Showing papers by "Toramatsu Shintani published in 2015"
30 Aug 2015
TL;DR: The authors' Web system, called GoalShare, which gathers linked open data LOD of hierarchical goals to address social issues, was applied to civic hackathons held in the city of Nagoya in Japan and showed that goal structures input by team members themselves with enough instruction time were relatively detailed but varied widely among teams.
Abstract: Civic hackathon is a participatory event for prototyping of innovative services through collaboration between citizens and engineers towards addressing social issues Although continuous contributions are needed for improving the prototypes and for applying them to social issues, participants frequently stop contributions after the hackathon due to their day job To address this problem, we applied our Web system, called GoalShare, which gathers linked open data LOD of hierarchical goals to address social issues, to civic hackathons held in the city of Nagoya in Japan We compared goal structures between two situations The results showed that goal structures input by team members themselves with enough instruction time were relatively detailed but varied widely among teams, and those input by a single GoalShare user with limited time remained at a simple overview level but had uniform level of detail A more user-friendly interface usable without instruction is required for real-world situations
18 citations
12 Jul 2015
TL;DR: A motion detector based on the attenuation of Bluetooth signals, the 2.4 GHz band, by water is developed and concluded that Bluetooth can be used for a motion detector.
Abstract: Remote elder care is important but it is difficult to keep a track of a patient's medication. We developed a remote elder care support system that enables users to synchronize handwriting, and photos in real-time on ordinal smartphones and tablet devices. However, it remained difficult for caregivers to remotely check the timeliness of the patient's dose. To solve this problem, we developed a motion detector based on the attenuation of Bluetooth signals, the 2.4 GHz band, by water. The advantage of our method is that it does not require the equipment of any devices to detect care receivers is unnecessary. We experimented the attenuation of Bluetooth signals by human body and concluded that Bluetooth can be used for a motion detector.
10 citations
31 Dec 2015
TL;DR: A motion detector based on the attenuation of Bluetooth signals within the 2.4 GHz band, by focusing on water, is developed that solves the key problems because Bluetooth beacons have long life without needing to change their batteries and Bluetooth signals through most obstacles.
Abstract: A human motion detector is needed for the device-fee localization. Infrared light and ultrasonic waves are mainly considered human motion detectors, but they have problems. These devices have a positioning restriction due to their power supplies and the loathsomeness of being monitored. We developed a motion detector that is based on the attenuation of Bluetooth signals within the 2.4 GHz band, by focusing on water. The motion detector solves the key problems because Bluetooth beacons have long life without needing to change their batteries and Bluetooth signals through most obstacles. We applied these motion detectors to a remote elder care support system and experimented with the attenuation of the Bluetooth signals by taking into consideration the human body and concluded that Bluetooth can be used for motion detectors. We also discussed this motion detector in comparison with others.
8 citations
TL;DR: A prototype of a public debate support system that utilized the SOCIA dataset was developed and the similarity between public goals for a goal matching service to facilitate collaboration was formulated.
Abstract: To address public concerns that threat the sustain-ability of local societies, supporting public participation by shar-ing the background context behind these concerns is essentially important. We designed a SOCIA ontology, which was a linked data model, for sharing context behind local concerns with two approaches: (1) structuring Web news articles and microblogs about local concerns on the basis of geographical regions and events that were referred to by content, and (2) structuring public issues and their solutions as public goals. We moreover built a SOCIA dataset, which was a linked open dataset, on the basis of the SOCIA ontology. Web news articles and microblogs related to local concerns were semi-automatically gathered and structured. Public issues and goals were manually extracted from Web content related to revitalization from the Great East Japan Earthquake. Towards more accurate extraction of public concerns, we investigated feature expressions for extracting public concerns from microblogs written in Japanese. To address a technical issue about sample selection bias in our microblog corpus, we formulated a metric in mining feature expressions, i.e., bias-penalized information gain (BPIG). Furthermore, we developed a prototype of a public debate support system that utilized the SOCIA dataset and formulated the similarity between public goals for a goal matching service to facilitate collaboration.
4 citations
12 Jul 2015
TL;DR: This work proposes a system to generate search result snippets that considers sentiment polarity, and proposes a method for extracting reputation sentences from search result snippet based on a given search query.
