images are superimposed on B-mode images with a translucent color scale. In the clinical measurement, elasticity images for breast and prostate cancer were obtained from more than 50 subjects, respectively. Some results showed the high availability of the elasticity image, that is, visualization of the expansion area of a tumor and detection of a small size (<5mm) of non-invasive ductal carcino...

While there has been a great deal of excitement in view of M-commerce, very little is actually known about conditions and critical success factors for successful introduction of the 3rd generation mobile network services here in Malaysia. This study investigates the factors for successful diffusion of 3G network services and their role in advancing an interactive marketplace. 3G which simply me...

3rd generation mobile communication networks (3G) have been heralded as a paradigm shift that will irreversibly change the structure of the telecommunications industry. In an ideal "3G world", users will be offered ubiquitous access to an abundance of value-added services (VASs), which will be typically the result of co-operation between many contributing market players in the frame of innovati...

Certificate based authentication of parties provides a powerful means for verifying claimed identities, avoiding the necessity of distributing shared secrets beforehand. Whereas Wi-Fi networks present security deficiencies, they manage to highly penetrate into the wireless market in a great degree due to their low cost, easy administration, great capacity, IP-oriented nature, etc. Considering W...

In 2002 wireless phone connections surpassed the number of wired connections globally and became the primary communications infrastructure for all but the largest firms in many developing countries. New, third generation (3G) wireless networks promise to provide mobile voice and multimedia data to users worldwide. 3G is more advanced than first generation (1G), analog mobile services that provi...

The 3G-324M is a derivative of the ITU-T H.324 standard which is for low bit rate multimedia communication. H.324 and several mobile specific annexes are usually referred to as H.324M (M stands for mobile). Then the 3GPP adopted the H.324M with some modifications in codecs and error handling requirements to create the 3G-324M standard. In order to support enhanced and delay sensitive video serv...

Adaptive antenna arrays have recently been introduced to cope with the high capacity required by the 3 generation (3G) wireless communications systems. As adaptive antenna arrays focus narrow high gain beams towards the desired user and nulls towards interferers, both coverage and capacity of the network can be improved. To establish the performance gain that a smart antenna can deliver in a 3G...

treatment of 10-bromoanthralin (1) with several thiophenols (2) gave the corresponding 10-arylthioanthralins (3) in high yields. oxidation of thioanthralins (3a-c) and (3k-m) using an excess of m-chloroperbenzoic acid gave the corresponding sulfones (4a-c) and (4k-m) in good yields. oxidation of thioanthralins (3d-f) gave a mixture of the corresponding sulfones (4d-f) and anthralin-10,10'-dehyd...