ppxscal/embedding_network huggingface dataset:
Routing Metric for Interference and Channel Diversity in Multi-Radio Wireless Mesh Networks
Authors: Vinicius C. Borges, Daniel Pereira, Marilia Curado, Edmundo Monteiro
Venue: Proceedings of the 8th International Conference on Ad-Hoc, Mobile and Wireless Networks (2009)

More than providing a wireless structure for Internet access, Wireless Mesh Networks are being challenged to support diverse kinds of multimedia applications such as Voice over IP and video streaming in publish-subscriber and peer-to-peer service models. In this context, several routing metrics have been proposed to improve the routing performance as well as the network capability to satisfy the requirements of multimedia applications. However, most routing metrics lack the consistent integration of efficient monitoring mechanisms for interference and traffic load characterization in order to support the adequate decisions by the routing algorithms. In this sense, a new routing metric is proposed in this paper, called Metric for INterference and channel Diversity (MIND), that measures network interference and load, based on a passive monitoring mechanism in order to avoid the overhead of active network state information gathering. An evaluation of MIND and relevant existing routing metrics was performed using NS2. The results showed that when path selection is based on MIND, traffic performance is significantly better than with the other metrics.
On the Role of Social Interaction in Individual Agency
Authors: Hanne De Jaegher, Tom Froese
Venue: Adaptive Behavior - Animals, Animats, Software Agents, Robots, Adaptive Systems (2009)

Is an individual agent constitutive of or constituted by its social interactions? This question is typically not asked in the cognitive sciences, so strong is the consensus that only individual agents have constitutive efficacy. In this article we challenge this methodological solipsism and argue that interindividual relations and social context do not simply arise from the behavior of individual agents, but themselves enable and shape the individual agents on which they depend. For this, we define the notion of autonomy as both a characteristic of individual agents and of social interaction processes. We then propose a number of ways in which interactional autonomy can influence individuals. Then we discuss recent work in modeling on the one hand and psychological investigations on the other that support and illustrate this claim. Finally, we discuss some implications for research on social and individual agency.
A Novel Meta-data Synchronous Write Mechanism for Cluster File System
Authors: Jun Lu, Yi Zhu, Bin Du, Ly Ren, Rui Li
Venue: Proceedings of the 2009 International Forum on Information Technology and Applications - Volume 01 (2009)

In cluster file system, the meta-data represents the key information of a file. In order to make sure the safety of meta-data, the most of cluster file system write the meta-data to disk as soon as possible to suffer the possible failure of underlying facilities, such as node accidentally crash. The synchronous disk write of meta-data is a performance bottle of cluster file system. This paper presents a high performance cooperative synchronous write mechanism for meta-data: CSWM. CSWM is a pure software mechanism which provides the reliability of synchronous write operations with the performance of asynchronous write operations. The meta-data synchronously witted in CSWM are saved on both two cooperative meta-data server before being written to disk. Then, CSWM can ensure the safety of meta-data and improve the cluster file system performance. The experiments in this paper prove that CSWM can effectively improve the performance of cluster file system.
Use of Multiword Terms and Query Expansion for Interactive Information Retrieval
Authors: Fidelia Ibekwe-Sanjuan, Eric Sanjuan
Venue: Advances in Focused Retrieval: 7th International Workshop of the Initiative for the Evaluation of XML Retrieval, INEX 2008, Dagstuhl Castle, Germany, December 15-18, 2008. Revised and Selected Papers (2009)

This paper reports our participation in the INEX 2008 Ad-Hoc Retrieval track. We investigated the effect of multiword terms on retrieval effectiveness in an interactive query expansion (IQE) framework. The IQE approach is compared to a state-of-the-art IR engine (in this case Indri) implementing a bag-of-word query and document representation, coupled with pseudo-relevance feedback (automatic query expansion(AQE)). The performance of multiword query and document representation was enhanced when the term structure was relaxed to accept the insertion of additional words while preserving the original structure and word order. The search strategies built with multiword terms coupled with QE obtained very competitive scores in the three Ad-Hoc tasks: Focused retrieval, Relevant-in-Context and Best-in-Context.
Off-body Communication for Protective Clothing
Authors: Carla Hertleer, Lieva Van Langenhove, Hendrik Rogier, Luigi Vallozzi
Venue: Proceedings of the 2009 Sixth International Workshop on Wearable and Implantable Body Sensor Networks (2009)

