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In a brain-computer interface, using event-related desynchronization and synchronization(ERD and ERS), intuitive command input is available. Switching precision was thought to be improved by a detailed examination of the ERD ���� rhythm in the time-frequency domain. In the experiment, measured electroencephalograms of motor cortex in the resting state, hand grasp motion, and hand grasp recall were...
In this paper, we propose a technique to predict fault-prone software functionality, instead of fault-prone module. The granularity of prediction is not a line number nor a function name in a source code, but a software functionality from point of view of testers who are dedicated to software testing. Our approach makes it possible for testers to find faults efficiently and effectively on test case...
The device discovery in Bluetooth is needed before establishing data communications. Almost all Bluetooth slaves are battery-powered so that they should connect with a master through the device discovery for a short time. To prevent the worst case scenario with long device discovery in Bluetooth, the events with long device discovery should be estimated in advance. However, it is intractable to estimate...
Recently, buttery-powered portable devices, which can use wireless LAN (WLAN), such as smart phones and tablet computers, are increasing. However, these devices consume more energy when using WLAN interfaces, and the battery lifetime is shorten. In order to reduce the power consumption of wireless stations, IEEE 802.11 specifies PSM (Power Saving Mode). However, PSM cannot save the energy optimally...
A content delivery network (CDN) using community information that is extracted from the data of a social networking service (SNS) is proposed in this paper. The structure of the load characteristics of the CDN in terms of the number of servers, communities, and downloads is also shown as a tool for evaluating network performance.
Results of a subjective assessment of superresolution (SR) technology for 4K TV sets are reported. 4K TV sets are currently available in the market, and some are equipped with SR functionality. Recently, SR technology that uses nonlinear signal processing (NLSP) and can work in real time has been proposed. The proposed method can enhance images without enlargement. The subjective assessment was performed...
To deal with exponential traffic growth, Elastic Optical Networks (EONs) are necessary because they enable to provide large capacity transmissions. In EONs, multiple widths of spectra are assigned to optical paths. Therefore, fragmentation in frequency domain degrades network performance. We propose a spectrum allocation method to reduce blocking probability and node costs, especially in spatially...
A brain-computer interface (BCI) character input experiment focusing on participants’ BCI intelligibility was performed. In theory, a BCI can be operated by anyone if cognitive activity is possible. However, individual differences clearly occur in practice. Therefore, we supposed that this difference was related to BCI intelligibility. In a previous study, BCI experts and BCI novice users were compared...
We propose VM placement control methods to select VM addition server, and to select movement server of VM. We consider to keep redundancy for server trouble. We confirm that proposed methods can control VM in accordance with the state of each server without increasing servers more than required even if VM added at random. We implement a new scheduling method by the proposed methods in OpenStack and...
The dynamics of network services' growth and decline is similar to infectious disease. So, it is expected that we can explain the growth and decline of a network service by using epidemiological models. The irSIR model is proposed as one of promising model for describing epidemiological transition of network services. To study the validity of applying the irSIR model, this paper focuses on SNSs transition...
Various studies have been conducted regarding vehicles and obstacle avoidance, but very few studies deal with the avoidance of obstacles that suddenly and unexpectedly appear during vehicle operation. We conduct automatic stopping control of the vehicle using a fuzzy control system when the vehicle stop suddenly. The propose system conducts stopping control of the vehicle depending on the distance...
Pedestrian position tracking is essential in implementing many of the new location based services in cellular networks. The ability for positioning in non-line of sight (NLOS) environments has made cellular network based positioning highly popular. However, the position estimation fine-tuning step in the current cellular network based positioning algorithm is not utilizing the available information...
Network-supported remote vehicle control is expected to improve efficiency in the future society. Our research target is to develop a cost-effective real-time control technique using the broadband wireless network infrastructure. To improve the transmission performance using broadband wireless access networks, we have already proposed dual transmission protocol (DTP) that uses independent two transmission...
Concurrency increases on virtualization environments because processes that access various shared resources concurrently run on various cores of various virtual machines. Therefore, the exclusive locks and waits for locks against shared data often occur, and we face challenges that make efficient use of hardware resources difficult. In this paper, we propose and evaluate three methods to addressing...
Super Resolution (SR) is an interesting topic in video and image research. Super resolution image reconstruction (SRR) is one of the commonest SR technologies and has been proposed in many forms. SRR reconstructs a highresolution image from multiple low-resolution images. However, the low-resolution images require an aliasing process prior to reconstruction. The present paper analyzes SRR in the frequency...
This paper proposes a method to update the similarity of items in a privacy preserving collaborative filtering. The similarity of items is a value that shows how similar given two items are. Privacy preserving collaborative filtering is a technique that helps to infer an evaluation value of desired items given the other users’ evaluation values with concealing personal information for each user’s...
In mobile ad-hoc networks (MANET), the suppression of energy consumption is very important, because the networks may be used in situations with disaster or lacking of infrastructures. In our study, we propose a sleep control method exploiting a routing protocol using mobile agent, where nodes not included in a derived route go to sleep. In the proposed method, a node sends a sleep control packet before...
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