Papers by Hiromi Fujimori
International Symposium on Affective Science and Engineering, 2019
We will have a look into an existing babysitting cooperative and discuss the effectiveness of nud... more We will have a look into an existing babysitting cooperative and discuss the effectiveness of nudge theory in behavioural economics. In the coop , parents are exchanging coupons as a currency and babysitting their own children with each other. However, at some point, the coop faced with severe supply-demand imbalance of coupons and went into "depression". We will offer a solution to adjust the imbalance by using mobile application with applying six major techniques of the nudge theory to its design.
International Symposium on Affective Science and Engineering, 2019
The purpose of our study was to determine the electrooculography (EOG) interface that can be used... more The purpose of our study was to determine the electrooculography (EOG) interface that can be used for amyotrophic lateral sclerosis (ALS) patients that can use without preparation. We proposed eye movement detection using Root Mean Square the active threshold (AT method) and k-nearest neighbor (k-NN) methods. The AT method is the threshold method that is dynamically calculated using the root mean square. This report describes the combined use of both methods. We conducted experiments on the waveform detection accuracy for 19 healthy subjects between the ages of 20 and 29 years. The hit rate for the proposed method was 94%, and the FA rate was 9%. Next, we calculated the information transfer rate (ITR), a popular evaluation index in for the brain-computer interface. (BCI). The minimum ITR using the proposed method was 19.02[bits/min]. The ITR of the P300 speller a BCI tool, was 16.4[bits/min]. The ITR of the proposed method was higher than that using the P300 speller. Therefore, it can be said that the proposed method has usefulness as an interface.
International Symposium on Affective Science and Engineering, 2018
Switch using bio-signal are researching for communication of a physically disabled person such as... more Switch using bio-signal are researching for communication of a physically disabled person such as ALS. We have researched bio-signal device for daily life support of ALS patients using ocular potential. We suggested Doubled Constant to RMS (DCR) method that is dynamic calculate the threshold value using RMS to detect to intentional action. However, DCR method has problem that the threshold increase from signal fluctuation, and cannot be detected large electrooculography change by intentional action. We need research better method for detection to intentional action. In recent years, it has been found that classification by pattern recognition in intentional action gives high accuracy for EMG. We compared the DCR method and the k neighborhood method which is one of the pattern recognition. It is because, Bio-signal switch has need better detection method. In result, each method has different detect conditions. In future, DCR method and knn method are combined for improved accuracy, and consider online analysis on EOG.
International Journal of Affective Engineering, 2017
The Brain-Computer Interface (BCI) is a system for measuring brain nerve activity to operate devi... more The Brain-Computer Interface (BCI) is a system for measuring brain nerve activity to operate devices. We have focused on motor imagery BCI through event related desynchronization (ERD) using μ rhythms. In order to increase the switch detection accuracy of motor imagery BCI through ERD using μ rhythms, we have proposed a method of analysis with the aim of investigating the appropriate analysis section width and number of attempts for ERD detection. Further, for the number of attempts, 30 times was considered the most appropriate. In order to research the appropriateness of the analysis section width and number of attempts for these, the same test was performed on 5 other test subjects and desynchronization was seen in the motor imagery of all of the test subjects. From here, the parameters for asynchronous BCI was obtained. In future, this should be verified on a test that actually uses asynchronous BCI.
International Journal of Affective Engineering, 2016
This study develop the Tversky and Kahneman (1973) and Slovic et al (1991), (2004) to assesses th... more This study develop the Tversky and Kahneman (1973) and Slovic et al (1991), (2004) to assesses the usefulness of heuristics, its objectives, and contingent negative variation (CNV) as they relate to consumer's decision-making in the selection of an item. CNV is one of the event-related components of the brain, which is frequently used in the study of attention and learning, among others. In this study, on CNV measurement, an experiment was arranged where a subject was given the task of selecting a card and finding the pattern in return received a reward. To win lot of rewards, it was necessary for the subject to discover the patterns on the cards and then to quickly turn over the card. It was necessary to solve the problem with the use of heuristics as this was repeated numerous times. This is the first study on the consumer decision-making process under risk, CNV measurements that are selected through the use of heuristics in neuroeconomics.
International Journal of Affective Engineering, 2019
We developed a system that can objectively evaluate fatigue of long Visual Display Terminals, usi... more We developed a system that can objectively evaluate fatigue of long Visual Display Terminals, using both electrocardiogram data and self-reporting questionnaires. The objective was to identify the elements that contribute to stress within the organization. R-to-R interval (RRI) analysis of the electrocardiogram data allows the establishment of objective stress indices, and the rationalization of diagnosis. We therefore propose the introduction of biometric measurement to stress checking systems.
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Papers by Hiromi Fujimori