The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Aspect-oriented programming (AOP) is a technique for modularizing crosscutting concerns (CCCs). A variety of CCCs can be found in typical Web applications. Most CCCs are scattered over Web-specific events such as page requests. AOWP, a PHP-based AOP framework, provides Web-specific aspect instantiations for dealing with session management and pointcut & advice mechanisms for capturing Web-specific...
In many fields employing robots, e.g., wheelchair robots, rescue robots, and construction robots, those which can move on rough terrain are desired. A robot with a simple mechanism and high mobility for all-terrain is discussed in this paper. A novel type of four-wheel-type mobile robot is developed, and its design is discussed from a functional viewpoint. In addition, strategies for moving on rough...
The authors have demonstrated the moving picture of visible femtosecond laser pulse propagation in diffusive medium by using light-in-flight holography. This technique open the possibility for observing various ultrafast phenomenon in diffusive materials such as biological tissue or cells.
Collision detection is one of most important techniques in machine control. In RoboCup (robot project) 4-legged league, a collision causes an incorrect localization. Recently collision detection methods using joint data and methods using acceleration sensors were proposed. But they needed a lot of memories or often caused false recognition. We propose three methods to detect collision using frequency...
We propose a hierarchical display method for small devices based on saliency. This method displays a large scale image in a small screen of a small mobile device as a mobile phone. In this method a region of interest (ROI) is detected using a saliency model. The region is successively detected hierarchically to produce a tree structure of ROI. Then we calculate the increasing rate of saliency in each...
In open systems, certain unfavorable situations due to unanticipated user behavior may be seen, which results in a violation of cross-cutting policy. This paper proposes a runtime monitoring method to check such problems. Since there is a large gap, a certain link is needed between the policy and runtime execution method. We employ a two-step checking approach; an offline symptom checking and a runtime...
Mixed Reality (MR) technologies have recently been explored in many areas of Human-Machine Interface (HMI) such as medicine, manufacturing, entertainment and education. However MR sickness, a kind of motion sickness is caused by sensory conflicts between the real world and a virtual world. The purpose of this paper is to find a method to reduce MR sickness based on MR technology with a Head-Up Display...
Rehabilitation systems and assistive technology devices for people with motor disabilities caused by stroke or the aging process require a human-friendly actuator that is soft, compact, slow, noiseless, and environmentally benign. In order to realize these kinds of actuators, we designed a soft metal hydride (MH) actuator using a copper-coated LaNi5 alloy and a laminate film bellows. For the purpose...
A metal hydride (MH) actuator that uses the reversible reaction between the heat energy and mechanical energy of a hydrogen absorbing alloy is characterized by its small size, low weight, noiseless operation and mechanical compliance. Though the moving speed of the MH actuator is slow, this actuator is a suitable as a power source for rehabilitation or assistive devices. Prototype assistive devices...
In many fields employing robots, e.g., wheelchair robots, rescue robots, and construction robots, robots that can move on rough terrains are desired. A robot with a simple mechanism and high mobility for all terrains is discussed in this paper. A four-wheel-type mobile robot is developed, and its design is discussed from a functional viewpoint. Its fundamental capability of moving on rough terrains...
We have successfully fabricated a polarization converter by reversing the polarity of the electrode in coherence length along a X-cut Z-propagating Ti:LiNbO3 waveguide. 100% conversion ratio was achieved with an applied voltage of 17 V.
We propose a new domain-specific aspect-oriented programming (AOP) mechanism for Web application development. A variety of crosscutting concerns such as access control and performance tuning are found in typical Web applications, but it is not easy to concisely modularize the concerns as aspects in current AOP languages because they do not provide pointcut mechanisms for directly handling events in...
We propose a model of hierarchical attention focusing and its application to a display method for small mobile devices. First we point out that the visual resolution is low when the attended area is broad and is high when the attended area is narrow. Then we propose a model to obtain saliency which expresses tendency of attracting human attention. Combining these we construct a model which controls...
The purpose of our study is a measurement of 3D (three dimensional) distance between an artificial cement-type cup and a artificial femoral head in a living patient's body after THR(total hip replacement) from an AP(anterior-posterior) Roentgen image and a lateral image, when the angle between the two images is unknown. Recently we proposed a measurement method for non-cement-type cup. We modified...
We propose a numerical diagnosis method of a human walk using DCT (discrete cosine transform) of a wearable accelerometer data. We found an apparent difference between smooth walks and non-smooth walks. Our work can contribute to the improvement of people health with a walk diagnosis made by a portable machine.
A waveguide optical coupler for high Q LiNbO3 disk resonator has been implemented for the first time, which has led fiber optic light successfully to whispering gallery modes of a resonator.
This paper describes a method that estimates the degree of attractiveness of each part of input images taken by plural cameras. The attractiveness is expected to indicate the high possibility of existing of objects. We assume that the objects are included in only a few images among plural images. The degree of attractiveness of each part of the particular input images including objects is obtained...
The purpose of our work is measurement of 3D distance between a cup as an artificial acetabular and a head as an artificial femoral head in a patient body from AP and lateral Roentgen images without known angle between AP (anteriorposterior) and lateral after THR (total hip replacement). Martell measured the 2D distance between a cup and a head of an artificial hip joint. And also RSA (Roentgen stereophotogrammetric...
We propose a new Web page scoring method based on the link analysis among sets of Web pages. Conventional link analyses such as PageRank and HITS calculate importance degree of each Web page; however, the authors of Web pages often create multiple pages to describe a specific topic. The importance degrees of such multiple Web pages cannot be derived by the conventional link analyses accurately. To...
Mixed reality (MR) technologies have recently been explored in many areas of human-machine interface (HMI) such as medicine, manufacturing, entertainment and education. However MR sickness, a kind of motion sickness is caused by sensory conflicts between the real world and virtual world. The purpose of this paper is to find out a new evaluation method of motion and MR sickness. This paper investigates...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.