ppxscal/embedding_network huggingface dataset:
A method for predicting future location of mobile user for location-based services system
Authors: Thi Hong Nhan Vu, Keun Ho Ryu, Namkyu Park
Venue: Computers and Industrial Engineering (2009)

Convergence of location-aware devices, wireless communications, and geographic information system (GIS) functionalities has been enabling the deployment of a new generation of selective information disseminating services and location-based services (LBSs). Current LBSs use information about current locations of users to provide services, such as nearest features of interest, they request. Although the common computing strategy in LBSs benefits the users, there are additional benefits when future locations are predicted. One major advantage of location prediction is that it provides LBSs with extended resources, mainly time, to improve system reliability which in turn increases the users' confidence and the demand for LBSs. In this study, we propose a movement Rule-based Location Prediction method (RLP), to guess the user's future location for LBSs. Its performance is assessed with respect to precision and recall. In comparison with the previous technique, the prediction accuracy of ours is higher. With the proposed approach, we give an efficient support to the LBSs provider in monitoring user intelligently and sending information to user in a push-driven fashion. Apart from the support of timely and desired services and enhanced automation, the technique helps overcome some existing issues such as network flooding due to the massive tracking of users, the latencies of the positioning systems in providing and information delivery. Accordingly, the positioning is more reliable, which enables the service provider to effectively and efficiently offer location-based services with high frequency.
Use of spatial structure analysis of hyperspectral data cubes for detection of insect-induced stress in wheat plants
Authors: Christian Nansen, Tulio Macedo, Rand Swanson, David K. Weaver
Venue: International Journal of Remote Sensing (2009)

Wheat plants were experimentally infested with wheat stem sawflies, and hyperspectral images (reflectance range from 402.8-838.7 nm) were collected from leaves of infested and non-infested plants. Mean and variance reflectance per leaf were calculated in five of 213 spectral bands (452, 553, 657, 725, and 760 nm) and compared with vegetation indices (NDVI, SI and PRI), and standard variogram parameters (nugget, sill and range values). Mean reflectance values and their variance values and vegetation indices showed significant effects of sawfly infestation in one dataset but not in another. Based on directional variogram analyses, we showed that: (1) better separation of leaf type and infested/non-infested wheat plants was seen in variograms in longitudinal direction compared to transverse; (2) mainly spectral bands in the red edge and NIR showed consistent effect of sawfly infestation; (3) range values were not affected significantly by either sawfly infestation or leaf type; and (4) sawfly-induced stress was most likely to be detected about three weeks after infestation. Variogram analysis is one of the key standards in quantitative spatial ecology, and this study supports further research into its use in remote sensing with particular emphasis on detection of biotic stress.
Femtosecond laser-induced silicon surface morphology in water confinement
Authors: Yukun Han, Cheng-Hsiang Lin, Hai Xiao, Hai-Lung Tsai
Venue: Microsystem Technologies (2009)

This article investigates the use of femtosecond laser induced surface morphology on silicon wafer surface in water confinement. Unlike irradiation of silicon surfaces in the air, there are no laser induced periodic structures, but irregular roughness is formed when the silicon wafer is ablated under water. The unique discovery of a smoothly processed silicon surface in water confinement under certain laser parameter combinations may help improve laser direct micromachining surface quality in industrial applications.
Passive Optical Networks: Principles and Practice
Authors: Cedric F. Lam
Venue:  (2007)

Passive optical network (PON) technologies have become an important broadband access technology as a result of the growing demand for bandwidth-hungry video-on-demand applications. Written by the leading researchers and industry experts in the field, this book provides coherent coverage of networking technologies, fiber optic transmission technologies, as well as the electronics involved in PON system development.Features:* An in-depth overview of PON technologies and the potential applications that they enable* Comprehensive review of all major PON standards and architecture evolutions, as well as their pros and cons* Balanced coverage of recent research findings with economic and engineering considerations* Presents system issues of protocols, performance, management and protection* Extensive references to standards and research materials for further studiesThis book provides an authoritative overview of PON technologies and system requirements and is ideal for engineers and managers in industry, university researchers, and graduate students. *Balances treatment of the optical technologies with systems issues such as protocols, performance, management and protection*Covers latest developments in WDM-PONS, protection switching, dynamic bandwidth allocation*Practical coverage with a chapter on PON applications and deployment*Case studies on implementing PONs The ACM Portal is published by the Association for Computing Machinery. Copyright © 2010 ACM, Inc. Terms of Usage Privacy Policy Code of Ethics Contact Us Useful downloads: Adobe Acrobat QuickTime Windows Media Player Real Player
Designing high performance and scalable distributed datacenter services over modern interconnects
Authors: D. K. Panda
Venue:  (2008)

