Hand-eye coordination refers to the harmonization between visual information and hand movements. In this coordination, the information perceived by the eyes is used to guide the movements of the hands. In many games, hand-eye coordination is important for the player's experience. However, when players are faced with an unfamiliar activity, it can be a challenge to develop hand-eye coordination in a short period. This study proposes a method for hand-eye coordination training in gaming using Electrical Muscle Stimulation (EMS). By employing EMS, it is possible to enhance attention distribution during bilateral hand movements and improve hand-eye coordination, potentially enabling individuals to train hand coordination skills in a shorter period. To test the feasibility and effectiveness of our method, we first tested participants for attentional switching while wearing the EMS device to ensure that it did not negatively affect participants. Sixteen participants were then trained in hand-eye coordination with and without EMS, and the effects of the training were tested in a customized game and a real music game. The results showed that participants trained with EMS showed more significant improvements in scores and accuracy than those without EMS in both the custom game and the real game. We also conducted a retained effect experiment, which confirmed that participants retained the training effect one week after training. Thus, our study shows the possibility of using EMS as a new medium for training hand-eye coordination in games.

In first-person shooter (FPS) games, players often need to calculate the timing of their shots for moving targets in advance based on the speed and relative position of those targets. For most players, the accurate timing of shots requires extended gaming experience and training. Unlike professional players, hobby players have less time to compete and train, do not receive professional game guidance, and cannot afford expensive gaming devices. According to previous studies, wearable devices with electrical stimulation can effectively control the muscles with rapid reactions. Here, we provide a method for training the timing of gaming shooters using electrical muscle stimulation (EMS). We believe that training with EMS is feasible and effective, allowing players to quickly learn and improve their gaming experience. To test the feasibility and effectiveness of our approach, we first tested the player's reaction time when using the EMS device to ensure that it did not have a negative impact on the player. Participants were then trained in a custom FPS game with three methods: EMS, non-EMS and EMS-only. The results showed a more significant increase in the average hit rate of EMS-trained participants compared to those trained using the other two methods. Thus, our study shows the possibility of using EMS devices as a training medium for a custom FPS game.

During the global pandemic of coronavirus disease 2019 (COVID-19), it is crucial to minimize the spread of the infection until effective drugs and vaccines are developed. Therefore, close contact must be reduced to prevent human-to-human transmission. We propose a simplified inexpensive system using a monocular camera combined with Raspberry Pi, a small single-board computer, to measure physical distancing and warn people of their proximity with others.

In this paper, we discuss the development of a low cost sensor unit for the monitoring of nitrogen dioxide (NO2). The developed sensor unit can operate at 267.21 mW and collect NO2 concentration, temperature, and relative humidity. The sensor unit was installed outdoors near a main road, for a 122 h experiment. The data collected from the sensor unit were stable. Further, the selected electrochemical NO2 sensor was effective, confirming that NO2 concentrations were high on weekdays (during heavy traffic) and low at night.

In Japan, more than 1,000 earthquakes occur annually, thus causing enormous damage. However, in areas facing the ocean, the risks of secondary disasters due to tsunamis are extremely high. We conducted research the on an emergency disaster prevention system for transmitting tsunami information using ultra-low- frequency sound sensors and tide-level gauges. The system conveyed the information to members in the crisis management staff for the area concerned, and we assumed that the staff in charge made evacuation recommendations to the citizens of the area based on the information. In addition, when a tsunami occurs, there is a high possibility that an existing infrastructure cannot be used because an earthquake has already occurred. In this research, we develop a disaster prevention system using tsunami information using long-distance wireless communication technology, MAD-SS.

Our research group is currently focused on research and development of Internet of Things-based robust emergency and disaster prevention systems to transmit tsunami information retrieved from infrasound sensors. To constantly test the effective sensor operation, it is necessary generate infrasound. Therefore, we considered the infrasound generated when opening and closing doors in this study, and used one sensor to detect the state variation of multiple doors. We constructed and verified the detection system for various doors.

we developed a system for augmenting photos taken with a smartphone with heart rate information acquired by a smart watch at the time of shooting, and a photo search engine that allows for using heart rate as a search key. Thereby, for example, when the user searches for a photograph, the user can know the interest of the photograph through his own biometric information. The photographing system was implemented by linking the photographing function of the pulse wave meter provided in wearable devices and smartphones. The search system was implemented by using image data with heartbeat information embedded and by providing a mechanism using heartbeat information as a search key.

