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We propose a mind map manipulation system, named MMVR. This system allows multiple users to edit a mind map by using hand gestures and to share it in virtual reality space. To implement the system, we leveraged a hand gesture tracker for quick, easy, and correct handling of mind map elements and a head-mounted display (HMD) for providing a wider workspace than a standard PC's screen. We conducted...
In a POMDP environment, an agent may observe the same information at more than one state. HQ-learning and episode-based profit sharing (EPS) are well-known methods for solving this problem. HQ-learning divides a POMDP environment into subtasks. EPS distributes the same reward to state-action pairs in the episode when an agent achieves a goal. However, these methods have disadvantages related to the...
This paper proposed robust color constancy method for changing illuminant by using local chromaticity distribution and analysis of illuminant influence for each hue angle. First, changing in chromaticity distribution direction for each color with respect to various illuminant is analyzed using principal component analysis. Next, change in standard deviation of chromaticity distribution with respect...
This paper describes a method of avoiding the dangers of texting while walking. The proposed method is a device which is attached to the buckle of the belt of the person. Using a supersonic wave, we sensed the dangers of the texting while walking and realized a method which notified a person of it beforehand. The device is low cost to build and it can be used anywhere.
The aim of this research is developing a system that estimates the direction of users by attaching multiple antennas to users. We proposed the method of direction estimation using RSSI of multiple XBees antennas attached to the helmet as a wearable device. In this study, we used a bucket filled with water to simulate the human head and confirmed that direction estimation is sufficiently possible....
Vection is an illusion sensation of self-motion provoked by watching visual oscillation. Traditionally, vection perception has been qualified using frequency responses. Indeed, the concept of frequency response is a common way to quantify the responses of visual oculomotor functions such as optokinetic nystagmus (OKN) and vestibular ocular reflex (VOR). This study explores whether frequency is the...
One application of brain-computer interface (BCI) is for entertainment. BCI games have potential extensibility in combination with virtual reality environment. In our previous study, we have proposed a BCI game system composed of a simple EEG recorder, which detects beta/alpha ratio, a smart tablet, a PC, and an immersive head mounted display. In this study, we further proposed a hands-on game by...
Physical unclonable functions (PUFs) have become commercially available for anti-counterfeiting and authentication applications. PUF circuits are built on ASICs but can be implemented on FPGAs. For many electronic products, FPGAs are used in order to shorten development periods and reduce costs. Therefore, implementing PUFs on FPGAs can improve security in nearly all electronic products. However,...
The information terminal bus stop has been studied widely. It is reported that the information terminal bus stop for citizen support is effective for the purpose of improving citizens' convenience. In particular, the bus location system is considered important for the purpose of eliminating users' concern about what time will it arrive?, Will it arrive at all?; thus, there is a great deal of research...
Vibrotactile stimulation to the gluteal or back regions through seats is a promising approach to deliver supplemental information to humans. Designing a method to achieve pleasant vibrotactile stimuli was addressed in this study, as such stimuli tend to result in unpleasant experiences for users. In particular, we investigated the properties of continual vibrotactile stimulation to the gluteal region...
This paper presents a door lock system combine with augmented reality technology (AR) and mobile phone remote control system. The system consists four parts: augmented reality application, wireless network module, microcontroller, and electronic door lock. General access control has a keyhole or numeric keypad. Interested people can easily start from here that can open the door. The system only has...
Our research group at Nagoya Institute of Technology is developing “MMDAgent” as a voice interaction toolkit. Using MMDAgent, system developers can create various speech dialogue contents. When developers create voice interaction contents, it is important to consider user needs. Therefore, an approach is necessary to elicit preference information of the user. In this paper, we propose a method to...
Augmented Reality (AR) has been developed rapidly through recent years due to the increasing mobility and computing power of PC. And there are more and more AR applications have been developed for learning experiences. However, a great number of such AR applications work as merely textbook expansion by overlaying additional information on papers. In this research, we take advantage of the potential...
While the extension of healthy life expectancy has become an important issue, demands of the health care are growing. In the robot industry, the societal implementation of robots for the health care has proceeded in order to respond to these demands. In this paper, considering the present situation, we propose the design policy of the therapeutic robot system which provides care according to the situation...
We have been studying a navigation system for the visually impaired using 3D audio. We proposed to give cues on the direction and distance to the target location using a simple 3D guidance audio. We implemented a prototype 3D audio navigation system, and conducted experiments using this prototype. We investigated the influence that sound pressure level differences of navigation sound gave for a route...
In this paper, we propose a cost-efficient hardware design, coarse and fine rotation (CFR) based FFT twiddle factor generator. It aims to extremely reduce the hardware area, especially for the larger length of FFT-points. Also, our proposed approach is generalized for arbitrary FFT sizes, not limited to the power of 2. In hardware implementation by using TSMC 90-nm CMOS technology, the circuit area...
Peripheral venous catheters (PVCs) are the most frequently used devices in hospitalized patients. Healthcare providers routinely assess the PVC site for signs and symptoms of phlebitis and infiltration; however, the diagnoses remain uncertain. In this study, we examined whether thermography can be used to assess PVC site complications. A low-temperature region, caused by infiltration, was observed...
To advance Java programming studies, we have developed the Java Programming Learning Assistant System (JPLAS). The test code plays a critical role in verifying the correctness of the source code from a student automatically at the server in the code writing problem in JPLAS. Previously, we proposed the test code generation tool that automatically generates the test code from the given source code...
In this paper, we propose block diagonal movement technique to classify shots on video frame sequence. Both RGB color pixel values and Hue value are employed in the proposed technique. Since Key frames are essential to analysis on large amount of video sequence databases this paper uses surveillance video files to extract some meaningful information key frames from long video sequences. This purpose...
In this study, a method for determining the reference points in the time and frequency domains for voice morphing is proposed. Many studies have considered voice morphing out of which many methods require manual determination of the reference points. In this study, we automatically determine the reference points via modified restricted temporal decomposition and a line spectral frequency. The evaluation...
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