Modern interconnects like InfiniBand and 10 Gigabit Ethernet have introduced a range of novel features while delivering excellent performance. Due to their high performance to cost ratios, increasing number of datacenters are being deployed in clusters and cluster-of-cluster scenarios connected with these modern interconnects. However, the extent to which the current deployments manage to benefit from these interconnects is often far below the achievable levels. In order to extract the possible benefits that the capabilities of modern interconnects can deliver, selective redesigning of performance critical components needs to be done. Such redesigning needs to take the characteristics of datacenter applications into account. Further, performance critical operations common to multiple datacenter applications like caching, resource management, etc. need to be identified and redesigned utilizing the features of modern interconnects. These operations can be designed and implemented as system services such that they can be provided in a consolidated platform for all other datacenter applications and services to utilize. In this thesis we explore various techniques to leverage the advanced features of modern interconnects to design these distributed system services. We identify a set of services with high performance requirements that have wide utility in datacenters scenarios. In particular, we identify distributed lock management, global memory aggregation and large scale data-transfers as performance critical operations that need to be carefully redesigned in order to maximize the benefits using of modern interconnects. We further explore the use of these primitive operations and RDMA capabilities of modern interconnects to design highly efficient caching schemes which are critical to most datacenters. We present these components in a layered framework such that applications can leverage the benefits of these services through pre-defined interfaces. We present detailed experimental results demonstrating the benefits of our approaches.
The ANN simulation of stress wave based NDT on concrete structures
Authors: Young Sang Cho, Seong Uk Hong
Venue: Proceedings of the 7th WSEAS international conference on System science and simulation in engineering (2008)

As infrastructures are being deteriorated, non-destructive evaluation of existing structures and construction quality control are increasingly demanded. This paper is to study flaw detection technique of concrete members using Impact Echo method, which is one of the non-destructive test methods. This technique is based on stress wave propagation. The concrete members of the flaw detection consist of 5 types; one group for the thickness presumption, one group for the position of the aperture, one group for the position of the steel bar, one group that the steel plate is buried in it, and one group that PVC tube is buried in it. The Artificial Neural Network Technology was used for training of the thickness presumption of the concrete members. Experiments were performed using five types of concrete members that have simulated damages at known locations for tests and analysis. Test results are evaluated and summarized in this paper.
Performance improvement with haptic assistance: A quantitative assessment
Authors: Chris Gunn, Warren Muller, Amitava Datta
Venue: Proceedings of the World Haptics 2009 - Third Joint EuroHaptics conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (2009)

We measure the performance improvement that force feedback can provide in a virtual environment, through three experiments with, and without the assistance of haptic guidance. Performance measurements were undertaken with haptic, visual and auditory feedback alternatives. The first task investigated the use of haptic guidance mimicking reality, in the form of a simulated touchable surface of an object. The second investigated haptic guidance which waxed and waned as the user violated program rules by varying amounts. The third experiment investigated whether this latter artificial guidance would inhibit the user's free will by taking control out of their hands. The results showed that a significant improvement in both accuracy and speed was achieved by the introduction of haptics in all experiments. It also found that the haptic guidance did not take control away from the user and that they had significantly more control than with conventional warning methods. These experiments were not aimed at learning, or retention of skill, but on using haptics as an aid to improve performance during a task.
A physics-inspired model of image structure representation by deformable elastic grid
Authors: X. D. Zhuang, N. E. Mastorakis
Venue: Proceedings of the 7th WSEAS international conference on Computational intelligence, man-machine systems and cybernetics (2008)

A novel physics-inspired model is proposed for image structure representation. The deformable elastic grid is defined on digital images. The attracting force between adjacent points is defined according to the gray-scale difference, which is the source of force causing the deformation of the elastic grid. The final shape of the grid after deformation can represent image structure information, based on which a segmentation method is proposed for digital images. Experimental results indicate the effectiveness of the proposed method.
Identifying Ecological Traits: A Concrete FCA-Based Approach
Authors: Aurélie Bertaux, Florence Ber, Agnès Braud, Michèle Trémolières
Venue: Proceedings of the 7th International Conference on Formal Concept Analysis (2009)

