In this work we will show how non-qualified electronic signatures and time stamps can be efficiently enhanced in order to equip them with similar features as qualified ones. In particular we will show how non-qualified electronic signatures can be used in business processes which require the written form. Furthermore we will show how to construct ”interval-qualified” (IQ) time stamps which may ...

The Postal and Treasury Savings Stamp Systems and their associated stamps (and collection certificates and booklets) played an integral role in our country’s history during the twentieth century, especially during both World Wars. These savings stamp systems were in existence, in one form or another, from 1911 through 1970 – about sixty years. The Postal Savings Account System was officially ab...

In this paper, we describe the development of microcontact printing stamps from photopatternable silicone. The photopatternability of this material enables convenient and fast stamp fabrication, and allows rapid patterning of substrates for culturing biological cells. Microcontact printing stamps made of the photopatternable silicone with linewidths as small as 2 lm were fabricated and reliable...

Medical philately provides a useful medium for the study of medical history. There are a handful of Iranian stamps which have been issued with a medical theme. This report briefly reviews the history of Iranian medicine through Iranian commemorative postage stamps. Some notable stamps are presented.

Classical ink stamps and seals used for authentication of a document content have become relatively easy to forge by the scan&print technique since the technology is available to general public. For environments where a huge volume of documents is processed, an automatic system for verification of authenticity of stamps has been developed in the scope of this work. The process of stamp authenti...