A wheel invented three times

Drowning and three-wheel strollers.

A Randomized Comparative Study Between Three Times And Five Times Weekly Phototherapy With NBUVB For Treating Chronic Plaque Type Psoriasis

Background: Psoriasis is a chronic inflammatory skin disease that is estimated to affect 0.6% to 4.8% of the general population. The optimum number of NB-UVB phototherapy sessions is yet to be determined. The aim of this study was to compare therapeutic effects of NB-UVB in treating chronic plaque type psoriasis three times weekly vs. five times weekly. Materials and Methods: This study was des...

Three Results on Cycle-Wheel Ramsey Numbers

Given twographsG1 andG2, theRamseynumber R(G1,G2) is the smallest integer N such that, for any graph G of order N , either G1 is a subgraph of G, or G2 is a subgraph of the complement of G. We consider the case that G1 is a cycle and G2 is a (generalized) wheel. We expand the knowledge on exact values of Ramsey numbers in three directions: large cycles versus wheels of odd order; large wheels v...

A Three-phase Hybrid Times Series Modeling Framework for Improved Hospital Inventory Demand Forecast

Background and Objectives: Efficient cost management in hospitals’ pharmaceutical inventories have the potential to remarkably contribute to optimization of overall hospital expenditures. To this end, reliable forecasting models for accurate prediction of future pharmaceutical demands are instrumental. While the linear methods are frequently used for forecasting purposes chiefly due to their si...

A three-stage assembly flow shop scheduling problem with blocking and sequence-dependent set up times

This paper considers a three-stage assembly flowshop scheduling problem with sequence-dependent setup < /div> times at the first stage and blocking times between each stage in such a way that the weighted mean completion time and makespan are minimized. Obtaining an optimal solution for this type of complex, large-sized problem in reasonable computational time using traditiona...