BACKGROUND Despite the growing acceptance of laparoscopic colon surgery, an abdominal incision is needed to remove the specimen and perform an anastomosis. Recently, natural orifice specimen extraction (NOSE) and intracorporeal anastomosis have been proposed to minimize abdominal wall trauma and improve the quality of laparoscopic colon resections Objective: To evaluate the feasibility and safe...

Given a 3-axis cutter motion we ask for a geometric representation of the resulting surface. Our discrete solution starts with a regular array of height values initialized e.g. to some constant value. The cutter is positioned at each array element of the scan-converted motion path, and the heights of the elements in the array covered by the cutter are decreased according to the cutter's geometr...

This Article is brought to you for free and open access by the Ocean, Earth & Atmospheric Sciences at ODU Digital Commons. It has been accepted for inclusion in OEAS Faculty Publications by an authorized administrator of ODU Digital Commons. For more information, please contact [email protected]. Repository Citation Anderson, Robert F.; Mawji, Edward; Cutter, Gregory A.; Measures, Christop...

+*Koyama, T; *Sugano, N; *Miki, H; **Murakami, A; *Nishii, T; *Sato, Y; *Yoshikawa, H; *Tamura, S; *Ochi, T +*Osaka University Graduate School of Medicine, Osaka, Japan. [email protected] Introduction It has been reported that almost 100% of hips with extensive type of osteonecrosis of the femoral head (ONFH) show progression of collapse if they do not receive any surgical treatm...

The riotion of “cottipittatiotial crcgtitig ” focuses oti the tiiinierous ~ * a y s in which coniputatiotial niedia tilay be used to expand the expressive range of traditional editcational crufts. One itnportant dimension of this approach involves a close re-examination of titi issue often taketi f o r grtitited iti educational technologytinniely, the desigri and use of I/O devices. The next de...

In the various working field, vibration may cause injurious to human body. Especially, in case of the vibration which is constantly and repeatedly transferred to the human. That gives serious physical problem, so called, Reynaud phenomenon. In this paper, we propose a vibration transmissibility reduction module with flexure mechanism for personal tools. At first, we select a target personal too...

The overall goal of the research is the integration of geometric and mechanistic models for cutting process simulation and feedrate optimization. Five-axis milling methods are used in industries such as aerospace, automotive and mold for free-form surface machining. In these process, surface quality and material removal rate are of very important. Conservative cutting parameters have been mostl...

Helical milling operations are used to generate or enlarge boreholes by means of a milling tool. The bore diameter can be adjusted through the diameter of the helical path. The kinematics of helical milling on a three axis machine tool is analysed firstly. The relationships between processing parameters, cutting tool geometry characters with machined hole feature are formulated. The feed motion...

The stability of interrupted cutting in a single degree of freedom milling process was studied experimentally. An instrumented flexure was used to provide a flexible workpiece with a natural frequency comparable to the tooth pass frequency, mimicking high speed milling dynamics. The displacement of the system was sampled continuously and periodically once per cutter revolution. These data sampl...