Dr Seleshi

SELESHI DEMIE (PhD)

Assistant Professor of Mathematics

EDUCATION

Andhra University, India

2015: PhD in Applied Mathematics, Andhra University, India
Addis Ababa University
1999: MSc in Mathematics, Addis Ababa University, Ethiopia
Addis Ababa University
1989: BSc in Mathematics,Addis Ababa University, Ethiopia

WORK EXPERIENCE
Haramaya University, Assistant Professor
Feb 23, 2015 to date
Haramaya University, Lecturer
Aug 1999 to Feb 22, 2015
Senior Secondary School Mathematics Teacher Aug 1989 to Aug 1997
Administrative Experience
Head of department of Mathematics, Haramaya University (Sep 4, 2002 to April 10, 2008 & Oct 8, 2009 to Aug 18, 2010),
College Registrar Head, College of Natural & Computational Sciences, Haramaya University (May 9, 2015 to June 21, 2017),
Associate Dean, College of Natural & Computational Sciences, Haramaya University (June 22, 2017 to 2024)

Dean, College of Natural & Computational Sciences, Haramaya University (February 12, 2024 to date)

Research Interest
My research interest includes the following.

  • Operations research and Optimization:- queueing theory and its application in scheduling, resource allocation, and traffic flow; optimization of queueing systems; real life applications of mathematical programming models
  • Mathematical Modeling & Mathematics Education
  • Abstract Algebra: Theory of Semi-groups & Near Rings

    • Publications
    1. Teketel Ketema, Seleshi Demie and Melisew Tefera Belachew. 2021. Controllable M/M/2 machine repair problem with multiple working vacations and triadic (0, Q, N, M) policy. International Journal of Management Science and Engineering Management, 16(3): 184 - 196. https://doi.org/10.1080/17509653.2021.1935358
    2. Doyo Kereyu and Seleshi Demie. 2021. Transmission dynamics model of Tuberculosis with optimal control strategies in Haramaya district, Ethiopia. Advances in Difference Equations, 2021:289. https://doi.org/10.1186/s13662-021-03448-z
    3. Getachew Teshome Tilahun, Seleshi Demie and Alemayehu Eyob. 2020. Stochastic model of measles transmission dynamics with double dose vaccination. Infectious Disease Modelling, 5: 478 – 494. https://doi.org/10.1016/j.idm.2020.06.003
    4. Seleshi Demie, Yilfashewa Seyoum and Weldekiros Tsehayu. 2019. Cooperative learning as a window of opportunity to transact Mathematics instruction in Alamata and Korem Secondary Schools of Tigray, Ethiopia. International Journal of Education & Literacy Studies, 7(4): 136 – 143. http://dx.doi.org/10.7575/aiac.ijels.v.7n.4p.136
    5. Yilfashewa Seyoum Mekuria, Seleshi Demie Alemu and Hulualem Tadesse. 2018. Analysis of students’ commitment and attitude towards mathematics in secondary school of dega Woreda, Oromia National Regional State, Ethiopia. HUMANIORA, 9(2): 187-197. https://doi.org/10.21512/humaniora.v9i2.4738
    6. Vijaya Laxmi, P., Jyothsna, K. and Seleshi, D. 2015. Analysis of a discrete-time working vacation queue with balking. OPSEARCH, 52(3): 562-581. http://dx.doi.org/10.1007%2Fs12597-014-0191-4
    7. Pikkala Vijaya Laxmi and Seleshi Demie. 2014. Performance analysis of renewal input (a, c, b) policy queue with multiple working vacations and change over times. Journal of Industrial and Management Optimization, 10(3): 839-857. http://dx.doi.org/10.3934/jimo.2014.10.839
    8. Vijaya Laxmi, P. and Seleshi, D. 2014. Batch service queue with change over times and Bernoulli schedule vacation interruption. OPSEARCH, 51(3), 354-375. doi 10.1007/s12597-013-0149-y
    9. Vijaya Laxmi, P., Goswami, V. and Seleshi, D. 2014. Optimization of renewal input (a, c, b) policy working vacation queue with change over time and Bernoulli schedule vacation interruption. TWMS J. App. Eng. Math. 4(2), 131-146. http://jaem.isikun.edu.tr/web/images/articles/vol.4.no.2/01.pdf
    10. Vijaya Laxmi, P. and Seleshi, D. 2014. Discrete-Time State Dependent Bulk Service Queue with Multiple Vacations and Changeover Times. ISRN Operations Research, http://dx.doi.org/10.1155/2014/356325
    11. Seleshi Demie and Vijaya Laxmi, P. 2013. Batch service multiple working vacations queue with change over times. International Journal of Mathematical Archive, 4(5), 43-51. http://www.ijma.info/index.php/ijma/article/view/2098
    12. Vijaya Laxmi Pikalaa, Goswami, V. and Seleshi Demie. 2013. Discrete-time renewal input bulk service queue with changeover time. International Journal of Management Science and Engineering Management, 8(1), 47–55. https://doi.org/10.1080/17509653.2013.783189
    13. Vijaya Laxmi, P. and Seleshi, D. 2013. On (a, c, b) Policy Queue with Change Over Times Under Bernoulli Schedule Vacation Interruption. International Journal of Mathematical Modelling & Computations, 3(3), 181- 196.
    14. Laxmi, P.V., Goswami, V. and Seleshi, D. 2013. Renewal input (a, c, b) policy queue with multiple vacations and change over times. International Journal Mathematics in Operational Research, 5(4), 466–491.
    15. Vijaya Laxmi, P., Seleshi Demie and Goswami, V. 2012. Finite buffer servers’ vacation queue with change over times. International Journal of Applied Mathematics and Computation, 4(4), 341–351.
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    REFERENCES

    1. Dr. P. Vijaya Laxmi
    Department of Applied Mathematics
    Andhra University
    India, Andhra Pradesh, Visakhapatnam 530 003
    Tel: +91-0891-2844524, 4525 (office)
    Tel: +91-9989-57-80-75 (Cell)
    E-mail:head.appliedmaths@andhrauniversity.edu.in
    vijaya_iit2003@yahoo.co.in
    vijayalaxmiau@gmail.com
    2. Prof. Veena Goswami
    School of Computer Applications
    Kalinga Institute of Industrial Technology
    Bhubaneswar, India, 751024
    Phone: +91-9437-30-66-28
    Email:veena_goswami@yahoo.com