Satoshi Kanai - Academia.edu (original) (raw)

Papers by Satoshi Kanai

This paper proposes a mixed reality based digital prototyping environment aiming for user interfa... more This paper proposes a mixed reality based digital prototyping environment aiming for user interface (UI) design of handheld information appliances with markerless tracking. The edge-based robust tracking of the 3D housing model was realized. The tracker was integrated with our XAML-based 3D digital prototyping tool of UI design. The accuracies of the tracking were examined, and the user performance measures using the mixed reality based prototyping were evaluated. The results showed higher reality and better correlation with the real product of the proposed prototype over conventional digital prototypes. Keywords— digital prototyping, usability, user interface, mixed reality, ergonomics, tracking

Usability-conscious design while shortening the lead time has been strongly required in the manuf... more Usability-conscious design while shortening the lead time has been strongly required in the manufactures of information appliances in order to enhance their market competitiveness. Prototyping and user-test of their user interfaces at early development stage are the most effective method to fulfill the requirements. However, fabricating the physical prototype costs much, and they become available only in late stage of the design. To solve the problem, advanced tools for UI prototyping were proposed and developed where a UI-operable 3D digital prototype can be fabricated in a less-expensive way based on user interface description languages (UIDLs), and where the user test and usability evaluation can be performed in more systematic and efficient way than in the physical prototype. In the tools, two conventional UIDLs were adopted; UsiXML and XAML. And their specifications were expanded to support not only declarative description of static structures and dynamic behaviors of the UI, b...

Recently, ICT technology has been used to maintain civil engineering structures, such as bridges ... more Recently, ICT technology has been used to maintain civil engineering structures, such as bridges and dams, in order to increase the efficiency of the maintenance process. To support the inspection processes, the data model that has the information of design (Computer-Aided Design, CAD data) and inspection (measured data) is very important. Moreover, the data should be archived for a long time (more than 50 years) because of the long lifecycle of bridges. Bridge life cycle management aims to perform the management functionalities related to bridges from the conceptual stage to the end of their useful life, through the design, construction, operation, and maintenance stages. Degradation data obtained by bridge inspections have to be retained stably for a long time. Hammad et al. discussed the requirements for developing a mobile model-based bridge life cycle management system. A prototype system based on the Building Information Model (BIM) standards, the Industry Foundation Class (IF...

Journal of Orthopaedic Research, 2018

ABSTRACTAdolescent idiopathic scoliosis (AIS), the most common pediatric musculoskeletal disorder... more ABSTRACTAdolescent idiopathic scoliosis (AIS), the most common pediatric musculoskeletal disorder, causes a three‐dimensional deformity of the spine. Although rod curvature could play an important role in anatomical spinal reconstruction in patients with thoracic AIS, intraoperative contouring of the straight rod induces notches into the rod, leading to decreased fatigue strength. Here, we analyzed pre‐bent rod geometries from 46 intraoperative tracings of the rod geometry, which can provide anatomical spinal reconstruction in patients with thoracic AIS. The center point clouds of the rod shapes were extracted and approximated as arcs and straight lines. The difference between the center point clouds were evaluated using the iterative closest point methods. When the rod shapes were divided into six groups based on length followed by hierarchical cluster analysis, 10 representative rod shapes were obtained with a difference value of 5 mm. Thus, we identified optimized rod shapes to g...

Journal of the Japan Society for Precision Engineering, 2019

International Journal of Automation Technology, 2019

This is the takeaway of the seminal book on the future of work by Davenport and Kirby. 1 The emer... more This is the takeaway of the seminal book on the future of work by Davenport and Kirby. 1 The emergence of cyber-physical systems makes radical new products and systems possible and challenges the role of humankind. Throughout the design, manufacturing, use, maintenance, and end-of-life stages, digital aspects (sensing, inferencing, connecting) influence the physical (digital fabrication, robotics) and vice versa. A key takeaway is that such innovations can augment human capabilities to extend our mental and physical skills with computational and robotic support-a notion called "augmented well-being." Furthermore, agile development methods, complemented by mixed-reality systems and 3Dprinting systems, enable us to create and adapt such systems on the fly, with almost instant turnaround times. Following this line of thought, our special issue is entitled "Augmented Prototyping and Fabrication for Advanced Product Design and Manufacturing." Heavily inspired by the framework of Prof. Jun Rekimoto's Augmented Human framework, 2 we can discern two orthogonal axes: cognitive versus physical and reflective versus active. As depicted in Fig. 1, this creates four different quadrants with important scientific domains that need to be juxtaposed. The contributions in this special issue are valuable steps towards this concept and are briefly discussed below.

Journal of the Japan Society for Precision Engineering, 2019

International Journal on Interactive Design and Manufacturing (IJIDeM), 2007

Journal of the Japan Society for Precision Engineering, 1996

Journal of the Japan Society for Precision Engineering, 1993

CAD'17, 2017

The current paper presents a system for the dynamic simulation of the human hand. The simulation ... more The current paper presents a system for the dynamic simulation of the human hand. The simulation of the human hand offers the capability to acquire handshapes that correspond to letters of the finger alphabet, enabling an integrated representation of words and sentences. The hand model is designed using the Autodesk Inventor TM and Autodesk AutoCad TM design environments. The user is able to type words or sentences which are dynamically translated into postures according to the finger alphabet. The system is based on the physiometric characteristics of an average human hand. High precision design is utilized in every part through integration of all the necessary functionalities needed to perform the movements required. The system has been tested on more than 500 words with a letter representation success rate in the range of 95-97%.

Journal of the Japan Society for Precision Engineering, 2003

Journal of the Japan Society for Precision Engineering, 1999

Journal of the Japan Society for Precision Engineering, 1993

International Journal of Automation Technology, 2014

With the fast growth of the market forMEMS (Micro-Electro-Mechanical Systems) devices, Computer-A... more With the fast growth of the market forMEMS (Micro-Electro-Mechanical Systems) devices, Computer-Aided Design (CAD) and Computer-Aided Process Planning (CAPP) systems for MEMS are essential for the appropriate division of labor between MEMS design and fabrication. Although several CAD systems for MEMS devices are commercially available, CAPP systems for MEMS are still underdeveloped, and few systems have been investigated. The purpose of this study is to prototype a CAPP system for MEMS for non-expert MEMS designers. MEMS device geometry, a complex layered structure made of multiple materials, is represented as a solid model called a device model. The system has twomain functions. In processextraction function, all feasible fabrication processes of the device are exhaustively derived from the device model using 3D fabrication features as clues. In manufacturable-geometry-estimation function, the expected 3D geometry of the device that will actually be fabricated by the derived proces...