Abstract: Although sentiment polarity is important for under-standing public reputations, conventional web search snippets do not include sentiment polarity. Therefore, we propose a system to generate search result snippets that considers sentiment polarity. We also propose a method for extracting reputation sentences from search result snippets based on a given search query. To extract such sentences, we use a Paragraph Vector (PV) to calculate the similarity of words and sentences. Overall, our method is based on this PV and logistic regression for analyzing sentiment polarities. We evaluated the accuracy of our method via the Rakuten dataset. In our evaluation, we focused on methods pertaining to what supports sentiment polarity analysis in our method. We found that considering both a search query and reputation is important in generating our modified snippets. Furthermore, we identified the need for a method to remove meaningless sentences, which will be part of our future studies.
3 citations
05 Feb 2015
TL;DR: The paper presents an algorithm to construct the coalition lattice from a CSG problem and the result of the evaluation, which is a novel data structure to represent the robustness of coalitions.
Abstract: Forming effective coalitions is a major problem in multiagent systems. Coalition structure generation (CSG) involves partitioning a set of agents into teams, i.e. coalitions. The set of coalitions is a coalition structure. In the context of the CSG research, our goal is forming the coalition structure that maximizes the social surplus. The social surplus is the sum of utilities obtained by forming coalitions. Calculating the optimal coalition structure is time consuming, therefore recalculating the optimal coalition structure should be avoided when an agent leaves a coalition structure because of sudden reasons such as an accident or an illness. Robust coalition structure generation (RCSG) is CSG focused on the robustness of coalition structures. The robustness of coalition structures is the property that the social surplus is kept at the maximum when any agents leave the coalition structure. We focused on the robustness of each coalition to solve an RCSG problem. Our method finds the optimal coalition structure by considering the robustness of each coalition in the optimal coalition structure. We proposed a coalition lattice, which is a novel data structure to represent the robustness of coalitions. The paper presents an algorithm to construct the coalition lattice from a CSG problem and the result of our evaluation.
2 citations
12 Jul 2015
TL;DR: A system that converts climbing plan documents into a machine-readable format, enabling much reuse and sharing of information, and implemented functionality for sharing climbing plans among many users by displaying such plans on a Web page.
Abstract: In this paper, we developed a climbing plan sharing system. While climbing plan documents created in Microsoft Word or PDF formats contain necessary climbing information, a computer cannot understand such information because the information is written in a natural language. Such climbing plan documents are tedious to write, but are typically required before setting out to climb. Therefore we developed a system that converts climbing plan documents into a machine-readable format, enabling much reuse and sharing of information. We implemented functionality for sharing climbing plans among many users by displaying such plans on a Web page. Our system can therefore help climbers share machine-readable climbing plan documents, progressing the accumulation of climbing information that is difficult to effectively write and share in a natural language.
1 citations
12 Jul 2015
TL;DR: An effective algorithm to convert the problem of finding the coalition structures' robustness into a CSG problem is proposed and a case-study evaluation of the proposed method shows that it constructs the coalition lattice more efficiently.
Abstract: Forming effective coalitions is a major issue in multiagent systems. The existing coalition structure generation (CSG) algorithms fail to determine the structure 's robustness because agent withdrawals cannot be identified in all the coalition structures. The coalition lattice, which was proposed in a previous study, provides an evaluation of the coalition structure's robustness and enables to apply the existing CSG algorithms. However, to construct the coalition lattice, the lower bounds for the coalition utilities must be considered. In the present study, robustness is redefined and an improved conversion algorithm is proposed. In particular, a method to estimate the upper and lower bound of the coalition values is presented. Furthermore, an effective algorithm to convert the problem of finding the coalition structures' robustness into a CSG problem is proposed. A case-study evaluation of the proposed method shows that it constructs the coalition lattice more efficiently.
1 citations
TL;DR: A system that converts a climbing plan document into a machine-readable climbing plan and a function to share climbing plans among users is implemented.
Abstract: We developed a climbing plan sharing system. While climbing plan documents that have been created in Microsoft Word or PDF format have a lot of climbing information, a computer cannot understand climbing information efficiently because the climbing information is written in a natural language. We developed a system that converts a climbing plan document into a machine-readable climbing plan. Also we have implemented a function to share climbing plans among users. The system can display a climbing plan on a Web browser effectively. Our system can help climbers to share machine-readable climbing plan documents. Therefore, users can share and accumulate climbing information that are difficult a climbing plan document written in a natural language.
