dissimilar solar photovoltaic systems. Int. J. Math. Comput., 26: 87-103.
  35. Ibrahim Yusuf, I., U.A. Ali, M. Babagana and B. Gimba, 2015. Probabilistic models for MTSF comparison between systems connected to supporting device for operation. Am. J. Comput. Applied Math., 5: 140-146.
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  36. Aliyu, M., I. Yusuf and U. Ali, 2015. Availability and profit optimization of series-parallel system with linear consecutive cold standby units. Applied Math., 6: 332-344.
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  37. Yusuf, I., R. Said, F. Koki and M. Babagana, 2014. Reliability modelling and analysis of redundant systems connected to supporting external device for operation attended by a repairman and repairable service station. J. Applied Math. Phys., 2: 1242-1256.
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  38. Yusuf, I., N. Hussaini and B.M. Yakasa, 2014. Some reliability measures of a deteriorating system. Int. J. Applied Math. Res., 3: 23-29.
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  39. Yusuf, I., K. Suleiman, Y. Bashir and U.A. Ali, 2014. Stochastic modelling and analysis of a repairable 2-out-of-4 system. Int. J. Math. Oper. Res., 6: 23-34.
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  40. Yusuf, I., B.Yusuf and S.I. Bala, 2014. Mean time to system failure analysis of a linear consecutive 3-out-of-5 warm standby system in the presence of common cause failure. J. Math. Comp. Sci., 4: 58-66.
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  41. Yusuf, I., B. Yusuf and M.A. Lawan, 2014. Mathematical modelling approach to analyzing mean time to system failure of two unit cold standby system with a supporting device and repairable service station. Open J. Math. Mod., 2: 7-15.
  42. Yusuf, I., 2014. Comparative reliability analysis of five redundant network flow systems. Reliability: Theor. Appl., 9: 51-60.
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  43. Yusuf, I., 2014. Comparative analysis of profit between three dissimilar repairable redundant systems using supporting external device for operation. J. Ind. Eng. Int., 10: 199-207.
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  44. Yusuf, I. and N. Hussaini, 2014. A comparative analysis of three unit redundant systems with three types of failures. Arabian J. Sci. Eng., 39: 3337-3349.
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  45. Yusuf, I. and L.M. Bulama, 2014. Analysis of some reliability measures of a deteriorating reinforced concrete structure. Math. Theor. Modell., 1: 19-31.
  46. Yusuf, I. and B. Yusuf, 2014. Comparative analysis of some reliability characteristics between two dissimilar redundant systems with replacement at common cause failure. Int. J. Adv. Stat.Probab., 2: 1-14.
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  47. Yusuf, I and B. Yusuf, 2014. Reliability comparison between redundant repairable network flow systems. SOP Trans. Applied Math., 1: 42-59.
  48. Ali, U.A., K. Suleiman, B. Yusuf and I. Yusuf, 2014. Mean time to system failure and availability modeling of a repairable non identical three unit warm standby redundant system. Niger. J. Basic Applied Sci., 20: 315-323.
  49. Ali, U.A. and I. Yusuf, 2014. Availability and profit analysis of a linear consecutive 2-out-of-4 repairable system with units exchange. Am. J. Applied Math. Stat., 2: 83-87.
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  50. Ali, U., S.I. Bala and I. Yusuf, 2014. Evaluation of mean time to system failure of a repairable 3-out-of-4 System with online preventive maintenance. Am. J. Applied Math. Stat., 2: 29-33.
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  51. Yusuf, I., S.I. Bala and U.A. Ali, 2013. Availability and economic analysis of a repairable redundant system. J. Niger. Assoc. Math. Phys., 23: 365-374.
  52. Yusuf, I., B. Yusuf and S.I. Bala, 2013. Availability and cost analysis of a deteriorating system. J. Math. Comput. Sci., 3: 607-618.
  53. Yusuf, I., 2013. Stochastic analysis of a repairable warm standby system in the presence of repair machines. J. Math. Comput. Sci., 3: 365-378.
  54. Yusuf, I., 2013. Comparison of some reliability characteristics between redundant systems requiring supporting units for their operations. J. Math. Comput. Sci., 3: 216-232.
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  55. Yusuf, I. and S.I. Bala, 2013. Modeling and evaluation of MTSF of a repairable 2-out-of-4 warm standby system attended by repair machines and repairmen. Eng. Math. Lett., 2: 81-89.
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  56. Yusuf, I. and S.I. Bala, 2013. Analysis of stochastic reliability characteristics of a system using standby external supporting device for its operation. Int. J. Inf. Manag. Sci., 24: 297-306.
