The Perspective of Concept Sustainability

AbstractThe issue of sustainability has received various treatments over the past two decades. If in the neoclassical logic the concept of sustainable growth receives a quantitative understanding (i.e. what is called currently weak sustainability, dominant in environmental economic policies), the heterodox positions in recent years (i.e. what is named strong sustainability, ecological economics etc) rather emphasizes the qualitative side of growth (i.e. sustainable growth, human development etc). Our main intention is to argue for the last conceptual position of sustainability, where the efficient allocation of resources, the increase of employment and the inter-generational preservation of the natural environment are inherently constitutive of the concept of sustainability

History and Point in Time in Enterprise Applications

First part points out the main differences between temporal and non-temporal databases. In the second part, based on identification of the three main categories of time involved in database applications: user-defined time, valid time and transaction time, some relevant solutions for their implementation are discussed, mainly from the point of view of database organization and data access level of enterprise applications. The final part is dedicated to the influences of historical data in the business logic and presentation levels of enterprise applications and in application services, as security, workflow, reporting.temporal databases, non-temporal databases, user-define time, valid time, transaction time, enterprise application architecture, application services

History and Point in Time in Enterprise Applications

First part points out the main differences between temporal and non-temporal databases. In the second part, based on identification of the three main categories of time involved in database applications: user-defined time, valid time and transaction time, some relevant solutions for their implementation are discussed, mainly from the point of view of database organization and data access level of enterprise applications. The final part is dedicated to the influences of historical data in the business logic and presentation levels of enterprise applications and in application services, as security, workflow, reporting

Allosterism and signal transfer in DNA

We analysed the basic mechanisms of signal transmission in DNA and the origins of the allostery exhibited by systems such as the ternary complex BAMHI-DNA-GRDBD. We found that perturbation information generated by a primary protein binding event travels as a wave to distant regions of DNA following a hopping mechanism. However, such a structural perturbation is transient and does not lead to permanent changes in the DNA geometry and interaction properties at the secondary binding site. The BAMHI-DNA-GRDBD allosteric mechanism does not occur through any traditional models: direct (protein-protein), indirect (reorganization of the secondary site) readout or solvent-release. On the contrary, it is generated by a subtle and less common entropy-mediated mechanism, which might have an important role to explain other DNA-mediated cooperative effects

Management of the assisted instruction environment in economic higher education

The world has entered the Knowledge Age. Information Technology is gradually turning the world into an Information Highway Network. The development of technology has greatly accelerated the international flow of information, capital and commodities and speeded the growth of economic integration. At the same time, the cycle of technological development and commercialization is becoming shorter and shorter [Zhouying, 1999]. Information technology is bringing rapid and profound changes to higher education, as it has to virtually every process in our society. Productivity often suffers because is difficult and timeconsuming to conduct a team effort. A portal solution base on SharePoint Portal Server can greatly facilitate the process of bringing knowledge teachers together as a team to achieve educational goals by providing a single point to access: automated essential day-to-day email communication, management of contacts, calendars, and instant messages, shared facilities to allow small teams of teachers to contribute to team and project-focused Web site, track tasks and events, shortened web-publishing cycles by linking collaboration and publishing processes.colaborative platforms, web courses, online evaluation