1 citations
06 Dec 2015
TL;DR: The results of experimental evaluation showed that the proposed method, called the stable layered canvas mechanism (SL), is able to achieve real-time redrawing while maintaining the order of the drawings and enhances the availability of HTML5 Canvas for collaborative Web applications running on low performance devices such as tablets and smartphones.
Abstract: Real-time collaborative Web applications are being extensively studied and several DOM-based efficient synchronization methods have been proposed. However, there has not been sufficient study on 2D drawing synchronization on Web browsers. We have been focused on resolving issues related to drawing delay when synchronizing HTML5 Canvas, which is a DOM element for 2D drawing, and previously proposed two methods that assign drawings to multiple canvas elements in order to improve the delay. Synchronization delay includes network and drawing delays. Network delays have been investigated by various researchers. However, the two methods we previously proposed ignore the order of objects in order to improve the performance. In the present work, we propose a new object assignment method that can keep the order of the drawings on the canvas while redrawing a canvas in real time. The results of experimental evaluation showed that the proposed method, called the stable layered canvas mechanism (SL), is able to achieve real-time redrawing while maintaining the order of the drawings. This mechanism enhances the availability of HTML5 Canvas for collaborative Web applications running on low performance devices such as tablets and smartphones.
1 citations
12 Jul 2015
TL;DR: A new collaborative workspace support framework for general-purpose desktop applications using a transparent layer with two aspects, visible- and event-transparency, that enables seamless content, screenshot, and file sharing using the transparent layers.
Abstract: We address issues of collaborative workspaces using multiple general-purpose desktop applications. Despite the fact that users would prefer to use familiar desktop applications in collaboration with other people, they must currently use collaborative applications such as Google Docs instead. This study aims to implement a new collaborative workspace support framework for general-purpose desktop applications. To create the framework, we introduced a transparent layer with two aspects, visible- and event-transparency. The background of the transparent layer can be opaque. The transparent layer can forward received events to other layers as well as to other applications. We have been developing a new web browser, Silhouette Web Browser, that enables seamless content, screenshot, and file sharing using the transparent layers. This study describes the architecture and implementation of the proposed browser and its applications.
31 Dec 2015
TL;DR: This paper analyzed existing unstructured mountaineering plans to find a common item set for the machine-readable Mountaineering plan format and revealed frequent items in existing mountaineered plans and classified the items into four common parts.
Abstract: A mountaineering plan is any diagram or list of steps with timing and resources for climbing, and mountaineering plans are worth accumulating and sharing; however, existing mountaineering plans are largely unstructured.Mountaineering plan documents are important because they are used in case of mountaineering accidents.In this study, we developed a machine-readable mountaineering plan format to reuse existing mountaineering plans. The machine-readable mountaineering plan helps us to adapt an existing plan to a new one.In this paper, we analyze existing unstructured mountaineering plans to find a common item set for the machine-readable mountaineering plan. We collected various existing unstructured mountaineering plans from from different sources for the analysis.As a result, we revealed frequent items in existing mountaineering plans and classified the items into four common parts. Moreover, we developed a mountaineering plan editing system that can automatically import existing unstructured mountaineering plans as machine-readable mountaineering plans.
31 Dec 2015
TL;DR: The architecture and implementation of the proposed platform, which uses one’s desktop as a collaborative workspace in consideration of interference to users, and a new web browser that consists of five transparent layers including existing desktop layers are described.
Abstract: We have developed a novel collaborative web platform that shares a part of one’s desktop. In the case of using a general desktop sharing software such as VNC and TeamViewer, all users interfere with each other on a shared desktop, resulting in disturbing user’s work. Prior work has proposed a common collaborative workspace, but there are problems with collaborative workspaces using desktop applications. The platform uses a part of user’s desktop as a collaborative workspace in consideration of interference to a user. To create the platform, we introduce a transparent layer with two aspects: visible- and event-transparency. The background of the transparent layer can be opaque. The transparent layer can forward received events to other layers as well as to other applications. The layer can interact with a user’s desktop, thus taking a screenshot of a user’s desktop and sharing the screen shot among other users. Furthermore, we have been developing a new web browser, Silhouette Web Browser, that consists of five transparent layers including existing desktop layers. The platform shares one’s desktop by using transparent layers, thus using one’s desktop as a collaborative workspace in consideration of interference to users. This paper describes the architecture and implementation of the proposed platform and its application.