Communication in Biomathematical Sciences https://journals.itb.ac.id/index.php/cbms <p><em><a href="http://journals.itb.ac.id/index.php/cbms"><img class="imgdesc" src="http://journals.itb.ac.id/public/site/images/budini/cbms.png" alt="" width="146" height="200" /></a></em></p> <p><strong>Communication in Biomathematical Sciences</strong> welcomes full research articles in the area of <em>Applications of Mathematics in biological processes and phenomena</em>. Review papers with insightful, integrative and up-to-date progress of major topics are also welcome. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere.<br /><br />The editorial board of CBMS is strongly committed to promoting recent progress and interdisciplinary research in Biomatematical Sciences.</p> <p>e-ISSN: <a title="ISSN PDII LIPI" href="http://u.lipi.go.id/1486034764" target="_blank" rel="noopener">2549-2896</a></p> <p>Accreditation <a href="http://arjuna.ristekbrin.go.id/files/info/Hasil_Akreditasi_Jurnal_Nasional_Periode_1_Tahun_2020.pdf">No. 85/M/KPT/2020</a></p> <p><a href="https://statcounter.com/p12002390/?guest=1">View My Stats</a></p> en-US esoewono@math.itb.ac.id (Prof.Dr. Edy Soewono) dini.permatasari@itb.ac.id (Dini Sofiani Permatasari) Fri, 07 May 2021 09:46:54 +0700 OJS 3.2.1.0 http://blogs.law.harvard.edu/tech/rss 60 The Effects of Fogging and Mosquito Repellent on the Probability of Disease Extinction for Dengue Fever https://journals.itb.ac.id/index.php/cbms/article/view/14822 <p>A Continuous-Time Markov Chain model is constructed based on the a deterministic model of dengue fever transmission including mosquito fogging and the use of repellent. The basic reproduction number (R0) for the corresponding deterministic model is obtained. This number indicates the possible occurrence of an endemic at the early stages of the infection period. A multitype branching process is used to approximate the Markov chain. The construction of offspring probability generating functions related to the infected states is used to calculate the probability of disease extinction and the probability of an outbreak (P0). Sensitivity analysis is shown for variation of control parameters and for indices of the basic reproduction number. These results allow for a better understanding of the relation of the basic reproduction number with other indicators of disease transmission.</p> Glenn Lahodny Jr., Mona Zevika Copyright (c) 2021 Communication in Biomathematical Sciences https://journals.itb.ac.id/index.php/cbms/article/view/14822 Fri, 07 May 2021 00:00:00 +0700 Quantitative Measure to Differentiate Wicket Spike from Interictal Epileptiform Discharges https://journals.itb.ac.id/index.php/cbms/article/view/15437 <p>A number of benign EEG patterns are often misinterpreted as interictal epileptiform discharges (IEDs) because of their epileptiform appearances, one of them is wicket spike. Differentiating wicket spike from IEDs may help in preventing epilepsy misdiagnosis. The temporal location of IEDs and wicket spike were chosen from 143 EEG recordings. Amplitude, duration and angles were measured from the wave triangles and were used as the variables. In this study, linear discriminant analysis is used to create the formula to differentiate wicket spike from IEDs consisting spike and sharp waves. We obtained a formula with excellent accuracy. This study emphasizes the need for objective criteria to distinguish wicket spike from IEDs to avoid misreading of the EEG and misdiagnosis of epilepsy.</p> Suryani Gunadharma, Ahmad Rizal, Rovina Ruslami, Tri Hanggono Achmad, See Siew Ju, Juni Wijayanti Puspita, Sapto Wahyu Indratno, Edy Soewono Copyright (c) 2021 Communication in Biomathematical Sciences https://journals.itb.ac.id/index.php/cbms/article/view/15437 Fri, 07 May 2021 00:00:00 +0700 Peristaltic-Ciliary Flow of A Casson Fluid through An Inclined Tube https://journals.itb.ac.id/index.php/cbms/article/view/15487 <p>The paper is concerned with the peristaltic-ciliary transport of a viscoplastic fluid (Casson fluid) through an inclined cylindrical tube. The peristalsis-cilia induced motion is analysed in the moving frame of reference under the lubrication approximations. Solutions to the flow characteristics petering to yielded and unyielded regions are obtained. The effects of various physical parameters on the axial velocity, the pumping characteristics, the pressure rise, and the frictional force over one wavelength, along with the trapping phenomenon are presented through graphs. Further, the peristaltic flow and peristaltic-ciliary flow results are compared. It is noticed that the axial velocity and the size of trapping bolus in the unplug flow region decrease with an increase in the yield stress. In addition, the axial velocity and the axial pressure gradient in the peristaltic-ciliary pumping are higher than those in the peristaltic pumping.</p> Saravana Ramachandran, Kuppalapalle Vajravelu, K.V. Prasad, S. Sreenadh Copyright (c) 2021 Communication in Biomathematical Sciences https://journals.itb.ac.id/index.php/cbms/article/view/15487 Fri, 07 May 2021 00:00:00 +0700 A Nonlinear Observer to Estimate the Effective Reproduction Number of Infectious Diseases https://journals.itb.ac.id/index.php/cbms/article/view/15798 <p>In this paper, we design a Nonlinear Observer (NLO) to estimate the effective reproduction number (Rt) of infectious diseases. The NLO is designed from a discrete-time augmented Susceptible-Infectious-Removed (SIR) model. The observer gain is obtained by solving a Linear Matrix Inequality (LMI). The method is used to estimate Rt in Jakarta using epidemiological data during COVID-19 pandemic. If the observer gain is tuned properly, this approach produces similar result compared to existing approach such as Extended Kalman filter (EKF).</p> Agus Hasan Copyright (c) 2021 Communication in Biomathematical Sciences https://journals.itb.ac.id/index.php/cbms/article/view/15798 Fri, 07 May 2021 00:00:00 +0700