Because of the emerging research into wearable textile systems, functionality of personal protective clothing is increasingly enhanced. High performance fabrics protect the wearer from extreme environmental conditions, whereas monitoring systems provide information about his physical and surrounding conditions during emergency activities. To transfer the collected data from the sensors as part of the wearable system to an external nearby base station, a wireless communication device is required in the garment. In order to allow maximum integration of this antenna into the clothing, flexible textile antennas are introduced. In this work, a foam-based antenna for integration into a protective outer garment is developed and tested.
Ordinal Regression Based Model for Personalized Information Retrieval
Authors: Mohamed Farah
Venue: Proceedings of the 2nd International Conference on Theory of Information Retrieval: Advances in Information Retrieval Theory (2009)

Retrieving relevant items as a response to a user query is the aim of each information retrieval system. But `without an understanding of what relevance means to users, it is difficult to imagine how a system can retrieve relevant information for users' [1]. In this paper, we try to capture what relevance is for a particular user and model his profile implicitly considering his non declared preferences that are inferred from a ranking of a reduced set of retrieved documents that he produces. We propose an ordinal regression based model for interactive ranking which uses both the information given by this subjective ranking, as well as the multicriteria evaluation of these ranked documents, to adjust optimally the parameters of a ranking model. This model consists of a set of additive value functions which are built so as they are as compatible as possible with the subjective ranking. The preference information used in our model requires reasonable cognitive effort from the user.
Usage Automata
Authors: Massimo Bartoletti
Venue: Foundations and Applications of Security Analysis: Joint Workshop on Automated Reasoning for Security Protocol Analysis and Issues in the Theory of Security, ARSPA-WITS 2009, York, UK, March 28-29, 2009, Revised Selected Papers (2009)

Usage automata are an extension of finite stata automata, with some additional features (e.g. parameters and guards) that improve their expressivity. Usage automata are expressive enough to model security requirements of real-world applications; at the same time, they are simple enough to be statically amenable, e.g. they can be model-checked against abstractions of program usages. We study here some foundational aspects of usage automata. In particular, we discuss about their expressive power, and about their effective use in run-time mechanisms for enforcing usage policies.
Towards a Manifesto for Living Lab Co-creation
Authors: Asbjørn Følstad, Petter Bae Brandtzæg, Jan Gulliksen, Mikael Börjeson, Pirjo Näkki
Venue: Proceedings of the 12th IFIP TC 13 International Conference on Human-Computer Interaction: Part II (2009)

There is a growing interest in Living Labs for innovation and development in the field of information and communication technology. In particular there seem to be a tendency that current Living Labs aim to involve users for co-creative purposes. However, the current literature on Living Lab co-creation is severely limited. Therefore an Interact workshop is arranged as a first step towards a manifesto for Living Lab co-creation.
Compressing Packets Adaptively Inside Networks
Authors: Masayoshi Shimamura, Takeshi Ikenaga, Masato Tsuru
Venue: Proceedings of the 2009 Ninth Annual International Symposium on Applications and the Internet (2009)

Introducing adaptive online data compression at network-internal nodes is considered to mitigate congestion on the network. In this paper, assuming that advanced relay nodes, which possess both a relay function (network resource) and a processing function (computational and storage resources), are placed inside the network, we propose an adaptive online lossless packet compression scheme performed at these nodes. This scheme selectively compresses a packet according to the waiting time of the packet in the queue during the congestion period. Through computer simulations, we show that our proposed scheme reduces the packet delay and discard rate and investigate the key factors necessary in achieving an efficient packet relay.
The State of Client-Centered Public Service Delivery in the Netherlands
Authors: Jurjen Jansen, Sjoerd Vries, Thea Geest, Rex Arendsen, Jan Dijk
Venue: Proceedings of the 8th International Conference on Electronic Government (2009)

Businesses and citizens demand a better and more client-centered way of service delivery from public organizations. As society becomes more complex, dynamic and diverse, public organizations need to adapt to this demand. Conversely, our perception is that public organizations might still treat their target groups as one. However, the need for client-centered public service delivery is growing. This is widely debated in literature. Nonetheless, little empirical evidence is available about the state of client-centeredness of public organizations. The objective of the present study is to identify the state of client-centered public service delivery in the Netherlands. In order to research this topic 400 people from 194 Dutch public organizations were invited to complete an electronic questionnaire. 105 people responded. According to the respondents the state of client-centeredness is acceptable. However, only 25% of the public organizations seem to take differentiation as the point of departure for their service delivery.
A multiple attributes decision making method using individual and collaborative attribute data in a fuzzy environment
Authors: Zhi-Ping Fan, Bo Feng
Venue: Information Sciences: an International Journal (2009)