In this study, we conducted long-distance radio propagation experiments at 1mW/145 MHz to realize low-power long-distance communication for wildlife research and disaster prevention telemetry [1]. We successfully realized long-distance communications from a weather balloon (elevation: ~14,000 m) with 1 mW radio power. Furthermore, we demonstrated that our method can achieve such long-distance communication at 10 BPS/1mW with battery cell operation in the SSB mode and that the SNR in the SSB bandwidth is better than -10 dB.

A life log records man’s activity information as digital data. After these life logs are recorded, they are used in order to look back upon an individual’s life. There are some problems in the method of life log acquisition. The system needs to install many sensors in a house. In order to install sensors, much initial investment is needed and the user’s burden is heavy. Moreover, since the mental resistance is also strong to installing sensors in a house, introduction of the system takes time and effort. For the solution of these problems, we propose a method of acquiring and analyzing life log from Android based home electric appliances. In this study to develop an experimental system, the life log information which could be taken with Android home electric appliances is acquired by the simulated environment with home electric appliances with minimal sensors, and the life log is used and very rough life pattern is estimated. The reliability of the acquired log information is evaluated by getting subjects to live for one week in this system.

We conducted long distance radio propagation experiments at 1-10mW/145MHz, to realize a low-power long-distance communication for wildlife research and disaster prevention telemetry. In this paper, we describe that we succeeded in long distance communications, from a ferryboat to the top of Mt. Asugiyama (elevation: 501m, distance: 15km) in Kure, Hiroshima, Japan, in the verification test of our method using 3W radio power. We found out that our method has sufficient capability to achieve such a long distance communication at 10BPS/10mW in battery cell operation on a marine, if we use SSB mode and the SNR in SSB bandwidth is better than -10dB.

In this paper, we describe the construction of a long distance communication sensor network node for Arduino. We develop a Mad-SS Shield prototype system, which succeeds in about 5-km transmission with a 1 mW output.

In recent years, the research of sensor networks has advanced. They are anticipated for use in a wide variety of fields such as traceability systems of products, environmental morning, health care, etc. However, developers must develop applications to work in a sensor node and applications to make the sensor data visible. Therefore the knowledge that is necessary for development and the acquisition of the language will take time to develop. As described in this paper, we propose a development environment for sensor network application development. The environgment will be useful even by web programmers and a designers.

Recently, steganography using multiple media contents has been proposed as an information security technology. In this paper, model and algorithm of real-time steganography scheme is proposed. This system is implemented as embedding a piece of secret audio data stream which is recorded as synchronous as it is embedded into another piece of audio cover data stream. In addition, embedding positions in cover data with sampling size of 16-bit can be arbitrarily-designated. SNR analysis function is presented to analyze the embedding robustness and capacity of first signal ldquo1rdquo in every sampling point of cover data. We derive a conclusion through empirical test that the stego data can avoid drawing suspicion even when we embed two bits of secret data into the 7thand 8thbit of cover data from LSB in each sampling point.

We report the system that collects the data from the sensor network and visualizes the data on real time by three dimensions on a computer. It becomes possible for this system to make a user make the measurement data on space intuitive.

Using a cluster of PCs or workstations or the like (called nodes) to implement the database server can bring us two great benefits: high scalability and parallel processing capability. Before such a database server can be put into actual use, however two problems have to be solved. The one is how we cope with the data-skew since it can degrade the system performance significantly. The other is how a node is connected to or disconnected from a database server without affecting the users. One general solution to both problems is to redistribute the data. Unfortunately, this would take the data offline for a long time. In fact, numerous applications such as that for reservations, finance, process control, hospitals, police, and armed forces cannot afford the offline data for any significant amount of time. We address the subject of balancing data load online, i.e., balancing data load concurrently with users' reading and writing of the database. The main contributions are an effective approach for this purpose and a comprehensive performance study of the possible alternatives.

This paper reports on our trial of the development of a message board system on the World-Wide Web (WWW), which supports communications between a receiver and anonymous senders.We call this type of system an "on-door" communication board, and implemented a prototype based on our experience of the operation of such a board on the door of a room in a graduate student hall of residence.