  57. Yusuf, I. and F.S. Koki, 2013. Assessment of profit of a two-stage deteriorating linear consecutive 2-out-of-3 repairable system. J. Applied Math. Phys., 1: 21-27.
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  58. Yusuf, I. and F.S. Koki, 2013. Analysis of stochastic reliability characteristics of a repairable 2-out-of-3 system with minimal repair at failure. Applied Math., 4: 115-1124.
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  59. Yusuf, I. and F. Koki, 2013. Evaluation of reliability and availability characteristics of a repairable system with active parallel units. Open J. Applied Sci., 3: 337-344.
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  60. Yusuf, I. and B. Yusuf, 2013. Evaluation of reliability characteristics of two dissimilar network flow systems. Applied Math. Sci., 7: 1983-1999.
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  61. Yusuf, I. and B. Gimba, 2013. Modeling and evaluation of mtsf of 2-out-of-5 warm standby repairable system with replacement. Applied Math. Sci., 7: 6403-6415.
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  62. Yusuf, B. and I. Yusuf, 2013. Profit evaluation of a repairable system with three stage deterioration. General Math., 17: 23-40.
  63. Yusuf, B. and I. Yusuf, 2013. Evaluation some reliability characteristics of a system under three types of failures with repair-replacement at failure. Am. J. Operational Res., 3: 83-91.
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  64. Bulama, L., I. Yusuf and S.I. Bala, 2013. Stochastic modeling and analysis of some reliability characteristics of a repairable warm standby system. Applied Math. Sci., 7: 5847-5862.
  65. Ali, U.A., N.I. Bala and I. Yusuf, 2013. Reliability analysis of a two dissimilar unit cold standby system with three modes using kolmogorov forward equation method. Nig. J. Basic Appl. Sci., 21: 197-206.
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  66. Yusuf, I., S.I. Bala and U.A. Ali, 2012. Stochastic modelling of a non maintained system with two stages of deterioration. Int. J. Basic Applied Sci., 1: 312-320.
  67. Yusuf, I., K. Suleiman, S.I. Bala and U.A. Ali, 2012. Modeling the reliability and availability characteristics of a system with three stages of deterioration. J. Sci. Technol., 1: 329-337.
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  68. Yusuf, I., 2012. Stochastic modelling and performance analysis of a repairable series-parallel system with independent failures. J. Niger. Assoc. Math. Phys., 21: 61-72.
  69. Yusuf, I., 2012. Availability and profit analysis of 3-out-of-4 repairable system with preventive maintenance. Int. J. Applied Math. Res., 1: 510-519.
  70. Yusuf, I. and U.A. Ali, 2012. Structural dependence replacement model for parallel system of two unit. Niger. J. Basic Applied Sci., 20: 324-326.
  71. Yusuf, I. and S.I. Bala, 2012. Stochastic modelling of a two unit parallel system under two types of failures. Int. J. Latest Trends Math., 2: 44-52.
  72. Yusuf, I. and S.I. Bala, 2012. Stochastic modelling and performance measures of redundant system operating in different conditions. Int. J. Comput. Appl., 50: 23-29.
  73. Yusuf, I. and N. Hussaini, 2012. Stochastic modeling of repairable redundant system comprising one big unit and three small dissimilar units. Am. J. Comput. Applied Math., 2: 174-188.
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  74. Yusuf, I. and N. Hussaini, 2012. Evaluation of reliability and availability characteristics of 2-out of -3 standby system under a perfect repair condition. Am. J. Math. Stat., 2: 114-119.
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  75. Suleiman, K., U.A. Ali, Y. Bashir and I. Yusuf, 2012. Measuring the effectiveness of a complex repairable series-parallel system involving four types of failures. Int. J. Basic Applied Sci., 1: 523-533.
  76. Yusuf, I. and S.I. Bala, 2011. Stochastic analysis of three non identical unit in parallel modeled as corrosion protection for coated reinforced concrete structures. Pioneer J. Math. Math. Sci., 3: 17-26.
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  77. Yusuf, I., 2010. Improving reliability of series system. Klobex Acad. Publ., 11: 185-187.
  78. Yusuf, I. and S.M. Umar, 2010. Replacement problem of n units parallel systems with minimal repair options. Klobex Acad. Publ., 11: 203-205.
  79. Umar, S.M. and I. Yusuf, 2010. Multivariate exponential autoregressive and autoregressive moving average models. J. Niger. Assoc. Math. Phys., 16: 543-552.
  80. Yusuf, I., 2009. Computing shapley-shubik power index in weighted double majority games. A review. Klobex Acad. Publ., 10: 181-187.
  81. Adamu, A.S., A.B. Baffa and I. Yusuf, 2009. Mathematical Modeling of Blood Flow Through Unconstricted vessel. Klobex Academic Publishers, Nigeria.