Although multiple attribute decision making (MADM) problems with both individual attribute data of a single alternative and collaborative attribute data of pairwise alternatives exist in the real world, they have seldom been a focus of research. This paper proposes a MADM method using individual and collaborative attribute data in a fuzzy environment, in which experts use linguistic variables to express their opinions. In the method, first, the evaluation matrix of individual attributes date and the judgment matrix of collaborative attributes data are constructed. Then, the central dominance of one alternative outranking other all alternatives is defined for aggregating the collaborative data. From this, an integrated decision matrix incorporating individual and collaborative attribute data is constructed. Further, based on an extended TOPSIS, the fuzzy positive-ideal solution (FPIS) and the fuzzy negative-ideal solution (FNIS) are determined, and the relative closeness of each alternative to the FPIS and FNIS is calculated to determine the ranking order of all alternatives. Finally, two examples are used to illustrate the applicability of the proposed method.
Thinking on ISCA Model from IT Goverance Perspective
Authors: Caifeng Zhang
Venue: Proceedings of the 2009 Asia-Pacific Conference on Information Processing - Volume 02 (2009)

ISCA is the abbreviation of information system of control and auditing. ISCA model provides framework guidelines for accounting informationization. This paper is oriented to related problems of accounting informationization in Chinese enterprises and borrows ideas from information technology (IS) governance to analyze ISCA model. I think that enterprises should shift their focus from technology and equipment to improving management, overall planning and organizational assurance. In order to improve internal control system of accounting informationization, Chinese enterprises should introduce standard certificate. At the same time, this paper distinguishes between related parties responsible for information system auditing and defines the focuses of their respective work.
Probabilistic Failure Propagation and Transformation Analysis
Authors: Xiaocheng Ge, Richard F. Paige, John A. Mcdermid
Venue: Proceedings of the 28th International Conference on Computer Safety, Reliability, and Security (2009)

A key concern in safety engineering is understanding the overall emergent failure behaviour of a system, i.e., behaviour exhibited by the system that is outside its specification of acceptable behaviour. A system can exhibit failure behaviour in many ways, including that from failures of individual or a small number of components. It is important for safety engineers to understand how system failure behaviour relates to failures exhibited by individual components. In this paper, we propose a safety analysis technique, failure propagation and transformation analysis (FPTA), which automatically and quantitatively analyses failures based on a model of failure logic. The technique integrates previous work on automated failure analysis with probabilistic model checking supported by the PRISM tool. We demonstrate the technique and tool on a small, yet realistic safety-related application.
Accuracy Synthesis of Stewart Platform Used in Testing System for Spacecraft Docking Mechanism
Authors: Xiaolin Dai, Qitao Huang, Junwei Han, Hongren Li
Venue: Proceedings of the 2009 International Conference on Measuring Technology and Mechatronics Automation - Volume 03 (2009)

Stewart platform used in testing system for two spacecraft’s motion docking mechanism requires high accuracy to achieve better simulation result. In this paper, an accuracy synthesis of the Stewart platform used in a testing system for spacecraft docking mechanism is presented. The method is based on the error model formed through differentiation of the kinematics equations of the platform and the investigation of sensitivity analysis in its workspace. The accuracy synthesis is implemented to allocate error parameters. Experimental results show errors of the Stewart platform are less than 1mm in whole 2000mm scales, and verifies the effectiveness of our method.
Brief paper: Optimal control problems with a continuous inequality constraint on the state and the control
Authors: R. C. Loxton, K. L. Teo, V. Rehbock, K. F. C. Yiu
Venue: Automatica (Journal of IFAC) (2009)

We consider an optimal control problem with a nonlinear continuous inequality constraint. Both the state and the control are allowed to appear explicitly in this constraint. By discretizing the control space and applying a novel transformation, a corresponding class of semi-infinite programming problems is derived. A solution of each problem in this class furnishes a suboptimal control for the original problem. Furthermore, we show that such a solution can be computed efficiently using a penalty function method. On the basis of these two ideas, an algorithm that computes a sequence of suboptimal controls for the original problem is proposed. Our main result shows that the cost of these suboptimal controls converges to the minimum cost. For illustration, an example problem is solved.
A novel image hash algorithm resistant to print-scan
Authors: Di Wu, Xuebing Zhou, Xiamu Niu
Venue: Signal Processing (2009)

With the rapid development of multimedia technology, how to establish the integrity of images has become an unavoidable problem. The transform between a digital image and its hard-copy makes the problem more complex. To simplify the content based authentication, we propose a print-scan resistant image hashing algorithm based on the Radon and wavelet transform. The Radon transforms an image to its luminance distribution, before the wavelet extracts the relationship of the different areas from the luminance distribution. Experimental results show that our algorithm is not only robust to print-scan and other common content-preserving processing, but also discriminable to content changes.
Modeling Un-authorized Land Use Sprawl with Integrated Remote Sensing-GIS Technique and Cellular Automata
Authors: Norzailawati Mohd. Noor, Mazlan Hashim
Venue: Proceedings of the International Conference on Computational Science and Its Applications: Part I (2009)