This paper describes a method to identify so-called ecological traits of species based on the analysis of their biological characteristics. This biological dataset has a complex structure that can be formalized as a fuzzy many-valued context and transformed into a binary context through histogram scaling. The core of the method relied on the construction and interpretation of formal concepts and was used on a 50 species × 124 histogram attributes table. The concepts were analyzed with the help of an hydrobiologist, leading to a set of ecological traits which were inserted in the original context for validation.
The Personal Knowledge Workbench of the NEPOMUK Semantic Desktop
Authors: Gunnar Aastrand Grimnes, Leo Sauermann, Ansgar Bernardi
Venue: Proceedings of the 6th European Semantic Web Conference on The Semantic Web: Research and Applications (2009)

In this paper we describe some of the personal information management features found in the PSEW prototype of the NEPOMUK Semantic Desktop project. Focussing on importing and adding new knowledge to the system as well as navigating, browsing, and searching the existing knowledge we show how a user can use NEPOMUK to integrate her information across application boundaries and create and discover new structures in her information space.
Expanding the Knowledge Economy: Issues, Applications, Case Studies - Volume 4 Information and Communication Technologies and the Knowledge Economy - Two Volume Set
Authors: P. Cunningham, P. Cunningham, M. Cunningham
Venue:  (2007)

Commercializing and exploiting applied Information and Communication Technologies (ICT) research results is critical in reducing the global Digital Divide and building a sustainable Knowledge Economy. A major challenge for leveraging ICT around the world is taking account of local and regional differences. This requires meaningful cross-border communication between researchers, government and industry, as well as strategic dialogues in relation to regulation and policy. While it is clear that the Digital Divide can be challenging in Europe and the Americas, clearly there are greater difficulties to be overcome in Asia and Africa. That acknowledged, it is often striking how once basic infrastructure and regulatory issues have been addressed and how learning from the experiences of others can enhance the impact of leveraging ICT. This book brings together a comprehensive collection of over 210 in ten broad thematic areas. These are: ICT for Networked Enterprise; e-Government and e-Democracy; eHealth, Collaborative Working Environments; Networked, Smart and Virtual Organizations; SME Issues; Technology Enhanced Learning and ICT Skills; Security and Identity Management; and Mobility and Digital Content. Papers within each thematic area are grouped as Issues, Applications and Case Studies, reflecting their primary focus.IOS Press is an international science, technical and medical publisher of high-quality books for academics, scientists, and professionals in all fields. Some of the areas we publish in: -Biomedicine -Oncology -Artificial intelligence -Databases and information systems -Maritime engineering -Nanotechnology -Geoengineering -All aspects of physics -E-governance -E-commerce -The knowledge economy -Urban studies -Arms control -Understanding and responding to terrorism -Medical informatics -Computer Sciences
Three-dimensional facial expression modeling and analysis with topographic information
Authors: Lijun Yin
Venue:  (2008)

Research on face tracking, modeling and animation techniques has been intensified due to its wide range of applications. There is a long history of interest in the problem of recognizing human emotion from facial expressions. My work focuses on the detection and description of facial expression features. First we introduce the new face tracking and modeling algorithm, which effectively extracted certain feature points, head pose orientation, and eye close-open status from input videos. Based on the detected facial features, a 3D face model is animated by a dynamic inference algorithm which transforms facial motion parameters to facial animation parameters. A factorization and synthesis based approach is introduced, together with our proposed topographic feature based modeling approach. As a result, given a face image at a front view, a realistic facial model can be generated using the extended topographic analysis and model instantiation approach. Secondly we present a novel 3D-based facial expression analysis algorithm to overcome the disadvantages of the traditional 2D-based analysis, which is incapable of handling large pose variations. 3D modeling techniques haven't been used on 3D facial expression recognition due to the lack of a publicly available 3D facial expression database. Thus we developed a 3D static facial expression database, including both prototypical 3D facial expression shapes and 2D facial textures of 2,500 static models from 100 subjects. This is the first attempt to create a 3D facial expression database for the research community. The last part of the thesis presents our study on the usefulness of such data for recognizing and understanding facial expressions. We investigated the importance and usefulness of 3D facial geometric shapes to represent and recognize facial expressions using 3D static facial expression range data. We extract primitive 3D facial expression features, and apply the feature distribution to classify the prototypic facial expressions. Experiments were conducted on person-independent facial expression recognition to validate the algorithm. The experimental result demonstrates the advantage of our 3D geometric based approach over 2D texture based approaches in conditions of head poses changes and illumination variations as well as a significant improvement on recognition accuracy.
GUIDE: Games with UML for Interactive Design Exploration
Authors: Jennifer Tenzer
Venue: Proceeding of the 2005 conference on New Trends in Software Methodologies, Tools and Techniques: Proceedings of the fourth SoMeT_W05 (2005)

