The Grid 2: Blueprint for a New Computing Infrastructure

The questionnaires from the field were received, checked and stored by the data processing personnel. They checked: 1. The completeness of the questionnaires 2. The correct bubbling 3. The correct number of questionnaires per household, if total males + total females > 8 as the questionnaire ONLY accommodated maximum of 8 household members. 4. The reference number appears in all the 10 pages of the questionnaires.

Population and Housing Census

Hawaii International Conference on System Sciences

The growing commercial interest in indoor location-based services (ILBS) has spurred recent development of many indoor positioning techniques. Due to the absence of global positioning system (GPS) signal, many other signals have been proposed for indoor usage. Among them, Wi-Fi (802.11) emerges as a promising one due to the pervasive deployment of wireless LANs (WLANs). In particular, Wi-Fi fingerprinting has been attracting much attention recently because it does not require line-of-sight measurement of access points (APs) and achieves high applicability in complex indoor environment. This survey overviews recent advances on two major areas of Wi-Fi fingerprint localization: advanced localization techniques and efficient system deployment. Regarding advanced techniques to localize users, we present how to make use of temporal or spatial signal patterns, user collaboration, and motion sensors. Regarding efficient system deployment, we discuss recent advances on reducing offline labor-intensive survey, adapting to fingerprint changes, calibrating heterogeneous devices for signal collection, and achieving energy efficiency for smartphones. We study and compare the approaches through our deployment experiences, and discuss some future directions.

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Wi-Fi Fingerprint-Based Indoor Positioning: Recent Advances and Comparisons

The spatial features of emitted wireless signals are the basis of location distinction and determination for wireless indoor localization. Available in mainstream wireless signal measurements, the Received Signal Strength Indicator (RSSI) has been adopted in vast indoor localization systems. However, it suffers from dramatic performance degradation in complex situations due to multipath fading and temporal dynamics. Break-through techniques resort to finer-grained wireless channel measurement than RSSI. Different from RSSI, the PHY layer power feature, channel response, is able to discriminate multipath characteristics, and thus holds the potential for the convergence of accurate and pervasive indoor localization. Channel State Information (CSI, reflecting channel response in 802.11 a/g/n) has attracted many research efforts and some pioneer works have demonstrated submeter or even centimeter-level accuracy. In this article, we survey this new trend of channel response in localization. The differences between CSI and RSSI are highlighted with respect to network layering, time resolution, frequency resolution, stability, and accessibility. Furthermore, we investigate a large body of recent works and classify them overall into three categories according to how to use CSI. For each category, we emphasize the basic principles and address future directions of research in this new and largely open area.

From RSSI to CSI: Indoor Localization via Channel Response, A survey on indoor localization using PHY-layer information

Mapping virtual process topology to physical processor topology is one of the most important issues in parallel computing. The mapping problem for switch-based cluster systems of irregular topology is very complicated due to the connection irregularity and routing complexity. This paper proposes two mapping schemes for irregular cluster systems, which try to map the nearest neighbors in the process topology to physically adjacent processors. In addition, an application-oriented performance metric, weighted cardinality, is introduced to represent the quality of mapping. A simulation study shows that, for a virtual topology of a 16/spl times/16 mesh, the proposed mapping schemes result in better mapping quality and about 15/spl sim/20% shorter communication latency compared to random mapping. The proposed algorithms should also be beneficial when they are applied to metacomputing and cluster of cluster systems, where the communication costs are an order of magnitude different depending on the relative position of the processor nodes.

Mapping strategies for switch-based cluster systems of irregular topology

In large scale enterprises composed of more than several hundred departments, many workflows still remain in a non-automated state which is a serious burden to the enterprises. Usually workflow of a large scale enterprise is in the mixed form of multiple types of workflow where ad hoc workflow is the major hurdle for the automation. While conventional workflow systems support a certain type of workflow well, it does not get along with a mixed type of workflow. We classify ad hoc workflow into structured and inherently ad hoc workflow and propose a workflow system equipped with a connector facility to support structured ad hoc workflow such as a decision approval process. The connector facility can be regarded as a semi-workflow system to support structured ad hoc workflow effectively or it can be a subsidiary facility for a workflow system to enforce the support of the structured ad hoc workflow in the base workflow system. We are implementing it in Hanuri/TFlow, our distributed transactional workflow system and the details of the connector-oriented extensions to the system are described.

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Connector-oriented workflow system for the support of structured ad hoc workflow

Disclosed are a system and a method for a location-based service for navigating indoors. The system for a location-based service according to the present invention comprises: a plurality of access points; a mobile terminal, which is connected to at least one of the plurality of access points, receives a Wi-Fi signal transmitted from the access point, and forms a first Wi-Fi fingerprint using the received Wi-Fi signal; and a navigation service server, which is connected to the mobile terminal, generates a plurality of Wi-Fi radio maps that correspond to a plurality of second Wi-Fi fingerprints by using the plurality of second Wi-Fi fingerprints that correspond to a plurality of indoor locations, selects, from the plurality of Wi-Fi radio maps, a Wi-Fi radio map for estimating the location of the mobile terminal, and estimates the location of the mobile terminal from the second Wi-Fi fingerprint that corresponds to the first Wi-Fi fingerprint, on the basis of the selected Wi-Fi radio map.

System and method for location-based service for navigating indoors

In this paper, we introduce a mobile u-health service system, named THE-MUSS, which supports u-health service development and running, with functions, modules, and facilities that are commonly required for various mobile u-health services. Basic modules to support bio-signal capturing, processing, analysis, diagnosis, feedbacks are prepared and stacked in the system. Reusability and evolvability are elicited as the primary design goals to achieve in developing THE-MUSS after the understanding of u-health service characteristics. U-health service platform, u-health ontology incorporated u-health service design tool, Matrix based disease group identification framework, and u-health portal are the major components constructing the layered architecture of THE-MUSS. Mobile stress and weigh management services are developed on THE-MUSS to confirm and evaluate the usefulness of THE-MUSS in developing mobile u-health services. According to the evaluation, it turned out that THE-MUSS has strength in reusability and evolvability, but also in system flexibility, adaptability, interoperability, and guideline provision for developing u-health services.

THE-MUSS: Mobile U-Health Service System

With the wide spread use of cellular phones and the increased interests in the well-being of people, many vendors of cellular phones start to embed a variety of e-health services in their cellular phones. In this paper, we propose an e-health platform on which e-health services can be systematically developed by utilizing various functions and features, and by following guidelines provided by the platform.

Dongsoo Han

Papers

Mapping strategies for switch-based cluster systems of irregular topology

Connector-oriented workflow system for the support of structured ad hoc workflow

System and method for location-based service for navigating indoors

THE-MUSS: Mobile U-Health Service System

An Evolving Mobile E-Health Service Platform