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Simplified Assistive Devices for Upper Limbs
Ryoichi Suzuki,Nobuaki Fujiki,Shigehiko Furuya,Eidai Ito,Nobuaki Kobayashi,Eberhard P. Hofer 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10
The purpose of this research is to develop an assistive device for upper limbs. The disturbance estimation property of the internal model control is applied to detect motion intention of users. The experimental prototype of the assistive device for upper limbs is developed to evaluate the proposed control method. Effectiveness of the proposed method is verified by experiments. The experimental results include also that muscular activities occur in several muscles using surface electromyography. The proposed device is expected to maintain residual function of upper limbs.
Nishimura,Y.,Suzuki,S.,조백현,박진수,김병묵 大韓成形外科學會 1995 Archives of Plastic Surgery Vol.22 No.4
The general principle of treating a giant pigmented nevus is total resection of the lesion to prevent malignant change, followed by coverage of the skin defect with either flap or free skin graft. The problem in giant pigmented nevus lies in that enough skin to cover such a large defect is not readily available. The authors have developed a bilayer artificial skin composed of an upper silicone sheet and a lower collagen sponge sheet, and have applied it clinically with success. In using the artificial skin, the lower sheet is spontaneously converted to synthesized connective tissue matrix similar to dermis through the invasion of fibroblasts and capillaries, which allows for an easy take of a secondary skin graft. There is no significant histological and cosmetic difference between the area treated with the artificial skin plus very thin split thickness skin graft(0.2mm) and that treated with ordinary split thickness skin graft(about 0.5mm). Our recent experience with the use of an artificial skin combined with a very thin split thickness skin graft would be the best solution of the problem, at least at this stage of the research development, because it permits harvesting skin graft from the same site twice or more times, multiplying the usable skin areas in effect.
엄순찬,스즈키 시게히코,니시므라 요시히코,김용배,양순재 大韓成形外科學會 1998 Archives of Plastic Surgery Vol.25 No.8
Application of local flaps for releasing postburn scar contracture has been limited because of a problem of invisible loss, difficulty to obtain the satisfactory result against correction of limitation of motion and possibility of contour deformity. However, proper use of local flaps, accurate designs and complete wound compression for a long term after operation enable to obtain good results in correction of some cases of postburn scar contracture. It will be related to reduce unsightly scaring when contractures are released. For this purpose, we have used a modified planimetric Z-plasty, a subcutaneous pedicle flap, a new classification V-Y plasties which was proposed based on the new concept and their combination. Proper application of local flaps corresponding to the degree of contracture and shape of burn scar have enabled to increase the use of local flaps against correction of postburn scar contracture during our past 15 years, from 1982 to 1997, we treated 235 cases of postburn scar or scar contracture in various regions except for the face. Of these, 177 cases were applicated with local flaps and we could have a good results in both aspects of function and appearance. We report our operative methods, a criterion to application of local flaps and representative results.
Dynamic Modulus of Three-Layer Boards with Different Furnish and Shelling Ratio
Muhammad Navis Rofii,Tibertius Agus Prayitno,Shigehiko Suzuki 한국목재공학회 2016 목재공학 Vol.44 No.2
This aims of this study were to investigate the relationship between non-destructive evaluation (NDE) and actual bending properties of particleboard, and to predict the bending properties of three-layer particleboard. Three kinds of raw materials, i.e. Hinoki (Chamaecyparis obtusa Endl.) strand, knife-milled Douglas-fir (Pseudotsuga manziesii (Mirb) Franco), and hammer-milled matoa (Pometia spp.) obtained from wooden industry, were utilized as furnish for experimental panel with methylene diphenyl diisocyanate (MDI) resin as binder. The NDE test was conducted by hit sounds using an FFT analyzer according to the spectrum peak of wave frequency, while the static bending test was conducted according to JIS A-5908. The results reveal that the dynamic Young’s modulus as an NDE test has a potential for being used to predict the elastic bending of particleboards by a specific equation for adjusting its proper values. The values of NDE and static test are significantly different with a deviation range at 3-20%. The bending stiffness of three-layer particleboards manufactured from different wood species is predictable by observing the bending stiffness of two elements based on the thickness of its layers. The predicted values of bending stiffness and static test are significantly different with a deviation range at 5-24%.
Enhanced wound healing by an epigallocatechin gallate‐incorporated collagen sponge in diabetic mice
Kim, HakHee,Kawazoe, Takeshi,Han, Dong‐,Wook,Matsumara, Kazuaki,Suzuki, Shigehiko,Tsutsumi, Sadami,Hyon, Suong‐,Hyu Blackwell Publishing Inc 2008 Wound repair and regeneration Vol.16 No.5
<P><B>ABSTRACT</B></P><P>Epigallocatechin‐3‐<I>O</I>‐gallate (EGCG), the major polyphenolic compound present in green tea, has potent anti‐oxidant and free radical‐scavenging activities. In this study, various concentrations (10, 100, and 1,000 ppm) of EGCG were incorporated into a collagen sponge (CS) in order to investigate its healing effects on full‐thickness wounds created in type 2 diabetic mice. After 14 days, the residual wound size of the mice treated with 10 ppm EGCG‐incorporated collagen sponge (E‐CS) decreased significantly faster than that of the other mice. Moreover, significant increases in the degree of reepithelialization, the thickness of the granulation tissue, and the density of the capillaries were also histologically observed in the wound sites exposed to 10 ppm E‐CS in comparison with the others. Furthermore, 10 ppm E‐CS resulted in significant increases in the immunoreactivity of Ki‐67 (reepithelialization at the wound site), CD31 (formation of blood vessels), and α‐smooth muscle actin (the induction of myofibroblasts across the dermis). These results suggest that a CS incorporated with EGCG at low concentrations can enhance wound healing in diabetic mice by accelerating reepithelialization and angiogenesis as well as improving the cellular reorganization of granulation tissue by triggering the activity of myofibroblasts.</P>