Local stability analysis for tuberculosis epidemic with si1i2r model

JOURNAL OF PHYSICS: CONFERENCE SERIES 1943 (1), 012132, 2021

Authors: FA Taqiya, RH Tjahjana, RHS Utomo, R Herdiana, AH Permatasari

Mathematical model of ships convoy in delivery of goods

JOURNAL OF PHYSICS: CONFERENCE SERIES 1943 (1), 012117

Authors: RH Tjahjana

Dynamic modelling of hepatitis b and use of optimal control to reduce the infected population and minimizing the cost of vaccination and treatment

AIP CONFERENCE PROCEEDINGS 2331 (1), 020013

Authors: D Mahardika, RH Tjahjana, Sunarsih

Analysis of the efficiency sa (simulated annealing) model and fuzzy time series (case study: inventory system pt y)

JOURNAL OF PHYSICS: CONFERENCE SERIES 1776 (1), 012059

Authors: R Ariyanto, RH Tjahjana, T Udjiani

Dynamic modelling of covid-19 and the use of “merah putih” vaccination and herbal medicine treatment as optimal control strategies in semarang city indonesia

JOURNAL OF PHYSICS: CONFERENCE SERIES 1722 (1), 012070

Authors: D Mahardika, RH Tjahjana, HJ Sunarsih

Optimal control approach for hiv-1 infection in cd4+ t cells with rti and pi treatments

IJCSAM (INTERNATIONAL JOURNAL OF COMPUTING SCIENCE AND APPLIED MATHEMATICS …

Authors: RH Tjahjana, S Sutimin

Optimal path determination for flying vehicle to search an object

IOP CONFERENCE SERIES: MATERIALS SCIENCE AND ENGINEERING 300 (1), 012041

Authors: RH Tjahjana, L Ratnasari, B Irawanto

The consistency of fuzzy preference relation and its relationship to multiplicative preference relation

JURNAL MATEMATIKA UNDIP 1 (2), 555-562

Authors: DE Melati, F Farikhin, H Tjahjana

Modeling cd4+ t cells and ctl response in hiv-1 infection with antiretroviral therapy

COMMUNICATION IN BIOMATHEMATICAL SCIENCES 1 (2), 100-109

Authors: S Sutimin, S Sunarsih, RH Tjahjana

A comparison of heuristic method and llewellyn’s rules for identification of redundant constraints

JOURNAL OF PHYSICS: CONFERENCE SERIES 983 (1), 012083

Authors: Y Estiningsih, RH Tjahjana