Today, there are two different ways to use computer. The first one is using standalone applications and another is using network services. Because user must install all program files into personal computer for standalone application, the cost of installing and updating application is very expensive. Online service is always constructed by using the model of a mainframe, so information is still administered in the centralized database and every user's operations must be processed in the web server. Because of the mature network infrastructure, people can use different ways to connect to Internet. More and more applications are changed to online services. That is also the ideal of Sun, "The Network is The Computer", and Sun announces Jini technology for the ideal. By using Jini technology, service providers can construct and deploy their services easily and users can find these services easily. Jini technology is based on Java, so Jini has many advantages of Java. Besides, there is a concept of federation in Jini technology. People can share resources in the same federation easily, but can not access resources in the other federation. In the other words, federations can not communicate with each other. In order to solve this problem, we design Service Portal for Jini federations, that let Jini federations can share their resources with others. In the Service Portal for Jini federations, we use "Service Proxy Forwarding" mechanism to forward service proxy objects inside Jini federations and use "Scalable Service Portal" mechanism to gather service proxy objects from different Jini federations. In our service portal system, we implement two application services to determine the reliability of the system. They are Stock Market System and Motor vehicles Presentation System.

Zugl.: Köln, Univ., Diss., 2009

Techn. Universiẗat, Diss., 2006--Darmstadt.

Stuttgart, FH, Diplomarb., 2002.

Nürtingen, FH, Diplomarb., 2004. / Betreuer: Barbara Kreis-Engelhardt.

Universität Hannover, Diss., 2009

Zugl.: Berlin, Techn. Univ., Diss., 2003 / Zusätzliches Online-Angebot unter http://dx.doi.org/10.1466/20100120.01

No description available.

In 1945 Blakemore and Lord published their work on the treatment of Banti's Syndrome by anastomosing the splenic to the left renal vein, or the portal vein to the inferior vena cava. In the same year Whipple (1945) classified portal hypertension into cases with an obstruction in the portal system outside the liver, and those with a block inside the liver, the result of hepatic fibrosis. The cases with extrahepatic blockage of the portal circulation present clinically as cases of Banti's Syndrome. In this latter group repeated haematemeses are a common, and often fatal symptom. The operation of portacaval anastomosis has as its main object the lowering of the pressure in the portal system, with a reduction in the frequency, and severity of the haematemeses. The operations are difficult and dangerous, and the patients suitable for operation must be selected carefully. The exact site of obstruction causing portal hypertension must be determined either at, or preferably before operation, as it will determine the type of operation. Thus an anastomosis between the portal vein and the inferior vena eava will be useless if haematemeses are the result of obstruction of the splenic vein.

The main use of sildenafil in human medicine is to treat erectile dysfunction. In veterinary medicine, sildenafil is most frequently used to treat pulmonary hypertension. The effects of sildenafil on the portal vasculature in the dog have not been previously evaluated. The purpose of this study was to evaluate the effects sildenafil has on the portal vasculature. The cross-sectional area of the aorta, cross-sectional area of the portal vein, and portal vein velocity were acquired in thirteen dogs prior to administration, 45 minutes, 90 minutes, and 120 minutes after the oral administration of sildenafil for the treatment of pulmonary hypertension. No statistically significant difference was detected between all measured values at all time points. Although this study had a small sample size, sildenafil does not have a significant effect on the size of the portal vasculature. Further studies with a larger sample size will be required to further evaluate the effects.