This study aims to explore the concept of determining the buying price for scrap collectors because based on previous research studies there is a phenomenon that information is obtained that the inclusion of non-economic values Poster determines the purchase price of certain products.Researchers chose junk collectors as the object of research becau
An Analysis Method of Open Queueing Networks with a Degradable Structure and Instantaneous Repair Times of Systems
An unreliable open queueing network with Poisson arrivals is considered.For each queueing system the service and failures times are exponentially distributed random variables.The failures of systems lead to changes in the structure of the network and corresponding changes in the performance measures of the queueing network.It is assumed that the ti
High variability in transmission of SARS-CoV-2 within households and implications for control.
BackgroundSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) poses a high risk of transmission in close-contact indoor settings, which may include households.Prior studies have found a wide range of household secondary attack rates and may contain biases due to simplifying assumptions about transmission variability and test accuracy.Metho
OVARIAN AGING AND INFERTILITY TREATMENT
Background.Due to changes in the socio-economic environment the first pregnancy is being more often postponed to advanced age; an increasing number of women seek medical help for infertility in their late thirties.Degenerative processes in the ovary start as early as after 35 years of age.When the woman is over 38, the signs of hormonal changes occ