In this paper we present our design tool GUIDE, which allows the user to explore a design in UML interactively by playing a game. The game incorporates both the design model and a specification of what it means for the design to be correct. The central idea of this approach is that the designer can increment the game during a play and gradually add more detail to it. Specification and design are refined by repeated plays of the game. The designer stops playing when design and specification are detailed enough for his purpose and fit to each other. The interactive game approach helps to cope with incompleteness and informal definition of UML models, which make strictly formal verification techniques difficult. The designer may resolve these problems when they arise during a play or let the GUIDE tool determine how the play should proceed.
Seamless content delivery
Authors: Theodore Zahariadis, George Leoleis, Thomas Schierl, Karsten Grüneberg
Venue: Proceedings of the 4th Annual International Conference on Wireless Internet (2008)

Widespread and affordable broadband access opens up opportunities for delivery of new streaming services. However, what is expected to fundamentally change the way that people use the network is the ability to produce, and seamlessly deliver and share their own multimedia content. SEA consortium is confident that in a few years everyone will be multimedia content producer, mediator and consumer, and aims to provide the means to distribute A/V user-centric services, with superior quality and flexibility, in a trusted and personalized way.
Simulating patient flow through an Emergency Department using process-driven discrete event simulation
Authors: M. Raunak, L. Osterweil, A. Wise, L. Clarke, P. Henneman
Venue: Proceedings of the 2009 ICSE Workshop on Software Engineering in Health Care (2009)

This paper suggests an architecture for supporting discrete event simulations that is based upon using executable process definitions and separate components for specifying resources. The paper describes the architecture and indicates how it might be used to suggest efficiency improvements for hospital Emergency Departments (EDs). Preliminary results suggest that the proposed architecture provides considerable ease of use and flexibility for specifying a wider range of simulation problems, thus creating the possibility of carrying out a wide range of comparisons of different approaches to ED improvement. Some early comparisons suggest that the simulations are likely to be of value to the medical community and that the simulation architecture offers useful flexibility.
Using a groupware system in CS1 to engage introverted students
Authors: Gloria Childress Townsend
Venue: ACM SIGCSE Bulletin (2009)

Concern with declining numbers of computer science majors leads educators to examine recruitment and retention factors in Computer Science I (CS1), in order to increase the number of students entering the undergraduate computer science pipeline. The literature reveals that introverted students dominate the CS1 classroom at a rate more than twice that of the general population and that the students perform better in the course as a group than extraverts do. Therefore, increasing the comfort level and engagement of introverted students seems practical - as well as thoughtful. The author of this paper hypothesizes that encouraging students to use an anonymous submission feature in a groupware system will increase the comfort of shy students who are reluctant to engage in the CS1 classroom. A study reveals a significant difference between a group of students who used the same groupware system without instruction regarding the groupware system's anonymous feature and a treatment group of students who received instruction and were encouraged to use the anonymous feature. The project also uncovers several significant correlations among students' responses to various items in the survey instrument.
Coalition Formation Strategies for Self-Interested Agents
Authors: Thomas Génin, Samir Aknine
Venue: Proceeding of the 2008 conference on ECAI 2008: 18th European Conference on Artificial Intelligence (2008)

Coalition formation is a major research issue in multiagent systems in which the agents are self-interested. In these systems, agents have to form groups in order to achieve common goals, which they are not able to achieve individually. A coalition formation mechanism requires two definition levels: firstly agents need a common protocol to reach an agreement and secondly individual strategies are required to make efficient proposals. Both issues are addressed in this paper. First, we propose a two-phase decentralized protocol that allows agents to interact directly through message passing. Secondly we propose some strategies which allow agents to make clever proposals using the information that has already been collected from other agents. The experimental evaluation shows that the proposed mechanism allows agents to efficiently form coalitions and that the strategies make real improvements for the coalition search process.
Solution of the Schrodinger-Maxwell equations via finite elements and genetic algorithms with Nelder-Mead
Authors: Nikos E. Mastorakis
Venue: WSEAS Transactions on Mathematics (2009)

In this paper the Numerical Solution of the system of PDEs of Schrodinger-Maxwell equations (with a general nonlinear term) via Finite Elements and Genetic Algorithms with Nelder-Mead is proposed. The method of Finite Elements and Genetic Algorithms with Nelder-Mead that has been proposed by the author recently is also used. (Recently, the existence of a nontrivial solution to the nonlinear Schrodinger-Maxwell equations in R3, assuming on the nonlinearity the general hypotheses introduced by Berestycki & Lions has been proved).