AGGREGATION AND DISAGGREGATION IN MARKOV DECISION MODELS FOR INVENTORY CONTROL

In recent years, the rapid technological advancements, the increased economic uncertainty, and the globalization of economic activities have resulted in fierce competition, and more sophisticated and demanding customers. These characteristics of the new economic environment are translated to short product life cycles, increased demand for customized products, and quick response to customers’ an...

This study aims to address the challenge of implementing Lean philosophy in Small and Medium Enterprises (SMEs) fill research gap regarding application vehicle seat upholstery maintenance/repairing processes. The tools applied a case an industry seats were as follows: Value Stream Mapping, Spaghetti Diagram, Gemba, 5S, Standardized Work, Kaizen, Kanban, Poka-Yoke tools. A Decision Support Metho...

The development of new technology enables the comfort service becoming an important requirement in the air travel industry. Long haul air travel may cause different physiological and psychological discomfort of aircraft passenger. Most of the aircraft company treats the passenger comfort as a main priority for the user’s acceptance of their airline. In order to improve the aircraft passenger bo...

There are many types of car suspensions control, H∞ control of vehicle suspension is studied in the literature for a brave time ago. We can define active suspensions as control systems incorporating a parallel spring and an electronically controlled damper. The contribution of this paper relies on H∞ control design to improve comfort and road holding of the car, and on control validation throug...

The purpose of this study was to test the hypothesis whether weight transfer during sit-to-stand (STS) is the result of coordinated ground forces exerted by buttocks and feet before seat-off. Whole-body kinematics and three-dimensional ground forces from left and right buttock as well as from left and right foot were recorded for seven adults during STS. We defined a preparatory phase from onse...

The seat dip effect is a low-frequency attenuation affecting sound travelling at grazing incidence over seating in auditoria. It is caused by scattered sound from the seats interfering with sound travelling directly from the source on the stage. In outdoor noise control, the simple single noise barrier gives good attenuation at high frequencies, but is limited by diffraction at low frequencies....

INTRODUCTION Trauma is a major cause of death and disability worldwide. A quarter of all fatalities due to injury occur due to road traffic crashes with 90% of the fatalities occurring in low- and medium-income countries. Poor compliance with the use of seat belts is a problem in many developing countries. The aim of this study was to evaluate the level of seatbelt compliance in motor vehicles ...

BACKGROUND The effects of seat belt laws and public education campaigns on seat belt use are assessed on the basis of observational or self-reported data on seat belt use. Previous studies focusing on front seat occupants have shown that self-reports indicate a greater seat belt usage than observational findings. Whether this over-reporting in self reports applies to rear seat belt usage, and t...