We have used cellular automata integrated with GIS and remote sensing to analyze urban sprawl aiming at analyzing expansion of potential un-authorized land uses for residential, commercial and industrial based on spatial factor deriving from remote sensing high resolution data. The spatial factors considered are used as parameter to measure either land use in these expansion process develop as urban legal sprawl or sprawl with declined the development planned (un-authorized). Results of the study indicated that residential area is most probable risk to un-authorized land use sprawl, given set of spatial factors considering the vicinity of highway strip, land use segregation and leapfrog development.
Relativistic Computers and Transfinite Computation
Authors: Philip D. Welch
Venue: Proceedings of the 8th International Conference on Unconventional Computation (2009)

(1) Simple models in Malament-Hogarth spacetimes, up to $\Delta^1_1$ or HYP.(2) Ordinal Time Register Machines: up to $\Pi^1_1$- .(3) Infinite Time Turing Machines: up to $\Pi^1_2$- Det($\Sigma^0_2)$ and beyond.In this paper we survey some of the complexity issues surrounding discrete models of transfinite recursion. We emphasise today the connections with Proof Theory, Reverse Mathematics, and Subsystems of Second Order Number Theory as set forth in Simpson's [13]. Our concerns are thus mainly the logico-mathematical ones of analysing such models rather `implementational concerns' (to put it broadly). 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
Model-Based Optimization of MPI Collective Operations for Computational Clusters
Authors: Alexey Lastovetsky
Venue: Proceedings of the 16th European PVM/MPI Users' Group Meeting on Recent Advances in Parallel Virtual Machine and Message Passing Interface (2009)

Computational clusters based on switched networks are widely used by the academic research community for high performance computing, with MPI being the primary programming tool for development of parallel applications. Contribution of communication operations into the execution time can be quite significant for many parallel applications on this platform. Therefore, minimization of the execution time of communication operations is an important optimization technique for high-performance computing on computational clusters.
Synthesis of Facial Images with Foundation Make-Up
Authors: Motonori Doi, Rie Ohtsuki, Rie Hikima, Osamu Tanno, Shoji Tominaga
Venue: Computational Color Imaging: Second International Workshop, CCIW 2009, Saint-Etienne, France, March 26-27, 2009. Revised Selected Papers (2009)

A method is described for synthesizing color images of whole human face with foundation make-up by using bare face image and the surface-spectral reflectance of the bare cheek. The synthesis of made-up facial images is based on the estimation of skin color with foundation make-up and the control of skin texture. First, the made-up skin color is estimated from the spectral reflectance of the bare cheek and the optical properties of the foundation. The spectral reflectance of made-up skin is calculated by the Kubelka-Munk theory. Second, smooth texture control is done by the intensity change of layers in the multi-resolution analysis with the Daubechies wavelet. Luster is enhanced and acnes are attenuated by the texture control. Experimental results show the accurate estimation of made-up skin color and the effective texture control. It is shown that the made-up face images are rendered with sufficient accuracy.
Empowering End Users in Design of Mobile Technology Using Role Play as a Method: Reflections on the Role-Play Conduction
Authors: Gry Seland
Venue: Proceedings of the 1st International Conference on Human Centered Design: Held as Part of HCI International 2009 (2009)

Role play as a method has several qualities that make it a profound candidate as a technique to understand user needs for mobile devices and services. However, making role-play participants act is a recognized but little discussed problem in relation to using role-play in design. This paper focuses on the how the role-play facilitator can arrange for the necessary conditions for making role-play participants act out realistic and relevant scenarios. The paper contributes with reflections on the role-play facilitator's conduction of role plays, by applying and discussing a general framework for role-play conduction on seven role play design workshops carried out in the period 2001 --- 2005. The framework on role play conduction originally developed by the psychologist Yardley-Matwiejczuk [1], and has previously not been applied to role-play design workshops.
The Effect of E-Learning on Business Organizations: A UAE Case Study
Authors: Osama Alshara, Mohamad Alsharo
Venue: Proceedings of the 3rd International Conference on Internationalization, Design and Global Development: Held as Part of HCI International 2009 (2009)

A major problem that most researchers in developing countries face is that of data availability. The UAE is experiencing advances in many areas; however, availability of raw data is not one of those areas. We are interested in measuring the level of response and adaptation as well as the correctness of the practice of e-learning in non-educational organizations in the UAE. We reviewed the literature to learn about the state-of the art of global practices and experiences of e-learning in non-educational organizations. Unfortunately, we were unable to find any reference to similar work that was done for the UAE market. This paper presents factors of implementing E-learning in non-educational organizations and how does that apply to the UAE culture. UAE based survey with a thorough analysis of the results are presented too.