Akihito Morimoto

Learn More
This paper compares by computer simulation the achievable throughput performance employing fast packet scheduling algorithms focusing on the throughput of each user in High Speed Downlink Packet Access (HSDPA). Three packet scheduling algorithms are employed: the Maximum carrier-to-interference power ratio (CIR), Proportional Fairness (PF), and Round Robin(More)
OBJECTIVE Although surgical biliary bypass for nonresectable periampullary tumors is superior to endoscopic stent placement, the latter has become popular because of the "minimally invasive" approach. Laparoscopic biliary bypass would appear to offer the advantages of both. However, this technique remains technically difficult using existing(More)
In order to cope with the dramatic growth in the amount of data traffic, future radio access networks may consist of a large number of small cells that are densely deployed. In this paper, we focus on the identification of densely deployed small cells based on hierarchical synchronization channels specified in the Long Term Evolution (LTE) standard. The(More)
Modern surgical methods which utilize microscopes have allowed medical professionals to visualize the surgical field on the order of microns. This new found visual capacity has created a performance gap between a surgeon's visual skills and manipulative skills that surgical robotics have the capability to remedy. Robotics can be used as an aid to the(More)
UNLABELLED GENERAL: A force sensor has been designed and fabricated that will fit to existing laparoscopic grasping forceps (Babcocks) from Ethicon Endosurgery Inc. The goal of the sensor development is to provide tool-tissue force information to the surgeons so that surgeons can regain the sense of touch that has been lost through laparoscopy. Eventually,(More)