Takashi Kawabe

Learn More
The variegated Saintpaulia cultivar Thamires (Saintpaulia sp.), which has pink petals with blue splotches, is generally maintained by leaf cuttings. In contrast, tissue culture-derived progeny of the cultivar showed not only a high percentage of mutants with solid-blue petals but also other solid-color variants, which have not been observed from leaf(More)
BACKGROUND/AIMS Bile leak remains a serious complication after major hepatectomy. The usefulness of external biliary drainage to prevent intraperitoneal bile leak was studied. METHODOLOGY Thirty-nine patients who underwent major hepatectomy from April 1997 through June 2000 were studied. The bile leak test was performed to identify and close leaks(More)
The pathology and prognosis of hepatitis B surface antigen (HBsAg)-positive hepatocellular carcinoma (HCC) and hepatitis C virus antibody (HCVAb)-positive HCC is well documented. However, patients with HBsAg-negative/hepatitis B core antibody (HBcAb)-positive HCC are included with non-B non-C disease and have been characterized independently. A series of(More)
BACKGROUND/AIMS Patients with hepatic malignancies are often poor candidates for resection because of the lack of hepatic reserve as a result of coexisting cirrhosis or the presence of multiple tumors. The purpose of this study was to determine the safety and efficacy of open intraoperative radiofrequency ablation of unresectable hepatic malignancies with(More)
A search method using an evolutionary algorithm such as a genetic algorithm (GA) is very effective if the parameter is appropriately set. However, the optimum parameter setting was so difficult that each optimal method depending on each problem pattern must be developed one by one. Therefore, this has required special expertise and large amounts of(More)
Delivery route optimization is a well-known NPcomplete problem based on the Traveling Salesman Problem (TSP) involving 20-2000 cities though human oriented factors make the problem more complex. Despite of NP-completeness, the scheduling should be solved every time within interactive response time and below expert level error or local optimality,(More)
The paper introduces a Case Based Approximation method to solve large scale Traveling Salesman Problems in a short time with a low error rate. It is useful for domains with most solutions being similar to solutions that have been created. Thus, a solution can be derived by (1) selecting a most similar TSP from a library of former TSP solutions, (2) removing(More)
Due to the geographical distribution, different cognitive capacity, and different domain competency of workers or learners, many misunderstandings can occur during distributed remote collaboration, leading to inefficient discussions and undesired results. To make remote collaboration more efficient and dependable, enriching cyberspace through adaptively(More)