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Article
Publication date: 26 June 2019

Naoki Saito, Toshiyuki Satoh and Norihiko Saga

The purpose of this study is to confirm that the body weight load reduction system which is developed by us is effective to reduce the knee joint force of the walking…

Abstract

Purpose

The purpose of this study is to confirm that the body weight load reduction system which is developed by us is effective to reduce the knee joint force of the walking user. This system is driven by pneumatic artificial muscle, functions as a mobile walking assist system.

Design/methodology/approach

The developed body weight load reduction system driven by rubber-less artificial muscle (RLAM) was tested experimentally. Simple force feedback control is applied to the RLAM. The system moves as synchronized with vertical movement of the walking user. The knee joint force during walking experiments conducted using this system is estimated by measurement of floor reaction force and position data of lower limb joints.

Findings

The knee joint force during walking is reduced when using this system. This system contributes to smooth change of knee joint force when the lower limb contacts the floor.

Practical implications

This lightweight body weight load reduction system is particularly effective for realizing easy-to-use mobile walking assist system.

Originality/value

A lightweight body weight load reduction system using pneumatic artificial muscle is a novel proposal. Additionally, these new evaluation results demonstrate its effectiveness for reducing knee joint force during walking.

Details

Industrial Robot: the international journal of robotics research and application, vol. 46 no. 5
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 22 June 2010

Koichi Kirihara, Norihiko Saga and Naoki Saito

The purpose of this paper is to describe the development of a device to support rehabilitation of a patient's upper limb motion.

Abstract

Purpose

The purpose of this paper is to describe the development of a device to support rehabilitation of a patient's upper limb motion.

Design/methodology/approach

The device has five degrees of freedom by virtue of its link mechanism. It consists of Joints 1‐5. Apparatus for use in so‐called welfare applications, such as this device, must be safe, flexible, and lightweight. A pneumatic cylinder, arranged and integrated with the device, was used to operate it. The device has two rehabilitation modes corresponding to different rehabilitation contents. The first mode is the muscular recovery and movable region expansion mode (Mode A). The second mode is a practical function recovery mode (Mode B). A compliance control and a position control system are applied for those modes.

Findings

By arranging the pneumatic cylinder optimally, results show that the device has compact and wide operating range and compliance‐control performance for Mode A. Position‐control performance for Mode B was verified experimentally. Moreover, the paper evaluates the effectiveness of the device and its control system through electromyography, which confirms that the developed device can support a patient's rehabilitation training.

Originality/value

The device has a simple link mechanism and an attached pneumatic cylinder, thereby constituting a lightweight and compact mechanism. The device has two rehabilitation modes corresponding to different rehabilitation contents. Using the device, a patient can conduct muscular power recovery training, movable region expansion training, and upper limb practical function recovery training.

Details

Industrial Robot: An International Journal, vol. 37 no. 4
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 1 April 1985

Norihiko Suzuki

The transferability of the Japanese management system to the American business environment has recently provided a focal point of argument among Americans. This signifies…

Abstract

The transferability of the Japanese management system to the American business environment has recently provided a focal point of argument among Americans. This signifies a drastic change of trend not only for members of American business and management science, who have been accustomed to thinking that they are leading the business of the world, in every sense, but also for their Japanese counterparts who have been following American business and theory. The introduction of Japanese style management is one thing but its practical application is quite another matter; as an old Japanese proverb says, “You carve the statue of Buddha but do not put the spirit in it” (Hotoke tsukutte Tamashii irezu). Without understanding the minds of Japanese businessmen working in Japanese businesses it is of no use, and may even be dangerous, to argue about the transferability and workability of the Japanese type of management in the US.

Details

Management Decision, vol. 23 no. 4
Type: Research Article
ISSN: 0025-1747

Article
Publication date: 1 May 2002

Linda A. Krefting

Perceived compatibility between requirements of managerial work and attributes of women is believed important to the advancement and success of women, and research…

1832

Abstract

Perceived compatibility between requirements of managerial work and attributes of women is believed important to the advancement and success of women, and research demonstrates continued ambivalence about women executives. The question of how images of women executives are disseminated, reproducing or contesting negative characterizations, has received little attention. The research reported here focuses on US business press as a cultural carrier disseminating images of women executives. Critical discourse analysis examined 27 front page Wall Street Journal accounts of 22 women executives in the year following Carly Fiorina’s appointment to head Hewlett‐Packard; 20 front page accounts of 24 men executives were used as comparison. Prominently featured articles on women executives provide fractured images of women as executives: while some accounts are positive, other portrayals reinforce negative perceptions of women’s competence and likeability as executives and concerns about the social order. Similar issues are not raised in coverage of male executives. Author gender does not seem to affect the portrayal.

Details

Women in Management Review, vol. 17 no. 3/4
Type: Research Article
ISSN: 0964-9425

Keywords

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