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Volume 7 Number Mathematics and Applied Mathematics Year 2021

11 articles in this issue 

Ari Dwi Hartanto(1*), Al. Sutjijana(2), (1) Universitas Gadjah Mada, Yogyakarta, Indonesia (2) Universitas Gadjah Mada, Yogyakarta, Indonesia (*) Corresponding Author

The phenomena of unknown gain or offset on communication systems and modern storages such as optical data storage and non-volatile memory (flash) becomes a serious problem. This problem can be handled by Pearson distance applied to the detector because it... see more

Pags. 1 - 8  

Fauziyah(1), Evita Purnaningrum(2*), (1) Universitas PGRI Adi Buana Surabaya, Surabaya, Indonesia (2) Universitas PGRI Adi Buana Surabaya, Surabaya, Indonesia (*) Corresponding Author

Long-term stock investment development is carried out by means of portfolio optimization. Selection of stocks for portfolios is not only based on high-value stock prices but also takes into account their fluctuations. Estimation of future stock price fluc... see more

Pags. 20 - 30  

Siti Hadijah Hasanah(1*), (1) Universitas Terbuka, Indonesia (*) Corresponding Author

Multivariate Adaptive Regression Splines (MARS) used to model the active student’s status in the Department of Statistics at Universitas Terbuka and determine the factors that influence the response variable. This study consists of 9 variables, namely gen... see more

Pags. 51 - 58  

Nihaya Alivia Coraima Dewi(1*), Fitroh Resmi(2), Pukky Tetralian Bantining Ngastiti(3), (1) Universitas Billfath, Lamongan, Indonesia (2) Universitas Billfath, Lamongan, Indonesia (3) Universitas Billfath, Lamongan, Indonesia (*) Corresponding Author

This study aims to determine the optimization of balanced dietary composition for pregnant women. Determination of the optimization of balanced food is carried out by forming a linear model along with boundary conditions and objective functions, as well a... see more

Pags. 59 - 66  

Muhammad Fajar(1*), Wahyudi Wahyudi(2), (1) Badan Pusat Statistik, Indonesia (2) Badan Pusat Statistik, Indonesia (*) Corresponding Author

Aim of this study is to make parametric modeling of the COVID-19 epidemic growth curve so that the maximum value and time at that point can be obtained from the cumulative cases of COVID-19. The data used in this study is the cumulative number of positive... see more

Pags. 67 - 73  

Vivin Umrotul M. Maksum(1), Dian C. Rini Novitasari(2*), Abdulloh Hamid(3), (1) UIN Sunan Ampel Surabaya, Surabaya, Indonesia (2) UIN Sunan Ampel Surabaya, Surabaya, Indonesia (3) UIN Sunan Ampel Surabaya, Surabaya, Indonesia (*) Corresponding Author

COVID-19 is a disease or virus that has recently spread worldwide. The disease has also taken many casualties because the virus is notoriously deadly. An examination can be carried out using a chest X-Ray because it costs cheaper compared to swab and PCR ... see more

Pags. 74 - 85  

Yuyun Monita(1*), Putroue Keumala Intan(2), (1) UIN Sunan Ampel Surabaya, Surabaya, Indonesia (2) UIN Sunan Ampel Surabaya, Surabaya, Indonesia (*) Corresponding Author

The condition in which an individual is affected by TB and HIV/AIDS in his body is called a TB-HIV/AIDS coinfection. This research aims to minimize the populations of TB-HIV/AIDS coinfection with a minimum expenditure on medical expenses, that means minim... see more

Pags. 96 - 106