This article aims to analyze the situation of Romanian companies from an environmental point of view. Environmental issues are addressed very often nowadays, and they reach and affect every domain, including the economical one. Implementing an environmental management system will not only help the companies to comply with laws and regulations, but, above all, will offer them an important compet...

Biotechnology is important solution to many synthesis issues. It offers less energy intensive, economical and easy solution to synthesis of many chemicals. The choice of substrate, enzyme and reaction conditions needs careful study. Ethanol, citric acid, lactic acid, amino acids, proteins and many other compounds are produced by biochemical pathways. It is said that 80 percent of the process co...

• The combination of signals planned to be available for civil use from the U.S.'s Global Positioning System (GPS) and the former U.S.S.R.'s GLONASS system offers the promise of an accurate and economical sole-means navigation system for civil aviation. An FAA-sponsored program at Lincoln Laboratory has examined the technical issues associated with the integrated use of the two autonomous syste...

 Cost-competitive with petroleum fuels  Long-term stable price for budget forecasting  Made from sustainable, renewable Biomass residuals  Storable and pumpable liquid similar to petroleum fuels  Clean burning fuel without the sulfur and particulates from petroleum fuels  Low greenhouse gas emissions Sustainability issues have become an important part of the supply chain for operati...

First-order logic (FOL) is undecidable — that is, no algorithm exists that can decide whether a formula of FOL is valid or not. However, there are various fragments of FOL that are known to be decidable. FO, the two-variable fragment of FOL, is one of such languages [1,2]. FO is a first-order language where formulas have maximally two variables, no function symbols, but possibly do have equalit...

Several models have been proposed for scheduling the preventive maintenance (PM) of complex repairable systems in industry. These are often application-speci"c and some make unrealistic assumptions about stationarity of the process and quality of repairs. We investigate two principal types of general model, which have wider applicability. The "rst considers "xed PM intervals and is based on the...

Distributed software development (DSD) is becoming popular due to the potential of delivering highquality software products in a timely and economical manner. Recently, practitioners started to apply agile software development methods to their DSD environment. However, there are not many empirical researches that have reported whether the agile methods are really viable for distributed software...

The integration of distributed sources into existing networks brings up several technical, economical and regulatory questions. In terms of physical integration, protection is one of the major issues. Therefore new protection schemes for both distributed generators (DG) and utility distribution networks have been developed in the recent years, but there are still open questions. This document i...

The study of culture in international relations theories takes a wide range of complex issues, which without enough perception about these issues, certainly our understanding about the role of culture in international relations theories will be incomplete. Since in real world the study of international affairs is best understood as traditional competition between traditional mainstream theories...

Switched networks are receiving much attention and supplying a major class of interconnect networks. This paper discusses major issues in switch design and switch interconnects. Due to the importance of high-speed switches in building switched LANs, major design issues are studied and several commercial switches are reviewed. Among different techniques used in switch design, cut-through switchi...