Development of a Lumbago Judging Camera Utilizing the Mobility of the Tablet PC
著者
田中 優介 (摂南大学大学院工学研究科)， 福井 裕，川野 常夫 (摂南大学理工学部)
Abstract
The purpose of this study is to develop a new mobile tool with camera allowing to judge whether the workers suffer from low back pain using a tablet PC; iPad. The tool is named “Lumbago judging camera”. The working postures observed in the materials handling or care working become a focus of study. Using iPad a software application is developed to take a picture of the worker’s posture and draw a 2D body link model by touching articulation nodes of the body image on the touch screen. The software finally estimates compression forces in the lumbar intervertebral disk L4/L5 solving equations derived from a static kinematical model. Some workers feel low back pain if the compression force exceeds 3400N (NIOSH criteria). Almost workers feel it if the force exceeds 6400N. Lumbago judging camera developed in this study judges the low back pain using the criteria. The lumbago judging camera is available for use on-site and improvement of the working conditions.
キーワード
タブレットPC, モバイル，荷役作業，介護作業, 腰痛
Keywords
tablet PC, mobile, materials handling, care work, low back pain
The purpose of this paper is to propose system requirements for developing a supporting system for handing-over at nursing-care service facilities, which could include collections and shares of residents’ information of their conditions and their requests oriented by employees’ situation awareness. We conducted three investigations about handing-over among employees at a nursing-care service facility to understand the actual situations and to analyze the contents of handing-over. As the results of the investigations, we revealed that about 75% of contents included information about residents and their families. Based on the investigations, we found that the new supporting system for handing-over should require portability, search function, security and analysis functions.
キーワード
介護サービス，申し送り，気付き，情報共有，携帯端末
Keywords
nursing-care service, handing-over, awareness, information sharing, mobile devise
A method for Selecting Unreachable Objects on One-Hand Operated Mobile Device with Drawing them Close to user’s thumb
著者
村田 和義, 永田 和信, 渋谷 雄 (京都工芸繊維大学)
Abstract
This paper focuses on the one-hand operated mobile devices with touch panel display. Some users use such device with their both hands, i.e., their one hand is used to hold the device and another hand’s finger is used to operate the device. However, in our daily life, it is often happens that we can use only one hand for operation. For example, if a user stands in the train, he/she uses his/her one hand to hang on to the strap. As another example, if a user has a bag with his/her one hand, he/she can use another hand only to operate the mobile device. When the user must use the mobile device with his/her one hand, it might be difficult or hard to touch the everywhere on the display. This paper proposed a new method to touch the everywhere on the display with one hand. With the method, user can pull the objects in far area to near area on the display with simple gesture and he/she can touch the desired object easily. From the experimental evaluation, it is found that the proposed method is effective to touch the objects in far area on the display. On the other hand, it is not so efficient because of the increase the number of operation to touch the desired object. However, from the subjective evaluation, it is found that the proposed method gives a good impression to the user..
Changes on Users Needs for Hardware and Software in the Transition Period to Smartphone ? Analysis of the Survey on Feature Phone, iPhone and Android users
著者
金城 敬太, 東邦 仁虎, 工藤 秀雄 (東京理科大学 経営学部)
Abstract
In this research, we conducted an investigation which shows clearly what kind of preferences the users of three categories have.The categories are (1) feature phone users, (2) iPhone users, and (3) android users. The reason for the investigation is that it is not clear what kind of terminal functions and mobile contents smartphone users use up to the present time. Through this investigation, we clarified the following things: (1) Android users have a tendency to ask for advanced terminal functions. These terminal functions are the same as the functions used in the feature phone. Moreover, Android users have a tendency to use free applications. (2) iPhone users have a tendency to ask for high quality charged contents. These are the results of the above investigation.
キーワード
スマートフォンへの移行，事実発見型ユーザー調査，プラットフォーム間ユーザー特性
Keywords
a shift to smart phones, fact-finding investigation into mobile phone users, characteristics of each platform user
We have proposed Societal Attractor Theory. “Societal attractor” is a spatio-temporal device organized by selected human behavior due to individual motivations, external expressions, and physical constraints. “Service” is spatio-temporally organized human behavior attracted by motivation, expressions of donor and recipient, and environmental constraints. We analyzed customer behavior in Kinosaki Hot Spring where hot springs, hotels, events and shops are attracting visitors. Those attractors change attracting power and have limitations such as capacity or business hours. Then a qualitative simulation method is proposed which focuses on transition probability among attractors. We show the possibility to estimate effect of service flow control by some simulations.
キーワード
サービス, モデル化, アトラクター, シミュレーション，介入予測
Keywords
Service, Model, Attractor, Simulation and Service Control
Fatigue detection system with personal mobile device was developed with an index of flicker fusion threshold (FFT). FFT, defined as a frequency at which intermittent light stimuli appear to be steady for the human observer, is known to be getting lower as the mental fatigue accumulates. The FFT has been used as a measure of arousal level by monitoring the time resolution of early visual systems. A traditional system of FFT detection, originally reported by Simonson and Enzer in 1941, requires a large and expensive device to measure, which impeded the diffusion of the method to be used for fatigue measurement in general public. Here, we report our recent development on the FFT detection method to implement mental fatigue measurement system as downloadable application software for mobile device , namely, (i) a new method to control a subjective flickering sensation by changing the contrast of the visual stimuli instead of changing temporal frequency to realize FFT detection on raster-scan display devices, and (ii) a new paradigm, in which forced-choice task performance was used for FFT detection to eliminate arbitrariness of the subjects’ response and to achieve faster completion of the test.
キーワード
点滅刺激融合閾値, 精神的疲労, モバイル端末, 固定リフレッシュレートディスプレイ, 恣意性
Keywords
Flicker Fusion Threshold, Mental Fatigue, Mobile Device, Raster-Scan Display, Arbitrariness
In our research, we have developed the “I/O Classroom Analysis Application” for tablet devices. With this I/O analysis, the interactions between students and teachers can be visualized. The observable targets were of three types: a teacher, a small group of students and a large group of students. We then recorded the states (information output or input / hearing / thinking) as 3bit binary data. To evaluate how useful this method was using our application, we adapted it into actual classroom settings that used two different teachers. They taught the same content in each class. Subsequently, the results from the overall inquiry were not much different between using our method and the impressions from observing the class. In addition, with the I/O analysis, it was possible to quantitatively grasp 4 types of graphs, the degree of exchange between the teacher and the students, and what type of changes occurred over time.
キーワード
授業， 双方向性， 分析， タブレットPC， 授業改善
Keywords
class, interactive, analyses, tablet PC and improve lecture
We carried out experiments to evaluate the visibility of reading tablet devices and e-paper under staged illuminance conditions. We compared iPad, Kindle DX and paper. In the experiments, we measured subjective evaluation of visibility, the pupil diameter of the subjects and viewing distance. The result found the evaluation of iPad was better than Kindle and paper under low illuminance and the evaluation of Kindle and paper were better than iPad under high illuminance. The result indicated the comfortable illuminance conditions to read for each device.
キーワード
電子書籍, 視認性, 照度, 瞳孔径, 視距離
Keywords
e-book, visibility, illuminance, pupil diameter and viewing distance
