INCOME AS A WORE GENERAL OPTIMIZATION CRITERION AS REGARDS AVAILABILITY AND REPLACEMENT COSTS IN DETERMINING THE OPTIMAL PERIOD OF PREVENTIVE REPLACEMENT

This paper discusses a procedure for determining the optimal period of preventive replacement of elements with increasing failure rate when the criterion is income per operating time unit.It is shown that income per operating time unit and its complementary value of the sum of Repair shampoo losses due to system dwell and replacement costs represen

As the economy continues to develop and technology advances, there is an increasing societal need for an environmentally friendly ecosystem.Consequently, natural gas, known for its minimal greenhouse gas emissions, has been widely adopted as a clean energy alternative.The accurate prediction of short-term natural gas demand poses a significant Acet

We present a known plaintext attack (KPA) on a recently proposed fully homomorphic cryptosystem (FHC), based on the problem of big integers factoring.We show that the considered FHC is insecure against KPA even if only one Bracelet pair (plaintext, ciphertext) was intercepted by an adversary.The complexity of the proposed KPA depends polynomially o

Porous ceramic roof-tile waste aggregate (PCA), which is a recycled material, is an effective internal curing material for concrete.Part of the aggregate is replaced with saturated internal curing material to supply internal water into the cement paste continuously.Internal water is effective to promote the hydration of cement paste, especially in

Introduction.The aim of the present study was to determine the effects of vitamins D and E on the proliferation, morphology, and differentiation of human dental pulp stem cells (hDPSCs).Methods.In this in vitro experimental study, hDPSCs were isolated, characterized, and treated with vitamins D and E, individually and in combination, utilizing diff