Abstract. The Lorentz covariant theory of precise Doppler measurements (PDM) based on the retarded Liénard-Wiechert solution of the Einstein equations is described. An exact solution of equations of light propagation in the field of arbitrary moving bodies, which drastically extends the range of applicability of the new theory of PDM, is obtained. An explicit formula for the gravitational shift...

With increasing frequency, the developing countries and the people living there are being affected by disasters. More and more often, development efforts are being destroyed. The reason for this trend is their growing vulnerability, which in turn is the result of economic and social development processes, such as the expansion of settlements and agricultural land in risk areas. The economic a...

The use of 3-D Computer-aided Design (CAD) systems in engineering design and manufacturing has popularized the concept of the virtual product database. Product Data Management (PDM) and similar computer-based information management tools have increasingly been implemented to help manage this product database. Just as 3-D modeling is becoming an important component of the engineering graphics cu...

a r t i c l e i n f o For the 'under maintained' and 'over maintained' problems of traditional preventive maintenance, a new predictive maintenance policy is developed based on process data in this article to overcome these disadvantages. This predictive maintenance method utilizes results of probabilistic fault prediction, which reveals evolvement of the system's degradation for a gradually de...

Knowledge related aspects of businesses processes are often ignored or referred to as a black box in process improvement projects. As a result they remain untouched and it is left to the knowledge workers to establish routines and workflows that deliver results needed to fulfill the business processes needs. This often results in lowered efficiency, redundancy of knowledge related activities, l...

Product design is an evolving process which is characterized with creativity and uncertainty. The task management in this process is different from traditional ones because it involves more specific factors such as user specifications, product design specifications, reengineering, design process, and design data. In this article, we aim to analyze product design process with the viewpoint of pr...